--- /dev/null
+What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X
+Date: August 2008
+KernelVersion: 2.6.27
+Contact: mark.langsdorf@amd.com
+Description: These files exist in every cpu's cache index directories.
+ There are currently 2 cache_disable_# files in each
+ directory. Reading from these files on a supported
+ processor will return that cache disable index value
+ for that processor and node. Writing to one of these
+ files will cause the specificed cache index to be disabled.
+
+ Currently, only AMD Family 10h Processors support cache index
+ disable, and only for their L3 caches. See the BIOS and
+ Kernel Developer's Guide at
+ http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/31116-Public-GH-BKDG_3.20_2-4-09.pdf
+ for formatting information and other details on the
+ cache index disable.
+Users: joachim.deguara@amd.com
The current number of free dma_debug_entries
in the allocator.
+ dma-api/driver-filter
+ You can write a name of a driver into this file
+ to limit the debug output to requests from that
+ particular driver. Write an empty string to
+ that file to disable the filter and see
+ all errors again.
+
If you have this code compiled into your kernel it will be enabled by default.
If you want to boot without the bookkeeping anyway you can provide
'dma_debug=off' as a boot parameter. This will disable DMA-API debugging.
Notice that you can not enable it again at runtime. You have to reboot to do
so.
+If you want to see debug messages only for a special device driver you can
+specify the dma_debug_driver=<drivername> parameter. This will enable the
+driver filter at boot time. The debug code will only print errors for that
+driver afterwards. This filter can be disabled or changed later using debugfs.
+
When the code disables itself at runtime this is most likely because it ran
out of dma_debug_entries. These entries are preallocated at boot. The number
of preallocated entries is defined per architecture. If it is too low for you
gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \
mac80211.xml debugobjects.xml sh.xml regulator.xml \
- alsa-driver-api.xml writing-an-alsa-driver.xml
+ alsa-driver-api.xml writing-an-alsa-driver.xml \
+ tracepoint.xml
###
# The build process is as follows (targets):
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
+
+<book id="Tracepoints">
+ <bookinfo>
+ <title>The Linux Kernel Tracepoint API</title>
+
+ <authorgroup>
+ <author>
+ <firstname>Jason</firstname>
+ <surname>Baron</surname>
+ <affiliation>
+ <address>
+ <email>jbaron@redhat.com</email>
+ </address>
+ </affiliation>
+ </author>
+ </authorgroup>
+
+ <legalnotice>
+ <para>
+ This documentation is free software; you can redistribute
+ it and/or modify it under the terms of the GNU General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later
+ version.
+ </para>
+
+ <para>
+ This program is distributed in the hope that it will be
+ useful, but WITHOUT ANY WARRANTY; without even the implied
+ warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+ </para>
+
+ <para>
+ You should have received a copy of the GNU General Public
+ License along with this program; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ MA 02111-1307 USA
+ </para>
+
+ <para>
+ For more details see the file COPYING in the source
+ distribution of Linux.
+ </para>
+ </legalnotice>
+ </bookinfo>
+
+ <toc></toc>
+ <chapter id="intro">
+ <title>Introduction</title>
+ <para>
+ Tracepoints are static probe points that are located in strategic points
+ throughout the kernel. 'Probes' register/unregister with tracepoints
+ via a callback mechanism. The 'probes' are strictly typed functions that
+ are passed a unique set of parameters defined by each tracepoint.
+ </para>
+
+ <para>
+ From this simple callback mechanism, 'probes' can be used to profile, debug,
+ and understand kernel behavior. There are a number of tools that provide a
+ framework for using 'probes'. These tools include Systemtap, ftrace, and
+ LTTng.
+ </para>
+
+ <para>
+ Tracepoints are defined in a number of header files via various macros. Thus,
+ the purpose of this document is to provide a clear accounting of the available
+ tracepoints. The intention is to understand not only what tracepoints are
+ available but also to understand where future tracepoints might be added.
+ </para>
+
+ <para>
+ The API presented has functions of the form:
+ <function>trace_tracepointname(function parameters)</function>. These are the
+ tracepoints callbacks that are found throughout the code. Registering and
+ unregistering probes with these callback sites is covered in the
+ <filename>Documentation/trace/*</filename> directory.
+ </para>
+ </chapter>
+
+ <chapter id="irq">
+ <title>IRQ</title>
+!Iinclude/trace/events/irq.h
+ </chapter>
+
+</book>
The output of "cat rcu/rcudata" looks as follows:
rcu:
- 0 c=4011 g=4012 pq=1 pqc=4011 qp=0 rpfq=1 rp=3c2a dt=23301/73 dn=2 df=1882 of=0 ri=2126 ql=2 b=10
- 1 c=4011 g=4012 pq=1 pqc=4011 qp=0 rpfq=3 rp=39a6 dt=78073/1 dn=2 df=1402 of=0 ri=1875 ql=46 b=10
- 2 c=4010 g=4010 pq=1 pqc=4010 qp=0 rpfq=-5 rp=1d12 dt=16646/0 dn=2 df=3140 of=0 ri=2080 ql=0 b=10
- 3 c=4012 g=4013 pq=1 pqc=4012 qp=1 rpfq=3 rp=2b50 dt=21159/1 dn=2 df=2230 of=0 ri=1923 ql=72 b=10
- 4 c=4012 g=4013 pq=1 pqc=4012 qp=1 rpfq=3 rp=1644 dt=5783/1 dn=2 df=3348 of=0 ri=2805 ql=7 b=10
- 5 c=4012 g=4013 pq=0 pqc=4011 qp=1 rpfq=3 rp=1aac dt=5879/1 dn=2 df=3140 of=0 ri=2066 ql=10 b=10
- 6 c=4012 g=4013 pq=1 pqc=4012 qp=1 rpfq=3 rp=ed8 dt=5847/1 dn=2 df=3797 of=0 ri=1266 ql=10 b=10
- 7 c=4012 g=4013 pq=1 pqc=4012 qp=1 rpfq=3 rp=1fa2 dt=6199/1 dn=2 df=2795 of=0 ri=2162 ql=28 b=10
+rcu:
+ 0 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=10951/1 dn=0 df=1101 of=0 ri=36 ql=0 b=10
+ 1 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=16117/1 dn=0 df=1015 of=0 ri=0 ql=0 b=10
+ 2 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=1445/1 dn=0 df=1839 of=0 ri=0 ql=0 b=10
+ 3 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=6681/1 dn=0 df=1545 of=0 ri=0 ql=0 b=10
+ 4 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=1003/1 dn=0 df=1992 of=0 ri=0 ql=0 b=10
+ 5 c=17829 g=17830 pq=1 pqc=17829 qp=1 dt=3887/1 dn=0 df=3331 of=0 ri=4 ql=2 b=10
+ 6 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=859/1 dn=0 df=3224 of=0 ri=0 ql=0 b=10
+ 7 c=17829 g=17830 pq=0 pqc=17829 qp=1 dt=3761/1 dn=0 df=1818 of=0 ri=0 ql=2 b=10
rcu_bh:
- 0 c=-268 g=-268 pq=1 pqc=-268 qp=0 rpfq=-145 rp=21d6 dt=23301/73 dn=2 df=0 of=0 ri=0 ql=0 b=10
- 1 c=-268 g=-268 pq=1 pqc=-268 qp=1 rpfq=-170 rp=20ce dt=78073/1 dn=2 df=26 of=0 ri=5 ql=0 b=10
- 2 c=-268 g=-268 pq=1 pqc=-268 qp=1 rpfq=-83 rp=fbd dt=16646/0 dn=2 df=28 of=0 ri=4 ql=0 b=10
- 3 c=-268 g=-268 pq=1 pqc=-268 qp=0 rpfq=-105 rp=178c dt=21159/1 dn=2 df=28 of=0 ri=2 ql=0 b=10
- 4 c=-268 g=-268 pq=1 pqc=-268 qp=1 rpfq=-30 rp=b54 dt=5783/1 dn=2 df=32 of=0 ri=0 ql=0 b=10
- 5 c=-268 g=-268 pq=1 pqc=-268 qp=1 rpfq=-29 rp=df5 dt=5879/1 dn=2 df=30 of=0 ri=3 ql=0 b=10
- 6 c=-268 g=-268 pq=1 pqc=-268 qp=1 rpfq=-28 rp=788 dt=5847/1 dn=2 df=32 of=0 ri=0 ql=0 b=10
- 7 c=-268 g=-268 pq=1 pqc=-268 qp=1 rpfq=-53 rp=1098 dt=6199/1 dn=2 df=30 of=0 ri=3 ql=0 b=10
+ 0 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=10951/1 dn=0 df=0 of=0 ri=0 ql=0 b=10
+ 1 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=16117/1 dn=0 df=13 of=0 ri=0 ql=0 b=10
+ 2 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=1445/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
+ 3 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=6681/1 dn=0 df=9 of=0 ri=0 ql=0 b=10
+ 4 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=1003/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
+ 5 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=3887/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
+ 6 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=859/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
+ 7 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=3761/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
The first section lists the rcu_data structures for rcu, the second for
rcu_bh. Each section has one line per CPU, or eight for this 8-CPU system.
o "qp" indicates that RCU still expects a quiescent state from
this CPU.
-o "rpfq" is the number of rcu_pending() calls on this CPU required
- to induce this CPU to invoke force_quiescent_state().
-
-o "rp" is low-order four hex digits of the count of how many times
- rcu_pending() has been invoked on this CPU.
-
o "dt" is the current value of the dyntick counter that is incremented
when entering or leaving dynticks idle state, either by the
scheduler or by irq. The number after the "/" is the interrupt
of RCU callbacks is ready to invoke, then the remainder will
be deferred.
+There is also an rcu/rcudata.csv file with the same information in
+comma-separated-variable spreadsheet format.
+
The output of "cat rcu/rcugp" looks as follows:
For example, the first entry at the lowest level shows
"^0", indicating that it corresponds to bit zero in
the first entry at the middle level.
+
+
+The output of "cat rcu/rcu_pending" looks as follows:
+
+rcu:
+ 0 np=255892 qsp=53936 cbr=0 cng=14417 gpc=10033 gps=24320 nf=6445 nn=146741
+ 1 np=261224 qsp=54638 cbr=0 cng=25723 gpc=16310 gps=2849 nf=5912 nn=155792
+ 2 np=237496 qsp=49664 cbr=0 cng=2762 gpc=45478 gps=1762 nf=1201 nn=136629
+ 3 np=236249 qsp=48766 cbr=0 cng=286 gpc=48049 gps=1218 nf=207 nn=137723
+ 4 np=221310 qsp=46850 cbr=0 cng=26 gpc=43161 gps=4634 nf=3529 nn=123110
+ 5 np=237332 qsp=48449 cbr=0 cng=54 gpc=47920 gps=3252 nf=201 nn=137456
+ 6 np=219995 qsp=46718 cbr=0 cng=50 gpc=42098 gps=6093 nf=4202 nn=120834
+ 7 np=249893 qsp=49390 cbr=0 cng=72 gpc=38400 gps=17102 nf=41 nn=144888
+rcu_bh:
+ 0 np=146741 qsp=1419 cbr=0 cng=6 gpc=0 gps=0 nf=2 nn=145314
+ 1 np=155792 qsp=12597 cbr=0 cng=0 gpc=4 gps=8 nf=3 nn=143180
+ 2 np=136629 qsp=18680 cbr=0 cng=0 gpc=7 gps=6 nf=0 nn=117936
+ 3 np=137723 qsp=2843 cbr=0 cng=0 gpc=10 gps=7 nf=0 nn=134863
+ 4 np=123110 qsp=12433 cbr=0 cng=0 gpc=4 gps=2 nf=0 nn=110671
+ 5 np=137456 qsp=4210 cbr=0 cng=0 gpc=6 gps=5 nf=0 nn=133235
+ 6 np=120834 qsp=9902 cbr=0 cng=0 gpc=6 gps=3 nf=2 nn=110921
+ 7 np=144888 qsp=26336 cbr=0 cng=0 gpc=8 gps=2 nf=0 nn=118542
+
+As always, this is once again split into "rcu" and "rcu_bh" portions.
+The fields are as follows:
+
+o "np" is the number of times that __rcu_pending() has been invoked
+ for the corresponding flavor of RCU.
+
+o "qsp" is the number of times that the RCU was waiting for a
+ quiescent state from this CPU.
+
+o "cbr" is the number of times that this CPU had RCU callbacks
+ that had passed through a grace period, and were thus ready
+ to be invoked.
+
+o "cng" is the number of times that this CPU needed another
+ grace period while RCU was idle.
+
+o "gpc" is the number of times that an old grace period had
+ completed, but this CPU was not yet aware of it.
+
+o "gps" is the number of times that a new grace period had started,
+ but this CPU was not yet aware of it.
+
+o "nf" is the number of times that this CPU suspected that the
+ current grace period had run for too long, and thus needed to
+ be forced.
+
+ Please note that "forcing" consists of sending resched IPIs
+ to holdout CPUs. If that CPU really still is in an old RCU
+ read-side critical section, then we really do have to wait for it.
+ The assumption behing "forcing" is that the CPU is not still in
+ an old RCU read-side critical section, but has not yet responded
+ for some other reason.
+
+o "nn" is the number of times that this CPU needed nothing. Alert
+ readers will note that the rcu "nn" number for a given CPU very
+ closely matches the rcu_bh "np" number for that same CPU. This
+ is due to short-circuit evaluation in rcu_pending().
--- /dev/null
+Futex Requeue PI
+----------------
+
+Requeueing of tasks from a non-PI futex to a PI futex requires
+special handling in order to ensure the underlying rt_mutex is never
+left without an owner if it has waiters; doing so would break the PI
+boosting logic [see rt-mutex-desgin.txt] For the purposes of
+brevity, this action will be referred to as "requeue_pi" throughout
+this document. Priority inheritance is abbreviated throughout as
+"PI".
+
+Motivation
+----------
+
+Without requeue_pi, the glibc implementation of
+pthread_cond_broadcast() must resort to waking all the tasks waiting
+on a pthread_condvar and letting them try to sort out which task
+gets to run first in classic thundering-herd formation. An ideal
+implementation would wake the highest-priority waiter, and leave the
+rest to the natural wakeup inherent in unlocking the mutex
+associated with the condvar.
+
+Consider the simplified glibc calls:
+
+/* caller must lock mutex */
+pthread_cond_wait(cond, mutex)
+{
+ lock(cond->__data.__lock);
+ unlock(mutex);
+ do {
+ unlock(cond->__data.__lock);
+ futex_wait(cond->__data.__futex);
+ lock(cond->__data.__lock);
+ } while(...)
+ unlock(cond->__data.__lock);
+ lock(mutex);
+}
+
+pthread_cond_broadcast(cond)
+{
+ lock(cond->__data.__lock);
+ unlock(cond->__data.__lock);
+ futex_requeue(cond->data.__futex, cond->mutex);
+}
+
+Once pthread_cond_broadcast() requeues the tasks, the cond->mutex
+has waiters. Note that pthread_cond_wait() attempts to lock the
+mutex only after it has returned to user space. This will leave the
+underlying rt_mutex with waiters, and no owner, breaking the
+previously mentioned PI-boosting algorithms.
+
+In order to support PI-aware pthread_condvar's, the kernel needs to
+be able to requeue tasks to PI futexes. This support implies that
+upon a successful futex_wait system call, the caller would return to
+user space already holding the PI futex. The glibc implementation
+would be modified as follows:
+
+
+/* caller must lock mutex */
+pthread_cond_wait_pi(cond, mutex)
+{
+ lock(cond->__data.__lock);
+ unlock(mutex);
+ do {
+ unlock(cond->__data.__lock);
+ futex_wait_requeue_pi(cond->__data.__futex);
+ lock(cond->__data.__lock);
+ } while(...)
+ unlock(cond->__data.__lock);
+ /* the kernel acquired the the mutex for us */
+}
+
+pthread_cond_broadcast_pi(cond)
+{
+ lock(cond->__data.__lock);
+ unlock(cond->__data.__lock);
+ futex_requeue_pi(cond->data.__futex, cond->mutex);
+}
+
+The actual glibc implementation will likely test for PI and make the
+necessary changes inside the existing calls rather than creating new
+calls for the PI cases. Similar changes are needed for
+pthread_cond_timedwait() and pthread_cond_signal().
+
+Implementation
+--------------
+
+In order to ensure the rt_mutex has an owner if it has waiters, it
+is necessary for both the requeue code, as well as the waiting code,
+to be able to acquire the rt_mutex before returning to user space.
+The requeue code cannot simply wake the waiter and leave it to
+acquire the rt_mutex as it would open a race window between the
+requeue call returning to user space and the waiter waking and
+starting to run. This is especially true in the uncontended case.
+
+The solution involves two new rt_mutex helper routines,
+rt_mutex_start_proxy_lock() and rt_mutex_finish_proxy_lock(), which
+allow the requeue code to acquire an uncontended rt_mutex on behalf
+of the waiter and to enqueue the waiter on a contended rt_mutex.
+Two new system calls provide the kernel<->user interface to
+requeue_pi: FUTEX_WAIT_REQUEUE_PI and FUTEX_REQUEUE_CMP_PI.
+
+FUTEX_WAIT_REQUEUE_PI is called by the waiter (pthread_cond_wait()
+and pthread_cond_timedwait()) to block on the initial futex and wait
+to be requeued to a PI-aware futex. The implementation is the
+result of a high-speed collision between futex_wait() and
+futex_lock_pi(), with some extra logic to check for the additional
+wake-up scenarios.
+
+FUTEX_REQUEUE_CMP_PI is called by the waker
+(pthread_cond_broadcast() and pthread_cond_signal()) to requeue and
+possibly wake the waiting tasks. Internally, this system call is
+still handled by futex_requeue (by passing requeue_pi=1). Before
+requeueing, futex_requeue() attempts to acquire the requeue target
+PI futex on behalf of the top waiter. If it can, this waiter is
+woken. futex_requeue() then proceeds to requeue the remaining
+nr_wake+nr_requeue tasks to the PI futex, calling
+rt_mutex_start_proxy_lock() prior to each requeue to prepare the
+task as a waiter on the underlying rt_mutex. It is possible that
+the lock can be acquired at this stage as well, if so, the next
+waiter is woken to finish the acquisition of the lock.
+
+FUTEX_REQUEUE_PI accepts nr_wake and nr_requeue as arguments, but
+their sum is all that really matters. futex_requeue() will wake or
+requeue up to nr_wake + nr_requeue tasks. It will wake only as many
+tasks as it can acquire the lock for, which in the majority of cases
+should be 0 as good programming practice dictates that the caller of
+either pthread_cond_broadcast() or pthread_cond_signal() acquire the
+mutex prior to making the call. FUTEX_REQUEUE_PI requires that
+nr_wake=1. nr_requeue should be INT_MAX for broadcast and 0 for
+signal.
ISAPNP ISA PnP code is enabled.
ISDN Appropriate ISDN support is enabled.
JOY Appropriate joystick support is enabled.
- KMEMTRACE kmemtrace is enabled.
LIBATA Libata driver is enabled
LP Printer support is enabled.
LOOP Loopback device support is enabled.
flushed before they will be reused, which
is a lot of faster
- amd_iommu_size= [HW,X86-64]
- Define the size of the aperture for the AMD IOMMU
- driver. Possible values are:
- '32M', '64M' (default), '128M', '256M', '512M', '1G'
-
amijoy.map= [HW,JOY] Amiga joystick support
Map of devices attached to JOY0DAT and JOY1DAT
Format: <a>,<b>
DMA-API debugging code disables itself because the
architectural default is too low.
+ dma_debug_driver=<driver_name>
+ With this option the DMA-API debugging driver
+ filter feature can be enabled at boot time. Just
+ pass the driver to filter for as the parameter.
+ The filter can be disabled or changed to another
+ driver later using sysfs.
+
dscc4.setup= [NET]
dtc3181e= [HW,SCSI]
ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
ftrace=[tracer]
- [ftrace] will set and start the specified tracer
+ [FTRACE] will set and start the specified tracer
as early as possible in order to facilitate early
boot debugging.
ftrace_dump_on_oops
- [ftrace] will dump the trace buffers on oops.
+ [FTRACE] will dump the trace buffers on oops.
+
+ ftrace_filter=[function-list]
+ [FTRACE] Limit the functions traced by the function
+ tracer at boot up. function-list is a comma separated
+ list of functions. This list can be changed at run
+ time by the set_ftrace_filter file in the debugfs
+ tracing directory.
+
+ ftrace_notrace=[function-list]
+ [FTRACE] Do not trace the functions specified in
+ function-list. This list can be changed at run time
+ by the set_ftrace_notrace file in the debugfs
+ tracing directory.
gamecon.map[2|3]=
[HW,JOY] Multisystem joystick and NES/SNES/PSX pad
use the HighMem zone if it exists, and the Normal
zone if it does not.
- kmemtrace.enable= [KNL,KMEMTRACE] Format: { yes | no }
- Controls whether kmemtrace is enabled
- at boot-time.
-
- kmemtrace.subbufs=n [KNL,KMEMTRACE] Overrides the number of
- subbufs kmemtrace's relay channel has. Set this
- higher than default (KMEMTRACE_N_SUBBUFS in code) if
- you experience buffer overruns.
-
kgdboc= [HW] kgdb over consoles.
Requires a tty driver that supports console polling.
(only serial suported for now)
noinitrd [RAM] Tells the kernel not to load any configured
initial RAM disk.
+ nointremap [X86-64, Intel-IOMMU] Do not enable interrupt
+ remapping.
+
nointroute [IA-64]
nojitter [IA64] Disables jitter checking for ITC timers.
- Locking functions.
- Interrupt disabling functions.
+ - Sleep and wake-up functions.
- Miscellaneous functions.
(*) Inter-CPU locking barrier effects.
other means.
+SLEEP AND WAKE-UP FUNCTIONS
+---------------------------
+
+Sleeping and waking on an event flagged in global data can be viewed as an
+interaction between two pieces of data: the task state of the task waiting for
+the event and the global data used to indicate the event. To make sure that
+these appear to happen in the right order, the primitives to begin the process
+of going to sleep, and the primitives to initiate a wake up imply certain
+barriers.
+
+Firstly, the sleeper normally follows something like this sequence of events:
+
+ for (;;) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (event_indicated)
+ break;
+ schedule();
+ }
+
+A general memory barrier is interpolated automatically by set_current_state()
+after it has altered the task state:
+
+ CPU 1
+ ===============================
+ set_current_state();
+ set_mb();
+ STORE current->state
+ <general barrier>
+ LOAD event_indicated
+
+set_current_state() may be wrapped by:
+
+ prepare_to_wait();
+ prepare_to_wait_exclusive();
+
+which therefore also imply a general memory barrier after setting the state.
+The whole sequence above is available in various canned forms, all of which
+interpolate the memory barrier in the right place:
+
+ wait_event();
+ wait_event_interruptible();
+ wait_event_interruptible_exclusive();
+ wait_event_interruptible_timeout();
+ wait_event_killable();
+ wait_event_timeout();
+ wait_on_bit();
+ wait_on_bit_lock();
+
+
+Secondly, code that performs a wake up normally follows something like this:
+
+ event_indicated = 1;
+ wake_up(&event_wait_queue);
+
+or:
+
+ event_indicated = 1;
+ wake_up_process(event_daemon);
+
+A write memory barrier is implied by wake_up() and co. if and only if they wake
+something up. The barrier occurs before the task state is cleared, and so sits
+between the STORE to indicate the event and the STORE to set TASK_RUNNING:
+
+ CPU 1 CPU 2
+ =============================== ===============================
+ set_current_state(); STORE event_indicated
+ set_mb(); wake_up();
+ STORE current->state <write barrier>
+ <general barrier> STORE current->state
+ LOAD event_indicated
+
+The available waker functions include:
+
+ complete();
+ wake_up();
+ wake_up_all();
+ wake_up_bit();
+ wake_up_interruptible();
+ wake_up_interruptible_all();
+ wake_up_interruptible_nr();
+ wake_up_interruptible_poll();
+ wake_up_interruptible_sync();
+ wake_up_interruptible_sync_poll();
+ wake_up_locked();
+ wake_up_locked_poll();
+ wake_up_nr();
+ wake_up_poll();
+ wake_up_process();
+
+
+[!] Note that the memory barriers implied by the sleeper and the waker do _not_
+order multiple stores before the wake-up with respect to loads of those stored
+values after the sleeper has called set_current_state(). For instance, if the
+sleeper does:
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (event_indicated)
+ break;
+ __set_current_state(TASK_RUNNING);
+ do_something(my_data);
+
+and the waker does:
+
+ my_data = value;
+ event_indicated = 1;
+ wake_up(&event_wait_queue);
+
+there's no guarantee that the change to event_indicated will be perceived by
+the sleeper as coming after the change to my_data. In such a circumstance, the
+code on both sides must interpolate its own memory barriers between the
+separate data accesses. Thus the above sleeper ought to do:
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (event_indicated) {
+ smp_rmb();
+ do_something(my_data);
+ }
+
+and the waker should do:
+
+ my_data = value;
+ smp_wmb();
+ event_indicated = 1;
+ wake_up(&event_wait_queue);
+
+
MISCELLANEOUS FUNCTIONS
-----------------------
Under normal operation, memory operation reordering is generally not going to
be a problem as a single-threaded linear piece of code will still appear to
-work correctly, even if it's in an SMP kernel. There are, however, three
+work correctly, even if it's in an SMP kernel. There are, however, four
circumstances in which reordering definitely _could_ be a problem:
(*) Interprocessor interaction.
CONTENTS
========
+0. WARNING
1. Overview
1.1 The problem
1.2 The solution
3. Future plans
+0. WARNING
+==========
+
+ Fiddling with these settings can result in an unstable system, the knobs are
+ root only and assumes root knows what he is doing.
+
+Most notable:
+
+ * very small values in sched_rt_period_us can result in an unstable
+ system when the period is smaller than either the available hrtimer
+ resolution, or the time it takes to handle the budget refresh itself.
+
+ * very small values in sched_rt_runtime_us can result in an unstable
+ system when the runtime is so small the system has difficulty making
+ forward progress (NOTE: the migration thread and kstopmachine both
+ are real-time processes).
+
1. Overview
===========
Implementing SCHED_EDF might take a while to complete. Priority Inheritance is
the biggest challenge as the current linux PI infrastructure is geared towards
-the limited static priority levels 0-139. With deadline scheduling you need to
+the limited static priority levels 0-99. With deadline scheduling you need to
do deadline inheritance (since priority is inversely proportional to the
deadline delta (deadline - now).
--- /dev/null
+ Event Tracing
+
+ Documentation written by Theodore Ts'o
+ Updated by Li Zefan
+
+1. Introduction
+===============
+
+Tracepoints (see Documentation/trace/tracepoints.txt) can be used
+without creating custom kernel modules to register probe functions
+using the event tracing infrastructure.
+
+Not all tracepoints can be traced using the event tracing system;
+the kernel developer must provide code snippets which define how the
+tracing information is saved into the tracing buffer, and how the
+tracing information should be printed.
+
+2. Using Event Tracing
+======================
+
+2.1 Via the 'set_event' interface
+---------------------------------
+
+The events which are available for tracing can be found in the file
+/debug/tracing/available_events.
+
+To enable a particular event, such as 'sched_wakeup', simply echo it
+to /debug/tracing/set_event. For example:
+
+ # echo sched_wakeup >> /debug/tracing/set_event
+
+[ Note: '>>' is necessary, otherwise it will firstly disable
+ all the events. ]
+
+To disable an event, echo the event name to the set_event file prefixed
+with an exclamation point:
+
+ # echo '!sched_wakeup' >> /debug/tracing/set_event
+
+To disable all events, echo an empty line to the set_event file:
+
+ # echo > /debug/tracing/set_event
+
+To enable all events, echo '*:*' or '*:' to the set_event file:
+
+ # echo *:* > /debug/tracing/set_event
+
+The events are organized into subsystems, such as ext4, irq, sched,
+etc., and a full event name looks like this: <subsystem>:<event>. The
+subsystem name is optional, but it is displayed in the available_events
+file. All of the events in a subsystem can be specified via the syntax
+"<subsystem>:*"; for example, to enable all irq events, you can use the
+command:
+
+ # echo 'irq:*' > /debug/tracing/set_event
+
+2.2 Via the 'enable' toggle
+---------------------------
+
+The events available are also listed in /debug/tracing/events/ hierarchy
+of directories.
+
+To enable event 'sched_wakeup':
+
+ # echo 1 > /debug/tracing/events/sched/sched_wakeup/enable
+
+To disable it:
+
+ # echo 0 > /debug/tracing/events/sched/sched_wakeup/enable
+
+To enable all events in sched subsystem:
+
+ # echo 1 > /debug/tracing/events/sched/enable
+
+To eanble all events:
+
+ # echo 1 > /debug/tracing/events/enable
+
+When reading one of these enable files, there are four results:
+
+ 0 - all events this file affects are disabled
+ 1 - all events this file affects are enabled
+ X - there is a mixture of events enabled and disabled
+ ? - this file does not affect any event
+
+3. Defining an event-enabled tracepoint
+=======================================
+
+See The example provided in samples/trace_events
+
Function call tracer to trace all kernel functions.
- "function_graph_tracer"
+ "function_graph"
Similar to the function tracer except that the
function tracer probes the functions on their entry
values starting at 100 (nice -20). Below is a quick chart to map
the kernel priority to user land priorities.
- Kernel priority: 0 to 99 ==> user RT priority 99 to 0
- Kernel priority: 100 to 139 ==> user nice -20 to 19
- Kernel priority: 140 ==> idle task priority
+ Kernel Space User Space
+ ===============================================================
+ 0(high) to 98(low) user RT priority 99(high) to 1(low)
+ with SCHED_RR or SCHED_FIFO
+ ---------------------------------------------------------------
+ 99 sched_priority is not used in scheduling
+ decisions(it must be specified as 0)
+ ---------------------------------------------------------------
+ 100(high) to 139(low) user nice -20(high) to 19(low)
+ ---------------------------------------------------------------
+ 140 idle task priority
+ ---------------------------------------------------------------
The task states are:
--- /dev/null
+The power tracer collects detailed information about C-state and P-state
+transitions, instead of just looking at the high-level "average"
+information.
+
+There is a helper script found in scrips/tracing/power.pl in the kernel
+sources which can be used to parse this information and create a
+Scalable Vector Graphics (SVG) picture from the trace data.
+
+To use this tracer:
+
+ echo 0 > /sys/kernel/debug/tracing/tracing_enabled
+ echo power > /sys/kernel/debug/tracing/current_tracer
+ echo 1 > /sys/kernel/debug/tracing/tracing_enabled
+ sleep 1
+ echo 0 > /sys/kernel/debug/tracing/tracing_enabled
+ cat /sys/kernel/debug/tracing/trace | \
+ perl scripts/tracing/power.pl > out.sv
Protocol 2.09: (Kernel 2.6.26) Added a field of 64-bit physical
pointer to single linked list of struct setup_data.
+Protocol 2.10: (Kernel 2.6.31) Added a protocol for relaxed alignment
+ beyond the kernel_alignment added, new init_size and
+ pref_address fields. Added extended boot loader IDs.
+
**** MEMORY LAYOUT
The traditional memory map for the kernel loader, used for Image or
021C/4 2.00+ ramdisk_size initrd size (set by boot loader)
0220/4 2.00+ bootsect_kludge DO NOT USE - for bootsect.S use only
0224/2 2.01+ heap_end_ptr Free memory after setup end
-0226/2 N/A pad1 Unused
+0226/1 2.02+(3 ext_loader_ver Extended boot loader version
+0227/1 2.02+(3 ext_loader_type Extended boot loader ID
0228/4 2.02+ cmd_line_ptr 32-bit pointer to the kernel command line
022C/4 2.03+ ramdisk_max Highest legal initrd address
0230/4 2.05+ kernel_alignment Physical addr alignment required for kernel
0234/1 2.05+ relocatable_kernel Whether kernel is relocatable or not
-0235/1 N/A pad2 Unused
+0235/1 2.10+ min_alignment Minimum alignment, as a power of two
0236/2 N/A pad3 Unused
0238/4 2.06+ cmdline_size Maximum size of the kernel command line
023C/4 2.07+ hardware_subarch Hardware subarchitecture
024C/4 2.08+ payload_length Length of kernel payload
0250/8 2.09+ setup_data 64-bit physical pointer to linked list
of struct setup_data
+0258/8 2.10+ pref_address Preferred loading address
+0260/4 2.10+ init_size Linear memory required during initialization
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
field are unusable, which means the size of a bzImage kernel
cannot be determined.
+(3) Ignored, but safe to set, for boot protocols 2.02-2.09.
+
If the "HdrS" (0x53726448) magic number is not found at offset 0x202,
the boot protocol version is "old". Loading an old kernel, the
following parameters should be assumed:
0xTV here, where T is an identifier for the boot loader and V is
a version number. Otherwise, enter 0xFF here.
+ For boot loader IDs above T = 0xD, write T = 0xE to this field and
+ write the extended ID minus 0x10 to the ext_loader_type field.
+ Similarly, the ext_loader_ver field can be used to provide more than
+ four bits for the bootloader version.
+
+ For example, for T = 0x15, V = 0x234, write:
+
+ type_of_loader <- 0xE4
+ ext_loader_type <- 0x05
+ ext_loader_ver <- 0x23
+
Assigned boot loader ids:
0 LILO (0x00 reserved for pre-2.00 bootloader)
1 Loadlin
2 bootsect-loader (0x20, all other values reserved)
- 3 SYSLINUX
- 4 EtherBoot
+ 3 Syslinux
+ 4 Etherboot/gPXE
5 ELILO
7 GRUB
- 8 U-BOOT
+ 8 U-Boot
9 Xen
A Gujin
B Qemu
+ C Arcturus Networks uCbootloader
+ E Extended (see ext_loader_type)
+ F Special (0xFF = undefined)
Please contact <hpa@zytor.com> if you need a bootloader ID
value assigned.
Set this field to the offset (from the beginning of the real-mode
code) of the end of the setup stack/heap, minus 0x0200.
+Field name: ext_loader_ver
+Type: write (optional)
+Offset/size: 0x226/1
+Protocol: 2.02+
+
+ This field is used as an extension of the version number in the
+ type_of_loader field. The total version number is considered to be
+ (type_of_loader & 0x0f) + (ext_loader_ver << 4).
+
+ The use of this field is boot loader specific. If not written, it
+ is zero.
+
+ Kernels prior to 2.6.31 did not recognize this field, but it is safe
+ to write for protocol version 2.02 or higher.
+
+Field name: ext_loader_type
+Type: write (obligatory if (type_of_loader & 0xf0) == 0xe0)
+Offset/size: 0x227/1
+Protocol: 2.02+
+
+ This field is used as an extension of the type number in
+ type_of_loader field. If the type in type_of_loader is 0xE, then
+ the actual type is (ext_loader_type + 0x10).
+
+ This field is ignored if the type in type_of_loader is not 0xE.
+
+ Kernels prior to 2.6.31 did not recognize this field, but it is safe
+ to write for protocol version 2.02 or higher.
+
Field name: cmd_line_ptr
Type: write (obligatory)
Offset/size: 0x228/4
0x37FFFFFF, you can start your ramdisk at 0x37FE0000.)
Field name: kernel_alignment
-Type: read (reloc)
+Type: read/modify (reloc)
Offset/size: 0x230/4
-Protocol: 2.05+
+Protocol: 2.05+ (read), 2.10+ (modify)
+
+ Alignment unit required by the kernel (if relocatable_kernel is
+ true.) A relocatable kernel that is loaded at an alignment
+ incompatible with the value in this field will be realigned during
+ kernel initialization.
- Alignment unit required by the kernel (if relocatable_kernel is true.)
+ Starting with protocol version 2.10, this reflects the kernel
+ alignment preferred for optimal performance; it is possible for the
+ loader to modify this field to permit a lesser alignment. See the
+ min_alignment and pref_address field below.
Field name: relocatable_kernel
Type: read (reloc)
After loading, the boot loader must set the code32_start field to
point to the loaded code, or to a boot loader hook.
+Field name: min_alignment
+Type: read (reloc)
+Offset/size: 0x235/1
+Protocol: 2.10+
+
+ This field, if nonzero, indicates as a power of two the minimum
+ alignment required, as opposed to preferred, by the kernel to boot.
+ If a boot loader makes use of this field, it should update the
+ kernel_alignment field with the alignment unit desired; typically:
+
+ kernel_alignment = 1 << min_alignment
+
+ There may be a considerable performance cost with an excessively
+ misaligned kernel. Therefore, a loader should typically try each
+ power-of-two alignment from kernel_alignment down to this alignment.
+
Field name: cmdline_size
Type: read
Offset/size: 0x238/4
sure to consider the case where the linked list already contains
entries.
+Field name: pref_address
+Type: read (reloc)
+Offset/size: 0x258/8
+Protocol: 2.10+
+
+ This field, if nonzero, represents a preferred load address for the
+ kernel. A relocating bootloader should attempt to load at this
+ address if possible.
+
+ A non-relocatable kernel will unconditionally move itself and to run
+ at this address.
+
+Field name: init_size
+Type: read
+Offset/size: 0x25c/4
+
+ This field indicates the amount of linear contiguous memory starting
+ at the kernel runtime start address that the kernel needs before it
+ is capable of examining its memory map. This is not the same thing
+ as the total amount of memory the kernel needs to boot, but it can
+ be used by a relocating boot loader to help select a safe load
+ address for the kernel.
+
+ The kernel runtime start address is determined by the following algorithm:
+
+ if (relocatable_kernel)
+ runtime_start = align_up(load_address, kernel_alignment)
+ else
+ runtime_start = pref_address
+
**** THE IMAGE CHECKSUM
Otherwise, the remaining system RAM is allocated to an
additional node.
- numa=hotadd=percent
- Only allow hotadd memory to preallocate page structures upto
- percent of already available memory.
- numa=hotadd=0 will disable hotadd memory.
-
ACPI
acpi=off Don't enable ACPI
0000000000000000 - 00007fffffffffff (=47 bits) user space, different per mm
hole caused by [48:63] sign extension
ffff800000000000 - ffff80ffffffffff (=40 bits) guard hole
-ffff880000000000 - ffffc0ffffffffff (=57 TB) direct mapping of all phys. memory
-ffffc10000000000 - ffffc1ffffffffff (=40 bits) hole
-ffffc20000000000 - ffffe1ffffffffff (=45 bits) vmalloc/ioremap space
-ffffe20000000000 - ffffe2ffffffffff (=40 bits) virtual memory map (1TB)
+ffff880000000000 - ffffc7ffffffffff (=64 TB) direct mapping of all phys. memory
+ffffc80000000000 - ffffc8ffffffffff (=40 bits) hole
+ffffc90000000000 - ffffe8ffffffffff (=45 bits) vmalloc/ioremap space
+ffffe90000000000 - ffffe9ffffffffff (=40 bits) hole
+ffffea0000000000 - ffffeaffffffffff (=40 bits) virtual memory map (1TB)
... unused hole ...
ffffffff80000000 - ffffffffa0000000 (=512 MB) kernel text mapping, from phys 0
ffffffffa0000000 - fffffffffff00000 (=1536 MB) module mapping space
F: include/linux/delayacct.h
F: kernel/delayacct.c
+PERFORMANCE COUNTER SUBSYSTEM
+P: Peter Zijlstra
+M: a.p.zijlstra@chello.nl
+P: Paul Mackerras
+M: paulus@samba.org
+P: Ingo Molnar
+M: mingo@elte.hu
+L: linux-kernel@vger.kernel.org
+S: Supported
+
PERSONALITY HANDLING
P: Christoph Hellwig
M: hch@infradead.org
}
}
-static void
+static int
dp264_set_affinity(unsigned int irq, const struct cpumask *affinity)
{
spin_lock(&dp264_irq_lock);
cpu_set_irq_affinity(irq, *affinity);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
+
+ return 0;
}
-static void
+static int
clipper_set_affinity(unsigned int irq, const struct cpumask *affinity)
{
spin_lock(&dp264_irq_lock);
cpu_set_irq_affinity(irq - 16, *affinity);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
+
+ return 0;
}
static struct hw_interrupt_type dp264_irq_type = {
}
-static void
+static int
titan_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
{
spin_lock(&titan_irq_lock);
titan_cpu_set_irq_affinity(irq - 16, *affinity);
titan_update_irq_hw(titan_cached_irq_mask);
spin_unlock(&titan_irq_lock);
+
+ return 0;
}
static void
}
#ifdef CONFIG_SMP
-static void gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
+static int gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
{
void __iomem *reg = gic_dist_base(irq) + GIC_DIST_TARGET + (gic_irq(irq) & ~3);
unsigned int shift = (irq % 4) * 8;
val |= 1 << (cpu + shift);
writel(val, reg);
spin_unlock(&irq_controller_lock);
+
+ return 0;
}
#endif
{
}
-void set_affinity_crisv32_irq(unsigned int irq, const struct cpumask *dest)
+int set_affinity_crisv32_irq(unsigned int irq, const struct cpumask *dest)
{
unsigned long flags;
spin_lock_irqsave(&irq_lock, flags);
irq_allocations[irq - FIRST_IRQ].mask = *dest;
spin_unlock_irqrestore(&irq_lock, flags);
+
+ return 0;
}
static struct irq_chip crisv32_irq_type = {
{
}
-static void
+static int
hpsim_set_affinity_noop(unsigned int a, const struct cpumask *b)
{
+ return 0;
}
static struct hw_interrupt_type irq_type_hp_sim = {
* success: return IRQ number (>=0)
* failure: return < 0
*/
-int acpi_register_gsi(u32 gsi, int triggering, int polarity)
+int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
{
if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
return gsi;
fadt = (struct acpi_table_fadt *)fadt_header;
- acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
+ acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
+ ACPI_ACTIVE_LOW);
return 0;
}
}
-static void
+static int
iosapic_set_affinity(unsigned int irq, const struct cpumask *mask)
{
#ifdef CONFIG_SMP
cpu = cpumask_first_and(cpu_online_mask, mask);
if (cpu >= nr_cpu_ids)
- return;
+ return -1;
if (irq_prepare_move(irq, cpu))
- return;
+ return -1;
dest = cpu_physical_id(cpu);
if (!iosapic_intr_info[irq].count)
- return; /* not an IOSAPIC interrupt */
+ return -1; /* not an IOSAPIC interrupt */
set_irq_affinity_info(irq, dest, redir);
iosapic_write(iosapic, IOSAPIC_RTE_HIGH(rte_index), high32);
iosapic_write(iosapic, IOSAPIC_RTE_LOW(rte_index), low32);
}
+
#endif
+ return 0;
}
/*
static struct irq_chip ia64_msi_chip;
#ifdef CONFIG_SMP
-static void ia64_set_msi_irq_affinity(unsigned int irq,
+static int ia64_set_msi_irq_affinity(unsigned int irq,
const cpumask_t *cpu_mask)
{
struct msi_msg msg;
int cpu = first_cpu(*cpu_mask);
if (!cpu_online(cpu))
- return;
+ return -1;
if (irq_prepare_move(irq, cpu))
- return;
+ return -1;
read_msi_msg(irq, &msg);
write_msi_msg(irq, &msg);
cpumask_copy(irq_desc[irq].affinity, cpumask_of(cpu));
+
+ return 0;
}
#endif /* CONFIG_SMP */
#ifdef CONFIG_DMAR
#ifdef CONFIG_SMP
-static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
{
struct irq_cfg *cfg = irq_cfg + irq;
struct msi_msg msg;
int cpu = cpumask_first(mask);
if (!cpu_online(cpu))
- return;
+ return -1;
if (irq_prepare_move(irq, cpu))
- return;
+ return -1;
dmar_msi_read(irq, &msg);
dmar_msi_write(irq, &msg);
cpumask_copy(irq_desc[irq].affinity, mask);
+
+ return 0;
}
#endif /* CONFIG_SMP */
return new_irq_info;
}
-static void sn_set_affinity_irq(unsigned int irq, const struct cpumask *mask)
+static int sn_set_affinity_irq(unsigned int irq, const struct cpumask *mask)
{
struct sn_irq_info *sn_irq_info, *sn_irq_info_safe;
nasid_t nasid;
list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe,
sn_irq_lh[irq], list)
(void)sn_retarget_vector(sn_irq_info, nasid, slice);
+
+ return 0;
}
#ifdef CONFIG_SMP
}
#ifdef CONFIG_SMP
-static void sn_set_msi_irq_affinity(unsigned int irq,
+static int sn_set_msi_irq_affinity(unsigned int irq,
const struct cpumask *cpu_mask)
{
struct msi_msg msg;
cpu = cpumask_first(cpu_mask);
sn_irq_info = sn_msi_info[irq].sn_irq_info;
if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
- return;
+ return -1;
/*
* Release XIO resources for the old MSI PCI address
new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice);
sn_msi_info[irq].sn_irq_info = new_irq_info;
if (new_irq_info == NULL)
- return;
+ return -1;
/*
* Map the xio address into bus space
write_msi_msg(irq, &msg);
cpumask_copy(irq_desc[irq].affinity, cpu_mask);
+
+ return 0;
}
#endif /* CONFIG_SMP */
}
#ifdef CONFIG_SMP
-static void octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest)
+static int octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest)
{
int cpu;
int bit = irq - OCTEON_IRQ_WORKQ0; /* Bit 0-63 of EN0 */
*/
cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2));
write_unlock(&octeon_irq_ciu0_rwlock);
+
+ return 0;
}
#endif
}
#ifdef CONFIG_SMP
-static void octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest)
+static int octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest)
{
int cpu;
int bit = irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */
*/
cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1));
write_unlock(&octeon_irq_ciu1_rwlock);
+
+ return 0;
}
#endif
#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF
#include <linux/cpumask.h>
-extern void plat_set_irq_affinity(unsigned int irq,
+extern int plat_set_irq_affinity(unsigned int irq,
const struct cpumask *affinity);
extern void smtc_forward_irq(unsigned int irq);
static DEFINE_SPINLOCK(gic_lock);
-static void gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
+static int gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
{
cpumask_t tmp = CPU_MASK_NONE;
unsigned long flags;
cpumask_and(&tmp, cpumask, cpu_online_mask);
if (cpus_empty(tmp))
- return;
+ return -1;
/* Assumption : cpumask refers to a single CPU */
spin_lock_irqsave(&gic_lock, flags);
cpumask_copy(irq_desc[irq].affinity, cpumask);
spin_unlock_irqrestore(&gic_lock, flags);
+ return 0;
}
#endif
*/
-void plat_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
+int plat_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
{
cpumask_t tmask;
int cpu = 0;
/* Do any generic SMTC IRQ affinity setup */
smtc_set_irq_affinity(irq, tmask);
+
+ return 0;
}
#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */
static void disable_bcm1480_irq(unsigned int irq);
static void ack_bcm1480_irq(unsigned int irq);
#ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask);
+static int bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask);
#endif
#ifdef CONFIG_PCI
}
#ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
{
int i = 0, old_cpu, cpu, int_on, k;
u64 cur_ints;
if (cpumask_weight(mask) != 1) {
printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
- return;
+ return -1;
}
i = cpumask_first(mask);
}
}
spin_unlock_irqrestore(&bcm1480_imr_lock, flags);
+
+ return 0;
}
#endif
static void disable_sb1250_irq(unsigned int irq);
static void ack_sb1250_irq(unsigned int irq);
#ifdef CONFIG_SMP
-static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask);
+static int sb1250_set_affinity(unsigned int irq, const struct cpumask *mask);
#endif
#ifdef CONFIG_SIBYTE_HAS_LDT
}
#ifdef CONFIG_SMP
-static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int sb1250_set_affinity(unsigned int irq, const struct cpumask *mask)
{
int i = 0, old_cpu, cpu, int_on;
u64 cur_ints;
if (cpumask_weight(mask) > 1) {
printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
- return;
+ return -1;
}
/* Convert logical CPU to physical CPU */
R_IMR_INTERRUPT_MASK));
}
spin_unlock_irqrestore(&sb1250_imr_lock, flags);
+
+ return 0;
}
#endif
return cpu_dest;
}
-static void cpu_set_affinity_irq(unsigned int irq, const struct cpumask *dest)
+static int cpu_set_affinity_irq(unsigned int irq, const struct cpumask *dest)
{
int cpu_dest;
cpu_dest = cpu_check_affinity(irq, dest);
if (cpu_dest < 0)
- return;
+ return -1;
cpumask_copy(&irq_desc[irq].affinity, dest);
+
+ return 0;
}
#endif
*/
struct irq_chip;
+#ifdef CONFIG_PERF_COUNTERS
+static inline unsigned long test_perf_counter_pending(void)
+{
+ unsigned long x;
+
+ asm volatile("lbz %0,%1(13)"
+ : "=r" (x)
+ : "i" (offsetof(struct paca_struct, perf_counter_pending)));
+ return x;
+}
+
+static inline void set_perf_counter_pending(void)
+{
+ asm volatile("stb %0,%1(13)" : :
+ "r" (1),
+ "i" (offsetof(struct paca_struct, perf_counter_pending)));
+}
+
+static inline void clear_perf_counter_pending(void)
+{
+ asm volatile("stb %0,%1(13)" : :
+ "r" (0),
+ "i" (offsetof(struct paca_struct, perf_counter_pending)));
+}
+
+extern void perf_counter_do_pending(void);
+
+#else
+
+static inline unsigned long test_perf_counter_pending(void)
+{
+ return 0;
+}
+
+static inline void set_perf_counter_pending(void) {}
+static inline void clear_perf_counter_pending(void) {}
+static inline void perf_counter_do_pending(void) {}
+#endif /* CONFIG_PERF_COUNTERS */
+
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_HW_IRQ_H */
u8 soft_enabled; /* irq soft-enable flag */
u8 hard_enabled; /* set if irqs are enabled in MSR */
u8 io_sync; /* writel() needs spin_unlock sync */
+ u8 perf_counter_pending; /* PM interrupt while soft-disabled */
/* Stuff for accurate time accounting */
u64 user_time; /* accumulated usermode TB ticks */
--- /dev/null
+/*
+ * Performance counter support - PowerPC-specific definitions.
+ *
+ * Copyright 2008-2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/types.h>
+
+#define MAX_HWCOUNTERS 8
+#define MAX_EVENT_ALTERNATIVES 8
+#define MAX_LIMITED_HWCOUNTERS 2
+
+/*
+ * This struct provides the constants and functions needed to
+ * describe the PMU on a particular POWER-family CPU.
+ */
+struct power_pmu {
+ int n_counter;
+ int max_alternatives;
+ u64 add_fields;
+ u64 test_adder;
+ int (*compute_mmcr)(u64 events[], int n_ev,
+ unsigned int hwc[], u64 mmcr[]);
+ int (*get_constraint)(u64 event, u64 *mskp, u64 *valp);
+ int (*get_alternatives)(u64 event, unsigned int flags,
+ u64 alt[]);
+ void (*disable_pmc)(unsigned int pmc, u64 mmcr[]);
+ int (*limited_pmc_event)(u64 event);
+ u32 flags;
+ int n_generic;
+ int *generic_events;
+ int (*cache_events)[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX];
+};
+
+extern struct power_pmu *ppmu;
+
+/*
+ * Values for power_pmu.flags
+ */
+#define PPMU_LIMITED_PMC5_6 1 /* PMC5/6 have limited function */
+#define PPMU_ALT_SIPR 2 /* uses alternate posn for SIPR/HV */
+
+/*
+ * Values for flags to get_alternatives()
+ */
+#define PPMU_LIMITED_PMC_OK 1 /* can put this on a limited PMC */
+#define PPMU_LIMITED_PMC_REQD 2 /* have to put this on a limited PMC */
+#define PPMU_ONLY_COUNT_RUN 4 /* only counting in run state */
+
+struct pt_regs;
+extern unsigned long perf_misc_flags(struct pt_regs *regs);
+#define perf_misc_flags(regs) perf_misc_flags(regs)
+
+extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
+
+/*
+ * The power_pmu.get_constraint function returns a 64-bit value and
+ * a 64-bit mask that express the constraints between this event and
+ * other events.
+ *
+ * The value and mask are divided up into (non-overlapping) bitfields
+ * of three different types:
+ *
+ * Select field: this expresses the constraint that some set of bits
+ * in MMCR* needs to be set to a specific value for this event. For a
+ * select field, the mask contains 1s in every bit of the field, and
+ * the value contains a unique value for each possible setting of the
+ * MMCR* bits. The constraint checking code will ensure that two events
+ * that set the same field in their masks have the same value in their
+ * value dwords.
+ *
+ * Add field: this expresses the constraint that there can be at most
+ * N events in a particular class. A field of k bits can be used for
+ * N <= 2^(k-1) - 1. The mask has the most significant bit of the field
+ * set (and the other bits 0), and the value has only the least significant
+ * bit of the field set. In addition, the 'add_fields' and 'test_adder'
+ * in the struct power_pmu for this processor come into play. The
+ * add_fields value contains 1 in the LSB of the field, and the
+ * test_adder contains 2^(k-1) - 1 - N in the field.
+ *
+ * NAND field: this expresses the constraint that you may not have events
+ * in all of a set of classes. (For example, on PPC970, you can't select
+ * events from the FPU, ISU and IDU simultaneously, although any two are
+ * possible.) For N classes, the field is N+1 bits wide, and each class
+ * is assigned one bit from the least-significant N bits. The mask has
+ * only the most-significant bit set, and the value has only the bit
+ * for the event's class set. The test_adder has the least significant
+ * bit set in the field.
+ *
+ * If an event is not subject to the constraint expressed by a particular
+ * field, then it will have 0 in both the mask and value for that field.
+ */
#define MMCR0_FCHV 0x00000001UL /* freeze conditions in hypervisor mode */
#define SPRN_MMCR1 798
#define SPRN_MMCRA 0x312
+#define MMCRA_SDSYNC 0x80000000UL /* SDAR synced with SIAR */
#define MMCRA_SIHV 0x10000000UL /* state of MSR HV when SIAR set */
#define MMCRA_SIPR 0x08000000UL /* state of MSR PR when SIAR set */
#define MMCRA_SLOT 0x07000000UL /* SLOT bits (37-39) */
#define MMCRA_SLOT_SHIFT 24
#define MMCRA_SAMPLE_ENABLE 0x00000001UL /* enable sampling */
+#define POWER6_MMCRA_SDSYNC 0x0000080000000000ULL /* SDAR/SIAR synced */
#define POWER6_MMCRA_SIHV 0x0000040000000000ULL
#define POWER6_MMCRA_SIPR 0x0000020000000000ULL
#define POWER6_MMCRA_THRM 0x00000020UL
SYSCALL_SPU(dup3)
SYSCALL_SPU(pipe2)
SYSCALL(inotify_init1)
-SYSCALL(ni_syscall)
+SYSCALL_SPU(perf_counter_open)
COMPAT_SYS_SPU(preadv)
COMPAT_SYS_SPU(pwritev)
#define __NR_dup3 316
#define __NR_pipe2 317
#define __NR_inotify_init1 318
+#define __NR_perf_counter_open 319
#define __NR_preadv 320
#define __NR_pwritev 321
obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
+obj-$(CONFIG_PERF_COUNTERS) += perf_counter.o power4-pmu.o ppc970-pmu.o \
+ power5-pmu.o power5+-pmu.o power6-pmu.o \
+ power7-pmu.o
obj-$(CONFIG_8XX_MINIMAL_FPEMU) += softemu8xx.o
DEFINE(PACAKMSR, offsetof(struct paca_struct, kernel_msr));
DEFINE(PACASOFTIRQEN, offsetof(struct paca_struct, soft_enabled));
DEFINE(PACAHARDIRQEN, offsetof(struct paca_struct, hard_enabled));
+ DEFINE(PACAPERFPEND, offsetof(struct paca_struct, perf_counter_pending));
DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
2:
TRACE_AND_RESTORE_IRQ(r5);
+#ifdef CONFIG_PERF_COUNTERS
+ /* check paca->perf_counter_pending if we're enabling ints */
+ lbz r3,PACAPERFPEND(r13)
+ and. r3,r3,r5
+ beq 27f
+ bl .perf_counter_do_pending
+27:
+#endif /* CONFIG_PERF_COUNTERS */
+
/* extract EE bit and use it to restore paca->hard_enabled */
ld r3,_MSR(r1)
rldicl r4,r3,49,63 /* r0 = (r3 >> 15) & 1 */
iseries_handle_interrupts();
}
+ if (test_perf_counter_pending()) {
+ clear_perf_counter_pending();
+ perf_counter_do_pending();
+ }
+
/*
* if (get_paca()->hard_enabled) return;
* But again we need to take care that gcc gets hard_enabled directly
--- /dev/null
+/*
+ * Performance counter support - powerpc architecture code
+ *
+ * Copyright 2008-2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/perf_counter.h>
+#include <linux/percpu.h>
+#include <linux/hardirq.h>
+#include <asm/reg.h>
+#include <asm/pmc.h>
+#include <asm/machdep.h>
+#include <asm/firmware.h>
+#include <asm/ptrace.h>
+
+struct cpu_hw_counters {
+ int n_counters;
+ int n_percpu;
+ int disabled;
+ int n_added;
+ int n_limited;
+ u8 pmcs_enabled;
+ struct perf_counter *counter[MAX_HWCOUNTERS];
+ u64 events[MAX_HWCOUNTERS];
+ unsigned int flags[MAX_HWCOUNTERS];
+ u64 mmcr[3];
+ struct perf_counter *limited_counter[MAX_LIMITED_HWCOUNTERS];
+ u8 limited_hwidx[MAX_LIMITED_HWCOUNTERS];
+};
+DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters);
+
+struct power_pmu *ppmu;
+
+/*
+ * Normally, to ignore kernel events we set the FCS (freeze counters
+ * in supervisor mode) bit in MMCR0, but if the kernel runs with the
+ * hypervisor bit set in the MSR, or if we are running on a processor
+ * where the hypervisor bit is forced to 1 (as on Apple G5 processors),
+ * then we need to use the FCHV bit to ignore kernel events.
+ */
+static unsigned int freeze_counters_kernel = MMCR0_FCS;
+
+static void perf_counter_interrupt(struct pt_regs *regs);
+
+void perf_counter_print_debug(void)
+{
+}
+
+/*
+ * Read one performance monitor counter (PMC).
+ */
+static unsigned long read_pmc(int idx)
+{
+ unsigned long val;
+
+ switch (idx) {
+ case 1:
+ val = mfspr(SPRN_PMC1);
+ break;
+ case 2:
+ val = mfspr(SPRN_PMC2);
+ break;
+ case 3:
+ val = mfspr(SPRN_PMC3);
+ break;
+ case 4:
+ val = mfspr(SPRN_PMC4);
+ break;
+ case 5:
+ val = mfspr(SPRN_PMC5);
+ break;
+ case 6:
+ val = mfspr(SPRN_PMC6);
+ break;
+ case 7:
+ val = mfspr(SPRN_PMC7);
+ break;
+ case 8:
+ val = mfspr(SPRN_PMC8);
+ break;
+ default:
+ printk(KERN_ERR "oops trying to read PMC%d\n", idx);
+ val = 0;
+ }
+ return val;
+}
+
+/*
+ * Write one PMC.
+ */
+static void write_pmc(int idx, unsigned long val)
+{
+ switch (idx) {
+ case 1:
+ mtspr(SPRN_PMC1, val);
+ break;
+ case 2:
+ mtspr(SPRN_PMC2, val);
+ break;
+ case 3:
+ mtspr(SPRN_PMC3, val);
+ break;
+ case 4:
+ mtspr(SPRN_PMC4, val);
+ break;
+ case 5:
+ mtspr(SPRN_PMC5, val);
+ break;
+ case 6:
+ mtspr(SPRN_PMC6, val);
+ break;
+ case 7:
+ mtspr(SPRN_PMC7, val);
+ break;
+ case 8:
+ mtspr(SPRN_PMC8, val);
+ break;
+ default:
+ printk(KERN_ERR "oops trying to write PMC%d\n", idx);
+ }
+}
+
+/*
+ * Check if a set of events can all go on the PMU at once.
+ * If they can't, this will look at alternative codes for the events
+ * and see if any combination of alternative codes is feasible.
+ * The feasible set is returned in event[].
+ */
+static int power_check_constraints(u64 event[], unsigned int cflags[],
+ int n_ev)
+{
+ u64 mask, value, nv;
+ u64 alternatives[MAX_HWCOUNTERS][MAX_EVENT_ALTERNATIVES];
+ u64 amasks[MAX_HWCOUNTERS][MAX_EVENT_ALTERNATIVES];
+ u64 avalues[MAX_HWCOUNTERS][MAX_EVENT_ALTERNATIVES];
+ u64 smasks[MAX_HWCOUNTERS], svalues[MAX_HWCOUNTERS];
+ int n_alt[MAX_HWCOUNTERS], choice[MAX_HWCOUNTERS];
+ int i, j;
+ u64 addf = ppmu->add_fields;
+ u64 tadd = ppmu->test_adder;
+
+ if (n_ev > ppmu->n_counter)
+ return -1;
+
+ /* First see if the events will go on as-is */
+ for (i = 0; i < n_ev; ++i) {
+ if ((cflags[i] & PPMU_LIMITED_PMC_REQD)
+ && !ppmu->limited_pmc_event(event[i])) {
+ ppmu->get_alternatives(event[i], cflags[i],
+ alternatives[i]);
+ event[i] = alternatives[i][0];
+ }
+ if (ppmu->get_constraint(event[i], &amasks[i][0],
+ &avalues[i][0]))
+ return -1;
+ }
+ value = mask = 0;
+ for (i = 0; i < n_ev; ++i) {
+ nv = (value | avalues[i][0]) + (value & avalues[i][0] & addf);
+ if ((((nv + tadd) ^ value) & mask) != 0 ||
+ (((nv + tadd) ^ avalues[i][0]) & amasks[i][0]) != 0)
+ break;
+ value = nv;
+ mask |= amasks[i][0];
+ }
+ if (i == n_ev)
+ return 0; /* all OK */
+
+ /* doesn't work, gather alternatives... */
+ if (!ppmu->get_alternatives)
+ return -1;
+ for (i = 0; i < n_ev; ++i) {
+ choice[i] = 0;
+ n_alt[i] = ppmu->get_alternatives(event[i], cflags[i],
+ alternatives[i]);
+ for (j = 1; j < n_alt[i]; ++j)
+ ppmu->get_constraint(alternatives[i][j],
+ &amasks[i][j], &avalues[i][j]);
+ }
+
+ /* enumerate all possibilities and see if any will work */
+ i = 0;
+ j = -1;
+ value = mask = nv = 0;
+ while (i < n_ev) {
+ if (j >= 0) {
+ /* we're backtracking, restore context */
+ value = svalues[i];
+ mask = smasks[i];
+ j = choice[i];
+ }
+ /*
+ * See if any alternative k for event i,
+ * where k > j, will satisfy the constraints.
+ */
+ while (++j < n_alt[i]) {
+ nv = (value | avalues[i][j]) +
+ (value & avalues[i][j] & addf);
+ if ((((nv + tadd) ^ value) & mask) == 0 &&
+ (((nv + tadd) ^ avalues[i][j])
+ & amasks[i][j]) == 0)
+ break;
+ }
+ if (j >= n_alt[i]) {
+ /*
+ * No feasible alternative, backtrack
+ * to event i-1 and continue enumerating its
+ * alternatives from where we got up to.
+ */
+ if (--i < 0)
+ return -1;
+ } else {
+ /*
+ * Found a feasible alternative for event i,
+ * remember where we got up to with this event,
+ * go on to the next event, and start with
+ * the first alternative for it.
+ */
+ choice[i] = j;
+ svalues[i] = value;
+ smasks[i] = mask;
+ value = nv;
+ mask |= amasks[i][j];
+ ++i;
+ j = -1;
+ }
+ }
+
+ /* OK, we have a feasible combination, tell the caller the solution */
+ for (i = 0; i < n_ev; ++i)
+ event[i] = alternatives[i][choice[i]];
+ return 0;
+}
+
+/*
+ * Check if newly-added counters have consistent settings for
+ * exclude_{user,kernel,hv} with each other and any previously
+ * added counters.
+ */
+static int check_excludes(struct perf_counter **ctrs, unsigned int cflags[],
+ int n_prev, int n_new)
+{
+ int eu = 0, ek = 0, eh = 0;
+ int i, n, first;
+ struct perf_counter *counter;
+
+ n = n_prev + n_new;
+ if (n <= 1)
+ return 0;
+
+ first = 1;
+ for (i = 0; i < n; ++i) {
+ if (cflags[i] & PPMU_LIMITED_PMC_OK) {
+ cflags[i] &= ~PPMU_LIMITED_PMC_REQD;
+ continue;
+ }
+ counter = ctrs[i];
+ if (first) {
+ eu = counter->attr.exclude_user;
+ ek = counter->attr.exclude_kernel;
+ eh = counter->attr.exclude_hv;
+ first = 0;
+ } else if (counter->attr.exclude_user != eu ||
+ counter->attr.exclude_kernel != ek ||
+ counter->attr.exclude_hv != eh) {
+ return -EAGAIN;
+ }
+ }
+
+ if (eu || ek || eh)
+ for (i = 0; i < n; ++i)
+ if (cflags[i] & PPMU_LIMITED_PMC_OK)
+ cflags[i] |= PPMU_LIMITED_PMC_REQD;
+
+ return 0;
+}
+
+static void power_pmu_read(struct perf_counter *counter)
+{
+ long val, delta, prev;
+
+ if (!counter->hw.idx)
+ return;
+ /*
+ * Performance monitor interrupts come even when interrupts
+ * are soft-disabled, as long as interrupts are hard-enabled.
+ * Therefore we treat them like NMIs.
+ */
+ do {
+ prev = atomic64_read(&counter->hw.prev_count);
+ barrier();
+ val = read_pmc(counter->hw.idx);
+ } while (atomic64_cmpxchg(&counter->hw.prev_count, prev, val) != prev);
+
+ /* The counters are only 32 bits wide */
+ delta = (val - prev) & 0xfffffffful;
+ atomic64_add(delta, &counter->count);
+ atomic64_sub(delta, &counter->hw.period_left);
+}
+
+/*
+ * On some machines, PMC5 and PMC6 can't be written, don't respect
+ * the freeze conditions, and don't generate interrupts. This tells
+ * us if `counter' is using such a PMC.
+ */
+static int is_limited_pmc(int pmcnum)
+{
+ return (ppmu->flags & PPMU_LIMITED_PMC5_6)
+ && (pmcnum == 5 || pmcnum == 6);
+}
+
+static void freeze_limited_counters(struct cpu_hw_counters *cpuhw,
+ unsigned long pmc5, unsigned long pmc6)
+{
+ struct perf_counter *counter;
+ u64 val, prev, delta;
+ int i;
+
+ for (i = 0; i < cpuhw->n_limited; ++i) {
+ counter = cpuhw->limited_counter[i];
+ if (!counter->hw.idx)
+ continue;
+ val = (counter->hw.idx == 5) ? pmc5 : pmc6;
+ prev = atomic64_read(&counter->hw.prev_count);
+ counter->hw.idx = 0;
+ delta = (val - prev) & 0xfffffffful;
+ atomic64_add(delta, &counter->count);
+ }
+}
+
+static void thaw_limited_counters(struct cpu_hw_counters *cpuhw,
+ unsigned long pmc5, unsigned long pmc6)
+{
+ struct perf_counter *counter;
+ u64 val;
+ int i;
+
+ for (i = 0; i < cpuhw->n_limited; ++i) {
+ counter = cpuhw->limited_counter[i];
+ counter->hw.idx = cpuhw->limited_hwidx[i];
+ val = (counter->hw.idx == 5) ? pmc5 : pmc6;
+ atomic64_set(&counter->hw.prev_count, val);
+ perf_counter_update_userpage(counter);
+ }
+}
+
+/*
+ * Since limited counters don't respect the freeze conditions, we
+ * have to read them immediately after freezing or unfreezing the
+ * other counters. We try to keep the values from the limited
+ * counters as consistent as possible by keeping the delay (in
+ * cycles and instructions) between freezing/unfreezing and reading
+ * the limited counters as small and consistent as possible.
+ * Therefore, if any limited counters are in use, we read them
+ * both, and always in the same order, to minimize variability,
+ * and do it inside the same asm that writes MMCR0.
+ */
+static void write_mmcr0(struct cpu_hw_counters *cpuhw, unsigned long mmcr0)
+{
+ unsigned long pmc5, pmc6;
+
+ if (!cpuhw->n_limited) {
+ mtspr(SPRN_MMCR0, mmcr0);
+ return;
+ }
+
+ /*
+ * Write MMCR0, then read PMC5 and PMC6 immediately.
+ * To ensure we don't get a performance monitor interrupt
+ * between writing MMCR0 and freezing/thawing the limited
+ * counters, we first write MMCR0 with the counter overflow
+ * interrupt enable bits turned off.
+ */
+ asm volatile("mtspr %3,%2; mfspr %0,%4; mfspr %1,%5"
+ : "=&r" (pmc5), "=&r" (pmc6)
+ : "r" (mmcr0 & ~(MMCR0_PMC1CE | MMCR0_PMCjCE)),
+ "i" (SPRN_MMCR0),
+ "i" (SPRN_PMC5), "i" (SPRN_PMC6));
+
+ if (mmcr0 & MMCR0_FC)
+ freeze_limited_counters(cpuhw, pmc5, pmc6);
+ else
+ thaw_limited_counters(cpuhw, pmc5, pmc6);
+
+ /*
+ * Write the full MMCR0 including the counter overflow interrupt
+ * enable bits, if necessary.
+ */
+ if (mmcr0 & (MMCR0_PMC1CE | MMCR0_PMCjCE))
+ mtspr(SPRN_MMCR0, mmcr0);
+}
+
+/*
+ * Disable all counters to prevent PMU interrupts and to allow
+ * counters to be added or removed.
+ */
+void hw_perf_disable(void)
+{
+ struct cpu_hw_counters *cpuhw;
+ unsigned long ret;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ cpuhw = &__get_cpu_var(cpu_hw_counters);
+
+ ret = cpuhw->disabled;
+ if (!ret) {
+ cpuhw->disabled = 1;
+ cpuhw->n_added = 0;
+
+ /*
+ * Check if we ever enabled the PMU on this cpu.
+ */
+ if (!cpuhw->pmcs_enabled) {
+ if (ppc_md.enable_pmcs)
+ ppc_md.enable_pmcs();
+ cpuhw->pmcs_enabled = 1;
+ }
+
+ /*
+ * Disable instruction sampling if it was enabled
+ */
+ if (cpuhw->mmcr[2] & MMCRA_SAMPLE_ENABLE) {
+ mtspr(SPRN_MMCRA,
+ cpuhw->mmcr[2] & ~MMCRA_SAMPLE_ENABLE);
+ mb();
+ }
+
+ /*
+ * Set the 'freeze counters' bit.
+ * The barrier is to make sure the mtspr has been
+ * executed and the PMU has frozen the counters
+ * before we return.
+ */
+ write_mmcr0(cpuhw, mfspr(SPRN_MMCR0) | MMCR0_FC);
+ mb();
+ }
+ local_irq_restore(flags);
+}
+
+/*
+ * Re-enable all counters if disable == 0.
+ * If we were previously disabled and counters were added, then
+ * put the new config on the PMU.
+ */
+void hw_perf_enable(void)
+{
+ struct perf_counter *counter;
+ struct cpu_hw_counters *cpuhw;
+ unsigned long flags;
+ long i;
+ unsigned long val;
+ s64 left;
+ unsigned int hwc_index[MAX_HWCOUNTERS];
+ int n_lim;
+ int idx;
+
+ local_irq_save(flags);
+ cpuhw = &__get_cpu_var(cpu_hw_counters);
+ if (!cpuhw->disabled) {
+ local_irq_restore(flags);
+ return;
+ }
+ cpuhw->disabled = 0;
+
+ /*
+ * If we didn't change anything, or only removed counters,
+ * no need to recalculate MMCR* settings and reset the PMCs.
+ * Just reenable the PMU with the current MMCR* settings
+ * (possibly updated for removal of counters).
+ */
+ if (!cpuhw->n_added) {
+ mtspr(SPRN_MMCRA, cpuhw->mmcr[2] & ~MMCRA_SAMPLE_ENABLE);
+ mtspr(SPRN_MMCR1, cpuhw->mmcr[1]);
+ if (cpuhw->n_counters == 0)
+ get_lppaca()->pmcregs_in_use = 0;
+ goto out_enable;
+ }
+
+ /*
+ * Compute MMCR* values for the new set of counters
+ */
+ if (ppmu->compute_mmcr(cpuhw->events, cpuhw->n_counters, hwc_index,
+ cpuhw->mmcr)) {
+ /* shouldn't ever get here */
+ printk(KERN_ERR "oops compute_mmcr failed\n");
+ goto out;
+ }
+
+ /*
+ * Add in MMCR0 freeze bits corresponding to the
+ * attr.exclude_* bits for the first counter.
+ * We have already checked that all counters have the
+ * same values for these bits as the first counter.
+ */
+ counter = cpuhw->counter[0];
+ if (counter->attr.exclude_user)
+ cpuhw->mmcr[0] |= MMCR0_FCP;
+ if (counter->attr.exclude_kernel)
+ cpuhw->mmcr[0] |= freeze_counters_kernel;
+ if (counter->attr.exclude_hv)
+ cpuhw->mmcr[0] |= MMCR0_FCHV;
+
+ /*
+ * Write the new configuration to MMCR* with the freeze
+ * bit set and set the hardware counters to their initial values.
+ * Then unfreeze the counters.
+ */
+ get_lppaca()->pmcregs_in_use = 1;
+ mtspr(SPRN_MMCRA, cpuhw->mmcr[2] & ~MMCRA_SAMPLE_ENABLE);
+ mtspr(SPRN_MMCR1, cpuhw->mmcr[1]);
+ mtspr(SPRN_MMCR0, (cpuhw->mmcr[0] & ~(MMCR0_PMC1CE | MMCR0_PMCjCE))
+ | MMCR0_FC);
+
+ /*
+ * Read off any pre-existing counters that need to move
+ * to another PMC.
+ */
+ for (i = 0; i < cpuhw->n_counters; ++i) {
+ counter = cpuhw->counter[i];
+ if (counter->hw.idx && counter->hw.idx != hwc_index[i] + 1) {
+ power_pmu_read(counter);
+ write_pmc(counter->hw.idx, 0);
+ counter->hw.idx = 0;
+ }
+ }
+
+ /*
+ * Initialize the PMCs for all the new and moved counters.
+ */
+ cpuhw->n_limited = n_lim = 0;
+ for (i = 0; i < cpuhw->n_counters; ++i) {
+ counter = cpuhw->counter[i];
+ if (counter->hw.idx)
+ continue;
+ idx = hwc_index[i] + 1;
+ if (is_limited_pmc(idx)) {
+ cpuhw->limited_counter[n_lim] = counter;
+ cpuhw->limited_hwidx[n_lim] = idx;
+ ++n_lim;
+ continue;
+ }
+ val = 0;
+ if (counter->hw.sample_period) {
+ left = atomic64_read(&counter->hw.period_left);
+ if (left < 0x80000000L)
+ val = 0x80000000L - left;
+ }
+ atomic64_set(&counter->hw.prev_count, val);
+ counter->hw.idx = idx;
+ write_pmc(idx, val);
+ perf_counter_update_userpage(counter);
+ }
+ cpuhw->n_limited = n_lim;
+ cpuhw->mmcr[0] |= MMCR0_PMXE | MMCR0_FCECE;
+
+ out_enable:
+ mb();
+ write_mmcr0(cpuhw, cpuhw->mmcr[0]);
+
+ /*
+ * Enable instruction sampling if necessary
+ */
+ if (cpuhw->mmcr[2] & MMCRA_SAMPLE_ENABLE) {
+ mb();
+ mtspr(SPRN_MMCRA, cpuhw->mmcr[2]);
+ }
+
+ out:
+ local_irq_restore(flags);
+}
+
+static int collect_events(struct perf_counter *group, int max_count,
+ struct perf_counter *ctrs[], u64 *events,
+ unsigned int *flags)
+{
+ int n = 0;
+ struct perf_counter *counter;
+
+ if (!is_software_counter(group)) {
+ if (n >= max_count)
+ return -1;
+ ctrs[n] = group;
+ flags[n] = group->hw.counter_base;
+ events[n++] = group->hw.config;
+ }
+ list_for_each_entry(counter, &group->sibling_list, list_entry) {
+ if (!is_software_counter(counter) &&
+ counter->state != PERF_COUNTER_STATE_OFF) {
+ if (n >= max_count)
+ return -1;
+ ctrs[n] = counter;
+ flags[n] = counter->hw.counter_base;
+ events[n++] = counter->hw.config;
+ }
+ }
+ return n;
+}
+
+static void counter_sched_in(struct perf_counter *counter, int cpu)
+{
+ counter->state = PERF_COUNTER_STATE_ACTIVE;
+ counter->oncpu = cpu;
+ counter->tstamp_running += counter->ctx->time - counter->tstamp_stopped;
+ if (is_software_counter(counter))
+ counter->pmu->enable(counter);
+}
+
+/*
+ * Called to enable a whole group of counters.
+ * Returns 1 if the group was enabled, or -EAGAIN if it could not be.
+ * Assumes the caller has disabled interrupts and has
+ * frozen the PMU with hw_perf_save_disable.
+ */
+int hw_perf_group_sched_in(struct perf_counter *group_leader,
+ struct perf_cpu_context *cpuctx,
+ struct perf_counter_context *ctx, int cpu)
+{
+ struct cpu_hw_counters *cpuhw;
+ long i, n, n0;
+ struct perf_counter *sub;
+
+ cpuhw = &__get_cpu_var(cpu_hw_counters);
+ n0 = cpuhw->n_counters;
+ n = collect_events(group_leader, ppmu->n_counter - n0,
+ &cpuhw->counter[n0], &cpuhw->events[n0],
+ &cpuhw->flags[n0]);
+ if (n < 0)
+ return -EAGAIN;
+ if (check_excludes(cpuhw->counter, cpuhw->flags, n0, n))
+ return -EAGAIN;
+ i = power_check_constraints(cpuhw->events, cpuhw->flags, n + n0);
+ if (i < 0)
+ return -EAGAIN;
+ cpuhw->n_counters = n0 + n;
+ cpuhw->n_added += n;
+
+ /*
+ * OK, this group can go on; update counter states etc.,
+ * and enable any software counters
+ */
+ for (i = n0; i < n0 + n; ++i)
+ cpuhw->counter[i]->hw.config = cpuhw->events[i];
+ cpuctx->active_oncpu += n;
+ n = 1;
+ counter_sched_in(group_leader, cpu);
+ list_for_each_entry(sub, &group_leader->sibling_list, list_entry) {
+ if (sub->state != PERF_COUNTER_STATE_OFF) {
+ counter_sched_in(sub, cpu);
+ ++n;
+ }
+ }
+ ctx->nr_active += n;
+
+ return 1;
+}
+
+/*
+ * Add a counter to the PMU.
+ * If all counters are not already frozen, then we disable and
+ * re-enable the PMU in order to get hw_perf_enable to do the
+ * actual work of reconfiguring the PMU.
+ */
+static int power_pmu_enable(struct perf_counter *counter)
+{
+ struct cpu_hw_counters *cpuhw;
+ unsigned long flags;
+ int n0;
+ int ret = -EAGAIN;
+
+ local_irq_save(flags);
+ perf_disable();
+
+ /*
+ * Add the counter to the list (if there is room)
+ * and check whether the total set is still feasible.
+ */
+ cpuhw = &__get_cpu_var(cpu_hw_counters);
+ n0 = cpuhw->n_counters;
+ if (n0 >= ppmu->n_counter)
+ goto out;
+ cpuhw->counter[n0] = counter;
+ cpuhw->events[n0] = counter->hw.config;
+ cpuhw->flags[n0] = counter->hw.counter_base;
+ if (check_excludes(cpuhw->counter, cpuhw->flags, n0, 1))
+ goto out;
+ if (power_check_constraints(cpuhw->events, cpuhw->flags, n0 + 1))
+ goto out;
+
+ counter->hw.config = cpuhw->events[n0];
+ ++cpuhw->n_counters;
+ ++cpuhw->n_added;
+
+ ret = 0;
+ out:
+ perf_enable();
+ local_irq_restore(flags);
+ return ret;
+}
+
+/*
+ * Remove a counter from the PMU.
+ */
+static void power_pmu_disable(struct perf_counter *counter)
+{
+ struct cpu_hw_counters *cpuhw;
+ long i;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ perf_disable();
+
+ power_pmu_read(counter);
+
+ cpuhw = &__get_cpu_var(cpu_hw_counters);
+ for (i = 0; i < cpuhw->n_counters; ++i) {
+ if (counter == cpuhw->counter[i]) {
+ while (++i < cpuhw->n_counters)
+ cpuhw->counter[i-1] = cpuhw->counter[i];
+ --cpuhw->n_counters;
+ ppmu->disable_pmc(counter->hw.idx - 1, cpuhw->mmcr);
+ if (counter->hw.idx) {
+ write_pmc(counter->hw.idx, 0);
+ counter->hw.idx = 0;
+ }
+ perf_counter_update_userpage(counter);
+ break;
+ }
+ }
+ for (i = 0; i < cpuhw->n_limited; ++i)
+ if (counter == cpuhw->limited_counter[i])
+ break;
+ if (i < cpuhw->n_limited) {
+ while (++i < cpuhw->n_limited) {
+ cpuhw->limited_counter[i-1] = cpuhw->limited_counter[i];
+ cpuhw->limited_hwidx[i-1] = cpuhw->limited_hwidx[i];
+ }
+ --cpuhw->n_limited;
+ }
+ if (cpuhw->n_counters == 0) {
+ /* disable exceptions if no counters are running */
+ cpuhw->mmcr[0] &= ~(MMCR0_PMXE | MMCR0_FCECE);
+ }
+
+ perf_enable();
+ local_irq_restore(flags);
+}
+
+/*
+ * Re-enable interrupts on a counter after they were throttled
+ * because they were coming too fast.
+ */
+static void power_pmu_unthrottle(struct perf_counter *counter)
+{
+ s64 val, left;
+ unsigned long flags;
+
+ if (!counter->hw.idx || !counter->hw.sample_period)
+ return;
+ local_irq_save(flags);
+ perf_disable();
+ power_pmu_read(counter);
+ left = counter->hw.sample_period;
+ counter->hw.last_period = left;
+ val = 0;
+ if (left < 0x80000000L)
+ val = 0x80000000L - left;
+ write_pmc(counter->hw.idx, val);
+ atomic64_set(&counter->hw.prev_count, val);
+ atomic64_set(&counter->hw.period_left, left);
+ perf_counter_update_userpage(counter);
+ perf_enable();
+ local_irq_restore(flags);
+}
+
+struct pmu power_pmu = {
+ .enable = power_pmu_enable,
+ .disable = power_pmu_disable,
+ .read = power_pmu_read,
+ .unthrottle = power_pmu_unthrottle,
+};
+
+/*
+ * Return 1 if we might be able to put counter on a limited PMC,
+ * or 0 if not.
+ * A counter can only go on a limited PMC if it counts something
+ * that a limited PMC can count, doesn't require interrupts, and
+ * doesn't exclude any processor mode.
+ */
+static int can_go_on_limited_pmc(struct perf_counter *counter, u64 ev,
+ unsigned int flags)
+{
+ int n;
+ u64 alt[MAX_EVENT_ALTERNATIVES];
+
+ if (counter->attr.exclude_user
+ || counter->attr.exclude_kernel
+ || counter->attr.exclude_hv
+ || counter->attr.sample_period)
+ return 0;
+
+ if (ppmu->limited_pmc_event(ev))
+ return 1;
+
+ /*
+ * The requested event isn't on a limited PMC already;
+ * see if any alternative code goes on a limited PMC.
+ */
+ if (!ppmu->get_alternatives)
+ return 0;
+
+ flags |= PPMU_LIMITED_PMC_OK | PPMU_LIMITED_PMC_REQD;
+ n = ppmu->get_alternatives(ev, flags, alt);
+
+ return n > 0;
+}
+
+/*
+ * Find an alternative event that goes on a normal PMC, if possible,
+ * and return the event code, or 0 if there is no such alternative.
+ * (Note: event code 0 is "don't count" on all machines.)
+ */
+static u64 normal_pmc_alternative(u64 ev, unsigned long flags)
+{
+ u64 alt[MAX_EVENT_ALTERNATIVES];
+ int n;
+
+ flags &= ~(PPMU_LIMITED_PMC_OK | PPMU_LIMITED_PMC_REQD);
+ n = ppmu->get_alternatives(ev, flags, alt);
+ if (!n)
+ return 0;
+ return alt[0];
+}
+
+/* Number of perf_counters counting hardware events */
+static atomic_t num_counters;
+/* Used to avoid races in calling reserve/release_pmc_hardware */
+static DEFINE_MUTEX(pmc_reserve_mutex);
+
+/*
+ * Release the PMU if this is the last perf_counter.
+ */
+static void hw_perf_counter_destroy(struct perf_counter *counter)
+{
+ if (!atomic_add_unless(&num_counters, -1, 1)) {
+ mutex_lock(&pmc_reserve_mutex);
+ if (atomic_dec_return(&num_counters) == 0)
+ release_pmc_hardware();
+ mutex_unlock(&pmc_reserve_mutex);
+ }
+}
+
+/*
+ * Translate a generic cache event config to a raw event code.
+ */
+static int hw_perf_cache_event(u64 config, u64 *eventp)
+{
+ unsigned long type, op, result;
+ int ev;
+
+ if (!ppmu->cache_events)
+ return -EINVAL;
+
+ /* unpack config */
+ type = config & 0xff;
+ op = (config >> 8) & 0xff;
+ result = (config >> 16) & 0xff;
+
+ if (type >= PERF_COUNT_HW_CACHE_MAX ||
+ op >= PERF_COUNT_HW_CACHE_OP_MAX ||
+ result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
+ return -EINVAL;
+
+ ev = (*ppmu->cache_events)[type][op][result];
+ if (ev == 0)
+ return -EOPNOTSUPP;
+ if (ev == -1)
+ return -EINVAL;
+ *eventp = ev;
+ return 0;
+}
+
+const struct pmu *hw_perf_counter_init(struct perf_counter *counter)
+{
+ u64 ev;
+ unsigned long flags;
+ struct perf_counter *ctrs[MAX_HWCOUNTERS];
+ u64 events[MAX_HWCOUNTERS];
+ unsigned int cflags[MAX_HWCOUNTERS];
+ int n;
+ int err;
+
+ if (!ppmu)
+ return ERR_PTR(-ENXIO);
+ switch (counter->attr.type) {
+ case PERF_TYPE_HARDWARE:
+ ev = counter->attr.config;
+ if (ev >= ppmu->n_generic || ppmu->generic_events[ev] == 0)
+ return ERR_PTR(-EOPNOTSUPP);
+ ev = ppmu->generic_events[ev];
+ break;
+ case PERF_TYPE_HW_CACHE:
+ err = hw_perf_cache_event(counter->attr.config, &ev);
+ if (err)
+ return ERR_PTR(err);
+ break;
+ case PERF_TYPE_RAW:
+ ev = counter->attr.config;
+ break;
+ }
+ counter->hw.config_base = ev;
+ counter->hw.idx = 0;
+
+ /*
+ * If we are not running on a hypervisor, force the
+ * exclude_hv bit to 0 so that we don't care what
+ * the user set it to.
+ */
+ if (!firmware_has_feature(FW_FEATURE_LPAR))
+ counter->attr.exclude_hv = 0;
+
+ /*
+ * If this is a per-task counter, then we can use
+ * PM_RUN_* events interchangeably with their non RUN_*
+ * equivalents, e.g. PM_RUN_CYC instead of PM_CYC.
+ * XXX we should check if the task is an idle task.
+ */
+ flags = 0;
+ if (counter->ctx->task)
+ flags |= PPMU_ONLY_COUNT_RUN;
+
+ /*
+ * If this machine has limited counters, check whether this
+ * event could go on a limited counter.
+ */
+ if (ppmu->flags & PPMU_LIMITED_PMC5_6) {
+ if (can_go_on_limited_pmc(counter, ev, flags)) {
+ flags |= PPMU_LIMITED_PMC_OK;
+ } else if (ppmu->limited_pmc_event(ev)) {
+ /*
+ * The requested event is on a limited PMC,
+ * but we can't use a limited PMC; see if any
+ * alternative goes on a normal PMC.
+ */
+ ev = normal_pmc_alternative(ev, flags);
+ if (!ev)
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ /*
+ * If this is in a group, check if it can go on with all the
+ * other hardware counters in the group. We assume the counter
+ * hasn't been linked into its leader's sibling list at this point.
+ */
+ n = 0;
+ if (counter->group_leader != counter) {
+ n = collect_events(counter->group_leader, ppmu->n_counter - 1,
+ ctrs, events, cflags);
+ if (n < 0)
+ return ERR_PTR(-EINVAL);
+ }
+ events[n] = ev;
+ ctrs[n] = counter;
+ cflags[n] = flags;
+ if (check_excludes(ctrs, cflags, n, 1))
+ return ERR_PTR(-EINVAL);
+ if (power_check_constraints(events, cflags, n + 1))
+ return ERR_PTR(-EINVAL);
+
+ counter->hw.config = events[n];
+ counter->hw.counter_base = cflags[n];
+ counter->hw.last_period = counter->hw.sample_period;
+ atomic64_set(&counter->hw.period_left, counter->hw.last_period);
+
+ /*
+ * See if we need to reserve the PMU.
+ * If no counters are currently in use, then we have to take a
+ * mutex to ensure that we don't race with another task doing
+ * reserve_pmc_hardware or release_pmc_hardware.
+ */
+ err = 0;
+ if (!atomic_inc_not_zero(&num_counters)) {
+ mutex_lock(&pmc_reserve_mutex);
+ if (atomic_read(&num_counters) == 0 &&
+ reserve_pmc_hardware(perf_counter_interrupt))
+ err = -EBUSY;
+ else
+ atomic_inc(&num_counters);
+ mutex_unlock(&pmc_reserve_mutex);
+ }
+ counter->destroy = hw_perf_counter_destroy;
+
+ if (err)
+ return ERR_PTR(err);
+ return &power_pmu;
+}
+
+/*
+ * A counter has overflowed; update its count and record
+ * things if requested. Note that interrupts are hard-disabled
+ * here so there is no possibility of being interrupted.
+ */
+static void record_and_restart(struct perf_counter *counter, long val,
+ struct pt_regs *regs, int nmi)
+{
+ u64 period = counter->hw.sample_period;
+ s64 prev, delta, left;
+ int record = 0;
+ u64 addr, mmcra, sdsync;
+
+ /* we don't have to worry about interrupts here */
+ prev = atomic64_read(&counter->hw.prev_count);
+ delta = (val - prev) & 0xfffffffful;
+ atomic64_add(delta, &counter->count);
+
+ /*
+ * See if the total period for this counter has expired,
+ * and update for the next period.
+ */
+ val = 0;
+ left = atomic64_read(&counter->hw.period_left) - delta;
+ if (period) {
+ if (left <= 0) {
+ left += period;
+ if (left <= 0)
+ left = period;
+ record = 1;
+ }
+ if (left < 0x80000000L)
+ val = 0x80000000L - left;
+ }
+
+ /*
+ * Finally record data if requested.
+ */
+ if (record) {
+ struct perf_sample_data data = {
+ .regs = regs,
+ .addr = 0,
+ .period = counter->hw.last_period,
+ };
+
+ if (counter->attr.sample_type & PERF_SAMPLE_ADDR) {
+ /*
+ * The user wants a data address recorded.
+ * If we're not doing instruction sampling,
+ * give them the SDAR (sampled data address).
+ * If we are doing instruction sampling, then only
+ * give them the SDAR if it corresponds to the
+ * instruction pointed to by SIAR; this is indicated
+ * by the [POWER6_]MMCRA_SDSYNC bit in MMCRA.
+ */
+ mmcra = regs->dsisr;
+ sdsync = (ppmu->flags & PPMU_ALT_SIPR) ?
+ POWER6_MMCRA_SDSYNC : MMCRA_SDSYNC;
+ if (!(mmcra & MMCRA_SAMPLE_ENABLE) || (mmcra & sdsync))
+ data.addr = mfspr(SPRN_SDAR);
+ }
+ if (perf_counter_overflow(counter, nmi, &data)) {
+ /*
+ * Interrupts are coming too fast - throttle them
+ * by setting the counter to 0, so it will be
+ * at least 2^30 cycles until the next interrupt
+ * (assuming each counter counts at most 2 counts
+ * per cycle).
+ */
+ val = 0;
+ left = ~0ULL >> 1;
+ }
+ }
+
+ write_pmc(counter->hw.idx, val);
+ atomic64_set(&counter->hw.prev_count, val);
+ atomic64_set(&counter->hw.period_left, left);
+ perf_counter_update_userpage(counter);
+}
+
+/*
+ * Called from generic code to get the misc flags (i.e. processor mode)
+ * for an event.
+ */
+unsigned long perf_misc_flags(struct pt_regs *regs)
+{
+ unsigned long mmcra;
+
+ if (TRAP(regs) != 0xf00) {
+ /* not a PMU interrupt */
+ return user_mode(regs) ? PERF_EVENT_MISC_USER :
+ PERF_EVENT_MISC_KERNEL;
+ }
+
+ mmcra = regs->dsisr;
+ if (ppmu->flags & PPMU_ALT_SIPR) {
+ if (mmcra & POWER6_MMCRA_SIHV)
+ return PERF_EVENT_MISC_HYPERVISOR;
+ return (mmcra & POWER6_MMCRA_SIPR) ? PERF_EVENT_MISC_USER :
+ PERF_EVENT_MISC_KERNEL;
+ }
+ if (mmcra & MMCRA_SIHV)
+ return PERF_EVENT_MISC_HYPERVISOR;
+ return (mmcra & MMCRA_SIPR) ? PERF_EVENT_MISC_USER :
+ PERF_EVENT_MISC_KERNEL;
+}
+
+/*
+ * Called from generic code to get the instruction pointer
+ * for an event.
+ */
+unsigned long perf_instruction_pointer(struct pt_regs *regs)
+{
+ unsigned long mmcra;
+ unsigned long ip;
+ unsigned long slot;
+
+ if (TRAP(regs) != 0xf00)
+ return regs->nip; /* not a PMU interrupt */
+
+ ip = mfspr(SPRN_SIAR);
+ mmcra = regs->dsisr;
+ if ((mmcra & MMCRA_SAMPLE_ENABLE) && !(ppmu->flags & PPMU_ALT_SIPR)) {
+ slot = (mmcra & MMCRA_SLOT) >> MMCRA_SLOT_SHIFT;
+ if (slot > 1)
+ ip += 4 * (slot - 1);
+ }
+ return ip;
+}
+
+/*
+ * Performance monitor interrupt stuff
+ */
+static void perf_counter_interrupt(struct pt_regs *regs)
+{
+ int i;
+ struct cpu_hw_counters *cpuhw = &__get_cpu_var(cpu_hw_counters);
+ struct perf_counter *counter;
+ long val;
+ int found = 0;
+ int nmi;
+
+ if (cpuhw->n_limited)
+ freeze_limited_counters(cpuhw, mfspr(SPRN_PMC5),
+ mfspr(SPRN_PMC6));
+
+ /*
+ * Overload regs->dsisr to store MMCRA so we only need to read it once.
+ */
+ regs->dsisr = mfspr(SPRN_MMCRA);
+
+ /*
+ * If interrupts were soft-disabled when this PMU interrupt
+ * occurred, treat it as an NMI.
+ */
+ nmi = !regs->softe;
+ if (nmi)
+ nmi_enter();
+ else
+ irq_enter();
+
+ for (i = 0; i < cpuhw->n_counters; ++i) {
+ counter = cpuhw->counter[i];
+ if (!counter->hw.idx || is_limited_pmc(counter->hw.idx))
+ continue;
+ val = read_pmc(counter->hw.idx);
+ if ((int)val < 0) {
+ /* counter has overflowed */
+ found = 1;
+ record_and_restart(counter, val, regs, nmi);
+ }
+ }
+
+ /*
+ * In case we didn't find and reset the counter that caused
+ * the interrupt, scan all counters and reset any that are
+ * negative, to avoid getting continual interrupts.
+ * Any that we processed in the previous loop will not be negative.
+ */
+ if (!found) {
+ for (i = 0; i < ppmu->n_counter; ++i) {
+ if (is_limited_pmc(i + 1))
+ continue;
+ val = read_pmc(i + 1);
+ if ((int)val < 0)
+ write_pmc(i + 1, 0);
+ }
+ }
+
+ /*
+ * Reset MMCR0 to its normal value. This will set PMXE and
+ * clear FC (freeze counters) and PMAO (perf mon alert occurred)
+ * and thus allow interrupts to occur again.
+ * XXX might want to use MSR.PM to keep the counters frozen until
+ * we get back out of this interrupt.
+ */
+ write_mmcr0(cpuhw, cpuhw->mmcr[0]);
+
+ if (nmi)
+ nmi_exit();
+ else
+ irq_exit();
+}
+
+void hw_perf_counter_setup(int cpu)
+{
+ struct cpu_hw_counters *cpuhw = &per_cpu(cpu_hw_counters, cpu);
+
+ memset(cpuhw, 0, sizeof(*cpuhw));
+ cpuhw->mmcr[0] = MMCR0_FC;
+}
+
+extern struct power_pmu power4_pmu;
+extern struct power_pmu ppc970_pmu;
+extern struct power_pmu power5_pmu;
+extern struct power_pmu power5p_pmu;
+extern struct power_pmu power6_pmu;
+extern struct power_pmu power7_pmu;
+
+static int init_perf_counters(void)
+{
+ unsigned long pvr;
+
+ /* XXX should get this from cputable */
+ pvr = mfspr(SPRN_PVR);
+ switch (PVR_VER(pvr)) {
+ case PV_POWER4:
+ case PV_POWER4p:
+ ppmu = &power4_pmu;
+ break;
+ case PV_970:
+ case PV_970FX:
+ case PV_970MP:
+ ppmu = &ppc970_pmu;
+ break;
+ case PV_POWER5:
+ ppmu = &power5_pmu;
+ break;
+ case PV_POWER5p:
+ ppmu = &power5p_pmu;
+ break;
+ case 0x3e:
+ ppmu = &power6_pmu;
+ break;
+ case 0x3f:
+ ppmu = &power7_pmu;
+ break;
+ }
+
+ /*
+ * Use FCHV to ignore kernel events if MSR.HV is set.
+ */
+ if (mfmsr() & MSR_HV)
+ freeze_counters_kernel = MMCR0_FCHV;
+
+ return 0;
+}
+
+arch_initcall(init_perf_counters);
--- /dev/null
+/*
+ * Performance counter support for POWER4 (GP) and POWER4+ (GQ) processors.
+ *
+ * Copyright 2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/perf_counter.h>
+#include <asm/reg.h>
+
+/*
+ * Bits in event code for POWER4
+ */
+#define PM_PMC_SH 12 /* PMC number (1-based) for direct events */
+#define PM_PMC_MSK 0xf
+#define PM_UNIT_SH 8 /* TTMMUX number and setting - unit select */
+#define PM_UNIT_MSK 0xf
+#define PM_LOWER_SH 6
+#define PM_LOWER_MSK 1
+#define PM_LOWER_MSKS 0x40
+#define PM_BYTE_SH 4 /* Byte number of event bus to use */
+#define PM_BYTE_MSK 3
+#define PM_PMCSEL_MSK 7
+
+/*
+ * Unit code values
+ */
+#define PM_FPU 1
+#define PM_ISU1 2
+#define PM_IFU 3
+#define PM_IDU0 4
+#define PM_ISU1_ALT 6
+#define PM_ISU2 7
+#define PM_IFU_ALT 8
+#define PM_LSU0 9
+#define PM_LSU1 0xc
+#define PM_GPS 0xf
+
+/*
+ * Bits in MMCR0 for POWER4
+ */
+#define MMCR0_PMC1SEL_SH 8
+#define MMCR0_PMC2SEL_SH 1
+#define MMCR_PMCSEL_MSK 0x1f
+
+/*
+ * Bits in MMCR1 for POWER4
+ */
+#define MMCR1_TTM0SEL_SH 62
+#define MMCR1_TTC0SEL_SH 61
+#define MMCR1_TTM1SEL_SH 59
+#define MMCR1_TTC1SEL_SH 58
+#define MMCR1_TTM2SEL_SH 56
+#define MMCR1_TTC2SEL_SH 55
+#define MMCR1_TTM3SEL_SH 53
+#define MMCR1_TTC3SEL_SH 52
+#define MMCR1_TTMSEL_MSK 3
+#define MMCR1_TD_CP_DBG0SEL_SH 50
+#define MMCR1_TD_CP_DBG1SEL_SH 48
+#define MMCR1_TD_CP_DBG2SEL_SH 46
+#define MMCR1_TD_CP_DBG3SEL_SH 44
+#define MMCR1_DEBUG0SEL_SH 43
+#define MMCR1_DEBUG1SEL_SH 42
+#define MMCR1_DEBUG2SEL_SH 41
+#define MMCR1_DEBUG3SEL_SH 40
+#define MMCR1_PMC1_ADDER_SEL_SH 39
+#define MMCR1_PMC2_ADDER_SEL_SH 38
+#define MMCR1_PMC6_ADDER_SEL_SH 37
+#define MMCR1_PMC5_ADDER_SEL_SH 36
+#define MMCR1_PMC8_ADDER_SEL_SH 35
+#define MMCR1_PMC7_ADDER_SEL_SH 34
+#define MMCR1_PMC3_ADDER_SEL_SH 33
+#define MMCR1_PMC4_ADDER_SEL_SH 32
+#define MMCR1_PMC3SEL_SH 27
+#define MMCR1_PMC4SEL_SH 22
+#define MMCR1_PMC5SEL_SH 17
+#define MMCR1_PMC6SEL_SH 12
+#define MMCR1_PMC7SEL_SH 7
+#define MMCR1_PMC8SEL_SH 2 /* note bit 0 is in MMCRA for GP */
+
+static short mmcr1_adder_bits[8] = {
+ MMCR1_PMC1_ADDER_SEL_SH,
+ MMCR1_PMC2_ADDER_SEL_SH,
+ MMCR1_PMC3_ADDER_SEL_SH,
+ MMCR1_PMC4_ADDER_SEL_SH,
+ MMCR1_PMC5_ADDER_SEL_SH,
+ MMCR1_PMC6_ADDER_SEL_SH,
+ MMCR1_PMC7_ADDER_SEL_SH,
+ MMCR1_PMC8_ADDER_SEL_SH
+};
+
+/*
+ * Bits in MMCRA
+ */
+#define MMCRA_PMC8SEL0_SH 17 /* PMC8SEL bit 0 for GP */
+
+/*
+ * Layout of constraint bits:
+ * 6666555555555544444444443333333333222222222211111111110000000000
+ * 3210987654321098765432109876543210987654321098765432109876543210
+ * |[ >[ >[ >|||[ >[ >< >< >< >< ><><><><><><><><>
+ * | UC1 UC2 UC3 ||| PS1 PS2 B0 B1 B2 B3 P1P2P3P4P5P6P7P8
+ * \SMPL ||\TTC3SEL
+ * |\TTC_IFU_SEL
+ * \TTM2SEL0
+ *
+ * SMPL - SAMPLE_ENABLE constraint
+ * 56: SAMPLE_ENABLE value 0x0100_0000_0000_0000
+ *
+ * UC1 - unit constraint 1: can't have all three of FPU/ISU1/IDU0|ISU2
+ * 55: UC1 error 0x0080_0000_0000_0000
+ * 54: FPU events needed 0x0040_0000_0000_0000
+ * 53: ISU1 events needed 0x0020_0000_0000_0000
+ * 52: IDU0|ISU2 events needed 0x0010_0000_0000_0000
+ *
+ * UC2 - unit constraint 2: can't have all three of FPU/IFU/LSU0
+ * 51: UC2 error 0x0008_0000_0000_0000
+ * 50: FPU events needed 0x0004_0000_0000_0000
+ * 49: IFU events needed 0x0002_0000_0000_0000
+ * 48: LSU0 events needed 0x0001_0000_0000_0000
+ *
+ * UC3 - unit constraint 3: can't have all four of LSU0/IFU/IDU0|ISU2/ISU1
+ * 47: UC3 error 0x8000_0000_0000
+ * 46: LSU0 events needed 0x4000_0000_0000
+ * 45: IFU events needed 0x2000_0000_0000
+ * 44: IDU0|ISU2 events needed 0x1000_0000_0000
+ * 43: ISU1 events needed 0x0800_0000_0000
+ *
+ * TTM2SEL0
+ * 42: 0 = IDU0 events needed
+ * 1 = ISU2 events needed 0x0400_0000_0000
+ *
+ * TTC_IFU_SEL
+ * 41: 0 = IFU.U events needed
+ * 1 = IFU.L events needed 0x0200_0000_0000
+ *
+ * TTC3SEL
+ * 40: 0 = LSU1.U events needed
+ * 1 = LSU1.L events needed 0x0100_0000_0000
+ *
+ * PS1
+ * 39: PS1 error 0x0080_0000_0000
+ * 36-38: count of events needing PMC1/2/5/6 0x0070_0000_0000
+ *
+ * PS2
+ * 35: PS2 error 0x0008_0000_0000
+ * 32-34: count of events needing PMC3/4/7/8 0x0007_0000_0000
+ *
+ * B0
+ * 28-31: Byte 0 event source 0xf000_0000
+ * 1 = FPU
+ * 2 = ISU1
+ * 3 = IFU
+ * 4 = IDU0
+ * 7 = ISU2
+ * 9 = LSU0
+ * c = LSU1
+ * f = GPS
+ *
+ * B1, B2, B3
+ * 24-27, 20-23, 16-19: Byte 1, 2, 3 event sources
+ *
+ * P8
+ * 15: P8 error 0x8000
+ * 14-15: Count of events needing PMC8
+ *
+ * P1..P7
+ * 0-13: Count of events needing PMC1..PMC7
+ *
+ * Note: this doesn't allow events using IFU.U to be combined with events
+ * using IFU.L, though that is feasible (using TTM0 and TTM2). However
+ * there are no listed events for IFU.L (they are debug events not
+ * verified for performance monitoring) so this shouldn't cause a
+ * problem.
+ */
+
+static struct unitinfo {
+ u64 value, mask;
+ int unit;
+ int lowerbit;
+} p4_unitinfo[16] = {
+ [PM_FPU] = { 0x44000000000000ull, 0x88000000000000ull, PM_FPU, 0 },
+ [PM_ISU1] = { 0x20080000000000ull, 0x88000000000000ull, PM_ISU1, 0 },
+ [PM_ISU1_ALT] =
+ { 0x20080000000000ull, 0x88000000000000ull, PM_ISU1, 0 },
+ [PM_IFU] = { 0x02200000000000ull, 0x08820000000000ull, PM_IFU, 41 },
+ [PM_IFU_ALT] =
+ { 0x02200000000000ull, 0x08820000000000ull, PM_IFU, 41 },
+ [PM_IDU0] = { 0x10100000000000ull, 0x80840000000000ull, PM_IDU0, 1 },
+ [PM_ISU2] = { 0x10140000000000ull, 0x80840000000000ull, PM_ISU2, 0 },
+ [PM_LSU0] = { 0x01400000000000ull, 0x08800000000000ull, PM_LSU0, 0 },
+ [PM_LSU1] = { 0x00000000000000ull, 0x00010000000000ull, PM_LSU1, 40 },
+ [PM_GPS] = { 0x00000000000000ull, 0x00000000000000ull, PM_GPS, 0 }
+};
+
+static unsigned char direct_marked_event[8] = {
+ (1<<2) | (1<<3), /* PMC1: PM_MRK_GRP_DISP, PM_MRK_ST_CMPL */
+ (1<<3) | (1<<5), /* PMC2: PM_THRESH_TIMEO, PM_MRK_BRU_FIN */
+ (1<<3), /* PMC3: PM_MRK_ST_CMPL_INT */
+ (1<<4) | (1<<5), /* PMC4: PM_MRK_GRP_CMPL, PM_MRK_CRU_FIN */
+ (1<<4) | (1<<5), /* PMC5: PM_MRK_GRP_TIMEO */
+ (1<<3) | (1<<4) | (1<<5),
+ /* PMC6: PM_MRK_ST_GPS, PM_MRK_FXU_FIN, PM_MRK_GRP_ISSUED */
+ (1<<4) | (1<<5), /* PMC7: PM_MRK_FPU_FIN, PM_MRK_INST_FIN */
+ (1<<4), /* PMC8: PM_MRK_LSU_FIN */
+};
+
+/*
+ * Returns 1 if event counts things relating to marked instructions
+ * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
+ */
+static int p4_marked_instr_event(u64 event)
+{
+ int pmc, psel, unit, byte, bit;
+ unsigned int mask;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ psel = event & PM_PMCSEL_MSK;
+ if (pmc) {
+ if (direct_marked_event[pmc - 1] & (1 << psel))
+ return 1;
+ if (psel == 0) /* add events */
+ bit = (pmc <= 4)? pmc - 1: 8 - pmc;
+ else if (psel == 6) /* decode events */
+ bit = 4;
+ else
+ return 0;
+ } else
+ bit = psel;
+
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ mask = 0;
+ switch (unit) {
+ case PM_LSU1:
+ if (event & PM_LOWER_MSKS)
+ mask = 1 << 28; /* byte 7 bit 4 */
+ else
+ mask = 6 << 24; /* byte 3 bits 1 and 2 */
+ break;
+ case PM_LSU0:
+ /* byte 3, bit 3; byte 2 bits 0,2,3,4,5; byte 1 */
+ mask = 0x083dff00;
+ }
+ return (mask >> (byte * 8 + bit)) & 1;
+}
+
+static int p4_get_constraint(u64 event, u64 *maskp, u64 *valp)
+{
+ int pmc, byte, unit, lower, sh;
+ u64 mask = 0, value = 0;
+ int grp = -1;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 8)
+ return -1;
+ sh = (pmc - 1) * 2;
+ mask |= 2 << sh;
+ value |= 1 << sh;
+ grp = ((pmc - 1) >> 1) & 1;
+ }
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ if (unit) {
+ lower = (event >> PM_LOWER_SH) & PM_LOWER_MSK;
+
+ /*
+ * Bus events on bytes 0 and 2 can be counted
+ * on PMC1/2/5/6; bytes 1 and 3 on PMC3/4/7/8.
+ */
+ if (!pmc)
+ grp = byte & 1;
+
+ if (!p4_unitinfo[unit].unit)
+ return -1;
+ mask |= p4_unitinfo[unit].mask;
+ value |= p4_unitinfo[unit].value;
+ sh = p4_unitinfo[unit].lowerbit;
+ if (sh > 1)
+ value |= (u64)lower << sh;
+ else if (lower != sh)
+ return -1;
+ unit = p4_unitinfo[unit].unit;
+
+ /* Set byte lane select field */
+ mask |= 0xfULL << (28 - 4 * byte);
+ value |= (u64)unit << (28 - 4 * byte);
+ }
+ if (grp == 0) {
+ /* increment PMC1/2/5/6 field */
+ mask |= 0x8000000000ull;
+ value |= 0x1000000000ull;
+ } else {
+ /* increment PMC3/4/7/8 field */
+ mask |= 0x800000000ull;
+ value |= 0x100000000ull;
+ }
+
+ /* Marked instruction events need sample_enable set */
+ if (p4_marked_instr_event(event)) {
+ mask |= 1ull << 56;
+ value |= 1ull << 56;
+ }
+
+ /* PMCSEL=6 decode events on byte 2 need sample_enable clear */
+ if (pmc && (event & PM_PMCSEL_MSK) == 6 && byte == 2)
+ mask |= 1ull << 56;
+
+ *maskp = mask;
+ *valp = value;
+ return 0;
+}
+
+static unsigned int ppc_inst_cmpl[] = {
+ 0x1001, 0x4001, 0x6001, 0x7001, 0x8001
+};
+
+static int p4_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ int i, j, na;
+
+ alt[0] = event;
+ na = 1;
+
+ /* 2 possibilities for PM_GRP_DISP_REJECT */
+ if (event == 0x8003 || event == 0x0224) {
+ alt[1] = event ^ (0x8003 ^ 0x0224);
+ return 2;
+ }
+
+ /* 2 possibilities for PM_ST_MISS_L1 */
+ if (event == 0x0c13 || event == 0x0c23) {
+ alt[1] = event ^ (0x0c13 ^ 0x0c23);
+ return 2;
+ }
+
+ /* several possibilities for PM_INST_CMPL */
+ for (i = 0; i < ARRAY_SIZE(ppc_inst_cmpl); ++i) {
+ if (event == ppc_inst_cmpl[i]) {
+ for (j = 0; j < ARRAY_SIZE(ppc_inst_cmpl); ++j)
+ if (j != i)
+ alt[na++] = ppc_inst_cmpl[j];
+ break;
+ }
+ }
+
+ return na;
+}
+
+static int p4_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], u64 mmcr[])
+{
+ u64 mmcr0 = 0, mmcr1 = 0, mmcra = 0;
+ unsigned int pmc, unit, byte, psel, lower;
+ unsigned int ttm, grp;
+ unsigned int pmc_inuse = 0;
+ unsigned int pmc_grp_use[2];
+ unsigned char busbyte[4];
+ unsigned char unituse[16];
+ unsigned int unitlower = 0;
+ int i;
+
+ if (n_ev > 8)
+ return -1;
+
+ /* First pass to count resource use */
+ pmc_grp_use[0] = pmc_grp_use[1] = 0;
+ memset(busbyte, 0, sizeof(busbyte));
+ memset(unituse, 0, sizeof(unituse));
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc_inuse & (1 << (pmc - 1)))
+ return -1;
+ pmc_inuse |= 1 << (pmc - 1);
+ /* count 1/2/5/6 vs 3/4/7/8 use */
+ ++pmc_grp_use[((pmc - 1) >> 1) & 1];
+ }
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ lower = (event[i] >> PM_LOWER_SH) & PM_LOWER_MSK;
+ if (unit) {
+ if (!pmc)
+ ++pmc_grp_use[byte & 1];
+ if (unit == 6 || unit == 8)
+ /* map alt ISU1/IFU codes: 6->2, 8->3 */
+ unit = (unit >> 1) - 1;
+ if (busbyte[byte] && busbyte[byte] != unit)
+ return -1;
+ busbyte[byte] = unit;
+ lower <<= unit;
+ if (unituse[unit] && lower != (unitlower & lower))
+ return -1;
+ unituse[unit] = 1;
+ unitlower |= lower;
+ }
+ }
+ if (pmc_grp_use[0] > 4 || pmc_grp_use[1] > 4)
+ return -1;
+
+ /*
+ * Assign resources and set multiplexer selects.
+ *
+ * Units 1,2,3 are on TTM0, 4,6,7 on TTM1, 8,10 on TTM2.
+ * Each TTMx can only select one unit, but since
+ * units 2 and 6 are both ISU1, and 3 and 8 are both IFU,
+ * we have some choices.
+ */
+ if (unituse[2] & (unituse[1] | (unituse[3] & unituse[9]))) {
+ unituse[6] = 1; /* Move 2 to 6 */
+ unituse[2] = 0;
+ }
+ if (unituse[3] & (unituse[1] | unituse[2])) {
+ unituse[8] = 1; /* Move 3 to 8 */
+ unituse[3] = 0;
+ unitlower = (unitlower & ~8) | ((unitlower & 8) << 5);
+ }
+ /* Check only one unit per TTMx */
+ if (unituse[1] + unituse[2] + unituse[3] > 1 ||
+ unituse[4] + unituse[6] + unituse[7] > 1 ||
+ unituse[8] + unituse[9] > 1 ||
+ (unituse[5] | unituse[10] | unituse[11] |
+ unituse[13] | unituse[14]))
+ return -1;
+
+ /* Set TTMxSEL fields. Note, units 1-3 => TTM0SEL codes 0-2 */
+ mmcr1 |= (u64)(unituse[3] * 2 + unituse[2]) << MMCR1_TTM0SEL_SH;
+ mmcr1 |= (u64)(unituse[7] * 3 + unituse[6] * 2) << MMCR1_TTM1SEL_SH;
+ mmcr1 |= (u64)unituse[9] << MMCR1_TTM2SEL_SH;
+
+ /* Set TTCxSEL fields. */
+ if (unitlower & 0xe)
+ mmcr1 |= 1ull << MMCR1_TTC0SEL_SH;
+ if (unitlower & 0xf0)
+ mmcr1 |= 1ull << MMCR1_TTC1SEL_SH;
+ if (unitlower & 0xf00)
+ mmcr1 |= 1ull << MMCR1_TTC2SEL_SH;
+ if (unitlower & 0x7000)
+ mmcr1 |= 1ull << MMCR1_TTC3SEL_SH;
+
+ /* Set byte lane select fields. */
+ for (byte = 0; byte < 4; ++byte) {
+ unit = busbyte[byte];
+ if (!unit)
+ continue;
+ if (unit == 0xf) {
+ /* special case for GPS */
+ mmcr1 |= 1ull << (MMCR1_DEBUG0SEL_SH - byte);
+ } else {
+ if (!unituse[unit])
+ ttm = unit - 1; /* 2->1, 3->2 */
+ else
+ ttm = unit >> 2;
+ mmcr1 |= (u64)ttm << (MMCR1_TD_CP_DBG0SEL_SH - 2*byte);
+ }
+ }
+
+ /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ psel = event[i] & PM_PMCSEL_MSK;
+ if (!pmc) {
+ /* Bus event or 00xxx direct event (off or cycles) */
+ if (unit)
+ psel |= 0x10 | ((byte & 2) << 2);
+ for (pmc = 0; pmc < 8; ++pmc) {
+ if (pmc_inuse & (1 << pmc))
+ continue;
+ grp = (pmc >> 1) & 1;
+ if (unit) {
+ if (grp == (byte & 1))
+ break;
+ } else if (pmc_grp_use[grp] < 4) {
+ ++pmc_grp_use[grp];
+ break;
+ }
+ }
+ pmc_inuse |= 1 << pmc;
+ } else {
+ /* Direct event */
+ --pmc;
+ if (psel == 0 && (byte & 2))
+ /* add events on higher-numbered bus */
+ mmcr1 |= 1ull << mmcr1_adder_bits[pmc];
+ else if (psel == 6 && byte == 3)
+ /* seem to need to set sample_enable here */
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+ psel |= 8;
+ }
+ if (pmc <= 1)
+ mmcr0 |= psel << (MMCR0_PMC1SEL_SH - 7 * pmc);
+ else
+ mmcr1 |= psel << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2));
+ if (pmc == 7) /* PMC8 */
+ mmcra |= (psel & 1) << MMCRA_PMC8SEL0_SH;
+ hwc[i] = pmc;
+ if (p4_marked_instr_event(event[i]))
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+ }
+
+ if (pmc_inuse & 1)
+ mmcr0 |= MMCR0_PMC1CE;
+ if (pmc_inuse & 0xfe)
+ mmcr0 |= MMCR0_PMCjCE;
+
+ mmcra |= 0x2000; /* mark only one IOP per PPC instruction */
+
+ /* Return MMCRx values */
+ mmcr[0] = mmcr0;
+ mmcr[1] = mmcr1;
+ mmcr[2] = mmcra;
+ return 0;
+}
+
+static void p4_disable_pmc(unsigned int pmc, u64 mmcr[])
+{
+ /*
+ * Setting the PMCxSEL field to 0 disables PMC x.
+ * (Note that pmc is 0-based here, not 1-based.)
+ */
+ if (pmc <= 1) {
+ mmcr[0] &= ~(0x1fUL << (MMCR0_PMC1SEL_SH - 7 * pmc));
+ } else {
+ mmcr[1] &= ~(0x1fUL << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2)));
+ if (pmc == 7)
+ mmcr[2] &= ~(1UL << MMCRA_PMC8SEL0_SH);
+ }
+}
+
+static int p4_generic_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = 7,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x1001,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x8c10, /* PM_LD_REF_L1 */
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x3c10, /* PM_LD_MISS_L1 */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x330, /* PM_BR_ISSUED */
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x331, /* PM_BR_MPRED_CR */
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power4_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x8c10, 0x3c10 },
+ [C(OP_WRITE)] = { 0x7c10, 0xc13 },
+ [C(OP_PREFETCH)] = { 0xc35, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0xc34, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x904 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x900 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x330, 0x331 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
+struct power_pmu power4_pmu = {
+ .n_counter = 8,
+ .max_alternatives = 5,
+ .add_fields = 0x0000001100005555ull,
+ .test_adder = 0x0011083300000000ull,
+ .compute_mmcr = p4_compute_mmcr,
+ .get_constraint = p4_get_constraint,
+ .get_alternatives = p4_get_alternatives,
+ .disable_pmc = p4_disable_pmc,
+ .n_generic = ARRAY_SIZE(p4_generic_events),
+ .generic_events = p4_generic_events,
+ .cache_events = &power4_cache_events,
+};
--- /dev/null
+/*
+ * Performance counter support for POWER5+/++ (not POWER5) processors.
+ *
+ * Copyright 2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/perf_counter.h>
+#include <asm/reg.h>
+
+/*
+ * Bits in event code for POWER5+ (POWER5 GS) and POWER5++ (POWER5 GS DD3)
+ */
+#define PM_PMC_SH 20 /* PMC number (1-based) for direct events */
+#define PM_PMC_MSK 0xf
+#define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH)
+#define PM_UNIT_SH 16 /* TTMMUX number and setting - unit select */
+#define PM_UNIT_MSK 0xf
+#define PM_BYTE_SH 12 /* Byte number of event bus to use */
+#define PM_BYTE_MSK 7
+#define PM_GRS_SH 8 /* Storage subsystem mux select */
+#define PM_GRS_MSK 7
+#define PM_BUSEVENT_MSK 0x80 /* Set if event uses event bus */
+#define PM_PMCSEL_MSK 0x7f
+
+/* Values in PM_UNIT field */
+#define PM_FPU 0
+#define PM_ISU0 1
+#define PM_IFU 2
+#define PM_ISU1 3
+#define PM_IDU 4
+#define PM_ISU0_ALT 6
+#define PM_GRS 7
+#define PM_LSU0 8
+#define PM_LSU1 0xc
+#define PM_LASTUNIT 0xc
+
+/*
+ * Bits in MMCR1 for POWER5+
+ */
+#define MMCR1_TTM0SEL_SH 62
+#define MMCR1_TTM1SEL_SH 60
+#define MMCR1_TTM2SEL_SH 58
+#define MMCR1_TTM3SEL_SH 56
+#define MMCR1_TTMSEL_MSK 3
+#define MMCR1_TD_CP_DBG0SEL_SH 54
+#define MMCR1_TD_CP_DBG1SEL_SH 52
+#define MMCR1_TD_CP_DBG2SEL_SH 50
+#define MMCR1_TD_CP_DBG3SEL_SH 48
+#define MMCR1_GRS_L2SEL_SH 46
+#define MMCR1_GRS_L2SEL_MSK 3
+#define MMCR1_GRS_L3SEL_SH 44
+#define MMCR1_GRS_L3SEL_MSK 3
+#define MMCR1_GRS_MCSEL_SH 41
+#define MMCR1_GRS_MCSEL_MSK 7
+#define MMCR1_GRS_FABSEL_SH 39
+#define MMCR1_GRS_FABSEL_MSK 3
+#define MMCR1_PMC1_ADDER_SEL_SH 35
+#define MMCR1_PMC2_ADDER_SEL_SH 34
+#define MMCR1_PMC3_ADDER_SEL_SH 33
+#define MMCR1_PMC4_ADDER_SEL_SH 32
+#define MMCR1_PMC1SEL_SH 25
+#define MMCR1_PMC2SEL_SH 17
+#define MMCR1_PMC3SEL_SH 9
+#define MMCR1_PMC4SEL_SH 1
+#define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8)
+#define MMCR1_PMCSEL_MSK 0x7f
+
+/*
+ * Bits in MMCRA
+ */
+
+/*
+ * Layout of constraint bits:
+ * 6666555555555544444444443333333333222222222211111111110000000000
+ * 3210987654321098765432109876543210987654321098765432109876543210
+ * [ ><><>< ><> <><>[ > < >< >< >< ><><><><><><>
+ * NC G0G1G2 G3 T0T1 UC B0 B1 B2 B3 P6P5P4P3P2P1
+ *
+ * NC - number of counters
+ * 51: NC error 0x0008_0000_0000_0000
+ * 48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
+ *
+ * G0..G3 - GRS mux constraints
+ * 46-47: GRS_L2SEL value
+ * 44-45: GRS_L3SEL value
+ * 41-44: GRS_MCSEL value
+ * 39-40: GRS_FABSEL value
+ * Note that these match up with their bit positions in MMCR1
+ *
+ * T0 - TTM0 constraint
+ * 36-37: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0x30_0000_0000
+ *
+ * T1 - TTM1 constraint
+ * 34-35: TTM1SEL value (0=IDU, 3=GRS) 0x0c_0000_0000
+ *
+ * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
+ * 33: UC3 error 0x02_0000_0000
+ * 32: FPU|IFU|ISU1 events needed 0x01_0000_0000
+ * 31: ISU0 events needed 0x01_8000_0000
+ * 30: IDU|GRS events needed 0x00_4000_0000
+ *
+ * B0
+ * 24-27: Byte 0 event source 0x0f00_0000
+ * Encoding as for the event code
+ *
+ * B1, B2, B3
+ * 20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
+ *
+ * P6
+ * 11: P6 error 0x800
+ * 10-11: Count of events needing PMC6
+ *
+ * P1..P5
+ * 0-9: Count of events needing PMC1..PMC5
+ */
+
+static const int grsel_shift[8] = {
+ MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
+ MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
+ MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
+};
+
+/* Masks and values for using events from the various units */
+static u64 unit_cons[PM_LASTUNIT+1][2] = {
+ [PM_FPU] = { 0x3200000000ull, 0x0100000000ull },
+ [PM_ISU0] = { 0x0200000000ull, 0x0080000000ull },
+ [PM_ISU1] = { 0x3200000000ull, 0x3100000000ull },
+ [PM_IFU] = { 0x3200000000ull, 0x2100000000ull },
+ [PM_IDU] = { 0x0e00000000ull, 0x0040000000ull },
+ [PM_GRS] = { 0x0e00000000ull, 0x0c40000000ull },
+};
+
+static int power5p_get_constraint(u64 event, u64 *maskp, u64 *valp)
+{
+ int pmc, byte, unit, sh;
+ int bit, fmask;
+ u64 mask = 0, value = 0;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 6)
+ return -1;
+ sh = (pmc - 1) * 2;
+ mask |= 2 << sh;
+ value |= 1 << sh;
+ if (pmc >= 5 && !(event == 0x500009 || event == 0x600005))
+ return -1;
+ }
+ if (event & PM_BUSEVENT_MSK) {
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ if (unit > PM_LASTUNIT)
+ return -1;
+ if (unit == PM_ISU0_ALT)
+ unit = PM_ISU0;
+ mask |= unit_cons[unit][0];
+ value |= unit_cons[unit][1];
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ if (byte >= 4) {
+ if (unit != PM_LSU1)
+ return -1;
+ /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
+ ++unit;
+ byte &= 3;
+ }
+ if (unit == PM_GRS) {
+ bit = event & 7;
+ fmask = (bit == 6)? 7: 3;
+ sh = grsel_shift[bit];
+ mask |= (u64)fmask << sh;
+ value |= (u64)((event >> PM_GRS_SH) & fmask) << sh;
+ }
+ /* Set byte lane select field */
+ mask |= 0xfULL << (24 - 4 * byte);
+ value |= (u64)unit << (24 - 4 * byte);
+ }
+ if (pmc < 5) {
+ /* need a counter from PMC1-4 set */
+ mask |= 0x8000000000000ull;
+ value |= 0x1000000000000ull;
+ }
+ *maskp = mask;
+ *valp = value;
+ return 0;
+}
+
+static int power5p_limited_pmc_event(u64 event)
+{
+ int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+
+ return pmc == 5 || pmc == 6;
+}
+
+#define MAX_ALT 3 /* at most 3 alternatives for any event */
+
+static const unsigned int event_alternatives[][MAX_ALT] = {
+ { 0x100c0, 0x40001f }, /* PM_GCT_FULL_CYC */
+ { 0x120e4, 0x400002 }, /* PM_GRP_DISP_REJECT */
+ { 0x230e2, 0x323087 }, /* PM_BR_PRED_CR */
+ { 0x230e3, 0x223087, 0x3230a0 }, /* PM_BR_PRED_TA */
+ { 0x410c7, 0x441084 }, /* PM_THRD_L2MISS_BOTH_CYC */
+ { 0x800c4, 0xc20e0 }, /* PM_DTLB_MISS */
+ { 0xc50c6, 0xc60e0 }, /* PM_MRK_DTLB_MISS */
+ { 0x100005, 0x600005 }, /* PM_RUN_CYC */
+ { 0x100009, 0x200009 }, /* PM_INST_CMPL */
+ { 0x200015, 0x300015 }, /* PM_LSU_LMQ_SRQ_EMPTY_CYC */
+ { 0x300009, 0x400009 }, /* PM_INST_DISP */
+};
+
+/*
+ * Scan the alternatives table for a match and return the
+ * index into the alternatives table if found, else -1.
+ */
+static int find_alternative(unsigned int event)
+{
+ int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
+ if (event < event_alternatives[i][0])
+ break;
+ for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
+ if (event == event_alternatives[i][j])
+ return i;
+ }
+ return -1;
+}
+
+static const unsigned char bytedecode_alternatives[4][4] = {
+ /* PMC 1 */ { 0x21, 0x23, 0x25, 0x27 },
+ /* PMC 2 */ { 0x07, 0x17, 0x0e, 0x1e },
+ /* PMC 3 */ { 0x20, 0x22, 0x24, 0x26 },
+ /* PMC 4 */ { 0x07, 0x17, 0x0e, 0x1e }
+};
+
+/*
+ * Some direct events for decodes of event bus byte 3 have alternative
+ * PMCSEL values on other counters. This returns the alternative
+ * event code for those that do, or -1 otherwise. This also handles
+ * alternative PCMSEL values for add events.
+ */
+static s64 find_alternative_bdecode(u64 event)
+{
+ int pmc, altpmc, pp, j;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc == 0 || pmc > 4)
+ return -1;
+ altpmc = 5 - pmc; /* 1 <-> 4, 2 <-> 3 */
+ pp = event & PM_PMCSEL_MSK;
+ for (j = 0; j < 4; ++j) {
+ if (bytedecode_alternatives[pmc - 1][j] == pp) {
+ return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
+ (altpmc << PM_PMC_SH) |
+ bytedecode_alternatives[altpmc - 1][j];
+ }
+ }
+
+ /* new decode alternatives for power5+ */
+ if (pmc == 1 && (pp == 0x0d || pp == 0x0e))
+ return event + (2 << PM_PMC_SH) + (0x2e - 0x0d);
+ if (pmc == 3 && (pp == 0x2e || pp == 0x2f))
+ return event - (2 << PM_PMC_SH) - (0x2e - 0x0d);
+
+ /* alternative add event encodings */
+ if (pp == 0x10 || pp == 0x28)
+ return ((event ^ (0x10 ^ 0x28)) & ~PM_PMC_MSKS) |
+ (altpmc << PM_PMC_SH);
+
+ return -1;
+}
+
+static int power5p_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ int i, j, nalt = 1;
+ int nlim;
+ s64 ae;
+
+ alt[0] = event;
+ nalt = 1;
+ nlim = power5p_limited_pmc_event(event);
+ i = find_alternative(event);
+ if (i >= 0) {
+ for (j = 0; j < MAX_ALT; ++j) {
+ ae = event_alternatives[i][j];
+ if (ae && ae != event)
+ alt[nalt++] = ae;
+ nlim += power5p_limited_pmc_event(ae);
+ }
+ } else {
+ ae = find_alternative_bdecode(event);
+ if (ae > 0)
+ alt[nalt++] = ae;
+ }
+
+ if (flags & PPMU_ONLY_COUNT_RUN) {
+ /*
+ * We're only counting in RUN state,
+ * so PM_CYC is equivalent to PM_RUN_CYC
+ * and PM_INST_CMPL === PM_RUN_INST_CMPL.
+ * This doesn't include alternatives that don't provide
+ * any extra flexibility in assigning PMCs (e.g.
+ * 0x100005 for PM_RUN_CYC vs. 0xf for PM_CYC).
+ * Note that even with these additional alternatives
+ * we never end up with more than 3 alternatives for any event.
+ */
+ j = nalt;
+ for (i = 0; i < nalt; ++i) {
+ switch (alt[i]) {
+ case 0xf: /* PM_CYC */
+ alt[j++] = 0x600005; /* PM_RUN_CYC */
+ ++nlim;
+ break;
+ case 0x600005: /* PM_RUN_CYC */
+ alt[j++] = 0xf;
+ break;
+ case 0x100009: /* PM_INST_CMPL */
+ alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */
+ ++nlim;
+ break;
+ case 0x500009: /* PM_RUN_INST_CMPL */
+ alt[j++] = 0x100009; /* PM_INST_CMPL */
+ alt[j++] = 0x200009;
+ break;
+ }
+ }
+ nalt = j;
+ }
+
+ if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) {
+ /* remove the limited PMC events */
+ j = 0;
+ for (i = 0; i < nalt; ++i) {
+ if (!power5p_limited_pmc_event(alt[i])) {
+ alt[j] = alt[i];
+ ++j;
+ }
+ }
+ nalt = j;
+ } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) {
+ /* remove all but the limited PMC events */
+ j = 0;
+ for (i = 0; i < nalt; ++i) {
+ if (power5p_limited_pmc_event(alt[i])) {
+ alt[j] = alt[i];
+ ++j;
+ }
+ }
+ nalt = j;
+ }
+
+ return nalt;
+}
+
+/*
+ * Map of which direct events on which PMCs are marked instruction events.
+ * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
+ * Bit 0 is set if it is marked for all PMCs.
+ * The 0x80 bit indicates a byte decode PMCSEL value.
+ */
+static unsigned char direct_event_is_marked[0x28] = {
+ 0, /* 00 */
+ 0x1f, /* 01 PM_IOPS_CMPL */
+ 0x2, /* 02 PM_MRK_GRP_DISP */
+ 0xe, /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
+ 0, /* 04 */
+ 0x1c, /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
+ 0x80, /* 06 */
+ 0x80, /* 07 */
+ 0, 0, 0,/* 08 - 0a */
+ 0x18, /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
+ 0, /* 0c */
+ 0x80, /* 0d */
+ 0x80, /* 0e */
+ 0, /* 0f */
+ 0, /* 10 */
+ 0x14, /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
+ 0, /* 12 */
+ 0x10, /* 13 PM_MRK_GRP_CMPL */
+ 0x1f, /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
+ 0x2, /* 15 PM_MRK_GRP_ISSUED */
+ 0x80, /* 16 */
+ 0x80, /* 17 */
+ 0, 0, 0, 0, 0,
+ 0x80, /* 1d */
+ 0x80, /* 1e */
+ 0, /* 1f */
+ 0x80, /* 20 */
+ 0x80, /* 21 */
+ 0x80, /* 22 */
+ 0x80, /* 23 */
+ 0x80, /* 24 */
+ 0x80, /* 25 */
+ 0x80, /* 26 */
+ 0x80, /* 27 */
+};
+
+/*
+ * Returns 1 if event counts things relating to marked instructions
+ * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
+ */
+static int power5p_marked_instr_event(u64 event)
+{
+ int pmc, psel;
+ int bit, byte, unit;
+ u32 mask;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ psel = event & PM_PMCSEL_MSK;
+ if (pmc >= 5)
+ return 0;
+
+ bit = -1;
+ if (psel < sizeof(direct_event_is_marked)) {
+ if (direct_event_is_marked[psel] & (1 << pmc))
+ return 1;
+ if (direct_event_is_marked[psel] & 0x80)
+ bit = 4;
+ else if (psel == 0x08)
+ bit = pmc - 1;
+ else if (psel == 0x10)
+ bit = 4 - pmc;
+ else if (psel == 0x1b && (pmc == 1 || pmc == 3))
+ bit = 4;
+ } else if ((psel & 0x48) == 0x40) {
+ bit = psel & 7;
+ } else if (psel == 0x28) {
+ bit = pmc - 1;
+ } else if (pmc == 3 && (psel == 0x2e || psel == 0x2f)) {
+ bit = 4;
+ }
+
+ if (!(event & PM_BUSEVENT_MSK) || bit == -1)
+ return 0;
+
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ if (unit == PM_LSU0) {
+ /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
+ mask = 0x5dff00;
+ } else if (unit == PM_LSU1 && byte >= 4) {
+ byte -= 4;
+ /* byte 5 bits 6-7, byte 6 bits 0,4, byte 7 bits 0-4,6 */
+ mask = 0x5f11c000;
+ } else
+ return 0;
+
+ return (mask >> (byte * 8 + bit)) & 1;
+}
+
+static int power5p_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], u64 mmcr[])
+{
+ u64 mmcr1 = 0;
+ u64 mmcra = 0;
+ unsigned int pmc, unit, byte, psel;
+ unsigned int ttm;
+ int i, isbus, bit, grsel;
+ unsigned int pmc_inuse = 0;
+ unsigned char busbyte[4];
+ unsigned char unituse[16];
+ int ttmuse;
+
+ if (n_ev > 6)
+ return -1;
+
+ /* First pass to count resource use */
+ memset(busbyte, 0, sizeof(busbyte));
+ memset(unituse, 0, sizeof(unituse));
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 6)
+ return -1;
+ if (pmc_inuse & (1 << (pmc - 1)))
+ return -1;
+ pmc_inuse |= 1 << (pmc - 1);
+ }
+ if (event[i] & PM_BUSEVENT_MSK) {
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ if (unit > PM_LASTUNIT)
+ return -1;
+ if (unit == PM_ISU0_ALT)
+ unit = PM_ISU0;
+ if (byte >= 4) {
+ if (unit != PM_LSU1)
+ return -1;
+ ++unit;
+ byte &= 3;
+ }
+ if (busbyte[byte] && busbyte[byte] != unit)
+ return -1;
+ busbyte[byte] = unit;
+ unituse[unit] = 1;
+ }
+ }
+
+ /*
+ * Assign resources and set multiplexer selects.
+ *
+ * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
+ * choice we have to deal with.
+ */
+ if (unituse[PM_ISU0] &
+ (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
+ unituse[PM_ISU0_ALT] = 1; /* move ISU to TTM1 */
+ unituse[PM_ISU0] = 0;
+ }
+ /* Set TTM[01]SEL fields. */
+ ttmuse = 0;
+ for (i = PM_FPU; i <= PM_ISU1; ++i) {
+ if (!unituse[i])
+ continue;
+ if (ttmuse++)
+ return -1;
+ mmcr1 |= (u64)i << MMCR1_TTM0SEL_SH;
+ }
+ ttmuse = 0;
+ for (; i <= PM_GRS; ++i) {
+ if (!unituse[i])
+ continue;
+ if (ttmuse++)
+ return -1;
+ mmcr1 |= (u64)(i & 3) << MMCR1_TTM1SEL_SH;
+ }
+ if (ttmuse > 1)
+ return -1;
+
+ /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
+ for (byte = 0; byte < 4; ++byte) {
+ unit = busbyte[byte];
+ if (!unit)
+ continue;
+ if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
+ /* get ISU0 through TTM1 rather than TTM0 */
+ unit = PM_ISU0_ALT;
+ } else if (unit == PM_LSU1 + 1) {
+ /* select lower word of LSU1 for this byte */
+ mmcr1 |= 1ull << (MMCR1_TTM3SEL_SH + 3 - byte);
+ }
+ ttm = unit >> 2;
+ mmcr1 |= (u64)ttm << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
+ }
+
+ /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ psel = event[i] & PM_PMCSEL_MSK;
+ isbus = event[i] & PM_BUSEVENT_MSK;
+ if (!pmc) {
+ /* Bus event or any-PMC direct event */
+ for (pmc = 0; pmc < 4; ++pmc) {
+ if (!(pmc_inuse & (1 << pmc)))
+ break;
+ }
+ if (pmc >= 4)
+ return -1;
+ pmc_inuse |= 1 << pmc;
+ } else if (pmc <= 4) {
+ /* Direct event */
+ --pmc;
+ if (isbus && (byte & 2) &&
+ (psel == 8 || psel == 0x10 || psel == 0x28))
+ /* add events on higher-numbered bus */
+ mmcr1 |= 1ull << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
+ } else {
+ /* Instructions or run cycles on PMC5/6 */
+ --pmc;
+ }
+ if (isbus && unit == PM_GRS) {
+ bit = psel & 7;
+ grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
+ mmcr1 |= (u64)grsel << grsel_shift[bit];
+ }
+ if (power5p_marked_instr_event(event[i]))
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+ if ((psel & 0x58) == 0x40 && (byte & 1) != ((pmc >> 1) & 1))
+ /* select alternate byte lane */
+ psel |= 0x10;
+ if (pmc <= 3)
+ mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
+ hwc[i] = pmc;
+ }
+
+ /* Return MMCRx values */
+ mmcr[0] = 0;
+ if (pmc_inuse & 1)
+ mmcr[0] = MMCR0_PMC1CE;
+ if (pmc_inuse & 0x3e)
+ mmcr[0] |= MMCR0_PMCjCE;
+ mmcr[1] = mmcr1;
+ mmcr[2] = mmcra;
+ return 0;
+}
+
+static void power5p_disable_pmc(unsigned int pmc, u64 mmcr[])
+{
+ if (pmc <= 3)
+ mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
+}
+
+static int power5p_generic_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = 0xf,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x100009,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x1c10a8, /* LD_REF_L1 */
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x3c1088, /* LD_MISS_L1 */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x230e4, /* BR_ISSUED */
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x230e5, /* BR_MPRED_CR */
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power5p_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x1c10a8, 0x3c1088 },
+ [C(OP_WRITE)] = { 0x2c10a8, 0xc10c3 },
+ [C(OP_PREFETCH)] = { 0xc70e7, -1 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0xc50c3, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0xc20e4, 0x800c4 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x800c0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x230e4, 0x230e5 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
+struct power_pmu power5p_pmu = {
+ .n_counter = 6,
+ .max_alternatives = MAX_ALT,
+ .add_fields = 0x7000000000055ull,
+ .test_adder = 0x3000040000000ull,
+ .compute_mmcr = power5p_compute_mmcr,
+ .get_constraint = power5p_get_constraint,
+ .get_alternatives = power5p_get_alternatives,
+ .disable_pmc = power5p_disable_pmc,
+ .limited_pmc_event = power5p_limited_pmc_event,
+ .flags = PPMU_LIMITED_PMC5_6,
+ .n_generic = ARRAY_SIZE(power5p_generic_events),
+ .generic_events = power5p_generic_events,
+ .cache_events = &power5p_cache_events,
+};
--- /dev/null
+/*
+ * Performance counter support for POWER5 (not POWER5++) processors.
+ *
+ * Copyright 2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/perf_counter.h>
+#include <asm/reg.h>
+
+/*
+ * Bits in event code for POWER5 (not POWER5++)
+ */
+#define PM_PMC_SH 20 /* PMC number (1-based) for direct events */
+#define PM_PMC_MSK 0xf
+#define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH)
+#define PM_UNIT_SH 16 /* TTMMUX number and setting - unit select */
+#define PM_UNIT_MSK 0xf
+#define PM_BYTE_SH 12 /* Byte number of event bus to use */
+#define PM_BYTE_MSK 7
+#define PM_GRS_SH 8 /* Storage subsystem mux select */
+#define PM_GRS_MSK 7
+#define PM_BUSEVENT_MSK 0x80 /* Set if event uses event bus */
+#define PM_PMCSEL_MSK 0x7f
+
+/* Values in PM_UNIT field */
+#define PM_FPU 0
+#define PM_ISU0 1
+#define PM_IFU 2
+#define PM_ISU1 3
+#define PM_IDU 4
+#define PM_ISU0_ALT 6
+#define PM_GRS 7
+#define PM_LSU0 8
+#define PM_LSU1 0xc
+#define PM_LASTUNIT 0xc
+
+/*
+ * Bits in MMCR1 for POWER5
+ */
+#define MMCR1_TTM0SEL_SH 62
+#define MMCR1_TTM1SEL_SH 60
+#define MMCR1_TTM2SEL_SH 58
+#define MMCR1_TTM3SEL_SH 56
+#define MMCR1_TTMSEL_MSK 3
+#define MMCR1_TD_CP_DBG0SEL_SH 54
+#define MMCR1_TD_CP_DBG1SEL_SH 52
+#define MMCR1_TD_CP_DBG2SEL_SH 50
+#define MMCR1_TD_CP_DBG3SEL_SH 48
+#define MMCR1_GRS_L2SEL_SH 46
+#define MMCR1_GRS_L2SEL_MSK 3
+#define MMCR1_GRS_L3SEL_SH 44
+#define MMCR1_GRS_L3SEL_MSK 3
+#define MMCR1_GRS_MCSEL_SH 41
+#define MMCR1_GRS_MCSEL_MSK 7
+#define MMCR1_GRS_FABSEL_SH 39
+#define MMCR1_GRS_FABSEL_MSK 3
+#define MMCR1_PMC1_ADDER_SEL_SH 35
+#define MMCR1_PMC2_ADDER_SEL_SH 34
+#define MMCR1_PMC3_ADDER_SEL_SH 33
+#define MMCR1_PMC4_ADDER_SEL_SH 32
+#define MMCR1_PMC1SEL_SH 25
+#define MMCR1_PMC2SEL_SH 17
+#define MMCR1_PMC3SEL_SH 9
+#define MMCR1_PMC4SEL_SH 1
+#define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8)
+#define MMCR1_PMCSEL_MSK 0x7f
+
+/*
+ * Bits in MMCRA
+ */
+
+/*
+ * Layout of constraint bits:
+ * 6666555555555544444444443333333333222222222211111111110000000000
+ * 3210987654321098765432109876543210987654321098765432109876543210
+ * <><>[ ><><>< ><> [ >[ >[ >< >< >< >< ><><><><><><>
+ * T0T1 NC G0G1G2 G3 UC PS1PS2 B0 B1 B2 B3 P6P5P4P3P2P1
+ *
+ * T0 - TTM0 constraint
+ * 54-55: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0xc0_0000_0000_0000
+ *
+ * T1 - TTM1 constraint
+ * 52-53: TTM1SEL value (0=IDU, 3=GRS) 0x30_0000_0000_0000
+ *
+ * NC - number of counters
+ * 51: NC error 0x0008_0000_0000_0000
+ * 48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
+ *
+ * G0..G3 - GRS mux constraints
+ * 46-47: GRS_L2SEL value
+ * 44-45: GRS_L3SEL value
+ * 41-44: GRS_MCSEL value
+ * 39-40: GRS_FABSEL value
+ * Note that these match up with their bit positions in MMCR1
+ *
+ * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
+ * 37: UC3 error 0x20_0000_0000
+ * 36: FPU|IFU|ISU1 events needed 0x10_0000_0000
+ * 35: ISU0 events needed 0x08_0000_0000
+ * 34: IDU|GRS events needed 0x04_0000_0000
+ *
+ * PS1
+ * 33: PS1 error 0x2_0000_0000
+ * 31-32: count of events needing PMC1/2 0x1_8000_0000
+ *
+ * PS2
+ * 30: PS2 error 0x4000_0000
+ * 28-29: count of events needing PMC3/4 0x3000_0000
+ *
+ * B0
+ * 24-27: Byte 0 event source 0x0f00_0000
+ * Encoding as for the event code
+ *
+ * B1, B2, B3
+ * 20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
+ *
+ * P1..P6
+ * 0-11: Count of events needing PMC1..PMC6
+ */
+
+static const int grsel_shift[8] = {
+ MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
+ MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
+ MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
+};
+
+/* Masks and values for using events from the various units */
+static u64 unit_cons[PM_LASTUNIT+1][2] = {
+ [PM_FPU] = { 0xc0002000000000ull, 0x00001000000000ull },
+ [PM_ISU0] = { 0x00002000000000ull, 0x00000800000000ull },
+ [PM_ISU1] = { 0xc0002000000000ull, 0xc0001000000000ull },
+ [PM_IFU] = { 0xc0002000000000ull, 0x80001000000000ull },
+ [PM_IDU] = { 0x30002000000000ull, 0x00000400000000ull },
+ [PM_GRS] = { 0x30002000000000ull, 0x30000400000000ull },
+};
+
+static int power5_get_constraint(u64 event, u64 *maskp, u64 *valp)
+{
+ int pmc, byte, unit, sh;
+ int bit, fmask;
+ u64 mask = 0, value = 0;
+ int grp = -1;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 6)
+ return -1;
+ sh = (pmc - 1) * 2;
+ mask |= 2 << sh;
+ value |= 1 << sh;
+ if (pmc <= 4)
+ grp = (pmc - 1) >> 1;
+ else if (event != 0x500009 && event != 0x600005)
+ return -1;
+ }
+ if (event & PM_BUSEVENT_MSK) {
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ if (unit > PM_LASTUNIT)
+ return -1;
+ if (unit == PM_ISU0_ALT)
+ unit = PM_ISU0;
+ mask |= unit_cons[unit][0];
+ value |= unit_cons[unit][1];
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ if (byte >= 4) {
+ if (unit != PM_LSU1)
+ return -1;
+ /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
+ ++unit;
+ byte &= 3;
+ }
+ if (unit == PM_GRS) {
+ bit = event & 7;
+ fmask = (bit == 6)? 7: 3;
+ sh = grsel_shift[bit];
+ mask |= (u64)fmask << sh;
+ value |= (u64)((event >> PM_GRS_SH) & fmask) << sh;
+ }
+ /*
+ * Bus events on bytes 0 and 2 can be counted
+ * on PMC1/2; bytes 1 and 3 on PMC3/4.
+ */
+ if (!pmc)
+ grp = byte & 1;
+ /* Set byte lane select field */
+ mask |= 0xfULL << (24 - 4 * byte);
+ value |= (u64)unit << (24 - 4 * byte);
+ }
+ if (grp == 0) {
+ /* increment PMC1/2 field */
+ mask |= 0x200000000ull;
+ value |= 0x080000000ull;
+ } else if (grp == 1) {
+ /* increment PMC3/4 field */
+ mask |= 0x40000000ull;
+ value |= 0x10000000ull;
+ }
+ if (pmc < 5) {
+ /* need a counter from PMC1-4 set */
+ mask |= 0x8000000000000ull;
+ value |= 0x1000000000000ull;
+ }
+ *maskp = mask;
+ *valp = value;
+ return 0;
+}
+
+#define MAX_ALT 3 /* at most 3 alternatives for any event */
+
+static const unsigned int event_alternatives[][MAX_ALT] = {
+ { 0x120e4, 0x400002 }, /* PM_GRP_DISP_REJECT */
+ { 0x410c7, 0x441084 }, /* PM_THRD_L2MISS_BOTH_CYC */
+ { 0x100005, 0x600005 }, /* PM_RUN_CYC */
+ { 0x100009, 0x200009, 0x500009 }, /* PM_INST_CMPL */
+ { 0x300009, 0x400009 }, /* PM_INST_DISP */
+};
+
+/*
+ * Scan the alternatives table for a match and return the
+ * index into the alternatives table if found, else -1.
+ */
+static int find_alternative(u64 event)
+{
+ int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
+ if (event < event_alternatives[i][0])
+ break;
+ for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
+ if (event == event_alternatives[i][j])
+ return i;
+ }
+ return -1;
+}
+
+static const unsigned char bytedecode_alternatives[4][4] = {
+ /* PMC 1 */ { 0x21, 0x23, 0x25, 0x27 },
+ /* PMC 2 */ { 0x07, 0x17, 0x0e, 0x1e },
+ /* PMC 3 */ { 0x20, 0x22, 0x24, 0x26 },
+ /* PMC 4 */ { 0x07, 0x17, 0x0e, 0x1e }
+};
+
+/*
+ * Some direct events for decodes of event bus byte 3 have alternative
+ * PMCSEL values on other counters. This returns the alternative
+ * event code for those that do, or -1 otherwise.
+ */
+static s64 find_alternative_bdecode(u64 event)
+{
+ int pmc, altpmc, pp, j;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc == 0 || pmc > 4)
+ return -1;
+ altpmc = 5 - pmc; /* 1 <-> 4, 2 <-> 3 */
+ pp = event & PM_PMCSEL_MSK;
+ for (j = 0; j < 4; ++j) {
+ if (bytedecode_alternatives[pmc - 1][j] == pp) {
+ return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
+ (altpmc << PM_PMC_SH) |
+ bytedecode_alternatives[altpmc - 1][j];
+ }
+ }
+ return -1;
+}
+
+static int power5_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ int i, j, nalt = 1;
+ s64 ae;
+
+ alt[0] = event;
+ nalt = 1;
+ i = find_alternative(event);
+ if (i >= 0) {
+ for (j = 0; j < MAX_ALT; ++j) {
+ ae = event_alternatives[i][j];
+ if (ae && ae != event)
+ alt[nalt++] = ae;
+ }
+ } else {
+ ae = find_alternative_bdecode(event);
+ if (ae > 0)
+ alt[nalt++] = ae;
+ }
+ return nalt;
+}
+
+/*
+ * Map of which direct events on which PMCs are marked instruction events.
+ * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
+ * Bit 0 is set if it is marked for all PMCs.
+ * The 0x80 bit indicates a byte decode PMCSEL value.
+ */
+static unsigned char direct_event_is_marked[0x28] = {
+ 0, /* 00 */
+ 0x1f, /* 01 PM_IOPS_CMPL */
+ 0x2, /* 02 PM_MRK_GRP_DISP */
+ 0xe, /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
+ 0, /* 04 */
+ 0x1c, /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
+ 0x80, /* 06 */
+ 0x80, /* 07 */
+ 0, 0, 0,/* 08 - 0a */
+ 0x18, /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
+ 0, /* 0c */
+ 0x80, /* 0d */
+ 0x80, /* 0e */
+ 0, /* 0f */
+ 0, /* 10 */
+ 0x14, /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
+ 0, /* 12 */
+ 0x10, /* 13 PM_MRK_GRP_CMPL */
+ 0x1f, /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
+ 0x2, /* 15 PM_MRK_GRP_ISSUED */
+ 0x80, /* 16 */
+ 0x80, /* 17 */
+ 0, 0, 0, 0, 0,
+ 0x80, /* 1d */
+ 0x80, /* 1e */
+ 0, /* 1f */
+ 0x80, /* 20 */
+ 0x80, /* 21 */
+ 0x80, /* 22 */
+ 0x80, /* 23 */
+ 0x80, /* 24 */
+ 0x80, /* 25 */
+ 0x80, /* 26 */
+ 0x80, /* 27 */
+};
+
+/*
+ * Returns 1 if event counts things relating to marked instructions
+ * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
+ */
+static int power5_marked_instr_event(u64 event)
+{
+ int pmc, psel;
+ int bit, byte, unit;
+ u32 mask;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ psel = event & PM_PMCSEL_MSK;
+ if (pmc >= 5)
+ return 0;
+
+ bit = -1;
+ if (psel < sizeof(direct_event_is_marked)) {
+ if (direct_event_is_marked[psel] & (1 << pmc))
+ return 1;
+ if (direct_event_is_marked[psel] & 0x80)
+ bit = 4;
+ else if (psel == 0x08)
+ bit = pmc - 1;
+ else if (psel == 0x10)
+ bit = 4 - pmc;
+ else if (psel == 0x1b && (pmc == 1 || pmc == 3))
+ bit = 4;
+ } else if ((psel & 0x58) == 0x40)
+ bit = psel & 7;
+
+ if (!(event & PM_BUSEVENT_MSK))
+ return 0;
+
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ if (unit == PM_LSU0) {
+ /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
+ mask = 0x5dff00;
+ } else if (unit == PM_LSU1 && byte >= 4) {
+ byte -= 4;
+ /* byte 4 bits 1,3,5,7, byte 5 bits 6-7, byte 7 bits 0-4,6 */
+ mask = 0x5f00c0aa;
+ } else
+ return 0;
+
+ return (mask >> (byte * 8 + bit)) & 1;
+}
+
+static int power5_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], u64 mmcr[])
+{
+ u64 mmcr1 = 0;
+ u64 mmcra = 0;
+ unsigned int pmc, unit, byte, psel;
+ unsigned int ttm, grp;
+ int i, isbus, bit, grsel;
+ unsigned int pmc_inuse = 0;
+ unsigned int pmc_grp_use[2];
+ unsigned char busbyte[4];
+ unsigned char unituse[16];
+ int ttmuse;
+
+ if (n_ev > 6)
+ return -1;
+
+ /* First pass to count resource use */
+ pmc_grp_use[0] = pmc_grp_use[1] = 0;
+ memset(busbyte, 0, sizeof(busbyte));
+ memset(unituse, 0, sizeof(unituse));
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 6)
+ return -1;
+ if (pmc_inuse & (1 << (pmc - 1)))
+ return -1;
+ pmc_inuse |= 1 << (pmc - 1);
+ /* count 1/2 vs 3/4 use */
+ if (pmc <= 4)
+ ++pmc_grp_use[(pmc - 1) >> 1];
+ }
+ if (event[i] & PM_BUSEVENT_MSK) {
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ if (unit > PM_LASTUNIT)
+ return -1;
+ if (unit == PM_ISU0_ALT)
+ unit = PM_ISU0;
+ if (byte >= 4) {
+ if (unit != PM_LSU1)
+ return -1;
+ ++unit;
+ byte &= 3;
+ }
+ if (!pmc)
+ ++pmc_grp_use[byte & 1];
+ if (busbyte[byte] && busbyte[byte] != unit)
+ return -1;
+ busbyte[byte] = unit;
+ unituse[unit] = 1;
+ }
+ }
+ if (pmc_grp_use[0] > 2 || pmc_grp_use[1] > 2)
+ return -1;
+
+ /*
+ * Assign resources and set multiplexer selects.
+ *
+ * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
+ * choice we have to deal with.
+ */
+ if (unituse[PM_ISU0] &
+ (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
+ unituse[PM_ISU0_ALT] = 1; /* move ISU to TTM1 */
+ unituse[PM_ISU0] = 0;
+ }
+ /* Set TTM[01]SEL fields. */
+ ttmuse = 0;
+ for (i = PM_FPU; i <= PM_ISU1; ++i) {
+ if (!unituse[i])
+ continue;
+ if (ttmuse++)
+ return -1;
+ mmcr1 |= (u64)i << MMCR1_TTM0SEL_SH;
+ }
+ ttmuse = 0;
+ for (; i <= PM_GRS; ++i) {
+ if (!unituse[i])
+ continue;
+ if (ttmuse++)
+ return -1;
+ mmcr1 |= (u64)(i & 3) << MMCR1_TTM1SEL_SH;
+ }
+ if (ttmuse > 1)
+ return -1;
+
+ /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
+ for (byte = 0; byte < 4; ++byte) {
+ unit = busbyte[byte];
+ if (!unit)
+ continue;
+ if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
+ /* get ISU0 through TTM1 rather than TTM0 */
+ unit = PM_ISU0_ALT;
+ } else if (unit == PM_LSU1 + 1) {
+ /* select lower word of LSU1 for this byte */
+ mmcr1 |= 1ull << (MMCR1_TTM3SEL_SH + 3 - byte);
+ }
+ ttm = unit >> 2;
+ mmcr1 |= (u64)ttm << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
+ }
+
+ /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ psel = event[i] & PM_PMCSEL_MSK;
+ isbus = event[i] & PM_BUSEVENT_MSK;
+ if (!pmc) {
+ /* Bus event or any-PMC direct event */
+ for (pmc = 0; pmc < 4; ++pmc) {
+ if (pmc_inuse & (1 << pmc))
+ continue;
+ grp = (pmc >> 1) & 1;
+ if (isbus) {
+ if (grp == (byte & 1))
+ break;
+ } else if (pmc_grp_use[grp] < 2) {
+ ++pmc_grp_use[grp];
+ break;
+ }
+ }
+ pmc_inuse |= 1 << pmc;
+ } else if (pmc <= 4) {
+ /* Direct event */
+ --pmc;
+ if ((psel == 8 || psel == 0x10) && isbus && (byte & 2))
+ /* add events on higher-numbered bus */
+ mmcr1 |= 1ull << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
+ } else {
+ /* Instructions or run cycles on PMC5/6 */
+ --pmc;
+ }
+ if (isbus && unit == PM_GRS) {
+ bit = psel & 7;
+ grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
+ mmcr1 |= (u64)grsel << grsel_shift[bit];
+ }
+ if (power5_marked_instr_event(event[i]))
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+ if (pmc <= 3)
+ mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
+ hwc[i] = pmc;
+ }
+
+ /* Return MMCRx values */
+ mmcr[0] = 0;
+ if (pmc_inuse & 1)
+ mmcr[0] = MMCR0_PMC1CE;
+ if (pmc_inuse & 0x3e)
+ mmcr[0] |= MMCR0_PMCjCE;
+ mmcr[1] = mmcr1;
+ mmcr[2] = mmcra;
+ return 0;
+}
+
+static void power5_disable_pmc(unsigned int pmc, u64 mmcr[])
+{
+ if (pmc <= 3)
+ mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
+}
+
+static int power5_generic_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = 0xf,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x100009,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x4c1090, /* LD_REF_L1 */
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x3c1088, /* LD_MISS_L1 */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x230e4, /* BR_ISSUED */
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x230e5, /* BR_MPRED_CR */
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power5_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x4c1090, 0x3c1088 },
+ [C(OP_WRITE)] = { 0x3c1090, 0xc10c3 },
+ [C(OP_PREFETCH)] = { 0xc70e7, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x3c309b },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0xc50c3, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x2c4090, 0x800c4 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x800c0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x230e4, 0x230e5 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
+struct power_pmu power5_pmu = {
+ .n_counter = 6,
+ .max_alternatives = MAX_ALT,
+ .add_fields = 0x7000090000555ull,
+ .test_adder = 0x3000490000000ull,
+ .compute_mmcr = power5_compute_mmcr,
+ .get_constraint = power5_get_constraint,
+ .get_alternatives = power5_get_alternatives,
+ .disable_pmc = power5_disable_pmc,
+ .n_generic = ARRAY_SIZE(power5_generic_events),
+ .generic_events = power5_generic_events,
+ .cache_events = &power5_cache_events,
+};
--- /dev/null
+/*
+ * Performance counter support for POWER6 processors.
+ *
+ * Copyright 2008-2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/perf_counter.h>
+#include <asm/reg.h>
+
+/*
+ * Bits in event code for POWER6
+ */
+#define PM_PMC_SH 20 /* PMC number (1-based) for direct events */
+#define PM_PMC_MSK 0x7
+#define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH)
+#define PM_UNIT_SH 16 /* Unit event comes (TTMxSEL encoding) */
+#define PM_UNIT_MSK 0xf
+#define PM_UNIT_MSKS (PM_UNIT_MSK << PM_UNIT_SH)
+#define PM_LLAV 0x8000 /* Load lookahead match value */
+#define PM_LLA 0x4000 /* Load lookahead match enable */
+#define PM_BYTE_SH 12 /* Byte of event bus to use */
+#define PM_BYTE_MSK 3
+#define PM_SUBUNIT_SH 8 /* Subunit event comes from (NEST_SEL enc.) */
+#define PM_SUBUNIT_MSK 7
+#define PM_SUBUNIT_MSKS (PM_SUBUNIT_MSK << PM_SUBUNIT_SH)
+#define PM_PMCSEL_MSK 0xff /* PMCxSEL value */
+#define PM_BUSEVENT_MSK 0xf3700
+
+/*
+ * Bits in MMCR1 for POWER6
+ */
+#define MMCR1_TTM0SEL_SH 60
+#define MMCR1_TTMSEL_SH(n) (MMCR1_TTM0SEL_SH - (n) * 4)
+#define MMCR1_TTMSEL_MSK 0xf
+#define MMCR1_TTMSEL(m, n) (((m) >> MMCR1_TTMSEL_SH(n)) & MMCR1_TTMSEL_MSK)
+#define MMCR1_NESTSEL_SH 45
+#define MMCR1_NESTSEL_MSK 0x7
+#define MMCR1_NESTSEL(m) (((m) >> MMCR1_NESTSEL_SH) & MMCR1_NESTSEL_MSK)
+#define MMCR1_PMC1_LLA ((u64)1 << 44)
+#define MMCR1_PMC1_LLA_VALUE ((u64)1 << 39)
+#define MMCR1_PMC1_ADDR_SEL ((u64)1 << 35)
+#define MMCR1_PMC1SEL_SH 24
+#define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8)
+#define MMCR1_PMCSEL_MSK 0xff
+
+/*
+ * Map of which direct events on which PMCs are marked instruction events.
+ * Indexed by PMCSEL value >> 1.
+ * Bottom 4 bits are a map of which PMCs are interesting,
+ * top 4 bits say what sort of event:
+ * 0 = direct marked event,
+ * 1 = byte decode event,
+ * 4 = add/and event (PMC1 -> bits 0 & 4),
+ * 5 = add/and event (PMC1 -> bits 1 & 5),
+ * 6 = add/and event (PMC1 -> bits 2 & 6),
+ * 7 = add/and event (PMC1 -> bits 3 & 7).
+ */
+static unsigned char direct_event_is_marked[0x60 >> 1] = {
+ 0, /* 00 */
+ 0, /* 02 */
+ 0, /* 04 */
+ 0x07, /* 06 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
+ 0x04, /* 08 PM_MRK_DFU_FIN */
+ 0x06, /* 0a PM_MRK_IFU_FIN, PM_MRK_INST_FIN */
+ 0, /* 0c */
+ 0, /* 0e */
+ 0x02, /* 10 PM_MRK_INST_DISP */
+ 0x08, /* 12 PM_MRK_LSU_DERAT_MISS */
+ 0, /* 14 */
+ 0, /* 16 */
+ 0x0c, /* 18 PM_THRESH_TIMEO, PM_MRK_INST_FIN */
+ 0x0f, /* 1a PM_MRK_INST_DISP, PM_MRK_{FXU,FPU,LSU}_FIN */
+ 0x01, /* 1c PM_MRK_INST_ISSUED */
+ 0, /* 1e */
+ 0, /* 20 */
+ 0, /* 22 */
+ 0, /* 24 */
+ 0, /* 26 */
+ 0x15, /* 28 PM_MRK_DATA_FROM_L2MISS, PM_MRK_DATA_FROM_L3MISS */
+ 0, /* 2a */
+ 0, /* 2c */
+ 0, /* 2e */
+ 0x4f, /* 30 */
+ 0x7f, /* 32 */
+ 0x4f, /* 34 */
+ 0x5f, /* 36 */
+ 0x6f, /* 38 */
+ 0x4f, /* 3a */
+ 0, /* 3c */
+ 0x08, /* 3e PM_MRK_INST_TIMEO */
+ 0x1f, /* 40 */
+ 0x1f, /* 42 */
+ 0x1f, /* 44 */
+ 0x1f, /* 46 */
+ 0x1f, /* 48 */
+ 0x1f, /* 4a */
+ 0x1f, /* 4c */
+ 0x1f, /* 4e */
+ 0, /* 50 */
+ 0x05, /* 52 PM_MRK_BR_TAKEN, PM_MRK_BR_MPRED */
+ 0x1c, /* 54 PM_MRK_PTEG_FROM_L3MISS, PM_MRK_PTEG_FROM_L2MISS */
+ 0x02, /* 56 PM_MRK_LD_MISS_L1 */
+ 0, /* 58 */
+ 0, /* 5a */
+ 0, /* 5c */
+ 0, /* 5e */
+};
+
+/*
+ * Masks showing for each unit which bits are marked events.
+ * These masks are in LE order, i.e. 0x00000001 is byte 0, bit 0.
+ */
+static u32 marked_bus_events[16] = {
+ 0x01000000, /* direct events set 1: byte 3 bit 0 */
+ 0x00010000, /* direct events set 2: byte 2 bit 0 */
+ 0, 0, 0, 0, /* IDU, IFU, nest: nothing */
+ 0x00000088, /* VMX set 1: byte 0 bits 3, 7 */
+ 0x000000c0, /* VMX set 2: byte 0 bits 4-7 */
+ 0x04010000, /* LSU set 1: byte 2 bit 0, byte 3 bit 2 */
+ 0xff010000u, /* LSU set 2: byte 2 bit 0, all of byte 3 */
+ 0, /* LSU set 3 */
+ 0x00000010, /* VMX set 3: byte 0 bit 4 */
+ 0, /* BFP set 1 */
+ 0x00000022, /* BFP set 2: byte 0 bits 1, 5 */
+ 0, 0
+};
+
+/*
+ * Returns 1 if event counts things relating to marked instructions
+ * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
+ */
+static int power6_marked_instr_event(u64 event)
+{
+ int pmc, psel, ptype;
+ int bit, byte, unit;
+ u32 mask;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ psel = (event & PM_PMCSEL_MSK) >> 1; /* drop edge/level bit */
+ if (pmc >= 5)
+ return 0;
+
+ bit = -1;
+ if (psel < sizeof(direct_event_is_marked)) {
+ ptype = direct_event_is_marked[psel];
+ if (pmc == 0 || !(ptype & (1 << (pmc - 1))))
+ return 0;
+ ptype >>= 4;
+ if (ptype == 0)
+ return 1;
+ if (ptype == 1)
+ bit = 0;
+ else
+ bit = ptype ^ (pmc - 1);
+ } else if ((psel & 0x48) == 0x40)
+ bit = psel & 7;
+
+ if (!(event & PM_BUSEVENT_MSK) || bit == -1)
+ return 0;
+
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ mask = marked_bus_events[unit];
+ return (mask >> (byte * 8 + bit)) & 1;
+}
+
+/*
+ * Assign PMC numbers and compute MMCR1 value for a set of events
+ */
+static int p6_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], u64 mmcr[])
+{
+ u64 mmcr1 = 0;
+ u64 mmcra = 0;
+ int i;
+ unsigned int pmc, ev, b, u, s, psel;
+ unsigned int ttmset = 0;
+ unsigned int pmc_inuse = 0;
+
+ if (n_ev > 6)
+ return -1;
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc_inuse & (1 << (pmc - 1)))
+ return -1; /* collision! */
+ pmc_inuse |= 1 << (pmc - 1);
+ }
+ }
+ for (i = 0; i < n_ev; ++i) {
+ ev = event[i];
+ pmc = (ev >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ --pmc;
+ } else {
+ /* can go on any PMC; find a free one */
+ for (pmc = 0; pmc < 4; ++pmc)
+ if (!(pmc_inuse & (1 << pmc)))
+ break;
+ if (pmc >= 4)
+ return -1;
+ pmc_inuse |= 1 << pmc;
+ }
+ hwc[i] = pmc;
+ psel = ev & PM_PMCSEL_MSK;
+ if (ev & PM_BUSEVENT_MSK) {
+ /* this event uses the event bus */
+ b = (ev >> PM_BYTE_SH) & PM_BYTE_MSK;
+ u = (ev >> PM_UNIT_SH) & PM_UNIT_MSK;
+ /* check for conflict on this byte of event bus */
+ if ((ttmset & (1 << b)) && MMCR1_TTMSEL(mmcr1, b) != u)
+ return -1;
+ mmcr1 |= (u64)u << MMCR1_TTMSEL_SH(b);
+ ttmset |= 1 << b;
+ if (u == 5) {
+ /* Nest events have a further mux */
+ s = (ev >> PM_SUBUNIT_SH) & PM_SUBUNIT_MSK;
+ if ((ttmset & 0x10) &&
+ MMCR1_NESTSEL(mmcr1) != s)
+ return -1;
+ ttmset |= 0x10;
+ mmcr1 |= (u64)s << MMCR1_NESTSEL_SH;
+ }
+ if (0x30 <= psel && psel <= 0x3d) {
+ /* these need the PMCx_ADDR_SEL bits */
+ if (b >= 2)
+ mmcr1 |= MMCR1_PMC1_ADDR_SEL >> pmc;
+ }
+ /* bus select values are different for PMC3/4 */
+ if (pmc >= 2 && (psel & 0x90) == 0x80)
+ psel ^= 0x20;
+ }
+ if (ev & PM_LLA) {
+ mmcr1 |= MMCR1_PMC1_LLA >> pmc;
+ if (ev & PM_LLAV)
+ mmcr1 |= MMCR1_PMC1_LLA_VALUE >> pmc;
+ }
+ if (power6_marked_instr_event(event[i]))
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+ if (pmc < 4)
+ mmcr1 |= (u64)psel << MMCR1_PMCSEL_SH(pmc);
+ }
+ mmcr[0] = 0;
+ if (pmc_inuse & 1)
+ mmcr[0] = MMCR0_PMC1CE;
+ if (pmc_inuse & 0xe)
+ mmcr[0] |= MMCR0_PMCjCE;
+ mmcr[1] = mmcr1;
+ mmcr[2] = mmcra;
+ return 0;
+}
+
+/*
+ * Layout of constraint bits:
+ *
+ * 0-1 add field: number of uses of PMC1 (max 1)
+ * 2-3, 4-5, 6-7, 8-9, 10-11: ditto for PMC2, 3, 4, 5, 6
+ * 12-15 add field: number of uses of PMC1-4 (max 4)
+ * 16-19 select field: unit on byte 0 of event bus
+ * 20-23, 24-27, 28-31 ditto for bytes 1, 2, 3
+ * 32-34 select field: nest (subunit) event selector
+ */
+static int p6_get_constraint(u64 event, u64 *maskp, u64 *valp)
+{
+ int pmc, byte, sh, subunit;
+ u64 mask = 0, value = 0;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 4 && !(event == 0x500009 || event == 0x600005))
+ return -1;
+ sh = (pmc - 1) * 2;
+ mask |= 2 << sh;
+ value |= 1 << sh;
+ }
+ if (event & PM_BUSEVENT_MSK) {
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ sh = byte * 4 + (16 - PM_UNIT_SH);
+ mask |= PM_UNIT_MSKS << sh;
+ value |= (u64)(event & PM_UNIT_MSKS) << sh;
+ if ((event & PM_UNIT_MSKS) == (5 << PM_UNIT_SH)) {
+ subunit = (event >> PM_SUBUNIT_SH) & PM_SUBUNIT_MSK;
+ mask |= (u64)PM_SUBUNIT_MSK << 32;
+ value |= (u64)subunit << 32;
+ }
+ }
+ if (pmc <= 4) {
+ mask |= 0x8000; /* add field for count of PMC1-4 uses */
+ value |= 0x1000;
+ }
+ *maskp = mask;
+ *valp = value;
+ return 0;
+}
+
+static int p6_limited_pmc_event(u64 event)
+{
+ int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+
+ return pmc == 5 || pmc == 6;
+}
+
+#define MAX_ALT 4 /* at most 4 alternatives for any event */
+
+static const unsigned int event_alternatives[][MAX_ALT] = {
+ { 0x0130e8, 0x2000f6, 0x3000fc }, /* PM_PTEG_RELOAD_VALID */
+ { 0x080080, 0x10000d, 0x30000c, 0x4000f0 }, /* PM_LD_MISS_L1 */
+ { 0x080088, 0x200054, 0x3000f0 }, /* PM_ST_MISS_L1 */
+ { 0x10000a, 0x2000f4, 0x600005 }, /* PM_RUN_CYC */
+ { 0x10000b, 0x2000f5 }, /* PM_RUN_COUNT */
+ { 0x10000e, 0x400010 }, /* PM_PURR */
+ { 0x100010, 0x4000f8 }, /* PM_FLUSH */
+ { 0x10001a, 0x200010 }, /* PM_MRK_INST_DISP */
+ { 0x100026, 0x3000f8 }, /* PM_TB_BIT_TRANS */
+ { 0x100054, 0x2000f0 }, /* PM_ST_FIN */
+ { 0x100056, 0x2000fc }, /* PM_L1_ICACHE_MISS */
+ { 0x1000f0, 0x40000a }, /* PM_INST_IMC_MATCH_CMPL */
+ { 0x1000f8, 0x200008 }, /* PM_GCT_EMPTY_CYC */
+ { 0x1000fc, 0x400006 }, /* PM_LSU_DERAT_MISS_CYC */
+ { 0x20000e, 0x400007 }, /* PM_LSU_DERAT_MISS */
+ { 0x200012, 0x300012 }, /* PM_INST_DISP */
+ { 0x2000f2, 0x3000f2 }, /* PM_INST_DISP */
+ { 0x2000f8, 0x300010 }, /* PM_EXT_INT */
+ { 0x2000fe, 0x300056 }, /* PM_DATA_FROM_L2MISS */
+ { 0x2d0030, 0x30001a }, /* PM_MRK_FPU_FIN */
+ { 0x30000a, 0x400018 }, /* PM_MRK_INST_FIN */
+ { 0x3000f6, 0x40000e }, /* PM_L1_DCACHE_RELOAD_VALID */
+ { 0x3000fe, 0x400056 }, /* PM_DATA_FROM_L3MISS */
+};
+
+/*
+ * This could be made more efficient with a binary search on
+ * a presorted list, if necessary
+ */
+static int find_alternatives_list(u64 event)
+{
+ int i, j;
+ unsigned int alt;
+
+ for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
+ if (event < event_alternatives[i][0])
+ return -1;
+ for (j = 0; j < MAX_ALT; ++j) {
+ alt = event_alternatives[i][j];
+ if (!alt || event < alt)
+ break;
+ if (event == alt)
+ return i;
+ }
+ }
+ return -1;
+}
+
+static int p6_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ int i, j, nlim;
+ unsigned int psel, pmc;
+ unsigned int nalt = 1;
+ u64 aevent;
+
+ alt[0] = event;
+ nlim = p6_limited_pmc_event(event);
+
+ /* check the alternatives table */
+ i = find_alternatives_list(event);
+ if (i >= 0) {
+ /* copy out alternatives from list */
+ for (j = 0; j < MAX_ALT; ++j) {
+ aevent = event_alternatives[i][j];
+ if (!aevent)
+ break;
+ if (aevent != event)
+ alt[nalt++] = aevent;
+ nlim += p6_limited_pmc_event(aevent);
+ }
+
+ } else {
+ /* Check for alternative ways of computing sum events */
+ /* PMCSEL 0x32 counter N == PMCSEL 0x34 counter 5-N */
+ psel = event & (PM_PMCSEL_MSK & ~1); /* ignore edge bit */
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc && (psel == 0x32 || psel == 0x34))
+ alt[nalt++] = ((event ^ 0x6) & ~PM_PMC_MSKS) |
+ ((5 - pmc) << PM_PMC_SH);
+
+ /* PMCSEL 0x38 counter N == PMCSEL 0x3a counter N+/-2 */
+ if (pmc && (psel == 0x38 || psel == 0x3a))
+ alt[nalt++] = ((event ^ 0x2) & ~PM_PMC_MSKS) |
+ ((pmc > 2? pmc - 2: pmc + 2) << PM_PMC_SH);
+ }
+
+ if (flags & PPMU_ONLY_COUNT_RUN) {
+ /*
+ * We're only counting in RUN state,
+ * so PM_CYC is equivalent to PM_RUN_CYC,
+ * PM_INST_CMPL === PM_RUN_INST_CMPL, PM_PURR === PM_RUN_PURR.
+ * This doesn't include alternatives that don't provide
+ * any extra flexibility in assigning PMCs (e.g.
+ * 0x10000a for PM_RUN_CYC vs. 0x1e for PM_CYC).
+ * Note that even with these additional alternatives
+ * we never end up with more than 4 alternatives for any event.
+ */
+ j = nalt;
+ for (i = 0; i < nalt; ++i) {
+ switch (alt[i]) {
+ case 0x1e: /* PM_CYC */
+ alt[j++] = 0x600005; /* PM_RUN_CYC */
+ ++nlim;
+ break;
+ case 0x10000a: /* PM_RUN_CYC */
+ alt[j++] = 0x1e; /* PM_CYC */
+ break;
+ case 2: /* PM_INST_CMPL */
+ alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */
+ ++nlim;
+ break;
+ case 0x500009: /* PM_RUN_INST_CMPL */
+ alt[j++] = 2; /* PM_INST_CMPL */
+ break;
+ case 0x10000e: /* PM_PURR */
+ alt[j++] = 0x4000f4; /* PM_RUN_PURR */
+ break;
+ case 0x4000f4: /* PM_RUN_PURR */
+ alt[j++] = 0x10000e; /* PM_PURR */
+ break;
+ }
+ }
+ nalt = j;
+ }
+
+ if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) {
+ /* remove the limited PMC events */
+ j = 0;
+ for (i = 0; i < nalt; ++i) {
+ if (!p6_limited_pmc_event(alt[i])) {
+ alt[j] = alt[i];
+ ++j;
+ }
+ }
+ nalt = j;
+ } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) {
+ /* remove all but the limited PMC events */
+ j = 0;
+ for (i = 0; i < nalt; ++i) {
+ if (p6_limited_pmc_event(alt[i])) {
+ alt[j] = alt[i];
+ ++j;
+ }
+ }
+ nalt = j;
+ }
+
+ return nalt;
+}
+
+static void p6_disable_pmc(unsigned int pmc, u64 mmcr[])
+{
+ /* Set PMCxSEL to 0 to disable PMCx */
+ if (pmc <= 3)
+ mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SH(pmc));
+}
+
+static int power6_generic_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = 0x1e,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 2,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x280030, /* LD_REF_L1 */
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x30000c, /* LD_MISS_L1 */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x410a0, /* BR_PRED */
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x400052, /* BR_MPRED */
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ * The "DTLB" and "ITLB" events relate to the DERAT and IERAT.
+ */
+static int power6_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x80082, 0x80080 },
+ [C(OP_WRITE)] = { 0x80086, 0x80088 },
+ [C(OP_PREFETCH)] = { 0x810a4, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x100056 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0x4008c, 0 },
+ },
+ [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x150730, 0x250532 },
+ [C(OP_WRITE)] = { 0x250432, 0x150432 },
+ [C(OP_PREFETCH)] = { 0x810a6, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x20000e },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x420ce },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x430e6, 0x400052 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
+struct power_pmu power6_pmu = {
+ .n_counter = 6,
+ .max_alternatives = MAX_ALT,
+ .add_fields = 0x1555,
+ .test_adder = 0x3000,
+ .compute_mmcr = p6_compute_mmcr,
+ .get_constraint = p6_get_constraint,
+ .get_alternatives = p6_get_alternatives,
+ .disable_pmc = p6_disable_pmc,
+ .limited_pmc_event = p6_limited_pmc_event,
+ .flags = PPMU_LIMITED_PMC5_6 | PPMU_ALT_SIPR,
+ .n_generic = ARRAY_SIZE(power6_generic_events),
+ .generic_events = power6_generic_events,
+ .cache_events = &power6_cache_events,
+};
--- /dev/null
+/*
+ * Performance counter support for POWER7 processors.
+ *
+ * Copyright 2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/perf_counter.h>
+#include <asm/reg.h>
+
+/*
+ * Bits in event code for POWER7
+ */
+#define PM_PMC_SH 16 /* PMC number (1-based) for direct events */
+#define PM_PMC_MSK 0xf
+#define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH)
+#define PM_UNIT_SH 12 /* TTMMUX number and setting - unit select */
+#define PM_UNIT_MSK 0xf
+#define PM_COMBINE_SH 11 /* Combined event bit */
+#define PM_COMBINE_MSK 1
+#define PM_COMBINE_MSKS 0x800
+#define PM_L2SEL_SH 8 /* L2 event select */
+#define PM_L2SEL_MSK 7
+#define PM_PMCSEL_MSK 0xff
+
+/*
+ * Bits in MMCR1 for POWER7
+ */
+#define MMCR1_TTM0SEL_SH 60
+#define MMCR1_TTM1SEL_SH 56
+#define MMCR1_TTM2SEL_SH 52
+#define MMCR1_TTM3SEL_SH 48
+#define MMCR1_TTMSEL_MSK 0xf
+#define MMCR1_L2SEL_SH 45
+#define MMCR1_L2SEL_MSK 7
+#define MMCR1_PMC1_COMBINE_SH 35
+#define MMCR1_PMC2_COMBINE_SH 34
+#define MMCR1_PMC3_COMBINE_SH 33
+#define MMCR1_PMC4_COMBINE_SH 32
+#define MMCR1_PMC1SEL_SH 24
+#define MMCR1_PMC2SEL_SH 16
+#define MMCR1_PMC3SEL_SH 8
+#define MMCR1_PMC4SEL_SH 0
+#define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8)
+#define MMCR1_PMCSEL_MSK 0xff
+
+/*
+ * Bits in MMCRA
+ */
+
+/*
+ * Layout of constraint bits:
+ * 6666555555555544444444443333333333222222222211111111110000000000
+ * 3210987654321098765432109876543210987654321098765432109876543210
+ * [ ><><><><><><>
+ * NC P6P5P4P3P2P1
+ *
+ * NC - number of counters
+ * 15: NC error 0x8000
+ * 12-14: number of events needing PMC1-4 0x7000
+ *
+ * P6
+ * 11: P6 error 0x800
+ * 10-11: Count of events needing PMC6
+ *
+ * P1..P5
+ * 0-9: Count of events needing PMC1..PMC5
+ */
+
+static int power7_get_constraint(u64 event, u64 *maskp, u64 *valp)
+{
+ int pmc, sh;
+ u64 mask = 0, value = 0;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 6)
+ return -1;
+ sh = (pmc - 1) * 2;
+ mask |= 2 << sh;
+ value |= 1 << sh;
+ if (pmc >= 5 && !(event == 0x500fa || event == 0x600f4))
+ return -1;
+ }
+ if (pmc < 5) {
+ /* need a counter from PMC1-4 set */
+ mask |= 0x8000;
+ value |= 0x1000;
+ }
+ *maskp = mask;
+ *valp = value;
+ return 0;
+}
+
+#define MAX_ALT 2 /* at most 2 alternatives for any event */
+
+static const unsigned int event_alternatives[][MAX_ALT] = {
+ { 0x200f2, 0x300f2 }, /* PM_INST_DISP */
+ { 0x200f4, 0x600f4 }, /* PM_RUN_CYC */
+ { 0x400fa, 0x500fa }, /* PM_RUN_INST_CMPL */
+};
+
+/*
+ * Scan the alternatives table for a match and return the
+ * index into the alternatives table if found, else -1.
+ */
+static int find_alternative(u64 event)
+{
+ int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
+ if (event < event_alternatives[i][0])
+ break;
+ for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
+ if (event == event_alternatives[i][j])
+ return i;
+ }
+ return -1;
+}
+
+static s64 find_alternative_decode(u64 event)
+{
+ int pmc, psel;
+
+ /* this only handles the 4x decode events */
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ psel = event & PM_PMCSEL_MSK;
+ if ((pmc == 2 || pmc == 4) && (psel & ~7) == 0x40)
+ return event - (1 << PM_PMC_SH) + 8;
+ if ((pmc == 1 || pmc == 3) && (psel & ~7) == 0x48)
+ return event + (1 << PM_PMC_SH) - 8;
+ return -1;
+}
+
+static int power7_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ int i, j, nalt = 1;
+ s64 ae;
+
+ alt[0] = event;
+ nalt = 1;
+ i = find_alternative(event);
+ if (i >= 0) {
+ for (j = 0; j < MAX_ALT; ++j) {
+ ae = event_alternatives[i][j];
+ if (ae && ae != event)
+ alt[nalt++] = ae;
+ }
+ } else {
+ ae = find_alternative_decode(event);
+ if (ae > 0)
+ alt[nalt++] = ae;
+ }
+
+ if (flags & PPMU_ONLY_COUNT_RUN) {
+ /*
+ * We're only counting in RUN state,
+ * so PM_CYC is equivalent to PM_RUN_CYC
+ * and PM_INST_CMPL === PM_RUN_INST_CMPL.
+ * This doesn't include alternatives that don't provide
+ * any extra flexibility in assigning PMCs.
+ */
+ j = nalt;
+ for (i = 0; i < nalt; ++i) {
+ switch (alt[i]) {
+ case 0x1e: /* PM_CYC */
+ alt[j++] = 0x600f4; /* PM_RUN_CYC */
+ break;
+ case 0x600f4: /* PM_RUN_CYC */
+ alt[j++] = 0x1e;
+ break;
+ case 0x2: /* PM_PPC_CMPL */
+ alt[j++] = 0x500fa; /* PM_RUN_INST_CMPL */
+ break;
+ case 0x500fa: /* PM_RUN_INST_CMPL */
+ alt[j++] = 0x2; /* PM_PPC_CMPL */
+ break;
+ }
+ }
+ nalt = j;
+ }
+
+ return nalt;
+}
+
+/*
+ * Returns 1 if event counts things relating to marked instructions
+ * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
+ */
+static int power7_marked_instr_event(u64 event)
+{
+ int pmc, psel;
+ int unit;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ psel = event & PM_PMCSEL_MSK & ~1; /* trim off edge/level bit */
+ if (pmc >= 5)
+ return 0;
+
+ switch (psel >> 4) {
+ case 2:
+ return pmc == 2 || pmc == 4;
+ case 3:
+ if (psel == 0x3c)
+ return pmc == 1;
+ if (psel == 0x3e)
+ return pmc != 2;
+ return 1;
+ case 4:
+ case 5:
+ return unit == 0xd;
+ case 6:
+ if (psel == 0x64)
+ return pmc >= 3;
+ case 8:
+ return unit == 0xd;
+ }
+ return 0;
+}
+
+static int power7_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], u64 mmcr[])
+{
+ u64 mmcr1 = 0;
+ u64 mmcra = 0;
+ unsigned int pmc, unit, combine, l2sel, psel;
+ unsigned int pmc_inuse = 0;
+ int i;
+
+ /* First pass to count resource use */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 6)
+ return -1;
+ if (pmc_inuse & (1 << (pmc - 1)))
+ return -1;
+ pmc_inuse |= 1 << (pmc - 1);
+ }
+ }
+
+ /* Second pass: assign PMCs, set all MMCR1 fields */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ combine = (event[i] >> PM_COMBINE_SH) & PM_COMBINE_MSK;
+ l2sel = (event[i] >> PM_L2SEL_SH) & PM_L2SEL_MSK;
+ psel = event[i] & PM_PMCSEL_MSK;
+ if (!pmc) {
+ /* Bus event or any-PMC direct event */
+ for (pmc = 0; pmc < 4; ++pmc) {
+ if (!(pmc_inuse & (1 << pmc)))
+ break;
+ }
+ if (pmc >= 4)
+ return -1;
+ pmc_inuse |= 1 << pmc;
+ } else {
+ /* Direct or decoded event */
+ --pmc;
+ }
+ if (pmc <= 3) {
+ mmcr1 |= (u64) unit << (MMCR1_TTM0SEL_SH - 4 * pmc);
+ mmcr1 |= (u64) combine << (MMCR1_PMC1_COMBINE_SH - pmc);
+ mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
+ if (unit == 6) /* L2 events */
+ mmcr1 |= (u64) l2sel << MMCR1_L2SEL_SH;
+ }
+ if (power7_marked_instr_event(event[i]))
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+ hwc[i] = pmc;
+ }
+
+ /* Return MMCRx values */
+ mmcr[0] = 0;
+ if (pmc_inuse & 1)
+ mmcr[0] = MMCR0_PMC1CE;
+ if (pmc_inuse & 0x3e)
+ mmcr[0] |= MMCR0_PMCjCE;
+ mmcr[1] = mmcr1;
+ mmcr[2] = mmcra;
+ return 0;
+}
+
+static void power7_disable_pmc(unsigned int pmc, u64 mmcr[])
+{
+ if (pmc <= 3)
+ mmcr[1] &= ~(0xffULL << MMCR1_PMCSEL_SH(pmc));
+}
+
+static int power7_generic_events[] = {
+ [PERF_COUNT_CPU_CYCLES] = 0x1e,
+ [PERF_COUNT_INSTRUCTIONS] = 2,
+ [PERF_COUNT_CACHE_REFERENCES] = 0xc880, /* LD_REF_L1_LSU */
+ [PERF_COUNT_CACHE_MISSES] = 0x400f0, /* LD_MISS_L1 */
+ [PERF_COUNT_BRANCH_INSTRUCTIONS] = 0x10068, /* BRU_FIN */
+ [PERF_COUNT_BRANCH_MISSES] = 0x400f6, /* BR_MPRED */
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power7_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x400f0, 0xc880 },
+ [C(OP_WRITE)] = { 0, 0x300f0 },
+ [C(OP_PREFETCH)] = { 0xd8b8, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x200fc },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0x408a, 0 },
+ },
+ [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x6080, 0x6084 },
+ [C(OP_WRITE)] = { 0x6082, 0x6086 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x300fc },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x400fc },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x10068, 0x400f6 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
+struct power_pmu power7_pmu = {
+ .n_counter = 6,
+ .max_alternatives = MAX_ALT + 1,
+ .add_fields = 0x1555ull,
+ .test_adder = 0x3000ull,
+ .compute_mmcr = power7_compute_mmcr,
+ .get_constraint = power7_get_constraint,
+ .get_alternatives = power7_get_alternatives,
+ .disable_pmc = power7_disable_pmc,
+ .n_generic = ARRAY_SIZE(power7_generic_events),
+ .generic_events = power7_generic_events,
+ .cache_events = &power7_cache_events,
+};
--- /dev/null
+/*
+ * Performance counter support for PPC970-family processors.
+ *
+ * Copyright 2008-2009 Paul Mackerras, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/string.h>
+#include <linux/perf_counter.h>
+#include <asm/reg.h>
+
+/*
+ * Bits in event code for PPC970
+ */
+#define PM_PMC_SH 12 /* PMC number (1-based) for direct events */
+#define PM_PMC_MSK 0xf
+#define PM_UNIT_SH 8 /* TTMMUX number and setting - unit select */
+#define PM_UNIT_MSK 0xf
+#define PM_SPCSEL_SH 6
+#define PM_SPCSEL_MSK 3
+#define PM_BYTE_SH 4 /* Byte number of event bus to use */
+#define PM_BYTE_MSK 3
+#define PM_PMCSEL_MSK 0xf
+
+/* Values in PM_UNIT field */
+#define PM_NONE 0
+#define PM_FPU 1
+#define PM_VPU 2
+#define PM_ISU 3
+#define PM_IFU 4
+#define PM_IDU 5
+#define PM_STS 6
+#define PM_LSU0 7
+#define PM_LSU1U 8
+#define PM_LSU1L 9
+#define PM_LASTUNIT 9
+
+/*
+ * Bits in MMCR0 for PPC970
+ */
+#define MMCR0_PMC1SEL_SH 8
+#define MMCR0_PMC2SEL_SH 1
+#define MMCR_PMCSEL_MSK 0x1f
+
+/*
+ * Bits in MMCR1 for PPC970
+ */
+#define MMCR1_TTM0SEL_SH 62
+#define MMCR1_TTM1SEL_SH 59
+#define MMCR1_TTM3SEL_SH 53
+#define MMCR1_TTMSEL_MSK 3
+#define MMCR1_TD_CP_DBG0SEL_SH 50
+#define MMCR1_TD_CP_DBG1SEL_SH 48
+#define MMCR1_TD_CP_DBG2SEL_SH 46
+#define MMCR1_TD_CP_DBG3SEL_SH 44
+#define MMCR1_PMC1_ADDER_SEL_SH 39
+#define MMCR1_PMC2_ADDER_SEL_SH 38
+#define MMCR1_PMC6_ADDER_SEL_SH 37
+#define MMCR1_PMC5_ADDER_SEL_SH 36
+#define MMCR1_PMC8_ADDER_SEL_SH 35
+#define MMCR1_PMC7_ADDER_SEL_SH 34
+#define MMCR1_PMC3_ADDER_SEL_SH 33
+#define MMCR1_PMC4_ADDER_SEL_SH 32
+#define MMCR1_PMC3SEL_SH 27
+#define MMCR1_PMC4SEL_SH 22
+#define MMCR1_PMC5SEL_SH 17
+#define MMCR1_PMC6SEL_SH 12
+#define MMCR1_PMC7SEL_SH 7
+#define MMCR1_PMC8SEL_SH 2
+
+static short mmcr1_adder_bits[8] = {
+ MMCR1_PMC1_ADDER_SEL_SH,
+ MMCR1_PMC2_ADDER_SEL_SH,
+ MMCR1_PMC3_ADDER_SEL_SH,
+ MMCR1_PMC4_ADDER_SEL_SH,
+ MMCR1_PMC5_ADDER_SEL_SH,
+ MMCR1_PMC6_ADDER_SEL_SH,
+ MMCR1_PMC7_ADDER_SEL_SH,
+ MMCR1_PMC8_ADDER_SEL_SH
+};
+
+/*
+ * Bits in MMCRA
+ */
+
+/*
+ * Layout of constraint bits:
+ * 6666555555555544444444443333333333222222222211111111110000000000
+ * 3210987654321098765432109876543210987654321098765432109876543210
+ * <><><>[ >[ >[ >< >< >< >< ><><><><><><><><>
+ * SPT0T1 UC PS1 PS2 B0 B1 B2 B3 P1P2P3P4P5P6P7P8
+ *
+ * SP - SPCSEL constraint
+ * 48-49: SPCSEL value 0x3_0000_0000_0000
+ *
+ * T0 - TTM0 constraint
+ * 46-47: TTM0SEL value (0=FPU, 2=IFU, 3=VPU) 0xC000_0000_0000
+ *
+ * T1 - TTM1 constraint
+ * 44-45: TTM1SEL value (0=IDU, 3=STS) 0x3000_0000_0000
+ *
+ * UC - unit constraint: can't have all three of FPU|IFU|VPU, ISU, IDU|STS
+ * 43: UC3 error 0x0800_0000_0000
+ * 42: FPU|IFU|VPU events needed 0x0400_0000_0000
+ * 41: ISU events needed 0x0200_0000_0000
+ * 40: IDU|STS events needed 0x0100_0000_0000
+ *
+ * PS1
+ * 39: PS1 error 0x0080_0000_0000
+ * 36-38: count of events needing PMC1/2/5/6 0x0070_0000_0000
+ *
+ * PS2
+ * 35: PS2 error 0x0008_0000_0000
+ * 32-34: count of events needing PMC3/4/7/8 0x0007_0000_0000
+ *
+ * B0
+ * 28-31: Byte 0 event source 0xf000_0000
+ * Encoding as for the event code
+ *
+ * B1, B2, B3
+ * 24-27, 20-23, 16-19: Byte 1, 2, 3 event sources
+ *
+ * P1
+ * 15: P1 error 0x8000
+ * 14-15: Count of events needing PMC1
+ *
+ * P2..P8
+ * 0-13: Count of events needing PMC2..PMC8
+ */
+
+static unsigned char direct_marked_event[8] = {
+ (1<<2) | (1<<3), /* PMC1: PM_MRK_GRP_DISP, PM_MRK_ST_CMPL */
+ (1<<3) | (1<<5), /* PMC2: PM_THRESH_TIMEO, PM_MRK_BRU_FIN */
+ (1<<3) | (1<<5), /* PMC3: PM_MRK_ST_CMPL_INT, PM_MRK_VMX_FIN */
+ (1<<4) | (1<<5), /* PMC4: PM_MRK_GRP_CMPL, PM_MRK_CRU_FIN */
+ (1<<4) | (1<<5), /* PMC5: PM_GRP_MRK, PM_MRK_GRP_TIMEO */
+ (1<<3) | (1<<4) | (1<<5),
+ /* PMC6: PM_MRK_ST_STS, PM_MRK_FXU_FIN, PM_MRK_GRP_ISSUED */
+ (1<<4) | (1<<5), /* PMC7: PM_MRK_FPU_FIN, PM_MRK_INST_FIN */
+ (1<<4) /* PMC8: PM_MRK_LSU_FIN */
+};
+
+/*
+ * Returns 1 if event counts things relating to marked instructions
+ * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
+ */
+static int p970_marked_instr_event(u64 event)
+{
+ int pmc, psel, unit, byte, bit;
+ unsigned int mask;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ psel = event & PM_PMCSEL_MSK;
+ if (pmc) {
+ if (direct_marked_event[pmc - 1] & (1 << psel))
+ return 1;
+ if (psel == 0) /* add events */
+ bit = (pmc <= 4)? pmc - 1: 8 - pmc;
+ else if (psel == 7 || psel == 13) /* decode events */
+ bit = 4;
+ else
+ return 0;
+ } else
+ bit = psel;
+
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ mask = 0;
+ switch (unit) {
+ case PM_VPU:
+ mask = 0x4c; /* byte 0 bits 2,3,6 */
+ case PM_LSU0:
+ /* byte 2 bits 0,2,3,4,6; all of byte 1 */
+ mask = 0x085dff00;
+ case PM_LSU1L:
+ mask = 0x50 << 24; /* byte 3 bits 4,6 */
+ break;
+ }
+ return (mask >> (byte * 8 + bit)) & 1;
+}
+
+/* Masks and values for using events from the various units */
+static u64 unit_cons[PM_LASTUNIT+1][2] = {
+ [PM_FPU] = { 0xc80000000000ull, 0x040000000000ull },
+ [PM_VPU] = { 0xc80000000000ull, 0xc40000000000ull },
+ [PM_ISU] = { 0x080000000000ull, 0x020000000000ull },
+ [PM_IFU] = { 0xc80000000000ull, 0x840000000000ull },
+ [PM_IDU] = { 0x380000000000ull, 0x010000000000ull },
+ [PM_STS] = { 0x380000000000ull, 0x310000000000ull },
+};
+
+static int p970_get_constraint(u64 event, u64 *maskp, u64 *valp)
+{
+ int pmc, byte, unit, sh, spcsel;
+ u64 mask = 0, value = 0;
+ int grp = -1;
+
+ pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc > 8)
+ return -1;
+ sh = (pmc - 1) * 2;
+ mask |= 2 << sh;
+ value |= 1 << sh;
+ grp = ((pmc - 1) >> 1) & 1;
+ }
+ unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
+ if (unit) {
+ if (unit > PM_LASTUNIT)
+ return -1;
+ mask |= unit_cons[unit][0];
+ value |= unit_cons[unit][1];
+ byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
+ /*
+ * Bus events on bytes 0 and 2 can be counted
+ * on PMC1/2/5/6; bytes 1 and 3 on PMC3/4/7/8.
+ */
+ if (!pmc)
+ grp = byte & 1;
+ /* Set byte lane select field */
+ mask |= 0xfULL << (28 - 4 * byte);
+ value |= (u64)unit << (28 - 4 * byte);
+ }
+ if (grp == 0) {
+ /* increment PMC1/2/5/6 field */
+ mask |= 0x8000000000ull;
+ value |= 0x1000000000ull;
+ } else if (grp == 1) {
+ /* increment PMC3/4/7/8 field */
+ mask |= 0x800000000ull;
+ value |= 0x100000000ull;
+ }
+ spcsel = (event >> PM_SPCSEL_SH) & PM_SPCSEL_MSK;
+ if (spcsel) {
+ mask |= 3ull << 48;
+ value |= (u64)spcsel << 48;
+ }
+ *maskp = mask;
+ *valp = value;
+ return 0;
+}
+
+static int p970_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ alt[0] = event;
+
+ /* 2 alternatives for LSU empty */
+ if (event == 0x2002 || event == 0x3002) {
+ alt[1] = event ^ 0x1000;
+ return 2;
+ }
+
+ return 1;
+}
+
+static int p970_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], u64 mmcr[])
+{
+ u64 mmcr0 = 0, mmcr1 = 0, mmcra = 0;
+ unsigned int pmc, unit, byte, psel;
+ unsigned int ttm, grp;
+ unsigned int pmc_inuse = 0;
+ unsigned int pmc_grp_use[2];
+ unsigned char busbyte[4];
+ unsigned char unituse[16];
+ unsigned char unitmap[] = { 0, 0<<3, 3<<3, 1<<3, 2<<3, 0|4, 3|4 };
+ unsigned char ttmuse[2];
+ unsigned char pmcsel[8];
+ int i;
+ int spcsel;
+
+ if (n_ev > 8)
+ return -1;
+
+ /* First pass to count resource use */
+ pmc_grp_use[0] = pmc_grp_use[1] = 0;
+ memset(busbyte, 0, sizeof(busbyte));
+ memset(unituse, 0, sizeof(unituse));
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ if (pmc) {
+ if (pmc_inuse & (1 << (pmc - 1)))
+ return -1;
+ pmc_inuse |= 1 << (pmc - 1);
+ /* count 1/2/5/6 vs 3/4/7/8 use */
+ ++pmc_grp_use[((pmc - 1) >> 1) & 1];
+ }
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ if (unit) {
+ if (unit > PM_LASTUNIT)
+ return -1;
+ if (!pmc)
+ ++pmc_grp_use[byte & 1];
+ if (busbyte[byte] && busbyte[byte] != unit)
+ return -1;
+ busbyte[byte] = unit;
+ unituse[unit] = 1;
+ }
+ }
+ if (pmc_grp_use[0] > 4 || pmc_grp_use[1] > 4)
+ return -1;
+
+ /*
+ * Assign resources and set multiplexer selects.
+ *
+ * PM_ISU can go either on TTM0 or TTM1, but that's the only
+ * choice we have to deal with.
+ */
+ if (unituse[PM_ISU] &
+ (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_VPU]))
+ unitmap[PM_ISU] = 2 | 4; /* move ISU to TTM1 */
+ /* Set TTM[01]SEL fields. */
+ ttmuse[0] = ttmuse[1] = 0;
+ for (i = PM_FPU; i <= PM_STS; ++i) {
+ if (!unituse[i])
+ continue;
+ ttm = unitmap[i];
+ ++ttmuse[(ttm >> 2) & 1];
+ mmcr1 |= (u64)(ttm & ~4) << MMCR1_TTM1SEL_SH;
+ }
+ /* Check only one unit per TTMx */
+ if (ttmuse[0] > 1 || ttmuse[1] > 1)
+ return -1;
+
+ /* Set byte lane select fields and TTM3SEL. */
+ for (byte = 0; byte < 4; ++byte) {
+ unit = busbyte[byte];
+ if (!unit)
+ continue;
+ if (unit <= PM_STS)
+ ttm = (unitmap[unit] >> 2) & 1;
+ else if (unit == PM_LSU0)
+ ttm = 2;
+ else {
+ ttm = 3;
+ if (unit == PM_LSU1L && byte >= 2)
+ mmcr1 |= 1ull << (MMCR1_TTM3SEL_SH + 3 - byte);
+ }
+ mmcr1 |= (u64)ttm << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
+ }
+
+ /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
+ memset(pmcsel, 0x8, sizeof(pmcsel)); /* 8 means don't count */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
+ unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
+ byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
+ psel = event[i] & PM_PMCSEL_MSK;
+ if (!pmc) {
+ /* Bus event or any-PMC direct event */
+ if (unit)
+ psel |= 0x10 | ((byte & 2) << 2);
+ else
+ psel |= 8;
+ for (pmc = 0; pmc < 8; ++pmc) {
+ if (pmc_inuse & (1 << pmc))
+ continue;
+ grp = (pmc >> 1) & 1;
+ if (unit) {
+ if (grp == (byte & 1))
+ break;
+ } else if (pmc_grp_use[grp] < 4) {
+ ++pmc_grp_use[grp];
+ break;
+ }
+ }
+ pmc_inuse |= 1 << pmc;
+ } else {
+ /* Direct event */
+ --pmc;
+ if (psel == 0 && (byte & 2))
+ /* add events on higher-numbered bus */
+ mmcr1 |= 1ull << mmcr1_adder_bits[pmc];
+ }
+ pmcsel[pmc] = psel;
+ hwc[i] = pmc;
+ spcsel = (event[i] >> PM_SPCSEL_SH) & PM_SPCSEL_MSK;
+ mmcr1 |= spcsel;
+ if (p970_marked_instr_event(event[i]))
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+ }
+ for (pmc = 0; pmc < 2; ++pmc)
+ mmcr0 |= pmcsel[pmc] << (MMCR0_PMC1SEL_SH - 7 * pmc);
+ for (; pmc < 8; ++pmc)
+ mmcr1 |= (u64)pmcsel[pmc] << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2));
+ if (pmc_inuse & 1)
+ mmcr0 |= MMCR0_PMC1CE;
+ if (pmc_inuse & 0xfe)
+ mmcr0 |= MMCR0_PMCjCE;
+
+ mmcra |= 0x2000; /* mark only one IOP per PPC instruction */
+
+ /* Return MMCRx values */
+ mmcr[0] = mmcr0;
+ mmcr[1] = mmcr1;
+ mmcr[2] = mmcra;
+ return 0;
+}
+
+static void p970_disable_pmc(unsigned int pmc, u64 mmcr[])
+{
+ int shift, i;
+
+ if (pmc <= 1) {
+ shift = MMCR0_PMC1SEL_SH - 7 * pmc;
+ i = 0;
+ } else {
+ shift = MMCR1_PMC3SEL_SH - 5 * (pmc - 2);
+ i = 1;
+ }
+ /*
+ * Setting the PMCxSEL field to 0x08 disables PMC x.
+ */
+ mmcr[i] = (mmcr[i] & ~(0x1fUL << shift)) | (0x08UL << shift);
+}
+
+static int ppc970_generic_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = 7,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 1,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x8810, /* PM_LD_REF_L1 */
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x3810, /* PM_LD_MISS_L1 */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x431, /* PM_BR_ISSUED */
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x327, /* PM_GRP_BR_MPRED */
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int ppc970_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x8810, 0x3810 },
+ [C(OP_WRITE)] = { 0x7810, 0x813 },
+ [C(OP_PREFETCH)] = { 0x731, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0x733, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x704 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x700 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x431, 0x327 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
+struct power_pmu ppc970_pmu = {
+ .n_counter = 8,
+ .max_alternatives = 2,
+ .add_fields = 0x001100005555ull,
+ .test_adder = 0x013300000000ull,
+ .compute_mmcr = p970_compute_mmcr,
+ .get_constraint = p970_get_constraint,
+ .get_alternatives = p970_get_alternatives,
+ .disable_pmc = p970_disable_pmc,
+ .n_generic = ARRAY_SIZE(ppc970_generic_events),
+ .generic_events = ppc970_generic_events,
+ .cache_events = &ppc970_cache_events,
+};
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/kdebug.h>
+#include <linux/perf_counter.h>
#include <asm/firmware.h>
#include <asm/page.h>
die("Weird page fault", regs, SIGSEGV);
}
+ perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, address);
+
/* When running in the kernel we expect faults to occur only to
* addresses in user space. All other faults represent errors in the
* kernel and should generate an OOPS. Unfortunately, in the case of an
}
if (ret & VM_FAULT_MAJOR) {
current->maj_flt++;
+ perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0,
+ regs, address);
#ifdef CONFIG_PPC_SMLPAR
if (firmware_has_feature(FW_FEATURE_CMO)) {
preempt_disable();
preempt_enable();
}
#endif
- } else
+ } else {
current->min_flt++;
+ perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0,
+ regs, address);
+ }
up_read(&mm->mmap_sem);
return 0;
config PPC64
bool "64-bit kernel"
default n
+ select HAVE_PERF_COUNTERS
help
This option selects whether a 32-bit or a 64-bit kernel
will be built.
lpar_xirr_info_set((0xff << 24) | irq);
}
-static void xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
+static int xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
{
unsigned int irq;
int status;
irq = (unsigned int)irq_map[virq].hwirq;
if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS)
- return;
+ return -1;
status = rtas_call(ibm_get_xive, 1, 3, xics_status, irq);
if (status) {
printk(KERN_ERR "%s: ibm,get-xive irq=%u returns %d\n",
__func__, irq, status);
- return;
+ return -1;
}
/*
printk(KERN_WARNING
"%s: No online cpus in the mask %s for irq %d\n",
__func__, cpulist, virq);
- return;
+ return -1;
}
status = rtas_call(ibm_set_xive, 3, 1, NULL,
if (status) {
printk(KERN_ERR "%s: ibm,set-xive irq=%u returns %d\n",
__func__, irq, status);
- return;
+ return -1;
}
+
+ return 0;
}
static struct irq_chip xics_pic_direct = {
#endif /* CONFIG_SMP */
-void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
+int mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
{
struct mpic *mpic = mpic_from_irq(irq);
unsigned int src = mpic_irq_to_hw(irq);
mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
mpic_physmask(cpus_addr(tmp)[0]));
}
+
+ return 0;
}
static unsigned int mpic_type_to_vecpri(struct mpic *mpic, unsigned int type)
extern int mpic_set_irq_type(unsigned int virq, unsigned int flow_type);
extern void mpic_set_vector(unsigned int virq, unsigned int vector);
-extern void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask);
+extern int mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask);
#endif /* _POWERPC_SYSDEV_MPIC_H */
#define TI_KERN_CNTD1 0x00000488
#define TI_PCR 0x00000490
#define TI_RESTART_BLOCK 0x00000498
-#define TI_KUNA_REGS 0x000004c0
-#define TI_KUNA_INSN 0x000004c8
+#define TI_KUNA_REGS 0x000004c8
+#define TI_KUNA_INSN 0x000004d0
#define TI_FPREGS 0x00000500
/* We embed this in the uppermost byte of thread_info->flags */
}
}
-static void sun4u_set_affinity(unsigned int virt_irq,
+static int sun4u_set_affinity(unsigned int virt_irq,
const struct cpumask *mask)
{
sun4u_irq_enable(virt_irq);
+
+ return 0;
}
/* Don't do anything. The desc->status check for IRQ_DISABLED in
ino, err);
}
-static void sun4v_set_affinity(unsigned int virt_irq,
+static int sun4v_set_affinity(unsigned int virt_irq,
const struct cpumask *mask)
{
unsigned int ino = virt_irq_table[virt_irq].dev_ino;
if (err != HV_EOK)
printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
"err(%d)\n", ino, cpuid, err);
+
+ return 0;
}
static void sun4v_irq_disable(unsigned int virt_irq)
dev_handle, dev_ino, err);
}
-static void sun4v_virt_set_affinity(unsigned int virt_irq,
+static int sun4v_virt_set_affinity(unsigned int virt_irq,
const struct cpumask *mask)
{
unsigned long cpuid, dev_handle, dev_ino;
printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): "
"err(%d)\n",
dev_handle, dev_ino, cpuid, err);
+
+ return 0;
}
static void sun4v_virq_disable(unsigned int virt_irq)
--- /dev/null
+
+obj-$(CONFIG_KVM) += kvm/
+
+# Xen paravirtualization support
+obj-$(CONFIG_XEN) += xen/
+
+# lguest paravirtualization support
+obj-$(CONFIG_LGUEST_GUEST) += lguest/
+
+obj-y += kernel/
+obj-y += mm/
+
+obj-y += crypto/
+obj-y += vdso/
+obj-$(CONFIG_IA32_EMULATION) += ia32/
+
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_LZMA
+config OUTPUT_FORMAT
+ string
+ default "elf32-i386" if X86_32
+ default "elf64-x86-64" if X86_64
+
config ARCH_DEFCONFIG
string
default "arch/x86/configs/i386_defconfig" if X86_32
If you don't know what to do here, say N.
-config NUMA_MIGRATE_IRQ_DESC
- bool "Move irq desc when changing irq smp_affinity"
+config NUMA_IRQ_DESC
+ def_bool y
depends on SPARSE_IRQ && NUMA
- depends on BROKEN
- default n
- ---help---
- This enables moving irq_desc to cpu/node that irq will use handled.
-
- If you don't know what to do here, say N.
config X86_MPPARSE
bool "Enable MPS table" if ACPI
depends on X86_64
depends on X86_EXTENDED_PLATFORM
depends on NUMA
- select X86_X2APIC
+ depends on X86_X2APIC
---help---
This option is needed in order to support SGI Ultraviolet systems.
If you don't have one of these, you should say N here.
config X86_LOCAL_APIC
def_bool y
depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
+ select HAVE_PERF_COUNTERS if (!M386 && !M486)
config X86_IO_APIC
def_bool y
config PHYSICAL_START
hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
- default "0x1000000" if X86_NUMAQ
- default "0x200000" if X86_64
- default "0x100000"
+ default "0x1000000"
---help---
This gives the physical address where the kernel is loaded.
to be specifically compiled to run from a specific memory area
(normally a reserved region) and this option comes handy.
- So if you are using bzImage for capturing the crash dump, leave
- the value here unchanged to 0x100000 and set CONFIG_RELOCATABLE=y.
- Otherwise if you plan to use vmlinux for capturing the crash dump
- change this value to start of the reserved region (Typically 16MB
- 0x1000000). In other words, it can be set based on the "X" value as
- specified in the "crashkernel=YM@XM" command line boot parameter
- passed to the panic-ed kernel. Typically this parameter is set as
- crashkernel=64M@16M. Please take a look at
- Documentation/kdump/kdump.txt for more details about crash dumps.
+ So if you are using bzImage for capturing the crash dump,
+ leave the value here unchanged to 0x1000000 and set
+ CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
+ for capturing the crash dump change this value to start of
+ the reserved region. In other words, it can be set based on
+ the "X" value as specified in the "crashkernel=YM@XM"
+ command line boot parameter passed to the panic-ed
+ kernel. Please take a look at Documentation/kdump/kdump.txt
+ for more details about crash dumps.
Usage of bzImage for capturing the crash dump is recommended as
one does not have to build two kernels. Same kernel can be used
Don't change this unless you know what you are doing.
config RELOCATABLE
- bool "Build a relocatable kernel (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ bool "Build a relocatable kernel"
+ default y
---help---
This builds a kernel image that retains relocation information
so it can be loaded someplace besides the default 1MB.
it has been loaded at and the compile time physical address
(CONFIG_PHYSICAL_START) is ignored.
+# Relocation on x86-32 needs some additional build support
+config X86_NEED_RELOCS
+ def_bool y
+ depends on X86_32 && RELOCATABLE
+
config PHYSICAL_ALIGN
hex
prompt "Alignment value to which kernel should be aligned" if X86_32
- default "0x100000" if X86_32
- default "0x200000" if X86_64
- range 0x2000 0x400000
+ default "0x1000000"
+ range 0x2000 0x1000000
---help---
This value puts the alignment restrictions on physical address
where kernel is loaded and run from. Kernel is compiled for an
options. See Documentation/x86_64/boot-options.txt for more
details.
+config IOMMU_STRESS
+ bool "Enable IOMMU stress-test mode"
+ ---help---
+ This option disables various optimizations in IOMMU related
+ code to do real stress testing of the IOMMU code. This option
+ will cause a performance drop and should only be enabled for
+ testing.
+
config IOMMU_LEAK
bool "IOMMU leak tracing"
- depends on DEBUG_KERNEL
- depends on IOMMU_DEBUG
+ depends on IOMMU_DEBUG && DMA_API_DEBUG
---help---
Add a simple leak tracer to the IOMMU code. This is useful when you
are debugging a buggy device driver that leaks IOMMU mappings.
+config X86_DS_SELFTEST
+ bool "DS selftest"
+ default y
+ depends on DEBUG_KERNEL
+ depends on X86_DS
+ ---help---
+ Perform Debug Store selftests at boot time.
+ If in doubt, say "N".
+
config HAVE_MMIOTRACE_SUPPORT
def_bool y
KBUILD_DEFCONFIG := $(ARCH)_defconfig
endif
-core-$(CONFIG_KVM) += arch/x86/kvm/
-
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
libs-y += arch/x86/lib/
-# Sub architecture files that needs linking first
-core-y += $(fcore-y)
-
-# Xen paravirtualization support
-core-$(CONFIG_XEN) += arch/x86/xen/
-
-# lguest paravirtualization support
-core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
-
-core-y += arch/x86/kernel/
-core-y += arch/x86/mm/
-
-core-y += arch/x86/crypto/
-core-y += arch/x86/vdso/
-core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
+# See arch/x86/Kbuild for content of core part of the kernel
+core-y += arch/x86/
# drivers-y are linked after core-y
drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
cpustr.h
mkcpustr
offsets.h
+voffset.h
+zoffset.h
setup
setup.bin
setup.elf
targets += fdimage fdimage144 fdimage288 image.iso mtools.conf
subdir- := compressed
-setup-y += a20.o cmdline.o copy.o cpu.o cpucheck.o edd.o
+setup-y += a20.o bioscall.o cmdline.o copy.o cpu.o cpucheck.o edd.o
setup-y += header.o main.o mca.o memory.o pm.o pmjump.o
-setup-y += printf.o string.o tty.o video.o video-mode.o version.o
+setup-y += printf.o regs.o string.o tty.o video.o video-mode.o
+setup-y += version.o
setup-$(CONFIG_X86_APM_BOOT) += apm.o
# The link order of the video-*.o modules can matter. In particular,
SETUP_OBJS = $(addprefix $(obj)/,$(setup-y))
-sed-offsets := -e 's/^00*/0/' \
- -e 's/^\([0-9a-fA-F]*\) . \(input_data\|input_data_end\)$$/\#define \2 0x\1/p'
+sed-voffset := -e 's/^\([0-9a-fA-F]*\) . \(_text\|_end\)$$/\#define VO_\2 0x\1/p'
-quiet_cmd_offsets = OFFSETS $@
- cmd_offsets = $(NM) $< | sed -n $(sed-offsets) > $@
+quiet_cmd_voffset = VOFFSET $@
+ cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@
-$(obj)/offsets.h: $(obj)/compressed/vmlinux FORCE
- $(call if_changed,offsets)
+targets += voffset.h
+$(obj)/voffset.h: vmlinux FORCE
+ $(call if_changed,voffset)
+
+sed-zoffset := -e 's/^\([0-9a-fA-F]*\) . \(startup_32\|input_data\|_end\|z_.*\)$$/\#define ZO_\2 0x\1/p'
+
+quiet_cmd_zoffset = ZOFFSET $@
+ cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@
+
+targets += zoffset.h
+$(obj)/zoffset.h: $(obj)/compressed/vmlinux FORCE
+ $(call if_changed,zoffset)
-targets += offsets.h
AFLAGS_header.o += -I$(obj)
-$(obj)/header.o: $(obj)/offsets.h
+$(obj)/header.o: $(obj)/voffset.h $(obj)/zoffset.h
LDFLAGS_setup.elf := -T
$(obj)/setup.elf: $(src)/setup.ld $(SETUP_OBJS) FORCE
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007-2008 rPath, Inc. - All Rights Reserved
- * Copyright 2009 Intel Corporation
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
static void enable_a20_bios(void)
{
- asm volatile("pushfl; int $0x15; popfl"
- : : "a" ((u16)0x2401));
+ struct biosregs ireg;
+
+ initregs(&ireg);
+ ireg.ax = 0x2401;
+ intcall(0x15, &ireg, NULL);
}
static void enable_a20_kbc(void)
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* Original APM BIOS checking by Stephen Rothwell, May 1994
* (sfr@canb.auug.org.au)
int query_apm_bios(void)
{
- u16 ax, bx, cx, dx, di;
- u32 ebx, esi;
- u8 err;
+ struct biosregs ireg, oreg;
/* APM BIOS installation check */
- ax = 0x5300;
- bx = cx = 0;
- asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp ; setc %0"
- : "=d" (err), "+a" (ax), "+b" (bx), "+c" (cx)
- : : "esi", "edi");
+ initregs(&ireg);
+ ireg.ah = 0x53;
+ intcall(0x15, &ireg, &oreg);
- if (err)
+ if (oreg.flags & X86_EFLAGS_CF)
return -1; /* No APM BIOS */
- if (bx != 0x504d) /* "PM" signature */
+ if (oreg.bx != 0x504d) /* "PM" signature */
return -1;
- if (!(cx & 0x02)) /* 32 bits supported? */
+ if (!(oreg.cx & 0x02)) /* 32 bits supported? */
return -1;
/* Disconnect first, just in case */
- ax = 0x5304;
- bx = 0;
- asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp"
- : "+a" (ax), "+b" (bx)
- : : "ecx", "edx", "esi", "edi");
-
- /* Paranoia */
- ebx = esi = 0;
- cx = dx = di = 0;
+ ireg.al = 0x04;
+ intcall(0x15, &ireg, NULL);
/* 32-bit connect */
- asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp ; setc %6"
- : "=a" (ax), "+b" (ebx), "+c" (cx), "+d" (dx),
- "+S" (esi), "+D" (di), "=m" (err)
- : "a" (0x5303));
-
- boot_params.apm_bios_info.cseg = ax;
- boot_params.apm_bios_info.offset = ebx;
- boot_params.apm_bios_info.cseg_16 = cx;
- boot_params.apm_bios_info.dseg = dx;
- boot_params.apm_bios_info.cseg_len = (u16)esi;
- boot_params.apm_bios_info.cseg_16_len = esi >> 16;
- boot_params.apm_bios_info.dseg_len = di;
-
- if (err)
+ ireg.al = 0x03;
+ intcall(0x15, &ireg, &oreg);
+
+ boot_params.apm_bios_info.cseg = oreg.ax;
+ boot_params.apm_bios_info.offset = oreg.ebx;
+ boot_params.apm_bios_info.cseg_16 = oreg.cx;
+ boot_params.apm_bios_info.dseg = oreg.dx;
+ boot_params.apm_bios_info.cseg_len = oreg.si;
+ boot_params.apm_bios_info.cseg_16_len = oreg.hsi;
+ boot_params.apm_bios_info.dseg_len = oreg.di;
+
+ if (oreg.flags & X86_EFLAGS_CF)
return -1;
/* Redo the installation check as the 32-bit connect;
some BIOSes return different flags this way... */
- ax = 0x5300;
- bx = cx = 0;
- asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp ; setc %0"
- : "=d" (err), "+a" (ax), "+b" (bx), "+c" (cx)
- : : "esi", "edi");
+ ireg.al = 0x00;
+ intcall(0x15, &ireg, &oreg);
- if (err || bx != 0x504d) {
+ if ((oreg.eflags & X86_EFLAGS_CF) || oreg.bx != 0x504d) {
/* Failure with 32-bit connect, try to disconect and ignore */
- ax = 0x5304;
- bx = 0;
- asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp"
- : "+a" (ax), "+b" (bx)
- : : "ecx", "edx", "esi", "edi");
+ ireg.al = 0x04;
+ intcall(0x15, &ireg, NULL);
return -1;
}
- boot_params.apm_bios_info.version = ax;
- boot_params.apm_bios_info.flags = cx;
+ boot_params.apm_bios_info.version = oreg.ax;
+ boot_params.apm_bios_info.flags = oreg.cx;
return 0;
}
--- /dev/null
+/* -----------------------------------------------------------------------
+ *
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
+ *
+ * This file is part of the Linux kernel, and is made available under
+ * the terms of the GNU General Public License version 2 or (at your
+ * option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * "Glove box" for BIOS calls. Avoids the constant problems with BIOSes
+ * touching registers they shouldn't be.
+ */
+
+ .code16
+ .text
+ .globl intcall
+ .type intcall, @function
+intcall:
+ /* Self-modify the INT instruction. Ugly, but works. */
+ cmpb %al, 3f
+ je 1f
+ movb %al, 3f
+ jmp 1f /* Synchronize pipeline */
+1:
+ /* Save state */
+ pushfl
+ pushw %fs
+ pushw %gs
+ pushal
+
+ /* Copy input state to stack frame */
+ subw $44, %sp
+ movw %dx, %si
+ movw %sp, %di
+ movw $11, %cx
+ rep; movsd
+
+ /* Pop full state from the stack */
+ popal
+ popw %gs
+ popw %fs
+ popw %es
+ popw %ds
+ popfl
+
+ /* Actual INT */
+ .byte 0xcd /* INT opcode */
+3: .byte 0
+
+ /* Push full state to the stack */
+ pushfl
+ pushw %ds
+ pushw %es
+ pushw %fs
+ pushw %gs
+ pushal
+
+ /* Re-establish C environment invariants */
+ cld
+ movzwl %sp, %esp
+ movw %cs, %ax
+ movw %ax, %ds
+ movw %ax, %es
+
+ /* Copy output state from stack frame */
+ movw 68(%esp), %di /* Original %cx == 3rd argument */
+ andw %di, %di
+ jz 4f
+ movw %sp, %si
+ movw $11, %cx
+ rep; movsd
+4: addw $44, %sp
+
+ /* Restore state and return */
+ popal
+ popw %gs
+ popw %fs
+ popfl
+ retl
+ .size intcall, .-intcall
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
#include <asm/setup.h>
#include "bitops.h"
#include <asm/cpufeature.h>
+#include <asm/processor-flags.h>
/* Useful macros */
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
/* apm.c */
int query_apm_bios(void);
+/* bioscall.c */
+struct biosregs {
+ union {
+ struct {
+ u32 edi;
+ u32 esi;
+ u32 ebp;
+ u32 _esp;
+ u32 ebx;
+ u32 edx;
+ u32 ecx;
+ u32 eax;
+ u32 _fsgs;
+ u32 _dses;
+ u32 eflags;
+ };
+ struct {
+ u16 di, hdi;
+ u16 si, hsi;
+ u16 bp, hbp;
+ u16 _sp, _hsp;
+ u16 bx, hbx;
+ u16 dx, hdx;
+ u16 cx, hcx;
+ u16 ax, hax;
+ u16 gs, fs;
+ u16 es, ds;
+ u16 flags, hflags;
+ };
+ struct {
+ u8 dil, dih, edi2, edi3;
+ u8 sil, sih, esi2, esi3;
+ u8 bpl, bph, ebp2, ebp3;
+ u8 _spl, _sph, _esp2, _esp3;
+ u8 bl, bh, ebx2, ebx3;
+ u8 dl, dh, edx2, edx3;
+ u8 cl, ch, ecx2, ecx3;
+ u8 al, ah, eax2, eax3;
+ };
+ };
+};
+void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg);
+
/* cmdline.c */
int cmdline_find_option(const char *option, char *buffer, int bufsize);
int cmdline_find_option_bool(const char *option);
int vsprintf(char *buf, const char *fmt, va_list args);
int printf(const char *fmt, ...);
+/* regs.c */
+void initregs(struct biosregs *regs);
+
/* string.c */
int strcmp(const char *str1, const char *str2);
size_t strnlen(const char *s, size_t maxlen);
relocs
vmlinux.bin.all
vmlinux.relocs
+vmlinux.lds
+mkpiggy
+piggy.S
LDFLAGS := -m elf_$(UTS_MACHINE)
LDFLAGS_vmlinux := -T
-$(obj)/vmlinux: $(src)/vmlinux_$(BITS).lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
+hostprogs-y := mkpiggy
+
+$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
$(call if_changed,ld)
@:
targets += vmlinux.bin.all vmlinux.relocs relocs
-hostprogs-$(CONFIG_X86_32) += relocs
+hostprogs-$(CONFIG_X86_NEED_RELOCS) += relocs
quiet_cmd_relocs = RELOCS $@
cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
$(call if_changed,relocs)
vmlinux.bin.all-y := $(obj)/vmlinux.bin
-vmlinux.bin.all-$(CONFIG_RELOCATABLE) += $(obj)/vmlinux.relocs
-quiet_cmd_relocbin = BUILD $@
- cmd_relocbin = cat $(filter-out FORCE,$^) > $@
-$(obj)/vmlinux.bin.all: $(vmlinux.bin.all-y) FORCE
- $(call if_changed,relocbin)
-
-ifeq ($(CONFIG_X86_32),y)
+vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
-ifdef CONFIG_RELOCATABLE
-$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
- $(call if_changed,gzip)
-$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin.all FORCE
- $(call if_changed,bzip2)
-$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin.all FORCE
- $(call if_changed,lzma)
-else
-$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
$(call if_changed,gzip)
-$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
+$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
$(call if_changed,bzip2)
-$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
+$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
$(call if_changed,lzma)
-endif
-LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
-else
+suffix-$(CONFIG_KERNEL_GZIP) := gz
+suffix-$(CONFIG_KERNEL_BZIP2) := bz2
+suffix-$(CONFIG_KERNEL_LZMA) := lzma
-$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
- $(call if_changed,gzip)
-$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
- $(call if_changed,bzip2)
-$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
- $(call if_changed,lzma)
-
-LDFLAGS_piggy.o := -r --format binary --oformat elf64-x86-64 -T
-endif
+quiet_cmd_mkpiggy = MKPIGGY $@
+ cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )
-suffix_$(CONFIG_KERNEL_GZIP) = gz
-suffix_$(CONFIG_KERNEL_BZIP2) = bz2
-suffix_$(CONFIG_KERNEL_LZMA) = lzma
-
-$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE
- $(call if_changed,ld)
+targets += piggy.S
+$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE
+ $(call if_changed,mkpiggy)
* the page directory. [According to comments etc elsewhere on a compressed
* kernel it will end up at 0x1000 + 1Mb I hope so as I assume this. - AC]
*
- * Page 0 is deliberately kept safe, since System Management Mode code in
+ * Page 0 is deliberately kept safe, since System Management Mode code in
* laptops may need to access the BIOS data stored there. This is also
- * useful for future device drivers that either access the BIOS via VM86
+ * useful for future device drivers that either access the BIOS via VM86
* mode.
*/
/*
* High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
*/
-.text
+ .text
#include <linux/linkage.h>
#include <asm/segment.h>
#include <asm/boot.h>
#include <asm/asm-offsets.h>
-.section ".text.head","ax",@progbits
+ .section ".text.head","ax",@progbits
ENTRY(startup_32)
cld
- /* test KEEP_SEGMENTS flag to see if the bootloader is asking
- * us to not reload segments */
- testb $(1<<6), BP_loadflags(%esi)
- jnz 1f
+ /*
+ * Test KEEP_SEGMENTS flag to see if the bootloader is asking
+ * us to not reload segments
+ */
+ testb $(1<<6), BP_loadflags(%esi)
+ jnz 1f
cli
- movl $(__BOOT_DS),%eax
- movl %eax,%ds
- movl %eax,%es
- movl %eax,%fs
- movl %eax,%gs
- movl %eax,%ss
+ movl $__BOOT_DS, %eax
+ movl %eax, %ds
+ movl %eax, %es
+ movl %eax, %fs
+ movl %eax, %gs
+ movl %eax, %ss
1:
-/* Calculate the delta between where we were compiled to run
+/*
+ * Calculate the delta between where we were compiled to run
* at and where we were actually loaded at. This can only be done
* with a short local call on x86. Nothing else will tell us what
* address we are running at. The reserved chunk of the real-mode
* data at 0x1e4 (defined as a scratch field) are used as the stack
* for this calculation. Only 4 bytes are needed.
*/
- leal (0x1e4+4)(%esi), %esp
- call 1f
-1: popl %ebp
- subl $1b, %ebp
+ leal (BP_scratch+4)(%esi), %esp
+ call 1f
+1: popl %ebp
+ subl $1b, %ebp
-/* %ebp contains the address we are loaded at by the boot loader and %ebx
+/*
+ * %ebp contains the address we are loaded at by the boot loader and %ebx
* contains the address where we should move the kernel image temporarily
* for safe in-place decompression.
*/
#ifdef CONFIG_RELOCATABLE
- movl %ebp, %ebx
- addl $(CONFIG_PHYSICAL_ALIGN - 1), %ebx
- andl $(~(CONFIG_PHYSICAL_ALIGN - 1)), %ebx
+ movl %ebp, %ebx
+ movl BP_kernel_alignment(%esi), %eax
+ decl %eax
+ addl %eax, %ebx
+ notl %eax
+ andl %eax, %ebx
#else
- movl $LOAD_PHYSICAL_ADDR, %ebx
+ movl $LOAD_PHYSICAL_ADDR, %ebx
#endif
- /* Replace the compressed data size with the uncompressed size */
- subl input_len(%ebp), %ebx
- movl output_len(%ebp), %eax
- addl %eax, %ebx
- /* Add 8 bytes for every 32K input block */
- shrl $12, %eax
- addl %eax, %ebx
- /* Add 32K + 18 bytes of extra slack */
- addl $(32768 + 18), %ebx
- /* Align on a 4K boundary */
- addl $4095, %ebx
- andl $~4095, %ebx
-
-/* Copy the compressed kernel to the end of our buffer
+ /* Target address to relocate to for decompression */
+ addl $z_extract_offset, %ebx
+
+ /* Set up the stack */
+ leal boot_stack_end(%ebx), %esp
+
+ /* Zero EFLAGS */
+ pushl $0
+ popfl
+
+/*
+ * Copy the compressed kernel to the end of our buffer
* where decompression in place becomes safe.
*/
- pushl %esi
- leal _end(%ebp), %esi
- leal _end(%ebx), %edi
- movl $(_end - startup_32), %ecx
+ pushl %esi
+ leal (_bss-4)(%ebp), %esi
+ leal (_bss-4)(%ebx), %edi
+ movl $(_bss - startup_32), %ecx
+ shrl $2, %ecx
std
- rep
- movsb
+ rep movsl
cld
- popl %esi
-
-/* Compute the kernel start address.
- */
-#ifdef CONFIG_RELOCATABLE
- addl $(CONFIG_PHYSICAL_ALIGN - 1), %ebp
- andl $(~(CONFIG_PHYSICAL_ALIGN - 1)), %ebp
-#else
- movl $LOAD_PHYSICAL_ADDR, %ebp
-#endif
+ popl %esi
/*
* Jump to the relocated address.
*/
- leal relocated(%ebx), %eax
- jmp *%eax
+ leal relocated(%ebx), %eax
+ jmp *%eax
ENDPROC(startup_32)
-.section ".text"
+ .text
relocated:
/*
- * Clear BSS
- */
- xorl %eax,%eax
- leal _edata(%ebx),%edi
- leal _end(%ebx), %ecx
- subl %edi,%ecx
- cld
- rep
- stosb
-
-/*
- * Setup the stack for the decompressor
+ * Clear BSS (stack is currently empty)
*/
- leal boot_stack_end(%ebx), %esp
+ xorl %eax, %eax
+ leal _bss(%ebx), %edi
+ leal _ebss(%ebx), %ecx
+ subl %edi, %ecx
+ shrl $2, %ecx
+ rep stosl
/*
* Do the decompression, and jump to the new kernel..
*/
- movl output_len(%ebx), %eax
- pushl %eax
- # push arguments for decompress_kernel:
- pushl %ebp # output address
- movl input_len(%ebx), %eax
- pushl %eax # input_len
- leal input_data(%ebx), %eax
- pushl %eax # input_data
- leal boot_heap(%ebx), %eax
- pushl %eax # heap area
- pushl %esi # real mode pointer
- call decompress_kernel
- addl $20, %esp
- popl %ecx
+ leal z_extract_offset_negative(%ebx), %ebp
+ /* push arguments for decompress_kernel: */
+ pushl %ebp /* output address */
+ pushl $z_input_len /* input_len */
+ leal input_data(%ebx), %eax
+ pushl %eax /* input_data */
+ leal boot_heap(%ebx), %eax
+ pushl %eax /* heap area */
+ pushl %esi /* real mode pointer */
+ call decompress_kernel
+ addl $20, %esp
#if CONFIG_RELOCATABLE
-/* Find the address of the relocations.
+/*
+ * Find the address of the relocations.
*/
- movl %ebp, %edi
- addl %ecx, %edi
+ leal z_output_len(%ebp), %edi
-/* Calculate the delta between where vmlinux was compiled to run
+/*
+ * Calculate the delta between where vmlinux was compiled to run
* and where it was actually loaded.
*/
- movl %ebp, %ebx
- subl $LOAD_PHYSICAL_ADDR, %ebx
- jz 2f /* Nothing to be done if loaded at compiled addr. */
+ movl %ebp, %ebx
+ subl $LOAD_PHYSICAL_ADDR, %ebx
+ jz 2f /* Nothing to be done if loaded at compiled addr. */
/*
* Process relocations.
*/
-1: subl $4, %edi
- movl 0(%edi), %ecx
- testl %ecx, %ecx
- jz 2f
- addl %ebx, -__PAGE_OFFSET(%ebx, %ecx)
- jmp 1b
+1: subl $4, %edi
+ movl (%edi), %ecx
+ testl %ecx, %ecx
+ jz 2f
+ addl %ebx, -__PAGE_OFFSET(%ebx, %ecx)
+ jmp 1b
2:
#endif
/*
* Jump to the decompressed kernel.
*/
- xorl %ebx,%ebx
- jmp *%ebp
+ xorl %ebx, %ebx
+ jmp *%ebp
-.bss
-/* Stack and heap for uncompression */
-.balign 4
+/*
+ * Stack and heap for uncompression
+ */
+ .bss
+ .balign 4
boot_heap:
.fill BOOT_HEAP_SIZE, 1, 0
boot_stack:
/*
* High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
*/
-.code32
-.text
+ .code32
+ .text
#include <linux/linkage.h>
#include <asm/segment.h>
#include <asm/processor-flags.h>
#include <asm/asm-offsets.h>
-.section ".text.head"
+ .section ".text.head"
.code32
ENTRY(startup_32)
cld
- /* test KEEP_SEGMENTS flag to see if the bootloader is asking
- * us to not reload segments */
+ /*
+ * Test KEEP_SEGMENTS flag to see if the bootloader is asking
+ * us to not reload segments
+ */
testb $(1<<6), BP_loadflags(%esi)
jnz 1f
movl %eax, %ss
1:
-/* Calculate the delta between where we were compiled to run
+/*
+ * Calculate the delta between where we were compiled to run
* at and where we were actually loaded at. This can only be done
* with a short local call on x86. Nothing else will tell us what
* address we are running at. The reserved chunk of the real-mode
* data at 0x1e4 (defined as a scratch field) are used as the stack
* for this calculation. Only 4 bytes are needed.
*/
- leal (0x1e4+4)(%esi), %esp
+ leal (BP_scratch+4)(%esi), %esp
call 1f
1: popl %ebp
subl $1b, %ebp
testl %eax, %eax
jnz no_longmode
-/* Compute the delta between where we were compiled to run at
+/*
+ * Compute the delta between where we were compiled to run at
* and where the code will actually run at.
- */
-/* %ebp contains the address we are loaded at by the boot loader and %ebx
+ *
+ * %ebp contains the address we are loaded at by the boot loader and %ebx
* contains the address where we should move the kernel image temporarily
* for safe in-place decompression.
*/
#ifdef CONFIG_RELOCATABLE
movl %ebp, %ebx
- addl $(PMD_PAGE_SIZE -1), %ebx
- andl $PMD_PAGE_MASK, %ebx
+ movl BP_kernel_alignment(%esi), %eax
+ decl %eax
+ addl %eax, %ebx
+ notl %eax
+ andl %eax, %ebx
#else
- movl $CONFIG_PHYSICAL_START, %ebx
+ movl $LOAD_PHYSICAL_ADDR, %ebx
#endif
- /* Replace the compressed data size with the uncompressed size */
- subl input_len(%ebp), %ebx
- movl output_len(%ebp), %eax
- addl %eax, %ebx
- /* Add 8 bytes for every 32K input block */
- shrl $12, %eax
- addl %eax, %ebx
- /* Add 32K + 18 bytes of extra slack and align on a 4K boundary */
- addl $(32768 + 18 + 4095), %ebx
- andl $~4095, %ebx
+ /* Target address to relocate to for decompression */
+ addl $z_extract_offset, %ebx
/*
* Prepare for entering 64 bit mode
/*
* Build early 4G boot pagetable
*/
- /* Initialize Page tables to 0*/
+ /* Initialize Page tables to 0 */
leal pgtable(%ebx), %edi
xorl %eax, %eax
movl $((4096*6)/4), %ecx
btsl $_EFER_LME, %eax
wrmsr
- /* Setup for the jump to 64bit mode
+ /*
+ * Setup for the jump to 64bit mode
*
* When the jump is performend we will be in long mode but
* in 32bit compatibility mode with EFER.LME = 1, CS.L = 0, CS.D = 1
#include "../../kernel/verify_cpu_64.S"
- /* Be careful here startup_64 needs to be at a predictable
+ /*
+ * Be careful here startup_64 needs to be at a predictable
* address so I can export it in an ELF header. Bootloaders
* should look at the ELF header to find this address, as
* it may change in the future.
.code64
.org 0x200
ENTRY(startup_64)
- /* We come here either from startup_32 or directly from a
+ /*
+ * We come here either from startup_32 or directly from a
* 64bit bootloader. If we come here from a bootloader we depend on
* an identity mapped page table being provied that maps our
* entire text+data+bss and hopefully all of memory.
movl $0x20, %eax
ltr %ax
- /* Compute the decompressed kernel start address. It is where
+ /*
+ * Compute the decompressed kernel start address. It is where
* we were loaded at aligned to a 2M boundary. %rbp contains the
* decompressed kernel start address.
*
* If it is a relocatable kernel then decompress and run the kernel
* from load address aligned to 2MB addr, otherwise decompress and
- * run the kernel from CONFIG_PHYSICAL_START
+ * run the kernel from LOAD_PHYSICAL_ADDR
+ *
+ * We cannot rely on the calculation done in 32-bit mode, since we
+ * may have been invoked via the 64-bit entry point.
*/
/* Start with the delta to where the kernel will run at. */
#ifdef CONFIG_RELOCATABLE
leaq startup_32(%rip) /* - $startup_32 */, %rbp
- addq $(PMD_PAGE_SIZE - 1), %rbp
- andq $PMD_PAGE_MASK, %rbp
- movq %rbp, %rbx
+ movl BP_kernel_alignment(%rsi), %eax
+ decl %eax
+ addq %rax, %rbp
+ notq %rax
+ andq %rax, %rbp
#else
- movq $CONFIG_PHYSICAL_START, %rbp
- movq %rbp, %rbx
+ movq $LOAD_PHYSICAL_ADDR, %rbp
#endif
- /* Replace the compressed data size with the uncompressed size */
- movl input_len(%rip), %eax
- subq %rax, %rbx
- movl output_len(%rip), %eax
- addq %rax, %rbx
- /* Add 8 bytes for every 32K input block */
- shrq $12, %rax
- addq %rax, %rbx
- /* Add 32K + 18 bytes of extra slack and align on a 4K boundary */
- addq $(32768 + 18 + 4095), %rbx
- andq $~4095, %rbx
-
-/* Copy the compressed kernel to the end of our buffer
+ /* Target address to relocate to for decompression */
+ leaq z_extract_offset(%rbp), %rbx
+
+ /* Set up the stack */
+ leaq boot_stack_end(%rbx), %rsp
+
+ /* Zero EFLAGS */
+ pushq $0
+ popfq
+
+/*
+ * Copy the compressed kernel to the end of our buffer
* where decompression in place becomes safe.
*/
- leaq _end_before_pgt(%rip), %r8
- leaq _end_before_pgt(%rbx), %r9
- movq $_end_before_pgt /* - $startup_32 */, %rcx
-1: subq $8, %r8
- subq $8, %r9
- movq 0(%r8), %rax
- movq %rax, 0(%r9)
- subq $8, %rcx
- jnz 1b
+ pushq %rsi
+ leaq (_bss-8)(%rip), %rsi
+ leaq (_bss-8)(%rbx), %rdi
+ movq $_bss /* - $startup_32 */, %rcx
+ shrq $3, %rcx
+ std
+ rep movsq
+ cld
+ popq %rsi
/*
* Jump to the relocated address.
leaq relocated(%rbx), %rax
jmp *%rax
-.section ".text"
+ .text
relocated:
/*
- * Clear BSS
+ * Clear BSS (stack is currently empty)
*/
- xorq %rax, %rax
- leaq _edata(%rbx), %rdi
- leaq _end_before_pgt(%rbx), %rcx
+ xorl %eax, %eax
+ leaq _bss(%rip), %rdi
+ leaq _ebss(%rip), %rcx
subq %rdi, %rcx
- cld
- rep
- stosb
-
- /* Setup the stack */
- leaq boot_stack_end(%rip), %rsp
-
- /* zero EFLAGS after setting rsp */
- pushq $0
- popfq
+ shrq $3, %rcx
+ rep stosq
/*
* Do the decompression, and jump to the new kernel..
*/
- pushq %rsi # Save the real mode argument
- movq %rsi, %rdi # real mode address
- leaq boot_heap(%rip), %rsi # malloc area for uncompression
- leaq input_data(%rip), %rdx # input_data
- movl input_len(%rip), %eax
- movq %rax, %rcx # input_len
- movq %rbp, %r8 # output
+ pushq %rsi /* Save the real mode argument */
+ movq %rsi, %rdi /* real mode address */
+ leaq boot_heap(%rip), %rsi /* malloc area for uncompression */
+ leaq input_data(%rip), %rdx /* input_data */
+ movl $z_input_len, %ecx /* input_len */
+ movq %rbp, %r8 /* output target address */
call decompress_kernel
popq %rsi
.quad 0x0000000000000000 /* TS continued */
gdt_end:
-.bss
-/* Stack and heap for uncompression */
-.balign 4
+/*
+ * Stack and heap for uncompression
+ */
+ .bss
+ .balign 4
boot_heap:
.fill BOOT_HEAP_SIZE, 1, 0
boot_stack:
.fill BOOT_STACK_SIZE, 1, 0
boot_stack_end:
+
+/*
+ * Space for page tables (not in .bss so not zeroed)
+ */
+ .section ".pgtable","a",@nobits
+ .balign 4096
+pgtable:
+ .fill 6*4096, 1, 0
free_mem_ptr = heap; /* Heap */
free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
+ if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1))
+ error("Destination address inappropriately aligned");
#ifdef CONFIG_X86_64
- if ((unsigned long)output & (__KERNEL_ALIGN - 1))
- error("Destination address not 2M aligned");
- if ((unsigned long)output >= 0xffffffffffUL)
+ if (heap > 0x3fffffffffffUL)
error("Destination address too large");
#else
- if ((u32)output & (CONFIG_PHYSICAL_ALIGN - 1))
- error("Destination address not CONFIG_PHYSICAL_ALIGN aligned");
if (heap > ((-__PAGE_OFFSET-(512<<20)-1) & 0x7fffffff))
error("Destination address too large");
+#endif
#ifndef CONFIG_RELOCATABLE
- if ((u32)output != LOAD_PHYSICAL_ADDR)
+ if ((unsigned long)output != LOAD_PHYSICAL_ADDR)
error("Wrong destination address");
-#endif
#endif
if (!quiet)
--- /dev/null
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright (C) 2009 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * H. Peter Anvin <hpa@linux.intel.com>
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * Compute the desired load offset from a compressed program; outputs
+ * a small assembly wrapper with the appropriate symbols defined.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+
+static uint32_t getle32(const void *p)
+{
+ const uint8_t *cp = p;
+
+ return (uint32_t)cp[0] + ((uint32_t)cp[1] << 8) +
+ ((uint32_t)cp[2] << 16) + ((uint32_t)cp[3] << 24);
+}
+
+int main(int argc, char *argv[])
+{
+ uint32_t olen;
+ long ilen;
+ unsigned long offs;
+ FILE *f;
+
+ if (argc < 2) {
+ fprintf(stderr, "Usage: %s compressed_file\n", argv[0]);
+ return 1;
+ }
+
+ /* Get the information for the compressed kernel image first */
+
+ f = fopen(argv[1], "r");
+ if (!f) {
+ perror(argv[1]);
+ return 1;
+ }
+
+
+ if (fseek(f, -4L, SEEK_END)) {
+ perror(argv[1]);
+ }
+ fread(&olen, sizeof olen, 1, f);
+ ilen = ftell(f);
+ olen = getle32(&olen);
+ fclose(f);
+
+ /*
+ * Now we have the input (compressed) and output (uncompressed)
+ * sizes, compute the necessary decompression offset...
+ */
+
+ offs = (olen > ilen) ? olen - ilen : 0;
+ offs += olen >> 12; /* Add 8 bytes for each 32K block */
+ offs += 32*1024 + 18; /* Add 32K + 18 bytes slack */
+ offs = (offs+4095) & ~4095; /* Round to a 4K boundary */
+
+ printf(".section \".rodata.compressed\",\"a\",@progbits\n");
+ printf(".globl z_input_len\n");
+ printf("z_input_len = %lu\n", ilen);
+ printf(".globl z_output_len\n");
+ printf("z_output_len = %lu\n", (unsigned long)olen);
+ printf(".globl z_extract_offset\n");
+ printf("z_extract_offset = 0x%lx\n", offs);
+ /* z_extract_offset_negative allows simplification of head_32.S */
+ printf(".globl z_extract_offset_negative\n");
+ printf("z_extract_offset_negative = -0x%lx\n", offs);
+
+ printf(".globl input_data, input_data_end\n");
+ printf("input_data:\n");
+ printf(".incbin \"%s\"\n", argv[1]);
+ printf("input_data_end:\n");
+
+ return 0;
+}
-OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
+OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)
+
+#undef i386
+
+#include <asm/page_types.h>
+
+#ifdef CONFIG_X86_64
OUTPUT_ARCH(i386:x86-64)
ENTRY(startup_64)
+#else
+OUTPUT_ARCH(i386)
+ENTRY(startup_32)
+#endif
+
SECTIONS
{
/* Be careful parts of head_64.S assume startup_32 is at
*(.data.*)
_edata = . ;
}
+ . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
.bss : {
_bss = . ;
*(.bss)
*(.bss.*)
*(COMMON)
- . = ALIGN(8);
- _end_before_pgt = . ;
- . = ALIGN(4096);
- pgtable = . ;
- . = . + 4096 * 6;
+ . = ALIGN(8); /* For convenience during zeroing */
_ebss = .;
}
+#ifdef CONFIG_X86_64
+ . = ALIGN(PAGE_SIZE);
+ .pgtable : {
+ _pgtable = . ;
+ *(.pgtable)
+ _epgtable = . ;
+ }
+#endif
+ _end = .;
}
+++ /dev/null
-SECTIONS
-{
- .rodata.compressed : {
- input_len = .;
- LONG(input_data_end - input_data) input_data = .;
- *(.data)
- output_len = . - 4;
- input_data_end = .;
- }
-}
+++ /dev/null
-OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
-OUTPUT_ARCH(i386)
-ENTRY(startup_32)
-SECTIONS
-{
- /* Be careful parts of head_32.S assume startup_32 is at
- * address 0.
- */
- . = 0;
- .text.head : {
- _head = . ;
- *(.text.head)
- _ehead = . ;
- }
- .rodata.compressed : {
- *(.rodata.compressed)
- }
- .text : {
- _text = .; /* Text */
- *(.text)
- *(.text.*)
- _etext = . ;
- }
- .rodata : {
- _rodata = . ;
- *(.rodata) /* read-only data */
- *(.rodata.*)
- _erodata = . ;
- }
- .data : {
- _data = . ;
- *(.data)
- *(.data.*)
- _edata = . ;
- }
- .bss : {
- _bss = . ;
- *(.bss)
- *(.bss.*)
- *(COMMON)
- _end = . ;
- }
-}
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
*/
static int read_mbr(u8 devno, void *buf)
{
- u16 ax, bx, cx, dx;
+ struct biosregs ireg, oreg;
- ax = 0x0201; /* Legacy Read, one sector */
- cx = 0x0001; /* Sector 0-0-1 */
- dx = devno;
- bx = (size_t)buf;
- asm volatile("pushfl; stc; int $0x13; setc %%al; popfl"
- : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
- : : "esi", "edi", "memory");
+ initregs(&ireg);
+ ireg.ax = 0x0201; /* Legacy Read, one sector */
+ ireg.cx = 0x0001; /* Sector 0-0-1 */
+ ireg.dl = devno;
+ ireg.bx = (size_t)buf;
- return -(u8)ax; /* 0 or -1 */
+ intcall(0x13, &ireg, &oreg);
+
+ return -(oreg.eflags & X86_EFLAGS_CF); /* 0 or -1 */
}
static u32 read_mbr_sig(u8 devno, struct edd_info *ei, u32 *mbrsig)
static int get_edd_info(u8 devno, struct edd_info *ei)
{
- u16 ax, bx, cx, dx, di;
+ struct biosregs ireg, oreg;
memset(ei, 0, sizeof *ei);
/* Check Extensions Present */
- ax = 0x4100;
- bx = EDDMAGIC1;
- dx = devno;
- asm("pushfl; stc; int $0x13; setc %%al; popfl"
- : "+a" (ax), "+b" (bx), "=c" (cx), "+d" (dx)
- : : "esi", "edi");
+ initregs(&ireg);
+ ireg.ah = 0x41;
+ ireg.bx = EDDMAGIC1;
+ ireg.dl = devno;
+ intcall(0x13, &ireg, &oreg);
- if ((u8)ax)
+ if (oreg.eflags & X86_EFLAGS_CF)
return -1; /* No extended information */
- if (bx != EDDMAGIC2)
+ if (oreg.bx != EDDMAGIC2)
return -1;
ei->device = devno;
- ei->version = ax >> 8; /* EDD version number */
- ei->interface_support = cx; /* EDD functionality subsets */
+ ei->version = oreg.ah; /* EDD version number */
+ ei->interface_support = oreg.cx; /* EDD functionality subsets */
/* Extended Get Device Parameters */
ei->params.length = sizeof(ei->params);
- ax = 0x4800;
- dx = devno;
- asm("pushfl; int $0x13; popfl"
- : "+a" (ax), "+d" (dx), "=m" (ei->params)
- : "S" (&ei->params)
- : "ebx", "ecx", "edi");
+ ireg.ah = 0x48;
+ ireg.si = (size_t)&ei->params;
+ intcall(0x13, &ireg, &oreg);
/* Get legacy CHS parameters */
/* Ralf Brown recommends setting ES:DI to 0:0 */
- ax = 0x0800;
- dx = devno;
- di = 0;
- asm("pushw %%es; "
- "movw %%di,%%es; "
- "pushfl; stc; int $0x13; setc %%al; popfl; "
- "popw %%es"
- : "+a" (ax), "=b" (bx), "=c" (cx), "+d" (dx), "+D" (di)
- : : "esi");
-
- if ((u8)ax == 0) {
- ei->legacy_max_cylinder = (cx >> 8) + ((cx & 0xc0) << 2);
- ei->legacy_max_head = dx >> 8;
- ei->legacy_sectors_per_track = cx & 0x3f;
+ ireg.ah = 0x08;
+ ireg.es = 0;
+ intcall(0x13, &ireg, &oreg);
+
+ if (!(oreg.eflags & X86_EFLAGS_CF)) {
+ ei->legacy_max_cylinder = oreg.ch + ((oreg.cl & 0xc0) << 2);
+ ei->legacy_max_head = oreg.dh;
+ ei->legacy_sectors_per_track = oreg.cl & 0x3f;
}
return 0;
#include <asm/page_types.h>
#include <asm/setup.h>
#include "boot.h"
-#include "offsets.h"
+#include "voffset.h"
+#include "zoffset.h"
BOOTSEG = 0x07C0 /* original address of boot-sector */
SYSSEG = 0x1000 /* historical load address >> 4 */
# Part 2 of the header, from the old setup.S
.ascii "HdrS" # header signature
- .word 0x0209 # header version number (>= 0x0105)
+ .word 0x020a # header version number (>= 0x0105)
# or else old loadlin-1.5 will fail)
.globl realmode_swtch
realmode_swtch: .word 0, 0 # default_switch, SETUPSEG
# end of setup code can be used by setup
# for local heap purposes.
-pad1: .word 0
+ext_loader_ver:
+ .byte 0 # Extended boot loader version
+ext_loader_type:
+ .byte 0 # Extended boot loader type
+
cmd_line_ptr: .long 0 # (Header version 0x0202 or later)
# If nonzero, a 32-bit pointer
# to the kernel command line.
#else
relocatable_kernel: .byte 0
#endif
-pad2: .byte 0
+min_alignment: .byte MIN_KERNEL_ALIGN_LG2 # minimum alignment
pad3: .word 0
cmdline_size: .long COMMAND_LINE_SIZE-1 #length of the command line,
hardware_subarch_data: .quad 0
-payload_offset: .long input_data
-payload_length: .long input_data_end-input_data
+payload_offset: .long ZO_input_data
+payload_length: .long ZO_z_input_len
setup_data: .quad 0 # 64-bit physical pointer to
# single linked list of
# struct setup_data
+pref_address: .quad LOAD_PHYSICAL_ADDR # preferred load addr
+
+#define ZO_INIT_SIZE (ZO__end - ZO_startup_32 + ZO_z_extract_offset)
+#define VO_INIT_SIZE (VO__end - VO__text)
+#if ZO_INIT_SIZE > VO_INIT_SIZE
+#define INIT_SIZE ZO_INIT_SIZE
+#else
+#define INIT_SIZE VO_INIT_SIZE
+#endif
+init_size: .long INIT_SIZE # kernel initialization size
+
# End of setup header #####################################################
- .section ".inittext", "ax"
+ .section ".entrytext", "ax"
start_of_setup:
#ifdef SAFE_RESET_DISK_CONTROLLER
# Reset the disk controller.
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
*/
static void keyboard_set_repeat(void)
{
- u16 ax = 0x0305;
- u16 bx = 0;
- asm volatile("int $0x16"
- : "+a" (ax), "+b" (bx)
- : : "ecx", "edx", "esi", "edi");
+ struct biosregs ireg;
+ initregs(&ireg);
+ ireg.ax = 0x0305;
+ intcall(0x16, &ireg, NULL);
}
/*
*/
static void query_ist(void)
{
+ struct biosregs ireg, oreg;
+
/* Some older BIOSes apparently crash on this call, so filter
it from machines too old to have SpeedStep at all. */
if (cpu.level < 6)
return;
- asm("int $0x15"
- : "=a" (boot_params.ist_info.signature),
- "=b" (boot_params.ist_info.command),
- "=c" (boot_params.ist_info.event),
- "=d" (boot_params.ist_info.perf_level)
- : "a" (0x0000e980), /* IST Support */
- "d" (0x47534943)); /* Request value */
+ initregs(&ireg);
+ ireg.ax = 0xe980; /* IST Support */
+ ireg.edx = 0x47534943; /* Request value */
+ intcall(0x15, &ireg, &oreg);
+
+ boot_params.ist_info.signature = oreg.eax;
+ boot_params.ist_info.command = oreg.ebx;
+ boot_params.ist_info.event = oreg.ecx;
+ boot_params.ist_info.perf_level = oreg.edx;
}
/*
static void set_bios_mode(void)
{
#ifdef CONFIG_X86_64
- u32 eax, ebx;
+ struct biosregs ireg;
- eax = 0xec00;
- ebx = 2;
- asm volatile("int $0x15"
- : "+a" (eax), "+b" (ebx)
- : : "ecx", "edx", "esi", "edi");
+ initregs(&ireg);
+ ireg.ax = 0xec00;
+ ireg.bx = 2;
+ intcall(0x15, &ireg, NULL);
#endif
}
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
int query_mca(void)
{
- u8 err;
- u16 es, bx, len;
-
- asm("pushw %%es ; "
- "int $0x15 ; "
- "setc %0 ; "
- "movw %%es, %1 ; "
- "popw %%es"
- : "=acd" (err), "=acdSD" (es), "=b" (bx)
- : "a" (0xc000));
-
- if (err)
+ struct biosregs ireg, oreg;
+ u16 len;
+
+ initregs(&ireg);
+ ireg.ah = 0xc0;
+ intcall(0x15, &ireg, &oreg);
+
+ if (oreg.eflags & X86_EFLAGS_CF)
return -1; /* No MCA present */
- set_fs(es);
- len = rdfs16(bx);
+ set_fs(oreg.es);
+ len = rdfs16(oreg.bx);
if (len > sizeof(boot_params.sys_desc_table))
len = sizeof(boot_params.sys_desc_table);
- copy_from_fs(&boot_params.sys_desc_table, bx, len);
+ copy_from_fs(&boot_params.sys_desc_table, oreg.bx, len);
return 0;
}
static int detect_memory_e820(void)
{
int count = 0;
- u32 next = 0;
- u32 size, id, edi;
- u8 err;
+ struct biosregs ireg, oreg;
struct e820entry *desc = boot_params.e820_map;
static struct e820entry buf; /* static so it is zeroed */
+ initregs(&ireg);
+ ireg.ax = 0xe820;
+ ireg.cx = sizeof buf;
+ ireg.edx = SMAP;
+ ireg.di = (size_t)&buf;
+
/*
* Note: at least one BIOS is known which assumes that the
* buffer pointed to by one e820 call is the same one as
*/
do {
- size = sizeof buf;
-
- /* Important: %edx and %esi are clobbered by some BIOSes,
- so they must be either used for the error output
- or explicitly marked clobbered. Given that, assume there
- is something out there clobbering %ebp and %edi, too. */
- asm("pushl %%ebp; int $0x15; popl %%ebp; setc %0"
- : "=d" (err), "+b" (next), "=a" (id), "+c" (size),
- "=D" (edi), "+m" (buf)
- : "D" (&buf), "d" (SMAP), "a" (0xe820)
- : "esi");
+ intcall(0x15, &ireg, &oreg);
+ ireg.ebx = oreg.ebx; /* for next iteration... */
/* BIOSes which terminate the chain with CF = 1 as opposed
to %ebx = 0 don't always report the SMAP signature on
the final, failing, probe. */
- if (err)
+ if (oreg.eflags & X86_EFLAGS_CF)
break;
/* Some BIOSes stop returning SMAP in the middle of
screwed up the map at that point, we might have a
partial map, the full map, or complete garbage, so
just return failure. */
- if (id != SMAP) {
+ if (oreg.eax != SMAP) {
count = 0;
break;
}
*desc++ = buf;
count++;
- } while (next && count < ARRAY_SIZE(boot_params.e820_map));
+ } while (ireg.ebx && count < ARRAY_SIZE(boot_params.e820_map));
return boot_params.e820_entries = count;
}
static int detect_memory_e801(void)
{
- u16 ax, bx, cx, dx;
- u8 err;
+ struct biosregs ireg, oreg;
- bx = cx = dx = 0;
- ax = 0xe801;
- asm("stc; int $0x15; setc %0"
- : "=m" (err), "+a" (ax), "+b" (bx), "+c" (cx), "+d" (dx));
+ initregs(&ireg);
+ ireg.ax = 0xe801;
+ intcall(0x15, &ireg, &oreg);
- if (err)
+ if (oreg.eflags & X86_EFLAGS_CF)
return -1;
/* Do we really need to do this? */
- if (cx || dx) {
- ax = cx;
- bx = dx;
+ if (oreg.cx || oreg.dx) {
+ oreg.ax = oreg.cx;
+ oreg.bx = oreg.dx;
}
- if (ax > 15*1024)
+ if (oreg.ax > 15*1024) {
return -1; /* Bogus! */
-
- /* This ignores memory above 16MB if we have a memory hole
- there. If someone actually finds a machine with a memory
- hole at 16MB and no support for 0E820h they should probably
- generate a fake e820 map. */
- boot_params.alt_mem_k = (ax == 15*1024) ? (dx << 6)+ax : ax;
+ } else if (oreg.ax == 15*1024) {
+ boot_params.alt_mem_k = (oreg.dx << 6) + oreg.ax;
+ } else {
+ /*
+ * This ignores memory above 16MB if we have a memory
+ * hole there. If someone actually finds a machine
+ * with a memory hole at 16MB and no support for
+ * 0E820h they should probably generate a fake e820
+ * map.
+ */
+ boot_params.alt_mem_k = oreg.ax;
+ }
return 0;
}
static int detect_memory_88(void)
{
- u16 ax;
- u8 err;
+ struct biosregs ireg, oreg;
- ax = 0x8800;
- asm("stc; int $0x15; setc %0" : "=bcdm" (err), "+a" (ax));
+ initregs(&ireg);
+ ireg.ah = 0x88;
+ intcall(0x15, &ireg, &oreg);
- boot_params.screen_info.ext_mem_k = ax;
+ boot_params.screen_info.ext_mem_k = oreg.ax;
- return -err;
+ return -(oreg.eflags & X86_EFLAGS_CF); /* 0 or -1 */
}
int detect_memory(void)
--- /dev/null
+/* -----------------------------------------------------------------------
+ *
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
+ *
+ * This file is part of the Linux kernel, and is made available under
+ * the terms of the GNU General Public License version 2 or (at your
+ * option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * Simple helper function for initializing a register set.
+ *
+ * Note that this sets EFLAGS_CF in the input register set; this
+ * makes it easier to catch functions which do nothing but don't
+ * explicitly set CF.
+ */
+
+#include "boot.h"
+
+void initregs(struct biosregs *reg)
+{
+ memset(reg, 0, sizeof *reg);
+ reg->eflags |= X86_EFLAGS_CF;
+ reg->ds = ds();
+ reg->es = ds();
+ reg->fs = fs();
+ reg->gs = gs();
+}
. = 497;
.header : { *(.header) }
+ .entrytext : { *(.entrytext) }
.inittext : { *(.inittext) }
.initdata : { *(.initdata) }
+ __end_init = .;
+
.text : { *(.text) }
.text32 : { *(.text32) }
. = ASSERT(_end <= 0x8000, "Setup too big!");
. = ASSERT(hdr == 0x1f1, "The setup header has the wrong offset!");
+ /* Necessary for the very-old-loader check to work... */
+ . = ASSERT(__end_init <= 5*512, "init sections too big!");
+
}
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
void __attribute__((section(".inittext"))) putchar(int ch)
{
- unsigned char c = ch;
+ struct biosregs ireg;
- if (c == '\n')
+ if (ch == '\n')
putchar('\r'); /* \n -> \r\n */
- /* int $0x10 is known to have bugs involving touching registers
- it shouldn't. Be extra conservative... */
- asm volatile("pushal; pushw %%ds; int $0x10; popw %%ds; popal"
- : : "b" (0x0007), "c" (0x0001), "a" (0x0e00|ch));
+ initregs(&ireg);
+ ireg.bx = 0x0007;
+ ireg.cx = 0x0001;
+ ireg.ah = 0x0e;
+ ireg.al = ch;
+ intcall(0x10, &ireg, NULL);
}
void __attribute__((section(".inittext"))) puts(const char *str)
{
- int n = 0;
- while (*str) {
+ while (*str)
putchar(*str++);
- n++;
- }
}
/*
static u8 gettime(void)
{
- u16 ax = 0x0200;
- u16 cx, dx;
+ struct biosregs ireg, oreg;
- asm volatile("int $0x1a"
- : "+a" (ax), "=c" (cx), "=d" (dx)
- : : "ebx", "esi", "edi");
+ initregs(&ireg);
+ ireg.ah = 0x02;
+ intcall(0x1a, &ireg, &oreg);
- return dx >> 8;
+ return oreg.dh;
}
/*
*/
int getchar(void)
{
- u16 ax = 0;
- asm volatile("int $0x16" : "+a" (ax));
+ struct biosregs ireg, oreg;
+
+ initregs(&ireg);
+ /* ireg.ah = 0x00; */
+ intcall(0x16, &ireg, &oreg);
- return ax & 0xff;
+ return oreg.al;
}
static int kbd_pending(void)
{
- u8 pending;
- asm volatile("int $0x16; setnz %0"
- : "=qm" (pending)
- : "a" (0x0100));
- return pending;
+ struct biosregs ireg, oreg;
+
+ initregs(&ireg);
+ ireg.ah = 0x01;
+ intcall(0x16, &ireg, &oreg);
+
+ return !(oreg.eflags & X86_EFLAGS_ZF);
}
void kbd_flush(void)
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
static int set_bios_mode(u8 mode)
{
- u16 ax;
+ struct biosregs ireg, oreg;
u8 new_mode;
- ax = mode; /* AH=0x00 Set Video Mode */
- asm volatile(INT10
- : "+a" (ax)
- : : "ebx", "ecx", "edx", "esi", "edi");
+ initregs(&ireg);
+ ireg.al = mode; /* AH=0x00 Set Video Mode */
+ intcall(0x10, &ireg, NULL);
- ax = 0x0f00; /* Get Current Video Mode */
- asm volatile(INT10
- : "+a" (ax)
- : : "ebx", "ecx", "edx", "esi", "edi");
+
+ ireg.ah = 0x0f; /* Get Current Video Mode */
+ intcall(0x10, &ireg, &oreg);
do_restore = 1; /* Assume video contents were lost */
- new_mode = ax & 0x7f; /* Not all BIOSes are clean with the top bit */
+
+ /* Not all BIOSes are clean with the top bit */
+ new_mode = ireg.al & 0x7f;
if (new_mode == mode)
return 0; /* Mode change OK */
/* Mode setting failed, but we didn't end up where we
started. That's bad. Try to revert to the original
video mode. */
- ax = boot_params.screen_info.orig_video_mode;
- asm volatile(INT10
- : "+a" (ax)
- : : "ebx", "ecx", "edx", "esi", "edi");
+ ireg.ax = boot_params.screen_info.orig_video_mode;
+ intcall(0x10, &ireg, NULL);
}
#endif
return -1;
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
static int vesa_probe(void)
{
#if defined(CONFIG_VIDEO_VESA) || defined(CONFIG_FIRMWARE_EDID)
- u16 ax, cx, di;
+ struct biosregs ireg, oreg;
u16 mode;
addr_t mode_ptr;
struct mode_info *mi;
video_vesa.modes = GET_HEAP(struct mode_info, 0);
- ax = 0x4f00;
- di = (size_t)&vginfo;
- asm(INT10
- : "+a" (ax), "+D" (di), "=m" (vginfo)
- : : "ebx", "ecx", "edx", "esi");
+ initregs(&ireg);
+ ireg.ax = 0x4f00;
+ ireg.di = (size_t)&vginfo;
+ intcall(0x10, &ireg, &oreg);
- if (ax != 0x004f ||
+ if (ireg.ax != 0x004f ||
vginfo.signature != VESA_MAGIC ||
vginfo.version < 0x0102)
return 0; /* Not present */
memset(&vminfo, 0, sizeof vminfo); /* Just in case... */
- ax = 0x4f01;
- cx = mode;
- di = (size_t)&vminfo;
- asm(INT10
- : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo)
- : : "ebx", "edx", "esi");
+ ireg.ax = 0x4f01;
+ ireg.cx = mode;
+ ireg.di = (size_t)&vminfo;
+ intcall(0x10, &ireg, &oreg);
- if (ax != 0x004f)
+ if (ireg.ax != 0x004f)
continue;
if ((vminfo.mode_attr & 0x15) == 0x05) {
static int vesa_set_mode(struct mode_info *mode)
{
- u16 ax, bx, cx, di;
+ struct biosregs ireg, oreg;
int is_graphic;
u16 vesa_mode = mode->mode - VIDEO_FIRST_VESA;
memset(&vminfo, 0, sizeof vminfo); /* Just in case... */
- ax = 0x4f01;
- cx = vesa_mode;
- di = (size_t)&vminfo;
- asm(INT10
- : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo)
- : : "ebx", "edx", "esi");
+ initregs(&ireg);
+ ireg.ax = 0x4f01;
+ ireg.cx = vesa_mode;
+ ireg.di = (size_t)&vminfo;
+ intcall(0x10, &ireg, &oreg);
- if (ax != 0x004f)
+ if (oreg.ax != 0x004f)
return -1;
if ((vminfo.mode_attr & 0x15) == 0x05) {
}
- ax = 0x4f02;
- bx = vesa_mode;
- di = 0;
- asm volatile(INT10
- : "+a" (ax), "+b" (bx), "+D" (di)
- : : "ecx", "edx", "esi");
+ initregs(&ireg);
+ ireg.ax = 0x4f02;
+ ireg.bx = vesa_mode;
+ intcall(0x10, &ireg, &oreg);
- if (ax != 0x004f)
+ if (oreg.ax != 0x004f)
return -1;
graphic_mode = is_graphic;
/* Switch DAC to 8-bit mode */
static void vesa_dac_set_8bits(void)
{
+ struct biosregs ireg, oreg;
u8 dac_size = 6;
/* If possible, switch the DAC to 8-bit mode */
if (vginfo.capabilities & 1) {
- u16 ax, bx;
-
- ax = 0x4f08;
- bx = 0x0800;
- asm volatile(INT10
- : "+a" (ax), "+b" (bx)
- : : "ecx", "edx", "esi", "edi");
-
- if (ax == 0x004f)
- dac_size = bx >> 8;
+ initregs(&ireg);
+ ireg.ax = 0x4f08;
+ ireg.bh = 0x08;
+ intcall(0x10, &ireg, &oreg);
+ if (oreg.ax == 0x004f)
+ dac_size = oreg.bh;
}
/* Set the color sizes to the DAC size, and offsets to 0 */
- boot_params.screen_info.red_size = dac_size;
+ boot_params.screen_info.red_size = dac_size;
boot_params.screen_info.green_size = dac_size;
- boot_params.screen_info.blue_size = dac_size;
- boot_params.screen_info.rsvd_size = dac_size;
+ boot_params.screen_info.blue_size = dac_size;
+ boot_params.screen_info.rsvd_size = dac_size;
- boot_params.screen_info.red_pos = 0;
- boot_params.screen_info.green_pos = 0;
- boot_params.screen_info.blue_pos = 0;
- boot_params.screen_info.rsvd_pos = 0;
+ boot_params.screen_info.red_pos = 0;
+ boot_params.screen_info.green_pos = 0;
+ boot_params.screen_info.blue_pos = 0;
+ boot_params.screen_info.rsvd_pos = 0;
}
/* Save the VESA protected mode info */
static void vesa_store_pm_info(void)
{
- u16 ax, bx, di, es;
+ struct biosregs ireg, oreg;
- ax = 0x4f0a;
- bx = di = 0;
- asm("pushw %%es; "INT10"; movw %%es,%0; popw %%es"
- : "=d" (es), "+a" (ax), "+b" (bx), "+D" (di)
- : : "ecx", "esi");
+ initregs(&ireg);
+ ireg.ax = 0x4f0a;
+ intcall(0x10, &ireg, &oreg);
- if (ax != 0x004f)
+ if (oreg.ax != 0x004f)
return;
- boot_params.screen_info.vesapm_seg = es;
- boot_params.screen_info.vesapm_off = di;
+ boot_params.screen_info.vesapm_seg = oreg.es;
+ boot_params.screen_info.vesapm_off = oreg.di;
}
/*
void vesa_store_edid(void)
{
#ifdef CONFIG_FIRMWARE_EDID
- u16 ax, bx, cx, dx, di;
+ struct biosregs ireg, oreg;
/* Apparently used as a nonsense token... */
memset(&boot_params.edid_info, 0x13, sizeof boot_params.edid_info);
if (vginfo.version < 0x0200)
return; /* EDID requires VBE 2.0+ */
- ax = 0x4f15; /* VBE DDC */
- bx = 0x0000; /* Report DDC capabilities */
- cx = 0; /* Controller 0 */
- di = 0; /* ES:DI must be 0 by spec */
-
- /* Note: The VBE DDC spec is different from the main VESA spec;
- we genuinely have to assume all registers are destroyed here. */
-
- asm("pushw %%es; movw %2,%%es; "INT10"; popw %%es"
- : "+a" (ax), "+b" (bx), "+c" (cx), "+D" (di)
- : : "esi", "edx");
+ initregs(&ireg);
+ ireg.ax = 0x4f15; /* VBE DDC */
+ /* ireg.bx = 0x0000; */ /* Report DDC capabilities */
+ /* ireg.cx = 0; */ /* Controller 0 */
+ ireg.es = 0; /* ES:DI must be 0 by spec */
+ intcall(0x10, &ireg, &oreg);
- if (ax != 0x004f)
+ if (oreg.ax != 0x004f)
return; /* No EDID */
/* BH = time in seconds to transfer EDD information */
/* BL = DDC level supported */
- ax = 0x4f15; /* VBE DDC */
- bx = 0x0001; /* Read EDID */
- cx = 0; /* Controller 0 */
- dx = 0; /* EDID block number */
- di =(size_t) &boot_params.edid_info; /* (ES:)Pointer to block */
- asm(INT10
- : "+a" (ax), "+b" (bx), "+d" (dx), "=m" (boot_params.edid_info),
- "+c" (cx), "+D" (di)
- : : "esi");
+ ireg.ax = 0x4f15; /* VBE DDC */
+ ireg.bx = 0x0001; /* Read EDID */
+ /* ireg.cx = 0; */ /* Controller 0 */
+ /* ireg.dx = 0; */ /* EDID block number */
+ ireg.es = ds();
+ ireg.di =(size_t)&boot_params.edid_info; /* (ES:)Pointer to block */
+ intcall(0x10, &ireg, &oreg);
#endif /* CONFIG_FIRMWARE_EDID */
}
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
/* Set basic 80x25 mode */
static u8 vga_set_basic_mode(void)
{
+ struct biosregs ireg, oreg;
u16 ax;
u8 rows;
u8 mode;
+ initregs(&ireg);
+
#ifdef CONFIG_VIDEO_400_HACK
if (adapter >= ADAPTER_VGA) {
- asm volatile(INT10
- : : "a" (0x1202), "b" (0x0030)
- : "ecx", "edx", "esi", "edi");
+ ireg.ax = 0x1202;
+ ireg.bx = 0x0030;
+ intcall(0x10, &ireg, NULL);
}
#endif
ax = 0x0f00;
- asm volatile(INT10
- : "+a" (ax)
- : : "ebx", "ecx", "edx", "esi", "edi");
-
- mode = (u8)ax;
+ intcall(0x10, &ireg, &oreg);
+ mode = oreg.al;
set_fs(0);
rows = rdfs8(0x484); /* rows minus one */
#ifndef CONFIG_VIDEO_400_HACK
- if ((ax == 0x5003 || ax == 0x5007) &&
+ if ((oreg.ax == 0x5003 || oreg.ax == 0x5007) &&
(rows == 0 || rows == 24))
return mode;
#endif
mode = 3;
/* Set the mode */
- ax = mode;
- asm volatile(INT10
- : "+a" (ax)
- : : "ebx", "ecx", "edx", "esi", "edi");
+ ireg.ax = mode; /* AH=0: set mode */
+ intcall(0x10, &ireg, NULL);
do_restore = 1;
return mode;
}
static void vga_set_8font(void)
{
/* Set 8x8 font - 80x43 on EGA, 80x50 on VGA */
+ struct biosregs ireg;
+
+ initregs(&ireg);
/* Set 8x8 font */
- asm volatile(INT10 : : "a" (0x1112), "b" (0));
+ ireg.ax = 0x1112;
+ /* ireg.bl = 0; */
+ intcall(0x10, &ireg, NULL);
/* Use alternate print screen */
- asm volatile(INT10 : : "a" (0x1200), "b" (0x20));
+ ireg.ax = 0x1200;
+ ireg.bl = 0x20;
+ intcall(0x10, &ireg, NULL);
/* Turn off cursor emulation */
- asm volatile(INT10 : : "a" (0x1201), "b" (0x34));
+ ireg.ax = 0x1201;
+ ireg.bl = 0x34;
+ intcall(0x10, &ireg, NULL);
/* Cursor is scan lines 6-7 */
- asm volatile(INT10 : : "a" (0x0100), "c" (0x0607));
+ ireg.ax = 0x0100;
+ ireg.cx = 0x0607;
+ intcall(0x10, &ireg, NULL);
}
static void vga_set_14font(void)
{
/* Set 9x14 font - 80x28 on VGA */
+ struct biosregs ireg;
+
+ initregs(&ireg);
/* Set 9x14 font */
- asm volatile(INT10 : : "a" (0x1111), "b" (0));
+ ireg.ax = 0x1111;
+ /* ireg.bl = 0; */
+ intcall(0x10, &ireg, NULL);
/* Turn off cursor emulation */
- asm volatile(INT10 : : "a" (0x1201), "b" (0x34));
+ ireg.ax = 0x1201;
+ ireg.bl = 0x34;
+ intcall(0x10, &ireg, NULL);
/* Cursor is scan lines 11-12 */
- asm volatile(INT10 : : "a" (0x0100), "c" (0x0b0c));
+ ireg.ax = 0x0100;
+ ireg.cx = 0x0b0c;
+ intcall(0x10, &ireg, NULL);
}
static void vga_set_80x43(void)
{
/* Set 80x43 mode on VGA (not EGA) */
+ struct biosregs ireg;
+
+ initregs(&ireg);
/* Set 350 scans */
- asm volatile(INT10 : : "a" (0x1201), "b" (0x30));
+ ireg.ax = 0x1201;
+ ireg.bl = 0x30;
+ intcall(0x10, &ireg, NULL);
/* Reset video mode */
- asm volatile(INT10 : : "a" (0x0003));
+ ireg.ax = 0x0003;
+ intcall(0x10, &ireg, NULL);
vga_set_8font();
}
*/
static int vga_probe(void)
{
- u16 ega_bx;
-
static const char *card_name[] = {
"CGA/MDA/HGC", "EGA", "VGA"
};
sizeof(ega_modes)/sizeof(struct mode_info),
sizeof(vga_modes)/sizeof(struct mode_info),
};
- u8 vga_flag;
- asm(INT10
- : "=b" (ega_bx)
- : "a" (0x1200), "b" (0x10) /* Check EGA/VGA */
- : "ecx", "edx", "esi", "edi");
+ struct biosregs ireg, oreg;
+
+ initregs(&ireg);
+
+ ireg.ax = 0x1200;
+ ireg.bl = 0x10; /* Check EGA/VGA */
+ intcall(0x10, &ireg, &oreg);
#ifndef _WAKEUP
- boot_params.screen_info.orig_video_ega_bx = ega_bx;
+ boot_params.screen_info.orig_video_ega_bx = oreg.bx;
#endif
/* If we have MDA/CGA/HGC then BL will be unchanged at 0x10 */
- if ((u8)ega_bx != 0x10) {
+ if (oreg.bl != 0x10) {
/* EGA/VGA */
- asm(INT10
- : "=a" (vga_flag)
- : "a" (0x1a00)
- : "ebx", "ecx", "edx", "esi", "edi");
+ ireg.ax = 0x1a00;
+ intcall(0x10, &ireg, &oreg);
- if (vga_flag == 0x1a) {
+ if (oreg.al == 0x1a) {
adapter = ADAPTER_VGA;
#ifndef _WAKEUP
boot_params.screen_info.orig_video_isVGA = 1;
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
static void store_cursor_position(void)
{
- u16 curpos;
- u16 ax, bx;
+ struct biosregs ireg, oreg;
- ax = 0x0300;
- bx = 0;
- asm(INT10
- : "=d" (curpos), "+a" (ax), "+b" (bx)
- : : "ecx", "esi", "edi");
+ initregs(&ireg);
+ ireg.ah = 0x03;
+ intcall(0x10, &ireg, &oreg);
- boot_params.screen_info.orig_x = curpos;
- boot_params.screen_info.orig_y = curpos >> 8;
+ boot_params.screen_info.orig_x = oreg.dl;
+ boot_params.screen_info.orig_y = oreg.dh;
}
static void store_video_mode(void)
{
- u16 ax, page;
+ struct biosregs ireg, oreg;
/* N.B.: the saving of the video page here is a bit silly,
since we pretty much assume page 0 everywhere. */
- ax = 0x0f00;
- asm(INT10
- : "+a" (ax), "=b" (page)
- : : "ecx", "edx", "esi", "edi");
+ initregs(&ireg);
+ ireg.ah = 0x0f;
+ intcall(0x10, &ireg, &oreg);
/* Not all BIOSes are clean with respect to the top bit */
- boot_params.screen_info.orig_video_mode = ax & 0x7f;
- boot_params.screen_info.orig_video_page = page >> 8;
+ boot_params.screen_info.orig_video_mode = oreg.al & 0x7f;
+ boot_params.screen_info.orig_video_page = oreg.bh;
}
/*
int y;
addr_t dst = 0;
u16 *src = saved.data;
- u16 ax, bx, dx;
+ struct biosregs ireg;
if (graphic_mode)
return; /* Can't restore onto a graphic mode */
}
/* Restore cursor position */
- ax = 0x0200; /* Set cursor position */
- bx = 0; /* Page number (<< 8) */
- dx = (saved.cury << 8)+saved.curx;
- asm volatile(INT10
- : "+a" (ax), "+b" (bx), "+d" (dx)
- : : "ecx", "esi", "edi");
+ initregs(&ireg);
+ ireg.ah = 0x02; /* Set cursor position */
+ ireg.dh = saved.cury;
+ ireg.dl = saved.curx;
+ intcall(0x10, &ireg, NULL);
}
#else
#define save_screen() ((void)0)
extern int do_restore; /* Restore screen contents */
extern int graphic_mode; /* Graphics mode with linear frame buffer */
-/*
- * int $0x10 is notorious for touching registers it shouldn't.
- * gcc doesn't like %ebp being clobbered, so define it as a push/pop
- * sequence here.
- *
- * A number of systems, including the original PC can clobber %bp in
- * certain circumstances, like when scrolling. There exists at least
- * one Trident video card which could clobber DS under a set of
- * circumstances that we are unlikely to encounter (scrolling when
- * using an extended graphics mode of more than 800x600 pixels), but
- * it's cheap insurance to deal with that here.
- */
-#define INT10 "pushl %%ebp; pushw %%ds; int $0x10; popw %%ds; popl %%ebp"
-
/* Accessing VGA indexed registers */
static inline u8 in_idx(u16 port, u8 index)
{
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.29-rc4
-# Tue Feb 24 15:50:58 2009
+# Linux kernel version: 2.6.30-rc2
+# Mon May 11 16:21:55 2009
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
CONFIG_X86=y
+CONFIG_OUTPUT_FORMAT="elf32-i386"
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
+CONFIG_HAVE_DYNAMIC_PER_CPU_AREA=y
# CONFIG_HAVE_CPUMASK_OF_CPU_MAP is not set
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_AUDIT_ARCH is not set
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
+CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_GENERIC_HARDIRQS=y
+CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
-CONFIG_X86_SMP=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_X86_32_SMP=y
CONFIG_X86_HT=y
-CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
+CONFIG_X86_32_LAZY_GS=y
CONFIG_KTIME_SCALAR=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_HAVE_KERNEL_GZIP=y
+CONFIG_HAVE_KERNEL_BZIP2=y
+CONFIG_HAVE_KERNEL_LZMA=y
+CONFIG_KERNEL_GZIP=y
+# CONFIG_KERNEL_BZIP2 is not set
+# CONFIG_KERNEL_LZMA is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
+CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_BSD_PROCESS_ACCT=y
# CONFIG_BSD_PROCESS_ACCT_V3 is not set
CONFIG_TASKSTATS=y
CONFIG_NET_NS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
+CONFIG_RD_GZIP=y
+CONFIG_RD_BZIP2=y
+CONFIG_RD_LZMA=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
+CONFIG_ANON_INODES=y
# CONFIG_EMBEDDED is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_EXTRA_PASS=y
+# CONFIG_STRIP_ASM_SYMS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
-# CONFIG_COMPAT_BRK is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
-CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
+# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+# CONFIG_SLOW_WORK is not set
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
# CONFIG_LBD is not set
-CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_BLK_DEV_BSG=y
# CONFIG_BLK_DEV_INTEGRITY is not set
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
CONFIG_SPARSE_IRQ=y
-CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
+# CONFIG_X86_BIGSMP is not set
+CONFIG_X86_EXTENDED_PLATFORM=y
# CONFIG_X86_ELAN is not set
-# CONFIG_X86_GENERICARCH is not set
-# CONFIG_X86_VSMP is not set
# CONFIG_X86_RDC321X is not set
+# CONFIG_X86_32_NON_STANDARD is not set
CONFIG_SCHED_OMIT_FRAME_POINTER=y
# CONFIG_PARAVIRT_GUEST is not set
# CONFIG_MEMTEST is not set
# CONFIG_GENERIC_CPU is not set
CONFIG_X86_GENERIC=y
CONFIG_X86_CPU=y
+CONFIG_X86_L1_CACHE_BYTES=64
+CONFIG_X86_INTERNODE_CACHE_BYTES=64
CONFIG_X86_CMPXCHG=y
-CONFIG_X86_L1_CACHE_SHIFT=7
+CONFIG_X86_L1_CACHE_SHIFT=5
CONFIG_X86_XADD=y
# CONFIG_X86_PPRO_FENCE is not set
CONFIG_X86_WP_WORKS_OK=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_CYRIX_32=y
CONFIG_CPU_SUP_AMD=y
-CONFIG_CPU_SUP_CENTAUR_32=y
+CONFIG_CPU_SUP_CENTAUR=y
CONFIG_CPU_SUP_TRANSMETA_32=y
CONFIG_CPU_SUP_UMC_32=y
CONFIG_X86_DS=y
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
+# CONFIG_X86_CPU_DEBUG is not set
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_UNEVICTABLE_LRU=y
+CONFIG_HAVE_MLOCK=y
+CONFIG_HAVE_MLOCKED_PAGE_BIT=y
CONFIG_HIGHPTE=y
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK=y
CONFIG_X86_PAT=y
CONFIG_EFI=y
CONFIG_SECCOMP=y
+# CONFIG_CC_STACKPROTECTOR is not set
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_CRASH_DUMP=y
# CONFIG_KEXEC_JUMP is not set
CONFIG_PHYSICAL_START=0x1000000
-# CONFIG_RELOCATABLE is not set
-CONFIG_PHYSICAL_ALIGN=0x200000
+CONFIG_RELOCATABLE=y
+CONFIG_X86_NEED_RELOCS=y
+CONFIG_PHYSICAL_ALIGN=0x1000000
CONFIG_HOTPLUG_CPU=y
# CONFIG_COMPAT_VDSO is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
# CONFIG_ACPI_PCI_SLOT is not set
-CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=y
# CONFIG_ACPI_SBS is not set
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_DOMAINS=y
+# CONFIG_DMAR is not set
CONFIG_PCIEPORTBUS=y
# CONFIG_HOTPLUG_PCI_PCIE is not set
CONFIG_PCIEAER=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
CONFIG_HT_IRQ=y
+# CONFIG_PCI_IOV is not set
CONFIG_ISA_DMA_API=y
# CONFIG_ISA is not set
# CONFIG_MCA is not set
#
# Networking options
#
-CONFIG_COMPAT_NET_DEV_OPS=y
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
+# CONFIG_PHONET is not set
CONFIG_NET_SCHED=y
#
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
+# CONFIG_NET_DROP_MONITOR is not set
CONFIG_HAMRADIO=y
#
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
-# CONFIG_PHONET is not set
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
CONFIG_CFG80211=y
# CONFIG_CFG80211_REG_DEBUG is not set
-CONFIG_NL80211=y
CONFIG_WIRELESS_OLD_REGULATORY=y
CONFIG_WIRELESS_EXT=y
CONFIG_WIRELESS_EXT_SYSFS=y
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_HP_ILO is not set
+# CONFIG_ISL29003 is not set
# CONFIG_C2PORT is not set
#
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_LOWLEVEL_PCMCIA is not set
# CONFIG_SCSI_DH is not set
+# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_ACPI=y
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
+CONFIG_COMPAT_NET_DEV_OPS=y
# CONFIG_IFB is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
CONFIG_NET_VENDOR_3COM=y
# CONFIG_VORTEX is not set
# CONFIG_TYPHOON is not set
+# CONFIG_ETHOC is not set
+# CONFIG_DNET is not set
CONFIG_NET_TULIP=y
# CONFIG_DE2104X is not set
# CONFIG_TULIP is not set
CONFIG_E1000E=y
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
+# CONFIG_IGBVF is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
+# CONFIG_ATL1C is not set
# CONFIG_JME is not set
CONFIG_NETDEV_10000=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_IXGBE is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
+# CONFIG_VXGE is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_NIU is not set
# CONFIG_BNX2X is not set
# CONFIG_QLGE is not set
# CONFIG_SFC is not set
+# CONFIG_BE2NET is not set
CONFIG_TR=y
# CONFIG_IBMOL is not set
# CONFIG_IBMLS is not set
# CONFIG_LIBERTAS is not set
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_AIRO is not set
-# CONFIG_HERMES is not set
# CONFIG_ATMEL is not set
+# CONFIG_AT76C50X_USB is not set
# CONFIG_AIRO_CS is not set
# CONFIG_PCMCIA_WL3501 is not set
# CONFIG_PRISM54 is not set
# CONFIG_RTL8187 is not set
# CONFIG_ADM8211 is not set
# CONFIG_MAC80211_HWSIM is not set
+# CONFIG_MWL8K is not set
# CONFIG_P54_COMMON is not set
CONFIG_ATH5K=y
# CONFIG_ATH5K_DEBUG is not set
# CONFIG_ATH9K is not set
+# CONFIG_AR9170_USB is not set
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
-# CONFIG_IWLCORE is not set
-# CONFIG_IWLWIFI_LEDS is not set
-# CONFIG_IWLAGN is not set
-# CONFIG_IWL3945 is not set
+# CONFIG_IWLWIFI is not set
# CONFIG_HOSTAP is not set
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_ZD1211RW is not set
# CONFIG_RT2X00 is not set
+# CONFIG_HERMES is not set
#
# Enable WiMAX (Networking options) to see the WiMAX drivers
# CONFIG_TABLET_USB_KBTAB is not set
# CONFIG_TABLET_USB_WACOM is not set
CONFIG_INPUT_TOUCHSCREEN=y
+# CONFIG_TOUCHSCREEN_AD7879_I2C is not set
+# CONFIG_TOUCHSCREEN_AD7879 is not set
# CONFIG_TOUCHSCREEN_FUJITSU is not set
# CONFIG_TOUCHSCREEN_GUNZE is not set
# CONFIG_TOUCHSCREEN_ELO is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
+# CONFIG_HW_RANDOM_TIMERIOMEM is not set
CONFIG_HW_RANDOM_INTEL=y
CONFIG_HW_RANDOM_AMD=y
CONFIG_HW_RANDOM_GEODE=y
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCA9539 is not set
-# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_K8TEMP is not set
# CONFIG_SENSORS_ASB100 is not set
+# CONFIG_SENSORS_ATK0110 is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_FSCHER is not set
# CONFIG_SENSORS_FSCPOS is not set
# CONFIG_SENSORS_FSCHMD is not set
+# CONFIG_SENSORS_G760A is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_CORETEMP is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
+# CONFIG_SENSORS_LTC4215 is not set
# CONFIG_SENSORS_LTC4245 is not set
+# CONFIG_SENSORS_LM95241 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
+# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_VT8623 is not set
-# CONFIG_FB_CYBLA is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
# CONFIG_FB_PM3 is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
+# CONFIG_FB_BROADSHEET is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_SND_INDIGO is not set
# CONFIG_SND_INDIGOIO is not set
# CONFIG_SND_INDIGODJ is not set
+# CONFIG_SND_INDIGOIOX is not set
+# CONFIG_SND_INDIGODJX is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
#
# Special HID drivers
#
-CONFIG_HID_COMPAT=y
CONFIG_HID_A4TECH=y
CONFIG_HID_APPLE=y
CONFIG_HID_BELKIN=y
CONFIG_HID_CHERRY=y
CONFIG_HID_CHICONY=y
CONFIG_HID_CYPRESS=y
+# CONFIG_DRAGONRISE_FF is not set
CONFIG_HID_EZKEY=y
+CONFIG_HID_KYE=y
CONFIG_HID_GYRATION=y
+CONFIG_HID_KENSINGTON=y
CONFIG_HID_LOGITECH=y
CONFIG_LOGITECH_FF=y
# CONFIG_LOGIRUMBLEPAD2_FF is not set
# CONFIG_USB_TMC is not set
#
-# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may also be needed;
+# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#
#
-# see USB_STORAGE Help for more information
+# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
-# CONFIG_USB_PHIDGET is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
#
# OTG and related infrastructure
#
+# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_UWB is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
#
# CONFIG_LEDS_ALIX2 is not set
# CONFIG_LEDS_PCA9532 is not set
+# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_PCA955X is not set
+# CONFIG_LEDS_BD2802 is not set
#
# LED Triggers
# CONFIG_LEDS_TRIGGER_HEARTBEAT is not set
# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set
# CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set
+
+#
+# iptables trigger is under Netfilter config (LED target)
+#
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
CONFIG_EDAC=y
# DMA Devices
#
# CONFIG_INTEL_IOATDMA is not set
+# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
# CONFIG_STAGING is not set
CONFIG_X86_PLATFORM_DEVICES=y
#
# CONFIG_EXT2_FS is not set
CONFIG_EXT3_FS=y
+# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
# CONFIG_FUSE_FS is not set
CONFIG_GENERIC_ACL=y
+#
+# Caches
+#
+# CONFIG_FSCACHE is not set
+
#
# CD-ROM/DVD Filesystems
#
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
+# CONFIG_NILFS2_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
-# CONFIG_SUNRPC_REGISTER_V4 is not set
CONFIG_RPCSEC_GSS_KRB5=y
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_DETECT_SOFTLOCKUP is not set
+# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_SCHED_DEBUG is not set
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+CONFIG_STACKTRACE=y
# CONFIG_DEBUG_KOBJECT is not set
# CONFIG_DEBUG_HIGHMEM is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
+# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_USER_STACKTRACE_SUPPORT=y
+CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_HW_BRANCH_TRACER=y
+CONFIG_HAVE_FTRACE_SYSCALLS=y
+CONFIG_RING_BUFFER=y
+CONFIG_TRACING=y
+CONFIG_TRACING_SUPPORT=y
#
# Tracers
# CONFIG_SYSPROF_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_CONTEXT_SWITCH_TRACER is not set
+# CONFIG_EVENT_TRACER is not set
+# CONFIG_FTRACE_SYSCALLS is not set
# CONFIG_BOOT_TRACER is not set
# CONFIG_TRACE_BRANCH_PROFILING is not set
# CONFIG_POWER_TRACER is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_HW_BRANCH_TRACER is not set
+# CONFIG_KMEMTRACE is not set
+# CONFIG_WORKQUEUE_TRACER is not set
+CONFIG_BLK_DEV_IO_TRACE=y
+# CONFIG_FTRACE_STARTUP_TEST is not set
+# CONFIG_MMIOTRACE is not set
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
-# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
+# CONFIG_DYNAMIC_DEBUG is not set
+# CONFIG_DMA_API_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACK_USAGE=y
-# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
# CONFIG_X86_PTDUMP is not set
CONFIG_DEBUG_RODATA=y
CONFIG_DEBUG_NX_TEST=m
# CONFIG_4KSTACKS is not set
CONFIG_DOUBLEFAULT=y
-# CONFIG_MMIOTRACE is not set
+CONFIG_HAVE_MMIOTRACE_SUPPORT=y
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=1
# CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX is not set
# CONFIG_SECURITY_SMACK is not set
+# CONFIG_SECURITY_TOMOYO is not set
+# CONFIG_IMA is not set
CONFIG_CRYPTO=y
#
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_PCOMP=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
+CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=y
# CONFIG_CRYPTO_TEST is not set
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
+# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set
#
# CONFIG_CRYPTO_DEV_GEODE is not set
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
CONFIG_HAVE_KVM=y
+CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_VIRTUALIZATION=y
# CONFIG_KVM is not set
# CONFIG_LGUEST is not set
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_BALLOON is not set
+CONFIG_BINARY_PRINTF=y
#
# Library routines
# CONFIG_LIBCRC32C is not set
CONFIG_AUDIT_GENERIC=y
CONFIG_ZLIB_INFLATE=y
-CONFIG_PLIST=y
+CONFIG_DECOMPRESS_GZIP=y
+CONFIG_DECOMPRESS_BZIP2=y
+CONFIG_DECOMPRESS_LZMA=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
+CONFIG_NLATTR=y
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.29-rc4
-# Tue Feb 24 15:44:16 2009
+# Linux kernel version: 2.6.30-rc2
+# Mon May 11 16:22:00 2009
#
CONFIG_64BIT=y
# CONFIG_X86_32 is not set
CONFIG_X86_64=y
CONFIG_X86=y
+CONFIG_OUTPUT_FORMAT="elf64-x86-64"
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
+CONFIG_HAVE_DYNAMIC_PER_CPU_AREA=y
CONFIG_HAVE_CPUMASK_OF_CPU_MAP=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_AUDIT_ARCH=y
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
+CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_GENERIC_HARDIRQS=y
+CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
-CONFIG_X86_SMP=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_X86_64_SMP=y
CONFIG_X86_HT=y
-CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
# CONFIG_KTIME_SCALAR is not set
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_HAVE_KERNEL_GZIP=y
+CONFIG_HAVE_KERNEL_BZIP2=y
+CONFIG_HAVE_KERNEL_LZMA=y
+CONFIG_KERNEL_GZIP=y
+# CONFIG_KERNEL_BZIP2 is not set
+# CONFIG_KERNEL_LZMA is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
+CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_BSD_PROCESS_ACCT=y
# CONFIG_BSD_PROCESS_ACCT_V3 is not set
CONFIG_TASKSTATS=y
CONFIG_NET_NS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
+CONFIG_RD_GZIP=y
+CONFIG_RD_BZIP2=y
+CONFIG_RD_LZMA=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
+CONFIG_ANON_INODES=y
# CONFIG_EMBEDDED is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_EXTRA_PASS=y
+# CONFIG_STRIP_ASM_SYMS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
-# CONFIG_COMPAT_BRK is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
-CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
+# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+# CONFIG_SLOW_WORK is not set
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
-CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_BLK_DEV_BSG=y
# CONFIG_BLK_DEV_INTEGRITY is not set
CONFIG_BLOCK_COMPAT=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
CONFIG_SPARSE_IRQ=y
-# CONFIG_NUMA_MIGRATE_IRQ_DESC is not set
-CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
-# CONFIG_X86_ELAN is not set
-# CONFIG_X86_GENERICARCH is not set
+CONFIG_X86_EXTENDED_PLATFORM=y
# CONFIG_X86_VSMP is not set
+# CONFIG_X86_UV is not set
CONFIG_SCHED_OMIT_FRAME_POINTER=y
# CONFIG_PARAVIRT_GUEST is not set
# CONFIG_MEMTEST is not set
# CONFIG_MCORE2 is not set
CONFIG_GENERIC_CPU=y
CONFIG_X86_CPU=y
-CONFIG_X86_L1_CACHE_BYTES=128
-CONFIG_X86_INTERNODE_CACHE_BYTES=128
+CONFIG_X86_L1_CACHE_BYTES=64
+CONFIG_X86_INTERNODE_CACHE_BYTES=64
CONFIG_X86_CMPXCHG=y
-CONFIG_X86_L1_CACHE_SHIFT=7
+CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
-CONFIG_CPU_SUP_CENTAUR_64=y
+CONFIG_CPU_SUP_CENTAUR=y
CONFIG_X86_DS=y
CONFIG_X86_PTRACE_BTS=y
CONFIG_HPET_TIMER=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_INTEL=y
CONFIG_X86_MCE_AMD=y
+CONFIG_X86_MCE_THRESHOLD=y
# CONFIG_I8K is not set
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
+# CONFIG_X86_CPU_DEBUG is not set
CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
CONFIG_DIRECT_GBPAGES=y
CONFIG_NUMA=y
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_UNEVICTABLE_LRU=y
+CONFIG_HAVE_MLOCK=y
+CONFIG_HAVE_MLOCKED_PAGE_BIT=y
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK=y
CONFIG_X86_RESERVE_LOW_64K=y
CONFIG_X86_PAT=y
CONFIG_EFI=y
CONFIG_SECCOMP=y
+# CONFIG_CC_STACKPROTECTOR is not set
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
+# CONFIG_KEXEC_JUMP is not set
CONFIG_PHYSICAL_START=0x1000000
-# CONFIG_RELOCATABLE is not set
-CONFIG_PHYSICAL_ALIGN=0x200000
+CONFIG_RELOCATABLE=y
+CONFIG_PHYSICAL_ALIGN=0x1000000
CONFIG_HOTPLUG_CPU=y
# CONFIG_COMPAT_VDSO is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
# CONFIG_ACPI_PCI_SLOT is not set
-CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=y
# CONFIG_ACPI_SBS is not set
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
CONFIG_HT_IRQ=y
+# CONFIG_PCI_IOV is not set
CONFIG_ISA_DMA_API=y
CONFIG_K8_NB=y
CONFIG_PCCARD=y
#
# Networking options
#
-CONFIG_COMPAT_NET_DEV_OPS=y
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
+# CONFIG_PHONET is not set
CONFIG_NET_SCHED=y
#
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
+# CONFIG_NET_DROP_MONITOR is not set
CONFIG_HAMRADIO=y
#
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
-# CONFIG_PHONET is not set
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
CONFIG_CFG80211=y
# CONFIG_CFG80211_REG_DEBUG is not set
-CONFIG_NL80211=y
CONFIG_WIRELESS_OLD_REGULATORY=y
CONFIG_WIRELESS_EXT=y
CONFIG_WIRELESS_EXT_SYSFS=y
# CONFIG_TIFM_CORE is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
-# CONFIG_SGI_XP is not set
# CONFIG_HP_ILO is not set
-# CONFIG_SGI_GRU is not set
+# CONFIG_ISL29003 is not set
# CONFIG_C2PORT is not set
#
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_LOWLEVEL_PCMCIA is not set
# CONFIG_SCSI_DH is not set
+# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_ACPI=y
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
+CONFIG_COMPAT_NET_DEV_OPS=y
# CONFIG_IFB is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
CONFIG_NET_VENDOR_3COM=y
# CONFIG_VORTEX is not set
# CONFIG_TYPHOON is not set
+# CONFIG_ETHOC is not set
+# CONFIG_DNET is not set
CONFIG_NET_TULIP=y
# CONFIG_DE2104X is not set
# CONFIG_TULIP is not set
# CONFIG_E1000E is not set
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
+# CONFIG_IGBVF is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
+# CONFIG_ATL1C is not set
# CONFIG_JME is not set
CONFIG_NETDEV_10000=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_IXGBE is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
+# CONFIG_VXGE is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_NIU is not set
# CONFIG_BNX2X is not set
# CONFIG_QLGE is not set
# CONFIG_SFC is not set
+# CONFIG_BE2NET is not set
CONFIG_TR=y
# CONFIG_IBMOL is not set
# CONFIG_3C359 is not set
# CONFIG_LIBERTAS is not set
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_AIRO is not set
-# CONFIG_HERMES is not set
# CONFIG_ATMEL is not set
+# CONFIG_AT76C50X_USB is not set
# CONFIG_AIRO_CS is not set
# CONFIG_PCMCIA_WL3501 is not set
# CONFIG_PRISM54 is not set
# CONFIG_RTL8187 is not set
# CONFIG_ADM8211 is not set
# CONFIG_MAC80211_HWSIM is not set
+# CONFIG_MWL8K is not set
# CONFIG_P54_COMMON is not set
CONFIG_ATH5K=y
# CONFIG_ATH5K_DEBUG is not set
# CONFIG_ATH9K is not set
+# CONFIG_AR9170_USB is not set
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
-# CONFIG_IWLCORE is not set
-# CONFIG_IWLWIFI_LEDS is not set
-# CONFIG_IWLAGN is not set
-# CONFIG_IWL3945 is not set
+# CONFIG_IWLWIFI is not set
# CONFIG_HOSTAP is not set
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_ZD1211RW is not set
# CONFIG_RT2X00 is not set
+# CONFIG_HERMES is not set
#
# Enable WiMAX (Networking options) to see the WiMAX drivers
# CONFIG_TABLET_USB_KBTAB is not set
# CONFIG_TABLET_USB_WACOM is not set
CONFIG_INPUT_TOUCHSCREEN=y
+# CONFIG_TOUCHSCREEN_AD7879_I2C is not set
+# CONFIG_TOUCHSCREEN_AD7879 is not set
# CONFIG_TOUCHSCREEN_FUJITSU is not set
# CONFIG_TOUCHSCREEN_GUNZE is not set
# CONFIG_TOUCHSCREEN_ELO is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
+# CONFIG_HW_RANDOM_TIMERIOMEM is not set
# CONFIG_HW_RANDOM_INTEL is not set
# CONFIG_HW_RANDOM_AMD is not set
CONFIG_NVRAM=y
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCA9539 is not set
-# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_K8TEMP is not set
# CONFIG_SENSORS_ASB100 is not set
+# CONFIG_SENSORS_ATK0110 is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_FSCHER is not set
# CONFIG_SENSORS_FSCPOS is not set
# CONFIG_SENSORS_FSCHMD is not set
+# CONFIG_SENSORS_G760A is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_CORETEMP is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
+# CONFIG_SENSORS_LTC4215 is not set
# CONFIG_SENSORS_LTC4245 is not set
+# CONFIG_SENSORS_LM95241 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
+# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
+# CONFIG_FB_BROADSHEET is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_SND_INDIGO is not set
# CONFIG_SND_INDIGOIO is not set
# CONFIG_SND_INDIGODJ is not set
+# CONFIG_SND_INDIGOIOX is not set
+# CONFIG_SND_INDIGODJX is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
#
# Special HID drivers
#
-CONFIG_HID_COMPAT=y
CONFIG_HID_A4TECH=y
CONFIG_HID_APPLE=y
CONFIG_HID_BELKIN=y
CONFIG_HID_CHERRY=y
CONFIG_HID_CHICONY=y
CONFIG_HID_CYPRESS=y
+# CONFIG_DRAGONRISE_FF is not set
CONFIG_HID_EZKEY=y
+CONFIG_HID_KYE=y
CONFIG_HID_GYRATION=y
+CONFIG_HID_KENSINGTON=y
CONFIG_HID_LOGITECH=y
CONFIG_LOGITECH_FF=y
# CONFIG_LOGIRUMBLEPAD2_FF is not set
# CONFIG_USB_TMC is not set
#
-# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may also be needed;
+# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#
#
-# see USB_STORAGE Help for more information
+# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
-# CONFIG_USB_PHIDGET is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
#
# OTG and related infrastructure
#
+# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_UWB is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
#
# CONFIG_LEDS_ALIX2 is not set
# CONFIG_LEDS_PCA9532 is not set
+# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_PCA955X is not set
+# CONFIG_LEDS_BD2802 is not set
#
# LED Triggers
# CONFIG_LEDS_TRIGGER_HEARTBEAT is not set
# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set
# CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set
+
+#
+# iptables trigger is under Netfilter config (LED target)
+#
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
CONFIG_EDAC=y
# DMA Devices
#
# CONFIG_INTEL_IOATDMA is not set
+# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
# CONFIG_STAGING is not set
CONFIG_X86_PLATFORM_DEVICES=y
#
# CONFIG_EXT2_FS is not set
CONFIG_EXT3_FS=y
+# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
# CONFIG_FUSE_FS is not set
CONFIG_GENERIC_ACL=y
+#
+# Caches
+#
+# CONFIG_FSCACHE is not set
+
#
# CD-ROM/DVD Filesystems
#
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
+# CONFIG_NILFS2_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
-# CONFIG_SUNRPC_REGISTER_V4 is not set
CONFIG_RPCSEC_GSS_KRB5=y
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_DETECT_SOFTLOCKUP is not set
+# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_SCHED_DEBUG is not set
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+CONFIG_STACKTRACE=y
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_INFO is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
+# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_USER_STACKTRACE_SUPPORT=y
+CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_HW_BRANCH_TRACER=y
+CONFIG_HAVE_FTRACE_SYSCALLS=y
+CONFIG_RING_BUFFER=y
+CONFIG_TRACING=y
+CONFIG_TRACING_SUPPORT=y
#
# Tracers
# CONFIG_SYSPROF_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_CONTEXT_SWITCH_TRACER is not set
+# CONFIG_EVENT_TRACER is not set
+# CONFIG_FTRACE_SYSCALLS is not set
# CONFIG_BOOT_TRACER is not set
# CONFIG_TRACE_BRANCH_PROFILING is not set
# CONFIG_POWER_TRACER is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_HW_BRANCH_TRACER is not set
+# CONFIG_KMEMTRACE is not set
+# CONFIG_WORKQUEUE_TRACER is not set
+CONFIG_BLK_DEV_IO_TRACE=y
+# CONFIG_FTRACE_STARTUP_TEST is not set
+# CONFIG_MMIOTRACE is not set
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
-# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
+# CONFIG_DYNAMIC_DEBUG is not set
+# CONFIG_DMA_API_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACK_USAGE=y
-# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
# CONFIG_X86_PTDUMP is not set
CONFIG_DEBUG_RODATA=y
# CONFIG_DEBUG_RODATA_TEST is not set
CONFIG_DEBUG_NX_TEST=m
# CONFIG_IOMMU_DEBUG is not set
-# CONFIG_MMIOTRACE is not set
+CONFIG_HAVE_MMIOTRACE_SUPPORT=y
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=1
# CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX is not set
# CONFIG_SECURITY_SMACK is not set
+# CONFIG_SECURITY_TOMOYO is not set
+# CONFIG_IMA is not set
CONFIG_CRYPTO=y
#
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_PCOMP=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
+CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=y
# CONFIG_CRYPTO_TEST is not set
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_X86_64 is not set
+# CONFIG_CRYPTO_AES_NI_INTEL is not set
# CONFIG_CRYPTO_ANUBIS is not set
CONFIG_CRYPTO_ARC4=y
# CONFIG_CRYPTO_BLOWFISH is not set
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
+# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set
#
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
CONFIG_HAVE_KVM=y
+CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_VIRTUALIZATION=y
# CONFIG_KVM is not set
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_BALLOON is not set
+CONFIG_BINARY_PRINTF=y
#
# Library routines
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
-CONFIG_PLIST=y
+CONFIG_DECOMPRESS_GZIP=y
+CONFIG_DECOMPRESS_BZIP2=y
+CONFIG_DECOMPRESS_LZMA=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
+CONFIG_NLATTR=y
.quad compat_sys_signalfd4
.quad sys_eventfd2
.quad sys_epoll_create1
- .quad sys_dup3 /* 330 */
+ .quad sys_dup3 /* 330 */
.quad sys_pipe2
.quad sys_inotify_init1
.quad compat_sys_preadv
.quad compat_sys_pwritev
+ .quad compat_sys_rt_tgsigqueueinfo /* 335 */
+ .quad sys_perf_counter_open
ia32_syscall_end:
#include <linux/types.h>
#include <linux/stddef.h>
+#include <linux/stringify.h>
#include <asm/asm.h>
/*
const unsigned char *const *find_nop_table(void);
+/* alternative assembly primitive: */
+#define ALTERNATIVE(oldinstr, newinstr, feature) \
+ \
+ "661:\n\t" oldinstr "\n662:\n" \
+ ".section .altinstructions,\"a\"\n" \
+ _ASM_ALIGN "\n" \
+ _ASM_PTR "661b\n" /* label */ \
+ _ASM_PTR "663f\n" /* new instruction */ \
+ " .byte " __stringify(feature) "\n" /* feature bit */ \
+ " .byte 662b-661b\n" /* sourcelen */ \
+ " .byte 664f-663f\n" /* replacementlen */ \
+ ".previous\n" \
+ ".section .altinstr_replacement, \"ax\"\n" \
+ "663:\n\t" newinstr "\n664:\n" /* replacement */ \
+ ".previous"
+
/*
* Alternative instructions for different CPU types or capabilities.
*
* without volatile and memory clobber.
*/
#define alternative(oldinstr, newinstr, feature) \
- asm volatile ("661:\n\t" oldinstr "\n662:\n" \
- ".section .altinstructions,\"a\"\n" \
- _ASM_ALIGN "\n" \
- _ASM_PTR "661b\n" /* label */ \
- _ASM_PTR "663f\n" /* new instruction */ \
- " .byte %c0\n" /* feature bit */ \
- " .byte 662b-661b\n" /* sourcelen */ \
- " .byte 664f-663f\n" /* replacementlen */ \
- ".previous\n" \
- ".section .altinstr_replacement,\"ax\"\n" \
- "663:\n\t" newinstr "\n664:\n" /* replacement */ \
- ".previous" :: "i" (feature) : "memory")
+ asm volatile (ALTERNATIVE(oldinstr, newinstr, feature) : : : "memory")
/*
* Alternative inline assembly with input.
* Best is to use constraints that are fixed size (like (%1) ... "r")
* If you use variable sized constraints like "m" or "g" in the
* replacement make sure to pad to the worst case length.
+ * Leaving an unused argument 0 to keep API compatibility.
*/
#define alternative_input(oldinstr, newinstr, feature, input...) \
- asm volatile ("661:\n\t" oldinstr "\n662:\n" \
- ".section .altinstructions,\"a\"\n" \
- _ASM_ALIGN "\n" \
- _ASM_PTR "661b\n" /* label */ \
- _ASM_PTR "663f\n" /* new instruction */ \
- " .byte %c0\n" /* feature bit */ \
- " .byte 662b-661b\n" /* sourcelen */ \
- " .byte 664f-663f\n" /* replacementlen */ \
- ".previous\n" \
- ".section .altinstr_replacement,\"ax\"\n" \
- "663:\n\t" newinstr "\n664:\n" /* replacement */ \
- ".previous" :: "i" (feature), ##input)
+ asm volatile (ALTERNATIVE(oldinstr, newinstr, feature) \
+ : : "i" (0), ## input)
/* Like alternative_input, but with a single output argument */
#define alternative_io(oldinstr, newinstr, feature, output, input...) \
- asm volatile ("661:\n\t" oldinstr "\n662:\n" \
- ".section .altinstructions,\"a\"\n" \
- _ASM_ALIGN "\n" \
- _ASM_PTR "661b\n" /* label */ \
- _ASM_PTR "663f\n" /* new instruction */ \
- " .byte %c[feat]\n" /* feature bit */ \
- " .byte 662b-661b\n" /* sourcelen */ \
- " .byte 664f-663f\n" /* replacementlen */ \
- ".previous\n" \
- ".section .altinstr_replacement,\"ax\"\n" \
- "663:\n\t" newinstr "\n664:\n" /* replacement */ \
- ".previous" : output : [feat] "i" (feature), ##input)
+ asm volatile (ALTERNATIVE(oldinstr, newinstr, feature) \
+ : output : "i" (0), ## input)
/*
* use this macro(s) if you need more than one output parameter
extern int amd_iommu_init_dma_ops(void);
extern void amd_iommu_detect(void);
extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
+extern void amd_iommu_flush_all_domains(void);
+extern void amd_iommu_flush_all_devices(void);
#else
static inline int amd_iommu_init(void) { return -ENODEV; }
static inline void amd_iommu_detect(void) { }
#define PD_DMA_OPS_MASK (1UL << 0) /* domain used for dma_ops */
#define PD_DEFAULT_MASK (1UL << 1) /* domain is a default dma_ops
domain for an IOMMU */
+extern bool amd_iommu_dump;
+#define DUMP_printk(format, arg...) \
+ do { \
+ if (amd_iommu_dump) \
+ printk(KERN_INFO "AMD IOMMU: " format, ## arg); \
+ } while(0);
+
+/*
+ * Make iterating over all IOMMUs easier
+ */
+#define for_each_iommu(iommu) \
+ list_for_each_entry((iommu), &amd_iommu_list, list)
+#define for_each_iommu_safe(iommu, next) \
+ list_for_each_entry_safe((iommu), (next), &amd_iommu_list, list)
+
+#define APERTURE_RANGE_SHIFT 27 /* 128 MB */
+#define APERTURE_RANGE_SIZE (1ULL << APERTURE_RANGE_SHIFT)
+#define APERTURE_RANGE_PAGES (APERTURE_RANGE_SIZE >> PAGE_SHIFT)
+#define APERTURE_MAX_RANGES 32 /* allows 4GB of DMA address space */
+#define APERTURE_RANGE_INDEX(a) ((a) >> APERTURE_RANGE_SHIFT)
+#define APERTURE_PAGE_INDEX(a) (((a) >> 21) & 0x3fULL)
/*
* This structure contains generic data for IOMMU protection domains
void *priv; /* private data */
};
+/*
+ * For dynamic growth the aperture size is split into ranges of 128MB of
+ * DMA address space each. This struct represents one such range.
+ */
+struct aperture_range {
+
+ /* address allocation bitmap */
+ unsigned long *bitmap;
+
+ /*
+ * Array of PTE pages for the aperture. In this array we save all the
+ * leaf pages of the domain page table used for the aperture. This way
+ * we don't need to walk the page table to find a specific PTE. We can
+ * just calculate its address in constant time.
+ */
+ u64 *pte_pages[64];
+
+ unsigned long offset;
+};
+
/*
* Data container for a dma_ops specific protection domain
*/
unsigned long aperture_size;
/* address we start to search for free addresses */
- unsigned long next_bit;
-
- /* address allocation bitmap */
- unsigned long *bitmap;
+ unsigned long next_address;
- /*
- * Array of PTE pages for the aperture. In this array we save all the
- * leaf pages of the domain page table used for the aperture. This way
- * we don't need to walk the page table to find a specific PTE. We can
- * just calculate its address in constant time.
- */
- u64 **pte_pages;
+ /* address space relevant data */
+ struct aperture_range *aperture[APERTURE_MAX_RANGES];
/* This will be set to true when TLB needs to be flushed */
bool need_flush;
extern void native_apic_icr_write(u32 low, u32 id);
extern u64 native_apic_icr_read(void);
-#define EIM_8BIT_APIC_ID 0
-#define EIM_32BIT_APIC_ID 1
+extern int x2apic_mode;
#ifdef CONFIG_X86_X2APIC
/*
return val;
}
-extern int x2apic, x2apic_phys;
+extern int x2apic_phys;
extern void check_x2apic(void);
extern void enable_x2apic(void);
-extern void enable_IR_x2apic(void);
extern void x2apic_icr_write(u32 low, u32 id);
static inline int x2apic_enabled(void)
{
return 1;
return 0;
}
+
+#define x2apic_supported() (cpu_has_x2apic)
#else
static inline void check_x2apic(void)
{
static inline void enable_x2apic(void)
{
}
-static inline void enable_IR_x2apic(void)
-{
-}
static inline int x2apic_enabled(void)
{
return 0;
}
-#define x2apic 0
-
+#define x2apic_preenabled 0
+#define x2apic_supported() 0
#endif
-extern int get_physical_broadcast(void);
+extern void enable_IR_x2apic(void);
-#ifdef CONFIG_X86_X2APIC
-static inline void ack_x2APIC_irq(void)
-{
- /* Docs say use 0 for future compatibility */
- native_apic_msr_write(APIC_EOI, 0);
-}
-#endif
+extern int get_physical_broadcast(void);
+extern void apic_disable(void);
extern int lapic_get_maxlvt(void);
extern void clear_local_APIC(void);
extern void connect_bsp_APIC(void);
#define local_apic_timer_c2_ok 1
static inline void init_apic_mappings(void) { }
static inline void disable_local_APIC(void) { }
-
+static inline void apic_disable(void) { }
#endif /* !CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_64
{
unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
- if (APIC_XAPIC(ver))
+ if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
return (x >> 24) & 0xFF;
else
return (x >> 24) & 0x0F;
extern void default_setup_apic_routing(void);
#ifdef CONFIG_X86_32
+
+extern struct apic apic_default;
+
/*
* Set up the logical destination ID.
*
# define APIC_INTEGRATED(x) (1)
#endif
#define APIC_XAPIC(x) ((x) >= 0x14)
+#define APIC_EXT_SPACE(x) ((x) & 0x80000000)
#define APIC_TASKPRI 0x80
#define APIC_TPRI_MASK 0xFFu
#define APIC_ARBPRI 0x90
#define APIC_TDR_DIV_32 0x8
#define APIC_TDR_DIV_64 0x9
#define APIC_TDR_DIV_128 0xA
-#define APIC_EILVT0 0x500
+#define APIC_EFEAT 0x400
+#define APIC_ECTRL 0x410
+#define APIC_EILVTn(n) (0x500 + 0x10 * n)
#define APIC_EILVT_NR_AMD_K8 1 /* # of extended interrupts */
#define APIC_EILVT_NR_AMD_10H 4
#define APIC_EILVT_LVTOFF(x) (((x) >> 4) & 0xF)
#define APIC_EILVT_MSG_NMI 0x4
#define APIC_EILVT_MSG_EXT 0x7
#define APIC_EILVT_MASKED (1 << 16)
-#define APIC_EILVT1 0x510
-#define APIC_EILVT2 0x520
-#define APIC_EILVT3 0x530
#define APIC_BASE (fix_to_virt(FIX_APIC_BASE))
#define APIC_BASE_MSR 0x800
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
+/* An 64bit atomic type */
+
+typedef struct {
+ unsigned long long counter;
+} atomic64_t;
+
+#define ATOMIC64_INIT(val) { (val) }
+
+/**
+ * atomic64_read - read atomic64 variable
+ * @v: pointer of type atomic64_t
+ *
+ * Atomically reads the value of @v.
+ * Doesn't imply a read memory barrier.
+ */
+#define __atomic64_read(ptr) ((ptr)->counter)
+
+static inline unsigned long long
+cmpxchg8b(unsigned long long *ptr, unsigned long long old, unsigned long long new)
+{
+ asm volatile(
+
+ LOCK_PREFIX "cmpxchg8b (%[ptr])\n"
+
+ : "=A" (old)
+
+ : [ptr] "D" (ptr),
+ "A" (old),
+ "b" (ll_low(new)),
+ "c" (ll_high(new))
+
+ : "memory");
+
+ return old;
+}
+
+static inline unsigned long long
+atomic64_cmpxchg(atomic64_t *ptr, unsigned long long old_val,
+ unsigned long long new_val)
+{
+ return cmpxchg8b(&ptr->counter, old_val, new_val);
+}
+
+/**
+ * atomic64_xchg - xchg atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ * @new_val: value to assign
+ * @old_val: old value that was there
+ *
+ * Atomically xchgs the value of @ptr to @new_val and returns
+ * the old value.
+ */
+
+static inline unsigned long long
+atomic64_xchg(atomic64_t *ptr, unsigned long long new_val)
+{
+ unsigned long long old_val;
+
+ do {
+ old_val = atomic_read(ptr);
+ } while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
+
+ return old_val;
+}
+
+/**
+ * atomic64_set - set atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ * @new_val: value to assign
+ *
+ * Atomically sets the value of @ptr to @new_val.
+ */
+static inline void atomic64_set(atomic64_t *ptr, unsigned long long new_val)
+{
+ atomic64_xchg(ptr, new_val);
+}
+
+/**
+ * atomic64_read - read atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically reads the value of @ptr and returns it.
+ */
+static inline unsigned long long atomic64_read(atomic64_t *ptr)
+{
+ unsigned long long curr_val;
+
+ do {
+ curr_val = __atomic64_read(ptr);
+ } while (atomic64_cmpxchg(ptr, curr_val, curr_val) != curr_val);
+
+ return curr_val;
+}
+
+/**
+ * atomic64_add_return - add and return
+ * @delta: integer value to add
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically adds @delta to @ptr and returns @delta + *@ptr
+ */
+static inline unsigned long long
+atomic64_add_return(unsigned long long delta, atomic64_t *ptr)
+{
+ unsigned long long old_val, new_val;
+
+ do {
+ old_val = atomic_read(ptr);
+ new_val = old_val + delta;
+
+ } while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
+
+ return new_val;
+}
+
+static inline long atomic64_sub_return(unsigned long long delta, atomic64_t *ptr)
+{
+ return atomic64_add_return(-delta, ptr);
+}
+
+static inline long atomic64_inc_return(atomic64_t *ptr)
+{
+ return atomic64_add_return(1, ptr);
+}
+
+static inline long atomic64_dec_return(atomic64_t *ptr)
+{
+ return atomic64_sub_return(1, ptr);
+}
+
+/**
+ * atomic64_add - add integer to atomic64 variable
+ * @delta: integer value to add
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically adds @delta to @ptr.
+ */
+static inline void atomic64_add(unsigned long long delta, atomic64_t *ptr)
+{
+ atomic64_add_return(delta, ptr);
+}
+
+/**
+ * atomic64_sub - subtract the atomic64 variable
+ * @delta: integer value to subtract
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically subtracts @delta from @ptr.
+ */
+static inline void atomic64_sub(unsigned long long delta, atomic64_t *ptr)
+{
+ atomic64_add(-delta, ptr);
+}
+
+/**
+ * atomic64_sub_and_test - subtract value from variable and test result
+ * @delta: integer value to subtract
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically subtracts @delta from @ptr and returns
+ * true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int
+atomic64_sub_and_test(unsigned long long delta, atomic64_t *ptr)
+{
+ unsigned long long old_val = atomic64_sub_return(delta, ptr);
+
+ return old_val == 0;
+}
+
+/**
+ * atomic64_inc - increment atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically increments @ptr by 1.
+ */
+static inline void atomic64_inc(atomic64_t *ptr)
+{
+ atomic64_add(1, ptr);
+}
+
+/**
+ * atomic64_dec - decrement atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically decrements @ptr by 1.
+ */
+static inline void atomic64_dec(atomic64_t *ptr)
+{
+ atomic64_sub(1, ptr);
+}
+
+/**
+ * atomic64_dec_and_test - decrement and test
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically decrements @ptr by 1 and
+ * returns true if the result is 0, or false for all other
+ * cases.
+ */
+static inline int atomic64_dec_and_test(atomic64_t *ptr)
+{
+ return atomic64_sub_and_test(1, ptr);
+}
+
+/**
+ * atomic64_inc_and_test - increment and test
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically increments @ptr by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int atomic64_inc_and_test(atomic64_t *ptr)
+{
+ return atomic64_sub_and_test(-1, ptr);
+}
+
+/**
+ * atomic64_add_negative - add and test if negative
+ * @delta: integer value to add
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically adds @delta to @ptr and returns true
+ * if the result is negative, or false when
+ * result is greater than or equal to zero.
+ */
+static inline int
+atomic64_add_negative(unsigned long long delta, atomic64_t *ptr)
+{
+ long long old_val = atomic64_add_return(delta, ptr);
+
+ return old_val < 0;
+}
+
#include <asm-generic/atomic.h>
#endif /* _ASM_X86_ATOMIC_32_H */
#ifdef __KERNEL__
+#include <asm/page_types.h>
+
/* Physical address where kernel should be loaded. */
#define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
+ (CONFIG_PHYSICAL_ALIGN - 1)) \
& ~(CONFIG_PHYSICAL_ALIGN - 1))
+/* Minimum kernel alignment, as a power of two */
+#ifdef CONFIG_x86_64
+#define MIN_KERNEL_ALIGN_LG2 PMD_SHIFT
+#else
+#define MIN_KERNEL_ALIGN_LG2 (PAGE_SHIFT+1)
+#endif
+#define MIN_KERNEL_ALIGN (_AC(1, UL) << MIN_KERNEL_ALIGN_LG2)
+
+#if (CONFIG_PHYSICAL_ALIGN & (CONFIG_PHYSICAL_ALIGN-1)) || \
+ (CONFIG_PHYSICAL_ALIGN < (_AC(1, UL) << MIN_KERNEL_ALIGN_LG2))
+#error "Invalid value for CONFIG_PHYSICAL_ALIGN"
+#endif
+
#ifdef CONFIG_KERNEL_BZIP2
#define BOOT_HEAP_SIZE 0x400000
#else /* !CONFIG_KERNEL_BZIP2 */
__u32 ramdisk_size;
__u32 bootsect_kludge;
__u16 heap_end_ptr;
- __u16 _pad1;
+ __u8 ext_loader_ver;
+ __u8 ext_loader_type;
__u32 cmd_line_ptr;
__u32 initrd_addr_max;
__u32 kernel_alignment;
CPU_VALUE_BIT, /* value */
};
-#define CPU_FILE_VALUE (1 << CPU_VALUE_BIT)
-
-/*
- * DisplayFamily_DisplayModel Processor Families/Processor Number Series
- * -------------------------- ------------------------------------------
- * 05_01, 05_02, 05_04 Pentium, Pentium with MMX
- *
- * 06_01 Pentium Pro
- * 06_03, 06_05 Pentium II Xeon, Pentium II
- * 06_07, 06_08, 06_0A, 06_0B Pentium III Xeon, Pentum III
- *
- * 06_09, 060D Pentium M
- *
- * 06_0E Core Duo, Core Solo
- *
- * 06_0F Xeon 3000, 3200, 5100, 5300, 7300 series,
- * Core 2 Quad, Core 2 Extreme, Core 2 Duo,
- * Pentium dual-core
- * 06_17 Xeon 5200, 5400 series, Core 2 Quad Q9650
- *
- * 06_1C Atom
- *
- * 0F_00, 0F_01, 0F_02 Xeon, Xeon MP, Pentium 4
- * 0F_03, 0F_04 Xeon, Xeon MP, Pentium 4, Pentium D
- *
- * 0F_06 Xeon 7100, 5000 Series, Xeon MP,
- * Pentium 4, Pentium D
- */
-
-/* Register processors bits */
-enum cpu_processor_bit {
- CPU_NONE,
-/* Intel */
- CPU_INTEL_PENTIUM_BIT,
- CPU_INTEL_P6_BIT,
- CPU_INTEL_PENTIUM_M_BIT,
- CPU_INTEL_CORE_BIT,
- CPU_INTEL_CORE2_BIT,
- CPU_INTEL_ATOM_BIT,
- CPU_INTEL_XEON_P4_BIT,
- CPU_INTEL_XEON_MP_BIT,
-/* AMD */
- CPU_AMD_K6_BIT,
- CPU_AMD_K7_BIT,
- CPU_AMD_K8_BIT,
- CPU_AMD_0F_BIT,
- CPU_AMD_10_BIT,
- CPU_AMD_11_BIT,
-};
-
-#define CPU_INTEL_PENTIUM (1 << CPU_INTEL_PENTIUM_BIT)
-#define CPU_INTEL_P6 (1 << CPU_INTEL_P6_BIT)
-#define CPU_INTEL_PENTIUM_M (1 << CPU_INTEL_PENTIUM_M_BIT)
-#define CPU_INTEL_CORE (1 << CPU_INTEL_CORE_BIT)
-#define CPU_INTEL_CORE2 (1 << CPU_INTEL_CORE2_BIT)
-#define CPU_INTEL_ATOM (1 << CPU_INTEL_ATOM_BIT)
-#define CPU_INTEL_XEON_P4 (1 << CPU_INTEL_XEON_P4_BIT)
-#define CPU_INTEL_XEON_MP (1 << CPU_INTEL_XEON_MP_BIT)
-
-#define CPU_INTEL_PX (CPU_INTEL_P6 | CPU_INTEL_PENTIUM_M)
-#define CPU_INTEL_COREX (CPU_INTEL_CORE | CPU_INTEL_CORE2)
-#define CPU_INTEL_XEON (CPU_INTEL_XEON_P4 | CPU_INTEL_XEON_MP)
-#define CPU_CO_AT (CPU_INTEL_CORE | CPU_INTEL_ATOM)
-#define CPU_C2_AT (CPU_INTEL_CORE2 | CPU_INTEL_ATOM)
-#define CPU_CX_AT (CPU_INTEL_COREX | CPU_INTEL_ATOM)
-#define CPU_CX_XE (CPU_INTEL_COREX | CPU_INTEL_XEON)
-#define CPU_P6_XE (CPU_INTEL_P6 | CPU_INTEL_XEON)
-#define CPU_PM_CO_AT (CPU_INTEL_PENTIUM_M | CPU_CO_AT)
-#define CPU_C2_AT_XE (CPU_C2_AT | CPU_INTEL_XEON)
-#define CPU_CX_AT_XE (CPU_CX_AT | CPU_INTEL_XEON)
-#define CPU_P6_CX_AT (CPU_INTEL_P6 | CPU_CX_AT)
-#define CPU_P6_CX_XE (CPU_P6_XE | CPU_INTEL_COREX)
-#define CPU_P6_CX_AT_XE (CPU_INTEL_P6 | CPU_CX_AT_XE)
-#define CPU_PM_CX_AT_XE (CPU_INTEL_PENTIUM_M | CPU_CX_AT_XE)
-#define CPU_PM_CX_AT (CPU_INTEL_PENTIUM_M | CPU_CX_AT)
-#define CPU_PM_CX_XE (CPU_INTEL_PENTIUM_M | CPU_CX_XE)
-#define CPU_PX_CX_AT (CPU_INTEL_PX | CPU_CX_AT)
-#define CPU_PX_CX_AT_XE (CPU_INTEL_PX | CPU_CX_AT_XE)
-
-/* Select all supported Intel CPUs */
-#define CPU_INTEL_ALL (CPU_INTEL_PENTIUM | CPU_PX_CX_AT_XE)
-
-#define CPU_AMD_K6 (1 << CPU_AMD_K6_BIT)
-#define CPU_AMD_K7 (1 << CPU_AMD_K7_BIT)
-#define CPU_AMD_K8 (1 << CPU_AMD_K8_BIT)
-#define CPU_AMD_0F (1 << CPU_AMD_0F_BIT)
-#define CPU_AMD_10 (1 << CPU_AMD_10_BIT)
-#define CPU_AMD_11 (1 << CPU_AMD_11_BIT)
-
-#define CPU_K10_PLUS (CPU_AMD_10 | CPU_AMD_11)
-#define CPU_K0F_PLUS (CPU_AMD_0F | CPU_K10_PLUS)
-#define CPU_K8_PLUS (CPU_AMD_K8 | CPU_K0F_PLUS)
-#define CPU_K7_PLUS (CPU_AMD_K7 | CPU_K8_PLUS)
-
-/* Select all supported AMD CPUs */
-#define CPU_AMD_ALL (CPU_AMD_K6 | CPU_K7_PLUS)
-
-/* Select all supported CPUs */
-#define CPU_ALL (CPU_INTEL_ALL | CPU_AMD_ALL)
+#define CPU_FILE_VALUE (1 << CPU_VALUE_BIT)
#define MAX_CPU_FILES 512
unsigned min; /* Register range min */
unsigned max; /* Register range max */
unsigned flag; /* Supported flags */
- unsigned model; /* Supported models */
};
#endif /* _ASM_X86_CPU_DEBUG_H */
#define X86_FEATURE_TSC (0*32+ 4) /* Time Stamp Counter */
#define X86_FEATURE_MSR (0*32+ 5) /* Model-Specific Registers */
#define X86_FEATURE_PAE (0*32+ 6) /* Physical Address Extensions */
-#define X86_FEATURE_MCE (0*32+ 7) /* Machine Check Architecture */
+#define X86_FEATURE_MCE (0*32+ 7) /* Machine Check Exception */
#define X86_FEATURE_CX8 (0*32+ 8) /* CMPXCHG8 instruction */
#define X86_FEATURE_APIC (0*32+ 9) /* Onboard APIC */
#define X86_FEATURE_SEP (0*32+11) /* SYSENTER/SYSEXIT */
#define X86_FEATURE_TSC_RELIABLE (3*32+23) /* TSC is known to be reliable */
#define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */
#define X86_FEATURE_CLFLUSH_MONITOR (3*32+25) /* "" clflush reqd with monitor */
+#define X86_FEATURE_EXTD_APICID (3*32+26) /* has extended APICID (8 bits) */
/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
#define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
#define clear_cpu_cap(c, bit) clear_bit(bit, (unsigned long *)((c)->x86_capability))
#define setup_clear_cpu_cap(bit) do { \
clear_cpu_cap(&boot_cpu_data, bit); \
- set_bit(bit, (unsigned long *)cleared_cpu_caps); \
+ set_bit(bit, (unsigned long *)cpu_caps_cleared); \
} while (0)
#define setup_force_cpu_cap(bit) do { \
set_cpu_cap(&boot_cpu_data, bit); \
- clear_bit(bit, (unsigned long *)cleared_cpu_caps); \
+ set_bit(bit, (unsigned long *)cpu_caps_set); \
} while (0)
#define cpu_has_fpu boot_cpu_has(X86_FEATURE_FPU)
* - buffer allocation (memory accounting)
*
*
- * Copyright (C) 2007-2008 Intel Corporation.
- * Markus Metzger <markus.t.metzger@intel.com>, 2007-2008
+ * Copyright (C) 2007-2009 Intel Corporation.
+ * Markus Metzger <markus.t.metzger@intel.com>, 2007-2009
*/
#ifndef _ASM_X86_DS_H
* The interrupt threshold is independent from the overflow callback
* to allow users to use their own overflow interrupt handling mechanism.
*
- * task: the task to request recording for;
- * NULL for per-cpu recording on the current cpu
+ * The function might sleep.
+ *
+ * task: the task to request recording for
+ * cpu: the cpu to request recording for
* base: the base pointer for the (non-pageable) buffer;
* size: the size of the provided buffer in bytes
* ovfl: pointer to a function to be called on buffer overflow;
* -1 if no interrupt threshold is requested.
* flags: a bit-mask of the above flags
*/
-extern struct bts_tracer *ds_request_bts(struct task_struct *task,
- void *base, size_t size,
- bts_ovfl_callback_t ovfl,
- size_t th, unsigned int flags);
-extern struct pebs_tracer *ds_request_pebs(struct task_struct *task,
- void *base, size_t size,
- pebs_ovfl_callback_t ovfl,
- size_t th, unsigned int flags);
+extern struct bts_tracer *ds_request_bts_task(struct task_struct *task,
+ void *base, size_t size,
+ bts_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags);
+extern struct bts_tracer *ds_request_bts_cpu(int cpu, void *base, size_t size,
+ bts_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags);
+extern struct pebs_tracer *ds_request_pebs_task(struct task_struct *task,
+ void *base, size_t size,
+ pebs_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags);
+extern struct pebs_tracer *ds_request_pebs_cpu(int cpu,
+ void *base, size_t size,
+ pebs_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags);
/*
* Release BTS or PEBS resources
* Suspend and resume BTS or PEBS tracing
*
+ * Must be called with irq's enabled.
+ *
* tracer: the tracer handle returned from ds_request_~()
*/
extern void ds_release_bts(struct bts_tracer *tracer);
extern void ds_suspend_pebs(struct pebs_tracer *tracer);
extern void ds_resume_pebs(struct pebs_tracer *tracer);
+/*
+ * Release BTS or PEBS resources
+ * Suspend and resume BTS or PEBS tracing
+ *
+ * Cpu tracers must call this on the traced cpu.
+ * Task tracers must call ds_release_~_noirq() for themselves.
+ *
+ * May be called with irq's disabled.
+ *
+ * Returns 0 if successful;
+ * -EPERM if the cpu tracer does not trace the current cpu.
+ * -EPERM if the task tracer does not trace itself.
+ *
+ * tracer: the tracer handle returned from ds_request_~()
+ */
+extern int ds_release_bts_noirq(struct bts_tracer *tracer);
+extern int ds_suspend_bts_noirq(struct bts_tracer *tracer);
+extern int ds_resume_bts_noirq(struct bts_tracer *tracer);
+extern int ds_release_pebs_noirq(struct pebs_tracer *tracer);
+extern int ds_suspend_pebs_noirq(struct pebs_tracer *tracer);
+extern int ds_resume_pebs_noirq(struct pebs_tracer *tracer);
+
/*
* The raw DS buffer state as it is used for BTS and PEBS recording.
} lbr;
/* BTS_TASK_ARRIVES or BTS_TASK_DEPARTS */
struct {
- __u64 jiffies;
+ __u64 clock;
pid_t pid;
- } timestamp;
+ } event;
} variant;
};
struct pebs_trace {
struct ds_trace ds;
- /* the PEBS reset value */
- unsigned long long reset_value;
+ /* the number of valid counters in the below array */
+ unsigned int counters;
+
+#define MAX_PEBS_COUNTERS 4
+ /* the counter reset value */
+ unsigned long long counter_reset[MAX_PEBS_COUNTERS];
};
* Returns 0 on success; -Eerrno on error
*
* tracer: the tracer handle returned from ds_request_pebs()
+ * counter: the index of the counter
* value: the new counter reset value
*/
-extern int ds_set_pebs_reset(struct pebs_tracer *tracer, u64 value);
+extern int ds_set_pebs_reset(struct pebs_tracer *tracer,
+ unsigned int counter, u64 value);
/*
* Initialization
*/
extern void ds_switch_to(struct task_struct *prev, struct task_struct *next);
-/*
- * Task clone/init and cleanup work
- */
-extern void ds_copy_thread(struct task_struct *tsk, struct task_struct *father);
-extern void ds_exit_thread(struct task_struct *tsk);
-
#else /* CONFIG_X86_DS */
struct cpuinfo_x86;
static inline void __cpuinit ds_init_intel(struct cpuinfo_x86 *ignored) {}
static inline void ds_switch_to(struct task_struct *prev,
struct task_struct *next) {}
-static inline void ds_copy_thread(struct task_struct *tsk,
- struct task_struct *father) {}
-static inline void ds_exit_thread(struct task_struct *tsk) {}
#endif /* CONFIG_X86_DS */
#endif /* _ASM_X86_DS_H */
BUILD_INTERRUPT(spurious_interrupt,SPURIOUS_APIC_VECTOR)
#ifdef CONFIG_PERF_COUNTERS
-BUILD_INTERRUPT(perf_counter_interrupt, LOCAL_PERF_VECTOR)
+BUILD_INTERRUPT(perf_pending_interrupt, LOCAL_PENDING_VECTOR)
#endif
#ifdef CONFIG_X86_MCE_P4THERMAL
unsigned int irq_spurious_count;
#endif
unsigned int generic_irqs; /* arch dependent */
+ unsigned int apic_perf_irqs;
+ unsigned int apic_pending_irqs;
#ifdef CONFIG_SMP
unsigned int irq_resched_count;
unsigned int irq_call_count;
extern void apic_timer_interrupt(void);
extern void generic_interrupt(void);
extern void error_interrupt(void);
+extern void perf_pending_interrupt(void);
+
extern void spurious_interrupt(void);
extern void thermal_interrupt(void);
extern void reschedule_interrupt(void);
extern void init_VISWS_APIC_irqs(void);
extern void setup_IO_APIC(void);
extern void disable_IO_APIC(void);
-extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
+
+struct io_apic_irq_attr {
+ int ioapic;
+ int ioapic_pin;
+ int trigger;
+ int polarity;
+};
+
+static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
+ int ioapic, int ioapic_pin,
+ int trigger, int polarity)
+{
+ irq_attr->ioapic = ioapic;
+ irq_attr->ioapic_pin = ioapic_pin;
+ irq_attr->trigger = trigger;
+ irq_attr->polarity = polarity;
+}
+
+extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin,
+ struct io_apic_irq_attr *irq_attr);
extern void setup_ioapic_dest(void);
extern void enable_IO_APIC(void);
/* SMP */
extern void smp_apic_timer_interrupt(struct pt_regs *);
extern void smp_spurious_interrupt(struct pt_regs *);
+extern void smp_generic_interrupt(struct pt_regs *);
extern void smp_error_interrupt(struct pt_regs *);
+#ifdef CONFIG_X86_IO_APIC
+extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
+#endif
#ifdef CONFIG_SMP
extern void smp_reschedule_interrupt(struct pt_regs *);
extern void smp_call_function_interrupt(struct pt_regs *);
".previous\n"
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err)
-#if 0 /* See comment in __save_init_fpu() below. */
+#if 0 /* See comment in fxsave() below. */
: [fx] "r" (fx), "m" (*fx), "0" (0));
#else
: [fx] "cdaSDb" (fx), "m" (*fx), "0" (0));
return err;
}
-static inline int restore_fpu_checking(struct task_struct *tsk)
-{
- if (task_thread_info(tsk)->status & TS_XSAVE)
- return xrstor_checking(&tsk->thread.xstate->xsave);
- else
- return fxrstor_checking(&tsk->thread.xstate->fxsave);
-}
-
/* AMD CPUs don't save/restore FDP/FIP/FOP unless an exception
is pending. Clear the x87 state here by setting it to fixed
values. The kernel data segment can be sometimes 0 and sometimes
".previous\n"
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err), "=m" (*fx)
-#if 0 /* See comment in __fxsave_clear() below. */
+#if 0 /* See comment in fxsave() below. */
: [fx] "r" (fx), "0" (0));
#else
: [fx] "cdaSDb" (fx), "0" (0));
asm volatile("fnclex ; fwait");
}
-static inline void restore_fpu(struct task_struct *tsk)
+/* perform fxrstor iff the processor has extended states, otherwise frstor */
+static inline int fxrstor_checking(struct i387_fxsave_struct *fx)
{
- if (task_thread_info(tsk)->status & TS_XSAVE) {
- xrstor_checking(&tsk->thread.xstate->xsave);
- return;
- }
/*
* The "nop" is needed to make the instructions the same
* length.
"nop ; frstor %1",
"fxrstor %1",
X86_FEATURE_FXSR,
- "m" (tsk->thread.xstate->fxsave));
+ "m" (*fx));
+
+ return 0;
}
/* We need a safe address that is cheap to find and that is already
#endif /* CONFIG_X86_64 */
+static inline int restore_fpu_checking(struct task_struct *tsk)
+{
+ if (task_thread_info(tsk)->status & TS_XSAVE)
+ return xrstor_checking(&tsk->thread.xstate->xsave);
+ else
+ return fxrstor_checking(&tsk->thread.xstate->fxsave);
+}
+
/*
* Signal frame handlers...
*/
/*
* Some instructions like VIA's padlock instructions generate a spurious
* DNA fault but don't modify SSE registers. And these instructions
- * get used from interrupt context aswell. To prevent these kernel instructions
- * in interrupt context interact wrongly with other user/kernel fpu usage, we
+ * get used from interrupt context as well. To prevent these kernel instructions
+ * in interrupt context interacting wrongly with other user/kernel fpu usage, we
* should use them only in the context of irq_ts_save/restore()
*/
static inline int irq_ts_save(void)
{
/*
- * If we are in process context, we are ok to take a spurious DNA fault.
- * Otherwise, doing clts() in process context require pre-emption to
- * be disabled or some heavy lifting like kernel_fpu_begin()
+ * If in process context and not atomic, we can take a spurious DNA fault.
+ * Otherwise, doing clts() in process context requires disabling preemption
+ * or some heavy lifting like kernel_fpu_begin()
*/
- if (!in_interrupt())
+ if (!in_atomic())
return 0;
if (read_cr0() & X86_CR0_TS) {
extern void mask_8259A(void);
extern void unmask_8259A(void);
-#ifdef CONFIG_X86_32
-extern void init_ISA_irqs(void);
-#endif
-
#endif /* _ASM_X86_I8259_H */
+++ /dev/null
-#ifndef _ASM_X86_INTEL_ARCH_PERFMON_H
-#define _ASM_X86_INTEL_ARCH_PERFMON_H
-
-#define MSR_ARCH_PERFMON_PERFCTR0 0xc1
-#define MSR_ARCH_PERFMON_PERFCTR1 0xc2
-
-#define MSR_ARCH_PERFMON_EVENTSEL0 0x186
-#define MSR_ARCH_PERFMON_EVENTSEL1 0x187
-
-#define ARCH_PERFMON_EVENTSEL0_ENABLE (1 << 22)
-#define ARCH_PERFMON_EVENTSEL_INT (1 << 20)
-#define ARCH_PERFMON_EVENTSEL_OS (1 << 17)
-#define ARCH_PERFMON_EVENTSEL_USR (1 << 16)
-
-#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_SEL (0x3c)
-#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_UMASK (0x00 << 8)
-#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX (0)
-#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_PRESENT \
- (1 << (ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX))
-
-union cpuid10_eax {
- struct {
- unsigned int version_id:8;
- unsigned int num_counters:8;
- unsigned int bit_width:8;
- unsigned int mask_length:8;
- } split;
- unsigned int full;
-};
-
-#endif /* _ASM_X86_INTEL_ARCH_PERFMON_H */
extern int io_apic_get_unique_id(int ioapic, int apic_id);
extern int io_apic_get_version(int ioapic);
extern int io_apic_get_redir_entries(int ioapic);
-extern int io_apic_set_pci_routing(int ioapic, int pin, int irq,
- int edge_level, int active_high_low);
#endif /* CONFIG_ACPI */
+struct io_apic_irq_attr;
+extern int io_apic_set_pci_routing(struct device *dev, int irq,
+ struct io_apic_irq_attr *irq_attr);
extern int (*ioapic_renumber_irq)(int ioapic, int irq);
extern void ioapic_init_mappings(void);
-#ifdef CONFIG_X86_64
extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
extern void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries);
extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
-extern void reinit_intr_remapped_IO_APIC(int intr_remapping,
- struct IO_APIC_route_entry **ioapic_entries);
-#endif
extern void probe_nr_irqs_gsi(void);
+#ifndef _ASM_X86_IOMAP_H
+#define _ASM_X86_IOMAP_H
+
/*
* Copyright © 2008 Ingo Molnar
*
void
iounmap_atomic(void *kvaddr, enum km_type type);
+
+#endif /* _ASM_X86_IOMAP_H */
#ifndef _ASM_X86_IRQ_REMAPPING_H
#define _ASM_X86_IRQ_REMAPPING_H
-#define IRTE_DEST(dest) ((x2apic) ? dest : dest << 8)
+#define IRTE_DEST(dest) ((x2apic_mode) ? dest : dest << 8)
#endif /* _ASM_X86_IRQ_REMAPPING_H */
#ifdef CONFIG_X86_32
# define SYSCALL_VECTOR 0x80
+# define IA32_SYSCALL_VECTOR 0x80
#else
# define IA32_SYSCALL_VECTOR 0x80
#endif
#define LOCAL_TIMER_VECTOR 0xef
/*
- * Performance monitoring interrupt vector:
+ * Generic system vector for platform specific use
*/
-#define LOCAL_PERF_VECTOR 0xee
+#define GENERIC_INTERRUPT_VECTOR 0xed
/*
- * Generic system vector for platform specific use
+ * Performance monitoring pending work vector:
*/
-#define GENERIC_INTERRUPT_VECTOR 0xed
+#define LOCAL_PENDING_VECTOR 0xec
/*
* First APIC vector available to drivers: (vectors 0x30-0xee) we
extern void k8_flush_garts(void);
extern int k8_scan_nodes(unsigned long start, unsigned long end);
+#ifdef CONFIG_K8_NB
+static inline struct pci_dev *node_to_k8_nb_misc(int node)
+{
+ return (node < num_k8_northbridges) ? k8_northbridges[node] : NULL;
+}
+#else
+static inline struct pci_dev *node_to_k8_nb_misc(int node)
+{
+ return NULL;
+}
+#endif
+
+
#endif /* _ASM_X86_K8_H */
struct device;
+enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
+
struct microcode_ops {
- int (*request_microcode_user) (int cpu, const void __user *buf, size_t size);
- int (*request_microcode_fw) (int cpu, struct device *device);
+ enum ucode_state (*request_microcode_user) (int cpu,
+ const void __user *buf, size_t size);
- void (*apply_microcode) (int cpu);
+ enum ucode_state (*request_microcode_fw) (int cpu,
+ struct device *device);
- int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
void (*microcode_fini_cpu) (int cpu);
+
+ /*
+ * The generic 'microcode_core' part guarantees that
+ * the callbacks below run on a target cpu when they
+ * are being called.
+ * See also the "Synchronization" section in microcode_core.c.
+ */
+ int (*apply_microcode) (int cpu);
+ int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
};
struct ucode_cpu_info {
- struct cpu_signature cpu_sig;
- int valid;
- void *mc;
+ struct cpu_signature cpu_sig;
+ int valid;
+ void *mc;
};
extern struct ucode_cpu_info ucode_cpu_info[];
#ifdef CONFIG_X86_MPPARSE
extern void find_smp_config(void);
extern void early_reserve_e820_mpc_new(void);
+extern int enable_update_mptable;
#else
static inline void find_smp_config(void) { }
static inline void early_reserve_e820_mpc_new(void) { }
+#define enable_update_mptable 0
#endif
void __cpuinit generic_processor_info(int apicid, int version);
extern void mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
u32 gsi);
extern void mp_config_acpi_legacy_irqs(void);
-extern int mp_register_gsi(u32 gsi, int edge_level, int active_high_low);
+struct device;
+extern int mp_register_gsi(struct device *dev, u32 gsi, int edge_level,
+ int active_high_low);
extern int acpi_probe_gsi(void);
#ifdef CONFIG_X86_IO_APIC
-extern int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
- u32 gsi, int triggering, int polarity);
extern int mp_find_ioapic(int gsi);
extern int mp_find_ioapic_pin(int ioapic, int gsi);
-#else
-static inline int
-mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
- u32 gsi, int triggering, int polarity)
-{
- return 0;
-}
#endif
#else /* !CONFIG_ACPI: */
static inline int acpi_probe_gsi(void)
#define MSR_K8_TOP_MEM1 0xc001001a
#define MSR_K8_TOP_MEM2 0xc001001d
#define MSR_K8_SYSCFG 0xc0010010
-#define MSR_K8_HWCR 0xc0010015
#define MSR_K8_INT_PENDING_MSG 0xc0010055
/* C1E active bits in int pending message */
#define K8_INTP_C1E_ACTIVE_MASK 0x18000000
* but since they are power of two we could use a
* cheaper way --cvg
*/
- return nmi_watchdog & 0x3;
+ return nmi_watchdog & (NMI_LOCAL_APIC | NMI_IO_APIC);
}
#endif
extern void numa_init_array(void);
extern int numa_off;
-extern void srat_reserve_add_area(int nodeid);
-extern int hotadd_percent;
-
extern s16 apicid_to_node[MAX_LOCAL_APIC];
extern unsigned long numa_free_all_bootmem(void);
unsigned long end);
#ifdef CONFIG_NUMA
+/*
+ * Too small node sizes may confuse the VM badly. Usually they
+ * result from BIOS bugs. So dont recognize nodes as standalone
+ * NUMA entities that have less than this amount of RAM listed:
+ */
+#define NODE_MIN_SIZE (4*1024*1024)
+
extern void __init init_cpu_to_node(void);
extern void __cpuinit numa_set_node(int cpu, int node);
extern void __cpuinit numa_clear_node(int cpu);
extern int sysctl_legacy_va_layout;
extern void find_low_pfn_range(void);
-extern unsigned long init_memory_mapping(unsigned long start,
- unsigned long end);
-extern void initmem_init(unsigned long, unsigned long);
-extern void free_initmem(void);
extern void setup_bootmem_allocator(void);
#endif /* !__ASSEMBLY__ */
*/
#define __PAGE_OFFSET _AC(0xffff880000000000, UL)
-#define __PHYSICAL_START CONFIG_PHYSICAL_START
-#define __KERNEL_ALIGN 0x200000
-
-/*
- * Make sure kernel is aligned to 2MB address. Catching it at compile
- * time is better. Change your config file and compile the kernel
- * for a 2MB aligned address (CONFIG_PHYSICAL_START)
- */
-#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
-#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
-#endif
+#define __PHYSICAL_START ((CONFIG_PHYSICAL_START + \
+ (CONFIG_PHYSICAL_ALIGN - 1)) & \
+ ~(CONFIG_PHYSICAL_ALIGN - 1))
#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
-/* See Documentation/x86_64/mm.txt for a description of the memory map. */
+/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
#define __PHYSICAL_MASK_SHIFT 46
#define __VIRTUAL_MASK_SHIFT 48
#define vmemmap ((struct page *)VMEMMAP_START)
-extern unsigned long init_memory_mapping(unsigned long start,
- unsigned long end);
-
-extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
-extern void free_initmem(void);
-
extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
extern unsigned long max_low_pfn_mapped;
extern unsigned long max_pfn_mapped;
+extern unsigned long init_memory_mapping(unsigned long start,
+ unsigned long end);
+
+extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
+extern void free_initmem(void);
+
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_PAGE_DEFS_H */
struct tss_struct;
struct mm_struct;
struct desc_struct;
+struct task_struct;
/*
* Wrapper type for pointers to code which uses the non-standard
void (*swapgs)(void);
- struct pv_lazy_ops lazy_mode;
+ void (*start_context_switch)(struct task_struct *prev);
+ void (*end_context_switch)(struct task_struct *next);
};
struct pv_irq_ops {
};
enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
-void paravirt_enter_lazy_cpu(void);
-void paravirt_leave_lazy_cpu(void);
+void paravirt_start_context_switch(struct task_struct *prev);
+void paravirt_end_context_switch(struct task_struct *next);
+
void paravirt_enter_lazy_mmu(void);
void paravirt_leave_lazy_mmu(void);
-void paravirt_leave_lazy(enum paravirt_lazy_mode mode);
-#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
-static inline void arch_enter_lazy_cpu_mode(void)
+#define __HAVE_ARCH_START_CONTEXT_SWITCH
+static inline void arch_start_context_switch(struct task_struct *prev)
{
- PVOP_VCALL0(pv_cpu_ops.lazy_mode.enter);
+ PVOP_VCALL1(pv_cpu_ops.start_context_switch, prev);
}
-static inline void arch_leave_lazy_cpu_mode(void)
+static inline void arch_end_context_switch(struct task_struct *next)
{
- PVOP_VCALL0(pv_cpu_ops.lazy_mode.leave);
+ PVOP_VCALL1(pv_cpu_ops.end_context_switch, next);
}
-void arch_flush_lazy_cpu_mode(void);
-
#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
static inline void arch_enter_lazy_mmu_mode(void)
{
--- /dev/null
+#ifndef _ASM_X86_PERF_COUNTER_H
+#define _ASM_X86_PERF_COUNTER_H
+
+/*
+ * Performance counter hw details:
+ */
+
+#define X86_PMC_MAX_GENERIC 8
+#define X86_PMC_MAX_FIXED 3
+
+#define X86_PMC_IDX_GENERIC 0
+#define X86_PMC_IDX_FIXED 32
+#define X86_PMC_IDX_MAX 64
+
+#define MSR_ARCH_PERFMON_PERFCTR0 0xc1
+#define MSR_ARCH_PERFMON_PERFCTR1 0xc2
+
+#define MSR_ARCH_PERFMON_EVENTSEL0 0x186
+#define MSR_ARCH_PERFMON_EVENTSEL1 0x187
+
+#define ARCH_PERFMON_EVENTSEL0_ENABLE (1 << 22)
+#define ARCH_PERFMON_EVENTSEL_INT (1 << 20)
+#define ARCH_PERFMON_EVENTSEL_OS (1 << 17)
+#define ARCH_PERFMON_EVENTSEL_USR (1 << 16)
+
+/*
+ * Includes eventsel and unit mask as well:
+ */
+#define ARCH_PERFMON_EVENT_MASK 0xffff
+
+#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_SEL 0x3c
+#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_UMASK (0x00 << 8)
+#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX 0
+#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_PRESENT \
+ (1 << (ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX))
+
+#define ARCH_PERFMON_BRANCH_MISSES_RETIRED 6
+
+/*
+ * Intel "Architectural Performance Monitoring" CPUID
+ * detection/enumeration details:
+ */
+union cpuid10_eax {
+ struct {
+ unsigned int version_id:8;
+ unsigned int num_counters:8;
+ unsigned int bit_width:8;
+ unsigned int mask_length:8;
+ } split;
+ unsigned int full;
+};
+
+union cpuid10_edx {
+ struct {
+ unsigned int num_counters_fixed:4;
+ unsigned int reserved:28;
+ } split;
+ unsigned int full;
+};
+
+
+/*
+ * Fixed-purpose performance counters:
+ */
+
+/*
+ * All 3 fixed-mode PMCs are configured via this single MSR:
+ */
+#define MSR_ARCH_PERFMON_FIXED_CTR_CTRL 0x38d
+
+/*
+ * The counts are available in three separate MSRs:
+ */
+
+/* Instr_Retired.Any: */
+#define MSR_ARCH_PERFMON_FIXED_CTR0 0x309
+#define X86_PMC_IDX_FIXED_INSTRUCTIONS (X86_PMC_IDX_FIXED + 0)
+
+/* CPU_CLK_Unhalted.Core: */
+#define MSR_ARCH_PERFMON_FIXED_CTR1 0x30a
+#define X86_PMC_IDX_FIXED_CPU_CYCLES (X86_PMC_IDX_FIXED + 1)
+
+/* CPU_CLK_Unhalted.Ref: */
+#define MSR_ARCH_PERFMON_FIXED_CTR2 0x30b
+#define X86_PMC_IDX_FIXED_BUS_CYCLES (X86_PMC_IDX_FIXED + 2)
+
+extern void set_perf_counter_pending(void);
+
+#define clear_perf_counter_pending() do { } while (0)
+#define test_perf_counter_pending() (0)
+
+#ifdef CONFIG_PERF_COUNTERS
+extern void init_hw_perf_counters(void);
+extern void perf_counters_lapic_init(void);
+#else
+static inline void init_hw_perf_counters(void) { }
+static inline void perf_counters_lapic_init(void) { }
+#endif
+
+#endif /* _ASM_X86_PERF_COUNTER_H */
#define pte_val(x) native_pte_val(x)
#define __pte(x) native_make_pte(x)
+#define arch_end_context_switch(prev) do {} while(0)
+
#endif /* CONFIG_PARAVIRT */
/*
#ifndef __ASSEMBLY__
+extern int direct_gbpages;
+
/* local pte updates need not use xchg for locking */
static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
{
extern void paging_init(void);
-#endif /* !__ASSEMBLY__ */
-
-#ifndef __ASSEMBLY__
-
#define pte_ERROR(e) \
printk("%s:%d: bad pte %p(%016lx).\n", \
__FILE__, __LINE__, &(e), pte_val(e))
#define update_mmu_cache(vma, address, pte) do { } while (0)
-extern int direct_gbpages;
-
/* Encode and de-code a swap entry */
#if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE
#define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1)
#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE - 1))
-
+/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
#define MAXMEM _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL)
-#define VMALLOC_START _AC(0xffffc20000000000, UL)
-#define VMALLOC_END _AC(0xffffe1ffffffffff, UL)
-#define VMEMMAP_START _AC(0xffffe20000000000, UL)
+#define VMALLOC_START _AC(0xffffc90000000000, UL)
+#define VMALLOC_END _AC(0xffffe8ffffffffff, UL)
+#define VMEMMAP_START _AC(0xffffea0000000000, UL)
#define MODULES_VADDR _AC(0xffffffffa0000000, UL)
#define MODULES_END _AC(0xffffffffff000000, UL)
#define MODULES_LEN (MODULES_END - MODULES_VADDR)
extern pteval_t __supported_pte_mask;
extern int nx_enabled;
-extern void set_nx(void);
#define pgprot_writecombine pgprot_writecombine
extern pgprot_t pgprot_writecombine(pgprot_t prot);
extern struct cpuinfo_x86 new_cpu_data;
extern struct tss_struct doublefault_tss;
-extern __u32 cleared_cpu_caps[NCAPINTS];
+extern __u32 cpu_caps_cleared[NCAPINTS];
+extern __u32 cpu_caps_set[NCAPINTS];
#ifdef CONFIG_SMP
DECLARE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
extern unsigned int xstate_size;
extern void free_thread_xstate(struct task_struct *);
extern struct kmem_cache *task_xstate_cachep;
-extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
-extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
-extern unsigned short num_cache_leaves;
struct thread_struct {
/* Cached TLS descriptors: */
unsigned short fsindex;
unsigned short gsindex;
#endif
+#ifdef CONFIG_X86_32
unsigned long ip;
+#endif
+#ifdef CONFIG_X86_64
unsigned long fs;
+#endif
unsigned long gs;
/* Hardware debugging registers: */
unsigned long debugreg0;
unsigned io_bitmap_max;
/* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */
unsigned long debugctlmsr;
-#ifdef CONFIG_X86_DS
-/* Debug Store context; see include/asm-x86/ds.h; goes into MSR_IA32_DS_AREA */
+ /* Debug Store context; see asm/ds.h */
struct ds_context *ds_ctx;
-#endif /* CONFIG_X86_DS */
-#ifdef CONFIG_X86_PTRACE_BTS
-/* the signal to send on a bts buffer overflow */
- unsigned int bts_ovfl_signal;
-#endif /* CONFIG_X86_PTRACE_BTS */
};
static inline unsigned long native_get_debugreg(int regno)
return debugctlmsr;
}
+static inline unsigned long get_debugctlmsr_on_cpu(int cpu)
+{
+ u64 debugctlmsr = 0;
+ u32 val1, val2;
+
+#ifndef CONFIG_X86_DEBUGCTLMSR
+ if (boot_cpu_data.x86 < 6)
+ return 0;
+#endif
+ rdmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR, &val1, &val2);
+ debugctlmsr = val1 | ((u64)val2 << 32);
+
+ return debugctlmsr;
+}
+
static inline void update_debugctlmsr(unsigned long debugctlmsr)
{
#ifndef CONFIG_X86_DEBUGCTLMSR
wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr);
}
+static inline void update_debugctlmsr_on_cpu(int cpu,
+ unsigned long debugctlmsr)
+{
+#ifndef CONFIG_X86_DEBUGCTLMSR
+ if (boot_cpu_data.x86 < 6)
+ return;
+#endif
+ wrmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR,
+ (u32)((u64)debugctlmsr),
+ (u32)((u64)debugctlmsr >> 32));
+}
+
/*
* from system description table in BIOS. Mostly for MCA use, but
* others may find it useful:
/* Boot loader type from the setup header: */
extern int bootloader_type;
+extern int bootloader_version;
extern char ignore_fpu_irq;
.vm86_info = NULL, \
.sysenter_cs = __KERNEL_CS, \
.io_bitmap_ptr = NULL, \
- .fs = __KERNEL_PERCPU, \
}
/*
extern int do_set_thread_area(struct task_struct *p, int idx,
struct user_desc __user *info, int can_allocate);
-extern void x86_ptrace_untrace(struct task_struct *);
-extern void x86_ptrace_fork(struct task_struct *child,
- unsigned long clone_flags);
+#ifdef CONFIG_X86_PTRACE_BTS
+extern void ptrace_bts_untrace(struct task_struct *tsk);
-#define arch_ptrace_untrace(tsk) x86_ptrace_untrace(tsk)
-#define arch_ptrace_fork(child, flags) x86_ptrace_fork(child, flags)
+#define arch_ptrace_untrace(tsk) ptrace_bts_untrace(tsk)
+#endif /* CONFIG_X86_PTRACE_BTS */
#endif /* __KERNEL__ */
#endif
#ifdef CONFIG_X86_64
+#ifdef CONFIG_PARAVIRT
+/* Paravirtualized systems may not have PSE or PGE available */
#define NEED_PSE 0
-#define NEED_MSR (1<<(X86_FEATURE_MSR & 31))
#define NEED_PGE 0
+#else
+#define NEED_PSE (1<<(X86_FEATURE_PSE) & 31)
+#define NEED_PGE (1<<(X86_FEATURE_PGE) & 31)
+#endif
+#define NEED_MSR (1<<(X86_FEATURE_MSR & 31))
#define NEED_FXSR (1<<(X86_FEATURE_FXSR & 31))
#define NEED_XMM (1<<(X86_FEATURE_XMM & 31))
#define NEED_XMM2 (1<<(X86_FEATURE_XMM2 & 31))
int (*setup_ioapic_ids)(void);
};
-extern void x86_quirk_pre_intr_init(void);
extern void x86_quirk_intr_init(void);
extern void x86_quirk_trap_init(void);
static inline int logical_smp_processor_id(void)
{
/* we don't want to mark this access volatile - bad code generation */
- return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
+ return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
}
#endif
#else /* CONFIG_X86_32 */
# define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
# define MAX_PHYSADDR_BITS 44
-# define MAX_PHYSMEM_BITS 44 /* Can be max 45 bits */
+# define MAX_PHYSMEM_BITS 46
#endif
#endif /* CONFIG_SPARSEMEM */
/*
* syscalls.h - Linux syscall interfaces (arch-specific)
*
- * Copyright (c) 2008 Jaswinder Singh
+ * Copyright (c) 2008 Jaswinder Singh Rajput
*
* This file is released under the GPLv2.
* See the file COPYING for more details.
#include <linux/compiler.h>
#include <linux/linkage.h>
-#include <linux/types.h>
#include <linux/signal.h>
+#include <linux/types.h>
/* Common in X86_32 and X86_64 */
/* kernel/ioport.c */
asmlinkage long sys_ioperm(unsigned long, unsigned long, int);
+/* kernel/process.c */
+int sys_fork(struct pt_regs *);
+int sys_vfork(struct pt_regs *);
+
/* kernel/ldt.c */
asmlinkage int sys_modify_ldt(int, void __user *, unsigned long);
+/* kernel/signal.c */
+long sys_rt_sigreturn(struct pt_regs *);
+
/* kernel/tls.c */
asmlinkage int sys_set_thread_area(struct user_desc __user *);
asmlinkage int sys_get_thread_area(struct user_desc __user *);
/* X86_32 only */
#ifdef CONFIG_X86_32
+/* kernel/ioport.c */
+long sys_iopl(struct pt_regs *);
+
/* kernel/process_32.c */
-int sys_fork(struct pt_regs *);
int sys_clone(struct pt_regs *);
-int sys_vfork(struct pt_regs *);
int sys_execve(struct pt_regs *);
-/* kernel/signal_32.c */
+/* kernel/signal.c */
asmlinkage int sys_sigsuspend(int, int, old_sigset_t);
asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
struct old_sigaction __user *);
int sys_sigaltstack(struct pt_regs *);
unsigned long sys_sigreturn(struct pt_regs *);
-long sys_rt_sigreturn(struct pt_regs *);
-
-/* kernel/ioport.c */
-long sys_iopl(struct pt_regs *);
/* kernel/sys_i386_32.c */
+struct mmap_arg_struct;
+struct sel_arg_struct;
+struct oldold_utsname;
+struct old_utsname;
+
asmlinkage long sys_mmap2(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long, unsigned long);
-struct mmap_arg_struct;
asmlinkage int old_mmap(struct mmap_arg_struct __user *);
-struct sel_arg_struct;
asmlinkage int old_select(struct sel_arg_struct __user *);
asmlinkage int sys_ipc(uint, int, int, int, void __user *, long);
-struct old_utsname;
asmlinkage int sys_uname(struct old_utsname __user *);
-struct oldold_utsname;
asmlinkage int sys_olduname(struct oldold_utsname __user *);
/* kernel/vm86_32.c */
#else /* CONFIG_X86_32 */
/* X86_64 only */
+/* kernel/ioport.c */
+asmlinkage long sys_iopl(unsigned int, struct pt_regs *);
+
/* kernel/process_64.c */
-asmlinkage long sys_fork(struct pt_regs *);
asmlinkage long sys_clone(unsigned long, unsigned long,
void __user *, void __user *,
struct pt_regs *);
-asmlinkage long sys_vfork(struct pt_regs *);
asmlinkage long sys_execve(char __user *, char __user * __user *,
char __user * __user *,
struct pt_regs *);
long sys_arch_prctl(int, unsigned long);
-/* kernel/ioport.c */
-asmlinkage long sys_iopl(unsigned int, struct pt_regs *);
-
-/* kernel/signal_64.c */
+/* kernel/signal.c */
asmlinkage long sys_sigaltstack(const stack_t __user *, stack_t __user *,
struct pt_regs *);
-long sys_rt_sigreturn(struct pt_regs *);
/* kernel/sys_x86_64.c */
+struct new_utsname;
+
asmlinkage long sys_mmap(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long, unsigned long);
-struct new_utsname;
asmlinkage long sys_uname(struct new_utsname __user *);
#endif /* CONFIG_X86_32 */
#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
-#define TIF_SYSCALL_FTRACE 27 /* for ftrace syscall instrumentation */
+#define TIF_LAZY_MMU_UPDATES 27 /* task is updating the mmu lazily */
+#define TIF_SYSCALL_FTRACE 28 /* for ftrace syscall instrumentation */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
+#define _TIF_LAZY_MMU_UPDATES (1 << TIF_LAZY_MMU_UPDATES)
#define _TIF_SYSCALL_FTRACE (1 << TIF_SYSCALL_FTRACE)
/* work to do in syscall_trace_enter() */
static inline void __native_flush_tlb(void)
{
- write_cr3(read_cr3());
+ native_write_cr3(native_read_cr3());
}
static inline void __native_flush_tlb_global(void)
*/
raw_local_irq_save(flags);
- cr4 = read_cr4();
+ cr4 = native_read_cr4();
/* clear PGE */
- write_cr4(cr4 & ~X86_CR4_PGE);
+ native_write_cr4(cr4 & ~X86_CR4_PGE);
/* write old PGE again and flush TLBs */
- write_cr4(cr4);
+ native_write_cr4(cr4);
raw_local_irq_restore(flags);
}
void x86_pci_root_bus_res_quirks(struct pci_bus *b);
#ifdef CONFIG_SMP
-#define mc_capable() (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids)
+#define mc_capable() ((boot_cpu_data.x86_max_cores > 1) && \
+ (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
#define smt_capable() (smp_num_siblings > 1)
#endif
#define _ASM_X86_TRAPS_H
#include <asm/debugreg.h>
+#include <asm/siginfo.h> /* TRAP_TRACE, ... */
#ifdef CONFIG_X86_32
#define dotraplinkage
asmlinkage void debug(void);
asmlinkage void nmi(void);
asmlinkage void int3(void);
+asmlinkage void xen_debug(void);
+asmlinkage void xen_int3(void);
+asmlinkage void xen_stack_segment(void);
asmlinkage void overflow(void);
asmlinkage void bounds(void);
asmlinkage void invalid_op(void);
}
extern int panic_on_unrecovered_nmi;
-extern int kstack_depth_to_print;
void math_error(void __user *);
void math_emulate(struct math_emu_info *);
#define __NR_inotify_init1 332
#define __NR_preadv 333
#define __NR_pwritev 334
+#define __NR_rt_tgsigqueueinfo 335
+#define __NR_perf_counter_open 336
#ifdef __KERNEL__
__SYSCALL(__NR_preadv, sys_preadv)
#define __NR_pwritev 296
__SYSCALL(__NR_pwritev, sys_pwritev)
-
+#define __NR_rt_tgsigqueueinfo 297
+__SYSCALL(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo)
+#define __NR_perf_counter_open 298
+__SYSCALL(__NR_perf_counter_open, sys_perf_counter_open)
#ifndef __NO_STUBS
#define __ARCH_WANT_OLD_READDIR
#define UV_CPUS_PER_ACT_STATUS 32
#define UV_ACT_STATUS_MASK 0x3
#define UV_ACT_STATUS_SIZE 2
-#define UV_ACTIVATION_DESCRIPTOR_SIZE 32
+#define UV_ADP_SIZE 32
#define UV_DISTRIBUTION_SIZE 256
#define UV_SW_ACK_NPENDING 8
#define UV_NET_ENDPOINT_INTD 0x38
struct uv_hub_info_s {
unsigned long global_mmr_base;
unsigned long gpa_mask;
+ unsigned int gnode_extra;
unsigned long gnode_upper;
unsigned long lowmem_remap_top;
unsigned long lowmem_remap_base;
* p - PNODE (local part of nsids, right shifted 1)
*/
#define UV_NASID_TO_PNODE(n) (((n) >> 1) & uv_hub_info->pnode_mask)
-#define UV_PNODE_TO_NASID(p) (((p) << 1) | uv_hub_info->gnode_upper)
+#define UV_PNODE_TO_GNODE(p) ((p) |uv_hub_info->gnode_extra)
+#define UV_PNODE_TO_NASID(p) (UV_PNODE_TO_GNODE(p) << 1)
#define UV_LOCAL_MMR_BASE 0xf4000000UL
#define UV_GLOBAL_MMR32_BASE 0xf8000000UL
#define UV_GLOBAL_MMR32_PNODE_BITS(p) ((p) << (UV_GLOBAL_MMR32_PNODE_SHIFT))
#define UV_GLOBAL_MMR64_PNODE_BITS(p) \
- ((unsigned long)(p) << UV_GLOBAL_MMR64_PNODE_SHIFT)
+ ((unsigned long)(UV_PNODE_TO_GNODE(p)) << UV_GLOBAL_MMR64_PNODE_SHIFT)
#define UV_APIC_PNODE_SHIFT 6
obj-y := process_$(BITS).o signal.o entry_$(BITS).o
obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time_$(BITS).o ioport.o ldt.o dumpstack.o
-obj-y += setup.o i8259.o irqinit_$(BITS).o
+obj-y += setup.o i8259.o irqinit.o
obj-$(CONFIG_X86_VISWS) += visws_quirks.o
obj-$(CONFIG_X86_32) += probe_roms_32.o
obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o
obj-y += i387.o xsave.o
obj-y += ptrace.o
obj-$(CONFIG_X86_DS) += ds.o
+obj-$(CONFIG_X86_DS_SELFTEST) += ds_selftest.o
obj-$(CONFIG_X86_32) += tls.o
obj-$(CONFIG_IA32_EMULATION) += tls.o
obj-y += step.o
#include <linux/irq.h>
#include <linux/bootmem.h>
#include <linux/ioport.h>
+#include <linux/pci.h>
#include <asm/pgtable.h>
#include <asm/io_apic.h>
* success: return IRQ number (>=0)
* failure: return < 0
*/
-int acpi_register_gsi(u32 gsi, int triggering, int polarity)
+int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
{
unsigned int irq;
unsigned int plat_gsi = gsi;
* Make sure all (legacy) PCI IRQs are set as level-triggered.
*/
if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
- if (triggering == ACPI_LEVEL_SENSITIVE)
+ if (trigger == ACPI_LEVEL_SENSITIVE)
eisa_set_level_irq(gsi);
}
#endif
#ifdef CONFIG_X86_IO_APIC
if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
- plat_gsi = mp_register_gsi(gsi, triggering, polarity);
+ plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
}
#endif
acpi_gsi_to_irq(plat_gsi, &irq);
#endif
static struct {
- int apic_id;
int gsi_base;
int gsi_end;
- DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
} mp_ioapic_routing[MAX_IO_APICS];
int mp_find_ioapic(int gsi)
set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
mp_ioapics[idx].apicid = uniq_ioapic_id(id);
-#ifdef CONFIG_X86_32
mp_ioapics[idx].apicver = io_apic_get_version(idx);
-#else
- mp_ioapics[idx].apicver = 0;
-#endif
+
/*
* Build basic GSI lookup table to facilitate gsi->io_apic lookups
* and to prevent reprogramming of IOAPIC pins (PCI GSIs).
*/
- mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].apicid;
mp_ioapic_routing[idx].gsi_base = gsi_base;
mp_ioapic_routing[idx].gsi_end = gsi_base +
io_apic_get_redir_entries(idx);
}
}
-int mp_register_gsi(u32 gsi, int triggering, int polarity)
+static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
+ int polarity)
{
+#ifdef CONFIG_X86_MPPARSE
+ struct mpc_intsrc mp_irq;
+ struct pci_dev *pdev;
+ unsigned char number;
+ unsigned int devfn;
int ioapic;
- int ioapic_pin;
-#ifdef CONFIG_X86_32
-#define MAX_GSI_NUM 4096
-#define IRQ_COMPRESSION_START 64
+ u8 pin;
- static int pci_irq = IRQ_COMPRESSION_START;
- /*
- * Mapping between Global System Interrupts, which
- * represent all possible interrupts, and IRQs
- * assigned to actual devices.
- */
- static int gsi_to_irq[MAX_GSI_NUM];
-#else
+ if (!acpi_ioapic)
+ return 0;
+ if (!dev)
+ return 0;
+ if (dev->bus != &pci_bus_type)
+ return 0;
+
+ pdev = to_pci_dev(dev);
+ number = pdev->bus->number;
+ devfn = pdev->devfn;
+ pin = pdev->pin;
+ /* print the entry should happen on mptable identically */
+ mp_irq.type = MP_INTSRC;
+ mp_irq.irqtype = mp_INT;
+ mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
+ (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
+ mp_irq.srcbus = number;
+ mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
+ ioapic = mp_find_ioapic(gsi);
+ mp_irq.dstapic = mp_ioapics[ioapic].apicid;
+ mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
+
+ save_mp_irq(&mp_irq);
+#endif
+ return 0;
+}
+
+int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
+{
+ int ioapic;
+ int ioapic_pin;
+ struct io_apic_irq_attr irq_attr;
if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
return gsi;
-#endif
/* Don't set up the ACPI SCI because it's already set up */
if (acpi_gbl_FADT.sci_interrupt == gsi)
gsi = ioapic_renumber_irq(ioapic, gsi);
#endif
- /*
- * Avoid pin reprogramming. PRTs typically include entries
- * with redundant pin->gsi mappings (but unique PCI devices);
- * we only program the IOAPIC on the first.
- */
if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
printk(KERN_ERR "Invalid reference to IOAPIC pin "
- "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
+ "%d-%d\n", mp_ioapics[ioapic].apicid,
ioapic_pin);
return gsi;
}
- if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
- pr_debug("Pin %d-%d already programmed\n",
- mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
-#ifdef CONFIG_X86_32
- return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
-#else
- return gsi;
-#endif
- }
-
- set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
-#ifdef CONFIG_X86_32
- /*
- * For GSI >= 64, use IRQ compression
- */
- if ((gsi >= IRQ_COMPRESSION_START)
- && (triggering == ACPI_LEVEL_SENSITIVE)) {
- /*
- * For PCI devices assign IRQs in order, avoiding gaps
- * due to unused I/O APIC pins.
- */
- int irq = gsi;
- if (gsi < MAX_GSI_NUM) {
- /*
- * Retain the VIA chipset work-around (gsi > 15), but
- * avoid a problem where the 8254 timer (IRQ0) is setup
- * via an override (so it's not on pin 0 of the ioapic),
- * and at the same time, the pin 0 interrupt is a PCI
- * type. The gsi > 15 test could cause these two pins
- * to be shared as IRQ0, and they are not shareable.
- * So test for this condition, and if necessary, avoid
- * the pin collision.
- */
- gsi = pci_irq++;
- /*
- * Don't assign IRQ used by ACPI SCI
- */
- if (gsi == acpi_gbl_FADT.sci_interrupt)
- gsi = pci_irq++;
- gsi_to_irq[irq] = gsi;
- } else {
- printk(KERN_ERR "GSI %u is too high\n", gsi);
- return gsi;
- }
- }
-#endif
- io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
- triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
- polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
- return gsi;
-}
-int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
- u32 gsi, int triggering, int polarity)
-{
-#ifdef CONFIG_X86_MPPARSE
- struct mpc_intsrc mp_irq;
- int ioapic;
+ if (enable_update_mptable)
+ mp_config_acpi_gsi(dev, gsi, trigger, polarity);
- if (!acpi_ioapic)
- return 0;
+ set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
+ trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
+ polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
+ io_apic_set_pci_routing(dev, gsi, &irq_attr);
- /* print the entry should happen on mptable identically */
- mp_irq.type = MP_INTSRC;
- mp_irq.irqtype = mp_INT;
- mp_irq.irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
- (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
- mp_irq.srcbus = number;
- mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
- ioapic = mp_find_ioapic(gsi);
- mp_irq.dstapic = mp_ioapic_routing[ioapic].apic_id;
- mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
-
- save_mp_irq(&mp_irq);
-#endif
- return 0;
+ return gsi;
}
/*
always := wakeup.bin
targets := wakeup.elf wakeup.lds
-wakeup-y += wakeup.o wakemain.o video-mode.o copy.o
+wakeup-y += wakeup.o wakemain.o video-mode.o copy.o bioscall.o regs.o
# The link order of the video-*.o modules can matter. In particular,
# video-vga.o *must* be listed first, followed by video-vesa.o.
--- /dev/null
+#include "../../../boot/bioscall.S"
--- /dev/null
+#include "../../../boot/regs.c"
static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
struct unity_map_entry *e);
static struct dma_ops_domain *find_protection_domain(u16 devid);
+static u64* alloc_pte(struct protection_domain *dom,
+ unsigned long address, u64
+ **pte_page, gfp_t gfp);
+static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
+ unsigned long start_page,
+ unsigned int pages);
+#ifndef BUS_NOTIFY_UNBOUND_DRIVER
+#define BUS_NOTIFY_UNBOUND_DRIVER 0x0005
+#endif
#ifdef CONFIG_AMD_IOMMU_STATS
{
struct amd_iommu *iommu;
- list_for_each_entry(iommu, &amd_iommu_list, list)
+ for_each_iommu(iommu)
iommu_poll_events(iommu);
return IRQ_HANDLED;
__iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
domid, 1, 1);
- list_for_each_entry(iommu, &amd_iommu_list, list) {
+ for_each_iommu(iommu) {
spin_lock_irqsave(&iommu->lock, flags);
__iommu_queue_command(iommu, &cmd);
__iommu_completion_wait(iommu);
}
}
+void amd_iommu_flush_all_domains(void)
+{
+ int i;
+
+ for (i = 1; i < MAX_DOMAIN_ID; ++i) {
+ if (!test_bit(i, amd_iommu_pd_alloc_bitmap))
+ continue;
+ iommu_flush_domain(i);
+ }
+}
+
+void amd_iommu_flush_all_devices(void)
+{
+ struct amd_iommu *iommu;
+ int i;
+
+ for (i = 0; i <= amd_iommu_last_bdf; ++i) {
+ if (amd_iommu_pd_table[i] == NULL)
+ continue;
+
+ iommu = amd_iommu_rlookup_table[i];
+ if (!iommu)
+ continue;
+
+ iommu_queue_inv_dev_entry(iommu, i);
+ iommu_completion_wait(iommu);
+ }
+}
+
/****************************************************************************
*
* The functions below are used the create the page table mappings for
unsigned long phys_addr,
int prot)
{
- u64 __pte, *pte, *page;
+ u64 __pte, *pte;
bus_addr = PAGE_ALIGN(bus_addr);
phys_addr = PAGE_ALIGN(phys_addr);
if (bus_addr > IOMMU_MAP_SIZE_L3 || !(prot & IOMMU_PROT_MASK))
return -EINVAL;
- pte = &dom->pt_root[IOMMU_PTE_L2_INDEX(bus_addr)];
-
- if (!IOMMU_PTE_PRESENT(*pte)) {
- page = (u64 *)get_zeroed_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- *pte = IOMMU_L2_PDE(virt_to_phys(page));
- }
-
- pte = IOMMU_PTE_PAGE(*pte);
- pte = &pte[IOMMU_PTE_L1_INDEX(bus_addr)];
-
- if (!IOMMU_PTE_PRESENT(*pte)) {
- page = (u64 *)get_zeroed_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- *pte = IOMMU_L1_PDE(virt_to_phys(page));
- }
-
- pte = IOMMU_PTE_PAGE(*pte);
- pte = &pte[IOMMU_PTE_L0_INDEX(bus_addr)];
+ pte = alloc_pte(dom, bus_addr, NULL, GFP_KERNEL);
if (IOMMU_PTE_PRESENT(*pte))
return -EBUSY;
* as allocated in the aperture
*/
if (addr < dma_dom->aperture_size)
- __set_bit(addr >> PAGE_SHIFT, dma_dom->bitmap);
+ __set_bit(addr >> PAGE_SHIFT,
+ dma_dom->aperture[0]->bitmap);
}
return 0;
****************************************************************************/
/*
- * The address allocator core function.
+ * The address allocator core functions.
*
* called with domain->lock held
*/
+
+/*
+ * This function checks if there is a PTE for a given dma address. If
+ * there is one, it returns the pointer to it.
+ */
+static u64* fetch_pte(struct protection_domain *domain,
+ unsigned long address)
+{
+ u64 *pte;
+
+ pte = &domain->pt_root[IOMMU_PTE_L2_INDEX(address)];
+
+ if (!IOMMU_PTE_PRESENT(*pte))
+ return NULL;
+
+ pte = IOMMU_PTE_PAGE(*pte);
+ pte = &pte[IOMMU_PTE_L1_INDEX(address)];
+
+ if (!IOMMU_PTE_PRESENT(*pte))
+ return NULL;
+
+ pte = IOMMU_PTE_PAGE(*pte);
+ pte = &pte[IOMMU_PTE_L0_INDEX(address)];
+
+ return pte;
+}
+
+/*
+ * This function is used to add a new aperture range to an existing
+ * aperture in case of dma_ops domain allocation or address allocation
+ * failure.
+ */
+static int alloc_new_range(struct amd_iommu *iommu,
+ struct dma_ops_domain *dma_dom,
+ bool populate, gfp_t gfp)
+{
+ int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
+ int i;
+
+#ifdef CONFIG_IOMMU_STRESS
+ populate = false;
+#endif
+
+ if (index >= APERTURE_MAX_RANGES)
+ return -ENOMEM;
+
+ dma_dom->aperture[index] = kzalloc(sizeof(struct aperture_range), gfp);
+ if (!dma_dom->aperture[index])
+ return -ENOMEM;
+
+ dma_dom->aperture[index]->bitmap = (void *)get_zeroed_page(gfp);
+ if (!dma_dom->aperture[index]->bitmap)
+ goto out_free;
+
+ dma_dom->aperture[index]->offset = dma_dom->aperture_size;
+
+ if (populate) {
+ unsigned long address = dma_dom->aperture_size;
+ int i, num_ptes = APERTURE_RANGE_PAGES / 512;
+ u64 *pte, *pte_page;
+
+ for (i = 0; i < num_ptes; ++i) {
+ pte = alloc_pte(&dma_dom->domain, address,
+ &pte_page, gfp);
+ if (!pte)
+ goto out_free;
+
+ dma_dom->aperture[index]->pte_pages[i] = pte_page;
+
+ address += APERTURE_RANGE_SIZE / 64;
+ }
+ }
+
+ dma_dom->aperture_size += APERTURE_RANGE_SIZE;
+
+ /* Intialize the exclusion range if necessary */
+ if (iommu->exclusion_start &&
+ iommu->exclusion_start >= dma_dom->aperture[index]->offset &&
+ iommu->exclusion_start < dma_dom->aperture_size) {
+ unsigned long startpage = iommu->exclusion_start >> PAGE_SHIFT;
+ int pages = iommu_num_pages(iommu->exclusion_start,
+ iommu->exclusion_length,
+ PAGE_SIZE);
+ dma_ops_reserve_addresses(dma_dom, startpage, pages);
+ }
+
+ /*
+ * Check for areas already mapped as present in the new aperture
+ * range and mark those pages as reserved in the allocator. Such
+ * mappings may already exist as a result of requested unity
+ * mappings for devices.
+ */
+ for (i = dma_dom->aperture[index]->offset;
+ i < dma_dom->aperture_size;
+ i += PAGE_SIZE) {
+ u64 *pte = fetch_pte(&dma_dom->domain, i);
+ if (!pte || !IOMMU_PTE_PRESENT(*pte))
+ continue;
+
+ dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1);
+ }
+
+ return 0;
+
+out_free:
+ free_page((unsigned long)dma_dom->aperture[index]->bitmap);
+
+ kfree(dma_dom->aperture[index]);
+ dma_dom->aperture[index] = NULL;
+
+ return -ENOMEM;
+}
+
+static unsigned long dma_ops_area_alloc(struct device *dev,
+ struct dma_ops_domain *dom,
+ unsigned int pages,
+ unsigned long align_mask,
+ u64 dma_mask,
+ unsigned long start)
+{
+ unsigned long next_bit = dom->next_address % APERTURE_RANGE_SIZE;
+ int max_index = dom->aperture_size >> APERTURE_RANGE_SHIFT;
+ int i = start >> APERTURE_RANGE_SHIFT;
+ unsigned long boundary_size;
+ unsigned long address = -1;
+ unsigned long limit;
+
+ next_bit >>= PAGE_SHIFT;
+
+ boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1,
+ PAGE_SIZE) >> PAGE_SHIFT;
+
+ for (;i < max_index; ++i) {
+ unsigned long offset = dom->aperture[i]->offset >> PAGE_SHIFT;
+
+ if (dom->aperture[i]->offset >= dma_mask)
+ break;
+
+ limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset,
+ dma_mask >> PAGE_SHIFT);
+
+ address = iommu_area_alloc(dom->aperture[i]->bitmap,
+ limit, next_bit, pages, 0,
+ boundary_size, align_mask);
+ if (address != -1) {
+ address = dom->aperture[i]->offset +
+ (address << PAGE_SHIFT);
+ dom->next_address = address + (pages << PAGE_SHIFT);
+ break;
+ }
+
+ next_bit = 0;
+ }
+
+ return address;
+}
+
static unsigned long dma_ops_alloc_addresses(struct device *dev,
struct dma_ops_domain *dom,
unsigned int pages,
unsigned long align_mask,
u64 dma_mask)
{
- unsigned long limit;
unsigned long address;
- unsigned long boundary_size;
- boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1,
- PAGE_SIZE) >> PAGE_SHIFT;
- limit = iommu_device_max_index(dom->aperture_size >> PAGE_SHIFT, 0,
- dma_mask >> PAGE_SHIFT);
+#ifdef CONFIG_IOMMU_STRESS
+ dom->next_address = 0;
+ dom->need_flush = true;
+#endif
- if (dom->next_bit >= limit) {
- dom->next_bit = 0;
- dom->need_flush = true;
- }
+ address = dma_ops_area_alloc(dev, dom, pages, align_mask,
+ dma_mask, dom->next_address);
- address = iommu_area_alloc(dom->bitmap, limit, dom->next_bit, pages,
- 0 , boundary_size, align_mask);
if (address == -1) {
- address = iommu_area_alloc(dom->bitmap, limit, 0, pages,
- 0, boundary_size, align_mask);
+ dom->next_address = 0;
+ address = dma_ops_area_alloc(dev, dom, pages, align_mask,
+ dma_mask, 0);
dom->need_flush = true;
}
- if (likely(address != -1)) {
- dom->next_bit = address + pages;
- address <<= PAGE_SHIFT;
- } else
+ if (unlikely(address == -1))
address = bad_dma_address;
WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size);
unsigned long address,
unsigned int pages)
{
- address >>= PAGE_SHIFT;
- iommu_area_free(dom->bitmap, address, pages);
+ unsigned i = address >> APERTURE_RANGE_SHIFT;
+ struct aperture_range *range = dom->aperture[i];
- if (address >= dom->next_bit)
+ BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL);
+
+#ifdef CONFIG_IOMMU_STRESS
+ if (i < 4)
+ return;
+#endif
+
+ if (address >= dom->next_address)
dom->need_flush = true;
+
+ address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT;
+
+ iommu_area_free(range->bitmap, address, pages);
+
}
/****************************************************************************
unsigned long start_page,
unsigned int pages)
{
- unsigned int last_page = dom->aperture_size >> PAGE_SHIFT;
+ unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT;
if (start_page + pages > last_page)
pages = last_page - start_page;
- iommu_area_reserve(dom->bitmap, start_page, pages);
+ for (i = start_page; i < start_page + pages; ++i) {
+ int index = i / APERTURE_RANGE_PAGES;
+ int page = i % APERTURE_RANGE_PAGES;
+ __set_bit(page, dom->aperture[index]->bitmap);
+ }
}
static void free_pagetable(struct protection_domain *domain)
*/
static void dma_ops_domain_free(struct dma_ops_domain *dom)
{
+ int i;
+
if (!dom)
return;
free_pagetable(&dom->domain);
- kfree(dom->pte_pages);
-
- kfree(dom->bitmap);
+ for (i = 0; i < APERTURE_MAX_RANGES; ++i) {
+ if (!dom->aperture[i])
+ continue;
+ free_page((unsigned long)dom->aperture[i]->bitmap);
+ kfree(dom->aperture[i]);
+ }
kfree(dom);
}
* It also intializes the page table and the address allocator data
* structures required for the dma_ops interface
*/
-static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu,
- unsigned order)
+static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu)
{
struct dma_ops_domain *dma_dom;
- unsigned i, num_pte_pages;
- u64 *l2_pde;
- u64 address;
-
- /*
- * Currently the DMA aperture must be between 32 MB and 1GB in size
- */
- if ((order < 25) || (order > 30))
- return NULL;
dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL);
if (!dma_dom)
dma_dom->domain.priv = dma_dom;
if (!dma_dom->domain.pt_root)
goto free_dma_dom;
- dma_dom->aperture_size = (1ULL << order);
- dma_dom->bitmap = kzalloc(dma_dom->aperture_size / (PAGE_SIZE * 8),
- GFP_KERNEL);
- if (!dma_dom->bitmap)
- goto free_dma_dom;
- /*
- * mark the first page as allocated so we never return 0 as
- * a valid dma-address. So we can use 0 as error value
- */
- dma_dom->bitmap[0] = 1;
- dma_dom->next_bit = 0;
dma_dom->need_flush = false;
dma_dom->target_dev = 0xffff;
- /* Intialize the exclusion range if necessary */
- if (iommu->exclusion_start &&
- iommu->exclusion_start < dma_dom->aperture_size) {
- unsigned long startpage = iommu->exclusion_start >> PAGE_SHIFT;
- int pages = iommu_num_pages(iommu->exclusion_start,
- iommu->exclusion_length,
- PAGE_SIZE);
- dma_ops_reserve_addresses(dma_dom, startpage, pages);
- }
+ if (alloc_new_range(iommu, dma_dom, true, GFP_KERNEL))
+ goto free_dma_dom;
/*
- * At the last step, build the page tables so we don't need to
- * allocate page table pages in the dma_ops mapping/unmapping
- * path.
+ * mark the first page as allocated so we never return 0 as
+ * a valid dma-address. So we can use 0 as error value
*/
- num_pte_pages = dma_dom->aperture_size / (PAGE_SIZE * 512);
- dma_dom->pte_pages = kzalloc(num_pte_pages * sizeof(void *),
- GFP_KERNEL);
- if (!dma_dom->pte_pages)
- goto free_dma_dom;
-
- l2_pde = (u64 *)get_zeroed_page(GFP_KERNEL);
- if (l2_pde == NULL)
- goto free_dma_dom;
+ dma_dom->aperture[0]->bitmap[0] = 1;
+ dma_dom->next_address = 0;
- dma_dom->domain.pt_root[0] = IOMMU_L2_PDE(virt_to_phys(l2_pde));
-
- for (i = 0; i < num_pte_pages; ++i) {
- dma_dom->pte_pages[i] = (u64 *)get_zeroed_page(GFP_KERNEL);
- if (!dma_dom->pte_pages[i])
- goto free_dma_dom;
- address = virt_to_phys(dma_dom->pte_pages[i]);
- l2_pde[i] = IOMMU_L1_PDE(address);
- }
return dma_dom;
struct protection_domain *domain;
struct dma_ops_domain *dma_domain;
struct amd_iommu *iommu;
- int order = amd_iommu_aperture_order;
unsigned long flags;
if (devid > amd_iommu_last_bdf)
"to a non-dma-ops domain\n", dev_name(dev));
switch (action) {
- case BUS_NOTIFY_BOUND_DRIVER:
- if (domain)
- goto out;
- dma_domain = find_protection_domain(devid);
- if (!dma_domain)
- dma_domain = iommu->default_dom;
- attach_device(iommu, &dma_domain->domain, devid);
- printk(KERN_INFO "AMD IOMMU: Using protection domain %d for "
- "device %s\n", dma_domain->domain.id, dev_name(dev));
- break;
- case BUS_NOTIFY_UNBIND_DRIVER:
+ case BUS_NOTIFY_UNBOUND_DRIVER:
if (!domain)
goto out;
detach_device(domain, devid);
dma_domain = find_protection_domain(devid);
if (dma_domain)
goto out;
- dma_domain = dma_ops_domain_alloc(iommu, order);
+ dma_domain = dma_ops_domain_alloc(iommu);
if (!dma_domain)
goto out;
dma_domain->target_dev = devid;
dma_dom = (*iommu)->default_dom;
*domain = &dma_dom->domain;
attach_device(*iommu, *domain, *bdf);
- printk(KERN_INFO "AMD IOMMU: Using protection domain %d for "
- "device %s\n", (*domain)->id, dev_name(dev));
+ DUMP_printk("Using protection domain %d for device %s\n",
+ (*domain)->id, dev_name(dev));
}
if (domain_for_device(_bdf) == NULL)
return 1;
}
+/*
+ * If the pte_page is not yet allocated this function is called
+ */
+static u64* alloc_pte(struct protection_domain *dom,
+ unsigned long address, u64 **pte_page, gfp_t gfp)
+{
+ u64 *pte, *page;
+
+ pte = &dom->pt_root[IOMMU_PTE_L2_INDEX(address)];
+
+ if (!IOMMU_PTE_PRESENT(*pte)) {
+ page = (u64 *)get_zeroed_page(gfp);
+ if (!page)
+ return NULL;
+ *pte = IOMMU_L2_PDE(virt_to_phys(page));
+ }
+
+ pte = IOMMU_PTE_PAGE(*pte);
+ pte = &pte[IOMMU_PTE_L1_INDEX(address)];
+
+ if (!IOMMU_PTE_PRESENT(*pte)) {
+ page = (u64 *)get_zeroed_page(gfp);
+ if (!page)
+ return NULL;
+ *pte = IOMMU_L1_PDE(virt_to_phys(page));
+ }
+
+ pte = IOMMU_PTE_PAGE(*pte);
+
+ if (pte_page)
+ *pte_page = pte;
+
+ pte = &pte[IOMMU_PTE_L0_INDEX(address)];
+
+ return pte;
+}
+
+/*
+ * This function fetches the PTE for a given address in the aperture
+ */
+static u64* dma_ops_get_pte(struct dma_ops_domain *dom,
+ unsigned long address)
+{
+ struct aperture_range *aperture;
+ u64 *pte, *pte_page;
+
+ aperture = dom->aperture[APERTURE_RANGE_INDEX(address)];
+ if (!aperture)
+ return NULL;
+
+ pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)];
+ if (!pte) {
+ pte = alloc_pte(&dom->domain, address, &pte_page, GFP_ATOMIC);
+ aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page;
+ } else
+ pte += IOMMU_PTE_L0_INDEX(address);
+
+ return pte;
+}
+
/*
* This is the generic map function. It maps one 4kb page at paddr to
* the given address in the DMA address space for the domain.
paddr &= PAGE_MASK;
- pte = dom->pte_pages[IOMMU_PTE_L1_INDEX(address)];
- pte += IOMMU_PTE_L0_INDEX(address);
+ pte = dma_ops_get_pte(dom, address);
+ if (!pte)
+ return bad_dma_address;
__pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC;
struct dma_ops_domain *dom,
unsigned long address)
{
+ struct aperture_range *aperture;
u64 *pte;
if (address >= dom->aperture_size)
return;
- WARN_ON(address & ~PAGE_MASK || address >= dom->aperture_size);
+ aperture = dom->aperture[APERTURE_RANGE_INDEX(address)];
+ if (!aperture)
+ return;
+
+ pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)];
+ if (!pte)
+ return;
- pte = dom->pte_pages[IOMMU_PTE_L1_INDEX(address)];
pte += IOMMU_PTE_L0_INDEX(address);
WARN_ON(!*pte);
u64 dma_mask)
{
dma_addr_t offset = paddr & ~PAGE_MASK;
- dma_addr_t address, start;
+ dma_addr_t address, start, ret;
unsigned int pages;
unsigned long align_mask = 0;
int i;
if (align)
align_mask = (1UL << get_order(size)) - 1;
+retry:
address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask,
dma_mask);
- if (unlikely(address == bad_dma_address))
- goto out;
+ if (unlikely(address == bad_dma_address)) {
+ /*
+ * setting next_address here will let the address
+ * allocator only scan the new allocated range in the
+ * first run. This is a small optimization.
+ */
+ dma_dom->next_address = dma_dom->aperture_size;
+
+ if (alloc_new_range(iommu, dma_dom, false, GFP_ATOMIC))
+ goto out;
+
+ /*
+ * aperture was sucessfully enlarged by 128 MB, try
+ * allocation again
+ */
+ goto retry;
+ }
start = address;
for (i = 0; i < pages; ++i) {
- dma_ops_domain_map(iommu, dma_dom, start, paddr, dir);
+ ret = dma_ops_domain_map(iommu, dma_dom, start, paddr, dir);
+ if (ret == bad_dma_address)
+ goto out_unmap;
+
paddr += PAGE_SIZE;
start += PAGE_SIZE;
}
out:
return address;
+
+out_unmap:
+
+ for (--i; i >= 0; --i) {
+ start -= PAGE_SIZE;
+ dma_ops_domain_unmap(iommu, dma_dom, start);
+ }
+
+ dma_ops_free_addresses(dma_dom, address, pages);
+
+ return bad_dma_address;
}
/*
*dma_addr = __map_single(dev, iommu, domain->priv, paddr,
size, DMA_BIDIRECTIONAL, true, dma_mask);
- if (*dma_addr == bad_dma_address)
+ if (*dma_addr == bad_dma_address) {
+ spin_unlock_irqrestore(&domain->lock, flags);
goto out_free;
+ }
iommu_completion_wait(iommu);
struct pci_dev *dev = NULL;
struct dma_ops_domain *dma_dom;
struct amd_iommu *iommu;
- int order = amd_iommu_aperture_order;
u16 devid;
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
iommu = amd_iommu_rlookup_table[devid];
if (!iommu)
continue;
- dma_dom = dma_ops_domain_alloc(iommu, order);
+ dma_dom = dma_ops_domain_alloc(iommu);
if (!dma_dom)
continue;
init_unity_mappings_for_device(dma_dom, devid);
int __init amd_iommu_init_dma_ops(void)
{
struct amd_iommu *iommu;
- int order = amd_iommu_aperture_order;
int ret;
/*
* found in the system. Devices not assigned to any other
* protection domain will be assigned to the default one.
*/
- list_for_each_entry(iommu, &amd_iommu_list, list) {
- iommu->default_dom = dma_ops_domain_alloc(iommu, order);
+ for_each_iommu(iommu) {
+ iommu->default_dom = dma_ops_domain_alloc(iommu);
if (iommu->default_dom == NULL)
return -ENOMEM;
iommu->default_dom->domain.flags |= PD_DEFAULT_MASK;
free_domains:
- list_for_each_entry(iommu, &amd_iommu_list, list) {
+ for_each_iommu(iommu) {
if (iommu->default_dom)
dma_ops_domain_free(iommu->default_dom);
}
old_domain = domain_for_device(devid);
if (old_domain)
- return -EBUSY;
+ detach_device(old_domain, devid);
attach_device(iommu, domain, devid);
u64 range_length;
} __attribute__((packed));
+bool amd_iommu_dump;
+
static int __initdata amd_iommu_detected;
u16 amd_iommu_last_bdf; /* largest PCI device id we have
to handle */
LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings
we find in ACPI */
-unsigned amd_iommu_aperture_order = 26; /* size of aperture in power of 2 */
+#ifdef CONFIG_IOMMU_STRESS
+bool amd_iommu_isolate = false;
+#else
bool amd_iommu_isolate = true; /* if true, device isolation is
enabled */
+#endif
+
bool amd_iommu_unmap_flush; /* if true, flush on every unmap */
LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the
static inline unsigned long tbl_size(int entry_size)
{
unsigned shift = PAGE_SHIFT +
- get_order(amd_iommu_last_bdf * entry_size);
+ get_order(((int)amd_iommu_last_bdf + 1) * entry_size);
return 1UL << shift;
}
* This function set the exclusion range in the IOMMU. DMA accesses to the
* exclusion range are passed through untranslated
*/
-static void __init iommu_set_exclusion_range(struct amd_iommu *iommu)
+static void iommu_set_exclusion_range(struct amd_iommu *iommu)
{
u64 start = iommu->exclusion_start & PAGE_MASK;
u64 limit = (start + iommu->exclusion_length) & PAGE_MASK;
}
/* Generic functions to enable/disable certain features of the IOMMU. */
-static void __init iommu_feature_enable(struct amd_iommu *iommu, u8 bit)
+static void iommu_feature_enable(struct amd_iommu *iommu, u8 bit)
{
u32 ctrl;
}
/* Function to enable the hardware */
-static void __init iommu_enable(struct amd_iommu *iommu)
+static void iommu_enable(struct amd_iommu *iommu)
{
printk(KERN_INFO "AMD IOMMU: Enabling IOMMU at %s cap 0x%hx\n",
dev_name(&iommu->dev->dev), iommu->cap_ptr);
iommu_feature_enable(iommu, CONTROL_IOMMU_EN);
}
-/* Function to enable IOMMU event logging and event interrupts */
-static void __init iommu_enable_event_logging(struct amd_iommu *iommu)
+static void iommu_disable(struct amd_iommu *iommu)
{
- iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN);
- iommu_feature_enable(iommu, CONTROL_EVT_INT_EN);
+ iommu_feature_disable(iommu, CONTROL_IOMMU_EN);
}
/*
{
u8 *cmd_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(CMD_BUFFER_SIZE));
- u64 entry;
if (cmd_buf == NULL)
return NULL;
iommu->cmd_buf_size = CMD_BUFFER_SIZE;
- entry = (u64)virt_to_phys(cmd_buf);
+ return cmd_buf;
+}
+
+/*
+ * This function writes the command buffer address to the hardware and
+ * enables it.
+ */
+static void iommu_enable_command_buffer(struct amd_iommu *iommu)
+{
+ u64 entry;
+
+ BUG_ON(iommu->cmd_buf == NULL);
+
+ entry = (u64)virt_to_phys(iommu->cmd_buf);
entry |= MMIO_CMD_SIZE_512;
+
memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET,
- &entry, sizeof(entry));
+ &entry, sizeof(entry));
/* set head and tail to zero manually */
writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET);
writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET);
iommu_feature_enable(iommu, CONTROL_CMDBUF_EN);
-
- return cmd_buf;
}
static void __init free_command_buffer(struct amd_iommu *iommu)
/* allocates the memory where the IOMMU will log its events to */
static u8 * __init alloc_event_buffer(struct amd_iommu *iommu)
{
- u64 entry;
iommu->evt_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(EVT_BUFFER_SIZE));
if (iommu->evt_buf == NULL)
return NULL;
+ return iommu->evt_buf;
+}
+
+static void iommu_enable_event_buffer(struct amd_iommu *iommu)
+{
+ u64 entry;
+
+ BUG_ON(iommu->evt_buf == NULL);
+
entry = (u64)virt_to_phys(iommu->evt_buf) | EVT_LEN_MASK;
+
memcpy_toio(iommu->mmio_base + MMIO_EVT_BUF_OFFSET,
&entry, sizeof(entry));
- iommu->evt_buf_size = EVT_BUFFER_SIZE;
-
- return iommu->evt_buf;
+ iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN);
}
static void __init free_event_buffer(struct amd_iommu *iommu)
p += sizeof(struct ivhd_header);
end += h->length;
+
while (p < end) {
e = (struct ivhd_entry *)p;
switch (e->type) {
case IVHD_DEV_ALL:
+
+ DUMP_printk(" DEV_ALL\t\t\t first devid: %02x:%02x.%x"
+ " last device %02x:%02x.%x flags: %02x\n",
+ PCI_BUS(iommu->first_device),
+ PCI_SLOT(iommu->first_device),
+ PCI_FUNC(iommu->first_device),
+ PCI_BUS(iommu->last_device),
+ PCI_SLOT(iommu->last_device),
+ PCI_FUNC(iommu->last_device),
+ e->flags);
+
for (dev_i = iommu->first_device;
dev_i <= iommu->last_device; ++dev_i)
set_dev_entry_from_acpi(iommu, dev_i,
e->flags, 0);
break;
case IVHD_DEV_SELECT:
+
+ DUMP_printk(" DEV_SELECT\t\t\t devid: %02x:%02x.%x "
+ "flags: %02x\n",
+ PCI_BUS(e->devid),
+ PCI_SLOT(e->devid),
+ PCI_FUNC(e->devid),
+ e->flags);
+
devid = e->devid;
set_dev_entry_from_acpi(iommu, devid, e->flags, 0);
break;
case IVHD_DEV_SELECT_RANGE_START:
+
+ DUMP_printk(" DEV_SELECT_RANGE_START\t "
+ "devid: %02x:%02x.%x flags: %02x\n",
+ PCI_BUS(e->devid),
+ PCI_SLOT(e->devid),
+ PCI_FUNC(e->devid),
+ e->flags);
+
devid_start = e->devid;
flags = e->flags;
ext_flags = 0;
alias = false;
break;
case IVHD_DEV_ALIAS:
+
+ DUMP_printk(" DEV_ALIAS\t\t\t devid: %02x:%02x.%x "
+ "flags: %02x devid_to: %02x:%02x.%x\n",
+ PCI_BUS(e->devid),
+ PCI_SLOT(e->devid),
+ PCI_FUNC(e->devid),
+ e->flags,
+ PCI_BUS(e->ext >> 8),
+ PCI_SLOT(e->ext >> 8),
+ PCI_FUNC(e->ext >> 8));
+
devid = e->devid;
devid_to = e->ext >> 8;
- set_dev_entry_from_acpi(iommu, devid, e->flags, 0);
+ set_dev_entry_from_acpi(iommu, devid_to, e->flags, 0);
amd_iommu_alias_table[devid] = devid_to;
break;
case IVHD_DEV_ALIAS_RANGE:
+
+ DUMP_printk(" DEV_ALIAS_RANGE\t\t "
+ "devid: %02x:%02x.%x flags: %02x "
+ "devid_to: %02x:%02x.%x\n",
+ PCI_BUS(e->devid),
+ PCI_SLOT(e->devid),
+ PCI_FUNC(e->devid),
+ e->flags,
+ PCI_BUS(e->ext >> 8),
+ PCI_SLOT(e->ext >> 8),
+ PCI_FUNC(e->ext >> 8));
+
devid_start = e->devid;
flags = e->flags;
devid_to = e->ext >> 8;
alias = true;
break;
case IVHD_DEV_EXT_SELECT:
+
+ DUMP_printk(" DEV_EXT_SELECT\t\t devid: %02x:%02x.%x "
+ "flags: %02x ext: %08x\n",
+ PCI_BUS(e->devid),
+ PCI_SLOT(e->devid),
+ PCI_FUNC(e->devid),
+ e->flags, e->ext);
+
devid = e->devid;
set_dev_entry_from_acpi(iommu, devid, e->flags,
e->ext);
break;
case IVHD_DEV_EXT_SELECT_RANGE:
+
+ DUMP_printk(" DEV_EXT_SELECT_RANGE\t devid: "
+ "%02x:%02x.%x flags: %02x ext: %08x\n",
+ PCI_BUS(e->devid),
+ PCI_SLOT(e->devid),
+ PCI_FUNC(e->devid),
+ e->flags, e->ext);
+
devid_start = e->devid;
flags = e->flags;
ext_flags = e->ext;
alias = false;
break;
case IVHD_DEV_RANGE_END:
+
+ DUMP_printk(" DEV_RANGE_END\t\t devid: %02x:%02x.%x\n",
+ PCI_BUS(e->devid),
+ PCI_SLOT(e->devid),
+ PCI_FUNC(e->devid));
+
devid = e->devid;
for (dev_i = devid_start; dev_i <= devid; ++dev_i) {
if (alias)
{
struct amd_iommu *iommu, *next;
- list_for_each_entry_safe(iommu, next, &amd_iommu_list, list) {
+ for_each_iommu_safe(iommu, next) {
list_del(&iommu->list);
free_iommu_one(iommu);
kfree(iommu);
if (!iommu->mmio_base)
return -ENOMEM;
- iommu_set_device_table(iommu);
iommu->cmd_buf = alloc_command_buffer(iommu);
if (!iommu->cmd_buf)
return -ENOMEM;
h = (struct ivhd_header *)p;
switch (*p) {
case ACPI_IVHD_TYPE:
+
+ DUMP_printk("IOMMU: device: %02x:%02x.%01x cap: %04x "
+ "seg: %d flags: %01x info %04x\n",
+ PCI_BUS(h->devid), PCI_SLOT(h->devid),
+ PCI_FUNC(h->devid), h->cap_ptr,
+ h->pci_seg, h->flags, h->info);
+ DUMP_printk(" mmio-addr: %016llx\n",
+ h->mmio_phys);
+
iommu = kzalloc(sizeof(struct amd_iommu), GFP_KERNEL);
if (iommu == NULL)
return -ENOMEM;
*
****************************************************************************/
-static int __init iommu_setup_msix(struct amd_iommu *iommu)
-{
- struct amd_iommu *curr;
- struct msix_entry entries[32]; /* only 32 supported by AMD IOMMU */
- int nvec = 0, i;
-
- list_for_each_entry(curr, &amd_iommu_list, list) {
- if (curr->dev == iommu->dev) {
- entries[nvec].entry = curr->evt_msi_num;
- entries[nvec].vector = 0;
- curr->int_enabled = true;
- nvec++;
- }
- }
-
- if (pci_enable_msix(iommu->dev, entries, nvec)) {
- pci_disable_msix(iommu->dev);
- return 1;
- }
-
- for (i = 0; i < nvec; ++i) {
- int r = request_irq(entries->vector, amd_iommu_int_handler,
- IRQF_SAMPLE_RANDOM,
- "AMD IOMMU",
- NULL);
- if (r)
- goto out_free;
- }
-
- return 0;
-
-out_free:
- for (i -= 1; i >= 0; --i)
- free_irq(entries->vector, NULL);
-
- pci_disable_msix(iommu->dev);
-
- return 1;
-}
-
static int __init iommu_setup_msi(struct amd_iommu *iommu)
{
int r;
- struct amd_iommu *curr;
-
- list_for_each_entry(curr, &amd_iommu_list, list) {
- if (curr->dev == iommu->dev)
- curr->int_enabled = true;
- }
-
if (pci_enable_msi(iommu->dev))
return 1;
return 1;
}
+ iommu->int_enabled = true;
+ iommu_feature_enable(iommu, CONTROL_EVT_INT_EN);
+
return 0;
}
-static int __init iommu_init_msi(struct amd_iommu *iommu)
+static int iommu_init_msi(struct amd_iommu *iommu)
{
if (iommu->int_enabled)
return 0;
- if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSIX))
- return iommu_setup_msix(iommu);
- else if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI))
+ if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI))
return iommu_setup_msi(iommu);
return 1;
static int __init init_unity_map_range(struct ivmd_header *m)
{
struct unity_map_entry *e = 0;
+ char *s;
e = kzalloc(sizeof(*e), GFP_KERNEL);
if (e == NULL)
switch (m->type) {
default:
+ kfree(e);
+ return 0;
case ACPI_IVMD_TYPE:
+ s = "IVMD_TYPEi\t\t\t";
e->devid_start = e->devid_end = m->devid;
break;
case ACPI_IVMD_TYPE_ALL:
+ s = "IVMD_TYPE_ALL\t\t";
e->devid_start = 0;
e->devid_end = amd_iommu_last_bdf;
break;
case ACPI_IVMD_TYPE_RANGE:
+ s = "IVMD_TYPE_RANGE\t\t";
e->devid_start = m->devid;
e->devid_end = m->aux;
break;
e->address_end = e->address_start + PAGE_ALIGN(m->range_length);
e->prot = m->flags >> 1;
+ DUMP_printk("%s devid_start: %02x:%02x.%x devid_end: %02x:%02x.%x"
+ " range_start: %016llx range_end: %016llx flags: %x\n", s,
+ PCI_BUS(e->devid_start), PCI_SLOT(e->devid_start),
+ PCI_FUNC(e->devid_start), PCI_BUS(e->devid_end),
+ PCI_SLOT(e->devid_end), PCI_FUNC(e->devid_end),
+ e->address_start, e->address_end, m->flags);
+
list_add_tail(&e->list, &amd_iommu_unity_map);
return 0;
* This function finally enables all IOMMUs found in the system after
* they have been initialized
*/
-static void __init enable_iommus(void)
+static void enable_iommus(void)
{
struct amd_iommu *iommu;
- list_for_each_entry(iommu, &amd_iommu_list, list) {
+ for_each_iommu(iommu) {
+ iommu_set_device_table(iommu);
+ iommu_enable_command_buffer(iommu);
+ iommu_enable_event_buffer(iommu);
iommu_set_exclusion_range(iommu);
iommu_init_msi(iommu);
- iommu_enable_event_logging(iommu);
iommu_enable(iommu);
}
}
+static void disable_iommus(void)
+{
+ struct amd_iommu *iommu;
+
+ for_each_iommu(iommu)
+ iommu_disable(iommu);
+}
+
/*
* Suspend/Resume support
* disable suspend until real resume implemented
static int amd_iommu_resume(struct sys_device *dev)
{
+ /*
+ * Disable IOMMUs before reprogramming the hardware registers.
+ * IOMMU is still enabled from the resume kernel.
+ */
+ disable_iommus();
+
+ /* re-load the hardware */
+ enable_iommus();
+
+ /*
+ * we have to flush after the IOMMUs are enabled because a
+ * disabled IOMMU will never execute the commands we send
+ */
+ amd_iommu_flush_all_domains();
+ amd_iommu_flush_all_devices();
+
return 0;
}
static int amd_iommu_suspend(struct sys_device *dev, pm_message_t state)
{
- return -EINVAL;
+ /* disable IOMMUs to go out of the way for BIOS */
+ disable_iommus();
+
+ return 0;
}
static struct sysdev_class amd_iommu_sysdev_class = {
enable_iommus();
- printk(KERN_INFO "AMD IOMMU: aperture size is %d MB\n",
- (1 << (amd_iommu_aperture_order-20)));
-
printk(KERN_INFO "AMD IOMMU: device isolation ");
if (amd_iommu_isolate)
printk("enabled\n");
*
****************************************************************************/
+static int __init parse_amd_iommu_dump(char *str)
+{
+ amd_iommu_dump = true;
+
+ return 1;
+}
+
static int __init parse_amd_iommu_options(char *str)
{
for (; *str; ++str) {
return 1;
}
-static int __init parse_amd_iommu_size_options(char *str)
-{
- unsigned order = PAGE_SHIFT + get_order(memparse(str, &str));
-
- if ((order > 24) && (order < 31))
- amd_iommu_aperture_order = order;
-
- return 1;
-}
-
+__setup("amd_iommu_dump", parse_amd_iommu_dump);
__setup("amd_iommu=", parse_amd_iommu_options);
-__setup("amd_iommu_size=", parse_amd_iommu_size_options);
* Mikael Pettersson : PM converted to driver model.
*/
+#include <linux/perf_counter.h>
#include <linux/kernel_stat.h>
#include <linux/mc146818rtc.h>
#include <linux/acpi_pmtmr.h>
#include <linux/smp.h>
#include <linux/mm.h>
+#include <asm/perf_counter.h>
#include <asm/pgalloc.h>
#include <asm/atomic.h>
#include <asm/mpspec.h>
/* Local APIC was disabled by the BIOS and enabled by the kernel */
static int enabled_via_apicbase;
+/*
+ * Handle interrupt mode configuration register (IMCR).
+ * This register controls whether the interrupt signals
+ * that reach the BSP come from the master PIC or from the
+ * local APIC. Before entering Symmetric I/O Mode, either
+ * the BIOS or the operating system must switch out of
+ * PIC Mode by changing the IMCR.
+ */
+static inline void imcr_pic_to_apic(void)
+{
+ /* select IMCR register */
+ outb(0x70, 0x22);
+ /* NMI and 8259 INTR go through APIC */
+ outb(0x01, 0x23);
+}
+
+static inline void imcr_apic_to_pic(void)
+{
+ /* select IMCR register */
+ outb(0x70, 0x22);
+ /* NMI and 8259 INTR go directly to BSP */
+ outb(0x00, 0x23);
+}
#endif
#ifdef CONFIG_X86_64
__setup("apicpmtimer", setup_apicpmtimer);
#endif
+int x2apic_mode;
#ifdef CONFIG_X86_X2APIC
-int x2apic;
/* x2apic enabled before OS handover */
static int x2apic_preenabled;
static int disable_x2apic;
static __init int setup_nox2apic(char *str)
{
+ if (x2apic_enabled()) {
+ pr_warning("Bios already enabled x2apic, "
+ "can't enforce nox2apic");
+ return 0;
+ }
+
disable_x2apic = 1;
setup_clear_cpu_cap(X86_FEATURE_X2APIC);
return 0;
return lapic_get_version() >= 0x14;
}
+/*
+ * bare function to substitute write operation
+ * and it's _that_ fast :)
+ */
+static void native_apic_write_dummy(u32 reg, u32 v)
+{
+ WARN_ON_ONCE((cpu_has_apic || !disable_apic));
+}
+
+static u32 native_apic_read_dummy(u32 reg)
+{
+ WARN_ON_ONCE((cpu_has_apic && !disable_apic));
+ return 0;
+}
+
+/*
+ * right after this call apic->write/read doesn't do anything
+ * note that there is no restore operation it works one way
+ */
+void apic_disable(void)
+{
+ apic->read = native_apic_read_dummy;
+ apic->write = native_apic_write_dummy;
+}
+
void native_apic_wait_icr_idle(void)
{
while (apic_read(APIC_ICR) & APIC_ICR_BUSY)
static void setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask)
{
- unsigned long reg = (lvt_off << 4) + APIC_EILVT0;
+ unsigned long reg = (lvt_off << 4) + APIC_EILVTn(0);
unsigned int v = (mask << 16) | (msg_type << 8) | vector;
apic_write(reg, v);
u32 v;
/* APIC hasn't been mapped yet */
- if (!x2apic && !apic_phys)
+ if (!x2apic_mode && !apic_phys)
return;
maxlvt = lapic_get_maxlvt();
apic_write(APIC_ESR, 0);
}
#endif
+ perf_counters_lapic_init();
preempt_disable();
{
if (x2apic_enabled()) {
pr_info("x2apic enabled by BIOS, switching to x2apic ops\n");
- x2apic_preenabled = x2apic = 1;
+ x2apic_preenabled = x2apic_mode = 1;
}
}
{
int msr, msr2;
- if (!x2apic)
+ if (!x2apic_mode)
return;
rdmsr(MSR_IA32_APICBASE, msr, msr2);
wrmsr(MSR_IA32_APICBASE, msr | X2APIC_ENABLE, 0);
}
}
+#endif /* CONFIG_X86_X2APIC */
void __init enable_IR_x2apic(void)
{
unsigned long flags;
struct IO_APIC_route_entry **ioapic_entries = NULL;
- if (!cpu_has_x2apic)
- return;
-
- if (!x2apic_preenabled && disable_x2apic) {
- pr_info("Skipped enabling x2apic and Interrupt-remapping "
- "because of nox2apic\n");
- return;
+ ret = dmar_table_init();
+ if (ret) {
+ pr_debug("dmar_table_init() failed with %d:\n", ret);
+ goto ir_failed;
}
- if (x2apic_preenabled && disable_x2apic)
- panic("Bios already enabled x2apic, can't enforce nox2apic");
-
- if (!x2apic_preenabled && skip_ioapic_setup) {
- pr_info("Skipped enabling x2apic and Interrupt-remapping "
- "because of skipping io-apic setup\n");
- return;
+ if (!intr_remapping_supported()) {
+ pr_debug("intr-remapping not supported\n");
+ goto ir_failed;
}
- ret = dmar_table_init();
- if (ret) {
- pr_info("dmar_table_init() failed with %d:\n", ret);
- if (x2apic_preenabled)
- panic("x2apic enabled by bios. But IR enabling failed");
- else
- pr_info("Not enabling x2apic,Intr-remapping\n");
+ if (!x2apic_preenabled && skip_ioapic_setup) {
+ pr_info("Skipped enabling intr-remap because of skipping "
+ "io-apic setup\n");
return;
}
mask_IO_APIC_setup(ioapic_entries);
mask_8259A();
- ret = enable_intr_remapping(EIM_32BIT_APIC_ID);
-
- if (ret && x2apic_preenabled) {
- local_irq_restore(flags);
- panic("x2apic enabled by bios. But IR enabling failed");
- }
-
+ ret = enable_intr_remapping(x2apic_supported());
if (ret)
goto end_restore;
- if (!x2apic) {
- x2apic = 1;
+ pr_info("Enabled Interrupt-remapping\n");
+
+ if (x2apic_supported() && !x2apic_mode) {
+ x2apic_mode = 1;
enable_x2apic();
+ pr_info("Enabled x2apic\n");
}
end_restore:
* IR enabling failed
*/
restore_IO_APIC_setup(ioapic_entries);
- else
- reinit_intr_remapped_IO_APIC(x2apic_preenabled, ioapic_entries);
unmask_8259A();
local_irq_restore(flags);
end:
- if (!ret) {
- if (!x2apic_preenabled)
- pr_info("Enabled x2apic and interrupt-remapping\n");
- else
- pr_info("Enabled Interrupt-remapping\n");
- } else
- pr_err("Failed to enable Interrupt-remapping and x2apic\n");
if (ioapic_entries)
free_ioapic_entries(ioapic_entries);
+
+ if (!ret)
+ return;
+
+ir_failed:
+ if (x2apic_preenabled)
+ panic("x2apic enabled by bios. But IR enabling failed");
+ else if (cpu_has_x2apic)
+ pr_info("Not enabling x2apic,Intr-remapping\n");
#else
if (!cpu_has_x2apic)
return;
if (x2apic_preenabled)
panic("x2apic enabled prior OS handover,"
- " enable CONFIG_INTR_REMAP");
-
- pr_info("Enable CONFIG_INTR_REMAP for enabling intr-remapping "
- " and x2apic\n");
+ " enable CONFIG_X86_X2APIC, CONFIG_INTR_REMAP");
#endif
return;
}
-#endif /* CONFIG_X86_X2APIC */
+
#ifdef CONFIG_X86_64
/*
}
mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
- boot_cpu_physical_apicid = 0;
return 0;
}
#else
*/
void __init init_apic_mappings(void)
{
- if (x2apic) {
+ unsigned int new_apicid;
+
+ if (x2apic_mode) {
boot_cpu_physical_apicid = read_apic_id();
return;
}
- /*
- * If no local APIC can be found then set up a fake all
- * zeroes page to simulate the local APIC and another
- * one for the IO-APIC.
- */
+ /* If no local APIC can be found return early */
if (!smp_found_config && detect_init_APIC()) {
- apic_phys = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
- apic_phys = __pa(apic_phys);
- } else
+ /* lets NOP'ify apic operations */
+ pr_info("APIC: disable apic facility\n");
+ apic_disable();
+ } else {
apic_phys = mp_lapic_addr;
- set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
- apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n",
- APIC_BASE, apic_phys);
+ /*
+ * acpi lapic path already maps that address in
+ * acpi_register_lapic_address()
+ */
+ if (!acpi_lapic)
+ set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
+
+ apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n",
+ APIC_BASE, apic_phys);
+ }
/*
* Fetch the APIC ID of the BSP in case we have a
* default configuration (or the MP table is broken).
*/
- if (boot_cpu_physical_apicid == -1U)
- boot_cpu_physical_apicid = read_apic_id();
+ new_apicid = read_apic_id();
+ if (boot_cpu_physical_apicid != new_apicid) {
+ boot_cpu_physical_apicid = new_apicid;
+ /*
+ * yeah -- we lie about apic_version
+ * in case if apic was disabled via boot option
+ * but it's not a problem for SMP compiled kernel
+ * since smp_sanity_check is prepared for such a case
+ * and disable smp mode
+ */
+ apic_version[new_apicid] =
+ GET_APIC_VERSION(apic_read(APIC_LVR));
+ }
}
/*
*/
apic_printk(APIC_VERBOSE, "leaving PIC mode, "
"enabling APIC mode.\n");
- outb(0x70, 0x22);
- outb(0x01, 0x23);
+ imcr_pic_to_apic();
}
#endif
if (apic->enable_apic_mode)
*/
apic_printk(APIC_VERBOSE, "disabling APIC mode, "
"entering PIC mode.\n");
- outb(0x70, 0x22);
- outb(0x00, 0x23);
+ imcr_apic_to_pic();
return;
}
#endif
local_irq_save(flags);
disable_local_APIC();
-#ifdef CONFIG_INTR_REMAP
+
if (intr_remapping_enabled)
disable_intr_remapping();
-#endif
+
local_irq_restore(flags);
return 0;
}
unsigned int l, h;
unsigned long flags;
int maxlvt;
-
-#ifdef CONFIG_INTR_REMAP
- int ret;
+ int ret = 0;
struct IO_APIC_route_entry **ioapic_entries = NULL;
if (!apic_pm_state.active)
return 0;
local_irq_save(flags);
- if (x2apic) {
+ if (intr_remapping_enabled) {
ioapic_entries = alloc_ioapic_entries();
if (!ioapic_entries) {
WARN(1, "Alloc ioapic_entries in lapic resume failed.");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto restore;
}
ret = save_IO_APIC_setup(ioapic_entries);
if (ret) {
WARN(1, "Saving IO-APIC state failed: %d\n", ret);
free_ioapic_entries(ioapic_entries);
- return ret;
+ goto restore;
}
mask_IO_APIC_setup(ioapic_entries);
mask_8259A();
- enable_x2apic();
}
-#else
- if (!apic_pm_state.active)
- return 0;
- local_irq_save(flags);
- if (x2apic)
+ if (x2apic_mode)
enable_x2apic();
-#endif
-
else {
/*
* Make sure the APICBASE points to the right address
apic_write(APIC_ESR, 0);
apic_read(APIC_ESR);
-#ifdef CONFIG_INTR_REMAP
- if (intr_remapping_enabled)
- reenable_intr_remapping(EIM_32BIT_APIC_ID);
-
- if (x2apic) {
+ if (intr_remapping_enabled) {
+ reenable_intr_remapping(x2apic_mode);
unmask_8259A();
restore_IO_APIC_setup(ioapic_entries);
free_ioapic_entries(ioapic_entries);
}
-#endif
-
+restore:
local_irq_restore(flags);
-
- return 0;
+ return ret;
}
/*
#endif /* CONFIG_PM */
#ifdef CONFIG_X86_64
-/*
- * apic_is_clustered_box() -- Check if we can expect good TSC
- *
- * Thus far, the major user of this is IBM's Summit2 series:
- *
- * Clustered boxes may have unsynced TSC problems if they are
- * multi-chassis. Use available data to take a good guess.
- * If in doubt, go HPET.
- */
-__cpuinit int apic_is_clustered_box(void)
+
+static int __cpuinit apic_cluster_num(void)
{
int i, clusters, zeros;
unsigned id;
u16 *bios_cpu_apicid;
DECLARE_BITMAP(clustermap, NUM_APIC_CLUSTERS);
- /*
- * there is not this kind of box with AMD CPU yet.
- * Some AMD box with quadcore cpu and 8 sockets apicid
- * will be [4, 0x23] or [8, 0x27] could be thought to
- * vsmp box still need checking...
- */
- if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && !is_vsmp_box())
- return 0;
-
bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
bitmap_zero(clustermap, NUM_APIC_CLUSTERS);
++zeros;
}
- /* ScaleMP vSMPowered boxes have one cluster per board and TSCs are
- * not guaranteed to be synced between boards
- */
- if (is_vsmp_box() && clusters > 1)
+ return clusters;
+}
+
+static int __cpuinitdata multi_checked;
+static int __cpuinitdata multi;
+
+static int __cpuinit set_multi(const struct dmi_system_id *d)
+{
+ if (multi)
+ return 0;
+ pr_info("APIC: %s detected, Multi Chassis\n", d->ident);
+ multi = 1;
+ return 0;
+}
+
+static const __cpuinitconst struct dmi_system_id multi_dmi_table[] = {
+ {
+ .callback = set_multi,
+ .ident = "IBM System Summit2",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Summit2"),
+ },
+ },
+ {}
+};
+
+static void __cpuinit dmi_check_multi(void)
+{
+ if (multi_checked)
+ return;
+
+ dmi_check_system(multi_dmi_table);
+ multi_checked = 1;
+}
+
+/*
+ * apic_is_clustered_box() -- Check if we can expect good TSC
+ *
+ * Thus far, the major user of this is IBM's Summit2 series:
+ * Clustered boxes may have unsynced TSC problems if they are
+ * multi-chassis.
+ * Use DMI to check them
+ */
+__cpuinit int apic_is_clustered_box(void)
+{
+ dmi_check_multi();
+ if (multi)
return 1;
+ if (!is_vsmp_box())
+ return 0;
+
/*
- * If clusters > 2, then should be multi-chassis.
- * May have to revisit this when multi-core + hyperthreaded CPUs come
- * out, but AFAIK this will work even for them.
+ * ScaleMP vSMPowered boxes have one cluster per board and TSCs are
+ * not guaranteed to be synced between boards
*/
- return (clusters > 2);
+ if (apic_cluster_num() > 1)
+ return 1;
+
+ return 0;
}
#endif
static int flat_phys_pkg_id(int initial_apic_id, int index_msb)
{
- return hard_smp_processor_id() >> index_msb;
+ return initial_apic_id >> index_msb;
}
struct apic apic_flat = {
* regardless of how many processors are present (x86_64 ES7000
* is an example).
*/
- if (acpi_gbl_FADT.header.revision > FADT2_REVISION_ID &&
+ if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
(acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
printk(KERN_DEBUG "system APIC only can use physical flat");
return 1;
return gsi;
}
-static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
+static int __cpuinit wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
{
unsigned long vect = 0, psaival = 0;
#include <asm/setup.h>
#include <asm/irq_remapping.h>
#include <asm/hpet.h>
+#include <asm/hw_irq.h>
#include <asm/uv/uv_hub.h>
#include <asm/uv/uv_irq.h>
struct irq_pin_list *next;
};
-static struct irq_pin_list *get_one_free_irq_2_pin(int cpu)
+static struct irq_pin_list *get_one_free_irq_2_pin(int node)
{
struct irq_pin_list *pin;
- int node;
-
- node = cpu_to_node(cpu);
pin = kzalloc_node(sizeof(*pin), GFP_ATOMIC, node);
unsigned move_cleanup_count;
u8 vector;
u8 move_in_progress : 1;
-#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
- u8 move_desc_pending : 1;
-#endif
};
/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
return cfg;
}
-static struct irq_cfg *get_one_free_irq_cfg(int cpu)
+static struct irq_cfg *get_one_free_irq_cfg(int node)
{
struct irq_cfg *cfg;
- int node;
-
- node = cpu_to_node(cpu);
cfg = kzalloc_node(sizeof(*cfg), GFP_ATOMIC, node);
if (cfg) {
return cfg;
}
-int arch_init_chip_data(struct irq_desc *desc, int cpu)
+int arch_init_chip_data(struct irq_desc *desc, int node)
{
struct irq_cfg *cfg;
cfg = desc->chip_data;
if (!cfg) {
- desc->chip_data = get_one_free_irq_cfg(cpu);
+ desc->chip_data = get_one_free_irq_cfg(node);
if (!desc->chip_data) {
printk(KERN_ERR "can not alloc irq_cfg\n");
BUG_ON(1);
return 0;
}
-#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
-
+/* for move_irq_desc */
static void
-init_copy_irq_2_pin(struct irq_cfg *old_cfg, struct irq_cfg *cfg, int cpu)
+init_copy_irq_2_pin(struct irq_cfg *old_cfg, struct irq_cfg *cfg, int node)
{
struct irq_pin_list *old_entry, *head, *tail, *entry;
if (!old_entry)
return;
- entry = get_one_free_irq_2_pin(cpu);
+ entry = get_one_free_irq_2_pin(node);
if (!entry)
return;
tail = entry;
old_entry = old_entry->next;
while (old_entry) {
- entry = get_one_free_irq_2_pin(cpu);
+ entry = get_one_free_irq_2_pin(node);
if (!entry) {
entry = head;
while (entry) {
}
void arch_init_copy_chip_data(struct irq_desc *old_desc,
- struct irq_desc *desc, int cpu)
+ struct irq_desc *desc, int node)
{
struct irq_cfg *cfg;
struct irq_cfg *old_cfg;
- cfg = get_one_free_irq_cfg(cpu);
+ cfg = get_one_free_irq_cfg(node);
if (!cfg)
return;
memcpy(cfg, old_cfg, sizeof(struct irq_cfg));
- init_copy_irq_2_pin(old_cfg, cfg, cpu);
+ init_copy_irq_2_pin(old_cfg, cfg, node);
}
static void free_irq_cfg(struct irq_cfg *old_cfg)
old_desc->chip_data = NULL;
}
}
-
-static void
-set_extra_move_desc(struct irq_desc *desc, const struct cpumask *mask)
-{
- struct irq_cfg *cfg = desc->chip_data;
-
- if (!cfg->move_in_progress) {
- /* it means that domain is not changed */
- if (!cpumask_intersects(desc->affinity, mask))
- cfg->move_desc_pending = 1;
- }
-}
-#endif
+/* end for move_irq_desc */
#else
static struct irq_cfg *irq_cfg(unsigned int irq)
#endif
-#ifndef CONFIG_NUMA_MIGRATE_IRQ_DESC
-static inline void
-set_extra_move_desc(struct irq_desc *desc, const struct cpumask *mask)
-{
-}
-#endif
-
struct io_apic {
unsigned int index;
unsigned int unused[3];
spin_unlock_irqrestore(&ioapic_lock, flags);
}
-#ifdef CONFIG_SMP
-static void send_cleanup_vector(struct irq_cfg *cfg)
-{
- cpumask_var_t cleanup_mask;
-
- if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) {
- unsigned int i;
- cfg->move_cleanup_count = 0;
- for_each_cpu_and(i, cfg->old_domain, cpu_online_mask)
- cfg->move_cleanup_count++;
- for_each_cpu_and(i, cfg->old_domain, cpu_online_mask)
- apic->send_IPI_mask(cpumask_of(i), IRQ_MOVE_CLEANUP_VECTOR);
- } else {
- cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask);
- cfg->move_cleanup_count = cpumask_weight(cleanup_mask);
- apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
- free_cpumask_var(cleanup_mask);
- }
- cfg->move_in_progress = 0;
-}
-
-static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg)
-{
- int apic, pin;
- struct irq_pin_list *entry;
- u8 vector = cfg->vector;
-
- entry = cfg->irq_2_pin;
- for (;;) {
- unsigned int reg;
-
- if (!entry)
- break;
-
- apic = entry->apic;
- pin = entry->pin;
- /*
- * With interrupt-remapping, destination information comes
- * from interrupt-remapping table entry.
- */
- if (!irq_remapped(irq))
- io_apic_write(apic, 0x11 + pin*2, dest);
- reg = io_apic_read(apic, 0x10 + pin*2);
- reg &= ~IO_APIC_REDIR_VECTOR_MASK;
- reg |= vector;
- io_apic_modify(apic, 0x10 + pin*2, reg);
- if (!entry->next)
- break;
- entry = entry->next;
- }
-}
-
-static int
-assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask);
-
-/*
- * Either sets desc->affinity to a valid value, and returns
- * ->cpu_mask_to_apicid of that, or returns BAD_APICID and
- * leaves desc->affinity untouched.
- */
-static unsigned int
-set_desc_affinity(struct irq_desc *desc, const struct cpumask *mask)
-{
- struct irq_cfg *cfg;
- unsigned int irq;
-
- if (!cpumask_intersects(mask, cpu_online_mask))
- return BAD_APICID;
-
- irq = desc->irq;
- cfg = desc->chip_data;
- if (assign_irq_vector(irq, cfg, mask))
- return BAD_APICID;
-
- /* check that before desc->addinity get updated */
- set_extra_move_desc(desc, mask);
-
- cpumask_copy(desc->affinity, mask);
-
- return apic->cpu_mask_to_apicid_and(desc->affinity, cfg->domain);
-}
-
-static void
-set_ioapic_affinity_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
-{
- struct irq_cfg *cfg;
- unsigned long flags;
- unsigned int dest;
- unsigned int irq;
-
- irq = desc->irq;
- cfg = desc->chip_data;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- dest = set_desc_affinity(desc, mask);
- if (dest != BAD_APICID) {
- /* Only the high 8 bits are valid. */
- dest = SET_APIC_LOGICAL_ID(dest);
- __target_IO_APIC_irq(irq, dest, cfg);
- }
- spin_unlock_irqrestore(&ioapic_lock, flags);
-}
-
-static void
-set_ioapic_affinity_irq(unsigned int irq, const struct cpumask *mask)
-{
- struct irq_desc *desc;
-
- desc = irq_to_desc(irq);
-
- set_ioapic_affinity_irq_desc(desc, mask);
-}
-#endif /* CONFIG_SMP */
-
/*
* The common case is 1:1 IRQ<->pin mappings. Sometimes there are
* shared ISA-space IRQs, so we have to support them. We are super
* fast in the common case, and fast for shared ISA-space IRQs.
*/
-static void add_pin_to_irq_cpu(struct irq_cfg *cfg, int cpu, int apic, int pin)
+static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin)
{
struct irq_pin_list *entry;
entry = cfg->irq_2_pin;
if (!entry) {
- entry = get_one_free_irq_2_pin(cpu);
+ entry = get_one_free_irq_2_pin(node);
if (!entry) {
printk(KERN_ERR "can not alloc irq_2_pin to add %d - %d\n",
apic, pin);
entry = entry->next;
}
- entry->next = get_one_free_irq_2_pin(cpu);
+ entry->next = get_one_free_irq_2_pin(node);
entry = entry->next;
entry->apic = apic;
entry->pin = pin;
/*
* Reroute an IRQ to a different pin.
*/
-static void __init replace_pin_at_irq_cpu(struct irq_cfg *cfg, int cpu,
+static void __init replace_pin_at_irq_node(struct irq_cfg *cfg, int node,
int oldapic, int oldpin,
int newapic, int newpin)
{
/* why? call replace before add? */
if (!replaced)
- add_pin_to_irq_cpu(cfg, cpu, newapic, newpin);
+ add_pin_to_irq_node(cfg, node, newapic, newpin);
}
static inline void io_apic_modify_irq(struct irq_cfg *cfg,
__setup("pirq=", ioapic_pirq_setup);
#endif /* CONFIG_X86_32 */
-#ifdef CONFIG_INTR_REMAP
struct IO_APIC_route_entry **alloc_ioapic_entries(void)
{
int apic;
return 0;
}
-void reinit_intr_remapped_IO_APIC(int intr_remapping,
- struct IO_APIC_route_entry **ioapic_entries)
-
-{
- /*
- * for now plain restore of previous settings.
- * TBD: In the case of OS enabling interrupt-remapping,
- * IO-APIC RTE's need to be setup to point to interrupt-remapping
- * table entries. for now, do a plain restore, and wait for
- * the setup_IO_APIC_irqs() to do proper initialization.
- */
- restore_IO_APIC_setup(ioapic_entries);
-}
-
void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries)
{
int apic;
kfree(ioapic_entries);
}
-#endif
/*
* Find the IRQ entry number of a certain pin.
return -1;
}
-/*
- * Find a specific PCI IRQ entry.
- * Not an __init, possibly needed by modules
- */
-static int pin_2_irq(int idx, int apic, int pin);
-
-int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
-{
- int apic, i, best_guess = -1;
-
- apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n",
- bus, slot, pin);
- if (test_bit(bus, mp_bus_not_pci)) {
- apic_printk(APIC_VERBOSE, "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
- return -1;
- }
- for (i = 0; i < mp_irq_entries; i++) {
- int lbus = mp_irqs[i].srcbus;
-
- for (apic = 0; apic < nr_ioapics; apic++)
- if (mp_ioapics[apic].apicid == mp_irqs[i].dstapic ||
- mp_irqs[i].dstapic == MP_APIC_ALL)
- break;
-
- if (!test_bit(lbus, mp_bus_not_pci) &&
- !mp_irqs[i].irqtype &&
- (bus == lbus) &&
- (slot == ((mp_irqs[i].srcbusirq >> 2) & 0x1f))) {
- int irq = pin_2_irq(i, apic, mp_irqs[i].dstirq);
-
- if (!(apic || IO_APIC_IRQ(irq)))
- continue;
-
- if (pin == (mp_irqs[i].srcbusirq & 3))
- return irq;
- /*
- * Use the first all-but-pin matching entry as a
- * best-guess fuzzy result for broken mptables.
- */
- if (best_guess < 0)
- best_guess = irq;
- }
- }
- return best_guess;
-}
-
-EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
-
#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
/*
* EISA Edge/Level control register, ELCR
return irq;
}
+/*
+ * Find a specific PCI IRQ entry.
+ * Not an __init, possibly needed by modules
+ */
+int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin,
+ struct io_apic_irq_attr *irq_attr)
+{
+ int apic, i, best_guess = -1;
+
+ apic_printk(APIC_DEBUG,
+ "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n",
+ bus, slot, pin);
+ if (test_bit(bus, mp_bus_not_pci)) {
+ apic_printk(APIC_VERBOSE,
+ "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
+ return -1;
+ }
+ for (i = 0; i < mp_irq_entries; i++) {
+ int lbus = mp_irqs[i].srcbus;
+
+ for (apic = 0; apic < nr_ioapics; apic++)
+ if (mp_ioapics[apic].apicid == mp_irqs[i].dstapic ||
+ mp_irqs[i].dstapic == MP_APIC_ALL)
+ break;
+
+ if (!test_bit(lbus, mp_bus_not_pci) &&
+ !mp_irqs[i].irqtype &&
+ (bus == lbus) &&
+ (slot == ((mp_irqs[i].srcbusirq >> 2) & 0x1f))) {
+ int irq = pin_2_irq(i, apic, mp_irqs[i].dstirq);
+
+ if (!(apic || IO_APIC_IRQ(irq)))
+ continue;
+
+ if (pin == (mp_irqs[i].srcbusirq & 3)) {
+ set_io_apic_irq_attr(irq_attr, apic,
+ mp_irqs[i].dstirq,
+ irq_trigger(i),
+ irq_polarity(i));
+ return irq;
+ }
+ /*
+ * Use the first all-but-pin matching entry as a
+ * best-guess fuzzy result for broken mptables.
+ */
+ if (best_guess < 0) {
+ set_io_apic_irq_attr(irq_attr, apic,
+ mp_irqs[i].dstirq,
+ irq_trigger(i),
+ irq_polarity(i));
+ best_guess = irq;
+ }
+ }
+ }
+ return best_guess;
+}
+EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
+
void lock_vector_lock(void)
{
/* Used to the online set of cpus does not change
ioapic_write_entry(apic_id, pin, entry);
}
+static struct {
+ DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
+} mp_ioapic_routing[MAX_IO_APICS];
+
static void __init setup_IO_APIC_irqs(void)
{
- int apic_id, pin, idx, irq;
+ int apic_id = 0, pin, idx, irq;
int notcon = 0;
struct irq_desc *desc;
struct irq_cfg *cfg;
- int cpu = boot_cpu_id;
+ int node = cpu_to_node(boot_cpu_id);
apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
- for (apic_id = 0; apic_id < nr_ioapics; apic_id++) {
- for (pin = 0; pin < nr_ioapic_registers[apic_id]; pin++) {
-
- idx = find_irq_entry(apic_id, pin, mp_INT);
- if (idx == -1) {
- if (!notcon) {
- notcon = 1;
- apic_printk(APIC_VERBOSE,
- KERN_DEBUG " %d-%d",
- mp_ioapics[apic_id].apicid, pin);
- } else
- apic_printk(APIC_VERBOSE, " %d-%d",
- mp_ioapics[apic_id].apicid, pin);
- continue;
- }
- if (notcon) {
- apic_printk(APIC_VERBOSE,
- " (apicid-pin) not connected\n");
- notcon = 0;
- }
+#ifdef CONFIG_ACPI
+ if (!acpi_disabled && acpi_ioapic) {
+ apic_id = mp_find_ioapic(0);
+ if (apic_id < 0)
+ apic_id = 0;
+ }
+#endif
- irq = pin_2_irq(idx, apic_id, pin);
+ for (pin = 0; pin < nr_ioapic_registers[apic_id]; pin++) {
+ idx = find_irq_entry(apic_id, pin, mp_INT);
+ if (idx == -1) {
+ if (!notcon) {
+ notcon = 1;
+ apic_printk(APIC_VERBOSE,
+ KERN_DEBUG " %d-%d",
+ mp_ioapics[apic_id].apicid, pin);
+ } else
+ apic_printk(APIC_VERBOSE, " %d-%d",
+ mp_ioapics[apic_id].apicid, pin);
+ continue;
+ }
+ if (notcon) {
+ apic_printk(APIC_VERBOSE,
+ " (apicid-pin) not connected\n");
+ notcon = 0;
+ }
- /*
- * Skip the timer IRQ if there's a quirk handler
- * installed and if it returns 1:
- */
- if (apic->multi_timer_check &&
- apic->multi_timer_check(apic_id, irq))
- continue;
+ irq = pin_2_irq(idx, apic_id, pin);
- desc = irq_to_desc_alloc_cpu(irq, cpu);
- if (!desc) {
- printk(KERN_INFO "can not get irq_desc for %d\n", irq);
- continue;
- }
- cfg = desc->chip_data;
- add_pin_to_irq_cpu(cfg, cpu, apic_id, pin);
+ /*
+ * Skip the timer IRQ if there's a quirk handler
+ * installed and if it returns 1:
+ */
+ if (apic->multi_timer_check &&
+ apic->multi_timer_check(apic_id, irq))
+ continue;
- setup_IO_APIC_irq(apic_id, pin, irq, desc,
- irq_trigger(idx), irq_polarity(idx));
+ desc = irq_to_desc_alloc_node(irq, node);
+ if (!desc) {
+ printk(KERN_INFO "can not get irq_desc for %d\n", irq);
+ continue;
}
+ cfg = desc->chip_data;
+ add_pin_to_irq_node(cfg, node, apic_id, pin);
+ /*
+ * don't mark it in pin_programmed, so later acpi could
+ * set it correctly when irq < 16
+ */
+ setup_IO_APIC_irq(apic_id, pin, irq, desc,
+ irq_trigger(idx), irq_polarity(idx));
}
if (notcon)
__apicdebuginit(void) print_local_APIC(void *dummy)
{
- unsigned int v, ver, maxlvt;
+ unsigned int i, v, ver, maxlvt;
u64 icr;
if (apic_verbosity == APIC_QUIET)
printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v);
v = apic_read(APIC_TDCR);
printk(KERN_DEBUG "... APIC TDCR: %08x\n", v);
+
+ if (boot_cpu_has(X86_FEATURE_EXTAPIC)) {
+ v = apic_read(APIC_EFEAT);
+ maxlvt = (v >> 16) & 0xff;
+ printk(KERN_DEBUG "... APIC EFEAT: %08x\n", v);
+ v = apic_read(APIC_ECTRL);
+ printk(KERN_DEBUG "... APIC ECTRL: %08x\n", v);
+ for (i = 0; i < maxlvt; i++) {
+ v = apic_read(APIC_EILVTn(i));
+ printk(KERN_DEBUG "... APIC EILVT%d: %08x\n", i, v);
+ }
+ }
printk("\n");
}
__apicdebuginit(int) print_all_ICs(void)
{
print_PIC();
+
+ /* don't print out if apic is not there */
+ if (!cpu_has_apic || disable_apic)
+ return 0;
+
print_all_local_APICs();
print_IO_APIC();
*/
#ifdef CONFIG_SMP
+static void send_cleanup_vector(struct irq_cfg *cfg)
+{
+ cpumask_var_t cleanup_mask;
+
+ if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) {
+ unsigned int i;
+ cfg->move_cleanup_count = 0;
+ for_each_cpu_and(i, cfg->old_domain, cpu_online_mask)
+ cfg->move_cleanup_count++;
+ for_each_cpu_and(i, cfg->old_domain, cpu_online_mask)
+ apic->send_IPI_mask(cpumask_of(i), IRQ_MOVE_CLEANUP_VECTOR);
+ } else {
+ cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask);
+ cfg->move_cleanup_count = cpumask_weight(cleanup_mask);
+ apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
+ free_cpumask_var(cleanup_mask);
+ }
+ cfg->move_in_progress = 0;
+}
+
+static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg)
+{
+ int apic, pin;
+ struct irq_pin_list *entry;
+ u8 vector = cfg->vector;
+
+ entry = cfg->irq_2_pin;
+ for (;;) {
+ unsigned int reg;
+
+ if (!entry)
+ break;
+
+ apic = entry->apic;
+ pin = entry->pin;
+ /*
+ * With interrupt-remapping, destination information comes
+ * from interrupt-remapping table entry.
+ */
+ if (!irq_remapped(irq))
+ io_apic_write(apic, 0x11 + pin*2, dest);
+ reg = io_apic_read(apic, 0x10 + pin*2);
+ reg &= ~IO_APIC_REDIR_VECTOR_MASK;
+ reg |= vector;
+ io_apic_modify(apic, 0x10 + pin*2, reg);
+ if (!entry->next)
+ break;
+ entry = entry->next;
+ }
+}
+
+static int
+assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask);
+
+/*
+ * Either sets desc->affinity to a valid value, and returns
+ * ->cpu_mask_to_apicid of that, or returns BAD_APICID and
+ * leaves desc->affinity untouched.
+ */
+static unsigned int
+set_desc_affinity(struct irq_desc *desc, const struct cpumask *mask)
+{
+ struct irq_cfg *cfg;
+ unsigned int irq;
+
+ if (!cpumask_intersects(mask, cpu_online_mask))
+ return BAD_APICID;
+
+ irq = desc->irq;
+ cfg = desc->chip_data;
+ if (assign_irq_vector(irq, cfg, mask))
+ return BAD_APICID;
+
+ cpumask_copy(desc->affinity, mask);
+
+ return apic->cpu_mask_to_apicid_and(desc->affinity, cfg->domain);
+}
+
+static int
+set_ioapic_affinity_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
+{
+ struct irq_cfg *cfg;
+ unsigned long flags;
+ unsigned int dest;
+ unsigned int irq;
+ int ret = -1;
+
+ irq = desc->irq;
+ cfg = desc->chip_data;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ dest = set_desc_affinity(desc, mask);
+ if (dest != BAD_APICID) {
+ /* Only the high 8 bits are valid. */
+ dest = SET_APIC_LOGICAL_ID(dest);
+ __target_IO_APIC_irq(irq, dest, cfg);
+ ret = 0;
+ }
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ return ret;
+}
+
+static int
+set_ioapic_affinity_irq(unsigned int irq, const struct cpumask *mask)
+{
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+
+ return set_ioapic_affinity_irq_desc(desc, mask);
+}
+
+#ifdef CONFIG_INTR_REMAP
-#ifdef CONFIG_INTR_REMAP
-
/*
* Migrate the IO-APIC irq in the presence of intr-remapping.
*
* Real vector that is used for interrupting cpu will be coming from
* the interrupt-remapping table entry.
*/
-static void
+static int
migrate_ioapic_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
{
struct irq_cfg *cfg;
struct irte irte;
unsigned int dest;
unsigned int irq;
+ int ret = -1;
if (!cpumask_intersects(mask, cpu_online_mask))
- return;
+ return ret;
irq = desc->irq;
if (get_irte(irq, &irte))
- return;
+ return ret;
cfg = desc->chip_data;
if (assign_irq_vector(irq, cfg, mask))
- return;
-
- set_extra_move_desc(desc, mask);
+ return ret;
dest = apic->cpu_mask_to_apicid_and(cfg->domain, mask);
send_cleanup_vector(cfg);
cpumask_copy(desc->affinity, mask);
+
+ return 0;
}
/*
* Migrates the IRQ destination in the process context.
*/
-static void set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
+static int set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
const struct cpumask *mask)
{
- migrate_ioapic_irq_desc(desc, mask);
+ return migrate_ioapic_irq_desc(desc, mask);
}
-static void set_ir_ioapic_affinity_irq(unsigned int irq,
+static int set_ir_ioapic_affinity_irq(unsigned int irq,
const struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
- set_ir_ioapic_affinity_irq_desc(desc, mask);
+ return set_ir_ioapic_affinity_irq_desc(desc, mask);
}
#else
-static inline void set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
+static inline int set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
const struct cpumask *mask)
{
+ return 0;
}
#endif
struct irq_cfg *cfg = desc->chip_data;
unsigned vector, me;
- if (likely(!cfg->move_in_progress)) {
-#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
- if (likely(!cfg->move_desc_pending))
- return;
-
- /* domain has not changed, but affinity did */
- me = smp_processor_id();
- if (cpumask_test_cpu(me, desc->affinity)) {
- *descp = desc = move_irq_desc(desc, me);
- /* get the new one */
- cfg = desc->chip_data;
- cfg->move_desc_pending = 0;
- }
-#endif
+ if (likely(!cfg->move_in_progress))
return;
- }
vector = ~get_irq_regs()->orig_ax;
me = smp_processor_id();
- if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) {
-#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
- *descp = desc = move_irq_desc(desc, me);
- /* get the new one */
- cfg = desc->chip_data;
-#endif
+ if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
send_cleanup_vector(cfg);
- }
}
#else
static inline void irq_complete_move(struct irq_desc **descp) {}
#endif
-static void __eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg)
-{
- int apic, pin;
- struct irq_pin_list *entry;
-
- entry = cfg->irq_2_pin;
- for (;;) {
-
- if (!entry)
- break;
-
- apic = entry->apic;
- pin = entry->pin;
- io_apic_eoi(apic, pin);
- entry = entry->next;
- }
-}
-
-static void
-eoi_ioapic_irq(struct irq_desc *desc)
-{
- struct irq_cfg *cfg;
- unsigned long flags;
- unsigned int irq;
-
- irq = desc->irq;
- cfg = desc->chip_data;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- __eoi_ioapic_irq(irq, cfg);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-}
-
-#ifdef CONFIG_X86_X2APIC
-static void ack_x2apic_level(unsigned int irq)
-{
- struct irq_desc *desc = irq_to_desc(irq);
- ack_x2APIC_irq();
- eoi_ioapic_irq(desc);
-}
-
-static void ack_x2apic_edge(unsigned int irq)
-{
- ack_x2APIC_irq();
-}
-#endif
-
static void ack_apic_edge(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
*/
ack_APIC_irq();
- if (irq_remapped(irq))
- eoi_ioapic_irq(desc);
-
/* Now we can move and renable the irq */
if (unlikely(do_unmask_irq)) {
/* Only migrate the irq if the ack has been received.
}
#ifdef CONFIG_INTR_REMAP
+static void __eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg)
+{
+ int apic, pin;
+ struct irq_pin_list *entry;
+
+ entry = cfg->irq_2_pin;
+ for (;;) {
+
+ if (!entry)
+ break;
+
+ apic = entry->apic;
+ pin = entry->pin;
+ io_apic_eoi(apic, pin);
+ entry = entry->next;
+ }
+}
+
+static void
+eoi_ioapic_irq(struct irq_desc *desc)
+{
+ struct irq_cfg *cfg;
+ unsigned long flags;
+ unsigned int irq;
+
+ irq = desc->irq;
+ cfg = desc->chip_data;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ __eoi_ioapic_irq(irq, cfg);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+}
+
static void ir_ack_apic_edge(unsigned int irq)
{
-#ifdef CONFIG_X86_X2APIC
- if (x2apic_enabled())
- return ack_x2apic_edge(irq);
-#endif
- return ack_apic_edge(irq);
+ ack_APIC_irq();
}
static void ir_ack_apic_level(unsigned int irq)
{
-#ifdef CONFIG_X86_X2APIC
- if (x2apic_enabled())
- return ack_x2apic_level(irq);
-#endif
- return ack_apic_level(irq);
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ ack_APIC_irq();
+ eoi_ioapic_irq(desc);
}
#endif /* CONFIG_INTR_REMAP */
{
struct irq_desc *desc = irq_to_desc(0);
struct irq_cfg *cfg = desc->chip_data;
- int cpu = boot_cpu_id;
+ int node = cpu_to_node(boot_cpu_id);
int apic1, pin1, apic2, pin2;
unsigned long flags;
int no_pin1 = 0;
* Ok, does IRQ0 through the IOAPIC work?
*/
if (no_pin1) {
- add_pin_to_irq_cpu(cfg, cpu, apic1, pin1);
+ add_pin_to_irq_node(cfg, node, apic1, pin1);
setup_timer_IRQ0_pin(apic1, pin1, cfg->vector);
} else {
/* for edge trigger, setup_IO_APIC_irq already
/*
* legacy devices should be connected to IO APIC #0
*/
- replace_pin_at_irq_cpu(cfg, cpu, apic1, pin1, apic2, pin2);
+ replace_pin_at_irq_node(cfg, node, apic1, pin1, apic2, pin2);
setup_timer_IRQ0_pin(apic2, pin2, cfg->vector);
enable_8259A_irq(0);
if (timer_irq_works()) {
/*
* Dynamic irq allocate and deallocation
*/
-unsigned int create_irq_nr(unsigned int irq_want)
+unsigned int create_irq_nr(unsigned int irq_want, int node)
{
/* Allocate an unused irq */
unsigned int irq;
unsigned int new;
unsigned long flags;
struct irq_cfg *cfg_new = NULL;
- int cpu = boot_cpu_id;
struct irq_desc *desc_new = NULL;
irq = 0;
spin_lock_irqsave(&vector_lock, flags);
for (new = irq_want; new < nr_irqs; new++) {
- desc_new = irq_to_desc_alloc_cpu(new, cpu);
+ desc_new = irq_to_desc_alloc_node(new, node);
if (!desc_new) {
printk(KERN_INFO "can not get irq_desc for %d\n", new);
continue;
if (cfg_new->vector != 0)
continue;
+
+ desc_new = move_irq_desc(desc_new, node);
+
if (__assign_irq_vector(new, cfg_new, apic->target_cpus()) == 0)
irq = new;
break;
int create_irq(void)
{
+ int node = cpu_to_node(boot_cpu_id);
unsigned int irq_want;
int irq;
irq_want = nr_irqs_gsi;
- irq = create_irq_nr(irq_want);
+ irq = create_irq_nr(irq_want, node);
if (irq == 0)
irq = -1;
}
#ifdef CONFIG_SMP
-static void set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
+static int set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_cfg *cfg;
dest = set_desc_affinity(desc, mask);
if (dest == BAD_APICID)
- return;
+ return -1;
cfg = desc->chip_data;
msg.address_lo |= MSI_ADDR_DEST_ID(dest);
write_msi_msg_desc(desc, &msg);
+
+ return 0;
}
#ifdef CONFIG_INTR_REMAP
/*
* Migrate the MSI irq to another cpumask. This migration is
* done in the process context using interrupt-remapping hardware.
*/
-static void
+static int
ir_set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irte irte;
if (get_irte(irq, &irte))
- return;
+ return -1;
dest = set_desc_affinity(desc, mask);
if (dest == BAD_APICID)
- return;
+ return -1;
irte.vector = cfg->vector;
irte.dest_id = IRTE_DEST(dest);
*/
if (cfg->move_in_progress)
send_cleanup_vector(cfg);
+
+ return 0;
}
#endif
unsigned int irq_want;
struct intel_iommu *iommu = NULL;
int index = 0;
+ int node;
/* x86 doesn't support multiple MSI yet */
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
+ node = dev_to_node(&dev->dev);
irq_want = nr_irqs_gsi;
sub_handle = 0;
list_for_each_entry(msidesc, &dev->msi_list, list) {
- irq = create_irq_nr(irq_want);
+ irq = create_irq_nr(irq_want, node);
if (irq == 0)
return -1;
irq_want = irq + 1;
#if defined (CONFIG_DMAR) || defined (CONFIG_INTR_REMAP)
#ifdef CONFIG_SMP
-static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_cfg *cfg;
dest = set_desc_affinity(desc, mask);
if (dest == BAD_APICID)
- return;
+ return -1;
cfg = desc->chip_data;
msg.address_lo |= MSI_ADDR_DEST_ID(dest);
dmar_msi_write(irq, &msg);
+
+ return 0;
}
#endif /* CONFIG_SMP */
#ifdef CONFIG_HPET_TIMER
#ifdef CONFIG_SMP
-static void hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_cfg *cfg;
dest = set_desc_affinity(desc, mask);
if (dest == BAD_APICID)
- return;
+ return -1;
cfg = desc->chip_data;
msg.address_lo |= MSI_ADDR_DEST_ID(dest);
hpet_msi_write(irq, &msg);
+
+ return 0;
}
#endif /* CONFIG_SMP */
write_ht_irq_msg(irq, &msg);
}
-static void set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask)
+static int set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_cfg *cfg;
dest = set_desc_affinity(desc, mask);
if (dest == BAD_APICID)
- return;
+ return -1;
cfg = desc->chip_data;
target_ht_irq(irq, dest, cfg->vector);
+
+ return 0;
}
#endif
unsigned long flags;
int err;
+ BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long));
+
cfg = irq_cfg(irq);
err = assign_irq_vector(irq, cfg, eligible_cpu);
mmr_value = 0;
entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
- BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long));
-
- entry->vector = cfg->vector;
- entry->delivery_mode = apic->irq_delivery_mode;
- entry->dest_mode = apic->irq_dest_mode;
- entry->polarity = 0;
- entry->trigger = 0;
- entry->mask = 0;
- entry->dest = apic->cpu_mask_to_apicid(eligible_cpu);
+ entry->vector = cfg->vector;
+ entry->delivery_mode = apic->irq_delivery_mode;
+ entry->dest_mode = apic->irq_dest_mode;
+ entry->polarity = 0;
+ entry->trigger = 0;
+ entry->mask = 0;
+ entry->dest = apic->cpu_mask_to_apicid(eligible_cpu);
mmr_pnode = uv_blade_to_pnode(mmr_blade);
uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
struct uv_IO_APIC_route_entry *entry;
int mmr_pnode;
+ BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long));
+
mmr_value = 0;
entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
- BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long));
-
entry->mask = 1;
mmr_pnode = uv_blade_to_pnode(mmr_blade);
}
#endif
+static int __io_apic_set_pci_routing(struct device *dev, int irq,
+ struct io_apic_irq_attr *irq_attr)
+{
+ struct irq_desc *desc;
+ struct irq_cfg *cfg;
+ int node;
+ int ioapic, pin;
+ int trigger, polarity;
+
+ ioapic = irq_attr->ioapic;
+ if (!IO_APIC_IRQ(irq)) {
+ apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
+ ioapic);
+ return -EINVAL;
+ }
+
+ if (dev)
+ node = dev_to_node(dev);
+ else
+ node = cpu_to_node(boot_cpu_id);
+
+ desc = irq_to_desc_alloc_node(irq, node);
+ if (!desc) {
+ printk(KERN_INFO "can not get irq_desc %d\n", irq);
+ return 0;
+ }
+
+ pin = irq_attr->ioapic_pin;
+ trigger = irq_attr->trigger;
+ polarity = irq_attr->polarity;
+
+ /*
+ * IRQs < 16 are already in the irq_2_pin[] map
+ */
+ if (irq >= NR_IRQS_LEGACY) {
+ cfg = desc->chip_data;
+ add_pin_to_irq_node(cfg, node, ioapic, pin);
+ }
+
+ setup_IO_APIC_irq(ioapic, pin, irq, desc, trigger, polarity);
+
+ return 0;
+}
+
+int io_apic_set_pci_routing(struct device *dev, int irq,
+ struct io_apic_irq_attr *irq_attr)
+{
+ int ioapic, pin;
+ /*
+ * Avoid pin reprogramming. PRTs typically include entries
+ * with redundant pin->gsi mappings (but unique PCI devices);
+ * we only program the IOAPIC on the first.
+ */
+ ioapic = irq_attr->ioapic;
+ pin = irq_attr->ioapic_pin;
+ if (test_bit(pin, mp_ioapic_routing[ioapic].pin_programmed)) {
+ pr_debug("Pin %d-%d already programmed\n",
+ mp_ioapics[ioapic].apicid, pin);
+ return 0;
+ }
+ set_bit(pin, mp_ioapic_routing[ioapic].pin_programmed);
+
+ return __io_apic_set_pci_routing(dev, irq, irq_attr);
+}
+
/* --------------------------------------------------------------------------
ACPI-based IOAPIC Configuration
-------------------------------------------------------------------------- */
return apic_id;
}
+#endif
int __init io_apic_get_version(int ioapic)
{
return reg_01.bits.version;
}
-#endif
-
-int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int polarity)
-{
- struct irq_desc *desc;
- struct irq_cfg *cfg;
- int cpu = boot_cpu_id;
-
- if (!IO_APIC_IRQ(irq)) {
- apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
- ioapic);
- return -EINVAL;
- }
-
- desc = irq_to_desc_alloc_cpu(irq, cpu);
- if (!desc) {
- printk(KERN_INFO "can not get irq_desc %d\n", irq);
- return 0;
- }
-
- /*
- * IRQs < 16 are already in the irq_2_pin[] map
- */
- if (irq >= NR_IRQS_LEGACY) {
- cfg = desc->chip_data;
- add_pin_to_irq_cpu(cfg, cpu, ioapic, pin);
- }
-
- setup_IO_APIC_irq(ioapic, pin, irq, desc, triggering, polarity);
-
- return 0;
-}
-
int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
{
#ifdef CONFIG_SMP
void __init setup_ioapic_dest(void)
{
- int pin, ioapic, irq, irq_entry;
+ int pin, ioapic = 0, irq, irq_entry;
struct irq_desc *desc;
- struct irq_cfg *cfg;
const struct cpumask *mask;
if (skip_ioapic_setup == 1)
return;
- for (ioapic = 0; ioapic < nr_ioapics; ioapic++) {
- for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) {
- irq_entry = find_irq_entry(ioapic, pin, mp_INT);
- if (irq_entry == -1)
- continue;
- irq = pin_2_irq(irq_entry, ioapic, pin);
-
- /* setup_IO_APIC_irqs could fail to get vector for some device
- * when you have too many devices, because at that time only boot
- * cpu is online.
- */
- desc = irq_to_desc(irq);
- cfg = desc->chip_data;
- if (!cfg->vector) {
- setup_IO_APIC_irq(ioapic, pin, irq, desc,
- irq_trigger(irq_entry),
- irq_polarity(irq_entry));
- continue;
+#ifdef CONFIG_ACPI
+ if (!acpi_disabled && acpi_ioapic) {
+ ioapic = mp_find_ioapic(0);
+ if (ioapic < 0)
+ ioapic = 0;
+ }
+#endif
- }
+ for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) {
+ irq_entry = find_irq_entry(ioapic, pin, mp_INT);
+ if (irq_entry == -1)
+ continue;
+ irq = pin_2_irq(irq_entry, ioapic, pin);
- /*
- * Honour affinities which have been set in early boot
- */
- if (desc->status &
- (IRQ_NO_BALANCING | IRQ_AFFINITY_SET))
- mask = desc->affinity;
- else
- mask = apic->target_cpus();
+ desc = irq_to_desc(irq);
- if (intr_remapping_enabled)
- set_ir_ioapic_affinity_irq_desc(desc, mask);
- else
- set_ioapic_affinity_irq_desc(desc, mask);
- }
+ /*
+ * Honour affinities which have been set in early boot
+ */
+ if (desc->status &
+ (IRQ_NO_BALANCING | IRQ_AFFINITY_SET))
+ mask = desc->affinity;
+ else
+ mask = apic->target_cpus();
+ if (intr_remapping_enabled)
+ set_ir_ioapic_affinity_irq_desc(desc, mask);
+ else
+ set_ioapic_affinity_irq_desc(desc, mask);
}
+
}
#endif
}
#endif
-static void report_broken_nmi(int cpu, int *prev_nmi_count)
+static void report_broken_nmi(int cpu, unsigned int *prev_nmi_count)
{
printk(KERN_CONT "\n");
extern struct apic apic_bigsmp;
extern struct apic apic_es7000;
extern struct apic apic_es7000_cluster;
-extern struct apic apic_default;
struct apic *apic = &apic_default;
EXPORT_SYMBOL_GPL(apic);
void __init default_setup_apic_routing(void)
{
#ifdef CONFIG_X86_X2APIC
- if (x2apic && (apic != &apic_x2apic_phys &&
+ if (x2apic_mode && (apic != &apic_x2apic_phys &&
#ifdef CONFIG_X86_UV
apic != &apic_x2apic_uv_x &&
#endif
rio->type == LookOutAWPEG || rio->type == LookOutBWPEG);
}
-
-/* In clustered mode, the high nibble of APIC ID is a cluster number.
- * The low nibble is a 4-bit bitmap. */
-#define XAPIC_DEST_CPUS_SHIFT 4
-#define XAPIC_DEST_CPUS_MASK ((1u << XAPIC_DEST_CPUS_SHIFT) - 1)
-#define XAPIC_DEST_CLUSTER_MASK (XAPIC_DEST_CPUS_MASK << XAPIC_DEST_CPUS_SHIFT)
-
#define SUMMIT_APIC_DFR_VALUE (APIC_DFR_CLUSTER)
static const struct cpumask *summit_target_cpus(void)
#include <asm/apic.h>
#include <asm/ipi.h>
-DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid);
+static DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid);
static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
cpumask_set_cpu(cpu, retmask);
}
-static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
+static int __cpuinit uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
{
#ifdef CONFIG_SMP
unsigned long val;
union uvh_node_id_u node_id;
unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
- int max_pnode = 0;
+ int gnode_extra, max_pnode = 0;
unsigned long mmr_base, present, paddr;
unsigned short pnode_mask;
mmr_base =
uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
~UV_MMR_ENABLE;
+ pnode_mask = (1 << n_val) - 1;
+ node_id.v = uv_read_local_mmr(UVH_NODE_ID);
+ gnode_extra = (node_id.s.node_id & ~((1 << n_val) - 1)) >> 1;
+ gnode_upper = ((unsigned long)gnode_extra << m_val);
+ printk(KERN_DEBUG "UV: N %d, M %d, gnode_upper 0x%lx, gnode_extra 0x%x\n",
+ n_val, m_val, gnode_upper, gnode_extra);
+
printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
uv_blade_info = kmalloc(bytes, GFP_KERNEL);
+ BUG_ON(!uv_blade_info);
get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
+ BUG_ON(!uv_node_to_blade);
memset(uv_node_to_blade, 255, bytes);
bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
+ BUG_ON(!uv_cpu_to_blade);
memset(uv_cpu_to_blade, 255, bytes);
blade = 0;
}
}
- pnode_mask = (1 << n_val) - 1;
- node_id.v = uv_read_local_mmr(UVH_NODE_ID);
- gnode_upper = (((unsigned long)node_id.s.node_id) &
- ~((1 << n_val) - 1)) << m_val;
-
uv_bios_init();
uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
&sn_coherency_id, &sn_region_size);
uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
+ uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
OFFSET(BP_loadflags, boot_params, hdr.loadflags);
OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
OFFSET(BP_version, boot_params, hdr.version);
+ OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment);
}
OFFSET(BP_loadflags, boot_params, hdr.loadflags);
OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
OFFSET(BP_version, boot_params, hdr.version);
+ OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment);
BLANK();
DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
#
-# Makefile for x86-compatible CPU details and quirks
+# Makefile for x86-compatible CPU details, features and quirks
#
# Don't trace early stages of a secondary CPU boot
obj-$(CONFIG_CPU_SUP_TRANSMETA_32) += transmeta.o
obj-$(CONFIG_CPU_SUP_UMC_32) += umc.o
-obj-$(CONFIG_X86_MCE) += mcheck/
-obj-$(CONFIG_MTRR) += mtrr/
-obj-$(CONFIG_CPU_FREQ) += cpufreq/
+obj-$(CONFIG_PERF_COUNTERS) += perf_counter.o
-obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o
+obj-$(CONFIG_X86_MCE) += mcheck/
+obj-$(CONFIG_MTRR) += mtrr/
+obj-$(CONFIG_CPU_FREQ) += cpufreq/
+
+obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o
quiet_cmd_mkcapflags = MKCAP $@
cmd_mkcapflags = $(PERL) $(srctree)/$(src)/mkcapflags.pl $< $@
#include <asm/processor.h>
#include <asm/apic.h>
#include <asm/cpu.h>
+#include <asm/pci-direct.h>
#ifdef CONFIG_X86_64
# include <asm/numa_64.h>
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
int cpu = smp_processor_id();
int node;
- unsigned apicid = hard_smp_processor_id();
+ unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid;
node = c->phys_proc_id;
if (apicid_to_node[apicid] != NUMA_NO_NODE)
(c->x86_model == 8 && c->x86_mask >= 8))
set_cpu_cap(c, X86_FEATURE_K6_MTRR);
#endif
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_PCI)
+ /* check CPU config space for extended APIC ID */
+ if (c->x86 >= 0xf) {
+ unsigned int val;
+ val = read_pci_config(0, 24, 0, 0x68);
+ if ((val & ((1 << 17) | (1 << 18))) == ((1 << 17) | (1 << 18)))
+ set_cpu_cap(c, X86_FEATURE_EXTD_APICID);
+ }
+#endif
}
static void __cpuinit init_amd(struct cpuinfo_x86 *c)
#include <linux/io.h>
#include <asm/stackprotector.h>
+#include <asm/perf_counter.h>
#include <asm/mmu_context.h>
#include <asm/hypervisor.h>
#include <asm/processor.h>
return NULL; /* Not found */
}
-__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
+__u32 cpu_caps_cleared[NCAPINTS] __cpuinitdata;
+__u32 cpu_caps_set[NCAPINTS] __cpuinitdata;
void load_percpu_segment(int cpu)
{
if (this_cpu->c_identify)
this_cpu->c_identify(c);
+ /* Clear/Set all flags overriden by options, after probe */
+ for (i = 0; i < NCAPINTS; i++) {
+ c->x86_capability[i] &= ~cpu_caps_cleared[i];
+ c->x86_capability[i] |= cpu_caps_set[i];
+ }
+
#ifdef CONFIG_X86_64
c->apicid = apic->phys_pkg_id(c->initial_apicid, 0);
#endif
#endif
init_hypervisor(c);
+
+ /*
+ * Clear/Set all flags overriden by options, need do it
+ * before following smp all cpus cap AND.
+ */
+ for (i = 0; i < NCAPINTS; i++) {
+ c->x86_capability[i] &= ~cpu_caps_cleared[i];
+ c->x86_capability[i] |= cpu_caps_set[i];
+ }
+
/*
* On SMP, boot_cpu_data holds the common feature set between
* all CPUs; so make sure that we indicate which features are
boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
}
- /* Clear all flags overriden by options */
- for (i = 0; i < NCAPINTS; i++)
- c->x86_capability[i] &= ~cleared_cpu_caps[i];
-
#ifdef CONFIG_X86_MCE
/* Init Machine Check Exception if available. */
mcheck_init(c);
#else
vgetcpu_set_mode();
#endif
+ init_hw_perf_counters();
}
void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
static DEFINE_PER_CPU(struct cpu_cpuX_base, cpu_arr[CPU_REG_ALL_BIT]);
static DEFINE_PER_CPU(struct cpu_private *, priv_arr[MAX_CPU_FILES]);
-static DEFINE_PER_CPU(unsigned, cpu_modelflag);
static DEFINE_PER_CPU(int, cpu_priv_count);
-static DEFINE_PER_CPU(unsigned, cpu_model);
static DEFINE_MUTEX(cpu_debug_lock);
{ "value", CPU_REG_ALL, 1 },
};
-/* Intel Registers Range */
-static struct cpu_debug_range cpu_intel_range[] = {
- { 0x00000000, 0x00000001, CPU_MC, CPU_INTEL_ALL },
- { 0x00000006, 0x00000007, CPU_MONITOR, CPU_CX_AT_XE },
- { 0x00000010, 0x00000010, CPU_TIME, CPU_INTEL_ALL },
- { 0x00000011, 0x00000013, CPU_PMC, CPU_INTEL_PENTIUM },
- { 0x00000017, 0x00000017, CPU_PLATFORM, CPU_PX_CX_AT_XE },
- { 0x0000001B, 0x0000001B, CPU_APIC, CPU_P6_CX_AT_XE },
-
- { 0x0000002A, 0x0000002A, CPU_POWERON, CPU_PX_CX_AT_XE },
- { 0x0000002B, 0x0000002B, CPU_POWERON, CPU_INTEL_XEON },
- { 0x0000002C, 0x0000002C, CPU_FREQ, CPU_INTEL_XEON },
- { 0x0000003A, 0x0000003A, CPU_CONTROL, CPU_CX_AT_XE },
-
- { 0x00000040, 0x00000043, CPU_LBRANCH, CPU_PM_CX_AT_XE },
- { 0x00000044, 0x00000047, CPU_LBRANCH, CPU_PM_CO_AT },
- { 0x00000060, 0x00000063, CPU_LBRANCH, CPU_C2_AT },
- { 0x00000064, 0x00000067, CPU_LBRANCH, CPU_INTEL_ATOM },
-
- { 0x00000079, 0x00000079, CPU_BIOS, CPU_P6_CX_AT_XE },
- { 0x00000088, 0x0000008A, CPU_CACHE, CPU_INTEL_P6 },
- { 0x0000008B, 0x0000008B, CPU_BIOS, CPU_P6_CX_AT_XE },
- { 0x0000009B, 0x0000009B, CPU_MONITOR, CPU_INTEL_XEON },
-
- { 0x000000C1, 0x000000C2, CPU_PMC, CPU_P6_CX_AT },
- { 0x000000CD, 0x000000CD, CPU_FREQ, CPU_CX_AT },
- { 0x000000E7, 0x000000E8, CPU_PERF, CPU_CX_AT },
- { 0x000000FE, 0x000000FE, CPU_MTRR, CPU_P6_CX_XE },
-
- { 0x00000116, 0x00000116, CPU_CACHE, CPU_INTEL_P6 },
- { 0x00000118, 0x00000118, CPU_CACHE, CPU_INTEL_P6 },
- { 0x00000119, 0x00000119, CPU_CACHE, CPU_INTEL_PX },
- { 0x0000011A, 0x0000011B, CPU_CACHE, CPU_INTEL_P6 },
- { 0x0000011E, 0x0000011E, CPU_CACHE, CPU_PX_CX_AT },
-
- { 0x00000174, 0x00000176, CPU_SYSENTER, CPU_P6_CX_AT_XE },
- { 0x00000179, 0x0000017A, CPU_MC, CPU_PX_CX_AT_XE },
- { 0x0000017B, 0x0000017B, CPU_MC, CPU_P6_XE },
- { 0x00000186, 0x00000187, CPU_PMC, CPU_P6_CX_AT },
- { 0x00000198, 0x00000199, CPU_PERF, CPU_PM_CX_AT_XE },
- { 0x0000019A, 0x0000019A, CPU_TIME, CPU_PM_CX_AT_XE },
- { 0x0000019B, 0x0000019D, CPU_THERM, CPU_PM_CX_AT_XE },
- { 0x000001A0, 0x000001A0, CPU_MISC, CPU_PM_CX_AT_XE },
-
- { 0x000001C9, 0x000001C9, CPU_LBRANCH, CPU_PM_CX_AT },
- { 0x000001D7, 0x000001D8, CPU_LBRANCH, CPU_INTEL_XEON },
- { 0x000001D9, 0x000001D9, CPU_DEBUG, CPU_CX_AT_XE },
- { 0x000001DA, 0x000001DA, CPU_LBRANCH, CPU_INTEL_XEON },
- { 0x000001DB, 0x000001DB, CPU_LBRANCH, CPU_P6_XE },
- { 0x000001DC, 0x000001DC, CPU_LBRANCH, CPU_INTEL_P6 },
- { 0x000001DD, 0x000001DE, CPU_LBRANCH, CPU_PX_CX_AT_XE },
- { 0x000001E0, 0x000001E0, CPU_LBRANCH, CPU_INTEL_P6 },
-
- { 0x00000200, 0x0000020F, CPU_MTRR, CPU_P6_CX_XE },
- { 0x00000250, 0x00000250, CPU_MTRR, CPU_P6_CX_XE },
- { 0x00000258, 0x00000259, CPU_MTRR, CPU_P6_CX_XE },
- { 0x00000268, 0x0000026F, CPU_MTRR, CPU_P6_CX_XE },
- { 0x00000277, 0x00000277, CPU_PAT, CPU_C2_AT_XE },
- { 0x000002FF, 0x000002FF, CPU_MTRR, CPU_P6_CX_XE },
-
- { 0x00000300, 0x00000308, CPU_PMC, CPU_INTEL_XEON },
- { 0x00000309, 0x0000030B, CPU_PMC, CPU_C2_AT_XE },
- { 0x0000030C, 0x00000311, CPU_PMC, CPU_INTEL_XEON },
- { 0x00000345, 0x00000345, CPU_PMC, CPU_C2_AT },
- { 0x00000360, 0x00000371, CPU_PMC, CPU_INTEL_XEON },
- { 0x0000038D, 0x00000390, CPU_PMC, CPU_C2_AT },
- { 0x000003A0, 0x000003BE, CPU_PMC, CPU_INTEL_XEON },
- { 0x000003C0, 0x000003CD, CPU_PMC, CPU_INTEL_XEON },
- { 0x000003E0, 0x000003E1, CPU_PMC, CPU_INTEL_XEON },
- { 0x000003F0, 0x000003F0, CPU_PMC, CPU_INTEL_XEON },
- { 0x000003F1, 0x000003F1, CPU_PMC, CPU_C2_AT_XE },
- { 0x000003F2, 0x000003F2, CPU_PMC, CPU_INTEL_XEON },
-
- { 0x00000400, 0x00000402, CPU_MC, CPU_PM_CX_AT_XE },
- { 0x00000403, 0x00000403, CPU_MC, CPU_INTEL_XEON },
- { 0x00000404, 0x00000406, CPU_MC, CPU_PM_CX_AT_XE },
- { 0x00000407, 0x00000407, CPU_MC, CPU_INTEL_XEON },
- { 0x00000408, 0x0000040A, CPU_MC, CPU_PM_CX_AT_XE },
- { 0x0000040B, 0x0000040B, CPU_MC, CPU_INTEL_XEON },
- { 0x0000040C, 0x0000040E, CPU_MC, CPU_PM_CX_XE },
- { 0x0000040F, 0x0000040F, CPU_MC, CPU_INTEL_XEON },
- { 0x00000410, 0x00000412, CPU_MC, CPU_PM_CX_AT_XE },
- { 0x00000413, 0x00000417, CPU_MC, CPU_CX_AT_XE },
- { 0x00000480, 0x0000048B, CPU_VMX, CPU_CX_AT_XE },
-
- { 0x00000600, 0x00000600, CPU_DEBUG, CPU_PM_CX_AT_XE },
- { 0x00000680, 0x0000068F, CPU_LBRANCH, CPU_INTEL_XEON },
- { 0x000006C0, 0x000006CF, CPU_LBRANCH, CPU_INTEL_XEON },
-
- { 0x000107CC, 0x000107D3, CPU_PMC, CPU_INTEL_XEON_MP },
-
- { 0xC0000080, 0xC0000080, CPU_FEATURES, CPU_INTEL_XEON },
- { 0xC0000081, 0xC0000082, CPU_CALL, CPU_INTEL_XEON },
- { 0xC0000084, 0xC0000084, CPU_CALL, CPU_INTEL_XEON },
- { 0xC0000100, 0xC0000102, CPU_BASE, CPU_INTEL_XEON },
+/* CPU Registers Range */
+static struct cpu_debug_range cpu_reg_range[] = {
+ { 0x00000000, 0x00000001, CPU_MC, },
+ { 0x00000006, 0x00000007, CPU_MONITOR, },
+ { 0x00000010, 0x00000010, CPU_TIME, },
+ { 0x00000011, 0x00000013, CPU_PMC, },
+ { 0x00000017, 0x00000017, CPU_PLATFORM, },
+ { 0x0000001B, 0x0000001B, CPU_APIC, },
+ { 0x0000002A, 0x0000002B, CPU_POWERON, },
+ { 0x0000002C, 0x0000002C, CPU_FREQ, },
+ { 0x0000003A, 0x0000003A, CPU_CONTROL, },
+ { 0x00000040, 0x00000047, CPU_LBRANCH, },
+ { 0x00000060, 0x00000067, CPU_LBRANCH, },
+ { 0x00000079, 0x00000079, CPU_BIOS, },
+ { 0x00000088, 0x0000008A, CPU_CACHE, },
+ { 0x0000008B, 0x0000008B, CPU_BIOS, },
+ { 0x0000009B, 0x0000009B, CPU_MONITOR, },
+ { 0x000000C1, 0x000000C4, CPU_PMC, },
+ { 0x000000CD, 0x000000CD, CPU_FREQ, },
+ { 0x000000E7, 0x000000E8, CPU_PERF, },
+ { 0x000000FE, 0x000000FE, CPU_MTRR, },
+
+ { 0x00000116, 0x0000011E, CPU_CACHE, },
+ { 0x00000174, 0x00000176, CPU_SYSENTER, },
+ { 0x00000179, 0x0000017B, CPU_MC, },
+ { 0x00000186, 0x00000189, CPU_PMC, },
+ { 0x00000198, 0x00000199, CPU_PERF, },
+ { 0x0000019A, 0x0000019A, CPU_TIME, },
+ { 0x0000019B, 0x0000019D, CPU_THERM, },
+ { 0x000001A0, 0x000001A0, CPU_MISC, },
+ { 0x000001C9, 0x000001C9, CPU_LBRANCH, },
+ { 0x000001D7, 0x000001D8, CPU_LBRANCH, },
+ { 0x000001D9, 0x000001D9, CPU_DEBUG, },
+ { 0x000001DA, 0x000001E0, CPU_LBRANCH, },
+
+ { 0x00000200, 0x0000020F, CPU_MTRR, },
+ { 0x00000250, 0x00000250, CPU_MTRR, },
+ { 0x00000258, 0x00000259, CPU_MTRR, },
+ { 0x00000268, 0x0000026F, CPU_MTRR, },
+ { 0x00000277, 0x00000277, CPU_PAT, },
+ { 0x000002FF, 0x000002FF, CPU_MTRR, },
+
+ { 0x00000300, 0x00000311, CPU_PMC, },
+ { 0x00000345, 0x00000345, CPU_PMC, },
+ { 0x00000360, 0x00000371, CPU_PMC, },
+ { 0x0000038D, 0x00000390, CPU_PMC, },
+ { 0x000003A0, 0x000003BE, CPU_PMC, },
+ { 0x000003C0, 0x000003CD, CPU_PMC, },
+ { 0x000003E0, 0x000003E1, CPU_PMC, },
+ { 0x000003F0, 0x000003F2, CPU_PMC, },
+
+ { 0x00000400, 0x00000417, CPU_MC, },
+ { 0x00000480, 0x0000048B, CPU_VMX, },
+
+ { 0x00000600, 0x00000600, CPU_DEBUG, },
+ { 0x00000680, 0x0000068F, CPU_LBRANCH, },
+ { 0x000006C0, 0x000006CF, CPU_LBRANCH, },
+
+ { 0x000107CC, 0x000107D3, CPU_PMC, },
+
+ { 0xC0000080, 0xC0000080, CPU_FEATURES, },
+ { 0xC0000081, 0xC0000084, CPU_CALL, },
+ { 0xC0000100, 0xC0000102, CPU_BASE, },
+ { 0xC0000103, 0xC0000103, CPU_TIME, },
+
+ { 0xC0010000, 0xC0010007, CPU_PMC, },
+ { 0xC0010010, 0xC0010010, CPU_CONF, },
+ { 0xC0010015, 0xC0010015, CPU_CONF, },
+ { 0xC0010016, 0xC001001A, CPU_MTRR, },
+ { 0xC001001D, 0xC001001D, CPU_MTRR, },
+ { 0xC001001F, 0xC001001F, CPU_CONF, },
+ { 0xC0010030, 0xC0010035, CPU_BIOS, },
+ { 0xC0010044, 0xC0010048, CPU_MC, },
+ { 0xC0010050, 0xC0010056, CPU_SMM, },
+ { 0xC0010058, 0xC0010058, CPU_CONF, },
+ { 0xC0010060, 0xC0010060, CPU_CACHE, },
+ { 0xC0010061, 0xC0010068, CPU_SMM, },
+ { 0xC0010069, 0xC001006B, CPU_SMM, },
+ { 0xC0010070, 0xC0010071, CPU_SMM, },
+ { 0xC0010111, 0xC0010113, CPU_SMM, },
+ { 0xC0010114, 0xC0010118, CPU_SVM, },
+ { 0xC0010140, 0xC0010141, CPU_OSVM, },
+ { 0xC0011022, 0xC0011023, CPU_CONF, },
};
-/* AMD Registers Range */
-static struct cpu_debug_range cpu_amd_range[] = {
- { 0x00000000, 0x00000001, CPU_MC, CPU_K10_PLUS, },
- { 0x00000010, 0x00000010, CPU_TIME, CPU_K8_PLUS, },
- { 0x0000001B, 0x0000001B, CPU_APIC, CPU_K8_PLUS, },
- { 0x0000002A, 0x0000002A, CPU_POWERON, CPU_K7_PLUS },
- { 0x0000008B, 0x0000008B, CPU_VER, CPU_K8_PLUS },
- { 0x000000FE, 0x000000FE, CPU_MTRR, CPU_K8_PLUS, },
-
- { 0x00000174, 0x00000176, CPU_SYSENTER, CPU_K8_PLUS, },
- { 0x00000179, 0x0000017B, CPU_MC, CPU_K8_PLUS, },
- { 0x000001D9, 0x000001D9, CPU_DEBUG, CPU_K8_PLUS, },
- { 0x000001DB, 0x000001DE, CPU_LBRANCH, CPU_K8_PLUS, },
-
- { 0x00000200, 0x0000020F, CPU_MTRR, CPU_K8_PLUS, },
- { 0x00000250, 0x00000250, CPU_MTRR, CPU_K8_PLUS, },
- { 0x00000258, 0x00000259, CPU_MTRR, CPU_K8_PLUS, },
- { 0x00000268, 0x0000026F, CPU_MTRR, CPU_K8_PLUS, },
- { 0x00000277, 0x00000277, CPU_PAT, CPU_K8_PLUS, },
- { 0x000002FF, 0x000002FF, CPU_MTRR, CPU_K8_PLUS, },
-
- { 0x00000400, 0x00000413, CPU_MC, CPU_K8_PLUS, },
-
- { 0xC0000080, 0xC0000080, CPU_FEATURES, CPU_AMD_ALL, },
- { 0xC0000081, 0xC0000084, CPU_CALL, CPU_K8_PLUS, },
- { 0xC0000100, 0xC0000102, CPU_BASE, CPU_K8_PLUS, },
- { 0xC0000103, 0xC0000103, CPU_TIME, CPU_K10_PLUS, },
-
- { 0xC0010000, 0xC0010007, CPU_PMC, CPU_K8_PLUS, },
- { 0xC0010010, 0xC0010010, CPU_CONF, CPU_K7_PLUS, },
- { 0xC0010015, 0xC0010015, CPU_CONF, CPU_K7_PLUS, },
- { 0xC0010016, 0xC001001A, CPU_MTRR, CPU_K8_PLUS, },
- { 0xC001001D, 0xC001001D, CPU_MTRR, CPU_K8_PLUS, },
- { 0xC001001F, 0xC001001F, CPU_CONF, CPU_K8_PLUS, },
- { 0xC0010030, 0xC0010035, CPU_BIOS, CPU_K8_PLUS, },
- { 0xC0010044, 0xC0010048, CPU_MC, CPU_K8_PLUS, },
- { 0xC0010050, 0xC0010056, CPU_SMM, CPU_K0F_PLUS, },
- { 0xC0010058, 0xC0010058, CPU_CONF, CPU_K10_PLUS, },
- { 0xC0010060, 0xC0010060, CPU_CACHE, CPU_AMD_11, },
- { 0xC0010061, 0xC0010068, CPU_SMM, CPU_K10_PLUS, },
- { 0xC0010069, 0xC001006B, CPU_SMM, CPU_AMD_11, },
- { 0xC0010070, 0xC0010071, CPU_SMM, CPU_K10_PLUS, },
- { 0xC0010111, 0xC0010113, CPU_SMM, CPU_K8_PLUS, },
- { 0xC0010114, 0xC0010118, CPU_SVM, CPU_K10_PLUS, },
- { 0xC0010140, 0xC0010141, CPU_OSVM, CPU_K10_PLUS, },
- { 0xC0011022, 0xC0011023, CPU_CONF, CPU_K10_PLUS, },
-};
-
-
-/* Intel */
-static int get_intel_modelflag(unsigned model)
-{
- int flag;
-
- switch (model) {
- case 0x0501:
- case 0x0502:
- case 0x0504:
- flag = CPU_INTEL_PENTIUM;
- break;
- case 0x0601:
- case 0x0603:
- case 0x0605:
- case 0x0607:
- case 0x0608:
- case 0x060A:
- case 0x060B:
- flag = CPU_INTEL_P6;
- break;
- case 0x0609:
- case 0x060D:
- flag = CPU_INTEL_PENTIUM_M;
- break;
- case 0x060E:
- flag = CPU_INTEL_CORE;
- break;
- case 0x060F:
- case 0x0617:
- flag = CPU_INTEL_CORE2;
- break;
- case 0x061C:
- flag = CPU_INTEL_ATOM;
- break;
- case 0x0F00:
- case 0x0F01:
- case 0x0F02:
- case 0x0F03:
- case 0x0F04:
- flag = CPU_INTEL_XEON_P4;
- break;
- case 0x0F06:
- flag = CPU_INTEL_XEON_MP;
- break;
- default:
- flag = CPU_NONE;
- break;
- }
-
- return flag;
-}
-
-/* AMD */
-static int get_amd_modelflag(unsigned model)
-{
- int flag;
-
- switch (model >> 8) {
- case 0x6:
- flag = CPU_AMD_K6;
- break;
- case 0x7:
- flag = CPU_AMD_K7;
- break;
- case 0x8:
- flag = CPU_AMD_K8;
- break;
- case 0xf:
- flag = CPU_AMD_0F;
- break;
- case 0x10:
- flag = CPU_AMD_10;
- break;
- case 0x11:
- flag = CPU_AMD_11;
- break;
- default:
- flag = CPU_NONE;
- break;
- }
-
- return flag;
-}
-
-static int get_cpu_modelflag(unsigned cpu)
-{
- int flag;
-
- flag = per_cpu(cpu_model, cpu);
-
- switch (flag >> 16) {
- case X86_VENDOR_INTEL:
- flag = get_intel_modelflag(flag);
- break;
- case X86_VENDOR_AMD:
- flag = get_amd_modelflag(flag & 0xffff);
- break;
- default:
- flag = CPU_NONE;
- break;
- }
-
- return flag;
-}
-
-static int get_cpu_range_count(unsigned cpu)
-{
- int index;
-
- switch (per_cpu(cpu_model, cpu) >> 16) {
- case X86_VENDOR_INTEL:
- index = ARRAY_SIZE(cpu_intel_range);
- break;
- case X86_VENDOR_AMD:
- index = ARRAY_SIZE(cpu_amd_range);
- break;
- default:
- index = 0;
- break;
- }
-
- return index;
-}
-
static int is_typeflag_valid(unsigned cpu, unsigned flag)
{
- unsigned vendor, modelflag;
- int i, index;
+ int i;
/* Standard Registers should be always valid */
if (flag >= CPU_TSS)
return 1;
- modelflag = per_cpu(cpu_modelflag, cpu);
- vendor = per_cpu(cpu_model, cpu) >> 16;
- index = get_cpu_range_count(cpu);
-
- for (i = 0; i < index; i++) {
- switch (vendor) {
- case X86_VENDOR_INTEL:
- if ((cpu_intel_range[i].model & modelflag) &&
- (cpu_intel_range[i].flag & flag))
- return 1;
- break;
- case X86_VENDOR_AMD:
- if ((cpu_amd_range[i].model & modelflag) &&
- (cpu_amd_range[i].flag & flag))
- return 1;
- break;
- }
+ for (i = 0; i < ARRAY_SIZE(cpu_reg_range); i++) {
+ if (cpu_reg_range[i].flag == flag)
+ return 1;
}
/* Invalid */
static unsigned get_cpu_range(unsigned cpu, unsigned *min, unsigned *max,
int index, unsigned flag)
{
- unsigned modelflag;
-
- modelflag = per_cpu(cpu_modelflag, cpu);
- *max = 0;
- switch (per_cpu(cpu_model, cpu) >> 16) {
- case X86_VENDOR_INTEL:
- if ((cpu_intel_range[index].model & modelflag) &&
- (cpu_intel_range[index].flag & flag)) {
- *min = cpu_intel_range[index].min;
- *max = cpu_intel_range[index].max;
- }
- break;
- case X86_VENDOR_AMD:
- if ((cpu_amd_range[index].model & modelflag) &&
- (cpu_amd_range[index].flag & flag)) {
- *min = cpu_amd_range[index].min;
- *max = cpu_amd_range[index].max;
- }
- break;
- }
+ if (cpu_reg_range[index].flag == flag) {
+ *min = cpu_reg_range[index].min;
+ *max = cpu_reg_range[index].max;
+ } else
+ *max = 0;
return *max;
}
unsigned msr, msr_min, msr_max;
struct cpu_private *priv;
u32 low, high;
- int i, range;
+ int i;
if (seq) {
priv = seq->private;
}
}
- range = get_cpu_range_count(cpu);
-
- for (i = 0; i < range; i++) {
+ for (i = 0; i < ARRAY_SIZE(cpu_reg_range); i++) {
if (!get_cpu_range(cpu, &msr_min, &msr_max, i, flag))
continue;
seq_printf(seq, " TMICT\t\t: %08x\n", apic_read(APIC_TMICT));
seq_printf(seq, " TMCCT\t\t: %08x\n", apic_read(APIC_TMCCT));
seq_printf(seq, " TDCR\t\t: %08x\n", apic_read(APIC_TDCR));
-#endif /* CONFIG_X86_LOCAL_APIC */
+ if (boot_cpu_has(X86_FEATURE_EXTAPIC)) {
+ unsigned int i, v, maxeilvt;
+
+ v = apic_read(APIC_EFEAT);
+ maxeilvt = (v >> 16) & 0xff;
+ seq_printf(seq, " EFEAT\t\t: %08x\n", v);
+ seq_printf(seq, " ECTRL\t\t: %08x\n", apic_read(APIC_ECTRL));
+ for (i = 0; i < maxeilvt; i++) {
+ v = apic_read(APIC_EILVTn(i));
+ seq_printf(seq, " EILVT%d\t\t: %08x\n", i, v);
+ }
+ }
+#endif /* CONFIG_X86_LOCAL_APIC */
seq_printf(seq, "\n MSR\t:\n");
}
{
struct dentry *cpu_dentry = NULL;
unsigned reg, reg_min, reg_max;
- int i, range, err = 0;
+ int i, err = 0;
char reg_dir[12];
u32 low, high;
- range = get_cpu_range_count(cpu);
-
- for (i = 0; i < range; i++) {
+ for (i = 0; i < ARRAY_SIZE(cpu_reg_range); i++) {
if (!get_cpu_range(cpu, ®_min, ®_max, i,
cpu_base[type].flag))
continue;
cpui = &cpu_data(cpu);
if (!cpu_has(cpui, X86_FEATURE_MSR))
continue;
- per_cpu(cpu_model, cpu) = ((cpui->x86_vendor << 16) |
- (cpui->x86 << 8) |
- (cpui->x86_model));
- per_cpu(cpu_modelflag, cpu) = get_cpu_modelflag(cpu);
sprintf(cpu_dir, "cpu%d", cpu);
cpu_dentry = debugfs_create_dir(cpu_dir, cpu_debugfs_dir);
If in doubt, say N.
config X86_E_POWERSAVER
- tristate "VIA C7 Enhanced PowerSaver"
+ tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
select CPU_FREQ_TABLE
- depends on X86_32
+ depends on X86_32 && EXPERIMENTAL
help
- This adds the CPUFreq driver for VIA C7 processors.
+ This adds the CPUFreq driver for VIA C7 processors. However, this driver
+ does not have any safeguards to prevent operating the CPU out of spec
+ and is thus considered dangerous. Please use the regular ACPI cpufreq
+ driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
If in doubt, say N.
{
struct cpuinfo_x86 *cpu = &cpu_data(cpuid);
- if (cpu->x86_vendor != X86_VENDOR_INTEL ||
- !cpu_has(cpu, X86_FEATURE_EST))
- return 0;
-
- return 1;
+ return cpu_has(cpu, X86_FEATURE_EST);
}
static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
}
#endif
-static void __cpuinit srat_detect_node(void)
+static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
{
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
unsigned node;
int cpu = smp_processor_id();
- int apicid = hard_smp_processor_id();
+ int apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid;
/* Don't do the funky fallback heuristics the AMD version employs
for now. */
}
/* Work around errata */
- srat_detect_node();
+ srat_detect_node(c);
if (cpu_has(c, X86_FEATURE_VMX))
detect_vmx_virtcap(c);
#include <asm/processor.h>
#include <asm/smp.h>
+#include <asm/k8.h>
#define LVL_1_INST 1
#define LVL_1_DATA 2
unsigned long can_disable;
};
-#if defined(CONFIG_PCI) && defined(CONFIG_SYSFS)
-static struct pci_device_id k8_nb_id[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1103) },
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1203) },
- {}
-};
-#endif
-
unsigned short num_cache_leaves;
/* AMD doesn't have CPUID4. Emulate it here to report the same
};
static const unsigned short __cpuinitconst assocs[] = {
- [1] = 1, [2] = 2, [4] = 4, [6] = 8,
- [8] = 16, [0xa] = 32, [0xb] = 48,
+ [1] = 1,
+ [2] = 2,
+ [4] = 4,
+ [6] = 8,
+ [8] = 16,
+ [0xa] = 32,
+ [0xb] = 48,
[0xc] = 64,
- [0xf] = 0xffff // ??
+ [0xd] = 96,
+ [0xe] = 128,
+ [0xf] = 0xffff /* fully associative - no way to show this currently */
};
static const unsigned char __cpuinitconst levels[] = { 1, 1, 2, 3 };
eax->split.type = types[leaf];
eax->split.level = levels[leaf];
if (leaf == 3)
- eax->split.num_threads_sharing = current_cpu_data.x86_max_cores - 1;
+ eax->split.num_threads_sharing =
+ current_cpu_data.x86_max_cores - 1;
else
eax->split.num_threads_sharing = 0;
eax->split.num_cores_on_die = current_cpu_data.x86_max_cores - 1;
{
if (index < 3)
return;
+
+ if (boot_cpu_data.x86 == 0x11)
+ return;
+
+ /* see erratum #382 */
+ if ((boot_cpu_data.x86 == 0x10) && (boot_cpu_data.x86_model < 0x8))
+ return;
+
this_leaf->can_disable = 1;
}
#define to_object(k) container_of(k, struct _index_kobject, kobj)
#define to_attr(a) container_of(a, struct _cache_attr, attr)
-#ifdef CONFIG_PCI
-static struct pci_dev *get_k8_northbridge(int node)
-{
- struct pci_dev *dev = NULL;
- int i;
-
- for (i = 0; i <= node; i++) {
- do {
- dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
- if (!dev)
- break;
- } while (!pci_match_id(&k8_nb_id[0], dev));
- if (!dev)
- break;
- }
- return dev;
-}
-#else
-static struct pci_dev *get_k8_northbridge(int node)
-{
- return NULL;
-}
-#endif
-
-static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf)
+static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
+ unsigned int index)
{
- const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
- int node = cpu_to_node(cpumask_first(mask));
- struct pci_dev *dev = NULL;
- ssize_t ret = 0;
- int i;
+ int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
+ int node = cpu_to_node(cpu);
+ struct pci_dev *dev = node_to_k8_nb_misc(node);
+ unsigned int reg = 0;
if (!this_leaf->can_disable)
- return sprintf(buf, "Feature not enabled\n");
-
- dev = get_k8_northbridge(node);
- if (!dev) {
- printk(KERN_ERR "Attempting AMD northbridge operation on a system with no northbridge\n");
return -EINVAL;
- }
- for (i = 0; i < 2; i++) {
- unsigned int reg;
+ if (!dev)
+ return -EINVAL;
- pci_read_config_dword(dev, 0x1BC + i * 4, ®);
+ pci_read_config_dword(dev, 0x1BC + index * 4, ®);
+ return sprintf(buf, "%x\n", reg);
+}
- ret += sprintf(buf, "%sEntry: %d\n", buf, i);
- ret += sprintf(buf, "%sReads: %s\tNew Entries: %s\n",
- buf,
- reg & 0x80000000 ? "Disabled" : "Allowed",
- reg & 0x40000000 ? "Disabled" : "Allowed");
- ret += sprintf(buf, "%sSubCache: %x\tIndex: %x\n",
- buf, (reg & 0x30000) >> 16, reg & 0xfff);
- }
- return ret;
+#define SHOW_CACHE_DISABLE(index) \
+static ssize_t \
+show_cache_disable_##index(struct _cpuid4_info *this_leaf, char *buf) \
+{ \
+ return show_cache_disable(this_leaf, buf, index); \
}
+SHOW_CACHE_DISABLE(0)
+SHOW_CACHE_DISABLE(1)
-static ssize_t
-store_cache_disable(struct _cpuid4_info *this_leaf, const char *buf,
- size_t count)
+static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
+ const char *buf, size_t count, unsigned int index)
{
- const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
- int node = cpu_to_node(cpumask_first(mask));
- struct pci_dev *dev = NULL;
- unsigned int ret, index, val;
+ int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
+ int node = cpu_to_node(cpu);
+ struct pci_dev *dev = node_to_k8_nb_misc(node);
+ unsigned long val = 0;
+ unsigned int scrubber = 0;
if (!this_leaf->can_disable)
- return 0;
-
- if (strlen(buf) > 15)
return -EINVAL;
- ret = sscanf(buf, "%x %x", &index, &val);
- if (ret != 2)
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!dev)
return -EINVAL;
- if (index > 1)
+
+ if (strict_strtoul(buf, 10, &val) < 0)
return -EINVAL;
val |= 0xc0000000;
- dev = get_k8_northbridge(node);
- if (!dev) {
- printk(KERN_ERR "Attempting AMD northbridge operation on a system with no northbridge\n");
- return -EINVAL;
- }
+
+ pci_read_config_dword(dev, 0x58, &scrubber);
+ scrubber &= ~0x1f000000;
+ pci_write_config_dword(dev, 0x58, scrubber);
pci_write_config_dword(dev, 0x1BC + index * 4, val & ~0x40000000);
wbinvd();
pci_write_config_dword(dev, 0x1BC + index * 4, val);
+ return count;
+}
- return 1;
+#define STORE_CACHE_DISABLE(index) \
+static ssize_t \
+store_cache_disable_##index(struct _cpuid4_info *this_leaf, \
+ const char *buf, size_t count) \
+{ \
+ return store_cache_disable(this_leaf, buf, count, index); \
}
+STORE_CACHE_DISABLE(0)
+STORE_CACHE_DISABLE(1)
struct _cache_attr {
struct attribute attr;
define_one_ro(shared_cpu_map);
define_one_ro(shared_cpu_list);
-static struct _cache_attr cache_disable = __ATTR(cache_disable, 0644, show_cache_disable, store_cache_disable);
+static struct _cache_attr cache_disable_0 = __ATTR(cache_disable_0, 0644,
+ show_cache_disable_0, store_cache_disable_0);
+static struct _cache_attr cache_disable_1 = __ATTR(cache_disable_1, 0644,
+ show_cache_disable_1, store_cache_disable_1);
static struct attribute * default_attrs[] = {
&type.attr,
&size.attr,
&shared_cpu_map.attr,
&shared_cpu_list.attr,
- &cache_disable.attr,
+ &cache_disable_0.attr,
+ &cache_disable_1.attr,
NULL
};
#include <asm/hw_irq.h>
#include <asm/idle.h>
#include <asm/therm_throt.h>
-#include <asm/apic.h>
asmlinkage void smp_thermal_interrupt(void)
{
if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
return 0;
- rdmsr(MTRRdefType_MSR, def, dummy);
+ rdmsr(MSR_MTRRdefType, def, dummy);
def &= 0xff;
if (def != MTRR_TYPE_UNCACHABLE)
return 0;
*/
if (!is_cpu(INTEL) || disable_mtrr_trim)
return 0;
- rdmsr(MTRRdefType_MSR, def, dummy);
+ rdmsr(MSR_MTRRdefType, def, dummy);
def &= 0xff;
if (def != MTRR_TYPE_UNCACHABLE)
return 0;
};
static struct fixed_range_block fixed_range_blocks[] = {
- { MTRRfix64K_00000_MSR, 1 }, /* one 64k MTRR */
- { MTRRfix16K_80000_MSR, 2 }, /* two 16k MTRRs */
- { MTRRfix4K_C0000_MSR, 8 }, /* eight 4k MTRRs */
+ { MSR_MTRRfix64K_00000, 1 }, /* one 64k MTRR */
+ { MSR_MTRRfix16K_80000, 2 }, /* two 16k MTRRs */
+ { MSR_MTRRfix4K_C0000, 8 }, /* eight 4k MTRRs */
{}
};
k8_check_syscfg_dram_mod_en();
- rdmsr(MTRRfix64K_00000_MSR, p[0], p[1]);
+ rdmsr(MSR_MTRRfix64K_00000, p[0], p[1]);
for (i = 0; i < 2; i++)
- rdmsr(MTRRfix16K_80000_MSR + i, p[2 + i * 2], p[3 + i * 2]);
+ rdmsr(MSR_MTRRfix16K_80000 + i, p[2 + i * 2], p[3 + i * 2]);
for (i = 0; i < 8; i++)
- rdmsr(MTRRfix4K_C0000_MSR + i, p[6 + i * 2], p[7 + i * 2]);
+ rdmsr(MSR_MTRRfix4K_C0000 + i, p[6 + i * 2], p[7 + i * 2]);
}
void mtrr_save_fixed_ranges(void *info)
vrs = mtrr_state.var_ranges;
- rdmsr(MTRRcap_MSR, lo, dummy);
+ rdmsr(MSR_MTRRcap, lo, dummy);
mtrr_state.have_fixed = (lo >> 8) & 1;
for (i = 0; i < num_var_ranges; i++)
if (mtrr_state.have_fixed)
get_fixed_ranges(mtrr_state.fixed_ranges);
- rdmsr(MTRRdefType_MSR, lo, dummy);
+ rdmsr(MSR_MTRRdefType, lo, dummy);
mtrr_state.def_type = (lo & 0xff);
mtrr_state.enabled = (lo & 0xc00) >> 10;
__flush_tlb();
/* Save MTRR state */
- rdmsr(MTRRdefType_MSR, deftype_lo, deftype_hi);
+ rdmsr(MSR_MTRRdefType, deftype_lo, deftype_hi);
/* Disable MTRRs, and set the default type to uncached */
- mtrr_wrmsr(MTRRdefType_MSR, deftype_lo & ~0xcff, deftype_hi);
+ mtrr_wrmsr(MSR_MTRRdefType, deftype_lo & ~0xcff, deftype_hi);
}
static void post_set(void) __releases(set_atomicity_lock)
__flush_tlb();
/* Intel (P6) standard MTRRs */
- mtrr_wrmsr(MTRRdefType_MSR, deftype_lo, deftype_hi);
+ mtrr_wrmsr(MSR_MTRRdefType, deftype_lo, deftype_hi);
/* Enable caches */
write_cr0(read_cr0() & 0xbfffffff);
static int generic_have_wrcomb(void)
{
unsigned long config, dummy;
- rdmsr(MTRRcap_MSR, config, dummy);
+ rdmsr(MSR_MTRRcap, config, dummy);
return (config & (1 << 10));
}
unsigned long config = 0, dummy;
if (use_intel()) {
- rdmsr(MTRRcap_MSR, config, dummy);
+ rdmsr(MSR_MTRRcap, config, dummy);
} else if (is_cpu(AMD))
config = 2;
else if (is_cpu(CYRIX) || is_cpu(CENTAUR))
#include <linux/types.h>
#include <linux/stddef.h>
-#define MTRRcap_MSR 0x0fe
-#define MTRRdefType_MSR 0x2ff
-
-#define MTRRfix64K_00000_MSR 0x250
-#define MTRRfix16K_80000_MSR 0x258
-#define MTRRfix16K_A0000_MSR 0x259
-#define MTRRfix4K_C0000_MSR 0x268
-#define MTRRfix4K_C8000_MSR 0x269
-#define MTRRfix4K_D0000_MSR 0x26a
-#define MTRRfix4K_D8000_MSR 0x26b
-#define MTRRfix4K_E0000_MSR 0x26c
-#define MTRRfix4K_E8000_MSR 0x26d
-#define MTRRfix4K_F0000_MSR 0x26e
-#define MTRRfix4K_F8000_MSR 0x26f
-
#define MTRR_CHANGE_MASK_FIXED 0x01
#define MTRR_CHANGE_MASK_VARIABLE 0x02
#define MTRR_CHANGE_MASK_DEFTYPE 0x04
if (use_intel())
/* Save MTRR state */
- rdmsr(MTRRdefType_MSR, ctxt->deftype_lo, ctxt->deftype_hi);
+ rdmsr(MSR_MTRRdefType, ctxt->deftype_lo, ctxt->deftype_hi);
else
/* Cyrix ARRs - everything else were excluded at the top */
ctxt->ccr3 = getCx86(CX86_CCR3);
{
if (use_intel())
/* Disable MTRRs, and set the default type to uncached */
- mtrr_wrmsr(MTRRdefType_MSR, ctxt->deftype_lo & 0xf300UL,
+ mtrr_wrmsr(MSR_MTRRdefType, ctxt->deftype_lo & 0xf300UL,
ctxt->deftype_hi);
else if (is_cpu(CYRIX))
/* Cyrix ARRs - everything else were excluded at the top */
/* Restore MTRRdefType */
if (use_intel())
/* Intel (P6) standard MTRRs */
- mtrr_wrmsr(MTRRdefType_MSR, ctxt->deftype_lo, ctxt->deftype_hi);
+ mtrr_wrmsr(MSR_MTRRdefType, ctxt->deftype_lo, ctxt->deftype_hi);
else
/* Cyrix ARRs - everything else was excluded at the top */
setCx86(CX86_CCR3, ctxt->ccr3);
--- /dev/null
+/*
+ * Performance counter x86 architecture code
+ *
+ * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de>
+ * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar
+ * Copyright (C) 2009 Jaswinder Singh Rajput
+ * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter
+ * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+
+#include <linux/perf_counter.h>
+#include <linux/capability.h>
+#include <linux/notifier.h>
+#include <linux/hardirq.h>
+#include <linux/kprobes.h>
+#include <linux/module.h>
+#include <linux/kdebug.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+
+#include <asm/apic.h>
+#include <asm/stacktrace.h>
+#include <asm/nmi.h>
+
+static u64 perf_counter_mask __read_mostly;
+
+struct cpu_hw_counters {
+ struct perf_counter *counters[X86_PMC_IDX_MAX];
+ unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
+ unsigned long active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
+ unsigned long interrupts;
+ int enabled;
+};
+
+/*
+ * struct x86_pmu - generic x86 pmu
+ */
+struct x86_pmu {
+ const char *name;
+ int version;
+ int (*handle_irq)(struct pt_regs *);
+ void (*disable_all)(void);
+ void (*enable_all)(void);
+ void (*enable)(struct hw_perf_counter *, int);
+ void (*disable)(struct hw_perf_counter *, int);
+ unsigned eventsel;
+ unsigned perfctr;
+ u64 (*event_map)(int);
+ u64 (*raw_event)(u64);
+ int max_events;
+ int num_counters;
+ int num_counters_fixed;
+ int counter_bits;
+ u64 counter_mask;
+ u64 max_period;
+ u64 intel_ctrl;
+};
+
+static struct x86_pmu x86_pmu __read_mostly;
+
+static DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters) = {
+ .enabled = 1,
+};
+
+/*
+ * Intel PerfMon v3. Used on Core2 and later.
+ */
+static const u64 intel_perfmon_event_map[] =
+{
+ [PERF_COUNT_HW_CPU_CYCLES] = 0x003c,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x4f2e,
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x412e,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4,
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5,
+ [PERF_COUNT_HW_BUS_CYCLES] = 0x013c,
+};
+
+static u64 intel_pmu_event_map(int event)
+{
+ return intel_perfmon_event_map[event];
+}
+
+/*
+ * Generalized hw caching related event table, filled
+ * in on a per model basis. A value of 0 means
+ * 'not supported', -1 means 'event makes no sense on
+ * this CPU', any other value means the raw event
+ * ID.
+ */
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+static u64 __read_mostly hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX];
+
+static const u64 nehalem_hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI */
+ [ C(RESULT_MISS) ] = 0x0140, /* L1D_CACHE_LD.I_STATE */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI */
+ [ C(RESULT_MISS) ] = 0x0141, /* L1D_CACHE_ST.I_STATE */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0x014e, /* L1D_PREFETCH.REQUESTS */
+ [ C(RESULT_MISS) ] = 0x024e, /* L1D_PREFETCH.MISS */
+ },
+ },
+ [ C(L1I ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS */
+ [ C(RESULT_MISS) ] = 0x0280, /* L1I.MISSES */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0,
+ [ C(RESULT_MISS) ] = 0x0,
+ },
+ },
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0324, /* L2_RQSTS.LOADS */
+ [ C(RESULT_MISS) ] = 0x0224, /* L2_RQSTS.LD_MISS */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0c24, /* L2_RQSTS.RFOS */
+ [ C(RESULT_MISS) ] = 0x0824, /* L2_RQSTS.RFO_MISS */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4f2e, /* LLC Reference */
+ [ C(RESULT_MISS) ] = 0x412e, /* LLC Misses */
+ },
+ },
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI (alias) */
+ [ C(RESULT_MISS) ] = 0x0108, /* DTLB_LOAD_MISSES.ANY */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI (alias) */
+ [ C(RESULT_MISS) ] = 0x010c, /* MEM_STORE_RETIRED.DTLB_MISS */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0,
+ [ C(RESULT_MISS) ] = 0x0,
+ },
+ },
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x01c0, /* INST_RETIRED.ANY_P */
+ [ C(RESULT_MISS) ] = 0x20c8, /* ITLB_MISS_RETIRED */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(BPU ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
+ [ C(RESULT_MISS) ] = 0x03e8, /* BPU_CLEARS.ANY */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+static const u64 core2_hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI */
+ [ C(RESULT_MISS) ] = 0x0140, /* L1D_CACHE_LD.I_STATE */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI */
+ [ C(RESULT_MISS) ] = 0x0141, /* L1D_CACHE_ST.I_STATE */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0x104e, /* L1D_PREFETCH.REQUESTS */
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(L1I ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0080, /* L1I.READS */
+ [ C(RESULT_MISS) ] = 0x0081, /* L1I.MISSES */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI */
+ [ C(RESULT_MISS) ] = 0x4129, /* L2_LD.ISTATE */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI */
+ [ C(RESULT_MISS) ] = 0x412A, /* L2_ST.ISTATE */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI (alias) */
+ [ C(RESULT_MISS) ] = 0x0208, /* DTLB_MISSES.MISS_LD */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI (alias) */
+ [ C(RESULT_MISS) ] = 0x0808, /* DTLB_MISSES.MISS_ST */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P */
+ [ C(RESULT_MISS) ] = 0x1282, /* ITLBMISSES */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(BPU ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY */
+ [ C(RESULT_MISS) ] = 0x00c5, /* BP_INST_RETIRED.MISPRED */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+static const u64 atom_hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE.LD */
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE.ST */
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(L1I ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS */
+ [ C(RESULT_MISS) ] = 0x0280, /* L1I.MISSES */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI */
+ [ C(RESULT_MISS) ] = 0x4129, /* L2_LD.ISTATE */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI */
+ [ C(RESULT_MISS) ] = 0x412A, /* L2_ST.ISTATE */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE_LD.MESI (alias) */
+ [ C(RESULT_MISS) ] = 0x0508, /* DTLB_MISSES.MISS_LD */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE_ST.MESI (alias) */
+ [ C(RESULT_MISS) ] = 0x0608, /* DTLB_MISSES.MISS_ST */
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P */
+ [ C(RESULT_MISS) ] = 0x0282, /* ITLB.MISSES */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(BPU ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY */
+ [ C(RESULT_MISS) ] = 0x00c5, /* BP_INST_RETIRED.MISPRED */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+static u64 intel_pmu_raw_event(u64 event)
+{
+#define CORE_EVNTSEL_EVENT_MASK 0x000000FFULL
+#define CORE_EVNTSEL_UNIT_MASK 0x0000FF00ULL
+#define CORE_EVNTSEL_EDGE_MASK 0x00040000ULL
+#define CORE_EVNTSEL_INV_MASK 0x00800000ULL
+#define CORE_EVNTSEL_COUNTER_MASK 0xFF000000ULL
+
+#define CORE_EVNTSEL_MASK \
+ (CORE_EVNTSEL_EVENT_MASK | \
+ CORE_EVNTSEL_UNIT_MASK | \
+ CORE_EVNTSEL_EDGE_MASK | \
+ CORE_EVNTSEL_INV_MASK | \
+ CORE_EVNTSEL_COUNTER_MASK)
+
+ return event & CORE_EVNTSEL_MASK;
+}
+
+static const u64 amd_0f_hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(L1I ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0080, /* Instruction cache fetches */
+ [ C(RESULT_MISS) ] = 0x0081, /* Instruction cache misses */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0080, /* Instruction fecthes */
+ [ C(RESULT_MISS) ] = 0x0085, /* Instr. fetch ITLB misses */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(BPU ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x00c2, /* Retired Branch Instr. */
+ [ C(RESULT_MISS) ] = 0x00c3, /* Retired Mispredicted BI */
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+/*
+ * AMD Performance Monitor K7 and later.
+ */
+static const u64 amd_perfmon_event_map[] =
+{
+ [PERF_COUNT_HW_CPU_CYCLES] = 0x0076,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0080,
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x0081,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4,
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5,
+};
+
+static u64 amd_pmu_event_map(int event)
+{
+ return amd_perfmon_event_map[event];
+}
+
+static u64 amd_pmu_raw_event(u64 event)
+{
+#define K7_EVNTSEL_EVENT_MASK 0x7000000FFULL
+#define K7_EVNTSEL_UNIT_MASK 0x00000FF00ULL
+#define K7_EVNTSEL_EDGE_MASK 0x000040000ULL
+#define K7_EVNTSEL_INV_MASK 0x000800000ULL
+#define K7_EVNTSEL_COUNTER_MASK 0x0FF000000ULL
+
+#define K7_EVNTSEL_MASK \
+ (K7_EVNTSEL_EVENT_MASK | \
+ K7_EVNTSEL_UNIT_MASK | \
+ K7_EVNTSEL_EDGE_MASK | \
+ K7_EVNTSEL_INV_MASK | \
+ K7_EVNTSEL_COUNTER_MASK)
+
+ return event & K7_EVNTSEL_MASK;
+}
+
+/*
+ * Propagate counter elapsed time into the generic counter.
+ * Can only be executed on the CPU where the counter is active.
+ * Returns the delta events processed.
+ */
+static u64
+x86_perf_counter_update(struct perf_counter *counter,
+ struct hw_perf_counter *hwc, int idx)
+{
+ int shift = 64 - x86_pmu.counter_bits;
+ u64 prev_raw_count, new_raw_count;
+ s64 delta;
+
+ /*
+ * Careful: an NMI might modify the previous counter value.
+ *
+ * Our tactic to handle this is to first atomically read and
+ * exchange a new raw count - then add that new-prev delta
+ * count to the generic counter atomically:
+ */
+again:
+ prev_raw_count = atomic64_read(&hwc->prev_count);
+ rdmsrl(hwc->counter_base + idx, new_raw_count);
+
+ if (atomic64_cmpxchg(&hwc->prev_count, prev_raw_count,
+ new_raw_count) != prev_raw_count)
+ goto again;
+
+ /*
+ * Now we have the new raw value and have updated the prev
+ * timestamp already. We can now calculate the elapsed delta
+ * (counter-)time and add that to the generic counter.
+ *
+ * Careful, not all hw sign-extends above the physical width
+ * of the count.
+ */
+ delta = (new_raw_count << shift) - (prev_raw_count << shift);
+ delta >>= shift;
+
+ atomic64_add(delta, &counter->count);
+ atomic64_sub(delta, &hwc->period_left);
+
+ return new_raw_count;
+}
+
+static atomic_t active_counters;
+static DEFINE_MUTEX(pmc_reserve_mutex);
+
+static bool reserve_pmc_hardware(void)
+{
+ int i;
+
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ disable_lapic_nmi_watchdog();
+
+ for (i = 0; i < x86_pmu.num_counters; i++) {
+ if (!reserve_perfctr_nmi(x86_pmu.perfctr + i))
+ goto perfctr_fail;
+ }
+
+ for (i = 0; i < x86_pmu.num_counters; i++) {
+ if (!reserve_evntsel_nmi(x86_pmu.eventsel + i))
+ goto eventsel_fail;
+ }
+
+ return true;
+
+eventsel_fail:
+ for (i--; i >= 0; i--)
+ release_evntsel_nmi(x86_pmu.eventsel + i);
+
+ i = x86_pmu.num_counters;
+
+perfctr_fail:
+ for (i--; i >= 0; i--)
+ release_perfctr_nmi(x86_pmu.perfctr + i);
+
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ enable_lapic_nmi_watchdog();
+
+ return false;
+}
+
+static void release_pmc_hardware(void)
+{
+ int i;
+
+ for (i = 0; i < x86_pmu.num_counters; i++) {
+ release_perfctr_nmi(x86_pmu.perfctr + i);
+ release_evntsel_nmi(x86_pmu.eventsel + i);
+ }
+
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ enable_lapic_nmi_watchdog();
+}
+
+static void hw_perf_counter_destroy(struct perf_counter *counter)
+{
+ if (atomic_dec_and_mutex_lock(&active_counters, &pmc_reserve_mutex)) {
+ release_pmc_hardware();
+ mutex_unlock(&pmc_reserve_mutex);
+ }
+}
+
+static inline int x86_pmu_initialized(void)
+{
+ return x86_pmu.handle_irq != NULL;
+}
+
+static inline int
+set_ext_hw_attr(struct hw_perf_counter *hwc, struct perf_counter_attr *attr)
+{
+ unsigned int cache_type, cache_op, cache_result;
+ u64 config, val;
+
+ config = attr->config;
+
+ cache_type = (config >> 0) & 0xff;
+ if (cache_type >= PERF_COUNT_HW_CACHE_MAX)
+ return -EINVAL;
+
+ cache_op = (config >> 8) & 0xff;
+ if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX)
+ return -EINVAL;
+
+ cache_result = (config >> 16) & 0xff;
+ if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
+ return -EINVAL;
+
+ val = hw_cache_event_ids[cache_type][cache_op][cache_result];
+
+ if (val == 0)
+ return -ENOENT;
+
+ if (val == -1)
+ return -EINVAL;
+
+ hwc->config |= val;
+
+ return 0;
+}
+
+/*
+ * Setup the hardware configuration for a given attr_type
+ */
+static int __hw_perf_counter_init(struct perf_counter *counter)
+{
+ struct perf_counter_attr *attr = &counter->attr;
+ struct hw_perf_counter *hwc = &counter->hw;
+ int err;
+
+ if (!x86_pmu_initialized())
+ return -ENODEV;
+
+ err = 0;
+ if (!atomic_inc_not_zero(&active_counters)) {
+ mutex_lock(&pmc_reserve_mutex);
+ if (atomic_read(&active_counters) == 0 && !reserve_pmc_hardware())
+ err = -EBUSY;
+ else
+ atomic_inc(&active_counters);
+ mutex_unlock(&pmc_reserve_mutex);
+ }
+ if (err)
+ return err;
+
+ /*
+ * Generate PMC IRQs:
+ * (keep 'enabled' bit clear for now)
+ */
+ hwc->config = ARCH_PERFMON_EVENTSEL_INT;
+
+ /*
+ * Count user and OS events unless requested not to.
+ */
+ if (!attr->exclude_user)
+ hwc->config |= ARCH_PERFMON_EVENTSEL_USR;
+ if (!attr->exclude_kernel)
+ hwc->config |= ARCH_PERFMON_EVENTSEL_OS;
+
+ if (!hwc->sample_period) {
+ hwc->sample_period = x86_pmu.max_period;
+ hwc->last_period = hwc->sample_period;
+ atomic64_set(&hwc->period_left, hwc->sample_period);
+ }
+
+ counter->destroy = hw_perf_counter_destroy;
+
+ /*
+ * Raw event type provide the config in the event structure
+ */
+ if (attr->type == PERF_TYPE_RAW) {
+ hwc->config |= x86_pmu.raw_event(attr->config);
+ return 0;
+ }
+
+ if (attr->type == PERF_TYPE_HW_CACHE)
+ return set_ext_hw_attr(hwc, attr);
+
+ if (attr->config >= x86_pmu.max_events)
+ return -EINVAL;
+ /*
+ * The generic map:
+ */
+ hwc->config |= x86_pmu.event_map(attr->config);
+
+ return 0;
+}
+
+static void intel_pmu_disable_all(void)
+{
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
+}
+
+static void amd_pmu_disable_all(void)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ int idx;
+
+ if (!cpuc->enabled)
+ return;
+
+ cpuc->enabled = 0;
+ /*
+ * ensure we write the disable before we start disabling the
+ * counters proper, so that amd_pmu_enable_counter() does the
+ * right thing.
+ */
+ barrier();
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ u64 val;
+
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+ rdmsrl(MSR_K7_EVNTSEL0 + idx, val);
+ if (!(val & ARCH_PERFMON_EVENTSEL0_ENABLE))
+ continue;
+ val &= ~ARCH_PERFMON_EVENTSEL0_ENABLE;
+ wrmsrl(MSR_K7_EVNTSEL0 + idx, val);
+ }
+}
+
+void hw_perf_disable(void)
+{
+ if (!x86_pmu_initialized())
+ return;
+ return x86_pmu.disable_all();
+}
+
+static void intel_pmu_enable_all(void)
+{
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl);
+}
+
+static void amd_pmu_enable_all(void)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ int idx;
+
+ if (cpuc->enabled)
+ return;
+
+ cpuc->enabled = 1;
+ barrier();
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ u64 val;
+
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+ rdmsrl(MSR_K7_EVNTSEL0 + idx, val);
+ if (val & ARCH_PERFMON_EVENTSEL0_ENABLE)
+ continue;
+ val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
+ wrmsrl(MSR_K7_EVNTSEL0 + idx, val);
+ }
+}
+
+void hw_perf_enable(void)
+{
+ if (!x86_pmu_initialized())
+ return;
+ x86_pmu.enable_all();
+}
+
+static inline u64 intel_pmu_get_status(void)
+{
+ u64 status;
+
+ rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);
+
+ return status;
+}
+
+static inline void intel_pmu_ack_status(u64 ack)
+{
+ wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, ack);
+}
+
+static inline void x86_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ int err;
+ err = checking_wrmsrl(hwc->config_base + idx,
+ hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE);
+}
+
+static inline void x86_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ int err;
+ err = checking_wrmsrl(hwc->config_base + idx,
+ hwc->config);
+}
+
+static inline void
+intel_pmu_disable_fixed(struct hw_perf_counter *hwc, int __idx)
+{
+ int idx = __idx - X86_PMC_IDX_FIXED;
+ u64 ctrl_val, mask;
+ int err;
+
+ mask = 0xfULL << (idx * 4);
+
+ rdmsrl(hwc->config_base, ctrl_val);
+ ctrl_val &= ~mask;
+ err = checking_wrmsrl(hwc->config_base, ctrl_val);
+}
+
+static inline void
+intel_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
+ intel_pmu_disable_fixed(hwc, idx);
+ return;
+ }
+
+ x86_pmu_disable_counter(hwc, idx);
+}
+
+static inline void
+amd_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ x86_pmu_disable_counter(hwc, idx);
+}
+
+static DEFINE_PER_CPU(u64, prev_left[X86_PMC_IDX_MAX]);
+
+/*
+ * Set the next IRQ period, based on the hwc->period_left value.
+ * To be called with the counter disabled in hw:
+ */
+static int
+x86_perf_counter_set_period(struct perf_counter *counter,
+ struct hw_perf_counter *hwc, int idx)
+{
+ s64 left = atomic64_read(&hwc->period_left);
+ s64 period = hwc->sample_period;
+ int err, ret = 0;
+
+ /*
+ * If we are way outside a reasoable range then just skip forward:
+ */
+ if (unlikely(left <= -period)) {
+ left = period;
+ atomic64_set(&hwc->period_left, left);
+ hwc->last_period = period;
+ ret = 1;
+ }
+
+ if (unlikely(left <= 0)) {
+ left += period;
+ atomic64_set(&hwc->period_left, left);
+ hwc->last_period = period;
+ ret = 1;
+ }
+ /*
+ * Quirk: certain CPUs dont like it if just 1 event is left:
+ */
+ if (unlikely(left < 2))
+ left = 2;
+
+ if (left > x86_pmu.max_period)
+ left = x86_pmu.max_period;
+
+ per_cpu(prev_left[idx], smp_processor_id()) = left;
+
+ /*
+ * The hw counter starts counting from this counter offset,
+ * mark it to be able to extra future deltas:
+ */
+ atomic64_set(&hwc->prev_count, (u64)-left);
+
+ err = checking_wrmsrl(hwc->counter_base + idx,
+ (u64)(-left) & x86_pmu.counter_mask);
+
+ return ret;
+}
+
+static inline void
+intel_pmu_enable_fixed(struct hw_perf_counter *hwc, int __idx)
+{
+ int idx = __idx - X86_PMC_IDX_FIXED;
+ u64 ctrl_val, bits, mask;
+ int err;
+
+ /*
+ * Enable IRQ generation (0x8),
+ * and enable ring-3 counting (0x2) and ring-0 counting (0x1)
+ * if requested:
+ */
+ bits = 0x8ULL;
+ if (hwc->config & ARCH_PERFMON_EVENTSEL_USR)
+ bits |= 0x2;
+ if (hwc->config & ARCH_PERFMON_EVENTSEL_OS)
+ bits |= 0x1;
+ bits <<= (idx * 4);
+ mask = 0xfULL << (idx * 4);
+
+ rdmsrl(hwc->config_base, ctrl_val);
+ ctrl_val &= ~mask;
+ ctrl_val |= bits;
+ err = checking_wrmsrl(hwc->config_base, ctrl_val);
+}
+
+static void intel_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
+ intel_pmu_enable_fixed(hwc, idx);
+ return;
+ }
+
+ x86_pmu_enable_counter(hwc, idx);
+}
+
+static void amd_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+
+ if (cpuc->enabled)
+ x86_pmu_enable_counter(hwc, idx);
+ else
+ x86_pmu_disable_counter(hwc, idx);
+}
+
+static int
+fixed_mode_idx(struct perf_counter *counter, struct hw_perf_counter *hwc)
+{
+ unsigned int event;
+
+ if (!x86_pmu.num_counters_fixed)
+ return -1;
+
+ event = hwc->config & ARCH_PERFMON_EVENT_MASK;
+
+ if (unlikely(event == x86_pmu.event_map(PERF_COUNT_HW_INSTRUCTIONS)))
+ return X86_PMC_IDX_FIXED_INSTRUCTIONS;
+ if (unlikely(event == x86_pmu.event_map(PERF_COUNT_HW_CPU_CYCLES)))
+ return X86_PMC_IDX_FIXED_CPU_CYCLES;
+ if (unlikely(event == x86_pmu.event_map(PERF_COUNT_HW_BUS_CYCLES)))
+ return X86_PMC_IDX_FIXED_BUS_CYCLES;
+
+ return -1;
+}
+
+/*
+ * Find a PMC slot for the freshly enabled / scheduled in counter:
+ */
+static int x86_pmu_enable(struct perf_counter *counter)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ struct hw_perf_counter *hwc = &counter->hw;
+ int idx;
+
+ idx = fixed_mode_idx(counter, hwc);
+ if (idx >= 0) {
+ /*
+ * Try to get the fixed counter, if that is already taken
+ * then try to get a generic counter:
+ */
+ if (test_and_set_bit(idx, cpuc->used_mask))
+ goto try_generic;
+
+ hwc->config_base = MSR_ARCH_PERFMON_FIXED_CTR_CTRL;
+ /*
+ * We set it so that counter_base + idx in wrmsr/rdmsr maps to
+ * MSR_ARCH_PERFMON_FIXED_CTR0 ... CTR2:
+ */
+ hwc->counter_base =
+ MSR_ARCH_PERFMON_FIXED_CTR0 - X86_PMC_IDX_FIXED;
+ hwc->idx = idx;
+ } else {
+ idx = hwc->idx;
+ /* Try to get the previous generic counter again */
+ if (test_and_set_bit(idx, cpuc->used_mask)) {
+try_generic:
+ idx = find_first_zero_bit(cpuc->used_mask,
+ x86_pmu.num_counters);
+ if (idx == x86_pmu.num_counters)
+ return -EAGAIN;
+
+ set_bit(idx, cpuc->used_mask);
+ hwc->idx = idx;
+ }
+ hwc->config_base = x86_pmu.eventsel;
+ hwc->counter_base = x86_pmu.perfctr;
+ }
+
+ perf_counters_lapic_init();
+
+ x86_pmu.disable(hwc, idx);
+
+ cpuc->counters[idx] = counter;
+ set_bit(idx, cpuc->active_mask);
+
+ x86_perf_counter_set_period(counter, hwc, idx);
+ x86_pmu.enable(hwc, idx);
+
+ return 0;
+}
+
+static void x86_pmu_unthrottle(struct perf_counter *counter)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ struct hw_perf_counter *hwc = &counter->hw;
+
+ if (WARN_ON_ONCE(hwc->idx >= X86_PMC_IDX_MAX ||
+ cpuc->counters[hwc->idx] != counter))
+ return;
+
+ x86_pmu.enable(hwc, hwc->idx);
+}
+
+void perf_counter_print_debug(void)
+{
+ u64 ctrl, status, overflow, pmc_ctrl, pmc_count, prev_left, fixed;
+ struct cpu_hw_counters *cpuc;
+ unsigned long flags;
+ int cpu, idx;
+
+ if (!x86_pmu.num_counters)
+ return;
+
+ local_irq_save(flags);
+
+ cpu = smp_processor_id();
+ cpuc = &per_cpu(cpu_hw_counters, cpu);
+
+ if (x86_pmu.version >= 2) {
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, ctrl);
+ rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);
+ rdmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, overflow);
+ rdmsrl(MSR_ARCH_PERFMON_FIXED_CTR_CTRL, fixed);
+
+ pr_info("\n");
+ pr_info("CPU#%d: ctrl: %016llx\n", cpu, ctrl);
+ pr_info("CPU#%d: status: %016llx\n", cpu, status);
+ pr_info("CPU#%d: overflow: %016llx\n", cpu, overflow);
+ pr_info("CPU#%d: fixed: %016llx\n", cpu, fixed);
+ }
+ pr_info("CPU#%d: used: %016llx\n", cpu, *(u64 *)cpuc->used_mask);
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ rdmsrl(x86_pmu.eventsel + idx, pmc_ctrl);
+ rdmsrl(x86_pmu.perfctr + idx, pmc_count);
+
+ prev_left = per_cpu(prev_left[idx], cpu);
+
+ pr_info("CPU#%d: gen-PMC%d ctrl: %016llx\n",
+ cpu, idx, pmc_ctrl);
+ pr_info("CPU#%d: gen-PMC%d count: %016llx\n",
+ cpu, idx, pmc_count);
+ pr_info("CPU#%d: gen-PMC%d left: %016llx\n",
+ cpu, idx, prev_left);
+ }
+ for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++) {
+ rdmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, pmc_count);
+
+ pr_info("CPU#%d: fixed-PMC%d count: %016llx\n",
+ cpu, idx, pmc_count);
+ }
+ local_irq_restore(flags);
+}
+
+static void x86_pmu_disable(struct perf_counter *counter)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ struct hw_perf_counter *hwc = &counter->hw;
+ int idx = hwc->idx;
+
+ /*
+ * Must be done before we disable, otherwise the nmi handler
+ * could reenable again:
+ */
+ clear_bit(idx, cpuc->active_mask);
+ x86_pmu.disable(hwc, idx);
+
+ /*
+ * Make sure the cleared pointer becomes visible before we
+ * (potentially) free the counter:
+ */
+ barrier();
+
+ /*
+ * Drain the remaining delta count out of a counter
+ * that we are disabling:
+ */
+ x86_perf_counter_update(counter, hwc, idx);
+ cpuc->counters[idx] = NULL;
+ clear_bit(idx, cpuc->used_mask);
+}
+
+/*
+ * Save and restart an expired counter. Called by NMI contexts,
+ * so it has to be careful about preempting normal counter ops:
+ */
+static int intel_pmu_save_and_restart(struct perf_counter *counter)
+{
+ struct hw_perf_counter *hwc = &counter->hw;
+ int idx = hwc->idx;
+ int ret;
+
+ x86_perf_counter_update(counter, hwc, idx);
+ ret = x86_perf_counter_set_period(counter, hwc, idx);
+
+ if (counter->state == PERF_COUNTER_STATE_ACTIVE)
+ intel_pmu_enable_counter(hwc, idx);
+
+ return ret;
+}
+
+static void intel_pmu_reset(void)
+{
+ unsigned long flags;
+ int idx;
+
+ if (!x86_pmu.num_counters)
+ return;
+
+ local_irq_save(flags);
+
+ printk("clearing PMU state on CPU#%d\n", smp_processor_id());
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ checking_wrmsrl(x86_pmu.eventsel + idx, 0ull);
+ checking_wrmsrl(x86_pmu.perfctr + idx, 0ull);
+ }
+ for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++) {
+ checking_wrmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, 0ull);
+ }
+
+ local_irq_restore(flags);
+}
+
+
+/*
+ * This handler is triggered by the local APIC, so the APIC IRQ handling
+ * rules apply:
+ */
+static int intel_pmu_handle_irq(struct pt_regs *regs)
+{
+ struct perf_sample_data data;
+ struct cpu_hw_counters *cpuc;
+ int bit, cpu, loops;
+ u64 ack, status;
+
+ data.regs = regs;
+ data.addr = 0;
+
+ cpu = smp_processor_id();
+ cpuc = &per_cpu(cpu_hw_counters, cpu);
+
+ perf_disable();
+ status = intel_pmu_get_status();
+ if (!status) {
+ perf_enable();
+ return 0;
+ }
+
+ loops = 0;
+again:
+ if (++loops > 100) {
+ WARN_ONCE(1, "perfcounters: irq loop stuck!\n");
+ perf_counter_print_debug();
+ intel_pmu_reset();
+ perf_enable();
+ return 1;
+ }
+
+ inc_irq_stat(apic_perf_irqs);
+ ack = status;
+ for_each_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) {
+ struct perf_counter *counter = cpuc->counters[bit];
+
+ clear_bit(bit, (unsigned long *) &status);
+ if (!test_bit(bit, cpuc->active_mask))
+ continue;
+
+ if (!intel_pmu_save_and_restart(counter))
+ continue;
+
+ if (perf_counter_overflow(counter, 1, &data))
+ intel_pmu_disable_counter(&counter->hw, bit);
+ }
+
+ intel_pmu_ack_status(ack);
+
+ /*
+ * Repeat if there is more work to be done:
+ */
+ status = intel_pmu_get_status();
+ if (status)
+ goto again;
+
+ perf_enable();
+
+ return 1;
+}
+
+static int amd_pmu_handle_irq(struct pt_regs *regs)
+{
+ struct perf_sample_data data;
+ struct cpu_hw_counters *cpuc;
+ struct perf_counter *counter;
+ struct hw_perf_counter *hwc;
+ int cpu, idx, handled = 0;
+ u64 val;
+
+ data.regs = regs;
+ data.addr = 0;
+
+ cpu = smp_processor_id();
+ cpuc = &per_cpu(cpu_hw_counters, cpu);
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ counter = cpuc->counters[idx];
+ hwc = &counter->hw;
+
+ val = x86_perf_counter_update(counter, hwc, idx);
+ if (val & (1ULL << (x86_pmu.counter_bits - 1)))
+ continue;
+
+ /*
+ * counter overflow
+ */
+ handled = 1;
+ data.period = counter->hw.last_period;
+
+ if (!x86_perf_counter_set_period(counter, hwc, idx))
+ continue;
+
+ if (perf_counter_overflow(counter, 1, &data))
+ amd_pmu_disable_counter(hwc, idx);
+ }
+
+ if (handled)
+ inc_irq_stat(apic_perf_irqs);
+
+ return handled;
+}
+
+void smp_perf_pending_interrupt(struct pt_regs *regs)
+{
+ irq_enter();
+ ack_APIC_irq();
+ inc_irq_stat(apic_pending_irqs);
+ perf_counter_do_pending();
+ irq_exit();
+}
+
+void set_perf_counter_pending(void)
+{
+ apic->send_IPI_self(LOCAL_PENDING_VECTOR);
+}
+
+void perf_counters_lapic_init(void)
+{
+ if (!x86_pmu_initialized())
+ return;
+
+ /*
+ * Always use NMI for PMU
+ */
+ apic_write(APIC_LVTPC, APIC_DM_NMI);
+}
+
+static int __kprobes
+perf_counter_nmi_handler(struct notifier_block *self,
+ unsigned long cmd, void *__args)
+{
+ struct die_args *args = __args;
+ struct pt_regs *regs;
+
+ if (!atomic_read(&active_counters))
+ return NOTIFY_DONE;
+
+ switch (cmd) {
+ case DIE_NMI:
+ case DIE_NMI_IPI:
+ break;
+
+ default:
+ return NOTIFY_DONE;
+ }
+
+ regs = args->regs;
+
+ apic_write(APIC_LVTPC, APIC_DM_NMI);
+ /*
+ * Can't rely on the handled return value to say it was our NMI, two
+ * counters could trigger 'simultaneously' raising two back-to-back NMIs.
+ *
+ * If the first NMI handles both, the latter will be empty and daze
+ * the CPU.
+ */
+ x86_pmu.handle_irq(regs);
+
+ return NOTIFY_STOP;
+}
+
+static __read_mostly struct notifier_block perf_counter_nmi_notifier = {
+ .notifier_call = perf_counter_nmi_handler,
+ .next = NULL,
+ .priority = 1
+};
+
+static struct x86_pmu intel_pmu = {
+ .name = "Intel",
+ .handle_irq = intel_pmu_handle_irq,
+ .disable_all = intel_pmu_disable_all,
+ .enable_all = intel_pmu_enable_all,
+ .enable = intel_pmu_enable_counter,
+ .disable = intel_pmu_disable_counter,
+ .eventsel = MSR_ARCH_PERFMON_EVENTSEL0,
+ .perfctr = MSR_ARCH_PERFMON_PERFCTR0,
+ .event_map = intel_pmu_event_map,
+ .raw_event = intel_pmu_raw_event,
+ .max_events = ARRAY_SIZE(intel_perfmon_event_map),
+ /*
+ * Intel PMCs cannot be accessed sanely above 32 bit width,
+ * so we install an artificial 1<<31 period regardless of
+ * the generic counter period:
+ */
+ .max_period = (1ULL << 31) - 1,
+};
+
+static struct x86_pmu amd_pmu = {
+ .name = "AMD",
+ .handle_irq = amd_pmu_handle_irq,
+ .disable_all = amd_pmu_disable_all,
+ .enable_all = amd_pmu_enable_all,
+ .enable = amd_pmu_enable_counter,
+ .disable = amd_pmu_disable_counter,
+ .eventsel = MSR_K7_EVNTSEL0,
+ .perfctr = MSR_K7_PERFCTR0,
+ .event_map = amd_pmu_event_map,
+ .raw_event = amd_pmu_raw_event,
+ .max_events = ARRAY_SIZE(amd_perfmon_event_map),
+ .num_counters = 4,
+ .counter_bits = 48,
+ .counter_mask = (1ULL << 48) - 1,
+ /* use highest bit to detect overflow */
+ .max_period = (1ULL << 47) - 1,
+};
+
+static int intel_pmu_init(void)
+{
+ union cpuid10_edx edx;
+ union cpuid10_eax eax;
+ unsigned int unused;
+ unsigned int ebx;
+ int version;
+
+ if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON))
+ return -ENODEV;
+
+ /*
+ * Check whether the Architectural PerfMon supports
+ * Branch Misses Retired Event or not.
+ */
+ cpuid(10, &eax.full, &ebx, &unused, &edx.full);
+ if (eax.split.mask_length <= ARCH_PERFMON_BRANCH_MISSES_RETIRED)
+ return -ENODEV;
+
+ version = eax.split.version_id;
+ if (version < 2)
+ return -ENODEV;
+
+ x86_pmu = intel_pmu;
+ x86_pmu.version = version;
+ x86_pmu.num_counters = eax.split.num_counters;
+ x86_pmu.counter_bits = eax.split.bit_width;
+ x86_pmu.counter_mask = (1ULL << eax.split.bit_width) - 1;
+
+ /*
+ * Quirk: v2 perfmon does not report fixed-purpose counters, so
+ * assume at least 3 counters:
+ */
+ x86_pmu.num_counters_fixed = max((int)edx.split.num_counters_fixed, 3);
+
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl);
+
+ /*
+ * Install the hw-cache-events table:
+ */
+ switch (boot_cpu_data.x86_model) {
+ case 15: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
+ case 22: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
+ case 23: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
+ case 29: /* six-core 45 nm xeon "Dunnington" */
+ memcpy(hw_cache_event_ids, core2_hw_cache_event_ids,
+ sizeof(hw_cache_event_ids));
+
+ pr_cont("Core2 events, ");
+ break;
+ default:
+ case 26:
+ memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids,
+ sizeof(hw_cache_event_ids));
+
+ pr_cont("Nehalem/Corei7 events, ");
+ break;
+ case 28:
+ memcpy(hw_cache_event_ids, atom_hw_cache_event_ids,
+ sizeof(hw_cache_event_ids));
+
+ pr_cont("Atom events, ");
+ break;
+ }
+ return 0;
+}
+
+static int amd_pmu_init(void)
+{
+ x86_pmu = amd_pmu;
+
+ switch (boot_cpu_data.x86) {
+ case 0x0f:
+ case 0x10:
+ case 0x11:
+ memcpy(hw_cache_event_ids, amd_0f_hw_cache_event_ids,
+ sizeof(hw_cache_event_ids));
+
+ pr_cont("AMD Family 0f/10/11 events, ");
+ break;
+ }
+ return 0;
+}
+
+void __init init_hw_perf_counters(void)
+{
+ int err;
+
+ pr_info("Performance Counters: ");
+
+ switch (boot_cpu_data.x86_vendor) {
+ case X86_VENDOR_INTEL:
+ err = intel_pmu_init();
+ break;
+ case X86_VENDOR_AMD:
+ err = amd_pmu_init();
+ break;
+ default:
+ return;
+ }
+ if (err != 0) {
+ pr_cont("no PMU driver, software counters only.\n");
+ return;
+ }
+
+ pr_cont("%s PMU driver.\n", x86_pmu.name);
+
+ if (x86_pmu.num_counters > X86_PMC_MAX_GENERIC) {
+ x86_pmu.num_counters = X86_PMC_MAX_GENERIC;
+ WARN(1, KERN_ERR "hw perf counters %d > max(%d), clipping!",
+ x86_pmu.num_counters, X86_PMC_MAX_GENERIC);
+ }
+ perf_counter_mask = (1 << x86_pmu.num_counters) - 1;
+ perf_max_counters = x86_pmu.num_counters;
+
+ if (x86_pmu.num_counters_fixed > X86_PMC_MAX_FIXED) {
+ x86_pmu.num_counters_fixed = X86_PMC_MAX_FIXED;
+ WARN(1, KERN_ERR "hw perf counters fixed %d > max(%d), clipping!",
+ x86_pmu.num_counters_fixed, X86_PMC_MAX_FIXED);
+ }
+
+ perf_counter_mask |=
+ ((1LL << x86_pmu.num_counters_fixed)-1) << X86_PMC_IDX_FIXED;
+
+ perf_counters_lapic_init();
+ register_die_notifier(&perf_counter_nmi_notifier);
+
+ pr_info("... version: %d\n", x86_pmu.version);
+ pr_info("... bit width: %d\n", x86_pmu.counter_bits);
+ pr_info("... generic counters: %d\n", x86_pmu.num_counters);
+ pr_info("... value mask: %016Lx\n", x86_pmu.counter_mask);
+ pr_info("... max period: %016Lx\n", x86_pmu.max_period);
+ pr_info("... fixed-purpose counters: %d\n", x86_pmu.num_counters_fixed);
+ pr_info("... counter mask: %016Lx\n", perf_counter_mask);
+}
+
+static inline void x86_pmu_read(struct perf_counter *counter)
+{
+ x86_perf_counter_update(counter, &counter->hw, counter->hw.idx);
+}
+
+static const struct pmu pmu = {
+ .enable = x86_pmu_enable,
+ .disable = x86_pmu_disable,
+ .read = x86_pmu_read,
+ .unthrottle = x86_pmu_unthrottle,
+};
+
+const struct pmu *hw_perf_counter_init(struct perf_counter *counter)
+{
+ int err;
+
+ err = __hw_perf_counter_init(counter);
+ if (err)
+ return ERR_PTR(err);
+
+ return &pmu;
+}
+
+/*
+ * callchain support
+ */
+
+static inline
+void callchain_store(struct perf_callchain_entry *entry, unsigned long ip)
+{
+ if (entry->nr < MAX_STACK_DEPTH)
+ entry->ip[entry->nr++] = ip;
+}
+
+static DEFINE_PER_CPU(struct perf_callchain_entry, irq_entry);
+static DEFINE_PER_CPU(struct perf_callchain_entry, nmi_entry);
+
+
+static void
+backtrace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ /* Ignore warnings */
+}
+
+static void backtrace_warning(void *data, char *msg)
+{
+ /* Ignore warnings */
+}
+
+static int backtrace_stack(void *data, char *name)
+{
+ /* Don't bother with IRQ stacks for now */
+ return -1;
+}
+
+static void backtrace_address(void *data, unsigned long addr, int reliable)
+{
+ struct perf_callchain_entry *entry = data;
+
+ if (reliable)
+ callchain_store(entry, addr);
+}
+
+static const struct stacktrace_ops backtrace_ops = {
+ .warning = backtrace_warning,
+ .warning_symbol = backtrace_warning_symbol,
+ .stack = backtrace_stack,
+ .address = backtrace_address,
+};
+
+static void
+perf_callchain_kernel(struct pt_regs *regs, struct perf_callchain_entry *entry)
+{
+ unsigned long bp;
+ char *stack;
+ int nr = entry->nr;
+
+ callchain_store(entry, instruction_pointer(regs));
+
+ stack = ((char *)regs + sizeof(struct pt_regs));
+#ifdef CONFIG_FRAME_POINTER
+ bp = frame_pointer(regs);
+#else
+ bp = 0;
+#endif
+
+ dump_trace(NULL, regs, (void *)stack, bp, &backtrace_ops, entry);
+
+ entry->kernel = entry->nr - nr;
+}
+
+
+struct stack_frame {
+ const void __user *next_fp;
+ unsigned long return_address;
+};
+
+static int copy_stack_frame(const void __user *fp, struct stack_frame *frame)
+{
+ int ret;
+
+ if (!access_ok(VERIFY_READ, fp, sizeof(*frame)))
+ return 0;
+
+ ret = 1;
+ pagefault_disable();
+ if (__copy_from_user_inatomic(frame, fp, sizeof(*frame)))
+ ret = 0;
+ pagefault_enable();
+
+ return ret;
+}
+
+static void
+perf_callchain_user(struct pt_regs *regs, struct perf_callchain_entry *entry)
+{
+ struct stack_frame frame;
+ const void __user *fp;
+ int nr = entry->nr;
+
+ regs = (struct pt_regs *)current->thread.sp0 - 1;
+ fp = (void __user *)regs->bp;
+
+ callchain_store(entry, regs->ip);
+
+ while (entry->nr < MAX_STACK_DEPTH) {
+ frame.next_fp = NULL;
+ frame.return_address = 0;
+
+ if (!copy_stack_frame(fp, &frame))
+ break;
+
+ if ((unsigned long)fp < user_stack_pointer(regs))
+ break;
+
+ callchain_store(entry, frame.return_address);
+ fp = frame.next_fp;
+ }
+
+ entry->user = entry->nr - nr;
+}
+
+static void
+perf_do_callchain(struct pt_regs *regs, struct perf_callchain_entry *entry)
+{
+ int is_user;
+
+ if (!regs)
+ return;
+
+ is_user = user_mode(regs);
+
+ if (!current || current->pid == 0)
+ return;
+
+ if (is_user && current->state != TASK_RUNNING)
+ return;
+
+ if (!is_user)
+ perf_callchain_kernel(regs, entry);
+
+ if (current->mm)
+ perf_callchain_user(regs, entry);
+}
+
+struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
+{
+ struct perf_callchain_entry *entry;
+
+ if (in_nmi())
+ entry = &__get_cpu_var(nmi_entry);
+ else
+ entry = &__get_cpu_var(irq_entry);
+
+ entry->nr = 0;
+ entry->hv = 0;
+ entry->kernel = 0;
+ entry->user = 0;
+
+ perf_do_callchain(regs, entry);
+
+ return entry;
+}
#include <linux/nmi.h>
#include <linux/kprobes.h>
-#include <asm/genapic.h>
-#include <asm/intel_arch_perfmon.h>
+#include <asm/apic.h>
+#include <asm/perf_counter.h>
struct nmi_watchdog_ctlblk {
unsigned int cccr_msr;
* Markus Metzger <markus.t.metzger@intel.com>, 2007-2009
*/
-
-#include <asm/ds.h>
-
-#include <linux/errno.h>
+#include <linux/kernel.h>
#include <linux/string.h>
-#include <linux/slab.h>
+#include <linux/errno.h>
#include <linux/sched.h>
+#include <linux/slab.h>
#include <linux/mm.h>
-#include <linux/kernel.h>
+#include <linux/trace_clock.h>
+
+#include <asm/ds.h>
+#include "ds_selftest.h"
/*
- * The configuration for a particular DS hardware implementation.
+ * The configuration for a particular DS hardware implementation:
*/
struct ds_configuration {
- /* the name of the configuration */
- const char *name;
- /* the size of one pointer-typed field in the DS structure and
- in the BTS and PEBS buffers in bytes;
- this covers the first 8 DS fields related to buffer management. */
- unsigned char sizeof_field;
- /* the size of a BTS/PEBS record in bytes */
- unsigned char sizeof_rec[2];
- /* a series of bit-masks to control various features indexed
- * by enum ds_feature */
- unsigned long ctl[dsf_ctl_max];
+ /* The name of the configuration: */
+ const char *name;
+
+ /* The size of pointer-typed fields in DS, BTS, and PEBS: */
+ unsigned char sizeof_ptr_field;
+
+ /* The size of a BTS/PEBS record in bytes: */
+ unsigned char sizeof_rec[2];
+
+ /* The number of pebs counter reset values in the DS structure. */
+ unsigned char nr_counter_reset;
+
+ /* Control bit-masks indexed by enum ds_feature: */
+ unsigned long ctl[dsf_ctl_max];
};
-static DEFINE_PER_CPU(struct ds_configuration, ds_cfg_array);
+static struct ds_configuration ds_cfg __read_mostly;
+
+
+/* Maximal size of a DS configuration: */
+#define MAX_SIZEOF_DS 0x80
-#define ds_cfg per_cpu(ds_cfg_array, smp_processor_id())
+/* Maximal size of a BTS record: */
+#define MAX_SIZEOF_BTS (3 * 8)
-#define MAX_SIZEOF_DS (12 * 8) /* maximal size of a DS configuration */
-#define MAX_SIZEOF_BTS (3 * 8) /* maximal size of a BTS record */
-#define DS_ALIGNMENT (1 << 3) /* BTS and PEBS buffer alignment */
+/* BTS and PEBS buffer alignment: */
+#define DS_ALIGNMENT (1 << 3)
-#define BTS_CONTROL \
- (ds_cfg.ctl[dsf_bts] | ds_cfg.ctl[dsf_bts_kernel] | ds_cfg.ctl[dsf_bts_user] |\
- ds_cfg.ctl[dsf_bts_overflow])
+/* Number of buffer pointers in DS: */
+#define NUM_DS_PTR_FIELDS 8
+/* Size of a pebs reset value in DS: */
+#define PEBS_RESET_FIELD_SIZE 8
+
+/* Mask of control bits in the DS MSR register: */
+#define BTS_CONTROL \
+ ( ds_cfg.ctl[dsf_bts] | \
+ ds_cfg.ctl[dsf_bts_kernel] | \
+ ds_cfg.ctl[dsf_bts_user] | \
+ ds_cfg.ctl[dsf_bts_overflow] )
/*
* A BTS or PEBS tracer.
* to identify tracers.
*/
struct ds_tracer {
- /* the DS context (partially) owned by this tracer */
- struct ds_context *context;
- /* the buffer provided on ds_request() and its size in bytes */
- void *buffer;
- size_t size;
+ /* The DS context (partially) owned by this tracer. */
+ struct ds_context *context;
+ /* The buffer provided on ds_request() and its size in bytes. */
+ void *buffer;
+ size_t size;
};
struct bts_tracer {
- /* the common DS part */
- struct ds_tracer ds;
- /* the trace including the DS configuration */
- struct bts_trace trace;
- /* buffer overflow notification function */
- bts_ovfl_callback_t ovfl;
+ /* The common DS part: */
+ struct ds_tracer ds;
+
+ /* The trace including the DS configuration: */
+ struct bts_trace trace;
+
+ /* Buffer overflow notification function: */
+ bts_ovfl_callback_t ovfl;
+
+ /* Active flags affecting trace collection. */
+ unsigned int flags;
};
struct pebs_tracer {
- /* the common DS part */
- struct ds_tracer ds;
- /* the trace including the DS configuration */
- struct pebs_trace trace;
- /* buffer overflow notification function */
- pebs_ovfl_callback_t ovfl;
+ /* The common DS part: */
+ struct ds_tracer ds;
+
+ /* The trace including the DS configuration: */
+ struct pebs_trace trace;
+
+ /* Buffer overflow notification function: */
+ pebs_ovfl_callback_t ovfl;
};
/*
*
* The DS configuration consists of the following fields; different
* architetures vary in the size of those fields.
+ *
* - double-word aligned base linear address of the BTS buffer
* - write pointer into the BTS buffer
* - end linear address of the BTS buffer (one byte beyond the end of
};
enum ds_qualifier {
- ds_bts = 0,
+ ds_bts = 0,
ds_pebs
};
-static inline unsigned long ds_get(const unsigned char *base,
- enum ds_qualifier qual, enum ds_field field)
+static inline unsigned long
+ds_get(const unsigned char *base, enum ds_qualifier qual, enum ds_field field)
{
- base += (ds_cfg.sizeof_field * (field + (4 * qual)));
+ base += (ds_cfg.sizeof_ptr_field * (field + (4 * qual)));
return *(unsigned long *)base;
}
-static inline void ds_set(unsigned char *base, enum ds_qualifier qual,
- enum ds_field field, unsigned long value)
+static inline void
+ds_set(unsigned char *base, enum ds_qualifier qual, enum ds_field field,
+ unsigned long value)
{
- base += (ds_cfg.sizeof_field * (field + (4 * qual)));
+ base += (ds_cfg.sizeof_ptr_field * (field + (4 * qual)));
(*(unsigned long *)base) = value;
}
*/
static DEFINE_SPINLOCK(ds_lock);
-
/*
* We either support (system-wide) per-cpu or per-thread allocation.
* We distinguish the two based on the task_struct pointer, where a
*/
static atomic_t tracers = ATOMIC_INIT(0);
-static inline void get_tracer(struct task_struct *task)
+static inline int get_tracer(struct task_struct *task)
{
- if (task)
+ int error;
+
+ spin_lock_irq(&ds_lock);
+
+ if (task) {
+ error = -EPERM;
+ if (atomic_read(&tracers) < 0)
+ goto out;
atomic_inc(&tracers);
- else
+ } else {
+ error = -EPERM;
+ if (atomic_read(&tracers) > 0)
+ goto out;
atomic_dec(&tracers);
+ }
+
+ error = 0;
+out:
+ spin_unlock_irq(&ds_lock);
+ return error;
}
static inline void put_tracer(struct task_struct *task)
atomic_inc(&tracers);
}
-static inline int check_tracer(struct task_struct *task)
-{
- return task ?
- (atomic_read(&tracers) >= 0) :
- (atomic_read(&tracers) <= 0);
-}
-
-
/*
* The DS context is either attached to a thread or to a cpu:
* - in the former case, the thread_struct contains a pointer to the
* deallocated when the last user puts the context.
*/
struct ds_context {
- /* pointer to the DS configuration; goes into MSR_IA32_DS_AREA */
- unsigned char ds[MAX_SIZEOF_DS];
- /* the owner of the BTS and PEBS configuration, respectively */
- struct bts_tracer *bts_master;
- struct pebs_tracer *pebs_master;
- /* use count */
- unsigned long count;
- /* a pointer to the context location inside the thread_struct
- * or the per_cpu context array */
- struct ds_context **this;
- /* a pointer to the task owning this context, or NULL, if the
- * context is owned by a cpu */
- struct task_struct *task;
-};
+ /* The DS configuration; goes into MSR_IA32_DS_AREA: */
+ unsigned char ds[MAX_SIZEOF_DS];
+
+ /* The owner of the BTS and PEBS configuration, respectively: */
+ struct bts_tracer *bts_master;
+ struct pebs_tracer *pebs_master;
-static DEFINE_PER_CPU(struct ds_context *, system_context_array);
+ /* Use count: */
+ unsigned long count;
-#define system_context per_cpu(system_context_array, smp_processor_id())
+ /* Pointer to the context pointer field: */
+ struct ds_context **this;
+
+ /* The traced task; NULL for cpu tracing: */
+ struct task_struct *task;
+
+ /* The traced cpu; only valid if task is NULL: */
+ int cpu;
+};
+static DEFINE_PER_CPU(struct ds_context *, cpu_context);
-static inline struct ds_context *ds_get_context(struct task_struct *task)
+
+static struct ds_context *ds_get_context(struct task_struct *task, int cpu)
{
struct ds_context **p_context =
- (task ? &task->thread.ds_ctx : &system_context);
+ (task ? &task->thread.ds_ctx : &per_cpu(cpu_context, cpu));
struct ds_context *context = NULL;
struct ds_context *new_context = NULL;
- unsigned long irq;
/* Chances are small that we already have a context. */
new_context = kzalloc(sizeof(*new_context), GFP_KERNEL);
if (!new_context)
return NULL;
- spin_lock_irqsave(&ds_lock, irq);
+ spin_lock_irq(&ds_lock);
context = *p_context;
- if (!context) {
+ if (likely(!context)) {
context = new_context;
context->this = p_context;
context->task = task;
+ context->cpu = cpu;
context->count = 0;
- if (task)
- set_tsk_thread_flag(task, TIF_DS_AREA_MSR);
-
- if (!task || (task == current))
- wrmsrl(MSR_IA32_DS_AREA, (unsigned long)context->ds);
-
*p_context = context;
}
context->count++;
- spin_unlock_irqrestore(&ds_lock, irq);
+ spin_unlock_irq(&ds_lock);
if (context != new_context)
kfree(new_context);
return context;
}
-static inline void ds_put_context(struct ds_context *context)
+static void ds_put_context(struct ds_context *context)
{
+ struct task_struct *task;
unsigned long irq;
if (!context)
*(context->this) = NULL;
- if (context->task)
- clear_tsk_thread_flag(context->task, TIF_DS_AREA_MSR);
+ task = context->task;
+
+ if (task)
+ clear_tsk_thread_flag(task, TIF_DS_AREA_MSR);
- if (!context->task || (context->task == current))
- wrmsrl(MSR_IA32_DS_AREA, 0);
+ /*
+ * We leave the (now dangling) pointer to the DS configuration in
+ * the DS_AREA msr. This is as good or as bad as replacing it with
+ * NULL - the hardware would crash if we enabled tracing.
+ *
+ * This saves us some problems with having to write an msr on a
+ * different cpu while preventing others from doing the same for the
+ * next context for that same cpu.
+ */
spin_unlock_irqrestore(&ds_lock, irq);
+ /* The context might still be in use for context switching. */
+ if (task && (task != current))
+ wait_task_context_switch(task);
+
kfree(context);
}
+static void ds_install_ds_area(struct ds_context *context)
+{
+ unsigned long ds;
+
+ ds = (unsigned long)context->ds;
+
+ /*
+ * There is a race between the bts master and the pebs master.
+ *
+ * The thread/cpu access is synchronized via get/put_cpu() for
+ * task tracing and via wrmsr_on_cpu for cpu tracing.
+ *
+ * If bts and pebs are collected for the same task or same cpu,
+ * the same confiuration is written twice.
+ */
+ if (context->task) {
+ get_cpu();
+ if (context->task == current)
+ wrmsrl(MSR_IA32_DS_AREA, ds);
+ set_tsk_thread_flag(context->task, TIF_DS_AREA_MSR);
+ put_cpu();
+ } else
+ wrmsr_on_cpu(context->cpu, MSR_IA32_DS_AREA,
+ (u32)((u64)ds), (u32)((u64)ds >> 32));
+}
/*
* Call the tracer's callback on a buffer overflow.
* The remainder of any partially written record is zeroed out.
*
* context: the DS context
- * qual: the buffer type
- * record: the data to write
- * size: the size of the data
+ * qual: the buffer type
+ * record: the data to write
+ * size: the size of the data
*/
static int ds_write(struct ds_context *context, enum ds_qualifier qual,
const void *record, size_t size)
unsigned long write_size, adj_write_size;
/*
- * write as much as possible without producing an
+ * Write as much as possible without producing an
* overflow interrupt.
*
- * interrupt_threshold must either be
+ * Interrupt_threshold must either be
* - bigger than absolute_maximum or
* - point to a record between buffer_base and absolute_maximum
*
- * index points to a valid record.
+ * Index points to a valid record.
*/
base = ds_get(context->ds, qual, ds_buffer_base);
index = ds_get(context->ds, qual, ds_index);
write_end = min(end, int_th);
- /* if we are already beyond the interrupt threshold,
- * we fill the entire buffer */
+ /*
+ * If we are already beyond the interrupt threshold,
+ * we fill the entire buffer.
+ */
if (write_end <= index)
write_end = end;
adj_write_size = write_size / ds_cfg.sizeof_rec[qual];
adj_write_size *= ds_cfg.sizeof_rec[qual];
- /* zero out trailing bytes */
+ /* Zero out trailing bytes. */
memset((char *)index + write_size, 0,
adj_write_size - write_size);
index += adj_write_size;
* Later architectures use 64bit pointers throughout, whereas earlier
* architectures use 32bit pointers in 32bit mode.
*
- * We compute the base address for the first 8 fields based on:
+ * We compute the base address for the fields based on:
* - the field size stored in the DS configuration
* - the relative field position
*
bts_to,
bts_flags,
- bts_qual = bts_from,
- bts_jiffies = bts_to,
- bts_pid = bts_flags,
+ bts_qual = bts_from,
+ bts_clock = bts_to,
+ bts_pid = bts_flags,
- bts_qual_mask = (bts_qual_max - 1),
- bts_escape = ((unsigned long)-1 & ~bts_qual_mask)
+ bts_qual_mask = (bts_qual_max - 1),
+ bts_escape = ((unsigned long)-1 & ~bts_qual_mask)
};
static inline unsigned long bts_get(const char *base, enum bts_field field)
{
- base += (ds_cfg.sizeof_field * field);
+ base += (ds_cfg.sizeof_ptr_field * field);
return *(unsigned long *)base;
}
static inline void bts_set(char *base, enum bts_field field, unsigned long val)
{
- base += (ds_cfg.sizeof_field * field);;
+ base += (ds_cfg.sizeof_ptr_field * field);;
(*(unsigned long *)base) = val;
}
*
* return: bytes read/written on success; -Eerrno, otherwise
*/
-static int bts_read(struct bts_tracer *tracer, const void *at,
- struct bts_struct *out)
+static int
+bts_read(struct bts_tracer *tracer, const void *at, struct bts_struct *out)
{
if (!tracer)
return -EINVAL;
memset(out, 0, sizeof(*out));
if ((bts_get(at, bts_qual) & ~bts_qual_mask) == bts_escape) {
out->qualifier = (bts_get(at, bts_qual) & bts_qual_mask);
- out->variant.timestamp.jiffies = bts_get(at, bts_jiffies);
- out->variant.timestamp.pid = bts_get(at, bts_pid);
+ out->variant.event.clock = bts_get(at, bts_clock);
+ out->variant.event.pid = bts_get(at, bts_pid);
} else {
out->qualifier = bts_branch;
out->variant.lbr.from = bts_get(at, bts_from);
case bts_task_arrives:
case bts_task_departs:
bts_set(raw, bts_qual, (bts_escape | in->qualifier));
- bts_set(raw, bts_jiffies, in->variant.timestamp.jiffies);
- bts_set(raw, bts_pid, in->variant.timestamp.pid);
+ bts_set(raw, bts_clock, in->variant.event.clock);
+ bts_set(raw, bts_pid, in->variant.event.pid);
break;
default:
return -EINVAL;
unsigned int flags) {
unsigned long buffer, adj;
- /* adjust the buffer address and size to meet alignment
+ /*
+ * Adjust the buffer address and size to meet alignment
* constraints:
* - buffer is double-word aligned
* - size is multiple of record size
trace->begin = (void *)buffer;
trace->top = trace->begin;
trace->end = (void *)(buffer + size);
- /* The value for 'no threshold' is -1, which will set the
+ /*
+ * The value for 'no threshold' is -1, which will set the
* threshold outside of the buffer, just like we want it.
*/
+ ith *= ds_cfg.sizeof_rec[qual];
trace->ith = (void *)(buffer + size - ith);
trace->flags = flags;
static int ds_request(struct ds_tracer *tracer, struct ds_trace *trace,
enum ds_qualifier qual, struct task_struct *task,
- void *base, size_t size, size_t th, unsigned int flags)
+ int cpu, void *base, size_t size, size_t th)
{
struct ds_context *context;
int error;
+ size_t req_size;
+
+ error = -EOPNOTSUPP;
+ if (!ds_cfg.sizeof_rec[qual])
+ goto out;
error = -EINVAL;
if (!base)
goto out;
- /* we require some space to do alignment adjustments below */
+ req_size = ds_cfg.sizeof_rec[qual];
+ /* We might need space for alignment adjustments. */
+ if (!IS_ALIGNED((unsigned long)base, DS_ALIGNMENT))
+ req_size += DS_ALIGNMENT;
+
error = -EINVAL;
- if (size < (DS_ALIGNMENT + ds_cfg.sizeof_rec[qual]))
+ if (size < req_size)
goto out;
if (th != (size_t)-1) {
tracer->size = size;
error = -ENOMEM;
- context = ds_get_context(task);
+ context = ds_get_context(task, cpu);
if (!context)
goto out;
tracer->context = context;
- ds_init_ds_trace(trace, qual, base, size, th, flags);
+ /*
+ * Defer any tracer-specific initialization work for the context until
+ * context ownership has been clarified.
+ */
error = 0;
out:
return error;
}
-struct bts_tracer *ds_request_bts(struct task_struct *task,
- void *base, size_t size,
- bts_ovfl_callback_t ovfl, size_t th,
- unsigned int flags)
+static struct bts_tracer *ds_request_bts(struct task_struct *task, int cpu,
+ void *base, size_t size,
+ bts_ovfl_callback_t ovfl, size_t th,
+ unsigned int flags)
{
struct bts_tracer *tracer;
- unsigned long irq;
int error;
+ /* Buffer overflow notification is not yet implemented. */
error = -EOPNOTSUPP;
- if (!ds_cfg.ctl[dsf_bts])
+ if (ovfl)
goto out;
- /* buffer overflow notification is not yet implemented */
- error = -EOPNOTSUPP;
- if (ovfl)
+ error = get_tracer(task);
+ if (error < 0)
goto out;
error = -ENOMEM;
tracer = kzalloc(sizeof(*tracer), GFP_KERNEL);
if (!tracer)
- goto out;
+ goto out_put_tracer;
tracer->ovfl = ovfl;
+ /* Do some more error checking and acquire a tracing context. */
error = ds_request(&tracer->ds, &tracer->trace.ds,
- ds_bts, task, base, size, th, flags);
+ ds_bts, task, cpu, base, size, th);
if (error < 0)
goto out_tracer;
-
- spin_lock_irqsave(&ds_lock, irq);
-
- error = -EPERM;
- if (!check_tracer(task))
- goto out_unlock;
- get_tracer(task);
+ /* Claim the bts part of the tracing context we acquired above. */
+ spin_lock_irq(&ds_lock);
error = -EPERM;
if (tracer->ds.context->bts_master)
- goto out_put_tracer;
+ goto out_unlock;
tracer->ds.context->bts_master = tracer;
- spin_unlock_irqrestore(&ds_lock, irq);
+ spin_unlock_irq(&ds_lock);
+ /*
+ * Now that we own the bts part of the context, let's complete the
+ * initialization for that part.
+ */
+ ds_init_ds_trace(&tracer->trace.ds, ds_bts, base, size, th, flags);
+ ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
+ ds_install_ds_area(tracer->ds.context);
tracer->trace.read = bts_read;
tracer->trace.write = bts_write;
- ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
+ /* Start tracing. */
ds_resume_bts(tracer);
return tracer;
- out_put_tracer:
- put_tracer(task);
out_unlock:
- spin_unlock_irqrestore(&ds_lock, irq);
+ spin_unlock_irq(&ds_lock);
ds_put_context(tracer->ds.context);
out_tracer:
kfree(tracer);
+ out_put_tracer:
+ put_tracer(task);
out:
return ERR_PTR(error);
}
-struct pebs_tracer *ds_request_pebs(struct task_struct *task,
- void *base, size_t size,
- pebs_ovfl_callback_t ovfl, size_t th,
- unsigned int flags)
+struct bts_tracer *ds_request_bts_task(struct task_struct *task,
+ void *base, size_t size,
+ bts_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags)
+{
+ return ds_request_bts(task, 0, base, size, ovfl, th, flags);
+}
+
+struct bts_tracer *ds_request_bts_cpu(int cpu, void *base, size_t size,
+ bts_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags)
+{
+ return ds_request_bts(NULL, cpu, base, size, ovfl, th, flags);
+}
+
+static struct pebs_tracer *ds_request_pebs(struct task_struct *task, int cpu,
+ void *base, size_t size,
+ pebs_ovfl_callback_t ovfl, size_t th,
+ unsigned int flags)
{
struct pebs_tracer *tracer;
- unsigned long irq;
int error;
- /* buffer overflow notification is not yet implemented */
+ /* Buffer overflow notification is not yet implemented. */
error = -EOPNOTSUPP;
if (ovfl)
goto out;
+ error = get_tracer(task);
+ if (error < 0)
+ goto out;
+
error = -ENOMEM;
tracer = kzalloc(sizeof(*tracer), GFP_KERNEL);
if (!tracer)
- goto out;
+ goto out_put_tracer;
tracer->ovfl = ovfl;
+ /* Do some more error checking and acquire a tracing context. */
error = ds_request(&tracer->ds, &tracer->trace.ds,
- ds_pebs, task, base, size, th, flags);
+ ds_pebs, task, cpu, base, size, th);
if (error < 0)
goto out_tracer;
- spin_lock_irqsave(&ds_lock, irq);
-
- error = -EPERM;
- if (!check_tracer(task))
- goto out_unlock;
- get_tracer(task);
+ /* Claim the pebs part of the tracing context we acquired above. */
+ spin_lock_irq(&ds_lock);
error = -EPERM;
if (tracer->ds.context->pebs_master)
- goto out_put_tracer;
+ goto out_unlock;
tracer->ds.context->pebs_master = tracer;
- spin_unlock_irqrestore(&ds_lock, irq);
+ spin_unlock_irq(&ds_lock);
+ /*
+ * Now that we own the pebs part of the context, let's complete the
+ * initialization for that part.
+ */
+ ds_init_ds_trace(&tracer->trace.ds, ds_pebs, base, size, th, flags);
ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_pebs);
+ ds_install_ds_area(tracer->ds.context);
+
+ /* Start tracing. */
ds_resume_pebs(tracer);
return tracer;
- out_put_tracer:
- put_tracer(task);
out_unlock:
- spin_unlock_irqrestore(&ds_lock, irq);
+ spin_unlock_irq(&ds_lock);
ds_put_context(tracer->ds.context);
out_tracer:
kfree(tracer);
+ out_put_tracer:
+ put_tracer(task);
out:
return ERR_PTR(error);
}
-void ds_release_bts(struct bts_tracer *tracer)
+struct pebs_tracer *ds_request_pebs_task(struct task_struct *task,
+ void *base, size_t size,
+ pebs_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags)
{
- if (!tracer)
- return;
+ return ds_request_pebs(task, 0, base, size, ovfl, th, flags);
+}
- ds_suspend_bts(tracer);
+struct pebs_tracer *ds_request_pebs_cpu(int cpu, void *base, size_t size,
+ pebs_ovfl_callback_t ovfl,
+ size_t th, unsigned int flags)
+{
+ return ds_request_pebs(NULL, cpu, base, size, ovfl, th, flags);
+}
+
+static void ds_free_bts(struct bts_tracer *tracer)
+{
+ struct task_struct *task;
+
+ task = tracer->ds.context->task;
WARN_ON_ONCE(tracer->ds.context->bts_master != tracer);
tracer->ds.context->bts_master = NULL;
- put_tracer(tracer->ds.context->task);
+ /* Make sure tracing stopped and the tracer is not in use. */
+ if (task && (task != current))
+ wait_task_context_switch(task);
+
ds_put_context(tracer->ds.context);
+ put_tracer(task);
kfree(tracer);
}
+void ds_release_bts(struct bts_tracer *tracer)
+{
+ might_sleep();
+
+ if (!tracer)
+ return;
+
+ ds_suspend_bts(tracer);
+ ds_free_bts(tracer);
+}
+
+int ds_release_bts_noirq(struct bts_tracer *tracer)
+{
+ struct task_struct *task;
+ unsigned long irq;
+ int error;
+
+ if (!tracer)
+ return 0;
+
+ task = tracer->ds.context->task;
+
+ local_irq_save(irq);
+
+ error = -EPERM;
+ if (!task &&
+ (tracer->ds.context->cpu != smp_processor_id()))
+ goto out;
+
+ error = -EPERM;
+ if (task && (task != current))
+ goto out;
+
+ ds_suspend_bts_noirq(tracer);
+ ds_free_bts(tracer);
+
+ error = 0;
+ out:
+ local_irq_restore(irq);
+ return error;
+}
+
+static void update_task_debugctlmsr(struct task_struct *task,
+ unsigned long debugctlmsr)
+{
+ task->thread.debugctlmsr = debugctlmsr;
+
+ get_cpu();
+ if (task == current)
+ update_debugctlmsr(debugctlmsr);
+ put_cpu();
+}
+
void ds_suspend_bts(struct bts_tracer *tracer)
{
struct task_struct *task;
+ unsigned long debugctlmsr;
+ int cpu;
if (!tracer)
return;
+ tracer->flags = 0;
+
task = tracer->ds.context->task;
+ cpu = tracer->ds.context->cpu;
- if (!task || (task == current))
- update_debugctlmsr(get_debugctlmsr() & ~BTS_CONTROL);
+ WARN_ON(!task && irqs_disabled());
- if (task) {
- task->thread.debugctlmsr &= ~BTS_CONTROL;
+ debugctlmsr = (task ?
+ task->thread.debugctlmsr :
+ get_debugctlmsr_on_cpu(cpu));
+ debugctlmsr &= ~BTS_CONTROL;
- if (!task->thread.debugctlmsr)
- clear_tsk_thread_flag(task, TIF_DEBUGCTLMSR);
- }
+ if (task)
+ update_task_debugctlmsr(task, debugctlmsr);
+ else
+ update_debugctlmsr_on_cpu(cpu, debugctlmsr);
}
-void ds_resume_bts(struct bts_tracer *tracer)
+int ds_suspend_bts_noirq(struct bts_tracer *tracer)
{
struct task_struct *task;
- unsigned long control;
+ unsigned long debugctlmsr, irq;
+ int cpu, error = 0;
if (!tracer)
- return;
+ return 0;
+
+ tracer->flags = 0;
task = tracer->ds.context->task;
+ cpu = tracer->ds.context->cpu;
+
+ local_irq_save(irq);
+
+ error = -EPERM;
+ if (!task && (cpu != smp_processor_id()))
+ goto out;
+
+ debugctlmsr = (task ?
+ task->thread.debugctlmsr :
+ get_debugctlmsr());
+ debugctlmsr &= ~BTS_CONTROL;
+
+ if (task)
+ update_task_debugctlmsr(task, debugctlmsr);
+ else
+ update_debugctlmsr(debugctlmsr);
+
+ error = 0;
+ out:
+ local_irq_restore(irq);
+ return error;
+}
+
+static unsigned long ds_bts_control(struct bts_tracer *tracer)
+{
+ unsigned long control;
control = ds_cfg.ctl[dsf_bts];
if (!(tracer->trace.ds.flags & BTS_KERNEL))
if (!(tracer->trace.ds.flags & BTS_USER))
control |= ds_cfg.ctl[dsf_bts_user];
- if (task) {
- task->thread.debugctlmsr |= control;
- set_tsk_thread_flag(task, TIF_DEBUGCTLMSR);
- }
-
- if (!task || (task == current))
- update_debugctlmsr(get_debugctlmsr() | control);
+ return control;
}
-void ds_release_pebs(struct pebs_tracer *tracer)
+void ds_resume_bts(struct bts_tracer *tracer)
{
+ struct task_struct *task;
+ unsigned long debugctlmsr;
+ int cpu;
+
if (!tracer)
return;
- ds_suspend_pebs(tracer);
+ tracer->flags = tracer->trace.ds.flags;
+
+ task = tracer->ds.context->task;
+ cpu = tracer->ds.context->cpu;
+
+ WARN_ON(!task && irqs_disabled());
+
+ debugctlmsr = (task ?
+ task->thread.debugctlmsr :
+ get_debugctlmsr_on_cpu(cpu));
+ debugctlmsr |= ds_bts_control(tracer);
+
+ if (task)
+ update_task_debugctlmsr(task, debugctlmsr);
+ else
+ update_debugctlmsr_on_cpu(cpu, debugctlmsr);
+}
+
+int ds_resume_bts_noirq(struct bts_tracer *tracer)
+{
+ struct task_struct *task;
+ unsigned long debugctlmsr, irq;
+ int cpu, error = 0;
+
+ if (!tracer)
+ return 0;
+
+ tracer->flags = tracer->trace.ds.flags;
+
+ task = tracer->ds.context->task;
+ cpu = tracer->ds.context->cpu;
+
+ local_irq_save(irq);
+
+ error = -EPERM;
+ if (!task && (cpu != smp_processor_id()))
+ goto out;
+
+ debugctlmsr = (task ?
+ task->thread.debugctlmsr :
+ get_debugctlmsr());
+ debugctlmsr |= ds_bts_control(tracer);
+
+ if (task)
+ update_task_debugctlmsr(task, debugctlmsr);
+ else
+ update_debugctlmsr(debugctlmsr);
+
+ error = 0;
+ out:
+ local_irq_restore(irq);
+ return error;
+}
+
+static void ds_free_pebs(struct pebs_tracer *tracer)
+{
+ struct task_struct *task;
+
+ task = tracer->ds.context->task;
WARN_ON_ONCE(tracer->ds.context->pebs_master != tracer);
tracer->ds.context->pebs_master = NULL;
- put_tracer(tracer->ds.context->task);
ds_put_context(tracer->ds.context);
+ put_tracer(task);
kfree(tracer);
}
+void ds_release_pebs(struct pebs_tracer *tracer)
+{
+ might_sleep();
+
+ if (!tracer)
+ return;
+
+ ds_suspend_pebs(tracer);
+ ds_free_pebs(tracer);
+}
+
+int ds_release_pebs_noirq(struct pebs_tracer *tracer)
+{
+ struct task_struct *task;
+ unsigned long irq;
+ int error;
+
+ if (!tracer)
+ return 0;
+
+ task = tracer->ds.context->task;
+
+ local_irq_save(irq);
+
+ error = -EPERM;
+ if (!task &&
+ (tracer->ds.context->cpu != smp_processor_id()))
+ goto out;
+
+ error = -EPERM;
+ if (task && (task != current))
+ goto out;
+
+ ds_suspend_pebs_noirq(tracer);
+ ds_free_pebs(tracer);
+
+ error = 0;
+ out:
+ local_irq_restore(irq);
+ return error;
+}
+
void ds_suspend_pebs(struct pebs_tracer *tracer)
{
}
+int ds_suspend_pebs_noirq(struct pebs_tracer *tracer)
+{
+ return 0;
+}
+
void ds_resume_pebs(struct pebs_tracer *tracer)
{
}
+int ds_resume_pebs_noirq(struct pebs_tracer *tracer)
+{
+ return 0;
+}
+
const struct bts_trace *ds_read_bts(struct bts_tracer *tracer)
{
if (!tracer)
return NULL;
ds_read_config(tracer->ds.context, &tracer->trace.ds, ds_pebs);
- tracer->trace.reset_value =
- *(u64 *)(tracer->ds.context->ds + (ds_cfg.sizeof_field * 8));
+
+ tracer->trace.counters = ds_cfg.nr_counter_reset;
+ memcpy(tracer->trace.counter_reset,
+ tracer->ds.context->ds +
+ (NUM_DS_PTR_FIELDS * ds_cfg.sizeof_ptr_field),
+ ds_cfg.nr_counter_reset * PEBS_RESET_FIELD_SIZE);
return &tracer->trace;
}
tracer->trace.ds.top = tracer->trace.ds.begin;
- ds_set(tracer->ds.context->ds, ds_bts, ds_index,
+ ds_set(tracer->ds.context->ds, ds_pebs, ds_index,
(unsigned long)tracer->trace.ds.top);
return 0;
}
-int ds_set_pebs_reset(struct pebs_tracer *tracer, u64 value)
+int ds_set_pebs_reset(struct pebs_tracer *tracer,
+ unsigned int counter, u64 value)
{
if (!tracer)
return -EINVAL;
- *(u64 *)(tracer->ds.context->ds + (ds_cfg.sizeof_field * 8)) = value;
+ if (ds_cfg.nr_counter_reset < counter)
+ return -EINVAL;
+
+ *(u64 *)(tracer->ds.context->ds +
+ (NUM_DS_PTR_FIELDS * ds_cfg.sizeof_ptr_field) +
+ (counter * PEBS_RESET_FIELD_SIZE)) = value;
return 0;
}
.ctl[dsf_bts] = (1 << 2) | (1 << 3),
.ctl[dsf_bts_kernel] = (1 << 5),
.ctl[dsf_bts_user] = (1 << 6),
-
- .sizeof_field = sizeof(long),
- .sizeof_rec[ds_bts] = sizeof(long) * 3,
-#ifdef __i386__
- .sizeof_rec[ds_pebs] = sizeof(long) * 10,
-#else
- .sizeof_rec[ds_pebs] = sizeof(long) * 18,
-#endif
+ .nr_counter_reset = 1,
};
static const struct ds_configuration ds_cfg_pentium_m = {
.name = "Pentium M",
.ctl[dsf_bts] = (1 << 6) | (1 << 7),
-
- .sizeof_field = sizeof(long),
- .sizeof_rec[ds_bts] = sizeof(long) * 3,
-#ifdef __i386__
- .sizeof_rec[ds_pebs] = sizeof(long) * 10,
-#else
- .sizeof_rec[ds_pebs] = sizeof(long) * 18,
-#endif
+ .nr_counter_reset = 1,
};
static const struct ds_configuration ds_cfg_core2_atom = {
.name = "Core 2/Atom",
.ctl[dsf_bts] = (1 << 6) | (1 << 7),
.ctl[dsf_bts_kernel] = (1 << 9),
.ctl[dsf_bts_user] = (1 << 10),
-
- .sizeof_field = 8,
- .sizeof_rec[ds_bts] = 8 * 3,
- .sizeof_rec[ds_pebs] = 8 * 18,
+ .nr_counter_reset = 1,
+};
+static const struct ds_configuration ds_cfg_core_i7 = {
+ .name = "Core i7",
+ .ctl[dsf_bts] = (1 << 6) | (1 << 7),
+ .ctl[dsf_bts_kernel] = (1 << 9),
+ .ctl[dsf_bts_user] = (1 << 10),
+ .nr_counter_reset = 4,
};
static void
-ds_configure(const struct ds_configuration *cfg)
+ds_configure(const struct ds_configuration *cfg,
+ struct cpuinfo_x86 *cpu)
{
+ unsigned long nr_pebs_fields = 0;
+
+ printk(KERN_INFO "[ds] using %s configuration\n", cfg->name);
+
+#ifdef __i386__
+ nr_pebs_fields = 10;
+#else
+ nr_pebs_fields = 18;
+#endif
+
+ /*
+ * Starting with version 2, architectural performance
+ * monitoring supports a format specifier.
+ */
+ if ((cpuid_eax(0xa) & 0xff) > 1) {
+ unsigned long perf_capabilities, format;
+
+ rdmsrl(MSR_IA32_PERF_CAPABILITIES, perf_capabilities);
+
+ format = (perf_capabilities >> 8) & 0xf;
+
+ switch (format) {
+ case 0:
+ nr_pebs_fields = 18;
+ break;
+ case 1:
+ nr_pebs_fields = 22;
+ break;
+ default:
+ printk(KERN_INFO
+ "[ds] unknown PEBS format: %lu\n", format);
+ nr_pebs_fields = 0;
+ break;
+ }
+ }
+
memset(&ds_cfg, 0, sizeof(ds_cfg));
ds_cfg = *cfg;
- printk(KERN_INFO "[ds] using %s configuration\n", ds_cfg.name);
+ ds_cfg.sizeof_ptr_field =
+ (cpu_has(cpu, X86_FEATURE_DTES64) ? 8 : 4);
+
+ ds_cfg.sizeof_rec[ds_bts] = ds_cfg.sizeof_ptr_field * 3;
+ ds_cfg.sizeof_rec[ds_pebs] = ds_cfg.sizeof_ptr_field * nr_pebs_fields;
- if (!cpu_has_bts) {
- ds_cfg.ctl[dsf_bts] = 0;
+ if (!cpu_has(cpu, X86_FEATURE_BTS)) {
+ ds_cfg.sizeof_rec[ds_bts] = 0;
printk(KERN_INFO "[ds] bts not available\n");
}
- if (!cpu_has_pebs)
+ if (!cpu_has(cpu, X86_FEATURE_PEBS)) {
+ ds_cfg.sizeof_rec[ds_pebs] = 0;
printk(KERN_INFO "[ds] pebs not available\n");
+ }
+
+ printk(KERN_INFO "[ds] sizes: address: %u bit, ",
+ 8 * ds_cfg.sizeof_ptr_field);
+ printk("bts/pebs record: %u/%u bytes\n",
+ ds_cfg.sizeof_rec[ds_bts], ds_cfg.sizeof_rec[ds_pebs]);
- WARN_ON_ONCE(MAX_SIZEOF_DS < (12 * ds_cfg.sizeof_field));
+ WARN_ON_ONCE(MAX_PEBS_COUNTERS < ds_cfg.nr_counter_reset);
}
void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
{
+ /* Only configure the first cpu. Others are identical. */
+ if (ds_cfg.name)
+ return;
+
switch (c->x86) {
case 0x6:
switch (c->x86_model) {
case 0x9:
case 0xd: /* Pentium M */
- ds_configure(&ds_cfg_pentium_m);
+ ds_configure(&ds_cfg_pentium_m, c);
break;
case 0xf:
case 0x17: /* Core2 */
case 0x1c: /* Atom */
- ds_configure(&ds_cfg_core2_atom);
+ ds_configure(&ds_cfg_core2_atom, c);
+ break;
+ case 0x1a: /* Core i7 */
+ ds_configure(&ds_cfg_core_i7, c);
break;
- case 0x1a: /* i7 */
default:
- /* sorry, don't know about them */
+ /* Sorry, don't know about them. */
break;
}
break;
case 0x0:
case 0x1:
case 0x2: /* Netburst */
- ds_configure(&ds_cfg_netburst);
+ ds_configure(&ds_cfg_netburst, c);
break;
default:
- /* sorry, don't know about them */
+ /* Sorry, don't know about them. */
break;
}
break;
default:
- /* sorry, don't know about them */
+ /* Sorry, don't know about them. */
break;
}
}
+static inline void ds_take_timestamp(struct ds_context *context,
+ enum bts_qualifier qualifier,
+ struct task_struct *task)
+{
+ struct bts_tracer *tracer = context->bts_master;
+ struct bts_struct ts;
+
+ /* Prevent compilers from reading the tracer pointer twice. */
+ barrier();
+
+ if (!tracer || !(tracer->flags & BTS_TIMESTAMPS))
+ return;
+
+ memset(&ts, 0, sizeof(ts));
+ ts.qualifier = qualifier;
+ ts.variant.event.clock = trace_clock_global();
+ ts.variant.event.pid = task->pid;
+
+ bts_write(tracer, &ts);
+}
+
/*
* Change the DS configuration from tracing prev to tracing next.
*/
void ds_switch_to(struct task_struct *prev, struct task_struct *next)
{
- struct ds_context *prev_ctx = prev->thread.ds_ctx;
- struct ds_context *next_ctx = next->thread.ds_ctx;
+ struct ds_context *prev_ctx = prev->thread.ds_ctx;
+ struct ds_context *next_ctx = next->thread.ds_ctx;
+ unsigned long debugctlmsr = next->thread.debugctlmsr;
+
+ /* Make sure all data is read before we start. */
+ barrier();
if (prev_ctx) {
update_debugctlmsr(0);
- if (prev_ctx->bts_master &&
- (prev_ctx->bts_master->trace.ds.flags & BTS_TIMESTAMPS)) {
- struct bts_struct ts = {
- .qualifier = bts_task_departs,
- .variant.timestamp.jiffies = jiffies_64,
- .variant.timestamp.pid = prev->pid
- };
- bts_write(prev_ctx->bts_master, &ts);
- }
+ ds_take_timestamp(prev_ctx, bts_task_departs, prev);
}
if (next_ctx) {
- if (next_ctx->bts_master &&
- (next_ctx->bts_master->trace.ds.flags & BTS_TIMESTAMPS)) {
- struct bts_struct ts = {
- .qualifier = bts_task_arrives,
- .variant.timestamp.jiffies = jiffies_64,
- .variant.timestamp.pid = next->pid
- };
- bts_write(next_ctx->bts_master, &ts);
- }
+ ds_take_timestamp(next_ctx, bts_task_arrives, next);
wrmsrl(MSR_IA32_DS_AREA, (unsigned long)next_ctx->ds);
}
- update_debugctlmsr(next->thread.debugctlmsr);
+ update_debugctlmsr(debugctlmsr);
}
-void ds_copy_thread(struct task_struct *tsk, struct task_struct *father)
+static __init int ds_selftest(void)
{
- clear_tsk_thread_flag(tsk, TIF_DS_AREA_MSR);
- tsk->thread.ds_ctx = NULL;
-}
+ if (ds_cfg.sizeof_rec[ds_bts]) {
+ int error;
-void ds_exit_thread(struct task_struct *tsk)
-{
+ error = ds_selftest_bts();
+ if (error) {
+ WARN(1, "[ds] selftest failed. disabling bts.\n");
+ ds_cfg.sizeof_rec[ds_bts] = 0;
+ }
+ }
+
+ if (ds_cfg.sizeof_rec[ds_pebs]) {
+ int error;
+
+ error = ds_selftest_pebs();
+ if (error) {
+ WARN(1, "[ds] selftest failed. disabling pebs.\n");
+ ds_cfg.sizeof_rec[ds_pebs] = 0;
+ }
+ }
+
+ return 0;
}
+device_initcall(ds_selftest);
--- /dev/null
+/*
+ * Debug Store support - selftest
+ *
+ *
+ * Copyright (C) 2009 Intel Corporation.
+ * Markus Metzger <markus.t.metzger@intel.com>, 2009
+ */
+
+#include "ds_selftest.h"
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/smp.h>
+#include <linux/cpu.h>
+
+#include <asm/ds.h>
+
+
+#define BUFFER_SIZE 521 /* Intentionally chose an odd size. */
+#define SMALL_BUFFER_SIZE 24 /* A single bts entry. */
+
+struct ds_selftest_bts_conf {
+ struct bts_tracer *tracer;
+ int error;
+ int (*suspend)(struct bts_tracer *);
+ int (*resume)(struct bts_tracer *);
+};
+
+static int ds_selftest_bts_consistency(const struct bts_trace *trace)
+{
+ int error = 0;
+
+ if (!trace) {
+ printk(KERN_CONT "failed to access trace...");
+ /* Bail out. Other tests are pointless. */
+ return -1;
+ }
+
+ if (!trace->read) {
+ printk(KERN_CONT "bts read not available...");
+ error = -1;
+ }
+
+ /* Do some sanity checks on the trace configuration. */
+ if (!trace->ds.n) {
+ printk(KERN_CONT "empty bts buffer...");
+ error = -1;
+ }
+ if (!trace->ds.size) {
+ printk(KERN_CONT "bad bts trace setup...");
+ error = -1;
+ }
+ if (trace->ds.end !=
+ (char *)trace->ds.begin + (trace->ds.n * trace->ds.size)) {
+ printk(KERN_CONT "bad bts buffer setup...");
+ error = -1;
+ }
+ /*
+ * We allow top in [begin; end], since its not clear when the
+ * overflow adjustment happens: after the increment or before the
+ * write.
+ */
+ if ((trace->ds.top < trace->ds.begin) ||
+ (trace->ds.end < trace->ds.top)) {
+ printk(KERN_CONT "bts top out of bounds...");
+ error = -1;
+ }
+
+ return error;
+}
+
+static int ds_selftest_bts_read(struct bts_tracer *tracer,
+ const struct bts_trace *trace,
+ const void *from, const void *to)
+{
+ const unsigned char *at;
+
+ /*
+ * Check a few things which do not belong to this test.
+ * They should be covered by other tests.
+ */
+ if (!trace)
+ return -1;
+
+ if (!trace->read)
+ return -1;
+
+ if (to < from)
+ return -1;
+
+ if (from < trace->ds.begin)
+ return -1;
+
+ if (trace->ds.end < to)
+ return -1;
+
+ if (!trace->ds.size)
+ return -1;
+
+ /* Now to the test itself. */
+ for (at = from; (void *)at < to; at += trace->ds.size) {
+ struct bts_struct bts;
+ unsigned long index;
+ int error;
+
+ if (((void *)at - trace->ds.begin) % trace->ds.size) {
+ printk(KERN_CONT
+ "read from non-integer index...");
+ return -1;
+ }
+ index = ((void *)at - trace->ds.begin) / trace->ds.size;
+
+ memset(&bts, 0, sizeof(bts));
+ error = trace->read(tracer, at, &bts);
+ if (error < 0) {
+ printk(KERN_CONT
+ "error reading bts trace at [%lu] (0x%p)...",
+ index, at);
+ return error;
+ }
+
+ switch (bts.qualifier) {
+ case BTS_BRANCH:
+ break;
+ default:
+ printk(KERN_CONT
+ "unexpected bts entry %llu at [%lu] (0x%p)...",
+ bts.qualifier, index, at);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static void ds_selftest_bts_cpu(void *arg)
+{
+ struct ds_selftest_bts_conf *conf = arg;
+ const struct bts_trace *trace;
+ void *top;
+
+ if (IS_ERR(conf->tracer)) {
+ conf->error = PTR_ERR(conf->tracer);
+ conf->tracer = NULL;
+
+ printk(KERN_CONT
+ "initialization failed (err: %d)...", conf->error);
+ return;
+ }
+
+ /* We should meanwhile have enough trace. */
+ conf->error = conf->suspend(conf->tracer);
+ if (conf->error < 0)
+ return;
+
+ /* Let's see if we can access the trace. */
+ trace = ds_read_bts(conf->tracer);
+
+ conf->error = ds_selftest_bts_consistency(trace);
+ if (conf->error < 0)
+ return;
+
+ /* If everything went well, we should have a few trace entries. */
+ if (trace->ds.top == trace->ds.begin) {
+ /*
+ * It is possible but highly unlikely that we got a
+ * buffer overflow and end up at exactly the same
+ * position we started from.
+ * Let's issue a warning, but continue.
+ */
+ printk(KERN_CONT "no trace/overflow...");
+ }
+
+ /* Let's try to read the trace we collected. */
+ conf->error =
+ ds_selftest_bts_read(conf->tracer, trace,
+ trace->ds.begin, trace->ds.top);
+ if (conf->error < 0)
+ return;
+
+ /*
+ * Let's read the trace again.
+ * Since we suspended tracing, we should get the same result.
+ */
+ top = trace->ds.top;
+
+ trace = ds_read_bts(conf->tracer);
+ conf->error = ds_selftest_bts_consistency(trace);
+ if (conf->error < 0)
+ return;
+
+ if (top != trace->ds.top) {
+ printk(KERN_CONT "suspend not working...");
+ conf->error = -1;
+ return;
+ }
+
+ /* Let's collect some more trace - see if resume is working. */
+ conf->error = conf->resume(conf->tracer);
+ if (conf->error < 0)
+ return;
+
+ conf->error = conf->suspend(conf->tracer);
+ if (conf->error < 0)
+ return;
+
+ trace = ds_read_bts(conf->tracer);
+
+ conf->error = ds_selftest_bts_consistency(trace);
+ if (conf->error < 0)
+ return;
+
+ if (trace->ds.top == top) {
+ /*
+ * It is possible but highly unlikely that we got a
+ * buffer overflow and end up at exactly the same
+ * position we started from.
+ * Let's issue a warning and check the full trace.
+ */
+ printk(KERN_CONT
+ "no resume progress/overflow...");
+
+ conf->error =
+ ds_selftest_bts_read(conf->tracer, trace,
+ trace->ds.begin, trace->ds.end);
+ } else if (trace->ds.top < top) {
+ /*
+ * We had a buffer overflow - the entire buffer should
+ * contain trace records.
+ */
+ conf->error =
+ ds_selftest_bts_read(conf->tracer, trace,
+ trace->ds.begin, trace->ds.end);
+ } else {
+ /*
+ * It is quite likely that the buffer did not overflow.
+ * Let's just check the delta trace.
+ */
+ conf->error =
+ ds_selftest_bts_read(conf->tracer, trace, top,
+ trace->ds.top);
+ }
+ if (conf->error < 0)
+ return;
+
+ conf->error = 0;
+}
+
+static int ds_suspend_bts_wrap(struct bts_tracer *tracer)
+{
+ ds_suspend_bts(tracer);
+ return 0;
+}
+
+static int ds_resume_bts_wrap(struct bts_tracer *tracer)
+{
+ ds_resume_bts(tracer);
+ return 0;
+}
+
+static void ds_release_bts_noirq_wrap(void *tracer)
+{
+ (void)ds_release_bts_noirq(tracer);
+}
+
+static int ds_selftest_bts_bad_release_noirq(int cpu,
+ struct bts_tracer *tracer)
+{
+ int error = -EPERM;
+
+ /* Try to release the tracer on the wrong cpu. */
+ get_cpu();
+ if (cpu != smp_processor_id()) {
+ error = ds_release_bts_noirq(tracer);
+ if (error != -EPERM)
+ printk(KERN_CONT "release on wrong cpu...");
+ }
+ put_cpu();
+
+ return error ? 0 : -1;
+}
+
+static int ds_selftest_bts_bad_request_cpu(int cpu, void *buffer)
+{
+ struct bts_tracer *tracer;
+ int error;
+
+ /* Try to request cpu tracing while task tracing is active. */
+ tracer = ds_request_bts_cpu(cpu, buffer, BUFFER_SIZE, NULL,
+ (size_t)-1, BTS_KERNEL);
+ error = PTR_ERR(tracer);
+ if (!IS_ERR(tracer)) {
+ ds_release_bts(tracer);
+ error = 0;
+ }
+
+ if (error != -EPERM)
+ printk(KERN_CONT "cpu/task tracing overlap...");
+
+ return error ? 0 : -1;
+}
+
+static int ds_selftest_bts_bad_request_task(void *buffer)
+{
+ struct bts_tracer *tracer;
+ int error;
+
+ /* Try to request cpu tracing while task tracing is active. */
+ tracer = ds_request_bts_task(current, buffer, BUFFER_SIZE, NULL,
+ (size_t)-1, BTS_KERNEL);
+ error = PTR_ERR(tracer);
+ if (!IS_ERR(tracer)) {
+ error = 0;
+ ds_release_bts(tracer);
+ }
+
+ if (error != -EPERM)
+ printk(KERN_CONT "task/cpu tracing overlap...");
+
+ return error ? 0 : -1;
+}
+
+int ds_selftest_bts(void)
+{
+ struct ds_selftest_bts_conf conf;
+ unsigned char buffer[BUFFER_SIZE], *small_buffer;
+ unsigned long irq;
+ int cpu;
+
+ printk(KERN_INFO "[ds] bts selftest...");
+ conf.error = 0;
+
+ small_buffer = (unsigned char *)ALIGN((unsigned long)buffer, 8) + 8;
+
+ get_online_cpus();
+ for_each_online_cpu(cpu) {
+ conf.suspend = ds_suspend_bts_wrap;
+ conf.resume = ds_resume_bts_wrap;
+ conf.tracer =
+ ds_request_bts_cpu(cpu, buffer, BUFFER_SIZE,
+ NULL, (size_t)-1, BTS_KERNEL);
+ ds_selftest_bts_cpu(&conf);
+ if (conf.error >= 0)
+ conf.error = ds_selftest_bts_bad_request_task(buffer);
+ ds_release_bts(conf.tracer);
+ if (conf.error < 0)
+ goto out;
+
+ conf.suspend = ds_suspend_bts_noirq;
+ conf.resume = ds_resume_bts_noirq;
+ conf.tracer =
+ ds_request_bts_cpu(cpu, buffer, BUFFER_SIZE,
+ NULL, (size_t)-1, BTS_KERNEL);
+ smp_call_function_single(cpu, ds_selftest_bts_cpu, &conf, 1);
+ if (conf.error >= 0) {
+ conf.error =
+ ds_selftest_bts_bad_release_noirq(cpu,
+ conf.tracer);
+ /* We must not release the tracer twice. */
+ if (conf.error < 0)
+ conf.tracer = NULL;
+ }
+ if (conf.error >= 0)
+ conf.error = ds_selftest_bts_bad_request_task(buffer);
+ smp_call_function_single(cpu, ds_release_bts_noirq_wrap,
+ conf.tracer, 1);
+ if (conf.error < 0)
+ goto out;
+ }
+
+ conf.suspend = ds_suspend_bts_wrap;
+ conf.resume = ds_resume_bts_wrap;
+ conf.tracer =
+ ds_request_bts_task(current, buffer, BUFFER_SIZE,
+ NULL, (size_t)-1, BTS_KERNEL);
+ ds_selftest_bts_cpu(&conf);
+ if (conf.error >= 0)
+ conf.error = ds_selftest_bts_bad_request_cpu(0, buffer);
+ ds_release_bts(conf.tracer);
+ if (conf.error < 0)
+ goto out;
+
+ conf.suspend = ds_suspend_bts_noirq;
+ conf.resume = ds_resume_bts_noirq;
+ conf.tracer =
+ ds_request_bts_task(current, small_buffer, SMALL_BUFFER_SIZE,
+ NULL, (size_t)-1, BTS_KERNEL);
+ local_irq_save(irq);
+ ds_selftest_bts_cpu(&conf);
+ if (conf.error >= 0)
+ conf.error = ds_selftest_bts_bad_request_cpu(0, buffer);
+ ds_release_bts_noirq(conf.tracer);
+ local_irq_restore(irq);
+ if (conf.error < 0)
+ goto out;
+
+ conf.error = 0;
+ out:
+ put_online_cpus();
+ printk(KERN_CONT "%s.\n", (conf.error ? "failed" : "passed"));
+
+ return conf.error;
+}
+
+int ds_selftest_pebs(void)
+{
+ return 0;
+}
--- /dev/null
+/*
+ * Debug Store support - selftest
+ *
+ *
+ * Copyright (C) 2009 Intel Corporation.
+ * Markus Metzger <markus.t.metzger@intel.com>, 2009
+ */
+
+#ifdef CONFIG_X86_DS_SELFTEST
+extern int ds_selftest_bts(void);
+extern int ds_selftest_pebs(void);
+#else
+static inline int ds_selftest_bts(void) { return 0; }
+static inline int ds_selftest_pebs(void) { return 0; }
+#endif
unsigned long *sp, unsigned long bp, char *log_lvl);
extern unsigned int code_bytes;
-extern int kstack_depth_to_print;
/* The form of the top of the frame on the stack */
struct stack_frame {
*/
__init void e820_setup_gap(void)
{
- unsigned long gapstart, gapsize, round;
+ unsigned long gapstart, gapsize;
int found;
gapstart = 0x10000000;
#endif
/*
- * See how much we want to round up: start off with
- * rounding to the next 1MB area.
+ * e820_reserve_resources_late protect stolen RAM already
*/
- round = 0x100000;
- while ((gapsize >> 4) > round)
- round += round;
- /* Fun with two's complement */
- pci_mem_start = (gapstart + round) & -round;
+ pci_mem_start = gapstart;
printk(KERN_INFO
"Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
}
}
+/* How much should we pad RAM ending depending on where it is? */
+static unsigned long ram_alignment(resource_size_t pos)
+{
+ unsigned long mb = pos >> 20;
+
+ /* To 64kB in the first megabyte */
+ if (!mb)
+ return 64*1024;
+
+ /* To 1MB in the first 16MB */
+ if (mb < 16)
+ return 1024*1024;
+
+ /* To 32MB for anything above that */
+ return 32*1024*1024;
+}
+
void __init e820_reserve_resources_late(void)
{
int i;
insert_resource_expand_to_fit(&iomem_resource, res);
res++;
}
+
+ /*
+ * Try to bump up RAM regions to reasonable boundaries to
+ * avoid stolen RAM:
+ */
+ for (i = 0; i < e820.nr_map; i++) {
+ struct e820entry *entry = &e820_saved.map[i];
+ resource_size_t start, end;
+
+ if (entry->type != E820_RAM)
+ continue;
+ start = entry->addr + entry->size;
+ end = round_up(start, ram_alignment(start));
+ if (start == end)
+ continue;
+ reserve_region_with_split(&iomem_resource, start,
+ end - 1, "RAM buffer");
+ }
}
char *__init default_machine_specific_memory_setup(void)
}
+#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
static u32 __init ati_ixp4x0_rev(int num, int slot, int func)
{
d &= 0xff;
return d;
}
+#endif
static void __init ati_bugs(int num, int slot, int func)
{
GLOBAL(return_to_handler)
subq $80, %rsp
+ /* Save the return values */
movq %rax, (%rsp)
- movq %rcx, 8(%rsp)
- movq %rdx, 16(%rsp)
- movq %rsi, 24(%rsp)
- movq %rdi, 32(%rsp)
- movq %r8, 40(%rsp)
- movq %r9, 48(%rsp)
- movq %r10, 56(%rsp)
- movq %r11, 64(%rsp)
+ movq %rdx, 8(%rsp)
call ftrace_return_to_handler
movq %rax, 72(%rsp)
- movq 64(%rsp), %r11
- movq 56(%rsp), %r10
- movq 48(%rsp), %r9
- movq 40(%rsp), %r8
- movq 32(%rsp), %rdi
- movq 24(%rsp), %rsi
- movq 16(%rsp), %rdx
- movq 8(%rsp), %rcx
+ movq 8(%rsp), %rdx
movq (%rsp), %rax
addq $72, %rsp
retq
apicinterrupt SPURIOUS_APIC_VECTOR \
spurious_interrupt smp_spurious_interrupt
+#ifdef CONFIG_PERF_COUNTERS
+apicinterrupt LOCAL_PENDING_VECTOR \
+ perf_pending_interrupt smp_perf_pending_interrupt
+#endif
+
/*
* Exception entry points.
*/
paranoidzeroentry_ist debug do_debug DEBUG_STACK
paranoidzeroentry_ist int3 do_int3 DEBUG_STACK
paranoiderrorentry stack_segment do_stack_segment
+#ifdef CONFIG_XEN
+zeroentry xen_debug do_debug
+zeroentry xen_int3 do_int3
+errorentry xen_stack_segment do_stack_segment
+#endif
errorentry general_protection do_general_protection
errorentry page_fault do_page_fault
#ifdef CONFIG_X86_MCE
ENTRY(initial_code)
.long i386_start_kernel
-.section .text
-/*
- * Real beginning of normal "text" segment
- */
-ENTRY(stext)
-ENTRY(_stext)
-
/*
* BSS section
*/
#include <asm/io_apic.h>
#include <asm/irq.h>
#include <asm/idle.h>
+#include <asm/hw_irq.h>
atomic_t irq_err_count;
*/
void ack_bad_irq(unsigned int irq)
{
- printk(KERN_ERR "unexpected IRQ trap at vector %02x\n", irq);
+ if (printk_ratelimit())
+ pr_err("unexpected IRQ trap at vector %02x\n", irq);
-#ifdef CONFIG_X86_LOCAL_APIC
/*
* Currently unexpected vectors happen only on SMP and APIC.
* We _must_ ack these because every local APIC has only N
* completely.
* But only ack when the APIC is enabled -AK
*/
- if (cpu_has_apic)
- ack_APIC_irq();
-#endif
+ ack_APIC_irq();
}
#define irq_stats(x) (&per_cpu(irq_stat, x))
for_each_online_cpu(j)
seq_printf(p, "%10u ", irq_stats(j)->irq_spurious_count);
seq_printf(p, " Spurious interrupts\n");
+ seq_printf(p, "%*s: ", prec, "CNT");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->apic_perf_irqs);
+ seq_printf(p, " Performance counter interrupts\n");
+ seq_printf(p, "%*s: ", prec, "PND");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->apic_pending_irqs);
+ seq_printf(p, " Performance pending work\n");
#endif
if (generic_interrupt_extension) {
seq_printf(p, "%*s: ", prec, "PLT");
#ifdef CONFIG_X86_LOCAL_APIC
sum += irq_stats(cpu)->apic_timer_irqs;
sum += irq_stats(cpu)->irq_spurious_count;
+ sum += irq_stats(cpu)->apic_perf_irqs;
+ sum += irq_stats(cpu)->apic_pending_irqs;
#endif
if (generic_interrupt_extension)
sum += irq_stats(cpu)->generic_irqs;
sum += irq_stats(cpu)->irq_thermal_count;
# ifdef CONFIG_X86_64
sum += irq_stats(cpu)->irq_threshold_count;
-#endif
+# endif
#endif
return sum;
}
irq = __get_cpu_var(vector_irq)[vector];
if (!handle_irq(irq, regs)) {
-#ifdef CONFIG_X86_64
- if (!disable_apic)
- ack_APIC_irq();
-#endif
+ ack_APIC_irq();
if (printk_ratelimit())
- printk(KERN_EMERG "%s: %d.%d No irq handler for vector (irq %d)\n",
- __func__, smp_processor_id(), vector, irq);
+ pr_emerg("%s: %d.%d No irq handler for vector (irq %d)\n",
+ __func__, smp_processor_id(), vector, irq);
}
irq_exit();
+#include <linux/linkage.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
+#include <linux/timex.h>
#include <linux/slab.h>
#include <linux/random.h>
+#include <linux/kprobes.h>
#include <linux/init.h>
#include <linux/kernel_stat.h>
#include <linux/sysdev.h>
#include <linux/bitops.h>
+#include <linux/acpi.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/timer.h>
+#include <asm/hw_irq.h>
#include <asm/pgtable.h>
#include <asm/desc.h>
#include <asm/apic.h>
#include <asm/i8259.h>
#include <asm/traps.h>
+/*
+ * ISA PIC or low IO-APIC triggered (INTA-cycle or APIC) interrupts:
+ * (these are usually mapped to vectors 0x30-0x3f)
+ */
+
+/*
+ * The IO-APIC gives us many more interrupt sources. Most of these
+ * are unused but an SMP system is supposed to have enough memory ...
+ * sometimes (mostly wrt. hw bugs) we get corrupted vectors all
+ * across the spectrum, so we really want to be prepared to get all
+ * of these. Plus, more powerful systems might have more than 64
+ * IO-APIC registers.
+ *
+ * (these are usually mapped into the 0x30-0xff vector range)
+ */
+#ifdef CONFIG_X86_32
/*
* Note that on a 486, we don't want to do a SIGFPE on an irq13
* as the irq is unreliable, and exception 16 works correctly
.handler = math_error_irq,
.name = "fpu",
};
-
-void __init init_ISA_irqs(void)
-{
- int i;
-
-#ifdef CONFIG_X86_LOCAL_APIC
- init_bsp_APIC();
#endif
- init_8259A(0);
-
- /*
- * 16 old-style INTA-cycle interrupts:
- */
- for (i = 0; i < NR_IRQS_LEGACY; i++) {
- struct irq_desc *desc = irq_to_desc(i);
-
- desc->status = IRQ_DISABLED;
- desc->action = NULL;
- desc->depth = 1;
-
- set_irq_chip_and_handler_name(i, &i8259A_chip,
- handle_level_irq, "XT");
- }
-}
/*
* IRQ2 is cascade interrupt to second interrupt controller
return 0;
}
-/* Overridden in paravirt.c */
-void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
-
-void __init native_init_IRQ(void)
+static void __init init_ISA_irqs(void)
{
int i;
- /* Execute any quirks before the call gates are initialised: */
- x86_quirk_pre_intr_init();
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
+ init_bsp_APIC();
+#endif
+ init_8259A(0);
/*
- * Cover the whole vector space, no vector can escape
- * us. (some of these will be overridden and become
- * 'special' SMP interrupts)
+ * 16 old-style INTA-cycle interrupts:
*/
- for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
- /* SYSCALL_VECTOR was reserved in trap_init. */
- if (i != SYSCALL_VECTOR)
- set_intr_gate(i, interrupt[i-FIRST_EXTERNAL_VECTOR]);
+ for (i = 0; i < NR_IRQS_LEGACY; i++) {
+ struct irq_desc *desc = irq_to_desc(i);
+
+ desc->status = IRQ_DISABLED;
+ desc->action = NULL;
+ desc->depth = 1;
+
+ set_irq_chip_and_handler_name(i, &i8259A_chip,
+ handle_level_irq, "XT");
}
+}
+/* Overridden in paravirt.c */
+void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_SMP)
+static void __init smp_intr_init(void)
+{
+#ifdef CONFIG_SMP
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
/*
* The reschedule interrupt is a CPU-to-CPU reschedule-helper
* IPI, driven by wakeup.
/* IPI for generic function call */
alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
- /* IPI for single call function */
+ /* IPI for generic single function call */
alloc_intr_gate(CALL_FUNCTION_SINGLE_VECTOR,
- call_function_single_interrupt);
+ call_function_single_interrupt);
/* Low priority IPI to cleanup after moving an irq */
set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors);
#endif
+#endif /* CONFIG_SMP */
+}
+
+static void __init apic_intr_init(void)
+{
+ smp_intr_init();
+
+#ifdef CONFIG_X86_THERMAL_VECTOR
+ alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
+#endif
+#ifdef CONFIG_X86_THRESHOLD
+ alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
+#endif
+#if defined(CONFIG_X86_NEW_MCE) && defined(CONFIG_X86_LOCAL_APIC)
+ alloc_intr_gate(MCE_SELF_VECTOR, mce_self_interrupt);
+#endif
-#ifdef CONFIG_X86_LOCAL_APIC
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
/* self generated IPI for local APIC timer */
alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
/* IPI vectors for APIC spurious and error interrupts */
alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
+
+ /* Performance monitoring interrupts: */
+# ifdef CONFIG_PERF_COUNTERS
+ alloc_intr_gate(LOCAL_PENDING_VECTOR, perf_pending_interrupt);
+# endif
+
#endif
+}
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_MCE_P4THERMAL)
- /* thermal monitor LVT interrupt */
- alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
+/**
+ * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors
+ *
+ * Description:
+ * Perform any necessary interrupt initialisation prior to setting up
+ * the "ordinary" interrupt call gates. For legacy reasons, the ISA
+ * interrupts should be initialised here if the machine emulates a PC
+ * in any way.
+ **/
+static void __init x86_quirk_pre_intr_init(void)
+{
+#ifdef CONFIG_X86_32
+ if (x86_quirks->arch_pre_intr_init) {
+ if (x86_quirks->arch_pre_intr_init())
+ return;
+ }
#endif
+ init_ISA_irqs();
+}
+
+void __init native_init_IRQ(void)
+{
+ int i;
+
+ /* Execute any quirks before the call gates are initialised: */
+ x86_quirk_pre_intr_init();
+
+ apic_intr_init();
+
+ /*
+ * Cover the whole vector space, no vector can escape
+ * us. (some of these will be overridden and become
+ * 'special' SMP interrupts)
+ */
+ for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
+ /* IA32_SYSCALL_VECTOR could be used in trap_init already. */
+ if (!test_bit(i, used_vectors))
+ set_intr_gate(i, interrupt[i-FIRST_EXTERNAL_VECTOR]);
+ }
if (!acpi_ioapic)
setup_irq(2, &irq2);
+#ifdef CONFIG_X86_32
/*
* Call quirks after call gates are initialised (usually add in
* the architecture specific gates):
setup_irq(FPU_IRQ, &fpu_irq);
irq_ctx_init(smp_processor_id());
+#endif
}
+++ /dev/null
-#include <linux/linkage.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/init.h>
-#include <linux/kernel_stat.h>
-#include <linux/sysdev.h>
-#include <linux/bitops.h>
-#include <linux/acpi.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <asm/hw_irq.h>
-#include <asm/pgtable.h>
-#include <asm/desc.h>
-#include <asm/apic.h>
-#include <asm/i8259.h>
-
-/*
- * ISA PIC or low IO-APIC triggered (INTA-cycle or APIC) interrupts:
- * (these are usually mapped to vectors 0x30-0x3f)
- */
-
-/*
- * The IO-APIC gives us many more interrupt sources. Most of these
- * are unused but an SMP system is supposed to have enough memory ...
- * sometimes (mostly wrt. hw bugs) we get corrupted vectors all
- * across the spectrum, so we really want to be prepared to get all
- * of these. Plus, more powerful systems might have more than 64
- * IO-APIC registers.
- *
- * (these are usually mapped into the 0x30-0xff vector range)
- */
-
-/*
- * IRQ2 is cascade interrupt to second interrupt controller
- */
-
-static struct irqaction irq2 = {
- .handler = no_action,
- .name = "cascade",
-};
-DEFINE_PER_CPU(vector_irq_t, vector_irq) = {
- [0 ... IRQ0_VECTOR - 1] = -1,
- [IRQ0_VECTOR] = 0,
- [IRQ1_VECTOR] = 1,
- [IRQ2_VECTOR] = 2,
- [IRQ3_VECTOR] = 3,
- [IRQ4_VECTOR] = 4,
- [IRQ5_VECTOR] = 5,
- [IRQ6_VECTOR] = 6,
- [IRQ7_VECTOR] = 7,
- [IRQ8_VECTOR] = 8,
- [IRQ9_VECTOR] = 9,
- [IRQ10_VECTOR] = 10,
- [IRQ11_VECTOR] = 11,
- [IRQ12_VECTOR] = 12,
- [IRQ13_VECTOR] = 13,
- [IRQ14_VECTOR] = 14,
- [IRQ15_VECTOR] = 15,
- [IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
-};
-
-int vector_used_by_percpu_irq(unsigned int vector)
-{
- int cpu;
-
- for_each_online_cpu(cpu) {
- if (per_cpu(vector_irq, cpu)[vector] != -1)
- return 1;
- }
-
- return 0;
-}
-
-static void __init init_ISA_irqs(void)
-{
- int i;
-
- init_bsp_APIC();
- init_8259A(0);
-
- for (i = 0; i < NR_IRQS_LEGACY; i++) {
- struct irq_desc *desc = irq_to_desc(i);
-
- desc->status = IRQ_DISABLED;
- desc->action = NULL;
- desc->depth = 1;
-
- /*
- * 16 old-style INTA-cycle interrupts:
- */
- set_irq_chip_and_handler_name(i, &i8259A_chip,
- handle_level_irq, "XT");
- }
-}
-
-void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
-
-static void __init smp_intr_init(void)
-{
-#ifdef CONFIG_SMP
- /*
- * The reschedule interrupt is a CPU-to-CPU reschedule-helper
- * IPI, driven by wakeup.
- */
- alloc_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt);
-
- /* IPIs for invalidation */
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+0, invalidate_interrupt0);
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+1, invalidate_interrupt1);
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+2, invalidate_interrupt2);
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+3, invalidate_interrupt3);
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+4, invalidate_interrupt4);
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+5, invalidate_interrupt5);
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+6, invalidate_interrupt6);
- alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+7, invalidate_interrupt7);
-
- /* IPI for generic function call */
- alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
-
- /* IPI for generic single function call */
- alloc_intr_gate(CALL_FUNCTION_SINGLE_VECTOR,
- call_function_single_interrupt);
-
- /* Low priority IPI to cleanup after moving an irq */
- set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
- set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors);
-#endif
-}
-
-static void __init apic_intr_init(void)
-{
- smp_intr_init();
-
- alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
- alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
-
- /* self generated IPI for local APIC timer */
- alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
-
- /* generic IPI for platform specific use */
- alloc_intr_gate(GENERIC_INTERRUPT_VECTOR, generic_interrupt);
-
- /* IPI vectors for APIC spurious and error interrupts */
- alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
- alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
-}
-
-void __init native_init_IRQ(void)
-{
- int i;
-
- init_ISA_irqs();
- /*
- * Cover the whole vector space, no vector can escape
- * us. (some of these will be overridden and become
- * 'special' SMP interrupts)
- */
- for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
- int vector = FIRST_EXTERNAL_VECTOR + i;
- if (vector != IA32_SYSCALL_VECTOR)
- set_intr_gate(vector, interrupt[i]);
- }
-
- apic_intr_init();
-
- if (!acpi_ioapic)
- setup_irq(2, &irq2);
-}
gdb_regs32[GDB_PS] = *(unsigned long *)(p->thread.sp + 8);
gdb_regs32[GDB_CS] = __KERNEL_CS;
gdb_regs32[GDB_SS] = __KERNEL_DS;
- gdb_regs[GDB_PC] = p->thread.ip;
+ gdb_regs[GDB_PC] = 0;
gdb_regs[GDB_R8] = 0;
gdb_regs[GDB_R9] = 0;
gdb_regs[GDB_R10] = 0;
struct kvm_para_state *state = kvm_para_state();
mmu_queue_flush(state);
- paravirt_leave_lazy(paravirt_get_lazy_mode());
+ paravirt_leave_lazy_mmu();
state->mode = paravirt_get_lazy_mode();
}
* Licensed under the terms of the GNU General Public
* License version 2. See file COPYING for details.
*/
-#include <linux/platform_device.h>
-#include <linux/capability.h>
-#include <linux/miscdevice.h>
#include <linux/firmware.h>
-#include <linux/spinlock.h>
-#include <linux/cpumask.h>
#include <linux/pci_ids.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/cpu.h>
#include <linux/pci.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
#include <asm/microcode.h>
#include <asm/processor.h>
#define UCODE_CONTAINER_SECTION_HDR 8
#define UCODE_CONTAINER_HEADER_SIZE 12
-/* serialize access to the physical write */
-static DEFINE_SPINLOCK(microcode_update_lock);
-
static struct equiv_cpu_entry *equiv_cpu_table;
static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
return 1;
}
-static void apply_microcode_amd(int cpu)
+static int apply_microcode_amd(int cpu)
{
- unsigned long flags;
u32 rev, dummy;
int cpu_num = raw_smp_processor_id();
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
BUG_ON(cpu_num != cpu);
if (mc_amd == NULL)
- return;
+ return 0;
- spin_lock_irqsave(µcode_update_lock, flags);
wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
/* get patch id after patching */
rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
- spin_unlock_irqrestore(µcode_update_lock, flags);
/* check current patch id and patch's id for match */
if (rev != mc_amd->hdr.patch_id) {
printk(KERN_ERR "microcode: CPU%d: update failed "
"(for patch_level=0x%x)\n", cpu, mc_amd->hdr.patch_id);
- return;
+ return -1;
}
printk(KERN_INFO "microcode: CPU%d: updated (new patch_level=0x%x)\n",
cpu, rev);
uci->cpu_sig.rev = rev;
+
+ return 0;
}
static int get_ucode_data(void *to, const u8 *from, size_t n)
static void free_equiv_cpu_table(void)
{
- if (equiv_cpu_table) {
- vfree(equiv_cpu_table);
- equiv_cpu_table = NULL;
- }
+ vfree(equiv_cpu_table);
+ equiv_cpu_table = NULL;
}
-static int generic_load_microcode(int cpu, const u8 *data, size_t size)
+static enum ucode_state
+generic_load_microcode(int cpu, const u8 *data, size_t size)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
const u8 *ucode_ptr = data;
int new_rev = uci->cpu_sig.rev;
unsigned int leftover;
unsigned long offset;
+ enum ucode_state state = UCODE_OK;
offset = install_equiv_cpu_table(ucode_ptr);
if (!offset) {
printk(KERN_ERR "microcode: failed to create "
"equivalent cpu table\n");
- return -EINVAL;
+ return UCODE_ERROR;
}
ucode_ptr += offset;
mc_header = (struct microcode_header_amd *)mc;
if (get_matching_microcode(cpu, mc, new_rev)) {
- if (new_mc)
- vfree(new_mc);
+ vfree(new_mc);
new_rev = mc_header->patch_id;
new_mc = mc;
} else
if (new_mc) {
if (!leftover) {
- if (uci->mc)
- vfree(uci->mc);
+ vfree(uci->mc);
uci->mc = new_mc;
pr_debug("microcode: CPU%d found a matching microcode "
"update with version 0x%x (current=0x%x)\n",
cpu, new_rev, uci->cpu_sig.rev);
- } else
+ } else {
vfree(new_mc);
- }
+ state = UCODE_ERROR;
+ }
+ } else
+ state = UCODE_NFOUND;
free_equiv_cpu_table();
- return (int)leftover;
+ return state;
}
-static int request_microcode_fw(int cpu, struct device *device)
+static enum ucode_state request_microcode_fw(int cpu, struct device *device)
{
const char *fw_name = "amd-ucode/microcode_amd.bin";
const struct firmware *firmware;
- int ret;
-
- /* We should bind the task to the CPU */
- BUG_ON(cpu != raw_smp_processor_id());
+ enum ucode_state ret;
- ret = request_firmware(&firmware, fw_name, device);
- if (ret) {
+ if (request_firmware(&firmware, fw_name, device)) {
printk(KERN_ERR "microcode: failed to load file %s\n", fw_name);
- return ret;
+ return UCODE_NFOUND;
}
ret = generic_load_microcode(cpu, firmware->data, firmware->size);
return ret;
}
-static int request_microcode_user(int cpu, const void __user *buf, size_t size)
+static enum ucode_state
+request_microcode_user(int cpu, const void __user *buf, size_t size)
{
printk(KERN_INFO "microcode: AMD microcode update via "
"/dev/cpu/microcode not supported\n");
- return -1;
+ return UCODE_ERROR;
}
static void microcode_fini_cpu_amd(int cpu)
* Thanks to Stuart Swales for pointing out this bug.
*/
#include <linux/platform_device.h>
-#include <linux/capability.h>
#include <linux/miscdevice.h>
-#include <linux/firmware.h>
+#include <linux/capability.h>
#include <linux/smp_lock.h>
-#include <linux/spinlock.h>
-#include <linux/cpumask.h>
-#include <linux/uaccess.h>
-#include <linux/vmalloc.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/slab.h>
#include <linux/cpu.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <asm/microcode.h>
#include <asm/processor.h>
-#include <asm/msr.h>
MODULE_DESCRIPTION("Microcode Update Driver");
MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
static struct microcode_ops *microcode_ops;
-/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
+/*
+ * Synchronization.
+ *
+ * All non cpu-hotplug-callback call sites use:
+ *
+ * - microcode_mutex to synchronize with each other;
+ * - get/put_online_cpus() to synchronize with
+ * the cpu-hotplug-callback call sites.
+ *
+ * We guarantee that only a single cpu is being
+ * updated at any particular moment of time.
+ */
static DEFINE_MUTEX(microcode_mutex);
struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
EXPORT_SYMBOL_GPL(ucode_cpu_info);
+/*
+ * Operations that are run on a target cpu:
+ */
+
+struct cpu_info_ctx {
+ struct cpu_signature *cpu_sig;
+ int err;
+};
+
+static void collect_cpu_info_local(void *arg)
+{
+ struct cpu_info_ctx *ctx = arg;
+
+ ctx->err = microcode_ops->collect_cpu_info(smp_processor_id(),
+ ctx->cpu_sig);
+}
+
+static int collect_cpu_info_on_target(int cpu, struct cpu_signature *cpu_sig)
+{
+ struct cpu_info_ctx ctx = { .cpu_sig = cpu_sig, .err = 0 };
+ int ret;
+
+ ret = smp_call_function_single(cpu, collect_cpu_info_local, &ctx, 1);
+ if (!ret)
+ ret = ctx.err;
+
+ return ret;
+}
+
+static int collect_cpu_info(int cpu)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ int ret;
+
+ memset(uci, 0, sizeof(*uci));
+
+ ret = collect_cpu_info_on_target(cpu, &uci->cpu_sig);
+ if (!ret)
+ uci->valid = 1;
+
+ return ret;
+}
+
+struct apply_microcode_ctx {
+ int err;
+};
+
+static void apply_microcode_local(void *arg)
+{
+ struct apply_microcode_ctx *ctx = arg;
+
+ ctx->err = microcode_ops->apply_microcode(smp_processor_id());
+}
+
+static int apply_microcode_on_target(int cpu)
+{
+ struct apply_microcode_ctx ctx = { .err = 0 };
+ int ret;
+
+ ret = smp_call_function_single(cpu, apply_microcode_local, &ctx, 1);
+ if (!ret)
+ ret = ctx.err;
+
+ return ret;
+}
+
#ifdef CONFIG_MICROCODE_OLD_INTERFACE
static int do_microcode_update(const void __user *buf, size_t size)
{
- cpumask_t old;
int error = 0;
int cpu;
- old = current->cpus_allowed;
-
for_each_online_cpu(cpu) {
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ enum ucode_state ustate;
if (!uci->valid)
continue;
- set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
- error = microcode_ops->request_microcode_user(cpu, buf, size);
- if (error < 0)
- goto out;
- if (!error)
- microcode_ops->apply_microcode(cpu);
+ ustate = microcode_ops->request_microcode_user(cpu, buf, size);
+ if (ustate == UCODE_ERROR) {
+ error = -1;
+ break;
+ } else if (ustate == UCODE_OK)
+ apply_microcode_on_target(cpu);
}
-out:
- set_cpus_allowed_ptr(current, &old);
+
return error;
}
static ssize_t microcode_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos)
{
- ssize_t ret;
+ ssize_t ret = -EINVAL;
if ((len >> PAGE_SHIFT) > num_physpages) {
- printk(KERN_ERR "microcode: too much data (max %ld pages)\n",
- num_physpages);
- return -EINVAL;
+ pr_err("microcode: too much data (max %ld pages)\n", num_physpages);
+ return ret;
}
get_online_cpus();
mutex_lock(µcode_mutex);
- ret = do_microcode_update(buf, len);
- if (!ret)
+ if (do_microcode_update(buf, len) == 0)
ret = (ssize_t)len;
mutex_unlock(µcode_mutex);
}
static const struct file_operations microcode_fops = {
- .owner = THIS_MODULE,
- .write = microcode_write,
- .open = microcode_open,
+ .owner = THIS_MODULE,
+ .write = microcode_write,
+ .open = microcode_open,
};
static struct miscdevice microcode_dev = {
- .minor = MICROCODE_MINOR,
- .name = "microcode",
- .fops = µcode_fops,
+ .minor = MICROCODE_MINOR,
+ .name = "microcode",
+ .fops = µcode_fops,
};
static int __init microcode_dev_init(void)
error = misc_register(µcode_dev);
if (error) {
- printk(KERN_ERR
- "microcode: can't misc_register on minor=%d\n",
- MICROCODE_MINOR);
+ pr_err("microcode: can't misc_register on minor=%d\n", MICROCODE_MINOR);
return error;
}
/* fake device for request_firmware */
static struct platform_device *microcode_pdev;
-static long reload_for_cpu(void *unused)
+static int reload_for_cpu(int cpu)
{
- struct ucode_cpu_info *uci = ucode_cpu_info + smp_processor_id();
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
int err = 0;
mutex_lock(µcode_mutex);
if (uci->valid) {
- err = microcode_ops->request_microcode_fw(smp_processor_id(),
- µcode_pdev->dev);
- if (!err)
- microcode_ops->apply_microcode(smp_processor_id());
+ enum ucode_state ustate;
+
+ ustate = microcode_ops->request_microcode_fw(cpu, µcode_pdev->dev);
+ if (ustate == UCODE_OK)
+ apply_microcode_on_target(cpu);
+ else
+ if (ustate == UCODE_ERROR)
+ err = -EINVAL;
}
mutex_unlock(µcode_mutex);
+
return err;
}
static ssize_t reload_store(struct sys_device *dev,
struct sysdev_attribute *attr,
- const char *buf, size_t sz)
+ const char *buf, size_t size)
{
- char *end;
- unsigned long val = simple_strtoul(buf, &end, 0);
- int err = 0;
+ unsigned long val;
int cpu = dev->id;
+ int ret = 0;
+ char *end;
+ val = simple_strtoul(buf, &end, 0);
if (end == buf)
return -EINVAL;
+
if (val == 1) {
get_online_cpus();
if (cpu_online(cpu))
- err = work_on_cpu(cpu, reload_for_cpu, NULL);
+ ret = reload_for_cpu(cpu);
put_online_cpus();
}
- if (err)
- return err;
- return sz;
+
+ if (!ret)
+ ret = size;
+
+ return ret;
}
static ssize_t version_show(struct sys_device *dev,
};
static struct attribute_group mc_attr_group = {
- .attrs = mc_default_attrs,
- .name = "microcode",
+ .attrs = mc_default_attrs,
+ .name = "microcode",
};
-static void __microcode_fini_cpu(int cpu)
+static void microcode_fini_cpu(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
uci->valid = 0;
}
-static void microcode_fini_cpu(int cpu)
-{
- mutex_lock(µcode_mutex);
- __microcode_fini_cpu(cpu);
- mutex_unlock(µcode_mutex);
-}
-
-static void collect_cpu_info(int cpu)
+static enum ucode_state microcode_resume_cpu(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- memset(uci, 0, sizeof(*uci));
- if (!microcode_ops->collect_cpu_info(cpu, &uci->cpu_sig))
- uci->valid = 1;
+ if (!uci->mc)
+ return UCODE_NFOUND;
+
+ pr_debug("microcode: CPU%d updated upon resume\n", cpu);
+ apply_microcode_on_target(cpu);
+
+ return UCODE_OK;
}
-static int microcode_resume_cpu(int cpu)
+static enum ucode_state microcode_init_cpu(int cpu)
{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- struct cpu_signature nsig;
+ enum ucode_state ustate;
- pr_debug("microcode: CPU%d resumed\n", cpu);
+ if (collect_cpu_info(cpu))
+ return UCODE_ERROR;
- if (!uci->mc)
- return 1;
+ /* --dimm. Trigger a delayed update? */
+ if (system_state != SYSTEM_RUNNING)
+ return UCODE_NFOUND;
- /*
- * Let's verify that the 'cached' ucode does belong
- * to this cpu (a bit of paranoia):
- */
- if (microcode_ops->collect_cpu_info(cpu, &nsig)) {
- __microcode_fini_cpu(cpu);
- printk(KERN_ERR "failed to collect_cpu_info for resuming cpu #%d\n",
- cpu);
- return -1;
- }
+ ustate = microcode_ops->request_microcode_fw(cpu, µcode_pdev->dev);
- if ((nsig.sig != uci->cpu_sig.sig) || (nsig.pf != uci->cpu_sig.pf)) {
- __microcode_fini_cpu(cpu);
- printk(KERN_ERR "cached ucode doesn't match the resuming cpu #%d\n",
- cpu);
- /* Should we look for a new ucode here? */
- return 1;
+ if (ustate == UCODE_OK) {
+ pr_debug("microcode: CPU%d updated upon init\n", cpu);
+ apply_microcode_on_target(cpu);
}
- return 0;
+ return ustate;
}
-static long microcode_update_cpu(void *unused)
+static enum ucode_state microcode_update_cpu(int cpu)
{
- struct ucode_cpu_info *uci = ucode_cpu_info + smp_processor_id();
- int err = 0;
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ enum ucode_state ustate;
- /*
- * Check if the system resume is in progress (uci->valid != NULL),
- * otherwise just request a firmware:
- */
- if (uci->valid) {
- err = microcode_resume_cpu(smp_processor_id());
- } else {
- collect_cpu_info(smp_processor_id());
- if (uci->valid && system_state == SYSTEM_RUNNING)
- err = microcode_ops->request_microcode_fw(
- smp_processor_id(),
- µcode_pdev->dev);
- }
- if (!err)
- microcode_ops->apply_microcode(smp_processor_id());
- return err;
-}
+ if (uci->valid)
+ ustate = microcode_resume_cpu(cpu);
+ else
+ ustate = microcode_init_cpu(cpu);
-static int microcode_init_cpu(int cpu)
-{
- int err;
- mutex_lock(µcode_mutex);
- err = work_on_cpu(cpu, microcode_update_cpu, NULL);
- mutex_unlock(µcode_mutex);
-
- return err;
+ return ustate;
}
static int mc_sysdev_add(struct sys_device *sys_dev)
{
int err, cpu = sys_dev->id;
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
if (!cpu_online(cpu))
return 0;
pr_debug("microcode: CPU%d added\n", cpu);
- memset(uci, 0, sizeof(*uci));
err = sysfs_create_group(&sys_dev->kobj, &mc_attr_group);
if (err)
return err;
- err = microcode_init_cpu(cpu);
+ if (microcode_init_cpu(cpu) == UCODE_ERROR)
+ err = -EINVAL;
return err;
}
static int mc_sysdev_resume(struct sys_device *dev)
{
int cpu = dev->id;
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
if (!cpu_online(cpu))
return 0;
- /* only CPU 0 will apply ucode here */
- microcode_update_cpu(NULL);
+ /*
+ * All non-bootup cpus are still disabled,
+ * so only CPU 0 will apply ucode here.
+ *
+ * Moreover, there can be no concurrent
+ * updates from any other places at this point.
+ */
+ WARN_ON(cpu != 0);
+
+ if (uci->valid && uci->mc)
+ microcode_ops->apply_microcode(cpu);
+
return 0;
}
static struct sysdev_driver mc_sysdev_driver = {
- .add = mc_sysdev_add,
- .remove = mc_sysdev_remove,
- .resume = mc_sysdev_resume,
+ .add = mc_sysdev_add,
+ .remove = mc_sysdev_remove,
+ .resume = mc_sysdev_resume,
};
static __cpuinit int
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
- if (microcode_init_cpu(cpu))
- printk(KERN_ERR "microcode: failed to init CPU%d\n",
- cpu);
+ microcode_update_cpu(cpu);
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
pr_debug("microcode: CPU%d added\n", cpu);
if (sysfs_create_group(&sys_dev->kobj, &mc_attr_group))
- printk(KERN_ERR "microcode: Failed to create the sysfs "
- "group for CPU%d\n", cpu);
+ pr_err("microcode: Failed to create group for CPU%d\n", cpu);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
microcode_ops = init_amd_microcode();
if (!microcode_ops) {
- printk(KERN_ERR "microcode: no support for this CPU vendor\n");
+ pr_err("microcode: no support for this CPU vendor\n");
return -ENODEV;
}
- error = microcode_dev_init();
- if (error)
- return error;
microcode_pdev = platform_device_register_simple("microcode", -1,
NULL, 0);
if (IS_ERR(microcode_pdev)) {
}
get_online_cpus();
+ mutex_lock(µcode_mutex);
+
error = sysdev_driver_register(&cpu_sysdev_class, &mc_sysdev_driver);
+
+ mutex_unlock(µcode_mutex);
put_online_cpus();
+
if (error) {
- microcode_dev_exit();
platform_device_unregister(microcode_pdev);
return error;
}
+ error = microcode_dev_init();
+ if (error)
+ return error;
+
register_hotcpu_notifier(&mc_cpu_notifier);
- printk(KERN_INFO
- "Microcode Update Driver: v" MICROCODE_VERSION
+ pr_info("Microcode Update Driver: v" MICROCODE_VERSION
" <tigran@aivazian.fsnet.co.uk>,"
" Peter Oruba\n");
return 0;
}
+module_init(microcode_init);
static void __exit microcode_exit(void)
{
unregister_hotcpu_notifier(&mc_cpu_notifier);
get_online_cpus();
+ mutex_lock(µcode_mutex);
+
sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
+
+ mutex_unlock(µcode_mutex);
put_online_cpus();
platform_device_unregister(microcode_pdev);
microcode_ops = NULL;
- printk(KERN_INFO
- "Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
+ pr_info("Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
}
-
-module_init(microcode_init);
module_exit(microcode_exit);
* Fix sigmatch() macro to handle old CPUs with pf == 0.
* Thanks to Stuart Swales for pointing out this bug.
*/
-#include <linux/platform_device.h>
-#include <linux/capability.h>
-#include <linux/miscdevice.h>
#include <linux/firmware.h>
-#include <linux/smp_lock.h>
-#include <linux/spinlock.h>
-#include <linux/cpumask.h>
#include <linux/uaccess.h>
-#include <linux/vmalloc.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/cpu.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
+#include <linux/vmalloc.h>
#include <asm/microcode.h>
#include <asm/processor.h>
#define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
-/* serialize access to the physical write to MSR 0x79 */
-static DEFINE_SPINLOCK(microcode_update_lock);
-
static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
{
struct cpuinfo_x86 *c = &cpu_data(cpu_num);
- unsigned long flags;
unsigned int val[2];
memset(csig, 0, sizeof(*csig));
csig->pf = 1 << ((val[1] >> 18) & 7);
}
- /* serialize access to the physical write to MSR 0x79 */
- spin_lock_irqsave(µcode_update_lock, flags);
-
wrmsr(MSR_IA32_UCODE_REV, 0, 0);
/* see notes above for revision 1.07. Apparent chip bug */
sync_core();
/* get the current revision from MSR 0x8B */
rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev);
- spin_unlock_irqrestore(µcode_update_lock, flags);
- pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n",
- csig->sig, csig->pf, csig->rev);
+ printk(KERN_INFO "microcode: CPU%d sig=0x%x, pf=0x%x, revision=0x%x\n",
+ cpu_num, csig->sig, csig->pf, csig->rev);
return 0;
}
return 0;
}
-static void apply_microcode(int cpu)
+static int apply_microcode(int cpu)
{
struct microcode_intel *mc_intel;
struct ucode_cpu_info *uci;
- unsigned long flags;
unsigned int val[2];
int cpu_num;
BUG_ON(cpu_num != cpu);
if (mc_intel == NULL)
- return;
-
- /* serialize access to the physical write to MSR 0x79 */
- spin_lock_irqsave(µcode_update_lock, flags);
+ return 0;
/* write microcode via MSR 0x79 */
wrmsr(MSR_IA32_UCODE_WRITE,
/* get the current revision from MSR 0x8B */
rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
- spin_unlock_irqrestore(µcode_update_lock, flags);
if (val[1] != mc_intel->hdr.rev) {
- printk(KERN_ERR "microcode: CPU%d update from revision "
- "0x%x to 0x%x failed\n",
- cpu_num, uci->cpu_sig.rev, val[1]);
- return;
+ printk(KERN_ERR "microcode: CPU%d update "
+ "to revision 0x%x failed\n",
+ cpu_num, mc_intel->hdr.rev);
+ return -1;
}
- printk(KERN_INFO "microcode: CPU%d updated from revision "
- "0x%x to 0x%x, date = %04x-%02x-%02x \n",
- cpu_num, uci->cpu_sig.rev, val[1],
+ printk(KERN_INFO "microcode: CPU%d updated to revision "
+ "0x%x, date = %04x-%02x-%02x \n",
+ cpu_num, val[1],
mc_intel->hdr.date & 0xffff,
mc_intel->hdr.date >> 24,
(mc_intel->hdr.date >> 16) & 0xff);
uci->cpu_sig.rev = val[1];
+
+ return 0;
}
-static int generic_load_microcode(int cpu, void *data, size_t size,
- int (*get_ucode_data)(void *, const void *, size_t))
+static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
+ int (*get_ucode_data)(void *, const void *, size_t))
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
u8 *ucode_ptr = data, *new_mc = NULL, *mc;
int new_rev = uci->cpu_sig.rev;
unsigned int leftover = size;
+ enum ucode_state state = UCODE_OK;
while (leftover) {
struct microcode_header_intel mc_header;
leftover -= mc_size;
}
- if (!new_mc)
+ if (leftover) {
+ if (new_mc)
+ vfree(new_mc);
+ state = UCODE_ERROR;
goto out;
+ }
- if (leftover) {
- vfree(new_mc);
+ if (!new_mc) {
+ state = UCODE_NFOUND;
goto out;
}
pr_debug("microcode: CPU%d found a matching microcode update with"
" version 0x%x (current=0x%x)\n",
cpu, new_rev, uci->cpu_sig.rev);
-
- out:
- return (int)leftover;
+out:
+ return state;
}
static int get_ucode_fw(void *to, const void *from, size_t n)
return 0;
}
-static int request_microcode_fw(int cpu, struct device *device)
+static enum ucode_state request_microcode_fw(int cpu, struct device *device)
{
char name[30];
struct cpuinfo_x86 *c = &cpu_data(cpu);
const struct firmware *firmware;
- int ret;
+ enum ucode_state ret;
- /* We should bind the task to the CPU */
- BUG_ON(cpu != raw_smp_processor_id());
sprintf(name, "intel-ucode/%02x-%02x-%02x",
c->x86, c->x86_model, c->x86_mask);
- ret = request_firmware(&firmware, name, device);
- if (ret) {
+
+ if (request_firmware(&firmware, name, device)) {
pr_debug("microcode: data file %s load failed\n", name);
- return ret;
+ return UCODE_NFOUND;
}
ret = generic_load_microcode(cpu, (void *)firmware->data,
return copy_from_user(to, from, n);
}
-static int request_microcode_user(int cpu, const void __user *buf, size_t size)
+static enum ucode_state
+request_microcode_user(int cpu, const void __user *buf, size_t size)
{
- /* We should bind the task to the CPU */
- BUG_ON(cpu != raw_smp_processor_id());
-
return generic_load_microcode(cpu, (void *)buf, size, &get_ucode_user);
}
#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/smp.h>
+#include <linux/pci.h>
#include <asm/mtrr.h>
#include <asm/mpspec.h>
inline void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) {}
#endif /* CONFIG_X86_IO_APIC */
-static int check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length,
- int count)
+static int
+check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length, int count)
{
- if (!mpc_new_phys) {
- pr_info("No spare slots, try to append...take your risk, "
- "new mpc_length %x\n", count);
- } else {
- if (count <= mpc_new_length)
- pr_info("No spare slots, try to append..., "
- "new mpc_length %x\n", count);
- else {
- pr_err("mpc_new_length %lx is too small\n",
- mpc_new_length);
- return -1;
- }
+ int ret = 0;
+
+ if (!mpc_new_phys || count <= mpc_new_length) {
+ WARN(1, "update_mptable: No spare slots (length: %x)\n", count);
+ return -1;
}
- return 0;
+ return ret;
}
static int __init replace_intsrc_all(struct mpc_table *mpc,
} else {
struct mpc_intsrc *m = (struct mpc_intsrc *)mpt;
count += sizeof(struct mpc_intsrc);
- if (!check_slot(mpc_new_phys, mpc_new_length, count))
+ if (check_slot(mpc_new_phys, mpc_new_length, count) < 0)
goto out;
assign_to_mpc_intsrc(&mp_irqs[i], m);
mpc->length = count;
return 0;
}
-static int __initdata enable_update_mptable;
+int enable_update_mptable;
static int __init update_mptable_setup(char *str)
{
enable_update_mptable = 1;
+#ifdef CONFIG_PCI
+ pci_routeirq = 1;
+#endif
return 0;
}
early_param("update_mptable", update_mptable_setup);
static int __init parse_alloc_mptable_opt(char *p)
{
enable_update_mptable = 1;
+#ifdef CONFIG_PCI
+ pci_routeirq = 1;
+#endif
alloc_mptable = 1;
if (!p)
return 0;
static inline void enter_lazy(enum paravirt_lazy_mode mode)
{
- BUG_ON(__get_cpu_var(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);
- BUG_ON(preemptible());
+ BUG_ON(percpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);
- __get_cpu_var(paravirt_lazy_mode) = mode;
+ percpu_write(paravirt_lazy_mode, mode);
}
-void paravirt_leave_lazy(enum paravirt_lazy_mode mode)
+static void leave_lazy(enum paravirt_lazy_mode mode)
{
- BUG_ON(__get_cpu_var(paravirt_lazy_mode) != mode);
- BUG_ON(preemptible());
+ BUG_ON(percpu_read(paravirt_lazy_mode) != mode);
- __get_cpu_var(paravirt_lazy_mode) = PARAVIRT_LAZY_NONE;
+ percpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE);
}
void paravirt_enter_lazy_mmu(void)
void paravirt_leave_lazy_mmu(void)
{
- paravirt_leave_lazy(PARAVIRT_LAZY_MMU);
+ leave_lazy(PARAVIRT_LAZY_MMU);
}
-void paravirt_enter_lazy_cpu(void)
+void paravirt_start_context_switch(struct task_struct *prev)
{
+ BUG_ON(preemptible());
+
+ if (percpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) {
+ arch_leave_lazy_mmu_mode();
+ set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES);
+ }
enter_lazy(PARAVIRT_LAZY_CPU);
}
-void paravirt_leave_lazy_cpu(void)
+void paravirt_end_context_switch(struct task_struct *next)
{
- paravirt_leave_lazy(PARAVIRT_LAZY_CPU);
+ BUG_ON(preemptible());
+
+ leave_lazy(PARAVIRT_LAZY_CPU);
+
+ if (test_and_clear_ti_thread_flag(task_thread_info(next), TIF_LAZY_MMU_UPDATES))
+ arch_enter_lazy_mmu_mode();
}
enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
{
- return __get_cpu_var(paravirt_lazy_mode);
+ if (in_interrupt())
+ return PARAVIRT_LAZY_NONE;
+
+ return percpu_read(paravirt_lazy_mode);
}
void arch_flush_lazy_mmu_mode(void)
preempt_disable();
if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {
- WARN_ON(preempt_count() == 1);
arch_leave_lazy_mmu_mode();
arch_enter_lazy_mmu_mode();
}
preempt_enable();
}
-void arch_flush_lazy_cpu_mode(void)
-{
- preempt_disable();
-
- if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU) {
- WARN_ON(preempt_count() == 1);
- arch_leave_lazy_cpu_mode();
- arch_enter_lazy_cpu_mode();
- }
-
- preempt_enable();
-}
-
struct pv_info pv_info = {
.name = "bare hardware",
.paravirt_enabled = 0,
.set_iopl_mask = native_set_iopl_mask,
.io_delay = native_io_delay,
- .lazy_mode = {
- .enter = paravirt_nop,
- .leave = paravirt_nop,
- },
+ .start_context_switch = paravirt_nop,
+ .end_context_switch = paravirt_nop,
};
struct pv_apic_ops pv_apic_ops = {
static struct calgary_bus_info bus_info[MAX_PHB_BUS_NUM] = { { NULL, 0, 0 }, };
-/* enable this to stress test the chip's TCE cache */
-#ifdef CONFIG_IOMMU_DEBUG
-static int debugging = 1;
-
-static inline unsigned long verify_bit_range(unsigned long* bitmap,
- int expected, unsigned long start, unsigned long end)
-{
- unsigned long idx = start;
-
- BUG_ON(start >= end);
-
- while (idx < end) {
- if (!!test_bit(idx, bitmap) != expected)
- return idx;
- ++idx;
- }
-
- /* all bits have the expected value */
- return ~0UL;
-}
-#else /* debugging is disabled */
-static int debugging;
-
-static inline unsigned long verify_bit_range(unsigned long* bitmap,
- int expected, unsigned long start, unsigned long end)
-{
- return ~0UL;
-}
-
-#endif /* CONFIG_IOMMU_DEBUG */
-
static inline int translation_enabled(struct iommu_table *tbl)
{
/* only PHBs with translation enabled have an IOMMU table */
{
unsigned long index;
unsigned long end;
- unsigned long badbit;
unsigned long flags;
index = start_addr >> PAGE_SHIFT;
spin_lock_irqsave(&tbl->it_lock, flags);
- badbit = verify_bit_range(tbl->it_map, 0, index, end);
- if (badbit != ~0UL) {
- if (printk_ratelimit())
- printk(KERN_ERR "Calgary: entry already allocated at "
- "0x%lx tbl %p dma 0x%lx npages %u\n",
- badbit, tbl, start_addr, npages);
- }
-
iommu_area_reserve(tbl->it_map, index, npages);
spin_unlock_irqrestore(&tbl->it_lock, flags);
unsigned int npages)
{
unsigned long entry;
- unsigned long badbit;
unsigned long badend;
unsigned long flags;
spin_lock_irqsave(&tbl->it_lock, flags);
- badbit = verify_bit_range(tbl->it_map, 1, entry, entry + npages);
- if (badbit != ~0UL) {
- if (printk_ratelimit())
- printk(KERN_ERR "Calgary: bit is off at 0x%lx "
- "tbl %p dma 0x%Lx entry 0x%lx npages %u\n",
- badbit, tbl, dma_addr, entry, npages);
- }
-
iommu_area_free(tbl->it_map, entry, npages);
spin_unlock_irqrestore(&tbl->it_lock, flags);
iommu_detected = 1;
calgary_detected = 1;
printk(KERN_INFO "PCI-DMA: Calgary IOMMU detected.\n");
- printk(KERN_INFO "PCI-DMA: Calgary TCE table spec is %d, "
- "CONFIG_IOMMU_DEBUG is %s.\n", specified_table_size,
- debugging ? "enabled" : "disabled");
+ printk(KERN_INFO "PCI-DMA: Calgary TCE table spec is %d\n",
+ specified_table_size);
/* swiotlb for devices that aren't behind the Calgary. */
if (max_pfn > MAX_DMA32_PFN)
}
#ifdef CONFIG_IOMMU_LEAK
-
-#define SET_LEAK(x) \
- do { \
- if (iommu_leak_tab) \
- iommu_leak_tab[x] = __builtin_return_address(0);\
- } while (0)
-
-#define CLEAR_LEAK(x) \
- do { \
- if (iommu_leak_tab) \
- iommu_leak_tab[x] = NULL; \
- } while (0)
-
/* Debugging aid for drivers that don't free their IOMMU tables */
-static void **iommu_leak_tab;
static int leak_trace;
static int iommu_leak_pages = 20;
static void dump_leak(void)
{
- int i;
static int dump;
- if (dump || !iommu_leak_tab)
+ if (dump)
return;
dump = 1;
- show_stack(NULL, NULL);
- /* Very crude. dump some from the end of the table too */
- printk(KERN_DEBUG "Dumping %d pages from end of IOMMU:\n",
- iommu_leak_pages);
- for (i = 0; i < iommu_leak_pages; i += 2) {
- printk(KERN_DEBUG "%lu: ", iommu_pages-i);
- printk_address((unsigned long) iommu_leak_tab[iommu_pages-i],
- 0);
- printk(KERN_CONT "%c", (i+1)%2 == 0 ? '\n' : ' ');
- }
- printk(KERN_DEBUG "\n");
+ show_stack(NULL, NULL);
+ debug_dma_dump_mappings(NULL);
}
-#else
-# define SET_LEAK(x)
-# define CLEAR_LEAK(x)
#endif
static void iommu_full(struct device *dev, size_t size, int dir)
for (i = 0; i < npages; i++) {
iommu_gatt_base[iommu_page + i] = GPTE_ENCODE(phys_mem);
- SET_LEAK(iommu_page + i);
phys_mem += PAGE_SIZE;
}
return iommu_bus_base + iommu_page*PAGE_SIZE + (phys_mem & ~PAGE_MASK);
npages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
for (i = 0; i < npages; i++) {
iommu_gatt_base[iommu_page + i] = gart_unmapped_entry;
- CLEAR_LEAK(iommu_page + i);
}
free_iommu(iommu_page, npages);
}
pages = iommu_num_pages(s->offset, s->length, PAGE_SIZE);
while (pages--) {
iommu_gatt_base[iommu_page] = GPTE_ENCODE(addr);
- SET_LEAK(iommu_page);
addr += PAGE_SIZE;
iommu_page++;
}
agp_gatt_table = gatt;
- enable_gart_translations();
-
error = sysdev_class_register(&gart_sysdev_class);
if (!error)
error = sysdev_register(&device_gart);
#ifdef CONFIG_IOMMU_LEAK
if (leak_trace) {
- iommu_leak_tab = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO,
- get_order(iommu_pages*sizeof(void *)));
- if (!iommu_leak_tab)
+ int ret;
+
+ ret = dma_debug_resize_entries(iommu_pages);
+ if (ret)
printk(KERN_DEBUG
- "PCI-DMA: Cannot allocate leak trace area\n");
+ "PCI-DMA: Cannot trace all the entries\n");
}
#endif
* the pages as Not-Present:
*/
wbinvd();
+
+ /*
+ * Now all caches are flushed and we can safely enable
+ * GART hardware. Doing it early leaves the possibility
+ * of stale cache entries that can lead to GART PTE
+ * errors.
+ */
+ enable_gart_translations();
/*
* Try to workaround a bug (thanks to BenH):
return paddr;
}
-phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr)
+phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
{
return baddr;
}
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/clockchips.h>
+#include <linux/random.h>
#include <trace/power.h>
#include <asm/system.h>
#include <asm/apic.h>
+#include <asm/syscalls.h>
#include <asm/idle.h>
#include <asm/uaccess.h>
#include <asm/i387.h>
+#include <asm/ds.h>
unsigned long idle_halt;
EXPORT_SYMBOL(idle_halt);
kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
tsk->thread.xstate = NULL;
}
+
+ WARN(tsk->thread.ds_ctx, "leaking DS context\n");
}
void free_thread_info(struct thread_info *ti)
put_cpu();
kfree(bp);
}
-
- ds_exit_thread(current);
}
void flush_thread(void)
}
early_param("idle", idle_setup);
+unsigned long arch_align_stack(unsigned long sp)
+{
+ if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+ sp -= get_random_int() % 8192;
+ return sp & ~0xf;
+}
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+ unsigned long range_end = mm->brk + 0x02000000;
+ return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
+}
+
* This file handles the architecture-dependent parts of process handling..
*/
-#include <stdarg.h>
-
#include <linux/stackprotector.h>
#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/ptrace.h>
-#include <linux/random.h>
#include <linux/personality.h>
#include <linux/tick.h>
#include <linux/percpu.h>
p->thread.io_bitmap_max = 0;
}
- ds_copy_thread(p, current);
+ clear_tsk_thread_flag(p, TIF_DS_AREA_MSR);
+ p->thread.ds_ctx = NULL;
clear_tsk_thread_flag(p, TIF_DEBUGCTLMSR);
p->thread.debugctlmsr = 0;
* done before math_state_restore, so the TS bit is up
* to date.
*/
- arch_leave_lazy_cpu_mode();
+ arch_end_context_switch(next_p);
/* If the task has used fpu the last 5 timeslices, just do a full
* restore of the math state immediately to avoid the trap; the
return 0;
}
-unsigned long arch_align_stack(unsigned long sp)
-{
- if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
- sp -= get_random_int() % 8192;
- return sp & ~0xf;
-}
-
-unsigned long arch_randomize_brk(struct mm_struct *mm)
-{
- unsigned long range_end = mm->brk + 0x02000000;
- return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
-}
* This file handles the architecture-dependent parts of process handling..
*/
-#include <stdarg.h>
-
#include <linux/stackprotector.h>
#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/ptrace.h>
-#include <linux/random.h>
#include <linux/notifier.h>
#include <linux/kprobes.h>
#include <linux/kdebug.h>
goto out;
}
- ds_copy_thread(p, me);
+ clear_tsk_thread_flag(p, TIF_DS_AREA_MSR);
+ p->thread.ds_ctx = NULL;
clear_tsk_thread_flag(p, TIF_DEBUGCTLMSR);
p->thread.debugctlmsr = 0;
* done before math_state_restore, so the TS bit is up
* to date.
*/
- arch_leave_lazy_cpu_mode();
+ arch_end_context_switch(next_p);
/*
* Switch FS and GS.
return do_arch_prctl(current, code, addr);
}
-unsigned long arch_align_stack(unsigned long sp)
-{
- if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
- sp -= get_random_int() % 8192;
- return sp & ~0xf;
-}
-
-unsigned long arch_randomize_brk(struct mm_struct *mm)
-{
- unsigned long range_end = mm->brk + 0x02000000;
- return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
-}
#include <linux/audit.h>
#include <linux/seccomp.h>
#include <linux/signal.h>
+#include <linux/workqueue.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
}
#ifdef CONFIG_X86_PTRACE_BTS
+/*
+ * A branch trace store context.
+ *
+ * Contexts may only be installed by ptrace_bts_config() and only for
+ * ptraced tasks.
+ *
+ * Contexts are destroyed when the tracee is detached from the tracer.
+ * The actual destruction work requires interrupts enabled, so the
+ * work is deferred and will be scheduled during __ptrace_unlink().
+ *
+ * Contexts hold an additional task_struct reference on the traced
+ * task, as well as a reference on the tracer's mm.
+ *
+ * Ptrace already holds a task_struct for the duration of ptrace operations,
+ * but since destruction is deferred, it may be executed after both
+ * tracer and tracee exited.
+ */
+struct bts_context {
+ /* The branch trace handle. */
+ struct bts_tracer *tracer;
+
+ /* The buffer used to store the branch trace and its size. */
+ void *buffer;
+ unsigned int size;
+
+ /* The mm that paid for the above buffer. */
+ struct mm_struct *mm;
+
+ /* The task this context belongs to. */
+ struct task_struct *task;
+
+ /* The signal to send on a bts buffer overflow. */
+ unsigned int bts_ovfl_signal;
+
+ /* The work struct to destroy a context. */
+ struct work_struct work;
+};
+
+static int alloc_bts_buffer(struct bts_context *context, unsigned int size)
+{
+ void *buffer = NULL;
+ int err = -ENOMEM;
+
+ err = account_locked_memory(current->mm, current->signal->rlim, size);
+ if (err < 0)
+ return err;
+
+ buffer = kzalloc(size, GFP_KERNEL);
+ if (!buffer)
+ goto out_refund;
+
+ context->buffer = buffer;
+ context->size = size;
+ context->mm = get_task_mm(current);
+
+ return 0;
+
+ out_refund:
+ refund_locked_memory(current->mm, size);
+ return err;
+}
+
+static inline void free_bts_buffer(struct bts_context *context)
+{
+ if (!context->buffer)
+ return;
+
+ kfree(context->buffer);
+ context->buffer = NULL;
+
+ refund_locked_memory(context->mm, context->size);
+ context->size = 0;
+
+ mmput(context->mm);
+ context->mm = NULL;
+}
+
+static void free_bts_context_work(struct work_struct *w)
+{
+ struct bts_context *context;
+
+ context = container_of(w, struct bts_context, work);
+
+ ds_release_bts(context->tracer);
+ put_task_struct(context->task);
+ free_bts_buffer(context);
+ kfree(context);
+}
+
+static inline void free_bts_context(struct bts_context *context)
+{
+ INIT_WORK(&context->work, free_bts_context_work);
+ schedule_work(&context->work);
+}
+
+static inline struct bts_context *alloc_bts_context(struct task_struct *task)
+{
+ struct bts_context *context = kzalloc(sizeof(*context), GFP_KERNEL);
+ if (context) {
+ context->task = task;
+ task->bts = context;
+
+ get_task_struct(task);
+ }
+
+ return context;
+}
+
static int ptrace_bts_read_record(struct task_struct *child, size_t index,
struct bts_struct __user *out)
{
+ struct bts_context *context;
const struct bts_trace *trace;
struct bts_struct bts;
const unsigned char *at;
int error;
- trace = ds_read_bts(child->bts);
+ context = child->bts;
+ if (!context)
+ return -ESRCH;
+
+ trace = ds_read_bts(context->tracer);
if (!trace)
- return -EPERM;
+ return -ESRCH;
at = trace->ds.top - ((index + 1) * trace->ds.size);
if ((void *)at < trace->ds.begin)
if (!trace->read)
return -EOPNOTSUPP;
- error = trace->read(child->bts, at, &bts);
+ error = trace->read(context->tracer, at, &bts);
if (error < 0)
return error;
long size,
struct bts_struct __user *out)
{
+ struct bts_context *context;
const struct bts_trace *trace;
const unsigned char *at;
int error, drained = 0;
- trace = ds_read_bts(child->bts);
+ context = child->bts;
+ if (!context)
+ return -ESRCH;
+
+ trace = ds_read_bts(context->tracer);
if (!trace)
- return -EPERM;
+ return -ESRCH;
if (!trace->read)
return -EOPNOTSUPP;
for (at = trace->ds.begin; (void *)at < trace->ds.top;
out++, drained++, at += trace->ds.size) {
struct bts_struct bts;
- int error;
- error = trace->read(child->bts, at, &bts);
+ error = trace->read(context->tracer, at, &bts);
if (error < 0)
return error;
memset(trace->ds.begin, 0, trace->ds.n * trace->ds.size);
- error = ds_reset_bts(child->bts);
+ error = ds_reset_bts(context->tracer);
if (error < 0)
return error;
return drained;
}
-static int ptrace_bts_allocate_buffer(struct task_struct *child, size_t size)
-{
- child->bts_buffer = alloc_locked_buffer(size);
- if (!child->bts_buffer)
- return -ENOMEM;
-
- child->bts_size = size;
-
- return 0;
-}
-
-static void ptrace_bts_free_buffer(struct task_struct *child)
-{
- free_locked_buffer(child->bts_buffer, child->bts_size);
- child->bts_buffer = NULL;
- child->bts_size = 0;
-}
-
static int ptrace_bts_config(struct task_struct *child,
long cfg_size,
const struct ptrace_bts_config __user *ucfg)
{
+ struct bts_context *context;
struct ptrace_bts_config cfg;
unsigned int flags = 0;
if (copy_from_user(&cfg, ucfg, sizeof(cfg)))
return -EFAULT;
- if (child->bts) {
- ds_release_bts(child->bts);
- child->bts = NULL;
- }
+ context = child->bts;
+ if (!context)
+ context = alloc_bts_context(child);
+ if (!context)
+ return -ENOMEM;
if (cfg.flags & PTRACE_BTS_O_SIGNAL) {
if (!cfg.signal)
return -EINVAL;
- child->thread.bts_ovfl_signal = cfg.signal;
return -EOPNOTSUPP;
+ context->bts_ovfl_signal = cfg.signal;
}
- if ((cfg.flags & PTRACE_BTS_O_ALLOC) &&
- (cfg.size != child->bts_size)) {
- int error;
+ ds_release_bts(context->tracer);
+ context->tracer = NULL;
- ptrace_bts_free_buffer(child);
+ if ((cfg.flags & PTRACE_BTS_O_ALLOC) && (cfg.size != context->size)) {
+ int err;
- error = ptrace_bts_allocate_buffer(child, cfg.size);
- if (error < 0)
- return error;
+ free_bts_buffer(context);
+ if (!cfg.size)
+ return 0;
+
+ err = alloc_bts_buffer(context, cfg.size);
+ if (err < 0)
+ return err;
}
if (cfg.flags & PTRACE_BTS_O_TRACE)
if (cfg.flags & PTRACE_BTS_O_SCHED)
flags |= BTS_TIMESTAMPS;
- child->bts = ds_request_bts(child, child->bts_buffer, child->bts_size,
- /* ovfl = */ NULL, /* th = */ (size_t)-1,
- flags);
- if (IS_ERR(child->bts)) {
- int error = PTR_ERR(child->bts);
-
- ptrace_bts_free_buffer(child);
- child->bts = NULL;
+ context->tracer =
+ ds_request_bts_task(child, context->buffer, context->size,
+ NULL, (size_t)-1, flags);
+ if (unlikely(IS_ERR(context->tracer))) {
+ int error = PTR_ERR(context->tracer);
+ free_bts_buffer(context);
+ context->tracer = NULL;
return error;
}
long cfg_size,
struct ptrace_bts_config __user *ucfg)
{
+ struct bts_context *context;
const struct bts_trace *trace;
struct ptrace_bts_config cfg;
+ context = child->bts;
+ if (!context)
+ return -ESRCH;
+
if (cfg_size < sizeof(cfg))
return -EIO;
- trace = ds_read_bts(child->bts);
+ trace = ds_read_bts(context->tracer);
if (!trace)
- return -EPERM;
+ return -ESRCH;
memset(&cfg, 0, sizeof(cfg));
- cfg.size = trace->ds.end - trace->ds.begin;
- cfg.signal = child->thread.bts_ovfl_signal;
- cfg.bts_size = sizeof(struct bts_struct);
+ cfg.size = trace->ds.end - trace->ds.begin;
+ cfg.signal = context->bts_ovfl_signal;
+ cfg.bts_size = sizeof(struct bts_struct);
if (cfg.signal)
cfg.flags |= PTRACE_BTS_O_SIGNAL;
static int ptrace_bts_clear(struct task_struct *child)
{
+ struct bts_context *context;
const struct bts_trace *trace;
- trace = ds_read_bts(child->bts);
+ context = child->bts;
+ if (!context)
+ return -ESRCH;
+
+ trace = ds_read_bts(context->tracer);
if (!trace)
- return -EPERM;
+ return -ESRCH;
memset(trace->ds.begin, 0, trace->ds.n * trace->ds.size);
- return ds_reset_bts(child->bts);
+ return ds_reset_bts(context->tracer);
}
static int ptrace_bts_size(struct task_struct *child)
{
+ struct bts_context *context;
const struct bts_trace *trace;
- trace = ds_read_bts(child->bts);
+ context = child->bts;
+ if (!context)
+ return -ESRCH;
+
+ trace = ds_read_bts(context->tracer);
if (!trace)
- return -EPERM;
+ return -ESRCH;
return (trace->ds.top - trace->ds.begin) / trace->ds.size;
}
-static void ptrace_bts_fork(struct task_struct *tsk)
-{
- tsk->bts = NULL;
- tsk->bts_buffer = NULL;
- tsk->bts_size = 0;
- tsk->thread.bts_ovfl_signal = 0;
-}
-
-static void ptrace_bts_untrace(struct task_struct *child)
+/*
+ * Called from __ptrace_unlink() after the child has been moved back
+ * to its original parent.
+ */
+void ptrace_bts_untrace(struct task_struct *child)
{
if (unlikely(child->bts)) {
- ds_release_bts(child->bts);
+ free_bts_context(child->bts);
child->bts = NULL;
-
- /* We cannot update total_vm and locked_vm since
- child's mm is already gone. But we can reclaim the
- memory. */
- kfree(child->bts_buffer);
- child->bts_buffer = NULL;
- child->bts_size = 0;
}
}
-
-static void ptrace_bts_detach(struct task_struct *child)
-{
- /*
- * Ptrace_detach() races with ptrace_untrace() in case
- * the child dies and is reaped by another thread.
- *
- * We only do the memory accounting at this point and
- * leave the buffer deallocation and the bts tracer
- * release to ptrace_bts_untrace() which will be called
- * later on with tasklist_lock held.
- */
- release_locked_buffer(child->bts_buffer, child->bts_size);
-}
-#else
-static inline void ptrace_bts_fork(struct task_struct *tsk) {}
-static inline void ptrace_bts_detach(struct task_struct *child) {}
-static inline void ptrace_bts_untrace(struct task_struct *child) {}
#endif /* CONFIG_X86_PTRACE_BTS */
-void x86_ptrace_fork(struct task_struct *child, unsigned long clone_flags)
-{
- ptrace_bts_fork(child);
-}
-
-void x86_ptrace_untrace(struct task_struct *child)
-{
- ptrace_bts_untrace(child);
-}
-
/*
* Called by kernel/ptrace.c when detaching..
*
#ifdef TIF_SYSCALL_EMU
clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
#endif
- ptrace_bts_detach(child);
}
#if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
break;
}
}
+#endif
+
+#if defined(CONFIG_PCI) && defined(CONFIG_NUMA)
+/* Set correct numa_node information for AMD NB functions */
+static void __init quirk_amd_nb_node(struct pci_dev *dev)
+{
+ struct pci_dev *nb_ht;
+ unsigned int devfn;
+ u32 val;
+
+ devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 0);
+ nb_ht = pci_get_slot(dev->bus, devfn);
+ if (!nb_ht)
+ return;
+
+ pci_read_config_dword(nb_ht, 0x60, &val);
+ set_dev_node(&dev->dev, val & 7);
+ pci_dev_put(dev);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_HT,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MAP,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_DRAM,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC,
+ quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_LINK,
+ quirk_amd_nb_node);
#endif
DMI_MATCH(DMI_BOARD_NAME, "0KP561"),
},
},
+ { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */
+ .callback = set_bios_reboot,
+ .ident = "Dell OptiPlex 360",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"),
+ DMI_MATCH(DMI_BOARD_NAME, "0T656F"),
+ },
+ },
{ /* Handle problems with rebooting on Dell 2400's */
.callback = set_bios_reboot,
.ident = "Dell PowerEdge 2400",
#define ARCH_SETUP
#endif
+/*
+ * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
+ * The direct mapping extends to max_pfn_mapped, so that we can directly access
+ * apertures, ACPI and other tables without having to play with fixmaps.
+ */
+unsigned long max_low_pfn_mapped;
+unsigned long max_pfn_mapped;
+
RESERVE_BRK(dmi_alloc, 65536);
unsigned int boot_cpu_id __read_mostly;
unsigned long mmu_cr4_features = X86_CR4_PAE;
#endif
-/* Boot loader ID as an integer, for the benefit of proc_dointvec */
-int bootloader_type;
+/* Boot loader ID and version as integers, for the benefit of proc_dointvec */
+int bootloader_type, bootloader_version;
/*
* Setup options
#endif
saved_video_mode = boot_params.hdr.vid_mode;
bootloader_type = boot_params.hdr.type_of_loader;
+ if ((bootloader_type >> 4) == 0xe) {
+ bootloader_type &= 0xf;
+ bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
+ }
+ bootloader_version = bootloader_type & 0xf;
+ bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
#ifdef CONFIG_BLK_DEV_RAM
rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
max_low_pfn = max_pfn;
high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
+ max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
#endif
#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
setup_bios_corruption_check();
#endif
+ printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
+ max_pfn_mapped<<PAGE_SHIFT);
+
reserve_brk();
/* max_pfn_mapped is updated here */
#ifdef CONFIG_X86_32
-/**
- * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors
- *
- * Description:
- * Perform any necessary interrupt initialisation prior to setting up
- * the "ordinary" interrupt call gates. For legacy reasons, the ISA
- * interrupts should be initialised here if the machine emulates a PC
- * in any way.
- **/
-void __init x86_quirk_pre_intr_init(void)
-{
- if (x86_quirks->arch_pre_intr_init) {
- if (x86_quirks->arch_pre_intr_init())
- return;
- }
- init_ISA_irqs();
-}
-
/**
* x86_quirk_intr_init - post gate setup interrupt initialisation
*
early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
#endif
+#if defined(CONFIG_X86_64) && defined(CONFIG_NUMA)
+ /*
+ * make sure boot cpu node_number is right, when boot cpu is on the
+ * node that doesn't have mem installed
+ */
+ per_cpu(node_number, boot_cpu_id) = cpu_to_node(boot_cpu_id);
+#endif
+
/* Setup node to cpumask map */
setup_node_to_cpumask_map();
* 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
* 2000-2002 x86-64 support by Andi Kleen
*/
-
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
}
struct smp_ops smp_ops = {
- .smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
- .smp_prepare_cpus = native_smp_prepare_cpus,
- .smp_cpus_done = native_smp_cpus_done,
+ .smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
+ .smp_prepare_cpus = native_smp_prepare_cpus,
+ .smp_cpus_done = native_smp_cpus_done,
- .smp_send_stop = native_smp_send_stop,
- .smp_send_reschedule = native_smp_send_reschedule,
+ .smp_send_stop = native_smp_send_stop,
+ .smp_send_reschedule = native_smp_send_reschedule,
- .cpu_up = native_cpu_up,
- .cpu_die = native_cpu_die,
- .cpu_disable = native_cpu_disable,
- .play_dead = native_play_dead,
+ .cpu_up = native_cpu_up,
+ .cpu_die = native_cpu_die,
+ .cpu_disable = native_cpu_disable,
+ .play_dead = native_play_dead,
- .send_call_func_ipi = native_send_call_func_ipi,
+ .send_call_func_ipi = native_send_call_func_ipi,
.send_call_func_single_ipi = native_send_call_func_single_ipi,
};
EXPORT_SYMBOL_GPL(smp_ops);
* INIT, INIT, STARTUP sequence will reset the chip hard for us, and this
* won't ... remember to clear down the APIC, etc later.
*/
-int __devinit
+int __cpuinit
wakeup_secondary_cpu_via_nmi(int logical_apicid, unsigned long start_eip)
{
unsigned long send_status, accept_status = 0;
return (send_status | accept_status);
}
-int __devinit
+static int __cpuinit
wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip)
{
unsigned long send_status, accept_status = 0;
/* mark "stuck" area as not stuck */
*((volatile unsigned long *)trampoline_base) = 0;
- /*
- * Cleanup possible dangling ends...
- */
- smpboot_restore_warm_reset_vector();
+ if (get_uv_system_type() != UV_NON_UNIQUE_APIC) {
+ /*
+ * Cleanup possible dangling ends...
+ */
+ smpboot_restore_warm_reset_vector();
+ }
return boot_error;
}
*/
if (APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid]) &&
!cpu_has_apic) {
- printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
- boot_cpu_physical_apicid);
- printk(KERN_ERR "... forcing use of dummy APIC emulation."
+ if (!disable_apic) {
+ pr_err("BIOS bug, local APIC #%d not detected!...\n",
+ boot_cpu_physical_apicid);
+ pr_err("... forcing use of dummy APIC emulation."
"(tell your hw vendor)\n");
+ }
smpboot_clear_io_apic();
arch_disable_smp_support();
return -1;
static int save_stack_stack(void *data, char *name)
{
- return -1;
+ return 0;
}
static void save_stack_address(void *data, unsigned long addr, int reliable)
.long sys_inotify_init1
.long sys_preadv
.long sys_pwritev
+ .long sys_rt_tgsigqueueinfo /* 335 */
+ .long sys_perf_counter_open
struct bau_desc *adp;
struct bau_desc *ad2;
- adp = (struct bau_desc *)kmalloc_node(16384, GFP_KERNEL, node);
+ /*
+ * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR)
+ * per cpu; and up to 32 (UV_ADP_SIZE) cpu's per blade
+ */
+ adp = (struct bau_desc *)kmalloc_node(sizeof(struct bau_desc)*
+ UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node);
BUG_ON(!adp);
pa = uv_gpa(adp); /* need the real nasid*/
(n << UV_DESC_BASE_PNODE_SHIFT | m));
}
- for (i = 0, ad2 = adp; i < UV_ACTIVATION_DESCRIPTOR_SIZE; i++, ad2++) {
+ /*
+ * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
+ * cpu even though we only use the first one; one descriptor can
+ * describe a broadcast to 256 nodes.
+ */
+ for (i = 0, ad2 = adp; i < (UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR);
+ i++, ad2++) {
memset(ad2, 0, sizeof(struct bau_desc));
ad2->header.sw_ack_flag = 1;
/*
}
clts(); /* Allow maths ops (or we recurse) */
-#ifdef CONFIG_X86_32
- restore_fpu(tsk);
-#else
/*
* Paranoid restore. send a SIGSEGV if we fail to restore the state.
*/
force_sig(SIGSEGV, tsk);
return;
}
-#endif
+
thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
tsk->fpu_counter++;
}
#endif
set_intr_gate(19, &simd_coprocessor_error);
+ /* Reserve all the builtin and the syscall vector: */
+ for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
+ set_bit(i, used_vectors);
+
#ifdef CONFIG_IA32_EMULATION
set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
+ set_bit(IA32_SYSCALL_VECTOR, used_vectors);
#endif
#ifdef CONFIG_X86_32
}
set_system_trap_gate(SYSCALL_VECTOR, &system_call);
-#endif
-
- /* Reserve all the builtin and the syscall vector: */
- for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
- set_bit(i, used_vectors);
-
-#ifdef CONFIG_X86_64
- set_bit(IA32_SYSCALL_VECTOR, used_vectors);
-#else
set_bit(SYSCALL_VECTOR, used_vectors);
#endif
+
/*
* Should be a barrier for any external CPU state:
*/
{
u64 tsc1, tsc2, delta, ref1, ref2;
unsigned long tsc_pit_min = ULONG_MAX, tsc_ref_min = ULONG_MAX;
- unsigned long flags, latch, ms, fast_calibrate, tsc_khz;
+ unsigned long flags, latch, ms, fast_calibrate, hv_tsc_khz;
int hpet = is_hpet_enabled(), i, loopmin;
- tsc_khz = get_hypervisor_tsc_freq();
- if (tsc_khz) {
+ hv_tsc_khz = get_hypervisor_tsc_freq();
+ if (hv_tsc_khz) {
printk(KERN_INFO "TSC: Frequency read from the hypervisor\n");
- return tsc_khz;
+ return hv_tsc_khz;
}
local_irq_save(flags);
#ifdef CONFIG_X86_64
static cycle_t __vsyscall_fn vread_tsc(void)
{
- cycle_t ret = (cycle_t)vget_cycles();
+ cycle_t ret;
+
+ /*
+ * Surround the RDTSC by barriers, to make sure it's not
+ * speculated to outside the seqlock critical section and
+ * does not cause time warps:
+ */
+ rdtsc_barrier();
+ ret = (cycle_t)vget_cycles();
+ rdtsc_barrier();
return ret >= __vsyscall_gtod_data.clock.cycle_last ?
ret : __vsyscall_gtod_data.clock.cycle_last;
* of a critical section, to be able to prove TSC time-warps:
*/
static __cpuinitdata raw_spinlock_t sync_lock = __RAW_SPIN_LOCK_UNLOCKED;
+
static __cpuinitdata cycles_t last_tsc;
static __cpuinitdata cycles_t max_warp;
static __cpuinitdata int nr_warps;
return;
if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) {
- printk(KERN_INFO
- "Skipping synchronization checks as TSC is reliable.\n");
+ pr_info("Skipping synchronization checks as TSC is reliable.\n");
return;
}
- printk(KERN_INFO "checking TSC synchronization [CPU#%d -> CPU#%d]:",
- smp_processor_id(), cpu);
+ pr_info("checking TSC synchronization [CPU#%d -> CPU#%d]:",
+ smp_processor_id(), cpu);
/*
* Reset it - in case this is a second bootup:
if (nr_warps) {
printk("\n");
- printk(KERN_WARNING "Measured %Ld cycles TSC warp between CPUs,"
- " turning off TSC clock.\n", max_warp);
+ pr_warning("Measured %Ld cycles TSC warp between CPUs, "
+ "turning off TSC clock.\n", max_warp);
mark_tsc_unstable("check_tsc_sync_source failed");
} else {
printk(" passed.\n");
while (atomic_read(&stop_count) != cpus)
cpu_relax();
}
-#undef NR_LOOPS
-
info->regs.pt.ds = 0;
info->regs.pt.es = 0;
info->regs.pt.fs = 0;
-
-/* we are clearing gs later just before "jmp resume_userspace",
- * because it is not saved/restored.
- */
+#ifndef CONFIG_X86_32_LAZY_GS
+ info->regs.pt.gs = 0;
+#endif
/*
* The flags register is also special: we cannot trust that the user
}
/*
- * Save old state, set default return value (%ax) to 0
+ * Save old state, set default return value (%ax) to 0 (VM86_SIGNAL)
*/
- info->regs32->ax = 0;
+ info->regs32->ax = VM86_SIGNAL;
tsk->thread.saved_sp0 = tsk->thread.sp0;
tsk->thread.saved_fs = info->regs32->fs;
tsk->thread.saved_gs = get_user_gs(info->regs32);
__asm__ __volatile__(
"movl %0,%%esp\n\t"
"movl %1,%%ebp\n\t"
+#ifdef CONFIG_X86_32_LAZY_GS
"mov %2, %%gs\n\t"
+#endif
"jmp resume_userspace"
: /* no outputs */
:"r" (&info->regs), "r" (task_thread_info(tsk)), "r" (0));
}
#endif
-static void vmi_enter_lazy_cpu(void)
+static void vmi_start_context_switch(struct task_struct *prev)
{
- paravirt_enter_lazy_cpu();
+ paravirt_start_context_switch(prev);
vmi_ops.set_lazy_mode(2);
}
+static void vmi_end_context_switch(struct task_struct *next)
+{
+ vmi_ops.set_lazy_mode(0);
+ paravirt_end_context_switch(next);
+}
+
static void vmi_enter_lazy_mmu(void)
{
paravirt_enter_lazy_mmu();
vmi_ops.set_lazy_mode(1);
}
-static void vmi_leave_lazy(void)
+static void vmi_leave_lazy_mmu(void)
{
- paravirt_leave_lazy(paravirt_get_lazy_mode());
vmi_ops.set_lazy_mode(0);
+ paravirt_leave_lazy_mmu();
}
static inline int __init check_vmi_rom(struct vrom_header *rom)
para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
para_fill(pv_cpu_ops.io_delay, IODelay);
- para_wrap(pv_cpu_ops.lazy_mode.enter, vmi_enter_lazy_cpu,
+ para_wrap(pv_cpu_ops.start_context_switch, vmi_start_context_switch,
set_lazy_mode, SetLazyMode);
- para_wrap(pv_cpu_ops.lazy_mode.leave, vmi_leave_lazy,
+ para_wrap(pv_cpu_ops.end_context_switch, vmi_end_context_switch,
set_lazy_mode, SetLazyMode);
para_wrap(pv_mmu_ops.lazy_mode.enter, vmi_enter_lazy_mmu,
set_lazy_mode, SetLazyMode);
- para_wrap(pv_mmu_ops.lazy_mode.leave, vmi_leave_lazy,
+ para_wrap(pv_mmu_ops.lazy_mode.leave, vmi_leave_lazy_mmu,
set_lazy_mode, SetLazyMode);
/* user and kernel flush are just handled with different flags to FlushTLB */
+/*
+ * ld script for the x86 kernel
+ *
+ * Historic 32-bit version written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ *
+ * Modernisation, unification and other changes and fixes:
+ * Copyright (C) 2007-2009 Sam Ravnborg <sam@ravnborg.org>
+ *
+ *
+ * Don't define absolute symbols until and unless you know that symbol
+ * value is should remain constant even if kernel image is relocated
+ * at run time. Absolute symbols are not relocated. If symbol value should
+ * change if kernel is relocated, make the symbol section relative and
+ * put it inside the section definition.
+ */
+
#ifdef CONFIG_X86_32
-# include "vmlinux_32.lds.S"
+#define LOAD_OFFSET __PAGE_OFFSET
#else
-# include "vmlinux_64.lds.S"
+#define LOAD_OFFSET __START_KERNEL_map
#endif
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/page_types.h>
+#include <asm/cache.h>
+#include <asm/boot.h>
+
+#undef i386 /* in case the preprocessor is a 32bit one */
+
+OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)
+
+#ifdef CONFIG_X86_32
+OUTPUT_ARCH(i386)
+ENTRY(phys_startup_32)
+jiffies = jiffies_64;
+#else
+OUTPUT_ARCH(i386:x86-64)
+ENTRY(phys_startup_64)
+jiffies_64 = jiffies;
+#endif
+
+PHDRS {
+ text PT_LOAD FLAGS(5); /* R_E */
+ data PT_LOAD FLAGS(7); /* RWE */
+#ifdef CONFIG_X86_64
+ user PT_LOAD FLAGS(7); /* RWE */
+ data.init PT_LOAD FLAGS(7); /* RWE */
+#ifdef CONFIG_SMP
+ percpu PT_LOAD FLAGS(7); /* RWE */
+#endif
+ data.init2 PT_LOAD FLAGS(7); /* RWE */
+#endif
+ note PT_NOTE FLAGS(0); /* ___ */
+}
+
+SECTIONS
+{
+#ifdef CONFIG_X86_32
+ . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR;
+ phys_startup_32 = startup_32 - LOAD_OFFSET;
+#else
+ . = __START_KERNEL;
+ phys_startup_64 = startup_64 - LOAD_OFFSET;
+#endif
+
+ /* Text and read-only data */
+
+ /* bootstrapping code */
+ .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) {
+ _text = .;
+ *(.text.head)
+ } :text = 0x9090
+
+ /* The rest of the text */
+ .text : AT(ADDR(.text) - LOAD_OFFSET) {
+#ifdef CONFIG_X86_32
+ /* not really needed, already page aligned */
+ . = ALIGN(PAGE_SIZE);
+ *(.text.page_aligned)
+#endif
+ . = ALIGN(8);
+ _stext = .;
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ KPROBES_TEXT
+ IRQENTRY_TEXT
+ *(.fixup)
+ *(.gnu.warning)
+ /* End of text section */
+ _etext = .;
+ } :text = 0x9090
+
+ NOTES :text :note
+
+ /* Exception table */
+ . = ALIGN(16);
+ __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
+ __start___ex_table = .;
+ *(__ex_table)
+ __stop___ex_table = .;
+ } :text = 0x9090
+
+ RODATA
+
+ /* Data */
+ . = ALIGN(PAGE_SIZE);
+ .data : AT(ADDR(.data) - LOAD_OFFSET) {
+ DATA_DATA
+ CONSTRUCTORS
+
+#ifdef CONFIG_X86_64
+ /* End of data section */
+ _edata = .;
+#endif
+ } :data
+
+#ifdef CONFIG_X86_32
+ /* 32 bit has nosave before _edata */
+ . = ALIGN(PAGE_SIZE);
+ .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
+ __nosave_begin = .;
+ *(.data.nosave)
+ . = ALIGN(PAGE_SIZE);
+ __nosave_end = .;
+ }
+#endif
+
+ . = ALIGN(PAGE_SIZE);
+ .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
+ *(.data.page_aligned)
+ *(.data.idt)
+ }
+
+#ifdef CONFIG_X86_32
+ . = ALIGN(32);
+#else
+ . = ALIGN(PAGE_SIZE);
+ . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
+#endif
+ .data.cacheline_aligned :
+ AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
+ *(.data.cacheline_aligned)
+ }
+
+ /* rarely changed data like cpu maps */
+#ifdef CONFIG_X86_32
+ . = ALIGN(32);
+#else
+ . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
+#endif
+ .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
+ *(.data.read_mostly)
+
+#ifdef CONFIG_X86_32
+ /* End of data section */
+ _edata = .;
+#endif
+ }
+
+#ifdef CONFIG_X86_64
+
+#define VSYSCALL_ADDR (-10*1024*1024)
+#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + \
+ SIZEOF(.data.read_mostly) + 4095) & ~(4095))
+#define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + \
+ SIZEOF(.data.read_mostly) + 4095) & ~(4095))
+
+#define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
+#define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
+
+#define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
+#define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
+
+ . = VSYSCALL_ADDR;
+ .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) {
+ *(.vsyscall_0)
+ } :user
+
+ __vsyscall_0 = VSYSCALL_VIRT_ADDR;
+
+ . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
+ .vsyscall_fn : AT(VLOAD(.vsyscall_fn)) {
+ *(.vsyscall_fn)
+ }
+
+ . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
+ .vsyscall_gtod_data : AT(VLOAD(.vsyscall_gtod_data)) {
+ *(.vsyscall_gtod_data)
+ }
+
+ vsyscall_gtod_data = VVIRT(.vsyscall_gtod_data);
+ .vsyscall_clock : AT(VLOAD(.vsyscall_clock)) {
+ *(.vsyscall_clock)
+ }
+ vsyscall_clock = VVIRT(.vsyscall_clock);
+
+
+ .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1)) {
+ *(.vsyscall_1)
+ }
+ .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2)) {
+ *(.vsyscall_2)
+ }
+
+ .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) {
+ *(.vgetcpu_mode)
+ }
+ vgetcpu_mode = VVIRT(.vgetcpu_mode);
+
+ . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
+ .jiffies : AT(VLOAD(.jiffies)) {
+ *(.jiffies)
+ }
+ jiffies = VVIRT(.jiffies);
+
+ .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) {
+ *(.vsyscall_3)
+ }
+
+ . = VSYSCALL_VIRT_ADDR + PAGE_SIZE;
+
+#undef VSYSCALL_ADDR
+#undef VSYSCALL_PHYS_ADDR
+#undef VSYSCALL_VIRT_ADDR
+#undef VLOAD_OFFSET
+#undef VLOAD
+#undef VVIRT_OFFSET
+#undef VVIRT
+
+#endif /* CONFIG_X86_64 */
+
+ /* init_task */
+ . = ALIGN(THREAD_SIZE);
+ .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
+ *(.data.init_task)
+ }
+#ifdef CONFIG_X86_64
+ :data.init
+#endif
+
+ /*
+ * smp_locks might be freed after init
+ * start/end must be page aligned
+ */
+ . = ALIGN(PAGE_SIZE);
+ .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
+ __smp_locks = .;
+ *(.smp_locks)
+ __smp_locks_end = .;
+ . = ALIGN(PAGE_SIZE);
+ }
+
+ /* Init code and data - will be freed after init */
+ . = ALIGN(PAGE_SIZE);
+ .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
+ __init_begin = .; /* paired with __init_end */
+ _sinittext = .;
+ INIT_TEXT
+ _einittext = .;
+ }
+
+ .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
+ INIT_DATA
+ }
+
+ . = ALIGN(16);
+ .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
+ __setup_start = .;
+ *(.init.setup)
+ __setup_end = .;
+ }
+ .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
+ __initcall_start = .;
+ INITCALLS
+ __initcall_end = .;
+ }
+
+ .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
+ __con_initcall_start = .;
+ *(.con_initcall.init)
+ __con_initcall_end = .;
+ }
+
+ .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
+ __x86_cpu_dev_start = .;
+ *(.x86_cpu_dev.init)
+ __x86_cpu_dev_end = .;
+ }
+
+ SECURITY_INIT
+
+ . = ALIGN(8);
+ .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
+ __parainstructions = .;
+ *(.parainstructions)
+ __parainstructions_end = .;
+ }
+
+ . = ALIGN(8);
+ .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
+ __alt_instructions = .;
+ *(.altinstructions)
+ __alt_instructions_end = .;
+ }
+
+ .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
+ *(.altinstr_replacement)
+ }
+
+ /*
+ * .exit.text is discard at runtime, not link time, to deal with
+ * references from .altinstructions and .eh_frame
+ */
+ .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
+ EXIT_TEXT
+ }
+
+ .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
+ EXIT_DATA
+ }
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ . = ALIGN(PAGE_SIZE);
+ .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
+ __initramfs_start = .;
+ *(.init.ramfs)
+ __initramfs_end = .;
+ }
+#endif
+
+#if defined(CONFIG_X86_64) && defined(CONFIG_SMP)
+ /*
+ * percpu offsets are zero-based on SMP. PERCPU_VADDR() changes the
+ * output PHDR, so the next output section - __data_nosave - should
+ * start another section data.init2. Also, pda should be at the head of
+ * percpu area. Preallocate it and define the percpu offset symbol
+ * so that it can be accessed as a percpu variable.
+ */
+ . = ALIGN(PAGE_SIZE);
+ PERCPU_VADDR(0, :percpu)
+#else
+ PERCPU(PAGE_SIZE)
+#endif
+
+ . = ALIGN(PAGE_SIZE);
+
+ /* freed after init ends here */
+ .init.end : AT(ADDR(.init.end) - LOAD_OFFSET) {
+ __init_end = .;
+ }
+
+#ifdef CONFIG_X86_64
+ .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
+ . = ALIGN(PAGE_SIZE);
+ __nosave_begin = .;
+ *(.data.nosave)
+ . = ALIGN(PAGE_SIZE);
+ __nosave_end = .;
+ } :data.init2
+ /* use another section data.init2, see PERCPU_VADDR() above */
+#endif
+
+ /* BSS */
+ . = ALIGN(PAGE_SIZE);
+ .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
+ __bss_start = .;
+ *(.bss.page_aligned)
+ *(.bss)
+ . = ALIGN(4);
+ __bss_stop = .;
+ }
+
+ . = ALIGN(PAGE_SIZE);
+ .brk : AT(ADDR(.brk) - LOAD_OFFSET) {
+ __brk_base = .;
+ . += 64 * 1024; /* 64k alignment slop space */
+ *(.brk_reservation) /* areas brk users have reserved */
+ __brk_limit = .;
+ }
+
+ .end : AT(ADDR(.end) - LOAD_OFFSET) {
+ _end = .;
+ }
+
+ /* Sections to be discarded */
+ /DISCARD/ : {
+ *(.exitcall.exit)
+ *(.eh_frame)
+ *(.discard)
+ }
+
+ STABS_DEBUG
+ DWARF_DEBUG
+}
+
+
+#ifdef CONFIG_X86_32
+ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE),
+ "kernel image bigger than KERNEL_IMAGE_SIZE")
+#else
+/*
+ * Per-cpu symbols which need to be offset from __per_cpu_load
+ * for the boot processor.
+ */
+#define INIT_PER_CPU(x) init_per_cpu__##x = per_cpu__##x + __per_cpu_load
+INIT_PER_CPU(gdt_page);
+INIT_PER_CPU(irq_stack_union);
+
+/*
+ * Build-time check on the image size:
+ */
+ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
+ "kernel image bigger than KERNEL_IMAGE_SIZE")
+
+#ifdef CONFIG_SMP
+ASSERT((per_cpu__irq_stack_union == 0),
+ "irq_stack_union is not at start of per-cpu area");
+#endif
+
+#endif /* CONFIG_X86_32 */
+
+#ifdef CONFIG_KEXEC
+#include <asm/kexec.h>
+
+ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
+ "kexec control code size is too big")
+#endif
+
+++ /dev/null
-/* ld script to make i386 Linux kernel
- * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
- *
- * Don't define absolute symbols until and unless you know that symbol
- * value is should remain constant even if kernel image is relocated
- * at run time. Absolute symbols are not relocated. If symbol value should
- * change if kernel is relocated, make the symbol section relative and
- * put it inside the section definition.
- */
-
-#define LOAD_OFFSET __PAGE_OFFSET
-
-#include <asm-generic/vmlinux.lds.h>
-#include <asm/thread_info.h>
-#include <asm/page_types.h>
-#include <asm/cache.h>
-#include <asm/boot.h>
-
-OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
-OUTPUT_ARCH(i386)
-ENTRY(phys_startup_32)
-jiffies = jiffies_64;
-
-PHDRS {
- text PT_LOAD FLAGS(5); /* R_E */
- data PT_LOAD FLAGS(7); /* RWE */
- note PT_NOTE FLAGS(0); /* ___ */
-}
-SECTIONS
-{
- . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR;
- phys_startup_32 = startup_32 - LOAD_OFFSET;
-
- .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) {
- _text = .; /* Text and read-only data */
- *(.text.head)
- } :text = 0x9090
-
- /* read-only */
- .text : AT(ADDR(.text) - LOAD_OFFSET) {
- . = ALIGN(PAGE_SIZE); /* not really needed, already page aligned */
- *(.text.page_aligned)
- TEXT_TEXT
- SCHED_TEXT
- LOCK_TEXT
- KPROBES_TEXT
- IRQENTRY_TEXT
- *(.fixup)
- *(.gnu.warning)
- _etext = .; /* End of text section */
- } :text = 0x9090
-
- NOTES :text :note
-
- . = ALIGN(16); /* Exception table */
- __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
- __start___ex_table = .;
- *(__ex_table)
- __stop___ex_table = .;
- } :text = 0x9090
-
- RODATA
-
- /* writeable */
- . = ALIGN(PAGE_SIZE);
- .data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
- DATA_DATA
- CONSTRUCTORS
- } :data
-
- . = ALIGN(PAGE_SIZE);
- .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
- __nosave_begin = .;
- *(.data.nosave)
- . = ALIGN(PAGE_SIZE);
- __nosave_end = .;
- }
-
- . = ALIGN(PAGE_SIZE);
- .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
- *(.data.page_aligned)
- *(.data.idt)
- }
-
- . = ALIGN(32);
- .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
- *(.data.cacheline_aligned)
- }
-
- /* rarely changed data like cpu maps */
- . = ALIGN(32);
- .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
- *(.data.read_mostly)
- _edata = .; /* End of data section */
- }
-
- . = ALIGN(THREAD_SIZE); /* init_task */
- .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
- *(.data.init_task)
- }
-
- /* might get freed after init */
- . = ALIGN(PAGE_SIZE);
- .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
- __smp_locks = .;
- *(.smp_locks)
- __smp_locks_end = .;
- }
- /* will be freed after init
- * Following ALIGN() is required to make sure no other data falls on the
- * same page where __smp_alt_end is pointing as that page might be freed
- * after boot. Always make sure that ALIGN() directive is present after
- * the section which contains __smp_alt_end.
- */
- . = ALIGN(PAGE_SIZE);
-
- /* will be freed after init */
- . = ALIGN(PAGE_SIZE); /* Init code and data */
- .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
- __init_begin = .;
- _sinittext = .;
- INIT_TEXT
- _einittext = .;
- }
- .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
- INIT_DATA
- }
- . = ALIGN(16);
- .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
- __setup_start = .;
- *(.init.setup)
- __setup_end = .;
- }
- .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
- __initcall_start = .;
- INITCALLS
- __initcall_end = .;
- }
- .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
- __con_initcall_start = .;
- *(.con_initcall.init)
- __con_initcall_end = .;
- }
- .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
- __x86_cpu_dev_start = .;
- *(.x86_cpu_dev.init)
- __x86_cpu_dev_end = .;
- }
- SECURITY_INIT
- . = ALIGN(4);
- .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
- __alt_instructions = .;
- *(.altinstructions)
- __alt_instructions_end = .;
- }
- .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
- *(.altinstr_replacement)
- }
- . = ALIGN(4);
- .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
- __parainstructions = .;
- *(.parainstructions)
- __parainstructions_end = .;
- }
- /* .exit.text is discard at runtime, not link time, to deal with references
- from .altinstructions and .eh_frame */
- .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
- EXIT_TEXT
- }
- .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
- EXIT_DATA
- }
-#if defined(CONFIG_BLK_DEV_INITRD)
- . = ALIGN(PAGE_SIZE);
- .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
- __initramfs_start = .;
- *(.init.ramfs)
- __initramfs_end = .;
- }
-#endif
- PERCPU(PAGE_SIZE)
- . = ALIGN(PAGE_SIZE);
- /* freed after init ends here */
-
- .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
- __init_end = .;
- __bss_start = .; /* BSS */
- *(.bss.page_aligned)
- *(.bss)
- . = ALIGN(4);
- __bss_stop = .;
- }
-
- .brk : AT(ADDR(.brk) - LOAD_OFFSET) {
- . = ALIGN(PAGE_SIZE);
- __brk_base = . ;
- . += 64 * 1024 ; /* 64k alignment slop space */
- *(.brk_reservation) /* areas brk users have reserved */
- __brk_limit = . ;
- }
-
- .end : AT(ADDR(.end) - LOAD_OFFSET) {
- _end = . ;
- }
-
- /* Sections to be discarded */
- /DISCARD/ : {
- *(.exitcall.exit)
- *(.discard)
- }
-
- STABS_DEBUG
-
- DWARF_DEBUG
-}
-
-/*
- * Build-time check on the image size:
- */
-ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE),
- "kernel image bigger than KERNEL_IMAGE_SIZE")
-
-#ifdef CONFIG_KEXEC
-/* Link time checks */
-#include <asm/kexec.h>
-
-ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
- "kexec control code size is too big")
-#endif
+++ /dev/null
-/* ld script to make x86-64 Linux kernel
- * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
- */
-
-#define LOAD_OFFSET __START_KERNEL_map
-
-#include <asm-generic/vmlinux.lds.h>
-#include <asm/asm-offsets.h>
-#include <asm/page_types.h>
-
-#undef i386 /* in case the preprocessor is a 32bit one */
-
-OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
-OUTPUT_ARCH(i386:x86-64)
-ENTRY(phys_startup_64)
-jiffies_64 = jiffies;
-PHDRS {
- text PT_LOAD FLAGS(5); /* R_E */
- data PT_LOAD FLAGS(7); /* RWE */
- user PT_LOAD FLAGS(7); /* RWE */
- data.init PT_LOAD FLAGS(7); /* RWE */
-#ifdef CONFIG_SMP
- percpu PT_LOAD FLAGS(7); /* RWE */
-#endif
- data.init2 PT_LOAD FLAGS(7); /* RWE */
- note PT_NOTE FLAGS(0); /* ___ */
-}
-SECTIONS
-{
- . = __START_KERNEL;
- phys_startup_64 = startup_64 - LOAD_OFFSET;
- .text : AT(ADDR(.text) - LOAD_OFFSET) {
- _text = .; /* Text and read-only data */
- /* First the code that has to be first for bootstrapping */
- *(.text.head)
- _stext = .;
- /* Then the rest */
- TEXT_TEXT
- SCHED_TEXT
- LOCK_TEXT
- KPROBES_TEXT
- IRQENTRY_TEXT
- *(.fixup)
- *(.gnu.warning)
- _etext = .; /* End of text section */
- } :text = 0x9090
-
- NOTES :text :note
-
- . = ALIGN(16); /* Exception table */
- __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
- __start___ex_table = .;
- *(__ex_table)
- __stop___ex_table = .;
- } :text = 0x9090
-
- RODATA
-
- . = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
- /* Data */
- .data : AT(ADDR(.data) - LOAD_OFFSET) {
- DATA_DATA
- CONSTRUCTORS
- _edata = .; /* End of data section */
- } :data
-
-
- .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
- . = ALIGN(PAGE_SIZE);
- . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
- *(.data.cacheline_aligned)
- }
- . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
- .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
- *(.data.read_mostly)
- }
-
-#define VSYSCALL_ADDR (-10*1024*1024)
-#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
-#define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
-
-#define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
-#define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
-
-#define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
-#define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
-
- . = VSYSCALL_ADDR;
- .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) } :user
- __vsyscall_0 = VSYSCALL_VIRT_ADDR;
-
- . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
- .vsyscall_fn : AT(VLOAD(.vsyscall_fn)) { *(.vsyscall_fn) }
- . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
- .vsyscall_gtod_data : AT(VLOAD(.vsyscall_gtod_data))
- { *(.vsyscall_gtod_data) }
- vsyscall_gtod_data = VVIRT(.vsyscall_gtod_data);
- .vsyscall_clock : AT(VLOAD(.vsyscall_clock))
- { *(.vsyscall_clock) }
- vsyscall_clock = VVIRT(.vsyscall_clock);
-
-
- .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1))
- { *(.vsyscall_1) }
- .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2))
- { *(.vsyscall_2) }
-
- .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
- vgetcpu_mode = VVIRT(.vgetcpu_mode);
-
- . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
- .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
- jiffies = VVIRT(.jiffies);
-
- .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3))
- { *(.vsyscall_3) }
-
- . = VSYSCALL_VIRT_ADDR + PAGE_SIZE;
-
-#undef VSYSCALL_ADDR
-#undef VSYSCALL_PHYS_ADDR
-#undef VSYSCALL_VIRT_ADDR
-#undef VLOAD_OFFSET
-#undef VLOAD
-#undef VVIRT_OFFSET
-#undef VVIRT
-
- .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
- . = ALIGN(THREAD_SIZE); /* init_task */
- *(.data.init_task)
- }:data.init
-
- .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
- . = ALIGN(PAGE_SIZE);
- *(.data.page_aligned)
- }
-
- .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
- /* might get freed after init */
- . = ALIGN(PAGE_SIZE);
- __smp_alt_begin = .;
- __smp_locks = .;
- *(.smp_locks)
- __smp_locks_end = .;
- . = ALIGN(PAGE_SIZE);
- __smp_alt_end = .;
- }
-
- . = ALIGN(PAGE_SIZE); /* Init code and data */
- __init_begin = .; /* paired with __init_end */
- .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
- _sinittext = .;
- INIT_TEXT
- _einittext = .;
- }
- .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
- __initdata_begin = .;
- INIT_DATA
- __initdata_end = .;
- }
-
- .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
- . = ALIGN(16);
- __setup_start = .;
- *(.init.setup)
- __setup_end = .;
- }
- .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
- __initcall_start = .;
- INITCALLS
- __initcall_end = .;
- }
- .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
- __con_initcall_start = .;
- *(.con_initcall.init)
- __con_initcall_end = .;
- }
- .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
- __x86_cpu_dev_start = .;
- *(.x86_cpu_dev.init)
- __x86_cpu_dev_end = .;
- }
- SECURITY_INIT
-
- . = ALIGN(8);
- .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
- __parainstructions = .;
- *(.parainstructions)
- __parainstructions_end = .;
- }
-
- .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
- . = ALIGN(8);
- __alt_instructions = .;
- *(.altinstructions)
- __alt_instructions_end = .;
- }
- .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
- *(.altinstr_replacement)
- }
- /* .exit.text is discard at runtime, not link time, to deal with references
- from .altinstructions and .eh_frame */
- .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
- EXIT_TEXT
- }
- .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
- EXIT_DATA
- }
-
-#ifdef CONFIG_BLK_DEV_INITRD
- . = ALIGN(PAGE_SIZE);
- .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
- __initramfs_start = .;
- *(.init.ramfs)
- __initramfs_end = .;
- }
-#endif
-
-#ifdef CONFIG_SMP
- /*
- * percpu offsets are zero-based on SMP. PERCPU_VADDR() changes the
- * output PHDR, so the next output section - __data_nosave - should
- * start another section data.init2. Also, pda should be at the head of
- * percpu area. Preallocate it and define the percpu offset symbol
- * so that it can be accessed as a percpu variable.
- */
- . = ALIGN(PAGE_SIZE);
- PERCPU_VADDR(0, :percpu)
-#else
- PERCPU(PAGE_SIZE)
-#endif
-
- . = ALIGN(PAGE_SIZE);
- __init_end = .;
-
- .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
- . = ALIGN(PAGE_SIZE);
- __nosave_begin = .;
- *(.data.nosave)
- . = ALIGN(PAGE_SIZE);
- __nosave_end = .;
- } :data.init2 /* use another section data.init2, see PERCPU_VADDR() above */
-
- .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
- . = ALIGN(PAGE_SIZE);
- __bss_start = .; /* BSS */
- *(.bss.page_aligned)
- *(.bss)
- __bss_stop = .;
- }
-
- .brk : AT(ADDR(.brk) - LOAD_OFFSET) {
- . = ALIGN(PAGE_SIZE);
- __brk_base = . ;
- . += 64 * 1024 ; /* 64k alignment slop space */
- *(.brk_reservation) /* areas brk users have reserved */
- __brk_limit = . ;
- }
-
- _end = . ;
-
- /* Sections to be discarded */
- /DISCARD/ : {
- *(.exitcall.exit)
- *(.eh_frame)
- *(.discard)
- }
-
- STABS_DEBUG
-
- DWARF_DEBUG
-}
-
- /*
- * Per-cpu symbols which need to be offset from __per_cpu_load
- * for the boot processor.
- */
-#define INIT_PER_CPU(x) init_per_cpu__##x = per_cpu__##x + __per_cpu_load
-INIT_PER_CPU(gdt_page);
-INIT_PER_CPU(irq_stack_union);
-
-/*
- * Build-time check on the image size:
- */
-ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
- "kernel image bigger than KERNEL_IMAGE_SIZE")
-
-#ifdef CONFIG_SMP
-ASSERT((per_cpu__irq_stack_union == 0),
- "irq_stack_union is not at start of per-cpu area");
-#endif
-
-#ifdef CONFIG_KEXEC
-#include <asm/kexec.h>
-
-ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
- "kexec control code size is too big")
-#endif
return;
}
- /*
- * Surround the RDTSC by barriers, to make sure it's not
- * speculated to outside the seqlock critical section and
- * does not cause time warps:
- */
- rdtsc_barrier();
now = vread();
- rdtsc_barrier();
-
base = __vsyscall_gtod_data.clock.cycle_last;
mask = __vsyscall_gtod_data.clock.mask;
mult = __vsyscall_gtod_data.clock.mult;
/* When lazy mode is turned off reset the per-cpu lazy mode variable and then
* issue the do-nothing hypercall to flush any stored calls. */
-static void lguest_leave_lazy_mode(void)
+static void lguest_leave_lazy_mmu_mode(void)
{
- paravirt_leave_lazy(paravirt_get_lazy_mode());
kvm_hypercall0(LHCALL_FLUSH_ASYNC);
+ paravirt_leave_lazy_mmu();
+}
+
+static void lguest_end_context_switch(struct task_struct *next)
+{
+ kvm_hypercall0(LHCALL_FLUSH_ASYNC);
+ paravirt_end_context_switch(next);
}
/*G:033
void lguest_setup_irq(unsigned int irq)
{
- irq_to_desc_alloc_cpu(irq, 0);
+ irq_to_desc_alloc_node(irq, 0);
set_irq_chip_and_handler_name(irq, &lguest_irq_controller,
handle_level_irq, "level");
}
pv_cpu_ops.write_gdt_entry = lguest_write_gdt_entry;
pv_cpu_ops.write_idt_entry = lguest_write_idt_entry;
pv_cpu_ops.wbinvd = lguest_wbinvd;
- pv_cpu_ops.lazy_mode.enter = paravirt_enter_lazy_cpu;
- pv_cpu_ops.lazy_mode.leave = lguest_leave_lazy_mode;
+ pv_cpu_ops.start_context_switch = paravirt_start_context_switch;
+ pv_cpu_ops.end_context_switch = lguest_end_context_switch;
/* pagetable management */
pv_mmu_ops.write_cr3 = lguest_write_cr3;
pv_mmu_ops.read_cr2 = lguest_read_cr2;
pv_mmu_ops.read_cr3 = lguest_read_cr3;
pv_mmu_ops.lazy_mode.enter = paravirt_enter_lazy_mmu;
- pv_mmu_ops.lazy_mode.leave = lguest_leave_lazy_mode;
+ pv_mmu_ops.lazy_mode.leave = lguest_leave_lazy_mmu_mode;
pv_mmu_ops.pte_update = lguest_pte_update;
pv_mmu_ops.pte_update_defer = lguest_pte_update;
st->current_address >= st->marker[1].start_address) {
const char *unit = units;
unsigned long delta;
+ int width = sizeof(unsigned long) * 2;
/*
* Now print the actual finished series
*/
- seq_printf(m, "0x%p-0x%p ",
- (void *)st->start_address,
- (void *)st->current_address);
+ seq_printf(m, "0x%0*lx-0x%0*lx ",
+ width, st->start_address,
+ width, st->current_address);
delta = (st->current_address - st->start_address) >> 10;
while (!(delta & 1023) && unit[1]) {
* Copyright (C) 2001, 2002 Andi Kleen, SuSE Labs.
* Copyright (C) 2008-2009, Red Hat Inc., Ingo Molnar
*/
-#include <linux/interrupt.h>
-#include <linux/mmiotrace.h>
-#include <linux/bootmem.h>
-#include <linux/compiler.h>
-#include <linux/highmem.h>
-#include <linux/kprobes.h>
-#include <linux/uaccess.h>
-#include <linux/vmalloc.h>
-#include <linux/vt_kern.h>
-#include <linux/signal.h>
-#include <linux/kernel.h>
-#include <linux/ptrace.h>
-#include <linux/string.h>
-#include <linux/module.h>
-#include <linux/kdebug.h>
-#include <linux/errno.h>
-#include <linux/magic.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/mman.h>
-#include <linux/tty.h>
-#include <linux/smp.h>
-#include <linux/mm.h>
-
-#include <asm-generic/sections.h>
-
-#include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
-#include <asm/segment.h>
-#include <asm/system.h>
-#include <asm/proto.h>
-#include <asm/traps.h>
-#include <asm/desc.h>
+#include <linux/magic.h> /* STACK_END_MAGIC */
+#include <linux/sched.h> /* test_thread_flag(), ... */
+#include <linux/kdebug.h> /* oops_begin/end, ... */
+#include <linux/module.h> /* search_exception_table */
+#include <linux/bootmem.h> /* max_low_pfn */
+#include <linux/kprobes.h> /* __kprobes, ... */
+#include <linux/mmiotrace.h> /* kmmio_handler, ... */
+#include <linux/perf_counter.h> /* perf_swcounter_event */
+
+#include <asm/traps.h> /* dotraplinkage, ... */
+#include <asm/pgalloc.h> /* pgd_*(), ... */
/*
* Page fault error code bits:
if (!pmd_present(*pmd_k))
return NULL;
- if (!pmd_present(*pmd)) {
+ if (!pmd_present(*pmd))
set_pmd(pmd, *pmd_k);
- arch_flush_lazy_mmu_mode();
- } else {
+ else
BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
- }
return pmd_k;
}
static int is_errata93(struct pt_regs *regs, unsigned long address)
{
#ifdef CONFIG_X86_64
- static int once;
-
if (address != regs->ip)
return 0;
address |= 0xffffffffUL << 32;
if ((address >= (u64)_stext && address <= (u64)_etext) ||
(address >= MODULES_VADDR && address <= MODULES_END)) {
- if (!once) {
- printk(errata93_warning);
- once = 1;
- }
+ printk_once(errata93_warning);
regs->ip = address;
return 1;
}
if (unlikely(error_code & PF_RSVD))
pgtable_bad(regs, error_code, address);
+ perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, address);
+
/*
* If we're in an interrupt, have no user context or are running
* in an atomic region then we must not take the fault:
return;
}
- if (fault & VM_FAULT_MAJOR)
+ if (fault & VM_FAULT_MAJOR) {
tsk->maj_flt++;
- else
+ perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0,
+ regs, address);
+ } else {
tsk->min_flt++;
+ perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0,
+ regs, address);
+ }
check_v8086_mode(regs, address, tsk);
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
BUG_ON(!pte_none(*(kmap_pte-idx)));
set_pte(kmap_pte-idx, mk_pte(page, prot));
- arch_flush_lazy_mmu_mode();
return (void *)vaddr;
}
#endif
}
- arch_flush_lazy_mmu_mode();
pagefault_enable();
}
+#include <linux/initrd.h>
#include <linux/ioport.h>
#include <linux/swap.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/tlbflush.h>
+#include <asm/tlb.h>
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long __initdata e820_table_start;
unsigned long __meminitdata e820_table_end;
#endif
;
+int nx_enabled;
+
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
+static int disable_nx __cpuinitdata;
+
+/*
+ * noexec = on|off
+ *
+ * Control non-executable mappings for processes.
+ *
+ * on Enable
+ * off Disable
+ */
+static int __init noexec_setup(char *str)
+{
+ if (!str)
+ return -EINVAL;
+ if (!strncmp(str, "on", 2)) {
+ __supported_pte_mask |= _PAGE_NX;
+ disable_nx = 0;
+ } else if (!strncmp(str, "off", 3)) {
+ disable_nx = 1;
+ __supported_pte_mask &= ~_PAGE_NX;
+ }
+ return 0;
+}
+early_param("noexec", noexec_setup);
+#endif
+
+#ifdef CONFIG_X86_PAE
+static void __init set_nx(void)
+{
+ unsigned int v[4], l, h;
+
+ if (cpu_has_pae && (cpuid_eax(0x80000000) > 0x80000001)) {
+ cpuid(0x80000001, &v[0], &v[1], &v[2], &v[3]);
+
+ if ((v[3] & (1 << 20)) && !disable_nx) {
+ rdmsr(MSR_EFER, l, h);
+ l |= EFER_NX;
+ wrmsr(MSR_EFER, l, h);
+ nx_enabled = 1;
+ __supported_pte_mask |= _PAGE_NX;
+ }
+ }
+}
+#else
+static inline void set_nx(void)
+{
+}
+#endif
+
+#ifdef CONFIG_X86_64
+void __cpuinit check_efer(void)
+{
+ unsigned long efer;
+
+ rdmsrl(MSR_EFER, efer);
+ if (!(efer & EFER_NX) || disable_nx)
+ __supported_pte_mask &= ~_PAGE_NX;
+}
+#endif
+
static void __init find_early_table_space(unsigned long end, int use_pse,
int use_gbpages)
{
*/
#ifdef CONFIG_X86_32
start = 0x7000;
- e820_table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
- tables, PAGE_SIZE);
-#else /* CONFIG_X86_64 */
+#else
start = 0x8000;
- e820_table_start = find_e820_area(start, end, tables, PAGE_SIZE);
#endif
+ e820_table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
+ tables, PAGE_SIZE);
if (e820_table_start == -1UL)
panic("Cannot find space for the kernel page tables");
use_gbpages = direct_gbpages;
#endif
-#ifdef CONFIG_X86_32
-#ifdef CONFIG_X86_PAE
set_nx();
if (nx_enabled)
printk(KERN_INFO "NX (Execute Disable) protection: active\n");
-#endif
/* Enable PSE if available */
if (cpu_has_pse)
set_in_cr4(X86_CR4_PGE);
__supported_pte_mask |= _PAGE_GLOBAL;
}
-#endif
if (use_gbpages)
page_size_mask |= 1 << PG_LEVEL_1G;
#include <asm/paravirt.h>
#include <asm/setup.h>
#include <asm/cacheflush.h>
+#include <asm/page_types.h>
#include <asm/init.h>
-unsigned long max_low_pfn_mapped;
-unsigned long max_pfn_mapped;
-
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long highstart_pfn, highend_pfn;
static noinline int do_test_wp_bit(void);
flush_tlb_all();
}
-int nx_enabled;
-
pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL | _PAGE_IOMAP);
EXPORT_SYMBOL_GPL(__supported_pte_mask);
-#ifdef CONFIG_X86_PAE
-
-static int disable_nx __initdata;
-
-/*
- * noexec = on|off
- *
- * Control non executable mappings.
- *
- * on Enable
- * off Disable
- */
-static int __init noexec_setup(char *str)
-{
- if (!str || !strcmp(str, "on")) {
- if (cpu_has_nx) {
- __supported_pte_mask |= _PAGE_NX;
- disable_nx = 0;
- }
- } else {
- if (!strcmp(str, "off")) {
- disable_nx = 1;
- __supported_pte_mask &= ~_PAGE_NX;
- } else {
- return -EINVAL;
- }
- }
-
- return 0;
-}
-early_param("noexec", noexec_setup);
-
-void __init set_nx(void)
-{
- unsigned int v[4], l, h;
-
- if (cpu_has_pae && (cpuid_eax(0x80000000) > 0x80000001)) {
- cpuid(0x80000001, &v[0], &v[1], &v[2], &v[3]);
-
- if ((v[3] & (1 << 20)) && !disable_nx) {
- rdmsr(MSR_EFER, l, h);
- l |= EFER_NX;
- wrmsr(MSR_EFER, l, h);
- nx_enabled = 1;
- __supported_pte_mask |= _PAGE_NX;
- }
- }
-}
-#endif
-
/* user-defined highmem size */
static unsigned int highmem_pages = -1;
highstart_pfn = highend_pfn = max_pfn;
if (max_pfn > max_low_pfn)
highstart_pfn = max_low_pfn;
- memory_present(0, 0, highend_pfn);
e820_register_active_regions(0, 0, highend_pfn);
+ sparse_memory_present_with_active_regions(0);
printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
pages_to_mb(highend_pfn - highstart_pfn));
num_physpages = highend_pfn;
high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
#else
- memory_present(0, 0, max_low_pfn);
e820_register_active_regions(0, 0, max_low_pfn);
+ sparse_memory_present_with_active_regions(0);
num_physpages = max_low_pfn;
high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
#endif
#include <asm/cacheflush.h>
#include <asm/init.h>
-/*
- * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
- * The direct mapping extends to max_pfn_mapped, so that we can directly access
- * apertures, ACPI and other tables without having to play with fixmaps.
- */
-unsigned long max_low_pfn_mapped;
-unsigned long max_pfn_mapped;
-
static unsigned long dma_reserve __initdata;
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-
static int __init parse_direct_gbpages_off(char *arg)
{
direct_gbpages = 0;
pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP;
EXPORT_SYMBOL_GPL(__supported_pte_mask);
-static int disable_nx __cpuinitdata;
-
-/*
- * noexec=on|off
- * Control non-executable mappings for 64-bit processes.
- *
- * on Enable (default)
- * off Disable
- */
-static int __init nonx_setup(char *str)
-{
- if (!str)
- return -EINVAL;
- if (!strncmp(str, "on", 2)) {
- __supported_pte_mask |= _PAGE_NX;
- disable_nx = 0;
- } else if (!strncmp(str, "off", 3)) {
- disable_nx = 1;
- __supported_pte_mask &= ~_PAGE_NX;
- }
- return 0;
-}
-early_param("noexec", nonx_setup);
-
-void __cpuinit check_efer(void)
-{
- unsigned long efer;
-
- rdmsrl(MSR_EFER, efer);
- if (!(efer & EFER_NX) || disable_nx)
- __supported_pte_mask &= ~_PAGE_NX;
-}
-
int force_personality32;
/*
early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
}
+#endif
void __init paging_init(void)
{
max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
max_zone_pfns[ZONE_NORMAL] = max_pfn;
- memory_present(0, 0, max_pfn);
+ sparse_memory_present_with_active_regions(MAX_NUMNODES);
sparse_init();
free_area_init_nodes(max_zone_pfns);
}
-#endif
/*
* Memory hotplug specific functions
if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx))
kpte_clear_flush(kmap_pte-idx, vaddr);
- arch_flush_lazy_mmu_mode();
pagefault_enable();
}
EXPORT_SYMBOL_GPL(iounmap_atomic);
struct list_head list;
struct kmmio_fault_page *release_next;
unsigned long page; /* location of the fault page */
- bool old_presence; /* page presence prior to arming */
+ pteval_t old_presence; /* page presence prior to arming */
bool armed;
/*
static struct kmmio_fault_page *get_kmmio_fault_page(unsigned long page)
{
struct list_head *head;
- struct kmmio_fault_page *p;
+ struct kmmio_fault_page *f;
page &= PAGE_MASK;
head = kmmio_page_list(page);
- list_for_each_entry_rcu(p, head, list) {
- if (p->page == page)
- return p;
+ list_for_each_entry_rcu(f, head, list) {
+ if (f->page == page)
+ return f;
}
return NULL;
}
-static void set_pmd_presence(pmd_t *pmd, bool present, bool *old)
+static void clear_pmd_presence(pmd_t *pmd, bool clear, pmdval_t *old)
{
pmdval_t v = pmd_val(*pmd);
- *old = !!(v & _PAGE_PRESENT);
- v &= ~_PAGE_PRESENT;
- if (present)
- v |= _PAGE_PRESENT;
+ if (clear) {
+ *old = v & _PAGE_PRESENT;
+ v &= ~_PAGE_PRESENT;
+ } else /* presume this has been called with clear==true previously */
+ v |= *old;
set_pmd(pmd, __pmd(v));
}
-static void set_pte_presence(pte_t *pte, bool present, bool *old)
+static void clear_pte_presence(pte_t *pte, bool clear, pteval_t *old)
{
pteval_t v = pte_val(*pte);
- *old = !!(v & _PAGE_PRESENT);
- v &= ~_PAGE_PRESENT;
- if (present)
- v |= _PAGE_PRESENT;
+ if (clear) {
+ *old = v & _PAGE_PRESENT;
+ v &= ~_PAGE_PRESENT;
+ } else /* presume this has been called with clear==true previously */
+ v |= *old;
set_pte_atomic(pte, __pte(v));
}
-static int set_page_presence(unsigned long addr, bool present, bool *old)
+static int clear_page_presence(struct kmmio_fault_page *f, bool clear)
{
unsigned int level;
- pte_t *pte = lookup_address(addr, &level);
+ pte_t *pte = lookup_address(f->page, &level);
if (!pte) {
- pr_err("kmmio: no pte for page 0x%08lx\n", addr);
+ pr_err("kmmio: no pte for page 0x%08lx\n", f->page);
return -1;
}
switch (level) {
case PG_LEVEL_2M:
- set_pmd_presence((pmd_t *)pte, present, old);
+ clear_pmd_presence((pmd_t *)pte, clear, &f->old_presence);
break;
case PG_LEVEL_4K:
- set_pte_presence(pte, present, old);
+ clear_pte_presence(pte, clear, &f->old_presence);
break;
default:
pr_err("kmmio: unexpected page level 0x%x.\n", level);
return -1;
}
- __flush_tlb_one(addr);
+ __flush_tlb_one(f->page);
return 0;
}
WARN_ONCE(f->armed, KERN_ERR "kmmio page already armed.\n");
if (f->armed) {
pr_warning("kmmio double-arm: page 0x%08lx, ref %d, old %d\n",
- f->page, f->count, f->old_presence);
+ f->page, f->count, !!f->old_presence);
}
- ret = set_page_presence(f->page, false, &f->old_presence);
+ ret = clear_page_presence(f, true);
WARN_ONCE(ret < 0, KERN_ERR "kmmio arming 0x%08lx failed.\n", f->page);
f->armed = true;
return ret;
/** Restore the given page to saved presence state. */
static void disarm_kmmio_fault_page(struct kmmio_fault_page *f)
{
- bool tmp;
- int ret = set_page_presence(f->page, f->old_presence, &tmp);
+ int ret = clear_page_presence(f, false);
WARN_ONCE(ret < 0,
KERN_ERR "kmmio disarming 0x%08lx failed.\n", f->page);
f->armed = false;
struct kmmio_context *ctx = &get_cpu_var(kmmio_ctx);
if (!ctx->active) {
- pr_debug("kmmio: spurious debug trap on CPU %d.\n",
+ /*
+ * debug traps without an active context are due to either
+ * something external causing them (f.e. using a debugger while
+ * mmio tracing enabled), or erroneous behaviour
+ */
+ pr_warning("kmmio: unexpected debug trap on CPU %d.\n",
smp_processor_id());
goto out;
}
head,
struct kmmio_delayed_release,
rcu);
- struct kmmio_fault_page *p = dr->release_list;
- while (p) {
- struct kmmio_fault_page *next = p->release_next;
- BUG_ON(p->count);
- kfree(p);
- p = next;
+ struct kmmio_fault_page *f = dr->release_list;
+ while (f) {
+ struct kmmio_fault_page *next = f->release_next;
+ BUG_ON(f->count);
+ kfree(f);
+ f = next;
}
kfree(dr);
}
{
struct kmmio_delayed_release *dr =
container_of(head, struct kmmio_delayed_release, rcu);
- struct kmmio_fault_page *p = dr->release_list;
+ struct kmmio_fault_page *f = dr->release_list;
struct kmmio_fault_page **prevp = &dr->release_list;
unsigned long flags;
spin_lock_irqsave(&kmmio_lock, flags);
- while (p) {
- if (!p->count) {
- list_del_rcu(&p->list);
- prevp = &p->release_next;
+ while (f) {
+ if (!f->count) {
+ list_del_rcu(&f->list);
+ prevp = &f->release_next;
} else {
- *prevp = p->release_next;
+ *prevp = f->release_next;
}
- p = p->release_next;
+ f = f->release_next;
}
spin_unlock_irqrestore(&kmmio_lock, flags);
}
EXPORT_SYMBOL(unregister_kmmio_probe);
-static int kmmio_die_notifier(struct notifier_block *nb, unsigned long val,
- void *args)
+static int
+kmmio_die_notifier(struct notifier_block *nb, unsigned long val, void *args)
{
struct die_args *arg = args;
.notifier_call = kmmio_die_notifier
};
-static int __init init_kmmio(void)
+int kmmio_init(void)
{
int i;
+
for (i = 0; i < KMMIO_PAGE_TABLE_SIZE; i++)
INIT_LIST_HEAD(&kmmio_page_table[i]);
+
return register_die_notifier(&nb_die);
}
-fs_initcall(init_kmmio); /* should be before device_initcall() */
+
+void kmmio_cleanup(void)
+{
+ int i;
+
+ unregister_die_notifier(&nb_die);
+ for (i = 0; i < KMMIO_PAGE_TABLE_SIZE; i++) {
+ WARN_ONCE(!list_empty(&kmmio_page_table[i]),
+ KERN_ERR "kmmio_page_table not empty at cleanup, any further tracing will leak memory.\n");
+ }
+}
static void __init memtest(u64 pattern, u64 start_phys, u64 size)
{
- u64 i, count;
- u64 *start;
+ u64 *p;
+ void *start, *end;
u64 start_bad, last_bad;
u64 start_phys_aligned;
size_t incr;
incr = sizeof(pattern);
start_phys_aligned = ALIGN(start_phys, incr);
- count = (size - (start_phys_aligned - start_phys))/incr;
start = __va(start_phys_aligned);
+ end = start + size - (start_phys_aligned - start_phys);
start_bad = 0;
last_bad = 0;
- for (i = 0; i < count; i++)
- start[i] = pattern;
- for (i = 0; i < count; i++, start++, start_phys_aligned += incr) {
- if (*start == pattern)
+ for (p = start; p < end; p++)
+ *p = pattern;
+ for (p = start; p < end; p++, start_phys_aligned += incr) {
+ if (*p == pattern)
continue;
if (start_phys_aligned == last_bad + incr) {
last_bad += incr;
if (nommiotrace)
pr_info(NAME "MMIO tracing disabled.\n");
+ kmmio_init();
enter_uniprocessor();
spin_lock_irq(&trace_lock);
atomic_inc(&mmiotrace_enabled);
clear_trace_list(); /* guarantees: no more kmmio callbacks */
leave_uniprocessor();
+ kmmio_cleanup();
pr_info(NAME "disabled.\n");
out:
mutex_unlock(&mmiotrace_mutex);
}
/* Initialize bootmem allocator for a node */
-void __init setup_node_bootmem(int nodeid, unsigned long start,
- unsigned long end)
+void __init
+setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
{
unsigned long start_pfn, last_pfn, bootmap_pages, bootmap_size;
+ const int pgdat_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
unsigned long bootmap_start, nodedata_phys;
void *bootmap;
- const int pgdat_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
int nid;
if (!end)
return;
+ /*
+ * Don't confuse VM with a node that doesn't have the
+ * minimum amount of memory:
+ */
+ if (end && (end - start) < NODE_MIN_SIZE)
+ return;
+
start = roundup(start, ZONE_ALIGN);
printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid,
reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start,
bootmap_pages<<PAGE_SHIFT, BOOTMEM_DEFAULT);
-#ifdef CONFIG_ACPI_NUMA
- srat_reserve_add_area(nodeid);
-#endif
node_set_online(nodeid);
}
return pages;
}
-void __init paging_init(void)
-{
- unsigned long max_zone_pfns[MAX_NR_ZONES];
-
- memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
- max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
- max_zone_pfns[ZONE_NORMAL] = max_pfn;
-
- sparse_memory_present_with_active_regions(MAX_NUMNODES);
- sparse_init();
-
- free_area_init_nodes(max_zone_pfns);
-}
-
static __init int numa_setup(char *opt)
{
if (!opt)
#ifdef CONFIG_ACPI_NUMA
if (!strncmp(opt, "noacpi", 6))
acpi_numa = -1;
- if (!strncmp(opt, "hotadd=", 7))
- hotadd_percent = simple_strtoul(opt+7, NULL, 10);
#endif
return 0;
}
vm_unmap_aliases();
- /*
- * If we're called with lazy mmu updates enabled, the
- * in-memory pte state may be stale. Flush pending updates to
- * bring them up to date.
- */
- arch_flush_lazy_mmu_mode();
-
cpa.vaddr = addr;
cpa.pages = pages;
cpa.numpages = numpages;
} else
cpa_flush_all(cache);
- /*
- * If we've been called with lazy mmu updates enabled, then
- * make sure that everything gets flushed out before we
- * return.
- */
- arch_flush_lazy_mmu_mode();
-
out:
return ret;
}
static nodemask_t cpu_nodes_parsed __initdata;
static struct bootnode nodes[MAX_NUMNODES] __initdata;
static struct bootnode nodes_add[MAX_NUMNODES];
-static int found_add_area __initdata;
-int hotadd_percent __initdata = 0;
static int num_node_memblks __initdata;
static struct bootnode node_memblk_range[NR_NODE_MEMBLKS] __initdata;
static int memblk_nodeid[NR_NODE_MEMBLKS] __initdata;
-/* Too small nodes confuse the VM badly. Usually they result
- from BIOS bugs. */
-#define NODE_MIN_SIZE (4*1024*1024)
-
static __init int setup_node(int pxm)
{
return acpi_map_pxm_to_node(pxm);
{
struct bootnode *nd = &nodes[i];
- if (found_add_area)
- return;
-
if (nd->start < start) {
nd->start = start;
if (nd->end < nd->start)
int i;
printk(KERN_ERR "SRAT: SRAT not used.\n");
acpi_numa = -1;
- found_add_area = 0;
for (i = 0; i < MAX_LOCAL_APIC; i++)
apicid_to_node[i] = NUMA_NO_NODE;
for (i = 0; i < MAX_NUMNODES; i++)
pxm, apic_id, node);
}
-static int update_end_of_memory(unsigned long end) {return -1;}
-static int hotadd_enough_memory(struct bootnode *nd) {return 1;}
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
static inline int save_add_info(void) {return 1;}
#else
static inline int save_add_info(void) {return 0;}
#endif
/*
- * Update nodes_add and decide if to include add are in the zone.
- * Both SPARSE and RESERVE need nodes_add information.
- * This code supports one contiguous hot add area per node.
+ * Update nodes_add[]
+ * This code supports one contiguous hot add area per node
*/
-static int __init
-reserve_hotadd(int node, unsigned long start, unsigned long end)
+static void __init
+update_nodes_add(int node, unsigned long start, unsigned long end)
{
unsigned long s_pfn = start >> PAGE_SHIFT;
unsigned long e_pfn = end >> PAGE_SHIFT;
- int ret = 0, changed = 0;
+ int changed = 0;
struct bootnode *nd = &nodes_add[node];
/* I had some trouble with strange memory hotadd regions breaking
mistakes */
if ((signed long)(end - start) < NODE_MIN_SIZE) {
printk(KERN_ERR "SRAT: Hotplug area too small\n");
- return -1;
+ return;
}
/* This check might be a bit too strict, but I'm keeping it for now. */
printk(KERN_ERR
"SRAT: Hotplug area %lu -> %lu has existing memory\n",
s_pfn, e_pfn);
- return -1;
- }
-
- if (!hotadd_enough_memory(&nodes_add[node])) {
- printk(KERN_ERR "SRAT: Hotplug area too large\n");
- return -1;
+ return;
}
/* Looks good */
printk(KERN_ERR "SRAT: Hotplug zone not continuous. Partly ignored\n");
}
- ret = update_end_of_memory(nd->end);
-
if (changed)
- printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n", nd->start, nd->end);
- return ret;
+ printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n",
+ nd->start, nd->end);
}
/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
start, end);
e820_register_active_regions(node, start >> PAGE_SHIFT,
end >> PAGE_SHIFT);
- push_node_boundaries(node, nd->start >> PAGE_SHIFT,
- nd->end >> PAGE_SHIFT);
- if ((ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) &&
- (reserve_hotadd(node, start, end) < 0)) {
- /* Ignore hotadd region. Undo damage */
- printk(KERN_NOTICE "SRAT: Hotplug region ignored\n");
+ if (ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) {
+ update_nodes_add(node, start, end);
+ /* restore nodes[node] */
*nd = oldnode;
if ((nd->start | nd->end) == 0)
node_clear(node, nodes_parsed);
pxmram = 0;
}
- e820ram = max_pfn - absent_pages_in_range(0, max_pfn);
- /* We seem to lose 3 pages somewhere. Allow a bit of slack. */
- if ((long)(e820ram - pxmram) >= 1*1024*1024) {
+ e820ram = max_pfn - (e820_hole_size(0, max_pfn<<PAGE_SHIFT)>>PAGE_SHIFT);
+ /* We seem to lose 3 pages somewhere. Allow 1M of slack. */
+ if ((long)(e820ram - pxmram) >= (1<<(20 - PAGE_SHIFT))) {
printk(KERN_ERR
"SRAT: PXMs only cover %luMB of your %luMB e820 RAM. Not used.\n",
(pxmram << PAGE_SHIFT) >> 20,
return 1;
}
-static void __init unparse_node(int node)
-{
- int i;
- node_clear(node, nodes_parsed);
- node_clear(node, cpu_nodes_parsed);
- for (i = 0; i < MAX_LOCAL_APIC; i++) {
- if (apicid_to_node[i] == node)
- apicid_to_node[i] = NUMA_NO_NODE;
- }
-}
-
void __init acpi_numa_arch_fixup(void) {}
/* Use the information discovered above to actually set up the nodes. */
return -1;
/* First clean up the node list */
- for (i = 0; i < MAX_NUMNODES; i++) {
+ for (i = 0; i < MAX_NUMNODES; i++)
cutoff_node(i, start, end);
- /*
- * don't confuse VM with a node that doesn't have the
- * minimum memory.
- */
- if (nodes[i].end &&
- (nodes[i].end - nodes[i].start) < NODE_MIN_SIZE) {
- unparse_node(i);
- node_set_offline(i);
- }
- }
if (!nodes_cover_memory(nodes)) {
bad_srat();
if (node == NUMA_NO_NODE)
continue;
- if (!node_isset(node, node_possible_map))
+ if (!node_online(node))
numa_clear_node(i);
}
numa_init_array();
}
#endif /* CONFIG_NUMA_EMU */
-void __init srat_reserve_add_area(int nodeid)
-{
- if (found_add_area && nodes_add[nodeid].end) {
- u64 total_mb;
-
- printk(KERN_INFO "SRAT: Reserving hot-add memory space "
- "for node %d at %Lx-%Lx\n",
- nodeid, nodes_add[nodeid].start, nodes_add[nodeid].end);
- total_mb = (nodes_add[nodeid].end - nodes_add[nodeid].start)
- >> PAGE_SHIFT;
- total_mb *= sizeof(struct page);
- total_mb >>= 20;
- printk(KERN_INFO "SRAT: This will cost you %Lu MB of "
- "pre-allocated memory.\n", (unsigned long long)total_mb);
- reserve_bootmem_node(NODE_DATA(nodeid), nodes_add[nodeid].start,
- nodes_add[nodeid].end - nodes_add[nodeid].start,
- BOOTMEM_DEFAULT);
- }
-}
-
int __node_distance(int a, int b)
{
int index;
switch (val) {
case DIE_NMI:
- if (model->check_ctrs(args->regs, &per_cpu(cpu_msrs, cpu)))
- ret = NOTIFY_STOP;
+ case DIE_NMI_IPI:
+ model->check_ctrs(args->regs, &per_cpu(cpu_msrs, cpu));
+ ret = NOTIFY_STOP;
break;
default:
break;
static struct notifier_block profile_exceptions_nb = {
.notifier_call = profile_exceptions_notify,
.next = NULL,
- .priority = 0
+ .priority = 2
};
static int nmi_setup(void)
u64 val;
int i;
+ /*
+ * This can happen if perf counters are in use when
+ * we steal the die notifier NMI.
+ */
+ if (unlikely(!reset_value))
+ goto out;
+
for (i = 0 ; i < num_counters; ++i) {
if (!reset_value[i])
continue;
wrmsrl(msrs->counters[i].addr, -reset_value[i]);
}
+out:
/* Only P6 based Pentium M need to re-unmask the apic vector but it
* doesn't hurt other P6 variant */
apic_write(APIC_LVTPC, apic_read(APIC_LVTPC) & ~APIC_LVT_MASKED);
#define OP_X86_MODEL_H
#include <asm/types.h>
-#include <asm/intel_arch_perfmon.h>
+#include <asm/perf_counter.h>
struct op_msr {
unsigned long addr;
return 0;
}
+ if (io_apic_assign_pci_irqs)
+ return 0;
+
/* Find IRQ routing entry */
if (!pirq_table)
pirq_penalty[dev->irq]++;
}
+ if (io_apic_assign_pci_irqs)
+ return;
+
dev = NULL;
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
if (!pin)
continue;
-#ifdef CONFIG_X86_IO_APIC
- /*
- * Recalculate IRQ numbers if we use the I/O APIC.
- */
- if (io_apic_assign_pci_irqs) {
- int irq;
-
- /*
- * interrupt pins are numbered starting from 1
- */
- irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
- PCI_SLOT(dev->devfn), pin - 1);
- /*
- * Busses behind bridges are typically not listed in the
- * MP-table. In this case we have to look up the IRQ
- * based on the parent bus, parent slot, and pin number.
- * The SMP code detects such bridged busses itself so we
- * should get into this branch reliably.
- */
- if (irq < 0 && dev->bus->parent) {
- /* go back to the bridge */
- struct pci_dev *bridge = dev->bus->self;
- int bus;
-
- pin = pci_swizzle_interrupt_pin(dev, pin);
- bus = bridge->bus->number;
- irq = IO_APIC_get_PCI_irq_vector(bus,
- PCI_SLOT(bridge->devfn), pin - 1);
- if (irq >= 0)
- dev_warn(&dev->dev,
- "using bridge %s INT %c to "
- "get IRQ %d\n",
- pci_name(bridge),
- 'A' + pin - 1, irq);
- }
- if (irq >= 0) {
- dev_info(&dev->dev,
- "PCI->APIC IRQ transform: INT %c "
- "-> IRQ %d\n",
- 'A' + pin - 1, irq);
- dev->irq = irq;
- }
- }
-#endif
/*
* Still no IRQ? Try to lookup one...
*/
pcibios_enable_irq = pirq_enable_irq;
pcibios_fixup_irqs();
+
+ if (io_apic_assign_pci_irqs && pci_routeirq) {
+ struct pci_dev *dev = NULL;
+ /*
+ * PCI IRQ routing is set up by pci_enable_device(), but we
+ * also do it here in case there are still broken drivers that
+ * don't use pci_enable_device().
+ */
+ printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
+ for_each_pci_dev(dev)
+ pirq_enable_irq(dev);
+ }
+
return 0;
}
static int pirq_enable_irq(struct pci_dev *dev)
{
u8 pin;
- struct pci_dev *temp_dev;
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
- if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) {
+ if (pin && !pcibios_lookup_irq(dev, 1)) {
char *msg = "";
+ if (!io_apic_assign_pci_irqs && dev->irq)
+ return 0;
+
if (io_apic_assign_pci_irqs) {
+#ifdef CONFIG_X86_IO_APIC
+ struct pci_dev *temp_dev;
int irq;
+ struct io_apic_irq_attr irq_attr;
- irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin - 1);
+ irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
+ PCI_SLOT(dev->devfn),
+ pin - 1, &irq_attr);
/*
* Busses behind bridges are typically not listed in the MP-table.
* In this case we have to look up the IRQ based on the parent bus,
pin = pci_swizzle_interrupt_pin(dev, pin);
irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
- PCI_SLOT(bridge->devfn), pin - 1);
+ PCI_SLOT(bridge->devfn),
+ pin - 1, &irq_attr);
if (irq >= 0)
dev_warn(&dev->dev, "using bridge %s "
"INT %c to get IRQ %d\n",
}
dev = temp_dev;
if (irq >= 0) {
+ io_apic_set_pci_routing(&dev->dev, irq,
+ &irq_attr);
+ dev->irq = irq;
dev_info(&dev->dev, "PCI->APIC IRQ transform: "
"INT %c -> IRQ %d\n", 'A' + pin - 1, irq);
- dev->irq = irq;
return 0;
} else
msg = "; probably buggy MP table";
+#endif
} else if (pci_probe & PCI_BIOS_IRQ_SCAN)
msg = "";
else
}
}
+ current->mm->context.vdso = (void *)addr;
+
if (compat_uses_vma || !compat) {
/*
* MAYWRITE to allow gdb to COW and set breakpoints
goto up_fail;
}
- current->mm->context.vdso = (void *)addr;
current_thread_info()->sysenter_return =
VDSO32_SYMBOL(addr, SYSENTER_RETURN);
up_fail:
+ if (ret)
+ current->mm->context.vdso = NULL;
+
up_write(&mm->mmap_sem);
return ret;
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/random.h>
+#include <linux/elf.h>
#include <asm/vsyscall.h>
#include <asm/vgtod.h>
#include <asm/proto.h>
goto up_fail;
}
+ current->mm->context.vdso = (void *)addr;
+
ret = install_special_mapping(mm, addr, vdso_size,
VM_READ|VM_EXEC|
VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
VM_ALWAYSDUMP,
vdso_pages);
- if (ret)
+ if (ret) {
+ current->mm->context.vdso = NULL;
goto up_fail;
+ }
- current->mm->context.vdso = (void *)addr;
up_fail:
up_write(&mm->mmap_sem);
return ret;
#include <linux/delay.h>
#include <linux/start_kernel.h>
#include <linux/sched.h>
+#include <linux/kprobes.h>
#include <linux/bootmem.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/processor.h>
#include <asm/proto.h>
#include <asm/msr-index.h>
+#include <asm/traps.h>
#include <asm/setup.h>
#include <asm/desc.h>
#include <asm/pgtable.h>
return HYPERVISOR_get_debugreg(reg);
}
-void xen_leave_lazy(void)
+static void xen_end_context_switch(struct task_struct *next)
{
- paravirt_leave_lazy(paravirt_get_lazy_mode());
xen_mc_flush();
+ paravirt_end_context_switch(next);
}
static unsigned long xen_store_tr(void)
static int cvt_gate_to_trap(int vector, const gate_desc *val,
struct trap_info *info)
{
+ unsigned long addr;
+
if (val->type != GATE_TRAP && val->type != GATE_INTERRUPT)
return 0;
info->vector = vector;
- info->address = gate_offset(*val);
+
+ addr = gate_offset(*val);
+#ifdef CONFIG_X86_64
+ /*
+ * Look for known traps using IST, and substitute them
+ * appropriately. The debugger ones are the only ones we care
+ * about. Xen will handle faults like double_fault and
+ * machine_check, so we should never see them. Warn if
+ * there's an unexpected IST-using fault handler.
+ */
+ if (addr == (unsigned long)debug)
+ addr = (unsigned long)xen_debug;
+ else if (addr == (unsigned long)int3)
+ addr = (unsigned long)xen_int3;
+ else if (addr == (unsigned long)stack_segment)
+ addr = (unsigned long)xen_stack_segment;
+ else if (addr == (unsigned long)double_fault ||
+ addr == (unsigned long)nmi) {
+ /* Don't need to handle these */
+ return 0;
+#ifdef CONFIG_X86_MCE
+ } else if (addr == (unsigned long)machine_check) {
+ return 0;
+#endif
+ } else {
+ /* Some other trap using IST? */
+ if (WARN_ON(val->ist != 0))
+ return 0;
+ }
+#endif /* CONFIG_X86_64 */
+ info->address = addr;
+
info->cs = gate_segment(*val);
info->flags = val->dpl;
/* interrupt gates clear IF */
xen_mc_issue(PARAVIRT_LAZY_CPU);
}
+static DEFINE_PER_CPU(unsigned long, xen_cr0_value);
+
+static unsigned long xen_read_cr0(void)
+{
+ unsigned long cr0 = percpu_read(xen_cr0_value);
+
+ if (unlikely(cr0 == 0)) {
+ cr0 = native_read_cr0();
+ percpu_write(xen_cr0_value, cr0);
+ }
+
+ return cr0;
+}
+
static void xen_write_cr0(unsigned long cr0)
{
struct multicall_space mcs;
+ percpu_write(xen_cr0_value, cr0);
+
/* Only pay attention to cr0.TS; everything else is
ignored. */
mcs = xen_mc_entry(0);
.clts = xen_clts,
- .read_cr0 = native_read_cr0,
+ .read_cr0 = xen_read_cr0,
.write_cr0 = xen_write_cr0,
.read_cr4 = native_read_cr4,
/* Xen takes care of %gs when switching to usermode for us */
.swapgs = paravirt_nop,
- .lazy_mode = {
- .enter = paravirt_enter_lazy_cpu,
- .leave = xen_leave_lazy,
- },
+ .start_context_switch = paravirt_start_context_switch,
+ .end_context_switch = xen_end_context_switch,
};
static const struct pv_apic_ops xen_apic_ops __initdata = {
void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pteval)
{
- /* updates to init_mm may be done without lock */
- if (mm == &init_mm)
- preempt_disable();
-
ADD_STATS(set_pte_at, 1);
// ADD_STATS(set_pte_at_pinned, xen_page_pinned(ptep));
ADD_STATS(set_pte_at_current, mm == current->mm);
}
xen_set_pte(ptep, pteval);
-out:
- if (mm == &init_mm)
- preempt_enable();
+out: return;
}
pte_t xen_ptep_modify_prot_start(struct mm_struct *mm,
/* If this cpu still has a stale cr3 reference, then make sure
it has been flushed. */
- if (percpu_read(xen_current_cr3) == __pa(mm->pgd)) {
+ if (percpu_read(xen_current_cr3) == __pa(mm->pgd))
load_cr3(swapper_pg_dir);
- arch_flush_lazy_cpu_mode();
- }
}
static void xen_drop_mm_ref(struct mm_struct *mm)
load_cr3(swapper_pg_dir);
else
leave_mm(smp_processor_id());
- arch_flush_lazy_cpu_mode();
}
/* Get the "official" set of cpus referring to our pagetable. */
xen_mark_init_mm_pinned();
}
+static void xen_leave_lazy_mmu(void)
+{
+ preempt_disable();
+ xen_mc_flush();
+ paravirt_leave_lazy_mmu();
+ preempt_enable();
+}
+
const struct pv_mmu_ops xen_mmu_ops __initdata = {
.pagetable_setup_start = xen_pagetable_setup_start,
.pagetable_setup_done = xen_pagetable_setup_done,
.lazy_mode = {
.enter = paravirt_enter_lazy_mmu,
- .leave = xen_leave_lazy,
+ .leave = xen_leave_lazy_mmu,
},
.set_fixmap = xen_set_fixmap,
* - xen_start_info
* See comment above "struct start_info" in <xen/interface/xen.h>
*/
- e820_add_region(__pa(xen_start_info->mfn_list),
- xen_start_info->pt_base - xen_start_info->mfn_list,
- E820_RESERVED);
+ reserve_early(__pa(xen_start_info->mfn_list),
+ __pa(xen_start_info->pt_base),
+ "XEN START INFO");
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
void xen_ident_map_ISA(void);
void xen_reserve_top(void);
-void xen_leave_lazy(void);
void xen_post_allocator_init(void);
char * __init xen_memory_setup(void);
#include <linux/task_io_accounting_ops.h>
#include <linux/blktrace_api.h>
#include <linux/fault-inject.h>
-#include <trace/block.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/block.h>
#include "blk.h"
-DEFINE_TRACE(block_plug);
-DEFINE_TRACE(block_unplug_io);
-DEFINE_TRACE(block_unplug_timer);
-DEFINE_TRACE(block_getrq);
-DEFINE_TRACE(block_sleeprq);
-DEFINE_TRACE(block_rq_requeue);
-DEFINE_TRACE(block_bio_backmerge);
-DEFINE_TRACE(block_bio_frontmerge);
-DEFINE_TRACE(block_bio_queue);
-DEFINE_TRACE(block_rq_complete);
-DEFINE_TRACE(block_remap); /* Also used in drivers/md/dm.c */
EXPORT_TRACEPOINT_SYMBOL_GPL(block_remap);
+EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_complete);
static int __make_request(struct request_queue *q, struct bio *bio);
bio->bi_bdev = bdev->bd_contains;
trace_block_remap(bdev_get_queue(bio->bi_bdev), bio,
- bdev->bd_dev, bio->bi_sector,
+ bdev->bd_dev,
bio->bi_sector - p->start_sect);
}
}
goto end_io;
if (old_sector != -1)
- trace_block_remap(q, bio, old_dev, bio->bi_sector,
- old_sector);
+ trace_block_remap(q, bio, old_dev, old_sector);
trace_block_bio_queue(q, bio);
int blk_register_queue(struct gendisk *disk)
{
int ret;
+ struct device *dev = disk_to_dev(disk);
struct request_queue *q = disk->queue;
if (WARN_ON(!q))
return -ENXIO;
+ ret = blk_trace_init_sysfs(dev);
+ if (ret)
+ return ret;
+
if (!q->request_fn)
return 0;
- ret = kobject_add(&q->kobj, kobject_get(&disk_to_dev(disk)->kobj),
+ ret = kobject_add(&q->kobj, kobject_get(&dev->kobj),
"%s", "queue");
if (ret < 0)
return ret;
memcpy(&buts.name, &cbuts.name, 32);
mutex_lock(&bdev->bd_mutex);
- ret = do_blk_trace_setup(q, b, bdev->bd_dev, &buts);
+ ret = do_blk_trace_setup(q, b, bdev->bd_dev, bdev, &buts);
mutex_unlock(&bdev->bd_mutex);
if (ret)
return ret;
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/blktrace_api.h>
-#include <trace/block.h>
#include <linux/hash.h>
#include <linux/uaccess.h>
+#include <trace/events/block.h>
+
#include "blk.h"
static DEFINE_SPINLOCK(elv_list_lock);
static LIST_HEAD(elv_list);
-DEFINE_TRACE(block_rq_abort);
-
/*
* Merge hash stuff.
*/
#define rq_hash_key(rq) ((rq)->sector + (rq)->nr_sectors)
#define ELV_ON_HASH(rq) (!hlist_unhashed(&(rq)->hash))
-DEFINE_TRACE(block_rq_insert);
-DEFINE_TRACE(block_rq_issue);
-
/*
* Query io scheduler to see if the current process issuing bio may be
* merged with rq.
/* Interrupt Line values above 0xF are forbidden */
if (dev->irq > 0 && (dev->irq <= 0xF)) {
printk(" - using IRQ %d\n", dev->irq);
- acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE,
+ acpi_register_gsi(&dev->dev, dev->irq,
+ ACPI_LEVEL_SENSITIVE,
ACPI_ACTIVE_LOW);
return 0;
} else {
}
}
- rc = acpi_register_gsi(gsi, triggering, polarity);
+ rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
if (rc < 0) {
dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n",
pin_name(pin));
break;
}
- gsi = acpi_register_gsi(irq, ACPI_LEVEL_SENSITIVE,
+ gsi = acpi_register_gsi(NULL, irq, ACPI_LEVEL_SENSITIVE,
ACPI_ACTIVE_LOW);
if (gsi > 0)
break;
irqp = &res->data.extended_irq;
for (i = 0; i < irqp->interrupt_count; i++) {
- irq = acpi_register_gsi(irqp->interrupts[i],
+ irq = acpi_register_gsi(NULL, irqp->interrupts[i],
irqp->triggering, irqp->polarity);
if (irq < 0)
return AE_ERROR;
written += chunk - unwritten;
if (unwritten)
break;
- /* Consider changing this to just 'signal_pending()' with lots of testing */
- if (fatal_signal_pending(current))
- return written ? written : -EINTR;
+ if (signal_pending(current))
+ return written ? written : -ERESTARTSYS;
buf += chunk;
count -= chunk;
cond_resched();
#include <linux/kbd_kern.h>
#include <linux/proc_fs.h>
#include <linux/quotaops.h>
+#include <linux/perf_counter.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/suspend.h>
struct pt_regs *regs = get_irq_regs();
if (regs)
show_regs(regs);
+ perf_counter_print_debug();
}
static struct sysrq_key_op sysrq_showregs_op = {
.handler = sysrq_handle_showregs,
#include <linux/idr.h>
#include <linux/hdreg.h>
#include <linux/blktrace_api.h>
-#include <trace/block.h>
+
+#include <trace/events/block.h>
#define DM_MSG_PREFIX "core"
union map_info info;
};
-DEFINE_TRACE(block_bio_complete);
-
/*
* For request-based dm.
* One of these is allocated per request.
/* the bio has been remapped so dispatch it */
trace_block_remap(bdev_get_queue(clone->bi_bdev), clone,
- tio->io->bio->bi_bdev->bd_dev,
- clone->bi_sector, sector);
+ tio->io->bio->bi_bdev->bd_dev, sector);
generic_make_request(clone);
} else if (r < 0 || r == DM_MAPIO_REQUEUE) {
}
#ifdef CONFIG_SMP
-static void iosapic_set_affinity_irq(unsigned int irq,
+static int iosapic_set_affinity_irq(unsigned int irq,
const struct cpumask *dest)
{
struct vector_info *vi = iosapic_get_vector(irq);
dest_cpu = cpu_check_affinity(irq, dest);
if (dest_cpu < 0)
- return;
+ return -1;
cpumask_copy(irq_desc[irq].affinity, cpumask_of(dest_cpu));
vi->txn_addr = txn_affinity_addr(irq, dest_cpu);
iosapic_set_irt_data(vi, &dummy_d0, &d1);
iosapic_wr_irt_entry(vi, d0, d1);
spin_unlock_irqrestore(&iosapic_lock, flags);
+
+ return 0;
}
#endif
return -1;
}
for (loop = 0; loop < len; loop++) {
- if ((*cur_slot)->number == rtable->slots[loop].slot) {
- if ((*cur_slot)->bus == rtable->slots[loop].bus) {
+ if ((*cur_slot)->number == rtable->slots[loop].slot &&
+ (*cur_slot)->bus == rtable->slots[loop].bus) {
+ struct io_apic_irq_attr irq_attr;
+
(*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
for (i = 0; i < 4; i++)
(*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
- (int) (*cur_slot)->device, i);
-
- debug("(*cur_slot)->irq[0] = %x\n",
- (*cur_slot)->irq[0]);
- debug("(*cur_slot)->irq[1] = %x\n",
- (*cur_slot)->irq[1]);
- debug("(*cur_slot)->irq[2] = %x\n",
- (*cur_slot)->irq[2]);
- debug("(*cur_slot)->irq[3] = %x\n",
- (*cur_slot)->irq[3]);
-
- debug("rtable->exlusive_irqs = %x\n",
+ (int) (*cur_slot)->device, i,
+ &irq_attr);
+
+ debug("(*cur_slot)->irq[0] = %x\n",
+ (*cur_slot)->irq[0]);
+ debug("(*cur_slot)->irq[1] = %x\n",
+ (*cur_slot)->irq[1]);
+ debug("(*cur_slot)->irq[2] = %x\n",
+ (*cur_slot)->irq[2]);
+ debug("(*cur_slot)->irq[3] = %x\n",
+ (*cur_slot)->irq[3]);
+
+ debug("rtable->exlusive_irqs = %x\n",
rtable->exclusive_irqs);
- debug("rtable->slots[loop].irq[0].bitmap = %x\n",
+ debug("rtable->slots[loop].irq[0].bitmap = %x\n",
rtable->slots[loop].irq[0].bitmap);
- debug("rtable->slots[loop].irq[1].bitmap = %x\n",
+ debug("rtable->slots[loop].irq[1].bitmap = %x\n",
rtable->slots[loop].irq[1].bitmap);
- debug("rtable->slots[loop].irq[2].bitmap = %x\n",
+ debug("rtable->slots[loop].irq[2].bitmap = %x\n",
rtable->slots[loop].irq[2].bitmap);
- debug("rtable->slots[loop].irq[3].bitmap = %x\n",
+ debug("rtable->slots[loop].irq[3].bitmap = %x\n",
rtable->slots[loop].irq[3].bitmap);
- debug("rtable->slots[loop].irq[0].link = %x\n",
+ debug("rtable->slots[loop].irq[0].link = %x\n",
rtable->slots[loop].irq[0].link);
- debug("rtable->slots[loop].irq[1].link = %x\n",
+ debug("rtable->slots[loop].irq[1].link = %x\n",
rtable->slots[loop].irq[1].link);
- debug("rtable->slots[loop].irq[2].link = %x\n",
+ debug("rtable->slots[loop].irq[2].link = %x\n",
rtable->slots[loop].irq[2].link);
- debug("rtable->slots[loop].irq[3].link = %x\n",
+ debug("rtable->slots[loop].irq[3].link = %x\n",
rtable->slots[loop].irq[3].link);
- debug("end of init_devno\n");
- kfree(rtable);
- return 0;
- }
+ debug("end of init_devno\n");
+ kfree(rtable);
+ return 0;
}
}
int max_irq;
int pos;
int irq;
+ int node;
pos = pci_find_ht_capability(dev, HT_CAPTYPE_IRQ);
if (!pos)
cfg->msg.address_lo = 0xffffffff;
cfg->msg.address_hi = 0xffffffff;
- irq = create_irq();
+ node = dev_to_node(&dev->dev);
+ irq = create_irq_nr(0, node);
if (irq <= 0) {
kfree(cfg);
}
}
-#ifdef CONFIG_INTR_REMAP
- if (!intr_remapping_enabled) {
- ret = enable_intr_remapping(0);
- if (ret)
- printk(KERN_ERR
- "IOMMU: enable interrupt remapping failed\n");
- }
-#endif
-
/*
* For each rmrr
* for each dev attached to rmrr
static int ir_ioapic_num;
int intr_remapping_enabled;
+static int disable_intremap;
+static __init int setup_nointremap(char *str)
+{
+ disable_intremap = 1;
+ return 0;
+}
+early_param("nointremap", setup_nointremap);
+
struct irq_2_iommu {
struct intel_iommu *iommu;
u16 irte_index;
};
#ifdef CONFIG_GENERIC_HARDIRQS
-static struct irq_2_iommu *get_one_free_irq_2_iommu(int cpu)
+static struct irq_2_iommu *get_one_free_irq_2_iommu(int node)
{
struct irq_2_iommu *iommu;
- int node;
-
- node = cpu_to_node(cpu);
iommu = kzalloc_node(sizeof(*iommu), GFP_ATOMIC, node);
- printk(KERN_DEBUG "alloc irq_2_iommu on cpu %d node %d\n", cpu, node);
+ printk(KERN_DEBUG "alloc irq_2_iommu on node %d\n", node);
return iommu;
}
return desc->irq_2_iommu;
}
-static struct irq_2_iommu *irq_2_iommu_alloc_cpu(unsigned int irq, int cpu)
+static struct irq_2_iommu *irq_2_iommu_alloc_node(unsigned int irq, int node)
{
struct irq_desc *desc;
struct irq_2_iommu *irq_iommu;
/*
* alloc irq desc if not allocated already.
*/
- desc = irq_to_desc_alloc_cpu(irq, cpu);
+ desc = irq_to_desc_alloc_node(irq, node);
if (!desc) {
printk(KERN_INFO "can not get irq_desc for %d\n", irq);
return NULL;
irq_iommu = desc->irq_2_iommu;
if (!irq_iommu)
- desc->irq_2_iommu = get_one_free_irq_2_iommu(cpu);
+ desc->irq_2_iommu = get_one_free_irq_2_iommu(node);
return desc->irq_2_iommu;
}
static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq)
{
- return irq_2_iommu_alloc_cpu(irq, boot_cpu_id);
+ return irq_2_iommu_alloc_node(irq, cpu_to_node(boot_cpu_id));
}
#else /* !CONFIG_SPARSE_IRQ */
readl, (sts & DMA_GSTS_IRTPS), sts);
spin_unlock_irqrestore(&iommu->register_lock, flags);
- if (mode == 0) {
- spin_lock_irqsave(&iommu->register_lock, flags);
-
- /* enable comaptiblity format interrupt pass through */
- cmd = iommu->gcmd | DMA_GCMD_CFI;
- iommu->gcmd |= DMA_GCMD_CFI;
- writel(cmd, iommu->reg + DMAR_GCMD_REG);
-
- IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
- readl, (sts & DMA_GSTS_CFIS), sts);
-
- spin_unlock_irqrestore(&iommu->register_lock, flags);
- }
-
/*
* global invalidation of interrupt entry cache before enabling
* interrupt-remapping.
spin_unlock_irqrestore(&iommu->register_lock, flags);
}
+int __init intr_remapping_supported(void)
+{
+ struct dmar_drhd_unit *drhd;
+
+ if (disable_intremap)
+ return 0;
+
+ for_each_drhd_unit(drhd) {
+ struct intel_iommu *iommu = drhd->iommu;
+
+ if (!ecap_ir_support(iommu->ecap))
+ return 0;
+ }
+
+ return 1;
+}
+
int __init enable_intr_remapping(int eim)
{
struct dmar_drhd_unit *drhd;
}
flags = irq_flags(triggering, polarity, shareable);
- irq = acpi_register_gsi(gsi, triggering, polarity);
+ irq = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
if (irq >= 0)
pcibios_penalize_isa_irq(irq, 1);
else
return blk_trace_setup(sdp->device->request_queue,
sdp->disk->disk_name,
MKDEV(SCSI_GENERIC_MAJOR, sdp->index),
+ NULL,
(char *)arg);
case BLKTRACESTART:
return blk_trace_startstop(sdp->device->request_queue, 1);
secure, but slightly less efficient.
If in doubt, say yes.
+config XEN_DEV_EVTCHN
+ tristate "Xen /dev/xen/evtchn device"
+ depends on XEN
+ default y
+ help
+ The evtchn driver allows a userspace process to triger event
+ channels and to receive notification of an event channel
+ firing.
+ If in doubt, say yes.
+
config XENFS
tristate "Xen filesystem"
depends on XEN
a xen platform.
If in doubt, say yes.
+config XEN_SYS_HYPERVISOR
+ bool "Create xen entries under /sys/hypervisor"
+ depends on XEN && SYSFS
+ select SYS_HYPERVISOR
+ default y
+ help
+ Create entries under /sys/hypervisor describing the Xen
+ hypervisor environment. When running native or in another
+ virtual environment, /sys/hypervisor will still be present,
+ but will have no xen contents.
\ No newline at end of file
obj-$(CONFIG_HOTPLUG_CPU) += cpu_hotplug.o
obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
obj-$(CONFIG_XEN_BALLOON) += balloon.o
-obj-$(CONFIG_XENFS) += xenfs/
\ No newline at end of file
+obj-$(CONFIG_XEN_DEV_EVTCHN) += evtchn.o
+obj-$(CONFIG_XENFS) += xenfs/
+obj-$(CONFIG_XEN_SYS_HYPERVISOR) += sys-hypervisor.o
\ No newline at end of file
return info_for_irq(irq)->evtchn;
}
+unsigned irq_from_evtchn(unsigned int evtchn)
+{
+ return evtchn_to_irq[evtchn];
+}
+EXPORT_SYMBOL_GPL(irq_from_evtchn);
+
static enum ipi_vector ipi_from_irq(unsigned irq)
{
struct irq_info *info = info_for_irq(irq);
if (irq == nr_irqs)
panic("No available IRQ to bind to: increase nr_irqs!\n");
- desc = irq_to_desc_alloc_cpu(irq, 0);
+ desc = irq_to_desc_alloc_node(irq, 0);
if (WARN_ON(desc == NULL))
return -1;
}
/* Rebind an evtchn so that it gets delivered to a specific cpu */
-static void rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
+static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
{
struct evtchn_bind_vcpu bind_vcpu;
int evtchn = evtchn_from_irq(irq);
if (!VALID_EVTCHN(evtchn))
- return;
+ return -1;
/* Send future instances of this interrupt to other vcpu. */
bind_vcpu.port = evtchn;
*/
if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_vcpu, &bind_vcpu) >= 0)
bind_evtchn_to_cpu(evtchn, tcpu);
-}
+ return 0;
+}
-static void set_affinity_irq(unsigned irq, const struct cpumask *dest)
+static int set_affinity_irq(unsigned irq, const struct cpumask *dest)
{
unsigned tcpu = cpumask_first(dest);
- rebind_irq_to_cpu(irq, tcpu);
+
+ return rebind_irq_to_cpu(irq, tcpu);
}
int resend_irq_on_evtchn(unsigned int irq)
--- /dev/null
+/******************************************************************************
+ * evtchn.c
+ *
+ * Driver for receiving and demuxing event-channel signals.
+ *
+ * Copyright (c) 2004-2005, K A Fraser
+ * Multi-process extensions Copyright (c) 2004, Steven Smith
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/major.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/poll.h>
+#include <linux/irq.h>
+#include <linux/init.h>
+#include <linux/gfp.h>
+#include <linux/mutex.h>
+#include <linux/cpu.h>
+#include <xen/events.h>
+#include <xen/evtchn.h>
+#include <asm/xen/hypervisor.h>
+
+struct per_user_data {
+ struct mutex bind_mutex; /* serialize bind/unbind operations */
+
+ /* Notification ring, accessed via /dev/xen/evtchn. */
+#define EVTCHN_RING_SIZE (PAGE_SIZE / sizeof(evtchn_port_t))
+#define EVTCHN_RING_MASK(_i) ((_i)&(EVTCHN_RING_SIZE-1))
+ evtchn_port_t *ring;
+ unsigned int ring_cons, ring_prod, ring_overflow;
+ struct mutex ring_cons_mutex; /* protect against concurrent readers */
+
+ /* Processes wait on this queue when ring is empty. */
+ wait_queue_head_t evtchn_wait;
+ struct fasync_struct *evtchn_async_queue;
+ const char *name;
+};
+
+/* Who's bound to each port? */
+static struct per_user_data *port_user[NR_EVENT_CHANNELS];
+static DEFINE_SPINLOCK(port_user_lock); /* protects port_user[] and ring_prod */
+
+irqreturn_t evtchn_interrupt(int irq, void *data)
+{
+ unsigned int port = (unsigned long)data;
+ struct per_user_data *u;
+
+ spin_lock(&port_user_lock);
+
+ u = port_user[port];
+
+ disable_irq_nosync(irq);
+
+ if ((u->ring_prod - u->ring_cons) < EVTCHN_RING_SIZE) {
+ u->ring[EVTCHN_RING_MASK(u->ring_prod)] = port;
+ wmb(); /* Ensure ring contents visible */
+ if (u->ring_cons == u->ring_prod++) {
+ wake_up_interruptible(&u->evtchn_wait);
+ kill_fasync(&u->evtchn_async_queue,
+ SIGIO, POLL_IN);
+ }
+ } else {
+ u->ring_overflow = 1;
+ }
+
+ spin_unlock(&port_user_lock);
+
+ return IRQ_HANDLED;
+}
+
+static ssize_t evtchn_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ int rc;
+ unsigned int c, p, bytes1 = 0, bytes2 = 0;
+ struct per_user_data *u = file->private_data;
+
+ /* Whole number of ports. */
+ count &= ~(sizeof(evtchn_port_t)-1);
+
+ if (count == 0)
+ return 0;
+
+ if (count > PAGE_SIZE)
+ count = PAGE_SIZE;
+
+ for (;;) {
+ mutex_lock(&u->ring_cons_mutex);
+
+ rc = -EFBIG;
+ if (u->ring_overflow)
+ goto unlock_out;
+
+ c = u->ring_cons;
+ p = u->ring_prod;
+ if (c != p)
+ break;
+
+ mutex_unlock(&u->ring_cons_mutex);
+
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+
+ rc = wait_event_interruptible(u->evtchn_wait,
+ u->ring_cons != u->ring_prod);
+ if (rc)
+ return rc;
+ }
+
+ /* Byte lengths of two chunks. Chunk split (if any) is at ring wrap. */
+ if (((c ^ p) & EVTCHN_RING_SIZE) != 0) {
+ bytes1 = (EVTCHN_RING_SIZE - EVTCHN_RING_MASK(c)) *
+ sizeof(evtchn_port_t);
+ bytes2 = EVTCHN_RING_MASK(p) * sizeof(evtchn_port_t);
+ } else {
+ bytes1 = (p - c) * sizeof(evtchn_port_t);
+ bytes2 = 0;
+ }
+
+ /* Truncate chunks according to caller's maximum byte count. */
+ if (bytes1 > count) {
+ bytes1 = count;
+ bytes2 = 0;
+ } else if ((bytes1 + bytes2) > count) {
+ bytes2 = count - bytes1;
+ }
+
+ rc = -EFAULT;
+ rmb(); /* Ensure that we see the port before we copy it. */
+ if (copy_to_user(buf, &u->ring[EVTCHN_RING_MASK(c)], bytes1) ||
+ ((bytes2 != 0) &&
+ copy_to_user(&buf[bytes1], &u->ring[0], bytes2)))
+ goto unlock_out;
+
+ u->ring_cons += (bytes1 + bytes2) / sizeof(evtchn_port_t);
+ rc = bytes1 + bytes2;
+
+ unlock_out:
+ mutex_unlock(&u->ring_cons_mutex);
+ return rc;
+}
+
+static ssize_t evtchn_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ int rc, i;
+ evtchn_port_t *kbuf = (evtchn_port_t *)__get_free_page(GFP_KERNEL);
+ struct per_user_data *u = file->private_data;
+
+ if (kbuf == NULL)
+ return -ENOMEM;
+
+ /* Whole number of ports. */
+ count &= ~(sizeof(evtchn_port_t)-1);
+
+ rc = 0;
+ if (count == 0)
+ goto out;
+
+ if (count > PAGE_SIZE)
+ count = PAGE_SIZE;
+
+ rc = -EFAULT;
+ if (copy_from_user(kbuf, buf, count) != 0)
+ goto out;
+
+ spin_lock_irq(&port_user_lock);
+ for (i = 0; i < (count/sizeof(evtchn_port_t)); i++)
+ if ((kbuf[i] < NR_EVENT_CHANNELS) && (port_user[kbuf[i]] == u))
+ enable_irq(irq_from_evtchn(kbuf[i]));
+ spin_unlock_irq(&port_user_lock);
+
+ rc = count;
+
+ out:
+ free_page((unsigned long)kbuf);
+ return rc;
+}
+
+static int evtchn_bind_to_user(struct per_user_data *u, int port)
+{
+ int rc = 0;
+
+ /*
+ * Ports are never reused, so every caller should pass in a
+ * unique port.
+ *
+ * (Locking not necessary because we haven't registered the
+ * interrupt handler yet, and our caller has already
+ * serialized bind operations.)
+ */
+ BUG_ON(port_user[port] != NULL);
+ port_user[port] = u;
+
+ rc = bind_evtchn_to_irqhandler(port, evtchn_interrupt, IRQF_DISABLED,
+ u->name, (void *)(unsigned long)port);
+ if (rc >= 0)
+ rc = 0;
+
+ return rc;
+}
+
+static void evtchn_unbind_from_user(struct per_user_data *u, int port)
+{
+ int irq = irq_from_evtchn(port);
+
+ unbind_from_irqhandler(irq, (void *)(unsigned long)port);
+
+ /* make sure we unbind the irq handler before clearing the port */
+ barrier();
+
+ port_user[port] = NULL;
+}
+
+static long evtchn_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int rc;
+ struct per_user_data *u = file->private_data;
+ void __user *uarg = (void __user *) arg;
+
+ /* Prevent bind from racing with unbind */
+ mutex_lock(&u->bind_mutex);
+
+ switch (cmd) {
+ case IOCTL_EVTCHN_BIND_VIRQ: {
+ struct ioctl_evtchn_bind_virq bind;
+ struct evtchn_bind_virq bind_virq;
+
+ rc = -EFAULT;
+ if (copy_from_user(&bind, uarg, sizeof(bind)))
+ break;
+
+ bind_virq.virq = bind.virq;
+ bind_virq.vcpu = 0;
+ rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
+ &bind_virq);
+ if (rc != 0)
+ break;
+
+ rc = evtchn_bind_to_user(u, bind_virq.port);
+ if (rc == 0)
+ rc = bind_virq.port;
+ break;
+ }
+
+ case IOCTL_EVTCHN_BIND_INTERDOMAIN: {
+ struct ioctl_evtchn_bind_interdomain bind;
+ struct evtchn_bind_interdomain bind_interdomain;
+
+ rc = -EFAULT;
+ if (copy_from_user(&bind, uarg, sizeof(bind)))
+ break;
+
+ bind_interdomain.remote_dom = bind.remote_domain;
+ bind_interdomain.remote_port = bind.remote_port;
+ rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,
+ &bind_interdomain);
+ if (rc != 0)
+ break;
+
+ rc = evtchn_bind_to_user(u, bind_interdomain.local_port);
+ if (rc == 0)
+ rc = bind_interdomain.local_port;
+ break;
+ }
+
+ case IOCTL_EVTCHN_BIND_UNBOUND_PORT: {
+ struct ioctl_evtchn_bind_unbound_port bind;
+ struct evtchn_alloc_unbound alloc_unbound;
+
+ rc = -EFAULT;
+ if (copy_from_user(&bind, uarg, sizeof(bind)))
+ break;
+
+ alloc_unbound.dom = DOMID_SELF;
+ alloc_unbound.remote_dom = bind.remote_domain;
+ rc = HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound,
+ &alloc_unbound);
+ if (rc != 0)
+ break;
+
+ rc = evtchn_bind_to_user(u, alloc_unbound.port);
+ if (rc == 0)
+ rc = alloc_unbound.port;
+ break;
+ }
+
+ case IOCTL_EVTCHN_UNBIND: {
+ struct ioctl_evtchn_unbind unbind;
+
+ rc = -EFAULT;
+ if (copy_from_user(&unbind, uarg, sizeof(unbind)))
+ break;
+
+ rc = -EINVAL;
+ if (unbind.port >= NR_EVENT_CHANNELS)
+ break;
+
+ spin_lock_irq(&port_user_lock);
+
+ rc = -ENOTCONN;
+ if (port_user[unbind.port] != u) {
+ spin_unlock_irq(&port_user_lock);
+ break;
+ }
+
+ evtchn_unbind_from_user(u, unbind.port);
+
+ spin_unlock_irq(&port_user_lock);
+
+ rc = 0;
+ break;
+ }
+
+ case IOCTL_EVTCHN_NOTIFY: {
+ struct ioctl_evtchn_notify notify;
+
+ rc = -EFAULT;
+ if (copy_from_user(¬ify, uarg, sizeof(notify)))
+ break;
+
+ if (notify.port >= NR_EVENT_CHANNELS) {
+ rc = -EINVAL;
+ } else if (port_user[notify.port] != u) {
+ rc = -ENOTCONN;
+ } else {
+ notify_remote_via_evtchn(notify.port);
+ rc = 0;
+ }
+ break;
+ }
+
+ case IOCTL_EVTCHN_RESET: {
+ /* Initialise the ring to empty. Clear errors. */
+ mutex_lock(&u->ring_cons_mutex);
+ spin_lock_irq(&port_user_lock);
+ u->ring_cons = u->ring_prod = u->ring_overflow = 0;
+ spin_unlock_irq(&port_user_lock);
+ mutex_unlock(&u->ring_cons_mutex);
+ rc = 0;
+ break;
+ }
+
+ default:
+ rc = -ENOSYS;
+ break;
+ }
+ mutex_unlock(&u->bind_mutex);
+
+ return rc;
+}
+
+static unsigned int evtchn_poll(struct file *file, poll_table *wait)
+{
+ unsigned int mask = POLLOUT | POLLWRNORM;
+ struct per_user_data *u = file->private_data;
+
+ poll_wait(file, &u->evtchn_wait, wait);
+ if (u->ring_cons != u->ring_prod)
+ mask |= POLLIN | POLLRDNORM;
+ if (u->ring_overflow)
+ mask = POLLERR;
+ return mask;
+}
+
+static int evtchn_fasync(int fd, struct file *filp, int on)
+{
+ struct per_user_data *u = filp->private_data;
+ return fasync_helper(fd, filp, on, &u->evtchn_async_queue);
+}
+
+static int evtchn_open(struct inode *inode, struct file *filp)
+{
+ struct per_user_data *u;
+
+ u = kzalloc(sizeof(*u), GFP_KERNEL);
+ if (u == NULL)
+ return -ENOMEM;
+
+ u->name = kasprintf(GFP_KERNEL, "evtchn:%s", current->comm);
+ if (u->name == NULL) {
+ kfree(u);
+ return -ENOMEM;
+ }
+
+ init_waitqueue_head(&u->evtchn_wait);
+
+ u->ring = (evtchn_port_t *)__get_free_page(GFP_KERNEL);
+ if (u->ring == NULL) {
+ kfree(u->name);
+ kfree(u);
+ return -ENOMEM;
+ }
+
+ mutex_init(&u->bind_mutex);
+ mutex_init(&u->ring_cons_mutex);
+
+ filp->private_data = u;
+
+ return 0;
+}
+
+static int evtchn_release(struct inode *inode, struct file *filp)
+{
+ int i;
+ struct per_user_data *u = filp->private_data;
+
+ spin_lock_irq(&port_user_lock);
+
+ free_page((unsigned long)u->ring);
+
+ for (i = 0; i < NR_EVENT_CHANNELS; i++) {
+ if (port_user[i] != u)
+ continue;
+
+ evtchn_unbind_from_user(port_user[i], i);
+ }
+
+ spin_unlock_irq(&port_user_lock);
+
+ kfree(u->name);
+ kfree(u);
+
+ return 0;
+}
+
+static const struct file_operations evtchn_fops = {
+ .owner = THIS_MODULE,
+ .read = evtchn_read,
+ .write = evtchn_write,
+ .unlocked_ioctl = evtchn_ioctl,
+ .poll = evtchn_poll,
+ .fasync = evtchn_fasync,
+ .open = evtchn_open,
+ .release = evtchn_release,
+};
+
+static struct miscdevice evtchn_miscdev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "evtchn",
+ .fops = &evtchn_fops,
+};
+static int __init evtchn_init(void)
+{
+ int err;
+
+ if (!xen_domain())
+ return -ENODEV;
+
+ spin_lock_init(&port_user_lock);
+ memset(port_user, 0, sizeof(port_user));
+
+ /* Create '/dev/misc/evtchn'. */
+ err = misc_register(&evtchn_miscdev);
+ if (err != 0) {
+ printk(KERN_ALERT "Could not register /dev/misc/evtchn\n");
+ return err;
+ }
+
+ printk(KERN_INFO "Event-channel device installed.\n");
+
+ return 0;
+}
+
+static void __exit evtchn_cleanup(void)
+{
+ misc_deregister(&evtchn_miscdev);
+}
+
+module_init(evtchn_init);
+module_exit(evtchn_cleanup);
+
+MODULE_LICENSE("GPL");
goto out;
}
- printk("suspending xenbus...\n");
- /* XXX use normal device tree? */
- xenbus_suspend();
+ printk(KERN_DEBUG "suspending xenstore...\n");
+ xs_suspend();
err = device_power_down(PMSG_SUSPEND);
if (err) {
if (!cancelled) {
xen_arch_resume();
- xenbus_resume();
+ xs_resume();
} else
- xenbus_suspend_cancel();
+ xs_suspend_cancel();
device_power_up(PMSG_RESUME);
--- /dev/null
+/*
+ * copyright (c) 2006 IBM Corporation
+ * Authored by: Mike D. Day <ncmike@us.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/kobject.h>
+
+#include <asm/xen/hypervisor.h>
+#include <asm/xen/hypercall.h>
+
+#include <xen/xenbus.h>
+#include <xen/interface/xen.h>
+#include <xen/interface/version.h>
+
+#define HYPERVISOR_ATTR_RO(_name) \
+static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
+
+#define HYPERVISOR_ATTR_RW(_name) \
+static struct hyp_sysfs_attr _name##_attr = \
+ __ATTR(_name, 0644, _name##_show, _name##_store)
+
+struct hyp_sysfs_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct hyp_sysfs_attr *, char *);
+ ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t);
+ void *hyp_attr_data;
+};
+
+static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ return sprintf(buffer, "xen\n");
+}
+
+HYPERVISOR_ATTR_RO(type);
+
+static int __init xen_sysfs_type_init(void)
+{
+ return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
+}
+
+static void xen_sysfs_type_destroy(void)
+{
+ sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
+}
+
+/* xen version attributes */
+static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int version = HYPERVISOR_xen_version(XENVER_version, NULL);
+ if (version)
+ return sprintf(buffer, "%d\n", version >> 16);
+ return -ENODEV;
+}
+
+HYPERVISOR_ATTR_RO(major);
+
+static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int version = HYPERVISOR_xen_version(XENVER_version, NULL);
+ if (version)
+ return sprintf(buffer, "%d\n", version & 0xff);
+ return -ENODEV;
+}
+
+HYPERVISOR_ATTR_RO(minor);
+
+static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret = -ENOMEM;
+ char *extra;
+
+ extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
+ if (extra) {
+ ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
+ if (!ret)
+ ret = sprintf(buffer, "%s\n", extra);
+ kfree(extra);
+ }
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(extra);
+
+static struct attribute *version_attrs[] = {
+ &major_attr.attr,
+ &minor_attr.attr,
+ &extra_attr.attr,
+ NULL
+};
+
+static struct attribute_group version_group = {
+ .name = "version",
+ .attrs = version_attrs,
+};
+
+static int __init xen_sysfs_version_init(void)
+{
+ return sysfs_create_group(hypervisor_kobj, &version_group);
+}
+
+static void xen_sysfs_version_destroy(void)
+{
+ sysfs_remove_group(hypervisor_kobj, &version_group);
+}
+
+/* UUID */
+
+static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ char *vm, *val;
+ int ret;
+ extern int xenstored_ready;
+
+ if (!xenstored_ready)
+ return -EBUSY;
+
+ vm = xenbus_read(XBT_NIL, "vm", "", NULL);
+ if (IS_ERR(vm))
+ return PTR_ERR(vm);
+ val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
+ kfree(vm);
+ if (IS_ERR(val))
+ return PTR_ERR(val);
+ ret = sprintf(buffer, "%s\n", val);
+ kfree(val);
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(uuid);
+
+static int __init xen_sysfs_uuid_init(void)
+{
+ return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
+}
+
+static void xen_sysfs_uuid_destroy(void)
+{
+ sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
+}
+
+/* xen compilation attributes */
+
+static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret = -ENOMEM;
+ struct xen_compile_info *info;
+
+ info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
+ if (info) {
+ ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
+ if (!ret)
+ ret = sprintf(buffer, "%s\n", info->compiler);
+ kfree(info);
+ }
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(compiler);
+
+static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret = -ENOMEM;
+ struct xen_compile_info *info;
+
+ info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
+ if (info) {
+ ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
+ if (!ret)
+ ret = sprintf(buffer, "%s\n", info->compile_by);
+ kfree(info);
+ }
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(compiled_by);
+
+static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret = -ENOMEM;
+ struct xen_compile_info *info;
+
+ info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
+ if (info) {
+ ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
+ if (!ret)
+ ret = sprintf(buffer, "%s\n", info->compile_date);
+ kfree(info);
+ }
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(compile_date);
+
+static struct attribute *xen_compile_attrs[] = {
+ &compiler_attr.attr,
+ &compiled_by_attr.attr,
+ &compile_date_attr.attr,
+ NULL
+};
+
+static struct attribute_group xen_compilation_group = {
+ .name = "compilation",
+ .attrs = xen_compile_attrs,
+};
+
+int __init static xen_compilation_init(void)
+{
+ return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
+}
+
+static void xen_compilation_destroy(void)
+{
+ sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
+}
+
+/* xen properties info */
+
+static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret = -ENOMEM;
+ char *caps;
+
+ caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
+ if (caps) {
+ ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
+ if (!ret)
+ ret = sprintf(buffer, "%s\n", caps);
+ kfree(caps);
+ }
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(capabilities);
+
+static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret = -ENOMEM;
+ char *cset;
+
+ cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
+ if (cset) {
+ ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
+ if (!ret)
+ ret = sprintf(buffer, "%s\n", cset);
+ kfree(cset);
+ }
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(changeset);
+
+static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret = -ENOMEM;
+ struct xen_platform_parameters *parms;
+
+ parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
+ if (parms) {
+ ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
+ parms);
+ if (!ret)
+ ret = sprintf(buffer, "%lx\n", parms->virt_start);
+ kfree(parms);
+ }
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(virtual_start);
+
+static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ int ret;
+
+ ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
+ if (ret > 0)
+ ret = sprintf(buffer, "%x\n", ret);
+
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(pagesize);
+
+static ssize_t xen_feature_show(int index, char *buffer)
+{
+ ssize_t ret;
+ struct xen_feature_info info;
+
+ info.submap_idx = index;
+ ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
+ if (!ret)
+ ret = sprintf(buffer, "%08x", info.submap);
+
+ return ret;
+}
+
+static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ ssize_t len;
+ int i;
+
+ len = 0;
+ for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
+ int ret = xen_feature_show(i, buffer + len);
+ if (ret < 0) {
+ if (len == 0)
+ len = ret;
+ break;
+ }
+ len += ret;
+ }
+ if (len > 0)
+ buffer[len++] = '\n';
+
+ return len;
+}
+
+HYPERVISOR_ATTR_RO(features);
+
+static struct attribute *xen_properties_attrs[] = {
+ &capabilities_attr.attr,
+ &changeset_attr.attr,
+ &virtual_start_attr.attr,
+ &pagesize_attr.attr,
+ &features_attr.attr,
+ NULL
+};
+
+static struct attribute_group xen_properties_group = {
+ .name = "properties",
+ .attrs = xen_properties_attrs,
+};
+
+static int __init xen_properties_init(void)
+{
+ return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
+}
+
+static void xen_properties_destroy(void)
+{
+ sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
+}
+
+static int __init hyper_sysfs_init(void)
+{
+ int ret;
+
+ if (!xen_domain())
+ return -ENODEV;
+
+ ret = xen_sysfs_type_init();
+ if (ret)
+ goto out;
+ ret = xen_sysfs_version_init();
+ if (ret)
+ goto version_out;
+ ret = xen_compilation_init();
+ if (ret)
+ goto comp_out;
+ ret = xen_sysfs_uuid_init();
+ if (ret)
+ goto uuid_out;
+ ret = xen_properties_init();
+ if (ret)
+ goto prop_out;
+
+ goto out;
+
+prop_out:
+ xen_sysfs_uuid_destroy();
+uuid_out:
+ xen_compilation_destroy();
+comp_out:
+ xen_sysfs_version_destroy();
+version_out:
+ xen_sysfs_type_destroy();
+out:
+ return ret;
+}
+
+static void __exit hyper_sysfs_exit(void)
+{
+ xen_properties_destroy();
+ xen_compilation_destroy();
+ xen_sysfs_uuid_destroy();
+ xen_sysfs_version_destroy();
+ xen_sysfs_type_destroy();
+
+}
+module_init(hyper_sysfs_init);
+module_exit(hyper_sysfs_exit);
+
+static ssize_t hyp_sysfs_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buffer)
+{
+ struct hyp_sysfs_attr *hyp_attr;
+ hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
+ if (hyp_attr->show)
+ return hyp_attr->show(hyp_attr, buffer);
+ return 0;
+}
+
+static ssize_t hyp_sysfs_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer,
+ size_t len)
+{
+ struct hyp_sysfs_attr *hyp_attr;
+ hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
+ if (hyp_attr->store)
+ return hyp_attr->store(hyp_attr, buffer, len);
+ return 0;
+}
+
+static struct sysfs_ops hyp_sysfs_ops = {
+ .show = hyp_sysfs_show,
+ .store = hyp_sysfs_store,
+};
+
+static struct kobj_type hyp_sysfs_kobj_type = {
+ .sysfs_ops = &hyp_sysfs_ops,
+};
+
+static int __init hypervisor_subsys_init(void)
+{
+ if (!xen_domain())
+ return -ENODEV;
+
+ hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
+ return 0;
+}
+device_initcall(hypervisor_subsys_init);
static void xenbus_dev_shutdown(struct device *_dev);
+static int xenbus_dev_suspend(struct device *dev, pm_message_t state);
+static int xenbus_dev_resume(struct device *dev);
+
/* If something in array of ids matches this device, return it. */
static const struct xenbus_device_id *
match_device(const struct xenbus_device_id *arr, struct xenbus_device *dev)
.remove = xenbus_dev_remove,
.shutdown = xenbus_dev_shutdown,
.dev_attrs = xenbus_dev_attrs,
+
+ .suspend = xenbus_dev_suspend,
+ .resume = xenbus_dev_resume,
},
};
kfree(root);
}
+EXPORT_SYMBOL_GPL(xenbus_dev_changed);
static void frontend_changed(struct xenbus_watch *watch,
const char **vec, unsigned int len)
.callback = frontend_changed,
};
-static int suspend_dev(struct device *dev, void *data)
+static int xenbus_dev_suspend(struct device *dev, pm_message_t state)
{
int err = 0;
struct xenbus_driver *drv;
drv = to_xenbus_driver(dev->driver);
xdev = container_of(dev, struct xenbus_device, dev);
if (drv->suspend)
- err = drv->suspend(xdev);
+ err = drv->suspend(xdev, state);
if (err)
printk(KERN_WARNING
"xenbus: suspend %s failed: %i\n", dev_name(dev), err);
return 0;
}
-static int suspend_cancel_dev(struct device *dev, void *data)
-{
- int err = 0;
- struct xenbus_driver *drv;
- struct xenbus_device *xdev;
-
- DPRINTK("");
-
- if (dev->driver == NULL)
- return 0;
- drv = to_xenbus_driver(dev->driver);
- xdev = container_of(dev, struct xenbus_device, dev);
- if (drv->suspend_cancel)
- err = drv->suspend_cancel(xdev);
- if (err)
- printk(KERN_WARNING
- "xenbus: suspend_cancel %s failed: %i\n",
- dev_name(dev), err);
- return 0;
-}
-
-static int resume_dev(struct device *dev, void *data)
+static int xenbus_dev_resume(struct device *dev)
{
int err;
struct xenbus_driver *drv;
return 0;
}
-void xenbus_suspend(void)
-{
- DPRINTK("");
-
- bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, suspend_dev);
- xenbus_backend_suspend(suspend_dev);
- xs_suspend();
-}
-EXPORT_SYMBOL_GPL(xenbus_suspend);
-
-void xenbus_resume(void)
-{
- xb_init_comms();
- xs_resume();
- bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, resume_dev);
- xenbus_backend_resume(resume_dev);
-}
-EXPORT_SYMBOL_GPL(xenbus_resume);
-
-void xenbus_suspend_cancel(void)
-{
- xs_suspend_cancel();
- bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, suspend_cancel_dev);
- xenbus_backend_resume(suspend_cancel_dev);
-}
-EXPORT_SYMBOL_GPL(xenbus_suspend_cancel);
-
/* A flag to determine if xenstored is 'ready' (i.e. has started) */
int xenstored_ready = 0;
struct xenbus_watch *watch;
char token[sizeof(watch) * 2 + 1];
+ xb_init_comms();
+
mutex_unlock(&xs_state.response_mutex);
mutex_unlock(&xs_state.request_mutex);
up_write(&xs_state.transaction_mutex);
MODULE_DESCRIPTION("Xen filesystem");
MODULE_LICENSE("GPL");
+static ssize_t capabilities_read(struct file *file, char __user *buf,
+ size_t size, loff_t *off)
+{
+ char *tmp = "";
+
+ if (xen_initial_domain())
+ tmp = "control_d\n";
+
+ return simple_read_from_buffer(buf, size, off, tmp, strlen(tmp));
+}
+
+static const struct file_operations capabilities_file_ops = {
+ .read = capabilities_read,
+};
+
static int xenfs_fill_super(struct super_block *sb, void *data, int silent)
{
static struct tree_descr xenfs_files[] = {
- [2] = {"xenbus", &xenbus_file_ops, S_IRUSR|S_IWUSR},
+ [1] = {},
+ { "xenbus", &xenbus_file_ops, S_IRUSR|S_IWUSR },
+ { "capabilities", &capabilities_file_ops, S_IRUGO },
{""},
};
#include <linux/mempool.h>
#include <linux/workqueue.h>
#include <linux/blktrace_api.h>
-#include <trace/block.h>
#include <scsi/sg.h> /* for struct sg_iovec */
-DEFINE_TRACE(block_split);
+#include <trace/events/block.h>
/*
* Test patch to inline a certain number of bi_io_vec's inside the bio
#include <linux/string.h>
#include <linux/init.h>
#include <linux/pagemap.h>
+#include <linux/perf_counter.h>
#include <linux/highmem.h>
#include <linux/spinlock.h>
#include <linux/key.h>
task_lock(tsk);
strlcpy(tsk->comm, buf, sizeof(tsk->comm));
task_unlock(tsk);
+ perf_counter_comm(tsk);
}
int flush_old_exec(struct linux_binprm * bprm)
current->personality &= ~bprm->per_clear;
+ /*
+ * Flush performance counters when crossing a
+ * security domain:
+ */
+ if (!get_dumpable(current->mm))
+ perf_counter_exit_task(current);
+
/* An exec changes our domain. We are no longer part of the thread
group */
static int loadavg_proc_show(struct seq_file *m, void *v)
{
- int a, b, c;
- unsigned long seq;
+ unsigned long avnrun[3];
- do {
- seq = read_seqbegin(&xtime_lock);
- a = avenrun[0] + (FIXED_1/200);
- b = avenrun[1] + (FIXED_1/200);
- c = avenrun[2] + (FIXED_1/200);
- } while (read_seqretry(&xtime_lock, seq));
+ get_avenrun(avnrun, FIXED_1/200, 0);
- seq_printf(m, "%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
- LOAD_INT(a), LOAD_FRAC(a),
- LOAD_INT(b), LOAD_FRAC(b),
- LOAD_INT(c), LOAD_FRAC(c),
+ seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n",
+ LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]),
+ LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]),
+ LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]),
nr_running(), nr_threads,
task_active_pid_ns(current)->last_pid);
return 0;
header-y += rdma/
header-y += video/
header-y += drm/
+header-y += xen/
#define atomic_long_cmpxchg(l, old, new) \
(atomic64_cmpxchg((atomic64_t *)(l), (old), (new)))
#define atomic_long_xchg(v, new) \
- (atomic64_xchg((atomic64_t *)(l), (new)))
+ (atomic64_xchg((atomic64_t *)(v), (new)))
#else /* BITS_PER_LONG == 64 */
#endif
/*
- * A facility to provide batching of the reload of page tables with the
- * actual context switch code for paravirtualized guests. By convention,
- * only one of the lazy modes (CPU, MMU) should be active at any given
- * time, entry should never be nested, and entry and exits should always
- * be paired. This is for sanity of maintaining and reasoning about the
- * kernel code.
+ * A facility to provide batching of the reload of page tables and
+ * other process state with the actual context switch code for
+ * paravirtualized guests. By convention, only one of the batched
+ * update (lazy) modes (CPU, MMU) should be active at any given time,
+ * entry should never be nested, and entry and exits should always be
+ * paired. This is for sanity of maintaining and reasoning about the
+ * kernel code. In this case, the exit (end of the context switch) is
+ * in architecture-specific code, and so doesn't need a generic
+ * definition.
*/
-#ifndef __HAVE_ARCH_ENTER_LAZY_CPU_MODE
-#define arch_enter_lazy_cpu_mode() do {} while (0)
-#define arch_leave_lazy_cpu_mode() do {} while (0)
-#define arch_flush_lazy_cpu_mode() do {} while (0)
+#ifndef __HAVE_ARCH_START_CONTEXT_SWITCH
+#define arch_start_context_switch(prev) do {} while (0)
#endif
#ifndef __HAVE_PFNMAP_TRACKING
#define BRANCH_PROFILE()
#endif
-#ifdef CONFIG_EVENT_TRACER
+#ifdef CONFIG_EVENT_TRACING
#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
*(_ftrace_events) \
VMLINUX_SYMBOL(__stop_ftrace_events) = .;
extern int sbf_port;
extern unsigned long acpi_realmode_flags;
-int acpi_register_gsi (u32 gsi, int triggering, int polarity);
+int acpi_register_gsi (struct device *dev, u32 gsi, int triggering, int polarity);
int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
#ifdef CONFIG_X86_IO_APIC
* The remap event
*/
struct blk_io_trace_remap {
- __be32 device;
__be32 device_from;
- __be64 sector;
+ __be32 device_to;
+ __be64 sector_from;
};
enum {
extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
extern void blk_trace_shutdown(struct request_queue *);
-extern int do_blk_trace_setup(struct request_queue *q,
- char *name, dev_t dev, struct blk_user_trace_setup *buts);
+extern int do_blk_trace_setup(struct request_queue *q, char *name,
+ dev_t dev, struct block_device *bdev,
+ struct blk_user_trace_setup *buts);
extern void __trace_note_message(struct blk_trace *, const char *fmt, ...);
/**
extern void blk_add_driver_data(struct request_queue *q, struct request *rq,
void *data, size_t len);
extern int blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
+ struct block_device *bdev,
char __user *arg);
extern int blk_trace_startstop(struct request_queue *q, int start);
extern int blk_trace_remove(struct request_queue *q);
+extern int blk_trace_init_sysfs(struct device *dev);
extern struct attribute_group blk_trace_attr_group;
#else /* !CONFIG_BLK_DEV_IO_TRACE */
-#define blk_trace_ioctl(bdev, cmd, arg) (-ENOTTY)
-#define blk_trace_shutdown(q) do { } while (0)
-#define do_blk_trace_setup(q, name, dev, buts) (-ENOTTY)
-#define blk_add_driver_data(q, rq, data, len) do {} while (0)
-#define blk_trace_setup(q, name, dev, arg) (-ENOTTY)
-#define blk_trace_startstop(q, start) (-ENOTTY)
-#define blk_trace_remove(q) (-ENOTTY)
-#define blk_add_trace_msg(q, fmt, ...) do { } while (0)
+# define blk_trace_ioctl(bdev, cmd, arg) (-ENOTTY)
+# define blk_trace_shutdown(q) do { } while (0)
+# define do_blk_trace_setup(q, name, dev, bdev, buts) (-ENOTTY)
+# define blk_add_driver_data(q, rq, data, len) do {} while (0)
+# define blk_trace_setup(q, name, dev, bdev, arg) (-ENOTTY)
+# define blk_trace_startstop(q, start) (-ENOTTY)
+# define blk_trace_remove(q) (-ENOTTY)
+# define blk_add_trace_msg(q, fmt, ...) do { } while (0)
+static inline int blk_trace_init_sysfs(struct device *dev)
+{
+ return 0;
+}
#endif /* CONFIG_BLK_DEV_IO_TRACE */
+
+#if defined(CONFIG_EVENT_TRACING) && defined(CONFIG_BLOCK)
+
+static inline int blk_cmd_buf_len(struct request *rq)
+{
+ return blk_pc_request(rq) ? rq->cmd_len * 3 : 1;
+}
+
+extern void blk_dump_cmd(char *buf, struct request *rq);
+extern void blk_fill_rwbs(char *rwbs, u32 rw, int bytes);
+extern void blk_fill_rwbs_rq(char *rwbs, struct request *rq);
+
+#endif /* CONFIG_EVENT_TRACING && CONFIG_BLOCK */
+
#endif /* __KERNEL__ */
#endif
int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
int get_compat_sigevent(struct sigevent *event,
const struct compat_sigevent __user *u_event);
+long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
+ struct compat_siginfo __user *uinfo);
static inline int compat_timeval_compare(struct compat_timeval *lhs,
struct compat_timeval *rhs)
extern void dma_debug_init(u32 num_entries);
+extern int dma_debug_resize_entries(u32 num_entries);
+
extern void debug_dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
int direction, dma_addr_t dma_addr,
{
}
+static inline int dma_debug_resize_entries(u32 num_entries)
+{
+ return 0;
+}
+
static inline void debug_dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
int direction, dma_addr_t dma_addr,
};
#ifdef CONFIG_INTR_REMAP
extern int intr_remapping_enabled;
+extern int intr_remapping_supported(void);
extern int enable_intr_remapping(int);
extern void disable_intr_remapping(void);
extern int reenable_intr_remapping(int);
}
#define irq_remapped(irq) (0)
#define enable_intr_remapping(mode) (-1)
+#define disable_intr_remapping() (0)
+#define reenable_intr_remapping(mode) (0)
#define intr_remapping_enabled (0)
#endif
extern int skip_trace(unsigned long ip);
-extern void ftrace_release(void *start, unsigned long size);
-
extern void ftrace_disable_daemon(void);
extern void ftrace_enable_daemon(void);
#else
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
extern void ftrace_init(void);
-extern void ftrace_init_module(struct module *mod,
- unsigned long *start, unsigned long *end);
#else
static inline void ftrace_init(void) { }
-static inline void
-ftrace_init_module(struct module *mod,
- unsigned long *start, unsigned long *end) { }
#endif
/*
unsigned long ret;
unsigned long func;
unsigned long long calltime;
+ unsigned long long subtime;
};
/*
extern int
ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth);
-extern void
-ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret);
/*
* Sometimes we don't want to trace a function with the function
extern int ftrace_dump_on_oops;
+#ifdef CONFIG_PREEMPT
+#define INIT_TRACE_RECURSION .trace_recursion = 0,
+#endif
+
#endif /* CONFIG_TRACING */
+#ifndef INIT_TRACE_RECURSION
+#define INIT_TRACE_RECURSION
+#endif
#ifdef CONFIG_HW_BRANCH_TRACER
--- /dev/null
+#ifndef _LINUX_FTRACE_EVENT_H
+#define _LINUX_FTRACE_EVENT_H
+
+#include <linux/trace_seq.h>
+#include <linux/ring_buffer.h>
+#include <linux/percpu.h>
+
+struct trace_array;
+struct tracer;
+struct dentry;
+
+DECLARE_PER_CPU(struct trace_seq, ftrace_event_seq);
+
+struct trace_print_flags {
+ unsigned long mask;
+ const char *name;
+};
+
+const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
+ unsigned long flags,
+ const struct trace_print_flags *flag_array);
+
+const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
+ const struct trace_print_flags *symbol_array);
+
+/*
+ * The trace entry - the most basic unit of tracing. This is what
+ * is printed in the end as a single line in the trace output, such as:
+ *
+ * bash-15816 [01] 235.197585: idle_cpu <- irq_enter
+ */
+struct trace_entry {
+ unsigned short type;
+ unsigned char flags;
+ unsigned char preempt_count;
+ int pid;
+ int tgid;
+};
+
+#define FTRACE_MAX_EVENT \
+ ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
+
+/*
+ * Trace iterator - used by printout routines who present trace
+ * results to users and which routines might sleep, etc:
+ */
+struct trace_iterator {
+ struct trace_array *tr;
+ struct tracer *trace;
+ void *private;
+ int cpu_file;
+ struct mutex mutex;
+ struct ring_buffer_iter *buffer_iter[NR_CPUS];
+ unsigned long iter_flags;
+
+ /* The below is zeroed out in pipe_read */
+ struct trace_seq seq;
+ struct trace_entry *ent;
+ int cpu;
+ u64 ts;
+
+ loff_t pos;
+ long idx;
+
+ cpumask_var_t started;
+};
+
+
+typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
+ int flags);
+struct trace_event {
+ struct hlist_node node;
+ struct list_head list;
+ int type;
+ trace_print_func trace;
+ trace_print_func raw;
+ trace_print_func hex;
+ trace_print_func binary;
+};
+
+extern int register_ftrace_event(struct trace_event *event);
+extern int unregister_ftrace_event(struct trace_event *event);
+
+/* Return values for print_line callback */
+enum print_line_t {
+ TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
+ TRACE_TYPE_HANDLED = 1,
+ TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */
+ TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */
+};
+
+
+struct ring_buffer_event *
+trace_current_buffer_lock_reserve(int type, unsigned long len,
+ unsigned long flags, int pc);
+void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
+ unsigned long flags, int pc);
+void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
+ unsigned long flags, int pc);
+void trace_current_buffer_discard_commit(struct ring_buffer_event *event);
+
+void tracing_record_cmdline(struct task_struct *tsk);
+
+struct ftrace_event_call {
+ struct list_head list;
+ char *name;
+ char *system;
+ struct dentry *dir;
+ struct trace_event *event;
+ int enabled;
+ int (*regfunc)(void);
+ void (*unregfunc)(void);
+ int id;
+ int (*raw_init)(void);
+ int (*show_format)(struct trace_seq *s);
+ int (*define_fields)(void);
+ struct list_head fields;
+ int filter_active;
+ void *filter;
+ void *mod;
+
+#ifdef CONFIG_EVENT_PROFILE
+ atomic_t profile_count;
+ int (*profile_enable)(struct ftrace_event_call *);
+ void (*profile_disable)(struct ftrace_event_call *);
+#endif
+};
+
+#define MAX_FILTER_PRED 32
+#define MAX_FILTER_STR_VAL 128
+
+extern int init_preds(struct ftrace_event_call *call);
+extern void destroy_preds(struct ftrace_event_call *call);
+extern int filter_match_preds(struct ftrace_event_call *call, void *rec);
+extern int filter_current_check_discard(struct ftrace_event_call *call,
+ void *rec,
+ struct ring_buffer_event *event);
+
+extern int trace_define_field(struct ftrace_event_call *call, char *type,
+ char *name, int offset, int size, int is_signed);
+
+#define is_signed_type(type) (((type)(-1)) < 0)
+
+int trace_set_clr_event(const char *system, const char *event, int set);
+
+/*
+ * The double __builtin_constant_p is because gcc will give us an error
+ * if we try to allocate the static variable to fmt if it is not a
+ * constant. Even with the outer if statement optimizing out.
+ */
+#define event_trace_printk(ip, fmt, args...) \
+do { \
+ __trace_printk_check_format(fmt, ##args); \
+ tracing_record_cmdline(current); \
+ if (__builtin_constant_p(fmt)) { \
+ static const char *trace_printk_fmt \
+ __attribute__((section("__trace_printk_fmt"))) = \
+ __builtin_constant_p(fmt) ? fmt : NULL; \
+ \
+ __trace_bprintk(ip, trace_printk_fmt, ##args); \
+ } else \
+ __trace_printk(ip, fmt, ##args); \
+} while (0)
+
+#define __common_field(type, item, is_signed) \
+ ret = trace_define_field(event_call, #type, "common_" #item, \
+ offsetof(typeof(field.ent), item), \
+ sizeof(field.ent.item), is_signed); \
+ if (ret) \
+ return ret;
+
+#endif /* _LINUX_FTRACE_EVENT_H */
#define FUTEX_TRYLOCK_PI 8
#define FUTEX_WAIT_BITSET 9
#define FUTEX_WAKE_BITSET 10
+#define FUTEX_WAIT_REQUEUE_PI 11
+#define FUTEX_CMP_REQUEUE_PI 12
#define FUTEX_PRIVATE_FLAG 128
#define FUTEX_CLOCK_REALTIME 256
#define FUTEX_TRYLOCK_PI_PRIVATE (FUTEX_TRYLOCK_PI | FUTEX_PRIVATE_FLAG)
#define FUTEX_WAIT_BITSET_PRIVATE (FUTEX_WAIT_BITS | FUTEX_PRIVATE_FLAG)
#define FUTEX_WAKE_BITSET_PRIVATE (FUTEX_WAKE_BITS | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAIT_REQUEUE_PI_PRIVATE (FUTEX_WAIT_REQUEUE_PI | \
+ FUTEX_PRIVATE_FLAG)
+#define FUTEX_CMP_REQUEUE_PI_PRIVATE (FUTEX_CMP_REQUEUE_PI | \
+ FUTEX_PRIVATE_FLAG)
/*
* Support for robust futexes: the kernel cleans up held futexes at
extern struct cred init_cred;
+#ifdef CONFIG_PERF_COUNTERS
+# define INIT_PERF_COUNTERS(tsk) \
+ .perf_counter_mutex = \
+ __MUTEX_INITIALIZER(tsk.perf_counter_mutex), \
+ .perf_counter_list = LIST_HEAD_INIT(tsk.perf_counter_list),
+#else
+# define INIT_PERF_COUNTERS(tsk)
+#endif
+
/*
* INIT_TASK is used to set up the first task table, touch at
* your own risk!. Base=0, limit=0x1fffff (=2MB)
}, \
.dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
INIT_IDS \
+ INIT_PERF_COUNTERS(tsk) \
INIT_TRACE_IRQFLAGS \
INIT_LOCKDEP \
INIT_FTRACE_GRAPH \
+ INIT_TRACE_RECURSION \
}
extern int early_irq_init(void);
extern int arch_probe_nr_irqs(void);
extern int arch_early_irq_init(void);
-extern int arch_init_chip_data(struct irq_desc *desc, int cpu);
+extern int arch_init_chip_data(struct irq_desc *desc, int node);
#endif
void (*eoi)(unsigned int irq);
void (*end)(unsigned int irq);
- void (*set_affinity)(unsigned int irq,
+ int (*set_affinity)(unsigned int irq,
const struct cpumask *dest);
int (*retrigger)(unsigned int irq);
int (*set_type)(unsigned int irq, unsigned int flow_type);
spinlock_t lock;
#ifdef CONFIG_SMP
cpumask_var_t affinity;
- unsigned int cpu;
+ unsigned int node;
#ifdef CONFIG_GENERIC_PENDING_IRQ
cpumask_var_t pending_mask;
#endif
} ____cacheline_internodealigned_in_smp;
extern void arch_init_copy_chip_data(struct irq_desc *old_desc,
- struct irq_desc *desc, int cpu);
+ struct irq_desc *desc, int node);
extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc);
#ifndef CONFIG_SPARSE_IRQ
extern struct irq_desc irq_desc[NR_IRQS];
-#else /* CONFIG_SPARSE_IRQ */
-extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int cpu);
-#endif /* CONFIG_SPARSE_IRQ */
-
-extern struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu);
+#endif
-static inline struct irq_desc *
-irq_remap_to_desc(unsigned int irq, struct irq_desc *desc)
-{
-#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
- return irq_to_desc(irq);
+#ifdef CONFIG_NUMA_IRQ_DESC
+extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
#else
+static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
+{
return desc;
-#endif
}
+#endif
+
+extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);
/*
* Migration helpers for obsolete names, they will go away:
extern void set_irq_probe(unsigned int irq);
/* Handle dynamic irq creation and destruction */
-extern unsigned int create_irq_nr(unsigned int irq_want);
+extern unsigned int create_irq_nr(unsigned int irq_want, int node);
extern int create_irq(void);
extern void destroy_irq(unsigned int irq);
#ifdef CONFIG_SMP
/**
- * init_alloc_desc_masks - allocate cpumasks for irq_desc
+ * alloc_desc_masks - allocate cpumasks for irq_desc
* @desc: pointer to irq_desc struct
* @cpu: cpu which will be handling the cpumasks
* @boot: true if need bootmem
*
* Allocates affinity and pending_mask cpumask if required.
* Returns true if successful (or not required).
- * Side effect: affinity has all bits set, pending_mask has all bits clear.
*/
-static inline bool init_alloc_desc_masks(struct irq_desc *desc, int cpu,
+static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
bool boot)
{
- int node;
-
+#ifdef CONFIG_CPUMASK_OFFSTACK
if (boot) {
alloc_bootmem_cpumask_var(&desc->affinity);
- cpumask_setall(desc->affinity);
#ifdef CONFIG_GENERIC_PENDING_IRQ
alloc_bootmem_cpumask_var(&desc->pending_mask);
- cpumask_clear(desc->pending_mask);
#endif
return true;
}
- node = cpu_to_node(cpu);
-
if (!alloc_cpumask_var_node(&desc->affinity, GFP_ATOMIC, node))
return false;
- cpumask_setall(desc->affinity);
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (!alloc_cpumask_var_node(&desc->pending_mask, GFP_ATOMIC, node)) {
free_cpumask_var(desc->affinity);
return false;
}
- cpumask_clear(desc->pending_mask);
+#endif
#endif
return true;
}
+static inline void init_desc_masks(struct irq_desc *desc)
+{
+ cpumask_setall(desc->affinity);
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ cpumask_clear(desc->pending_mask);
+#endif
+}
+
/**
* init_copy_desc_masks - copy cpumasks for irq_desc
* @old_desc: pointer to old irq_desc struct
static inline void init_copy_desc_masks(struct irq_desc *old_desc,
struct irq_desc *new_desc)
{
-#ifdef CONFIG_CPUMASKS_OFFSTACK
+#ifdef CONFIG_CPUMASK_OFFSTACK
cpumask_copy(new_desc->affinity, old_desc->affinity);
#ifdef CONFIG_GENERIC_PENDING_IRQ
#else /* !CONFIG_SMP */
-static inline bool init_alloc_desc_masks(struct irq_desc *desc, int cpu,
+static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
bool boot)
{
return true;
}
+static inline void init_desc_masks(struct irq_desc *desc)
+{
+}
+
static inline void init_copy_desc_masks(struct irq_desc *old_desc,
struct irq_desc *new_desc)
{
return sum;
}
+
+/*
+ * Lock/unlock the current runqueue - to extract task statistics:
+ */
extern unsigned long long task_delta_exec(struct task_struct *);
+
extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
extern void account_steal_time(cputime_t);
--- /dev/null
+/*
+ * Copyright (C) 2008 Eduard - Gabriel Munteanu
+ *
+ * This file is released under GPL version 2.
+ */
+
+#ifndef _LINUX_KMEMTRACE_H
+#define _LINUX_KMEMTRACE_H
+
+#ifdef __KERNEL__
+
+#include <trace/events/kmem.h>
+
+#ifdef CONFIG_KMEMTRACE
+extern void kmemtrace_init(void);
+#else
+static inline void kmemtrace_init(void)
+{
+}
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_KMEMTRACE_H */
+
struct file_ra_state;
struct user_struct;
struct writeback_control;
+struct rlimit;
#ifndef CONFIG_DISCONTIGMEM /* Don't use mapnrs, do it properly */
extern unsigned long max_mapnr;
unsigned long end_pfn);
extern void remove_active_range(unsigned int nid, unsigned long start_pfn,
unsigned long end_pfn);
-extern void push_node_boundaries(unsigned int nid, unsigned long start_pfn,
- unsigned long end_pfn);
extern void remove_all_active_ranges(void);
extern unsigned long absent_pages_in_range(unsigned long start_pfn,
unsigned long end_pfn);
int vmemmap_populate(struct page *start_page, unsigned long pages, int node);
void vmemmap_populate_print_last(void);
-extern void *alloc_locked_buffer(size_t size);
-extern void free_locked_buffer(void *buffer, size_t size);
-extern void release_locked_buffer(void *buffer, size_t size);
+extern int account_locked_memory(struct mm_struct *mm, struct rlimit *rlim,
+ size_t size);
+extern void refund_locked_memory(struct mm_struct *mm, size_t size);
#endif /* __KERNEL__ */
#endif /* _LINUX_MM_H */
extern int register_kmmio_probe(struct kmmio_probe *p);
extern void unregister_kmmio_probe(struct kmmio_probe *p);
+extern int kmmio_init(void);
+extern void kmmio_cleanup(void);
#ifdef CONFIG_MMIOTRACE
/* kmmio is active by some kmmio_probes? */
const char **trace_bprintk_fmt_start;
unsigned int num_trace_bprintk_fmt;
#endif
+#ifdef CONFIG_EVENT_TRACING
+ struct ftrace_event_call *trace_events;
+ unsigned int num_trace_events;
+#endif
+#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+ unsigned long *ftrace_callsites;
+ unsigned int num_ftrace_callsites;
+#endif
#ifdef CONFIG_MODULE_UNLOAD
/* What modules depend on me? */
*/
extern int mutex_trylock(struct mutex *lock);
extern void mutex_unlock(struct mutex *lock);
+extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock);
#endif
--- /dev/null
+/*
+ * Performance counters:
+ *
+ * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
+ * Copyright (C) 2008-2009, Red Hat, Inc., Ingo Molnar
+ * Copyright (C) 2008-2009, Red Hat, Inc., Peter Zijlstra
+ *
+ * Data type definitions, declarations, prototypes.
+ *
+ * Started by: Thomas Gleixner and Ingo Molnar
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+#ifndef _LINUX_PERF_COUNTER_H
+#define _LINUX_PERF_COUNTER_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#include <asm/byteorder.h>
+
+/*
+ * User-space ABI bits:
+ */
+
+/*
+ * attr.type
+ */
+enum perf_type_id {
+ PERF_TYPE_HARDWARE = 0,
+ PERF_TYPE_SOFTWARE = 1,
+ PERF_TYPE_TRACEPOINT = 2,
+ PERF_TYPE_HW_CACHE = 3,
+ PERF_TYPE_RAW = 4,
+
+ PERF_TYPE_MAX, /* non-ABI */
+};
+
+/*
+ * Generalized performance counter event types, used by the
+ * attr.event_id parameter of the sys_perf_counter_open()
+ * syscall:
+ */
+enum perf_hw_id {
+ /*
+ * Common hardware events, generalized by the kernel:
+ */
+ PERF_COUNT_HW_CPU_CYCLES = 0,
+ PERF_COUNT_HW_INSTRUCTIONS = 1,
+ PERF_COUNT_HW_CACHE_REFERENCES = 2,
+ PERF_COUNT_HW_CACHE_MISSES = 3,
+ PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
+ PERF_COUNT_HW_BRANCH_MISSES = 5,
+ PERF_COUNT_HW_BUS_CYCLES = 6,
+
+ PERF_COUNT_HW_MAX, /* non-ABI */
+};
+
+/*
+ * Generalized hardware cache counters:
+ *
+ * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
+ * { read, write, prefetch } x
+ * { accesses, misses }
+ */
+enum perf_hw_cache_id {
+ PERF_COUNT_HW_CACHE_L1D = 0,
+ PERF_COUNT_HW_CACHE_L1I = 1,
+ PERF_COUNT_HW_CACHE_LL = 2,
+ PERF_COUNT_HW_CACHE_DTLB = 3,
+ PERF_COUNT_HW_CACHE_ITLB = 4,
+ PERF_COUNT_HW_CACHE_BPU = 5,
+
+ PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
+};
+
+enum perf_hw_cache_op_id {
+ PERF_COUNT_HW_CACHE_OP_READ = 0,
+ PERF_COUNT_HW_CACHE_OP_WRITE = 1,
+ PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
+
+ PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
+};
+
+enum perf_hw_cache_op_result_id {
+ PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
+ PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
+
+ PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
+};
+
+/*
+ * Special "software" counters provided by the kernel, even if the hardware
+ * does not support performance counters. These counters measure various
+ * physical and sw events of the kernel (and allow the profiling of them as
+ * well):
+ */
+enum perf_sw_ids {
+ PERF_COUNT_SW_CPU_CLOCK = 0,
+ PERF_COUNT_SW_TASK_CLOCK = 1,
+ PERF_COUNT_SW_PAGE_FAULTS = 2,
+ PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
+ PERF_COUNT_SW_CPU_MIGRATIONS = 4,
+ PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
+ PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
+
+ PERF_COUNT_SW_MAX, /* non-ABI */
+};
+
+/*
+ * Bits that can be set in attr.sample_type to request information
+ * in the overflow packets.
+ */
+enum perf_counter_sample_format {
+ PERF_SAMPLE_IP = 1U << 0,
+ PERF_SAMPLE_TID = 1U << 1,
+ PERF_SAMPLE_TIME = 1U << 2,
+ PERF_SAMPLE_ADDR = 1U << 3,
+ PERF_SAMPLE_GROUP = 1U << 4,
+ PERF_SAMPLE_CALLCHAIN = 1U << 5,
+ PERF_SAMPLE_ID = 1U << 6,
+ PERF_SAMPLE_CPU = 1U << 7,
+ PERF_SAMPLE_PERIOD = 1U << 8,
+};
+
+/*
+ * Bits that can be set in attr.read_format to request that
+ * reads on the counter should return the indicated quantities,
+ * in increasing order of bit value, after the counter value.
+ */
+enum perf_counter_read_format {
+ PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0,
+ PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1,
+ PERF_FORMAT_ID = 1U << 2,
+};
+
+/*
+ * Hardware event to monitor via a performance monitoring counter:
+ */
+struct perf_counter_attr {
+ /*
+ * Major type: hardware/software/tracepoint/etc.
+ */
+ __u32 type;
+ __u32 __reserved_1;
+
+ /*
+ * Type specific configuration information.
+ */
+ __u64 config;
+
+ union {
+ __u64 sample_period;
+ __u64 sample_freq;
+ };
+
+ __u64 sample_type;
+ __u64 read_format;
+
+ __u64 disabled : 1, /* off by default */
+ inherit : 1, /* children inherit it */
+ pinned : 1, /* must always be on PMU */
+ exclusive : 1, /* only group on PMU */
+ exclude_user : 1, /* don't count user */
+ exclude_kernel : 1, /* ditto kernel */
+ exclude_hv : 1, /* ditto hypervisor */
+ exclude_idle : 1, /* don't count when idle */
+ mmap : 1, /* include mmap data */
+ comm : 1, /* include comm data */
+ freq : 1, /* use freq, not period */
+
+ __reserved_2 : 53;
+
+ __u32 wakeup_events; /* wakeup every n events */
+ __u32 __reserved_3;
+
+ __u64 __reserved_4;
+};
+
+/*
+ * Ioctls that can be done on a perf counter fd:
+ */
+#define PERF_COUNTER_IOC_ENABLE _IO ('$', 0)
+#define PERF_COUNTER_IOC_DISABLE _IO ('$', 1)
+#define PERF_COUNTER_IOC_REFRESH _IO ('$', 2)
+#define PERF_COUNTER_IOC_RESET _IO ('$', 3)
+#define PERF_COUNTER_IOC_PERIOD _IOW('$', 4, u64)
+
+enum perf_counter_ioc_flags {
+ PERF_IOC_FLAG_GROUP = 1U << 0,
+};
+
+/*
+ * Structure of the page that can be mapped via mmap
+ */
+struct perf_counter_mmap_page {
+ __u32 version; /* version number of this structure */
+ __u32 compat_version; /* lowest version this is compat with */
+
+ /*
+ * Bits needed to read the hw counters in user-space.
+ *
+ * u32 seq;
+ * s64 count;
+ *
+ * do {
+ * seq = pc->lock;
+ *
+ * barrier()
+ * if (pc->index) {
+ * count = pmc_read(pc->index - 1);
+ * count += pc->offset;
+ * } else
+ * goto regular_read;
+ *
+ * barrier();
+ * } while (pc->lock != seq);
+ *
+ * NOTE: for obvious reason this only works on self-monitoring
+ * processes.
+ */
+ __u32 lock; /* seqlock for synchronization */
+ __u32 index; /* hardware counter identifier */
+ __s64 offset; /* add to hardware counter value */
+
+ /*
+ * Control data for the mmap() data buffer.
+ *
+ * User-space reading this value should issue an rmb(), on SMP capable
+ * platforms, after reading this value -- see perf_counter_wakeup().
+ */
+ __u64 data_head; /* head in the data section */
+};
+
+#define PERF_EVENT_MISC_CPUMODE_MASK (3 << 0)
+#define PERF_EVENT_MISC_CPUMODE_UNKNOWN (0 << 0)
+#define PERF_EVENT_MISC_KERNEL (1 << 0)
+#define PERF_EVENT_MISC_USER (2 << 0)
+#define PERF_EVENT_MISC_HYPERVISOR (3 << 0)
+#define PERF_EVENT_MISC_OVERFLOW (1 << 2)
+
+struct perf_event_header {
+ __u32 type;
+ __u16 misc;
+ __u16 size;
+};
+
+enum perf_event_type {
+
+ /*
+ * The MMAP events record the PROT_EXEC mappings so that we can
+ * correlate userspace IPs to code. They have the following structure:
+ *
+ * struct {
+ * struct perf_event_header header;
+ *
+ * u32 pid, tid;
+ * u64 addr;
+ * u64 len;
+ * u64 pgoff;
+ * char filename[];
+ * };
+ */
+ PERF_EVENT_MMAP = 1,
+
+ /*
+ * struct {
+ * struct perf_event_header header;
+ *
+ * u32 pid, tid;
+ * char comm[];
+ * };
+ */
+ PERF_EVENT_COMM = 3,
+
+ /*
+ * struct {
+ * struct perf_event_header header;
+ * u64 time;
+ * u64 id;
+ * u64 sample_period;
+ * };
+ */
+ PERF_EVENT_PERIOD = 4,
+
+ /*
+ * struct {
+ * struct perf_event_header header;
+ * u64 time;
+ * u64 id;
+ * };
+ */
+ PERF_EVENT_THROTTLE = 5,
+ PERF_EVENT_UNTHROTTLE = 6,
+
+ /*
+ * struct {
+ * struct perf_event_header header;
+ * u32 pid, ppid;
+ * };
+ */
+ PERF_EVENT_FORK = 7,
+
+ /*
+ * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field
+ * will be PERF_RECORD_*
+ *
+ * struct {
+ * struct perf_event_header header;
+ *
+ * { u64 ip; } && PERF_RECORD_IP
+ * { u32 pid, tid; } && PERF_RECORD_TID
+ * { u64 time; } && PERF_RECORD_TIME
+ * { u64 addr; } && PERF_RECORD_ADDR
+ * { u64 config; } && PERF_RECORD_CONFIG
+ * { u32 cpu, res; } && PERF_RECORD_CPU
+ *
+ * { u64 nr;
+ * { u64 id, val; } cnt[nr]; } && PERF_RECORD_GROUP
+ *
+ * { u16 nr,
+ * hv,
+ * kernel,
+ * user;
+ * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN
+ * };
+ */
+};
+
+#ifdef __KERNEL__
+/*
+ * Kernel-internal data types and definitions:
+ */
+
+#ifdef CONFIG_PERF_COUNTERS
+# include <asm/perf_counter.h>
+#endif
+
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/rculist.h>
+#include <linux/rcupdate.h>
+#include <linux/spinlock.h>
+#include <linux/hrtimer.h>
+#include <linux/fs.h>
+#include <linux/pid_namespace.h>
+#include <asm/atomic.h>
+
+struct task_struct;
+
+/**
+ * struct hw_perf_counter - performance counter hardware details:
+ */
+struct hw_perf_counter {
+#ifdef CONFIG_PERF_COUNTERS
+ union {
+ struct { /* hardware */
+ u64 config;
+ unsigned long config_base;
+ unsigned long counter_base;
+ int idx;
+ };
+ union { /* software */
+ atomic64_t count;
+ struct hrtimer hrtimer;
+ };
+ };
+ atomic64_t prev_count;
+ u64 sample_period;
+ u64 last_period;
+ atomic64_t period_left;
+ u64 interrupts;
+
+ u64 freq_count;
+ u64 freq_interrupts;
+ u64 freq_stamp;
+#endif
+};
+
+struct perf_counter;
+
+/**
+ * struct pmu - generic performance monitoring unit
+ */
+struct pmu {
+ int (*enable) (struct perf_counter *counter);
+ void (*disable) (struct perf_counter *counter);
+ void (*read) (struct perf_counter *counter);
+ void (*unthrottle) (struct perf_counter *counter);
+};
+
+/**
+ * enum perf_counter_active_state - the states of a counter
+ */
+enum perf_counter_active_state {
+ PERF_COUNTER_STATE_ERROR = -2,
+ PERF_COUNTER_STATE_OFF = -1,
+ PERF_COUNTER_STATE_INACTIVE = 0,
+ PERF_COUNTER_STATE_ACTIVE = 1,
+};
+
+struct file;
+
+struct perf_mmap_data {
+ struct rcu_head rcu_head;
+ int nr_pages; /* nr of data pages */
+ int nr_locked; /* nr pages mlocked */
+
+ atomic_t poll; /* POLL_ for wakeups */
+ atomic_t events; /* event limit */
+
+ atomic_long_t head; /* write position */
+ atomic_long_t done_head; /* completed head */
+
+ atomic_t lock; /* concurrent writes */
+
+ atomic_t wakeup; /* needs a wakeup */
+
+ struct perf_counter_mmap_page *user_page;
+ void *data_pages[0];
+};
+
+struct perf_pending_entry {
+ struct perf_pending_entry *next;
+ void (*func)(struct perf_pending_entry *);
+};
+
+/**
+ * struct perf_counter - performance counter kernel representation:
+ */
+struct perf_counter {
+#ifdef CONFIG_PERF_COUNTERS
+ struct list_head list_entry;
+ struct list_head event_entry;
+ struct list_head sibling_list;
+ int nr_siblings;
+ struct perf_counter *group_leader;
+ const struct pmu *pmu;
+
+ enum perf_counter_active_state state;
+ atomic64_t count;
+
+ /*
+ * These are the total time in nanoseconds that the counter
+ * has been enabled (i.e. eligible to run, and the task has
+ * been scheduled in, if this is a per-task counter)
+ * and running (scheduled onto the CPU), respectively.
+ *
+ * They are computed from tstamp_enabled, tstamp_running and
+ * tstamp_stopped when the counter is in INACTIVE or ACTIVE state.
+ */
+ u64 total_time_enabled;
+ u64 total_time_running;
+
+ /*
+ * These are timestamps used for computing total_time_enabled
+ * and total_time_running when the counter is in INACTIVE or
+ * ACTIVE state, measured in nanoseconds from an arbitrary point
+ * in time.
+ * tstamp_enabled: the notional time when the counter was enabled
+ * tstamp_running: the notional time when the counter was scheduled on
+ * tstamp_stopped: in INACTIVE state, the notional time when the
+ * counter was scheduled off.
+ */
+ u64 tstamp_enabled;
+ u64 tstamp_running;
+ u64 tstamp_stopped;
+
+ struct perf_counter_attr attr;
+ struct hw_perf_counter hw;
+
+ struct perf_counter_context *ctx;
+ struct file *filp;
+
+ /*
+ * These accumulate total time (in nanoseconds) that children
+ * counters have been enabled and running, respectively.
+ */
+ atomic64_t child_total_time_enabled;
+ atomic64_t child_total_time_running;
+
+ /*
+ * Protect attach/detach and child_list:
+ */
+ struct mutex child_mutex;
+ struct list_head child_list;
+ struct perf_counter *parent;
+
+ int oncpu;
+ int cpu;
+
+ struct list_head owner_entry;
+ struct task_struct *owner;
+
+ /* mmap bits */
+ struct mutex mmap_mutex;
+ atomic_t mmap_count;
+ struct perf_mmap_data *data;
+
+ /* poll related */
+ wait_queue_head_t waitq;
+ struct fasync_struct *fasync;
+
+ /* delayed work for NMIs and such */
+ int pending_wakeup;
+ int pending_kill;
+ int pending_disable;
+ struct perf_pending_entry pending;
+
+ atomic_t event_limit;
+
+ void (*destroy)(struct perf_counter *);
+ struct rcu_head rcu_head;
+
+ struct pid_namespace *ns;
+ u64 id;
+#endif
+};
+
+/**
+ * struct perf_counter_context - counter context structure
+ *
+ * Used as a container for task counters and CPU counters as well:
+ */
+struct perf_counter_context {
+ /*
+ * Protect the states of the counters in the list,
+ * nr_active, and the list:
+ */
+ spinlock_t lock;
+ /*
+ * Protect the list of counters. Locking either mutex or lock
+ * is sufficient to ensure the list doesn't change; to change
+ * the list you need to lock both the mutex and the spinlock.
+ */
+ struct mutex mutex;
+
+ struct list_head counter_list;
+ struct list_head event_list;
+ int nr_counters;
+ int nr_active;
+ int is_active;
+ atomic_t refcount;
+ struct task_struct *task;
+
+ /*
+ * Context clock, runs when context enabled.
+ */
+ u64 time;
+ u64 timestamp;
+
+ /*
+ * These fields let us detect when two contexts have both
+ * been cloned (inherited) from a common ancestor.
+ */
+ struct perf_counter_context *parent_ctx;
+ u64 parent_gen;
+ u64 generation;
+ int pin_count;
+ struct rcu_head rcu_head;
+};
+
+/**
+ * struct perf_counter_cpu_context - per cpu counter context structure
+ */
+struct perf_cpu_context {
+ struct perf_counter_context ctx;
+ struct perf_counter_context *task_ctx;
+ int active_oncpu;
+ int max_pertask;
+ int exclusive;
+
+ /*
+ * Recursion avoidance:
+ *
+ * task, softirq, irq, nmi context
+ */
+ int recursion[4];
+};
+
+#ifdef CONFIG_PERF_COUNTERS
+
+/*
+ * Set by architecture code:
+ */
+extern int perf_max_counters;
+
+extern const struct pmu *hw_perf_counter_init(struct perf_counter *counter);
+
+extern void perf_counter_task_sched_in(struct task_struct *task, int cpu);
+extern void perf_counter_task_sched_out(struct task_struct *task,
+ struct task_struct *next, int cpu);
+extern void perf_counter_task_tick(struct task_struct *task, int cpu);
+extern int perf_counter_init_task(struct task_struct *child);
+extern void perf_counter_exit_task(struct task_struct *child);
+extern void perf_counter_free_task(struct task_struct *task);
+extern void perf_counter_do_pending(void);
+extern void perf_counter_print_debug(void);
+extern void __perf_disable(void);
+extern bool __perf_enable(void);
+extern void perf_disable(void);
+extern void perf_enable(void);
+extern int perf_counter_task_disable(void);
+extern int perf_counter_task_enable(void);
+extern int hw_perf_group_sched_in(struct perf_counter *group_leader,
+ struct perf_cpu_context *cpuctx,
+ struct perf_counter_context *ctx, int cpu);
+extern void perf_counter_update_userpage(struct perf_counter *counter);
+
+struct perf_sample_data {
+ struct pt_regs *regs;
+ u64 addr;
+ u64 period;
+};
+
+extern int perf_counter_overflow(struct perf_counter *counter, int nmi,
+ struct perf_sample_data *data);
+
+/*
+ * Return 1 for a software counter, 0 for a hardware counter
+ */
+static inline int is_software_counter(struct perf_counter *counter)
+{
+ return (counter->attr.type != PERF_TYPE_RAW) &&
+ (counter->attr.type != PERF_TYPE_HARDWARE);
+}
+
+extern void perf_swcounter_event(u32, u64, int, struct pt_regs *, u64);
+
+extern void __perf_counter_mmap(struct vm_area_struct *vma);
+
+static inline void perf_counter_mmap(struct vm_area_struct *vma)
+{
+ if (vma->vm_flags & VM_EXEC)
+ __perf_counter_mmap(vma);
+}
+
+extern void perf_counter_comm(struct task_struct *tsk);
+extern void perf_counter_fork(struct task_struct *tsk);
+
+extern void perf_counter_task_migration(struct task_struct *task, int cpu);
+
+#define MAX_STACK_DEPTH 255
+
+struct perf_callchain_entry {
+ u16 nr;
+ u16 hv;
+ u16 kernel;
+ u16 user;
+ u64 ip[MAX_STACK_DEPTH];
+};
+
+extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
+
+extern int sysctl_perf_counter_paranoid;
+extern int sysctl_perf_counter_mlock;
+extern int sysctl_perf_counter_sample_rate;
+
+extern void perf_counter_init(void);
+
+#ifndef perf_misc_flags
+#define perf_misc_flags(regs) (user_mode(regs) ? PERF_EVENT_MISC_USER : \
+ PERF_EVENT_MISC_KERNEL)
+#define perf_instruction_pointer(regs) instruction_pointer(regs)
+#endif
+
+#else
+static inline void
+perf_counter_task_sched_in(struct task_struct *task, int cpu) { }
+static inline void
+perf_counter_task_sched_out(struct task_struct *task,
+ struct task_struct *next, int cpu) { }
+static inline void
+perf_counter_task_tick(struct task_struct *task, int cpu) { }
+static inline int perf_counter_init_task(struct task_struct *child) { return 0; }
+static inline void perf_counter_exit_task(struct task_struct *child) { }
+static inline void perf_counter_free_task(struct task_struct *task) { }
+static inline void perf_counter_do_pending(void) { }
+static inline void perf_counter_print_debug(void) { }
+static inline void perf_disable(void) { }
+static inline void perf_enable(void) { }
+static inline int perf_counter_task_disable(void) { return -EINVAL; }
+static inline int perf_counter_task_enable(void) { return -EINVAL; }
+
+static inline void
+perf_swcounter_event(u32 event, u64 nr, int nmi,
+ struct pt_regs *regs, u64 addr) { }
+
+static inline void perf_counter_mmap(struct vm_area_struct *vma) { }
+static inline void perf_counter_comm(struct task_struct *tsk) { }
+static inline void perf_counter_fork(struct task_struct *tsk) { }
+static inline void perf_counter_init(void) { }
+static inline void perf_counter_task_migration(struct task_struct *task,
+ int cpu) { }
+#endif
+
+#endif /* __KERNEL__ */
+#endif /* _LINUX_PERF_COUNTER_H */
#define PR_SET_TIMERSLACK 29
#define PR_GET_TIMERSLACK 30
+#define PR_TASK_PERF_COUNTERS_DISABLE 31
+#define PR_TASK_PERF_COUNTERS_ENABLE 32
+
#endif /* _LINUX_PRCTL_H */
struct task_struct *new_parent);
extern void __ptrace_unlink(struct task_struct *child);
extern void exit_ptrace(struct task_struct *tracer);
-extern void ptrace_fork(struct task_struct *task, unsigned long clone_flags);
#define PTRACE_MODE_READ 1
#define PTRACE_MODE_ATTACH 2
/* Returns 0 on success, -errno on denial. */
#define arch_ptrace_untrace(task) do { } while (0)
#endif
-#ifndef arch_ptrace_fork
-/*
- * Do machine-specific work to initialize a new task.
- *
- * This is called from copy_process().
- */
-#define arch_ptrace_fork(child, clone_flags) do { } while (0)
-#endif
-
extern int task_current_syscall(struct task_struct *target, long *callno,
unsigned long args[6], unsigned int maxargs,
unsigned long *sp, unsigned long *pc);
at->prev = last;
}
+/**
+ * list_entry_rcu - get the struct for this entry
+ * @ptr: the &struct list_head pointer.
+ * @type: the type of the struct this is embedded in.
+ * @member: the name of the list_struct within the struct.
+ *
+ * This primitive may safely run concurrently with the _rcu list-mutation
+ * primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock().
+ */
+#define list_entry_rcu(ptr, type, member) \
+ container_of(rcu_dereference(ptr), type, member)
+
+/**
+ * list_first_entry_rcu - get the first element from a list
+ * @ptr: the list head to take the element from.
+ * @type: the type of the struct this is embedded in.
+ * @member: the name of the list_struct within the struct.
+ *
+ * Note, that list is expected to be not empty.
+ *
+ * This primitive may safely run concurrently with the _rcu list-mutation
+ * primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock().
+ */
+#define list_first_entry_rcu(ptr, type, member) \
+ list_entry_rcu((ptr)->next, type, member)
+
#define __list_for_each_rcu(pos, head) \
for (pos = rcu_dereference((head)->next); \
pos != (head); \
* as long as the traversal is guarded by rcu_read_lock().
*/
#define list_for_each_entry_rcu(pos, head, member) \
- for (pos = list_entry(rcu_dereference((head)->next), typeof(*pos), member); \
+ for (pos = list_entry_rcu((head)->next, typeof(*pos), member); \
prefetch(pos->member.next), &pos->member != (head); \
- pos = list_entry(rcu_dereference(pos->member.next), typeof(*pos), member))
+ pos = list_entry_rcu(pos->member.next, typeof(*pos), member))
/**
unsigned long offline_fqs; /* Kicked due to being offline. */
unsigned long resched_ipi; /* Sent a resched IPI. */
- /* 5) For future __rcu_pending statistics. */
+ /* 5) __rcu_pending() statistics. */
long n_rcu_pending; /* rcu_pending() calls since boot. */
+ long n_rp_qs_pending;
+ long n_rp_cb_ready;
+ long n_rp_cpu_needs_gp;
+ long n_rp_gp_completed;
+ long n_rp_gp_started;
+ long n_rp_need_fqs;
+ long n_rp_need_nothing;
int cpu;
};
* Don't refer to this struct directly, use functions below.
*/
struct ring_buffer_event {
- u32 type:2, len:3, time_delta:27;
+ u32 type_len:5, time_delta:27;
u32 array[];
};
* size is variable depending on how much
* padding is needed
* If time_delta is non zero:
- * everything else same as RINGBUF_TYPE_DATA
+ * array[0] holds the actual length
+ * size = 4 + length (bytes)
*
* @RINGBUF_TYPE_TIME_EXTEND: Extend the time delta
* array[0] = time delta (28 .. 59)
* array[1..2] = tv_sec
* size = 16 bytes
*
- * @RINGBUF_TYPE_DATA: Data record
- * If len is zero:
+ * <= @RINGBUF_TYPE_DATA_TYPE_LEN_MAX:
+ * Data record
+ * If type_len is zero:
* array[0] holds the actual length
* array[1..(length+3)/4] holds data
- * size = 4 + 4 + length (bytes)
+ * size = 4 + length (bytes)
* else
- * length = len << 2
+ * length = type_len << 2
* array[0..(length+3)/4-1] holds data
* size = 4 + length (bytes)
*/
enum ring_buffer_type {
+ RINGBUF_TYPE_DATA_TYPE_LEN_MAX = 28,
RINGBUF_TYPE_PADDING,
RINGBUF_TYPE_TIME_EXTEND,
/* FIXME: RINGBUF_TYPE_TIME_STAMP not implemented */
RINGBUF_TYPE_TIME_STAMP,
- RINGBUF_TYPE_DATA,
};
unsigned ring_buffer_event_length(struct ring_buffer_event *event);
return event->time_delta;
}
+/*
+ * ring_buffer_event_discard can discard any event in the ring buffer.
+ * it is up to the caller to protect against a reader from
+ * consuming it or a writer from wrapping and replacing it.
+ *
+ * No external protection is needed if this is called before
+ * the event is commited. But in that case it would be better to
+ * use ring_buffer_discard_commit.
+ *
+ * Note, if an event that has not been committed is discarded
+ * with ring_buffer_event_discard, it must still be committed.
+ */
void ring_buffer_event_discard(struct ring_buffer_event *event);
+/*
+ * ring_buffer_discard_commit will remove an event that has not
+ * ben committed yet. If this is used, then ring_buffer_unlock_commit
+ * must not be called on the discarded event. This function
+ * will try to remove the event from the ring buffer completely
+ * if another event has not been written after it.
+ *
+ * Example use:
+ *
+ * if (some_condition)
+ * ring_buffer_discard_commit(buffer, event);
+ * else
+ * ring_buffer_unlock_commit(buffer, event);
+ */
+void ring_buffer_discard_commit(struct ring_buffer *buffer,
+ struct ring_buffer_event *event);
+
/*
* size is in bytes for each per CPU buffer.
*/
struct ring_buffer *
-ring_buffer_alloc(unsigned long size, unsigned flags);
+__ring_buffer_alloc(unsigned long size, unsigned flags, struct lock_class_key *key);
+
+/*
+ * Because the ring buffer is generic, if other users of the ring buffer get
+ * traced by ftrace, it can produce lockdep warnings. We need to keep each
+ * ring buffer's lock class separate.
+ */
+#define ring_buffer_alloc(size, flags) \
+({ \
+ static struct lock_class_key __key; \
+ __ring_buffer_alloc((size), (flags), &__key); \
+})
+
void ring_buffer_free(struct ring_buffer *buffer);
int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size);
unsigned long ring_buffer_overruns(struct ring_buffer *buffer);
unsigned long ring_buffer_entries_cpu(struct ring_buffer *buffer, int cpu);
unsigned long ring_buffer_overrun_cpu(struct ring_buffer *buffer, int cpu);
+unsigned long ring_buffer_commit_overrun_cpu(struct ring_buffer *buffer, int cpu);
+unsigned long ring_buffer_nmi_dropped_cpu(struct ring_buffer *buffer, int cpu);
u64 ring_buffer_time_stamp(struct ring_buffer *buffer, int cpu);
void ring_buffer_normalize_time_stamp(struct ring_buffer *buffer,
int ring_buffer_read_page(struct ring_buffer *buffer, void **data_page,
size_t len, int cpu, int full);
+struct trace_seq;
+
+int ring_buffer_print_entry_header(struct trace_seq *s);
+int ring_buffer_print_page_header(struct trace_seq *s);
+
enum ring_buffer_flags {
RB_FL_OVERWRITE = 1 << 0,
};
#include <linux/proportions.h>
#include <linux/seccomp.h>
#include <linux/rcupdate.h>
+#include <linux/rculist.h>
#include <linux/rtmutex.h>
#include <linux/time.h>
struct futex_pi_state;
struct robust_list_head;
struct bio;
-struct bts_tracer;
struct fs_struct;
+struct bts_context;
+struct perf_counter_context;
/*
* List of flags we want to share for kernel threads,
* 11 bit fractions.
*/
extern unsigned long avenrun[]; /* Load averages */
+extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);
#define FSHIFT 11 /* nr of bits of precision */
#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
extern int nr_processes(void);
extern unsigned long nr_running(void);
extern unsigned long nr_uninterruptible(void);
-extern unsigned long nr_active(void);
extern unsigned long nr_iowait(void);
+extern void calc_global_load(void);
+extern u64 cpu_nr_migrations(int cpu);
extern unsigned long get_parent_ip(unsigned long addr);
struct work_struct work;
#endif
#endif
+
+#ifdef CONFIG_PERF_COUNTERS
+ atomic_long_t locked_vm;
+#endif
};
extern int uids_sysfs_init(void);
*/
u32 reciprocal_cpu_power;
- unsigned long cpumask[];
+ /*
+ * The CPUs this group covers.
+ *
+ * NOTE: this field is variable length. (Allocated dynamically
+ * by attaching extra space to the end of the structure,
+ * depending on how many CPUs the kernel has booted up with)
+ *
+ * It is also be embedded into static data structures at build
+ * time. (See 'struct static_sched_group' in kernel/sched.c)
+ */
+ unsigned long cpumask[0];
};
static inline struct cpumask *sched_group_cpus(struct sched_group *sg)
char *name;
#endif
- /* span of all CPUs in this domain */
- unsigned long span[];
+ /*
+ * Span of all CPUs in this domain.
+ *
+ * NOTE: this field is variable length. (Allocated dynamically
+ * by attaching extra space to the end of the structure,
+ * depending on how many CPUs the kernel has booted up with)
+ *
+ * It is also be embedded into static data structures at build
+ * time. (See 'struct static_sched_domain' in kernel/sched.c)
+ */
+ unsigned long span[0];
};
static inline struct cpumask *sched_domain_span(struct sched_domain *sd)
u64 last_wakeup;
u64 avg_overlap;
+ u64 nr_migrations;
+
u64 start_runtime;
u64 avg_wakeup;
- u64 nr_migrations;
#ifdef CONFIG_SCHEDSTATS
u64 wait_start;
struct list_head ptraced;
struct list_head ptrace_entry;
-#ifdef CONFIG_X86_PTRACE_BTS
/*
* This is the tracer handle for the ptrace BTS extension.
* This field actually belongs to the ptracer task.
*/
- struct bts_tracer *bts;
- /*
- * The buffer to hold the BTS data.
- */
- void *bts_buffer;
- size_t bts_size;
-#endif /* CONFIG_X86_PTRACE_BTS */
+ struct bts_context *bts;
/* PID/PID hash table linkage. */
struct pid_link pids[PIDTYPE_MAX];
struct list_head pi_state_list;
struct futex_pi_state *pi_state_cache;
#endif
+#ifdef CONFIG_PERF_COUNTERS
+ struct perf_counter_context *perf_counter_ctxp;
+ struct mutex perf_counter_mutex;
+ struct list_head perf_counter_list;
+#endif
#ifdef CONFIG_NUMA
struct mempolicy *mempolicy;
short il_next;
#ifdef CONFIG_TRACING
/* state flags for use by tracers */
unsigned long trace;
-#endif
+ /* bitmask of trace recursion */
+ unsigned long trace_recursion;
+#endif /* CONFIG_TRACING */
};
/* Future-safe accessor for struct task_struct's cpus_allowed. */
extern char *get_task_comm(char *to, struct task_struct *tsk);
#ifdef CONFIG_SMP
+extern void wait_task_context_switch(struct task_struct *p);
extern unsigned long wait_task_inactive(struct task_struct *, long match_state);
#else
+static inline void wait_task_context_switch(struct task_struct *p) {}
static inline unsigned long wait_task_inactive(struct task_struct *p,
long match_state)
{
}
#endif
-#define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
+#define next_task(p) \
+ list_entry_rcu((p)->tasks.next, struct task_struct, tasks)
#define for_each_process(p) \
for (p = &init_task ; (p = next_task(p)) != &init_task ; )
static inline struct task_struct *next_thread(const struct task_struct *p)
{
- return list_entry(rcu_dereference(p->thread_group.next),
- struct task_struct, thread_group);
+ return list_entry_rcu(p->thread_group.next,
+ struct task_struct, thread_group);
}
static inline int thread_group_empty(struct task_struct *p)
#define TASK_SIZE_OF(tsk) TASK_SIZE
#endif
+/*
+ * Call the function if the target task is executing on a CPU right now:
+ */
+extern void task_oncpu_function_call(struct task_struct *p,
+ void (*func) (void *info), void *info);
+
+
#ifdef CONFIG_MM_OWNER
extern void mm_update_next_owner(struct mm_struct *mm);
extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
extern int next_signal(struct sigpending *pending, sigset_t *mask);
extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p);
extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *);
+extern long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig,
+ siginfo_t *info);
extern long do_sigpending(void __user *, unsigned long);
extern int sigprocmask(int, sigset_t *, sigset_t *);
extern int show_unhandled_signals;
#include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
#include <linux/compiler.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
/* Size description struct for general caches. */
struct cache_sizes {
#include <linux/gfp.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
enum stat_item {
ALLOC_FASTPATH, /* Allocation from cpu slab */
#define __raw_spin_is_locked(lock) ((void)(lock), 0)
/* for sched.c and kernel_lock.c: */
# define __raw_spin_lock(lock) do { (void)(lock); } while (0)
+# define __raw_spin_lock_flags(lock, flags) do { (void)(lock); } while (0)
# define __raw_spin_unlock(lock) do { (void)(lock); } while (0)
# define __raw_spin_trylock(lock) ({ (void)(lock); 1; })
#endif /* DEBUG_SPINLOCK */
extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
phys_addr_t address);
-extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
+extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
+ dma_addr_t address);
extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
struct robust_list_head;
struct getcpu_cache;
struct old_linux_dirent;
+struct perf_counter_attr;
#include <linux/types.h>
#include <linux/aio_abi.h>
int kernel_execve(const char *filename, char *const argv[], char *const envp[]);
+
+asmlinkage long sys_perf_counter_open(
+ const struct perf_counter_attr __user *attr_uptr,
+ pid_t pid, int cpu, int group_fd, unsigned long flags);
#endif
struct {
unsigned long arg0, arg1, arg2, arg3;
};
- /* For futex_wait */
+ /* For futex_wait and futex_wait_requeue_pi */
struct {
u32 *uaddr;
u32 val;
u32 flags;
u32 bitset;
u64 time;
+ u32 *uaddr2;
} futex;
/* For nanosleep */
struct {
--- /dev/null
+#ifndef _LINUX_TRACE_SEQ_H
+#define _LINUX_TRACE_SEQ_H
+
+#include <linux/fs.h>
+
+/*
+ * Trace sequences are used to allow a function to call several other functions
+ * to create a string of data to use (up to a max of PAGE_SIZE.
+ */
+
+struct trace_seq {
+ unsigned char buffer[PAGE_SIZE];
+ unsigned int len;
+ unsigned int readpos;
+};
+
+static inline void
+trace_seq_init(struct trace_seq *s)
+{
+ s->len = 0;
+ s->readpos = 0;
+}
+
+/*
+ * Currently only defined when tracing is enabled.
+ */
+#ifdef CONFIG_TRACING
+extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
+ __attribute__ ((format (printf, 2, 0)));
+extern int
+trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
+extern void trace_print_seq(struct seq_file *m, struct trace_seq *s);
+extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
+ size_t cnt);
+extern int trace_seq_puts(struct trace_seq *s, const char *str);
+extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
+extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
+extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
+ size_t len);
+extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
+extern int trace_seq_path(struct trace_seq *s, struct path *path);
+
+#else /* CONFIG_TRACING */
+static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+{
+ return 0;
+}
+static inline int
+trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
+{
+ return 0;
+}
+
+static inline void trace_print_seq(struct seq_file *m, struct trace_seq *s)
+{
+}
+static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
+ size_t cnt)
+{
+ return 0;
+}
+static inline int trace_seq_puts(struct trace_seq *s, const char *str)
+{
+ return 0;
+}
+static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
+{
+ return 0;
+}
+static inline int
+trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
+{
+ return 0;
+}
+static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
+ size_t len)
+{
+ return 0;
+}
+static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
+{
+ return NULL;
+}
+static inline int trace_seq_path(struct trace_seq *s, struct path *path)
+{
+ return 0;
+}
+#endif /* CONFIG_TRACING */
+
+#endif /* _LINUX_TRACE_SEQ_H */
* Keep in sync with vmlinux.lds.h.
*/
+#ifndef DECLARE_TRACE
+
#define TP_PROTO(args...) args
#define TP_ARGS(args...) args
struct tracepoint *end)
{ }
#endif /* CONFIG_TRACEPOINTS */
+#endif /* DECLARE_TRACE */
/*
* Connect a probe to a tracepoint.
}
#define PARAMS(args...) args
-#define TRACE_FORMAT(name, proto, args, fmt) \
- DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
-
+#ifndef TRACE_EVENT
/*
* For use with the TRACE_EVENT macro:
*
#define TRACE_EVENT(name, proto, args, struct, assign, print) \
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#endif
#endif
list_del(&old->task_list);
}
-void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
- int nr_exclusive, int sync, void *key);
void __wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
void __wake_up_locked_key(wait_queue_head_t *q, unsigned int mode, void *key);
void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode, int nr,
+++ /dev/null
-#ifndef _TRACE_BLOCK_H
-#define _TRACE_BLOCK_H
-
-#include <linux/blkdev.h>
-#include <linux/tracepoint.h>
-
-DECLARE_TRACE(block_rq_abort,
- TP_PROTO(struct request_queue *q, struct request *rq),
- TP_ARGS(q, rq));
-
-DECLARE_TRACE(block_rq_insert,
- TP_PROTO(struct request_queue *q, struct request *rq),
- TP_ARGS(q, rq));
-
-DECLARE_TRACE(block_rq_issue,
- TP_PROTO(struct request_queue *q, struct request *rq),
- TP_ARGS(q, rq));
-
-DECLARE_TRACE(block_rq_requeue,
- TP_PROTO(struct request_queue *q, struct request *rq),
- TP_ARGS(q, rq));
-
-DECLARE_TRACE(block_rq_complete,
- TP_PROTO(struct request_queue *q, struct request *rq),
- TP_ARGS(q, rq));
-
-DECLARE_TRACE(block_bio_bounce,
- TP_PROTO(struct request_queue *q, struct bio *bio),
- TP_ARGS(q, bio));
-
-DECLARE_TRACE(block_bio_complete,
- TP_PROTO(struct request_queue *q, struct bio *bio),
- TP_ARGS(q, bio));
-
-DECLARE_TRACE(block_bio_backmerge,
- TP_PROTO(struct request_queue *q, struct bio *bio),
- TP_ARGS(q, bio));
-
-DECLARE_TRACE(block_bio_frontmerge,
- TP_PROTO(struct request_queue *q, struct bio *bio),
- TP_ARGS(q, bio));
-
-DECLARE_TRACE(block_bio_queue,
- TP_PROTO(struct request_queue *q, struct bio *bio),
- TP_ARGS(q, bio));
-
-DECLARE_TRACE(block_getrq,
- TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
- TP_ARGS(q, bio, rw));
-
-DECLARE_TRACE(block_sleeprq,
- TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
- TP_ARGS(q, bio, rw));
-
-DECLARE_TRACE(block_plug,
- TP_PROTO(struct request_queue *q),
- TP_ARGS(q));
-
-DECLARE_TRACE(block_unplug_timer,
- TP_PROTO(struct request_queue *q),
- TP_ARGS(q));
-
-DECLARE_TRACE(block_unplug_io,
- TP_PROTO(struct request_queue *q),
- TP_ARGS(q));
-
-DECLARE_TRACE(block_split,
- TP_PROTO(struct request_queue *q, struct bio *bio, unsigned int pdu),
- TP_ARGS(q, bio, pdu));
-
-DECLARE_TRACE(block_remap,
- TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
- sector_t from, sector_t to),
- TP_ARGS(q, bio, dev, from, to));
-
-#endif
--- /dev/null
+/*
+ * Trace files that want to automate creationg of all tracepoints defined
+ * in their file should include this file. The following are macros that the
+ * trace file may define:
+ *
+ * TRACE_SYSTEM defines the system the tracepoint is for
+ *
+ * TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
+ * This macro may be defined to tell define_trace.h what file to include.
+ * Note, leave off the ".h".
+ *
+ * TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
+ * then this macro can define the path to use. Note, the path is relative to
+ * define_trace.h, not the file including it. Full path names for out of tree
+ * modules must be used.
+ */
+
+#ifdef CREATE_TRACE_POINTS
+
+/* Prevent recursion */
+#undef CREATE_TRACE_POINTS
+
+#include <linux/stringify.h>
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
+ DEFINE_TRACE(name)
+
+#undef DECLARE_TRACE
+#define DECLARE_TRACE(name, proto, args) \
+ DEFINE_TRACE(name)
+
+#undef TRACE_INCLUDE
+#undef __TRACE_INCLUDE
+
+#ifndef TRACE_INCLUDE_FILE
+# define TRACE_INCLUDE_FILE TRACE_SYSTEM
+# define UNDEF_TRACE_INCLUDE_FILE
+#endif
+
+#ifndef TRACE_INCLUDE_PATH
+# define __TRACE_INCLUDE(system) <trace/events/system.h>
+# define UNDEF_TRACE_INCLUDE_PATH
+#else
+# define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
+#endif
+
+# define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
+
+/* Let the trace headers be reread */
+#define TRACE_HEADER_MULTI_READ
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#ifdef CONFIG_EVENT_TRACING
+#include <trace/ftrace.h>
+#endif
+
+#undef TRACE_HEADER_MULTI_READ
+
+/* Only undef what we defined in this file */
+#ifdef UNDEF_TRACE_INCLUDE_FILE
+# undef TRACE_INCLUDE_FILE
+# undef UNDEF_TRACE_INCLUDE_FILE
+#endif
+
+#ifdef UNDEF_TRACE_INCLUDE_PATH
+# undef TRACE_INCLUDE_PATH
+# undef UNDEF_TRACE_INCLUDE_PATH
+#endif
+
+/* We may be processing more files */
+#define CREATE_TRACE_POINTS
+
+#endif /* CREATE_TRACE_POINTS */
--- /dev/null
+#if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_BLOCK_H
+
+#include <linux/blktrace_api.h>
+#include <linux/blkdev.h>
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM block
+
+TRACE_EVENT(block_rq_abort,
+
+ TP_PROTO(struct request_queue *q, struct request *rq),
+
+ TP_ARGS(q, rq),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __field( int, errors )
+ __array( char, rwbs, 6 )
+ __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
+ __entry->sector = blk_pc_request(rq) ? 0 : rq->hard_sector;
+ __entry->nr_sector = blk_pc_request(rq) ?
+ 0 : rq->hard_nr_sectors;
+ __entry->errors = rq->errors;
+
+ blk_fill_rwbs_rq(__entry->rwbs, rq);
+ blk_dump_cmd(__get_str(cmd), rq);
+ ),
+
+ TP_printk("%d,%d %s (%s) %llu + %u [%d]",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->rwbs, __get_str(cmd),
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->errors)
+);
+
+TRACE_EVENT(block_rq_insert,
+
+ TP_PROTO(struct request_queue *q, struct request *rq),
+
+ TP_ARGS(q, rq),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __field( unsigned int, bytes )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
+ __entry->sector = blk_pc_request(rq) ? 0 : rq->hard_sector;
+ __entry->nr_sector = blk_pc_request(rq) ?
+ 0 : rq->hard_nr_sectors;
+ __entry->bytes = blk_pc_request(rq) ? rq->data_len : 0;
+
+ blk_fill_rwbs_rq(__entry->rwbs, rq);
+ blk_dump_cmd(__get_str(cmd), rq);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->rwbs, __entry->bytes, __get_str(cmd),
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_rq_issue,
+
+ TP_PROTO(struct request_queue *q, struct request *rq),
+
+ TP_ARGS(q, rq),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __field( unsigned int, bytes )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
+ __entry->sector = blk_pc_request(rq) ? 0 : rq->hard_sector;
+ __entry->nr_sector = blk_pc_request(rq) ?
+ 0 : rq->hard_nr_sectors;
+ __entry->bytes = blk_pc_request(rq) ? rq->data_len : 0;
+
+ blk_fill_rwbs_rq(__entry->rwbs, rq);
+ blk_dump_cmd(__get_str(cmd), rq);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->rwbs, __entry->bytes, __get_str(cmd),
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_rq_requeue,
+
+ TP_PROTO(struct request_queue *q, struct request *rq),
+
+ TP_ARGS(q, rq),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __field( int, errors )
+ __array( char, rwbs, 6 )
+ __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
+ __entry->sector = blk_pc_request(rq) ? 0 : rq->hard_sector;
+ __entry->nr_sector = blk_pc_request(rq) ?
+ 0 : rq->hard_nr_sectors;
+ __entry->errors = rq->errors;
+
+ blk_fill_rwbs_rq(__entry->rwbs, rq);
+ blk_dump_cmd(__get_str(cmd), rq);
+ ),
+
+ TP_printk("%d,%d %s (%s) %llu + %u [%d]",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->rwbs, __get_str(cmd),
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->errors)
+);
+
+TRACE_EVENT(block_rq_complete,
+
+ TP_PROTO(struct request_queue *q, struct request *rq),
+
+ TP_ARGS(q, rq),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __field( int, errors )
+ __array( char, rwbs, 6 )
+ __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
+ __entry->sector = blk_pc_request(rq) ? 0 : rq->hard_sector;
+ __entry->nr_sector = blk_pc_request(rq) ?
+ 0 : rq->hard_nr_sectors;
+ __entry->errors = rq->errors;
+
+ blk_fill_rwbs_rq(__entry->rwbs, rq);
+ blk_dump_cmd(__get_str(cmd), rq);
+ ),
+
+ TP_printk("%d,%d %s (%s) %llu + %u [%d]",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->rwbs, __get_str(cmd),
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->errors)
+);
+TRACE_EVENT(block_bio_bounce,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio),
+
+ TP_ARGS(q, bio),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->sector = bio->bi_sector;
+ __entry->nr_sector = bio->bi_size >> 9;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_bio_complete,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio),
+
+ TP_ARGS(q, bio),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned, nr_sector )
+ __field( int, error )
+ __array( char, rwbs, 6 )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->sector = bio->bi_sector;
+ __entry->nr_sector = bio->bi_size >> 9;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u [%d]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->error)
+);
+
+TRACE_EVENT(block_bio_backmerge,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio),
+
+ TP_ARGS(q, bio),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->sector = bio->bi_sector;
+ __entry->nr_sector = bio->bi_size >> 9;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_bio_frontmerge,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio),
+
+ TP_ARGS(q, bio),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned, nr_sector )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->sector = bio->bi_sector;
+ __entry->nr_sector = bio->bi_size >> 9;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_bio_queue,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio),
+
+ TP_ARGS(q, bio),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->sector = bio->bi_sector;
+ __entry->nr_sector = bio->bi_size >> 9;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_getrq,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
+
+ TP_ARGS(q, bio, rw),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
+ __entry->sector = bio ? bio->bi_sector : 0;
+ __entry->nr_sector = bio ? bio->bi_size >> 9 : 0;
+ blk_fill_rwbs(__entry->rwbs,
+ bio ? bio->bi_rw : 0, __entry->nr_sector);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_sleeprq,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
+
+ TP_ARGS(q, bio, rw),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
+ __entry->sector = bio ? bio->bi_sector : 0;
+ __entry->nr_sector = bio ? bio->bi_size >> 9 : 0;
+ blk_fill_rwbs(__entry->rwbs,
+ bio ? bio->bi_rw : 0, __entry->nr_sector);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector, __entry->comm)
+);
+
+TRACE_EVENT(block_plug,
+
+ TP_PROTO(struct request_queue *q),
+
+ TP_ARGS(q),
+
+ TP_STRUCT__entry(
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("[%s]", __entry->comm)
+);
+
+TRACE_EVENT(block_unplug_timer,
+
+ TP_PROTO(struct request_queue *q),
+
+ TP_ARGS(q),
+
+ TP_STRUCT__entry(
+ __field( int, nr_rq )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->nr_rq = q->rq.count[READ] + q->rq.count[WRITE];
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
+);
+
+TRACE_EVENT(block_unplug_io,
+
+ TP_PROTO(struct request_queue *q),
+
+ TP_ARGS(q),
+
+ TP_STRUCT__entry(
+ __field( int, nr_rq )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->nr_rq = q->rq.count[READ] + q->rq.count[WRITE];
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
+);
+
+TRACE_EVENT(block_split,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio,
+ unsigned int new_sector),
+
+ TP_ARGS(q, bio, new_sector),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( sector_t, new_sector )
+ __array( char, rwbs, 6 )
+ __array( char, comm, TASK_COMM_LEN )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->sector = bio->bi_sector;
+ __entry->new_sector = new_sector;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ ),
+
+ TP_printk("%d,%d %s %llu / %llu [%s]",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ (unsigned long long)__entry->new_sector,
+ __entry->comm)
+);
+
+TRACE_EVENT(block_remap,
+
+ TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
+ sector_t from),
+
+ TP_ARGS(q, bio, dev, from),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sector )
+ __field( dev_t, old_dev )
+ __field( sector_t, old_sector )
+ __array( char, rwbs, 6 )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->sector = bio->bi_sector;
+ __entry->nr_sector = bio->bi_size >> 9;
+ __entry->old_dev = dev;
+ __entry->old_sector = from;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sector,
+ MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
+ (unsigned long long)__entry->old_sector)
+);
+
+#endif /* _TRACE_BLOCK_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
+
--- /dev/null
+#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IRQ_H
+
+#include <linux/tracepoint.h>
+#include <linux/interrupt.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM irq
+
+#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
+#define show_softirq_name(val) \
+ __print_symbolic(val, \
+ softirq_name(HI), \
+ softirq_name(TIMER), \
+ softirq_name(NET_TX), \
+ softirq_name(NET_RX), \
+ softirq_name(BLOCK), \
+ softirq_name(TASKLET), \
+ softirq_name(SCHED), \
+ softirq_name(HRTIMER), \
+ softirq_name(RCU))
+
+/**
+ * irq_handler_entry - called immediately before the irq action handler
+ * @irq: irq number
+ * @action: pointer to struct irqaction
+ *
+ * The struct irqaction pointed to by @action contains various
+ * information about the handler, including the device name,
+ * @action->name, and the device id, @action->dev_id. When used in
+ * conjunction with the irq_handler_exit tracepoint, we can figure
+ * out irq handler latencies.
+ */
+TRACE_EVENT(irq_handler_entry,
+
+ TP_PROTO(int irq, struct irqaction *action),
+
+ TP_ARGS(irq, action),
+
+ TP_STRUCT__entry(
+ __field( int, irq )
+ __string( name, action->name )
+ ),
+
+ TP_fast_assign(
+ __entry->irq = irq;
+ __assign_str(name, action->name);
+ ),
+
+ TP_printk("irq=%d handler=%s", __entry->irq, __get_str(name))
+);
+
+/**
+ * irq_handler_exit - called immediately after the irq action handler returns
+ * @irq: irq number
+ * @action: pointer to struct irqaction
+ * @ret: return value
+ *
+ * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
+ * @action->handler scuccessully handled this irq. Otherwise, the irq might be
+ * a shared irq line, or the irq was not handled successfully. Can be used in
+ * conjunction with the irq_handler_entry to understand irq handler latencies.
+ */
+TRACE_EVENT(irq_handler_exit,
+
+ TP_PROTO(int irq, struct irqaction *action, int ret),
+
+ TP_ARGS(irq, action, ret),
+
+ TP_STRUCT__entry(
+ __field( int, irq )
+ __field( int, ret )
+ ),
+
+ TP_fast_assign(
+ __entry->irq = irq;
+ __entry->ret = ret;
+ ),
+
+ TP_printk("irq=%d return=%s",
+ __entry->irq, __entry->ret ? "handled" : "unhandled")
+);
+
+/**
+ * softirq_entry - called immediately before the softirq handler
+ * @h: pointer to struct softirq_action
+ * @vec: pointer to first struct softirq_action in softirq_vec array
+ *
+ * The @h parameter, contains a pointer to the struct softirq_action
+ * which has a pointer to the action handler that is called. By subtracting
+ * the @vec pointer from the @h pointer, we can determine the softirq
+ * number. Also, when used in combination with the softirq_exit tracepoint
+ * we can determine the softirq latency.
+ */
+TRACE_EVENT(softirq_entry,
+
+ TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
+
+ TP_ARGS(h, vec),
+
+ TP_STRUCT__entry(
+ __field( int, vec )
+ ),
+
+ TP_fast_assign(
+ __entry->vec = (int)(h - vec);
+ ),
+
+ TP_printk("softirq=%d action=%s", __entry->vec,
+ show_softirq_name(__entry->vec))
+);
+
+/**
+ * softirq_exit - called immediately after the softirq handler returns
+ * @h: pointer to struct softirq_action
+ * @vec: pointer to first struct softirq_action in softirq_vec array
+ *
+ * The @h parameter contains a pointer to the struct softirq_action
+ * that has handled the softirq. By subtracting the @vec pointer from
+ * the @h pointer, we can determine the softirq number. Also, when used in
+ * combination with the softirq_entry tracepoint we can determine the softirq
+ * latency.
+ */
+TRACE_EVENT(softirq_exit,
+
+ TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
+
+ TP_ARGS(h, vec),
+
+ TP_STRUCT__entry(
+ __field( int, vec )
+ ),
+
+ TP_fast_assign(
+ __entry->vec = (int)(h - vec);
+ ),
+
+ TP_printk("softirq=%d action=%s", __entry->vec,
+ show_softirq_name(__entry->vec))
+);
+
+#endif /* _TRACE_IRQ_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
--- /dev/null
+#if !defined(_TRACE_KMEM_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_KMEM_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM kmem
+
+/*
+ * The order of these masks is important. Matching masks will be seen
+ * first and the left over flags will end up showing by themselves.
+ *
+ * For example, if we have GFP_KERNEL before GFP_USER we wil get:
+ *
+ * GFP_KERNEL|GFP_HARDWALL
+ *
+ * Thus most bits set go first.
+ */
+#define show_gfp_flags(flags) \
+ (flags) ? __print_flags(flags, "|", \
+ {(unsigned long)GFP_HIGHUSER_MOVABLE, "GFP_HIGHUSER_MOVABLE"}, \
+ {(unsigned long)GFP_HIGHUSER, "GFP_HIGHUSER"}, \
+ {(unsigned long)GFP_USER, "GFP_USER"}, \
+ {(unsigned long)GFP_TEMPORARY, "GFP_TEMPORARY"}, \
+ {(unsigned long)GFP_KERNEL, "GFP_KERNEL"}, \
+ {(unsigned long)GFP_NOFS, "GFP_NOFS"}, \
+ {(unsigned long)GFP_ATOMIC, "GFP_ATOMIC"}, \
+ {(unsigned long)GFP_NOIO, "GFP_NOIO"}, \
+ {(unsigned long)__GFP_HIGH, "GFP_HIGH"}, \
+ {(unsigned long)__GFP_WAIT, "GFP_WAIT"}, \
+ {(unsigned long)__GFP_IO, "GFP_IO"}, \
+ {(unsigned long)__GFP_COLD, "GFP_COLD"}, \
+ {(unsigned long)__GFP_NOWARN, "GFP_NOWARN"}, \
+ {(unsigned long)__GFP_REPEAT, "GFP_REPEAT"}, \
+ {(unsigned long)__GFP_NOFAIL, "GFP_NOFAIL"}, \
+ {(unsigned long)__GFP_NORETRY, "GFP_NORETRY"}, \
+ {(unsigned long)__GFP_COMP, "GFP_COMP"}, \
+ {(unsigned long)__GFP_ZERO, "GFP_ZERO"}, \
+ {(unsigned long)__GFP_NOMEMALLOC, "GFP_NOMEMALLOC"}, \
+ {(unsigned long)__GFP_HARDWALL, "GFP_HARDWALL"}, \
+ {(unsigned long)__GFP_THISNODE, "GFP_THISNODE"}, \
+ {(unsigned long)__GFP_RECLAIMABLE, "GFP_RECLAIMABLE"}, \
+ {(unsigned long)__GFP_MOVABLE, "GFP_MOVABLE"} \
+ ) : "GFP_NOWAIT"
+
+TRACE_EVENT(kmalloc,
+
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags),
+
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, call_site )
+ __field( const void *, ptr )
+ __field( size_t, bytes_req )
+ __field( size_t, bytes_alloc )
+ __field( gfp_t, gfp_flags )
+ ),
+
+ TP_fast_assign(
+ __entry->call_site = call_site;
+ __entry->ptr = ptr;
+ __entry->bytes_req = bytes_req;
+ __entry->bytes_alloc = bytes_alloc;
+ __entry->gfp_flags = gfp_flags;
+ ),
+
+ TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s",
+ __entry->call_site,
+ __entry->ptr,
+ __entry->bytes_req,
+ __entry->bytes_alloc,
+ show_gfp_flags(__entry->gfp_flags))
+);
+
+TRACE_EVENT(kmem_cache_alloc,
+
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags),
+
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, call_site )
+ __field( const void *, ptr )
+ __field( size_t, bytes_req )
+ __field( size_t, bytes_alloc )
+ __field( gfp_t, gfp_flags )
+ ),
+
+ TP_fast_assign(
+ __entry->call_site = call_site;
+ __entry->ptr = ptr;
+ __entry->bytes_req = bytes_req;
+ __entry->bytes_alloc = bytes_alloc;
+ __entry->gfp_flags = gfp_flags;
+ ),
+
+ TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s",
+ __entry->call_site,
+ __entry->ptr,
+ __entry->bytes_req,
+ __entry->bytes_alloc,
+ show_gfp_flags(__entry->gfp_flags))
+);
+
+TRACE_EVENT(kmalloc_node,
+
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags,
+ int node),
+
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, call_site )
+ __field( const void *, ptr )
+ __field( size_t, bytes_req )
+ __field( size_t, bytes_alloc )
+ __field( gfp_t, gfp_flags )
+ __field( int, node )
+ ),
+
+ TP_fast_assign(
+ __entry->call_site = call_site;
+ __entry->ptr = ptr;
+ __entry->bytes_req = bytes_req;
+ __entry->bytes_alloc = bytes_alloc;
+ __entry->gfp_flags = gfp_flags;
+ __entry->node = node;
+ ),
+
+ TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d",
+ __entry->call_site,
+ __entry->ptr,
+ __entry->bytes_req,
+ __entry->bytes_alloc,
+ show_gfp_flags(__entry->gfp_flags),
+ __entry->node)
+);
+
+TRACE_EVENT(kmem_cache_alloc_node,
+
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags,
+ int node),
+
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, call_site )
+ __field( const void *, ptr )
+ __field( size_t, bytes_req )
+ __field( size_t, bytes_alloc )
+ __field( gfp_t, gfp_flags )
+ __field( int, node )
+ ),
+
+ TP_fast_assign(
+ __entry->call_site = call_site;
+ __entry->ptr = ptr;
+ __entry->bytes_req = bytes_req;
+ __entry->bytes_alloc = bytes_alloc;
+ __entry->gfp_flags = gfp_flags;
+ __entry->node = node;
+ ),
+
+ TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d",
+ __entry->call_site,
+ __entry->ptr,
+ __entry->bytes_req,
+ __entry->bytes_alloc,
+ show_gfp_flags(__entry->gfp_flags),
+ __entry->node)
+);
+
+TRACE_EVENT(kfree,
+
+ TP_PROTO(unsigned long call_site, const void *ptr),
+
+ TP_ARGS(call_site, ptr),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, call_site )
+ __field( const void *, ptr )
+ ),
+
+ TP_fast_assign(
+ __entry->call_site = call_site;
+ __entry->ptr = ptr;
+ ),
+
+ TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr)
+);
+
+TRACE_EVENT(kmem_cache_free,
+
+ TP_PROTO(unsigned long call_site, const void *ptr),
+
+ TP_ARGS(call_site, ptr),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, call_site )
+ __field( const void *, ptr )
+ ),
+
+ TP_fast_assign(
+ __entry->call_site = call_site;
+ __entry->ptr = ptr;
+ ),
+
+ TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr)
+);
+#endif /* _TRACE_KMEM_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
--- /dev/null
+#if !defined(_TRACE_LOCKDEP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_LOCKDEP_H
+
+#include <linux/lockdep.h>
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM lockdep
+
+#ifdef CONFIG_LOCKDEP
+
+TRACE_EVENT(lock_acquire,
+
+ TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
+ int trylock, int read, int check,
+ struct lockdep_map *next_lock, unsigned long ip),
+
+ TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, flags)
+ __string(name, lock->name)
+ ),
+
+ TP_fast_assign(
+ __entry->flags = (trylock ? 1 : 0) | (read ? 2 : 0);
+ __assign_str(name, lock->name);
+ ),
+
+ TP_printk("%s%s%s", (__entry->flags & 1) ? "try " : "",
+ (__entry->flags & 2) ? "read " : "",
+ __get_str(name))
+);
+
+TRACE_EVENT(lock_release,
+
+ TP_PROTO(struct lockdep_map *lock, int nested, unsigned long ip),
+
+ TP_ARGS(lock, nested, ip),
+
+ TP_STRUCT__entry(
+ __string(name, lock->name)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, lock->name);
+ ),
+
+ TP_printk("%s", __get_str(name))
+);
+
+#ifdef CONFIG_LOCK_STAT
+
+TRACE_EVENT(lock_contended,
+
+ TP_PROTO(struct lockdep_map *lock, unsigned long ip),
+
+ TP_ARGS(lock, ip),
+
+ TP_STRUCT__entry(
+ __string(name, lock->name)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, lock->name);
+ ),
+
+ TP_printk("%s", __get_str(name))
+);
+
+TRACE_EVENT(lock_acquired,
+ TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
+
+ TP_ARGS(lock, ip, waittime),
+
+ TP_STRUCT__entry(
+ __string(name, lock->name)
+ __field(unsigned long, wait_usec)
+ __field(unsigned long, wait_nsec_rem)
+ ),
+ TP_fast_assign(
+ __assign_str(name, lock->name);
+ __entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
+ __entry->wait_usec = (unsigned long) waittime;
+ ),
+ TP_printk("%s (%lu.%03lu us)", __get_str(name), __entry->wait_usec,
+ __entry->wait_nsec_rem)
+);
+
+#endif
+#endif
+
+#endif /* _TRACE_LOCKDEP_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
+#if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_SCHED_H
-/* use <trace/sched.h> instead */
-#ifndef TRACE_EVENT
-# error Do not include this file directly.
-# error Unless you know what you are doing.
-#endif
+#include <linux/sched.h>
+#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM sched
__array( char, prev_comm, TASK_COMM_LEN )
__field( pid_t, prev_pid )
__field( int, prev_prio )
+ __field( long, prev_state )
__array( char, next_comm, TASK_COMM_LEN )
__field( pid_t, next_pid )
__field( int, next_prio )
memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
__entry->prev_pid = prev->pid;
__entry->prev_prio = prev->prio;
+ __entry->prev_state = prev->state;
memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
__entry->next_pid = next->pid;
__entry->next_prio = next->prio;
),
- TP_printk("task %s:%d [%d] ==> %s:%d [%d]",
+ TP_printk("task %s:%d [%d] (%s) ==> %s:%d [%d]",
__entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
+ __entry->prev_state ?
+ __print_flags(__entry->prev_state, "|",
+ { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" },
+ { 16, "Z" }, { 32, "X" }, { 64, "x" },
+ { 128, "W" }) : "R",
__entry->next_comm, __entry->next_pid, __entry->next_prio)
);
*/
TRACE_EVENT(sched_migrate_task,
- TP_PROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
+ TP_PROTO(struct task_struct *p, int dest_cpu),
- TP_ARGS(p, orig_cpu, dest_cpu),
+ TP_ARGS(p, dest_cpu),
TP_STRUCT__entry(
__array( char, comm, TASK_COMM_LEN )
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
__entry->pid = p->pid;
__entry->prio = p->prio;
- __entry->orig_cpu = orig_cpu;
+ __entry->orig_cpu = task_cpu(p);
__entry->dest_cpu = dest_cpu;
),
__entry->sig, __entry->comm, __entry->pid)
);
-#undef TRACE_SYSTEM
+#endif /* _TRACE_SCHED_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
--- /dev/null
+#if !defined(_TRACE_SKB_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_SKB_H
+
+#include <linux/skbuff.h>
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM skb
+
+/*
+ * Tracepoint for free an sk_buff:
+ */
+TRACE_EVENT(kfree_skb,
+
+ TP_PROTO(struct sk_buff *skb, void *location),
+
+ TP_ARGS(skb, location),
+
+ TP_STRUCT__entry(
+ __field( void *, skbaddr )
+ __field( unsigned short, protocol )
+ __field( void *, location )
+ ),
+
+ TP_fast_assign(
+ __entry->skbaddr = skb;
+ if (skb) {
+ __entry->protocol = ntohs(skb->protocol);
+ }
+ __entry->location = location;
+ ),
+
+ TP_printk("skbaddr=%p protocol=%u location=%p",
+ __entry->skbaddr, __entry->protocol, __entry->location)
+);
+
+#endif /* _TRACE_SKB_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
--- /dev/null
+#if !defined(_TRACE_WORKQUEUE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_WORKQUEUE_H
+
+#include <linux/workqueue.h>
+#include <linux/sched.h>
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM workqueue
+
+TRACE_EVENT(workqueue_insertion,
+
+ TP_PROTO(struct task_struct *wq_thread, struct work_struct *work),
+
+ TP_ARGS(wq_thread, work),
+
+ TP_STRUCT__entry(
+ __array(char, thread_comm, TASK_COMM_LEN)
+ __field(pid_t, thread_pid)
+ __field(work_func_t, func)
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->thread_comm, wq_thread->comm, TASK_COMM_LEN);
+ __entry->thread_pid = wq_thread->pid;
+ __entry->func = work->func;
+ ),
+
+ TP_printk("thread=%s:%d func=%pF", __entry->thread_comm,
+ __entry->thread_pid, __entry->func)
+);
+
+TRACE_EVENT(workqueue_execution,
+
+ TP_PROTO(struct task_struct *wq_thread, struct work_struct *work),
+
+ TP_ARGS(wq_thread, work),
+
+ TP_STRUCT__entry(
+ __array(char, thread_comm, TASK_COMM_LEN)
+ __field(pid_t, thread_pid)
+ __field(work_func_t, func)
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->thread_comm, wq_thread->comm, TASK_COMM_LEN);
+ __entry->thread_pid = wq_thread->pid;
+ __entry->func = work->func;
+ ),
+
+ TP_printk("thread=%s:%d func=%pF", __entry->thread_comm,
+ __entry->thread_pid, __entry->func)
+);
+
+/* Trace the creation of one workqueue thread on a cpu */
+TRACE_EVENT(workqueue_creation,
+
+ TP_PROTO(struct task_struct *wq_thread, int cpu),
+
+ TP_ARGS(wq_thread, cpu),
+
+ TP_STRUCT__entry(
+ __array(char, thread_comm, TASK_COMM_LEN)
+ __field(pid_t, thread_pid)
+ __field(int, cpu)
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->thread_comm, wq_thread->comm, TASK_COMM_LEN);
+ __entry->thread_pid = wq_thread->pid;
+ __entry->cpu = cpu;
+ ),
+
+ TP_printk("thread=%s:%d cpu=%d", __entry->thread_comm,
+ __entry->thread_pid, __entry->cpu)
+);
+
+TRACE_EVENT(workqueue_destruction,
+
+ TP_PROTO(struct task_struct *wq_thread),
+
+ TP_ARGS(wq_thread),
+
+ TP_STRUCT__entry(
+ __array(char, thread_comm, TASK_COMM_LEN)
+ __field(pid_t, thread_pid)
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->thread_comm, wq_thread->comm, TASK_COMM_LEN);
+ __entry->thread_pid = wq_thread->pid;
+ ),
+
+ TP_printk("thread=%s:%d", __entry->thread_comm, __entry->thread_pid)
+);
+
+#endif /* _TRACE_WORKQUEUE_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
--- /dev/null
+/*
+ * Stage 1 of the trace events.
+ *
+ * Override the macros in <trace/trace_events.h> to include the following:
+ *
+ * struct ftrace_raw_<call> {
+ * struct trace_entry ent;
+ * <type> <item>;
+ * <type2> <item2>[<len>];
+ * [...]
+ * };
+ *
+ * The <type> <item> is created by the __field(type, item) macro or
+ * the __array(type2, item2, len) macro.
+ * We simply do "type item;", and that will create the fields
+ * in the structure.
+ */
+
+#include <linux/ftrace_event.h>
+
+#undef __field
+#define __field(type, item) type item;
+
+#undef __array
+#define __array(type, item, len) type item[len];
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) unsigned short __data_loc_##item;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
+ struct ftrace_raw_##name { \
+ struct trace_entry ent; \
+ tstruct \
+ char __data[0]; \
+ }; \
+ static struct ftrace_event_call event_##name
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+
+/*
+ * Stage 2 of the trace events.
+ *
+ * Include the following:
+ *
+ * struct ftrace_data_offsets_<call> {
+ * int <item1>;
+ * int <item2>;
+ * [...]
+ * };
+ *
+ * The __dynamic_array() macro will create each int <item>, this is
+ * to keep the offset of each array from the beginning of the event.
+ */
+
+#undef __field
+#define __field(type, item);
+
+#undef __array
+#define __array(type, item, len)
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) int item;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
+ struct ftrace_data_offsets_##call { \
+ tstruct; \
+ };
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Setup the showing format of trace point.
+ *
+ * int
+ * ftrace_format_##call(struct trace_seq *s)
+ * {
+ * struct ftrace_raw_##call field;
+ * int ret;
+ *
+ * ret = trace_seq_printf(s, #type " " #item ";"
+ * " offset:%u; size:%u;\n",
+ * offsetof(struct ftrace_raw_##call, item),
+ * sizeof(field.type));
+ *
+ * }
+ */
+
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
+
+#undef __field
+#define __field(type, item) \
+ ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
+ "offset:%u;\tsize:%u;\n", \
+ (unsigned int)offsetof(typeof(field), item), \
+ (unsigned int)sizeof(field.item)); \
+ if (!ret) \
+ return 0;
+
+#undef __array
+#define __array(type, item, len) \
+ ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
+ "offset:%u;\tsize:%u;\n", \
+ (unsigned int)offsetof(typeof(field), item), \
+ (unsigned int)sizeof(field.item)); \
+ if (!ret) \
+ return 0;
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) \
+ ret = trace_seq_printf(s, "\tfield:__data_loc " #item ";\t" \
+ "offset:%u;\tsize:%u;\n", \
+ (unsigned int)offsetof(typeof(field), \
+ __data_loc_##item), \
+ (unsigned int)sizeof(field.__data_loc_##item)); \
+ if (!ret) \
+ return 0;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef __entry
+#define __entry REC
+
+#undef __print_symbolic
+#undef __get_dynamic_array
+#undef __get_str
+
+#undef TP_printk
+#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
+
+#undef TP_fast_assign
+#define TP_fast_assign(args...) args
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
+static int \
+ftrace_format_##call(struct trace_seq *s) \
+{ \
+ struct ftrace_raw_##call field __attribute__((unused)); \
+ int ret = 0; \
+ \
+ tstruct; \
+ \
+ trace_seq_printf(s, "\nprint fmt: " print); \
+ \
+ return ret; \
+}
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Stage 3 of the trace events.
+ *
+ * Override the macros in <trace/trace_events.h> to include the following:
+ *
+ * enum print_line_t
+ * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
+ * {
+ * struct trace_seq *s = &iter->seq;
+ * struct ftrace_raw_<call> *field; <-- defined in stage 1
+ * struct trace_entry *entry;
+ * struct trace_seq *p;
+ * int ret;
+ *
+ * entry = iter->ent;
+ *
+ * if (entry->type != event_<call>.id) {
+ * WARN_ON_ONCE(1);
+ * return TRACE_TYPE_UNHANDLED;
+ * }
+ *
+ * field = (typeof(field))entry;
+ *
+ * p = get_cpu_var(ftrace_event_seq);
+ * trace_seq_init(p);
+ * ret = trace_seq_printf(s, <TP_printk> "\n");
+ * put_cpu();
+ * if (!ret)
+ * return TRACE_TYPE_PARTIAL_LINE;
+ *
+ * return TRACE_TYPE_HANDLED;
+ * }
+ *
+ * This is the method used to print the raw event to the trace
+ * output format. Note, this is not needed if the data is read
+ * in binary.
+ */
+
+#undef __entry
+#define __entry field
+
+#undef TP_printk
+#define TP_printk(fmt, args...) fmt "\n", args
+
+#undef __get_dynamic_array
+#define __get_dynamic_array(field) \
+ ((void *)__entry + __entry->__data_loc_##field)
+
+#undef __get_str
+#define __get_str(field) (char *)__get_dynamic_array(field)
+
+#undef __print_flags
+#define __print_flags(flag, delim, flag_array...) \
+ ({ \
+ static const struct trace_print_flags flags[] = \
+ { flag_array, { -1, NULL }}; \
+ ftrace_print_flags_seq(p, delim, flag, flags); \
+ })
+
+#undef __print_symbolic
+#define __print_symbolic(value, symbol_array...) \
+ ({ \
+ static const struct trace_print_flags symbols[] = \
+ { symbol_array, { -1, NULL }}; \
+ ftrace_print_symbols_seq(p, value, symbols); \
+ })
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
+enum print_line_t \
+ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
+{ \
+ struct trace_seq *s = &iter->seq; \
+ struct ftrace_raw_##call *field; \
+ struct trace_entry *entry; \
+ struct trace_seq *p; \
+ int ret; \
+ \
+ entry = iter->ent; \
+ \
+ if (entry->type != event_##call.id) { \
+ WARN_ON_ONCE(1); \
+ return TRACE_TYPE_UNHANDLED; \
+ } \
+ \
+ field = (typeof(field))entry; \
+ \
+ p = &get_cpu_var(ftrace_event_seq); \
+ trace_seq_init(p); \
+ ret = trace_seq_printf(s, #call ": " print); \
+ put_cpu(); \
+ if (!ret) \
+ return TRACE_TYPE_PARTIAL_LINE; \
+ \
+ return TRACE_TYPE_HANDLED; \
+}
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#undef __field
+#define __field(type, item) \
+ ret = trace_define_field(event_call, #type, #item, \
+ offsetof(typeof(field), item), \
+ sizeof(field.item), is_signed_type(type)); \
+ if (ret) \
+ return ret;
+
+#undef __array
+#define __array(type, item, len) \
+ BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
+ ret = trace_define_field(event_call, #type "[" #len "]", #item, \
+ offsetof(typeof(field), item), \
+ sizeof(field.item), 0); \
+ if (ret) \
+ return ret;
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) \
+ ret = trace_define_field(event_call, "__data_loc" "[" #type "]", #item,\
+ offsetof(typeof(field), __data_loc_##item), \
+ sizeof(field.__data_loc_##item), 0);
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
+int \
+ftrace_define_fields_##call(void) \
+{ \
+ struct ftrace_raw_##call field; \
+ struct ftrace_event_call *event_call = &event_##call; \
+ int ret; \
+ \
+ __common_field(int, type, 1); \
+ __common_field(unsigned char, flags, 0); \
+ __common_field(unsigned char, preempt_count, 0); \
+ __common_field(int, pid, 1); \
+ __common_field(int, tgid, 1); \
+ \
+ tstruct; \
+ \
+ return ret; \
+}
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * remember the offset of each array from the beginning of the event.
+ */
+
+#undef __entry
+#define __entry entry
+
+#undef __field
+#define __field(type, item)
+
+#undef __array
+#define __array(type, item, len)
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) \
+ __data_offsets->item = __data_size + \
+ offsetof(typeof(*entry), __data); \
+ __data_size += (len) * sizeof(type);
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) \
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
+static inline int ftrace_get_offsets_##call( \
+ struct ftrace_data_offsets_##call *__data_offsets, proto) \
+{ \
+ int __data_size = 0; \
+ struct ftrace_raw_##call __maybe_unused *entry; \
+ \
+ tstruct; \
+ \
+ return __data_size; \
+}
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Stage 4 of the trace events.
+ *
+ * Override the macros in <trace/trace_events.h> to include the following:
+ *
+ * static void ftrace_event_<call>(proto)
+ * {
+ * event_trace_printk(_RET_IP_, "<call>: " <fmt>);
+ * }
+ *
+ * static int ftrace_reg_event_<call>(void)
+ * {
+ * int ret;
+ *
+ * ret = register_trace_<call>(ftrace_event_<call>);
+ * if (!ret)
+ * pr_info("event trace: Could not activate trace point "
+ * "probe to <call>");
+ * return ret;
+ * }
+ *
+ * static void ftrace_unreg_event_<call>(void)
+ * {
+ * unregister_trace_<call>(ftrace_event_<call>);
+ * }
+ *
+ *
+ * For those macros defined with TRACE_EVENT:
+ *
+ * static struct ftrace_event_call event_<call>;
+ *
+ * static void ftrace_raw_event_<call>(proto)
+ * {
+ * struct ring_buffer_event *event;
+ * struct ftrace_raw_<call> *entry; <-- defined in stage 1
+ * unsigned long irq_flags;
+ * int pc;
+ *
+ * local_save_flags(irq_flags);
+ * pc = preempt_count();
+ *
+ * event = trace_current_buffer_lock_reserve(event_<call>.id,
+ * sizeof(struct ftrace_raw_<call>),
+ * irq_flags, pc);
+ * if (!event)
+ * return;
+ * entry = ring_buffer_event_data(event);
+ *
+ * <assign>; <-- Here we assign the entries by the __field and
+ * __array macros.
+ *
+ * trace_current_buffer_unlock_commit(event, irq_flags, pc);
+ * }
+ *
+ * static int ftrace_raw_reg_event_<call>(void)
+ * {
+ * int ret;
+ *
+ * ret = register_trace_<call>(ftrace_raw_event_<call>);
+ * if (!ret)
+ * pr_info("event trace: Could not activate trace point "
+ * "probe to <call>");
+ * return ret;
+ * }
+ *
+ * static void ftrace_unreg_event_<call>(void)
+ * {
+ * unregister_trace_<call>(ftrace_raw_event_<call>);
+ * }
+ *
+ * static struct trace_event ftrace_event_type_<call> = {
+ * .trace = ftrace_raw_output_<call>, <-- stage 2
+ * };
+ *
+ * static int ftrace_raw_init_event_<call>(void)
+ * {
+ * int id;
+ *
+ * id = register_ftrace_event(&ftrace_event_type_<call>);
+ * if (!id)
+ * return -ENODEV;
+ * event_<call>.id = id;
+ * return 0;
+ * }
+ *
+ * static struct ftrace_event_call __used
+ * __attribute__((__aligned__(4)))
+ * __attribute__((section("_ftrace_events"))) event_<call> = {
+ * .name = "<call>",
+ * .system = "<system>",
+ * .raw_init = ftrace_raw_init_event_<call>,
+ * .regfunc = ftrace_reg_event_<call>,
+ * .unregfunc = ftrace_unreg_event_<call>,
+ * .show_format = ftrace_format_<call>,
+ * }
+ *
+ */
+
+#undef TP_FMT
+#define TP_FMT(fmt, args...) fmt "\n", ##args
+
+#ifdef CONFIG_EVENT_PROFILE
+#define _TRACE_PROFILE(call, proto, args) \
+static void ftrace_profile_##call(proto) \
+{ \
+ extern void perf_tpcounter_event(int); \
+ perf_tpcounter_event(event_##call.id); \
+} \
+ \
+static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \
+{ \
+ int ret = 0; \
+ \
+ if (!atomic_inc_return(&event_call->profile_count)) \
+ ret = register_trace_##call(ftrace_profile_##call); \
+ \
+ return ret; \
+} \
+ \
+static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
+{ \
+ if (atomic_add_negative(-1, &event_call->profile_count)) \
+ unregister_trace_##call(ftrace_profile_##call); \
+}
+
+#define _TRACE_PROFILE_INIT(call) \
+ .profile_count = ATOMIC_INIT(-1), \
+ .profile_enable = ftrace_profile_enable_##call, \
+ .profile_disable = ftrace_profile_disable_##call,
+
+#else
+#define _TRACE_PROFILE(call, proto, args)
+#define _TRACE_PROFILE_INIT(call)
+#endif
+
+#undef __entry
+#define __entry entry
+
+#undef __field
+#define __field(type, item)
+
+#undef __array
+#define __array(type, item, len)
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) \
+ __entry->__data_loc_##item = __data_offsets.item;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1) \
+
+#undef __assign_str
+#define __assign_str(dst, src) \
+ strcpy(__get_str(dst), src);
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
+_TRACE_PROFILE(call, PARAMS(proto), PARAMS(args)) \
+ \
+static struct ftrace_event_call event_##call; \
+ \
+static void ftrace_raw_event_##call(proto) \
+{ \
+ struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
+ struct ftrace_event_call *event_call = &event_##call; \
+ struct ring_buffer_event *event; \
+ struct ftrace_raw_##call *entry; \
+ unsigned long irq_flags; \
+ int __data_size; \
+ int pc; \
+ \
+ local_save_flags(irq_flags); \
+ pc = preempt_count(); \
+ \
+ __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
+ \
+ event = trace_current_buffer_lock_reserve(event_##call.id, \
+ sizeof(*entry) + __data_size, \
+ irq_flags, pc); \
+ if (!event) \
+ return; \
+ entry = ring_buffer_event_data(event); \
+ \
+ \
+ tstruct \
+ \
+ { assign; } \
+ \
+ if (!filter_current_check_discard(event_call, entry, event)) \
+ trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
+} \
+ \
+static int ftrace_raw_reg_event_##call(void) \
+{ \
+ int ret; \
+ \
+ ret = register_trace_##call(ftrace_raw_event_##call); \
+ if (ret) \
+ pr_info("event trace: Could not activate trace point " \
+ "probe to " #call "\n"); \
+ return ret; \
+} \
+ \
+static void ftrace_raw_unreg_event_##call(void) \
+{ \
+ unregister_trace_##call(ftrace_raw_event_##call); \
+} \
+ \
+static struct trace_event ftrace_event_type_##call = { \
+ .trace = ftrace_raw_output_##call, \
+}; \
+ \
+static int ftrace_raw_init_event_##call(void) \
+{ \
+ int id; \
+ \
+ id = register_ftrace_event(&ftrace_event_type_##call); \
+ if (!id) \
+ return -ENODEV; \
+ event_##call.id = id; \
+ INIT_LIST_HEAD(&event_##call.fields); \
+ init_preds(&event_##call); \
+ return 0; \
+} \
+ \
+static struct ftrace_event_call __used \
+__attribute__((__aligned__(4))) \
+__attribute__((section("_ftrace_events"))) event_##call = { \
+ .name = #call, \
+ .system = __stringify(TRACE_SYSTEM), \
+ .event = &ftrace_event_type_##call, \
+ .raw_init = ftrace_raw_init_event_##call, \
+ .regfunc = ftrace_raw_reg_event_##call, \
+ .unregfunc = ftrace_raw_unreg_event_##call, \
+ .show_format = ftrace_format_##call, \
+ .define_fields = ftrace_define_fields_##call, \
+ _TRACE_PROFILE_INIT(call) \
+}
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#undef _TRACE_PROFILE
+#undef _TRACE_PROFILE_INIT
+
+++ /dev/null
-#ifndef _TRACE_IRQ_H
-#define _TRACE_IRQ_H
-
-#include <linux/interrupt.h>
-#include <linux/tracepoint.h>
-
-#include <trace/irq_event_types.h>
-
-#endif
+++ /dev/null
-
-/* use <trace/irq.h> instead */
-#ifndef TRACE_FORMAT
-# error Do not include this file directly.
-# error Unless you know what you are doing.
-#endif
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM irq
-
-/*
- * Tracepoint for entry of interrupt handler:
- */
-TRACE_FORMAT(irq_handler_entry,
- TP_PROTO(int irq, struct irqaction *action),
- TP_ARGS(irq, action),
- TP_FMT("irq=%d handler=%s", irq, action->name)
- );
-
-/*
- * Tracepoint for return of an interrupt handler:
- */
-TRACE_EVENT(irq_handler_exit,
-
- TP_PROTO(int irq, struct irqaction *action, int ret),
-
- TP_ARGS(irq, action, ret),
-
- TP_STRUCT__entry(
- __field( int, irq )
- __field( int, ret )
- ),
-
- TP_fast_assign(
- __entry->irq = irq;
- __entry->ret = ret;
- ),
-
- TP_printk("irq=%d return=%s",
- __entry->irq, __entry->ret ? "handled" : "unhandled")
-);
-
-TRACE_FORMAT(softirq_entry,
- TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
- TP_ARGS(h, vec),
- TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
- );
-
-TRACE_FORMAT(softirq_exit,
- TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
- TP_ARGS(h, vec),
- TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
- );
-
-#undef TRACE_SYSTEM
+++ /dev/null
-/*
- * Copyright (C) 2008 Eduard - Gabriel Munteanu
- *
- * This file is released under GPL version 2.
- */
-
-#ifndef _LINUX_KMEMTRACE_H
-#define _LINUX_KMEMTRACE_H
-
-#ifdef __KERNEL__
-
-#include <linux/tracepoint.h>
-#include <linux/types.h>
-
-#ifdef CONFIG_KMEMTRACE
-extern void kmemtrace_init(void);
-#else
-static inline void kmemtrace_init(void)
-{
-}
-#endif
-
-DECLARE_TRACE(kmalloc,
- TP_PROTO(unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags),
- TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags));
-DECLARE_TRACE(kmem_cache_alloc,
- TP_PROTO(unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags),
- TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags));
-DECLARE_TRACE(kmalloc_node,
- TP_PROTO(unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node),
- TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node));
-DECLARE_TRACE(kmem_cache_alloc_node,
- TP_PROTO(unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node),
- TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node));
-DECLARE_TRACE(kfree,
- TP_PROTO(unsigned long call_site, const void *ptr),
- TP_ARGS(call_site, ptr));
-DECLARE_TRACE(kmem_cache_free,
- TP_PROTO(unsigned long call_site, const void *ptr),
- TP_ARGS(call_site, ptr));
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_KMEMTRACE_H */
-
+++ /dev/null
-#ifndef _TRACE_LOCKDEP_H
-#define _TRACE_LOCKDEP_H
-
-#include <linux/lockdep.h>
-#include <linux/tracepoint.h>
-
-#include <trace/lockdep_event_types.h>
-
-#endif
+++ /dev/null
-
-#ifndef TRACE_FORMAT
-# error Do not include this file directly.
-# error Unless you know what you are doing.
-#endif
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM lock
-
-#ifdef CONFIG_LOCKDEP
-
-TRACE_FORMAT(lock_acquire,
- TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
- int trylock, int read, int check,
- struct lockdep_map *next_lock, unsigned long ip),
- TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),
- TP_FMT("%s%s%s", trylock ? "try " : "",
- read ? "read " : "", lock->name)
- );
-
-TRACE_FORMAT(lock_release,
- TP_PROTO(struct lockdep_map *lock, int nested, unsigned long ip),
- TP_ARGS(lock, nested, ip),
- TP_FMT("%s", lock->name)
- );
-
-#ifdef CONFIG_LOCK_STAT
-
-TRACE_FORMAT(lock_contended,
- TP_PROTO(struct lockdep_map *lock, unsigned long ip),
- TP_ARGS(lock, ip),
- TP_FMT("%s", lock->name)
- );
-
-TRACE_FORMAT(lock_acquired,
- TP_PROTO(struct lockdep_map *lock, unsigned long ip),
- TP_ARGS(lock, ip),
- TP_FMT("%s", lock->name)
- );
-
-#endif
-#endif
-
-#undef TRACE_SYSTEM
+++ /dev/null
-#ifndef _TRACE_SCHED_H
-#define _TRACE_SCHED_H
-
-#include <linux/sched.h>
-#include <linux/tracepoint.h>
-
-#include <trace/sched_event_types.h>
-
-#endif
+++ /dev/null
-#ifndef _TRACE_SKB_H_
-#define _TRACE_SKB_H_
-
-#include <linux/skbuff.h>
-#include <linux/tracepoint.h>
-
-DECLARE_TRACE(kfree_skb,
- TP_PROTO(struct sk_buff *skb, void *location),
- TP_ARGS(skb, location));
-
-#endif
+++ /dev/null
-/* trace/<type>_event_types.h here */
-
-#include <trace/sched_event_types.h>
-#include <trace/irq_event_types.h>
-#include <trace/lockdep_event_types.h>
+++ /dev/null
-/* trace/<type>.h here */
-
-#include <trace/sched.h>
-#include <trace/irq.h>
-#include <trace/lockdep.h>
+++ /dev/null
-#ifndef __TRACE_WORKQUEUE_H
-#define __TRACE_WORKQUEUE_H
-
-#include <linux/tracepoint.h>
-#include <linux/workqueue.h>
-#include <linux/sched.h>
-
-DECLARE_TRACE(workqueue_insertion,
- TP_PROTO(struct task_struct *wq_thread, struct work_struct *work),
- TP_ARGS(wq_thread, work));
-
-DECLARE_TRACE(workqueue_execution,
- TP_PROTO(struct task_struct *wq_thread, struct work_struct *work),
- TP_ARGS(wq_thread, work));
-
-/* Trace the creation of one workqueue thread on a cpu */
-DECLARE_TRACE(workqueue_creation,
- TP_PROTO(struct task_struct *wq_thread, int cpu),
- TP_ARGS(wq_thread, cpu));
-
-DECLARE_TRACE(workqueue_destruction,
- TP_PROTO(struct task_struct *wq_thread),
- TP_ARGS(wq_thread));
-
-#endif /* __TRACE_WORKQUEUE_H */
--- /dev/null
+header-y += evtchn.h
irq will be disabled so it won't deliver an interrupt. */
void xen_poll_irq(int irq);
+/* Determine the IRQ which is bound to an event channel */
+unsigned irq_from_evtchn(unsigned int evtchn);
+
#endif /* _XEN_EVENTS_H */
--- /dev/null
+/******************************************************************************
+ * evtchn.h
+ *
+ * Interface to /dev/xen/evtchn.
+ *
+ * Copyright (c) 2003-2005, K A Fraser
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef __LINUX_PUBLIC_EVTCHN_H__
+#define __LINUX_PUBLIC_EVTCHN_H__
+
+/*
+ * Bind a fresh port to VIRQ @virq.
+ * Return allocated port.
+ */
+#define IOCTL_EVTCHN_BIND_VIRQ \
+ _IOC(_IOC_NONE, 'E', 0, sizeof(struct ioctl_evtchn_bind_virq))
+struct ioctl_evtchn_bind_virq {
+ unsigned int virq;
+};
+
+/*
+ * Bind a fresh port to remote <@remote_domain, @remote_port>.
+ * Return allocated port.
+ */
+#define IOCTL_EVTCHN_BIND_INTERDOMAIN \
+ _IOC(_IOC_NONE, 'E', 1, sizeof(struct ioctl_evtchn_bind_interdomain))
+struct ioctl_evtchn_bind_interdomain {
+ unsigned int remote_domain, remote_port;
+};
+
+/*
+ * Allocate a fresh port for binding to @remote_domain.
+ * Return allocated port.
+ */
+#define IOCTL_EVTCHN_BIND_UNBOUND_PORT \
+ _IOC(_IOC_NONE, 'E', 2, sizeof(struct ioctl_evtchn_bind_unbound_port))
+struct ioctl_evtchn_bind_unbound_port {
+ unsigned int remote_domain;
+};
+
+/*
+ * Unbind previously allocated @port.
+ */
+#define IOCTL_EVTCHN_UNBIND \
+ _IOC(_IOC_NONE, 'E', 3, sizeof(struct ioctl_evtchn_unbind))
+struct ioctl_evtchn_unbind {
+ unsigned int port;
+};
+
+/*
+ * Unbind previously allocated @port.
+ */
+#define IOCTL_EVTCHN_NOTIFY \
+ _IOC(_IOC_NONE, 'E', 4, sizeof(struct ioctl_evtchn_notify))
+struct ioctl_evtchn_notify {
+ unsigned int port;
+};
+
+/* Clear and reinitialise the event buffer. Clear error condition. */
+#define IOCTL_EVTCHN_RESET \
+ _IOC(_IOC_NONE, 'E', 5, 0)
+
+#endif /* __LINUX_PUBLIC_EVTCHN_H__ */
/* Declares the features reported by XENVER_get_features. */
#include "features.h"
+/* arg == NULL; returns host memory page size. */
+#define XENVER_pagesize 7
+
#endif /* __XEN_PUBLIC_VERSION_H__ */
void (*otherend_changed)(struct xenbus_device *dev,
enum xenbus_state backend_state);
int (*remove)(struct xenbus_device *dev);
- int (*suspend)(struct xenbus_device *dev);
- int (*suspend_cancel)(struct xenbus_device *dev);
+ int (*suspend)(struct xenbus_device *dev, pm_message_t state);
int (*resume)(struct xenbus_device *dev);
int (*uevent)(struct xenbus_device *, char **, int, char *, int);
struct device_driver driver;
choice
prompt "RCU Implementation"
- default CLASSIC_RCU
+ default TREE_RCU
config CLASSIC_RCU
bool "Classic RCU"
by some high performance threaded applications. Disabling
this option saves about 7k.
+config HAVE_PERF_COUNTERS
+ bool
+
+menu "Performance Counters"
+
+config PERF_COUNTERS
+ bool "Kernel Performance Counters"
+ depends on HAVE_PERF_COUNTERS
+ select ANON_INODES
+ help
+ Enable kernel support for performance counter hardware.
+
+ Performance counters are special hardware registers available
+ on most modern CPUs. These registers count the number of certain
+ types of hw events: such as instructions executed, cachemisses
+ suffered, or branches mis-predicted - without slowing down the
+ kernel or applications. These registers can also trigger interrupts
+ when a threshold number of events have passed - and can thus be
+ used to profile the code that runs on that CPU.
+
+ The Linux Performance Counter subsystem provides an abstraction of
+ these hardware capabilities, available via a system call. It
+ provides per task and per CPU counters, and it provides event
+ capabilities on top of those.
+
+ Say Y if unsure.
+
+config EVENT_PROFILE
+ bool "Tracepoint profile sources"
+ depends on PERF_COUNTERS && EVENT_TRACER
+ default y
+
+endmenu
+
config VM_EVENT_COUNTERS
default y
bool "Enable VM event counters for /proc/vmstat" if EMBEDDED
#include <linux/idr.h>
#include <linux/ftrace.h>
#include <linux/async.h>
+#include <linux/kmemtrace.h>
#include <trace/boot.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/sections.h>
#include <asm/cacheflush.h>
-#include <trace/kmemtrace.h>
#ifdef CONFIG_X86_LOCAL_APIC
#include <asm/smp.h>
int i;
rcu_read_lock();
- un = list_entry(rcu_dereference(ulp->list_proc.next),
- struct sem_undo, list_proc);
+ un = list_entry_rcu(ulp->list_proc.next,
+ struct sem_undo, list_proc);
if (&un->list_proc == &ulp->list_proc)
semid = -1;
else
obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
+obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_SLOW_WORK) += slow-work.o
+obj-$(CONFIG_PERF_COUNTERS) += perf_counter.o
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
}
+asmlinkage long
+compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
+ struct compat_siginfo __user *uinfo)
+{
+ siginfo_t info;
+
+ if (copy_siginfo_from_user32(&info, uinfo))
+ return -EFAULT;
+ return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
+}
+
#ifdef __ARCH_WANT_COMPAT_SYS_TIME
/* compat_time_t is a 32 bit "long" and needs to get converted. */
#include <linux/tracehook.h>
#include <linux/fs_struct.h>
#include <linux/init_task.h>
-#include <trace/sched.h>
+#include <linux/perf_counter.h>
+#include <trace/events/sched.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include <asm/mmu_context.h>
#include "cred-internals.h"
-DEFINE_TRACE(sched_process_free);
-DEFINE_TRACE(sched_process_exit);
-DEFINE_TRACE(sched_process_wait);
-
static void exit_mm(struct task_struct * tsk);
static void __unhash_process(struct task_struct *p)
{
struct task_struct *tsk = container_of(rhp, struct task_struct, rcu);
+#ifdef CONFIG_PERF_COUNTERS
+ WARN_ON_ONCE(tsk->perf_counter_ctxp);
+#endif
trace_sched_process_free(tsk);
put_task_struct(tsk);
}
atomic_dec(&__task_cred(p)->user->processes);
proc_flush_task(p);
+
write_lock_irq(&tasklist_lock);
tracehook_finish_release_task(p);
__exit_signal(p);
module_put(tsk->binfmt->module);
proc_exit_connector(tsk);
+
+ /*
+ * Flush inherited counters to the parent - before the parent
+ * gets woken up by child-exit notifications.
+ */
+ perf_counter_exit_task(tsk);
+
exit_notify(tsk, group_dead);
#ifdef CONFIG_NUMA
mpol_put(tsk->mempolicy);
tsk->mempolicy = NULL;
#endif
#ifdef CONFIG_FUTEX
- /*
- * This must happen late, after the PID is not
- * hashed anymore:
- */
if (unlikely(!list_empty(&tsk->pi_state_list)))
exit_pi_state_list(tsk);
if (unlikely(current->pi_state_cache))
#include <linux/proc_fs.h>
#include <linux/blkdev.h>
#include <linux/fs_struct.h>
-#include <trace/sched.h>
#include <linux/magic.h>
+#include <linux/perf_counter.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
+#include <trace/events/sched.h>
+
/*
* Protected counters by write_lock_irq(&tasklist_lock)
*/
__cacheline_aligned DEFINE_RWLOCK(tasklist_lock); /* outer */
-DEFINE_TRACE(sched_process_fork);
-
int nr_processes(void)
{
int cpu;
if (!p)
goto fork_out;
+ ftrace_graph_init_task(p);
+
rt_mutex_init_task(p);
#ifdef CONFIG_PROVE_LOCKING
#ifdef CONFIG_DEBUG_MUTEXES
p->blocked_on = NULL; /* not blocked yet */
#endif
- if (unlikely(current->ptrace))
- ptrace_fork(p, clone_flags);
+
+ p->bts = NULL;
/* Perform scheduler related setup. Assign this task to a CPU. */
sched_fork(p, clone_flags);
+ retval = perf_counter_init_task(p);
+ if (retval)
+ goto bad_fork_cleanup_policy;
+
if ((retval = audit_alloc(p)))
goto bad_fork_cleanup_policy;
/* copy all the process information */
}
}
- ftrace_graph_init_task(p);
-
p->pid = pid_nr(pid);
p->tgid = p->pid;
if (clone_flags & CLONE_THREAD)
if (current->nsproxy != p->nsproxy) {
retval = ns_cgroup_clone(p, pid);
if (retval)
- goto bad_fork_free_graph;
+ goto bad_fork_free_pid;
}
p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr : NULL;
spin_unlock(¤t->sighand->siglock);
write_unlock_irq(&tasklist_lock);
retval = -ERESTARTNOINTR;
- goto bad_fork_free_graph;
+ goto bad_fork_free_pid;
}
if (clone_flags & CLONE_THREAD) {
cgroup_post_fork(p);
return p;
-bad_fork_free_graph:
- ftrace_graph_exit_task(p);
bad_fork_free_pid:
if (pid != &init_struct_pid)
free_pid(pid);
bad_fork_cleanup_audit:
audit_free(p);
bad_fork_cleanup_policy:
+ perf_counter_free_task(p);
#ifdef CONFIG_NUMA
mpol_put(p->mempolicy);
bad_fork_cleanup_cgroup:
if (clone_flags & CLONE_VFORK) {
p->vfork_done = &vfork;
init_completion(&vfork);
+ } else if (!(clone_flags & CLONE_VM)) {
+ /*
+ * vfork will do an exec which will call
+ * set_task_comm()
+ */
+ perf_counter_fork(p);
}
audit_finish_fork(p);
* PRIVATE futexes by Eric Dumazet
* Copyright (C) 2007 Eric Dumazet <dada1@cosmosbay.com>
*
+ * Requeue-PI support by Darren Hart <dvhltc@us.ibm.com>
+ * Copyright (C) IBM Corporation, 2009
+ * Thanks to Thomas Gleixner for conceptual design and careful reviews.
+ *
* Thanks to Ben LaHaise for yelling "hashed waitqueues" loudly
* enough at me, Linus for the original (flawed) idea, Matthew
* Kirkwood for proof-of-concept implementation.
*/
struct futex_q {
struct plist_node list;
- /* There can only be a single waiter */
- wait_queue_head_t waiter;
+ /* Waiter reference */
+ struct task_struct *task;
/* Which hash list lock to use: */
spinlock_t *lock_ptr;
/* Optional priority inheritance state: */
struct futex_pi_state *pi_state;
- struct task_struct *task;
+
+ /* rt_waiter storage for requeue_pi: */
+ struct rt_mutex_waiter *rt_waiter;
/* Bitset for the optional bitmasked wakeup */
u32 bitset;
drop_futex_key_refs(key);
}
+/**
+ * futex_top_waiter() - Return the highest priority waiter on a futex
+ * @hb: the hash bucket the futex_q's reside in
+ * @key: the futex key (to distinguish it from other futex futex_q's)
+ *
+ * Must be called with the hb lock held.
+ */
+static struct futex_q *futex_top_waiter(struct futex_hash_bucket *hb,
+ union futex_key *key)
+{
+ struct futex_q *this;
+
+ plist_for_each_entry(this, &hb->chain, list) {
+ if (match_futex(&this->key, key))
+ return this;
+ }
+ return NULL;
+}
+
static u32 cmpxchg_futex_value_locked(u32 __user *uaddr, u32 uval, u32 newval)
{
u32 curval;
return 0;
}
+/**
+ * futex_lock_pi_atomic() - atomic work required to acquire a pi aware futex
+ * @uaddr: the pi futex user address
+ * @hb: the pi futex hash bucket
+ * @key: the futex key associated with uaddr and hb
+ * @ps: the pi_state pointer where we store the result of the
+ * lookup
+ * @task: the task to perform the atomic lock work for. This will
+ * be "current" except in the case of requeue pi.
+ * @set_waiters: force setting the FUTEX_WAITERS bit (1) or not (0)
+ *
+ * Returns:
+ * 0 - ready to wait
+ * 1 - acquired the lock
+ * <0 - error
+ *
+ * The hb->lock and futex_key refs shall be held by the caller.
+ */
+static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
+ union futex_key *key,
+ struct futex_pi_state **ps,
+ struct task_struct *task, int set_waiters)
+{
+ int lock_taken, ret, ownerdied = 0;
+ u32 uval, newval, curval;
+
+retry:
+ ret = lock_taken = 0;
+
+ /*
+ * To avoid races, we attempt to take the lock here again
+ * (by doing a 0 -> TID atomic cmpxchg), while holding all
+ * the locks. It will most likely not succeed.
+ */
+ newval = task_pid_vnr(task);
+ if (set_waiters)
+ newval |= FUTEX_WAITERS;
+
+ curval = cmpxchg_futex_value_locked(uaddr, 0, newval);
+
+ if (unlikely(curval == -EFAULT))
+ return -EFAULT;
+
+ /*
+ * Detect deadlocks.
+ */
+ if ((unlikely((curval & FUTEX_TID_MASK) == task_pid_vnr(task))))
+ return -EDEADLK;
+
+ /*
+ * Surprise - we got the lock. Just return to userspace:
+ */
+ if (unlikely(!curval))
+ return 1;
+
+ uval = curval;
+
+ /*
+ * Set the FUTEX_WAITERS flag, so the owner will know it has someone
+ * to wake at the next unlock.
+ */
+ newval = curval | FUTEX_WAITERS;
+
+ /*
+ * There are two cases, where a futex might have no owner (the
+ * owner TID is 0): OWNER_DIED. We take over the futex in this
+ * case. We also do an unconditional take over, when the owner
+ * of the futex died.
+ *
+ * This is safe as we are protected by the hash bucket lock !
+ */
+ if (unlikely(ownerdied || !(curval & FUTEX_TID_MASK))) {
+ /* Keep the OWNER_DIED bit */
+ newval = (curval & ~FUTEX_TID_MASK) | task_pid_vnr(task);
+ ownerdied = 0;
+ lock_taken = 1;
+ }
+
+ curval = cmpxchg_futex_value_locked(uaddr, uval, newval);
+
+ if (unlikely(curval == -EFAULT))
+ return -EFAULT;
+ if (unlikely(curval != uval))
+ goto retry;
+
+ /*
+ * We took the lock due to owner died take over.
+ */
+ if (unlikely(lock_taken))
+ return 1;
+
+ /*
+ * We dont have the lock. Look up the PI state (or create it if
+ * we are the first waiter):
+ */
+ ret = lookup_pi_state(uval, hb, key, ps);
+
+ if (unlikely(ret)) {
+ switch (ret) {
+ case -ESRCH:
+ /*
+ * No owner found for this futex. Check if the
+ * OWNER_DIED bit is set to figure out whether
+ * this is a robust futex or not.
+ */
+ if (get_futex_value_locked(&curval, uaddr))
+ return -EFAULT;
+
+ /*
+ * We simply start over in case of a robust
+ * futex. The code above will take the futex
+ * and return happy.
+ */
+ if (curval & FUTEX_OWNER_DIED) {
+ ownerdied = 1;
+ goto retry;
+ }
+ default:
+ break;
+ }
+ }
+
+ return ret;
+}
+
/*
* The hash bucket lock must be held when this is called.
* Afterwards, the futex_q must not be accessed.
*/
static void wake_futex(struct futex_q *q)
{
- plist_del(&q->list, &q->list.plist);
+ struct task_struct *p = q->task;
+
/*
- * The lock in wake_up_all() is a crucial memory barrier after the
- * plist_del() and also before assigning to q->lock_ptr.
+ * We set q->lock_ptr = NULL _before_ we wake up the task. If
+ * a non futex wake up happens on another CPU then the task
+ * might exit and p would dereference a non existing task
+ * struct. Prevent this by holding a reference on p across the
+ * wake up.
*/
- wake_up(&q->waiter);
+ get_task_struct(p);
+
+ plist_del(&q->list, &q->list.plist);
/*
- * The waiting task can free the futex_q as soon as this is written,
- * without taking any locks. This must come last.
- *
- * A memory barrier is required here to prevent the following store to
- * lock_ptr from getting ahead of the wakeup. Clearing the lock at the
- * end of wake_up() does not prevent this store from moving.
+ * The waiting task can free the futex_q as soon as
+ * q->lock_ptr = NULL is written, without taking any locks. A
+ * memory barrier is required here to prevent the following
+ * store to lock_ptr from getting ahead of the plist_del.
*/
smp_wmb();
q->lock_ptr = NULL;
+
+ wake_up_state(p, TASK_NORMAL);
+ put_task_struct(p);
}
static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
plist_for_each_entry_safe(this, next, head, list) {
if (match_futex (&this->key, &key)) {
- if (this->pi_state) {
+ if (this->pi_state || this->rt_waiter) {
ret = -EINVAL;
break;
}
return ret;
}
-/*
- * Requeue all waiters hashed on one physical page to another
- * physical page.
+/**
+ * requeue_futex() - Requeue a futex_q from one hb to another
+ * @q: the futex_q to requeue
+ * @hb1: the source hash_bucket
+ * @hb2: the target hash_bucket
+ * @key2: the new key for the requeued futex_q
+ */
+static inline
+void requeue_futex(struct futex_q *q, struct futex_hash_bucket *hb1,
+ struct futex_hash_bucket *hb2, union futex_key *key2)
+{
+
+ /*
+ * If key1 and key2 hash to the same bucket, no need to
+ * requeue.
+ */
+ if (likely(&hb1->chain != &hb2->chain)) {
+ plist_del(&q->list, &hb1->chain);
+ plist_add(&q->list, &hb2->chain);
+ q->lock_ptr = &hb2->lock;
+#ifdef CONFIG_DEBUG_PI_LIST
+ q->list.plist.lock = &hb2->lock;
+#endif
+ }
+ get_futex_key_refs(key2);
+ q->key = *key2;
+}
+
+/**
+ * requeue_pi_wake_futex() - Wake a task that acquired the lock during requeue
+ * q: the futex_q
+ * key: the key of the requeue target futex
+ *
+ * During futex_requeue, with requeue_pi=1, it is possible to acquire the
+ * target futex if it is uncontended or via a lock steal. Set the futex_q key
+ * to the requeue target futex so the waiter can detect the wakeup on the right
+ * futex, but remove it from the hb and NULL the rt_waiter so it can detect
+ * atomic lock acquisition. Must be called with the q->lock_ptr held.
+ */
+static inline
+void requeue_pi_wake_futex(struct futex_q *q, union futex_key *key)
+{
+ drop_futex_key_refs(&q->key);
+ get_futex_key_refs(key);
+ q->key = *key;
+
+ WARN_ON(plist_node_empty(&q->list));
+ plist_del(&q->list, &q->list.plist);
+
+ WARN_ON(!q->rt_waiter);
+ q->rt_waiter = NULL;
+
+ wake_up_state(q->task, TASK_NORMAL);
+}
+
+/**
+ * futex_proxy_trylock_atomic() - Attempt an atomic lock for the top waiter
+ * @pifutex: the user address of the to futex
+ * @hb1: the from futex hash bucket, must be locked by the caller
+ * @hb2: the to futex hash bucket, must be locked by the caller
+ * @key1: the from futex key
+ * @key2: the to futex key
+ * @ps: address to store the pi_state pointer
+ * @set_waiters: force setting the FUTEX_WAITERS bit (1) or not (0)
+ *
+ * Try and get the lock on behalf of the top waiter if we can do it atomically.
+ * Wake the top waiter if we succeed. If the caller specified set_waiters,
+ * then direct futex_lock_pi_atomic() to force setting the FUTEX_WAITERS bit.
+ * hb1 and hb2 must be held by the caller.
+ *
+ * Returns:
+ * 0 - failed to acquire the lock atomicly
+ * 1 - acquired the lock
+ * <0 - error
+ */
+static int futex_proxy_trylock_atomic(u32 __user *pifutex,
+ struct futex_hash_bucket *hb1,
+ struct futex_hash_bucket *hb2,
+ union futex_key *key1, union futex_key *key2,
+ struct futex_pi_state **ps, int set_waiters)
+{
+ struct futex_q *top_waiter = NULL;
+ u32 curval;
+ int ret;
+
+ if (get_futex_value_locked(&curval, pifutex))
+ return -EFAULT;
+
+ /*
+ * Find the top_waiter and determine if there are additional waiters.
+ * If the caller intends to requeue more than 1 waiter to pifutex,
+ * force futex_lock_pi_atomic() to set the FUTEX_WAITERS bit now,
+ * as we have means to handle the possible fault. If not, don't set
+ * the bit unecessarily as it will force the subsequent unlock to enter
+ * the kernel.
+ */
+ top_waiter = futex_top_waiter(hb1, key1);
+
+ /* There are no waiters, nothing for us to do. */
+ if (!top_waiter)
+ return 0;
+
+ /*
+ * Try to take the lock for top_waiter. Set the FUTEX_WAITERS bit in
+ * the contended case or if set_waiters is 1. The pi_state is returned
+ * in ps in contended cases.
+ */
+ ret = futex_lock_pi_atomic(pifutex, hb2, key2, ps, top_waiter->task,
+ set_waiters);
+ if (ret == 1)
+ requeue_pi_wake_futex(top_waiter, key2);
+
+ return ret;
+}
+
+/**
+ * futex_requeue() - Requeue waiters from uaddr1 to uaddr2
+ * uaddr1: source futex user address
+ * uaddr2: target futex user address
+ * nr_wake: number of waiters to wake (must be 1 for requeue_pi)
+ * nr_requeue: number of waiters to requeue (0-INT_MAX)
+ * requeue_pi: if we are attempting to requeue from a non-pi futex to a
+ * pi futex (pi to pi requeue is not supported)
+ *
+ * Requeue waiters on uaddr1 to uaddr2. In the requeue_pi case, try to acquire
+ * uaddr2 atomically on behalf of the top waiter.
+ *
+ * Returns:
+ * >=0 - on success, the number of tasks requeued or woken
+ * <0 - on error
*/
static int futex_requeue(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
- int nr_wake, int nr_requeue, u32 *cmpval)
+ int nr_wake, int nr_requeue, u32 *cmpval,
+ int requeue_pi)
{
union futex_key key1 = FUTEX_KEY_INIT, key2 = FUTEX_KEY_INIT;
+ int drop_count = 0, task_count = 0, ret;
+ struct futex_pi_state *pi_state = NULL;
struct futex_hash_bucket *hb1, *hb2;
struct plist_head *head1;
struct futex_q *this, *next;
- int ret, drop_count = 0;
+ u32 curval2;
+
+ if (requeue_pi) {
+ /*
+ * requeue_pi requires a pi_state, try to allocate it now
+ * without any locks in case it fails.
+ */
+ if (refill_pi_state_cache())
+ return -ENOMEM;
+ /*
+ * requeue_pi must wake as many tasks as it can, up to nr_wake
+ * + nr_requeue, since it acquires the rt_mutex prior to
+ * returning to userspace, so as to not leave the rt_mutex with
+ * waiters and no owner. However, second and third wake-ups
+ * cannot be predicted as they involve race conditions with the
+ * first wake and a fault while looking up the pi_state. Both
+ * pthread_cond_signal() and pthread_cond_broadcast() should
+ * use nr_wake=1.
+ */
+ if (nr_wake != 1)
+ return -EINVAL;
+ }
retry:
+ if (pi_state != NULL) {
+ /*
+ * We will have to lookup the pi_state again, so free this one
+ * to keep the accounting correct.
+ */
+ free_pi_state(pi_state);
+ pi_state = NULL;
+ }
+
ret = get_futex_key(uaddr1, fshared, &key1, VERIFY_READ);
if (unlikely(ret != 0))
goto out;
- ret = get_futex_key(uaddr2, fshared, &key2, VERIFY_READ);
+ ret = get_futex_key(uaddr2, fshared, &key2,
+ requeue_pi ? VERIFY_WRITE : VERIFY_READ);
if (unlikely(ret != 0))
goto out_put_key1;
}
}
+ if (requeue_pi && (task_count - nr_wake < nr_requeue)) {
+ /*
+ * Attempt to acquire uaddr2 and wake the top waiter. If we
+ * intend to requeue waiters, force setting the FUTEX_WAITERS
+ * bit. We force this here where we are able to easily handle
+ * faults rather in the requeue loop below.
+ */
+ ret = futex_proxy_trylock_atomic(uaddr2, hb1, hb2, &key1,
+ &key2, &pi_state, nr_requeue);
+
+ /*
+ * At this point the top_waiter has either taken uaddr2 or is
+ * waiting on it. If the former, then the pi_state will not
+ * exist yet, look it up one more time to ensure we have a
+ * reference to it.
+ */
+ if (ret == 1) {
+ WARN_ON(pi_state);
+ task_count++;
+ ret = get_futex_value_locked(&curval2, uaddr2);
+ if (!ret)
+ ret = lookup_pi_state(curval2, hb2, &key2,
+ &pi_state);
+ }
+
+ switch (ret) {
+ case 0:
+ break;
+ case -EFAULT:
+ double_unlock_hb(hb1, hb2);
+ put_futex_key(fshared, &key2);
+ put_futex_key(fshared, &key1);
+ ret = get_user(curval2, uaddr2);
+ if (!ret)
+ goto retry;
+ goto out;
+ case -EAGAIN:
+ /* The owner was exiting, try again. */
+ double_unlock_hb(hb1, hb2);
+ put_futex_key(fshared, &key2);
+ put_futex_key(fshared, &key1);
+ cond_resched();
+ goto retry;
+ default:
+ goto out_unlock;
+ }
+ }
+
head1 = &hb1->chain;
plist_for_each_entry_safe(this, next, head1, list) {
- if (!match_futex (&this->key, &key1))
+ if (task_count - nr_wake >= nr_requeue)
+ break;
+
+ if (!match_futex(&this->key, &key1))
continue;
- if (++ret <= nr_wake) {
+
+ WARN_ON(!requeue_pi && this->rt_waiter);
+ WARN_ON(requeue_pi && !this->rt_waiter);
+
+ /*
+ * Wake nr_wake waiters. For requeue_pi, if we acquired the
+ * lock, we already woke the top_waiter. If not, it will be
+ * woken by futex_unlock_pi().
+ */
+ if (++task_count <= nr_wake && !requeue_pi) {
wake_futex(this);
- } else {
- /*
- * If key1 and key2 hash to the same bucket, no need to
- * requeue.
- */
- if (likely(head1 != &hb2->chain)) {
- plist_del(&this->list, &hb1->chain);
- plist_add(&this->list, &hb2->chain);
- this->lock_ptr = &hb2->lock;
-#ifdef CONFIG_DEBUG_PI_LIST
- this->list.plist.lock = &hb2->lock;
-#endif
- }
- this->key = key2;
- get_futex_key_refs(&key2);
- drop_count++;
+ continue;
+ }
- if (ret - nr_wake >= nr_requeue)
- break;
+ /*
+ * Requeue nr_requeue waiters and possibly one more in the case
+ * of requeue_pi if we couldn't acquire the lock atomically.
+ */
+ if (requeue_pi) {
+ /* Prepare the waiter to take the rt_mutex. */
+ atomic_inc(&pi_state->refcount);
+ this->pi_state = pi_state;
+ ret = rt_mutex_start_proxy_lock(&pi_state->pi_mutex,
+ this->rt_waiter,
+ this->task, 1);
+ if (ret == 1) {
+ /* We got the lock. */
+ requeue_pi_wake_futex(this, &key2);
+ continue;
+ } else if (ret) {
+ /* -EDEADLK */
+ this->pi_state = NULL;
+ free_pi_state(pi_state);
+ goto out_unlock;
+ }
}
+ requeue_futex(this, hb1, hb2, &key2);
+ drop_count++;
}
out_unlock:
out_put_key1:
put_futex_key(fshared, &key1);
out:
- return ret;
+ if (pi_state != NULL)
+ free_pi_state(pi_state);
+ return ret ? ret : task_count;
}
/* The key must be already stored in q->key. */
{
struct futex_hash_bucket *hb;
- init_waitqueue_head(&q->waiter);
-
get_futex_key_refs(&q->key);
hb = hash_futex(&q->key);
q->lock_ptr = &hb->lock;
*/
#define FLAGS_SHARED 0x01
#define FLAGS_CLOCKRT 0x02
+#define FLAGS_HAS_TIMEOUT 0x04
static long futex_wait_restart(struct restart_block *restart);
-static int futex_wait(u32 __user *uaddr, int fshared,
- u32 val, ktime_t *abs_time, u32 bitset, int clockrt)
+/**
+ * fixup_owner() - Post lock pi_state and corner case management
+ * @uaddr: user address of the futex
+ * @fshared: whether the futex is shared (1) or not (0)
+ * @q: futex_q (contains pi_state and access to the rt_mutex)
+ * @locked: if the attempt to take the rt_mutex succeeded (1) or not (0)
+ *
+ * After attempting to lock an rt_mutex, this function is called to cleanup
+ * the pi_state owner as well as handle race conditions that may allow us to
+ * acquire the lock. Must be called with the hb lock held.
+ *
+ * Returns:
+ * 1 - success, lock taken
+ * 0 - success, lock not taken
+ * <0 - on error (-EFAULT)
+ */
+static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q,
+ int locked)
{
- struct task_struct *curr = current;
- struct restart_block *restart;
- DECLARE_WAITQUEUE(wait, curr);
- struct futex_hash_bucket *hb;
- struct futex_q q;
- u32 uval;
- int ret;
- struct hrtimer_sleeper t;
- int rem = 0;
-
- if (!bitset)
- return -EINVAL;
+ struct task_struct *owner;
+ int ret = 0;
- q.pi_state = NULL;
- q.bitset = bitset;
-retry:
- q.key = FUTEX_KEY_INIT;
- ret = get_futex_key(uaddr, fshared, &q.key, VERIFY_READ);
- if (unlikely(ret != 0))
+ if (locked) {
+ /*
+ * Got the lock. We might not be the anticipated owner if we
+ * did a lock-steal - fix up the PI-state in that case:
+ */
+ if (q->pi_state->owner != current)
+ ret = fixup_pi_state_owner(uaddr, q, current, fshared);
goto out;
+ }
-retry_private:
- hb = queue_lock(&q);
+ /*
+ * Catch the rare case, where the lock was released when we were on the
+ * way back before we locked the hash bucket.
+ */
+ if (q->pi_state->owner == current) {
+ /*
+ * Try to get the rt_mutex now. This might fail as some other
+ * task acquired the rt_mutex after we removed ourself from the
+ * rt_mutex waiters list.
+ */
+ if (rt_mutex_trylock(&q->pi_state->pi_mutex)) {
+ locked = 1;
+ goto out;
+ }
+
+ /*
+ * pi_state is incorrect, some other task did a lock steal and
+ * we returned due to timeout or signal without taking the
+ * rt_mutex. Too late. We can access the rt_mutex_owner without
+ * locking, as the other task is now blocked on the hash bucket
+ * lock. Fix the state up.
+ */
+ owner = rt_mutex_owner(&q->pi_state->pi_mutex);
+ ret = fixup_pi_state_owner(uaddr, q, owner, fshared);
+ goto out;
+ }
/*
- * Access the page AFTER the hash-bucket is locked.
- * Order is important:
+ * Paranoia check. If we did not take the lock, then we should not be
+ * the owner, nor the pending owner, of the rt_mutex.
+ */
+ if (rt_mutex_owner(&q->pi_state->pi_mutex) == current)
+ printk(KERN_ERR "fixup_owner: ret = %d pi-mutex: %p "
+ "pi-state %p\n", ret,
+ q->pi_state->pi_mutex.owner,
+ q->pi_state->owner);
+
+out:
+ return ret ? ret : locked;
+}
+
+/**
+ * futex_wait_queue_me() - queue_me() and wait for wakeup, timeout, or signal
+ * @hb: the futex hash bucket, must be locked by the caller
+ * @q: the futex_q to queue up on
+ * @timeout: the prepared hrtimer_sleeper, or null for no timeout
+ */
+static void futex_wait_queue_me(struct futex_hash_bucket *hb, struct futex_q *q,
+ struct hrtimer_sleeper *timeout)
+{
+ queue_me(q, hb);
+
+ /*
+ * There might have been scheduling since the queue_me(), as we
+ * cannot hold a spinlock across the get_user() in case it
+ * faults, and we cannot just set TASK_INTERRUPTIBLE state when
+ * queueing ourselves into the futex hash. This code thus has to
+ * rely on the futex_wake() code removing us from hash when it
+ * wakes us up.
+ */
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ /* Arm the timer */
+ if (timeout) {
+ hrtimer_start_expires(&timeout->timer, HRTIMER_MODE_ABS);
+ if (!hrtimer_active(&timeout->timer))
+ timeout->task = NULL;
+ }
+
+ /*
+ * !plist_node_empty() is safe here without any lock.
+ * q.lock_ptr != 0 is not safe, because of ordering against wakeup.
+ */
+ if (likely(!plist_node_empty(&q->list))) {
+ /*
+ * If the timer has already expired, current will already be
+ * flagged for rescheduling. Only call schedule if there
+ * is no timeout, or if it has yet to expire.
+ */
+ if (!timeout || timeout->task)
+ schedule();
+ }
+ __set_current_state(TASK_RUNNING);
+}
+
+/**
+ * futex_wait_setup() - Prepare to wait on a futex
+ * @uaddr: the futex userspace address
+ * @val: the expected value
+ * @fshared: whether the futex is shared (1) or not (0)
+ * @q: the associated futex_q
+ * @hb: storage for hash_bucket pointer to be returned to caller
+ *
+ * Setup the futex_q and locate the hash_bucket. Get the futex value and
+ * compare it with the expected value. Handle atomic faults internally.
+ * Return with the hb lock held and a q.key reference on success, and unlocked
+ * with no q.key reference on failure.
+ *
+ * Returns:
+ * 0 - uaddr contains val and hb has been locked
+ * <1 - -EFAULT or -EWOULDBLOCK (uaddr does not contain val) and hb is unlcoked
+ */
+static int futex_wait_setup(u32 __user *uaddr, u32 val, int fshared,
+ struct futex_q *q, struct futex_hash_bucket **hb)
+{
+ u32 uval;
+ int ret;
+
+ /*
+ * Access the page AFTER the hash-bucket is locked.
+ * Order is important:
*
* Userspace waiter: val = var; if (cond(val)) futex_wait(&var, val);
* Userspace waker: if (cond(var)) { var = new; futex_wake(&var); }
* A consequence is that futex_wait() can return zero and absorb
* a wakeup when *uaddr != val on entry to the syscall. This is
* rare, but normal.
- *
- * For shared futexes, we hold the mmap semaphore, so the mapping
- * cannot have changed since we looked it up in get_futex_key.
*/
+retry:
+ q->key = FUTEX_KEY_INIT;
+ ret = get_futex_key(uaddr, fshared, &q->key, VERIFY_READ);
+ if (unlikely(ret != 0))
+ return ret;
+
+retry_private:
+ *hb = queue_lock(q);
+
ret = get_futex_value_locked(&uval, uaddr);
- if (unlikely(ret)) {
- queue_unlock(&q, hb);
+ if (ret) {
+ queue_unlock(q, *hb);
ret = get_user(uval, uaddr);
if (ret)
- goto out_put_key;
+ goto out;
if (!fshared)
goto retry_private;
- put_futex_key(fshared, &q.key);
+ put_futex_key(fshared, &q->key);
goto retry;
}
- ret = -EWOULDBLOCK;
- if (unlikely(uval != val)) {
- queue_unlock(&q, hb);
- goto out_put_key;
- }
- /* Only actually queue if *uaddr contained val. */
- queue_me(&q, hb);
+ if (uval != val) {
+ queue_unlock(q, *hb);
+ ret = -EWOULDBLOCK;
+ }
- /*
- * There might have been scheduling since the queue_me(), as we
- * cannot hold a spinlock across the get_user() in case it
- * faults, and we cannot just set TASK_INTERRUPTIBLE state when
- * queueing ourselves into the futex hash. This code thus has to
- * rely on the futex_wake() code removing us from hash when it
- * wakes us up.
- */
+out:
+ if (ret)
+ put_futex_key(fshared, &q->key);
+ return ret;
+}
- /* add_wait_queue is the barrier after __set_current_state. */
- __set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&q.waiter, &wait);
- /*
- * !plist_node_empty() is safe here without any lock.
- * q.lock_ptr != 0 is not safe, because of ordering against wakeup.
- */
- if (likely(!plist_node_empty(&q.list))) {
- if (!abs_time)
- schedule();
- else {
- hrtimer_init_on_stack(&t.timer,
- clockrt ? CLOCK_REALTIME :
- CLOCK_MONOTONIC,
- HRTIMER_MODE_ABS);
- hrtimer_init_sleeper(&t, current);
- hrtimer_set_expires_range_ns(&t.timer, *abs_time,
- current->timer_slack_ns);
-
- hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
- if (!hrtimer_active(&t.timer))
- t.task = NULL;
+static int futex_wait(u32 __user *uaddr, int fshared,
+ u32 val, ktime_t *abs_time, u32 bitset, int clockrt)
+{
+ struct hrtimer_sleeper timeout, *to = NULL;
+ struct restart_block *restart;
+ struct futex_hash_bucket *hb;
+ struct futex_q q;
+ int ret;
- /*
- * the timer could have already expired, in which
- * case current would be flagged for rescheduling.
- * Don't bother calling schedule.
- */
- if (likely(t.task))
- schedule();
+ if (!bitset)
+ return -EINVAL;
- hrtimer_cancel(&t.timer);
+ q.pi_state = NULL;
+ q.bitset = bitset;
+ q.rt_waiter = NULL;
- /* Flag if a timeout occured */
- rem = (t.task == NULL);
+ if (abs_time) {
+ to = &timeout;
- destroy_hrtimer_on_stack(&t.timer);
- }
+ hrtimer_init_on_stack(&to->timer, clockrt ? CLOCK_REALTIME :
+ CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ hrtimer_init_sleeper(to, current);
+ hrtimer_set_expires_range_ns(&to->timer, *abs_time,
+ current->timer_slack_ns);
}
- __set_current_state(TASK_RUNNING);
- /*
- * NOTE: we don't remove ourselves from the waitqueue because
- * we are the only user of it.
- */
+ /* Prepare to wait on uaddr. */
+ ret = futex_wait_setup(uaddr, val, fshared, &q, &hb);
+ if (ret)
+ goto out;
+
+ /* queue_me and wait for wakeup, timeout, or a signal. */
+ futex_wait_queue_me(hb, &q, to);
/* If we were woken (and unqueued), we succeeded, whatever. */
ret = 0;
if (!unqueue_me(&q))
goto out_put_key;
ret = -ETIMEDOUT;
- if (rem)
+ if (to && !to->task)
goto out_put_key;
/*
restart->futex.val = val;
restart->futex.time = abs_time->tv64;
restart->futex.bitset = bitset;
- restart->futex.flags = 0;
+ restart->futex.flags = FLAGS_HAS_TIMEOUT;
if (fshared)
restart->futex.flags |= FLAGS_SHARED;
out_put_key:
put_futex_key(fshared, &q.key);
out:
+ if (to) {
+ hrtimer_cancel(&to->timer);
+ destroy_hrtimer_on_stack(&to->timer);
+ }
return ret;
}
{
u32 __user *uaddr = (u32 __user *)restart->futex.uaddr;
int fshared = 0;
- ktime_t t;
+ ktime_t t, *tp = NULL;
- t.tv64 = restart->futex.time;
+ if (restart->futex.flags & FLAGS_HAS_TIMEOUT) {
+ t.tv64 = restart->futex.time;
+ tp = &t;
+ }
restart->fn = do_no_restart_syscall;
if (restart->futex.flags & FLAGS_SHARED)
fshared = 1;
- return (long)futex_wait(uaddr, fshared, restart->futex.val, &t,
+ return (long)futex_wait(uaddr, fshared, restart->futex.val, tp,
restart->futex.bitset,
restart->futex.flags & FLAGS_CLOCKRT);
}
int detect, ktime_t *time, int trylock)
{
struct hrtimer_sleeper timeout, *to = NULL;
- struct task_struct *curr = current;
struct futex_hash_bucket *hb;
- u32 uval, newval, curval;
+ u32 uval;
struct futex_q q;
- int ret, lock_taken, ownerdied = 0;
+ int res, ret;
if (refill_pi_state_cache())
return -ENOMEM;
}
q.pi_state = NULL;
+ q.rt_waiter = NULL;
retry:
q.key = FUTEX_KEY_INIT;
ret = get_futex_key(uaddr, fshared, &q.key, VERIFY_WRITE);
retry_private:
hb = queue_lock(&q);
-retry_locked:
- ret = lock_taken = 0;
-
- /*
- * To avoid races, we attempt to take the lock here again
- * (by doing a 0 -> TID atomic cmpxchg), while holding all
- * the locks. It will most likely not succeed.
- */
- newval = task_pid_vnr(current);
-
- curval = cmpxchg_futex_value_locked(uaddr, 0, newval);
-
- if (unlikely(curval == -EFAULT))
- goto uaddr_faulted;
-
- /*
- * Detect deadlocks. In case of REQUEUE_PI this is a valid
- * situation and we return success to user space.
- */
- if (unlikely((curval & FUTEX_TID_MASK) == task_pid_vnr(current))) {
- ret = -EDEADLK;
- goto out_unlock_put_key;
- }
-
- /*
- * Surprise - we got the lock. Just return to userspace:
- */
- if (unlikely(!curval))
- goto out_unlock_put_key;
-
- uval = curval;
-
- /*
- * Set the WAITERS flag, so the owner will know it has someone
- * to wake at next unlock
- */
- newval = curval | FUTEX_WAITERS;
-
- /*
- * There are two cases, where a futex might have no owner (the
- * owner TID is 0): OWNER_DIED. We take over the futex in this
- * case. We also do an unconditional take over, when the owner
- * of the futex died.
- *
- * This is safe as we are protected by the hash bucket lock !
- */
- if (unlikely(ownerdied || !(curval & FUTEX_TID_MASK))) {
- /* Keep the OWNER_DIED bit */
- newval = (curval & ~FUTEX_TID_MASK) | task_pid_vnr(current);
- ownerdied = 0;
- lock_taken = 1;
- }
-
- curval = cmpxchg_futex_value_locked(uaddr, uval, newval);
-
- if (unlikely(curval == -EFAULT))
- goto uaddr_faulted;
- if (unlikely(curval != uval))
- goto retry_locked;
-
- /*
- * We took the lock due to owner died take over.
- */
- if (unlikely(lock_taken))
- goto out_unlock_put_key;
-
- /*
- * We dont have the lock. Look up the PI state (or create it if
- * we are the first waiter):
- */
- ret = lookup_pi_state(uval, hb, &q.key, &q.pi_state);
-
+ ret = futex_lock_pi_atomic(uaddr, hb, &q.key, &q.pi_state, current, 0);
if (unlikely(ret)) {
switch (ret) {
-
+ case 1:
+ /* We got the lock. */
+ ret = 0;
+ goto out_unlock_put_key;
+ case -EFAULT:
+ goto uaddr_faulted;
case -EAGAIN:
/*
* Task is exiting and we just wait for the
put_futex_key(fshared, &q.key);
cond_resched();
goto retry;
-
- case -ESRCH:
- /*
- * No owner found for this futex. Check if the
- * OWNER_DIED bit is set to figure out whether
- * this is a robust futex or not.
- */
- if (get_futex_value_locked(&curval, uaddr))
- goto uaddr_faulted;
-
- /*
- * We simply start over in case of a robust
- * futex. The code above will take the futex
- * and return happy.
- */
- if (curval & FUTEX_OWNER_DIED) {
- ownerdied = 1;
- goto retry_locked;
- }
default:
goto out_unlock_put_key;
}
}
spin_lock(q.lock_ptr);
-
- if (!ret) {
- /*
- * Got the lock. We might not be the anticipated owner
- * if we did a lock-steal - fix up the PI-state in
- * that case:
- */
- if (q.pi_state->owner != curr)
- ret = fixup_pi_state_owner(uaddr, &q, curr, fshared);
- } else {
- /*
- * Catch the rare case, where the lock was released
- * when we were on the way back before we locked the
- * hash bucket.
- */
- if (q.pi_state->owner == curr) {
- /*
- * Try to get the rt_mutex now. This might
- * fail as some other task acquired the
- * rt_mutex after we removed ourself from the
- * rt_mutex waiters list.
- */
- if (rt_mutex_trylock(&q.pi_state->pi_mutex))
- ret = 0;
- else {
- /*
- * pi_state is incorrect, some other
- * task did a lock steal and we
- * returned due to timeout or signal
- * without taking the rt_mutex. Too
- * late. We can access the
- * rt_mutex_owner without locking, as
- * the other task is now blocked on
- * the hash bucket lock. Fix the state
- * up.
- */
- struct task_struct *owner;
- int res;
-
- owner = rt_mutex_owner(&q.pi_state->pi_mutex);
- res = fixup_pi_state_owner(uaddr, &q, owner,
- fshared);
-
- /* propagate -EFAULT, if the fixup failed */
- if (res)
- ret = res;
- }
- } else {
- /*
- * Paranoia check. If we did not take the lock
- * in the trylock above, then we should not be
- * the owner of the rtmutex, neither the real
- * nor the pending one:
- */
- if (rt_mutex_owner(&q.pi_state->pi_mutex) == curr)
- printk(KERN_ERR "futex_lock_pi: ret = %d "
- "pi-mutex: %p pi-state %p\n", ret,
- q.pi_state->pi_mutex.owner,
- q.pi_state->owner);
- }
- }
+ /*
+ * Fixup the pi_state owner and possibly acquire the lock if we
+ * haven't already.
+ */
+ res = fixup_owner(uaddr, fshared, &q, !ret);
+ /*
+ * If fixup_owner() returned an error, proprogate that. If it acquired
+ * the lock, clear our -ETIMEDOUT or -EINTR.
+ */
+ if (res)
+ ret = (res < 0) ? res : 0;
/*
- * If fixup_pi_state_owner() faulted and was unable to handle the
- * fault, unlock it and return the fault to userspace.
+ * If fixup_owner() faulted and was unable to handle the fault, unlock
+ * it and return the fault to userspace.
*/
if (ret && (rt_mutex_owner(&q.pi_state->pi_mutex) == current))
rt_mutex_unlock(&q.pi_state->pi_mutex);
/* Unqueue and drop the lock */
unqueue_me_pi(&q);
- if (to)
- destroy_hrtimer_on_stack(&to->timer);
- return ret != -EINTR ? ret : -ERESTARTNOINTR;
+ goto out;
out_unlock_put_key:
queue_unlock(&q, hb);
out:
if (to)
destroy_hrtimer_on_stack(&to->timer);
- return ret;
+ return ret != -EINTR ? ret : -ERESTARTNOINTR;
uaddr_faulted:
/*
goto retry;
}
-
/*
* Userspace attempted a TID -> 0 atomic transition, and failed.
* This is the in-kernel slowpath: we look up the PI state (if any),
return ret;
}
+/**
+ * handle_early_requeue_pi_wakeup() - Detect early wakeup on the initial futex
+ * @hb: the hash_bucket futex_q was original enqueued on
+ * @q: the futex_q woken while waiting to be requeued
+ * @key2: the futex_key of the requeue target futex
+ * @timeout: the timeout associated with the wait (NULL if none)
+ *
+ * Detect if the task was woken on the initial futex as opposed to the requeue
+ * target futex. If so, determine if it was a timeout or a signal that caused
+ * the wakeup and return the appropriate error code to the caller. Must be
+ * called with the hb lock held.
+ *
+ * Returns
+ * 0 - no early wakeup detected
+ * <0 - -ETIMEDOUT or -ERESTARTNOINTR
+ */
+static inline
+int handle_early_requeue_pi_wakeup(struct futex_hash_bucket *hb,
+ struct futex_q *q, union futex_key *key2,
+ struct hrtimer_sleeper *timeout)
+{
+ int ret = 0;
+
+ /*
+ * With the hb lock held, we avoid races while we process the wakeup.
+ * We only need to hold hb (and not hb2) to ensure atomicity as the
+ * wakeup code can't change q.key from uaddr to uaddr2 if we hold hb.
+ * It can't be requeued from uaddr2 to something else since we don't
+ * support a PI aware source futex for requeue.
+ */
+ if (!match_futex(&q->key, key2)) {
+ WARN_ON(q->lock_ptr && (&hb->lock != q->lock_ptr));
+ /*
+ * We were woken prior to requeue by a timeout or a signal.
+ * Unqueue the futex_q and determine which it was.
+ */
+ plist_del(&q->list, &q->list.plist);
+ drop_futex_key_refs(&q->key);
+
+ if (timeout && !timeout->task)
+ ret = -ETIMEDOUT;
+ else
+ ret = -ERESTARTNOINTR;
+ }
+ return ret;
+}
+
+/**
+ * futex_wait_requeue_pi() - Wait on uaddr and take uaddr2
+ * @uaddr: the futex we initialyl wait on (non-pi)
+ * @fshared: whether the futexes are shared (1) or not (0). They must be
+ * the same type, no requeueing from private to shared, etc.
+ * @val: the expected value of uaddr
+ * @abs_time: absolute timeout
+ * @bitset: 32 bit wakeup bitset set by userspace, defaults to all.
+ * @clockrt: whether to use CLOCK_REALTIME (1) or CLOCK_MONOTONIC (0)
+ * @uaddr2: the pi futex we will take prior to returning to user-space
+ *
+ * The caller will wait on uaddr and will be requeued by futex_requeue() to
+ * uaddr2 which must be PI aware. Normal wakeup will wake on uaddr2 and
+ * complete the acquisition of the rt_mutex prior to returning to userspace.
+ * This ensures the rt_mutex maintains an owner when it has waiters; without
+ * one, the pi logic wouldn't know which task to boost/deboost, if there was a
+ * need to.
+ *
+ * We call schedule in futex_wait_queue_me() when we enqueue and return there
+ * via the following:
+ * 1) wakeup on uaddr2 after an atomic lock acquisition by futex_requeue()
+ * 2) wakeup on uaddr2 after a requeue and subsequent unlock
+ * 3) signal (before or after requeue)
+ * 4) timeout (before or after requeue)
+ *
+ * If 3, we setup a restart_block with futex_wait_requeue_pi() as the function.
+ *
+ * If 2, we may then block on trying to take the rt_mutex and return via:
+ * 5) successful lock
+ * 6) signal
+ * 7) timeout
+ * 8) other lock acquisition failure
+ *
+ * If 6, we setup a restart_block with futex_lock_pi() as the function.
+ *
+ * If 4 or 7, we cleanup and return with -ETIMEDOUT.
+ *
+ * Returns:
+ * 0 - On success
+ * <0 - On error
+ */
+static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared,
+ u32 val, ktime_t *abs_time, u32 bitset,
+ int clockrt, u32 __user *uaddr2)
+{
+ struct hrtimer_sleeper timeout, *to = NULL;
+ struct rt_mutex_waiter rt_waiter;
+ struct rt_mutex *pi_mutex = NULL;
+ struct futex_hash_bucket *hb;
+ union futex_key key2;
+ struct futex_q q;
+ int res, ret;
+
+ if (!bitset)
+ return -EINVAL;
+
+ if (abs_time) {
+ to = &timeout;
+ hrtimer_init_on_stack(&to->timer, clockrt ? CLOCK_REALTIME :
+ CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ hrtimer_init_sleeper(to, current);
+ hrtimer_set_expires_range_ns(&to->timer, *abs_time,
+ current->timer_slack_ns);
+ }
+
+ /*
+ * The waiter is allocated on our stack, manipulated by the requeue
+ * code while we sleep on uaddr.
+ */
+ debug_rt_mutex_init_waiter(&rt_waiter);
+ rt_waiter.task = NULL;
+
+ q.pi_state = NULL;
+ q.bitset = bitset;
+ q.rt_waiter = &rt_waiter;
+
+ key2 = FUTEX_KEY_INIT;
+ ret = get_futex_key(uaddr2, fshared, &key2, VERIFY_WRITE);
+ if (unlikely(ret != 0))
+ goto out;
+
+ /* Prepare to wait on uaddr. */
+ ret = futex_wait_setup(uaddr, val, fshared, &q, &hb);
+ if (ret)
+ goto out_key2;
+
+ /* Queue the futex_q, drop the hb lock, wait for wakeup. */
+ futex_wait_queue_me(hb, &q, to);
+
+ spin_lock(&hb->lock);
+ ret = handle_early_requeue_pi_wakeup(hb, &q, &key2, to);
+ spin_unlock(&hb->lock);
+ if (ret)
+ goto out_put_keys;
+
+ /*
+ * In order for us to be here, we know our q.key == key2, and since
+ * we took the hb->lock above, we also know that futex_requeue() has
+ * completed and we no longer have to concern ourselves with a wakeup
+ * race with the atomic proxy lock acquition by the requeue code.
+ */
+
+ /* Check if the requeue code acquired the second futex for us. */
+ if (!q.rt_waiter) {
+ /*
+ * Got the lock. We might not be the anticipated owner if we
+ * did a lock-steal - fix up the PI-state in that case.
+ */
+ if (q.pi_state && (q.pi_state->owner != current)) {
+ spin_lock(q.lock_ptr);
+ ret = fixup_pi_state_owner(uaddr2, &q, current,
+ fshared);
+ spin_unlock(q.lock_ptr);
+ }
+ } else {
+ /*
+ * We have been woken up by futex_unlock_pi(), a timeout, or a
+ * signal. futex_unlock_pi() will not destroy the lock_ptr nor
+ * the pi_state.
+ */
+ WARN_ON(!&q.pi_state);
+ pi_mutex = &q.pi_state->pi_mutex;
+ ret = rt_mutex_finish_proxy_lock(pi_mutex, to, &rt_waiter, 1);
+ debug_rt_mutex_free_waiter(&rt_waiter);
+
+ spin_lock(q.lock_ptr);
+ /*
+ * Fixup the pi_state owner and possibly acquire the lock if we
+ * haven't already.
+ */
+ res = fixup_owner(uaddr2, fshared, &q, !ret);
+ /*
+ * If fixup_owner() returned an error, proprogate that. If it
+ * acquired the lock, clear our -ETIMEDOUT or -EINTR.
+ */
+ if (res)
+ ret = (res < 0) ? res : 0;
+
+ /* Unqueue and drop the lock. */
+ unqueue_me_pi(&q);
+ }
+
+ /*
+ * If fixup_pi_state_owner() faulted and was unable to handle the
+ * fault, unlock the rt_mutex and return the fault to userspace.
+ */
+ if (ret == -EFAULT) {
+ if (rt_mutex_owner(pi_mutex) == current)
+ rt_mutex_unlock(pi_mutex);
+ } else if (ret == -EINTR) {
+ /*
+ * We've already been requeued, but we have no way to
+ * restart by calling futex_lock_pi() directly. We
+ * could restart the syscall, but that will look at
+ * the user space value and return right away. So we
+ * drop back with EWOULDBLOCK to tell user space that
+ * "val" has been changed. That's the same what the
+ * restart of the syscall would do in
+ * futex_wait_setup().
+ */
+ ret = -EWOULDBLOCK;
+ }
+
+out_put_keys:
+ put_futex_key(fshared, &q.key);
+out_key2:
+ put_futex_key(fshared, &key2);
+
+out:
+ if (to) {
+ hrtimer_cancel(&to->timer);
+ destroy_hrtimer_on_stack(&to->timer);
+ }
+ return ret;
+}
+
/*
* Support for robust futexes: the kernel cleans up held futexes at
* thread exit time.
fshared = 1;
clockrt = op & FUTEX_CLOCK_REALTIME;
- if (clockrt && cmd != FUTEX_WAIT_BITSET)
+ if (clockrt && cmd != FUTEX_WAIT_BITSET && cmd != FUTEX_WAIT_REQUEUE_PI)
return -ENOSYS;
switch (cmd) {
ret = futex_wake(uaddr, fshared, val, val3);
break;
case FUTEX_REQUEUE:
- ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, NULL);
+ ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, NULL, 0);
break;
case FUTEX_CMP_REQUEUE:
- ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, &val3);
+ ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, &val3,
+ 0);
break;
case FUTEX_WAKE_OP:
ret = futex_wake_op(uaddr, fshared, uaddr2, val, val2, val3);
if (futex_cmpxchg_enabled)
ret = futex_lock_pi(uaddr, fshared, 0, timeout, 1);
break;
+ case FUTEX_WAIT_REQUEUE_PI:
+ val3 = FUTEX_BITSET_MATCH_ANY;
+ ret = futex_wait_requeue_pi(uaddr, fshared, val, timeout, val3,
+ clockrt, uaddr2);
+ break;
+ case FUTEX_CMP_REQUEUE_PI:
+ ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, &val3,
+ 1);
+ break;
default:
ret = -ENOSYS;
}
int cmd = op & FUTEX_CMD_MASK;
if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI ||
- cmd == FUTEX_WAIT_BITSET)) {
+ cmd == FUTEX_WAIT_BITSET ||
+ cmd == FUTEX_WAIT_REQUEUE_PI)) {
if (copy_from_user(&ts, utime, sizeof(ts)) != 0)
return -EFAULT;
if (!timespec_valid(&ts))
tp = &t;
}
/*
- * requeue parameter in 'utime' if cmd == FUTEX_REQUEUE.
+ * requeue parameter in 'utime' if cmd == FUTEX_*_REQUEUE_*.
* number of waiters to wake in 'utime' if cmd == FUTEX_WAKE_OP.
*/
if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE ||
- cmd == FUTEX_WAKE_OP)
+ cmd == FUTEX_CMP_REQUEUE_PI || cmd == FUTEX_WAKE_OP)
val2 = (u32) (unsigned long) utime;
return do_futex(uaddr, op, val, tp, uaddr2, val2, val3);
obj-$(CONFIG_GENERIC_IRQ_PROBE) += autoprobe.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_GENERIC_PENDING_IRQ) += migration.o
-obj-$(CONFIG_NUMA_MIGRATE_IRQ_DESC) += numa_migrate.o
+obj-$(CONFIG_NUMA_IRQ_DESC) += numa_migrate.o
obj-$(CONFIG_PM_SLEEP) += pm.o
spin_lock(&desc->lock);
mask_ack_irq(desc, irq);
- desc = irq_remap_to_desc(irq, desc);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
desc->status &= ~IRQ_INPROGRESS;
out:
desc->chip->eoi(irq);
- desc = irq_remap_to_desc(irq, desc);
spin_unlock(&desc->lock);
}
!desc->action)) {
desc->status |= (IRQ_PENDING | IRQ_MASKED);
mask_ack_irq(desc, irq);
- desc = irq_remap_to_desc(irq, desc);
goto out_unlock;
}
kstat_incr_irqs_this_cpu(irq, desc);
/* Start handling the irq */
if (desc->chip->ack)
desc->chip->ack(irq);
- desc = irq_remap_to_desc(irq, desc);
/* Mark the IRQ currently in progress.*/
desc->status |= IRQ_INPROGRESS;
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- if (desc->chip->eoi) {
+ if (desc->chip->eoi)
desc->chip->eoi(irq);
- desc = irq_remap_to_desc(irq, desc);
- }
}
void
/* Uninstall? */
if (handle == handle_bad_irq) {
- if (desc->chip != &no_irq_chip) {
+ if (desc->chip != &no_irq_chip)
mask_ack_irq(desc, irq);
- desc = irq_remap_to_desc(irq, desc);
- }
desc->status |= IRQ_DISABLED;
desc->depth = 1;
}
*/
#include <linux/irq.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/rculist.h>
#include <linux/hash.h>
-#include <trace/irq.h>
#include <linux/bootmem.h>
+#include <trace/events/irq.h>
#include "internals.h"
.lock = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
};
-void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)
+void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
{
- int node;
void *ptr;
- node = cpu_to_node(cpu);
- ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs), GFP_ATOMIC, node);
+ if (slab_is_available())
+ ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs),
+ GFP_ATOMIC, node);
+ else
+ ptr = alloc_bootmem_node(NODE_DATA(node),
+ nr * sizeof(*desc->kstat_irqs));
/*
* don't overwite if can not get new one
* init_copy_kstat_irqs() could still use old one
*/
if (ptr) {
- printk(KERN_DEBUG " alloc kstat_irqs on cpu %d node %d\n",
- cpu, node);
+ printk(KERN_DEBUG " alloc kstat_irqs on node %d\n", node);
desc->kstat_irqs = ptr;
}
}
-static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
+static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
{
memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
spin_lock_init(&desc->lock);
desc->irq = irq;
#ifdef CONFIG_SMP
- desc->cpu = cpu;
+ desc->node = node;
#endif
lockdep_set_class(&desc->lock, &irq_desc_lock_class);
- init_kstat_irqs(desc, cpu, nr_cpu_ids);
+ init_kstat_irqs(desc, node, nr_cpu_ids);
if (!desc->kstat_irqs) {
printk(KERN_ERR "can not alloc kstat_irqs\n");
BUG_ON(1);
}
- if (!init_alloc_desc_masks(desc, cpu, false)) {
+ if (!alloc_desc_masks(desc, node, false)) {
printk(KERN_ERR "can not alloc irq_desc cpumasks\n");
BUG_ON(1);
}
- arch_init_chip_data(desc, cpu);
+ init_desc_masks(desc);
+ arch_init_chip_data(desc, node);
}
/*
desc[i].irq = i;
desc[i].kstat_irqs = kstat_irqs_legacy + i * nr_cpu_ids;
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
- init_alloc_desc_masks(&desc[i], 0, true);
+ alloc_desc_masks(&desc[i], 0, true);
+ init_desc_masks(&desc[i]);
irq_desc_ptrs[i] = desc + i;
}
return NULL;
}
-struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
+struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
{
struct irq_desc *desc;
unsigned long flags;
- int node;
if (irq >= nr_irqs) {
WARN(1, "irq (%d) >= nr_irqs (%d) in irq_to_desc_alloc\n",
if (desc)
goto out_unlock;
- node = cpu_to_node(cpu);
- desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
- printk(KERN_DEBUG " alloc irq_desc for %d on cpu %d node %d\n",
- irq, cpu, node);
+ if (slab_is_available())
+ desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
+ else
+ desc = alloc_bootmem_node(NODE_DATA(node), sizeof(*desc));
+
+ printk(KERN_DEBUG " alloc irq_desc for %d on node %d\n", irq, node);
if (!desc) {
printk(KERN_ERR "can not alloc irq_desc\n");
BUG_ON(1);
}
- init_one_irq_desc(irq, desc, cpu);
+ init_one_irq_desc(irq, desc, node);
irq_desc_ptrs[irq] = desc;
for (i = 0; i < count; i++) {
desc[i].irq = i;
- init_alloc_desc_masks(&desc[i], 0, true);
+ alloc_desc_masks(&desc[i], 0, true);
+ init_desc_masks(&desc[i]);
desc[i].kstat_irqs = kstat_irqs_all[i];
}
return arch_early_irq_init();
return (irq < NR_IRQS) ? irq_desc + irq : NULL;
}
-struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
+struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node)
{
return irq_to_desc(irq);
}
"but no thread function available.", irq, action->name);
}
-DEFINE_TRACE(irq_handler_entry);
-DEFINE_TRACE(irq_handler_exit);
-
/**
* handle_IRQ_event - irq action chain handler
* @irq: the interrupt number
/*
* No locking required for CPU-local interrupts:
*/
- if (desc->chip->ack) {
+ if (desc->chip->ack)
desc->chip->ack(irq);
- /* get new one */
- desc = irq_remap_to_desc(irq, desc);
- }
if (likely(!(desc->status & IRQ_DISABLED))) {
action_ret = handle_IRQ_event(irq, desc->action);
if (!noirqdebug)
}
spin_lock(&desc->lock);
- if (desc->chip->ack) {
+ if (desc->chip->ack)
desc->chip->ack(irq);
- desc = irq_remap_to_desc(irq, desc);
- }
/*
* REPLAY is when Linux resends an IRQ that was dropped earlier
* WAITING is used by probe to mark irqs that are being tested
extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
extern struct lock_class_key irq_desc_lock_class;
-extern void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr);
+extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
extern void clear_kstat_irqs(struct irq_desc *desc);
extern spinlock_t sparse_irq_lock;
extern int irq_select_affinity_usr(unsigned int irq);
+extern void
+irq_set_thread_affinity(struct irq_desc *desc, const struct cpumask *cpumask);
+
/*
* Debugging printout:
*/
return 1;
}
-static void
+void
irq_set_thread_affinity(struct irq_desc *desc, const struct cpumask *cpumask)
{
struct irqaction *action = desc->action;
spin_lock_irqsave(&desc->lock, flags);
#ifdef CONFIG_GENERIC_PENDING_IRQ
- if (desc->status & IRQ_MOVE_PCNTXT)
- desc->chip->set_affinity(irq, cpumask);
+ if (desc->status & IRQ_MOVE_PCNTXT) {
+ if (!desc->chip->set_affinity(irq, cpumask)) {
+ cpumask_copy(desc->affinity, cpumask);
+ irq_set_thread_affinity(desc, cpumask);
+ }
+ }
else {
desc->status |= IRQ_MOVE_PENDING;
cpumask_copy(desc->pending_mask, cpumask);
}
#else
- cpumask_copy(desc->affinity, cpumask);
- desc->chip->set_affinity(irq, cpumask);
+ if (!desc->chip->set_affinity(irq, cpumask)) {
+ cpumask_copy(desc->affinity, cpumask);
+ irq_set_thread_affinity(desc, cpumask);
+ }
#endif
- irq_set_thread_affinity(desc, cpumask);
desc->status |= IRQ_AFFINITY_SET;
spin_unlock_irqrestore(&desc->lock, flags);
return 0;
#include <linux/irq.h>
+#include <linux/interrupt.h>
+
+#include "internals.h"
void move_masked_irq(int irq)
{
* masking the irqs.
*/
if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask)
- < nr_cpu_ids)) {
- cpumask_and(desc->affinity,
- desc->pending_mask, cpu_online_mask);
- desc->chip->set_affinity(irq, desc->affinity);
- }
+ < nr_cpu_ids))
+ if (!desc->chip->set_affinity(irq, desc->pending_mask)) {
+ cpumask_copy(desc->affinity, desc->pending_mask);
+ irq_set_thread_affinity(desc, desc->pending_mask);
+ }
+
cpumask_clear(desc->pending_mask);
}
static void init_copy_kstat_irqs(struct irq_desc *old_desc,
struct irq_desc *desc,
- int cpu, int nr)
+ int node, int nr)
{
- init_kstat_irqs(desc, cpu, nr);
+ init_kstat_irqs(desc, node, nr);
if (desc->kstat_irqs != old_desc->kstat_irqs)
memcpy(desc->kstat_irqs, old_desc->kstat_irqs,
}
static bool init_copy_one_irq_desc(int irq, struct irq_desc *old_desc,
- struct irq_desc *desc, int cpu)
+ struct irq_desc *desc, int node)
{
memcpy(desc, old_desc, sizeof(struct irq_desc));
- if (!init_alloc_desc_masks(desc, cpu, false)) {
+ if (!alloc_desc_masks(desc, node, false)) {
printk(KERN_ERR "irq %d: can not get new irq_desc cpumask "
"for migration.\n", irq);
return false;
}
spin_lock_init(&desc->lock);
- desc->cpu = cpu;
+ desc->node = node;
lockdep_set_class(&desc->lock, &irq_desc_lock_class);
- init_copy_kstat_irqs(old_desc, desc, cpu, nr_cpu_ids);
+ init_copy_kstat_irqs(old_desc, desc, node, nr_cpu_ids);
init_copy_desc_masks(old_desc, desc);
- arch_init_copy_chip_data(old_desc, desc, cpu);
+ arch_init_copy_chip_data(old_desc, desc, node);
return true;
}
}
static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
- int cpu)
+ int node)
{
struct irq_desc *desc;
unsigned int irq;
unsigned long flags;
- int node;
irq = old_desc->irq;
if (desc && old_desc != desc)
goto out_unlock;
- node = cpu_to_node(cpu);
desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
if (!desc) {
printk(KERN_ERR "irq %d: can not get new irq_desc "
desc = old_desc;
goto out_unlock;
}
- if (!init_copy_one_irq_desc(irq, old_desc, desc, cpu)) {
+ if (!init_copy_one_irq_desc(irq, old_desc, desc, node)) {
/* still use old one */
kfree(desc);
desc = old_desc;
/* free the old one */
free_one_irq_desc(old_desc, desc);
- spin_unlock(&old_desc->lock);
kfree(old_desc);
- spin_lock(&desc->lock);
return desc;
return desc;
}
-struct irq_desc *move_irq_desc(struct irq_desc *desc, int cpu)
+struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
{
- int old_cpu;
- int node, old_node;
-
/* those all static, do move them */
if (desc->irq < NR_IRQS_LEGACY)
return desc;
- old_cpu = desc->cpu;
- if (old_cpu != cpu) {
- node = cpu_to_node(cpu);
- old_node = cpu_to_node(old_cpu);
- if (old_node != node)
- desc = __real_move_irq_desc(desc, cpu);
- else
- desc->cpu = cpu;
- }
+ if (desc->node != node)
+ desc = __real_move_irq_desc(desc, node);
return desc;
}
#include <linux/file.h>
#include <linux/module.h>
#include <linux/mutex.h>
-#include <trace/sched.h>
+#include <trace/events/sched.h>
#define KTHREAD_NICE_LEVEL (-5)
static LIST_HEAD(kthread_create_list);
struct task_struct *kthreadd_task;
-DEFINE_TRACE(sched_kthread_stop);
-DEFINE_TRACE(sched_kthread_stop_ret);
-
struct kthread_create_info
{
/* Information passed to kthread() from kthreadd. */
#include <linux/hash.h>
#include <linux/ftrace.h>
#include <linux/stringify.h>
-#include <trace/lockdep.h>
#include <asm/sections.h>
#include "lockdep_internals.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/lockdep.h>
+
#ifdef CONFIG_PROVE_LOCKING
int prove_locking = 1;
module_param(prove_locking, int, 0644);
}
EXPORT_SYMBOL_GPL(lock_set_class);
-DEFINE_TRACE(lock_acquire);
-
/*
* We are not always called with irqs disabled - do that here,
* and also avoid lockdep recursion:
}
EXPORT_SYMBOL_GPL(lock_acquire);
-DEFINE_TRACE(lock_release);
-
void lock_release(struct lockdep_map *lock, int nested,
unsigned long ip)
{
hlock->holdtime_stamp = now;
}
+ trace_lock_acquired(lock, ip, waittime);
+
stats = get_lock_stats(hlock_class(hlock));
if (waittime) {
if (hlock->read)
lock->ip = ip;
}
-DEFINE_TRACE(lock_contended);
-
void lock_contended(struct lockdep_map *lock, unsigned long ip)
{
unsigned long flags;
}
EXPORT_SYMBOL_GPL(lock_contended);
-DEFINE_TRACE(lock_acquired);
-
void lock_acquired(struct lockdep_map *lock, unsigned long ip)
{
unsigned long flags;
- trace_lock_acquired(lock, ip);
-
if (unlikely(!lock_stat))
return;
*/
#include <linux/module.h>
#include <linux/moduleloader.h>
+#include <linux/ftrace_event.h>
#include <linux/init.h>
#include <linux/kallsyms.h>
#include <linux/fs.h>
/* Free any allocated parameters. */
destroy_params(mod->kp, mod->num_kp);
- /* release any pointers to mcount in this module */
- ftrace_release(mod->module_core, mod->core_size);
-
/* This may be NULL, but that's OK */
module_free(mod, mod->module_init);
kfree(mod->args);
unsigned int symindex = 0;
unsigned int strindex = 0;
unsigned int modindex, versindex, infoindex, pcpuindex;
- unsigned int num_mcount;
struct module *mod;
long err = 0;
void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
- unsigned long *mseg;
mm_segment_t old_fs;
DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
sizeof(*mod->tracepoints),
&mod->num_tracepoints);
#endif
-
+#ifdef CONFIG_EVENT_TRACING
+ mod->trace_events = section_objs(hdr, sechdrs, secstrings,
+ "_ftrace_events",
+ sizeof(*mod->trace_events),
+ &mod->num_trace_events);
+#endif
+#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+ /* sechdrs[0].sh_size is always zero */
+ mod->ftrace_callsites = section_objs(hdr, sechdrs, secstrings,
+ "__mcount_loc",
+ sizeof(*mod->ftrace_callsites),
+ &mod->num_ftrace_callsites);
+#endif
#ifdef CONFIG_MODVERSIONS
if ((mod->num_syms && !mod->crcs)
|| (mod->num_gpl_syms && !mod->gpl_crcs)
dynamic_debug_setup(debug, num_debug);
}
- /* sechdrs[0].sh_size is always zero */
- mseg = section_objs(hdr, sechdrs, secstrings, "__mcount_loc",
- sizeof(*mseg), &num_mcount);
- ftrace_init_module(mod, mseg, mseg + num_mcount);
-
err = module_finalize(hdr, sechdrs, mod);
if (err < 0)
goto cleanup;
cleanup:
kobject_del(&mod->mkobj.kobj);
kobject_put(&mod->mkobj.kobj);
- ftrace_release(mod->module_core, mod->core_size);
free_unload:
module_unload_free(mod);
#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
*
* This function is similar to (but not equivalent to) down().
*/
-void inline __sched mutex_lock(struct mutex *lock)
+void __sched mutex_lock(struct mutex *lock)
{
might_sleep();
/*
/* didnt get the lock, go to sleep: */
spin_unlock_mutex(&lock->wait_lock, flags);
- __schedule();
+ preempt_enable_no_resched();
+ schedule();
+ preempt_disable();
spin_lock_mutex(&lock->wait_lock, flags);
}
return ret;
}
-
EXPORT_SYMBOL(mutex_trylock);
+
+/**
+ * atomic_dec_and_mutex_lock - return holding mutex if we dec to 0
+ * @cnt: the atomic which we are to dec
+ * @lock: the mutex to return holding if we dec to 0
+ *
+ * return true and hold lock if we dec to 0, return false otherwise
+ */
+int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock)
+{
+ /* dec if we can't possibly hit 0 */
+ if (atomic_add_unless(cnt, -1, 1))
+ return 0;
+ /* we might hit 0, so take the lock */
+ mutex_lock(lock);
+ if (!atomic_dec_and_test(cnt)) {
+ /* when we actually did the dec, we didn't hit 0 */
+ mutex_unlock(lock);
+ return 0;
+ }
+ /* we hit 0, and we hold the lock */
+ return 1;
+}
+EXPORT_SYMBOL(atomic_dec_and_mutex_lock);
--- /dev/null
+/*
+ * Performance counter core code
+ *
+ * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de>
+ * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar
+ * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
+ * Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
+ *
+ * For licensing details see kernel-base/COPYING
+ */
+
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#include <linux/file.h>
+#include <linux/poll.h>
+#include <linux/sysfs.h>
+#include <linux/dcache.h>
+#include <linux/percpu.h>
+#include <linux/ptrace.h>
+#include <linux/vmstat.h>
+#include <linux/hardirq.h>
+#include <linux/rculist.h>
+#include <linux/uaccess.h>
+#include <linux/syscalls.h>
+#include <linux/anon_inodes.h>
+#include <linux/kernel_stat.h>
+#include <linux/perf_counter.h>
+
+#include <asm/irq_regs.h>
+
+/*
+ * Each CPU has a list of per CPU counters:
+ */
+DEFINE_PER_CPU(struct perf_cpu_context, perf_cpu_context);
+
+int perf_max_counters __read_mostly = 1;
+static int perf_reserved_percpu __read_mostly;
+static int perf_overcommit __read_mostly = 1;
+
+static atomic_t nr_counters __read_mostly;
+static atomic_t nr_mmap_counters __read_mostly;
+static atomic_t nr_comm_counters __read_mostly;
+
+/*
+ * perf counter paranoia level:
+ * 0 - not paranoid
+ * 1 - disallow cpu counters to unpriv
+ * 2 - disallow kernel profiling to unpriv
+ */
+int sysctl_perf_counter_paranoid __read_mostly;
+
+static inline bool perf_paranoid_cpu(void)
+{
+ return sysctl_perf_counter_paranoid > 0;
+}
+
+static inline bool perf_paranoid_kernel(void)
+{
+ return sysctl_perf_counter_paranoid > 1;
+}
+
+int sysctl_perf_counter_mlock __read_mostly = 512; /* 'free' kb per user */
+
+/*
+ * max perf counter sample rate
+ */
+int sysctl_perf_counter_sample_rate __read_mostly = 100000;
+
+static atomic64_t perf_counter_id;
+
+/*
+ * Lock for (sysadmin-configurable) counter reservations:
+ */
+static DEFINE_SPINLOCK(perf_resource_lock);
+
+/*
+ * Architecture provided APIs - weak aliases:
+ */
+extern __weak const struct pmu *hw_perf_counter_init(struct perf_counter *counter)
+{
+ return NULL;
+}
+
+void __weak hw_perf_disable(void) { barrier(); }
+void __weak hw_perf_enable(void) { barrier(); }
+
+void __weak hw_perf_counter_setup(int cpu) { barrier(); }
+
+int __weak
+hw_perf_group_sched_in(struct perf_counter *group_leader,
+ struct perf_cpu_context *cpuctx,
+ struct perf_counter_context *ctx, int cpu)
+{
+ return 0;
+}
+
+void __weak perf_counter_print_debug(void) { }
+
+static DEFINE_PER_CPU(int, disable_count);
+
+void __perf_disable(void)
+{
+ __get_cpu_var(disable_count)++;
+}
+
+bool __perf_enable(void)
+{
+ return !--__get_cpu_var(disable_count);
+}
+
+void perf_disable(void)
+{
+ __perf_disable();
+ hw_perf_disable();
+}
+
+void perf_enable(void)
+{
+ if (__perf_enable())
+ hw_perf_enable();
+}
+
+static void get_ctx(struct perf_counter_context *ctx)
+{
+ atomic_inc(&ctx->refcount);
+}
+
+static void free_ctx(struct rcu_head *head)
+{
+ struct perf_counter_context *ctx;
+
+ ctx = container_of(head, struct perf_counter_context, rcu_head);
+ kfree(ctx);
+}
+
+static void put_ctx(struct perf_counter_context *ctx)
+{
+ if (atomic_dec_and_test(&ctx->refcount)) {
+ if (ctx->parent_ctx)
+ put_ctx(ctx->parent_ctx);
+ if (ctx->task)
+ put_task_struct(ctx->task);
+ call_rcu(&ctx->rcu_head, free_ctx);
+ }
+}
+
+/*
+ * Get the perf_counter_context for a task and lock it.
+ * This has to cope with with the fact that until it is locked,
+ * the context could get moved to another task.
+ */
+static struct perf_counter_context *
+perf_lock_task_context(struct task_struct *task, unsigned long *flags)
+{
+ struct perf_counter_context *ctx;
+
+ rcu_read_lock();
+ retry:
+ ctx = rcu_dereference(task->perf_counter_ctxp);
+ if (ctx) {
+ /*
+ * If this context is a clone of another, it might
+ * get swapped for another underneath us by
+ * perf_counter_task_sched_out, though the
+ * rcu_read_lock() protects us from any context
+ * getting freed. Lock the context and check if it
+ * got swapped before we could get the lock, and retry
+ * if so. If we locked the right context, then it
+ * can't get swapped on us any more.
+ */
+ spin_lock_irqsave(&ctx->lock, *flags);
+ if (ctx != rcu_dereference(task->perf_counter_ctxp)) {
+ spin_unlock_irqrestore(&ctx->lock, *flags);
+ goto retry;
+ }
+ }
+ rcu_read_unlock();
+ return ctx;
+}
+
+/*
+ * Get the context for a task and increment its pin_count so it
+ * can't get swapped to another task. This also increments its
+ * reference count so that the context can't get freed.
+ */
+static struct perf_counter_context *perf_pin_task_context(struct task_struct *task)
+{
+ struct perf_counter_context *ctx;
+ unsigned long flags;
+
+ ctx = perf_lock_task_context(task, &flags);
+ if (ctx) {
+ ++ctx->pin_count;
+ get_ctx(ctx);
+ spin_unlock_irqrestore(&ctx->lock, flags);
+ }
+ return ctx;
+}
+
+static void perf_unpin_context(struct perf_counter_context *ctx)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctx->lock, flags);
+ --ctx->pin_count;
+ spin_unlock_irqrestore(&ctx->lock, flags);
+ put_ctx(ctx);
+}
+
+/*
+ * Add a counter from the lists for its context.
+ * Must be called with ctx->mutex and ctx->lock held.
+ */
+static void
+list_add_counter(struct perf_counter *counter, struct perf_counter_context *ctx)
+{
+ struct perf_counter *group_leader = counter->group_leader;
+
+ /*
+ * Depending on whether it is a standalone or sibling counter,
+ * add it straight to the context's counter list, or to the group
+ * leader's sibling list:
+ */
+ if (group_leader == counter)
+ list_add_tail(&counter->list_entry, &ctx->counter_list);
+ else {
+ list_add_tail(&counter->list_entry, &group_leader->sibling_list);
+ group_leader->nr_siblings++;
+ }
+
+ list_add_rcu(&counter->event_entry, &ctx->event_list);
+ ctx->nr_counters++;
+}
+
+/*
+ * Remove a counter from the lists for its context.
+ * Must be called with ctx->mutex and ctx->lock held.
+ */
+static void
+list_del_counter(struct perf_counter *counter, struct perf_counter_context *ctx)
+{
+ struct perf_counter *sibling, *tmp;
+
+ if (list_empty(&counter->list_entry))
+ return;
+ ctx->nr_counters--;
+
+ list_del_init(&counter->list_entry);
+ list_del_rcu(&counter->event_entry);
+
+ if (counter->group_leader != counter)
+ counter->group_leader->nr_siblings--;
+
+ /*
+ * If this was a group counter with sibling counters then
+ * upgrade the siblings to singleton counters by adding them
+ * to the context list directly:
+ */
+ list_for_each_entry_safe(sibling, tmp,
+ &counter->sibling_list, list_entry) {
+
+ list_move_tail(&sibling->list_entry, &ctx->counter_list);
+ sibling->group_leader = sibling;
+ }
+}
+
+static void
+counter_sched_out(struct perf_counter *counter,
+ struct perf_cpu_context *cpuctx,
+ struct perf_counter_context *ctx)
+{
+ if (counter->state != PERF_COUNTER_STATE_ACTIVE)
+ return;
+
+ counter->state = PERF_COUNTER_STATE_INACTIVE;
+ counter->tstamp_stopped = ctx->time;
+ counter->pmu->disable(counter);
+ counter->oncpu = -1;
+
+ if (!is_software_counter(counter))
+ cpuctx->active_oncpu--;
+ ctx->nr_active--;
+ if (counter->attr.exclusive || !cpuctx->active_oncpu)
+ cpuctx->exclusive = 0;
+}
+
+static void
+group_sched_out(struct perf_counter *group_counter,
+ struct perf_cpu_context *cpuctx,
+ struct perf_counter_context *ctx)
+{
+ struct perf_counter *counter;
+
+ if (group_counter->state != PERF_COUNTER_STATE_ACTIVE)
+ return;
+
+ counter_sched_out(group_counter, cpuctx, ctx);
+
+ /*
+ * Schedule out siblings (if any):
+ */
+ list_for_each_entry(counter, &group_counter->sibling_list, list_entry)
+ counter_sched_out(counter, cpuctx, ctx);
+
+ if (group_counter->attr.exclusive)
+ cpuctx->exclusive = 0;
+}
+
+/*
+ * Cross CPU call to remove a performance counter
+ *
+ * We disable the counter on the hardware level first. After that we
+ * remove it from the context list.
+ */
+static void __perf_counter_remove_from_context(void *info)
+{
+ struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
+ struct perf_counter *counter = info;
+ struct perf_counter_context *ctx = counter->ctx;
+
+ /*
+ * If this is a task context, we need to check whether it is
+ * the current task context of this cpu. If not it has been
+ * scheduled out before the smp call arrived.
+ */
+ if (ctx->task && cpuctx->task_ctx != ctx)
+ return;
+
+ spin_lock(&ctx->lock);
+ /*
+ * Protect the list operation against NMI by disabling the
+ * counters on a global level.
+ */
+ perf_disable();
+
+ counter_sched_out(counter, cpuctx, ctx);
+
+ list_del_counter(counter, ctx);
+
+ if (!ctx->task) {
+ /*
+ * Allow more per task counters with respect to the
+ * reservation:
+ */
+ cpuctx->max_pertask =
+ min(perf_max_counters - ctx->nr_counters,
+ perf_max_counters - perf_reserved_percpu);
+ }
+
+ perf_enable();
+ spin_unlock(&ctx->lock);
+}
+
+
+/*
+ * Remove the counter from a task's (or a CPU's) list of counters.
+ *
+ * Must be called with ctx->mutex held.
+ *
+ * CPU counters are removed with a smp call. For task counters we only
+ * call when the task is on a CPU.
+ *
+ * If counter->ctx is a cloned context, callers must make sure that
+ * every task struct that counter->ctx->task could possibly point to
+ * remains valid. This is OK when called from perf_release since
+ * that only calls us on the top-level context, which can't be a clone.
+ * When called from perf_counter_exit_task, it's OK because the
+ * context has been detached from its task.
+ */
+static void perf_counter_remove_from_context(struct perf_counter *counter)
+{
+ struct perf_counter_context *ctx = counter->ctx;
+ struct task_struct *task = ctx->task;
+
+ if (!task) {
+ /*
+ * Per cpu counters are removed via an smp call and
+ * the removal is always sucessful.
+ */
+ smp_call_function_single(counter->cpu,
+ __perf_counter_remove_from_context,
+ counter, 1);
+ return;
+ }
+
+retry:
+ task_oncpu_function_call(task, __perf_counter_remove_from_context,
+ counter);
+
+ spin_lock_irq(&ctx->lock);
+ /*
+ * If the context is active we need to retry the smp call.
+ */
+ if (ctx->nr_active && !list_empty(&counter->list_entry)) {
+ spin_unlock_irq(&ctx->lock);
+ goto retry;
+ }
+
+ /*
+ * The lock prevents that this context is scheduled in so we
+ * can remove the counter safely, if the call above did not
+ * succeed.
+ */
+ if (!list_empty(&counter->list_entry)) {
+ list_del_counter(counter, ctx);
+ }
+ spin_unlock_irq(&ctx->lock);
+}
+
+static inline u64 perf_clock(void)
+{
+ return cpu_clock(smp_processor_id());
+}
+
+/*
+ * Update the record of the current time in a context.
+ */
+static void update_context_time(struct perf_counter_context *ctx)
+{
+ u64 now = perf_clock();
+
+ ctx->time += now - ctx->timestamp;
+ ctx->timestamp = now;
+}
+
+/*
+ * Update the total_time_enabled and total_time_running fields for a counter.
+ */
+static void update_counter_times(struct perf_counter *counter)
+{
+ struct perf_counter_context *ctx = counter->ctx;
+ u64 run_end;
+
+ if (counter->state < PERF_COUNTER_STATE_INACTIVE)
+ return;
+
+ counter->total_time_enabled = ctx->time - counter->tstamp_enabled;
+
+ if (counter->state == PERF_COUNTER_STATE_INACTIVE)
+ run_end = counter->tstamp_stopped;
+ else
+ run_end = ctx->time;
+
+ counter->total_time_running = run_end - counter->tstamp_running;
+}
+
+/*
+ * Update total_time_enabled and total_time_running for all counters in a group.
+ */
+static void update_group_times(struct perf_counter *leader)
+{
+ struct perf_counter *counter;
+
+ update_counter_times(leader);
+ list_for_each_entry(counter, &leader->sibling_list, list_entry)
+ update_counter_times(counter);
+}
+
+/*
+ * Cross CPU call to disable a performance counter
+ */
+static void __perf_counter_disable(void *info)
+{
+ struct perf_counter *counter = info;
+ struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
+ struct perf_counter_context *ctx = counter->ctx;
+
+ /*
+ * If this is a per-task counter, need to check whether this
+ * counter's task is the current task on this cpu.
+ */
+ if (ctx->task && cpuctx->task_ctx != ctx)
+ return;
+
+ spin_lock(&ctx->lock);
+
+ /*
+ * If the counter is on, turn it off.
+ * If it is in error state, leave it in error state.
+ */
+ if (counter->state >= PERF_COUNTER_STATE_INACTIVE) {
+ update_context_time(ctx);
+ update_counter_times(counter);
+ if (counter == counter->group_leader)
+ group_sched_out(counter, cpuctx, ctx);
+ else
+ counter_sched_out(counter, cpuctx, ctx);
+ counter->state = PERF_COUNTER_STATE_OFF;
+ }
+
+ spin_unlock(&ctx->lock);
+}
+
+/*
+ * Disable a counter.
+ *
+ * If counter->ctx is a cloned context, callers must make sure that
+ * every task struct that counter->ctx->task could possibly point to
+ * remains valid. This condition is satisifed when called through
+ * perf_counter_for_each_child or perf_counter_for_each because they
+ * hold the top-level counter's child_mutex, so any descendant that
+ * goes to exit will block in sync_child_counter.
+ * When called from perf_pending_counter it's OK because counter->ctx
+ * is the current context on this CPU and preemption is disabled,
+ * hence we can't get into perf_counter_task_sched_out for this context.
+ */
+static void perf_counter_disable(struct perf_counter *counter)
+{
+ struct perf_counter_context *ctx = counter->ctx;
+ struct task_struct *task = ctx->task;
+
+ if (!task) {
+ /*
+ * Disable the counter on the cpu that it's on
+ */
+ smp_call_function_single(counter->cpu, __perf_counter_disable,
+ counter, 1);
+ return;
+ }
+
+ retry:
+ task_oncpu_function_call(task, __perf_counter_disable, counter);
+
+ spin_lock_irq(&ctx->lock);
+ /*
+ * If the counter is still active, we need to retry the cross-call.
+ */
+ if (counter->state == PERF_COUNTER_STATE_ACTIVE) {
+ spin_unlock_irq(&ctx->lock);
+ goto retry;
+ }
+
+ /*
+ * Since we have the lock this context can't be scheduled
+ * in, so we can change the state safely.
+ */
+ if (counter->state == PERF_COUNTER_STATE_INACTIVE) {
+ update_counter_times(counter);
+ counter->state = PERF_COUNTER_STATE_OFF;
+ }
+
+ spin_unlock_irq(&ctx->lock);
+}
+
+static int
+counter_sched_in(struct perf_counter *counter,
+ struct perf_cpu_context *cpuctx,
+ struct perf_counter_context *ctx,
+ int cpu)
+{
+ if (counter->state <= PERF_COUNTER_STATE_OFF)
+ return 0;
+
+ counter->state = PERF_COUNTER_STATE_ACTIVE;
+ counter->oncpu = cpu; /* TODO: put 'cpu' into cpuctx->cpu */
+ /*
+ * The new state must be visible before we turn it on in the hardware:
+ */
+ smp_wmb();
+
+ if (counter->pmu->enable(counter)) {
+ counter->state = PERF_COUNTER_STATE_INACTIVE;
+ counter->oncpu = -1;
+ return -EAGAIN;
+ }
+
+ counter->tstamp_running += ctx->time - counter->tstamp_stopped;
+
+ if (!is_software_counter(counter))
+ cpuctx->active_oncpu++;
+ ctx->nr_active++;
+
+ if (counter->attr.exclusive)
+ cpuctx->exclusive = 1;
+
+ return 0;
+}
+
+static int
+group_sched_in(struct perf_counter *group_counter,
+ struct perf_cpu_context *cpuctx,
+ struct perf_counter_context *ctx,
+ int cpu)
+{
+ struct perf_counter *counter, *partial_group;
+ int ret;
+
+ if (group_counter->state == PERF_COUNTER_STATE_OFF)
+ return 0;
+
+ ret = hw_perf_group_sched_in(group_counter, cpuctx, ctx, cpu);
+ if (ret)
+ return ret < 0 ? ret : 0;
+
+ if (counter_sched_in(group_counter, cpuctx, ctx, cpu))
+ return -EAGAIN;
+
+ /*
+ * Schedule in siblings as one group (if any):
+ */
+ list_for_each_entry(counter, &group_counter->sibling_list, list_entry) {
+ if (counter_sched_in(counter, cpuctx, ctx, cpu)) {
+ partial_group = counter;
+ goto group_error;
+ }
+ }
+
+ return 0;
+
+group_error:
+ /*
+ * Groups can be scheduled in as one unit only, so undo any
+ * partial group before returning:
+ */
+ list_for_each_entry(counter, &group_counter->sibling_list, list_entry) {
+ if (counter == partial_group)
+ break;
+ counter_sched_out(counter, cpuctx, ctx);
+ }
+ counter_sched_out(group_counter, cpuctx, ctx);
+
+ return -EAGAIN;
+}
+
+/*
+ * Return 1 for a group consisting entirely of software counters,
+ * 0 if the group contains any hardware counters.
+ */
+static int is_software_only_group(struct perf_counter *leader)
+{
+ struct perf_counter *counter;
+
+ if (!is_software_counter(leader))
+ return 0;
+
+ list_for_each_entry(counter, &leader->sibling_list, list_entry)
+ if (!is_software_counter(counter))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Work out whether we can put this counter group on the CPU now.
+ */
+static int group_can_go_on(struct perf_counter *counter,
+ struct perf_cpu_context *cpuctx,
+ int can_add_hw)
+{
+ /*
+ * Groups consisting entirely of software counters can always go on.
+ */
+ if (is_software_only_group(counter))
+ return 1;
+ /*
+ * If an exclusive group is already on, no other hardware
+ * counters can go on.
+ */
+ if (cpuctx->exclusive)
+ return 0;
+ /*
+ * If this group is exclusive and there are already
+ * counters on the CPU, it can't go on.
+ */
+ if (counter->attr.exclusive && cpuctx->active_oncpu)
+ return 0;
+ /*
+ * Otherwise, try to add it if all previous groups were able
+ * to go on.
+ */
+ return can_add_hw;
+}
+
+static void add_counter_to_ctx(struct perf_counter *counter,
+ struct perf_counter_context *ctx)
+{
+ list_add_counter(counter, ctx);
+ counter->tstamp_enabled = ctx->time;
+ counter->tstamp_running = ctx->time;
+ counter->tstamp_stopped = ctx->time;
+}
+
+/*
+ * Cross CPU call to install and enable a performance counter
+ *
+ * Must be called with ctx->mutex held
+ */
+static void __perf_install_in_context(void *info)
+{
+ struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
+ struct perf_counter *counter = info;
+ struct perf_counter_context *ctx = counter->ctx;
+ struct perf_counter *leader = counter->group_leader;
+ int cpu = smp_processor_id();
+ int err;
+
+ /*
+ * If this is a task context, we need to check whether it is
+ * the current task context of this cpu. If not it has been
+ * scheduled out before the smp call arrived.
+ * Or possibly this is the right context but it isn't
+ * on this cpu because it had no counters.
+ */
+ if (ctx->task && cpuctx->task_ctx != ctx) {
+ if (cpuctx->task_ctx || ctx->task != current)
+ return;
+ cpuctx->task_ctx = ctx;
+ }
+
+ spin_lock(&ctx->lock);
+ ctx->is_active = 1;
+ update_context_time(ctx);
+
+ /*
+ * Protect the list operation against NMI by disabling the
+ * counters on a global level. NOP for non NMI based counters.
+ */
+ perf_disable();
+
+ add_counter_to_ctx(counter, ctx);
+
+ /*
+ * Don't put the counter on if it is disabled or if
+ * it is in a group and the group isn't on.
+ */
+ if (counter->state != PERF_COUNTER_STATE_INACTIVE ||
+ (leader != counter && leader->state != PERF_COUNTER_STATE_ACTIVE))
+ goto unlock;
+
+ /*
+ * An exclusive counter can't go on if there are already active
+ * hardware counters, and no hardware counter can go on if there
+ * is already an exclusive counter on.
+ */
+ if (!group_can_go_on(counter, cpuctx, 1))
+ err = -EEXIST;
+ else
+ err = counter_sched_in(counter, cpuctx, ctx, cpu);
+
+ if (err) {
+ /*
+ * This counter couldn't go on. If it is in a group
+ * then we have to pull the whole group off.
+ * If the counter group is pinned then put it in error state.
+ */
+ if (leader != counter)
+ group_sched_out(leader, cpuctx, ctx);
+ if (leader->attr.pinned) {
+ update_group_times(leader);
+ leader->state = PERF_COUNTER_STATE_ERROR;
+ }
+ }
+
+ if (!err && !ctx->task && cpuctx->max_pertask)
+ cpuctx->max_pertask--;
+
+ unlock:
+ perf_enable();
+
+ spin_unlock(&ctx->lock);
+}
+
+/*
+ * Attach a performance counter to a context
+ *
+ * First we add the counter to the list with the hardware enable bit
+ * in counter->hw_config cleared.
+ *
+ * If the counter is attached to a task which is on a CPU we use a smp
+ * call to enable it in the task context. The task might have been
+ * scheduled away, but we check this in the smp call again.
+ *
+ * Must be called with ctx->mutex held.
+ */
+static void
+perf_install_in_context(struct perf_counter_context *ctx,
+ struct perf_counter *counter,
+ int cpu)
+{
+ struct task_struct *task = ctx->task;
+
+ if (!task) {
+ /*
+ * Per cpu counters are installed via an smp call and
+ * the install is always sucessful.
+ */
+ smp_call_function_single(cpu, __perf_install_in_context,
+ counter, 1);
+ return;
+ }
+
+retry:
+ task_oncpu_function_call(task, __perf_install_in_context,
+ counter);
+
+ spin_lock_irq(&ctx->lock);
+ /*
+ * we need to retry the smp call.
+ */
+ if (ctx->is_active && list_empty(&counter->list_entry)) {
+ spin_unlock_irq(&ctx->lock);
+ goto retry;
+ }
+
+ /*
+ * The lock prevents that this context is scheduled in so we
+ * can add the counter safely, if it the call above did not
+ * succeed.
+ */
+ if (list_empty(&counter->list_entry))
+ add_counter_to_ctx(counter, ctx);
+ spin_unlock_irq(&ctx->lock);
+}
+
+/*
+ * Cross CPU call to enable a performance counter
+ */
+static void __perf_counter_enable(void *info)
+{
+ struct perf_counter *counter = info;
+ struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
+ struct perf_counter_context *ctx = counter->ctx;
+ struct perf_counter *leader = counter->group_leader;
+ int err;
+
+ /*
+ * If this is a per-task counter, need to check whether this
+ * counter's task is the current task on this cpu.
+ */
+ if (ctx->task && cpuctx->task_ctx != ctx) {
+ if (cpuctx->task_ctx || ctx->task != current)
+ return;
+ cpuctx->task_ctx = ctx;
+ }
+
+ spin_lock(&ctx->lock);
+ ctx->is_active = 1;
+ update_context_time(ctx);
+
+ if (counter->state >= PERF_COUNTER_STATE_INACTIVE)
+ goto unlock;
+ counter->state = PERF_COUNTER_STATE_INACTIVE;
+ counter->tstamp_enabled = ctx->time - counter->total_time_enabled;
+
+ /*
+ * If the counter is in a group and isn't the group leader,
+ * then don't put it on unless the group is on.
+ */
+ if (leader != counter && leader->state != PERF_COUNTER_STATE_ACTIVE)
+ goto unlock;
+
+ if (!group_can_go_on(counter, cpuctx, 1)) {
+ err = -EEXIST;
+ } else {
+ perf_disable();
+ if (counter == leader)
+ err = group_sched_in(counter, cpuctx, ctx,
+ smp_processor_id());
+ else
+ err = counter_sched_in(counter, cpuctx, ctx,
+ smp_processor_id());
+ perf_enable();
+ }
+
+ if (err) {
+ /*
+ * If this counter can't go on and it's part of a
+ * group, then the whole group has to come off.
+ */
+ if (leader != counter)
+ group_sched_out(leader, cpuctx, ctx);
+ if (leader->attr.pinned) {
+ update_group_times(leader);
+ leader->state = PERF_COUNTER_STATE_ERROR;
+ }
+ }
+
+ unlock:
+ spin_unlock(&ctx->lock);
+}
+
+/*
+ * Enable a counter.
+ *
+ * If counter->ctx is a cloned context, callers must make sure that
+ * every task struct that counter->ctx->task could possibly point to
+ * remains valid. This condition is satisfied when called through
+ * perf_counter_for_each_child or perf_counter_for_each as described
+ * for perf_counter_disable.
+ */
+static void perf_counter_enable(struct perf_counter *counter)
+{
+ struct perf_counter_context *ctx = counter->ctx;
+ struct task_struct *task = ctx->task;
+
+ if (!task) {
+ /*
+ * Enable the counter on the cpu that it's on
+ */
+ smp_call_function_single(counter->cpu, __perf_counter_enable,
+ counter, 1);
+ return;
+ }
+
+ spin_lock_irq(&ctx->lock);
+ if (counter->state >= PERF_COUNTER_STATE_INACTIVE)
+ goto out;
+
+ /*
+ * If the counter is in error state, clear that first.
+ * That way, if we see the counter in error state below, we
+ * know that it has gone back into error state, as distinct
+ * from the task having been scheduled away before the
+ * cross-call arrived.
+ */
+ if (counter->state == PERF_COUNTER_STATE_ERROR)
+ counter->state = PERF_COUNTER_STATE_OFF;
+
+ retry:
+ spin_unlock_irq(&ctx->lock);
+ task_oncpu_function_call(task, __perf_counter_enable, counter);
+
+ spin_lock_irq(&ctx->lock);
+
+ /*
+ * If the context is active and the counter is still off,
+ * we need to retry the cross-call.
+ */
+ if (ctx->is_active && counter->state == PERF_COUNTER_STATE_OFF)
+ goto retry;
+
+ /*
+ * Since we have the lock this context can't be scheduled
+ * in, so we can change the state safely.
+ */
+ if (counter->state == PERF_COUNTER_STATE_OFF) {
+ counter->state = PERF_COUNTER_STATE_INACTIVE;
+ counter->tstamp_enabled =
+ ctx->time - counter->total_time_enabled;
+ }
+ out:
+ spin_unlock_irq(&ctx->lock);
+}
+
+static int perf_counter_refresh(struct perf_counter *counter, int refresh)
+{
+ /*
+ * not supported on inherited counters
+ */
+ if (counter->attr.inherit)
+ return -EINVAL;
+
+ atomic_add(refresh, &counter->event_limit);
+ perf_counter_enable(counter);
+
+ return 0;
+}
+
+void __perf_counter_sched_out(struct perf_counter_context *ctx,
+ struct perf_cpu_context *cpuctx)
+{
+ struct perf_counter *counter;
+
+ spin_lock(&ctx->lock);
+ ctx->is_active = 0;
+ if (likely(!ctx->nr_counters))
+ goto out;
+ update_context_time(ctx);
+
+ perf_disable();
+ if (ctx->nr_active) {
+ list_for_each_entry(counter, &ctx->counter_list, list_entry) {
+ if (counter != counter->group_leader)
+ counter_sched_out(counter, cpuctx, ctx);
+ else
+ group_sched_out(counter, cpuctx, ctx);
+ }
+ }
+ perf_enable();
+ out:
+ spin_unlock(&ctx->lock);
+}
+
+/*
+ * Test whether two contexts are equivalent, i.e. whether they
+ * have both been cloned from the same version of the same context
+ * and they both have the same number of enabled counters.
+ * If the number of enabled counters is the same, then the set
+ * of enabled counters should be the same, because these are both
+ * inherited contexts, therefore we can't access individual counters
+ * in them directly with an fd; we can only enable/disable all
+ * counters via prctl, or enable/disable all counters in a family
+ * via ioctl, which will have the same effect on both contexts.
+ */
+static int context_equiv(struct perf_counter_context *ctx1,
+ struct perf_counter_context *ctx2)
+{
+ return ctx1->parent_ctx && ctx1->parent_ctx == ctx2->parent_ctx
+ && ctx1->parent_gen == ctx2->parent_gen
+ && !ctx1->pin_count && !ctx2->pin_count;
+}
+
+/*
+ * Called from scheduler to remove the counters of the current task,
+ * with interrupts disabled.
+ *
+ * We stop each counter and update the counter value in counter->count.
+ *
+ * This does not protect us against NMI, but disable()
+ * sets the disabled bit in the control field of counter _before_
+ * accessing the counter control register. If a NMI hits, then it will
+ * not restart the counter.
+ */
+void perf_counter_task_sched_out(struct task_struct *task,
+ struct task_struct *next, int cpu)
+{
+ struct perf_cpu_context *cpuctx = &per_cpu(perf_cpu_context, cpu);
+ struct perf_counter_context *ctx = task->perf_counter_ctxp;
+ struct perf_counter_context *next_ctx;
+ struct perf_counter_context *parent;
+ struct pt_regs *regs;
+ int do_switch = 1;
+
+ regs = task_pt_regs(task);
+ perf_swcounter_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 1, regs, 0);
+
+ if (likely(!ctx || !cpuctx->task_ctx))
+ return;
+
+ update_context_time(ctx);
+
+ rcu_read_lock();
+ parent = rcu_dereference(ctx->parent_ctx);
+ next_ctx = next->perf_counter_ctxp;
+ if (parent && next_ctx &&
+ rcu_dereference(next_ctx->parent_ctx) == parent) {
+ /*
+ * Looks like the two contexts are clones, so we might be
+ * able to optimize the context switch. We lock both
+ * contexts and check that they are clones under the
+ * lock (including re-checking that neither has been
+ * uncloned in the meantime). It doesn't matter which
+ * order we take the locks because no other cpu could
+ * be trying to lock both of these tasks.
+ */
+ spin_lock(&ctx->lock);
+ spin_lock_nested(&next_ctx->lock, SINGLE_DEPTH_NESTING);
+ if (context_equiv(ctx, next_ctx)) {
+ /*
+ * XXX do we need a memory barrier of sorts
+ * wrt to rcu_dereference() of perf_counter_ctxp
+ */
+ task->perf_counter_ctxp = next_ctx;
+ next->perf_counter_ctxp = ctx;
+ ctx->task = next;
+ next_ctx->task = task;
+ do_switch = 0;
+ }
+ spin_unlock(&next_ctx->lock);
+ spin_unlock(&ctx->lock);
+ }
+ rcu_read_unlock();
+
+ if (do_switch) {
+ __perf_counter_sched_out(ctx, cpuctx);
+ cpuctx->task_ctx = NULL;
+ }
+}
+
+/*
+ * Called with IRQs disabled
+ */
+static void __perf_counter_task_sched_out(struct perf_counter_context *ctx)
+{
+ struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
+
+ if (!cpuctx->task_ctx)
+ return;
+
+ if (WARN_ON_ONCE(ctx != cpuctx->task_ctx))
+ return;
+
+ __perf_counter_sched_out(ctx, cpuctx);
+ cpuctx->task_ctx = NULL;
+}
+
+/*
+ * Called with IRQs disabled
+ */
+static void perf_counter_cpu_sched_out(struct perf_cpu_context *cpuctx)
+{
+ __perf_counter_sched_out(&cpuctx->ctx, cpuctx);
+}
+
+static void
+__perf_counter_sched_in(struct perf_counter_context *ctx,
+ struct perf_cpu_context *cpuctx, int cpu)
+{
+ struct perf_counter *counter;
+ int can_add_hw = 1;
+
+ spin_lock(&ctx->lock);
+ ctx->is_active = 1;
+ if (likely(!ctx->nr_counters))
+ goto out;
+
+ ctx->timestamp = perf_clock();
+
+ perf_disable();
+
+ /*
+ * First go through the list and put on any pinned groups
+ * in order to give them the best chance of going on.
+ */
+ list_for_each_entry(counter, &ctx->counter_list, list_entry) {
+ if (counter->state <= PERF_COUNTER_STATE_OFF ||
+ !counter->attr.pinned)
+ continue;
+ if (counter->cpu != -1 && counter->cpu != cpu)
+ continue;
+
+ if (counter != counter->group_leader)
+ counter_sched_in(counter, cpuctx, ctx, cpu);
+ else {
+ if (group_can_go_on(counter, cpuctx, 1))
+ group_sched_in(counter, cpuctx, ctx, cpu);
+ }
+
+ /*
+ * If this pinned group hasn't been scheduled,
+ * put it in error state.
+ */
+ if (counter->state == PERF_COUNTER_STATE_INACTIVE) {
+ update_group_times(counter);
+ counter->state = PERF_COUNTER_STATE_ERROR;
+ }
+ }
+
+ list_for_each_entry(counter, &ctx->counter_list, list_entry) {
+ /*
+ * Ignore counters in OFF or ERROR state, and
+ * ignore pinned counters since we did them already.
+ */
+ if (counter->state <= PERF_COUNTER_STATE_OFF ||
+ counter->attr.pinned)
+ continue;
+
+ /*
+ * Listen to the 'cpu' scheduling filter constraint
+ * of counters:
+ */
+ if (counter->cpu != -1 && counter->cpu != cpu)
+ continue;
+
+ if (counter != counter->group_leader) {
+ if (counter_sched_in(counter, cpuctx, ctx, cpu))
+ can_add_hw = 0;
+ } else {
+ if (group_can_go_on(counter, cpuctx, can_add_hw)) {
+ if (group_sched_in(counter, cpuctx, ctx, cpu))
+ can_add_hw = 0;
+ }
+ }
+ }
+ perf_enable();
+ out:
+ spin_unlock(&ctx->lock);
+}
+
+/*
+ * Called from scheduler to add the counters of the current task
+ * with interrupts disabled.
+ *
+ * We restore the counter value and then enable it.
+ *
+ * This does not protect us against NMI, but enable()
+ * sets the enabled bit in the control field of counter _before_
+ * accessing the counter control register. If a NMI hits, then it will
+ * keep the counter running.
+ */
+void perf_counter_task_sched_in(struct task_struct *task, int cpu)
+{
+ struct perf_cpu_context *cpuctx = &per_cpu(perf_cpu_context, cpu);
+ struct perf_counter_context *ctx = task->perf_counter_ctxp;
+
+ if (likely(!ctx))
+ return;
+ if (cpuctx->task_ctx == ctx)
+ return;
+ __perf_counter_sched_in(ctx, cpuctx, cpu);
+ cpuctx->task_ctx = ctx;
+}
+
+static void perf_counter_cpu_sched_in(struct perf_cpu_context *cpuctx, int cpu)
+{
+ struct perf_counter_context *ctx = &cpuctx->ctx;
+
+ __perf_counter_sched_in(ctx, cpuctx, cpu);
+}
+
+#define MAX_INTERRUPTS (~0ULL)
+
+static void perf_log_throttle(struct perf_counter *counter, int enable);
+static void perf_log_period(struct perf_counter *counter, u64 period);
+
+static void perf_adjust_period(struct perf_counter *counter, u64 events)
+{
+ struct hw_perf_counter *hwc = &counter->hw;
+ u64 period, sample_period;
+ s64 delta;
+
+ events *= hwc->sample_period;
+ period = div64_u64(events, counter->attr.sample_freq);
+
+ delta = (s64)(period - hwc->sample_period);
+ delta = (delta + 7) / 8; /* low pass filter */
+
+ sample_period = hwc->sample_period + delta;
+
+ if (!sample_period)
+ sample_period = 1;
+
+ perf_log_period(counter, sample_period);
+
+ hwc->sample_period = sample_period;
+}
+
+static void perf_ctx_adjust_freq(struct perf_counter_context *ctx)
+{
+ struct perf_counter *counter;
+ struct hw_perf_counter *hwc;
+ u64 interrupts, freq;
+
+ spin_lock(&ctx->lock);
+ list_for_each_entry(counter, &ctx->counter_list, list_entry) {
+ if (counter->state != PERF_COUNTER_STATE_ACTIVE)
+ continue;
+
+ hwc = &counter->hw;
+
+ interrupts = hwc->interrupts;
+ hwc->interrupts = 0;
+
+ /*
+ * unthrottle counters on the tick
+ */
+ if (interrupts == MAX_INTERRUPTS) {
+ perf_log_throttle(counter, 1);
+ counter->pmu->unthrottle(counter);
+ interrupts = 2*sysctl_perf_counter_sample_rate/HZ;
+ }
+
+ if (!counter->attr.freq || !counter->attr.sample_freq)
+ continue;
+
+ /*
+ * if the specified freq < HZ then we need to skip ticks
+ */
+ if (counter->attr.sample_freq < HZ) {
+ freq = counter->attr.sample_freq;
+
+ hwc->freq_count += freq;
+ hwc->freq_interrupts += interrupts;
+
+ if (hwc->freq_count < HZ)
+ continue;
+
+ interrupts = hwc->freq_interrupts;
+ hwc->freq_interrupts = 0;
+ hwc->freq_count -= HZ;
+ } else
+ freq = HZ;
+
+ perf_adjust_period(counter, freq * interrupts);
+
+ /*
+ * In order to avoid being stalled by an (accidental) huge
+ * sample period, force reset the sample period if we didn't
+ * get any events in this freq period.
+ */
+ if (!interrupts) {
+ perf_disable();
+ counter->pmu->disable(counter);
+ atomic_set(&hwc->period_left, 0);
+ counter->pmu->enable(counter);
+ perf_enable();
+ }
+ }
+ spin_unlock(&ctx->lock);
+}
+
+/*
+ * Round-robin a context's counters:
+ */
+static void rotate_ctx(struct perf_counter_context *ctx)
+{
+ struct perf_counter *counter;
+
+ if (!ctx->nr_counters)
+ return;
+
+ spin_lock(&ctx->lock);
+ /*
+ * Rotate the first entry last (works just fine for group counters too):
+ */
+ perf_disable();
+ list_for_each_entry(counter, &ctx->counter_list, list_entry) {
+ list_move_tail(&counter->list_entry, &ctx->counter_list);
+ break;
+ }
+ perf_enable();
+
+ spin_unlock(&ctx->lock);
+}
+
+void perf_counter_task_tick(struct task_struct *curr, int cpu)
+{
+ struct perf_cpu_context *cpuctx;
+ struct perf_counter_context *ctx;
+
+ if (!atomic_read(&nr_counters))
+ return;
+
+ cpuctx = &per_cpu(perf_cpu_context, cpu);
+ ctx = curr->perf_counter_ctxp;
+
+ perf_ctx_adjust_freq(&cpuctx->ctx);
+ if (ctx)
+ perf_ctx_adjust_freq(ctx);
+
+ perf_counter_cpu_sched_out(cpuctx);
+ if (ctx)
+ __perf_counter_task_sched_out(ctx);
+
+ rotate_ctx(&cpuctx->ctx);
+ if (ctx)
+ rotate_ctx(ctx);
+
+ perf_counter_cpu_sched_in(cpuctx, cpu);
+ if (ctx)
+ perf_counter_task_sched_in(curr, cpu);
+}
+
+/*
+ * Cross CPU call to read the hardware counter
+ */
+static void __read(void *info)
+{
+ struct perf_counter *counter = info;
+ struct perf_counter_context *ctx = counter->ctx;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ if (ctx->is_active)
+ update_context_time(ctx);
+ counter->pmu->read(counter);
+ update_counter_times(counter);
+ local_irq_restore(flags);
+}
+
+static u64 perf_counter_read(struct perf_counter *counter)
+{
+ /*
+ * If counter is enabled and currently active on a CPU, update the
+ * value in the counter structure:
+ */
+ if (counter->state == PERF_COUNTER_STATE_ACTIVE) {
+ smp_call_function_single(counter->oncpu,
+ __read, counter, 1);
+ } else if (counter->state == PERF_COUNTER_STATE_INACTIVE) {
+ update_counter_times(counter);
+ }
+
+ return atomic64_read(&counter->count);
+}
+
+/*
+ * Initialize the perf_counter context in a task_struct:
+ */
+static void
+__perf_counter_init_context(struct perf_counter_context *ctx,
+ struct task_struct *task)
+{
+ memset(ctx, 0, sizeof(*ctx));
+ spin_lock_init(&ctx->lock);
+ mutex_init(&ctx->mutex);
+ INIT_LIST_HEAD(&ctx->counter_list);
+ INIT_LIST_HEAD(&ctx->event_list);
+ atomic_set(&ctx->refcount, 1);
+ ctx->task = task;
+}
+
+static struct perf_counter_context *find_get_context(pid_t pid, int cpu)
+{
+ struct perf_counter_context *parent_ctx;
+ struct perf_counter_context *ctx;
+ struct perf_cpu_context *cpuctx;
+ struct task_struct *task;
+ unsigned long flags;
+ int err;
+
+ /*
+ * If cpu is not a wildcard then this is a percpu counter:
+ */
+ if (cpu != -1) {
+ /* Must be root to operate on a CPU counter: */
+ if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
+ return ERR_PTR(-EACCES);
+
+ if (cpu < 0 || cpu > num_possible_cpus())
+ return ERR_PTR(-EINVAL);
+
+ /*
+ * We could be clever and allow to attach a counter to an
+ * offline CPU and activate it when the CPU comes up, but
+ * that's for later.
+ */
+ if (!cpu_isset(cpu, cpu_online_map))
+ return ERR_PTR(-ENODEV);
+
+ cpuctx = &per_cpu(perf_cpu_context, cpu);
+ ctx = &cpuctx->ctx;
+ get_ctx(ctx);
+
+ return ctx;
+ }
+
+ rcu_read_lock();
+ if (!pid)
+ task = current;
+ else
+ task = find_task_by_vpid(pid);
+ if (task)
+ get_task_struct(task);
+ rcu_read_unlock();
+
+ if (!task)
+ return ERR_PTR(-ESRCH);
+
+ /*
+ * Can't attach counters to a dying task.
+ */
+ err = -ESRCH;
+ if (task->flags & PF_EXITING)
+ goto errout;
+
+ /* Reuse ptrace permission checks for now. */
+ err = -EACCES;
+ if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ goto errout;
+
+ retry:
+ ctx = perf_lock_task_context(task, &flags);
+ if (ctx) {
+ parent_ctx = ctx->parent_ctx;
+ if (parent_ctx) {
+ put_ctx(parent_ctx);
+ ctx->parent_ctx = NULL; /* no longer a clone */
+ }
+ /*
+ * Get an extra reference before dropping the lock so that
+ * this context won't get freed if the task exits.
+ */
+ get_ctx(ctx);
+ spin_unlock_irqrestore(&ctx->lock, flags);
+ }
+
+ if (!ctx) {
+ ctx = kmalloc(sizeof(struct perf_counter_context), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!ctx)
+ goto errout;
+ __perf_counter_init_context(ctx, task);
+ get_ctx(ctx);
+ if (cmpxchg(&task->perf_counter_ctxp, NULL, ctx)) {
+ /*
+ * We raced with some other task; use
+ * the context they set.
+ */
+ kfree(ctx);
+ goto retry;
+ }
+ get_task_struct(task);
+ }
+
+ put_task_struct(task);
+ return ctx;
+
+ errout:
+ put_task_struct(task);
+ return ERR_PTR(err);
+}
+
+static void free_counter_rcu(struct rcu_head *head)
+{
+ struct perf_counter *counter;
+
+ counter = container_of(head, struct perf_counter, rcu_head);
+ if (counter->ns)
+ put_pid_ns(counter->ns);
+ kfree(counter);
+}
+
+static void perf_pending_sync(struct perf_counter *counter);
+
+static void free_counter(struct perf_counter *counter)
+{
+ perf_pending_sync(counter);
+
+ atomic_dec(&nr_counters);
+ if (counter->attr.mmap)
+ atomic_dec(&nr_mmap_counters);
+ if (counter->attr.comm)
+ atomic_dec(&nr_comm_counters);
+
+ if (counter->destroy)
+ counter->destroy(counter);
+
+ put_ctx(counter->ctx);
+ call_rcu(&counter->rcu_head, free_counter_rcu);
+}
+
+/*
+ * Called when the last reference to the file is gone.
+ */
+static int perf_release(struct inode *inode, struct file *file)
+{
+ struct perf_counter *counter = file->private_data;
+ struct perf_counter_context *ctx = counter->ctx;
+
+ file->private_data = NULL;
+
+ WARN_ON_ONCE(ctx->parent_ctx);
+ mutex_lock(&ctx->mutex);
+ perf_counter_remove_from_context(counter);
+ mutex_unlock(&ctx->mutex);
+
+ mutex_lock(&counter->owner->perf_counter_mutex);
+ list_del_init(&counter->owner_entry);
+ mutex_unlock(&counter->owner->perf_counter_mutex);
+ put_task_struct(counter->owner);
+
+ free_counter(counter);
+
+ return 0;
+}
+
+/*
+ * Read the performance counter - simple non blocking version for now
+ */
+static ssize_t
+perf_read_hw(struct perf_counter *counter, char __user *buf, size_t count)
+{
+ u64 values[3];
+ int n;
+
+ /*
+ * Return end-of-file for a read on a counter that is in
+ * error state (i.e. because it was pinned but it couldn't be
+ * scheduled on to the CPU at some point).
+ */
+ if (counter->state == PERF_COUNTER_STATE_ERROR)
+ return 0;
+
+ WARN_ON_ONCE(counter->ctx->parent_ctx);
+ mutex_lock(&counter->child_mutex);
+ values[0] = perf_counter_read(counter);
+ n = 1;
+ if (counter->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+ values[n++] = counter->total_time_enabled +
+ atomic64_read(&counter->child_total_time_enabled);
+ if (counter->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+ values[n++] = counter->total_time_running +
+ atomic64_read(&counter->child_total_time_running);
+ if (counter->attr.read_format & PERF_FORMAT_ID)
+ values[n++] = counter->id;
+ mutex_unlock(&counter->child_mutex);
+
+ if (count < n * sizeof(u64))
+ return -EINVAL;
+ count = n * sizeof(u64);
+
+ if (copy_to_user(buf, values, count))
+ return -EFAULT;
+
+ return count;
+}
+
+static ssize_t
+perf_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+{
+ struct perf_counter *counter = file->private_data;
+
+ return perf_read_hw(counter, buf, count);
+}
+
+static unsigned int perf_poll(struct file *file, poll_table *wait)
+{
+ struct perf_counter *counter = file->private_data;
+ struct perf_mmap_data *data;
+ unsigned int events = POLL_HUP;
+
+ rcu_read_lock();
+ data = rcu_dereference(counter->data);
+ if (data)
+ events = atomic_xchg(&data->poll, 0);
+ rcu_read_unlock();
+
+ poll_wait(file, &counter->waitq, wait);
+
+ return events;
+}
+
+static void perf_counter_reset(struct perf_counter *counter)
+{
+ (void)perf_counter_read(counter);
+ atomic64_set(&counter->count, 0);
+ perf_counter_update_userpage(counter);
+}
+
+static void perf_counter_for_each_sibling(struct perf_counter *counter,
+ void (*func)(struct perf_counter *))
+{
+ struct perf_counter_context *ctx = counter->ctx;
+ struct perf_counter *sibling;
+
+ WARN_ON_ONCE(ctx->parent_ctx);
+ mutex_lock(&ctx->mutex);
+ counter = counter->group_leader;
+
+ func(counter);
+ list_for_each_entry(sibling, &counter->sibling_list, list_entry)
+ func(sibling);
+ mutex_unlock(&ctx->mutex);
+}
+
+/*
+ * Holding the top-level counter's child_mutex means that any
+ * descendant process that has inherited this counter will block
+ * in sync_child_counter if it goes to exit, thus satisfying the
+ * task existence requirements of perf_counter_enable/disable.
+ */
+static void perf_counter_for_each_child(struct perf_counter *counter,
+ void (*func)(struct perf_counter *))
+{
+ struct perf_counter *child;
+
+ WARN_ON_ONCE(counter->ctx->parent_ctx);
+ mutex_lock(&counter->child_mutex);
+ func(counter);
+ list_for_each_entry(child, &counter->child_list, child_list)
+ func(child);
+ mutex_unlock(&counter->child_mutex);
+}
+
+static void perf_counter_for_each(struct perf_counter *counter,
+ void (*func)(struct perf_counter *))
+{
+ struct perf_counter *child;
+
+ WARN_ON_ONCE(counter->ctx->parent_ctx);
+ mutex_lock(&counter->child_mutex);
+ perf_counter_for_each_sibling(counter, func);
+ list_for_each_entry(child, &counter->child_list, child_list)
+ perf_counter_for_each_sibling(child, func);
+ mutex_unlock(&counter->child_mutex);
+}
+
+static int perf_counter_period(struct perf_counter *counter, u64 __user *arg)
+{
+ struct perf_counter_context *ctx = counter->ctx;
+ unsigned long size;
+ int ret = 0;
+ u64 value;
+
+ if (!counter->attr.sample_period)
+ return -EINVAL;
+
+ size = copy_from_user(&value, arg, sizeof(value));
+ if (size != sizeof(value))
+ return -EFAULT;
+
+ if (!value)
+ return -EINVAL;
+
+ spin_lock_irq(&ctx->lock);
+ if (counter->attr.freq) {
+ if (value > sysctl_perf_counter_sample_rate) {
+ ret = -EINVAL;
+ goto unlock;
+ }
+
+ counter->attr.sample_freq = value;
+ } else {
+ perf_log_period(counter, value);
+
+ counter->attr.sample_period = value;
+ counter->hw.sample_period = value;
+ }
+unlock:
+ spin_unlock_irq(&ctx->lock);
+
+ return ret;
+}
+
+static long perf_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct perf_counter *counter = file->private_data;
+ void (*func)(struct perf_counter *);
+ u32 flags = arg;
+
+ switch (cmd) {
+ case PERF_COUNTER_IOC_ENABLE:
+ func = perf_counter_enable;
+ break;
+ case PERF_COUNTER_IOC_DISABLE:
+ func = perf_counter_disable;
+ break;
+ case PERF_COUNTER_IOC_RESET:
+ func = perf_counter_reset;
+ break;
+
+ case PERF_COUNTER_IOC_REFRESH:
+ return perf_counter_refresh(counter, arg);
+
+ case PERF_COUNTER_IOC_PERIOD:
+ return perf_counter_period(counter, (u64 __user *)arg);
+
+ default:
+ return -ENOTTY;
+ }
+
+ if (flags & PERF_IOC_FLAG_GROUP)
+ perf_counter_for_each(counter, func);
+ else
+ perf_counter_for_each_child(counter, func);
+
+ return 0;
+}
+
+int perf_counter_task_enable(void)
+{
+ struct perf_counter *counter;
+
+ mutex_lock(¤t->perf_counter_mutex);
+ list_for_each_entry(counter, ¤t->perf_counter_list, owner_entry)
+ perf_counter_for_each_child(counter, perf_counter_enable);
+ mutex_unlock(¤t->perf_counter_mutex);
+
+ return 0;
+}
+
+int perf_counter_task_disable(void)
+{
+ struct perf_counter *counter;
+
+ mutex_lock(¤t->perf_counter_mutex);
+ list_for_each_entry(counter, ¤t->perf_counter_list, owner_entry)
+ perf_counter_for_each_child(counter, perf_counter_disable);
+ mutex_unlock(¤t->perf_counter_mutex);
+
+ return 0;
+}
+
+/*
+ * Callers need to ensure there can be no nesting of this function, otherwise
+ * the seqlock logic goes bad. We can not serialize this because the arch
+ * code calls this from NMI context.
+ */
+void perf_counter_update_userpage(struct perf_counter *counter)
+{
+ struct perf_counter_mmap_page *userpg;
+ struct perf_mmap_data *data;
+
+ rcu_read_lock();
+ data = rcu_dereference(counter->data);
+ if (!data)
+ goto unlock;
+
+ userpg = data->user_page;
+
+ /*
+ * Disable preemption so as to not let the corresponding user-space
+ * spin too long if we get preempted.
+ */
+ preempt_disable();
+ ++userpg->lock;
+ barrier();
+ userpg->index = counter->hw.idx;
+ userpg->offset = atomic64_read(&counter->count);
+ if (counter->state == PERF_COUNTER_STATE_ACTIVE)
+ userpg->offset -= atomic64_read(&counter->hw.prev_count);
+
+ barrier();
+ ++userpg->lock;
+ preempt_enable();
+unlock:
+ rcu_read_unlock();
+}
+
+static int perf_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct perf_counter *counter = vma->vm_file->private_data;
+ struct perf_mmap_data *data;
+ int ret = VM_FAULT_SIGBUS;
+
+ rcu_read_lock();
+ data = rcu_dereference(counter->data);
+ if (!data)
+ goto unlock;
+
+ if (vmf->pgoff == 0) {
+ vmf->page = virt_to_page(data->user_page);
+ } else {
+ int nr = vmf->pgoff - 1;
+
+ if ((unsigned)nr > data->nr_pages)
+ goto unlock;
+
+ vmf->page = virt_to_page(data->data_pages[nr]);
+ }
+ get_page(vmf->page);
+ ret = 0;
+unlock:
+ rcu_read_unlock();
+
+ return ret;
+}
+
+static int perf_mmap_data_alloc(struct perf_counter *counter, int nr_pages)
+{
+ struct perf_mmap_data *data;
+ unsigned long size;
+ int i;
+
+ WARN_ON(atomic_read(&counter->mmap_count));
+
+ size = sizeof(struct perf_mmap_data);
+ size += nr_pages * sizeof(void *);
+
+ data = kzalloc(size, GFP_KERNEL);
+ if (!data)
+ goto fail;
+
+ data->user_page = (void *)get_zeroed_page(GFP_KERNEL);
+ if (!data->user_page)
+ goto fail_user_page;
+
+ for (i = 0; i < nr_pages; i++) {
+ data->data_pages[i] = (void *)get_zeroed_page(GFP_KERNEL);
+ if (!data->data_pages[i])
+ goto fail_data_pages;
+ }
+
+ data->nr_pages = nr_pages;
+ atomic_set(&data->lock, -1);
+
+ rcu_assign_pointer(counter->data, data);
+
+ return 0;
+
+fail_data_pages:
+ for (i--; i >= 0; i--)
+ free_page((unsigned long)data->data_pages[i]);
+
+ free_page((unsigned long)data->user_page);
+
+fail_user_page:
+ kfree(data);
+
+fail:
+ return -ENOMEM;
+}
+
+static void __perf_mmap_data_free(struct rcu_head *rcu_head)
+{
+ struct perf_mmap_data *data;
+ int i;
+
+ data = container_of(rcu_head, struct perf_mmap_data, rcu_head);
+
+ free_page((unsigned long)data->user_page);
+ for (i = 0; i < data->nr_pages; i++)
+ free_page((unsigned long)data->data_pages[i]);
+ kfree(data);
+}
+
+static void perf_mmap_data_free(struct perf_counter *counter)
+{
+ struct perf_mmap_data *data = counter->data;
+
+ WARN_ON(atomic_read(&counter->mmap_count));
+
+ rcu_assign_pointer(counter->data, NULL);
+ call_rcu(&data->rcu_head, __perf_mmap_data_free);
+}
+
+static void perf_mmap_open(struct vm_area_struct *vma)
+{
+ struct perf_counter *counter = vma->vm_file->private_data;
+
+ atomic_inc(&counter->mmap_count);
+}
+
+static void perf_mmap_close(struct vm_area_struct *vma)
+{
+ struct perf_counter *counter = vma->vm_file->private_data;
+
+ WARN_ON_ONCE(counter->ctx->parent_ctx);
+ if (atomic_dec_and_mutex_lock(&counter->mmap_count, &counter->mmap_mutex)) {
+ struct user_struct *user = current_user();
+
+ atomic_long_sub(counter->data->nr_pages + 1, &user->locked_vm);
+ vma->vm_mm->locked_vm -= counter->data->nr_locked;
+ perf_mmap_data_free(counter);
+ mutex_unlock(&counter->mmap_mutex);
+ }
+}
+
+static struct vm_operations_struct perf_mmap_vmops = {
+ .open = perf_mmap_open,
+ .close = perf_mmap_close,
+ .fault = perf_mmap_fault,
+};
+
+static int perf_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct perf_counter *counter = file->private_data;
+ unsigned long user_locked, user_lock_limit;
+ struct user_struct *user = current_user();
+ unsigned long locked, lock_limit;
+ unsigned long vma_size;
+ unsigned long nr_pages;
+ long user_extra, extra;
+ int ret = 0;
+
+ if (!(vma->vm_flags & VM_SHARED) || (vma->vm_flags & VM_WRITE))
+ return -EINVAL;
+
+ vma_size = vma->vm_end - vma->vm_start;
+ nr_pages = (vma_size / PAGE_SIZE) - 1;
+
+ /*
+ * If we have data pages ensure they're a power-of-two number, so we
+ * can do bitmasks instead of modulo.
+ */
+ if (nr_pages != 0 && !is_power_of_2(nr_pages))
+ return -EINVAL;
+
+ if (vma_size != PAGE_SIZE * (1 + nr_pages))
+ return -EINVAL;
+
+ if (vma->vm_pgoff != 0)
+ return -EINVAL;
+
+ WARN_ON_ONCE(counter->ctx->parent_ctx);
+ mutex_lock(&counter->mmap_mutex);
+ if (atomic_inc_not_zero(&counter->mmap_count)) {
+ if (nr_pages != counter->data->nr_pages)
+ ret = -EINVAL;
+ goto unlock;
+ }
+
+ user_extra = nr_pages + 1;
+ user_lock_limit = sysctl_perf_counter_mlock >> (PAGE_SHIFT - 10);
+
+ /*
+ * Increase the limit linearly with more CPUs:
+ */
+ user_lock_limit *= num_online_cpus();
+
+ user_locked = atomic_long_read(&user->locked_vm) + user_extra;
+
+ extra = 0;
+ if (user_locked > user_lock_limit)
+ extra = user_locked - user_lock_limit;
+
+ lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
+ lock_limit >>= PAGE_SHIFT;
+ locked = vma->vm_mm->locked_vm + extra;
+
+ if ((locked > lock_limit) && !capable(CAP_IPC_LOCK)) {
+ ret = -EPERM;
+ goto unlock;
+ }
+
+ WARN_ON(counter->data);
+ ret = perf_mmap_data_alloc(counter, nr_pages);
+ if (ret)
+ goto unlock;
+
+ atomic_set(&counter->mmap_count, 1);
+ atomic_long_add(user_extra, &user->locked_vm);
+ vma->vm_mm->locked_vm += extra;
+ counter->data->nr_locked = extra;
+unlock:
+ mutex_unlock(&counter->mmap_mutex);
+
+ vma->vm_flags &= ~VM_MAYWRITE;
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_ops = &perf_mmap_vmops;
+
+ return ret;
+}
+
+static int perf_fasync(int fd, struct file *filp, int on)
+{
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct perf_counter *counter = filp->private_data;
+ int retval;
+
+ mutex_lock(&inode->i_mutex);
+ retval = fasync_helper(fd, filp, on, &counter->fasync);
+ mutex_unlock(&inode->i_mutex);
+
+ if (retval < 0)
+ return retval;
+
+ return 0;
+}
+
+static const struct file_operations perf_fops = {
+ .release = perf_release,
+ .read = perf_read,
+ .poll = perf_poll,
+ .unlocked_ioctl = perf_ioctl,
+ .compat_ioctl = perf_ioctl,
+ .mmap = perf_mmap,
+ .fasync = perf_fasync,
+};
+
+/*
+ * Perf counter wakeup
+ *
+ * If there's data, ensure we set the poll() state and publish everything
+ * to user-space before waking everybody up.
+ */
+
+void perf_counter_wakeup(struct perf_counter *counter)
+{
+ wake_up_all(&counter->waitq);
+
+ if (counter->pending_kill) {
+ kill_fasync(&counter->fasync, SIGIO, counter->pending_kill);
+ counter->pending_kill = 0;
+ }
+}
+
+/*
+ * Pending wakeups
+ *
+ * Handle the case where we need to wakeup up from NMI (or rq->lock) context.
+ *
+ * The NMI bit means we cannot possibly take locks. Therefore, maintain a
+ * single linked list and use cmpxchg() to add entries lockless.
+ */
+
+static void perf_pending_counter(struct perf_pending_entry *entry)
+{
+ struct perf_counter *counter = container_of(entry,
+ struct perf_counter, pending);
+
+ if (counter->pending_disable) {
+ counter->pending_disable = 0;
+ perf_counter_disable(counter);
+ }
+
+ if (counter->pending_wakeup) {
+ counter->pending_wakeup = 0;
+ perf_counter_wakeup(counter);
+ }
+}
+
+#define PENDING_TAIL ((struct perf_pending_entry *)-1UL)
+
+static DEFINE_PER_CPU(struct perf_pending_entry *, perf_pending_head) = {
+ PENDING_TAIL,
+};
+
+static void perf_pending_queue(struct perf_pending_entry *entry,
+ void (*func)(struct perf_pending_entry *))
+{
+ struct perf_pending_entry **head;
+
+ if (cmpxchg(&entry->next, NULL, PENDING_TAIL) != NULL)
+ return;
+
+ entry->func = func;
+
+ head = &get_cpu_var(perf_pending_head);
+
+ do {
+ entry->next = *head;
+ } while (cmpxchg(head, entry->next, entry) != entry->next);
+
+ set_perf_counter_pending();
+
+ put_cpu_var(perf_pending_head);
+}
+
+static int __perf_pending_run(void)
+{
+ struct perf_pending_entry *list;
+ int nr = 0;
+
+ list = xchg(&__get_cpu_var(perf_pending_head), PENDING_TAIL);
+ while (list != PENDING_TAIL) {
+ void (*func)(struct perf_pending_entry *);
+ struct perf_pending_entry *entry = list;
+
+ list = list->next;
+
+ func = entry->func;
+ entry->next = NULL;
+ /*
+ * Ensure we observe the unqueue before we issue the wakeup,
+ * so that we won't be waiting forever.
+ * -- see perf_not_pending().
+ */
+ smp_wmb();
+
+ func(entry);
+ nr++;
+ }
+
+ return nr;
+}
+
+static inline int perf_not_pending(struct perf_counter *counter)
+{
+ /*
+ * If we flush on whatever cpu we run, there is a chance we don't
+ * need to wait.
+ */
+ get_cpu();
+ __perf_pending_run();
+ put_cpu();
+
+ /*
+ * Ensure we see the proper queue state before going to sleep
+ * so that we do not miss the wakeup. -- see perf_pending_handle()
+ */
+ smp_rmb();
+ return counter->pending.next == NULL;
+}
+
+static void perf_pending_sync(struct perf_counter *counter)
+{
+ wait_event(counter->waitq, perf_not_pending(counter));
+}
+
+void perf_counter_do_pending(void)
+{
+ __perf_pending_run();
+}
+
+/*
+ * Callchain support -- arch specific
+ */
+
+__weak struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
+{
+ return NULL;
+}
+
+/*
+ * Output
+ */
+
+struct perf_output_handle {
+ struct perf_counter *counter;
+ struct perf_mmap_data *data;
+ unsigned long head;
+ unsigned long offset;
+ int nmi;
+ int overflow;
+ int locked;
+ unsigned long flags;
+};
+
+static void perf_output_wakeup(struct perf_output_handle *handle)
+{
+ atomic_set(&handle->data->poll, POLL_IN);
+
+ if (handle->nmi) {
+ handle->counter->pending_wakeup = 1;
+ perf_pending_queue(&handle->counter->pending,
+ perf_pending_counter);
+ } else
+ perf_counter_wakeup(handle->counter);
+}
+
+/*
+ * Curious locking construct.
+ *
+ * We need to ensure a later event doesn't publish a head when a former
+ * event isn't done writing. However since we need to deal with NMIs we
+ * cannot fully serialize things.
+ *
+ * What we do is serialize between CPUs so we only have to deal with NMI
+ * nesting on a single CPU.
+ *
+ * We only publish the head (and generate a wakeup) when the outer-most
+ * event completes.
+ */
+static void perf_output_lock(struct perf_output_handle *handle)
+{
+ struct perf_mmap_data *data = handle->data;
+ int cpu;
+
+ handle->locked = 0;
+
+ local_irq_save(handle->flags);
+ cpu = smp_processor_id();
+
+ if (in_nmi() && atomic_read(&data->lock) == cpu)
+ return;
+
+ while (atomic_cmpxchg(&data->lock, -1, cpu) != -1)
+ cpu_relax();
+
+ handle->locked = 1;
+}
+
+static void perf_output_unlock(struct perf_output_handle *handle)
+{
+ struct perf_mmap_data *data = handle->data;
+ unsigned long head;
+ int cpu;
+
+ data->done_head = data->head;
+
+ if (!handle->locked)
+ goto out;
+
+again:
+ /*
+ * The xchg implies a full barrier that ensures all writes are done
+ * before we publish the new head, matched by a rmb() in userspace when
+ * reading this position.
+ */
+ while ((head = atomic_long_xchg(&data->done_head, 0)))
+ data->user_page->data_head = head;
+
+ /*
+ * NMI can happen here, which means we can miss a done_head update.
+ */
+
+ cpu = atomic_xchg(&data->lock, -1);
+ WARN_ON_ONCE(cpu != smp_processor_id());
+
+ /*
+ * Therefore we have to validate we did not indeed do so.
+ */
+ if (unlikely(atomic_long_read(&data->done_head))) {
+ /*
+ * Since we had it locked, we can lock it again.
+ */
+ while (atomic_cmpxchg(&data->lock, -1, cpu) != -1)
+ cpu_relax();
+
+ goto again;
+ }
+
+ if (atomic_xchg(&data->wakeup, 0))
+ perf_output_wakeup(handle);
+out:
+ local_irq_restore(handle->flags);
+}
+
+static int perf_output_begin(struct perf_output_handle *handle,
+ struct perf_counter *counter, unsigned int size,
+ int nmi, int overflow)
+{
+ struct perf_mmap_data *data;
+ unsigned int offset, head;
+
+ /*
+ * For inherited counters we send all the output towards the parent.
+ */
+ if (counter->parent)
+ counter = counter->parent;
+
+ rcu_read_lock();
+ data = rcu_dereference(counter->data);
+ if (!data)
+ goto out;
+
+ handle->data = data;
+ handle->counter = counter;
+ handle->nmi = nmi;
+ handle->overflow = overflow;
+
+ if (!data->nr_pages)
+ goto fail;
+
+ perf_output_lock(handle);
+
+ do {
+ offset = head = atomic_long_read(&data->head);
+ head += size;
+ } while (atomic_long_cmpxchg(&data->head, offset, head) != offset);
+
+ handle->offset = offset;
+ handle->head = head;
+
+ if ((offset >> PAGE_SHIFT) != (head >> PAGE_SHIFT))
+ atomic_set(&data->wakeup, 1);
+
+ return 0;
+
+fail:
+ perf_output_wakeup(handle);
+out:
+ rcu_read_unlock();
+
+ return -ENOSPC;
+}
+
+static void perf_output_copy(struct perf_output_handle *handle,
+ const void *buf, unsigned int len)
+{
+ unsigned int pages_mask;
+ unsigned int offset;
+ unsigned int size;
+ void **pages;
+
+ offset = handle->offset;
+ pages_mask = handle->data->nr_pages - 1;
+ pages = handle->data->data_pages;
+
+ do {
+ unsigned int page_offset;
+ int nr;
+
+ nr = (offset >> PAGE_SHIFT) & pages_mask;
+ page_offset = offset & (PAGE_SIZE - 1);
+ size = min_t(unsigned int, PAGE_SIZE - page_offset, len);
+
+ memcpy(pages[nr] + page_offset, buf, size);
+
+ len -= size;
+ buf += size;
+ offset += size;
+ } while (len);
+
+ handle->offset = offset;
+
+ /*
+ * Check we didn't copy past our reservation window, taking the
+ * possible unsigned int wrap into account.
+ */
+ WARN_ON_ONCE(((long)(handle->head - handle->offset)) < 0);
+}
+
+#define perf_output_put(handle, x) \
+ perf_output_copy((handle), &(x), sizeof(x))
+
+static void perf_output_end(struct perf_output_handle *handle)
+{
+ struct perf_counter *counter = handle->counter;
+ struct perf_mmap_data *data = handle->data;
+
+ int wakeup_events = counter->attr.wakeup_events;
+
+ if (handle->overflow && wakeup_events) {
+ int events = atomic_inc_return(&data->events);
+ if (events >= wakeup_events) {
+ atomic_sub(wakeup_events, &data->events);
+ atomic_set(&data->wakeup, 1);
+ }
+ }
+
+ perf_output_unlock(handle);
+ rcu_read_unlock();
+}
+
+static u32 perf_counter_pid(struct perf_counter *counter, struct task_struct *p)
+{
+ /*
+ * only top level counters have the pid namespace they were created in
+ */
+ if (counter->parent)
+ counter = counter->parent;
+
+ return task_tgid_nr_ns(p, counter->ns);
+}
+
+static u32 perf_counter_tid(struct perf_counter *counter, struct task_struct *p)
+{
+ /*
+ * only top level counters have the pid namespace they were created in
+ */
+ if (counter->parent)
+ counter = counter->parent;
+
+ return task_pid_nr_ns(p, counter->ns);
+}
+
+static void perf_counter_output(struct perf_counter *counter, int nmi,
+ struct perf_sample_data *data)
+{
+ int ret;
+ u64 sample_type = counter->attr.sample_type;
+ struct perf_output_handle handle;
+ struct perf_event_header header;
+ u64 ip;
+ struct {
+ u32 pid, tid;
+ } tid_entry;
+ struct {
+ u64 id;
+ u64 counter;
+ } group_entry;
+ struct perf_callchain_entry *callchain = NULL;
+ int callchain_size = 0;
+ u64 time;
+ struct {
+ u32 cpu, reserved;
+ } cpu_entry;
+
+ header.type = 0;
+ header.size = sizeof(header);
+
+ header.misc = PERF_EVENT_MISC_OVERFLOW;
+ header.misc |= perf_misc_flags(data->regs);
+
+ if (sample_type & PERF_SAMPLE_IP) {
+ ip = perf_instruction_pointer(data->regs);
+ header.type |= PERF_SAMPLE_IP;
+ header.size += sizeof(ip);
+ }
+
+ if (sample_type & PERF_SAMPLE_TID) {
+ /* namespace issues */
+ tid_entry.pid = perf_counter_pid(counter, current);
+ tid_entry.tid = perf_counter_tid(counter, current);
+
+ header.type |= PERF_SAMPLE_TID;
+ header.size += sizeof(tid_entry);
+ }
+
+ if (sample_type & PERF_SAMPLE_TIME) {
+ /*
+ * Maybe do better on x86 and provide cpu_clock_nmi()
+ */
+ time = sched_clock();
+
+ header.type |= PERF_SAMPLE_TIME;
+ header.size += sizeof(u64);
+ }
+
+ if (sample_type & PERF_SAMPLE_ADDR) {
+ header.type |= PERF_SAMPLE_ADDR;
+ header.size += sizeof(u64);
+ }
+
+ if (sample_type & PERF_SAMPLE_ID) {
+ header.type |= PERF_SAMPLE_ID;
+ header.size += sizeof(u64);
+ }
+
+ if (sample_type & PERF_SAMPLE_CPU) {
+ header.type |= PERF_SAMPLE_CPU;
+ header.size += sizeof(cpu_entry);
+
+ cpu_entry.cpu = raw_smp_processor_id();
+ }
+
+ if (sample_type & PERF_SAMPLE_PERIOD) {
+ header.type |= PERF_SAMPLE_PERIOD;
+ header.size += sizeof(u64);
+ }
+
+ if (sample_type & PERF_SAMPLE_GROUP) {
+ header.type |= PERF_SAMPLE_GROUP;
+ header.size += sizeof(u64) +
+ counter->nr_siblings * sizeof(group_entry);
+ }
+
+ if (sample_type & PERF_SAMPLE_CALLCHAIN) {
+ callchain = perf_callchain(data->regs);
+
+ if (callchain) {
+ callchain_size = (1 + callchain->nr) * sizeof(u64);
+
+ header.type |= PERF_SAMPLE_CALLCHAIN;
+ header.size += callchain_size;
+ }
+ }
+
+ ret = perf_output_begin(&handle, counter, header.size, nmi, 1);
+ if (ret)
+ return;
+
+ perf_output_put(&handle, header);
+
+ if (sample_type & PERF_SAMPLE_IP)
+ perf_output_put(&handle, ip);
+
+ if (sample_type & PERF_SAMPLE_TID)
+ perf_output_put(&handle, tid_entry);
+
+ if (sample_type & PERF_SAMPLE_TIME)
+ perf_output_put(&handle, time);
+
+ if (sample_type & PERF_SAMPLE_ADDR)
+ perf_output_put(&handle, data->addr);
+
+ if (sample_type & PERF_SAMPLE_ID)
+ perf_output_put(&handle, counter->id);
+
+ if (sample_type & PERF_SAMPLE_CPU)
+ perf_output_put(&handle, cpu_entry);
+
+ if (sample_type & PERF_SAMPLE_PERIOD)
+ perf_output_put(&handle, data->period);
+
+ /*
+ * XXX PERF_SAMPLE_GROUP vs inherited counters seems difficult.
+ */
+ if (sample_type & PERF_SAMPLE_GROUP) {
+ struct perf_counter *leader, *sub;
+ u64 nr = counter->nr_siblings;
+
+ perf_output_put(&handle, nr);
+
+ leader = counter->group_leader;
+ list_for_each_entry(sub, &leader->sibling_list, list_entry) {
+ if (sub != counter)
+ sub->pmu->read(sub);
+
+ group_entry.id = sub->id;
+ group_entry.counter = atomic64_read(&sub->count);
+
+ perf_output_put(&handle, group_entry);
+ }
+ }
+
+ if (callchain)
+ perf_output_copy(&handle, callchain, callchain_size);
+
+ perf_output_end(&handle);
+}
+
+/*
+ * fork tracking
+ */
+
+struct perf_fork_event {
+ struct task_struct *task;
+
+ struct {
+ struct perf_event_header header;
+
+ u32 pid;
+ u32 ppid;
+ } event;
+};
+
+static void perf_counter_fork_output(struct perf_counter *counter,
+ struct perf_fork_event *fork_event)
+{
+ struct perf_output_handle handle;
+ int size = fork_event->event.header.size;
+ struct task_struct *task = fork_event->task;
+ int ret = perf_output_begin(&handle, counter, size, 0, 0);
+
+ if (ret)
+ return;
+
+ fork_event->event.pid = perf_counter_pid(counter, task);
+ fork_event->event.ppid = perf_counter_pid(counter, task->real_parent);
+
+ perf_output_put(&handle, fork_event->event);
+ perf_output_end(&handle);
+}
+
+static int perf_counter_fork_match(struct perf_counter *counter)
+{
+ if (counter->attr.comm || counter->attr.mmap)
+ return 1;
+
+ return 0;
+}
+
+static void perf_counter_fork_ctx(struct perf_counter_context *ctx,
+ struct perf_fork_event *fork_event)
+{
+ struct perf_counter *counter;
+
+ if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(counter, &ctx->event_list, event_entry) {
+ if (perf_counter_fork_match(counter))
+ perf_counter_fork_output(counter, fork_event);
+ }
+ rcu_read_unlock();
+}
+
+static void perf_counter_fork_event(struct perf_fork_event *fork_event)
+{
+ struct perf_cpu_context *cpuctx;
+ struct perf_counter_context *ctx;
+
+ cpuctx = &get_cpu_var(perf_cpu_context);
+ perf_counter_fork_ctx(&cpuctx->ctx, fork_event);
+ put_cpu_var(perf_cpu_context);
+
+ rcu_read_lock();
+ /*
+ * doesn't really matter which of the child contexts the
+ * events ends up in.
+ */
+ ctx = rcu_dereference(current->perf_counter_ctxp);
+ if (ctx)
+ perf_counter_fork_ctx(ctx, fork_event);
+ rcu_read_unlock();
+}
+
+void perf_counter_fork(struct task_struct *task)
+{
+ struct perf_fork_event fork_event;
+
+ if (!atomic_read(&nr_comm_counters) &&
+ !atomic_read(&nr_mmap_counters))
+ return;
+
+ fork_event = (struct perf_fork_event){
+ .task = task,
+ .event = {
+ .header = {
+ .type = PERF_EVENT_FORK,
+ .size = sizeof(fork_event.event),
+ },
+ },
+ };
+
+ perf_counter_fork_event(&fork_event);
+}
+
+/*
+ * comm tracking
+ */
+
+struct perf_comm_event {
+ struct task_struct *task;
+ char *comm;
+ int comm_size;
+
+ struct {
+ struct perf_event_header header;
+
+ u32 pid;
+ u32 tid;
+ } event;
+};
+
+static void perf_counter_comm_output(struct perf_counter *counter,
+ struct perf_comm_event *comm_event)
+{
+ struct perf_output_handle handle;
+ int size = comm_event->event.header.size;
+ int ret = perf_output_begin(&handle, counter, size, 0, 0);
+
+ if (ret)
+ return;
+
+ comm_event->event.pid = perf_counter_pid(counter, comm_event->task);
+ comm_event->event.tid = perf_counter_tid(counter, comm_event->task);
+
+ perf_output_put(&handle, comm_event->event);
+ perf_output_copy(&handle, comm_event->comm,
+ comm_event->comm_size);
+ perf_output_end(&handle);
+}
+
+static int perf_counter_comm_match(struct perf_counter *counter)
+{
+ if (counter->attr.comm)
+ return 1;
+
+ return 0;
+}
+
+static void perf_counter_comm_ctx(struct perf_counter_context *ctx,
+ struct perf_comm_event *comm_event)
+{
+ struct perf_counter *counter;
+
+ if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(counter, &ctx->event_list, event_entry) {
+ if (perf_counter_comm_match(counter))
+ perf_counter_comm_output(counter, comm_event);
+ }
+ rcu_read_unlock();
+}
+
+static void perf_counter_comm_event(struct perf_comm_event *comm_event)
+{
+ struct perf_cpu_context *cpuctx;
+ struct perf_counter_context *ctx;
+ unsigned int size;
+ char *comm = comm_event->task->comm;
+
+ size = ALIGN(strlen(comm)+1, sizeof(u64));
+
+ comm_event->comm = comm;
+ comm_event->comm_size = size;
+
+ comm_event->event.header.size = sizeof(comm_event->event) + size;
+
+ cpuctx = &get_cpu_var(perf_cpu_context);
+ perf_counter_comm_ctx(&cpuctx->ctx, comm_event);
+ put_cpu_var(perf_cpu_context);
+
+ rcu_read_lock();
+ /*
+ * doesn't really matter which of the child contexts the
+ * events ends up in.
+ */
+ ctx = rcu_dereference(current->perf_counter_ctxp);
+ if (ctx)
+ perf_counter_comm_ctx(ctx, comm_event);
+ rcu_read_unlock();
+}
+
+void perf_counter_comm(struct task_struct *task)
+{
+ struct perf_comm_event comm_event;
+
+ if (!atomic_read(&nr_comm_counters))
+ return;
+
+ comm_event = (struct perf_comm_event){
+ .task = task,
+ .event = {
+ .header = { .type = PERF_EVENT_COMM, },
+ },
+ };
+
+ perf_counter_comm_event(&comm_event);
+}
+
+/*
+ * mmap tracking
+ */
+
+struct perf_mmap_event {
+ struct vm_area_struct *vma;
+
+ const char *file_name;
+ int file_size;
+
+ struct {
+ struct perf_event_header header;
+
+ u32 pid;
+ u32 tid;
+ u64 start;
+ u64 len;
+ u64 pgoff;
+ } event;
+};
+
+static void perf_counter_mmap_output(struct perf_counter *counter,
+ struct perf_mmap_event *mmap_event)
+{
+ struct perf_output_handle handle;
+ int size = mmap_event->event.header.size;
+ int ret = perf_output_begin(&handle, counter, size, 0, 0);
+
+ if (ret)
+ return;
+
+ mmap_event->event.pid = perf_counter_pid(counter, current);
+ mmap_event->event.tid = perf_counter_tid(counter, current);
+
+ perf_output_put(&handle, mmap_event->event);
+ perf_output_copy(&handle, mmap_event->file_name,
+ mmap_event->file_size);
+ perf_output_end(&handle);
+}
+
+static int perf_counter_mmap_match(struct perf_counter *counter,
+ struct perf_mmap_event *mmap_event)
+{
+ if (counter->attr.mmap)
+ return 1;
+
+ return 0;
+}
+
+static void perf_counter_mmap_ctx(struct perf_counter_context *ctx,
+ struct perf_mmap_event *mmap_event)
+{
+ struct perf_counter *counter;
+
+ if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(counter, &ctx->event_list, event_entry) {
+ if (perf_counter_mmap_match(counter, mmap_event))
+ perf_counter_mmap_output(counter, mmap_event);
+ }
+ rcu_read_unlock();
+}
+
+static void perf_counter_mmap_event(struct perf_mmap_event *mmap_event)
+{
+ struct perf_cpu_context *cpuctx;
+ struct perf_counter_context *ctx;
+ struct vm_area_struct *vma = mmap_event->vma;
+ struct file *file = vma->vm_file;
+ unsigned int size;
+ char tmp[16];
+ char *buf = NULL;
+ const char *name;
+
+ if (file) {
+ buf = kzalloc(PATH_MAX, GFP_KERNEL);
+ if (!buf) {
+ name = strncpy(tmp, "//enomem", sizeof(tmp));
+ goto got_name;
+ }
+ name = d_path(&file->f_path, buf, PATH_MAX);
+ if (IS_ERR(name)) {
+ name = strncpy(tmp, "//toolong", sizeof(tmp));
+ goto got_name;
+ }
+ } else {
+ name = arch_vma_name(mmap_event->vma);
+ if (name)
+ goto got_name;
+
+ if (!vma->vm_mm) {
+ name = strncpy(tmp, "[vdso]", sizeof(tmp));
+ goto got_name;
+ }
+
+ name = strncpy(tmp, "//anon", sizeof(tmp));
+ goto got_name;
+ }
+
+got_name:
+ size = ALIGN(strlen(name)+1, sizeof(u64));
+
+ mmap_event->file_name = name;
+ mmap_event->file_size = size;
+
+ mmap_event->event.header.size = sizeof(mmap_event->event) + size;
+
+ cpuctx = &get_cpu_var(perf_cpu_context);
+ perf_counter_mmap_ctx(&cpuctx->ctx, mmap_event);
+ put_cpu_var(perf_cpu_context);
+
+ rcu_read_lock();
+ /*
+ * doesn't really matter which of the child contexts the
+ * events ends up in.
+ */
+ ctx = rcu_dereference(current->perf_counter_ctxp);
+ if (ctx)
+ perf_counter_mmap_ctx(ctx, mmap_event);
+ rcu_read_unlock();
+
+ kfree(buf);
+}
+
+void __perf_counter_mmap(struct vm_area_struct *vma)
+{
+ struct perf_mmap_event mmap_event;
+
+ if (!atomic_read(&nr_mmap_counters))
+ return;
+
+ mmap_event = (struct perf_mmap_event){
+ .vma = vma,
+ .event = {
+ .header = { .type = PERF_EVENT_MMAP, },
+ .start = vma->vm_start,
+ .len = vma->vm_end - vma->vm_start,
+ .pgoff = vma->vm_pgoff,
+ },
+ };
+
+ perf_counter_mmap_event(&mmap_event);
+}
+
+/*
+ * Log sample_period changes so that analyzing tools can re-normalize the
+ * event flow.
+ */
+
+struct freq_event {
+ struct perf_event_header header;
+ u64 time;
+ u64 id;
+ u64 period;
+};
+
+static void perf_log_period(struct perf_counter *counter, u64 period)
+{
+ struct perf_output_handle handle;
+ struct freq_event event;
+ int ret;
+
+ if (counter->hw.sample_period == period)
+ return;
+
+ if (counter->attr.sample_type & PERF_SAMPLE_PERIOD)
+ return;
+
+ event = (struct freq_event) {
+ .header = {
+ .type = PERF_EVENT_PERIOD,
+ .misc = 0,
+ .size = sizeof(event),
+ },
+ .time = sched_clock(),
+ .id = counter->id,
+ .period = period,
+ };
+
+ ret = perf_output_begin(&handle, counter, sizeof(event), 1, 0);
+ if (ret)
+ return;
+
+ perf_output_put(&handle, event);
+ perf_output_end(&handle);
+}
+
+/*
+ * IRQ throttle logging
+ */
+
+static void perf_log_throttle(struct perf_counter *counter, int enable)
+{
+ struct perf_output_handle handle;
+ int ret;
+
+ struct {
+ struct perf_event_header header;
+ u64 time;
+ u64 id;
+ } throttle_event = {
+ .header = {
+ .type = PERF_EVENT_THROTTLE + 1,
+ .misc = 0,
+ .size = sizeof(throttle_event),
+ },
+ .time = sched_clock(),
+ .id = counter->id,
+ };
+
+ ret = perf_output_begin(&handle, counter, sizeof(throttle_event), 1, 0);
+ if (ret)
+ return;
+
+ perf_output_put(&handle, throttle_event);
+ perf_output_end(&handle);
+}
+
+/*
+ * Generic counter overflow handling.
+ */
+
+int perf_counter_overflow(struct perf_counter *counter, int nmi,
+ struct perf_sample_data *data)
+{
+ int events = atomic_read(&counter->event_limit);
+ int throttle = counter->pmu->unthrottle != NULL;
+ struct hw_perf_counter *hwc = &counter->hw;
+ int ret = 0;
+
+ if (!throttle) {
+ hwc->interrupts++;
+ } else {
+ if (hwc->interrupts != MAX_INTERRUPTS) {
+ hwc->interrupts++;
+ if (HZ * hwc->interrupts >
+ (u64)sysctl_perf_counter_sample_rate) {
+ hwc->interrupts = MAX_INTERRUPTS;
+ perf_log_throttle(counter, 0);
+ ret = 1;
+ }
+ } else {
+ /*
+ * Keep re-disabling counters even though on the previous
+ * pass we disabled it - just in case we raced with a
+ * sched-in and the counter got enabled again:
+ */
+ ret = 1;
+ }
+ }
+
+ if (counter->attr.freq) {
+ u64 now = sched_clock();
+ s64 delta = now - hwc->freq_stamp;
+
+ hwc->freq_stamp = now;
+
+ if (delta > 0 && delta < TICK_NSEC)
+ perf_adjust_period(counter, NSEC_PER_SEC / (int)delta);
+ }
+
+ /*
+ * XXX event_limit might not quite work as expected on inherited
+ * counters
+ */
+
+ counter->pending_kill = POLL_IN;
+ if (events && atomic_dec_and_test(&counter->event_limit)) {
+ ret = 1;
+ counter->pending_kill = POLL_HUP;
+ if (nmi) {
+ counter->pending_disable = 1;
+ perf_pending_queue(&counter->pending,
+ perf_pending_counter);
+ } else
+ perf_counter_disable(counter);
+ }
+
+ perf_counter_output(counter, nmi, data);
+ return ret;
+}
+
+/*
+ * Generic software counter infrastructure
+ */
+
+static void perf_swcounter_update(struct perf_counter *counter)
+{
+ struct hw_perf_counter *hwc = &counter->hw;
+ u64 prev, now;
+ s64 delta;
+
+again:
+ prev = atomic64_read(&hwc->prev_count);
+ now = atomic64_read(&hwc->count);
+ if (atomic64_cmpxchg(&hwc->prev_count, prev, now) != prev)
+ goto again;
+
+ delta = now - prev;
+
+ atomic64_add(delta, &counter->count);
+ atomic64_sub(delta, &hwc->period_left);
+}
+
+static void perf_swcounter_set_period(struct perf_counter *counter)
+{
+ struct hw_perf_counter *hwc = &counter->hw;
+ s64 left = atomic64_read(&hwc->period_left);
+ s64 period = hwc->sample_period;
+
+ if (unlikely(left <= -period)) {
+ left = period;
+ atomic64_set(&hwc->period_left, left);
+ hwc->last_period = period;
+ }
+
+ if (unlikely(left <= 0)) {
+ left += period;
+ atomic64_add(period, &hwc->period_left);
+ hwc->last_period = period;
+ }
+
+ atomic64_set(&hwc->prev_count, -left);
+ atomic64_set(&hwc->count, -left);
+}
+
+static enum hrtimer_restart perf_swcounter_hrtimer(struct hrtimer *hrtimer)
+{
+ enum hrtimer_restart ret = HRTIMER_RESTART;
+ struct perf_sample_data data;
+ struct perf_counter *counter;
+ u64 period;
+
+ counter = container_of(hrtimer, struct perf_counter, hw.hrtimer);
+ counter->pmu->read(counter);
+
+ data.addr = 0;
+ data.regs = get_irq_regs();
+ /*
+ * In case we exclude kernel IPs or are somehow not in interrupt
+ * context, provide the next best thing, the user IP.
+ */
+ if ((counter->attr.exclude_kernel || !data.regs) &&
+ !counter->attr.exclude_user)
+ data.regs = task_pt_regs(current);
+
+ if (data.regs) {
+ if (perf_counter_overflow(counter, 0, &data))
+ ret = HRTIMER_NORESTART;
+ }
+
+ period = max_t(u64, 10000, counter->hw.sample_period);
+ hrtimer_forward_now(hrtimer, ns_to_ktime(period));
+
+ return ret;
+}
+
+static void perf_swcounter_overflow(struct perf_counter *counter,
+ int nmi, struct pt_regs *regs, u64 addr)
+{
+ struct perf_sample_data data = {
+ .regs = regs,
+ .addr = addr,
+ .period = counter->hw.last_period,
+ };
+
+ perf_swcounter_update(counter);
+ perf_swcounter_set_period(counter);
+ if (perf_counter_overflow(counter, nmi, &data))
+ /* soft-disable the counter */
+ ;
+
+}
+
+static int perf_swcounter_is_counting(struct perf_counter *counter)
+{
+ struct perf_counter_context *ctx;
+ unsigned long flags;
+ int count;
+
+ if (counter->state == PERF_COUNTER_STATE_ACTIVE)
+ return 1;
+
+ if (counter->state != PERF_COUNTER_STATE_INACTIVE)
+ return 0;
+
+ /*
+ * If the counter is inactive, it could be just because
+ * its task is scheduled out, or because it's in a group
+ * which could not go on the PMU. We want to count in
+ * the first case but not the second. If the context is
+ * currently active then an inactive software counter must
+ * be the second case. If it's not currently active then
+ * we need to know whether the counter was active when the
+ * context was last active, which we can determine by
+ * comparing counter->tstamp_stopped with ctx->time.
+ *
+ * We are within an RCU read-side critical section,
+ * which protects the existence of *ctx.
+ */
+ ctx = counter->ctx;
+ spin_lock_irqsave(&ctx->lock, flags);
+ count = 1;
+ /* Re-check state now we have the lock */
+ if (counter->state < PERF_COUNTER_STATE_INACTIVE ||
+ counter->ctx->is_active ||
+ counter->tstamp_stopped < ctx->time)
+ count = 0;
+ spin_unlock_irqrestore(&ctx->lock, flags);
+ return count;
+}
+
+static int perf_swcounter_match(struct perf_counter *counter,
+ enum perf_type_id type,
+ u32 event, struct pt_regs *regs)
+{
+ if (!perf_swcounter_is_counting(counter))
+ return 0;
+
+ if (counter->attr.type != type)
+ return 0;
+ if (counter->attr.config != event)
+ return 0;
+
+ if (regs) {
+ if (counter->attr.exclude_user && user_mode(regs))
+ return 0;
+
+ if (counter->attr.exclude_kernel && !user_mode(regs))
+ return 0;
+ }
+
+ return 1;
+}
+
+static void perf_swcounter_add(struct perf_counter *counter, u64 nr,
+ int nmi, struct pt_regs *regs, u64 addr)
+{
+ int neg = atomic64_add_negative(nr, &counter->hw.count);
+
+ if (counter->hw.sample_period && !neg && regs)
+ perf_swcounter_overflow(counter, nmi, regs, addr);
+}
+
+static void perf_swcounter_ctx_event(struct perf_counter_context *ctx,
+ enum perf_type_id type, u32 event,
+ u64 nr, int nmi, struct pt_regs *regs,
+ u64 addr)
+{
+ struct perf_counter *counter;
+
+ if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(counter, &ctx->event_list, event_entry) {
+ if (perf_swcounter_match(counter, type, event, regs))
+ perf_swcounter_add(counter, nr, nmi, regs, addr);
+ }
+ rcu_read_unlock();
+}
+
+static int *perf_swcounter_recursion_context(struct perf_cpu_context *cpuctx)
+{
+ if (in_nmi())
+ return &cpuctx->recursion[3];
+
+ if (in_irq())
+ return &cpuctx->recursion[2];
+
+ if (in_softirq())
+ return &cpuctx->recursion[1];
+
+ return &cpuctx->recursion[0];
+}
+
+static void __perf_swcounter_event(enum perf_type_id type, u32 event,
+ u64 nr, int nmi, struct pt_regs *regs,
+ u64 addr)
+{
+ struct perf_cpu_context *cpuctx = &get_cpu_var(perf_cpu_context);
+ int *recursion = perf_swcounter_recursion_context(cpuctx);
+ struct perf_counter_context *ctx;
+
+ if (*recursion)
+ goto out;
+
+ (*recursion)++;
+ barrier();
+
+ perf_swcounter_ctx_event(&cpuctx->ctx, type, event,
+ nr, nmi, regs, addr);
+ rcu_read_lock();
+ /*
+ * doesn't really matter which of the child contexts the
+ * events ends up in.
+ */
+ ctx = rcu_dereference(current->perf_counter_ctxp);
+ if (ctx)
+ perf_swcounter_ctx_event(ctx, type, event, nr, nmi, regs, addr);
+ rcu_read_unlock();
+
+ barrier();
+ (*recursion)--;
+
+out:
+ put_cpu_var(perf_cpu_context);
+}
+
+void
+perf_swcounter_event(u32 event, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
+{
+ __perf_swcounter_event(PERF_TYPE_SOFTWARE, event, nr, nmi, regs, addr);
+}
+
+static void perf_swcounter_read(struct perf_counter *counter)
+{
+ perf_swcounter_update(counter);
+}
+
+static int perf_swcounter_enable(struct perf_counter *counter)
+{
+ perf_swcounter_set_period(counter);
+ return 0;
+}
+
+static void perf_swcounter_disable(struct perf_counter *counter)
+{
+ perf_swcounter_update(counter);
+}
+
+static const struct pmu perf_ops_generic = {
+ .enable = perf_swcounter_enable,
+ .disable = perf_swcounter_disable,
+ .read = perf_swcounter_read,
+};
+
+/*
+ * Software counter: cpu wall time clock
+ */
+
+static void cpu_clock_perf_counter_update(struct perf_counter *counter)
+{
+ int cpu = raw_smp_processor_id();
+ s64 prev;
+ u64 now;
+
+ now = cpu_clock(cpu);
+ prev = atomic64_read(&counter->hw.prev_count);
+ atomic64_set(&counter->hw.prev_count, now);
+ atomic64_add(now - prev, &counter->count);
+}
+
+static int cpu_clock_perf_counter_enable(struct perf_counter *counter)
+{
+ struct hw_perf_counter *hwc = &counter->hw;
+ int cpu = raw_smp_processor_id();
+
+ atomic64_set(&hwc->prev_count, cpu_clock(cpu));
+ hrtimer_init(&hwc->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ hwc->hrtimer.function = perf_swcounter_hrtimer;
+ if (hwc->sample_period) {
+ u64 period = max_t(u64, 10000, hwc->sample_period);
+ __hrtimer_start_range_ns(&hwc->hrtimer,
+ ns_to_ktime(period), 0,
+ HRTIMER_MODE_REL, 0);
+ }
+
+ return 0;
+}
+
+static void cpu_clock_perf_counter_disable(struct perf_counter *counter)
+{
+ if (counter->hw.sample_period)
+ hrtimer_cancel(&counter->hw.hrtimer);
+ cpu_clock_perf_counter_update(counter);
+}
+
+static void cpu_clock_perf_counter_read(struct perf_counter *counter)
+{
+ cpu_clock_perf_counter_update(counter);
+}
+
+static const struct pmu perf_ops_cpu_clock = {
+ .enable = cpu_clock_perf_counter_enable,
+ .disable = cpu_clock_perf_counter_disable,
+ .read = cpu_clock_perf_counter_read,
+};
+
+/*
+ * Software counter: task time clock
+ */
+
+static void task_clock_perf_counter_update(struct perf_counter *counter, u64 now)
+{
+ u64 prev;
+ s64 delta;
+
+ prev = atomic64_xchg(&counter->hw.prev_count, now);
+ delta = now - prev;
+ atomic64_add(delta, &counter->count);
+}
+
+static int task_clock_perf_counter_enable(struct perf_counter *counter)
+{
+ struct hw_perf_counter *hwc = &counter->hw;
+ u64 now;
+
+ now = counter->ctx->time;
+
+ atomic64_set(&hwc->prev_count, now);
+ hrtimer_init(&hwc->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ hwc->hrtimer.function = perf_swcounter_hrtimer;
+ if (hwc->sample_period) {
+ u64 period = max_t(u64, 10000, hwc->sample_period);
+ __hrtimer_start_range_ns(&hwc->hrtimer,
+ ns_to_ktime(period), 0,
+ HRTIMER_MODE_REL, 0);
+ }
+
+ return 0;
+}
+
+static void task_clock_perf_counter_disable(struct perf_counter *counter)
+{
+ if (counter->hw.sample_period)
+ hrtimer_cancel(&counter->hw.hrtimer);
+ task_clock_perf_counter_update(counter, counter->ctx->time);
+
+}
+
+static void task_clock_perf_counter_read(struct perf_counter *counter)
+{
+ u64 time;
+
+ if (!in_nmi()) {
+ update_context_time(counter->ctx);
+ time = counter->ctx->time;
+ } else {
+ u64 now = perf_clock();
+ u64 delta = now - counter->ctx->timestamp;
+ time = counter->ctx->time + delta;
+ }
+
+ task_clock_perf_counter_update(counter, time);
+}
+
+static const struct pmu perf_ops_task_clock = {
+ .enable = task_clock_perf_counter_enable,
+ .disable = task_clock_perf_counter_disable,
+ .read = task_clock_perf_counter_read,
+};
+
+/*
+ * Software counter: cpu migrations
+ */
+void perf_counter_task_migration(struct task_struct *task, int cpu)
+{
+ struct perf_cpu_context *cpuctx = &per_cpu(perf_cpu_context, cpu);
+ struct perf_counter_context *ctx;
+
+ perf_swcounter_ctx_event(&cpuctx->ctx, PERF_TYPE_SOFTWARE,
+ PERF_COUNT_SW_CPU_MIGRATIONS,
+ 1, 1, NULL, 0);
+
+ ctx = perf_pin_task_context(task);
+ if (ctx) {
+ perf_swcounter_ctx_event(ctx, PERF_TYPE_SOFTWARE,
+ PERF_COUNT_SW_CPU_MIGRATIONS,
+ 1, 1, NULL, 0);
+ perf_unpin_context(ctx);
+ }
+}
+
+#ifdef CONFIG_EVENT_PROFILE
+void perf_tpcounter_event(int event_id)
+{
+ struct pt_regs *regs = get_irq_regs();
+
+ if (!regs)
+ regs = task_pt_regs(current);
+
+ __perf_swcounter_event(PERF_TYPE_TRACEPOINT, event_id, 1, 1, regs, 0);
+}
+EXPORT_SYMBOL_GPL(perf_tpcounter_event);
+
+extern int ftrace_profile_enable(int);
+extern void ftrace_profile_disable(int);
+
+static void tp_perf_counter_destroy(struct perf_counter *counter)
+{
+ ftrace_profile_disable(perf_event_id(&counter->attr));
+}
+
+static const struct pmu *tp_perf_counter_init(struct perf_counter *counter)
+{
+ int event_id = perf_event_id(&counter->attr);
+ int ret;
+
+ ret = ftrace_profile_enable(event_id);
+ if (ret)
+ return NULL;
+
+ counter->destroy = tp_perf_counter_destroy;
+
+ return &perf_ops_generic;
+}
+#else
+static const struct pmu *tp_perf_counter_init(struct perf_counter *counter)
+{
+ return NULL;
+}
+#endif
+
+static const struct pmu *sw_perf_counter_init(struct perf_counter *counter)
+{
+ const struct pmu *pmu = NULL;
+
+ /*
+ * Software counters (currently) can't in general distinguish
+ * between user, kernel and hypervisor events.
+ * However, context switches and cpu migrations are considered
+ * to be kernel events, and page faults are never hypervisor
+ * events.
+ */
+ switch (counter->attr.config) {
+ case PERF_COUNT_SW_CPU_CLOCK:
+ pmu = &perf_ops_cpu_clock;
+
+ break;
+ case PERF_COUNT_SW_TASK_CLOCK:
+ /*
+ * If the user instantiates this as a per-cpu counter,
+ * use the cpu_clock counter instead.
+ */
+ if (counter->ctx->task)
+ pmu = &perf_ops_task_clock;
+ else
+ pmu = &perf_ops_cpu_clock;
+
+ break;
+ case PERF_COUNT_SW_PAGE_FAULTS:
+ case PERF_COUNT_SW_PAGE_FAULTS_MIN:
+ case PERF_COUNT_SW_PAGE_FAULTS_MAJ:
+ case PERF_COUNT_SW_CONTEXT_SWITCHES:
+ case PERF_COUNT_SW_CPU_MIGRATIONS:
+ pmu = &perf_ops_generic;
+ break;
+ }
+
+ return pmu;
+}
+
+/*
+ * Allocate and initialize a counter structure
+ */
+static struct perf_counter *
+perf_counter_alloc(struct perf_counter_attr *attr,
+ int cpu,
+ struct perf_counter_context *ctx,
+ struct perf_counter *group_leader,
+ gfp_t gfpflags)
+{
+ const struct pmu *pmu;
+ struct perf_counter *counter;
+ struct hw_perf_counter *hwc;
+ long err;
+
+ counter = kzalloc(sizeof(*counter), gfpflags);
+ if (!counter)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * Single counters are their own group leaders, with an
+ * empty sibling list:
+ */
+ if (!group_leader)
+ group_leader = counter;
+
+ mutex_init(&counter->child_mutex);
+ INIT_LIST_HEAD(&counter->child_list);
+
+ INIT_LIST_HEAD(&counter->list_entry);
+ INIT_LIST_HEAD(&counter->event_entry);
+ INIT_LIST_HEAD(&counter->sibling_list);
+ init_waitqueue_head(&counter->waitq);
+
+ mutex_init(&counter->mmap_mutex);
+
+ counter->cpu = cpu;
+ counter->attr = *attr;
+ counter->group_leader = group_leader;
+ counter->pmu = NULL;
+ counter->ctx = ctx;
+ counter->oncpu = -1;
+
+ counter->ns = get_pid_ns(current->nsproxy->pid_ns);
+ counter->id = atomic64_inc_return(&perf_counter_id);
+
+ counter->state = PERF_COUNTER_STATE_INACTIVE;
+
+ if (attr->disabled)
+ counter->state = PERF_COUNTER_STATE_OFF;
+
+ pmu = NULL;
+
+ hwc = &counter->hw;
+ hwc->sample_period = attr->sample_period;
+ if (attr->freq && attr->sample_freq)
+ hwc->sample_period = 1;
+
+ atomic64_set(&hwc->period_left, hwc->sample_period);
+
+ /*
+ * we currently do not support PERF_SAMPLE_GROUP on inherited counters
+ */
+ if (attr->inherit && (attr->sample_type & PERF_SAMPLE_GROUP))
+ goto done;
+
+ if (attr->type == PERF_TYPE_RAW) {
+ pmu = hw_perf_counter_init(counter);
+ goto done;
+ }
+
+ switch (attr->type) {
+ case PERF_TYPE_HARDWARE:
+ case PERF_TYPE_HW_CACHE:
+ pmu = hw_perf_counter_init(counter);
+ break;
+
+ case PERF_TYPE_SOFTWARE:
+ pmu = sw_perf_counter_init(counter);
+ break;
+
+ case PERF_TYPE_TRACEPOINT:
+ pmu = tp_perf_counter_init(counter);
+ break;
+ }
+done:
+ err = 0;
+ if (!pmu)
+ err = -EINVAL;
+ else if (IS_ERR(pmu))
+ err = PTR_ERR(pmu);
+
+ if (err) {
+ if (counter->ns)
+ put_pid_ns(counter->ns);
+ kfree(counter);
+ return ERR_PTR(err);
+ }
+
+ counter->pmu = pmu;
+
+ atomic_inc(&nr_counters);
+ if (counter->attr.mmap)
+ atomic_inc(&nr_mmap_counters);
+ if (counter->attr.comm)
+ atomic_inc(&nr_comm_counters);
+
+ return counter;
+}
+
+/**
+ * sys_perf_counter_open - open a performance counter, associate it to a task/cpu
+ *
+ * @attr_uptr: event type attributes for monitoring/sampling
+ * @pid: target pid
+ * @cpu: target cpu
+ * @group_fd: group leader counter fd
+ */
+SYSCALL_DEFINE5(perf_counter_open,
+ const struct perf_counter_attr __user *, attr_uptr,
+ pid_t, pid, int, cpu, int, group_fd, unsigned long, flags)
+{
+ struct perf_counter *counter, *group_leader;
+ struct perf_counter_attr attr;
+ struct perf_counter_context *ctx;
+ struct file *counter_file = NULL;
+ struct file *group_file = NULL;
+ int fput_needed = 0;
+ int fput_needed2 = 0;
+ int ret;
+
+ /* for future expandability... */
+ if (flags)
+ return -EINVAL;
+
+ if (copy_from_user(&attr, attr_uptr, sizeof(attr)) != 0)
+ return -EFAULT;
+
+ if (!attr.exclude_kernel) {
+ if (perf_paranoid_kernel() && !capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ }
+
+ if (attr.freq) {
+ if (attr.sample_freq > sysctl_perf_counter_sample_rate)
+ return -EINVAL;
+ }
+
+ /*
+ * Get the target context (task or percpu):
+ */
+ ctx = find_get_context(pid, cpu);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ /*
+ * Look up the group leader (we will attach this counter to it):
+ */
+ group_leader = NULL;
+ if (group_fd != -1) {
+ ret = -EINVAL;
+ group_file = fget_light(group_fd, &fput_needed);
+ if (!group_file)
+ goto err_put_context;
+ if (group_file->f_op != &perf_fops)
+ goto err_put_context;
+
+ group_leader = group_file->private_data;
+ /*
+ * Do not allow a recursive hierarchy (this new sibling
+ * becoming part of another group-sibling):
+ */
+ if (group_leader->group_leader != group_leader)
+ goto err_put_context;
+ /*
+ * Do not allow to attach to a group in a different
+ * task or CPU context:
+ */
+ if (group_leader->ctx != ctx)
+ goto err_put_context;
+ /*
+ * Only a group leader can be exclusive or pinned
+ */
+ if (attr.exclusive || attr.pinned)
+ goto err_put_context;
+ }
+
+ counter = perf_counter_alloc(&attr, cpu, ctx, group_leader,
+ GFP_KERNEL);
+ ret = PTR_ERR(counter);
+ if (IS_ERR(counter))
+ goto err_put_context;
+
+ ret = anon_inode_getfd("[perf_counter]", &perf_fops, counter, 0);
+ if (ret < 0)
+ goto err_free_put_context;
+
+ counter_file = fget_light(ret, &fput_needed2);
+ if (!counter_file)
+ goto err_free_put_context;
+
+ counter->filp = counter_file;
+ WARN_ON_ONCE(ctx->parent_ctx);
+ mutex_lock(&ctx->mutex);
+ perf_install_in_context(ctx, counter, cpu);
+ ++ctx->generation;
+ mutex_unlock(&ctx->mutex);
+
+ counter->owner = current;
+ get_task_struct(current);
+ mutex_lock(¤t->perf_counter_mutex);
+ list_add_tail(&counter->owner_entry, ¤t->perf_counter_list);
+ mutex_unlock(¤t->perf_counter_mutex);
+
+ fput_light(counter_file, fput_needed2);
+
+out_fput:
+ fput_light(group_file, fput_needed);
+
+ return ret;
+
+err_free_put_context:
+ kfree(counter);
+
+err_put_context:
+ put_ctx(ctx);
+
+ goto out_fput;
+}
+
+/*
+ * inherit a counter from parent task to child task:
+ */
+static struct perf_counter *
+inherit_counter(struct perf_counter *parent_counter,
+ struct task_struct *parent,
+ struct perf_counter_context *parent_ctx,
+ struct task_struct *child,
+ struct perf_counter *group_leader,
+ struct perf_counter_context *child_ctx)
+{
+ struct perf_counter *child_counter;
+
+ /*
+ * Instead of creating recursive hierarchies of counters,
+ * we link inherited counters back to the original parent,
+ * which has a filp for sure, which we use as the reference
+ * count:
+ */
+ if (parent_counter->parent)
+ parent_counter = parent_counter->parent;
+
+ child_counter = perf_counter_alloc(&parent_counter->attr,
+ parent_counter->cpu, child_ctx,
+ group_leader, GFP_KERNEL);
+ if (IS_ERR(child_counter))
+ return child_counter;
+ get_ctx(child_ctx);
+
+ /*
+ * Make the child state follow the state of the parent counter,
+ * not its attr.disabled bit. We hold the parent's mutex,
+ * so we won't race with perf_counter_{en, dis}able_family.
+ */
+ if (parent_counter->state >= PERF_COUNTER_STATE_INACTIVE)
+ child_counter->state = PERF_COUNTER_STATE_INACTIVE;
+ else
+ child_counter->state = PERF_COUNTER_STATE_OFF;
+
+ if (parent_counter->attr.freq)
+ child_counter->hw.sample_period = parent_counter->hw.sample_period;
+
+ /*
+ * Link it up in the child's context:
+ */
+ add_counter_to_ctx(child_counter, child_ctx);
+
+ child_counter->parent = parent_counter;
+ /*
+ * inherit into child's child as well:
+ */
+ child_counter->attr.inherit = 1;
+
+ /*
+ * Get a reference to the parent filp - we will fput it
+ * when the child counter exits. This is safe to do because
+ * we are in the parent and we know that the filp still
+ * exists and has a nonzero count:
+ */
+ atomic_long_inc(&parent_counter->filp->f_count);
+
+ /*
+ * Link this into the parent counter's child list
+ */
+ WARN_ON_ONCE(parent_counter->ctx->parent_ctx);
+ mutex_lock(&parent_counter->child_mutex);
+ list_add_tail(&child_counter->child_list, &parent_counter->child_list);
+ mutex_unlock(&parent_counter->child_mutex);
+
+ return child_counter;
+}
+
+static int inherit_group(struct perf_counter *parent_counter,
+ struct task_struct *parent,
+ struct perf_counter_context *parent_ctx,
+ struct task_struct *child,
+ struct perf_counter_context *child_ctx)
+{
+ struct perf_counter *leader;
+ struct perf_counter *sub;
+ struct perf_counter *child_ctr;
+
+ leader = inherit_counter(parent_counter, parent, parent_ctx,
+ child, NULL, child_ctx);
+ if (IS_ERR(leader))
+ return PTR_ERR(leader);
+ list_for_each_entry(sub, &parent_counter->sibling_list, list_entry) {
+ child_ctr = inherit_counter(sub, parent, parent_ctx,
+ child, leader, child_ctx);
+ if (IS_ERR(child_ctr))
+ return PTR_ERR(child_ctr);
+ }
+ return 0;
+}
+
+static void sync_child_counter(struct perf_counter *child_counter,
+ struct perf_counter *parent_counter)
+{
+ u64 child_val;
+
+ child_val = atomic64_read(&child_counter->count);
+
+ /*
+ * Add back the child's count to the parent's count:
+ */
+ atomic64_add(child_val, &parent_counter->count);
+ atomic64_add(child_counter->total_time_enabled,
+ &parent_counter->child_total_time_enabled);
+ atomic64_add(child_counter->total_time_running,
+ &parent_counter->child_total_time_running);
+
+ /*
+ * Remove this counter from the parent's list
+ */
+ WARN_ON_ONCE(parent_counter->ctx->parent_ctx);
+ mutex_lock(&parent_counter->child_mutex);
+ list_del_init(&child_counter->child_list);
+ mutex_unlock(&parent_counter->child_mutex);
+
+ /*
+ * Release the parent counter, if this was the last
+ * reference to it.
+ */
+ fput(parent_counter->filp);
+}
+
+static void
+__perf_counter_exit_task(struct perf_counter *child_counter,
+ struct perf_counter_context *child_ctx)
+{
+ struct perf_counter *parent_counter;
+
+ update_counter_times(child_counter);
+ perf_counter_remove_from_context(child_counter);
+
+ parent_counter = child_counter->parent;
+ /*
+ * It can happen that parent exits first, and has counters
+ * that are still around due to the child reference. These
+ * counters need to be zapped - but otherwise linger.
+ */
+ if (parent_counter) {
+ sync_child_counter(child_counter, parent_counter);
+ free_counter(child_counter);
+ }
+}
+
+/*
+ * When a child task exits, feed back counter values to parent counters.
+ */
+void perf_counter_exit_task(struct task_struct *child)
+{
+ struct perf_counter *child_counter, *tmp;
+ struct perf_counter_context *child_ctx;
+ unsigned long flags;
+
+ if (likely(!child->perf_counter_ctxp))
+ return;
+
+ local_irq_save(flags);
+ /*
+ * We can't reschedule here because interrupts are disabled,
+ * and either child is current or it is a task that can't be
+ * scheduled, so we are now safe from rescheduling changing
+ * our context.
+ */
+ child_ctx = child->perf_counter_ctxp;
+ __perf_counter_task_sched_out(child_ctx);
+
+ /*
+ * Take the context lock here so that if find_get_context is
+ * reading child->perf_counter_ctxp, we wait until it has
+ * incremented the context's refcount before we do put_ctx below.
+ */
+ spin_lock(&child_ctx->lock);
+ child->perf_counter_ctxp = NULL;
+ if (child_ctx->parent_ctx) {
+ /*
+ * This context is a clone; unclone it so it can't get
+ * swapped to another process while we're removing all
+ * the counters from it.
+ */
+ put_ctx(child_ctx->parent_ctx);
+ child_ctx->parent_ctx = NULL;
+ }
+ spin_unlock(&child_ctx->lock);
+ local_irq_restore(flags);
+
+ /*
+ * We can recurse on the same lock type through:
+ *
+ * __perf_counter_exit_task()
+ * sync_child_counter()
+ * fput(parent_counter->filp)
+ * perf_release()
+ * mutex_lock(&ctx->mutex)
+ *
+ * But since its the parent context it won't be the same instance.
+ */
+ mutex_lock_nested(&child_ctx->mutex, SINGLE_DEPTH_NESTING);
+
+again:
+ list_for_each_entry_safe(child_counter, tmp, &child_ctx->counter_list,
+ list_entry)
+ __perf_counter_exit_task(child_counter, child_ctx);
+
+ /*
+ * If the last counter was a group counter, it will have appended all
+ * its siblings to the list, but we obtained 'tmp' before that which
+ * will still point to the list head terminating the iteration.
+ */
+ if (!list_empty(&child_ctx->counter_list))
+ goto again;
+
+ mutex_unlock(&child_ctx->mutex);
+
+ put_ctx(child_ctx);
+}
+
+/*
+ * free an unexposed, unused context as created by inheritance by
+ * init_task below, used by fork() in case of fail.
+ */
+void perf_counter_free_task(struct task_struct *task)
+{
+ struct perf_counter_context *ctx = task->perf_counter_ctxp;
+ struct perf_counter *counter, *tmp;
+
+ if (!ctx)
+ return;
+
+ mutex_lock(&ctx->mutex);
+again:
+ list_for_each_entry_safe(counter, tmp, &ctx->counter_list, list_entry) {
+ struct perf_counter *parent = counter->parent;
+
+ if (WARN_ON_ONCE(!parent))
+ continue;
+
+ mutex_lock(&parent->child_mutex);
+ list_del_init(&counter->child_list);
+ mutex_unlock(&parent->child_mutex);
+
+ fput(parent->filp);
+
+ list_del_counter(counter, ctx);
+ free_counter(counter);
+ }
+
+ if (!list_empty(&ctx->counter_list))
+ goto again;
+
+ mutex_unlock(&ctx->mutex);
+
+ put_ctx(ctx);
+}
+
+/*
+ * Initialize the perf_counter context in task_struct
+ */
+int perf_counter_init_task(struct task_struct *child)
+{
+ struct perf_counter_context *child_ctx, *parent_ctx;
+ struct perf_counter_context *cloned_ctx;
+ struct perf_counter *counter;
+ struct task_struct *parent = current;
+ int inherited_all = 1;
+ int ret = 0;
+
+ child->perf_counter_ctxp = NULL;
+
+ mutex_init(&child->perf_counter_mutex);
+ INIT_LIST_HEAD(&child->perf_counter_list);
+
+ if (likely(!parent->perf_counter_ctxp))
+ return 0;
+
+ /*
+ * This is executed from the parent task context, so inherit
+ * counters that have been marked for cloning.
+ * First allocate and initialize a context for the child.
+ */
+
+ child_ctx = kmalloc(sizeof(struct perf_counter_context), GFP_KERNEL);
+ if (!child_ctx)
+ return -ENOMEM;
+
+ __perf_counter_init_context(child_ctx, child);
+ child->perf_counter_ctxp = child_ctx;
+ get_task_struct(child);
+
+ /*
+ * If the parent's context is a clone, pin it so it won't get
+ * swapped under us.
+ */
+ parent_ctx = perf_pin_task_context(parent);
+
+ /*
+ * No need to check if parent_ctx != NULL here; since we saw
+ * it non-NULL earlier, the only reason for it to become NULL
+ * is if we exit, and since we're currently in the middle of
+ * a fork we can't be exiting at the same time.
+ */
+
+ /*
+ * Lock the parent list. No need to lock the child - not PID
+ * hashed yet and not running, so nobody can access it.
+ */
+ mutex_lock(&parent_ctx->mutex);
+
+ /*
+ * We dont have to disable NMIs - we are only looking at
+ * the list, not manipulating it:
+ */
+ list_for_each_entry_rcu(counter, &parent_ctx->event_list, event_entry) {
+ if (counter != counter->group_leader)
+ continue;
+
+ if (!counter->attr.inherit) {
+ inherited_all = 0;
+ continue;
+ }
+
+ ret = inherit_group(counter, parent, parent_ctx,
+ child, child_ctx);
+ if (ret) {
+ inherited_all = 0;
+ break;
+ }
+ }
+
+ if (inherited_all) {
+ /*
+ * Mark the child context as a clone of the parent
+ * context, or of whatever the parent is a clone of.
+ * Note that if the parent is a clone, it could get
+ * uncloned at any point, but that doesn't matter
+ * because the list of counters and the generation
+ * count can't have changed since we took the mutex.
+ */
+ cloned_ctx = rcu_dereference(parent_ctx->parent_ctx);
+ if (cloned_ctx) {
+ child_ctx->parent_ctx = cloned_ctx;
+ child_ctx->parent_gen = parent_ctx->parent_gen;
+ } else {
+ child_ctx->parent_ctx = parent_ctx;
+ child_ctx->parent_gen = parent_ctx->generation;
+ }
+ get_ctx(child_ctx->parent_ctx);
+ }
+
+ mutex_unlock(&parent_ctx->mutex);
+
+ perf_unpin_context(parent_ctx);
+
+ return ret;
+}
+
+static void __cpuinit perf_counter_init_cpu(int cpu)
+{
+ struct perf_cpu_context *cpuctx;
+
+ cpuctx = &per_cpu(perf_cpu_context, cpu);
+ __perf_counter_init_context(&cpuctx->ctx, NULL);
+
+ spin_lock(&perf_resource_lock);
+ cpuctx->max_pertask = perf_max_counters - perf_reserved_percpu;
+ spin_unlock(&perf_resource_lock);
+
+ hw_perf_counter_setup(cpu);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void __perf_counter_exit_cpu(void *info)
+{
+ struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
+ struct perf_counter_context *ctx = &cpuctx->ctx;
+ struct perf_counter *counter, *tmp;
+
+ list_for_each_entry_safe(counter, tmp, &ctx->counter_list, list_entry)
+ __perf_counter_remove_from_context(counter);
+}
+static void perf_counter_exit_cpu(int cpu)
+{
+ struct perf_cpu_context *cpuctx = &per_cpu(perf_cpu_context, cpu);
+ struct perf_counter_context *ctx = &cpuctx->ctx;
+
+ mutex_lock(&ctx->mutex);
+ smp_call_function_single(cpu, __perf_counter_exit_cpu, NULL, 1);
+ mutex_unlock(&ctx->mutex);
+}
+#else
+static inline void perf_counter_exit_cpu(int cpu) { }
+#endif
+
+static int __cpuinit
+perf_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (long)hcpu;
+
+ switch (action) {
+
+ case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
+ perf_counter_init_cpu(cpu);
+ break;
+
+ case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
+ perf_counter_exit_cpu(cpu);
+ break;
+
+ default:
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+/*
+ * This has to have a higher priority than migration_notifier in sched.c.
+ */
+static struct notifier_block __cpuinitdata perf_cpu_nb = {
+ .notifier_call = perf_cpu_notify,
+ .priority = 20,
+};
+
+void __init perf_counter_init(void)
+{
+ perf_cpu_notify(&perf_cpu_nb, (unsigned long)CPU_UP_PREPARE,
+ (void *)(long)smp_processor_id());
+ register_cpu_notifier(&perf_cpu_nb);
+}
+
+static ssize_t perf_show_reserve_percpu(struct sysdev_class *class, char *buf)
+{
+ return sprintf(buf, "%d\n", perf_reserved_percpu);
+}
+
+static ssize_t
+perf_set_reserve_percpu(struct sysdev_class *class,
+ const char *buf,
+ size_t count)
+{
+ struct perf_cpu_context *cpuctx;
+ unsigned long val;
+ int err, cpu, mpt;
+
+ err = strict_strtoul(buf, 10, &val);
+ if (err)
+ return err;
+ if (val > perf_max_counters)
+ return -EINVAL;
+
+ spin_lock(&perf_resource_lock);
+ perf_reserved_percpu = val;
+ for_each_online_cpu(cpu) {
+ cpuctx = &per_cpu(perf_cpu_context, cpu);
+ spin_lock_irq(&cpuctx->ctx.lock);
+ mpt = min(perf_max_counters - cpuctx->ctx.nr_counters,
+ perf_max_counters - perf_reserved_percpu);
+ cpuctx->max_pertask = mpt;
+ spin_unlock_irq(&cpuctx->ctx.lock);
+ }
+ spin_unlock(&perf_resource_lock);
+
+ return count;
+}
+
+static ssize_t perf_show_overcommit(struct sysdev_class *class, char *buf)
+{
+ return sprintf(buf, "%d\n", perf_overcommit);
+}
+
+static ssize_t
+perf_set_overcommit(struct sysdev_class *class, const char *buf, size_t count)
+{
+ unsigned long val;
+ int err;
+
+ err = strict_strtoul(buf, 10, &val);
+ if (err)
+ return err;
+ if (val > 1)
+ return -EINVAL;
+
+ spin_lock(&perf_resource_lock);
+ perf_overcommit = val;
+ spin_unlock(&perf_resource_lock);
+
+ return count;
+}
+
+static SYSDEV_CLASS_ATTR(
+ reserve_percpu,
+ 0644,
+ perf_show_reserve_percpu,
+ perf_set_reserve_percpu
+ );
+
+static SYSDEV_CLASS_ATTR(
+ overcommit,
+ 0644,
+ perf_show_overcommit,
+ perf_set_overcommit
+ );
+
+static struct attribute *perfclass_attrs[] = {
+ &attr_reserve_percpu.attr,
+ &attr_overcommit.attr,
+ NULL
+};
+
+static struct attribute_group perfclass_attr_group = {
+ .attrs = perfclass_attrs,
+ .name = "perf_counters",
+};
+
+static int __init perf_counter_sysfs_init(void)
+{
+ return sysfs_create_group(&cpu_sysdev_class.kset.kobj,
+ &perfclass_attr_group);
+}
+device_initcall(perf_counter_sysfs_init);
#include <linux/uaccess.h>
-/*
- * Initialize a new task whose father had been ptraced.
- *
- * Called from copy_process().
- */
-void ptrace_fork(struct task_struct *child, unsigned long clone_flags)
-{
- arch_ptrace_fork(child, clone_flags);
-}
-
/*
* ptrace a task: make the debugger its new parent and
* move it to the ptrace list.
rcu_ctrlblk.sched_sleep = rcu_sched_sleeping;
spin_unlock_irqrestore(&rcu_ctrlblk.schedlock, flags);
- ret = 0;
+ ret = 0; /* unused */
__wait_event_interruptible(rcu_ctrlblk.sched_wq,
rcu_ctrlblk.sched_sleep != rcu_sched_sleeping,
ret);
- /*
- * Signals would prevent us from sleeping, and we cannot
- * do much with them in any case. So flush them.
- */
- if (ret)
- flush_signals(current);
couldsleepnext = 0;
} while (!kthread_should_stop());
check_cpu_stall(rsp, rdp);
/* Is the RCU core waiting for a quiescent state from this CPU? */
- if (rdp->qs_pending)
+ if (rdp->qs_pending) {
+ rdp->n_rp_qs_pending++;
return 1;
+ }
/* Does this CPU have callbacks ready to invoke? */
- if (cpu_has_callbacks_ready_to_invoke(rdp))
+ if (cpu_has_callbacks_ready_to_invoke(rdp)) {
+ rdp->n_rp_cb_ready++;
return 1;
+ }
/* Has RCU gone idle with this CPU needing another grace period? */
- if (cpu_needs_another_gp(rsp, rdp))
+ if (cpu_needs_another_gp(rsp, rdp)) {
+ rdp->n_rp_cpu_needs_gp++;
return 1;
+ }
/* Has another RCU grace period completed? */
- if (ACCESS_ONCE(rsp->completed) != rdp->completed) /* outside of lock */
+ if (ACCESS_ONCE(rsp->completed) != rdp->completed) { /* outside lock */
+ rdp->n_rp_gp_completed++;
return 1;
+ }
/* Has a new RCU grace period started? */
- if (ACCESS_ONCE(rsp->gpnum) != rdp->gpnum) /* outside of lock */
+ if (ACCESS_ONCE(rsp->gpnum) != rdp->gpnum) { /* outside lock */
+ rdp->n_rp_gp_started++;
return 1;
+ }
/* Has an RCU GP gone long enough to send resched IPIs &c? */
if (ACCESS_ONCE(rsp->completed) != ACCESS_ONCE(rsp->gpnum) &&
- ((long)(ACCESS_ONCE(rsp->jiffies_force_qs) - jiffies) < 0))
+ ((long)(ACCESS_ONCE(rsp->jiffies_force_qs) - jiffies) < 0)) {
+ rdp->n_rp_need_fqs++;
return 1;
+ }
/* nothing to do */
+ rdp->n_rp_need_nothing++;
return 0;
}
.release = single_release,
};
-static struct dentry *rcudir, *datadir, *datadir_csv, *hierdir, *gpdir;
+static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp)
+{
+ seq_printf(m, "%3d%cnp=%ld "
+ "qsp=%ld cbr=%ld cng=%ld gpc=%ld gps=%ld nf=%ld nn=%ld\n",
+ rdp->cpu,
+ cpu_is_offline(rdp->cpu) ? '!' : ' ',
+ rdp->n_rcu_pending,
+ rdp->n_rp_qs_pending,
+ rdp->n_rp_cb_ready,
+ rdp->n_rp_cpu_needs_gp,
+ rdp->n_rp_gp_completed,
+ rdp->n_rp_gp_started,
+ rdp->n_rp_need_fqs,
+ rdp->n_rp_need_nothing);
+}
+
+static void print_rcu_pendings(struct seq_file *m, struct rcu_state *rsp)
+{
+ int cpu;
+ struct rcu_data *rdp;
+
+ for_each_possible_cpu(cpu) {
+ rdp = rsp->rda[cpu];
+ if (rdp->beenonline)
+ print_one_rcu_pending(m, rdp);
+ }
+}
+
+static int show_rcu_pending(struct seq_file *m, void *unused)
+{
+ seq_puts(m, "rcu:\n");
+ print_rcu_pendings(m, &rcu_state);
+ seq_puts(m, "rcu_bh:\n");
+ print_rcu_pendings(m, &rcu_bh_state);
+ return 0;
+}
+
+static int rcu_pending_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, show_rcu_pending, NULL);
+}
+
+static struct file_operations rcu_pending_fops = {
+ .owner = THIS_MODULE,
+ .open = rcu_pending_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct dentry *rcudir;
+static struct dentry *datadir;
+static struct dentry *datadir_csv;
+static struct dentry *gpdir;
+static struct dentry *hierdir;
+static struct dentry *rcu_pendingdir;
+
static int __init rcuclassic_trace_init(void)
{
rcudir = debugfs_create_dir("rcu", NULL);
NULL, &rcuhier_fops);
if (!hierdir)
goto free_out;
+
+ rcu_pendingdir = debugfs_create_file("rcu_pending", 0444, rcudir,
+ NULL, &rcu_pending_fops);
+ if (!rcu_pendingdir)
+ goto free_out;
return 0;
free_out:
if (datadir)
debugfs_remove(datadir_csv);
debugfs_remove(gpdir);
debugfs_remove(hierdir);
+ debugfs_remove(rcu_pendingdir);
debugfs_remove(rcudir);
}
* assigned pending owner [which might not have taken the
* lock yet]:
*/
-static inline int try_to_steal_lock(struct rt_mutex *lock)
+static inline int try_to_steal_lock(struct rt_mutex *lock,
+ struct task_struct *task)
{
struct task_struct *pendowner = rt_mutex_owner(lock);
struct rt_mutex_waiter *next;
if (!rt_mutex_owner_pending(lock))
return 0;
- if (pendowner == current)
+ if (pendowner == task)
return 1;
spin_lock_irqsave(&pendowner->pi_lock, flags);
- if (current->prio >= pendowner->prio) {
+ if (task->prio >= pendowner->prio) {
spin_unlock_irqrestore(&pendowner->pi_lock, flags);
return 0;
}
* We are going to steal the lock and a waiter was
* enqueued on the pending owners pi_waiters queue. So
* we have to enqueue this waiter into
- * current->pi_waiters list. This covers the case,
- * where current is boosted because it holds another
+ * task->pi_waiters list. This covers the case,
+ * where task is boosted because it holds another
* lock and gets unboosted because the booster is
* interrupted, so we would delay a waiter with higher
- * priority as current->normal_prio.
+ * priority as task->normal_prio.
*
* Note: in the rare case of a SCHED_OTHER task changing
* its priority and thus stealing the lock, next->task
- * might be current:
+ * might be task:
*/
- if (likely(next->task != current)) {
- spin_lock_irqsave(¤t->pi_lock, flags);
- plist_add(&next->pi_list_entry, ¤t->pi_waiters);
- __rt_mutex_adjust_prio(current);
- spin_unlock_irqrestore(¤t->pi_lock, flags);
+ if (likely(next->task != task)) {
+ spin_lock_irqsave(&task->pi_lock, flags);
+ plist_add(&next->pi_list_entry, &task->pi_waiters);
+ __rt_mutex_adjust_prio(task);
+ spin_unlock_irqrestore(&task->pi_lock, flags);
}
return 1;
}
*/
mark_rt_mutex_waiters(lock);
- if (rt_mutex_owner(lock) && !try_to_steal_lock(lock))
+ if (rt_mutex_owner(lock) && !try_to_steal_lock(lock, current))
return 0;
/* We got the lock. */
*/
static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
struct rt_mutex_waiter *waiter,
+ struct task_struct *task,
int detect_deadlock)
{
struct task_struct *owner = rt_mutex_owner(lock);
unsigned long flags;
int chain_walk = 0, res;
- spin_lock_irqsave(¤t->pi_lock, flags);
- __rt_mutex_adjust_prio(current);
- waiter->task = current;
+ spin_lock_irqsave(&task->pi_lock, flags);
+ __rt_mutex_adjust_prio(task);
+ waiter->task = task;
waiter->lock = lock;
- plist_node_init(&waiter->list_entry, current->prio);
- plist_node_init(&waiter->pi_list_entry, current->prio);
+ plist_node_init(&waiter->list_entry, task->prio);
+ plist_node_init(&waiter->pi_list_entry, task->prio);
/* Get the top priority waiter on the lock */
if (rt_mutex_has_waiters(lock))
top_waiter = rt_mutex_top_waiter(lock);
plist_add(&waiter->list_entry, &lock->wait_list);
- current->pi_blocked_on = waiter;
+ task->pi_blocked_on = waiter;
- spin_unlock_irqrestore(¤t->pi_lock, flags);
+ spin_unlock_irqrestore(&task->pi_lock, flags);
if (waiter == rt_mutex_top_waiter(lock)) {
spin_lock_irqsave(&owner->pi_lock, flags);
spin_unlock(&lock->wait_lock);
res = rt_mutex_adjust_prio_chain(owner, detect_deadlock, lock, waiter,
- current);
+ task);
spin_lock(&lock->wait_lock);
rt_mutex_adjust_prio_chain(task, 0, NULL, NULL, task);
}
-/*
- * Slow path lock function:
+/**
+ * __rt_mutex_slowlock() - Perform the wait-wake-try-to-take loop
+ * @lock: the rt_mutex to take
+ * @state: the state the task should block in (TASK_INTERRUPTIBLE
+ * or TASK_UNINTERRUPTIBLE)
+ * @timeout: the pre-initialized and started timer, or NULL for none
+ * @waiter: the pre-initialized rt_mutex_waiter
+ * @detect_deadlock: passed to task_blocks_on_rt_mutex
+ *
+ * lock->wait_lock must be held by the caller.
*/
static int __sched
-rt_mutex_slowlock(struct rt_mutex *lock, int state,
- struct hrtimer_sleeper *timeout,
- int detect_deadlock)
+__rt_mutex_slowlock(struct rt_mutex *lock, int state,
+ struct hrtimer_sleeper *timeout,
+ struct rt_mutex_waiter *waiter,
+ int detect_deadlock)
{
- struct rt_mutex_waiter waiter;
int ret = 0;
- debug_rt_mutex_init_waiter(&waiter);
- waiter.task = NULL;
-
- spin_lock(&lock->wait_lock);
-
- /* Try to acquire the lock again: */
- if (try_to_take_rt_mutex(lock)) {
- spin_unlock(&lock->wait_lock);
- return 0;
- }
-
- set_current_state(state);
-
- /* Setup the timer, when timeout != NULL */
- if (unlikely(timeout)) {
- hrtimer_start_expires(&timeout->timer, HRTIMER_MODE_ABS);
- if (!hrtimer_active(&timeout->timer))
- timeout->task = NULL;
- }
-
for (;;) {
/* Try to acquire the lock: */
if (try_to_take_rt_mutex(lock))
}
/*
- * waiter.task is NULL the first time we come here and
+ * waiter->task is NULL the first time we come here and
* when we have been woken up by the previous owner
* but the lock got stolen by a higher prio task.
*/
- if (!waiter.task) {
- ret = task_blocks_on_rt_mutex(lock, &waiter,
+ if (!waiter->task) {
+ ret = task_blocks_on_rt_mutex(lock, waiter, current,
detect_deadlock);
/*
* If we got woken up by the owner then start loop
* all over without going into schedule to try
* to get the lock now:
*/
- if (unlikely(!waiter.task)) {
+ if (unlikely(!waiter->task)) {
/*
* Reset the return value. We might
* have returned with -EDEADLK and the
spin_unlock(&lock->wait_lock);
- debug_rt_mutex_print_deadlock(&waiter);
+ debug_rt_mutex_print_deadlock(waiter);
- if (waiter.task)
+ if (waiter->task)
schedule_rt_mutex(lock);
spin_lock(&lock->wait_lock);
set_current_state(state);
}
+ return ret;
+}
+
+/*
+ * Slow path lock function:
+ */
+static int __sched
+rt_mutex_slowlock(struct rt_mutex *lock, int state,
+ struct hrtimer_sleeper *timeout,
+ int detect_deadlock)
+{
+ struct rt_mutex_waiter waiter;
+ int ret = 0;
+
+ debug_rt_mutex_init_waiter(&waiter);
+ waiter.task = NULL;
+
+ spin_lock(&lock->wait_lock);
+
+ /* Try to acquire the lock again: */
+ if (try_to_take_rt_mutex(lock)) {
+ spin_unlock(&lock->wait_lock);
+ return 0;
+ }
+
+ set_current_state(state);
+
+ /* Setup the timer, when timeout != NULL */
+ if (unlikely(timeout)) {
+ hrtimer_start_expires(&timeout->timer, HRTIMER_MODE_ABS);
+ if (!hrtimer_active(&timeout->timer))
+ timeout->task = NULL;
+ }
+
+ ret = __rt_mutex_slowlock(lock, state, timeout, &waiter,
+ detect_deadlock);
+
set_current_state(TASK_RUNNING);
if (unlikely(waiter.task))
EXPORT_SYMBOL_GPL(rt_mutex_lock_interruptible);
/**
- * rt_mutex_lock_interruptible_ktime - lock a rt_mutex interruptible
- * the timeout structure is provided
- * by the caller
+ * rt_mutex_timed_lock - lock a rt_mutex interruptible
+ * the timeout structure is provided
+ * by the caller
*
* @lock: the rt_mutex to be locked
* @timeout: timeout structure or NULL (no timeout)
}
EXPORT_SYMBOL_GPL(rt_mutex_unlock);
-/***
+/**
* rt_mutex_destroy - mark a mutex unusable
* @lock: the mutex to be destroyed
*
rt_mutex_deadlock_account_unlock(proxy_owner);
}
+/**
+ * rt_mutex_start_proxy_lock() - Start lock acquisition for another task
+ * @lock: the rt_mutex to take
+ * @waiter: the pre-initialized rt_mutex_waiter
+ * @task: the task to prepare
+ * @detect_deadlock: perform deadlock detection (1) or not (0)
+ *
+ * Returns:
+ * 0 - task blocked on lock
+ * 1 - acquired the lock for task, caller should wake it up
+ * <0 - error
+ *
+ * Special API call for FUTEX_REQUEUE_PI support.
+ */
+int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
+ struct rt_mutex_waiter *waiter,
+ struct task_struct *task, int detect_deadlock)
+{
+ int ret;
+
+ spin_lock(&lock->wait_lock);
+
+ mark_rt_mutex_waiters(lock);
+
+ if (!rt_mutex_owner(lock) || try_to_steal_lock(lock, task)) {
+ /* We got the lock for task. */
+ debug_rt_mutex_lock(lock);
+
+ rt_mutex_set_owner(lock, task, 0);
+
+ rt_mutex_deadlock_account_lock(lock, task);
+ return 1;
+ }
+
+ ret = task_blocks_on_rt_mutex(lock, waiter, task, detect_deadlock);
+
+
+ if (ret && !waiter->task) {
+ /*
+ * Reset the return value. We might have
+ * returned with -EDEADLK and the owner
+ * released the lock while we were walking the
+ * pi chain. Let the waiter sort it out.
+ */
+ ret = 0;
+ }
+ spin_unlock(&lock->wait_lock);
+
+ debug_rt_mutex_print_deadlock(waiter);
+
+ return ret;
+}
+
/**
* rt_mutex_next_owner - return the next owner of the lock
*
return rt_mutex_top_waiter(lock)->task;
}
+
+/**
+ * rt_mutex_finish_proxy_lock() - Complete lock acquisition
+ * @lock: the rt_mutex we were woken on
+ * @to: the timeout, null if none. hrtimer should already have
+ * been started.
+ * @waiter: the pre-initialized rt_mutex_waiter
+ * @detect_deadlock: perform deadlock detection (1) or not (0)
+ *
+ * Complete the lock acquisition started our behalf by another thread.
+ *
+ * Returns:
+ * 0 - success
+ * <0 - error, one of -EINTR, -ETIMEDOUT, or -EDEADLK
+ *
+ * Special API call for PI-futex requeue support
+ */
+int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
+ struct hrtimer_sleeper *to,
+ struct rt_mutex_waiter *waiter,
+ int detect_deadlock)
+{
+ int ret;
+
+ spin_lock(&lock->wait_lock);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ ret = __rt_mutex_slowlock(lock, TASK_INTERRUPTIBLE, to, waiter,
+ detect_deadlock);
+
+ set_current_state(TASK_RUNNING);
+
+ if (unlikely(waiter->task))
+ remove_waiter(lock, waiter);
+
+ /*
+ * try_to_take_rt_mutex() sets the waiter bit unconditionally. We might
+ * have to fix that up.
+ */
+ fixup_rt_mutex_waiters(lock);
+
+ spin_unlock(&lock->wait_lock);
+
+ /*
+ * Readjust priority, when we did not get the lock. We might have been
+ * the pending owner and boosted. Since we did not take the lock, the
+ * PI boost has to go.
+ */
+ if (unlikely(ret))
+ rt_mutex_adjust_prio(current);
+
+ return ret;
+}
struct task_struct *proxy_owner);
extern void rt_mutex_proxy_unlock(struct rt_mutex *lock,
struct task_struct *proxy_owner);
+extern int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
+ struct rt_mutex_waiter *waiter,
+ struct task_struct *task,
+ int detect_deadlock);
+extern int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
+ struct hrtimer_sleeper *to,
+ struct rt_mutex_waiter *waiter,
+ int detect_deadlock);
#ifdef CONFIG_DEBUG_RT_MUTEXES
# include "rtmutex-debug.h"
#include <linux/completion.h>
#include <linux/kernel_stat.h>
#include <linux/debug_locks.h>
+#include <linux/perf_counter.h>
#include <linux/security.h>
#include <linux/notifier.h>
#include <linux/profile.h>
#include <linux/debugfs.h>
#include <linux/ctype.h>
#include <linux/ftrace.h>
-#include <trace/sched.h>
#include <asm/tlb.h>
#include <asm/irq_regs.h>
#include "sched_cpupri.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/sched.h>
+
/*
* Convert user-nice values [ -20 ... 0 ... 19 ]
* to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
*/
#define RUNTIME_INF ((u64)~0ULL)
-DEFINE_TRACE(sched_wait_task);
-DEFINE_TRACE(sched_wakeup);
-DEFINE_TRACE(sched_wakeup_new);
-DEFINE_TRACE(sched_switch);
-DEFINE_TRACE(sched_migrate_task);
-
#ifdef CONFIG_SMP
static void double_rq_lock(struct rq *rq1, struct rq *rq2);
struct load_weight load;
unsigned long nr_load_updates;
u64 nr_switches;
+ u64 nr_migrations_in;
struct cfs_rq cfs;
struct rt_rq rt;
struct list_head migration_queue;
#endif
+ /* calc_load related fields */
+ unsigned long calc_load_update;
+ long calc_load_active;
+
#ifdef CONFIG_SCHED_HRTICK
#ifdef CONFIG_SMP
int hrtick_csd_pending;
#define task_rq(p) cpu_rq(task_cpu(p))
#define cpu_curr(cpu) (cpu_rq(cpu)->curr)
-static inline void update_rq_clock(struct rq *rq)
+inline void update_rq_clock(struct rq *rq)
{
rq->clock = sched_clock_cpu(cpu_of(rq));
}
}
#endif
+static void calc_load_account_active(struct rq *this_rq);
+
#include "sched_stats.h"
#include "sched_idletask.c"
#include "sched_fair.c"
clock_offset = old_rq->clock - new_rq->clock;
- trace_sched_migrate_task(p, task_cpu(p), new_cpu);
+ trace_sched_migrate_task(p, new_cpu);
#ifdef CONFIG_SCHEDSTATS
if (p->se.wait_start)
p->se.sleep_start -= clock_offset;
if (p->se.block_start)
p->se.block_start -= clock_offset;
+#endif
if (old_cpu != new_cpu) {
- schedstat_inc(p, se.nr_migrations);
+ p->se.nr_migrations++;
+ new_rq->nr_migrations_in++;
+#ifdef CONFIG_SCHEDSTATS
if (task_hot(p, old_rq->clock, NULL))
schedstat_inc(p, se.nr_forced2_migrations);
- }
#endif
+ perf_counter_task_migration(p, new_cpu);
+ }
p->se.vruntime -= old_cfsrq->min_vruntime -
new_cfsrq->min_vruntime;
return 1;
}
+/*
+ * wait_task_context_switch - wait for a thread to complete at least one
+ * context switch.
+ *
+ * @p must not be current.
+ */
+void wait_task_context_switch(struct task_struct *p)
+{
+ unsigned long nvcsw, nivcsw, flags;
+ int running;
+ struct rq *rq;
+
+ nvcsw = p->nvcsw;
+ nivcsw = p->nivcsw;
+ for (;;) {
+ /*
+ * The runqueue is assigned before the actual context
+ * switch. We need to take the runqueue lock.
+ *
+ * We could check initially without the lock but it is
+ * very likely that we need to take the lock in every
+ * iteration.
+ */
+ rq = task_rq_lock(p, &flags);
+ running = task_running(rq, p);
+ task_rq_unlock(rq, &flags);
+
+ if (likely(!running))
+ break;
+ /*
+ * The switch count is incremented before the actual
+ * context switch. We thus wait for two switches to be
+ * sure at least one completed.
+ */
+ if ((p->nvcsw - nvcsw) > 1)
+ break;
+ if ((p->nivcsw - nivcsw) > 1)
+ break;
+
+ cpu_relax();
+ }
+}
+
/*
* wait_task_inactive - wait for a thread to unschedule.
*
#endif /* CONFIG_SMP */
+/**
+ * task_oncpu_function_call - call a function on the cpu on which a task runs
+ * @p: the task to evaluate
+ * @func: the function to be called
+ * @info: the function call argument
+ *
+ * Calls the function @func when the task is currently running. This might
+ * be on the current CPU, which just calls the function directly
+ */
+void task_oncpu_function_call(struct task_struct *p,
+ void (*func) (void *info), void *info)
+{
+ int cpu;
+
+ preempt_disable();
+ cpu = task_cpu(p);
+ if (task_curr(p))
+ smp_call_function_single(cpu, func, info, 1);
+ preempt_enable();
+}
+
/***
* try_to_wake_up - wake up a thread
* @p: the to-be-woken-up thread
return success;
}
+/**
+ * wake_up_process - Wake up a specific process
+ * @p: The process to be woken up.
+ *
+ * Attempt to wake up the nominated process and move it to the set of runnable
+ * processes. Returns 1 if the process was woken up, 0 if it was already
+ * running.
+ *
+ * It may be assumed that this function implies a write memory barrier before
+ * changing the task state if and only if any tasks are woken up.
+ */
int wake_up_process(struct task_struct *p)
{
return try_to_wake_up(p, TASK_ALL, 0);
p->se.exec_start = 0;
p->se.sum_exec_runtime = 0;
p->se.prev_sum_exec_runtime = 0;
+ p->se.nr_migrations = 0;
p->se.last_wakeup = 0;
p->se.avg_overlap = 0;
p->se.start_runtime = 0;
*/
prev_state = prev->state;
finish_arch_switch(prev);
+ perf_counter_task_sched_in(current, cpu_of(rq));
finish_lock_switch(rq, prev);
#ifdef CONFIG_SMP
if (post_schedule)
* combine the page table reload and the switch backend into
* one hypercall.
*/
- arch_enter_lazy_cpu_mode();
+ arch_start_context_switch(prev);
if (unlikely(!mm)) {
next->active_mm = oldmm;
return sum;
}
-unsigned long nr_active(void)
+/* Variables and functions for calc_load */
+static atomic_long_t calc_load_tasks;
+static unsigned long calc_load_update;
+unsigned long avenrun[3];
+EXPORT_SYMBOL(avenrun);
+
+/**
+ * get_avenrun - get the load average array
+ * @loads: pointer to dest load array
+ * @offset: offset to add
+ * @shift: shift count to shift the result left
+ *
+ * These values are estimates at best, so no need for locking.
+ */
+void get_avenrun(unsigned long *loads, unsigned long offset, int shift)
{
- unsigned long i, running = 0, uninterruptible = 0;
+ loads[0] = (avenrun[0] + offset) << shift;
+ loads[1] = (avenrun[1] + offset) << shift;
+ loads[2] = (avenrun[2] + offset) << shift;
+}
- for_each_online_cpu(i) {
- running += cpu_rq(i)->nr_running;
- uninterruptible += cpu_rq(i)->nr_uninterruptible;
- }
+static unsigned long
+calc_load(unsigned long load, unsigned long exp, unsigned long active)
+{
+ load *= exp;
+ load += active * (FIXED_1 - exp);
+ return load >> FSHIFT;
+}
- if (unlikely((long)uninterruptible < 0))
- uninterruptible = 0;
+/*
+ * calc_load - update the avenrun load estimates 10 ticks after the
+ * CPUs have updated calc_load_tasks.
+ */
+void calc_global_load(void)
+{
+ unsigned long upd = calc_load_update + 10;
+ long active;
- return running + uninterruptible;
+ if (time_before(jiffies, upd))
+ return;
+
+ active = atomic_long_read(&calc_load_tasks);
+ active = active > 0 ? active * FIXED_1 : 0;
+
+ avenrun[0] = calc_load(avenrun[0], EXP_1, active);
+ avenrun[1] = calc_load(avenrun[1], EXP_5, active);
+ avenrun[2] = calc_load(avenrun[2], EXP_15, active);
+
+ calc_load_update += LOAD_FREQ;
+}
+
+/*
+ * Either called from update_cpu_load() or from a cpu going idle
+ */
+static void calc_load_account_active(struct rq *this_rq)
+{
+ long nr_active, delta;
+
+ nr_active = this_rq->nr_running;
+ nr_active += (long) this_rq->nr_uninterruptible;
+
+ if (nr_active != this_rq->calc_load_active) {
+ delta = nr_active - this_rq->calc_load_active;
+ this_rq->calc_load_active = nr_active;
+ atomic_long_add(delta, &calc_load_tasks);
+ }
+}
+
+/*
+ * Externally visible per-cpu scheduler statistics:
+ * cpu_nr_migrations(cpu) - number of migrations into that cpu
+ */
+u64 cpu_nr_migrations(int cpu)
+{
+ return cpu_rq(cpu)->nr_migrations_in;
}
/*
new_load += scale-1;
this_rq->cpu_load[i] = (old_load*(scale-1) + new_load) >> i;
}
+
+ if (time_after_eq(jiffies, this_rq->calc_load_update)) {
+ this_rq->calc_load_update += LOAD_FREQ;
+ calc_load_account_active(this_rq);
+ }
}
#ifdef CONFIG_SMP
static struct {
atomic_t load_balancer;
cpumask_var_t cpu_mask;
+ cpumask_var_t ilb_grp_nohz_mask;
} nohz ____cacheline_aligned = {
.load_balancer = ATOMIC_INIT(-1),
};
+#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
+/**
+ * lowest_flag_domain - Return lowest sched_domain containing flag.
+ * @cpu: The cpu whose lowest level of sched domain is to
+ * be returned.
+ * @flag: The flag to check for the lowest sched_domain
+ * for the given cpu.
+ *
+ * Returns the lowest sched_domain of a cpu which contains the given flag.
+ */
+static inline struct sched_domain *lowest_flag_domain(int cpu, int flag)
+{
+ struct sched_domain *sd;
+
+ for_each_domain(cpu, sd)
+ if (sd && (sd->flags & flag))
+ break;
+
+ return sd;
+}
+
+/**
+ * for_each_flag_domain - Iterates over sched_domains containing the flag.
+ * @cpu: The cpu whose domains we're iterating over.
+ * @sd: variable holding the value of the power_savings_sd
+ * for cpu.
+ * @flag: The flag to filter the sched_domains to be iterated.
+ *
+ * Iterates over all the scheduler domains for a given cpu that has the 'flag'
+ * set, starting from the lowest sched_domain to the highest.
+ */
+#define for_each_flag_domain(cpu, sd, flag) \
+ for (sd = lowest_flag_domain(cpu, flag); \
+ (sd && (sd->flags & flag)); sd = sd->parent)
+
+/**
+ * is_semi_idle_group - Checks if the given sched_group is semi-idle.
+ * @ilb_group: group to be checked for semi-idleness
+ *
+ * Returns: 1 if the group is semi-idle. 0 otherwise.
+ *
+ * We define a sched_group to be semi idle if it has atleast one idle-CPU
+ * and atleast one non-idle CPU. This helper function checks if the given
+ * sched_group is semi-idle or not.
+ */
+static inline int is_semi_idle_group(struct sched_group *ilb_group)
+{
+ cpumask_and(nohz.ilb_grp_nohz_mask, nohz.cpu_mask,
+ sched_group_cpus(ilb_group));
+
+ /*
+ * A sched_group is semi-idle when it has atleast one busy cpu
+ * and atleast one idle cpu.
+ */
+ if (cpumask_empty(nohz.ilb_grp_nohz_mask))
+ return 0;
+
+ if (cpumask_equal(nohz.ilb_grp_nohz_mask, sched_group_cpus(ilb_group)))
+ return 0;
+
+ return 1;
+}
+/**
+ * find_new_ilb - Finds the optimum idle load balancer for nomination.
+ * @cpu: The cpu which is nominating a new idle_load_balancer.
+ *
+ * Returns: Returns the id of the idle load balancer if it exists,
+ * Else, returns >= nr_cpu_ids.
+ *
+ * This algorithm picks the idle load balancer such that it belongs to a
+ * semi-idle powersavings sched_domain. The idea is to try and avoid
+ * completely idle packages/cores just for the purpose of idle load balancing
+ * when there are other idle cpu's which are better suited for that job.
+ */
+static int find_new_ilb(int cpu)
+{
+ struct sched_domain *sd;
+ struct sched_group *ilb_group;
+
+ /*
+ * Have idle load balancer selection from semi-idle packages only
+ * when power-aware load balancing is enabled
+ */
+ if (!(sched_smt_power_savings || sched_mc_power_savings))
+ goto out_done;
+
+ /*
+ * Optimize for the case when we have no idle CPUs or only one
+ * idle CPU. Don't walk the sched_domain hierarchy in such cases
+ */
+ if (cpumask_weight(nohz.cpu_mask) < 2)
+ goto out_done;
+
+ for_each_flag_domain(cpu, sd, SD_POWERSAVINGS_BALANCE) {
+ ilb_group = sd->groups;
+
+ do {
+ if (is_semi_idle_group(ilb_group))
+ return cpumask_first(nohz.ilb_grp_nohz_mask);
+
+ ilb_group = ilb_group->next;
+
+ } while (ilb_group != sd->groups);
+ }
+
+out_done:
+ return cpumask_first(nohz.cpu_mask);
+}
+#else /* (CONFIG_SCHED_MC || CONFIG_SCHED_SMT) */
+static inline int find_new_ilb(int call_cpu)
+{
+ return cpumask_first(nohz.cpu_mask);
+}
+#endif
+
/*
* This routine will try to nominate the ilb (idle load balancing)
* owner among the cpus whose ticks are stopped. ilb owner will do the idle
/* make me the ilb owner */
if (atomic_cmpxchg(&nohz.load_balancer, -1, cpu) == -1)
return 1;
- } else if (atomic_read(&nohz.load_balancer) == cpu)
+ } else if (atomic_read(&nohz.load_balancer) == cpu) {
+ int new_ilb;
+
+ if (!(sched_smt_power_savings ||
+ sched_mc_power_savings))
+ return 1;
+ /*
+ * Check to see if there is a more power-efficient
+ * ilb.
+ */
+ new_ilb = find_new_ilb(cpu);
+ if (new_ilb < nr_cpu_ids && new_ilb != cpu) {
+ atomic_set(&nohz.load_balancer, -1);
+ resched_cpu(new_ilb);
+ return 0;
+ }
return 1;
+ }
} else {
if (!cpumask_test_cpu(cpu, nohz.cpu_mask))
return 0;
}
if (atomic_read(&nohz.load_balancer) == -1) {
- /*
- * simple selection for now: Nominate the
- * first cpu in the nohz list to be the next
- * ilb owner.
- *
- * TBD: Traverse the sched domains and nominate
- * the nearest cpu in the nohz.cpu_mask.
- */
- int ilb = cpumask_first(nohz.cpu_mask);
+ int ilb = find_new_ilb(cpu);
if (ilb < nr_cpu_ids)
resched_cpu(ilb);
curr->sched_class->task_tick(rq, curr, 0);
spin_unlock(&rq->lock);
+ perf_counter_task_tick(curr, cpu);
+
#ifdef CONFIG_SMP
rq->idle_at_tick = idle_cpu(cpu);
trigger_load_balance(rq, cpu);
/*
* schedule() is the main scheduler function.
*/
-asmlinkage void __sched __schedule(void)
+asmlinkage void __sched schedule(void)
{
struct task_struct *prev, *next;
unsigned long *switch_count;
struct rq *rq;
int cpu;
+need_resched:
+ preempt_disable();
cpu = smp_processor_id();
rq = cpu_rq(cpu);
rcu_qsctr_inc(cpu);
if (likely(prev != next)) {
sched_info_switch(prev, next);
+ perf_counter_task_sched_out(prev, next, cpu);
rq->nr_switches++;
rq->curr = next;
if (unlikely(reacquire_kernel_lock(current) < 0))
goto need_resched_nonpreemptible;
-}
-asmlinkage void __sched schedule(void)
-{
-need_resched:
- preempt_disable();
- __schedule();
preempt_enable_no_resched();
- if (unlikely(test_thread_flag(TIF_NEED_RESCHED)))
+ if (need_resched())
goto need_resched;
}
EXPORT_SYMBOL(schedule);
* started to run but is not in state TASK_RUNNING. try_to_wake_up() returns
* zero in this (rare) case, and we handle it by continuing to scan the queue.
*/
-void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
+static void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
int nr_exclusive, int sync, void *key)
{
wait_queue_t *curr, *next;
* @mode: which threads
* @nr_exclusive: how many wake-one or wake-many threads to wake up
* @key: is directly passed to the wakeup function
+ *
+ * It may be assumed that this function implies a write memory barrier before
+ * changing the task state if and only if any tasks are woken up.
*/
void __wake_up(wait_queue_head_t *q, unsigned int mode,
int nr_exclusive, void *key)
* with each other. This can prevent needless bouncing between CPUs.
*
* On UP it can prevent extra preemption.
+ *
+ * It may be assumed that this function implies a write memory barrier before
+ * changing the task state if and only if any tasks are woken up.
*/
void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode,
int nr_exclusive, void *key)
* awakened in the same order in which they were queued.
*
* See also complete_all(), wait_for_completion() and related routines.
+ *
+ * It may be assumed that this function implies a write memory barrier before
+ * changing the task state if and only if any tasks are woken up.
*/
void complete(struct completion *x)
{
* @x: holds the state of this particular completion
*
* This will wake up all threads waiting on this particular completion event.
+ *
+ * It may be assumed that this function implies a write memory barrier before
+ * changing the task state if and only if any tasks are woken up.
*/
void complete_all(struct completion *x)
{
#ifdef CONFIG_DEBUG_STACK_USAGE
free = stack_not_used(p);
#endif
- printk(KERN_CONT "%5lu %5d %6d\n", free,
- task_pid_nr(p), task_pid_nr(p->real_parent));
+ printk(KERN_CONT "%5lu %5d %6d 0x%08lx\n", free,
+ task_pid_nr(p), task_pid_nr(p->real_parent),
+ (unsigned long)task_thread_info(p)->flags);
show_stack(p, NULL);
}
}
}
+
+/*
+ * remove the tasks which were accounted by rq from calc_load_tasks.
+ */
+static void calc_global_load_remove(struct rq *rq)
+{
+ atomic_long_sub(rq->calc_load_active, &calc_load_tasks);
+}
#endif /* CONFIG_HOTPLUG_CPU */
#if defined(CONFIG_SCHED_DEBUG) && defined(CONFIG_SYSCTL)
/* Update our root-domain */
rq = cpu_rq(cpu);
spin_lock_irqsave(&rq->lock, flags);
+ rq->calc_load_update = calc_load_update;
+ rq->calc_load_active = 0;
if (rq->rd) {
BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
cpuset_unlock();
migrate_nr_uninterruptible(rq);
BUG_ON(rq->nr_running != 0);
-
+ calc_global_load_remove(rq);
/*
* No need to migrate the tasks: it was best-effort if
* they didn't take sched_hotcpu_mutex. Just wake up
return NOTIFY_OK;
}
-/* Register at highest priority so that task migration (migrate_all_tasks)
- * happens before everything else.
+/*
+ * Register at high priority so that task migration (migrate_all_tasks)
+ * happens before everything else. This has to be lower priority than
+ * the notifier in the perf_counter subsystem, though.
*/
static struct notifier_block __cpuinitdata migration_notifier = {
.notifier_call = migration_call,
/*
* The cpus mask in sched_group and sched_domain hangs off the end.
- * FIXME: use cpumask_var_t or dynamic percpu alloc to avoid wasting space
- * for nr_cpu_ids < CONFIG_NR_CPUS.
+ *
+ * ( See the the comments in include/linux/sched.h:struct sched_group
+ * and struct sched_domain. )
*/
struct static_sched_group {
struct sched_group sg;
struct sched_domain *sd;
sd = &per_cpu(phys_domains, j).sd;
- if (j != cpumask_first(sched_group_cpus(sd->groups))) {
+ if (j != group_first_cpu(sd->groups)) {
/*
* Only add "power" once for each
* physical package.
WARN_ON(!sd || !sd->groups);
- if (cpu != cpumask_first(sched_group_cpus(sd->groups)))
+ if (cpu != group_first_cpu(sd->groups))
return;
child = sd->child;
rq = cpu_rq(i);
spin_lock_init(&rq->lock);
rq->nr_running = 0;
+ rq->calc_load_active = 0;
+ rq->calc_load_update = jiffies + LOAD_FREQ;
init_cfs_rq(&rq->cfs, rq);
init_rt_rq(&rq->rt, rq);
#ifdef CONFIG_FAIR_GROUP_SCHED
* 1024) and two child groups A0 and A1 (of weight 1024 each),
* then A0's share of the cpu resource is:
*
- * A0's bandwidth = 1024 / (10*1024 + 1024 + 1024) = 8.33%
+ * A0's bandwidth = 1024 / (10*1024 + 1024 + 1024) = 8.33%
*
* We achieve this by letting init_task_group's tasks sit
* directly in rq->cfs (i.e init_task_group->se[] = NULL).
* when this runqueue becomes "idle".
*/
init_idle(current, smp_processor_id());
+
+ calc_load_update = jiffies + LOAD_FREQ;
+
/*
* During early bootup we pretend to be a normal task:
*/
#ifdef CONFIG_SMP
#ifdef CONFIG_NO_HZ
alloc_bootmem_cpumask_var(&nohz.cpu_mask);
+ alloc_bootmem_cpumask_var(&nohz.ilb_grp_nohz_mask);
#endif
alloc_bootmem_cpumask_var(&cpu_isolated_map);
#endif /* SMP */
+ perf_counter_init();
+
scheduler_running = 1;
}
if (sysctl_sched_rt_period <= 0)
return -EINVAL;
+ /*
+ * There's always some RT tasks in the root group
+ * -- migration, kstopmachine etc..
+ */
+ if (sysctl_sched_rt_runtime == 0)
+ return -EBUSY;
+
spin_lock_irqsave(&def_rt_bandwidth.rt_runtime_lock, flags);
for_each_possible_cpu(i) {
struct rt_rq *rt_rq = &cpu_rq(i)->rt;
find_matching_se(&se, &pse);
- while (se) {
- BUG_ON(!pse);
+ BUG_ON(!pse);
- if (wakeup_preempt_entity(se, pse) == 1) {
- resched_task(curr);
- break;
- }
-
- se = parent_entity(se);
- pse = parent_entity(pse);
- }
+ if (wakeup_preempt_entity(se, pse) == 1)
+ resched_task(curr);
}
static struct task_struct *pick_next_task_fair(struct rq *rq)
static struct task_struct *pick_next_task_idle(struct rq *rq)
{
schedstat_inc(rq, sched_goidle);
-
+ /* adjust the active tasks as we might go into a long sleep */
+ calc_load_account_active(rq);
return rq->idle;
}
#include <linux/freezer.h>
#include <linux/pid_namespace.h>
#include <linux/nsproxy.h>
-#include <trace/sched.h>
+#include <trace/events/sched.h>
#include <asm/param.h>
#include <asm/uaccess.h>
static struct kmem_cache *sigqueue_cachep;
-DEFINE_TRACE(sched_signal_send);
-
static void __user *sig_handler(struct task_struct *t, int sig)
{
return t->sighand->action[sig - 1].sa.sa_handler;
return kill_something_info(sig, &info, pid);
}
-static int do_tkill(pid_t tgid, pid_t pid, int sig)
+static int
+do_send_specific(pid_t tgid, pid_t pid, int sig, struct siginfo *info)
{
- int error;
- struct siginfo info;
struct task_struct *p;
unsigned long flags;
-
- error = -ESRCH;
- info.si_signo = sig;
- info.si_errno = 0;
- info.si_code = SI_TKILL;
- info.si_pid = task_tgid_vnr(current);
- info.si_uid = current_uid();
+ int error = -ESRCH;
rcu_read_lock();
p = find_task_by_vpid(pid);
if (p && (tgid <= 0 || task_tgid_vnr(p) == tgid)) {
- error = check_kill_permission(sig, &info, p);
+ error = check_kill_permission(sig, info, p);
/*
* The null signal is a permissions and process existence
* probe. No signal is actually delivered.
* signal is private anyway.
*/
if (!error && sig && lock_task_sighand(p, &flags)) {
- error = specific_send_sig_info(sig, &info, p);
+ error = specific_send_sig_info(sig, info, p);
unlock_task_sighand(p, &flags);
}
}
return error;
}
+static int do_tkill(pid_t tgid, pid_t pid, int sig)
+{
+ struct siginfo info;
+
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_code = SI_TKILL;
+ info.si_pid = task_tgid_vnr(current);
+ info.si_uid = current_uid();
+
+ return do_send_specific(tgid, pid, sig, &info);
+}
+
/**
* sys_tgkill - send signal to one specific thread
* @tgid: the thread group ID of the thread
return kill_proc_info(sig, &info, pid);
}
+long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info)
+{
+ /* This is only valid for single tasks */
+ if (pid <= 0 || tgid <= 0)
+ return -EINVAL;
+
+ /* Not even root can pretend to send signals from the kernel.
+ Nor can they impersonate a kill(), which adds source info. */
+ if (info->si_code >= 0)
+ return -EPERM;
+ info->si_signo = sig;
+
+ return do_send_specific(tgid, pid, sig, info);
+}
+
+SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig,
+ siginfo_t __user *, uinfo)
+{
+ siginfo_t info;
+
+ if (copy_from_user(&info, uinfo, sizeof(siginfo_t)))
+ return -EFAULT;
+
+ return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
+}
+
int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
{
struct task_struct *t = current;
#include <linux/ftrace.h>
#include <linux/smp.h>
#include <linux/tick.h>
-#include <trace/irq.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/irq.h>
#include <asm/irq.h>
/*
*/
#define MAX_SOFTIRQ_RESTART 10
-DEFINE_TRACE(softirq_entry);
-DEFINE_TRACE(softirq_exit);
-
asmlinkage void __do_softirq(void)
{
struct softirq_action *h;
return 0;
}
-int __weak arch_init_chip_data(struct irq_desc *desc, int cpu)
+int __weak arch_init_chip_data(struct irq_desc *desc, int node)
{
return 0;
}
#include <linux/prctl.h>
#include <linux/highuid.h>
#include <linux/fs.h>
+#include <linux/perf_counter.h>
#include <linux/resource.h>
#include <linux/kernel.h>
#include <linux/kexec.h>
case PR_SET_TSC:
error = SET_TSC_CTL(arg2);
break;
+ case PR_TASK_PERF_COUNTERS_DISABLE:
+ error = perf_counter_task_disable();
+ break;
+ case PR_TASK_PERF_COUNTERS_ENABLE:
+ error = perf_counter_task_enable();
+ break;
case PR_GET_TIMERSLACK:
error = current->timer_slack_ns;
break;
cond_syscall(compat_sys_timerfd_gettime);
cond_syscall(sys_eventfd);
cond_syscall(sys_eventfd2);
+
+/* performance counters: */
+cond_syscall(sys_perf_counter_open);
#include <linux/reboot.h>
#include <linux/ftrace.h>
#include <linux/slow-work.h>
+#include <linux/perf_counter.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
.mode = 0444,
.proc_handler = &proc_dointvec,
},
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "bootloader_version",
+ .data = &bootloader_version,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
{
.ctl_name = CTL_UNNUMBERED,
.procname = "kstack_depth_to_print",
.child = slow_work_sysctls,
},
#endif
+#ifdef CONFIG_PERF_COUNTERS
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "perf_counter_paranoid",
+ .data = &sysctl_perf_counter_paranoid,
+ .maxlen = sizeof(sysctl_perf_counter_paranoid),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "perf_counter_mlock_kb",
+ .data = &sysctl_perf_counter_mlock,
+ .maxlen = sizeof(sysctl_perf_counter_mlock),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "perf_counter_max_sample_rate",
+ .data = &sysctl_perf_counter_sample_rate,
+ .maxlen = sizeof(sysctl_perf_counter_sample_rate),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
/*
* NOTE: do not add new entries to this table unless you have read
* Documentation/sysctl/ctl_unnumbered.txt
/*
* This read-write spinlock protects us from races in SMP while
- * playing with xtime and avenrun.
+ * playing with xtime.
*/
__cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock);
#include <linux/delay.h>
#include <linux/tick.h>
#include <linux/kallsyms.h>
+#include <linux/perf_counter.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
run_posix_cpu_timers(p);
}
-/*
- * Nr of active tasks - counted in fixed-point numbers
- */
-static unsigned long count_active_tasks(void)
-{
- return nr_active() * FIXED_1;
-}
-
-/*
- * Hmm.. Changed this, as the GNU make sources (load.c) seems to
- * imply that avenrun[] is the standard name for this kind of thing.
- * Nothing else seems to be standardized: the fractional size etc
- * all seem to differ on different machines.
- *
- * Requires xtime_lock to access.
- */
-unsigned long avenrun[3];
-
-EXPORT_SYMBOL(avenrun);
-
-/*
- * calc_load - given tick count, update the avenrun load estimates.
- * This is called while holding a write_lock on xtime_lock.
- */
-static inline void calc_load(unsigned long ticks)
-{
- unsigned long active_tasks; /* fixed-point */
- static int count = LOAD_FREQ;
-
- count -= ticks;
- if (unlikely(count < 0)) {
- active_tasks = count_active_tasks();
- do {
- CALC_LOAD(avenrun[0], EXP_1, active_tasks);
- CALC_LOAD(avenrun[1], EXP_5, active_tasks);
- CALC_LOAD(avenrun[2], EXP_15, active_tasks);
- count += LOAD_FREQ;
- } while (count < 0);
- }
-}
-
/*
* This function runs timers and the timer-tq in bottom half context.
*/
{
struct tvec_base *base = __get_cpu_var(tvec_bases);
+ perf_counter_do_pending();
+
hrtimer_run_pending();
if (time_after_eq(jiffies, base->timer_jiffies))
softlockup_tick();
}
-/*
- * Called by the timer interrupt. xtime_lock must already be taken
- * by the timer IRQ!
- */
-static inline void update_times(unsigned long ticks)
-{
- update_wall_time();
- calc_load(ticks);
-}
-
/*
* The 64-bit jiffies value is not atomic - you MUST NOT read it
* without sampling the sequence number in xtime_lock.
void do_timer(unsigned long ticks)
{
jiffies_64 += ticks;
- update_times(ticks);
+ update_wall_time();
+ calc_global_load();
}
#ifdef __ARCH_WANT_SYS_ALARM
{
unsigned long mem_total, sav_total;
unsigned int mem_unit, bitcount;
- unsigned long seq;
+ struct timespec tp;
memset(info, 0, sizeof(struct sysinfo));
- do {
- struct timespec tp;
- seq = read_seqbegin(&xtime_lock);
-
- /*
- * This is annoying. The below is the same thing
- * posix_get_clock_monotonic() does, but it wants to
- * take the lock which we want to cover the loads stuff
- * too.
- */
-
- getnstimeofday(&tp);
- tp.tv_sec += wall_to_monotonic.tv_sec;
- tp.tv_nsec += wall_to_monotonic.tv_nsec;
- monotonic_to_bootbased(&tp);
- if (tp.tv_nsec - NSEC_PER_SEC >= 0) {
- tp.tv_nsec = tp.tv_nsec - NSEC_PER_SEC;
- tp.tv_sec++;
- }
- info->uptime = tp.tv_sec + (tp.tv_nsec ? 1 : 0);
+ ktime_get_ts(&tp);
+ monotonic_to_bootbased(&tp);
+ info->uptime = tp.tv_sec + (tp.tv_nsec ? 1 : 0);
- info->loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
- info->loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
- info->loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
+ get_avenrun(info->loads, 0, SI_LOAD_SHIFT - FSHIFT);
- info->procs = nr_threads;
- } while (read_seqretry(&xtime_lock, seq));
+ info->procs = nr_threads;
si_meminfo(info);
si_swapinfo(info);
depends on HAVE_FTRACE_NMI_ENTER
default y
+config EVENT_TRACING
+ select CONTEXT_SWITCH_TRACER
+ bool
+
+config CONTEXT_SWITCH_TRACER
+ select MARKERS
+ bool
+
+# All tracer options should select GENERIC_TRACER. For those options that are
+# enabled by all tracers (context switch and event tracer) they select TRACING.
+# This allows those options to appear when no other tracer is selected. But the
+# options do not appear when something else selects it. We need the two options
+# GENERIC_TRACER and TRACING to avoid circular dependencies to accomplish the
+# hidding of the automatic options options.
+
config TRACING
bool
select DEBUG_FS
select TRACEPOINTS
select NOP_TRACER
select BINARY_PRINTF
+ select EVENT_TRACING
+
+config GENERIC_TRACER
+ bool
+ select TRACING
#
# Minimum requirements an architecture has to meet for us to
if TRACING_SUPPORT
-menu "Tracers"
+menuconfig FTRACE
+ bool "Tracers"
+ default y if DEBUG_KERNEL
+ help
+ Enable the kernel tracing infrastructure.
+
+if FTRACE
config FUNCTION_TRACER
bool "Kernel Function Tracer"
depends on HAVE_FUNCTION_TRACER
select FRAME_POINTER
select KALLSYMS
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
help
Enable the kernel to trace every kernel function. This is done
the return value. This is done by setting the current return
address on the current task structure into a stack of calls.
+
config IRQSOFF_TRACER
bool "Interrupts-off Latency Tracer"
default n
depends on TRACE_IRQFLAGS_SUPPORT
depends on GENERIC_TIME
select TRACE_IRQFLAGS
- select TRACING
+ select GENERIC_TRACER
select TRACER_MAX_TRACE
help
This option measures the time spent in irqs-off critical
default n
depends on GENERIC_TIME
depends on PREEMPT
- select TRACING
+ select GENERIC_TRACER
select TRACER_MAX_TRACE
help
This option measures the time spent in preemption off critical
config SYSPROF_TRACER
bool "Sysprof Tracer"
depends on X86
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
help
This tracer provides the trace needed by the 'Sysprof' userspace
config SCHED_TRACER
bool "Scheduling Latency Tracer"
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
select TRACER_MAX_TRACE
help
This tracer tracks the latency of the highest priority task
to be scheduled in, starting from the point it has woken up.
-config CONTEXT_SWITCH_TRACER
- bool "Trace process context switches"
- select TRACING
- select MARKERS
- help
- This tracer gets called from the context switch and records
- all switching of tasks.
-
-config EVENT_TRACER
- bool "Trace various events in the kernel"
+config ENABLE_DEFAULT_TRACERS
+ bool "Trace process context switches and events"
+ depends on !GENERIC_TRACER
select TRACING
help
This tracer hooks to various trace points in the kernel
allowing the user to pick and choose which trace point they
- want to trace.
+ want to trace. It also includes the sched_switch tracer plugin.
config FTRACE_SYSCALLS
bool "Trace syscalls"
depends on HAVE_FTRACE_SYSCALLS
- select TRACING
+ select GENERIC_TRACER
select KALLSYMS
help
Basic tracer to catch the syscall entry and exit events.
config BOOT_TRACER
bool "Trace boot initcalls"
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
help
This tracer helps developers to optimize boot times: it records
to enable this on bootup.
config TRACE_BRANCH_PROFILING
+ bool
+ select GENERIC_TRACER
+
+choice
+ prompt "Branch Profiling"
+ default BRANCH_PROFILE_NONE
+ help
+ The branch profiling is a software profiler. It will add hooks
+ into the C conditionals to test which path a branch takes.
+
+ The likely/unlikely profiler only looks at the conditions that
+ are annotated with a likely or unlikely macro.
+
+ The "all branch" profiler will profile every if statement in the
+ kernel. This profiler will also enable the likely/unlikely
+ profiler as well.
+
+ Either of the above profilers add a bit of overhead to the system.
+ If unsure choose "No branch profiling".
+
+config BRANCH_PROFILE_NONE
+ bool "No branch profiling"
+ help
+ No branch profiling. Branch profiling adds a bit of overhead.
+ Only enable it if you want to analyse the branching behavior.
+ Otherwise keep it disabled.
+
+config PROFILE_ANNOTATED_BRANCHES
bool "Trace likely/unlikely profiler"
- select TRACING
+ select TRACE_BRANCH_PROFILING
help
This tracer profiles all the the likely and unlikely macros
in the kernel. It will display the results in:
Note: this will add a significant overhead, only turn this
on if you need to profile the system's use of these macros.
- Say N if unsure.
-
config PROFILE_ALL_BRANCHES
bool "Profile all if conditionals"
- depends on TRACE_BRANCH_PROFILING
+ select TRACE_BRANCH_PROFILING
help
This tracer profiles all branch conditions. Every if ()
taken in the kernel is recorded whether it hit or miss.
/debugfs/tracing/profile_branch
+ This option also enables the likely/unlikely profiler.
+
This configuration, when enabled, will impose a great overhead
on the system. This should only be enabled when the system
is to be analyzed
-
- Say N if unsure.
+endchoice
config TRACING_BRANCHES
bool
config POWER_TRACER
bool "Trace power consumption behavior"
depends on X86
- select TRACING
+ select GENERIC_TRACER
help
This tracer helps developers to analyze and optimize the kernels
power management decisions, specifically the C-state and P-state
config HW_BRANCH_TRACER
depends on HAVE_HW_BRANCH_TRACER
bool "Trace hw branches"
- select TRACING
+ select GENERIC_TRACER
help
This tracer records all branches on the system in a circular
buffer giving access to the last N branches for each cpu.
config KMEMTRACE
bool "Trace SLAB allocations"
- select TRACING
+ select GENERIC_TRACER
help
kmemtrace provides tracing for slab allocator functions, such as
kmalloc, kfree, kmem_cache_alloc, kmem_cache_free etc.. Collected
config WORKQUEUE_TRACER
bool "Trace workqueues"
- select TRACING
+ select GENERIC_TRACER
help
The workqueue tracer provides some statistical informations
about each cpu workqueue thread such as the number of the
select RELAY
select DEBUG_FS
select TRACEPOINTS
- select TRACING
+ select GENERIC_TRACER
select STACKTRACE
help
Say Y here if you want to be able to trace the block layer actions
were made. If so, it runs stop_machine (stops all CPUS)
and modifies the code to jump over the call to ftrace.
+config FUNCTION_PROFILER
+ bool "Kernel function profiler"
+ depends on FUNCTION_TRACER
+ default n
+ help
+ This option enables the kernel function profiler. A file is created
+ in debugfs called function_profile_enabled which defaults to zero.
+ When a 1 is echoed into this file profiling begins, and when a
+ zero is entered, profiling stops. A file in the trace_stats
+ directory called functions, that show the list of functions that
+ have been hit and their counters.
+
+ If in doubt, say N
+
config FTRACE_MCOUNT_RECORD
def_bool y
depends on DYNAMIC_FTRACE
config FTRACE_STARTUP_TEST
bool "Perform a startup test on ftrace"
- depends on TRACING
+ depends on GENERIC_TRACER
select FTRACE_SELFTEST
help
This option performs a series of startup tests on ftrace. On bootup
config MMIOTRACE
bool "Memory mapped IO tracing"
depends on HAVE_MMIOTRACE_SUPPORT && PCI
- select TRACING
+ select GENERIC_TRACER
help
Mmiotrace traces Memory Mapped I/O access and is meant for
debugging and reverse engineering. It is called from the ioremap
Say N, unless you absolutely know what you are doing.
-endmenu
+config RING_BUFFER_BENCHMARK
+ tristate "Ring buffer benchmark stress tester"
+ depends on RING_BUFFER
+ help
+ This option creates a test to stress the ring buffer and bench mark it.
+ It creates its own ring buffer such that it will not interfer with
+ any other users of the ring buffer (such as ftrace). It then creates
+ a producer and consumer that will run for 10 seconds and sleep for
+ 10 seconds. Each interval it will print out the number of events
+ it recorded and give a rough estimate of how long each iteration took.
+
+ It does not disable interrupts or raise its priority, so it may be
+ affected by processes that are running.
+
+ If unsure, say N
+
+endif # FTRACE
endif # TRACING_SUPPORT
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
endif
+#
+# Make the trace clocks available generally: it's infrastructure
+# relied on by ptrace for example:
+#
+obj-y += trace_clock.o
+
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
obj-$(CONFIG_RING_BUFFER) += ring_buffer.o
+obj-$(CONFIG_RING_BUFFER_BENCHMARK) += ring_buffer_benchmark.o
obj-$(CONFIG_TRACING) += trace.o
-obj-$(CONFIG_TRACING) += trace_clock.o
obj-$(CONFIG_TRACING) += trace_output.o
obj-$(CONFIG_TRACING) += trace_stat.o
obj-$(CONFIG_TRACING) += trace_printk.o
obj-$(CONFIG_POWER_TRACER) += trace_power.o
obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
-obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
-obj-$(CONFIG_EVENT_TRACER) += trace_events.o
-obj-$(CONFIG_EVENT_TRACER) += events.o
-obj-$(CONFIG_EVENT_TRACER) += trace_export.o
+obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
+ifeq ($(CONFIG_BLOCK),y)
+obj-$(CONFIG_EVENT_TRACING) += blktrace.o
+endif
+obj-$(CONFIG_EVENT_TRACING) += trace_events.o
+obj-$(CONFIG_EVENT_TRACING) += trace_export.o
obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
obj-$(CONFIG_EVENT_PROFILE) += trace_event_profile.o
-obj-$(CONFIG_EVENT_TRACER) += trace_events_filter.o
+obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
libftrace-y := ftrace.o
#include <linux/mutex.h>
#include <linux/debugfs.h>
#include <linux/time.h>
-#include <trace/block.h>
#include <linux/uaccess.h>
+
+#include <trace/events/block.h>
+
#include "trace_output.h"
+#ifdef CONFIG_BLK_DEV_IO_TRACE
+
static unsigned int blktrace_seq __read_mostly = 1;
static struct trace_array *blk_tr;
{
if (((bt->act_mask << BLK_TC_SHIFT) & what) == 0)
return 1;
- if (sector < bt->start_lba || sector > bt->end_lba)
+ if (sector && (sector < bt->start_lba || sector > bt->end_lba))
return 1;
if (bt->pid && pid != bt->pid)
return 1;
what |= MASK_TC_BIT(rw, DISCARD);
pid = tsk->pid;
- if (unlikely(act_log_check(bt, what, sector, pid)))
+ if (act_log_check(bt, what, sector, pid))
return;
cpu = raw_smp_processor_id();
{
debugfs_remove(bt->msg_file);
debugfs_remove(bt->dropped_file);
+ debugfs_remove(bt->dir);
relay_close(bt->rchan);
free_percpu(bt->sequence);
free_percpu(bt->msg_data);
.remove_buf_file = blk_remove_buf_file_callback,
};
+static void blk_trace_setup_lba(struct blk_trace *bt,
+ struct block_device *bdev)
+{
+ struct hd_struct *part = NULL;
+
+ if (bdev)
+ part = bdev->bd_part;
+
+ if (part) {
+ bt->start_lba = part->start_sect;
+ bt->end_lba = part->start_sect + part->nr_sects;
+ } else {
+ bt->start_lba = 0;
+ bt->end_lba = -1ULL;
+ }
+}
+
/*
* Setup everything required to start tracing
*/
int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
- struct blk_user_trace_setup *buts)
+ struct block_device *bdev,
+ struct blk_user_trace_setup *buts)
{
struct blk_trace *old_bt, *bt = NULL;
struct dentry *dir = NULL;
if (!bt->act_mask)
bt->act_mask = (u16) -1;
- bt->start_lba = buts->start_lba;
- bt->end_lba = buts->end_lba;
- if (!bt->end_lba)
- bt->end_lba = -1ULL;
+ blk_trace_setup_lba(bt, bdev);
+
+ /* overwrite with user settings */
+ if (buts->start_lba)
+ bt->start_lba = buts->start_lba;
+ if (buts->end_lba)
+ bt->end_lba = buts->end_lba;
bt->pid = buts->pid;
bt->trace_state = Blktrace_setup;
}
int blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
+ struct block_device *bdev,
char __user *arg)
{
struct blk_user_trace_setup buts;
if (ret)
return -EFAULT;
- ret = do_blk_trace_setup(q, name, dev, &buts);
+ ret = do_blk_trace_setup(q, name, dev, bdev, &buts);
if (ret)
return ret;
switch (cmd) {
case BLKTRACESETUP:
bdevname(bdev, b);
- ret = blk_trace_setup(q, b, bdev->bd_dev, arg);
+ ret = blk_trace_setup(q, b, bdev->bd_dev, bdev, arg);
break;
case BLKTRACESTART:
start = 1;
* @bio: the source bio
* @dev: target device
* @from: source sector
- * @to: target sector
*
* Description:
* Device mapper or raid target sometimes need to split a bio because
*
**/
static void blk_add_trace_remap(struct request_queue *q, struct bio *bio,
- dev_t dev, sector_t from, sector_t to)
+ dev_t dev, sector_t from)
{
struct blk_trace *bt = q->blk_trace;
struct blk_io_trace_remap r;
if (likely(!bt))
return;
- r.device = cpu_to_be32(dev);
- r.device_from = cpu_to_be32(bio->bi_bdev->bd_dev);
- r.sector = cpu_to_be64(to);
+ r.device_from = cpu_to_be32(dev);
+ r.device_to = cpu_to_be32(bio->bi_bdev->bd_dev);
+ r.sector_from = cpu_to_be64(from);
- __blk_add_trace(bt, from, bio->bi_size, bio->bi_rw, BLK_TA_REMAP,
- !bio_flagged(bio, BIO_UPTODATE), sizeof(r), &r);
+ __blk_add_trace(bt, bio->bi_sector, bio->bi_size, bio->bi_rw,
+ BLK_TA_REMAP, !bio_flagged(bio, BIO_UPTODATE),
+ sizeof(r), &r);
}
/**
return te_blk_io_trace(ent) + 1;
}
+static inline u32 t_action(const struct trace_entry *ent)
+{
+ return te_blk_io_trace(ent)->action;
+}
+
+static inline u32 t_bytes(const struct trace_entry *ent)
+{
+ return te_blk_io_trace(ent)->bytes;
+}
+
static inline u32 t_sec(const struct trace_entry *ent)
{
return te_blk_io_trace(ent)->bytes >> 9;
struct blk_io_trace_remap *r)
{
const struct blk_io_trace_remap *__r = pdu_start(ent);
- __u64 sector = __r->sector;
+ __u64 sector_from = __r->sector_from;
- r->device = be32_to_cpu(__r->device);
r->device_from = be32_to_cpu(__r->device_from);
- r->sector = be64_to_cpu(sector);
+ r->device_to = be32_to_cpu(__r->device_to);
+ r->sector_from = be64_to_cpu(sector_from);
}
typedef int (blk_log_action_t) (struct trace_iterator *iter, const char *act);
MAJOR(t->device), MINOR(t->device), act, rwbs);
}
+static int blk_log_dump_pdu(struct trace_seq *s, const struct trace_entry *ent)
+{
+ const unsigned char *pdu_buf;
+ int pdu_len;
+ int i, end, ret;
+
+ pdu_buf = pdu_start(ent);
+ pdu_len = te_blk_io_trace(ent)->pdu_len;
+
+ if (!pdu_len)
+ return 1;
+
+ /* find the last zero that needs to be printed */
+ for (end = pdu_len - 1; end >= 0; end--)
+ if (pdu_buf[end])
+ break;
+ end++;
+
+ if (!trace_seq_putc(s, '('))
+ return 0;
+
+ for (i = 0; i < pdu_len; i++) {
+
+ ret = trace_seq_printf(s, "%s%02x",
+ i == 0 ? "" : " ", pdu_buf[i]);
+ if (!ret)
+ return ret;
+
+ /*
+ * stop when the rest is just zeroes and indicate so
+ * with a ".." appended
+ */
+ if (i == end && end != pdu_len - 1)
+ return trace_seq_puts(s, " ..) ");
+ }
+
+ return trace_seq_puts(s, ") ");
+}
+
static int blk_log_generic(struct trace_seq *s, const struct trace_entry *ent)
{
char cmd[TASK_COMM_LEN];
trace_find_cmdline(ent->pid, cmd);
- if (t_sec(ent))
- return trace_seq_printf(s, "%llu + %u [%s]\n",
- t_sector(ent), t_sec(ent), cmd);
- return trace_seq_printf(s, "[%s]\n", cmd);
+ if (t_action(ent) & BLK_TC_ACT(BLK_TC_PC)) {
+ int ret;
+
+ ret = trace_seq_printf(s, "%u ", t_bytes(ent));
+ if (!ret)
+ return 0;
+ ret = blk_log_dump_pdu(s, ent);
+ if (!ret)
+ return 0;
+ return trace_seq_printf(s, "[%s]\n", cmd);
+ } else {
+ if (t_sec(ent))
+ return trace_seq_printf(s, "%llu + %u [%s]\n",
+ t_sector(ent), t_sec(ent), cmd);
+ return trace_seq_printf(s, "[%s]\n", cmd);
+ }
}
static int blk_log_with_error(struct trace_seq *s,
const struct trace_entry *ent)
{
- if (t_sec(ent))
- return trace_seq_printf(s, "%llu + %u [%d]\n", t_sector(ent),
- t_sec(ent), t_error(ent));
- return trace_seq_printf(s, "%llu [%d]\n", t_sector(ent), t_error(ent));
+ if (t_action(ent) & BLK_TC_ACT(BLK_TC_PC)) {
+ int ret;
+
+ ret = blk_log_dump_pdu(s, ent);
+ if (ret)
+ return trace_seq_printf(s, "[%d]\n", t_error(ent));
+ return 0;
+ } else {
+ if (t_sec(ent))
+ return trace_seq_printf(s, "%llu + %u [%d]\n",
+ t_sector(ent),
+ t_sec(ent), t_error(ent));
+ return trace_seq_printf(s, "%llu [%d]\n",
+ t_sector(ent), t_error(ent));
+ }
}
static int blk_log_remap(struct trace_seq *s, const struct trace_entry *ent)
{
- struct blk_io_trace_remap r = { .device = 0, };
+ struct blk_io_trace_remap r = { .device_from = 0, };
get_pdu_remap(ent, &r);
return trace_seq_printf(s, "%llu + %u <- (%d,%d) %llu\n",
- t_sector(ent),
- t_sec(ent), MAJOR(r.device), MINOR(r.device),
- (unsigned long long)r.sector);
+ t_sector(ent), t_sec(ent),
+ MAJOR(r.device_from), MINOR(r.device_from),
+ (unsigned long long)r.sector_from);
}
static int blk_log_plug(struct trace_seq *s, const struct trace_entry *ent)
static void blk_tracer_start(struct trace_array *tr)
{
blk_tracer_enabled = true;
- trace_flags &= ~TRACE_ITER_CONTEXT_INFO;
}
static int blk_tracer_init(struct trace_array *tr)
static void blk_tracer_stop(struct trace_array *tr)
{
blk_tracer_enabled = false;
- trace_flags |= TRACE_ITER_CONTEXT_INFO;
}
static void blk_tracer_reset(struct trace_array *tr)
}
if (unlikely(what == 0 || what >= ARRAY_SIZE(what2act)))
- ret = trace_seq_printf(s, "Bad pc action %x\n", what);
+ ret = trace_seq_printf(s, "Unknown action %x\n", what);
else {
ret = log_action(iter, what2act[what].act[long_act]);
if (ret)
static enum print_line_t blk_trace_event_print(struct trace_iterator *iter,
int flags)
{
- if (!trace_print_context(iter))
- return TRACE_TYPE_PARTIAL_LINE;
-
return print_one_line(iter, false);
}
return print_one_line(iter, true);
}
+static int blk_tracer_set_flag(u32 old_flags, u32 bit, int set)
+{
+ /* don't output context-info for blk_classic output */
+ if (bit == TRACE_BLK_OPT_CLASSIC) {
+ if (set)
+ trace_flags &= ~TRACE_ITER_CONTEXT_INFO;
+ else
+ trace_flags |= TRACE_ITER_CONTEXT_INFO;
+ }
+ return 0;
+}
+
static struct tracer blk_tracer __read_mostly = {
.name = "blk",
.init = blk_tracer_init,
.print_header = blk_tracer_print_header,
.print_line = blk_tracer_print_line,
.flags = &blk_tracer_flags,
+ .set_flag = blk_tracer_set_flag,
};
static struct trace_event trace_blk_event = {
/*
* Setup everything required to start tracing
*/
-static int blk_trace_setup_queue(struct request_queue *q, dev_t dev)
+static int blk_trace_setup_queue(struct request_queue *q,
+ struct block_device *bdev)
{
struct blk_trace *old_bt, *bt = NULL;
int ret = -ENOMEM;
if (!bt->msg_data)
goto free_bt;
- bt->dev = dev;
+ bt->dev = bdev->bd_dev;
bt->act_mask = (u16)-1;
- bt->end_lba = -1ULL;
+
+ blk_trace_setup_lba(bt, bdev);
old_bt = xchg(&q->blk_trace, bt);
if (old_bt != NULL) {
if (attr == &dev_attr_enable) {
if (value)
- ret = blk_trace_setup_queue(q, bdev->bd_dev);
+ ret = blk_trace_setup_queue(q, bdev);
else
ret = blk_trace_remove_queue(q);
goto out_unlock_bdev;
ret = 0;
if (q->blk_trace == NULL)
- ret = blk_trace_setup_queue(q, bdev->bd_dev);
+ ret = blk_trace_setup_queue(q, bdev);
if (ret == 0) {
if (attr == &dev_attr_act_mask)
return ret ? ret : count;
}
+int blk_trace_init_sysfs(struct device *dev)
+{
+ return sysfs_create_group(&dev->kobj, &blk_trace_attr_group);
+}
+
+#endif /* CONFIG_BLK_DEV_IO_TRACE */
+
+#ifdef CONFIG_EVENT_TRACING
+
+void blk_dump_cmd(char *buf, struct request *rq)
+{
+ int i, end;
+ int len = rq->cmd_len;
+ unsigned char *cmd = rq->cmd;
+
+ if (!blk_pc_request(rq)) {
+ buf[0] = '\0';
+ return;
+ }
+
+ for (end = len - 1; end >= 0; end--)
+ if (cmd[end])
+ break;
+ end++;
+
+ for (i = 0; i < len; i++) {
+ buf += sprintf(buf, "%s%02x", i == 0 ? "" : " ", cmd[i]);
+ if (i == end && end != len - 1) {
+ sprintf(buf, " ..");
+ break;
+ }
+ }
+}
+
+void blk_fill_rwbs(char *rwbs, u32 rw, int bytes)
+{
+ int i = 0;
+
+ if (rw & WRITE)
+ rwbs[i++] = 'W';
+ else if (rw & 1 << BIO_RW_DISCARD)
+ rwbs[i++] = 'D';
+ else if (bytes)
+ rwbs[i++] = 'R';
+ else
+ rwbs[i++] = 'N';
+
+ if (rw & 1 << BIO_RW_AHEAD)
+ rwbs[i++] = 'A';
+ if (rw & 1 << BIO_RW_BARRIER)
+ rwbs[i++] = 'B';
+ if (rw & 1 << BIO_RW_SYNCIO)
+ rwbs[i++] = 'S';
+ if (rw & 1 << BIO_RW_META)
+ rwbs[i++] = 'M';
+
+ rwbs[i] = '\0';
+}
+
+void blk_fill_rwbs_rq(char *rwbs, struct request *rq)
+{
+ int rw = rq->cmd_flags & 0x03;
+ int bytes;
+
+ if (blk_discard_rq(rq))
+ rw |= (1 << BIO_RW_DISCARD);
+
+ if (blk_pc_request(rq))
+ bytes = rq->data_len;
+ else
+ bytes = rq->hard_nr_sectors << 9;
+
+ blk_fill_rwbs(rwbs, rw, bytes);
+}
+
+#endif /* CONFIG_EVENT_TRACING */
+
+++ /dev/null
-/*
- * This is the place to register all trace points as events.
- */
-
-#include <linux/stringify.h>
-
-#include <trace/trace_events.h>
-
-#include "trace_output.h"
-
-#include "trace_events_stage_1.h"
-#include "trace_events_stage_2.h"
-#include "trace_events_stage_3.h"
-
#include <linux/list.h>
#include <linux/hash.h>
-#include <trace/sched.h>
+#include <trace/events/sched.h>
#include <asm/ftrace.h>
+#include <asm/setup.h>
-#include "trace.h"
+#include "trace_output.h"
+#include "trace_stat.h"
#define FTRACE_WARN_ON(cond) \
do { \
static struct ftrace_ops ftrace_list_end __read_mostly =
{
- .func = ftrace_stub,
+ .func = ftrace_stub,
};
static struct ftrace_ops *ftrace_list __read_mostly = &ftrace_list_end;
#endif
}
+#ifdef CONFIG_FUNCTION_PROFILER
+struct ftrace_profile {
+ struct hlist_node node;
+ unsigned long ip;
+ unsigned long counter;
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ unsigned long long time;
+#endif
+};
+
+struct ftrace_profile_page {
+ struct ftrace_profile_page *next;
+ unsigned long index;
+ struct ftrace_profile records[];
+};
+
+struct ftrace_profile_stat {
+ atomic_t disabled;
+ struct hlist_head *hash;
+ struct ftrace_profile_page *pages;
+ struct ftrace_profile_page *start;
+ struct tracer_stat stat;
+};
+
+#define PROFILE_RECORDS_SIZE \
+ (PAGE_SIZE - offsetof(struct ftrace_profile_page, records))
+
+#define PROFILES_PER_PAGE \
+ (PROFILE_RECORDS_SIZE / sizeof(struct ftrace_profile))
+
+static int ftrace_profile_bits __read_mostly;
+static int ftrace_profile_enabled __read_mostly;
+
+/* ftrace_profile_lock - synchronize the enable and disable of the profiler */
+static DEFINE_MUTEX(ftrace_profile_lock);
+
+static DEFINE_PER_CPU(struct ftrace_profile_stat, ftrace_profile_stats);
+
+#define FTRACE_PROFILE_HASH_SIZE 1024 /* must be power of 2 */
+
+static void *
+function_stat_next(void *v, int idx)
+{
+ struct ftrace_profile *rec = v;
+ struct ftrace_profile_page *pg;
+
+ pg = (struct ftrace_profile_page *)((unsigned long)rec & PAGE_MASK);
+
+ again:
+ rec++;
+ if ((void *)rec >= (void *)&pg->records[pg->index]) {
+ pg = pg->next;
+ if (!pg)
+ return NULL;
+ rec = &pg->records[0];
+ if (!rec->counter)
+ goto again;
+ }
+
+ return rec;
+}
+
+static void *function_stat_start(struct tracer_stat *trace)
+{
+ struct ftrace_profile_stat *stat =
+ container_of(trace, struct ftrace_profile_stat, stat);
+
+ if (!stat || !stat->start)
+ return NULL;
+
+ return function_stat_next(&stat->start->records[0], 0);
+}
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+/* function graph compares on total time */
+static int function_stat_cmp(void *p1, void *p2)
+{
+ struct ftrace_profile *a = p1;
+ struct ftrace_profile *b = p2;
+
+ if (a->time < b->time)
+ return -1;
+ if (a->time > b->time)
+ return 1;
+ else
+ return 0;
+}
+#else
+/* not function graph compares against hits */
+static int function_stat_cmp(void *p1, void *p2)
+{
+ struct ftrace_profile *a = p1;
+ struct ftrace_profile *b = p2;
+
+ if (a->counter < b->counter)
+ return -1;
+ if (a->counter > b->counter)
+ return 1;
+ else
+ return 0;
+}
+#endif
+
+static int function_stat_headers(struct seq_file *m)
+{
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ seq_printf(m, " Function "
+ "Hit Time Avg\n"
+ " -------- "
+ "--- ---- ---\n");
+#else
+ seq_printf(m, " Function Hit\n"
+ " -------- ---\n");
+#endif
+ return 0;
+}
+
+static int function_stat_show(struct seq_file *m, void *v)
+{
+ struct ftrace_profile *rec = v;
+ char str[KSYM_SYMBOL_LEN];
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ static DEFINE_MUTEX(mutex);
+ static struct trace_seq s;
+ unsigned long long avg;
+#endif
+
+ kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
+ seq_printf(m, " %-30.30s %10lu", str, rec->counter);
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ seq_printf(m, " ");
+ avg = rec->time;
+ do_div(avg, rec->counter);
+
+ mutex_lock(&mutex);
+ trace_seq_init(&s);
+ trace_print_graph_duration(rec->time, &s);
+ trace_seq_puts(&s, " ");
+ trace_print_graph_duration(avg, &s);
+ trace_print_seq(m, &s);
+ mutex_unlock(&mutex);
+#endif
+ seq_putc(m, '\n');
+
+ return 0;
+}
+
+static void ftrace_profile_reset(struct ftrace_profile_stat *stat)
+{
+ struct ftrace_profile_page *pg;
+
+ pg = stat->pages = stat->start;
+
+ while (pg) {
+ memset(pg->records, 0, PROFILE_RECORDS_SIZE);
+ pg->index = 0;
+ pg = pg->next;
+ }
+
+ memset(stat->hash, 0,
+ FTRACE_PROFILE_HASH_SIZE * sizeof(struct hlist_head));
+}
+
+int ftrace_profile_pages_init(struct ftrace_profile_stat *stat)
+{
+ struct ftrace_profile_page *pg;
+ int functions;
+ int pages;
+ int i;
+
+ /* If we already allocated, do nothing */
+ if (stat->pages)
+ return 0;
+
+ stat->pages = (void *)get_zeroed_page(GFP_KERNEL);
+ if (!stat->pages)
+ return -ENOMEM;
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+ functions = ftrace_update_tot_cnt;
+#else
+ /*
+ * We do not know the number of functions that exist because
+ * dynamic tracing is what counts them. With past experience
+ * we have around 20K functions. That should be more than enough.
+ * It is highly unlikely we will execute every function in
+ * the kernel.
+ */
+ functions = 20000;
+#endif
+
+ pg = stat->start = stat->pages;
+
+ pages = DIV_ROUND_UP(functions, PROFILES_PER_PAGE);
+
+ for (i = 0; i < pages; i++) {
+ pg->next = (void *)get_zeroed_page(GFP_KERNEL);
+ if (!pg->next)
+ goto out_free;
+ pg = pg->next;
+ }
+
+ return 0;
+
+ out_free:
+ pg = stat->start;
+ while (pg) {
+ unsigned long tmp = (unsigned long)pg;
+
+ pg = pg->next;
+ free_page(tmp);
+ }
+
+ free_page((unsigned long)stat->pages);
+ stat->pages = NULL;
+ stat->start = NULL;
+
+ return -ENOMEM;
+}
+
+static int ftrace_profile_init_cpu(int cpu)
+{
+ struct ftrace_profile_stat *stat;
+ int size;
+
+ stat = &per_cpu(ftrace_profile_stats, cpu);
+
+ if (stat->hash) {
+ /* If the profile is already created, simply reset it */
+ ftrace_profile_reset(stat);
+ return 0;
+ }
+
+ /*
+ * We are profiling all functions, but usually only a few thousand
+ * functions are hit. We'll make a hash of 1024 items.
+ */
+ size = FTRACE_PROFILE_HASH_SIZE;
+
+ stat->hash = kzalloc(sizeof(struct hlist_head) * size, GFP_KERNEL);
+
+ if (!stat->hash)
+ return -ENOMEM;
+
+ if (!ftrace_profile_bits) {
+ size--;
+
+ for (; size; size >>= 1)
+ ftrace_profile_bits++;
+ }
+
+ /* Preallocate the function profiling pages */
+ if (ftrace_profile_pages_init(stat) < 0) {
+ kfree(stat->hash);
+ stat->hash = NULL;
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int ftrace_profile_init(void)
+{
+ int cpu;
+ int ret = 0;
+
+ for_each_online_cpu(cpu) {
+ ret = ftrace_profile_init_cpu(cpu);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+/* interrupts must be disabled */
+static struct ftrace_profile *
+ftrace_find_profiled_func(struct ftrace_profile_stat *stat, unsigned long ip)
+{
+ struct ftrace_profile *rec;
+ struct hlist_head *hhd;
+ struct hlist_node *n;
+ unsigned long key;
+
+ key = hash_long(ip, ftrace_profile_bits);
+ hhd = &stat->hash[key];
+
+ if (hlist_empty(hhd))
+ return NULL;
+
+ hlist_for_each_entry_rcu(rec, n, hhd, node) {
+ if (rec->ip == ip)
+ return rec;
+ }
+
+ return NULL;
+}
+
+static void ftrace_add_profile(struct ftrace_profile_stat *stat,
+ struct ftrace_profile *rec)
+{
+ unsigned long key;
+
+ key = hash_long(rec->ip, ftrace_profile_bits);
+ hlist_add_head_rcu(&rec->node, &stat->hash[key]);
+}
+
+/*
+ * The memory is already allocated, this simply finds a new record to use.
+ */
+static struct ftrace_profile *
+ftrace_profile_alloc(struct ftrace_profile_stat *stat, unsigned long ip)
+{
+ struct ftrace_profile *rec = NULL;
+
+ /* prevent recursion (from NMIs) */
+ if (atomic_inc_return(&stat->disabled) != 1)
+ goto out;
+
+ /*
+ * Try to find the function again since an NMI
+ * could have added it
+ */
+ rec = ftrace_find_profiled_func(stat, ip);
+ if (rec)
+ goto out;
+
+ if (stat->pages->index == PROFILES_PER_PAGE) {
+ if (!stat->pages->next)
+ goto out;
+ stat->pages = stat->pages->next;
+ }
+
+ rec = &stat->pages->records[stat->pages->index++];
+ rec->ip = ip;
+ ftrace_add_profile(stat, rec);
+
+ out:
+ atomic_dec(&stat->disabled);
+
+ return rec;
+}
+
+static void
+function_profile_call(unsigned long ip, unsigned long parent_ip)
+{
+ struct ftrace_profile_stat *stat;
+ struct ftrace_profile *rec;
+ unsigned long flags;
+
+ if (!ftrace_profile_enabled)
+ return;
+
+ local_irq_save(flags);
+
+ stat = &__get_cpu_var(ftrace_profile_stats);
+ if (!stat->hash || !ftrace_profile_enabled)
+ goto out;
+
+ rec = ftrace_find_profiled_func(stat, ip);
+ if (!rec) {
+ rec = ftrace_profile_alloc(stat, ip);
+ if (!rec)
+ goto out;
+ }
+
+ rec->counter++;
+ out:
+ local_irq_restore(flags);
+}
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+static int profile_graph_entry(struct ftrace_graph_ent *trace)
+{
+ function_profile_call(trace->func, 0);
+ return 1;
+}
+
+static void profile_graph_return(struct ftrace_graph_ret *trace)
+{
+ struct ftrace_profile_stat *stat;
+ unsigned long long calltime;
+ struct ftrace_profile *rec;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ stat = &__get_cpu_var(ftrace_profile_stats);
+ if (!stat->hash || !ftrace_profile_enabled)
+ goto out;
+
+ calltime = trace->rettime - trace->calltime;
+
+ if (!(trace_flags & TRACE_ITER_GRAPH_TIME)) {
+ int index;
+
+ index = trace->depth;
+
+ /* Append this call time to the parent time to subtract */
+ if (index)
+ current->ret_stack[index - 1].subtime += calltime;
+
+ if (current->ret_stack[index].subtime < calltime)
+ calltime -= current->ret_stack[index].subtime;
+ else
+ calltime = 0;
+ }
+
+ rec = ftrace_find_profiled_func(stat, trace->func);
+ if (rec)
+ rec->time += calltime;
+
+ out:
+ local_irq_restore(flags);
+}
+
+static int register_ftrace_profiler(void)
+{
+ return register_ftrace_graph(&profile_graph_return,
+ &profile_graph_entry);
+}
+
+static void unregister_ftrace_profiler(void)
+{
+ unregister_ftrace_graph();
+}
+#else
+static struct ftrace_ops ftrace_profile_ops __read_mostly =
+{
+ .func = function_profile_call,
+};
+
+static int register_ftrace_profiler(void)
+{
+ return register_ftrace_function(&ftrace_profile_ops);
+}
+
+static void unregister_ftrace_profiler(void)
+{
+ unregister_ftrace_function(&ftrace_profile_ops);
+}
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+static ssize_t
+ftrace_profile_write(struct file *filp, const char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ unsigned long val;
+ char buf[64]; /* big enough to hold a number */
+ int ret;
+
+ if (cnt >= sizeof(buf))
+ return -EINVAL;
+
+ if (copy_from_user(&buf, ubuf, cnt))
+ return -EFAULT;
+
+ buf[cnt] = 0;
+
+ ret = strict_strtoul(buf, 10, &val);
+ if (ret < 0)
+ return ret;
+
+ val = !!val;
+
+ mutex_lock(&ftrace_profile_lock);
+ if (ftrace_profile_enabled ^ val) {
+ if (val) {
+ ret = ftrace_profile_init();
+ if (ret < 0) {
+ cnt = ret;
+ goto out;
+ }
+
+ ret = register_ftrace_profiler();
+ if (ret < 0) {
+ cnt = ret;
+ goto out;
+ }
+ ftrace_profile_enabled = 1;
+ } else {
+ ftrace_profile_enabled = 0;
+ /*
+ * unregister_ftrace_profiler calls stop_machine
+ * so this acts like an synchronize_sched.
+ */
+ unregister_ftrace_profiler();
+ }
+ }
+ out:
+ mutex_unlock(&ftrace_profile_lock);
+
+ filp->f_pos += cnt;
+
+ return cnt;
+}
+
+static ssize_t
+ftrace_profile_read(struct file *filp, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ char buf[64]; /* big enough to hold a number */
+ int r;
+
+ r = sprintf(buf, "%u\n", ftrace_profile_enabled);
+ return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
+}
+
+static const struct file_operations ftrace_profile_fops = {
+ .open = tracing_open_generic,
+ .read = ftrace_profile_read,
+ .write = ftrace_profile_write,
+};
+
+/* used to initialize the real stat files */
+static struct tracer_stat function_stats __initdata = {
+ .name = "functions",
+ .stat_start = function_stat_start,
+ .stat_next = function_stat_next,
+ .stat_cmp = function_stat_cmp,
+ .stat_headers = function_stat_headers,
+ .stat_show = function_stat_show
+};
+
+static void ftrace_profile_debugfs(struct dentry *d_tracer)
+{
+ struct ftrace_profile_stat *stat;
+ struct dentry *entry;
+ char *name;
+ int ret;
+ int cpu;
+
+ for_each_possible_cpu(cpu) {
+ stat = &per_cpu(ftrace_profile_stats, cpu);
+
+ /* allocate enough for function name + cpu number */
+ name = kmalloc(32, GFP_KERNEL);
+ if (!name) {
+ /*
+ * The files created are permanent, if something happens
+ * we still do not free memory.
+ */
+ kfree(stat);
+ WARN(1,
+ "Could not allocate stat file for cpu %d\n",
+ cpu);
+ return;
+ }
+ stat->stat = function_stats;
+ snprintf(name, 32, "function%d", cpu);
+ stat->stat.name = name;
+ ret = register_stat_tracer(&stat->stat);
+ if (ret) {
+ WARN(1,
+ "Could not register function stat for cpu %d\n",
+ cpu);
+ kfree(name);
+ return;
+ }
+ }
+
+ entry = debugfs_create_file("function_profile_enabled", 0644,
+ d_tracer, NULL, &ftrace_profile_fops);
+ if (!entry)
+ pr_warning("Could not create debugfs "
+ "'function_profile_enabled' entry\n");
+}
+
+#else /* CONFIG_FUNCTION_PROFILER */
+static void ftrace_profile_debugfs(struct dentry *d_tracer)
+{
+}
+#endif /* CONFIG_FUNCTION_PROFILER */
+
/* set when tracing only a pid */
struct pid *ftrace_pid_trace;
static struct pid * const ftrace_swapper_pid = &init_struct_pid;
struct rcu_head rcu;
};
-
enum {
FTRACE_ENABLE_CALLS = (1 << 0),
FTRACE_DISABLE_CALLS = (1 << 1),
rec->flags |= FTRACE_FL_FREE;
}
-void ftrace_release(void *start, unsigned long size)
-{
- struct dyn_ftrace *rec;
- struct ftrace_page *pg;
- unsigned long s = (unsigned long)start;
- unsigned long e = s + size;
-
- if (ftrace_disabled || !start)
- return;
-
- mutex_lock(&ftrace_lock);
- do_for_each_ftrace_rec(pg, rec) {
- if ((rec->ip >= s) && (rec->ip < e)) {
- /*
- * rec->ip is changed in ftrace_free_rec()
- * It should not between s and e if record was freed.
- */
- FTRACE_WARN_ON(rec->flags & FTRACE_FL_FREE);
- ftrace_free_rec(rec);
- }
- } while_for_each_ftrace_rec();
- mutex_unlock(&ftrace_lock);
-}
-
static struct dyn_ftrace *ftrace_alloc_dyn_node(unsigned long ip)
{
struct dyn_ftrace *rec;
static struct ftrace_ops trace_probe_ops __read_mostly =
{
- .func = function_trace_probe_call,
+ .func = function_trace_probe_call,
};
static int ftrace_probe_registered;
ftrace_set_regex(buf, len, reset, 0);
}
+/*
+ * command line interface to allow users to set filters on boot up.
+ */
+#define FTRACE_FILTER_SIZE COMMAND_LINE_SIZE
+static char ftrace_notrace_buf[FTRACE_FILTER_SIZE] __initdata;
+static char ftrace_filter_buf[FTRACE_FILTER_SIZE] __initdata;
+
+static int __init set_ftrace_notrace(char *str)
+{
+ strncpy(ftrace_notrace_buf, str, FTRACE_FILTER_SIZE);
+ return 1;
+}
+__setup("ftrace_notrace=", set_ftrace_notrace);
+
+static int __init set_ftrace_filter(char *str)
+{
+ strncpy(ftrace_filter_buf, str, FTRACE_FILTER_SIZE);
+ return 1;
+}
+__setup("ftrace_filter=", set_ftrace_filter);
+
+static void __init set_ftrace_early_filter(char *buf, int enable)
+{
+ char *func;
+
+ while (buf) {
+ func = strsep(&buf, ",");
+ ftrace_set_regex(func, strlen(func), 0, enable);
+ }
+}
+
+static void __init set_ftrace_early_filters(void)
+{
+ if (ftrace_filter_buf[0])
+ set_ftrace_early_filter(ftrace_filter_buf, 1);
+ if (ftrace_notrace_buf[0])
+ set_ftrace_early_filter(ftrace_notrace_buf, 0);
+}
+
static int
ftrace_regex_release(struct inode *inode, struct file *file, int enable)
{
static __init int ftrace_init_dyn_debugfs(struct dentry *d_tracer)
{
- struct dentry *entry;
- entry = debugfs_create_file("available_filter_functions", 0444,
- d_tracer, NULL, &ftrace_avail_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'available_filter_functions' entry\n");
+ trace_create_file("available_filter_functions", 0444,
+ d_tracer, NULL, &ftrace_avail_fops);
- entry = debugfs_create_file("failures", 0444,
- d_tracer, NULL, &ftrace_failures_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'failures' entry\n");
+ trace_create_file("failures", 0444,
+ d_tracer, NULL, &ftrace_failures_fops);
- entry = debugfs_create_file("set_ftrace_filter", 0644, d_tracer,
- NULL, &ftrace_filter_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'set_ftrace_filter' entry\n");
+ trace_create_file("set_ftrace_filter", 0644, d_tracer,
+ NULL, &ftrace_filter_fops);
- entry = debugfs_create_file("set_ftrace_notrace", 0644, d_tracer,
+ trace_create_file("set_ftrace_notrace", 0644, d_tracer,
NULL, &ftrace_notrace_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'set_ftrace_notrace' entry\n");
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
- entry = debugfs_create_file("set_graph_function", 0444, d_tracer,
+ trace_create_file("set_graph_function", 0444, d_tracer,
NULL,
&ftrace_graph_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'set_graph_function' entry\n");
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
return 0;
return 0;
}
-void ftrace_init_module(struct module *mod,
- unsigned long *start, unsigned long *end)
+#ifdef CONFIG_MODULES
+void ftrace_release(void *start, void *end)
+{
+ struct dyn_ftrace *rec;
+ struct ftrace_page *pg;
+ unsigned long s = (unsigned long)start;
+ unsigned long e = (unsigned long)end;
+
+ if (ftrace_disabled || !start || start == end)
+ return;
+
+ mutex_lock(&ftrace_lock);
+ do_for_each_ftrace_rec(pg, rec) {
+ if ((rec->ip >= s) && (rec->ip < e)) {
+ /*
+ * rec->ip is changed in ftrace_free_rec()
+ * It should not between s and e if record was freed.
+ */
+ FTRACE_WARN_ON(rec->flags & FTRACE_FL_FREE);
+ ftrace_free_rec(rec);
+ }
+ } while_for_each_ftrace_rec();
+ mutex_unlock(&ftrace_lock);
+}
+
+static void ftrace_init_module(struct module *mod,
+ unsigned long *start, unsigned long *end)
{
if (ftrace_disabled || start == end)
return;
ftrace_convert_nops(mod, start, end);
}
+static int ftrace_module_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ struct module *mod = data;
+
+ switch (val) {
+ case MODULE_STATE_COMING:
+ ftrace_init_module(mod, mod->ftrace_callsites,
+ mod->ftrace_callsites +
+ mod->num_ftrace_callsites);
+ break;
+ case MODULE_STATE_GOING:
+ ftrace_release(mod->ftrace_callsites,
+ mod->ftrace_callsites +
+ mod->num_ftrace_callsites);
+ break;
+ }
+
+ return 0;
+}
+#else
+static int ftrace_module_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ return 0;
+}
+#endif /* CONFIG_MODULES */
+
+struct notifier_block ftrace_module_nb = {
+ .notifier_call = ftrace_module_notify,
+ .priority = 0,
+};
+
extern unsigned long __start_mcount_loc[];
extern unsigned long __stop_mcount_loc[];
__start_mcount_loc,
__stop_mcount_loc);
+ ret = register_module_notifier(&ftrace_module_nb);
+ if (ret)
+ pr_warning("Failed to register trace ftrace module notifier\n");
+
+ set_ftrace_early_filters();
+
return;
failed:
ftrace_disabled = 1;
static __init int ftrace_init_debugfs(void)
{
struct dentry *d_tracer;
- struct dentry *entry;
d_tracer = tracing_init_dentry();
if (!d_tracer)
ftrace_init_dyn_debugfs(d_tracer);
- entry = debugfs_create_file("set_ftrace_pid", 0644, d_tracer,
- NULL, &ftrace_pid_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'set_ftrace_pid' entry\n");
+ trace_create_file("set_ftrace_pid", 0644, d_tracer,
+ NULL, &ftrace_pid_fops);
+
+ ftrace_profile_debugfs(d_tracer);
+
return 0;
}
fs_initcall(ftrace_init_debugfs);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-static atomic_t ftrace_graph_active;
+static int ftrace_graph_active;
static struct notifier_block ftrace_suspend_notifier;
int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace)
}
if (t->ret_stack == NULL) {
- t->curr_ret_stack = -1;
- /* Make sure IRQs see the -1 first: */
- barrier();
- t->ret_stack = ret_stack_list[start++];
atomic_set(&t->tracing_graph_pause, 0);
atomic_set(&t->trace_overrun, 0);
+ t->curr_ret_stack = -1;
+ /* Make sure the tasks see the -1 first: */
+ smp_wmb();
+ t->ret_stack = ret_stack_list[start++];
}
} while_each_thread(g, t);
return -ENOMEM;
/* The cpu_boot init_task->ret_stack will never be freed */
- for_each_online_cpu(cpu)
- ftrace_graph_init_task(idle_task(cpu));
+ for_each_online_cpu(cpu) {
+ if (!idle_task(cpu)->ret_stack)
+ ftrace_graph_init_task(idle_task(cpu));
+ }
do {
ret = alloc_retstack_tasklist(ret_stack_list);
mutex_lock(&ftrace_lock);
/* we currently allow only one tracer registered at a time */
- if (atomic_read(&ftrace_graph_active)) {
+ if (ftrace_graph_active) {
ret = -EBUSY;
goto out;
}
ftrace_suspend_notifier.notifier_call = ftrace_suspend_notifier_call;
register_pm_notifier(&ftrace_suspend_notifier);
- atomic_inc(&ftrace_graph_active);
+ ftrace_graph_active++;
ret = start_graph_tracing();
if (ret) {
- atomic_dec(&ftrace_graph_active);
+ ftrace_graph_active--;
goto out;
}
{
mutex_lock(&ftrace_lock);
- if (!unlikely(atomic_read(&ftrace_graph_active)))
+ if (unlikely(!ftrace_graph_active))
goto out;
- atomic_dec(&ftrace_graph_active);
+ ftrace_graph_active--;
unregister_trace_sched_switch(ftrace_graph_probe_sched_switch);
ftrace_graph_return = (trace_func_graph_ret_t)ftrace_stub;
ftrace_graph_entry = ftrace_graph_entry_stub;
/* Allocate a return stack for newly created task */
void ftrace_graph_init_task(struct task_struct *t)
{
- if (atomic_read(&ftrace_graph_active)) {
- t->ret_stack = kmalloc(FTRACE_RETFUNC_DEPTH
+ /* Make sure we do not use the parent ret_stack */
+ t->ret_stack = NULL;
+
+ if (ftrace_graph_active) {
+ struct ftrace_ret_stack *ret_stack;
+
+ ret_stack = kmalloc(FTRACE_RETFUNC_DEPTH
* sizeof(struct ftrace_ret_stack),
GFP_KERNEL);
- if (!t->ret_stack)
+ if (!ret_stack)
return;
t->curr_ret_stack = -1;
atomic_set(&t->tracing_graph_pause, 0);
atomic_set(&t->trace_overrun, 0);
t->ftrace_timestamp = 0;
- } else
- t->ret_stack = NULL;
+ /* make curr_ret_stack visable before we add the ret_stack */
+ smp_wmb();
+ t->ret_stack = ret_stack;
+ }
}
void ftrace_graph_exit_task(struct task_struct *t)
#include <linux/dcache.h>
#include <linux/fs.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
#include "trace_output.h"
#include "trace.h"
gfp_t gfp_flags,
int node)
{
+ struct ftrace_event_call *call = &event_kmem_alloc;
struct trace_array *tr = kmemtrace_array;
struct kmemtrace_alloc_entry *entry;
struct ring_buffer_event *event;
entry->gfp_flags = gfp_flags;
entry->node = node;
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
trace_wake_up();
}
unsigned long call_site,
const void *ptr)
{
+ struct ftrace_event_call *call = &event_kmem_free;
struct trace_array *tr = kmemtrace_array;
struct kmemtrace_free_entry *entry;
struct ring_buffer_event *event;
entry->call_site = call_site;
entry->ptr = ptr;
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
trace_wake_up();
}
#include "trace.h"
+/*
+ * The ring buffer header is special. We must manually up keep it.
+ */
+int ring_buffer_print_entry_header(struct trace_seq *s)
+{
+ int ret;
+
+ ret = trace_seq_printf(s, "# compressed entry header\n");
+ ret = trace_seq_printf(s, "\ttype_len : 5 bits\n");
+ ret = trace_seq_printf(s, "\ttime_delta : 27 bits\n");
+ ret = trace_seq_printf(s, "\tarray : 32 bits\n");
+ ret = trace_seq_printf(s, "\n");
+ ret = trace_seq_printf(s, "\tpadding : type == %d\n",
+ RINGBUF_TYPE_PADDING);
+ ret = trace_seq_printf(s, "\ttime_extend : type == %d\n",
+ RINGBUF_TYPE_TIME_EXTEND);
+ ret = trace_seq_printf(s, "\tdata max type_len == %d\n",
+ RINGBUF_TYPE_DATA_TYPE_LEN_MAX);
+
+ return ret;
+}
+
/*
* The ring buffer is made up of a list of pages. A separate list of pages is
* allocated for each CPU. A writer may only write to a buffer that is
#define RB_EVNT_HDR_SIZE (offsetof(struct ring_buffer_event, array))
#define RB_ALIGNMENT 4U
-#define RB_MAX_SMALL_DATA 28
+#define RB_MAX_SMALL_DATA (RB_ALIGNMENT * RINGBUF_TYPE_DATA_TYPE_LEN_MAX)
+
+/* define RINGBUF_TYPE_DATA for 'case RINGBUF_TYPE_DATA:' */
+#define RINGBUF_TYPE_DATA 0 ... RINGBUF_TYPE_DATA_TYPE_LEN_MAX
enum {
RB_LEN_TIME_EXTEND = 8,
static inline int rb_null_event(struct ring_buffer_event *event)
{
- return event->type == RINGBUF_TYPE_PADDING && event->time_delta == 0;
+ return event->type_len == RINGBUF_TYPE_PADDING
+ && event->time_delta == 0;
}
static inline int rb_discarded_event(struct ring_buffer_event *event)
{
- return event->type == RINGBUF_TYPE_PADDING && event->time_delta;
+ return event->type_len == RINGBUF_TYPE_PADDING && event->time_delta;
}
static void rb_event_set_padding(struct ring_buffer_event *event)
{
- event->type = RINGBUF_TYPE_PADDING;
+ event->type_len = RINGBUF_TYPE_PADDING;
event->time_delta = 0;
}
-/**
- * ring_buffer_event_discard - discard an event in the ring buffer
- * @buffer: the ring buffer
- * @event: the event to discard
- *
- * Sometimes a event that is in the ring buffer needs to be ignored.
- * This function lets the user discard an event in the ring buffer
- * and then that event will not be read later.
- *
- * Note, it is up to the user to be careful with this, and protect
- * against races. If the user discards an event that has been consumed
- * it is possible that it could corrupt the ring buffer.
- */
-void ring_buffer_event_discard(struct ring_buffer_event *event)
-{
- event->type = RINGBUF_TYPE_PADDING;
- /* time delta must be non zero */
- if (!event->time_delta)
- event->time_delta = 1;
-}
-
static unsigned
rb_event_data_length(struct ring_buffer_event *event)
{
unsigned length;
- if (event->len)
- length = event->len * RB_ALIGNMENT;
+ if (event->type_len)
+ length = event->type_len * RB_ALIGNMENT;
else
length = event->array[0];
return length + RB_EVNT_HDR_SIZE;
static unsigned
rb_event_length(struct ring_buffer_event *event)
{
- switch (event->type) {
+ switch (event->type_len) {
case RINGBUF_TYPE_PADDING:
if (rb_null_event(event))
/* undefined */
return -1;
- return rb_event_data_length(event);
+ return event->array[0] + RB_EVNT_HDR_SIZE;
case RINGBUF_TYPE_TIME_EXTEND:
return RB_LEN_TIME_EXTEND;
unsigned ring_buffer_event_length(struct ring_buffer_event *event)
{
unsigned length = rb_event_length(event);
- if (event->type != RINGBUF_TYPE_DATA)
+ if (event->type_len > RINGBUF_TYPE_DATA_TYPE_LEN_MAX)
return length;
length -= RB_EVNT_HDR_SIZE;
if (length > RB_MAX_SMALL_DATA + sizeof(event->array[0]))
static void *
rb_event_data(struct ring_buffer_event *event)
{
- BUG_ON(event->type != RINGBUF_TYPE_DATA);
+ BUG_ON(event->type_len > RINGBUF_TYPE_DATA_TYPE_LEN_MAX);
/* If length is in len field, then array[0] has the data */
- if (event->len)
+ if (event->type_len)
return (void *)&event->array[0];
/* Otherwise length is in array[0] and array[1] has the data */
return (void *)&event->array[1];
};
struct buffer_page {
+ struct list_head list; /* list of buffer pages */
local_t write; /* index for next write */
unsigned read; /* index for next read */
- struct list_head list; /* list of free pages */
+ local_t entries; /* entries on this page */
struct buffer_data_page *page; /* Actual data page */
};
#define BUF_PAGE_SIZE (PAGE_SIZE - BUF_PAGE_HDR_SIZE)
+/* Max payload is BUF_PAGE_SIZE - header (8bytes) */
+#define BUF_MAX_DATA_SIZE (BUF_PAGE_SIZE - (sizeof(u32) * 2))
+
+/* Max number of timestamps that can fit on a page */
+#define RB_TIMESTAMPS_PER_PAGE (BUF_PAGE_SIZE / RB_LEN_TIME_STAMP)
+
+int ring_buffer_print_page_header(struct trace_seq *s)
+{
+ struct buffer_data_page field;
+ int ret;
+
+ ret = trace_seq_printf(s, "\tfield: u64 timestamp;\t"
+ "offset:0;\tsize:%u;\n",
+ (unsigned int)sizeof(field.time_stamp));
+
+ ret = trace_seq_printf(s, "\tfield: local_t commit;\t"
+ "offset:%u;\tsize:%u;\n",
+ (unsigned int)offsetof(typeof(field), commit),
+ (unsigned int)sizeof(field.commit));
+
+ ret = trace_seq_printf(s, "\tfield: char data;\t"
+ "offset:%u;\tsize:%u;\n",
+ (unsigned int)offsetof(typeof(field), data),
+ (unsigned int)BUF_PAGE_SIZE);
+
+ return ret;
+}
+
/*
* head_page == tail_page && head == tail then buffer is empty.
*/
struct buffer_page *tail_page; /* write to tail */
struct buffer_page *commit_page; /* committed pages */
struct buffer_page *reader_page;
+ unsigned long nmi_dropped;
+ unsigned long commit_overrun;
unsigned long overrun;
- unsigned long entries;
+ unsigned long read;
+ local_t entries;
u64 write_stamp;
u64 read_stamp;
atomic_t record_disabled;
atomic_t record_disabled;
cpumask_var_t cpumask;
+ struct lock_class_key *reader_lock_key;
+
struct mutex mutex;
struct ring_buffer_per_cpu **buffers;
/* Up this if you want to test the TIME_EXTENTS and normalization */
#define DEBUG_SHIFT 0
+static inline u64 rb_time_stamp(struct ring_buffer *buffer, int cpu)
+{
+ /* shift to debug/test normalization and TIME_EXTENTS */
+ return buffer->clock() << DEBUG_SHIFT;
+}
+
u64 ring_buffer_time_stamp(struct ring_buffer *buffer, int cpu)
{
u64 time;
preempt_disable_notrace();
- /* shift to debug/test normalization and TIME_EXTENTS */
- time = buffer->clock() << DEBUG_SHIFT;
+ time = rb_time_stamp(buffer, cpu);
preempt_enable_no_resched_notrace();
return time;
cpu_buffer->cpu = cpu;
cpu_buffer->buffer = buffer;
spin_lock_init(&cpu_buffer->reader_lock);
+ lockdep_set_class(&cpu_buffer->reader_lock, buffer->reader_lock_key);
cpu_buffer->lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
INIT_LIST_HEAD(&cpu_buffer->pages);
* when the buffer wraps. If this flag is not set, the buffer will
* drop data when the tail hits the head.
*/
-struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
+struct ring_buffer *__ring_buffer_alloc(unsigned long size, unsigned flags,
+ struct lock_class_key *key)
{
struct ring_buffer *buffer;
int bsize;
buffer->pages = DIV_ROUND_UP(size, BUF_PAGE_SIZE);
buffer->flags = flags;
buffer->clock = trace_clock_local;
+ buffer->reader_lock_key = key;
/* need at least two pages */
if (buffer->pages == 1)
kfree(buffer);
return NULL;
}
-EXPORT_SYMBOL_GPL(ring_buffer_alloc);
+EXPORT_SYMBOL_GPL(__ring_buffer_alloc);
/**
* ring_buffer_free - free a ring buffer.
return rb_page_commit(cpu_buffer->head_page);
}
-/*
- * When the tail hits the head and the buffer is in overwrite mode,
- * the head jumps to the next page and all content on the previous
- * page is discarded. But before doing so, we update the overrun
- * variable of the buffer.
- */
-static void rb_update_overflow(struct ring_buffer_per_cpu *cpu_buffer)
-{
- struct ring_buffer_event *event;
- unsigned long head;
-
- for (head = 0; head < rb_head_size(cpu_buffer);
- head += rb_event_length(event)) {
-
- event = __rb_page_index(cpu_buffer->head_page, head);
- if (RB_WARN_ON(cpu_buffer, rb_null_event(event)))
- return;
- /* Only count data entries */
- if (event->type != RINGBUF_TYPE_DATA)
- continue;
- cpu_buffer->overrun++;
- cpu_buffer->entries--;
- }
-}
-
static inline void rb_inc_page(struct ring_buffer_per_cpu *cpu_buffer,
struct buffer_page **bpage)
{
return (addr & ~PAGE_MASK) - (PAGE_SIZE - BUF_PAGE_SIZE);
}
-static int
+static inline int
rb_is_commit(struct ring_buffer_per_cpu *cpu_buffer,
struct ring_buffer_event *event)
{
rb_update_event(struct ring_buffer_event *event,
unsigned type, unsigned length)
{
- event->type = type;
+ event->type_len = type;
switch (type) {
case RINGBUF_TYPE_PADDING:
- break;
-
case RINGBUF_TYPE_TIME_EXTEND:
- event->len = DIV_ROUND_UP(RB_LEN_TIME_EXTEND, RB_ALIGNMENT);
- break;
-
case RINGBUF_TYPE_TIME_STAMP:
- event->len = DIV_ROUND_UP(RB_LEN_TIME_STAMP, RB_ALIGNMENT);
break;
- case RINGBUF_TYPE_DATA:
+ case 0:
length -= RB_EVNT_HDR_SIZE;
- if (length > RB_MAX_SMALL_DATA) {
- event->len = 0;
+ if (length > RB_MAX_SMALL_DATA)
event->array[0] = length;
- } else
- event->len = DIV_ROUND_UP(length, RB_ALIGNMENT);
+ else
+ event->type_len = DIV_ROUND_UP(length, RB_ALIGNMENT);
break;
default:
BUG();
return length;
}
+
static struct ring_buffer_event *
-__rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
- unsigned type, unsigned long length, u64 *ts)
+rb_move_tail(struct ring_buffer_per_cpu *cpu_buffer,
+ unsigned long length, unsigned long tail,
+ struct buffer_page *commit_page,
+ struct buffer_page *tail_page, u64 *ts)
{
- struct buffer_page *tail_page, *head_page, *reader_page, *commit_page;
- unsigned long tail, write;
+ struct buffer_page *next_page, *head_page, *reader_page;
struct ring_buffer *buffer = cpu_buffer->buffer;
struct ring_buffer_event *event;
- unsigned long flags;
bool lock_taken = false;
+ unsigned long flags;
- commit_page = cpu_buffer->commit_page;
- /* we just need to protect against interrupts */
- barrier();
- tail_page = cpu_buffer->tail_page;
- write = local_add_return(length, &tail_page->write);
- tail = write - length;
+ next_page = tail_page;
- /* See if we shot pass the end of this buffer page */
- if (write > BUF_PAGE_SIZE) {
- struct buffer_page *next_page = tail_page;
+ local_irq_save(flags);
+ /*
+ * Since the write to the buffer is still not
+ * fully lockless, we must be careful with NMIs.
+ * The locks in the writers are taken when a write
+ * crosses to a new page. The locks protect against
+ * races with the readers (this will soon be fixed
+ * with a lockless solution).
+ *
+ * Because we can not protect against NMIs, and we
+ * want to keep traces reentrant, we need to manage
+ * what happens when we are in an NMI.
+ *
+ * NMIs can happen after we take the lock.
+ * If we are in an NMI, only take the lock
+ * if it is not already taken. Otherwise
+ * simply fail.
+ */
+ if (unlikely(in_nmi())) {
+ if (!__raw_spin_trylock(&cpu_buffer->lock)) {
+ cpu_buffer->nmi_dropped++;
+ goto out_reset;
+ }
+ } else
+ __raw_spin_lock(&cpu_buffer->lock);
- local_irq_save(flags);
- /*
- * Since the write to the buffer is still not
- * fully lockless, we must be careful with NMIs.
- * The locks in the writers are taken when a write
- * crosses to a new page. The locks protect against
- * races with the readers (this will soon be fixed
- * with a lockless solution).
- *
- * Because we can not protect against NMIs, and we
- * want to keep traces reentrant, we need to manage
- * what happens when we are in an NMI.
- *
- * NMIs can happen after we take the lock.
- * If we are in an NMI, only take the lock
- * if it is not already taken. Otherwise
- * simply fail.
- */
- if (unlikely(in_nmi())) {
- if (!__raw_spin_trylock(&cpu_buffer->lock))
- goto out_reset;
- } else
- __raw_spin_lock(&cpu_buffer->lock);
+ lock_taken = true;
- lock_taken = true;
+ rb_inc_page(cpu_buffer, &next_page);
- rb_inc_page(cpu_buffer, &next_page);
+ head_page = cpu_buffer->head_page;
+ reader_page = cpu_buffer->reader_page;
- head_page = cpu_buffer->head_page;
- reader_page = cpu_buffer->reader_page;
+ /* we grabbed the lock before incrementing */
+ if (RB_WARN_ON(cpu_buffer, next_page == reader_page))
+ goto out_reset;
- /* we grabbed the lock before incrementing */
- if (RB_WARN_ON(cpu_buffer, next_page == reader_page))
- goto out_reset;
+ /*
+ * If for some reason, we had an interrupt storm that made
+ * it all the way around the buffer, bail, and warn
+ * about it.
+ */
+ if (unlikely(next_page == commit_page)) {
+ cpu_buffer->commit_overrun++;
+ goto out_reset;
+ }
- /*
- * If for some reason, we had an interrupt storm that made
- * it all the way around the buffer, bail, and warn
- * about it.
- */
- if (unlikely(next_page == commit_page)) {
- WARN_ON_ONCE(1);
+ if (next_page == head_page) {
+ if (!(buffer->flags & RB_FL_OVERWRITE))
goto out_reset;
- }
- if (next_page == head_page) {
- if (!(buffer->flags & RB_FL_OVERWRITE))
- goto out_reset;
-
- /* tail_page has not moved yet? */
- if (tail_page == cpu_buffer->tail_page) {
- /* count overflows */
- rb_update_overflow(cpu_buffer);
+ /* tail_page has not moved yet? */
+ if (tail_page == cpu_buffer->tail_page) {
+ /* count overflows */
+ cpu_buffer->overrun +=
+ local_read(&head_page->entries);
- rb_inc_page(cpu_buffer, &head_page);
- cpu_buffer->head_page = head_page;
- cpu_buffer->head_page->read = 0;
- }
+ rb_inc_page(cpu_buffer, &head_page);
+ cpu_buffer->head_page = head_page;
+ cpu_buffer->head_page->read = 0;
}
+ }
- /*
- * If the tail page is still the same as what we think
- * it is, then it is up to us to update the tail
- * pointer.
- */
- if (tail_page == cpu_buffer->tail_page) {
- local_set(&next_page->write, 0);
- local_set(&next_page->page->commit, 0);
- cpu_buffer->tail_page = next_page;
+ /*
+ * If the tail page is still the same as what we think
+ * it is, then it is up to us to update the tail
+ * pointer.
+ */
+ if (tail_page == cpu_buffer->tail_page) {
+ local_set(&next_page->write, 0);
+ local_set(&next_page->entries, 0);
+ local_set(&next_page->page->commit, 0);
+ cpu_buffer->tail_page = next_page;
+
+ /* reread the time stamp */
+ *ts = rb_time_stamp(buffer, cpu_buffer->cpu);
+ cpu_buffer->tail_page->page->time_stamp = *ts;
+ }
- /* reread the time stamp */
- *ts = ring_buffer_time_stamp(buffer, cpu_buffer->cpu);
- cpu_buffer->tail_page->page->time_stamp = *ts;
- }
+ /*
+ * The actual tail page has moved forward.
+ */
+ if (tail < BUF_PAGE_SIZE) {
+ /* Mark the rest of the page with padding */
+ event = __rb_page_index(tail_page, tail);
+ rb_event_set_padding(event);
+ }
- /*
- * The actual tail page has moved forward.
- */
- if (tail < BUF_PAGE_SIZE) {
- /* Mark the rest of the page with padding */
- event = __rb_page_index(tail_page, tail);
- rb_event_set_padding(event);
- }
+ /* Set the write back to the previous setting */
+ local_sub(length, &tail_page->write);
- if (tail <= BUF_PAGE_SIZE)
- /* Set the write back to the previous setting */
- local_set(&tail_page->write, tail);
+ /*
+ * If this was a commit entry that failed,
+ * increment that too
+ */
+ if (tail_page == cpu_buffer->commit_page &&
+ tail == rb_commit_index(cpu_buffer)) {
+ rb_set_commit_to_write(cpu_buffer);
+ }
- /*
- * If this was a commit entry that failed,
- * increment that too
- */
- if (tail_page == cpu_buffer->commit_page &&
- tail == rb_commit_index(cpu_buffer)) {
- rb_set_commit_to_write(cpu_buffer);
- }
+ __raw_spin_unlock(&cpu_buffer->lock);
+ local_irq_restore(flags);
+
+ /* fail and let the caller try again */
+ return ERR_PTR(-EAGAIN);
+
+ out_reset:
+ /* reset write */
+ local_sub(length, &tail_page->write);
+ if (likely(lock_taken))
__raw_spin_unlock(&cpu_buffer->lock);
- local_irq_restore(flags);
+ local_irq_restore(flags);
+ return NULL;
+}
- /* fail and let the caller try again */
- return ERR_PTR(-EAGAIN);
- }
+static struct ring_buffer_event *
+__rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
+ unsigned type, unsigned long length, u64 *ts)
+{
+ struct buffer_page *tail_page, *commit_page;
+ struct ring_buffer_event *event;
+ unsigned long tail, write;
+
+ commit_page = cpu_buffer->commit_page;
+ /* we just need to protect against interrupts */
+ barrier();
+ tail_page = cpu_buffer->tail_page;
+ write = local_add_return(length, &tail_page->write);
+ tail = write - length;
+
+ /* See if we shot pass the end of this buffer page */
+ if (write > BUF_PAGE_SIZE)
+ return rb_move_tail(cpu_buffer, length, tail,
+ commit_page, tail_page, ts);
/* We reserved something on the buffer */
event = __rb_page_index(tail_page, tail);
rb_update_event(event, type, length);
+ /* The passed in type is zero for DATA */
+ if (likely(!type))
+ local_inc(&tail_page->entries);
+
/*
* If this is a commit and the tail is zero, then update
* this page's time stamp.
cpu_buffer->commit_page->page->time_stamp = *ts;
return event;
+}
- out_reset:
- /* reset write */
- if (tail <= BUF_PAGE_SIZE)
- local_set(&tail_page->write, tail);
+static inline int
+rb_try_to_discard(struct ring_buffer_per_cpu *cpu_buffer,
+ struct ring_buffer_event *event)
+{
+ unsigned long new_index, old_index;
+ struct buffer_page *bpage;
+ unsigned long index;
+ unsigned long addr;
- if (likely(lock_taken))
- __raw_spin_unlock(&cpu_buffer->lock);
- local_irq_restore(flags);
- return NULL;
+ new_index = rb_event_index(event);
+ old_index = new_index + rb_event_length(event);
+ addr = (unsigned long)event;
+ addr &= PAGE_MASK;
+
+ bpage = cpu_buffer->tail_page;
+
+ if (bpage->page == (void *)addr && rb_page_write(bpage) == old_index) {
+ /*
+ * This is on the tail page. It is possible that
+ * a write could come in and move the tail page
+ * and write to the next page. That is fine
+ * because we just shorten what is on this page.
+ */
+ index = local_cmpxchg(&bpage->write, old_index, new_index);
+ if (index == old_index)
+ return 1;
+ }
+
+ /* could not discard */
+ return 0;
}
static int
event->array[0] = *delta >> TS_SHIFT;
} else {
cpu_buffer->commit_page->page->time_stamp = *ts;
- event->time_delta = 0;
- event->array[0] = 0;
+ /* try to discard, since we do not need this */
+ if (!rb_try_to_discard(cpu_buffer, event)) {
+ /* nope, just zero it */
+ event->time_delta = 0;
+ event->array[0] = 0;
+ }
}
cpu_buffer->write_stamp = *ts;
/* let the caller know this was the commit */
ret = 1;
} else {
- /* Darn, this is just wasted space */
- event->time_delta = 0;
- event->array[0] = 0;
+ /* Try to discard the event */
+ if (!rb_try_to_discard(cpu_buffer, event)) {
+ /* Darn, this is just wasted space */
+ event->time_delta = 0;
+ event->array[0] = 0;
+ }
ret = 0;
}
static struct ring_buffer_event *
rb_reserve_next_event(struct ring_buffer_per_cpu *cpu_buffer,
- unsigned type, unsigned long length)
+ unsigned long length)
{
struct ring_buffer_event *event;
- u64 ts, delta;
+ u64 ts, delta = 0;
int commit = 0;
int nr_loops = 0;
+ length = rb_calculate_event_length(length);
again:
/*
* We allow for interrupts to reenter here and do a trace.
if (RB_WARN_ON(cpu_buffer, ++nr_loops > 1000))
return NULL;
- ts = ring_buffer_time_stamp(cpu_buffer->buffer, cpu_buffer->cpu);
+ ts = rb_time_stamp(cpu_buffer->buffer, cpu_buffer->cpu);
/*
* Only the first commit can update the timestamp.
* also be made. But only the entry that did the actual
* commit will be something other than zero.
*/
- if (cpu_buffer->tail_page == cpu_buffer->commit_page &&
- rb_page_write(cpu_buffer->tail_page) ==
- rb_commit_index(cpu_buffer)) {
+ if (likely(cpu_buffer->tail_page == cpu_buffer->commit_page &&
+ rb_page_write(cpu_buffer->tail_page) ==
+ rb_commit_index(cpu_buffer))) {
+ u64 diff;
- delta = ts - cpu_buffer->write_stamp;
+ diff = ts - cpu_buffer->write_stamp;
- /* make sure this delta is calculated here */
+ /* make sure this diff is calculated here */
barrier();
/* Did the write stamp get updated already? */
if (unlikely(ts < cpu_buffer->write_stamp))
- delta = 0;
+ goto get_event;
- if (test_time_stamp(delta)) {
+ delta = diff;
+ if (unlikely(test_time_stamp(delta))) {
commit = rb_add_time_stamp(cpu_buffer, &ts, &delta);
-
if (commit == -EBUSY)
return NULL;
RB_WARN_ON(cpu_buffer, commit < 0);
}
- } else
- /* Non commits have zero deltas */
- delta = 0;
+ }
- event = __rb_reserve_next(cpu_buffer, type, length, &ts);
- if (PTR_ERR(event) == -EAGAIN)
+ get_event:
+ event = __rb_reserve_next(cpu_buffer, 0, length, &ts);
+ if (unlikely(PTR_ERR(event) == -EAGAIN))
goto again;
if (!event) {
* If the timestamp was commited, make the commit our entry
* now so that we will update it when needed.
*/
- if (commit)
+ if (unlikely(commit))
rb_set_commit_event(cpu_buffer, event);
else if (!rb_is_commit(cpu_buffer, event))
delta = 0;
return event;
}
+#define TRACE_RECURSIVE_DEPTH 16
+
+static int trace_recursive_lock(void)
+{
+ current->trace_recursion++;
+
+ if (likely(current->trace_recursion < TRACE_RECURSIVE_DEPTH))
+ return 0;
+
+ /* Disable all tracing before we do anything else */
+ tracing_off_permanent();
+
+ printk_once(KERN_WARNING "Tracing recursion: depth[%ld]:"
+ "HC[%lu]:SC[%lu]:NMI[%lu]\n",
+ current->trace_recursion,
+ hardirq_count() >> HARDIRQ_SHIFT,
+ softirq_count() >> SOFTIRQ_SHIFT,
+ in_nmi());
+
+ WARN_ON_ONCE(1);
+ return -1;
+}
+
+static void trace_recursive_unlock(void)
+{
+ WARN_ON_ONCE(!current->trace_recursion);
+
+ current->trace_recursion--;
+}
+
static DEFINE_PER_CPU(int, rb_need_resched);
/**
/* If we are tracing schedule, we don't want to recurse */
resched = ftrace_preempt_disable();
+ if (trace_recursive_lock())
+ goto out_nocheck;
+
cpu = raw_smp_processor_id();
if (!cpumask_test_cpu(cpu, buffer->cpumask))
if (atomic_read(&cpu_buffer->record_disabled))
goto out;
- length = rb_calculate_event_length(length);
- if (length > BUF_PAGE_SIZE)
+ if (length > BUF_MAX_DATA_SIZE)
goto out;
- event = rb_reserve_next_event(cpu_buffer, RINGBUF_TYPE_DATA, length);
+ event = rb_reserve_next_event(cpu_buffer, length);
if (!event)
goto out;
return event;
out:
+ trace_recursive_unlock();
+
+ out_nocheck:
ftrace_preempt_enable(resched);
return NULL;
}
static void rb_commit(struct ring_buffer_per_cpu *cpu_buffer,
struct ring_buffer_event *event)
{
- cpu_buffer->entries++;
+ local_inc(&cpu_buffer->entries);
/* Only process further if we own the commit */
if (!rb_is_commit(cpu_buffer, event))
rb_commit(cpu_buffer, event);
+ trace_recursive_unlock();
+
/*
* Only the last preempt count needs to restore preemption.
*/
}
EXPORT_SYMBOL_GPL(ring_buffer_unlock_commit);
+static inline void rb_event_discard(struct ring_buffer_event *event)
+{
+ /* array[0] holds the actual length for the discarded event */
+ event->array[0] = rb_event_data_length(event) - RB_EVNT_HDR_SIZE;
+ event->type_len = RINGBUF_TYPE_PADDING;
+ /* time delta must be non zero */
+ if (!event->time_delta)
+ event->time_delta = 1;
+}
+
+/**
+ * ring_buffer_event_discard - discard any event in the ring buffer
+ * @event: the event to discard
+ *
+ * Sometimes a event that is in the ring buffer needs to be ignored.
+ * This function lets the user discard an event in the ring buffer
+ * and then that event will not be read later.
+ *
+ * Note, it is up to the user to be careful with this, and protect
+ * against races. If the user discards an event that has been consumed
+ * it is possible that it could corrupt the ring buffer.
+ */
+void ring_buffer_event_discard(struct ring_buffer_event *event)
+{
+ rb_event_discard(event);
+}
+EXPORT_SYMBOL_GPL(ring_buffer_event_discard);
+
+/**
+ * ring_buffer_commit_discard - discard an event that has not been committed
+ * @buffer: the ring buffer
+ * @event: non committed event to discard
+ *
+ * This is similar to ring_buffer_event_discard but must only be
+ * performed on an event that has not been committed yet. The difference
+ * is that this will also try to free the event from the ring buffer
+ * if another event has not been added behind it.
+ *
+ * If another event has been added behind it, it will set the event
+ * up as discarded, and perform the commit.
+ *
+ * If this function is called, do not call ring_buffer_unlock_commit on
+ * the event.
+ */
+void ring_buffer_discard_commit(struct ring_buffer *buffer,
+ struct ring_buffer_event *event)
+{
+ struct ring_buffer_per_cpu *cpu_buffer;
+ int cpu;
+
+ /* The event is discarded regardless */
+ rb_event_discard(event);
+
+ /*
+ * This must only be called if the event has not been
+ * committed yet. Thus we can assume that preemption
+ * is still disabled.
+ */
+ RB_WARN_ON(buffer, preemptible());
+
+ cpu = smp_processor_id();
+ cpu_buffer = buffer->buffers[cpu];
+
+ if (!rb_try_to_discard(cpu_buffer, event))
+ goto out;
+
+ /*
+ * The commit is still visible by the reader, so we
+ * must increment entries.
+ */
+ local_inc(&cpu_buffer->entries);
+ out:
+ /*
+ * If a write came in and pushed the tail page
+ * we still need to update the commit pointer
+ * if we were the commit.
+ */
+ if (rb_is_commit(cpu_buffer, event))
+ rb_set_commit_to_write(cpu_buffer);
+
+ trace_recursive_unlock();
+
+ /*
+ * Only the last preempt count needs to restore preemption.
+ */
+ if (preempt_count() == 1)
+ ftrace_preempt_enable(per_cpu(rb_need_resched, cpu));
+ else
+ preempt_enable_no_resched_notrace();
+
+}
+EXPORT_SYMBOL_GPL(ring_buffer_discard_commit);
+
/**
* ring_buffer_write - write data to the buffer without reserving
* @buffer: The ring buffer to write to.
{
struct ring_buffer_per_cpu *cpu_buffer;
struct ring_buffer_event *event;
- unsigned long event_length;
void *body;
int ret = -EBUSY;
int cpu, resched;
if (atomic_read(&cpu_buffer->record_disabled))
goto out;
- event_length = rb_calculate_event_length(length);
- event = rb_reserve_next_event(cpu_buffer,
- RINGBUF_TYPE_DATA, event_length);
+ if (length > BUF_MAX_DATA_SIZE)
+ goto out;
+
+ event = rb_reserve_next_event(cpu_buffer, length);
if (!event)
goto out;
return 0;
cpu_buffer = buffer->buffers[cpu];
- ret = cpu_buffer->entries;
+ ret = (local_read(&cpu_buffer->entries) - cpu_buffer->overrun)
+ - cpu_buffer->read;
return ret;
}
}
EXPORT_SYMBOL_GPL(ring_buffer_overrun_cpu);
+/**
+ * ring_buffer_nmi_dropped_cpu - get the number of nmis that were dropped
+ * @buffer: The ring buffer
+ * @cpu: The per CPU buffer to get the number of overruns from
+ */
+unsigned long ring_buffer_nmi_dropped_cpu(struct ring_buffer *buffer, int cpu)
+{
+ struct ring_buffer_per_cpu *cpu_buffer;
+ unsigned long ret;
+
+ if (!cpumask_test_cpu(cpu, buffer->cpumask))
+ return 0;
+
+ cpu_buffer = buffer->buffers[cpu];
+ ret = cpu_buffer->nmi_dropped;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ring_buffer_nmi_dropped_cpu);
+
+/**
+ * ring_buffer_commit_overrun_cpu - get the number of overruns caused by commits
+ * @buffer: The ring buffer
+ * @cpu: The per CPU buffer to get the number of overruns from
+ */
+unsigned long
+ring_buffer_commit_overrun_cpu(struct ring_buffer *buffer, int cpu)
+{
+ struct ring_buffer_per_cpu *cpu_buffer;
+ unsigned long ret;
+
+ if (!cpumask_test_cpu(cpu, buffer->cpumask))
+ return 0;
+
+ cpu_buffer = buffer->buffers[cpu];
+ ret = cpu_buffer->commit_overrun;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ring_buffer_commit_overrun_cpu);
+
/**
* ring_buffer_entries - get the number of entries in a buffer
* @buffer: The ring buffer
/* if you care about this being correct, lock the buffer */
for_each_buffer_cpu(buffer, cpu) {
cpu_buffer = buffer->buffers[cpu];
- entries += cpu_buffer->entries;
+ entries += (local_read(&cpu_buffer->entries) -
+ cpu_buffer->overrun) - cpu_buffer->read;
}
return entries;
{
u64 delta;
- switch (event->type) {
+ switch (event->type_len) {
case RINGBUF_TYPE_PADDING:
return;
{
u64 delta;
- switch (event->type) {
+ switch (event->type_len) {
case RINGBUF_TYPE_PADDING:
return;
cpu_buffer->reader_page->list.prev = reader->list.prev;
local_set(&cpu_buffer->reader_page->write, 0);
+ local_set(&cpu_buffer->reader_page->entries, 0);
local_set(&cpu_buffer->reader_page->page->commit, 0);
/* Make the reader page now replace the head */
event = rb_reader_event(cpu_buffer);
- if (event->type == RINGBUF_TYPE_DATA || rb_discarded_event(event))
- cpu_buffer->entries--;
+ if (event->type_len <= RINGBUF_TYPE_DATA_TYPE_LEN_MAX
+ || rb_discarded_event(event))
+ cpu_buffer->read++;
rb_update_read_stamp(cpu_buffer, event);
* Check if we are at the end of the buffer.
*/
if (iter->head >= rb_page_size(iter->head_page)) {
- if (RB_WARN_ON(buffer,
- iter->head_page == cpu_buffer->commit_page))
+ /* discarded commits can make the page empty */
+ if (iter->head_page == cpu_buffer->commit_page)
return;
rb_inc_iter(iter);
return;
/*
* We repeat when a timestamp is encountered. It is possible
* to get multiple timestamps from an interrupt entering just
- * as one timestamp is about to be written. The max times
- * that this can happen is the number of nested interrupts we
- * can have. Nesting 10 deep of interrupts is clearly
- * an anomaly.
+ * as one timestamp is about to be written, or from discarded
+ * commits. The most that we can have is the number on a single page.
*/
- if (RB_WARN_ON(cpu_buffer, ++nr_loops > 10))
+ if (RB_WARN_ON(cpu_buffer, ++nr_loops > RB_TIMESTAMPS_PER_PAGE))
return NULL;
reader = rb_get_reader_page(cpu_buffer);
event = rb_reader_event(cpu_buffer);
- switch (event->type) {
+ switch (event->type_len) {
case RINGBUF_TYPE_PADDING:
if (rb_null_event(event))
RB_WARN_ON(cpu_buffer, 1);
again:
/*
- * We repeat when a timestamp is encountered. It is possible
- * to get multiple timestamps from an interrupt entering just
- * as one timestamp is about to be written. The max times
- * that this can happen is the number of nested interrupts we
- * can have. Nesting 10 deep of interrupts is clearly
- * an anomaly.
+ * We repeat when a timestamp is encountered.
+ * We can get multiple timestamps by nested interrupts or also
+ * if filtering is on (discarding commits). Since discarding
+ * commits can be frequent we can get a lot of timestamps.
+ * But we limit them by not adding timestamps if they begin
+ * at the start of a page.
*/
- if (RB_WARN_ON(cpu_buffer, ++nr_loops > 10))
+ if (RB_WARN_ON(cpu_buffer, ++nr_loops > RB_TIMESTAMPS_PER_PAGE))
return NULL;
if (rb_per_cpu_empty(cpu_buffer))
event = rb_iter_head_event(iter);
- switch (event->type) {
+ switch (event->type_len) {
case RINGBUF_TYPE_PADDING:
if (rb_null_event(event)) {
rb_inc_iter(iter);
event = rb_buffer_peek(buffer, cpu, ts);
spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
- if (event && event->type == RINGBUF_TYPE_PADDING) {
+ if (event && event->type_len == RINGBUF_TYPE_PADDING) {
cpu_relax();
goto again;
}
event = rb_iter_peek(iter, ts);
spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
- if (event && event->type == RINGBUF_TYPE_PADDING) {
+ if (event && event->type_len == RINGBUF_TYPE_PADDING) {
cpu_relax();
goto again;
}
out:
preempt_enable();
- if (event && event->type == RINGBUF_TYPE_PADDING) {
+ if (event && event->type_len == RINGBUF_TYPE_PADDING) {
cpu_relax();
goto again;
}
out:
spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
- if (event && event->type == RINGBUF_TYPE_PADDING) {
+ if (event && event->type_len == RINGBUF_TYPE_PADDING) {
cpu_relax();
goto again;
}
cpu_buffer->head_page
= list_entry(cpu_buffer->pages.next, struct buffer_page, list);
local_set(&cpu_buffer->head_page->write, 0);
+ local_set(&cpu_buffer->head_page->entries, 0);
local_set(&cpu_buffer->head_page->page->commit, 0);
cpu_buffer->head_page->read = 0;
INIT_LIST_HEAD(&cpu_buffer->reader_page->list);
local_set(&cpu_buffer->reader_page->write, 0);
+ local_set(&cpu_buffer->reader_page->entries, 0);
local_set(&cpu_buffer->reader_page->page->commit, 0);
cpu_buffer->reader_page->read = 0;
+ cpu_buffer->nmi_dropped = 0;
+ cpu_buffer->commit_overrun = 0;
cpu_buffer->overrun = 0;
- cpu_buffer->entries = 0;
+ cpu_buffer->read = 0;
+ local_set(&cpu_buffer->entries, 0);
cpu_buffer->write_stamp = 0;
cpu_buffer->read_stamp = 0;
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return;
+ atomic_inc(&cpu_buffer->record_disabled);
+
spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
__raw_spin_lock(&cpu_buffer->lock);
__raw_spin_unlock(&cpu_buffer->lock);
spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
+
+ atomic_dec(&cpu_buffer->record_disabled);
}
EXPORT_SYMBOL_GPL(ring_buffer_reset_cpu);
}
EXPORT_SYMBOL_GPL(ring_buffer_swap_cpu);
-static void rb_remove_entries(struct ring_buffer_per_cpu *cpu_buffer,
- struct buffer_data_page *bpage,
- unsigned int offset)
-{
- struct ring_buffer_event *event;
- unsigned long head;
-
- __raw_spin_lock(&cpu_buffer->lock);
- for (head = offset; head < local_read(&bpage->commit);
- head += rb_event_length(event)) {
-
- event = __rb_data_page_index(bpage, head);
- if (RB_WARN_ON(cpu_buffer, rb_null_event(event)))
- return;
- /* Only count data entries */
- if (event->type != RINGBUF_TYPE_DATA)
- continue;
- cpu_buffer->entries--;
- }
- __raw_spin_unlock(&cpu_buffer->lock);
-}
-
/**
* ring_buffer_alloc_read_page - allocate a page to read from buffer
* @buffer: the buffer to allocate for.
return bpage;
}
+EXPORT_SYMBOL_GPL(ring_buffer_alloc_read_page);
/**
* ring_buffer_free_read_page - free an allocated read page
{
free_page((unsigned long)data);
}
+EXPORT_SYMBOL_GPL(ring_buffer_free_read_page);
/**
* ring_buffer_read_page - extract a page from the ring buffer
/* we copied everything to the beginning */
read = 0;
} else {
+ /* update the entry counter */
+ cpu_buffer->read += local_read(&reader->entries);
+
/* swap the pages */
rb_init_page(bpage);
bpage = reader->page;
reader->page = *data_page;
local_set(&reader->write, 0);
+ local_set(&reader->entries, 0);
reader->read = 0;
*data_page = bpage;
-
- /* update the entry counter */
- rb_remove_entries(cpu_buffer, bpage, read);
}
ret = read;
out:
return ret;
}
+EXPORT_SYMBOL_GPL(ring_buffer_read_page);
static ssize_t
rb_simple_read(struct file *filp, char __user *ubuf,
static __init int rb_init_debugfs(void)
{
struct dentry *d_tracer;
- struct dentry *entry;
d_tracer = tracing_init_dentry();
- entry = debugfs_create_file("tracing_on", 0644, d_tracer,
- &ring_buffer_flags, &rb_simple_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'tracing_on' entry\n");
+ trace_create_file("tracing_on", 0644, d_tracer,
+ &ring_buffer_flags, &rb_simple_fops);
return 0;
}
--- /dev/null
+/*
+ * ring buffer tester and benchmark
+ *
+ * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
+ */
+#include <linux/ring_buffer.h>
+#include <linux/completion.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/time.h>
+
+struct rb_page {
+ u64 ts;
+ local_t commit;
+ char data[4080];
+};
+
+/* run time and sleep time in seconds */
+#define RUN_TIME 10
+#define SLEEP_TIME 10
+
+/* number of events for writer to wake up the reader */
+static int wakeup_interval = 100;
+
+static int reader_finish;
+static struct completion read_start;
+static struct completion read_done;
+
+static struct ring_buffer *buffer;
+static struct task_struct *producer;
+static struct task_struct *consumer;
+static unsigned long read;
+
+static int disable_reader;
+module_param(disable_reader, uint, 0644);
+MODULE_PARM_DESC(disable_reader, "only run producer");
+
+static int read_events;
+
+static int kill_test;
+
+#define KILL_TEST() \
+ do { \
+ if (!kill_test) { \
+ kill_test = 1; \
+ WARN_ON(1); \
+ } \
+ } while (0)
+
+enum event_status {
+ EVENT_FOUND,
+ EVENT_DROPPED,
+};
+
+static enum event_status read_event(int cpu)
+{
+ struct ring_buffer_event *event;
+ int *entry;
+ u64 ts;
+
+ event = ring_buffer_consume(buffer, cpu, &ts);
+ if (!event)
+ return EVENT_DROPPED;
+
+ entry = ring_buffer_event_data(event);
+ if (*entry != cpu) {
+ KILL_TEST();
+ return EVENT_DROPPED;
+ }
+
+ read++;
+ return EVENT_FOUND;
+}
+
+static enum event_status read_page(int cpu)
+{
+ struct ring_buffer_event *event;
+ struct rb_page *rpage;
+ unsigned long commit;
+ void *bpage;
+ int *entry;
+ int ret;
+ int inc;
+ int i;
+
+ bpage = ring_buffer_alloc_read_page(buffer);
+ if (!bpage)
+ return EVENT_DROPPED;
+
+ ret = ring_buffer_read_page(buffer, &bpage, PAGE_SIZE, cpu, 1);
+ if (ret >= 0) {
+ rpage = bpage;
+ commit = local_read(&rpage->commit);
+ for (i = 0; i < commit && !kill_test; i += inc) {
+
+ if (i >= (PAGE_SIZE - offsetof(struct rb_page, data))) {
+ KILL_TEST();
+ break;
+ }
+
+ inc = -1;
+ event = (void *)&rpage->data[i];
+ switch (event->type_len) {
+ case RINGBUF_TYPE_PADDING:
+ /* We don't expect any padding */
+ KILL_TEST();
+ break;
+ case RINGBUF_TYPE_TIME_EXTEND:
+ inc = 8;
+ break;
+ case 0:
+ entry = ring_buffer_event_data(event);
+ if (*entry != cpu) {
+ KILL_TEST();
+ break;
+ }
+ read++;
+ if (!event->array[0]) {
+ KILL_TEST();
+ break;
+ }
+ inc = event->array[0];
+ break;
+ default:
+ entry = ring_buffer_event_data(event);
+ if (*entry != cpu) {
+ KILL_TEST();
+ break;
+ }
+ read++;
+ inc = ((event->type_len + 1) * 4);
+ }
+ if (kill_test)
+ break;
+
+ if (inc <= 0) {
+ KILL_TEST();
+ break;
+ }
+ }
+ }
+ ring_buffer_free_read_page(buffer, bpage);
+
+ if (ret < 0)
+ return EVENT_DROPPED;
+ return EVENT_FOUND;
+}
+
+static void ring_buffer_consumer(void)
+{
+ /* toggle between reading pages and events */
+ read_events ^= 1;
+
+ read = 0;
+ while (!reader_finish && !kill_test) {
+ int found;
+
+ do {
+ int cpu;
+
+ found = 0;
+ for_each_online_cpu(cpu) {
+ enum event_status stat;
+
+ if (read_events)
+ stat = read_event(cpu);
+ else
+ stat = read_page(cpu);
+
+ if (kill_test)
+ break;
+ if (stat == EVENT_FOUND)
+ found = 1;
+ }
+ } while (found && !kill_test);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (reader_finish)
+ break;
+
+ schedule();
+ __set_current_state(TASK_RUNNING);
+ }
+ reader_finish = 0;
+ complete(&read_done);
+}
+
+static void ring_buffer_producer(void)
+{
+ struct timeval start_tv;
+ struct timeval end_tv;
+ unsigned long long time;
+ unsigned long long entries;
+ unsigned long long overruns;
+ unsigned long missed = 0;
+ unsigned long hit = 0;
+ unsigned long avg;
+ int cnt = 0;
+
+ /*
+ * Hammer the buffer for 10 secs (this may
+ * make the system stall)
+ */
+ pr_info("Starting ring buffer hammer\n");
+ do_gettimeofday(&start_tv);
+ do {
+ struct ring_buffer_event *event;
+ int *entry;
+
+ event = ring_buffer_lock_reserve(buffer, 10);
+ if (!event) {
+ missed++;
+ } else {
+ hit++;
+ entry = ring_buffer_event_data(event);
+ *entry = smp_processor_id();
+ ring_buffer_unlock_commit(buffer, event);
+ }
+ do_gettimeofday(&end_tv);
+
+ cnt++;
+ if (consumer && !(cnt % wakeup_interval))
+ wake_up_process(consumer);
+
+#ifndef CONFIG_PREEMPT
+ /*
+ * If we are a non preempt kernel, the 10 second run will
+ * stop everything while it runs. Instead, we will call
+ * cond_resched and also add any time that was lost by a
+ * rescedule.
+ *
+ * Do a cond resched at the same frequency we would wake up
+ * the reader.
+ */
+ if (cnt % wakeup_interval)
+ cond_resched();
+#endif
+
+ } while (end_tv.tv_sec < (start_tv.tv_sec + RUN_TIME) && !kill_test);
+ pr_info("End ring buffer hammer\n");
+
+ if (consumer) {
+ /* Init both completions here to avoid races */
+ init_completion(&read_start);
+ init_completion(&read_done);
+ /* the completions must be visible before the finish var */
+ smp_wmb();
+ reader_finish = 1;
+ /* finish var visible before waking up the consumer */
+ smp_wmb();
+ wake_up_process(consumer);
+ wait_for_completion(&read_done);
+ }
+
+ time = end_tv.tv_sec - start_tv.tv_sec;
+ time *= USEC_PER_SEC;
+ time += (long long)((long)end_tv.tv_usec - (long)start_tv.tv_usec);
+
+ entries = ring_buffer_entries(buffer);
+ overruns = ring_buffer_overruns(buffer);
+
+ if (kill_test)
+ pr_info("ERROR!\n");
+ pr_info("Time: %lld (usecs)\n", time);
+ pr_info("Overruns: %lld\n", overruns);
+ if (disable_reader)
+ pr_info("Read: (reader disabled)\n");
+ else
+ pr_info("Read: %ld (by %s)\n", read,
+ read_events ? "events" : "pages");
+ pr_info("Entries: %lld\n", entries);
+ pr_info("Total: %lld\n", entries + overruns + read);
+ pr_info("Missed: %ld\n", missed);
+ pr_info("Hit: %ld\n", hit);
+
+ /* Convert time from usecs to millisecs */
+ do_div(time, USEC_PER_MSEC);
+ if (time)
+ hit /= (long)time;
+ else
+ pr_info("TIME IS ZERO??\n");
+
+ pr_info("Entries per millisec: %ld\n", hit);
+
+ if (hit) {
+ /* Calculate the average time in nanosecs */
+ avg = NSEC_PER_MSEC / hit;
+ pr_info("%ld ns per entry\n", avg);
+ }
+
+ if (missed) {
+ if (time)
+ missed /= (long)time;
+
+ pr_info("Total iterations per millisec: %ld\n", hit + missed);
+
+ /* it is possible that hit + missed will overflow and be zero */
+ if (!(hit + missed)) {
+ pr_info("hit + missed overflowed and totalled zero!\n");
+ hit--; /* make it non zero */
+ }
+
+ /* Caculate the average time in nanosecs */
+ avg = NSEC_PER_MSEC / (hit + missed);
+ pr_info("%ld ns per entry\n", avg);
+ }
+}
+
+static void wait_to_die(void)
+{
+ set_current_state(TASK_INTERRUPTIBLE);
+ while (!kthread_should_stop()) {
+ schedule();
+ set_current_state(TASK_INTERRUPTIBLE);
+ }
+ __set_current_state(TASK_RUNNING);
+}
+
+static int ring_buffer_consumer_thread(void *arg)
+{
+ while (!kthread_should_stop() && !kill_test) {
+ complete(&read_start);
+
+ ring_buffer_consumer();
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (kthread_should_stop() || kill_test)
+ break;
+
+ schedule();
+ __set_current_state(TASK_RUNNING);
+ }
+ __set_current_state(TASK_RUNNING);
+
+ if (kill_test)
+ wait_to_die();
+
+ return 0;
+}
+
+static int ring_buffer_producer_thread(void *arg)
+{
+ init_completion(&read_start);
+
+ while (!kthread_should_stop() && !kill_test) {
+ ring_buffer_reset(buffer);
+
+ if (consumer) {
+ smp_wmb();
+ wake_up_process(consumer);
+ wait_for_completion(&read_start);
+ }
+
+ ring_buffer_producer();
+
+ pr_info("Sleeping for 10 secs\n");
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ * SLEEP_TIME);
+ __set_current_state(TASK_RUNNING);
+ }
+
+ if (kill_test)
+ wait_to_die();
+
+ return 0;
+}
+
+static int __init ring_buffer_benchmark_init(void)
+{
+ int ret;
+
+ /* make a one meg buffer in overwite mode */
+ buffer = ring_buffer_alloc(1000000, RB_FL_OVERWRITE);
+ if (!buffer)
+ return -ENOMEM;
+
+ if (!disable_reader) {
+ consumer = kthread_create(ring_buffer_consumer_thread,
+ NULL, "rb_consumer");
+ ret = PTR_ERR(consumer);
+ if (IS_ERR(consumer))
+ goto out_fail;
+ }
+
+ producer = kthread_run(ring_buffer_producer_thread,
+ NULL, "rb_producer");
+ ret = PTR_ERR(producer);
+
+ if (IS_ERR(producer))
+ goto out_kill;
+
+ return 0;
+
+ out_kill:
+ if (consumer)
+ kthread_stop(consumer);
+
+ out_fail:
+ ring_buffer_free(buffer);
+ return ret;
+}
+
+static void __exit ring_buffer_benchmark_exit(void)
+{
+ kthread_stop(producer);
+ if (consumer)
+ kthread_stop(consumer);
+ ring_buffer_free(buffer);
+}
+
+module_init(ring_buffer_benchmark_init);
+module_exit(ring_buffer_benchmark_exit);
+
+MODULE_AUTHOR("Steven Rostedt");
+MODULE_DESCRIPTION("ring_buffer_benchmark");
+MODULE_LICENSE("GPL");
static DEFINE_PER_CPU(struct trace_array_cpu, global_trace_cpu);
+int filter_current_check_discard(struct ftrace_event_call *call, void *rec,
+ struct ring_buffer_event *event)
+{
+ return filter_check_discard(call, rec, global_trace.buffer, event);
+}
+EXPORT_SYMBOL_GPL(filter_current_check_discard);
+
cycle_t ftrace_now(int cpu)
{
u64 ts;
/* trace_flags holds trace_options default values */
unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
- TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME;
+ TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME |
+ TRACE_ITER_GRAPH_TIME;
/**
* trace_wake_up - wake up tasks waiting for trace input
"latency-format",
"global-clock",
"sleep-time",
+ "graph-time",
NULL
};
return cnt;
}
-static void
-trace_print_seq(struct seq_file *m, struct trace_seq *s)
-{
- int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
-
- s->buffer[len] = 0;
- seq_puts(m, s->buffer);
-
- trace_seq_init(s);
-}
-
/**
* update_max_tr - snapshot all trace buffers from global_trace to max_tr
* @tr: tracer
tracing_reset(tr, cpu);
}
+void tracing_reset_current(int cpu)
+{
+ tracing_reset(&global_trace, cpu);
+}
+
+void tracing_reset_current_online_cpus(void)
+{
+ tracing_reset_online_cpus(&global_trace);
+}
+
#define SAVED_CMDLINES 128
#define NO_CMDLINE_MAP UINT_MAX
static unsigned map_pid_to_cmdline[PID_MAX_DEFAULT+1];
return;
}
+ preempt_disable();
__raw_spin_lock(&trace_cmdline_lock);
map = map_pid_to_cmdline[pid];
if (map != NO_CMDLINE_MAP)
strcpy(comm, "<...>");
__raw_spin_unlock(&trace_cmdline_lock);
+ preempt_enable();
}
void tracing_record_cmdline(struct task_struct *tsk)
}
struct ring_buffer_event *trace_buffer_lock_reserve(struct trace_array *tr,
- unsigned char type,
+ int type,
unsigned long len,
unsigned long flags, int pc)
{
}
struct ring_buffer_event *
-trace_current_buffer_lock_reserve(unsigned char type, unsigned long len,
+trace_current_buffer_lock_reserve(int type, unsigned long len,
unsigned long flags, int pc)
{
return trace_buffer_lock_reserve(&global_trace,
type, len, flags, pc);
}
+EXPORT_SYMBOL_GPL(trace_current_buffer_lock_reserve);
void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
unsigned long flags, int pc)
{
- return __trace_buffer_unlock_commit(&global_trace, event, flags, pc, 1);
+ __trace_buffer_unlock_commit(&global_trace, event, flags, pc, 1);
}
+EXPORT_SYMBOL_GPL(trace_current_buffer_unlock_commit);
void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
unsigned long flags, int pc)
{
- return __trace_buffer_unlock_commit(&global_trace, event, flags, pc, 0);
+ __trace_buffer_unlock_commit(&global_trace, event, flags, pc, 0);
+}
+EXPORT_SYMBOL_GPL(trace_nowake_buffer_unlock_commit);
+
+void trace_current_buffer_discard_commit(struct ring_buffer_event *event)
+{
+ ring_buffer_discard_commit(global_trace.buffer, event);
}
+EXPORT_SYMBOL_GPL(trace_current_buffer_discard_commit);
void
trace_function(struct trace_array *tr,
unsigned long ip, unsigned long parent_ip, unsigned long flags,
int pc)
{
+ struct ftrace_event_call *call = &event_function;
struct ring_buffer_event *event;
struct ftrace_entry *entry;
entry = ring_buffer_event_data(event);
entry->ip = ip;
entry->parent_ip = parent_ip;
- ring_buffer_unlock_commit(tr->buffer, event);
+
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
}
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
unsigned long flags,
int pc)
{
+ struct ftrace_event_call *call = &event_funcgraph_entry;
struct ring_buffer_event *event;
struct ftrace_graph_ent_entry *entry;
return 0;
entry = ring_buffer_event_data(event);
entry->graph_ent = *trace;
- ring_buffer_unlock_commit(global_trace.buffer, event);
+ if (!filter_current_check_discard(call, entry, event))
+ ring_buffer_unlock_commit(global_trace.buffer, event);
return 1;
}
unsigned long flags,
int pc)
{
+ struct ftrace_event_call *call = &event_funcgraph_exit;
struct ring_buffer_event *event;
struct ftrace_graph_ret_entry *entry;
return;
entry = ring_buffer_event_data(event);
entry->ret = *trace;
- ring_buffer_unlock_commit(global_trace.buffer, event);
+ if (!filter_current_check_discard(call, entry, event))
+ ring_buffer_unlock_commit(global_trace.buffer, event);
}
#endif
int skip, int pc)
{
#ifdef CONFIG_STACKTRACE
+ struct ftrace_event_call *call = &event_kernel_stack;
struct ring_buffer_event *event;
struct stack_entry *entry;
struct stack_trace trace;
trace.entries = entry->caller;
save_stack_trace(&trace);
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
#endif
}
unsigned long flags, int pc)
{
#ifdef CONFIG_STACKTRACE
+ struct ftrace_event_call *call = &event_user_stack;
struct ring_buffer_event *event;
struct userstack_entry *entry;
struct stack_trace trace;
trace.entries = entry->caller;
save_stack_trace_user(&trace);
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
#endif
}
struct task_struct *next,
unsigned long flags, int pc)
{
+ struct ftrace_event_call *call = &event_context_switch;
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
entry->next_prio = next->prio;
entry->next_state = next->state;
entry->next_cpu = task_cpu(next);
- trace_buffer_unlock_commit(tr, event, flags, pc);
+
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ trace_buffer_unlock_commit(tr, event, flags, pc);
}
void
struct task_struct *curr,
unsigned long flags, int pc)
{
+ struct ftrace_event_call *call = &event_wakeup;
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
entry->next_state = wakee->state;
entry->next_cpu = task_cpu(wakee);
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
ftrace_trace_stack(tr, flags, 6, pc);
ftrace_trace_userstack(tr, flags, pc);
}
(raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
static u32 trace_buf[TRACE_BUF_SIZE];
+ struct ftrace_event_call *call = &event_bprint;
struct ring_buffer_event *event;
struct trace_array *tr = &global_trace;
struct trace_array_cpu *data;
struct bprint_entry *entry;
unsigned long flags;
+ int disable;
int resched;
int cpu, len = 0, size, pc;
cpu = raw_smp_processor_id();
data = tr->data[cpu];
- if (unlikely(atomic_read(&data->disabled)))
+ disable = atomic_inc_return(&data->disabled);
+ if (unlikely(disable != 1))
goto out;
/* Lockdep uses trace_printk for lock tracing */
entry->fmt = fmt;
memcpy(entry->buf, trace_buf, sizeof(u32) * len);
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
out_unlock:
__raw_spin_unlock(&trace_buf_lock);
local_irq_restore(flags);
out:
+ atomic_dec_return(&data->disabled);
ftrace_preempt_enable(resched);
unpause_graph_tracing();
static raw_spinlock_t trace_buf_lock = __RAW_SPIN_LOCK_UNLOCKED;
static char trace_buf[TRACE_BUF_SIZE];
+ struct ftrace_event_call *call = &event_print;
struct ring_buffer_event *event;
struct trace_array *tr = &global_trace;
struct trace_array_cpu *data;
int cpu, len = 0, size, pc;
struct print_entry *entry;
unsigned long irq_flags;
+ int disable;
if (tracing_disabled || tracing_selftest_running)
return 0;
cpu = raw_smp_processor_id();
data = tr->data[cpu];
- if (unlikely(atomic_read(&data->disabled)))
+ disable = atomic_inc_return(&data->disabled);
+ if (unlikely(disable != 1))
goto out;
pause_graph_tracing();
memcpy(&entry->buf, trace_buf, len);
entry->buf[len] = 0;
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
out_unlock:
__raw_spin_unlock(&trace_buf_lock);
raw_local_irq_restore(irq_flags);
unpause_graph_tracing();
out:
+ atomic_dec_return(&data->disabled);
preempt_enable_notrace();
return len;
p = s_next(m, p, &l);
}
+ trace_event_read_lock();
return p;
}
static void s_stop(struct seq_file *m, void *p)
{
atomic_dec(&trace_record_cmdline_disabled);
+ trace_event_read_unlock();
}
static void print_lat_help_header(struct seq_file *m)
return 1;
}
+/* Called with trace_event_read_lock() held. */
static enum print_line_t print_trace_line(struct trace_iterator *iter)
{
enum print_line_t ret;
.read = tracing_readme_read,
};
+static ssize_t
+tracing_saved_cmdlines_read(struct file *file, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ char *buf_comm;
+ char *file_buf;
+ char *buf;
+ int len = 0;
+ int pid;
+ int i;
+
+ file_buf = kmalloc(SAVED_CMDLINES*(16+TASK_COMM_LEN), GFP_KERNEL);
+ if (!file_buf)
+ return -ENOMEM;
+
+ buf_comm = kmalloc(TASK_COMM_LEN, GFP_KERNEL);
+ if (!buf_comm) {
+ kfree(file_buf);
+ return -ENOMEM;
+ }
+
+ buf = file_buf;
+
+ for (i = 0; i < SAVED_CMDLINES; i++) {
+ int r;
+
+ pid = map_cmdline_to_pid[i];
+ if (pid == -1 || pid == NO_CMDLINE_MAP)
+ continue;
+
+ trace_find_cmdline(pid, buf_comm);
+ r = sprintf(buf, "%d %s\n", pid, buf_comm);
+ buf += r;
+ len += r;
+ }
+
+ len = simple_read_from_buffer(ubuf, cnt, ppos,
+ file_buf, len);
+
+ kfree(file_buf);
+ kfree(buf_comm);
+
+ return len;
+}
+
+static const struct file_operations tracing_saved_cmdlines_fops = {
+ .open = tracing_open_generic,
+ .read = tracing_saved_cmdlines_read,
+};
+
static ssize_t
tracing_ctrl_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
/* trace pipe does not show start of buffer */
cpumask_setall(iter->started);
+ if (trace_flags & TRACE_ITER_LATENCY_FMT)
+ iter->iter_flags |= TRACE_FILE_LAT_FMT;
+
iter->cpu_file = cpu_file;
iter->tr = &global_trace;
mutex_init(&iter->mutex);
offsetof(struct trace_iterator, seq));
iter->pos = -1;
+ trace_event_read_lock();
while (find_next_entry_inc(iter) != NULL) {
enum print_line_t ret;
int len = iter->seq.len;
if (iter->seq.len >= cnt)
break;
}
+ trace_event_read_unlock();
/* Now copy what we have to the user */
sret = trace_seq_to_user(&iter->seq, ubuf, cnt);
goto out_err;
}
+ trace_event_read_lock();
+
/* Fill as many pages as possible. */
for (i = 0, rem = len; i < PIPE_BUFFERS && rem; i++) {
pages[i] = alloc_page(GFP_KERNEL);
trace_seq_init(&iter->seq);
}
+ trace_event_read_unlock();
mutex_unlock(&iter->mutex);
spd.nr_pages = i;
.spd_release = buffer_spd_release,
};
struct buffer_ref *ref;
- int size, i;
+ int entries, size, i;
size_t ret;
if (*ppos & (PAGE_SIZE - 1)) {
len &= PAGE_MASK;
}
- for (i = 0; i < PIPE_BUFFERS && len; i++, len -= PAGE_SIZE) {
+ entries = ring_buffer_entries_cpu(info->tr->buffer, info->cpu);
+
+ for (i = 0; i < PIPE_BUFFERS && len && entries; i++, len -= PAGE_SIZE) {
struct page *page;
int r;
}
r = ring_buffer_read_page(ref->buffer, &ref->page,
- len, info->cpu, 0);
+ len, info->cpu, 1);
if (r < 0) {
ring_buffer_free_read_page(ref->buffer,
ref->page);
spd.partial[i].private = (unsigned long)ref;
spd.nr_pages++;
*ppos += PAGE_SIZE;
+
+ entries = ring_buffer_entries_cpu(info->tr->buffer, info->cpu);
}
spd.nr_pages = i;
.llseek = no_llseek,
};
+static ssize_t
+tracing_stats_read(struct file *filp, char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ unsigned long cpu = (unsigned long)filp->private_data;
+ struct trace_array *tr = &global_trace;
+ struct trace_seq *s;
+ unsigned long cnt;
+
+ s = kmalloc(sizeof(*s), GFP_ATOMIC);
+ if (!s)
+ return ENOMEM;
+
+ trace_seq_init(s);
+
+ cnt = ring_buffer_entries_cpu(tr->buffer, cpu);
+ trace_seq_printf(s, "entries: %ld\n", cnt);
+
+ cnt = ring_buffer_overrun_cpu(tr->buffer, cpu);
+ trace_seq_printf(s, "overrun: %ld\n", cnt);
+
+ cnt = ring_buffer_commit_overrun_cpu(tr->buffer, cpu);
+ trace_seq_printf(s, "commit overrun: %ld\n", cnt);
+
+ cnt = ring_buffer_nmi_dropped_cpu(tr->buffer, cpu);
+ trace_seq_printf(s, "nmi dropped: %ld\n", cnt);
+
+ count = simple_read_from_buffer(ubuf, count, ppos, s->buffer, s->len);
+
+ kfree(s);
+
+ return count;
+}
+
+static const struct file_operations tracing_stats_fops = {
+ .open = tracing_open_generic,
+ .read = tracing_stats_read,
+};
+
#ifdef CONFIG_DYNAMIC_FTRACE
int __weak ftrace_arch_read_dyn_info(char *buf, int size)
static void tracing_init_debugfs_percpu(long cpu)
{
struct dentry *d_percpu = tracing_dentry_percpu();
- struct dentry *entry, *d_cpu;
+ struct dentry *d_cpu;
/* strlen(cpu) + MAX(log10(cpu)) + '\0' */
char cpu_dir[7];
}
/* per cpu trace_pipe */
- entry = debugfs_create_file("trace_pipe", 0444, d_cpu,
- (void *) cpu, &tracing_pipe_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'trace_pipe' entry\n");
+ trace_create_file("trace_pipe", 0444, d_cpu,
+ (void *) cpu, &tracing_pipe_fops);
/* per cpu trace */
- entry = debugfs_create_file("trace", 0644, d_cpu,
- (void *) cpu, &tracing_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'trace' entry\n");
+ trace_create_file("trace", 0644, d_cpu,
+ (void *) cpu, &tracing_fops);
+
+ trace_create_file("trace_pipe_raw", 0444, d_cpu,
+ (void *) cpu, &tracing_buffers_fops);
- entry = debugfs_create_file("trace_pipe_raw", 0444, d_cpu,
- (void *) cpu, &tracing_buffers_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'trace_pipe_raw' entry\n");
+ trace_create_file("stats", 0444, d_cpu,
+ (void *) cpu, &tracing_stats_fops);
}
#ifdef CONFIG_FTRACE_SELFTEST
.write = trace_options_core_write,
};
+struct dentry *trace_create_file(const char *name,
+ mode_t mode,
+ struct dentry *parent,
+ void *data,
+ const struct file_operations *fops)
+{
+ struct dentry *ret;
+
+ ret = debugfs_create_file(name, mode, parent, data, fops);
+ if (!ret)
+ pr_warning("Could not create debugfs '%s' entry\n", name);
+
+ return ret;
+}
+
+
static struct dentry *trace_options_init_dentry(void)
{
struct dentry *d_tracer;
struct tracer_opt *opt)
{
struct dentry *t_options;
- struct dentry *entry;
t_options = trace_options_init_dentry();
if (!t_options)
topt->flags = flags;
topt->opt = opt;
- entry = debugfs_create_file(opt->name, 0644, t_options, topt,
+ topt->entry = trace_create_file(opt->name, 0644, t_options, topt,
&trace_options_fops);
- topt->entry = entry;
-
}
static struct trace_option_dentry *
create_trace_option_core_file(const char *option, long index)
{
struct dentry *t_options;
- struct dentry *entry;
t_options = trace_options_init_dentry();
if (!t_options)
return NULL;
- entry = debugfs_create_file(option, 0644, t_options, (void *)index,
+ return trace_create_file(option, 0644, t_options, (void *)index,
&trace_options_core_fops);
-
- return entry;
}
static __init void create_trace_options_dir(void)
{
struct dentry *t_options;
- struct dentry *entry;
int i;
t_options = trace_options_init_dentry();
if (!t_options)
return;
- for (i = 0; trace_options[i]; i++) {
- entry = create_trace_option_core_file(trace_options[i], i);
- if (!entry)
- pr_warning("Could not create debugfs %s entry\n",
- trace_options[i]);
- }
+ for (i = 0; trace_options[i]; i++)
+ create_trace_option_core_file(trace_options[i], i);
}
static __init int tracer_init_debugfs(void)
{
struct dentry *d_tracer;
- struct dentry *entry;
int cpu;
d_tracer = tracing_init_dentry();
- entry = debugfs_create_file("tracing_enabled", 0644, d_tracer,
- &global_trace, &tracing_ctrl_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'tracing_enabled' entry\n");
+ trace_create_file("tracing_enabled", 0644, d_tracer,
+ &global_trace, &tracing_ctrl_fops);
- entry = debugfs_create_file("trace_options", 0644, d_tracer,
- NULL, &tracing_iter_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'trace_options' entry\n");
+ trace_create_file("trace_options", 0644, d_tracer,
+ NULL, &tracing_iter_fops);
- create_trace_options_dir();
+ trace_create_file("tracing_cpumask", 0644, d_tracer,
+ NULL, &tracing_cpumask_fops);
+
+ trace_create_file("trace", 0644, d_tracer,
+ (void *) TRACE_PIPE_ALL_CPU, &tracing_fops);
- entry = debugfs_create_file("tracing_cpumask", 0644, d_tracer,
- NULL, &tracing_cpumask_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'tracing_cpumask' entry\n");
-
- entry = debugfs_create_file("trace", 0644, d_tracer,
- (void *) TRACE_PIPE_ALL_CPU, &tracing_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'trace' entry\n");
-
- entry = debugfs_create_file("available_tracers", 0444, d_tracer,
- &global_trace, &show_traces_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'available_tracers' entry\n");
-
- entry = debugfs_create_file("current_tracer", 0444, d_tracer,
- &global_trace, &set_tracer_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'current_tracer' entry\n");
-
- entry = debugfs_create_file("tracing_max_latency", 0644, d_tracer,
- &tracing_max_latency,
- &tracing_max_lat_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'tracing_max_latency' entry\n");
-
- entry = debugfs_create_file("tracing_thresh", 0644, d_tracer,
- &tracing_thresh, &tracing_max_lat_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'tracing_thresh' entry\n");
- entry = debugfs_create_file("README", 0644, d_tracer,
- NULL, &tracing_readme_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'README' entry\n");
-
- entry = debugfs_create_file("trace_pipe", 0444, d_tracer,
+ trace_create_file("available_tracers", 0444, d_tracer,
+ &global_trace, &show_traces_fops);
+
+ trace_create_file("current_tracer", 0644, d_tracer,
+ &global_trace, &set_tracer_fops);
+
+ trace_create_file("tracing_max_latency", 0644, d_tracer,
+ &tracing_max_latency, &tracing_max_lat_fops);
+
+ trace_create_file("tracing_thresh", 0644, d_tracer,
+ &tracing_thresh, &tracing_max_lat_fops);
+
+ trace_create_file("README", 0444, d_tracer,
+ NULL, &tracing_readme_fops);
+
+ trace_create_file("trace_pipe", 0444, d_tracer,
(void *) TRACE_PIPE_ALL_CPU, &tracing_pipe_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'trace_pipe' entry\n");
-
- entry = debugfs_create_file("buffer_size_kb", 0644, d_tracer,
- &global_trace, &tracing_entries_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'buffer_size_kb' entry\n");
-
- entry = debugfs_create_file("trace_marker", 0220, d_tracer,
- NULL, &tracing_mark_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'trace_marker' entry\n");
+
+ trace_create_file("buffer_size_kb", 0644, d_tracer,
+ &global_trace, &tracing_entries_fops);
+
+ trace_create_file("trace_marker", 0220, d_tracer,
+ NULL, &tracing_mark_fops);
+
+ trace_create_file("saved_cmdlines", 0444, d_tracer,
+ NULL, &tracing_saved_cmdlines_fops);
#ifdef CONFIG_DYNAMIC_FTRACE
- entry = debugfs_create_file("dyn_ftrace_total_info", 0444, d_tracer,
- &ftrace_update_tot_cnt,
- &tracing_dyn_info_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'dyn_ftrace_total_info' entry\n");
+ trace_create_file("dyn_ftrace_total_info", 0444, d_tracer,
+ &ftrace_update_tot_cnt, &tracing_dyn_info_fops);
#endif
#ifdef CONFIG_SYSPROF_TRACER
init_tracer_sysprof_debugfs(d_tracer);
#endif
+ create_trace_options_dir();
+
for_each_tracing_cpu(cpu)
tracing_init_debugfs_percpu(cpu);
static void __ftrace_dump(bool disable_tracing)
{
- static DEFINE_SPINLOCK(ftrace_dump_lock);
+ static raw_spinlock_t ftrace_dump_lock =
+ (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
/* use static because iter can be a bit big for the stack */
static struct trace_iterator iter;
unsigned int old_userobj;
int cnt = 0, cpu;
/* only one dump */
- spin_lock_irqsave(&ftrace_dump_lock, flags);
+ local_irq_save(flags);
+ __raw_spin_lock(&ftrace_dump_lock);
if (dump_ran)
goto out;
}
out:
- spin_unlock_irqrestore(&ftrace_dump_lock, flags);
+ __raw_spin_unlock(&ftrace_dump_lock);
+ local_irq_restore(flags);
}
/* By default: disable tracing after the dump */
#include <linux/mmiotrace.h>
#include <linux/ftrace.h>
#include <trace/boot.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
#include <trace/power.h>
+#include <linux/trace_seq.h>
+#include <linux/ftrace_event.h>
+
enum trace_type {
__TRACE_FIRST_TYPE = 0,
__TRACE_LAST_TYPE,
};
-/*
- * The trace entry - the most basic unit of tracing. This is what
- * is printed in the end as a single line in the trace output, such as:
- *
- * bash-15816 [01] 235.197585: idle_cpu <- irq_enter
- */
-struct trace_entry {
- unsigned char type;
- unsigned char flags;
- unsigned char preempt_count;
- int pid;
- int tgid;
-};
-
/*
* Function trace entry - function address and parent function addres:
*/
char comm[TASK_COMM_LEN];
};
-struct trace_iterator;
-
/*
* The trace array - an array of per-CPU trace arrays. This is the
* highest level data structure that individual tracers deal with.
__ftrace_bad_type(); \
} while (0)
-/* Return values for print_line callback */
-enum print_line_t {
- TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
- TRACE_TYPE_HANDLED = 1,
- TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */
- TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */
-};
-
-
/*
* An option specific to a tracer. This is a boolean value.
* The bit is the bit index that sets its value on the
struct tracer_stat *stats;
};
-struct trace_seq {
- unsigned char buffer[PAGE_SIZE];
- unsigned int len;
- unsigned int readpos;
-};
-
-static inline void
-trace_seq_init(struct trace_seq *s)
-{
- s->len = 0;
- s->readpos = 0;
-}
-
#define TRACE_PIPE_ALL_CPU -1
-/*
- * Trace iterator - used by printout routines who present trace
- * results to users and which routines might sleep, etc:
- */
-struct trace_iterator {
- struct trace_array *tr;
- struct tracer *trace;
- void *private;
- int cpu_file;
- struct mutex mutex;
- struct ring_buffer_iter *buffer_iter[NR_CPUS];
-
- /* The below is zeroed out in pipe_read */
- struct trace_seq seq;
- struct trace_entry *ent;
- int cpu;
- u64 ts;
-
- unsigned long iter_flags;
- loff_t pos;
- long idx;
-
- cpumask_var_t started;
-};
-
int tracer_init(struct tracer *t, struct trace_array *tr);
int tracing_is_enabled(void);
void trace_wake_up(void);
void tracing_reset(struct trace_array *tr, int cpu);
void tracing_reset_online_cpus(struct trace_array *tr);
+void tracing_reset_current(int cpu);
+void tracing_reset_current_online_cpus(void);
int tracing_open_generic(struct inode *inode, struct file *filp);
+struct dentry *trace_create_file(const char *name,
+ mode_t mode,
+ struct dentry *parent,
+ void *data,
+ const struct file_operations *fops);
+
struct dentry *tracing_init_dentry(void);
void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
struct ring_buffer_event;
struct ring_buffer_event *trace_buffer_lock_reserve(struct trace_array *tr,
- unsigned char type,
+ int type,
unsigned long len,
unsigned long flags,
int pc);
struct ring_buffer_event *event,
unsigned long flags, int pc);
-struct ring_buffer_event *
-trace_current_buffer_lock_reserve(unsigned char type, unsigned long len,
- unsigned long flags, int pc);
-void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
- unsigned long flags, int pc);
-void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
- unsigned long flags, int pc);
-
struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
struct trace_array_cpu *data);
struct task_struct *prev,
struct task_struct *next,
unsigned long flags, int pc);
-void tracing_record_cmdline(struct task_struct *tsk);
void tracing_sched_wakeup_trace(struct trace_array *tr,
struct task_struct *wakee,
struct trace_array *tr);
extern int trace_selftest_startup_branch(struct tracer *trace,
struct trace_array *tr);
+extern int trace_selftest_startup_hw_branches(struct tracer *trace,
+ struct trace_array *tr);
#endif /* CONFIG_FTRACE_STARTUP_TEST */
extern void *head_page(struct trace_array_cpu *data);
/* Standard output formatting function used for function return traces */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
extern enum print_line_t print_graph_function(struct trace_iterator *iter);
+extern enum print_line_t
+trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
#ifdef CONFIG_DYNAMIC_FTRACE
/* TODO: make this variable */
return 1;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
-
#else /* CONFIG_FUNCTION_GRAPH_TRACER */
static inline enum print_line_t
print_graph_function(struct trace_iterator *iter)
TRACE_ITER_LATENCY_FMT = 0x40000,
TRACE_ITER_GLOBAL_CLK = 0x80000,
TRACE_ITER_SLEEP_TIME = 0x100000,
+ TRACE_ITER_GRAPH_TIME = 0x200000,
};
/*
char *type;
int offset;
int size;
+ int is_signed;
};
-struct ftrace_event_call {
- char *name;
- char *system;
- struct dentry *dir;
- int enabled;
- int (*regfunc)(void);
- void (*unregfunc)(void);
- int id;
- int (*raw_init)(void);
- int (*show_format)(struct trace_seq *s);
- int (*define_fields)(void);
- struct list_head fields;
+struct event_filter {
+ int n_preds;
struct filter_pred **preds;
-
-#ifdef CONFIG_EVENT_PROFILE
- atomic_t profile_count;
- int (*profile_enable)(struct ftrace_event_call *);
- void (*profile_disable)(struct ftrace_event_call *);
-#endif
+ char *filter_string;
};
struct event_subsystem {
struct list_head list;
const char *name;
struct dentry *entry;
- struct filter_pred **preds;
+ void *filter;
};
-#define events_for_each(event) \
- for (event = __start_ftrace_events; \
- (unsigned long)event < (unsigned long)__stop_ftrace_events; \
- event++)
-
-#define MAX_FILTER_PRED 8
-
struct filter_pred;
-typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event);
+typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event,
+ int val1, int val2);
struct filter_pred {
filter_pred_fn_t fn;
u64 val;
- char *str_val;
+ char str_val[MAX_FILTER_STR_VAL];
int str_len;
char *field_name;
int offset;
int not;
- int or;
- int compound;
- int clear;
+ int op;
+ int pop_n;
};
-int trace_define_field(struct ftrace_event_call *call, char *type,
- char *name, int offset, int size);
-extern void filter_free_pred(struct filter_pred *pred);
-extern void filter_print_preds(struct filter_pred **preds,
+extern void print_event_filter(struct ftrace_event_call *call,
struct trace_seq *s);
-extern int filter_parse(char **pbuf, struct filter_pred *pred);
-extern int filter_add_pred(struct ftrace_event_call *call,
- struct filter_pred *pred);
-extern void filter_free_preds(struct ftrace_event_call *call);
-extern int filter_match_preds(struct ftrace_event_call *call, void *rec);
-extern void filter_free_subsystem_preds(struct event_subsystem *system);
-extern int filter_add_subsystem_pred(struct event_subsystem *system,
- struct filter_pred *pred);
-
-void event_trace_printk(unsigned long ip, const char *fmt, ...);
-extern struct ftrace_event_call __start_ftrace_events[];
-extern struct ftrace_event_call __stop_ftrace_events[];
-
-#define for_each_event(event) \
- for (event = __start_ftrace_events; \
- (unsigned long)event < (unsigned long)__stop_ftrace_events; \
- event++)
+extern int apply_event_filter(struct ftrace_event_call *call,
+ char *filter_string);
+extern int apply_subsystem_event_filter(struct event_subsystem *system,
+ char *filter_string);
+extern void print_subsystem_event_filter(struct event_subsystem *system,
+ struct trace_seq *s);
+
+static inline int
+filter_check_discard(struct ftrace_event_call *call, void *rec,
+ struct ring_buffer *buffer,
+ struct ring_buffer_event *event)
+{
+ if (unlikely(call->filter_active) && !filter_match_preds(call, rec)) {
+ ring_buffer_discard_commit(buffer, event);
+ return 1;
+ }
+
+ return 0;
+}
+
+#define DEFINE_COMPARISON_PRED(type) \
+static int filter_pred_##type(struct filter_pred *pred, void *event, \
+ int val1, int val2) \
+{ \
+ type *addr = (type *)(event + pred->offset); \
+ type val = (type)pred->val; \
+ int match = 0; \
+ \
+ switch (pred->op) { \
+ case OP_LT: \
+ match = (*addr < val); \
+ break; \
+ case OP_LE: \
+ match = (*addr <= val); \
+ break; \
+ case OP_GT: \
+ match = (*addr > val); \
+ break; \
+ case OP_GE: \
+ match = (*addr >= val); \
+ break; \
+ default: \
+ break; \
+ } \
+ \
+ return match; \
+}
+
+#define DEFINE_EQUALITY_PRED(size) \
+static int filter_pred_##size(struct filter_pred *pred, void *event, \
+ int val1, int val2) \
+{ \
+ u##size *addr = (u##size *)(event + pred->offset); \
+ u##size val = (u##size)pred->val; \
+ int match; \
+ \
+ match = (val == *addr) ^ pred->not; \
+ \
+ return match; \
+}
+
+extern struct mutex event_mutex;
+extern struct list_head ftrace_events;
extern const char *__start___trace_bprintk_fmt[];
extern const char *__stop___trace_bprintk_fmt[];
-/*
- * The double __builtin_constant_p is because gcc will give us an error
- * if we try to allocate the static variable to fmt if it is not a
- * constant. Even with the outer if statement optimizing out.
- */
-#define event_trace_printk(ip, fmt, args...) \
-do { \
- __trace_printk_check_format(fmt, ##args); \
- tracing_record_cmdline(current); \
- if (__builtin_constant_p(fmt)) { \
- static const char *trace_printk_fmt \
- __attribute__((section("__trace_printk_fmt"))) = \
- __builtin_constant_p(fmt) ? fmt : NULL; \
- \
- __trace_bprintk(ip, trace_printk_fmt, ##args); \
- } else \
- __trace_printk(ip, fmt, ##args); \
-} while (0)
+#undef TRACE_EVENT_FORMAT
+#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
+ extern struct ftrace_event_call event_##call;
+#undef TRACE_EVENT_FORMAT_NOFILTER
+#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, tpfmt)
+#include "trace_event_types.h"
#endif /* _LINUX_KERNEL_TRACE_H */
#include <linux/debugfs.h>
#include <linux/ftrace.h>
#include <linux/kallsyms.h>
+#include <linux/time.h>
#include "trace.h"
#include "trace_output.h"
trace_assign_type(field, entry);
call = &field->boot_call;
ts = iter->ts;
- nsec_rem = do_div(ts, 1000000000);
+ nsec_rem = do_div(ts, NSEC_PER_SEC);
ret = trace_seq_printf(s, "[%5ld.%09ld] calling %s @ %i\n",
(unsigned long)ts, nsec_rem, call->func, call->caller);
trace_assign_type(field, entry);
init_ret = &field->boot_ret;
ts = iter->ts;
- nsec_rem = do_div(ts, 1000000000);
+ nsec_rem = do_div(ts, NSEC_PER_SEC);
ret = trace_seq_printf(s, "[%5ld.%09ld] initcall %s "
"returned %d after %llu msecs\n",
static void
probe_likely_condition(struct ftrace_branch_data *f, int val, int expect)
{
+ struct ftrace_event_call *call = &event_branch;
struct trace_array *tr = branch_tracer;
struct ring_buffer_event *event;
struct trace_branch *entry;
entry->line = f->line;
entry->correct = val == expect;
- ring_buffer_unlock_commit(tr->buffer, event);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ ring_buffer_unlock_commit(tr->buffer, event);
out:
atomic_dec(&tr->data[cpu]->disabled);
return 0;
}
-static void *annotated_branch_stat_start(void)
+static void *annotated_branch_stat_start(struct tracer_stat *trace)
{
return __start_annotated_branch_profile;
}
return 0;
}
-static void *all_branch_stat_start(void)
+static void *all_branch_stat_start(struct tracer_stat *trace)
{
return __start_branch_profile;
}
int ftrace_profile_enable(int event_id)
{
struct ftrace_event_call *event;
+ int ret = -EINVAL;
- for_each_event(event) {
- if (event->id == event_id)
- return event->profile_enable(event);
+ mutex_lock(&event_mutex);
+ list_for_each_entry(event, &ftrace_events, list) {
+ if (event->id == event_id) {
+ ret = event->profile_enable(event);
+ break;
+ }
}
+ mutex_unlock(&event_mutex);
- return -EINVAL;
+ return ret;
}
void ftrace_profile_disable(int event_id)
{
struct ftrace_event_call *event;
- for_each_event(event) {
- if (event->id == event_id)
- return event->profile_disable(event);
+ mutex_lock(&event_mutex);
+ list_for_each_entry(event, &ftrace_events, list) {
+ if (event->id == event_id) {
+ event->profile_disable(event);
+ break;
+ }
}
+ mutex_unlock(&event_mutex);
}
-
TP_RAW_FMT("%u:%u:%u ==+ %u:%u:%u [%03u]")
);
-TRACE_EVENT_FORMAT(special, TRACE_SPECIAL, special_entry, ignore,
+TRACE_EVENT_FORMAT_NOFILTER(special, TRACE_SPECIAL, special_entry, ignore,
TRACE_STRUCT(
TRACE_FIELD(unsigned long, arg1, arg1)
TRACE_FIELD(unsigned long, arg2, arg2)
TRACE_EVENT_FORMAT(branch, TRACE_BRANCH, trace_branch, ignore,
TRACE_STRUCT(
TRACE_FIELD(unsigned int, line, line)
- TRACE_FIELD_SPECIAL(char func[TRACE_FUNC_SIZE+1], func, func)
- TRACE_FIELD_SPECIAL(char file[TRACE_FUNC_SIZE+1], file, file)
+ TRACE_FIELD_SPECIAL(char func[TRACE_FUNC_SIZE+1], func,
+ TRACE_FUNC_SIZE+1, func)
+ TRACE_FIELD_SPECIAL(char file[TRACE_FUNC_SIZE+1], file,
+ TRACE_FUNC_SIZE+1, file)
TRACE_FIELD(char, correct, correct)
),
TP_RAW_FMT("%u:%s:%s (%u)")
TRACE_EVENT_FORMAT(power, TRACE_POWER, trace_power, ignore,
TRACE_STRUCT(
- TRACE_FIELD(ktime_t, state_data.stamp, stamp)
- TRACE_FIELD(ktime_t, state_data.end, end)
+ TRACE_FIELD_SIGN(ktime_t, state_data.stamp, stamp, 1)
+ TRACE_FIELD_SIGN(ktime_t, state_data.end, end, 1)
TRACE_FIELD(int, state_data.type, type)
TRACE_FIELD(int, state_data.state, state)
),
*
*/
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#include <linux/kthread.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/ctype.h>
+#include <linux/delay.h>
#include "trace_output.h"
#define TRACE_SYSTEM "TRACE_SYSTEM"
-static DEFINE_MUTEX(event_mutex);
+DEFINE_MUTEX(event_mutex);
+
+LIST_HEAD(ftrace_events);
int trace_define_field(struct ftrace_event_call *call, char *type,
- char *name, int offset, int size)
+ char *name, int offset, int size, int is_signed)
{
struct ftrace_event_field *field;
field->offset = offset;
field->size = size;
+ field->is_signed = is_signed;
list_add(&field->link, &call->fields);
return 0;
return -ENOMEM;
}
+EXPORT_SYMBOL_GPL(trace_define_field);
-static void ftrace_clear_events(void)
-{
- struct ftrace_event_call *call = (void *)__start_ftrace_events;
-
+#ifdef CONFIG_MODULES
- while ((unsigned long)call < (unsigned long)__stop_ftrace_events) {
+static void trace_destroy_fields(struct ftrace_event_call *call)
+{
+ struct ftrace_event_field *field, *next;
- if (call->enabled) {
- call->enabled = 0;
- call->unregfunc();
- }
- call++;
+ list_for_each_entry_safe(field, next, &call->fields, link) {
+ list_del(&field->link);
+ kfree(field->type);
+ kfree(field->name);
+ kfree(field);
}
}
+#endif /* CONFIG_MODULES */
+
static void ftrace_event_enable_disable(struct ftrace_event_call *call,
int enable)
{
-
switch (enable) {
case 0:
if (call->enabled) {
call->enabled = 0;
+ tracing_stop_cmdline_record();
call->unregfunc();
}
break;
case 1:
if (!call->enabled) {
call->enabled = 1;
+ tracing_start_cmdline_record();
call->regfunc();
}
break;
}
}
+static void ftrace_clear_events(void)
+{
+ struct ftrace_event_call *call;
+
+ mutex_lock(&event_mutex);
+ list_for_each_entry(call, &ftrace_events, list) {
+ ftrace_event_enable_disable(call, 0);
+ }
+ mutex_unlock(&event_mutex);
+}
+
+/*
+ * __ftrace_set_clr_event(NULL, NULL, NULL, set) will set/unset all events.
+ */
+static int __ftrace_set_clr_event(const char *match, const char *sub,
+ const char *event, int set)
+{
+ struct ftrace_event_call *call;
+ int ret = -EINVAL;
+
+ mutex_lock(&event_mutex);
+ list_for_each_entry(call, &ftrace_events, list) {
+
+ if (!call->name || !call->regfunc)
+ continue;
+
+ if (match &&
+ strcmp(match, call->name) != 0 &&
+ strcmp(match, call->system) != 0)
+ continue;
+
+ if (sub && strcmp(sub, call->system) != 0)
+ continue;
+
+ if (event && strcmp(event, call->name) != 0)
+ continue;
+
+ ftrace_event_enable_disable(call, set);
+
+ ret = 0;
+ }
+ mutex_unlock(&event_mutex);
+
+ return ret;
+}
+
static int ftrace_set_clr_event(char *buf, int set)
{
- struct ftrace_event_call *call = __start_ftrace_events;
char *event = NULL, *sub = NULL, *match;
- int ret = -EINVAL;
/*
* The buf format can be <subsystem>:<event-name>
event = NULL;
}
- mutex_lock(&event_mutex);
- for_each_event(call) {
-
- if (!call->name || !call->regfunc)
- continue;
-
- if (match &&
- strcmp(match, call->name) != 0 &&
- strcmp(match, call->system) != 0)
- continue;
-
- if (sub && strcmp(sub, call->system) != 0)
- continue;
-
- if (event && strcmp(event, call->name) != 0)
- continue;
-
- ftrace_event_enable_disable(call, set);
-
- ret = 0;
- }
- mutex_unlock(&event_mutex);
+ return __ftrace_set_clr_event(match, sub, event, set);
+}
- return ret;
+/**
+ * trace_set_clr_event - enable or disable an event
+ * @system: system name to match (NULL for any system)
+ * @event: event name to match (NULL for all events, within system)
+ * @set: 1 to enable, 0 to disable
+ *
+ * This is a way for other parts of the kernel to enable or disable
+ * event recording.
+ *
+ * Returns 0 on success, -EINVAL if the parameters do not match any
+ * registered events.
+ */
+int trace_set_clr_event(const char *system, const char *event, int set)
+{
+ return __ftrace_set_clr_event(NULL, system, event, set);
}
/* 128 should be much more than enough */
static void *
t_next(struct seq_file *m, void *v, loff_t *pos)
{
- struct ftrace_event_call *call = m->private;
- struct ftrace_event_call *next = call;
+ struct list_head *list = m->private;
+ struct ftrace_event_call *call;
(*pos)++;
for (;;) {
- if ((unsigned long)call >= (unsigned long)__stop_ftrace_events)
+ if (list == &ftrace_events)
return NULL;
+ call = list_entry(list, struct ftrace_event_call, list);
+
/*
* The ftrace subsystem is for showing formats only.
* They can not be enabled or disabled via the event files.
if (call->regfunc)
break;
- call++;
- next = call;
+ list = list->next;
}
- m->private = ++next;
+ m->private = list->next;
return call;
}
static void *t_start(struct seq_file *m, loff_t *pos)
{
+ mutex_lock(&event_mutex);
+ if (*pos == 0)
+ m->private = ftrace_events.next;
return t_next(m, NULL, pos);
}
static void *
s_next(struct seq_file *m, void *v, loff_t *pos)
{
- struct ftrace_event_call *call = m->private;
- struct ftrace_event_call *next;
+ struct list_head *list = m->private;
+ struct ftrace_event_call *call;
(*pos)++;
retry:
- if ((unsigned long)call >= (unsigned long)__stop_ftrace_events)
+ if (list == &ftrace_events)
return NULL;
+ call = list_entry(list, struct ftrace_event_call, list);
+
if (!call->enabled) {
- call++;
+ list = list->next;
goto retry;
}
- next = call;
- m->private = ++next;
+ m->private = list->next;
return call;
}
static void *s_start(struct seq_file *m, loff_t *pos)
{
+ mutex_lock(&event_mutex);
+ if (*pos == 0)
+ m->private = ftrace_events.next;
return s_next(m, NULL, pos);
}
static void t_stop(struct seq_file *m, void *p)
{
+ mutex_unlock(&event_mutex);
}
static int
ftrace_event_seq_open(struct inode *inode, struct file *file)
{
- int ret;
const struct seq_operations *seq_ops;
if ((file->f_mode & FMODE_WRITE) &&
ftrace_clear_events();
seq_ops = inode->i_private;
- ret = seq_open(file, seq_ops);
- if (!ret) {
- struct seq_file *m = file->private_data;
-
- m->private = __start_ftrace_events;
- }
- return ret;
+ return seq_open(file, seq_ops);
}
static ssize_t
return cnt;
}
+static ssize_t
+system_enable_read(struct file *filp, char __user *ubuf, size_t cnt,
+ loff_t *ppos)
+{
+ const char set_to_char[4] = { '?', '0', '1', 'X' };
+ const char *system = filp->private_data;
+ struct ftrace_event_call *call;
+ char buf[2];
+ int set = 0;
+ int ret;
+
+ mutex_lock(&event_mutex);
+ list_for_each_entry(call, &ftrace_events, list) {
+ if (!call->name || !call->regfunc)
+ continue;
+
+ if (system && strcmp(call->system, system) != 0)
+ continue;
+
+ /*
+ * We need to find out if all the events are set
+ * or if all events or cleared, or if we have
+ * a mixture.
+ */
+ set |= (1 << !!call->enabled);
+
+ /*
+ * If we have a mixture, no need to look further.
+ */
+ if (set == 3)
+ break;
+ }
+ mutex_unlock(&event_mutex);
+
+ buf[0] = set_to_char[set];
+ buf[1] = '\n';
+
+ ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, 2);
+
+ return ret;
+}
+
+static ssize_t
+system_enable_write(struct file *filp, const char __user *ubuf, size_t cnt,
+ loff_t *ppos)
+{
+ const char *system = filp->private_data;
+ unsigned long val;
+ char buf[64];
+ ssize_t ret;
+
+ if (cnt >= sizeof(buf))
+ return -EINVAL;
+
+ if (copy_from_user(&buf, ubuf, cnt))
+ return -EFAULT;
+
+ buf[cnt] = 0;
+
+ ret = strict_strtoul(buf, 10, &val);
+ if (ret < 0)
+ return ret;
+
+ ret = tracing_update_buffers();
+ if (ret < 0)
+ return ret;
+
+ if (val != 0 && val != 1)
+ return -EINVAL;
+
+ ret = __ftrace_set_clr_event(NULL, system, NULL, val);
+ if (ret)
+ goto out;
+
+ ret = cnt;
+
+out:
+ *ppos += cnt;
+
+ return ret;
+}
+
+extern char *__bad_type_size(void);
+
#undef FIELD
#define FIELD(type, name) \
+ sizeof(type) != sizeof(field.name) ? __bad_type_size() : \
#type, "common_" #name, offsetof(typeof(field), name), \
sizeof(field.name)
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\n",
- FIELD(unsigned char, type),
+ FIELD(unsigned short, type),
FIELD(unsigned char, flags),
FIELD(unsigned char, preempt_count),
FIELD(int, pid),
trace_seq_init(s);
- filter_print_preds(call->preds, s);
+ print_event_filter(call, s);
r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len);
kfree(s);
loff_t *ppos)
{
struct ftrace_event_call *call = filp->private_data;
- char buf[64], *pbuf = buf;
- struct filter_pred *pred;
+ char *buf;
int err;
- if (cnt >= sizeof(buf))
+ if (cnt >= PAGE_SIZE)
return -EINVAL;
- if (copy_from_user(&buf, ubuf, cnt))
- return -EFAULT;
- buf[cnt] = '\0';
-
- pred = kzalloc(sizeof(*pred), GFP_KERNEL);
- if (!pred)
+ buf = (char *)__get_free_page(GFP_TEMPORARY);
+ if (!buf)
return -ENOMEM;
- err = filter_parse(&pbuf, pred);
- if (err < 0) {
- filter_free_pred(pred);
- return err;
- }
-
- if (pred->clear) {
- filter_free_preds(call);
- filter_free_pred(pred);
- return cnt;
+ if (copy_from_user(buf, ubuf, cnt)) {
+ free_page((unsigned long) buf);
+ return -EFAULT;
}
+ buf[cnt] = '\0';
- err = filter_add_pred(call, pred);
- if (err < 0) {
- filter_free_pred(pred);
+ err = apply_event_filter(call, buf);
+ free_page((unsigned long) buf);
+ if (err < 0)
return err;
- }
*ppos += cnt;
trace_seq_init(s);
- filter_print_preds(system->preds, s);
+ print_subsystem_event_filter(system, s);
r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len);
kfree(s);
loff_t *ppos)
{
struct event_subsystem *system = filp->private_data;
- char buf[64], *pbuf = buf;
- struct filter_pred *pred;
+ char *buf;
int err;
- if (cnt >= sizeof(buf))
+ if (cnt >= PAGE_SIZE)
return -EINVAL;
- if (copy_from_user(&buf, ubuf, cnt))
- return -EFAULT;
- buf[cnt] = '\0';
-
- pred = kzalloc(sizeof(*pred), GFP_KERNEL);
- if (!pred)
+ buf = (char *)__get_free_page(GFP_TEMPORARY);
+ if (!buf)
return -ENOMEM;
- err = filter_parse(&pbuf, pred);
- if (err < 0) {
- filter_free_pred(pred);
- return err;
- }
-
- if (pred->clear) {
- filter_free_subsystem_preds(system);
- filter_free_pred(pred);
- return cnt;
+ if (copy_from_user(buf, ubuf, cnt)) {
+ free_page((unsigned long) buf);
+ return -EFAULT;
}
+ buf[cnt] = '\0';
- err = filter_add_subsystem_pred(system, pred);
- if (err < 0) {
- filter_free_subsystem_preds(system);
- filter_free_pred(pred);
+ err = apply_subsystem_event_filter(system, buf);
+ free_page((unsigned long) buf);
+ if (err < 0)
return err;
- }
*ppos += cnt;
return cnt;
}
+static ssize_t
+show_header(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos)
+{
+ int (*func)(struct trace_seq *s) = filp->private_data;
+ struct trace_seq *s;
+ int r;
+
+ if (*ppos)
+ return 0;
+
+ s = kmalloc(sizeof(*s), GFP_KERNEL);
+ if (!s)
+ return -ENOMEM;
+
+ trace_seq_init(s);
+
+ func(s);
+ r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len);
+
+ kfree(s);
+
+ return r;
+}
+
static const struct seq_operations show_event_seq_ops = {
.start = t_start,
.next = t_next,
.write = subsystem_filter_write,
};
+static const struct file_operations ftrace_system_enable_fops = {
+ .open = tracing_open_generic,
+ .read = system_enable_read,
+ .write = system_enable_write,
+};
+
+static const struct file_operations ftrace_show_header_fops = {
+ .open = tracing_open_generic,
+ .read = show_header,
+};
+
static struct dentry *event_trace_events_dir(void)
{
static struct dentry *d_tracer;
event_subsystem_dir(const char *name, struct dentry *d_events)
{
struct event_subsystem *system;
+ struct dentry *entry;
/* First see if we did not already create this dir */
list_for_each_entry(system, &event_subsystems, list) {
return d_events;
}
- system->name = name;
+ system->name = kstrdup(name, GFP_KERNEL);
+ if (!system->name) {
+ debugfs_remove(system->entry);
+ kfree(system);
+ return d_events;
+ }
+
list_add(&system->list, &event_subsystems);
- system->preds = NULL;
+ system->filter = NULL;
+
+ system->filter = kzalloc(sizeof(struct event_filter), GFP_KERNEL);
+ if (!system->filter) {
+ pr_warning("Could not allocate filter for subsystem "
+ "'%s'\n", name);
+ return system->entry;
+ }
+
+ entry = debugfs_create_file("filter", 0644, system->entry, system,
+ &ftrace_subsystem_filter_fops);
+ if (!entry) {
+ kfree(system->filter);
+ system->filter = NULL;
+ pr_warning("Could not create debugfs "
+ "'%s/filter' entry\n", name);
+ }
+
+ entry = trace_create_file("enable", 0644, system->entry,
+ (void *)system->name,
+ &ftrace_system_enable_fops);
return system->entry;
}
static int
-event_create_dir(struct ftrace_event_call *call, struct dentry *d_events)
+event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
+ const struct file_operations *id,
+ const struct file_operations *enable,
+ const struct file_operations *filter,
+ const struct file_operations *format)
{
struct dentry *entry;
int ret;
* If the trace point header did not define TRACE_SYSTEM
* then the system would be called "TRACE_SYSTEM".
*/
- if (strcmp(call->system, "TRACE_SYSTEM") != 0)
+ if (strcmp(call->system, TRACE_SYSTEM) != 0)
d_events = event_subsystem_dir(call->system, d_events);
if (call->raw_init) {
return -1;
}
- if (call->regfunc) {
- entry = debugfs_create_file("enable", 0644, call->dir, call,
- &ftrace_enable_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'%s/enable' entry\n", call->name);
- }
+ if (call->regfunc)
+ entry = trace_create_file("enable", 0644, call->dir, call,
+ enable);
- if (call->id) {
- entry = debugfs_create_file("id", 0444, call->dir, call,
- &ftrace_event_id_fops);
- if (!entry)
- pr_warning("Could not create debugfs '%s/id' entry\n",
- call->name);
- }
+ if (call->id)
+ entry = trace_create_file("id", 0444, call->dir, call,
+ id);
if (call->define_fields) {
ret = call->define_fields();
" events/%s\n", call->name);
return ret;
}
- entry = debugfs_create_file("filter", 0644, call->dir, call,
- &ftrace_event_filter_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'%s/filter' entry\n", call->name);
+ entry = trace_create_file("filter", 0644, call->dir, call,
+ filter);
}
/* A trace may not want to export its format */
if (!call->show_format)
return 0;
- entry = debugfs_create_file("format", 0444, call->dir, call,
- &ftrace_event_format_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'%s/format' entry\n", call->name);
+ entry = trace_create_file("format", 0444, call->dir, call,
+ format);
+
+ return 0;
+}
+
+#define for_each_event(event, start, end) \
+ for (event = start; \
+ (unsigned long)event < (unsigned long)end; \
+ event++)
+
+#ifdef CONFIG_MODULES
+
+static LIST_HEAD(ftrace_module_file_list);
+
+/*
+ * Modules must own their file_operations to keep up with
+ * reference counting.
+ */
+struct ftrace_module_file_ops {
+ struct list_head list;
+ struct module *mod;
+ struct file_operations id;
+ struct file_operations enable;
+ struct file_operations format;
+ struct file_operations filter;
+};
+
+static struct ftrace_module_file_ops *
+trace_create_file_ops(struct module *mod)
+{
+ struct ftrace_module_file_ops *file_ops;
+
+ /*
+ * This is a bit of a PITA. To allow for correct reference
+ * counting, modules must "own" their file_operations.
+ * To do this, we allocate the file operations that will be
+ * used in the event directory.
+ */
+
+ file_ops = kmalloc(sizeof(*file_ops), GFP_KERNEL);
+ if (!file_ops)
+ return NULL;
+
+ file_ops->mod = mod;
+
+ file_ops->id = ftrace_event_id_fops;
+ file_ops->id.owner = mod;
+
+ file_ops->enable = ftrace_enable_fops;
+ file_ops->enable.owner = mod;
+
+ file_ops->filter = ftrace_event_filter_fops;
+ file_ops->filter.owner = mod;
+
+ file_ops->format = ftrace_event_format_fops;
+ file_ops->format.owner = mod;
+
+ list_add(&file_ops->list, &ftrace_module_file_list);
+
+ return file_ops;
+}
+
+static void trace_module_add_events(struct module *mod)
+{
+ struct ftrace_module_file_ops *file_ops = NULL;
+ struct ftrace_event_call *call, *start, *end;
+ struct dentry *d_events;
+
+ start = mod->trace_events;
+ end = mod->trace_events + mod->num_trace_events;
+
+ if (start == end)
+ return;
+
+ d_events = event_trace_events_dir();
+ if (!d_events)
+ return;
+
+ for_each_event(call, start, end) {
+ /* The linker may leave blanks */
+ if (!call->name)
+ continue;
+
+ /*
+ * This module has events, create file ops for this module
+ * if not already done.
+ */
+ if (!file_ops) {
+ file_ops = trace_create_file_ops(mod);
+ if (!file_ops)
+ return;
+ }
+ call->mod = mod;
+ list_add(&call->list, &ftrace_events);
+ event_create_dir(call, d_events,
+ &file_ops->id, &file_ops->enable,
+ &file_ops->filter, &file_ops->format);
+ }
+}
+
+static void trace_module_remove_events(struct module *mod)
+{
+ struct ftrace_module_file_ops *file_ops;
+ struct ftrace_event_call *call, *p;
+ bool found = false;
+
+ down_write(&trace_event_mutex);
+ list_for_each_entry_safe(call, p, &ftrace_events, list) {
+ if (call->mod == mod) {
+ found = true;
+ ftrace_event_enable_disable(call, 0);
+ if (call->event)
+ __unregister_ftrace_event(call->event);
+ debugfs_remove_recursive(call->dir);
+ list_del(&call->list);
+ trace_destroy_fields(call);
+ destroy_preds(call);
+ }
+ }
+
+ /* Now free the file_operations */
+ list_for_each_entry(file_ops, &ftrace_module_file_list, list) {
+ if (file_ops->mod == mod)
+ break;
+ }
+ if (&file_ops->list != &ftrace_module_file_list) {
+ list_del(&file_ops->list);
+ kfree(file_ops);
+ }
+
+ /*
+ * It is safest to reset the ring buffer if the module being unloaded
+ * registered any events.
+ */
+ if (found)
+ tracing_reset_current_online_cpus();
+ up_write(&trace_event_mutex);
+}
+
+static int trace_module_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ struct module *mod = data;
+
+ mutex_lock(&event_mutex);
+ switch (val) {
+ case MODULE_STATE_COMING:
+ trace_module_add_events(mod);
+ break;
+ case MODULE_STATE_GOING:
+ trace_module_remove_events(mod);
+ break;
+ }
+ mutex_unlock(&event_mutex);
return 0;
}
+#else
+static int trace_module_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ return 0;
+}
+#endif /* CONFIG_MODULES */
+
+struct notifier_block trace_module_nb = {
+ .notifier_call = trace_module_notify,
+ .priority = 0,
+};
+
+extern struct ftrace_event_call __start_ftrace_events[];
+extern struct ftrace_event_call __stop_ftrace_events[];
static __init int event_trace_init(void)
{
- struct ftrace_event_call *call = __start_ftrace_events;
+ struct ftrace_event_call *call;
struct dentry *d_tracer;
struct dentry *entry;
struct dentry *d_events;
+ int ret;
d_tracer = tracing_init_dentry();
if (!d_tracer)
if (!d_events)
return 0;
- for_each_event(call) {
+ /* ring buffer internal formats */
+ trace_create_file("header_page", 0444, d_events,
+ ring_buffer_print_page_header,
+ &ftrace_show_header_fops);
+
+ trace_create_file("header_event", 0444, d_events,
+ ring_buffer_print_entry_header,
+ &ftrace_show_header_fops);
+
+ trace_create_file("enable", 0644, d_events,
+ NULL, &ftrace_system_enable_fops);
+
+ for_each_event(call, __start_ftrace_events, __stop_ftrace_events) {
/* The linker may leave blanks */
if (!call->name)
continue;
- event_create_dir(call, d_events);
+ list_add(&call->list, &ftrace_events);
+ event_create_dir(call, d_events, &ftrace_event_id_fops,
+ &ftrace_enable_fops, &ftrace_event_filter_fops,
+ &ftrace_event_format_fops);
}
+ ret = register_module_notifier(&trace_module_nb);
+ if (ret)
+ pr_warning("Failed to register trace events module notifier\n");
+
return 0;
}
fs_initcall(event_trace_init);
+
+#ifdef CONFIG_FTRACE_STARTUP_TEST
+
+static DEFINE_SPINLOCK(test_spinlock);
+static DEFINE_SPINLOCK(test_spinlock_irq);
+static DEFINE_MUTEX(test_mutex);
+
+static __init void test_work(struct work_struct *dummy)
+{
+ spin_lock(&test_spinlock);
+ spin_lock_irq(&test_spinlock_irq);
+ udelay(1);
+ spin_unlock_irq(&test_spinlock_irq);
+ spin_unlock(&test_spinlock);
+
+ mutex_lock(&test_mutex);
+ msleep(1);
+ mutex_unlock(&test_mutex);
+}
+
+static __init int event_test_thread(void *unused)
+{
+ void *test_malloc;
+
+ test_malloc = kmalloc(1234, GFP_KERNEL);
+ if (!test_malloc)
+ pr_info("failed to kmalloc\n");
+
+ schedule_on_each_cpu(test_work);
+
+ kfree(test_malloc);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ while (!kthread_should_stop())
+ schedule();
+
+ return 0;
+}
+
+/*
+ * Do various things that may trigger events.
+ */
+static __init void event_test_stuff(void)
+{
+ struct task_struct *test_thread;
+
+ test_thread = kthread_run(event_test_thread, NULL, "test-events");
+ msleep(1);
+ kthread_stop(test_thread);
+}
+
+/*
+ * For every trace event defined, we will test each trace point separately,
+ * and then by groups, and finally all trace points.
+ */
+static __init void event_trace_self_tests(void)
+{
+ struct ftrace_event_call *call;
+ struct event_subsystem *system;
+ int ret;
+
+ pr_info("Running tests on trace events:\n");
+
+ list_for_each_entry(call, &ftrace_events, list) {
+
+ /* Only test those that have a regfunc */
+ if (!call->regfunc)
+ continue;
+
+ pr_info("Testing event %s: ", call->name);
+
+ /*
+ * If an event is already enabled, someone is using
+ * it and the self test should not be on.
+ */
+ if (call->enabled) {
+ pr_warning("Enabled event during self test!\n");
+ WARN_ON_ONCE(1);
+ continue;
+ }
+
+ ftrace_event_enable_disable(call, 1);
+ event_test_stuff();
+ ftrace_event_enable_disable(call, 0);
+
+ pr_cont("OK\n");
+ }
+
+ /* Now test at the sub system level */
+
+ pr_info("Running tests on trace event systems:\n");
+
+ list_for_each_entry(system, &event_subsystems, list) {
+
+ /* the ftrace system is special, skip it */
+ if (strcmp(system->name, "ftrace") == 0)
+ continue;
+
+ pr_info("Testing event system %s: ", system->name);
+
+ ret = __ftrace_set_clr_event(NULL, system->name, NULL, 1);
+ if (WARN_ON_ONCE(ret)) {
+ pr_warning("error enabling system %s\n",
+ system->name);
+ continue;
+ }
+
+ event_test_stuff();
+
+ ret = __ftrace_set_clr_event(NULL, system->name, NULL, 0);
+ if (WARN_ON_ONCE(ret))
+ pr_warning("error disabling system %s\n",
+ system->name);
+
+ pr_cont("OK\n");
+ }
+
+ /* Test with all events enabled */
+
+ pr_info("Running tests on all trace events:\n");
+ pr_info("Testing all events: ");
+
+ ret = __ftrace_set_clr_event(NULL, NULL, NULL, 1);
+ if (WARN_ON_ONCE(ret)) {
+ pr_warning("error enabling all events\n");
+ return;
+ }
+
+ event_test_stuff();
+
+ /* reset sysname */
+ ret = __ftrace_set_clr_event(NULL, NULL, NULL, 0);
+ if (WARN_ON_ONCE(ret)) {
+ pr_warning("error disabling all events\n");
+ return;
+ }
+
+ pr_cont("OK\n");
+}
+
+#ifdef CONFIG_FUNCTION_TRACER
+
+static DEFINE_PER_CPU(atomic_t, test_event_disable);
+
+static void
+function_test_events_call(unsigned long ip, unsigned long parent_ip)
+{
+ struct ring_buffer_event *event;
+ struct ftrace_entry *entry;
+ unsigned long flags;
+ long disabled;
+ int resched;
+ int cpu;
+ int pc;
+
+ pc = preempt_count();
+ resched = ftrace_preempt_disable();
+ cpu = raw_smp_processor_id();
+ disabled = atomic_inc_return(&per_cpu(test_event_disable, cpu));
+
+ if (disabled != 1)
+ goto out;
+
+ local_save_flags(flags);
+
+ event = trace_current_buffer_lock_reserve(TRACE_FN, sizeof(*entry),
+ flags, pc);
+ if (!event)
+ goto out;
+ entry = ring_buffer_event_data(event);
+ entry->ip = ip;
+ entry->parent_ip = parent_ip;
+
+ trace_nowake_buffer_unlock_commit(event, flags, pc);
+
+ out:
+ atomic_dec(&per_cpu(test_event_disable, cpu));
+ ftrace_preempt_enable(resched);
+}
+
+static struct ftrace_ops trace_ops __initdata =
+{
+ .func = function_test_events_call,
+};
+
+static __init void event_trace_self_test_with_function(void)
+{
+ register_ftrace_function(&trace_ops);
+ pr_info("Running tests again, along with the function tracer\n");
+ event_trace_self_tests();
+ unregister_ftrace_function(&trace_ops);
+}
+#else
+static __init void event_trace_self_test_with_function(void)
+{
+}
+#endif
+
+static __init int event_trace_self_tests_init(void)
+{
+
+ event_trace_self_tests();
+
+ event_trace_self_test_with_function();
+
+ return 0;
+}
+
+late_initcall(event_trace_self_tests_init);
+
+#endif
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/ctype.h>
+#include <linux/mutex.h>
#include "trace.h"
#include "trace_output.h"
-static int filter_pred_64(struct filter_pred *pred, void *event)
+static DEFINE_MUTEX(filter_mutex);
+
+enum filter_op_ids
+{
+ OP_OR,
+ OP_AND,
+ OP_NE,
+ OP_EQ,
+ OP_LT,
+ OP_LE,
+ OP_GT,
+ OP_GE,
+ OP_NONE,
+ OP_OPEN_PAREN,
+};
+
+struct filter_op {
+ int id;
+ char *string;
+ int precedence;
+};
+
+static struct filter_op filter_ops[] = {
+ { OP_OR, "||", 1 },
+ { OP_AND, "&&", 2 },
+ { OP_NE, "!=", 4 },
+ { OP_EQ, "==", 4 },
+ { OP_LT, "<", 5 },
+ { OP_LE, "<=", 5 },
+ { OP_GT, ">", 5 },
+ { OP_GE, ">=", 5 },
+ { OP_NONE, "OP_NONE", 0 },
+ { OP_OPEN_PAREN, "(", 0 },
+};
+
+enum {
+ FILT_ERR_NONE,
+ FILT_ERR_INVALID_OP,
+ FILT_ERR_UNBALANCED_PAREN,
+ FILT_ERR_TOO_MANY_OPERANDS,
+ FILT_ERR_OPERAND_TOO_LONG,
+ FILT_ERR_FIELD_NOT_FOUND,
+ FILT_ERR_ILLEGAL_FIELD_OP,
+ FILT_ERR_ILLEGAL_INTVAL,
+ FILT_ERR_BAD_SUBSYS_FILTER,
+ FILT_ERR_TOO_MANY_PREDS,
+ FILT_ERR_MISSING_FIELD,
+ FILT_ERR_INVALID_FILTER,
+};
+
+static char *err_text[] = {
+ "No error",
+ "Invalid operator",
+ "Unbalanced parens",
+ "Too many operands",
+ "Operand too long",
+ "Field not found",
+ "Illegal operation for field type",
+ "Illegal integer value",
+ "Couldn't find or set field in one of a subsystem's events",
+ "Too many terms in predicate expression",
+ "Missing field name and/or value",
+ "Meaningless filter expression",
+};
+
+struct opstack_op {
+ int op;
+ struct list_head list;
+};
+
+struct postfix_elt {
+ int op;
+ char *operand;
+ struct list_head list;
+};
+
+struct filter_parse_state {
+ struct filter_op *ops;
+ struct list_head opstack;
+ struct list_head postfix;
+ int lasterr;
+ int lasterr_pos;
+
+ struct {
+ char *string;
+ unsigned int cnt;
+ unsigned int tail;
+ } infix;
+
+ struct {
+ char string[MAX_FILTER_STR_VAL];
+ int pos;
+ unsigned int tail;
+ } operand;
+};
+
+DEFINE_COMPARISON_PRED(s64);
+DEFINE_COMPARISON_PRED(u64);
+DEFINE_COMPARISON_PRED(s32);
+DEFINE_COMPARISON_PRED(u32);
+DEFINE_COMPARISON_PRED(s16);
+DEFINE_COMPARISON_PRED(u16);
+DEFINE_COMPARISON_PRED(s8);
+DEFINE_COMPARISON_PRED(u8);
+
+DEFINE_EQUALITY_PRED(64);
+DEFINE_EQUALITY_PRED(32);
+DEFINE_EQUALITY_PRED(16);
+DEFINE_EQUALITY_PRED(8);
+
+static int filter_pred_and(struct filter_pred *pred __attribute((unused)),
+ void *event __attribute((unused)),
+ int val1, int val2)
+{
+ return val1 && val2;
+}
+
+static int filter_pred_or(struct filter_pred *pred __attribute((unused)),
+ void *event __attribute((unused)),
+ int val1, int val2)
+{
+ return val1 || val2;
+}
+
+/* Filter predicate for fixed sized arrays of characters */
+static int filter_pred_string(struct filter_pred *pred, void *event,
+ int val1, int val2)
{
- u64 *addr = (u64 *)(event + pred->offset);
- u64 val = (u64)pred->val;
- int match;
+ char *addr = (char *)(event + pred->offset);
+ int cmp, match;
+
+ cmp = strncmp(addr, pred->str_val, pred->str_len);
- match = (val == *addr) ^ pred->not;
+ match = (!cmp) ^ pred->not;
return match;
}
-static int filter_pred_32(struct filter_pred *pred, void *event)
+/*
+ * Filter predicate for dynamic sized arrays of characters.
+ * These are implemented through a list of strings at the end
+ * of the entry.
+ * Also each of these strings have a field in the entry which
+ * contains its offset from the beginning of the entry.
+ * We have then first to get this field, dereference it
+ * and add it to the address of the entry, and at last we have
+ * the address of the string.
+ */
+static int filter_pred_strloc(struct filter_pred *pred, void *event,
+ int val1, int val2)
{
- u32 *addr = (u32 *)(event + pred->offset);
- u32 val = (u32)pred->val;
- int match;
+ int str_loc = *(int *)(event + pred->offset);
+ char *addr = (char *)(event + str_loc);
+ int cmp, match;
+
+ cmp = strncmp(addr, pred->str_val, pred->str_len);
- match = (val == *addr) ^ pred->not;
+ match = (!cmp) ^ pred->not;
return match;
}
-static int filter_pred_16(struct filter_pred *pred, void *event)
+static int filter_pred_none(struct filter_pred *pred, void *event,
+ int val1, int val2)
+{
+ return 0;
+}
+
+/* return 1 if event matches, 0 otherwise (discard) */
+int filter_match_preds(struct ftrace_event_call *call, void *rec)
{
- u16 *addr = (u16 *)(event + pred->offset);
- u16 val = (u16)pred->val;
- int match;
+ struct event_filter *filter = call->filter;
+ int match, top = 0, val1 = 0, val2 = 0;
+ int stack[MAX_FILTER_PRED];
+ struct filter_pred *pred;
+ int i;
+
+ for (i = 0; i < filter->n_preds; i++) {
+ pred = filter->preds[i];
+ if (!pred->pop_n) {
+ match = pred->fn(pred, rec, val1, val2);
+ stack[top++] = match;
+ continue;
+ }
+ if (pred->pop_n > top) {
+ WARN_ON_ONCE(1);
+ return 0;
+ }
+ val1 = stack[--top];
+ val2 = stack[--top];
+ match = pred->fn(pred, rec, val1, val2);
+ stack[top++] = match;
+ }
- match = (val == *addr) ^ pred->not;
+ return stack[--top];
+}
+EXPORT_SYMBOL_GPL(filter_match_preds);
- return match;
+static void parse_error(struct filter_parse_state *ps, int err, int pos)
+{
+ ps->lasterr = err;
+ ps->lasterr_pos = pos;
}
-static int filter_pred_8(struct filter_pred *pred, void *event)
+static void remove_filter_string(struct event_filter *filter)
{
- u8 *addr = (u8 *)(event + pred->offset);
- u8 val = (u8)pred->val;
- int match;
+ kfree(filter->filter_string);
+ filter->filter_string = NULL;
+}
- match = (val == *addr) ^ pred->not;
+static int replace_filter_string(struct event_filter *filter,
+ char *filter_string)
+{
+ kfree(filter->filter_string);
+ filter->filter_string = kstrdup(filter_string, GFP_KERNEL);
+ if (!filter->filter_string)
+ return -ENOMEM;
- return match;
+ return 0;
}
-static int filter_pred_string(struct filter_pred *pred, void *event)
+static int append_filter_string(struct event_filter *filter,
+ char *string)
{
- char *addr = (char *)(event + pred->offset);
- int cmp, match;
+ int newlen;
+ char *new_filter_string;
- cmp = strncmp(addr, pred->str_val, pred->str_len);
+ BUG_ON(!filter->filter_string);
+ newlen = strlen(filter->filter_string) + strlen(string) + 1;
+ new_filter_string = kmalloc(newlen, GFP_KERNEL);
+ if (!new_filter_string)
+ return -ENOMEM;
- match = (!cmp) ^ pred->not;
+ strcpy(new_filter_string, filter->filter_string);
+ strcat(new_filter_string, string);
+ kfree(filter->filter_string);
+ filter->filter_string = new_filter_string;
- return match;
+ return 0;
}
-/* return 1 if event matches, 0 otherwise (discard) */
-int filter_match_preds(struct ftrace_event_call *call, void *rec)
+static void append_filter_err(struct filter_parse_state *ps,
+ struct event_filter *filter)
{
- int i, matched, and_failed = 0;
- struct filter_pred *pred;
+ int pos = ps->lasterr_pos;
+ char *buf, *pbuf;
- for (i = 0; i < MAX_FILTER_PRED; i++) {
- if (call->preds[i]) {
- pred = call->preds[i];
- if (and_failed && !pred->or)
- continue;
- matched = pred->fn(pred, rec);
- if (!matched && !pred->or) {
- and_failed = 1;
- continue;
- } else if (matched && pred->or)
- return 1;
- } else
- break;
- }
+ buf = (char *)__get_free_page(GFP_TEMPORARY);
+ if (!buf)
+ return;
- if (and_failed)
- return 0;
+ append_filter_string(filter, "\n");
+ memset(buf, ' ', PAGE_SIZE);
+ if (pos > PAGE_SIZE - 128)
+ pos = 0;
+ buf[pos] = '^';
+ pbuf = &buf[pos] + 1;
- return 1;
+ sprintf(pbuf, "\nparse_error: %s\n", err_text[ps->lasterr]);
+ append_filter_string(filter, buf);
+ free_page((unsigned long) buf);
}
-void filter_print_preds(struct filter_pred **preds, struct trace_seq *s)
+void print_event_filter(struct ftrace_event_call *call, struct trace_seq *s)
{
- char *field_name;
- struct filter_pred *pred;
- int i;
+ struct event_filter *filter = call->filter;
- if (!preds) {
+ mutex_lock(&filter_mutex);
+ if (filter->filter_string)
+ trace_seq_printf(s, "%s\n", filter->filter_string);
+ else
trace_seq_printf(s, "none\n");
- return;
- }
+ mutex_unlock(&filter_mutex);
+}
- for (i = 0; i < MAX_FILTER_PRED; i++) {
- if (preds[i]) {
- pred = preds[i];
- field_name = pred->field_name;
- if (i)
- trace_seq_printf(s, pred->or ? "|| " : "&& ");
- trace_seq_printf(s, "%s ", field_name);
- trace_seq_printf(s, pred->not ? "!= " : "== ");
- if (pred->str_val)
- trace_seq_printf(s, "%s\n", pred->str_val);
- else
- trace_seq_printf(s, "%llu\n", pred->val);
- } else
- break;
- }
+void print_subsystem_event_filter(struct event_subsystem *system,
+ struct trace_seq *s)
+{
+ struct event_filter *filter = system->filter;
+
+ mutex_lock(&filter_mutex);
+ if (filter->filter_string)
+ trace_seq_printf(s, "%s\n", filter->filter_string);
+ else
+ trace_seq_printf(s, "none\n");
+ mutex_unlock(&filter_mutex);
}
static struct ftrace_event_field *
return NULL;
}
-void filter_free_pred(struct filter_pred *pred)
+static void filter_free_pred(struct filter_pred *pred)
{
if (!pred)
return;
kfree(pred->field_name);
- kfree(pred->str_val);
kfree(pred);
}
-void filter_free_preds(struct ftrace_event_call *call)
+static void filter_clear_pred(struct filter_pred *pred)
{
- int i;
+ kfree(pred->field_name);
+ pred->field_name = NULL;
+ pred->str_len = 0;
+}
- if (call->preds) {
- for (i = 0; i < MAX_FILTER_PRED; i++)
- filter_free_pred(call->preds[i]);
- kfree(call->preds);
- call->preds = NULL;
+static int filter_set_pred(struct filter_pred *dest,
+ struct filter_pred *src,
+ filter_pred_fn_t fn)
+{
+ *dest = *src;
+ if (src->field_name) {
+ dest->field_name = kstrdup(src->field_name, GFP_KERNEL);
+ if (!dest->field_name)
+ return -ENOMEM;
}
+ dest->fn = fn;
+
+ return 0;
}
-void filter_free_subsystem_preds(struct event_subsystem *system)
+static void filter_disable_preds(struct ftrace_event_call *call)
{
- struct ftrace_event_call *call = __start_ftrace_events;
+ struct event_filter *filter = call->filter;
int i;
- if (system->preds) {
- for (i = 0; i < MAX_FILTER_PRED; i++)
- filter_free_pred(system->preds[i]);
- kfree(system->preds);
- system->preds = NULL;
- }
+ call->filter_active = 0;
+ filter->n_preds = 0;
- events_for_each(call) {
- if (!call->name || !call->regfunc)
- continue;
+ for (i = 0; i < MAX_FILTER_PRED; i++)
+ filter->preds[i]->fn = filter_pred_none;
+}
+
+void destroy_preds(struct ftrace_event_call *call)
+{
+ struct event_filter *filter = call->filter;
+ int i;
- if (!strcmp(call->system, system->name))
- filter_free_preds(call);
+ for (i = 0; i < MAX_FILTER_PRED; i++) {
+ if (filter->preds[i])
+ filter_free_pred(filter->preds[i]);
}
+ kfree(filter->preds);
+ kfree(filter);
+ call->filter = NULL;
}
-static int __filter_add_pred(struct ftrace_event_call *call,
- struct filter_pred *pred)
+int init_preds(struct ftrace_event_call *call)
{
+ struct event_filter *filter;
+ struct filter_pred *pred;
int i;
- if (call->preds && !pred->compound)
- filter_free_preds(call);
+ filter = call->filter = kzalloc(sizeof(*filter), GFP_KERNEL);
+ if (!call->filter)
+ return -ENOMEM;
- if (!call->preds) {
- call->preds = kzalloc(MAX_FILTER_PRED * sizeof(pred),
- GFP_KERNEL);
- if (!call->preds)
- return -ENOMEM;
- }
+ call->filter_active = 0;
+ filter->n_preds = 0;
+
+ filter->preds = kzalloc(MAX_FILTER_PRED * sizeof(pred), GFP_KERNEL);
+ if (!filter->preds)
+ goto oom;
for (i = 0; i < MAX_FILTER_PRED; i++) {
- if (!call->preds[i]) {
- call->preds[i] = pred;
- return 0;
+ pred = kzalloc(sizeof(*pred), GFP_KERNEL);
+ if (!pred)
+ goto oom;
+ pred->fn = filter_pred_none;
+ filter->preds[i] = pred;
+ }
+
+ return 0;
+
+oom:
+ destroy_preds(call);
+
+ return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(init_preds);
+
+static void filter_free_subsystem_preds(struct event_subsystem *system)
+{
+ struct event_filter *filter = system->filter;
+ struct ftrace_event_call *call;
+ int i;
+
+ if (filter->n_preds) {
+ for (i = 0; i < filter->n_preds; i++)
+ filter_free_pred(filter->preds[i]);
+ kfree(filter->preds);
+ filter->preds = NULL;
+ filter->n_preds = 0;
+ }
+
+ mutex_lock(&event_mutex);
+ list_for_each_entry(call, &ftrace_events, list) {
+ if (!call->define_fields)
+ continue;
+
+ if (!strcmp(call->system, system->name)) {
+ filter_disable_preds(call);
+ remove_filter_string(call->filter);
}
}
+ mutex_unlock(&event_mutex);
+}
+
+static int filter_add_pred_fn(struct filter_parse_state *ps,
+ struct ftrace_event_call *call,
+ struct filter_pred *pred,
+ filter_pred_fn_t fn)
+{
+ struct event_filter *filter = call->filter;
+ int idx, err;
+
+ if (filter->n_preds == MAX_FILTER_PRED) {
+ parse_error(ps, FILT_ERR_TOO_MANY_PREDS, 0);
+ return -ENOSPC;
+ }
+
+ idx = filter->n_preds;
+ filter_clear_pred(filter->preds[idx]);
+ err = filter_set_pred(filter->preds[idx], pred, fn);
+ if (err)
+ return err;
- return -ENOSPC;
+ filter->n_preds++;
+ call->filter_active = 1;
+
+ return 0;
}
+enum {
+ FILTER_STATIC_STRING = 1,
+ FILTER_DYN_STRING
+};
+
static int is_string_field(const char *type)
{
+ if (strstr(type, "__data_loc") && strstr(type, "char"))
+ return FILTER_DYN_STRING;
+
if (strchr(type, '[') && strstr(type, "char"))
- return 1;
+ return FILTER_STATIC_STRING;
return 0;
}
-int filter_add_pred(struct ftrace_event_call *call, struct filter_pred *pred)
+static int is_legal_op(struct ftrace_event_field *field, int op)
{
- struct ftrace_event_field *field;
-
- field = find_event_field(call, pred->field_name);
- if (!field)
- return -EINVAL;
+ if (is_string_field(field->type) && (op != OP_EQ && op != OP_NE))
+ return 0;
- pred->offset = field->offset;
+ return 1;
+}
- if (is_string_field(field->type)) {
- if (!pred->str_val)
- return -EINVAL;
- pred->fn = filter_pred_string;
- pred->str_len = field->size;
- return __filter_add_pred(call, pred);
- } else {
- if (pred->str_val)
- return -EINVAL;
- }
+static filter_pred_fn_t select_comparison_fn(int op, int field_size,
+ int field_is_signed)
+{
+ filter_pred_fn_t fn = NULL;
- switch (field->size) {
+ switch (field_size) {
case 8:
- pred->fn = filter_pred_64;
+ if (op == OP_EQ || op == OP_NE)
+ fn = filter_pred_64;
+ else if (field_is_signed)
+ fn = filter_pred_s64;
+ else
+ fn = filter_pred_u64;
break;
case 4:
- pred->fn = filter_pred_32;
+ if (op == OP_EQ || op == OP_NE)
+ fn = filter_pred_32;
+ else if (field_is_signed)
+ fn = filter_pred_s32;
+ else
+ fn = filter_pred_u32;
break;
case 2:
- pred->fn = filter_pred_16;
+ if (op == OP_EQ || op == OP_NE)
+ fn = filter_pred_16;
+ else if (field_is_signed)
+ fn = filter_pred_s16;
+ else
+ fn = filter_pred_u16;
break;
case 1:
- pred->fn = filter_pred_8;
+ if (op == OP_EQ || op == OP_NE)
+ fn = filter_pred_8;
+ else if (field_is_signed)
+ fn = filter_pred_s8;
+ else
+ fn = filter_pred_u8;
break;
- default:
- return -EINVAL;
}
- return __filter_add_pred(call, pred);
+ return fn;
}
-static struct filter_pred *copy_pred(struct filter_pred *pred)
+static int filter_add_pred(struct filter_parse_state *ps,
+ struct ftrace_event_call *call,
+ struct filter_pred *pred)
{
- struct filter_pred *new_pred = kmalloc(sizeof(*pred), GFP_KERNEL);
- if (!new_pred)
- return NULL;
+ struct ftrace_event_field *field;
+ filter_pred_fn_t fn;
+ unsigned long long val;
+ int string_type;
+
+ pred->fn = filter_pred_none;
+
+ if (pred->op == OP_AND) {
+ pred->pop_n = 2;
+ return filter_add_pred_fn(ps, call, pred, filter_pred_and);
+ } else if (pred->op == OP_OR) {
+ pred->pop_n = 2;
+ return filter_add_pred_fn(ps, call, pred, filter_pred_or);
+ }
+
+ field = find_event_field(call, pred->field_name);
+ if (!field) {
+ parse_error(ps, FILT_ERR_FIELD_NOT_FOUND, 0);
+ return -EINVAL;
+ }
- memcpy(new_pred, pred, sizeof(*pred));
+ pred->offset = field->offset;
- if (pred->field_name) {
- new_pred->field_name = kstrdup(pred->field_name, GFP_KERNEL);
- if (!new_pred->field_name) {
- kfree(new_pred);
- return NULL;
- }
+ if (!is_legal_op(field, pred->op)) {
+ parse_error(ps, FILT_ERR_ILLEGAL_FIELD_OP, 0);
+ return -EINVAL;
}
- if (pred->str_val) {
- new_pred->str_val = kstrdup(pred->str_val, GFP_KERNEL);
- if (!new_pred->str_val) {
- filter_free_pred(new_pred);
- return NULL;
+ string_type = is_string_field(field->type);
+ if (string_type) {
+ if (string_type == FILTER_STATIC_STRING)
+ fn = filter_pred_string;
+ else
+ fn = filter_pred_strloc;
+ pred->str_len = field->size;
+ if (pred->op == OP_NE)
+ pred->not = 1;
+ return filter_add_pred_fn(ps, call, pred, fn);
+ } else {
+ if (strict_strtoull(pred->str_val, 0, &val)) {
+ parse_error(ps, FILT_ERR_ILLEGAL_INTVAL, 0);
+ return -EINVAL;
}
+ pred->val = val;
+ }
+
+ fn = select_comparison_fn(pred->op, field->size, field->is_signed);
+ if (!fn) {
+ parse_error(ps, FILT_ERR_INVALID_OP, 0);
+ return -EINVAL;
}
- return new_pred;
+ if (pred->op == OP_NE)
+ pred->not = 1;
+
+ return filter_add_pred_fn(ps, call, pred, fn);
}
-int filter_add_subsystem_pred(struct event_subsystem *system,
- struct filter_pred *pred)
+static int filter_add_subsystem_pred(struct filter_parse_state *ps,
+ struct event_subsystem *system,
+ struct filter_pred *pred,
+ char *filter_string)
{
- struct ftrace_event_call *call = __start_ftrace_events;
- struct filter_pred *event_pred;
- int i;
-
- if (system->preds && !pred->compound)
- filter_free_subsystem_preds(system);
+ struct event_filter *filter = system->filter;
+ struct ftrace_event_call *call;
+ int err = 0;
- if (!system->preds) {
- system->preds = kzalloc(MAX_FILTER_PRED * sizeof(pred),
+ if (!filter->preds) {
+ filter->preds = kzalloc(MAX_FILTER_PRED * sizeof(pred),
GFP_KERNEL);
- if (!system->preds)
+
+ if (!filter->preds)
return -ENOMEM;
}
- for (i = 0; i < MAX_FILTER_PRED; i++) {
- if (!system->preds[i]) {
- system->preds[i] = pred;
- break;
- }
+ if (filter->n_preds == MAX_FILTER_PRED) {
+ parse_error(ps, FILT_ERR_TOO_MANY_PREDS, 0);
+ return -ENOSPC;
}
- if (i == MAX_FILTER_PRED)
- return -ENOSPC;
+ filter->preds[filter->n_preds] = pred;
+ filter->n_preds++;
- events_for_each(call) {
- int err;
+ mutex_lock(&event_mutex);
+ list_for_each_entry(call, &ftrace_events, list) {
- if (!call->name || !call->regfunc)
+ if (!call->define_fields)
continue;
if (strcmp(call->system, system->name))
continue;
- if (!find_event_field(call, pred->field_name))
- continue;
+ err = filter_add_pred(ps, call, pred);
+ if (err) {
+ mutex_unlock(&event_mutex);
+ filter_free_subsystem_preds(system);
+ parse_error(ps, FILT_ERR_BAD_SUBSYS_FILTER, 0);
+ goto out;
+ }
+ replace_filter_string(call->filter, filter_string);
+ }
+ mutex_unlock(&event_mutex);
+out:
+ return err;
+}
- event_pred = copy_pred(pred);
- if (!event_pred)
- goto oom;
+static void parse_init(struct filter_parse_state *ps,
+ struct filter_op *ops,
+ char *infix_string)
+{
+ memset(ps, '\0', sizeof(*ps));
- err = filter_add_pred(call, event_pred);
- if (err)
- filter_free_pred(event_pred);
- if (err == -ENOMEM)
- goto oom;
+ ps->infix.string = infix_string;
+ ps->infix.cnt = strlen(infix_string);
+ ps->ops = ops;
+
+ INIT_LIST_HEAD(&ps->opstack);
+ INIT_LIST_HEAD(&ps->postfix);
+}
+
+static char infix_next(struct filter_parse_state *ps)
+{
+ ps->infix.cnt--;
+
+ return ps->infix.string[ps->infix.tail++];
+}
+
+static char infix_peek(struct filter_parse_state *ps)
+{
+ if (ps->infix.tail == strlen(ps->infix.string))
+ return 0;
+
+ return ps->infix.string[ps->infix.tail];
+}
+
+static void infix_advance(struct filter_parse_state *ps)
+{
+ ps->infix.cnt--;
+ ps->infix.tail++;
+}
+
+static inline int is_precedence_lower(struct filter_parse_state *ps,
+ int a, int b)
+{
+ return ps->ops[a].precedence < ps->ops[b].precedence;
+}
+
+static inline int is_op_char(struct filter_parse_state *ps, char c)
+{
+ int i;
+
+ for (i = 0; strcmp(ps->ops[i].string, "OP_NONE"); i++) {
+ if (ps->ops[i].string[0] == c)
+ return 1;
}
return 0;
+}
-oom:
- system->preds[i] = NULL;
- return -ENOMEM;
+static int infix_get_op(struct filter_parse_state *ps, char firstc)
+{
+ char nextc = infix_peek(ps);
+ char opstr[3];
+ int i;
+
+ opstr[0] = firstc;
+ opstr[1] = nextc;
+ opstr[2] = '\0';
+
+ for (i = 0; strcmp(ps->ops[i].string, "OP_NONE"); i++) {
+ if (!strcmp(opstr, ps->ops[i].string)) {
+ infix_advance(ps);
+ return ps->ops[i].id;
+ }
+ }
+
+ opstr[1] = '\0';
+
+ for (i = 0; strcmp(ps->ops[i].string, "OP_NONE"); i++) {
+ if (!strcmp(opstr, ps->ops[i].string))
+ return ps->ops[i].id;
+ }
+
+ return OP_NONE;
}
-int filter_parse(char **pbuf, struct filter_pred *pred)
+static inline void clear_operand_string(struct filter_parse_state *ps)
{
- char *tmp, *tok, *val_str = NULL;
- int tok_n = 0;
+ memset(ps->operand.string, '\0', MAX_FILTER_STR_VAL);
+ ps->operand.tail = 0;
+}
- /* field ==/!= number, or/and field ==/!= number, number */
- while ((tok = strsep(pbuf, " \n"))) {
- if (tok_n == 0) {
- if (!strcmp(tok, "0")) {
- pred->clear = 1;
- return 0;
- } else if (!strcmp(tok, "&&")) {
- pred->or = 0;
- pred->compound = 1;
- } else if (!strcmp(tok, "||")) {
- pred->or = 1;
- pred->compound = 1;
- } else
- pred->field_name = tok;
- tok_n = 1;
+static inline int append_operand_char(struct filter_parse_state *ps, char c)
+{
+ if (ps->operand.tail == MAX_FILTER_STR_VAL - 1)
+ return -EINVAL;
+
+ ps->operand.string[ps->operand.tail++] = c;
+
+ return 0;
+}
+
+static int filter_opstack_push(struct filter_parse_state *ps, int op)
+{
+ struct opstack_op *opstack_op;
+
+ opstack_op = kmalloc(sizeof(*opstack_op), GFP_KERNEL);
+ if (!opstack_op)
+ return -ENOMEM;
+
+ opstack_op->op = op;
+ list_add(&opstack_op->list, &ps->opstack);
+
+ return 0;
+}
+
+static int filter_opstack_empty(struct filter_parse_state *ps)
+{
+ return list_empty(&ps->opstack);
+}
+
+static int filter_opstack_top(struct filter_parse_state *ps)
+{
+ struct opstack_op *opstack_op;
+
+ if (filter_opstack_empty(ps))
+ return OP_NONE;
+
+ opstack_op = list_first_entry(&ps->opstack, struct opstack_op, list);
+
+ return opstack_op->op;
+}
+
+static int filter_opstack_pop(struct filter_parse_state *ps)
+{
+ struct opstack_op *opstack_op;
+ int op;
+
+ if (filter_opstack_empty(ps))
+ return OP_NONE;
+
+ opstack_op = list_first_entry(&ps->opstack, struct opstack_op, list);
+ op = opstack_op->op;
+ list_del(&opstack_op->list);
+
+ kfree(opstack_op);
+
+ return op;
+}
+
+static void filter_opstack_clear(struct filter_parse_state *ps)
+{
+ while (!filter_opstack_empty(ps))
+ filter_opstack_pop(ps);
+}
+
+static char *curr_operand(struct filter_parse_state *ps)
+{
+ return ps->operand.string;
+}
+
+static int postfix_append_operand(struct filter_parse_state *ps, char *operand)
+{
+ struct postfix_elt *elt;
+
+ elt = kmalloc(sizeof(*elt), GFP_KERNEL);
+ if (!elt)
+ return -ENOMEM;
+
+ elt->op = OP_NONE;
+ elt->operand = kstrdup(operand, GFP_KERNEL);
+ if (!elt->operand) {
+ kfree(elt);
+ return -ENOMEM;
+ }
+
+ list_add_tail(&elt->list, &ps->postfix);
+
+ return 0;
+}
+
+static int postfix_append_op(struct filter_parse_state *ps, int op)
+{
+ struct postfix_elt *elt;
+
+ elt = kmalloc(sizeof(*elt), GFP_KERNEL);
+ if (!elt)
+ return -ENOMEM;
+
+ elt->op = op;
+ elt->operand = NULL;
+
+ list_add_tail(&elt->list, &ps->postfix);
+
+ return 0;
+}
+
+static void postfix_clear(struct filter_parse_state *ps)
+{
+ struct postfix_elt *elt;
+
+ while (!list_empty(&ps->postfix)) {
+ elt = list_first_entry(&ps->postfix, struct postfix_elt, list);
+ kfree(elt->operand);
+ list_del(&elt->list);
+ }
+}
+
+static int filter_parse(struct filter_parse_state *ps)
+{
+ int in_string = 0;
+ int op, top_op;
+ char ch;
+
+ while ((ch = infix_next(ps))) {
+ if (ch == '"') {
+ in_string ^= 1;
continue;
}
- if (tok_n == 1) {
- if (!pred->field_name)
- pred->field_name = tok;
- else if (!strcmp(tok, "!="))
- pred->not = 1;
- else if (!strcmp(tok, "=="))
- pred->not = 0;
- else {
- pred->field_name = NULL;
+
+ if (in_string)
+ goto parse_operand;
+
+ if (isspace(ch))
+ continue;
+
+ if (is_op_char(ps, ch)) {
+ op = infix_get_op(ps, ch);
+ if (op == OP_NONE) {
+ parse_error(ps, FILT_ERR_INVALID_OP, 0);
return -EINVAL;
}
- tok_n = 2;
+
+ if (strlen(curr_operand(ps))) {
+ postfix_append_operand(ps, curr_operand(ps));
+ clear_operand_string(ps);
+ }
+
+ while (!filter_opstack_empty(ps)) {
+ top_op = filter_opstack_top(ps);
+ if (!is_precedence_lower(ps, top_op, op)) {
+ top_op = filter_opstack_pop(ps);
+ postfix_append_op(ps, top_op);
+ continue;
+ }
+ break;
+ }
+
+ filter_opstack_push(ps, op);
continue;
}
- if (tok_n == 2) {
- if (pred->compound) {
- if (!strcmp(tok, "!="))
- pred->not = 1;
- else if (!strcmp(tok, "=="))
- pred->not = 0;
- else {
- pred->field_name = NULL;
- return -EINVAL;
- }
- } else {
- val_str = tok;
- break; /* done */
+
+ if (ch == '(') {
+ filter_opstack_push(ps, OP_OPEN_PAREN);
+ continue;
+ }
+
+ if (ch == ')') {
+ if (strlen(curr_operand(ps))) {
+ postfix_append_operand(ps, curr_operand(ps));
+ clear_operand_string(ps);
+ }
+
+ top_op = filter_opstack_pop(ps);
+ while (top_op != OP_NONE) {
+ if (top_op == OP_OPEN_PAREN)
+ break;
+ postfix_append_op(ps, top_op);
+ top_op = filter_opstack_pop(ps);
+ }
+ if (top_op == OP_NONE) {
+ parse_error(ps, FILT_ERR_UNBALANCED_PAREN, 0);
+ return -EINVAL;
}
- tok_n = 3;
continue;
}
- if (tok_n == 3) {
- val_str = tok;
- break; /* done */
+parse_operand:
+ if (append_operand_char(ps, ch)) {
+ parse_error(ps, FILT_ERR_OPERAND_TOO_LONG, 0);
+ return -EINVAL;
}
}
- if (!val_str) {
- pred->field_name = NULL;
- return -EINVAL;
+ if (strlen(curr_operand(ps)))
+ postfix_append_operand(ps, curr_operand(ps));
+
+ while (!filter_opstack_empty(ps)) {
+ top_op = filter_opstack_pop(ps);
+ if (top_op == OP_NONE)
+ break;
+ if (top_op == OP_OPEN_PAREN) {
+ parse_error(ps, FILT_ERR_UNBALANCED_PAREN, 0);
+ return -EINVAL;
+ }
+ postfix_append_op(ps, top_op);
}
- pred->field_name = kstrdup(pred->field_name, GFP_KERNEL);
- if (!pred->field_name)
- return -ENOMEM;
+ return 0;
+}
- pred->val = simple_strtoull(val_str, &tmp, 0);
- if (tmp == val_str) {
- pred->str_val = kstrdup(val_str, GFP_KERNEL);
- if (!pred->str_val)
- return -ENOMEM;
- } else if (*tmp != '\0')
+static struct filter_pred *create_pred(int op, char *operand1, char *operand2)
+{
+ struct filter_pred *pred;
+
+ pred = kzalloc(sizeof(*pred), GFP_KERNEL);
+ if (!pred)
+ return NULL;
+
+ pred->field_name = kstrdup(operand1, GFP_KERNEL);
+ if (!pred->field_name) {
+ kfree(pred);
+ return NULL;
+ }
+
+ strcpy(pred->str_val, operand2);
+ pred->str_len = strlen(operand2);
+
+ pred->op = op;
+
+ return pred;
+}
+
+static struct filter_pred *create_logical_pred(int op)
+{
+ struct filter_pred *pred;
+
+ pred = kzalloc(sizeof(*pred), GFP_KERNEL);
+ if (!pred)
+ return NULL;
+
+ pred->op = op;
+
+ return pred;
+}
+
+static int check_preds(struct filter_parse_state *ps)
+{
+ int n_normal_preds = 0, n_logical_preds = 0;
+ struct postfix_elt *elt;
+
+ list_for_each_entry(elt, &ps->postfix, list) {
+ if (elt->op == OP_NONE)
+ continue;
+
+ if (elt->op == OP_AND || elt->op == OP_OR) {
+ n_logical_preds++;
+ continue;
+ }
+ n_normal_preds++;
+ }
+
+ if (!n_normal_preds || n_logical_preds >= n_normal_preds) {
+ parse_error(ps, FILT_ERR_INVALID_FILTER, 0);
return -EINVAL;
+ }
return 0;
}
+static int replace_preds(struct event_subsystem *system,
+ struct ftrace_event_call *call,
+ struct filter_parse_state *ps,
+ char *filter_string)
+{
+ char *operand1 = NULL, *operand2 = NULL;
+ struct filter_pred *pred;
+ struct postfix_elt *elt;
+ int err;
+
+ err = check_preds(ps);
+ if (err)
+ return err;
+
+ list_for_each_entry(elt, &ps->postfix, list) {
+ if (elt->op == OP_NONE) {
+ if (!operand1)
+ operand1 = elt->operand;
+ else if (!operand2)
+ operand2 = elt->operand;
+ else {
+ parse_error(ps, FILT_ERR_TOO_MANY_OPERANDS, 0);
+ return -EINVAL;
+ }
+ continue;
+ }
+
+ if (elt->op == OP_AND || elt->op == OP_OR) {
+ pred = create_logical_pred(elt->op);
+ if (call) {
+ err = filter_add_pred(ps, call, pred);
+ filter_free_pred(pred);
+ } else
+ err = filter_add_subsystem_pred(ps, system,
+ pred, filter_string);
+ if (err)
+ return err;
+
+ operand1 = operand2 = NULL;
+ continue;
+ }
+
+ if (!operand1 || !operand2) {
+ parse_error(ps, FILT_ERR_MISSING_FIELD, 0);
+ return -EINVAL;
+ }
+
+ pred = create_pred(elt->op, operand1, operand2);
+ if (call) {
+ err = filter_add_pred(ps, call, pred);
+ filter_free_pred(pred);
+ } else
+ err = filter_add_subsystem_pred(ps, system, pred,
+ filter_string);
+ if (err)
+ return err;
+
+ operand1 = operand2 = NULL;
+ }
+
+ return 0;
+}
+
+int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
+{
+ int err;
+
+ struct filter_parse_state *ps;
+
+ mutex_lock(&filter_mutex);
+
+ if (!strcmp(strstrip(filter_string), "0")) {
+ filter_disable_preds(call);
+ remove_filter_string(call->filter);
+ mutex_unlock(&filter_mutex);
+ return 0;
+ }
+
+ err = -ENOMEM;
+ ps = kzalloc(sizeof(*ps), GFP_KERNEL);
+ if (!ps)
+ goto out_unlock;
+
+ filter_disable_preds(call);
+ replace_filter_string(call->filter, filter_string);
+
+ parse_init(ps, filter_ops, filter_string);
+ err = filter_parse(ps);
+ if (err) {
+ append_filter_err(ps, call->filter);
+ goto out;
+ }
+
+ err = replace_preds(NULL, call, ps, filter_string);
+ if (err)
+ append_filter_err(ps, call->filter);
+
+out:
+ filter_opstack_clear(ps);
+ postfix_clear(ps);
+ kfree(ps);
+out_unlock:
+ mutex_unlock(&filter_mutex);
+
+ return err;
+}
+
+int apply_subsystem_event_filter(struct event_subsystem *system,
+ char *filter_string)
+{
+ int err;
+
+ struct filter_parse_state *ps;
+
+ mutex_lock(&filter_mutex);
+
+ if (!strcmp(strstrip(filter_string), "0")) {
+ filter_free_subsystem_preds(system);
+ remove_filter_string(system->filter);
+ mutex_unlock(&filter_mutex);
+ return 0;
+ }
+
+ err = -ENOMEM;
+ ps = kzalloc(sizeof(*ps), GFP_KERNEL);
+ if (!ps)
+ goto out_unlock;
+
+ filter_free_subsystem_preds(system);
+ replace_filter_string(system->filter, filter_string);
+
+ parse_init(ps, filter_ops, filter_string);
+ err = filter_parse(ps);
+ if (err) {
+ append_filter_err(ps, system->filter);
+ goto out;
+ }
+
+ err = replace_preds(system, NULL, ps, filter_string);
+ if (err)
+ append_filter_err(ps, system->filter);
+
+out:
+ filter_opstack_clear(ps);
+ postfix_clear(ps);
+ kfree(ps);
+out_unlock:
+ mutex_unlock(&filter_mutex);
+
+ return err;
+}
+++ /dev/null
-/*
- * Stage 1 of the trace events.
- *
- * Override the macros in <trace/trace_event_types.h> to include the following:
- *
- * struct ftrace_raw_<call> {
- * struct trace_entry ent;
- * <type> <item>;
- * <type2> <item2>[<len>];
- * [...]
- * };
- *
- * The <type> <item> is created by the __field(type, item) macro or
- * the __array(type2, item2, len) macro.
- * We simply do "type item;", and that will create the fields
- * in the structure.
- */
-
-#undef TRACE_FORMAT
-#define TRACE_FORMAT(call, proto, args, fmt)
-
-#undef __array
-#define __array(type, item, len) type item[len];
-
-#undef __field
-#define __field(type, item) type item;
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#undef TRACE_EVENT
-#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
- struct ftrace_raw_##name { \
- struct trace_entry ent; \
- tstruct \
- }; \
- static struct ftrace_event_call event_##name
-
-#include <trace/trace_event_types.h>
+++ /dev/null
-/*
- * Stage 2 of the trace events.
- *
- * Override the macros in <trace/trace_event_types.h> to include the following:
- *
- * enum print_line_t
- * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
- * {
- * struct trace_seq *s = &iter->seq;
- * struct ftrace_raw_<call> *field; <-- defined in stage 1
- * struct trace_entry *entry;
- * int ret;
- *
- * entry = iter->ent;
- *
- * if (entry->type != event_<call>.id) {
- * WARN_ON_ONCE(1);
- * return TRACE_TYPE_UNHANDLED;
- * }
- *
- * field = (typeof(field))entry;
- *
- * ret = trace_seq_printf(s, <TP_printk> "\n");
- * if (!ret)
- * return TRACE_TYPE_PARTIAL_LINE;
- *
- * return TRACE_TYPE_HANDLED;
- * }
- *
- * This is the method used to print the raw event to the trace
- * output format. Note, this is not needed if the data is read
- * in binary.
- */
-
-#undef __entry
-#define __entry field
-
-#undef TP_printk
-#define TP_printk(fmt, args...) fmt "\n", args
-
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
-enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
-{ \
- struct trace_seq *s = &iter->seq; \
- struct ftrace_raw_##call *field; \
- struct trace_entry *entry; \
- int ret; \
- \
- entry = iter->ent; \
- \
- if (entry->type != event_##call.id) { \
- WARN_ON_ONCE(1); \
- return TRACE_TYPE_UNHANDLED; \
- } \
- \
- field = (typeof(field))entry; \
- \
- ret = trace_seq_printf(s, #call ": " print); \
- if (!ret) \
- return TRACE_TYPE_PARTIAL_LINE; \
- \
- return TRACE_TYPE_HANDLED; \
-}
-
-#include <trace/trace_event_types.h>
-
-/*
- * Setup the showing format of trace point.
- *
- * int
- * ftrace_format_##call(struct trace_seq *s)
- * {
- * struct ftrace_raw_##call field;
- * int ret;
- *
- * ret = trace_seq_printf(s, #type " " #item ";"
- * " offset:%u; size:%u;\n",
- * offsetof(struct ftrace_raw_##call, item),
- * sizeof(field.type));
- *
- * }
- */
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#undef __field
-#define __field(type, item) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
- "offset:%u;\tsize:%u;\n", \
- (unsigned int)offsetof(typeof(field), item), \
- (unsigned int)sizeof(field.item)); \
- if (!ret) \
- return 0;
-
-#undef __array
-#define __array(type, item, len) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
- "offset:%u;\tsize:%u;\n", \
- (unsigned int)offsetof(typeof(field), item), \
- (unsigned int)sizeof(field.item)); \
- if (!ret) \
- return 0;
-
-#undef __entry
-#define __entry REC
-
-#undef TP_printk
-#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
-
-#undef TP_fast_assign
-#define TP_fast_assign(args...) args
-
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
-static int \
-ftrace_format_##call(struct trace_seq *s) \
-{ \
- struct ftrace_raw_##call field; \
- int ret; \
- \
- tstruct; \
- \
- trace_seq_printf(s, "\nprint fmt: " print); \
- \
- return ret; \
-}
-
-#include <trace/trace_event_types.h>
-
-#undef __field
-#define __field(type, item) \
- ret = trace_define_field(event_call, #type, #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item)); \
- if (ret) \
- return ret;
-
-#undef __array
-#define __array(type, item, len) \
- ret = trace_define_field(event_call, #type "[" #len "]", #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item)); \
- if (ret) \
- return ret;
-
-#define __common_field(type, item) \
- ret = trace_define_field(event_call, #type, "common_" #item, \
- offsetof(typeof(field.ent), item), \
- sizeof(field.ent.item)); \
- if (ret) \
- return ret;
-
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
-int \
-ftrace_define_fields_##call(void) \
-{ \
- struct ftrace_raw_##call field; \
- struct ftrace_event_call *event_call = &event_##call; \
- int ret; \
- \
- __common_field(unsigned char, type); \
- __common_field(unsigned char, flags); \
- __common_field(unsigned char, preempt_count); \
- __common_field(int, pid); \
- __common_field(int, tgid); \
- \
- tstruct; \
- \
- return ret; \
-}
-
-#include <trace/trace_event_types.h>
+++ /dev/null
-/*
- * Stage 3 of the trace events.
- *
- * Override the macros in <trace/trace_event_types.h> to include the following:
- *
- * static void ftrace_event_<call>(proto)
- * {
- * event_trace_printk(_RET_IP_, "<call>: " <fmt>);
- * }
- *
- * static int ftrace_reg_event_<call>(void)
- * {
- * int ret;
- *
- * ret = register_trace_<call>(ftrace_event_<call>);
- * if (!ret)
- * pr_info("event trace: Could not activate trace point "
- * "probe to <call>");
- * return ret;
- * }
- *
- * static void ftrace_unreg_event_<call>(void)
- * {
- * unregister_trace_<call>(ftrace_event_<call>);
- * }
- *
- * For those macros defined with TRACE_FORMAT:
- *
- * static struct ftrace_event_call __used
- * __attribute__((__aligned__(4)))
- * __attribute__((section("_ftrace_events"))) event_<call> = {
- * .name = "<call>",
- * .regfunc = ftrace_reg_event_<call>,
- * .unregfunc = ftrace_unreg_event_<call>,
- * }
- *
- *
- * For those macros defined with TRACE_EVENT:
- *
- * static struct ftrace_event_call event_<call>;
- *
- * static void ftrace_raw_event_<call>(proto)
- * {
- * struct ring_buffer_event *event;
- * struct ftrace_raw_<call> *entry; <-- defined in stage 1
- * unsigned long irq_flags;
- * int pc;
- *
- * local_save_flags(irq_flags);
- * pc = preempt_count();
- *
- * event = trace_current_buffer_lock_reserve(event_<call>.id,
- * sizeof(struct ftrace_raw_<call>),
- * irq_flags, pc);
- * if (!event)
- * return;
- * entry = ring_buffer_event_data(event);
- *
- * <assign>; <-- Here we assign the entries by the __field and
- * __array macros.
- *
- * trace_current_buffer_unlock_commit(event, irq_flags, pc);
- * }
- *
- * static int ftrace_raw_reg_event_<call>(void)
- * {
- * int ret;
- *
- * ret = register_trace_<call>(ftrace_raw_event_<call>);
- * if (!ret)
- * pr_info("event trace: Could not activate trace point "
- * "probe to <call>");
- * return ret;
- * }
- *
- * static void ftrace_unreg_event_<call>(void)
- * {
- * unregister_trace_<call>(ftrace_raw_event_<call>);
- * }
- *
- * static struct trace_event ftrace_event_type_<call> = {
- * .trace = ftrace_raw_output_<call>, <-- stage 2
- * };
- *
- * static int ftrace_raw_init_event_<call>(void)
- * {
- * int id;
- *
- * id = register_ftrace_event(&ftrace_event_type_<call>);
- * if (!id)
- * return -ENODEV;
- * event_<call>.id = id;
- * return 0;
- * }
- *
- * static struct ftrace_event_call __used
- * __attribute__((__aligned__(4)))
- * __attribute__((section("_ftrace_events"))) event_<call> = {
- * .name = "<call>",
- * .system = "<system>",
- * .raw_init = ftrace_raw_init_event_<call>,
- * .regfunc = ftrace_reg_event_<call>,
- * .unregfunc = ftrace_unreg_event_<call>,
- * .show_format = ftrace_format_<call>,
- * }
- *
- */
-
-#undef TP_FMT
-#define TP_FMT(fmt, args...) fmt "\n", ##args
-
-#ifdef CONFIG_EVENT_PROFILE
-#define _TRACE_PROFILE(call, proto, args) \
-static void ftrace_profile_##call(proto) \
-{ \
- extern void perf_tpcounter_event(int); \
- perf_tpcounter_event(event_##call.id); \
-} \
- \
-static int ftrace_profile_enable_##call(struct ftrace_event_call *call) \
-{ \
- int ret = 0; \
- \
- if (!atomic_inc_return(&call->profile_count)) \
- ret = register_trace_##call(ftrace_profile_##call); \
- \
- return ret; \
-} \
- \
-static void ftrace_profile_disable_##call(struct ftrace_event_call *call) \
-{ \
- if (atomic_add_negative(-1, &call->profile_count)) \
- unregister_trace_##call(ftrace_profile_##call); \
-}
-
-#define _TRACE_PROFILE_INIT(call) \
- .profile_count = ATOMIC_INIT(-1), \
- .profile_enable = ftrace_profile_enable_##call, \
- .profile_disable = ftrace_profile_disable_##call,
-
-#else
-#define _TRACE_PROFILE(call, proto, args)
-#define _TRACE_PROFILE_INIT(call)
-#endif
-
-#define _TRACE_FORMAT(call, proto, args, fmt) \
-static void ftrace_event_##call(proto) \
-{ \
- event_trace_printk(_RET_IP_, #call ": " fmt); \
-} \
- \
-static int ftrace_reg_event_##call(void) \
-{ \
- int ret; \
- \
- ret = register_trace_##call(ftrace_event_##call); \
- if (ret) \
- pr_info("event trace: Could not activate trace point " \
- "probe to " #call "\n"); \
- return ret; \
-} \
- \
-static void ftrace_unreg_event_##call(void) \
-{ \
- unregister_trace_##call(ftrace_event_##call); \
-} \
- \
-static struct ftrace_event_call event_##call; \
- \
-static int ftrace_init_event_##call(void) \
-{ \
- int id; \
- \
- id = register_ftrace_event(NULL); \
- if (!id) \
- return -ENODEV; \
- event_##call.id = id; \
- return 0; \
-}
-
-#undef TRACE_FORMAT
-#define TRACE_FORMAT(call, proto, args, fmt) \
-_TRACE_FORMAT(call, PARAMS(proto), PARAMS(args), PARAMS(fmt)) \
-_TRACE_PROFILE(call, PARAMS(proto), PARAMS(args)) \
-static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
-__attribute__((section("_ftrace_events"))) event_##call = { \
- .name = #call, \
- .system = __stringify(TRACE_SYSTEM), \
- .raw_init = ftrace_init_event_##call, \
- .regfunc = ftrace_reg_event_##call, \
- .unregfunc = ftrace_unreg_event_##call, \
- _TRACE_PROFILE_INIT(call) \
-}
-
-#undef __entry
-#define __entry entry
-
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
-_TRACE_PROFILE(call, PARAMS(proto), PARAMS(args)) \
- \
-static struct ftrace_event_call event_##call; \
- \
-static void ftrace_raw_event_##call(proto) \
-{ \
- struct ftrace_event_call *call = &event_##call; \
- struct ring_buffer_event *event; \
- struct ftrace_raw_##call *entry; \
- unsigned long irq_flags; \
- int pc; \
- \
- local_save_flags(irq_flags); \
- pc = preempt_count(); \
- \
- event = trace_current_buffer_lock_reserve(event_##call.id, \
- sizeof(struct ftrace_raw_##call), \
- irq_flags, pc); \
- if (!event) \
- return; \
- entry = ring_buffer_event_data(event); \
- \
- assign; \
- \
- if (call->preds && !filter_match_preds(call, entry)) \
- ring_buffer_event_discard(event); \
- \
- trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
- \
-} \
- \
-static int ftrace_raw_reg_event_##call(void) \
-{ \
- int ret; \
- \
- ret = register_trace_##call(ftrace_raw_event_##call); \
- if (ret) \
- pr_info("event trace: Could not activate trace point " \
- "probe to " #call "\n"); \
- return ret; \
-} \
- \
-static void ftrace_raw_unreg_event_##call(void) \
-{ \
- unregister_trace_##call(ftrace_raw_event_##call); \
-} \
- \
-static struct trace_event ftrace_event_type_##call = { \
- .trace = ftrace_raw_output_##call, \
-}; \
- \
-static int ftrace_raw_init_event_##call(void) \
-{ \
- int id; \
- \
- id = register_ftrace_event(&ftrace_event_type_##call); \
- if (!id) \
- return -ENODEV; \
- event_##call.id = id; \
- INIT_LIST_HEAD(&event_##call.fields); \
- return 0; \
-} \
- \
-static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
-__attribute__((section("_ftrace_events"))) event_##call = { \
- .name = #call, \
- .system = __stringify(TRACE_SYSTEM), \
- .raw_init = ftrace_raw_init_event_##call, \
- .regfunc = ftrace_raw_reg_event_##call, \
- .unregfunc = ftrace_raw_unreg_event_##call, \
- .show_format = ftrace_format_##call, \
- .define_fields = ftrace_define_fields_##call, \
- _TRACE_PROFILE_INIT(call) \
-}
-
-#include <trace/trace_event_types.h>
-
-#undef _TRACE_PROFILE
-#undef _TRACE_PROFILE_INIT
-
#undef TRACE_STRUCT
#define TRACE_STRUCT(args...) args
+extern void __bad_type_size(void);
+
#undef TRACE_FIELD
#define TRACE_FIELD(type, item, assign) \
+ if (sizeof(type) != sizeof(field.item)) \
+ __bad_type_size(); \
ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
"offset:%u;\tsize:%u;\n", \
(unsigned int)offsetof(typeof(field), item), \
#undef TRACE_FIELD_SPECIAL
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
+#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \
ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t" \
"offset:%u;\tsize:%u;\n", \
(unsigned int)offsetof(typeof(field), item), \
if (!ret) \
return 0;
+#undef TRACE_FIELD_SIGN
+#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
+ TRACE_FIELD(type, item, assign)
#undef TP_RAW_FMT
#define TP_RAW_FMT(args...) args
return ret; \
}
+#undef TRACE_EVENT_FORMAT_NOFILTER
+#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
+ tpfmt) \
+static int \
+ftrace_format_##call(struct trace_seq *s) \
+{ \
+ struct args field; \
+ int ret; \
+ \
+ tstruct; \
+ \
+ trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \
+ \
+ return ret; \
+}
+
#include "trace_event_types.h"
#undef TRACE_ZERO_CHAR
#define TRACE_FIELD(type, item, assign)\
entry->item = assign;
+#undef TRACE_FIELD_SIGN
+#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
+ TRACE_FIELD(type, item, assign)
+
#undef TP_CMD
#define TP_CMD(cmd...) cmd
#define TRACE_ENTRY entry
#undef TRACE_FIELD_SPECIAL
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
+#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \
cmd;
#undef TRACE_EVENT_FORMAT
#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
+int ftrace_define_fields_##call(void); \
+static int ftrace_raw_init_event_##call(void); \
+ \
+struct ftrace_event_call __used \
+__attribute__((__aligned__(4))) \
+__attribute__((section("_ftrace_events"))) event_##call = { \
+ .name = #call, \
+ .id = proto, \
+ .system = __stringify(TRACE_SYSTEM), \
+ .raw_init = ftrace_raw_init_event_##call, \
+ .show_format = ftrace_format_##call, \
+ .define_fields = ftrace_define_fields_##call, \
+}; \
+static int ftrace_raw_init_event_##call(void) \
+{ \
+ INIT_LIST_HEAD(&event_##call.fields); \
+ init_preds(&event_##call); \
+ return 0; \
+} \
+
+#undef TRACE_EVENT_FORMAT_NOFILTER
+#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
+ tpfmt) \
\
-static struct ftrace_event_call __used \
+struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.id = proto, \
.system = __stringify(TRACE_SYSTEM), \
.show_format = ftrace_format_##call, \
+};
+
+#include "trace_event_types.h"
+
+#undef TRACE_FIELD
+#define TRACE_FIELD(type, item, assign) \
+ ret = trace_define_field(event_call, #type, #item, \
+ offsetof(typeof(field), item), \
+ sizeof(field.item), is_signed_type(type)); \
+ if (ret) \
+ return ret;
+
+#undef TRACE_FIELD_SPECIAL
+#define TRACE_FIELD_SPECIAL(type, item, len, cmd) \
+ ret = trace_define_field(event_call, #type "[" #len "]", #item, \
+ offsetof(typeof(field), item), \
+ sizeof(field.item), 0); \
+ if (ret) \
+ return ret;
+
+#undef TRACE_FIELD_SIGN
+#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
+ ret = trace_define_field(event_call, #type, #item, \
+ offsetof(typeof(field), item), \
+ sizeof(field.item), is_signed); \
+ if (ret) \
+ return ret;
+
+#undef TRACE_FIELD_ZERO_CHAR
+#define TRACE_FIELD_ZERO_CHAR(item)
+
+#undef TRACE_EVENT_FORMAT
+#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
+int \
+ftrace_define_fields_##call(void) \
+{ \
+ struct ftrace_event_call *event_call = &event_##call; \
+ struct args field; \
+ int ret; \
+ \
+ __common_field(unsigned char, type, 0); \
+ __common_field(unsigned char, flags, 0); \
+ __common_field(unsigned char, preempt_count, 0); \
+ __common_field(int, pid, 1); \
+ __common_field(int, tgid, 1); \
+ \
+ tstruct; \
+ \
+ return ret; \
}
+
+#undef TRACE_EVENT_FORMAT_NOFILTER
+#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
+ tpfmt)
+
#include "trace_event_types.h"
if (!current->ret_stack)
return -EBUSY;
+ /*
+ * We must make sure the ret_stack is tested before we read
+ * anything else.
+ */
+ smp_rmb();
+
/* The return trace stack is full */
if (current->curr_ret_stack == FTRACE_RETFUNC_DEPTH - 1) {
atomic_inc(¤t->trace_overrun);
current->ret_stack[index].ret = ret;
current->ret_stack[index].func = func;
current->ret_stack[index].calltime = calltime;
+ current->ret_stack[index].subtime = 0;
*depth = index;
return 0;
}
/* Retrieve a function return address to the trace stack on thread info.*/
-void
+static void
ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret)
{
int index;
trace->calltime = current->ret_stack[index].calltime;
trace->overrun = atomic_read(¤t->trace_overrun);
trace->depth = index;
- barrier();
- current->curr_ret_stack--;
-
}
/*
ftrace_pop_return_trace(&trace, &ret);
trace.rettime = trace_clock_local();
ftrace_graph_return(&trace);
+ barrier();
+ current->curr_ret_stack--;
if (unlikely(!ret)) {
ftrace_graph_stop();
return TRACE_TYPE_HANDLED;
}
-static enum print_line_t
-print_graph_duration(unsigned long long duration, struct trace_seq *s)
+enum print_line_t
+trace_print_graph_duration(unsigned long long duration, struct trace_seq *s)
{
unsigned long nsecs_rem = do_div(duration, 1000);
/* log10(ULONG_MAX) + '\0' */
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
}
+ return TRACE_TYPE_HANDLED;
+}
+
+static enum print_line_t
+print_graph_duration(unsigned long long duration, struct trace_seq *s)
+{
+ int ret;
+
+ ret = trace_print_graph_duration(duration, s);
+ if (ret != TRACE_TYPE_HANDLED)
+ return ret;
ret = trace_seq_printf(s, "| ");
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
- return TRACE_TYPE_HANDLED;
+ return TRACE_TYPE_HANDLED;
}
/* Case of a leaf function on its call entry */
/*
- * h/w branch tracer for x86 based on bts
+ * h/w branch tracer for x86 based on BTS
*
* Copyright (C) 2008-2009 Intel Corporation.
* Markus Metzger <markus.t.metzger@gmail.com>, 2008-2009
*/
-#include <linux/spinlock.h>
#include <linux/kallsyms.h>
#include <linux/debugfs.h>
#include <linux/ftrace.h>
#include <asm/ds.h>
-#include "trace.h"
#include "trace_output.h"
+#include "trace.h"
-#define SIZEOF_BTS (1 << 13)
+#define BTS_BUFFER_SIZE (1 << 13)
-/*
- * The tracer lock protects the below per-cpu tracer array.
- * It needs to be held to:
- * - start tracing on all cpus
- * - stop tracing on all cpus
- * - start tracing on a single hotplug cpu
- * - stop tracing on a single hotplug cpu
- * - read the trace from all cpus
- * - read the trace from a single cpu
- */
-static DEFINE_SPINLOCK(bts_tracer_lock);
static DEFINE_PER_CPU(struct bts_tracer *, tracer);
-static DEFINE_PER_CPU(unsigned char[SIZEOF_BTS], buffer);
+static DEFINE_PER_CPU(unsigned char[BTS_BUFFER_SIZE], buffer);
#define this_tracer per_cpu(tracer, smp_processor_id())
-#define this_buffer per_cpu(buffer, smp_processor_id())
-static int __read_mostly trace_hw_branches_enabled;
+static int trace_hw_branches_enabled __read_mostly;
+static int trace_hw_branches_suspended __read_mostly;
static struct trace_array *hw_branch_trace __read_mostly;
-/*
- * Start tracing on the current cpu.
- * The argument is ignored.
- *
- * pre: bts_tracer_lock must be locked.
- */
-static void bts_trace_start_cpu(void *arg)
+static void bts_trace_init_cpu(int cpu)
{
- if (this_tracer)
- ds_release_bts(this_tracer);
-
- this_tracer =
- ds_request_bts(/* task = */ NULL, this_buffer, SIZEOF_BTS,
- /* ovfl = */ NULL, /* th = */ (size_t)-1,
- BTS_KERNEL);
- if (IS_ERR(this_tracer)) {
- this_tracer = NULL;
- return;
- }
+ per_cpu(tracer, cpu) =
+ ds_request_bts_cpu(cpu, per_cpu(buffer, cpu), BTS_BUFFER_SIZE,
+ NULL, (size_t)-1, BTS_KERNEL);
+
+ if (IS_ERR(per_cpu(tracer, cpu)))
+ per_cpu(tracer, cpu) = NULL;
}
-static void bts_trace_start(struct trace_array *tr)
+static int bts_trace_init(struct trace_array *tr)
{
- spin_lock(&bts_tracer_lock);
+ int cpu;
+
+ hw_branch_trace = tr;
+ trace_hw_branches_enabled = 0;
- on_each_cpu(bts_trace_start_cpu, NULL, 1);
- trace_hw_branches_enabled = 1;
+ get_online_cpus();
+ for_each_online_cpu(cpu) {
+ bts_trace_init_cpu(cpu);
- spin_unlock(&bts_tracer_lock);
+ if (likely(per_cpu(tracer, cpu)))
+ trace_hw_branches_enabled = 1;
+ }
+ trace_hw_branches_suspended = 0;
+ put_online_cpus();
+
+ /* If we could not enable tracing on a single cpu, we fail. */
+ return trace_hw_branches_enabled ? 0 : -EOPNOTSUPP;
}
-/*
- * Stop tracing on the current cpu.
- * The argument is ignored.
- *
- * pre: bts_tracer_lock must be locked.
- */
-static void bts_trace_stop_cpu(void *arg)
+static void bts_trace_reset(struct trace_array *tr)
{
- if (this_tracer) {
- ds_release_bts(this_tracer);
- this_tracer = NULL;
+ int cpu;
+
+ get_online_cpus();
+ for_each_online_cpu(cpu) {
+ if (likely(per_cpu(tracer, cpu))) {
+ ds_release_bts(per_cpu(tracer, cpu));
+ per_cpu(tracer, cpu) = NULL;
+ }
}
+ trace_hw_branches_enabled = 0;
+ trace_hw_branches_suspended = 0;
+ put_online_cpus();
}
-static void bts_trace_stop(struct trace_array *tr)
+static void bts_trace_start(struct trace_array *tr)
{
- spin_lock(&bts_tracer_lock);
+ int cpu;
- trace_hw_branches_enabled = 0;
- on_each_cpu(bts_trace_stop_cpu, NULL, 1);
+ get_online_cpus();
+ for_each_online_cpu(cpu)
+ if (likely(per_cpu(tracer, cpu)))
+ ds_resume_bts(per_cpu(tracer, cpu));
+ trace_hw_branches_suspended = 0;
+ put_online_cpus();
+}
- spin_unlock(&bts_tracer_lock);
+static void bts_trace_stop(struct trace_array *tr)
+{
+ int cpu;
+
+ get_online_cpus();
+ for_each_online_cpu(cpu)
+ if (likely(per_cpu(tracer, cpu)))
+ ds_suspend_bts(per_cpu(tracer, cpu));
+ trace_hw_branches_suspended = 1;
+ put_online_cpus();
}
static int __cpuinit bts_hotcpu_handler(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
- unsigned int cpu = (unsigned long)hcpu;
-
- spin_lock(&bts_tracer_lock);
-
- if (!trace_hw_branches_enabled)
- goto out;
+ int cpu = (long)hcpu;
switch (action) {
case CPU_ONLINE:
case CPU_DOWN_FAILED:
- smp_call_function_single(cpu, bts_trace_start_cpu, NULL, 1);
+ /* The notification is sent with interrupts enabled. */
+ if (trace_hw_branches_enabled) {
+ bts_trace_init_cpu(cpu);
+
+ if (trace_hw_branches_suspended &&
+ likely(per_cpu(tracer, cpu)))
+ ds_suspend_bts(per_cpu(tracer, cpu));
+ }
break;
+
case CPU_DOWN_PREPARE:
- smp_call_function_single(cpu, bts_trace_stop_cpu, NULL, 1);
- break;
+ /* The notification is sent with interrupts enabled. */
+ if (likely(per_cpu(tracer, cpu))) {
+ ds_release_bts(per_cpu(tracer, cpu));
+ per_cpu(tracer, cpu) = NULL;
+ }
}
- out:
- spin_unlock(&bts_tracer_lock);
return NOTIFY_DONE;
}
.notifier_call = bts_hotcpu_handler
};
-static int bts_trace_init(struct trace_array *tr)
-{
- hw_branch_trace = tr;
-
- bts_trace_start(tr);
-
- return 0;
-}
-
-static void bts_trace_reset(struct trace_array *tr)
-{
- bts_trace_stop(tr);
-}
-
static void bts_trace_print_header(struct seq_file *m)
{
seq_puts(m, "# CPU# TO <- FROM\n");
static enum print_line_t bts_trace_print_line(struct trace_iterator *iter)
{
+ unsigned long symflags = TRACE_ITER_SYM_OFFSET;
struct trace_entry *entry = iter->ent;
struct trace_seq *seq = &iter->seq;
struct hw_branch_entry *it;
- unsigned long symflags = TRACE_ITER_SYM_OFFSET;
trace_assign_type(it, entry);
void trace_hw_branch(u64 from, u64 to)
{
+ struct ftrace_event_call *call = &event_hw_branch;
struct trace_array *tr = hw_branch_trace;
struct ring_buffer_event *event;
struct hw_branch_entry *entry;
entry->ent.type = TRACE_HW_BRANCHES;
entry->from = from;
entry->to = to;
- trace_buffer_unlock_commit(tr, event, 0, 0);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ trace_buffer_unlock_commit(tr, event, 0, 0);
out:
atomic_dec(&tr->data[cpu]->disabled);
/*
* Collect the trace on the current cpu and write it into the ftrace buffer.
*
- * pre: bts_tracer_lock must be locked
+ * pre: tracing must be suspended on the current cpu
*/
static void trace_bts_cpu(void *arg)
{
- struct trace_array *tr = (struct trace_array *) arg;
+ struct trace_array *tr = (struct trace_array *)arg;
const struct bts_trace *trace;
unsigned char *at;
if (unlikely(!this_tracer))
return;
- ds_suspend_bts(this_tracer);
trace = ds_read_bts(this_tracer);
if (!trace)
- goto out;
+ return;
for (at = trace->ds.top; (void *)at < trace->ds.end;
at += trace->ds.size)
for (at = trace->ds.begin; (void *)at < trace->ds.top;
at += trace->ds.size)
trace_bts_at(trace, at);
-
-out:
- ds_resume_bts(this_tracer);
}
static void trace_bts_prepare(struct trace_iterator *iter)
{
- spin_lock(&bts_tracer_lock);
+ int cpu;
+ get_online_cpus();
+ for_each_online_cpu(cpu)
+ if (likely(per_cpu(tracer, cpu)))
+ ds_suspend_bts(per_cpu(tracer, cpu));
+ /*
+ * We need to collect the trace on the respective cpu since ftrace
+ * implicitly adds the record for the current cpu.
+ * Once that is more flexible, we could collect the data from any cpu.
+ */
on_each_cpu(trace_bts_cpu, iter->tr, 1);
- spin_unlock(&bts_tracer_lock);
+ for_each_online_cpu(cpu)
+ if (likely(per_cpu(tracer, cpu)))
+ ds_resume_bts(per_cpu(tracer, cpu));
+ put_online_cpus();
}
static void trace_bts_close(struct trace_iterator *iter)
void trace_hw_branch_oops(void)
{
- spin_lock(&bts_tracer_lock);
-
- trace_bts_cpu(hw_branch_trace);
-
- spin_unlock(&bts_tracer_lock);
+ if (this_tracer) {
+ ds_suspend_bts_noirq(this_tracer);
+ trace_bts_cpu(hw_branch_trace);
+ ds_resume_bts_noirq(this_tracer);
+ }
}
struct tracer bts_tracer __read_mostly =
.start = bts_trace_start,
.stop = bts_trace_stop,
.open = trace_bts_prepare,
- .close = trace_bts_close
+ .close = trace_bts_close,
+#ifdef CONFIG_FTRACE_SELFTEST
+ .selftest = trace_selftest_startup_hw_branches,
+#endif /* CONFIG_FTRACE_SELFTEST */
};
__init static int init_bts_trace(void)
#include <linux/kernel.h>
#include <linux/mmiotrace.h>
#include <linux/pci.h>
+#include <linux/time.h>
+
#include <asm/atomic.h>
#include "trace.h"
struct mmiotrace_rw *rw;
struct trace_seq *s = &iter->seq;
unsigned long long t = ns2usecs(iter->ts);
- unsigned long usec_rem = do_div(t, 1000000ULL);
+ unsigned long usec_rem = do_div(t, USEC_PER_SEC);
unsigned secs = (unsigned long)t;
int ret = 1;
struct mmiotrace_map *m;
struct trace_seq *s = &iter->seq;
unsigned long long t = ns2usecs(iter->ts);
- unsigned long usec_rem = do_div(t, 1000000ULL);
+ unsigned long usec_rem = do_div(t, USEC_PER_SEC);
unsigned secs = (unsigned long)t;
int ret;
/* must be a power of 2 */
#define EVENT_HASHSIZE 128
-static DEFINE_MUTEX(trace_event_mutex);
+DECLARE_RWSEM(trace_event_mutex);
+
+DEFINE_PER_CPU(struct trace_seq, ftrace_event_seq);
+EXPORT_PER_CPU_SYMBOL(ftrace_event_seq);
+
static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
static int next_event_type = __TRACE_LAST_TYPE + 1;
+void trace_print_seq(struct seq_file *m, struct trace_seq *s)
+{
+ int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
+
+ s->buffer[len] = 0;
+ seq_puts(m, s->buffer);
+
+ trace_seq_init(s);
+}
+
enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
return len;
}
+EXPORT_SYMBOL_GPL(trace_seq_printf);
+
+/**
+ * trace_seq_vprintf - sequence printing of trace information
+ * @s: trace sequence descriptor
+ * @fmt: printf format string
+ *
+ * The tracer may use either sequence operations or its own
+ * copy to user routines. To simplify formating of a trace
+ * trace_seq_printf is used to store strings into a special
+ * buffer (@s). Then the output may be either used by
+ * the sequencer or pulled into another buffer.
+ */
+int
+trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
+{
+ int len = (PAGE_SIZE - 1) - s->len;
+ int ret;
+
+ if (!len)
+ return 0;
+
+ ret = vsnprintf(s->buffer + s->len, len, fmt, args);
+
+ /* If we can't write it all, don't bother writing anything */
+ if (ret >= len)
+ return 0;
+
+ s->len += ret;
+
+ return len;
+}
+EXPORT_SYMBOL_GPL(trace_seq_vprintf);
int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
{
return 0;
}
+const char *
+ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
+ unsigned long flags,
+ const struct trace_print_flags *flag_array)
+{
+ unsigned long mask;
+ const char *str;
+ const char *ret = p->buffer + p->len;
+ int i;
+
+ for (i = 0; flag_array[i].name && flags; i++) {
+
+ mask = flag_array[i].mask;
+ if ((flags & mask) != mask)
+ continue;
+
+ str = flag_array[i].name;
+ flags &= ~mask;
+ if (p->len && delim)
+ trace_seq_puts(p, delim);
+ trace_seq_puts(p, str);
+ }
+
+ /* check for left over flags */
+ if (flags) {
+ if (p->len && delim)
+ trace_seq_puts(p, delim);
+ trace_seq_printf(p, "0x%lx", flags);
+ }
+
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+EXPORT_SYMBOL(ftrace_print_flags_seq);
+
+const char *
+ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
+ const struct trace_print_flags *symbol_array)
+{
+ int i;
+ const char *ret = p->buffer + p->len;
+
+ for (i = 0; symbol_array[i].name; i++) {
+
+ if (val != symbol_array[i].mask)
+ continue;
+
+ trace_seq_puts(p, symbol_array[i].name);
+ break;
+ }
+
+ if (!p->len)
+ trace_seq_printf(p, "0x%lx", val);
+
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+EXPORT_SYMBOL(ftrace_print_symbols_seq);
+
#ifdef CONFIG_KRETPROBES
static inline const char *kretprobed(const char *name)
{
if (ip == ULONG_MAX || !ret)
break;
- if (i && ret)
- ret = trace_seq_puts(s, " <- ");
+ if (ret)
+ ret = trace_seq_puts(s, " => ");
if (!ip) {
if (ret)
ret = trace_seq_puts(s, "??");
+ if (ret)
+ ret = trace_seq_puts(s, "\n");
continue;
}
if (!ret)
break;
if (ret)
ret = seq_print_user_ip(s, mm, ip, sym_flags);
+ ret = trace_seq_puts(s, "\n");
}
if (mm)
* @type: the type of event to look for
*
* Returns an event of type @type otherwise NULL
+ * Called with trace_event_read_lock() held.
*/
struct trace_event *ftrace_find_event(int type)
{
key = type & (EVENT_HASHSIZE - 1);
- hlist_for_each_entry_rcu(event, n, &event_hash[key], node) {
+ hlist_for_each_entry(event, n, &event_hash[key], node) {
if (event->type == type)
return event;
}
return NULL;
}
+static LIST_HEAD(ftrace_event_list);
+
+static int trace_search_list(struct list_head **list)
+{
+ struct trace_event *e;
+ int last = __TRACE_LAST_TYPE;
+
+ if (list_empty(&ftrace_event_list)) {
+ *list = &ftrace_event_list;
+ return last + 1;
+ }
+
+ /*
+ * We used up all possible max events,
+ * lets see if somebody freed one.
+ */
+ list_for_each_entry(e, &ftrace_event_list, list) {
+ if (e->type != last + 1)
+ break;
+ last++;
+ }
+
+ /* Did we used up all 65 thousand events??? */
+ if ((last + 1) > FTRACE_MAX_EVENT)
+ return 0;
+
+ *list = &e->list;
+ return last + 1;
+}
+
+void trace_event_read_lock(void)
+{
+ down_read(&trace_event_mutex);
+}
+
+void trace_event_read_unlock(void)
+{
+ up_read(&trace_event_mutex);
+}
+
/**
* register_ftrace_event - register output for an event type
* @event: the event type to register
unsigned key;
int ret = 0;
- mutex_lock(&trace_event_mutex);
+ down_write(&trace_event_mutex);
- if (!event) {
- ret = next_event_type++;
+ if (WARN_ON(!event))
goto out;
- }
- if (!event->type)
- event->type = next_event_type++;
- else if (event->type > __TRACE_LAST_TYPE) {
+ INIT_LIST_HEAD(&event->list);
+
+ if (!event->type) {
+ struct list_head *list = NULL;
+
+ if (next_event_type > FTRACE_MAX_EVENT) {
+
+ event->type = trace_search_list(&list);
+ if (!event->type)
+ goto out;
+
+ } else {
+
+ event->type = next_event_type++;
+ list = &ftrace_event_list;
+ }
+
+ if (WARN_ON(ftrace_find_event(event->type)))
+ goto out;
+
+ list_add_tail(&event->list, list);
+
+ } else if (event->type > __TRACE_LAST_TYPE) {
printk(KERN_WARNING "Need to add type to trace.h\n");
WARN_ON(1);
- }
-
- if (ftrace_find_event(event->type))
goto out;
+ } else {
+ /* Is this event already used */
+ if (ftrace_find_event(event->type))
+ goto out;
+ }
if (event->trace == NULL)
event->trace = trace_nop_print;
key = event->type & (EVENT_HASHSIZE - 1);
- hlist_add_head_rcu(&event->node, &event_hash[key]);
+ hlist_add_head(&event->node, &event_hash[key]);
ret = event->type;
out:
- mutex_unlock(&trace_event_mutex);
+ up_write(&trace_event_mutex);
return ret;
}
+EXPORT_SYMBOL_GPL(register_ftrace_event);
+
+/*
+ * Used by module code with the trace_event_mutex held for write.
+ */
+int __unregister_ftrace_event(struct trace_event *event)
+{
+ hlist_del(&event->node);
+ list_del(&event->list);
+ return 0;
+}
/**
* unregister_ftrace_event - remove a no longer used event
*/
int unregister_ftrace_event(struct trace_event *event)
{
- mutex_lock(&trace_event_mutex);
- hlist_del(&event->node);
- mutex_unlock(&trace_event_mutex);
+ down_write(&trace_event_mutex);
+ __unregister_ftrace_event(event);
+ up_write(&trace_event_mutex);
return 0;
}
+EXPORT_SYMBOL_GPL(unregister_ftrace_event);
/*
* Standard events
trace_assign_type(field, iter->ent);
+ if (!trace_seq_puts(s, "<stack trace>\n"))
+ goto partial;
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
- if (i) {
- if (!trace_seq_puts(s, " <= "))
- goto partial;
+ if (!field->caller[i] || (field->caller[i] == ULONG_MAX))
+ break;
+ if (!trace_seq_puts(s, " => "))
+ goto partial;
- if (!seq_print_ip_sym(s, field->caller[i], flags))
- goto partial;
- }
+ if (!seq_print_ip_sym(s, field->caller[i], flags))
+ goto partial;
if (!trace_seq_puts(s, "\n"))
goto partial;
}
trace_assign_type(field, iter->ent);
- if (!seq_print_userip_objs(field, s, flags))
+ if (!trace_seq_puts(s, "<user stack trace>\n"))
goto partial;
- if (!trace_seq_putc(s, '\n'))
+ if (!seq_print_userip_objs(field, s, flags))
goto partial;
return TRACE_TYPE_HANDLED;
#ifndef __TRACE_EVENTS_H
#define __TRACE_EVENTS_H
+#include <linux/trace_seq.h>
#include "trace.h"
-typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
- int flags);
-
-struct trace_event {
- struct hlist_node node;
- int type;
- trace_print_func trace;
- trace_print_func raw;
- trace_print_func hex;
- trace_print_func binary;
-};
-
extern enum print_line_t
trace_print_bprintk_msg_only(struct trace_iterator *iter);
extern enum print_line_t
trace_print_printk_msg_only(struct trace_iterator *iter);
-extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
- __attribute__ ((format (printf, 2, 3)));
-extern int
-trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
extern int
seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
unsigned long sym_flags);
-extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
- size_t cnt);
-extern int trace_seq_puts(struct trace_seq *s, const char *str);
-extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
-extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
-extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
- size_t len);
-extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
-extern int trace_seq_path(struct trace_seq *s, struct path *path);
extern int seq_print_userip_objs(const struct userstack_entry *entry,
struct trace_seq *s, unsigned long sym_flags);
extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
extern int trace_print_context(struct trace_iterator *iter);
extern int trace_print_lat_context(struct trace_iterator *iter);
+extern void trace_event_read_lock(void);
+extern void trace_event_read_unlock(void);
extern struct trace_event *ftrace_find_event(int type);
-extern int register_ftrace_event(struct trace_event *event);
-extern int unregister_ftrace_event(struct trace_event *event);
extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
int flags);
+/* used by module unregistering */
+extern int __unregister_ftrace_event(struct trace_event *event);
+extern struct rw_semaphore trace_event_mutex;
+
#define MAX_MEMHEX_BYTES 8
#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
static void probe_power_end(struct power_trace *it)
{
+ struct ftrace_event_call *call = &event_power;
struct ring_buffer_event *event;
struct trace_power *entry;
struct trace_array_cpu *data;
goto out;
entry = ring_buffer_event_data(event);
entry->state_data = *it;
- trace_buffer_unlock_commit(tr, event, 0, 0);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ trace_buffer_unlock_commit(tr, event, 0, 0);
out:
preempt_enable();
}
static void probe_power_mark(struct power_trace *it, unsigned int type,
unsigned int level)
{
+ struct ftrace_event_call *call = &event_power;
struct ring_buffer_event *event;
struct trace_power *entry;
struct trace_array_cpu *data;
goto out;
entry = ring_buffer_event_data(event);
entry->state_data = *it;
- trace_buffer_unlock_commit(tr, event, 0, 0);
+ if (!filter_check_discard(call, entry, tr->buffer, event))
+ trace_buffer_unlock_commit(tr, event, 0, 0);
out:
preempt_enable();
}
static __init int init_trace_printk_function_export(void)
{
struct dentry *d_tracer;
- struct dentry *entry;
d_tracer = tracing_init_dentry();
if (!d_tracer)
return 0;
- entry = debugfs_create_file("printk_formats", 0444, d_tracer,
+ trace_create_file("printk_formats", 0444, d_tracer,
NULL, &ftrace_formats_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'printk_formats' entry\n");
return 0;
}
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
-#include <trace/sched.h>
+#include <trace/events/sched.h>
#include "trace.h"
int cpu;
int pc;
- if (!sched_ref || sched_stopped)
+ if (unlikely(!sched_ref))
return;
tracing_record_cmdline(prev);
tracing_record_cmdline(next);
- if (!tracer_enabled)
+ if (!tracer_enabled || sched_stopped)
return;
pc = preempt_count();
unsigned long flags;
int cpu, pc;
- if (!likely(tracer_enabled))
+ if (unlikely(!sched_ref))
return;
- pc = preempt_count();
tracing_record_cmdline(current);
- if (sched_stopped)
+ if (!tracer_enabled || sched_stopped)
return;
+ pc = preempt_count();
local_irq_save(flags);
cpu = raw_smp_processor_id();
data = ctx_trace->data[cpu];
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
-#include <trace/sched.h>
+#include <trace/events/sched.h>
#include "trace.h"
pc = preempt_count();
- /* The task we are waiting for is waking up */
- data = wakeup_trace->data[wakeup_cpu];
-
/* disable local data, not wakeup_cpu data */
cpu = raw_smp_processor_id();
disabled = atomic_inc_return(&wakeup_trace->data[cpu]->disabled);
if (unlikely(!tracer_enabled || next != wakeup_task))
goto out_unlock;
+ /* The task we are waiting for is waking up */
+ data = wakeup_trace->data[wakeup_cpu];
+
trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc);
tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc);
case TRACE_BRANCH:
case TRACE_GRAPH_ENT:
case TRACE_GRAPH_RET:
+ case TRACE_HW_BRANCHES:
return 1;
}
return 0;
#else
# define trace_selftest_startup_dynamic_tracing(trace, tr, func) ({ 0; })
#endif /* CONFIG_DYNAMIC_FTRACE */
+
/*
* Simple verification test of ftrace function tracer.
* Enable ftrace, sleep 1/10 second, and then read the trace
return ret;
}
#endif /* CONFIG_BRANCH_TRACER */
+
+#ifdef CONFIG_HW_BRANCH_TRACER
+int
+trace_selftest_startup_hw_branches(struct tracer *trace,
+ struct trace_array *tr)
+{
+ struct trace_iterator *iter;
+ struct tracer tracer;
+ unsigned long count;
+ int ret;
+
+ if (!trace->open) {
+ printk(KERN_CONT "missing open function...");
+ return -1;
+ }
+
+ ret = tracer_init(trace, tr);
+ if (ret) {
+ warn_failed_init_tracer(trace, ret);
+ return ret;
+ }
+
+ /*
+ * The hw-branch tracer needs to collect the trace from the various
+ * cpu trace buffers - before tracing is stopped.
+ */
+ iter = kzalloc(sizeof(*iter), GFP_KERNEL);
+ if (!iter)
+ return -ENOMEM;
+
+ memcpy(&tracer, trace, sizeof(tracer));
+
+ iter->trace = &tracer;
+ iter->tr = tr;
+ iter->pos = -1;
+ mutex_init(&iter->mutex);
+
+ trace->open(iter);
+
+ mutex_destroy(&iter->mutex);
+ kfree(iter);
+
+ tracing_stop();
+
+ ret = trace_test_buffer(tr, &count);
+ trace->reset(tr);
+ tracing_start();
+
+ if (!ret && !count) {
+ printk(KERN_CONT "no entries found..");
+ ret = -1;
+ }
+
+ return ret;
+}
+#endif /* CONFIG_HW_BRANCH_TRACER */
seq_printf(m, " Depth Size Location"
" (%d entries)\n"
" ----- ---- --------\n",
- max_stack_trace.nr_entries);
+ max_stack_trace.nr_entries - 1);
if (!stack_tracer_enabled && !max_stack_size)
print_disabled(m);
static __init int stack_trace_init(void)
{
struct dentry *d_tracer;
- struct dentry *entry;
d_tracer = tracing_init_dentry();
- entry = debugfs_create_file("stack_max_size", 0644, d_tracer,
- &max_stack_size, &stack_max_size_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'stack_max_size' entry\n");
+ trace_create_file("stack_max_size", 0644, d_tracer,
+ &max_stack_size, &stack_max_size_fops);
- entry = debugfs_create_file("stack_trace", 0444, d_tracer,
- NULL, &stack_trace_fops);
- if (!entry)
- pr_warning("Could not create debugfs 'stack_trace' entry\n");
+ trace_create_file("stack_trace", 0444, d_tracer,
+ NULL, &stack_trace_fops);
if (stack_tracer_enabled)
register_ftrace_function(&trace_ops);
/*
* Infrastructure for statistic tracing (histogram output).
*
- * Copyright (C) 2008 Frederic Weisbecker <fweisbec@gmail.com>
+ * Copyright (C) 2008-2009 Frederic Weisbecker <fweisbec@gmail.com>
*
* Based on the code from trace_branch.c which is
* Copyright (C) 2008 Steven Rostedt <srostedt@redhat.com>
#include <linux/list.h>
+#include <linux/rbtree.h>
#include <linux/debugfs.h>
#include "trace_stat.h"
#include "trace.h"
-/* List of stat entries from a tracer */
-struct trace_stat_list {
- struct list_head list;
+/*
+ * List of stat red-black nodes from a tracer
+ * We use a such tree to sort quickly the stat
+ * entries from the tracer.
+ */
+struct stat_node {
+ struct rb_node node;
void *stat;
};
/* A stat session is the stats output in one file */
-struct tracer_stat_session {
+struct stat_session {
struct list_head session_list;
struct tracer_stat *ts;
- struct list_head stat_list;
+ struct rb_root stat_root;
struct mutex stat_mutex;
struct dentry *file;
};
/* The root directory for all stat files */
static struct dentry *stat_dir;
+/*
+ * Iterate through the rbtree using a post order traversal path
+ * to release the next node.
+ * It won't necessary release one at each iteration
+ * but it will at least advance closer to the next one
+ * to be released.
+ */
+static struct rb_node *release_next(struct rb_node *node)
+{
+ struct stat_node *snode;
+ struct rb_node *parent = rb_parent(node);
+
+ if (node->rb_left)
+ return node->rb_left;
+ else if (node->rb_right)
+ return node->rb_right;
+ else {
+ if (!parent)
+ ;
+ else if (parent->rb_left == node)
+ parent->rb_left = NULL;
+ else
+ parent->rb_right = NULL;
+
+ snode = container_of(node, struct stat_node, node);
+ kfree(snode);
+
+ return parent;
+ }
+}
-static void reset_stat_session(struct tracer_stat_session *session)
+static void reset_stat_session(struct stat_session *session)
{
- struct trace_stat_list *node, *next;
+ struct rb_node *node = session->stat_root.rb_node;
- list_for_each_entry_safe(node, next, &session->stat_list, list)
- kfree(node);
+ while (node)
+ node = release_next(node);
- INIT_LIST_HEAD(&session->stat_list);
+ session->stat_root = RB_ROOT;
}
-static void destroy_session(struct tracer_stat_session *session)
+static void destroy_session(struct stat_session *session)
{
debugfs_remove(session->file);
reset_stat_session(session);
kfree(session);
}
+typedef int (*cmp_stat_t)(void *, void *);
+
+static int insert_stat(struct rb_root *root, void *stat, cmp_stat_t cmp)
+{
+ struct rb_node **new = &(root->rb_node), *parent = NULL;
+ struct stat_node *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ data->stat = stat;
+
+ /*
+ * Figure out where to put new node
+ * This is a descendent sorting
+ */
+ while (*new) {
+ struct stat_node *this;
+ int result;
+
+ this = container_of(*new, struct stat_node, node);
+ result = cmp(data->stat, this->stat);
+
+ parent = *new;
+ if (result >= 0)
+ new = &((*new)->rb_left);
+ else
+ new = &((*new)->rb_right);
+ }
+
+ rb_link_node(&data->node, parent, new);
+ rb_insert_color(&data->node, root);
+ return 0;
+}
+
/*
* For tracers that don't provide a stat_cmp callback.
- * This one will force an immediate insertion on tail of
- * the list.
+ * This one will force an insertion as right-most node
+ * in the rbtree.
*/
static int dummy_cmp(void *p1, void *p2)
{
- return 1;
+ return -1;
}
/*
- * Initialize the stat list at each trace_stat file opening.
+ * Initialize the stat rbtree at each trace_stat file opening.
* All of these copies and sorting are required on all opening
* since the stats could have changed between two file sessions.
*/
-static int stat_seq_init(struct tracer_stat_session *session)
+static int stat_seq_init(struct stat_session *session)
{
- struct trace_stat_list *iter_entry, *new_entry;
struct tracer_stat *ts = session->ts;
+ struct rb_root *root = &session->stat_root;
void *stat;
int ret = 0;
int i;
if (!ts->stat_cmp)
ts->stat_cmp = dummy_cmp;
- stat = ts->stat_start();
+ stat = ts->stat_start(ts);
if (!stat)
goto exit;
- /*
- * The first entry. Actually this is the second, but the first
- * one (the stat_list head) is pointless.
- */
- new_entry = kmalloc(sizeof(struct trace_stat_list), GFP_KERNEL);
- if (!new_entry) {
- ret = -ENOMEM;
+ ret = insert_stat(root, stat, ts->stat_cmp);
+ if (ret)
goto exit;
- }
-
- INIT_LIST_HEAD(&new_entry->list);
-
- list_add(&new_entry->list, &session->stat_list);
-
- new_entry->stat = stat;
/*
- * Iterate over the tracer stat entries and store them in a sorted
- * list.
+ * Iterate over the tracer stat entries and store them in an rbtree.
*/
for (i = 1; ; i++) {
stat = ts->stat_next(stat, i);
if (!stat)
break;
- new_entry = kmalloc(sizeof(struct trace_stat_list), GFP_KERNEL);
- if (!new_entry) {
- ret = -ENOMEM;
- goto exit_free_list;
- }
-
- INIT_LIST_HEAD(&new_entry->list);
- new_entry->stat = stat;
-
- list_for_each_entry_reverse(iter_entry, &session->stat_list,
- list) {
-
- /* Insertion with a descendent sorting */
- if (ts->stat_cmp(iter_entry->stat,
- new_entry->stat) >= 0) {
-
- list_add(&new_entry->list, &iter_entry->list);
- break;
- }
- }
-
- /* The current larger value */
- if (list_empty(&new_entry->list))
- list_add(&new_entry->list, &session->stat_list);
+ ret = insert_stat(root, stat, ts->stat_cmp);
+ if (ret)
+ goto exit_free_rbtree;
}
+
exit:
mutex_unlock(&session->stat_mutex);
return ret;
-exit_free_list:
+exit_free_rbtree:
reset_stat_session(session);
mutex_unlock(&session->stat_mutex);
return ret;
static void *stat_seq_start(struct seq_file *s, loff_t *pos)
{
- struct tracer_stat_session *session = s->private;
+ struct stat_session *session = s->private;
+ struct rb_node *node;
+ int i;
- /* Prevent from tracer switch or stat_list modification */
+ /* Prevent from tracer switch or rbtree modification */
mutex_lock(&session->stat_mutex);
/* If we are in the beginning of the file, print the headers */
- if (!*pos && session->ts->stat_headers)
+ if (!*pos && session->ts->stat_headers) {
+ (*pos)++;
return SEQ_START_TOKEN;
+ }
- return seq_list_start(&session->stat_list, *pos);
+ node = rb_first(&session->stat_root);
+ for (i = 0; node && i < *pos; i++)
+ node = rb_next(node);
+
+ (*pos)++;
+
+ return node;
}
static void *stat_seq_next(struct seq_file *s, void *p, loff_t *pos)
{
- struct tracer_stat_session *session = s->private;
+ struct stat_session *session = s->private;
+ struct rb_node *node = p;
+
+ (*pos)++;
if (p == SEQ_START_TOKEN)
- return seq_list_start(&session->stat_list, *pos);
+ return rb_first(&session->stat_root);
- return seq_list_next(p, &session->stat_list, pos);
+ return rb_next(node);
}
static void stat_seq_stop(struct seq_file *s, void *p)
{
- struct tracer_stat_session *session = s->private;
+ struct stat_session *session = s->private;
mutex_unlock(&session->stat_mutex);
}
static int stat_seq_show(struct seq_file *s, void *v)
{
- struct tracer_stat_session *session = s->private;
- struct trace_stat_list *l = list_entry(v, struct trace_stat_list, list);
+ struct stat_session *session = s->private;
+ struct stat_node *l = container_of(v, struct stat_node, node);
if (v == SEQ_START_TOKEN)
return session->ts->stat_headers(s);
{
int ret;
- struct tracer_stat_session *session = inode->i_private;
+ struct stat_session *session = inode->i_private;
ret = seq_open(file, &trace_stat_seq_ops);
if (!ret) {
}
/*
- * Avoid consuming memory with our now useless list.
+ * Avoid consuming memory with our now useless rbtree.
*/
static int tracing_stat_release(struct inode *i, struct file *f)
{
- struct tracer_stat_session *session = i->i_private;
+ struct stat_session *session = i->i_private;
mutex_lock(&session->stat_mutex);
reset_stat_session(session);
return 0;
}
-static int init_stat_file(struct tracer_stat_session *session)
+static int init_stat_file(struct stat_session *session)
{
if (!stat_dir && tracing_stat_init())
return -ENODEV;
int register_stat_tracer(struct tracer_stat *trace)
{
- struct tracer_stat_session *session, *node, *tmp;
+ struct stat_session *session, *node;
int ret;
if (!trace)
/* Already registered? */
mutex_lock(&all_stat_sessions_mutex);
- list_for_each_entry_safe(node, tmp, &all_stat_sessions, session_list) {
+ list_for_each_entry(node, &all_stat_sessions, session_list) {
if (node->ts == trace) {
mutex_unlock(&all_stat_sessions_mutex);
return -EINVAL;
mutex_unlock(&all_stat_sessions_mutex);
/* Init the session */
- session = kmalloc(sizeof(struct tracer_stat_session), GFP_KERNEL);
+ session = kzalloc(sizeof(*session), GFP_KERNEL);
if (!session)
return -ENOMEM;
session->ts = trace;
INIT_LIST_HEAD(&session->session_list);
- INIT_LIST_HEAD(&session->stat_list);
mutex_init(&session->stat_mutex);
- session->file = NULL;
ret = init_stat_file(session);
if (ret) {
void unregister_stat_tracer(struct tracer_stat *trace)
{
- struct tracer_stat_session *node, *tmp;
+ struct stat_session *node, *tmp;
mutex_lock(&all_stat_sessions_mutex);
list_for_each_entry_safe(node, tmp, &all_stat_sessions, session_list) {
/* The name of your stat file */
const char *name;
/* Iteration over statistic entries */
- void *(*stat_start)(void);
+ void *(*stat_start)(struct tracer_stat *trace);
void *(*stat_next)(void *prev, int idx);
/* Compare two entries for stats sorting */
int (*stat_cmp)(void *p1, void *p2);
void init_tracer_sysprof_debugfs(struct dentry *d_tracer)
{
- struct dentry *entry;
- entry = debugfs_create_file("sysprof_sample_period", 0644,
+ trace_create_file("sysprof_sample_period", 0644,
d_tracer, NULL, &sysprof_sample_fops);
- if (entry)
- return;
- pr_warning("Could not create debugfs 'sysprof_sample_period' entry\n");
}
*/
-#include <trace/workqueue.h>
+#include <trace/events/workqueue.h>
#include <linux/list.h>
#include <linux/percpu.h>
#include "trace_stat.h"
/* A cpu workqueue thread */
struct cpu_workqueue_stats {
struct list_head list;
-/* Useful to know if we print the cpu headers */
- bool first_entry;
int cpu;
pid_t pid;
/* Can be inserted from interrupt or user context, need to be atomic */
struct work_struct *work)
{
int cpu = cpumask_first(&wq_thread->cpus_allowed);
- struct cpu_workqueue_stats *node, *next;
+ struct cpu_workqueue_stats *node;
unsigned long flags;
spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
- list_for_each_entry_safe(node, next, &workqueue_cpu_stat(cpu)->list,
- list) {
+ list_for_each_entry(node, &workqueue_cpu_stat(cpu)->list, list) {
if (node->pid == wq_thread->pid) {
atomic_inc(&node->inserted);
goto found;
struct work_struct *work)
{
int cpu = cpumask_first(&wq_thread->cpus_allowed);
- struct cpu_workqueue_stats *node, *next;
+ struct cpu_workqueue_stats *node;
unsigned long flags;
spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
- list_for_each_entry_safe(node, next, &workqueue_cpu_stat(cpu)->list,
- list) {
+ list_for_each_entry(node, &workqueue_cpu_stat(cpu)->list, list) {
if (node->pid == wq_thread->pid) {
node->executed++;
goto found;
cws->pid = wq_thread->pid;
spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
- if (list_empty(&workqueue_cpu_stat(cpu)->list))
- cws->first_entry = true;
list_add_tail(&cws->list, &workqueue_cpu_stat(cpu)->list);
spin_unlock_irqrestore(&workqueue_cpu_stat(cpu)->lock, flags);
}
return ret;
}
-static void *workqueue_stat_start(void)
+static void *workqueue_stat_start(struct tracer_stat *trace)
{
int cpu;
void *ret = NULL;
static int workqueue_stat_show(struct seq_file *s, void *p)
{
struct cpu_workqueue_stats *cws = p;
- unsigned long flags;
- int cpu = cws->cpu;
struct pid *pid;
struct task_struct *tsk;
- spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
- if (&cws->list == workqueue_cpu_stat(cpu)->list.next)
- seq_printf(s, "\n");
- spin_unlock_irqrestore(&workqueue_cpu_stat(cpu)->lock, flags);
-
pid = find_get_pid(cws->pid);
if (pid) {
tsk = get_pid_task(pid, PIDTYPE_PID);
if (!list_empty(&wait->task_list))
list_del_init(&wait->task_list);
else if (waitqueue_active(q))
- __wake_up_common(q, mode, 1, 0, key);
+ __wake_up_locked_key(q, mode, key);
spin_unlock_irqrestore(&q->lock, flags);
}
EXPORT_SYMBOL(abort_exclusive_wait);
#include <linux/kallsyms.h>
#include <linux/debug_locks.h>
#include <linux/lockdep.h>
-#include <trace/workqueue.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/workqueue.h>
/*
* The per-CPU workqueue (if single thread, we always use the first
return (void *) (atomic_long_read(&work->data) & WORK_STRUCT_WQ_DATA_MASK);
}
-DEFINE_TRACE(workqueue_insertion);
-
static void insert_work(struct cpu_workqueue_struct *cwq,
struct work_struct *work, struct list_head *head)
{
}
EXPORT_SYMBOL_GPL(queue_delayed_work_on);
-DEFINE_TRACE(workqueue_execution);
-
static void run_workqueue(struct cpu_workqueue_struct *cwq)
{
spin_lock_irq(&cwq->lock);
return cwq;
}
-DEFINE_TRACE(workqueue_creation);
-
static int create_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
{
struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
}
EXPORT_SYMBOL_GPL(__create_workqueue_key);
-DEFINE_TRACE(workqueue_destruction);
-
static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq)
{
/*
#include <linux/dma-debug.h>
#include <linux/spinlock.h>
#include <linux/debugfs.h>
+#include <linux/uaccess.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/sched.h>
+#include <linux/ctype.h>
#include <linux/list.h>
#include <linux/slab.h>
static u32 num_free_entries;
static u32 min_free_entries;
+static u32 nr_total_entries;
/* number of preallocated entries requested by kernel cmdline */
static u32 req_entries;
static struct dentry *show_num_errors_dent __read_mostly;
static struct dentry *num_free_entries_dent __read_mostly;
static struct dentry *min_free_entries_dent __read_mostly;
+static struct dentry *filter_dent __read_mostly;
+
+/* per-driver filter related state */
+
+#define NAME_MAX_LEN 64
+
+static char current_driver_name[NAME_MAX_LEN] __read_mostly;
+static struct device_driver *current_driver __read_mostly;
+
+static DEFINE_RWLOCK(driver_name_lock);
static const char *type2name[4] = { "single", "page",
"scather-gather", "coherent" };
static const char *dir2name[4] = { "DMA_BIDIRECTIONAL", "DMA_TO_DEVICE",
"DMA_FROM_DEVICE", "DMA_NONE" };
+/* little merge helper - remove it after the merge window */
+#ifndef BUS_NOTIFY_UNBOUND_DRIVER
+#define BUS_NOTIFY_UNBOUND_DRIVER 0x0005
+#endif
+
/*
* The access to some variables in this macro is racy. We can't use atomic_t
* here because all these variables are exported to debugfs. Some of them even
{
#ifdef CONFIG_STACKTRACE
if (entry) {
- printk(KERN_WARNING "Mapped at:\n");
+ pr_warning("Mapped at:\n");
print_stack_trace(&entry->stacktrace, 0);
}
#endif
}
+static bool driver_filter(struct device *dev)
+{
+ struct device_driver *drv;
+ unsigned long flags;
+ bool ret;
+
+ /* driver filter off */
+ if (likely(!current_driver_name[0]))
+ return true;
+
+ /* driver filter on and initialized */
+ if (current_driver && dev->driver == current_driver)
+ return true;
+
+ if (current_driver || !current_driver_name[0])
+ return false;
+
+ /* driver filter on but not yet initialized */
+ drv = get_driver(dev->driver);
+ if (!drv)
+ return false;
+
+ /* lock to protect against change of current_driver_name */
+ read_lock_irqsave(&driver_name_lock, flags);
+
+ ret = false;
+ if (drv->name &&
+ strncmp(current_driver_name, drv->name, NAME_MAX_LEN - 1) == 0) {
+ current_driver = drv;
+ ret = true;
+ }
+
+ read_unlock_irqrestore(&driver_name_lock, flags);
+ put_driver(drv);
+
+ return ret;
+}
+
#define err_printk(dev, entry, format, arg...) do { \
error_count += 1; \
- if (show_all_errors || show_num_errors > 0) { \
+ if (driver_filter(dev) && \
+ (show_all_errors || show_num_errors > 0)) { \
WARN(1, "%s %s: " format, \
dev_driver_string(dev), \
dev_name(dev) , ## arg); \
static struct dma_debug_entry *hash_bucket_find(struct hash_bucket *bucket,
struct dma_debug_entry *ref)
{
- struct dma_debug_entry *entry;
+ struct dma_debug_entry *entry, *ret = NULL;
+ int matches = 0, match_lvl, last_lvl = 0;
list_for_each_entry(entry, &bucket->list, list) {
- if ((entry->dev_addr == ref->dev_addr) &&
- (entry->dev == ref->dev))
+ if ((entry->dev_addr != ref->dev_addr) ||
+ (entry->dev != ref->dev))
+ continue;
+
+ /*
+ * Some drivers map the same physical address multiple
+ * times. Without a hardware IOMMU this results in the
+ * same device addresses being put into the dma-debug
+ * hash multiple times too. This can result in false
+ * positives being reported. Therfore we implement a
+ * best-fit algorithm here which returns the entry from
+ * the hash which fits best to the reference value
+ * instead of the first-fit.
+ */
+ matches += 1;
+ match_lvl = 0;
+ entry->size == ref->size ? ++match_lvl : match_lvl;
+ entry->type == ref->type ? ++match_lvl : match_lvl;
+ entry->direction == ref->direction ? ++match_lvl : match_lvl;
+
+ if (match_lvl == 3) {
+ /* perfect-fit - return the result */
return entry;
+ } else if (match_lvl > last_lvl) {
+ /*
+ * We found an entry that fits better then the
+ * previous one
+ */
+ last_lvl = match_lvl;
+ ret = entry;
+ }
}
- return NULL;
+ /*
+ * If we have multiple matches but no perfect-fit, just return
+ * NULL.
+ */
+ ret = (matches == 1) ? ret : NULL;
+
+ return ret;
}
/*
put_hash_bucket(bucket, &flags);
}
+static struct dma_debug_entry *__dma_entry_alloc(void)
+{
+ struct dma_debug_entry *entry;
+
+ entry = list_entry(free_entries.next, struct dma_debug_entry, list);
+ list_del(&entry->list);
+ memset(entry, 0, sizeof(*entry));
+
+ num_free_entries -= 1;
+ if (num_free_entries < min_free_entries)
+ min_free_entries = num_free_entries;
+
+ return entry;
+}
+
/* struct dma_entry allocator
*
* The next two functions implement the allocator for
spin_lock_irqsave(&free_entries_lock, flags);
if (list_empty(&free_entries)) {
- printk(KERN_ERR "DMA-API: debugging out of memory "
- "- disabling\n");
+ pr_err("DMA-API: debugging out of memory - disabling\n");
global_disable = true;
goto out;
}
- entry = list_entry(free_entries.next, struct dma_debug_entry, list);
- list_del(&entry->list);
- memset(entry, 0, sizeof(*entry));
+ entry = __dma_entry_alloc();
#ifdef CONFIG_STACKTRACE
entry->stacktrace.max_entries = DMA_DEBUG_STACKTRACE_ENTRIES;
entry->stacktrace.skip = 2;
save_stack_trace(&entry->stacktrace);
#endif
- num_free_entries -= 1;
- if (num_free_entries < min_free_entries)
- min_free_entries = num_free_entries;
out:
spin_unlock_irqrestore(&free_entries_lock, flags);
spin_unlock_irqrestore(&free_entries_lock, flags);
}
+int dma_debug_resize_entries(u32 num_entries)
+{
+ int i, delta, ret = 0;
+ unsigned long flags;
+ struct dma_debug_entry *entry;
+ LIST_HEAD(tmp);
+
+ spin_lock_irqsave(&free_entries_lock, flags);
+
+ if (nr_total_entries < num_entries) {
+ delta = num_entries - nr_total_entries;
+
+ spin_unlock_irqrestore(&free_entries_lock, flags);
+
+ for (i = 0; i < delta; i++) {
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ break;
+
+ list_add_tail(&entry->list, &tmp);
+ }
+
+ spin_lock_irqsave(&free_entries_lock, flags);
+
+ list_splice(&tmp, &free_entries);
+ nr_total_entries += i;
+ num_free_entries += i;
+ } else {
+ delta = nr_total_entries - num_entries;
+
+ for (i = 0; i < delta && !list_empty(&free_entries); i++) {
+ entry = __dma_entry_alloc();
+ kfree(entry);
+ }
+
+ nr_total_entries -= i;
+ }
+
+ if (nr_total_entries != num_entries)
+ ret = 1;
+
+ spin_unlock_irqrestore(&free_entries_lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(dma_debug_resize_entries);
+
/*
* DMA-API debugging init code
*
num_free_entries = num_entries;
min_free_entries = num_entries;
- printk(KERN_INFO "DMA-API: preallocated %d debug entries\n",
- num_entries);
+ pr_info("DMA-API: preallocated %d debug entries\n", num_entries);
return 0;
return -ENOMEM;
}
+static ssize_t filter_read(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ char buf[NAME_MAX_LEN + 1];
+ unsigned long flags;
+ int len;
+
+ if (!current_driver_name[0])
+ return 0;
+
+ /*
+ * We can't copy to userspace directly because current_driver_name can
+ * only be read under the driver_name_lock with irqs disabled. So
+ * create a temporary copy first.
+ */
+ read_lock_irqsave(&driver_name_lock, flags);
+ len = scnprintf(buf, NAME_MAX_LEN + 1, "%s\n", current_driver_name);
+ read_unlock_irqrestore(&driver_name_lock, flags);
+
+ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t filter_write(struct file *file, const char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ char buf[NAME_MAX_LEN];
+ unsigned long flags;
+ size_t len;
+ int i;
+
+ /*
+ * We can't copy from userspace directly. Access to
+ * current_driver_name is protected with a write_lock with irqs
+ * disabled. Since copy_from_user can fault and may sleep we
+ * need to copy to temporary buffer first
+ */
+ len = min(count, (size_t)(NAME_MAX_LEN - 1));
+ if (copy_from_user(buf, userbuf, len))
+ return -EFAULT;
+
+ buf[len] = 0;
+
+ write_lock_irqsave(&driver_name_lock, flags);
+
+ /*
+ * Now handle the string we got from userspace very carefully.
+ * The rules are:
+ * - only use the first token we got
+ * - token delimiter is everything looking like a space
+ * character (' ', '\n', '\t' ...)
+ *
+ */
+ if (!isalnum(buf[0])) {
+ /*
+ * If the first character userspace gave us is not
+ * alphanumerical then assume the filter should be
+ * switched off.
+ */
+ if (current_driver_name[0])
+ pr_info("DMA-API: switching off dma-debug driver filter\n");
+ current_driver_name[0] = 0;
+ current_driver = NULL;
+ goto out_unlock;
+ }
+
+ /*
+ * Now parse out the first token and use it as the name for the
+ * driver to filter for.
+ */
+ for (i = 0; i < NAME_MAX_LEN; ++i) {
+ current_driver_name[i] = buf[i];
+ if (isspace(buf[i]) || buf[i] == ' ' || buf[i] == 0)
+ break;
+ }
+ current_driver_name[i] = 0;
+ current_driver = NULL;
+
+ pr_info("DMA-API: enable driver filter for driver [%s]\n",
+ current_driver_name);
+
+out_unlock:
+ write_unlock_irqrestore(&driver_name_lock, flags);
+
+ return count;
+}
+
+const struct file_operations filter_fops = {
+ .read = filter_read,
+ .write = filter_write,
+};
+
static int dma_debug_fs_init(void)
{
dma_debug_dent = debugfs_create_dir("dma-api", NULL);
if (!dma_debug_dent) {
- printk(KERN_ERR "DMA-API: can not create debugfs directory\n");
+ pr_err("DMA-API: can not create debugfs directory\n");
return -ENOMEM;
}
if (!min_free_entries_dent)
goto out_err;
+ filter_dent = debugfs_create_file("driver_filter", 0644,
+ dma_debug_dent, NULL, &filter_fops);
+ if (!filter_dent)
+ goto out_err;
+
return 0;
out_err:
return -ENOMEM;
}
+static int device_dma_allocations(struct device *dev)
+{
+ struct dma_debug_entry *entry;
+ unsigned long flags;
+ int count = 0, i;
+
+ local_irq_save(flags);
+
+ for (i = 0; i < HASH_SIZE; ++i) {
+ spin_lock(&dma_entry_hash[i].lock);
+ list_for_each_entry(entry, &dma_entry_hash[i].list, list) {
+ if (entry->dev == dev)
+ count += 1;
+ }
+ spin_unlock(&dma_entry_hash[i].lock);
+ }
+
+ local_irq_restore(flags);
+
+ return count;
+}
+
+static int dma_debug_device_change(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+ int count;
+
+
+ switch (action) {
+ case BUS_NOTIFY_UNBOUND_DRIVER:
+ count = device_dma_allocations(dev);
+ if (count == 0)
+ break;
+ err_printk(dev, NULL, "DMA-API: device driver has pending "
+ "DMA allocations while released from device "
+ "[count=%d]\n", count);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
void dma_debug_add_bus(struct bus_type *bus)
{
- /* FIXME: register notifier */
+ struct notifier_block *nb;
+
+ nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
+ if (nb == NULL) {
+ pr_err("dma_debug_add_bus: out of memory\n");
+ return;
+ }
+
+ nb->notifier_call = dma_debug_device_change;
+
+ bus_register_notifier(bus, nb);
}
/*
}
if (dma_debug_fs_init() != 0) {
- printk(KERN_ERR "DMA-API: error creating debugfs entries "
- "- disabling\n");
+ pr_err("DMA-API: error creating debugfs entries - disabling\n");
global_disable = true;
return;
num_entries = req_entries;
if (prealloc_memory(num_entries) != 0) {
- printk(KERN_ERR "DMA-API: debugging out of memory error "
- "- disabled\n");
+ pr_err("DMA-API: debugging out of memory error - disabled\n");
global_disable = true;
return;
}
- printk(KERN_INFO "DMA-API: debugging enabled by kernel config\n");
+ nr_total_entries = num_free_entries;
+
+ pr_info("DMA-API: debugging enabled by kernel config\n");
}
static __init int dma_debug_cmdline(char *str)
return -EINVAL;
if (strncmp(str, "off", 3) == 0) {
- printk(KERN_INFO "DMA-API: debugging disabled on kernel "
- "command line\n");
+ pr_info("DMA-API: debugging disabled on kernel command line\n");
global_disable = true;
}
entry->type = dma_debug_sg;
entry->dev = dev;
entry->paddr = sg_phys(s);
- entry->size = s->length;
- entry->dev_addr = s->dma_address;
+ entry->size = sg_dma_len(s);
+ entry->dev_addr = sg_dma_address(s);
entry->direction = direction;
entry->sg_call_ents = nents;
entry->sg_mapped_ents = mapped_ents;
if (!PageHighMem(sg_page(s))) {
check_for_stack(dev, sg_virt(s));
- check_for_illegal_area(dev, sg_virt(s), s->length);
+ check_for_illegal_area(dev, sg_virt(s), sg_dma_len(s));
}
add_dma_entry(entry);
}
EXPORT_SYMBOL(debug_dma_map_sg);
+static int get_nr_mapped_entries(struct device *dev, struct scatterlist *s)
+{
+ struct dma_debug_entry *entry, ref;
+ struct hash_bucket *bucket;
+ unsigned long flags;
+ int mapped_ents;
+
+ ref.dev = dev;
+ ref.dev_addr = sg_dma_address(s);
+ ref.size = sg_dma_len(s),
+
+ bucket = get_hash_bucket(&ref, &flags);
+ entry = hash_bucket_find(bucket, &ref);
+ mapped_ents = 0;
+
+ if (entry)
+ mapped_ents = entry->sg_mapped_ents;
+ put_hash_bucket(bucket, &flags);
+
+ return mapped_ents;
+}
+
void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, int dir)
{
- struct dma_debug_entry *entry;
struct scatterlist *s;
int mapped_ents = 0, i;
- unsigned long flags;
if (unlikely(global_disable))
return;
.type = dma_debug_sg,
.dev = dev,
.paddr = sg_phys(s),
- .dev_addr = s->dma_address,
- .size = s->length,
+ .dev_addr = sg_dma_address(s),
+ .size = sg_dma_len(s),
.direction = dir,
.sg_call_ents = 0,
};
if (mapped_ents && i >= mapped_ents)
break;
- if (mapped_ents == 0) {
- struct hash_bucket *bucket;
+ if (!i) {
ref.sg_call_ents = nelems;
- bucket = get_hash_bucket(&ref, &flags);
- entry = hash_bucket_find(bucket, &ref);
- if (entry)
- mapped_ents = entry->sg_mapped_ents;
- put_hash_bucket(bucket, &flags);
+ mapped_ents = get_nr_mapped_entries(dev, s);
}
check_unmap(&ref);
int nelems, int direction)
{
struct scatterlist *s;
- int i;
+ int mapped_ents = 0, i;
if (unlikely(global_disable))
return;
for_each_sg(sg, s, nelems, i) {
- check_sync(dev, s->dma_address, s->dma_length, 0,
- direction, true);
+ if (!i)
+ mapped_ents = get_nr_mapped_entries(dev, s);
+
+ if (i >= mapped_ents)
+ break;
+
+ check_sync(dev, sg_dma_address(s), sg_dma_len(s), 0,
+ direction, true);
}
}
EXPORT_SYMBOL(debug_dma_sync_sg_for_cpu);
int nelems, int direction)
{
struct scatterlist *s;
- int i;
+ int mapped_ents = 0, i;
if (unlikely(global_disable))
return;
for_each_sg(sg, s, nelems, i) {
- check_sync(dev, s->dma_address, s->dma_length, 0,
- direction, false);
+ if (!i)
+ mapped_ents = get_nr_mapped_entries(dev, s);
+
+ if (i >= mapped_ents)
+ break;
+
+ check_sync(dev, sg_dma_address(s), sg_dma_len(s), 0,
+ direction, false);
}
}
EXPORT_SYMBOL(debug_dma_sync_sg_for_device);
+static int __init dma_debug_driver_setup(char *str)
+{
+ int i;
+
+ for (i = 0; i < NAME_MAX_LEN - 1; ++i, ++str) {
+ current_driver_name[i] = *str;
+ if (*str == 0)
+ break;
+ }
+
+ if (current_driver_name[0])
+ pr_info("DMA-API: enable driver filter for driver [%s]\n",
+ current_driver_name);
+
+
+ return 1;
+}
+__setup("dma_debug_driver=", dma_debug_driver_setup);
int swiotlb_force;
/*
- * Used to do a quick range check in swiotlb_unmap_single and
- * swiotlb_sync_single_*, to see if the memory was in fact allocated by this
+ * Used to do a quick range check in unmap_single and
+ * sync_single_*, to see if the memory was in fact allocated by this
* API.
*/
static char *io_tlb_start, *io_tlb_end;
return paddr;
}
-phys_addr_t __weak swiotlb_bus_to_phys(dma_addr_t baddr)
+phys_addr_t __weak swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
{
return baddr;
}
return swiotlb_phys_to_bus(hwdev, virt_to_phys(address));
}
-static void *swiotlb_bus_to_virt(dma_addr_t address)
+void * __weak swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t address)
{
- return phys_to_virt(swiotlb_bus_to_phys(address));
+ return phys_to_virt(swiotlb_bus_to_phys(hwdev, address));
+}
+
+int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
+ dma_addr_t addr, size_t size)
+{
+ return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
}
int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
return -ENOMEM;
}
-static int
+static inline int
address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
{
- return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
+ return swiotlb_arch_address_needs_mapping(hwdev, addr, size);
}
static inline int range_needs_mapping(phys_addr_t paddr, size_t size)
unsigned long flags;
while (size) {
- sz = min(PAGE_SIZE - offset, size);
+ sz = min_t(size_t, PAGE_SIZE - offset, size);
local_irq_save(flags);
buffer = kmap_atomic(pfn_to_page(pfn),
* dma_addr is the kernel virtual address of the bounce buffer to unmap.
*/
static void
-unmap_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
+do_unmap_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
{
unsigned long flags;
int i, count, nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT;
size)) {
/*
* The allocated memory isn't reachable by the device.
- * Fall back on swiotlb_map_single().
*/
free_pages((unsigned long) ret, order);
ret = NULL;
if (!ret) {
/*
* We are either out of memory or the device can't DMA
- * to GFP_DMA memory; fall back on
- * swiotlb_map_single(), which will grab memory from
- * the lowest available address range.
+ * to GFP_DMA memory; fall back on map_single(), which
+ * will grab memory from the lowest available address range.
*/
ret = map_single(hwdev, 0, size, DMA_FROM_DEVICE);
if (!ret)
(unsigned long long)dev_addr);
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
- unmap_single(hwdev, ret, size, DMA_TO_DEVICE);
+ do_unmap_single(hwdev, ret, size, DMA_TO_DEVICE);
return NULL;
}
*dma_handle = dev_addr;
free_pages((unsigned long) vaddr, get_order(size));
else
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
- unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE);
+ do_unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE);
}
EXPORT_SYMBOL(swiotlb_free_coherent);
* physical address to use is returned.
*
* Once the device is given the dma address, the device owns this memory until
- * either swiotlb_unmap_single or swiotlb_dma_sync_single is performed.
+ * either swiotlb_unmap_page or swiotlb_dma_sync_single is performed.
*/
dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
struct dma_attrs *attrs)
{
phys_addr_t phys = page_to_phys(page) + offset;
- void *ptr = page_address(page) + offset;
dma_addr_t dev_addr = swiotlb_phys_to_bus(dev, phys);
void *map;
BUG_ON(dir == DMA_NONE);
/*
- * If the pointer passed in happens to be in the device's DMA window,
+ * If the address happens to be in the device's DMA window,
* we can safely return the device addr and not worry about bounce
* buffering it.
*/
if (!address_needs_mapping(dev, dev_addr, size) &&
- !range_needs_mapping(virt_to_phys(ptr), size))
+ !range_needs_mapping(phys, size))
return dev_addr;
/*
/*
* Unmap a single streaming mode DMA translation. The dma_addr and size must
- * match what was provided for in a previous swiotlb_map_single call. All
+ * match what was provided for in a previous swiotlb_map_page call. All
* other usages are undefined.
*
* After this call, reads by the cpu to the buffer are guaranteed to see
* whatever the device wrote there.
*/
+static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
+ size_t size, int dir)
+{
+ char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr);
+
+ BUG_ON(dir == DMA_NONE);
+
+ if (is_swiotlb_buffer(dma_addr)) {
+ do_unmap_single(hwdev, dma_addr, size, dir);
+ return;
+ }
+
+ if (dir != DMA_FROM_DEVICE)
+ return;
+
+ dma_mark_clean(dma_addr, size);
+}
+
void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
- char *dma_addr = swiotlb_bus_to_virt(dev_addr);
-
- BUG_ON(dir == DMA_NONE);
- if (is_swiotlb_buffer(dma_addr))
- unmap_single(hwdev, dma_addr, size, dir);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(dma_addr, size);
+ unmap_single(hwdev, dev_addr, size, dir);
}
EXPORT_SYMBOL_GPL(swiotlb_unmap_page);
* Make physical memory consistent for a single streaming mode DMA translation
* after a transfer.
*
- * If you perform a swiotlb_map_single() but wish to interrogate the buffer
+ * If you perform a swiotlb_map_page() but wish to interrogate the buffer
* using the cpu, yet do not wish to teardown the dma mapping, you must
* call this function before doing so. At the next point you give the dma
* address back to the card, you must first perform a
swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir, int target)
{
- char *dma_addr = swiotlb_bus_to_virt(dev_addr);
+ char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr);
BUG_ON(dir == DMA_NONE);
- if (is_swiotlb_buffer(dma_addr))
+
+ if (is_swiotlb_buffer(dma_addr)) {
sync_single(hwdev, dma_addr, size, dir, target);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(dma_addr, size);
+ return;
+ }
+
+ if (dir != DMA_FROM_DEVICE)
+ return;
+
+ dma_mark_clean(dma_addr, size);
}
void
unsigned long offset, size_t size,
int dir, int target)
{
- char *dma_addr = swiotlb_bus_to_virt(dev_addr) + offset;
-
- BUG_ON(dir == DMA_NONE);
- if (is_swiotlb_buffer(dma_addr))
- sync_single(hwdev, dma_addr, size, dir, target);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(dma_addr, size);
+ swiotlb_sync_single(hwdev, dev_addr + offset, size, dir, target);
}
void
/*
* Map a set of buffers described by scatterlist in streaming mode for DMA.
- * This is the scatter-gather version of the above swiotlb_map_single
+ * This is the scatter-gather version of the above swiotlb_map_page
* interface. Here the scatter gather list elements are each tagged with the
* appropriate dma address and length. They are obtained via
* sg_dma_{address,length}(SG).
* The routine returns the number of addr/length pairs actually
* used, at most nents.
*
- * Device ownership issues as mentioned above for swiotlb_map_single are the
+ * Device ownership issues as mentioned above for swiotlb_map_page are the
* same here.
*/
int
/*
* Unmap a set of streaming mode DMA translations. Again, cpu read rules
- * concerning calls here are the same as for swiotlb_unmap_single() above.
+ * concerning calls here are the same as for swiotlb_unmap_page() above.
*/
void
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
BUG_ON(dir == DMA_NONE);
- for_each_sg(sgl, sg, nelems, i) {
- if (sg->dma_address != swiotlb_phys_to_bus(hwdev, sg_phys(sg)))
- unmap_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
- sg->dma_length, dir);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length);
- }
+ for_each_sg(sgl, sg, nelems, i)
+ unmap_single(hwdev, sg->dma_address, sg->dma_length, dir);
+
}
EXPORT_SYMBOL(swiotlb_unmap_sg_attrs);
struct scatterlist *sg;
int i;
- BUG_ON(dir == DMA_NONE);
-
- for_each_sg(sgl, sg, nelems, i) {
- if (sg->dma_address != swiotlb_phys_to_bus(hwdev, sg_phys(sg)))
- sync_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
+ for_each_sg(sgl, sg, nelems, i)
+ swiotlb_sync_single(hwdev, sg->dma_address,
sg->dma_length, dir, target);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length);
- }
}
void
FORMAT_TYPE_LONG_LONG,
FORMAT_TYPE_ULONG,
FORMAT_TYPE_LONG,
+ FORMAT_TYPE_UBYTE,
+ FORMAT_TYPE_BYTE,
FORMAT_TYPE_USHORT,
FORMAT_TYPE_SHORT,
FORMAT_TYPE_UINT,
}
static char *symbol_string(char *buf, char *end, void *ptr,
- struct printf_spec spec)
+ struct printf_spec spec, char ext)
{
unsigned long value = (unsigned long) ptr;
#ifdef CONFIG_KALLSYMS
char sym[KSYM_SYMBOL_LEN];
- sprint_symbol(sym, value);
+ if (ext != 'f')
+ sprint_symbol(sym, value);
+ else
+ kallsyms_lookup(value, NULL, NULL, NULL, sym);
return string(buf, end, sym, spec);
#else
spec.field_width = 2*sizeof(void *);
*
* Right now we handle:
*
- * - 'F' For symbolic function descriptor pointers
+ * - 'F' For symbolic function descriptor pointers with offset
+ * - 'f' For simple symbolic function names without offset
* - 'S' For symbolic direct pointers
* - 'R' For a struct resource pointer, it prints the range of
* addresses (not the name nor the flags)
switch (*fmt) {
case 'F':
+ case 'f':
ptr = dereference_function_descriptor(ptr);
/* Fallthrough */
case 'S':
- return symbol_string(buf, end, ptr, spec);
+ return symbol_string(buf, end, ptr, spec, *fmt);
case 'R':
return resource_string(buf, end, ptr, spec);
case 'm':
spec->qualifier = -1;
if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
*fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
- spec->qualifier = *fmt;
- ++fmt;
- if (spec->qualifier == 'l' && *fmt == 'l') {
- spec->qualifier = 'L';
- ++fmt;
+ spec->qualifier = *fmt++;
+ if (unlikely(spec->qualifier == *fmt)) {
+ if (spec->qualifier == 'l') {
+ spec->qualifier = 'L';
+ ++fmt;
+ } else if (spec->qualifier == 'h') {
+ spec->qualifier = 'H';
+ ++fmt;
+ }
}
}
spec->type = FORMAT_TYPE_SIZE_T;
} else if (spec->qualifier == 't') {
spec->type = FORMAT_TYPE_PTRDIFF;
+ } else if (spec->qualifier == 'H') {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_BYTE;
+ else
+ spec->type = FORMAT_TYPE_UBYTE;
} else if (spec->qualifier == 'h') {
if (spec->flags & SIGN)
spec->type = FORMAT_TYPE_SHORT;
*
* This function follows C99 vsnprintf, but has some extensions:
* %pS output the name of a text symbol
- * %pF output the name of a function pointer
+ * %pF output the name of a function pointer with its offset
+ * %pf output the name of a function pointer without its offset
* %pR output the address range in a struct resource
*
* The return value is the number of characters which would
case FORMAT_TYPE_PTRDIFF:
num = va_arg(args, ptrdiff_t);
break;
+ case FORMAT_TYPE_UBYTE:
+ num = (unsigned char) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_BYTE:
+ num = (signed char) va_arg(args, int);
+ break;
case FORMAT_TYPE_USHORT:
num = (unsigned short) va_arg(args, int);
break;
case FORMAT_TYPE_PTRDIFF:
save_arg(ptrdiff_t);
break;
+ case FORMAT_TYPE_UBYTE:
+ case FORMAT_TYPE_BYTE:
+ save_arg(char);
+ break;
case FORMAT_TYPE_USHORT:
case FORMAT_TYPE_SHORT:
save_arg(short);
*
* The format follows C99 vsnprintf, but has some extensions:
* %pS output the name of a text symbol
- * %pF output the name of a function pointer
+ * %pF output the name of a function pointer with its offset
+ * %pf output the name of a function pointer without its offset
* %pR output the address range in a struct resource
* %n is ignored
*
case FORMAT_TYPE_PTRDIFF:
num = get_arg(ptrdiff_t);
break;
+ case FORMAT_TYPE_UBYTE:
+ num = get_arg(unsigned char);
+ break;
+ case FORMAT_TYPE_BYTE:
+ num = get_arg(signed char);
+ break;
case FORMAT_TYPE_USHORT:
num = get_arg(unsigned short);
break;
#include <linux/hash.h>
#include <linux/highmem.h>
#include <linux/blktrace_api.h>
-#include <trace/block.h>
#include <asm/tlbflush.h>
+#include <trace/events/block.h>
+
#define POOL_SIZE 64
#define ISA_POOL_SIZE 16
static mempool_t *page_pool, *isa_page_pool;
-DEFINE_TRACE(block_bio_bounce);
-
#ifdef CONFIG_HIGHMEM
static __init int init_emergency_pool(void)
{
free_uid(user);
}
-void *alloc_locked_buffer(size_t size)
+int account_locked_memory(struct mm_struct *mm, struct rlimit *rlim,
+ size_t size)
{
- unsigned long rlim, vm, pgsz;
- void *buffer = NULL;
+ unsigned long lim, vm, pgsz;
+ int error = -ENOMEM;
pgsz = PAGE_ALIGN(size) >> PAGE_SHIFT;
- down_write(¤t->mm->mmap_sem);
-
- rlim = current->signal->rlim[RLIMIT_AS].rlim_cur >> PAGE_SHIFT;
- vm = current->mm->total_vm + pgsz;
- if (rlim < vm)
- goto out;
+ down_write(&mm->mmap_sem);
- rlim = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >> PAGE_SHIFT;
- vm = current->mm->locked_vm + pgsz;
- if (rlim < vm)
+ lim = rlim[RLIMIT_AS].rlim_cur >> PAGE_SHIFT;
+ vm = mm->total_vm + pgsz;
+ if (lim < vm)
goto out;
- buffer = kzalloc(size, GFP_KERNEL);
- if (!buffer)
+ lim = rlim[RLIMIT_MEMLOCK].rlim_cur >> PAGE_SHIFT;
+ vm = mm->locked_vm + pgsz;
+ if (lim < vm)
goto out;
- current->mm->total_vm += pgsz;
- current->mm->locked_vm += pgsz;
+ mm->total_vm += pgsz;
+ mm->locked_vm += pgsz;
+ error = 0;
out:
- up_write(¤t->mm->mmap_sem);
- return buffer;
+ up_write(&mm->mmap_sem);
+ return error;
}
-void release_locked_buffer(void *buffer, size_t size)
+void refund_locked_memory(struct mm_struct *mm, size_t size)
{
unsigned long pgsz = PAGE_ALIGN(size) >> PAGE_SHIFT;
- down_write(¤t->mm->mmap_sem);
-
- current->mm->total_vm -= pgsz;
- current->mm->locked_vm -= pgsz;
-
- up_write(¤t->mm->mmap_sem);
-}
+ down_write(&mm->mmap_sem);
-void free_locked_buffer(void *buffer, size_t size)
-{
- release_locked_buffer(buffer, size);
+ mm->total_vm -= pgsz;
+ mm->locked_vm -= pgsz;
- kfree(buffer);
+ up_write(&mm->mmap_sem);
}
#include <linux/mempolicy.h>
#include <linux/rmap.h>
#include <linux/mmu_notifier.h>
+#include <linux/perf_counter.h>
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
if (correct_wcount)
atomic_inc(&inode->i_writecount);
out:
+ perf_counter_mmap(vma);
+
mm->total_vm += len >> PAGE_SHIFT;
vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT);
if (vm_flags & VM_LOCKED) {
mm->total_vm += len >> PAGE_SHIFT;
+ perf_counter_mmap(vma);
+
return 0;
}
#include <linux/swapops.h>
#include <linux/mmu_notifier.h>
#include <linux/migrate.h>
+#include <linux/perf_counter.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
error = mprotect_fixup(vma, &prev, nstart, tmp, newflags);
if (error)
goto out;
+ perf_counter_mmap(vma);
nstart = tmp;
if (nstart < prev->vm_end)
static int __meminitdata nr_nodemap_entries;
static unsigned long __meminitdata arch_zone_lowest_possible_pfn[MAX_NR_ZONES];
static unsigned long __meminitdata arch_zone_highest_possible_pfn[MAX_NR_ZONES];
-#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
- static unsigned long __meminitdata node_boundary_start_pfn[MAX_NUMNODES];
- static unsigned long __meminitdata node_boundary_end_pfn[MAX_NUMNODES];
-#endif /* CONFIG_MEMORY_HOTPLUG_RESERVE */
static unsigned long __initdata required_kernelcore;
static unsigned long __initdata required_movablecore;
static unsigned long __meminitdata zone_movable_pfn[MAX_NUMNODES];
early_node_map[i].end_pfn);
}
-/**
- * push_node_boundaries - Push node boundaries to at least the requested boundary
- * @nid: The nid of the node to push the boundary for
- * @start_pfn: The start pfn of the node
- * @end_pfn: The end pfn of the node
- *
- * In reserve-based hot-add, mem_map is allocated that is unused until hotadd
- * time. Specifically, on x86_64, SRAT will report ranges that can potentially
- * be hotplugged even though no physical memory exists. This function allows
- * an arch to push out the node boundaries so mem_map is allocated that can
- * be used later.
- */
-#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
-void __init push_node_boundaries(unsigned int nid,
- unsigned long start_pfn, unsigned long end_pfn)
-{
- mminit_dprintk(MMINIT_TRACE, "zoneboundary",
- "Entering push_node_boundaries(%u, %lu, %lu)\n",
- nid, start_pfn, end_pfn);
-
- /* Initialise the boundary for this node if necessary */
- if (node_boundary_end_pfn[nid] == 0)
- node_boundary_start_pfn[nid] = -1UL;
-
- /* Update the boundaries */
- if (node_boundary_start_pfn[nid] > start_pfn)
- node_boundary_start_pfn[nid] = start_pfn;
- if (node_boundary_end_pfn[nid] < end_pfn)
- node_boundary_end_pfn[nid] = end_pfn;
-}
-
-/* If necessary, push the node boundary out for reserve hotadd */
-static void __meminit account_node_boundary(unsigned int nid,
- unsigned long *start_pfn, unsigned long *end_pfn)
-{
- mminit_dprintk(MMINIT_TRACE, "zoneboundary",
- "Entering account_node_boundary(%u, %lu, %lu)\n",
- nid, *start_pfn, *end_pfn);
-
- /* Return if boundary information has not been provided */
- if (node_boundary_end_pfn[nid] == 0)
- return;
-
- /* Check the boundaries and update if necessary */
- if (node_boundary_start_pfn[nid] < *start_pfn)
- *start_pfn = node_boundary_start_pfn[nid];
- if (node_boundary_end_pfn[nid] > *end_pfn)
- *end_pfn = node_boundary_end_pfn[nid];
-}
-#else
-void __init push_node_boundaries(unsigned int nid,
- unsigned long start_pfn, unsigned long end_pfn) {}
-
-static void __meminit account_node_boundary(unsigned int nid,
- unsigned long *start_pfn, unsigned long *end_pfn) {}
-#endif
-
-
/**
* get_pfn_range_for_nid - Return the start and end page frames for a node
* @nid: The nid to return the range for. If MAX_NUMNODES, the min and max PFN are returned.
if (*start_pfn == -1UL)
*start_pfn = 0;
-
- /* Push the node boundaries out if requested */
- account_node_boundary(nid, start_pfn, end_pfn);
}
/*
{
memset(early_node_map, 0, sizeof(early_node_map));
nr_nodemap_entries = 0;
-#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
- memset(node_boundary_start_pfn, 0, sizeof(node_boundary_start_pfn));
- memset(node_boundary_end_pfn, 0, sizeof(node_boundary_end_pfn));
-#endif /* CONFIG_MEMORY_HOTPLUG_RESERVE */
}
/* Compare two active node_active_regions */
* Allocation is done in offset-size areas of single unit space. Ie,
* an area of 512 bytes at 6k in c1 occupies 512 bytes at 6k of c1:u0,
* c1:u1, c1:u2 and c1:u3. Percpu access can be done by configuring
- * percpu base registers UNIT_SIZE apart.
+ * percpu base registers pcpu_unit_size apart.
*
* There are usually many small percpu allocations many of them as
* small as 4 bytes. The allocator organizes chunks into lists
* region and negative allocated. Allocation inside a chunk is done
* by scanning this map sequentially and serving the first matching
* entry. This is mostly copied from the percpu_modalloc() allocator.
- * Chunks are also linked into a rb tree to ease address to chunk
- * mapping during free.
+ * Chunks can be determined from the address using the index field
+ * in the page struct. The index field contains a pointer to the chunk.
*
* To use this allocator, arch code should do the followings.
*
#include <linux/mutex.h>
#include <linux/percpu.h>
#include <linux/pfn.h>
-#include <linux/rbtree.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
struct pcpu_chunk {
struct list_head list; /* linked to pcpu_slot lists */
- struct rb_node rb_node; /* key is chunk->vm->addr */
int free_size; /* free bytes in the chunk */
int contig_hint; /* max contiguous size hint */
struct vm_struct *vm; /* mapped vmalloc region */
void *pcpu_base_addr __read_mostly;
EXPORT_SYMBOL_GPL(pcpu_base_addr);
-/* optional reserved chunk, only accessible for reserved allocations */
+/*
+ * The first chunk which always exists. Note that unlike other
+ * chunks, this one can be allocated and mapped in several different
+ * ways and thus often doesn't live in the vmalloc area.
+ */
+static struct pcpu_chunk *pcpu_first_chunk;
+
+/*
+ * Optional reserved chunk. This chunk reserves part of the first
+ * chunk and serves it for reserved allocations. The amount of
+ * reserved offset is in pcpu_reserved_chunk_limit. When reserved
+ * area doesn't exist, the following variables contain NULL and 0
+ * respectively.
+ */
static struct pcpu_chunk *pcpu_reserved_chunk;
-/* offset limit of the reserved chunk */
static int pcpu_reserved_chunk_limit;
/*
* There are two locks - pcpu_alloc_mutex and pcpu_lock. The former
* protects allocation/reclaim paths, chunks and chunk->page arrays.
* The latter is a spinlock and protects the index data structures -
- * chunk slots, rbtree, chunks and area maps in chunks.
+ * chunk slots, chunks and area maps in chunks.
*
* During allocation, pcpu_alloc_mutex is kept locked all the time and
* pcpu_lock is grabbed and released as necessary. All actual memory
static DEFINE_SPINLOCK(pcpu_lock); /* protects index data structures */
static struct list_head *pcpu_slot __read_mostly; /* chunk list slots */
-static struct rb_root pcpu_addr_root = RB_ROOT; /* chunks by address */
/* reclaim work to release fully free chunks, scheduled from free path */
static void pcpu_reclaim(struct work_struct *work);
return *pcpu_chunk_pagep(chunk, 0, page_idx) != NULL;
}
+/* set the pointer to a chunk in a page struct */
+static void pcpu_set_page_chunk(struct page *page, struct pcpu_chunk *pcpu)
+{
+ page->index = (unsigned long)pcpu;
+}
+
+/* obtain pointer to a chunk from a page struct */
+static struct pcpu_chunk *pcpu_get_page_chunk(struct page *page)
+{
+ return (struct pcpu_chunk *)page->index;
+}
+
/**
* pcpu_mem_alloc - allocate memory
* @size: bytes to allocate
}
}
-static struct rb_node **pcpu_chunk_rb_search(void *addr,
- struct rb_node **parentp)
-{
- struct rb_node **p = &pcpu_addr_root.rb_node;
- struct rb_node *parent = NULL;
- struct pcpu_chunk *chunk;
-
- while (*p) {
- parent = *p;
- chunk = rb_entry(parent, struct pcpu_chunk, rb_node);
-
- if (addr < chunk->vm->addr)
- p = &(*p)->rb_left;
- else if (addr > chunk->vm->addr)
- p = &(*p)->rb_right;
- else
- break;
- }
-
- if (parentp)
- *parentp = parent;
- return p;
-}
-
/**
- * pcpu_chunk_addr_search - search for chunk containing specified address
- * @addr: address to search for
- *
- * Look for chunk which might contain @addr. More specifically, it
- * searchs for the chunk with the highest start address which isn't
- * beyond @addr.
- *
- * CONTEXT:
- * pcpu_lock.
+ * pcpu_chunk_addr_search - determine chunk containing specified address
+ * @addr: address for which the chunk needs to be determined.
*
* RETURNS:
* The address of the found chunk.
*/
static struct pcpu_chunk *pcpu_chunk_addr_search(void *addr)
{
- struct rb_node *n, *parent;
- struct pcpu_chunk *chunk;
+ void *first_start = pcpu_first_chunk->vm->addr;
- /* is it in the reserved chunk? */
- if (pcpu_reserved_chunk) {
- void *start = pcpu_reserved_chunk->vm->addr;
-
- if (addr >= start && addr < start + pcpu_reserved_chunk_limit)
+ /* is it in the first chunk? */
+ if (addr >= first_start && addr < first_start + pcpu_chunk_size) {
+ /* is it in the reserved area? */
+ if (addr < first_start + pcpu_reserved_chunk_limit)
return pcpu_reserved_chunk;
+ return pcpu_first_chunk;
}
- /* nah... search the regular ones */
- n = *pcpu_chunk_rb_search(addr, &parent);
- if (!n) {
- /* no exactly matching chunk, the parent is the closest */
- n = parent;
- BUG_ON(!n);
- }
- chunk = rb_entry(n, struct pcpu_chunk, rb_node);
-
- if (addr < chunk->vm->addr) {
- /* the parent was the next one, look for the previous one */
- n = rb_prev(n);
- BUG_ON(!n);
- chunk = rb_entry(n, struct pcpu_chunk, rb_node);
- }
-
- return chunk;
-}
-
-/**
- * pcpu_chunk_addr_insert - insert chunk into address rb tree
- * @new: chunk to insert
- *
- * Insert @new into address rb tree.
- *
- * CONTEXT:
- * pcpu_lock.
- */
-static void pcpu_chunk_addr_insert(struct pcpu_chunk *new)
-{
- struct rb_node **p, *parent;
-
- p = pcpu_chunk_rb_search(new->vm->addr, &parent);
- BUG_ON(*p);
- rb_link_node(&new->rb_node, parent, p);
- rb_insert_color(&new->rb_node, &pcpu_addr_root);
+ return pcpu_get_page_chunk(vmalloc_to_page(addr));
}
/**
alloc_mask, 0);
if (!*pagep)
goto err;
+ pcpu_set_page_chunk(*pagep, chunk);
}
}
spin_lock_irq(&pcpu_lock);
pcpu_chunk_relocate(chunk, -1);
- pcpu_chunk_addr_insert(chunk);
goto restart;
area_found:
if (chunk == list_first_entry(head, struct pcpu_chunk, list))
continue;
- rb_erase(&chunk->rb_node, &pcpu_addr_root);
list_move(&chunk->list, &todo);
}
if (reserved_size) {
schunk->free_size = reserved_size;
- pcpu_reserved_chunk = schunk; /* not for dynamic alloc */
+ pcpu_reserved_chunk = schunk;
+ pcpu_reserved_chunk_limit = static_size + reserved_size;
} else {
schunk->free_size = dyn_size;
dyn_size = 0; /* dynamic area covered */
if (schunk->free_size)
schunk->map[schunk->map_used++] = schunk->free_size;
- pcpu_reserved_chunk_limit = static_size + schunk->free_size;
-
/* init dynamic chunk if necessary */
if (dyn_size) {
dchunk = alloc_bootmem(sizeof(struct pcpu_chunk));
}
/* link the first chunk in */
- if (!dchunk) {
- pcpu_chunk_relocate(schunk, -1);
- pcpu_chunk_addr_insert(schunk);
- } else {
- pcpu_chunk_relocate(dchunk, -1);
- pcpu_chunk_addr_insert(dchunk);
- }
+ pcpu_first_chunk = dchunk ?: schunk;
+ pcpu_chunk_relocate(pcpu_first_chunk, -1);
/* we're done */
pcpu_base_addr = (void *)pcpu_chunk_addr(schunk, 0, 0);
#include <linux/cpu.h>
#include <linux/sysctl.h>
#include <linux/module.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
#include <linux/rcupdate.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
#include <asm/atomic.h>
/*
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
#include <linux/cpu.h>
#include <linux/cpuset.h>
#include <linux/mempolicy.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/sched.h>
-#include <linux/tracepoint.h>
#include <asm/uaccess.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/kmem.h>
+
/**
* kstrdup - allocate space for and copy an existing string
* @s: the string to duplicate
EXPORT_SYMBOL_GPL(get_user_pages_fast);
/* Tracepoints definitions. */
-DEFINE_TRACE(kmalloc);
-DEFINE_TRACE(kmem_cache_alloc);
-DEFINE_TRACE(kmalloc_node);
-DEFINE_TRACE(kmem_cache_alloc_node);
-DEFINE_TRACE(kfree);
-DEFINE_TRACE(kmem_cache_free);
-
EXPORT_TRACEPOINT_SYMBOL(kmalloc);
EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc);
EXPORT_TRACEPOINT_SYMBOL(kmalloc_node);
#include <linux/bitops.h>
#include <net/genetlink.h>
-#include <trace/skb.h>
+#include <trace/events/skb.h>
#include <asm/unaligned.h>
#include <linux/workqueue.h>
#include <linux/netlink.h>
#include <linux/net_dropmon.h>
-#include <trace/skb.h>
#include <asm/unaligned.h>
#include <asm/bitops.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/skb.h>
-DEFINE_TRACE(kfree_skb);
EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb);
#include <asm/uaccess.h>
#include <asm/system.h>
-#include <trace/skb.h>
+#include <trace/events/skb.h>
#include "kmap_skb.h"
help
This build tracepoints example modules.
+config SAMPLE_TRACE_EVENTS
+ tristate "Build trace_events examples -- loadable modules only"
+ depends on EVENT_TRACING && m
+ help
+ This build trace event example modules.
+
config SAMPLE_KOBJECT
tristate "Build kobject examples"
help
# Makefile for Linux samples code
-obj-$(CONFIG_SAMPLES) += markers/ kobject/ kprobes/ tracepoints/
+obj-$(CONFIG_SAMPLES) += markers/ kobject/ kprobes/ tracepoints/ trace_events/
--- /dev/null
+# builds the trace events example kernel modules;
+# then to use one (as root): insmod <module_name.ko>
+
+CFLAGS_trace-events-sample.o := -I$(src)
+
+obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace-events-sample.o
--- /dev/null
+#include <linux/module.h>
+#include <linux/kthread.h>
+
+/*
+ * Any file that uses trace points, must include the header.
+ * But only one file, must include the header by defining
+ * CREATE_TRACE_POINTS first. This will make the C code that
+ * creates the handles for the trace points.
+ */
+#define CREATE_TRACE_POINTS
+#include "trace-events-sample.h"
+
+
+static void simple_thread_func(int cnt)
+{
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ);
+ trace_foo_bar("hello", cnt);
+}
+
+static int simple_thread(void *arg)
+{
+ int cnt = 0;
+
+ while (!kthread_should_stop())
+ simple_thread_func(cnt++);
+
+ return 0;
+}
+
+static struct task_struct *simple_tsk;
+
+static int __init trace_event_init(void)
+{
+ simple_tsk = kthread_run(simple_thread, NULL, "event-sample");
+ if (IS_ERR(simple_tsk))
+ return -1;
+
+ return 0;
+}
+
+static void __exit trace_event_exit(void)
+{
+ kthread_stop(simple_tsk);
+}
+
+module_init(trace_event_init);
+module_exit(trace_event_exit);
+
+MODULE_AUTHOR("Steven Rostedt");
+MODULE_DESCRIPTION("trace-events-sample");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Notice that this file is not protected like a normal header.
+ * We also must allow for rereading of this file. The
+ *
+ * || defined(TRACE_HEADER_MULTI_READ)
+ *
+ * serves this purpose.
+ */
+#if !defined(_TRACE_EVENT_SAMPLE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_EVENT_SAMPLE_H
+
+/*
+ * All trace headers should include tracepoint.h, until we finally
+ * make it into a standard header.
+ */
+#include <linux/tracepoint.h>
+
+/*
+ * If TRACE_SYSTEM is defined, that will be the directory created
+ * in the ftrace directory under /debugfs/tracing/events/<system>
+ *
+ * The define_trace.h belowe will also look for a file name of
+ * TRACE_SYSTEM.h where TRACE_SYSTEM is what is defined here.
+ *
+ * If you want a different system than file name, you can override
+ * the header name by defining TRACE_INCLUDE_FILE
+ *
+ * If this file was called, goofy.h, then we would define:
+ *
+ * #define TRACE_INCLUDE_FILE goofy
+ *
+ */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM sample
+
+/*
+ * The TRACE_EVENT macro is broken up into 5 parts.
+ *
+ * name: name of the trace point. This is also how to enable the tracepoint.
+ * A function called trace_foo_bar() will be created.
+ *
+ * proto: the prototype of the function trace_foo_bar()
+ * Here it is trace_foo_bar(char *foo, int bar).
+ *
+ * args: must match the arguments in the prototype.
+ * Here it is simply "foo, bar".
+ *
+ * struct: This defines the way the data will be stored in the ring buffer.
+ * There are currently two types of elements. __field and __array.
+ * a __field is broken up into (type, name). Where type can be any
+ * type but an array.
+ * For an array. there are three fields. (type, name, size). The
+ * type of elements in the array, the name of the field and the size
+ * of the array.
+ *
+ * __array( char, foo, 10) is the same as saying char foo[10].
+ *
+ * fast_assign: This is a C like function that is used to store the items
+ * into the ring buffer.
+ *
+ * printk: This is a way to print out the data in pretty print. This is
+ * useful if the system crashes and you are logging via a serial line,
+ * the data can be printed to the console using this "printk" method.
+ *
+ * Note, that for both the assign and the printk, __entry is the handler
+ * to the data structure in the ring buffer, and is defined by the
+ * TP_STRUCT__entry.
+ */
+TRACE_EVENT(foo_bar,
+
+ TP_PROTO(char *foo, int bar),
+
+ TP_ARGS(foo, bar),
+
+ TP_STRUCT__entry(
+ __array( char, foo, 10 )
+ __field( int, bar )
+ ),
+
+ TP_fast_assign(
+ strncpy(__entry->foo, foo, 10);
+ __entry->bar = bar;
+ ),
+
+ TP_printk("foo %s %d", __entry->foo, __entry->bar)
+);
+#endif
+
+/***** NOTICE! The #if protection ends here. *****/
+
+
+/*
+ * There are several ways I could have done this. If I left out the
+ * TRACE_INCLUDE_PATH, then it would default to the kernel source
+ * include/trace/events directory.
+ *
+ * I could specify a path from the define_trace.h file back to this
+ * file.
+ *
+ * #define TRACE_INCLUDE_PATH ../../samples/trace_events
+ *
+ * But I chose to simply make it use the current directory and then in
+ * the Makefile I added:
+ *
+ * CFLAGS_trace-events-sample.o := -I$(PWD)/samples/trace_events/
+ *
+ * This will make sure the current path is part of the include
+ * structure for our file so that we can find it.
+ *
+ * I could have made only the top level directory the include:
+ *
+ * CFLAGS_trace-events-sample.o := -I$(PWD)
+ *
+ * And then let the path to this directory be the TRACE_INCLUDE_PATH:
+ *
+ * #define TRACE_INCLUDE_PATH samples/trace_events
+ *
+ * But then if something defines "samples" or "trace_events" then we
+ * could risk that being converted too, and give us an unexpected
+ * result.
+ */
+#undef TRACE_INCLUDE_PATH
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_PATH .
+/*
+ * TRACE_INCLUDE_FILE is not needed if the filename and TRACE_SYSTEM are equal
+ */
+#define TRACE_INCLUDE_FILE trace-events-sample
+#include <trace/define_trace.h>
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
-cmd_gzip = gzip -f -9 < $< > $@
+cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -f -9 > $@) || \
+ (rm -f $@ ; false)
# Bzip2
# ---------------------------------------------------------------------------
-# Bzip2 does not include size in file... so we have to fake that
-size_append=$(CONFIG_SHELL) $(srctree)/scripts/bin_size
-
-quiet_cmd_bzip2 = BZIP2 $@
-cmd_bzip2 = (bzip2 -9 < $< && $(size_append) $<) > $@ || (rm -f $@ ; false)
+# Bzip2 and LZMA do not include size in file... so we have to fake that;
+# append the size as a 32-bit littleendian number as gzip does.
+size_append = echo -ne $(shell \
+dec_size=0; \
+for F in $1; do \
+ fsize=$$(stat -c "%s" $$F); \
+ dec_size=$$(expr $$dec_size + $$fsize); \
+done; \
+printf "%08x" $$dec_size | \
+ sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g' \
+)
+
+quiet_cmd_bzip2 = BZIP2 $@
+cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
+ bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
+ (rm -f $@ ; false)
# Lzma
# ---------------------------------------------------------------------------
quiet_cmd_lzma = LZMA $@
-cmd_lzma = (lzma -9 -c $< && $(size_append) $<) >$@ || (rm -f $@ ; false)
+cmd_lzma = (cat $(filter-out FORCE,$^) | \
+ lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
+ (rm -f $@ ; false)
+++ /dev/null
-#!/bin/sh
-
-if [ $# = 0 ] ; then
- echo Usage: $0 file
-fi
-
-size_dec=`stat -c "%s" $1`
-size_hex_echo_string=`printf "%08x" $size_dec |
- sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g'`
-/bin/echo -ne $size_hex_echo_string
$state = 0;
}
+sub tracepoint_munge($) {
+ my $file = shift;
+ my $tracepointname = 0;
+ my $tracepointargs = 0;
+
+ if($prototype =~ m/TRACE_EVENT\((.*?),/) {
+ $tracepointname = $1;
+ }
+ if($prototype =~ m/TP_PROTO\((.*?)\)/) {
+ $tracepointargs = $1;
+ }
+ if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
+ print STDERR "Warning(${file}:$.): Unrecognized tracepoint format: \n".
+ "$prototype\n";
+ } else {
+ $prototype = "static inline void trace_$tracepointname($tracepointargs)";
+ }
+}
+
sub syscall_munge() {
my $void = 0;
if ($prototype =~ /SYSCALL_DEFINE/) {
syscall_munge();
}
+ if ($prototype =~ /TRACE_EVENT/) {
+ tracepoint_munge($file);
+ }
dump_function($prototype, $file);
reset_state();
}
# which will also be the location of that section after final link.
# e.g.
#
-# .section ".text.sched"
+# .section ".sched.text", "ax"
# .globl my_func
# my_func:
# [...]
# [...]
#
# Both relocation offsets for the mcounts in the above example will be
-# offset from .text.sched. If we make another file called tmp.s with:
+# offset from .sched.text. If we make another file called tmp.s with:
#
# .section __mcount_loc
# .quad my_func + 0x5
# But this gets hard if my_func is not globl (a static function).
# In such a case we have:
#
-# .section ".text.sched"
+# .section ".sched.text", "ax"
# my_func:
# [...]
# call mcount (offset: 0x5)
* against concurrent list-extension
*/
rcu_read_lock();
- qe = list_entry(rcu_dereference(qe->later.next),
- struct ima_queue_entry, later);
+ qe = list_entry_rcu(qe->later.next,
+ struct ima_queue_entry, later);
rcu_read_unlock();
(*pos)++;
return;
}
- m = list_entry(rcu_dereference(smk_netlbladdr_list.next),
- struct smk_netlbladdr, list);
+ m = list_entry_rcu(smk_netlbladdr_list.next,
+ struct smk_netlbladdr, list);
/* the comparison '>' is a bit hacky, but works */
if (new->smk_mask.s_addr > m->smk_mask.s_addr) {
list_add_rcu(&new->list, &m->list);
return;
}
- m_next = list_entry(rcu_dereference(m->list.next),
- struct smk_netlbladdr, list);
+ m_next = list_entry_rcu(m->list.next,
+ struct smk_netlbladdr, list);
if (new->smk_mask.s_addr > m_next->smk_mask.s_addr) {
list_add_rcu(&new->list, &m->list);
return;
--- /dev/null
+PERF-BUILD-OPTIONS
+PERF-CFLAGS
+PERF-GUI-VARS
+PERF-VERSION-FILE
+perf
+perf-help
+perf-record
+perf-report
+perf-stat
+perf-top
+perf*.1
+perf*.xml
+common-cmds.h
+tags
+TAGS
+cscope*
--- /dev/null
+MAN1_TXT= \
+ $(filter-out $(addsuffix .txt, $(ARTICLES) $(SP_ARTICLES)), \
+ $(wildcard perf-*.txt)) \
+ perf.txt
+MAN5_TXT=
+MAN7_TXT=
+
+MAN_TXT = $(MAN1_TXT) $(MAN5_TXT) $(MAN7_TXT)
+MAN_XML=$(patsubst %.txt,%.xml,$(MAN_TXT))
+MAN_HTML=$(patsubst %.txt,%.html,$(MAN_TXT))
+
+DOC_HTML=$(MAN_HTML)
+
+ARTICLES =
+# with their own formatting rules.
+SP_ARTICLES =
+API_DOCS = $(patsubst %.txt,%,$(filter-out technical/api-index-skel.txt technical/api-index.txt, $(wildcard technical/api-*.txt)))
+SP_ARTICLES += $(API_DOCS)
+SP_ARTICLES += technical/api-index
+
+DOC_HTML += $(patsubst %,%.html,$(ARTICLES) $(SP_ARTICLES))
+
+DOC_MAN1=$(patsubst %.txt,%.1,$(MAN1_TXT))
+DOC_MAN5=$(patsubst %.txt,%.5,$(MAN5_TXT))
+DOC_MAN7=$(patsubst %.txt,%.7,$(MAN7_TXT))
+
+prefix?=$(HOME)
+bindir?=$(prefix)/bin
+htmldir?=$(prefix)/share/doc/perf-doc
+pdfdir?=$(prefix)/share/doc/perf-doc
+mandir?=$(prefix)/share/man
+man1dir=$(mandir)/man1
+man5dir=$(mandir)/man5
+man7dir=$(mandir)/man7
+# DESTDIR=
+
+ASCIIDOC=asciidoc
+ASCIIDOC_EXTRA =
+MANPAGE_XSL = manpage-normal.xsl
+XMLTO_EXTRA =
+INSTALL?=install
+RM ?= rm -f
+DOC_REF = origin/man
+HTML_REF = origin/html
+
+infodir?=$(prefix)/share/info
+MAKEINFO=makeinfo
+INSTALL_INFO=install-info
+DOCBOOK2X_TEXI=docbook2x-texi
+DBLATEX=dblatex
+ifndef PERL_PATH
+ PERL_PATH = /usr/bin/perl
+endif
+
+-include ../config.mak.autogen
+-include ../config.mak
+
+#
+# For asciidoc ...
+# -7.1.2, no extra settings are needed.
+# 8.0-, set ASCIIDOC8.
+#
+
+#
+# For docbook-xsl ...
+# -1.68.1, set ASCIIDOC_NO_ROFF? (based on changelog from 1.73.0)
+# 1.69.0, no extra settings are needed?
+# 1.69.1-1.71.0, set DOCBOOK_SUPPRESS_SP?
+# 1.71.1, no extra settings are needed?
+# 1.72.0, set DOCBOOK_XSL_172.
+# 1.73.0-, set ASCIIDOC_NO_ROFF
+#
+
+#
+# If you had been using DOCBOOK_XSL_172 in an attempt to get rid
+# of 'the ".ft C" problem' in your generated manpages, and you
+# instead ended up with weird characters around callouts, try
+# using ASCIIDOC_NO_ROFF instead (it works fine with ASCIIDOC8).
+#
+
+ifdef ASCIIDOC8
+ASCIIDOC_EXTRA += -a asciidoc7compatible
+endif
+ifdef DOCBOOK_XSL_172
+ASCIIDOC_EXTRA += -a perf-asciidoc-no-roff
+MANPAGE_XSL = manpage-1.72.xsl
+else
+ ifdef ASCIIDOC_NO_ROFF
+ # docbook-xsl after 1.72 needs the regular XSL, but will not
+ # pass-thru raw roff codes from asciidoc.conf, so turn them off.
+ ASCIIDOC_EXTRA += -a perf-asciidoc-no-roff
+ endif
+endif
+ifdef MAN_BOLD_LITERAL
+XMLTO_EXTRA += -m manpage-bold-literal.xsl
+endif
+ifdef DOCBOOK_SUPPRESS_SP
+XMLTO_EXTRA += -m manpage-suppress-sp.xsl
+endif
+
+SHELL_PATH ?= $(SHELL)
+# Shell quote;
+SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+
+#
+# Please note that there is a minor bug in asciidoc.
+# The version after 6.0.3 _will_ include the patch found here:
+# http://marc.theaimsgroup.com/?l=perf&m=111558757202243&w=2
+#
+# Until that version is released you may have to apply the patch
+# yourself - yes, all 6 characters of it!
+#
+
+QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
+QUIET_SUBDIR1 =
+
+ifneq ($(findstring $(MAKEFLAGS),w),w)
+PRINT_DIR = --no-print-directory
+else # "make -w"
+NO_SUBDIR = :
+endif
+
+ifneq ($(findstring $(MAKEFLAGS),s),s)
+ifndef V
+ QUIET_ASCIIDOC = @echo ' ' ASCIIDOC $@;
+ QUIET_XMLTO = @echo ' ' XMLTO $@;
+ QUIET_DB2TEXI = @echo ' ' DB2TEXI $@;
+ QUIET_MAKEINFO = @echo ' ' MAKEINFO $@;
+ QUIET_DBLATEX = @echo ' ' DBLATEX $@;
+ QUIET_XSLTPROC = @echo ' ' XSLTPROC $@;
+ QUIET_GEN = @echo ' ' GEN $@;
+ QUIET_STDERR = 2> /dev/null
+ QUIET_SUBDIR0 = +@subdir=
+ QUIET_SUBDIR1 = ;$(NO_SUBDIR) echo ' ' SUBDIR $$subdir; \
+ $(MAKE) $(PRINT_DIR) -C $$subdir
+ export V
+endif
+endif
+
+all: html man
+
+html: $(DOC_HTML)
+
+$(DOC_HTML) $(DOC_MAN1) $(DOC_MAN5) $(DOC_MAN7): asciidoc.conf
+
+man: man1 man5 man7
+man1: $(DOC_MAN1)
+man5: $(DOC_MAN5)
+man7: $(DOC_MAN7)
+
+info: perf.info perfman.info
+
+pdf: user-manual.pdf
+
+install: install-man
+
+install-man: man
+ $(INSTALL) -d -m 755 $(DESTDIR)$(man1dir)
+# $(INSTALL) -d -m 755 $(DESTDIR)$(man5dir)
+# $(INSTALL) -d -m 755 $(DESTDIR)$(man7dir)
+ $(INSTALL) -m 644 $(DOC_MAN1) $(DESTDIR)$(man1dir)
+# $(INSTALL) -m 644 $(DOC_MAN5) $(DESTDIR)$(man5dir)
+# $(INSTALL) -m 644 $(DOC_MAN7) $(DESTDIR)$(man7dir)
+
+install-info: info
+ $(INSTALL) -d -m 755 $(DESTDIR)$(infodir)
+ $(INSTALL) -m 644 perf.info perfman.info $(DESTDIR)$(infodir)
+ if test -r $(DESTDIR)$(infodir)/dir; then \
+ $(INSTALL_INFO) --info-dir=$(DESTDIR)$(infodir) perf.info ;\
+ $(INSTALL_INFO) --info-dir=$(DESTDIR)$(infodir) perfman.info ;\
+ else \
+ echo "No directory found in $(DESTDIR)$(infodir)" >&2 ; \
+ fi
+
+install-pdf: pdf
+ $(INSTALL) -d -m 755 $(DESTDIR)$(pdfdir)
+ $(INSTALL) -m 644 user-manual.pdf $(DESTDIR)$(pdfdir)
+
+install-html: html
+ '$(SHELL_PATH_SQ)' ./install-webdoc.sh $(DESTDIR)$(htmldir)
+
+../PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
+ $(QUIET_SUBDIR0)../ $(QUIET_SUBDIR1) PERF-VERSION-FILE
+
+-include ../PERF-VERSION-FILE
+
+#
+# Determine "include::" file references in asciidoc files.
+#
+doc.dep : $(wildcard *.txt) build-docdep.perl
+ $(QUIET_GEN)$(RM) $@+ $@ && \
+ $(PERL_PATH) ./build-docdep.perl >$@+ $(QUIET_STDERR) && \
+ mv $@+ $@
+
+-include doc.dep
+
+cmds_txt = cmds-ancillaryinterrogators.txt \
+ cmds-ancillarymanipulators.txt \
+ cmds-mainporcelain.txt \
+ cmds-plumbinginterrogators.txt \
+ cmds-plumbingmanipulators.txt \
+ cmds-synchingrepositories.txt \
+ cmds-synchelpers.txt \
+ cmds-purehelpers.txt \
+ cmds-foreignscminterface.txt
+
+$(cmds_txt): cmd-list.made
+
+cmd-list.made: cmd-list.perl ../command-list.txt $(MAN1_TXT)
+ $(QUIET_GEN)$(RM) $@ && \
+ $(PERL_PATH) ./cmd-list.perl ../command-list.txt $(QUIET_STDERR) && \
+ date >$@
+
+clean:
+ $(RM) *.xml *.xml+ *.html *.html+ *.1 *.5 *.7
+ $(RM) *.texi *.texi+ *.texi++ perf.info perfman.info
+ $(RM) howto-index.txt howto/*.html doc.dep
+ $(RM) technical/api-*.html technical/api-index.txt
+ $(RM) $(cmds_txt) *.made
+
+$(MAN_HTML): %.html : %.txt
+ $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
+ $(ASCIIDOC) -b xhtml11 -d manpage -f asciidoc.conf \
+ $(ASCIIDOC_EXTRA) -aperf_version=$(PERF_VERSION) -o $@+ $< && \
+ mv $@+ $@
+
+%.1 %.5 %.7 : %.xml
+ $(QUIET_XMLTO)$(RM) $@ && \
+ xmlto -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $<
+
+%.xml : %.txt
+ $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
+ $(ASCIIDOC) -b docbook -d manpage -f asciidoc.conf \
+ $(ASCIIDOC_EXTRA) -aperf_version=$(PERF_VERSION) -o $@+ $< && \
+ mv $@+ $@
+
+XSLT = docbook.xsl
+XSLTOPTS = --xinclude --stringparam html.stylesheet docbook-xsl.css
+
+user-manual.html: user-manual.xml
+ $(QUIET_XSLTPROC)xsltproc $(XSLTOPTS) -o $@ $(XSLT) $<
+
+perf.info: user-manual.texi
+ $(QUIET_MAKEINFO)$(MAKEINFO) --no-split -o $@ user-manual.texi
+
+user-manual.texi: user-manual.xml
+ $(QUIET_DB2TEXI)$(RM) $@+ $@ && \
+ $(DOCBOOK2X_TEXI) user-manual.xml --encoding=UTF-8 --to-stdout >$@++ && \
+ $(PERL_PATH) fix-texi.perl <$@++ >$@+ && \
+ rm $@++ && \
+ mv $@+ $@
+
+user-manual.pdf: user-manual.xml
+ $(QUIET_DBLATEX)$(RM) $@+ $@ && \
+ $(DBLATEX) -o $@+ -p /etc/asciidoc/dblatex/asciidoc-dblatex.xsl -s /etc/asciidoc/dblatex/asciidoc-dblatex.sty $< && \
+ mv $@+ $@
+
+perfman.texi: $(MAN_XML) cat-texi.perl
+ $(QUIET_DB2TEXI)$(RM) $@+ $@ && \
+ ($(foreach xml,$(MAN_XML),$(DOCBOOK2X_TEXI) --encoding=UTF-8 \
+ --to-stdout $(xml) &&) true) > $@++ && \
+ $(PERL_PATH) cat-texi.perl $@ <$@++ >$@+ && \
+ rm $@++ && \
+ mv $@+ $@
+
+perfman.info: perfman.texi
+ $(QUIET_MAKEINFO)$(MAKEINFO) --no-split --no-validate $*.texi
+
+$(patsubst %.txt,%.texi,$(MAN_TXT)): %.texi : %.xml
+ $(QUIET_DB2TEXI)$(RM) $@+ $@ && \
+ $(DOCBOOK2X_TEXI) --to-stdout $*.xml >$@+ && \
+ mv $@+ $@
+
+howto-index.txt: howto-index.sh $(wildcard howto/*.txt)
+ $(QUIET_GEN)$(RM) $@+ $@ && \
+ '$(SHELL_PATH_SQ)' ./howto-index.sh $(wildcard howto/*.txt) >$@+ && \
+ mv $@+ $@
+
+$(patsubst %,%.html,$(ARTICLES)) : %.html : %.txt
+ $(QUIET_ASCIIDOC)$(ASCIIDOC) -b xhtml11 $*.txt
+
+WEBDOC_DEST = /pub/software/tools/perf/docs
+
+$(patsubst %.txt,%.html,$(wildcard howto/*.txt)): %.html : %.txt
+ $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
+ sed -e '1,/^$$/d' $< | $(ASCIIDOC) -b xhtml11 - >$@+ && \
+ mv $@+ $@
+
+install-webdoc : html
+ '$(SHELL_PATH_SQ)' ./install-webdoc.sh $(WEBDOC_DEST)
+
+quick-install: quick-install-man
+
+quick-install-man:
+ '$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(DOC_REF) $(DESTDIR)$(mandir)
+
+quick-install-html:
+ '$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(HTML_REF) $(DESTDIR)$(htmldir)
+
+.PHONY: .FORCE-PERF-VERSION-FILE
--- /dev/null
+## linkperf: macro
+#
+# Usage: linkperf:command[manpage-section]
+#
+# Note, {0} is the manpage section, while {target} is the command.
+#
+# Show PERF link as: <command>(<section>); if section is defined, else just show
+# the command.
+
+[macros]
+(?su)[\\]?(?P<name>linkperf):(?P<target>\S*?)\[(?P<attrlist>.*?)\]=
+
+[attributes]
+asterisk=*
+plus=+
+caret=^
+startsb=[
+endsb=]
+tilde=~
+
+ifdef::backend-docbook[]
+[linkperf-inlinemacro]
+{0%{target}}
+{0#<citerefentry>}
+{0#<refentrytitle>{target}</refentrytitle><manvolnum>{0}</manvolnum>}
+{0#</citerefentry>}
+endif::backend-docbook[]
+
+ifdef::backend-docbook[]
+ifndef::perf-asciidoc-no-roff[]
+# "unbreak" docbook-xsl v1.68 for manpages. v1.69 works with or without this.
+# v1.72 breaks with this because it replaces dots not in roff requests.
+[listingblock]
+<example><title>{title}</title>
+<literallayout>
+ifdef::doctype-manpage[]
+ .ft C
+endif::doctype-manpage[]
+|
+ifdef::doctype-manpage[]
+ .ft
+endif::doctype-manpage[]
+</literallayout>
+{title#}</example>
+endif::perf-asciidoc-no-roff[]
+
+ifdef::perf-asciidoc-no-roff[]
+ifdef::doctype-manpage[]
+# The following two small workarounds insert a simple paragraph after screen
+[listingblock]
+<example><title>{title}</title>
+<literallayout>
+|
+</literallayout><simpara></simpara>
+{title#}</example>
+
+[verseblock]
+<formalpara{id? id="{id}"}><title>{title}</title><para>
+{title%}<literallayout{id? id="{id}"}>
+{title#}<literallayout>
+|
+</literallayout>
+{title#}</para></formalpara>
+{title%}<simpara></simpara>
+endif::doctype-manpage[]
+endif::perf-asciidoc-no-roff[]
+endif::backend-docbook[]
+
+ifdef::doctype-manpage[]
+ifdef::backend-docbook[]
+[header]
+template::[header-declarations]
+<refentry>
+<refmeta>
+<refentrytitle>{mantitle}</refentrytitle>
+<manvolnum>{manvolnum}</manvolnum>
+<refmiscinfo class="source">perf</refmiscinfo>
+<refmiscinfo class="version">{perf_version}</refmiscinfo>
+<refmiscinfo class="manual">perf Manual</refmiscinfo>
+</refmeta>
+<refnamediv>
+ <refname>{manname}</refname>
+ <refpurpose>{manpurpose}</refpurpose>
+</refnamediv>
+endif::backend-docbook[]
+endif::doctype-manpage[]
+
+ifdef::backend-xhtml11[]
+[linkperf-inlinemacro]
+<a href="{target}.html">{target}{0?({0})}</a>
+endif::backend-xhtml11[]
--- /dev/null
+<!-- manpage-1.72.xsl:
+ special settings for manpages rendered from asciidoc+docbook
+ handles peculiarities in docbook-xsl 1.72.0 -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<xsl:import href="manpage-base.xsl"/>
+
+<!-- these are the special values for the roff control characters
+ needed for docbook-xsl 1.72.0 -->
+<xsl:param name="git.docbook.backslash">▓</xsl:param>
+<xsl:param name="git.docbook.dot" >⌂</xsl:param>
+
+</xsl:stylesheet>
--- /dev/null
+<!-- manpage-base.xsl:
+ special formatting for manpages rendered from asciidoc+docbook -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<!-- these params silence some output from xmlto -->
+<xsl:param name="man.output.quietly" select="1"/>
+<xsl:param name="refentry.meta.get.quietly" select="1"/>
+
+<!-- convert asciidoc callouts to man page format;
+ git.docbook.backslash and git.docbook.dot params
+ must be supplied by another XSL file or other means -->
+<xsl:template match="co">
+ <xsl:value-of select="concat(
+ $git.docbook.backslash,'fB(',
+ substring-after(@id,'-'),')',
+ $git.docbook.backslash,'fR')"/>
+</xsl:template>
+<xsl:template match="calloutlist">
+ <xsl:value-of select="$git.docbook.dot"/>
+ <xsl:text>sp </xsl:text>
+ <xsl:apply-templates/>
+ <xsl:text> </xsl:text>
+</xsl:template>
+<xsl:template match="callout">
+ <xsl:value-of select="concat(
+ $git.docbook.backslash,'fB',
+ substring-after(@arearefs,'-'),
+ '. ',$git.docbook.backslash,'fR')"/>
+ <xsl:apply-templates/>
+ <xsl:value-of select="$git.docbook.dot"/>
+ <xsl:text>br </xsl:text>
+</xsl:template>
+
+</xsl:stylesheet>
--- /dev/null
+<!-- manpage-bold-literal.xsl:
+ special formatting for manpages rendered from asciidoc+docbook -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<!-- render literal text as bold (instead of plain or monospace);
+ this makes literal text easier to distinguish in manpages
+ viewed on a tty -->
+<xsl:template match="literal">
+ <xsl:value-of select="$git.docbook.backslash"/>
+ <xsl:text>fB</xsl:text>
+ <xsl:apply-templates/>
+ <xsl:value-of select="$git.docbook.backslash"/>
+ <xsl:text>fR</xsl:text>
+</xsl:template>
+
+</xsl:stylesheet>
--- /dev/null
+<!-- manpage-normal.xsl:
+ special settings for manpages rendered from asciidoc+docbook
+ handles anything we want to keep away from docbook-xsl 1.72.0 -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<xsl:import href="manpage-base.xsl"/>
+
+<!-- these are the normal values for the roff control characters -->
+<xsl:param name="git.docbook.backslash">\</xsl:param>
+<xsl:param name="git.docbook.dot" >.</xsl:param>
+
+</xsl:stylesheet>
--- /dev/null
+<!-- manpage-suppress-sp.xsl:
+ special settings for manpages rendered from asciidoc+docbook
+ handles erroneous, inline .sp in manpage output of some
+ versions of docbook-xsl -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<!-- attempt to work around spurious .sp at the tail of the line
+ that some versions of docbook stylesheets seem to add -->
+<xsl:template match="simpara">
+ <xsl:variable name="content">
+ <xsl:apply-templates/>
+ </xsl:variable>
+ <xsl:value-of select="normalize-space($content)"/>
+ <xsl:if test="not(ancestor::authorblurb) and
+ not(ancestor::personblurb)">
+ <xsl:text> </xsl:text>
+ </xsl:if>
+</xsl:template>
+
+</xsl:stylesheet>
--- /dev/null
+perf-annotate(1)
+==============
+
+NAME
+----
+perf-annotate - Read perf.data (created by perf record) and display annotated code
+
+SYNOPSIS
+--------
+[verse]
+'perf annotate' [-i <file> | --input=file] symbol_name
+
+DESCRIPTION
+-----------
+This command reads the input file and displays an annotated version of the
+code. If the object file has debug symbols then the source code will be
+displayed alongside assembly code.
+
+If there is no debug info in the object, then annotated assembly is displayed.
+
+OPTIONS
+-------
+-i::
+--input=::
+ Input file name. (default: perf.data)
+
+SEE ALSO
+--------
+linkperf:perf-record[1]
--- /dev/null
+perf-help(1)
+============
+
+NAME
+----
+perf-help - display help information about perf
+
+SYNOPSIS
+--------
+'perf help' [-a|--all] [COMMAND]
+
+DESCRIPTION
+-----------
+
+With no options and no COMMAND given, the synopsis of the 'perf'
+command and a list of the most commonly used perf commands are printed
+on the standard output.
+
+If the option '--all' or '-a' is given, then all available commands are
+printed on the standard output.
+
+If a perf command is named, a manual page for that command is brought
+up. The 'man' program is used by default for this purpose, but this
+can be overridden by other options or configuration variables.
+
+Note that `perf --help ...` is identical to `perf help ...` because the
+former is internally converted into the latter.
+
+OPTIONS
+-------
+-a::
+--all::
+ Prints all the available commands on the standard output. This
+ option supersedes any other option.
+
+PERF
+----
+Part of the linkperf:perf[1] suite
--- /dev/null
+perf-list(1)
+============
+
+NAME
+----
+perf-list - List all symbolic event types
+
+SYNOPSIS
+--------
+[verse]
+'perf list'
+
+DESCRIPTION
+-----------
+This command displays the symbolic event types which can be selected in the
+various perf commands with the -e option.
+
+OPTIONS
+-------
+None
+
+SEE ALSO
+--------
+linkperf:perf-stat[1], linkperf:perf-top[1],
+linkperf:perf-record[1]
--- /dev/null
+perf-record(1)
+==============
+
+NAME
+----
+perf-record - Run a command and record its profile into perf.data
+
+SYNOPSIS
+--------
+[verse]
+'perf record' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
+'perf record' [-e <EVENT> | --event=EVENT] [-l] [-a] -- <command> [<options>]
+
+DESCRIPTION
+-----------
+This command runs a command and gathers a performance counter profile
+from it, into perf.data - without displaying anything.
+
+This file can then be inspected later on, using 'perf report'.
+
+
+OPTIONS
+-------
+<command>...::
+ Any command you can specify in a shell.
+
+-e::
+--event=::
+ Select the PMU event. Selection can be a symbolic event name
+ (use 'perf list' to list all events) or a raw PMU
+ event (eventsel+umask) in the form of rNNN where NNN is a
+ hexadecimal event descriptor.
+
+-a::
+ system-wide collection
+
+-l::
+ scale counter values
+
+SEE ALSO
+--------
+linkperf:perf-stat[1], linkperf:perf-list[1]
--- /dev/null
+perf-report(1)
+==============
+
+NAME
+----
+perf-report - Read perf.data (created by perf record) and display the profile
+
+SYNOPSIS
+--------
+[verse]
+'perf report' [-i <file> | --input=file]
+
+DESCRIPTION
+-----------
+This command displays the performance counter profile information recorded
+via perf report.
+
+OPTIONS
+-------
+-i::
+--input=::
+ Input file name. (default: perf.data)
+
+SEE ALSO
+--------
+linkperf:perf-stat[1]
--- /dev/null
+perf-stat(1)
+============
+
+NAME
+----
+perf-stat - Run a command and gather performance counter statistics
+
+SYNOPSIS
+--------
+[verse]
+'perf stat' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
+'perf stat' [-e <EVENT> | --event=EVENT] [-l] [-a] -- <command> [<options>]
+
+DESCRIPTION
+-----------
+This command runs a command and gathers performance counter statistics
+from it.
+
+
+OPTIONS
+-------
+<command>...::
+ Any command you can specify in a shell.
+
+
+-e::
+--event=::
+ Select the PMU event. Selection can be a symbolic event name
+ (use 'perf list' to list all events) or a raw PMU
+ event (eventsel+umask) in the form of rNNN where NNN is a
+ hexadecimal event descriptor.
+
+-i::
+--inherit::
+ child tasks inherit counters
+-p::
+--pid=<pid>::
+ stat events on existing pid
+
+-a::
+ system-wide collection
+
+-l::
+ scale counter values
+
+EXAMPLES
+--------
+
+$ perf stat -- make -j
+
+ Performance counter stats for 'make -j':
+
+ 8117.370256 task clock ticks # 11.281 CPU utilization factor
+ 678 context switches # 0.000 M/sec
+ 133 CPU migrations # 0.000 M/sec
+ 235724 pagefaults # 0.029 M/sec
+ 24821162526 CPU cycles # 3057.784 M/sec
+ 18687303457 instructions # 2302.138 M/sec
+ 172158895 cache references # 21.209 M/sec
+ 27075259 cache misses # 3.335 M/sec
+
+ Wall-clock time elapsed: 719.554352 msecs
+
+SEE ALSO
+--------
+linkperf:perf-top[1], linkperf:perf-list[1]
--- /dev/null
+perf-top(1)
+===========
+
+NAME
+----
+perf-top - Run a command and profile it
+
+SYNOPSIS
+--------
+[verse]
+'perf top' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
+
+DESCRIPTION
+-----------
+This command runs a command and gathers a performance counter profile
+from it.
+
+
+OPTIONS
+-------
+<command>...::
+ Any command you can specify in a shell.
+
+-e::
+--event=::
+ Select the PMU event. Selection can be a symbolic event name
+ (use 'perf list' to list all events) or a raw PMU
+ event (eventsel+umask) in the form of rNNN where NNN is a
+ hexadecimal event descriptor.
+
+-a::
+ system-wide collection
+
+-l::
+ scale counter values
+
+SEE ALSO
+--------
+linkperf:perf-stat[1], linkperf:perf-list[1]
--- /dev/null
+perf(1)
+=======
+
+NAME
+----
+perf - Performance analysis tools for Linux
+
+SYNOPSIS
+--------
+[verse]
+'perf' [--version] [--help] COMMAND [ARGS]
+
+DESCRIPTION
+-----------
+Performance counters for Linux are are a new kernel-based subsystem
+that provide a framework for all things performance analysis. It
+covers hardware level (CPU/PMU, Performance Monitoring Unit) features
+and software features (software counters, tracepoints) as well.
+
+SEE ALSO
+--------
+linkperf:perf-stat[1], linkperf:perf-top[1],
+linkperf:perf-record[1], linkperf:perf-report[1],
+linkperf:perf-list[1]
--- /dev/null
+# The default target of this Makefile is...
+all::
+
+# Define V=1 to have a more verbose compile.
+#
+# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
+# or vsnprintf() return -1 instead of number of characters which would
+# have been written to the final string if enough space had been available.
+#
+# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
+# when attempting to read from an fopen'ed directory.
+#
+# Define NO_OPENSSL environment variable if you do not have OpenSSL.
+# This also implies MOZILLA_SHA1.
+#
+# Define CURLDIR=/foo/bar if your curl header and library files are in
+# /foo/bar/include and /foo/bar/lib directories.
+#
+# Define EXPATDIR=/foo/bar if your expat header and library files are in
+# /foo/bar/include and /foo/bar/lib directories.
+#
+# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
+#
+# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
+# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
+#
+# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
+# do not support the 'size specifiers' introduced by C99, namely ll, hh,
+# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
+# some C compilers supported these specifiers prior to C99 as an extension.
+#
+# Define NO_STRCASESTR if you don't have strcasestr.
+#
+# Define NO_MEMMEM if you don't have memmem.
+#
+# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
+# If your compiler also does not support long long or does not have
+# strtoull, define NO_STRTOULL.
+#
+# Define NO_SETENV if you don't have setenv in the C library.
+#
+# Define NO_UNSETENV if you don't have unsetenv in the C library.
+#
+# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
+#
+# Define NO_SYS_SELECT_H if you don't have sys/select.h.
+#
+# Define NO_SYMLINK_HEAD if you never want .perf/HEAD to be a symbolic link.
+# Enable it on Windows. By default, symrefs are still used.
+#
+# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
+# tests. These tests take up a significant amount of the total test time
+# but are not needed unless you plan to talk to SVN repos.
+#
+# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
+# installed in /sw, but don't want PERF to link against any libraries
+# installed there. If defined you may specify your own (or Fink's)
+# include directories and library directories by defining CFLAGS
+# and LDFLAGS appropriately.
+#
+# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
+# have DarwinPorts installed in /opt/local, but don't want PERF to
+# link against any libraries installed there. If defined you may
+# specify your own (or DarwinPort's) include directories and
+# library directories by defining CFLAGS and LDFLAGS appropriately.
+#
+# Define PPC_SHA1 environment variable when running make to make use of
+# a bundled SHA1 routine optimized for PowerPC.
+#
+# Define ARM_SHA1 environment variable when running make to make use of
+# a bundled SHA1 routine optimized for ARM.
+#
+# Define MOZILLA_SHA1 environment variable when running make to make use of
+# a bundled SHA1 routine coming from Mozilla. It is GPL'd and should be fast
+# on non-x86 architectures (e.g. PowerPC), while the OpenSSL version (default
+# choice) has very fast version optimized for i586.
+#
+# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
+#
+# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin).
+#
+# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
+# Patrick Mauritz).
+#
+# Define NO_MMAP if you want to avoid mmap.
+#
+# Define NO_PTHREADS if you do not have or do not want to use Pthreads.
+#
+# Define NO_PREAD if you have a problem with pread() system call (e.g.
+# cygwin.dll before v1.5.22).
+#
+# Define NO_FAST_WORKING_DIRECTORY if accessing objects in pack files is
+# generally faster on your platform than accessing the working directory.
+#
+# Define NO_TRUSTABLE_FILEMODE if your filesystem may claim to support
+# the executable mode bit, but doesn't really do so.
+#
+# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
+#
+# Define NO_SOCKADDR_STORAGE if your platform does not have struct
+# sockaddr_storage.
+#
+# Define NO_ICONV if your libc does not properly support iconv.
+#
+# Define OLD_ICONV if your library has an old iconv(), where the second
+# (input buffer pointer) parameter is declared with type (const char **).
+#
+# Define NO_DEFLATE_BOUND if your zlib does not have deflateBound.
+#
+# Define NO_R_TO_GCC_LINKER if your gcc does not like "-R/path/lib"
+# that tells runtime paths to dynamic libraries;
+# "-Wl,-rpath=/path/lib" is used instead.
+#
+# Define USE_NSEC below if you want perf to care about sub-second file mtimes
+# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
+# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
+# randomly break unless your underlying filesystem supports those sub-second
+# times (my ext3 doesn't).
+#
+# Define USE_ST_TIMESPEC if your "struct stat" uses "st_ctimespec" instead of
+# "st_ctim"
+#
+# Define NO_NSEC if your "struct stat" does not have "st_ctim.tv_nsec"
+# available. This automatically turns USE_NSEC off.
+#
+# Define USE_STDEV below if you want perf to care about the underlying device
+# change being considered an inode change from the update-index perspective.
+#
+# Define NO_ST_BLOCKS_IN_STRUCT_STAT if your platform does not have st_blocks
+# field that counts the on-disk footprint in 512-byte blocks.
+#
+# Define ASCIIDOC8 if you want to format documentation with AsciiDoc 8
+#
+# Define DOCBOOK_XSL_172 if you want to format man pages with DocBook XSL v1.72.
+#
+# Define NO_PERL_MAKEMAKER if you cannot use Makefiles generated by perl's
+# MakeMaker (e.g. using ActiveState under Cygwin).
+#
+# Define NO_PERL if you do not want Perl scripts or libraries at all.
+#
+# Define INTERNAL_QSORT to use Git's implementation of qsort(), which
+# is a simplified version of the merge sort used in glibc. This is
+# recommended if Git triggers O(n^2) behavior in your platform's qsort().
+#
+# Define NO_EXTERNAL_GREP if you don't want "perf grep" to ever call
+# your external grep (e.g., if your system lacks grep, if its grep is
+# broken, or spawning external process is slower than built-in grep perf has).
+
+PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
+ @$(SHELL_PATH) util/PERF-VERSION-GEN
+-include PERF-VERSION-FILE
+
+uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
+uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not')
+uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not')
+uname_R := $(shell sh -c 'uname -r 2>/dev/null || echo not')
+uname_P := $(shell sh -c 'uname -p 2>/dev/null || echo not')
+uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
+
+# CFLAGS and LDFLAGS are for the users to override from the command line.
+
+CFLAGS = -ggdb3 -Wall -Werror -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement -O6
+LDFLAGS = -lpthread -lrt -lelf
+ALL_CFLAGS = $(CFLAGS)
+ALL_LDFLAGS = $(LDFLAGS)
+STRIP ?= strip
+
+# Among the variables below, these:
+# perfexecdir
+# template_dir
+# mandir
+# infodir
+# htmldir
+# ETC_PERFCONFIG (but not sysconfdir)
+# can be specified as a relative path some/where/else;
+# this is interpreted as relative to $(prefix) and "perf" at
+# runtime figures out where they are based on the path to the executable.
+# This can help installing the suite in a relocatable way.
+
+prefix = $(HOME)
+bindir_relative = bin
+bindir = $(prefix)/$(bindir_relative)
+mandir = share/man
+infodir = share/info
+perfexecdir = libexec/perf-core
+sharedir = $(prefix)/share
+template_dir = share/perf-core/templates
+htmldir = share/doc/perf-doc
+ifeq ($(prefix),/usr)
+sysconfdir = /etc
+ETC_PERFCONFIG = $(sysconfdir)/perfconfig
+else
+sysconfdir = $(prefix)/etc
+ETC_PERFCONFIG = etc/perfconfig
+endif
+lib = lib
+# DESTDIR=
+
+export prefix bindir sharedir sysconfdir
+
+CC = gcc
+AR = ar
+RM = rm -f
+TAR = tar
+FIND = find
+INSTALL = install
+RPMBUILD = rpmbuild
+PTHREAD_LIBS = -lpthread
+
+# sparse is architecture-neutral, which means that we need to tell it
+# explicitly what architecture to check for. Fix this up for yours..
+SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__powerpc__
+
+
+
+### --- END CONFIGURATION SECTION ---
+
+# Those must not be GNU-specific; they are shared with perl/ which may
+# be built by a different compiler. (Note that this is an artifact now
+# but it still might be nice to keep that distinction.)
+BASIC_CFLAGS =
+BASIC_LDFLAGS =
+
+# Guard against environment variables
+BUILTIN_OBJS =
+BUILT_INS =
+COMPAT_CFLAGS =
+COMPAT_OBJS =
+LIB_H =
+LIB_OBJS =
+SCRIPT_PERL =
+SCRIPT_SH =
+TEST_PROGRAMS =
+
+#
+# No scripts right now:
+#
+
+# SCRIPT_SH += perf-am.sh
+
+#
+# No Perl scripts right now:
+#
+
+# SCRIPT_PERL += perf-add--interactive.perl
+
+SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
+ $(patsubst %.perl,%,$(SCRIPT_PERL))
+
+# Empty...
+EXTRA_PROGRAMS =
+
+# ... and all the rest that could be moved out of bindir to perfexecdir
+PROGRAMS += $(EXTRA_PROGRAMS)
+
+#
+# Single 'perf' binary right now:
+#
+PROGRAMS += perf
+
+# List built-in command $C whose implementation cmd_$C() is not in
+# builtin-$C.o but is linked in as part of some other command.
+#
+# None right now:
+#
+# BUILT_INS += perf-init $X
+
+# what 'all' will build and 'install' will install, in perfexecdir
+ALL_PROGRAMS = $(PROGRAMS) $(SCRIPTS)
+
+# what 'all' will build but not install in perfexecdir
+OTHER_PROGRAMS = perf$X
+
+# Set paths to tools early so that they can be used for version tests.
+ifndef SHELL_PATH
+ SHELL_PATH = /bin/sh
+endif
+ifndef PERL_PATH
+ PERL_PATH = /usr/bin/perl
+endif
+
+export PERL_PATH
+
+LIB_FILE=libperf.a
+
+LIB_H += ../../include/linux/perf_counter.h
+LIB_H += perf.h
+LIB_H += util/list.h
+LIB_H += util/rbtree.h
+LIB_H += util/levenshtein.h
+LIB_H += util/parse-options.h
+LIB_H += util/parse-events.h
+LIB_H += util/quote.h
+LIB_H += util/util.h
+LIB_H += util/help.h
+LIB_H += util/strbuf.h
+LIB_H += util/string.h
+LIB_H += util/run-command.h
+LIB_H += util/sigchain.h
+LIB_H += util/symbol.h
+LIB_H += util/color.h
+
+LIB_OBJS += util/abspath.o
+LIB_OBJS += util/alias.o
+LIB_OBJS += util/config.o
+LIB_OBJS += util/ctype.o
+LIB_OBJS += util/environment.o
+LIB_OBJS += util/exec_cmd.o
+LIB_OBJS += util/help.o
+LIB_OBJS += util/levenshtein.o
+LIB_OBJS += util/parse-options.o
+LIB_OBJS += util/parse-events.o
+LIB_OBJS += util/path.o
+LIB_OBJS += util/rbtree.o
+LIB_OBJS += util/run-command.o
+LIB_OBJS += util/quote.o
+LIB_OBJS += util/strbuf.o
+LIB_OBJS += util/string.o
+LIB_OBJS += util/usage.o
+LIB_OBJS += util/wrapper.o
+LIB_OBJS += util/sigchain.o
+LIB_OBJS += util/symbol.o
+LIB_OBJS += util/color.o
+LIB_OBJS += util/pager.o
+
+BUILTIN_OBJS += builtin-annotate.o
+BUILTIN_OBJS += builtin-help.o
+BUILTIN_OBJS += builtin-list.o
+BUILTIN_OBJS += builtin-record.o
+BUILTIN_OBJS += builtin-report.o
+BUILTIN_OBJS += builtin-stat.o
+BUILTIN_OBJS += builtin-top.o
+
+PERFLIBS = $(LIB_FILE)
+EXTLIBS =
+
+#
+# Platform specific tweaks
+#
+
+# We choose to avoid "if .. else if .. else .. endif endif"
+# because maintaining the nesting to match is a pain. If
+# we had "elif" things would have been much nicer...
+
+-include config.mak.autogen
+-include config.mak
+
+ifeq ($(uname_S),Darwin)
+ ifndef NO_FINK
+ ifeq ($(shell test -d /sw/lib && echo y),y)
+ BASIC_CFLAGS += -I/sw/include
+ BASIC_LDFLAGS += -L/sw/lib
+ endif
+ endif
+ ifndef NO_DARWIN_PORTS
+ ifeq ($(shell test -d /opt/local/lib && echo y),y)
+ BASIC_CFLAGS += -I/opt/local/include
+ BASIC_LDFLAGS += -L/opt/local/lib
+ endif
+ endif
+ PTHREAD_LIBS =
+endif
+
+ifndef CC_LD_DYNPATH
+ ifdef NO_R_TO_GCC_LINKER
+ # Some gcc does not accept and pass -R to the linker to specify
+ # the runtime dynamic library path.
+ CC_LD_DYNPATH = -Wl,-rpath,
+ else
+ CC_LD_DYNPATH = -R
+ endif
+endif
+
+ifdef ZLIB_PATH
+ BASIC_CFLAGS += -I$(ZLIB_PATH)/include
+ EXTLIBS += -L$(ZLIB_PATH)/$(lib) $(CC_LD_DYNPATH)$(ZLIB_PATH)/$(lib)
+endif
+EXTLIBS += -lz
+
+ifdef NEEDS_SOCKET
+ EXTLIBS += -lsocket
+endif
+ifdef NEEDS_NSL
+ EXTLIBS += -lnsl
+endif
+ifdef NO_D_TYPE_IN_DIRENT
+ BASIC_CFLAGS += -DNO_D_TYPE_IN_DIRENT
+endif
+ifdef NO_D_INO_IN_DIRENT
+ BASIC_CFLAGS += -DNO_D_INO_IN_DIRENT
+endif
+ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
+ BASIC_CFLAGS += -DNO_ST_BLOCKS_IN_STRUCT_STAT
+endif
+ifdef USE_NSEC
+ BASIC_CFLAGS += -DUSE_NSEC
+endif
+ifdef USE_ST_TIMESPEC
+ BASIC_CFLAGS += -DUSE_ST_TIMESPEC
+endif
+ifdef NO_NSEC
+ BASIC_CFLAGS += -DNO_NSEC
+endif
+ifdef NO_C99_FORMAT
+ BASIC_CFLAGS += -DNO_C99_FORMAT
+endif
+ifdef SNPRINTF_RETURNS_BOGUS
+ COMPAT_CFLAGS += -DSNPRINTF_RETURNS_BOGUS
+ COMPAT_OBJS += compat/snprintf.o
+endif
+ifdef FREAD_READS_DIRECTORIES
+ COMPAT_CFLAGS += -DFREAD_READS_DIRECTORIES
+ COMPAT_OBJS += compat/fopen.o
+endif
+ifdef NO_SYMLINK_HEAD
+ BASIC_CFLAGS += -DNO_SYMLINK_HEAD
+endif
+ifdef NO_STRCASESTR
+ COMPAT_CFLAGS += -DNO_STRCASESTR
+ COMPAT_OBJS += compat/strcasestr.o
+endif
+ifdef NO_STRTOUMAX
+ COMPAT_CFLAGS += -DNO_STRTOUMAX
+ COMPAT_OBJS += compat/strtoumax.o
+endif
+ifdef NO_STRTOULL
+ COMPAT_CFLAGS += -DNO_STRTOULL
+endif
+ifdef NO_SETENV
+ COMPAT_CFLAGS += -DNO_SETENV
+ COMPAT_OBJS += compat/setenv.o
+endif
+ifdef NO_MKDTEMP
+ COMPAT_CFLAGS += -DNO_MKDTEMP
+ COMPAT_OBJS += compat/mkdtemp.o
+endif
+ifdef NO_UNSETENV
+ COMPAT_CFLAGS += -DNO_UNSETENV
+ COMPAT_OBJS += compat/unsetenv.o
+endif
+ifdef NO_SYS_SELECT_H
+ BASIC_CFLAGS += -DNO_SYS_SELECT_H
+endif
+ifdef NO_MMAP
+ COMPAT_CFLAGS += -DNO_MMAP
+ COMPAT_OBJS += compat/mmap.o
+else
+ ifdef USE_WIN32_MMAP
+ COMPAT_CFLAGS += -DUSE_WIN32_MMAP
+ COMPAT_OBJS += compat/win32mmap.o
+ endif
+endif
+ifdef NO_PREAD
+ COMPAT_CFLAGS += -DNO_PREAD
+ COMPAT_OBJS += compat/pread.o
+endif
+ifdef NO_FAST_WORKING_DIRECTORY
+ BASIC_CFLAGS += -DNO_FAST_WORKING_DIRECTORY
+endif
+ifdef NO_TRUSTABLE_FILEMODE
+ BASIC_CFLAGS += -DNO_TRUSTABLE_FILEMODE
+endif
+ifdef NO_IPV6
+ BASIC_CFLAGS += -DNO_IPV6
+endif
+ifdef NO_UINTMAX_T
+ BASIC_CFLAGS += -Duintmax_t=uint32_t
+endif
+ifdef NO_SOCKADDR_STORAGE
+ifdef NO_IPV6
+ BASIC_CFLAGS += -Dsockaddr_storage=sockaddr_in
+else
+ BASIC_CFLAGS += -Dsockaddr_storage=sockaddr_in6
+endif
+endif
+ifdef NO_INET_NTOP
+ LIB_OBJS += compat/inet_ntop.o
+endif
+ifdef NO_INET_PTON
+ LIB_OBJS += compat/inet_pton.o
+endif
+
+ifdef NO_ICONV
+ BASIC_CFLAGS += -DNO_ICONV
+endif
+
+ifdef OLD_ICONV
+ BASIC_CFLAGS += -DOLD_ICONV
+endif
+
+ifdef NO_DEFLATE_BOUND
+ BASIC_CFLAGS += -DNO_DEFLATE_BOUND
+endif
+
+ifdef PPC_SHA1
+ SHA1_HEADER = "ppc/sha1.h"
+ LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
+else
+ifdef ARM_SHA1
+ SHA1_HEADER = "arm/sha1.h"
+ LIB_OBJS += arm/sha1.o arm/sha1_arm.o
+else
+ifdef MOZILLA_SHA1
+ SHA1_HEADER = "mozilla-sha1/sha1.h"
+ LIB_OBJS += mozilla-sha1/sha1.o
+else
+ SHA1_HEADER = <openssl/sha.h>
+ EXTLIBS += $(LIB_4_CRYPTO)
+endif
+endif
+endif
+ifdef NO_PERL_MAKEMAKER
+ export NO_PERL_MAKEMAKER
+endif
+ifdef NO_HSTRERROR
+ COMPAT_CFLAGS += -DNO_HSTRERROR
+ COMPAT_OBJS += compat/hstrerror.o
+endif
+ifdef NO_MEMMEM
+ COMPAT_CFLAGS += -DNO_MEMMEM
+ COMPAT_OBJS += compat/memmem.o
+endif
+ifdef INTERNAL_QSORT
+ COMPAT_CFLAGS += -DINTERNAL_QSORT
+ COMPAT_OBJS += compat/qsort.o
+endif
+ifdef RUNTIME_PREFIX
+ COMPAT_CFLAGS += -DRUNTIME_PREFIX
+endif
+
+ifdef DIR_HAS_BSD_GROUP_SEMANTICS
+ COMPAT_CFLAGS += -DDIR_HAS_BSD_GROUP_SEMANTICS
+endif
+ifdef NO_EXTERNAL_GREP
+ BASIC_CFLAGS += -DNO_EXTERNAL_GREP
+endif
+
+ifeq ($(PERL_PATH),)
+NO_PERL=NoThanks
+endif
+
+QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
+QUIET_SUBDIR1 =
+
+ifneq ($(findstring $(MAKEFLAGS),w),w)
+PRINT_DIR = --no-print-directory
+else # "make -w"
+NO_SUBDIR = :
+endif
+
+ifneq ($(findstring $(MAKEFLAGS),s),s)
+ifndef V
+ QUIET_CC = @echo ' ' CC $@;
+ QUIET_AR = @echo ' ' AR $@;
+ QUIET_LINK = @echo ' ' LINK $@;
+ QUIET_BUILT_IN = @echo ' ' BUILTIN $@;
+ QUIET_GEN = @echo ' ' GEN $@;
+ QUIET_SUBDIR0 = +@subdir=
+ QUIET_SUBDIR1 = ;$(NO_SUBDIR) echo ' ' SUBDIR $$subdir; \
+ $(MAKE) $(PRINT_DIR) -C $$subdir
+ export V
+ export QUIET_GEN
+ export QUIET_BUILT_IN
+endif
+endif
+
+ifdef ASCIIDOC8
+ export ASCIIDOC8
+endif
+
+# Shell quote (do not use $(call) to accommodate ancient setups);
+
+SHA1_HEADER_SQ = $(subst ','\'',$(SHA1_HEADER))
+ETC_PERFCONFIG_SQ = $(subst ','\'',$(ETC_PERFCONFIG))
+
+DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
+bindir_SQ = $(subst ','\'',$(bindir))
+bindir_relative_SQ = $(subst ','\'',$(bindir_relative))
+mandir_SQ = $(subst ','\'',$(mandir))
+infodir_SQ = $(subst ','\'',$(infodir))
+perfexecdir_SQ = $(subst ','\'',$(perfexecdir))
+template_dir_SQ = $(subst ','\'',$(template_dir))
+htmldir_SQ = $(subst ','\'',$(htmldir))
+prefix_SQ = $(subst ','\'',$(prefix))
+
+SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH))
+
+LIBS = $(PERFLIBS) $(EXTLIBS)
+
+BASIC_CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER_SQ)' \
+ $(COMPAT_CFLAGS)
+LIB_OBJS += $(COMPAT_OBJS)
+
+ALL_CFLAGS += $(BASIC_CFLAGS)
+ALL_LDFLAGS += $(BASIC_LDFLAGS)
+
+export TAR INSTALL DESTDIR SHELL_PATH
+
+
+### Build rules
+
+SHELL = $(SHELL_PATH)
+
+all:: shell_compatibility_test $(ALL_PROGRAMS) $(BUILT_INS) $(OTHER_PROGRAMS) PERF-BUILD-OPTIONS
+ifneq (,$X)
+ $(foreach p,$(patsubst %$X,%,$(filter %$X,$(ALL_PROGRAMS) $(BUILT_INS) perf$X)), test '$p' -ef '$p$X' || $(RM) '$p';)
+endif
+
+all::
+
+please_set_SHELL_PATH_to_a_more_modern_shell:
+ @$$(:)
+
+shell_compatibility_test: please_set_SHELL_PATH_to_a_more_modern_shell
+
+strip: $(PROGRAMS) perf$X
+ $(STRIP) $(STRIP_OPTS) $(PROGRAMS) perf$X
+
+perf.o: perf.c common-cmds.h PERF-CFLAGS
+ $(QUIET_CC)$(CC) -DPERF_VERSION='"$(PERF_VERSION)"' \
+ '-DPERF_HTML_PATH="$(htmldir_SQ)"' \
+ $(ALL_CFLAGS) -c $(filter %.c,$^)
+
+perf$X: perf.o $(BUILTIN_OBJS) $(PERFLIBS)
+ $(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ perf.o \
+ $(BUILTIN_OBJS) $(ALL_LDFLAGS) $(LIBS)
+
+builtin-help.o: builtin-help.c common-cmds.h PERF-CFLAGS
+ $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) \
+ '-DPERF_HTML_PATH="$(htmldir_SQ)"' \
+ '-DPERF_MAN_PATH="$(mandir_SQ)"' \
+ '-DPERF_INFO_PATH="$(infodir_SQ)"' $<
+
+$(BUILT_INS): perf$X
+ $(QUIET_BUILT_IN)$(RM) $@ && \
+ ln perf$X $@ 2>/dev/null || \
+ ln -s perf$X $@ 2>/dev/null || \
+ cp perf$X $@
+
+common-cmds.h: util/generate-cmdlist.sh command-list.txt
+
+common-cmds.h: $(wildcard Documentation/perf-*.txt)
+ $(QUIET_GEN)util/generate-cmdlist.sh > $@+ && mv $@+ $@
+
+$(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
+ $(QUIET_GEN)$(RM) $@ $@+ && \
+ sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
+ -e 's|@SHELL_PATH@|$(SHELL_PATH_SQ)|' \
+ -e 's|@@PERL@@|$(PERL_PATH_SQ)|g' \
+ -e 's/@@PERF_VERSION@@/$(PERF_VERSION)/g' \
+ -e 's/@@NO_CURL@@/$(NO_CURL)/g' \
+ $@.sh >$@+ && \
+ chmod +x $@+ && \
+ mv $@+ $@
+
+configure: configure.ac
+ $(QUIET_GEN)$(RM) $@ $<+ && \
+ sed -e 's/@@PERF_VERSION@@/$(PERF_VERSION)/g' \
+ $< > $<+ && \
+ autoconf -o $@ $<+ && \
+ $(RM) $<+
+
+# These can record PERF_VERSION
+perf.o perf.spec \
+ $(patsubst %.sh,%,$(SCRIPT_SH)) \
+ $(patsubst %.perl,%,$(SCRIPT_PERL)) \
+ : PERF-VERSION-FILE
+
+%.o: %.c PERF-CFLAGS
+ $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) $<
+%.s: %.c PERF-CFLAGS
+ $(QUIET_CC)$(CC) -S $(ALL_CFLAGS) $<
+%.o: %.S
+ $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) $<
+
+util/exec_cmd.o: util/exec_cmd.c PERF-CFLAGS
+ $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) \
+ '-DPERF_EXEC_PATH="$(perfexecdir_SQ)"' \
+ '-DBINDIR="$(bindir_relative_SQ)"' \
+ '-DPREFIX="$(prefix_SQ)"' \
+ $<
+
+builtin-init-db.o: builtin-init-db.c PERF-CFLAGS
+ $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) -DDEFAULT_PERF_TEMPLATE_DIR='"$(template_dir_SQ)"' $<
+
+util/config.o: util/config.c PERF-CFLAGS
+ $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<
+
+perf-%$X: %.o $(PERFLIBS)
+ $(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)
+
+$(LIB_OBJS) $(BUILTIN_OBJS): $(LIB_H)
+$(patsubst perf-%$X,%.o,$(PROGRAMS)): $(LIB_H) $(wildcard */*.h)
+builtin-revert.o wt-status.o: wt-status.h
+
+$(LIB_FILE): $(LIB_OBJS)
+ $(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(LIB_OBJS)
+
+doc:
+ $(MAKE) -C Documentation all
+
+man:
+ $(MAKE) -C Documentation man
+
+html:
+ $(MAKE) -C Documentation html
+
+info:
+ $(MAKE) -C Documentation info
+
+pdf:
+ $(MAKE) -C Documentation pdf
+
+TAGS:
+ $(RM) TAGS
+ $(FIND) . -name '*.[hcS]' -print | xargs etags -a
+
+tags:
+ $(RM) tags
+ $(FIND) . -name '*.[hcS]' -print | xargs ctags -a
+
+cscope:
+ $(RM) cscope*
+ $(FIND) . -name '*.[hcS]' -print | xargs cscope -b
+
+### Detect prefix changes
+TRACK_CFLAGS = $(subst ','\'',$(ALL_CFLAGS)):\
+ $(bindir_SQ):$(perfexecdir_SQ):$(template_dir_SQ):$(prefix_SQ)
+
+PERF-CFLAGS: .FORCE-PERF-CFLAGS
+ @FLAGS='$(TRACK_CFLAGS)'; \
+ if test x"$$FLAGS" != x"`cat PERF-CFLAGS 2>/dev/null`" ; then \
+ echo 1>&2 " * new build flags or prefix"; \
+ echo "$$FLAGS" >PERF-CFLAGS; \
+ fi
+
+# We need to apply sq twice, once to protect from the shell
+# that runs PERF-BUILD-OPTIONS, and then again to protect it
+# and the first level quoting from the shell that runs "echo".
+PERF-BUILD-OPTIONS: .FORCE-PERF-BUILD-OPTIONS
+ @echo SHELL_PATH=\''$(subst ','\'',$(SHELL_PATH_SQ))'\' >$@
+ @echo TAR=\''$(subst ','\'',$(subst ','\'',$(TAR)))'\' >>$@
+ @echo NO_CURL=\''$(subst ','\'',$(subst ','\'',$(NO_CURL)))'\' >>$@
+ @echo NO_PERL=\''$(subst ','\'',$(subst ','\'',$(NO_PERL)))'\' >>$@
+
+### Testing rules
+
+#
+# None right now:
+#
+# TEST_PROGRAMS += test-something$X
+
+all:: $(TEST_PROGRAMS)
+
+# GNU make supports exporting all variables by "export" without parameters.
+# However, the environment gets quite big, and some programs have problems
+# with that.
+
+export NO_SVN_TESTS
+
+check: common-cmds.h
+ if sparse; \
+ then \
+ for i in *.c */*.c; \
+ do \
+ sparse $(ALL_CFLAGS) $(SPARSE_FLAGS) $$i || exit; \
+ done; \
+ else \
+ echo 2>&1 "Did you mean 'make test'?"; \
+ exit 1; \
+ fi
+
+remove-dashes:
+ ./fixup-builtins $(BUILT_INS) $(PROGRAMS) $(SCRIPTS)
+
+### Installation rules
+
+ifneq ($(filter /%,$(firstword $(template_dir))),)
+template_instdir = $(template_dir)
+else
+template_instdir = $(prefix)/$(template_dir)
+endif
+export template_instdir
+
+ifneq ($(filter /%,$(firstword $(perfexecdir))),)
+perfexec_instdir = $(perfexecdir)
+else
+perfexec_instdir = $(prefix)/$(perfexecdir)
+endif
+perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))
+export perfexec_instdir
+
+install: all
+ $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(bindir_SQ)'
+ $(INSTALL) perf$X '$(DESTDIR_SQ)$(bindir_SQ)'
+ifdef BUILT_INS
+ $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
+ $(INSTALL) $(BUILT_INS) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
+ifneq (,$X)
+ $(foreach p,$(patsubst %$X,%,$(filter %$X,$(ALL_PROGRAMS) $(BUILT_INS) perf$X)), $(RM) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$p';)
+endif
+endif
+
+install-doc:
+ $(MAKE) -C Documentation install
+
+install-man:
+ $(MAKE) -C Documentation install-man
+
+install-html:
+ $(MAKE) -C Documentation install-html
+
+install-info:
+ $(MAKE) -C Documentation install-info
+
+install-pdf:
+ $(MAKE) -C Documentation install-pdf
+
+quick-install-doc:
+ $(MAKE) -C Documentation quick-install
+
+quick-install-man:
+ $(MAKE) -C Documentation quick-install-man
+
+quick-install-html:
+ $(MAKE) -C Documentation quick-install-html
+
+
+### Maintainer's dist rules
+#
+# None right now
+#
+#
+# perf.spec: perf.spec.in
+# sed -e 's/@@VERSION@@/$(PERF_VERSION)/g' < $< > $@+
+# mv $@+ $@
+#
+# PERF_TARNAME=perf-$(PERF_VERSION)
+# dist: perf.spec perf-archive$(X) configure
+# ./perf-archive --format=tar \
+# --prefix=$(PERF_TARNAME)/ HEAD^{tree} > $(PERF_TARNAME).tar
+# @mkdir -p $(PERF_TARNAME)
+# @cp perf.spec configure $(PERF_TARNAME)
+# @echo $(PERF_VERSION) > $(PERF_TARNAME)/version
+# $(TAR) rf $(PERF_TARNAME).tar \
+# $(PERF_TARNAME)/perf.spec \
+# $(PERF_TARNAME)/configure \
+# $(PERF_TARNAME)/version
+# @$(RM) -r $(PERF_TARNAME)
+# gzip -f -9 $(PERF_TARNAME).tar
+#
+# htmldocs = perf-htmldocs-$(PERF_VERSION)
+# manpages = perf-manpages-$(PERF_VERSION)
+# dist-doc:
+# $(RM) -r .doc-tmp-dir
+# mkdir .doc-tmp-dir
+# $(MAKE) -C Documentation WEBDOC_DEST=../.doc-tmp-dir install-webdoc
+# cd .doc-tmp-dir && $(TAR) cf ../$(htmldocs).tar .
+# gzip -n -9 -f $(htmldocs).tar
+# :
+# $(RM) -r .doc-tmp-dir
+# mkdir -p .doc-tmp-dir/man1 .doc-tmp-dir/man5 .doc-tmp-dir/man7
+# $(MAKE) -C Documentation DESTDIR=./ \
+# man1dir=../.doc-tmp-dir/man1 \
+# man5dir=../.doc-tmp-dir/man5 \
+# man7dir=../.doc-tmp-dir/man7 \
+# install
+# cd .doc-tmp-dir && $(TAR) cf ../$(manpages).tar .
+# gzip -n -9 -f $(manpages).tar
+# $(RM) -r .doc-tmp-dir
+#
+# rpm: dist
+# $(RPMBUILD) -ta $(PERF_TARNAME).tar.gz
+
+### Cleaning rules
+
+distclean: clean
+# $(RM) configure
+
+clean:
+ $(RM) *.o */*.o $(LIB_FILE)
+ $(RM) $(ALL_PROGRAMS) $(BUILT_INS) perf$X
+ $(RM) $(TEST_PROGRAMS)
+ $(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h TAGS tags cscope*
+ $(RM) -r autom4te.cache
+ $(RM) config.log config.mak.autogen config.mak.append config.status config.cache
+ $(RM) -r $(PERF_TARNAME) .doc-tmp-dir
+ $(RM) $(PERF_TARNAME).tar.gz perf-core_$(PERF_VERSION)-*.tar.gz
+ $(RM) $(htmldocs).tar.gz $(manpages).tar.gz
+ $(MAKE) -C Documentation/ clean
+ $(RM) PERF-VERSION-FILE PERF-CFLAGS PERF-BUILD-OPTIONS
+
+.PHONY: all install clean strip
+.PHONY: shell_compatibility_test please_set_SHELL_PATH_to_a_more_modern_shell
+.PHONY: .FORCE-PERF-VERSION-FILE TAGS tags cscope .FORCE-PERF-CFLAGS
+.PHONY: .FORCE-PERF-BUILD-OPTIONS
+
+### Make sure built-ins do not have dups and listed in perf.c
+#
+check-builtins::
+ ./check-builtins.sh
+
+### Test suite coverage testing
+#
+# None right now
+#
+# .PHONY: coverage coverage-clean coverage-build coverage-report
+#
+# coverage:
+# $(MAKE) coverage-build
+# $(MAKE) coverage-report
+#
+# coverage-clean:
+# rm -f *.gcda *.gcno
+#
+# COVERAGE_CFLAGS = $(CFLAGS) -O0 -ftest-coverage -fprofile-arcs
+# COVERAGE_LDFLAGS = $(CFLAGS) -O0 -lgcov
+#
+# coverage-build: coverage-clean
+# $(MAKE) CFLAGS="$(COVERAGE_CFLAGS)" LDFLAGS="$(COVERAGE_LDFLAGS)" all
+# $(MAKE) CFLAGS="$(COVERAGE_CFLAGS)" LDFLAGS="$(COVERAGE_LDFLAGS)" \
+# -j1 test
+#
+# coverage-report:
+# gcov -b *.c */*.c
+# grep '^function.*called 0 ' *.c.gcov */*.c.gcov \
+# | sed -e 's/\([^:]*\)\.gcov: *function \([^ ]*\) called.*/\1: \2/' \
+# | tee coverage-untested-functions
--- /dev/null
+/*
+ * builtin-annotate.c
+ *
+ * Builtin annotate command: Analyze the perf.data input file,
+ * look up and read DSOs and symbol information and display
+ * a histogram of results, along various sorting keys.
+ */
+#include "builtin.h"
+
+#include "util/util.h"
+
+#include "util/color.h"
+#include "util/list.h"
+#include "util/cache.h"
+#include "util/rbtree.h"
+#include "util/symbol.h"
+#include "util/string.h"
+
+#include "perf.h"
+
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+
+#define SHOW_KERNEL 1
+#define SHOW_USER 2
+#define SHOW_HV 4
+
+static char const *input_name = "perf.data";
+static char *vmlinux = "vmlinux";
+
+static char default_sort_order[] = "comm,symbol";
+static char *sort_order = default_sort_order;
+
+static int input;
+static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
+
+static int dump_trace = 0;
+#define dprintf(x...) do { if (dump_trace) printf(x); } while (0)
+
+static int verbose;
+
+static unsigned long page_size;
+static unsigned long mmap_window = 32;
+
+struct ip_event {
+ struct perf_event_header header;
+ __u64 ip;
+ __u32 pid, tid;
+};
+
+struct mmap_event {
+ struct perf_event_header header;
+ __u32 pid, tid;
+ __u64 start;
+ __u64 len;
+ __u64 pgoff;
+ char filename[PATH_MAX];
+};
+
+struct comm_event {
+ struct perf_event_header header;
+ __u32 pid, tid;
+ char comm[16];
+};
+
+struct fork_event {
+ struct perf_event_header header;
+ __u32 pid, ppid;
+};
+
+struct period_event {
+ struct perf_event_header header;
+ __u64 time;
+ __u64 id;
+ __u64 sample_period;
+};
+
+typedef union event_union {
+ struct perf_event_header header;
+ struct ip_event ip;
+ struct mmap_event mmap;
+ struct comm_event comm;
+ struct fork_event fork;
+ struct period_event period;
+} event_t;
+
+static LIST_HEAD(dsos);
+static struct dso *kernel_dso;
+static struct dso *vdso;
+
+
+static void dsos__add(struct dso *dso)
+{
+ list_add_tail(&dso->node, &dsos);
+}
+
+static struct dso *dsos__find(const char *name)
+{
+ struct dso *pos;
+
+ list_for_each_entry(pos, &dsos, node)
+ if (strcmp(pos->name, name) == 0)
+ return pos;
+ return NULL;
+}
+
+static struct dso *dsos__findnew(const char *name)
+{
+ struct dso *dso = dsos__find(name);
+ int nr;
+
+ if (dso)
+ return dso;
+
+ dso = dso__new(name, 0);
+ if (!dso)
+ goto out_delete_dso;
+
+ nr = dso__load(dso, NULL, verbose);
+ if (nr < 0) {
+ if (verbose)
+ fprintf(stderr, "Failed to open: %s\n", name);
+ goto out_delete_dso;
+ }
+ if (!nr && verbose) {
+ fprintf(stderr,
+ "No symbols found in: %s, maybe install a debug package?\n",
+ name);
+ }
+
+ dsos__add(dso);
+
+ return dso;
+
+out_delete_dso:
+ dso__delete(dso);
+ return NULL;
+}
+
+static void dsos__fprintf(FILE *fp)
+{
+ struct dso *pos;
+
+ list_for_each_entry(pos, &dsos, node)
+ dso__fprintf(pos, fp);
+}
+
+static struct symbol *vdso__find_symbol(struct dso *dso, __u64 ip)
+{
+ return dso__find_symbol(kernel_dso, ip);
+}
+
+static int load_kernel(void)
+{
+ int err;
+
+ kernel_dso = dso__new("[kernel]", 0);
+ if (!kernel_dso)
+ return -1;
+
+ err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
+ if (err) {
+ dso__delete(kernel_dso);
+ kernel_dso = NULL;
+ } else
+ dsos__add(kernel_dso);
+
+ vdso = dso__new("[vdso]", 0);
+ if (!vdso)
+ return -1;
+
+ vdso->find_symbol = vdso__find_symbol;
+
+ dsos__add(vdso);
+
+ return err;
+}
+
+struct map {
+ struct list_head node;
+ __u64 start;
+ __u64 end;
+ __u64 pgoff;
+ __u64 (*map_ip)(struct map *, __u64);
+ struct dso *dso;
+};
+
+static __u64 map__map_ip(struct map *map, __u64 ip)
+{
+ return ip - map->start + map->pgoff;
+}
+
+static __u64 vdso__map_ip(struct map *map, __u64 ip)
+{
+ return ip;
+}
+
+static struct map *map__new(struct mmap_event *event)
+{
+ struct map *self = malloc(sizeof(*self));
+
+ if (self != NULL) {
+ const char *filename = event->filename;
+
+ self->start = event->start;
+ self->end = event->start + event->len;
+ self->pgoff = event->pgoff;
+
+ self->dso = dsos__findnew(filename);
+ if (self->dso == NULL)
+ goto out_delete;
+
+ if (self->dso == vdso)
+ self->map_ip = vdso__map_ip;
+ else
+ self->map_ip = map__map_ip;
+ }
+ return self;
+out_delete:
+ free(self);
+ return NULL;
+}
+
+static struct map *map__clone(struct map *self)
+{
+ struct map *map = malloc(sizeof(*self));
+
+ if (!map)
+ return NULL;
+
+ memcpy(map, self, sizeof(*self));
+
+ return map;
+}
+
+static int map__overlap(struct map *l, struct map *r)
+{
+ if (l->start > r->start) {
+ struct map *t = l;
+ l = r;
+ r = t;
+ }
+
+ if (l->end > r->start)
+ return 1;
+
+ return 0;
+}
+
+static size_t map__fprintf(struct map *self, FILE *fp)
+{
+ return fprintf(fp, " %Lx-%Lx %Lx %s\n",
+ self->start, self->end, self->pgoff, self->dso->name);
+}
+
+
+struct thread {
+ struct rb_node rb_node;
+ struct list_head maps;
+ pid_t pid;
+ char *comm;
+};
+
+static struct thread *thread__new(pid_t pid)
+{
+ struct thread *self = malloc(sizeof(*self));
+
+ if (self != NULL) {
+ self->pid = pid;
+ self->comm = malloc(32);
+ if (self->comm)
+ snprintf(self->comm, 32, ":%d", self->pid);
+ INIT_LIST_HEAD(&self->maps);
+ }
+
+ return self;
+}
+
+static int thread__set_comm(struct thread *self, const char *comm)
+{
+ if (self->comm)
+ free(self->comm);
+ self->comm = strdup(comm);
+ return self->comm ? 0 : -ENOMEM;
+}
+
+static size_t thread__fprintf(struct thread *self, FILE *fp)
+{
+ struct map *pos;
+ size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
+
+ list_for_each_entry(pos, &self->maps, node)
+ ret += map__fprintf(pos, fp);
+
+ return ret;
+}
+
+
+static struct rb_root threads;
+static struct thread *last_match;
+
+static struct thread *threads__findnew(pid_t pid)
+{
+ struct rb_node **p = &threads.rb_node;
+ struct rb_node *parent = NULL;
+ struct thread *th;
+
+ /*
+ * Font-end cache - PID lookups come in blocks,
+ * so most of the time we dont have to look up
+ * the full rbtree:
+ */
+ if (last_match && last_match->pid == pid)
+ return last_match;
+
+ while (*p != NULL) {
+ parent = *p;
+ th = rb_entry(parent, struct thread, rb_node);
+
+ if (th->pid == pid) {
+ last_match = th;
+ return th;
+ }
+
+ if (pid < th->pid)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ th = thread__new(pid);
+ if (th != NULL) {
+ rb_link_node(&th->rb_node, parent, p);
+ rb_insert_color(&th->rb_node, &threads);
+ last_match = th;
+ }
+
+ return th;
+}
+
+static void thread__insert_map(struct thread *self, struct map *map)
+{
+ struct map *pos, *tmp;
+
+ list_for_each_entry_safe(pos, tmp, &self->maps, node) {
+ if (map__overlap(pos, map)) {
+ list_del_init(&pos->node);
+ /* XXX leaks dsos */
+ free(pos);
+ }
+ }
+
+ list_add_tail(&map->node, &self->maps);
+}
+
+static int thread__fork(struct thread *self, struct thread *parent)
+{
+ struct map *map;
+
+ if (self->comm)
+ free(self->comm);
+ self->comm = strdup(parent->comm);
+ if (!self->comm)
+ return -ENOMEM;
+
+ list_for_each_entry(map, &parent->maps, node) {
+ struct map *new = map__clone(map);
+ if (!new)
+ return -ENOMEM;
+ thread__insert_map(self, new);
+ }
+
+ return 0;
+}
+
+static struct map *thread__find_map(struct thread *self, __u64 ip)
+{
+ struct map *pos;
+
+ if (self == NULL)
+ return NULL;
+
+ list_for_each_entry(pos, &self->maps, node)
+ if (ip >= pos->start && ip <= pos->end)
+ return pos;
+
+ return NULL;
+}
+
+static size_t threads__fprintf(FILE *fp)
+{
+ size_t ret = 0;
+ struct rb_node *nd;
+
+ for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
+ struct thread *pos = rb_entry(nd, struct thread, rb_node);
+
+ ret += thread__fprintf(pos, fp);
+ }
+
+ return ret;
+}
+
+/*
+ * histogram, sorted on item, collects counts
+ */
+
+static struct rb_root hist;
+
+struct hist_entry {
+ struct rb_node rb_node;
+
+ struct thread *thread;
+ struct map *map;
+ struct dso *dso;
+ struct symbol *sym;
+ __u64 ip;
+ char level;
+
+ uint32_t count;
+};
+
+/*
+ * configurable sorting bits
+ */
+
+struct sort_entry {
+ struct list_head list;
+
+ char *header;
+
+ int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
+ int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
+ size_t (*print)(FILE *fp, struct hist_entry *);
+};
+
+/* --sort pid */
+
+static int64_t
+sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return right->thread->pid - left->thread->pid;
+}
+
+static size_t
+sort__thread_print(FILE *fp, struct hist_entry *self)
+{
+ return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
+}
+
+static struct sort_entry sort_thread = {
+ .header = " Command: Pid",
+ .cmp = sort__thread_cmp,
+ .print = sort__thread_print,
+};
+
+/* --sort comm */
+
+static int64_t
+sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return right->thread->pid - left->thread->pid;
+}
+
+static int64_t
+sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
+{
+ char *comm_l = left->thread->comm;
+ char *comm_r = right->thread->comm;
+
+ if (!comm_l || !comm_r) {
+ if (!comm_l && !comm_r)
+ return 0;
+ else if (!comm_l)
+ return -1;
+ else
+ return 1;
+ }
+
+ return strcmp(comm_l, comm_r);
+}
+
+static size_t
+sort__comm_print(FILE *fp, struct hist_entry *self)
+{
+ return fprintf(fp, "%16s", self->thread->comm);
+}
+
+static struct sort_entry sort_comm = {
+ .header = " Command",
+ .cmp = sort__comm_cmp,
+ .collapse = sort__comm_collapse,
+ .print = sort__comm_print,
+};
+
+/* --sort dso */
+
+static int64_t
+sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ struct dso *dso_l = left->dso;
+ struct dso *dso_r = right->dso;
+
+ if (!dso_l || !dso_r) {
+ if (!dso_l && !dso_r)
+ return 0;
+ else if (!dso_l)
+ return -1;
+ else
+ return 1;
+ }
+
+ return strcmp(dso_l->name, dso_r->name);
+}
+
+static size_t
+sort__dso_print(FILE *fp, struct hist_entry *self)
+{
+ if (self->dso)
+ return fprintf(fp, "%-25s", self->dso->name);
+
+ return fprintf(fp, "%016llx ", (__u64)self->ip);
+}
+
+static struct sort_entry sort_dso = {
+ .header = "Shared Object ",
+ .cmp = sort__dso_cmp,
+ .print = sort__dso_print,
+};
+
+/* --sort symbol */
+
+static int64_t
+sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ __u64 ip_l, ip_r;
+
+ if (left->sym == right->sym)
+ return 0;
+
+ ip_l = left->sym ? left->sym->start : left->ip;
+ ip_r = right->sym ? right->sym->start : right->ip;
+
+ return (int64_t)(ip_r - ip_l);
+}
+
+static size_t
+sort__sym_print(FILE *fp, struct hist_entry *self)
+{
+ size_t ret = 0;
+
+ if (verbose)
+ ret += fprintf(fp, "%#018llx ", (__u64)self->ip);
+
+ if (self->sym) {
+ ret += fprintf(fp, "[%c] %s",
+ self->dso == kernel_dso ? 'k' : '.', self->sym->name);
+ } else {
+ ret += fprintf(fp, "%#016llx", (__u64)self->ip);
+ }
+
+ return ret;
+}
+
+static struct sort_entry sort_sym = {
+ .header = "Symbol",
+ .cmp = sort__sym_cmp,
+ .print = sort__sym_print,
+};
+
+static int sort__need_collapse = 0;
+
+struct sort_dimension {
+ char *name;
+ struct sort_entry *entry;
+ int taken;
+};
+
+static struct sort_dimension sort_dimensions[] = {
+ { .name = "pid", .entry = &sort_thread, },
+ { .name = "comm", .entry = &sort_comm, },
+ { .name = "dso", .entry = &sort_dso, },
+ { .name = "symbol", .entry = &sort_sym, },
+};
+
+static LIST_HEAD(hist_entry__sort_list);
+
+static int sort_dimension__add(char *tok)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
+ struct sort_dimension *sd = &sort_dimensions[i];
+
+ if (sd->taken)
+ continue;
+
+ if (strncasecmp(tok, sd->name, strlen(tok)))
+ continue;
+
+ if (sd->entry->collapse)
+ sort__need_collapse = 1;
+
+ list_add_tail(&sd->entry->list, &hist_entry__sort_list);
+ sd->taken = 1;
+
+ return 0;
+ }
+
+ return -ESRCH;
+}
+
+static int64_t
+hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ struct sort_entry *se;
+ int64_t cmp = 0;
+
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ cmp = se->cmp(left, right);
+ if (cmp)
+ break;
+ }
+
+ return cmp;
+}
+
+static int64_t
+hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
+{
+ struct sort_entry *se;
+ int64_t cmp = 0;
+
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ int64_t (*f)(struct hist_entry *, struct hist_entry *);
+
+ f = se->collapse ?: se->cmp;
+
+ cmp = f(left, right);
+ if (cmp)
+ break;
+ }
+
+ return cmp;
+}
+
+/*
+ * collect histogram counts
+ */
+static void hist_hit(struct hist_entry *he, __u64 ip)
+{
+ unsigned int sym_size, offset;
+ struct symbol *sym = he->sym;
+
+ he->count++;
+
+ if (!sym || !sym->hist)
+ return;
+
+ sym_size = sym->end - sym->start;
+ offset = ip - sym->start;
+
+ if (offset >= sym_size)
+ return;
+
+ sym->hist_sum++;
+ sym->hist[offset]++;
+
+ if (verbose >= 3)
+ printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
+ (void *)(unsigned long)he->sym->start,
+ he->sym->name,
+ (void *)(unsigned long)ip, ip - he->sym->start,
+ sym->hist[offset]);
+}
+
+static int
+hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
+ struct symbol *sym, __u64 ip, char level)
+{
+ struct rb_node **p = &hist.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *he;
+ struct hist_entry entry = {
+ .thread = thread,
+ .map = map,
+ .dso = dso,
+ .sym = sym,
+ .ip = ip,
+ .level = level,
+ .count = 1,
+ };
+ int cmp;
+
+ while (*p != NULL) {
+ parent = *p;
+ he = rb_entry(parent, struct hist_entry, rb_node);
+
+ cmp = hist_entry__cmp(&entry, he);
+
+ if (!cmp) {
+ hist_hit(he, ip);
+
+ return 0;
+ }
+
+ if (cmp < 0)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ he = malloc(sizeof(*he));
+ if (!he)
+ return -ENOMEM;
+ *he = entry;
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &hist);
+
+ return 0;
+}
+
+static void hist_entry__free(struct hist_entry *he)
+{
+ free(he);
+}
+
+/*
+ * collapse the histogram
+ */
+
+static struct rb_root collapse_hists;
+
+static void collapse__insert_entry(struct hist_entry *he)
+{
+ struct rb_node **p = &collapse_hists.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *iter;
+ int64_t cmp;
+
+ while (*p != NULL) {
+ parent = *p;
+ iter = rb_entry(parent, struct hist_entry, rb_node);
+
+ cmp = hist_entry__collapse(iter, he);
+
+ if (!cmp) {
+ iter->count += he->count;
+ hist_entry__free(he);
+ return;
+ }
+
+ if (cmp < 0)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &collapse_hists);
+}
+
+static void collapse__resort(void)
+{
+ struct rb_node *next;
+ struct hist_entry *n;
+
+ if (!sort__need_collapse)
+ return;
+
+ next = rb_first(&hist);
+ while (next) {
+ n = rb_entry(next, struct hist_entry, rb_node);
+ next = rb_next(&n->rb_node);
+
+ rb_erase(&n->rb_node, &hist);
+ collapse__insert_entry(n);
+ }
+}
+
+/*
+ * reverse the map, sort on count.
+ */
+
+static struct rb_root output_hists;
+
+static void output__insert_entry(struct hist_entry *he)
+{
+ struct rb_node **p = &output_hists.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *iter;
+
+ while (*p != NULL) {
+ parent = *p;
+ iter = rb_entry(parent, struct hist_entry, rb_node);
+
+ if (he->count > iter->count)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &output_hists);
+}
+
+static void output__resort(void)
+{
+ struct rb_node *next;
+ struct hist_entry *n;
+ struct rb_root *tree = &hist;
+
+ if (sort__need_collapse)
+ tree = &collapse_hists;
+
+ next = rb_first(tree);
+
+ while (next) {
+ n = rb_entry(next, struct hist_entry, rb_node);
+ next = rb_next(&n->rb_node);
+
+ rb_erase(&n->rb_node, tree);
+ output__insert_entry(n);
+ }
+}
+
+static void register_idle_thread(void)
+{
+ struct thread *thread = threads__findnew(0);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, "[idle]")) {
+ fprintf(stderr, "problem inserting idle task.\n");
+ exit(-1);
+ }
+}
+
+static unsigned long total = 0,
+ total_mmap = 0,
+ total_comm = 0,
+ total_fork = 0,
+ total_unknown = 0;
+
+static int
+process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ char level;
+ int show = 0;
+ struct dso *dso = NULL;
+ struct thread *thread = threads__findnew(event->ip.pid);
+ __u64 ip = event->ip.ip;
+ struct map *map = NULL;
+
+ dprintf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.misc,
+ event->ip.pid,
+ (void *)(long)ip);
+
+ dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
+
+ if (thread == NULL) {
+ fprintf(stderr, "problem processing %d event, skipping it.\n",
+ event->header.type);
+ return -1;
+ }
+
+ if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
+ show = SHOW_KERNEL;
+ level = 'k';
+
+ dso = kernel_dso;
+
+ dprintf(" ...... dso: %s\n", dso->name);
+
+ } else if (event->header.misc & PERF_EVENT_MISC_USER) {
+
+ show = SHOW_USER;
+ level = '.';
+
+ map = thread__find_map(thread, ip);
+ if (map != NULL) {
+ ip = map->map_ip(map, ip);
+ dso = map->dso;
+ } else {
+ /*
+ * If this is outside of all known maps,
+ * and is a negative address, try to look it
+ * up in the kernel dso, as it might be a
+ * vsyscall (which executes in user-mode):
+ */
+ if ((long long)ip < 0)
+ dso = kernel_dso;
+ }
+ dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
+
+ } else {
+ show = SHOW_HV;
+ level = 'H';
+ dprintf(" ...... dso: [hypervisor]\n");
+ }
+
+ if (show & show_mask) {
+ struct symbol *sym = NULL;
+
+ if (dso)
+ sym = dso->find_symbol(dso, ip);
+
+ if (hist_entry__add(thread, map, dso, sym, ip, level)) {
+ fprintf(stderr,
+ "problem incrementing symbol count, skipping event\n");
+ return -1;
+ }
+ }
+ total++;
+
+ return 0;
+}
+
+static int
+process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->mmap.pid);
+ struct map *map = map__new(&event->mmap);
+
+ dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->mmap.pid,
+ (void *)(long)event->mmap.start,
+ (void *)(long)event->mmap.len,
+ (void *)(long)event->mmap.pgoff,
+ event->mmap.filename);
+
+ if (thread == NULL || map == NULL) {
+ dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
+ return 0;
+ }
+
+ thread__insert_map(thread, map);
+ total_mmap++;
+
+ return 0;
+}
+
+static int
+process_comm_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->comm.pid);
+
+ dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->comm.comm, event->comm.pid);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, event->comm.comm)) {
+ dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
+ return -1;
+ }
+ total_comm++;
+
+ return 0;
+}
+
+static int
+process_fork_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->fork.pid);
+ struct thread *parent = threads__findnew(event->fork.ppid);
+
+ dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->fork.pid, event->fork.ppid);
+
+ if (!thread || !parent || thread__fork(thread, parent)) {
+ dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
+ return -1;
+ }
+ total_fork++;
+
+ return 0;
+}
+
+static int
+process_period_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->period.time,
+ event->period.id,
+ event->period.sample_period);
+
+ return 0;
+}
+
+static int
+process_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
+ return process_overflow_event(event, offset, head);
+
+ switch (event->header.type) {
+ case PERF_EVENT_MMAP:
+ return process_mmap_event(event, offset, head);
+
+ case PERF_EVENT_COMM:
+ return process_comm_event(event, offset, head);
+
+ case PERF_EVENT_FORK:
+ return process_fork_event(event, offset, head);
+
+ case PERF_EVENT_PERIOD:
+ return process_period_event(event, offset, head);
+ /*
+ * We dont process them right now but they are fine:
+ */
+
+ case PERF_EVENT_THROTTLE:
+ case PERF_EVENT_UNTHROTTLE:
+ return 0;
+
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+parse_line(FILE *file, struct symbol *sym, __u64 start, __u64 len)
+{
+ char *line = NULL, *tmp, *tmp2;
+ unsigned int offset;
+ size_t line_len;
+ __u64 line_ip;
+ int ret;
+ char *c;
+
+ if (getline(&line, &line_len, file) < 0)
+ return -1;
+ if (!line)
+ return -1;
+
+ c = strchr(line, '\n');
+ if (c)
+ *c = 0;
+
+ line_ip = -1;
+ offset = 0;
+ ret = -2;
+
+ /*
+ * Strip leading spaces:
+ */
+ tmp = line;
+ while (*tmp) {
+ if (*tmp != ' ')
+ break;
+ tmp++;
+ }
+
+ if (*tmp) {
+ /*
+ * Parse hexa addresses followed by ':'
+ */
+ line_ip = strtoull(tmp, &tmp2, 16);
+ if (*tmp2 != ':')
+ line_ip = -1;
+ }
+
+ if (line_ip != -1) {
+ unsigned int hits = 0;
+ double percent = 0.0;
+ char *color = PERF_COLOR_NORMAL;
+
+ offset = line_ip - start;
+ if (offset < len)
+ hits = sym->hist[offset];
+
+ if (sym->hist_sum)
+ percent = 100.0 * hits / sym->hist_sum;
+
+ /*
+ * We color high-overhead entries in red, mid-overhead
+ * entries in green - and keep the low overhead places
+ * normal:
+ */
+ if (percent >= 5.0)
+ color = PERF_COLOR_RED;
+ else {
+ if (percent > 0.5)
+ color = PERF_COLOR_GREEN;
+ }
+
+ color_fprintf(stdout, color, " %7.2f", percent);
+ printf(" : ");
+ color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", line);
+ } else {
+ if (!*line)
+ printf(" :\n");
+ else
+ printf(" : %s\n", line);
+ }
+
+ return 0;
+}
+
+static void annotate_sym(struct dso *dso, struct symbol *sym)
+{
+ char *filename = dso->name;
+ __u64 start, end, len;
+ char command[PATH_MAX*2];
+ FILE *file;
+
+ if (!filename)
+ return;
+ if (dso == kernel_dso)
+ filename = vmlinux;
+
+ printf("\n------------------------------------------------\n");
+ printf(" Percent | Source code & Disassembly of %s\n", filename);
+ printf("------------------------------------------------\n");
+
+ if (verbose >= 2)
+ printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
+
+ start = sym->obj_start;
+ if (!start)
+ start = sym->start;
+
+ end = start + sym->end - sym->start + 1;
+ len = sym->end - sym->start;
+
+ sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s", (__u64)start, (__u64)end, filename);
+
+ if (verbose >= 3)
+ printf("doing: %s\n", command);
+
+ file = popen(command, "r");
+ if (!file)
+ return;
+
+ while (!feof(file)) {
+ if (parse_line(file, sym, start, len) < 0)
+ break;
+ }
+
+ pclose(file);
+}
+
+static void find_annotations(void)
+{
+ struct rb_node *nd;
+ struct dso *dso;
+ int count = 0;
+
+ list_for_each_entry(dso, &dsos, node) {
+
+ for (nd = rb_first(&dso->syms); nd; nd = rb_next(nd)) {
+ struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
+
+ if (sym->hist) {
+ annotate_sym(dso, sym);
+ count++;
+ }
+ }
+ }
+
+ if (!count)
+ printf(" Error: symbol '%s' not present amongst the samples.\n", sym_hist_filter);
+}
+
+static int __cmd_annotate(void)
+{
+ int ret, rc = EXIT_FAILURE;
+ unsigned long offset = 0;
+ unsigned long head = 0;
+ struct stat stat;
+ event_t *event;
+ uint32_t size;
+ char *buf;
+
+ register_idle_thread();
+
+ input = open(input_name, O_RDONLY);
+ if (input < 0) {
+ perror("failed to open file");
+ exit(-1);
+ }
+
+ ret = fstat(input, &stat);
+ if (ret < 0) {
+ perror("failed to stat file");
+ exit(-1);
+ }
+
+ if (!stat.st_size) {
+ fprintf(stderr, "zero-sized file, nothing to do!\n");
+ exit(0);
+ }
+
+ if (load_kernel() < 0) {
+ perror("failed to load kernel symbols");
+ return EXIT_FAILURE;
+ }
+
+remap:
+ buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
+ MAP_SHARED, input, offset);
+ if (buf == MAP_FAILED) {
+ perror("failed to mmap file");
+ exit(-1);
+ }
+
+more:
+ event = (event_t *)(buf + head);
+
+ size = event->header.size;
+ if (!size)
+ size = 8;
+
+ if (head + event->header.size >= page_size * mmap_window) {
+ unsigned long shift = page_size * (head / page_size);
+ int ret;
+
+ ret = munmap(buf, page_size * mmap_window);
+ assert(ret == 0);
+
+ offset += shift;
+ head -= shift;
+ goto remap;
+ }
+
+ size = event->header.size;
+
+ dprintf("%p [%p]: event: %d\n",
+ (void *)(offset + head),
+ (void *)(long)event->header.size,
+ event->header.type);
+
+ if (!size || process_event(event, offset, head) < 0) {
+
+ dprintf("%p [%p]: skipping unknown header type: %d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.type);
+
+ total_unknown++;
+
+ /*
+ * assume we lost track of the stream, check alignment, and
+ * increment a single u64 in the hope to catch on again 'soon'.
+ */
+
+ if (unlikely(head & 7))
+ head &= ~7ULL;
+
+ size = 8;
+ }
+
+ head += size;
+
+ if (offset + head < stat.st_size)
+ goto more;
+
+ rc = EXIT_SUCCESS;
+ close(input);
+
+ dprintf(" IP events: %10ld\n", total);
+ dprintf(" mmap events: %10ld\n", total_mmap);
+ dprintf(" comm events: %10ld\n", total_comm);
+ dprintf(" fork events: %10ld\n", total_fork);
+ dprintf(" unknown events: %10ld\n", total_unknown);
+
+ if (dump_trace)
+ return 0;
+
+ if (verbose >= 3)
+ threads__fprintf(stdout);
+
+ if (verbose >= 2)
+ dsos__fprintf(stdout);
+
+ collapse__resort();
+ output__resort();
+
+ find_annotations();
+
+ return rc;
+}
+
+static const char * const annotate_usage[] = {
+ "perf annotate [<options>] <command>",
+ NULL
+};
+
+static const struct option options[] = {
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
+ OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
+ "symbol to annotate"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
+ OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
+ OPT_END()
+};
+
+static void setup_sorting(void)
+{
+ char *tmp, *tok, *str = strdup(sort_order);
+
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp)) {
+ if (sort_dimension__add(tok) < 0) {
+ error("Unknown --sort key: `%s'", tok);
+ usage_with_options(annotate_usage, options);
+ }
+ }
+
+ free(str);
+}
+
+int cmd_annotate(int argc, const char **argv, const char *prefix)
+{
+ symbol__init();
+
+ page_size = getpagesize();
+
+ argc = parse_options(argc, argv, options, annotate_usage, 0);
+
+ setup_sorting();
+
+ if (argc) {
+ /*
+ * Special case: if there's an argument left then assume tha
+ * it's a symbol filter:
+ */
+ if (argc > 1)
+ usage_with_options(annotate_usage, options);
+
+ sym_hist_filter = argv[0];
+ }
+
+ if (!sym_hist_filter)
+ usage_with_options(annotate_usage, options);
+
+ setup_pager();
+
+ return __cmd_annotate();
+}
--- /dev/null
+/*
+ * builtin-help.c
+ *
+ * Builtin help command
+ */
+#include "util/cache.h"
+#include "builtin.h"
+#include "util/exec_cmd.h"
+#include "common-cmds.h"
+#include "util/parse-options.h"
+#include "util/run-command.h"
+#include "util/help.h"
+
+static struct man_viewer_list {
+ struct man_viewer_list *next;
+ char name[FLEX_ARRAY];
+} *man_viewer_list;
+
+static struct man_viewer_info_list {
+ struct man_viewer_info_list *next;
+ const char *info;
+ char name[FLEX_ARRAY];
+} *man_viewer_info_list;
+
+enum help_format {
+ HELP_FORMAT_MAN,
+ HELP_FORMAT_INFO,
+ HELP_FORMAT_WEB,
+};
+
+static int show_all = 0;
+static enum help_format help_format = HELP_FORMAT_MAN;
+static struct option builtin_help_options[] = {
+ OPT_BOOLEAN('a', "all", &show_all, "print all available commands"),
+ OPT_SET_INT('m', "man", &help_format, "show man page", HELP_FORMAT_MAN),
+ OPT_SET_INT('w', "web", &help_format, "show manual in web browser",
+ HELP_FORMAT_WEB),
+ OPT_SET_INT('i', "info", &help_format, "show info page",
+ HELP_FORMAT_INFO),
+ OPT_END(),
+};
+
+static const char * const builtin_help_usage[] = {
+ "perf help [--all] [--man|--web|--info] [command]",
+ NULL
+};
+
+static enum help_format parse_help_format(const char *format)
+{
+ if (!strcmp(format, "man"))
+ return HELP_FORMAT_MAN;
+ if (!strcmp(format, "info"))
+ return HELP_FORMAT_INFO;
+ if (!strcmp(format, "web") || !strcmp(format, "html"))
+ return HELP_FORMAT_WEB;
+ die("unrecognized help format '%s'", format);
+}
+
+static const char *get_man_viewer_info(const char *name)
+{
+ struct man_viewer_info_list *viewer;
+
+ for (viewer = man_viewer_info_list; viewer; viewer = viewer->next)
+ {
+ if (!strcasecmp(name, viewer->name))
+ return viewer->info;
+ }
+ return NULL;
+}
+
+static int check_emacsclient_version(void)
+{
+ struct strbuf buffer = STRBUF_INIT;
+ struct child_process ec_process;
+ const char *argv_ec[] = { "emacsclient", "--version", NULL };
+ int version;
+
+ /* emacsclient prints its version number on stderr */
+ memset(&ec_process, 0, sizeof(ec_process));
+ ec_process.argv = argv_ec;
+ ec_process.err = -1;
+ ec_process.stdout_to_stderr = 1;
+ if (start_command(&ec_process)) {
+ fprintf(stderr, "Failed to start emacsclient.\n");
+ return -1;
+ }
+ strbuf_read(&buffer, ec_process.err, 20);
+ close(ec_process.err);
+
+ /*
+ * Don't bother checking return value, because "emacsclient --version"
+ * seems to always exits with code 1.
+ */
+ finish_command(&ec_process);
+
+ if (prefixcmp(buffer.buf, "emacsclient")) {
+ fprintf(stderr, "Failed to parse emacsclient version.\n");
+ strbuf_release(&buffer);
+ return -1;
+ }
+
+ strbuf_remove(&buffer, 0, strlen("emacsclient"));
+ version = atoi(buffer.buf);
+
+ if (version < 22) {
+ fprintf(stderr,
+ "emacsclient version '%d' too old (< 22).\n",
+ version);
+ strbuf_release(&buffer);
+ return -1;
+ }
+
+ strbuf_release(&buffer);
+ return 0;
+}
+
+static void exec_woman_emacs(const char* path, const char *page)
+{
+ if (!check_emacsclient_version()) {
+ /* This works only with emacsclient version >= 22. */
+ struct strbuf man_page = STRBUF_INIT;
+
+ if (!path)
+ path = "emacsclient";
+ strbuf_addf(&man_page, "(woman \"%s\")", page);
+ execlp(path, "emacsclient", "-e", man_page.buf, NULL);
+ warning("failed to exec '%s': %s", path, strerror(errno));
+ }
+}
+
+static void exec_man_konqueror(const char* path, const char *page)
+{
+ const char *display = getenv("DISPLAY");
+ if (display && *display) {
+ struct strbuf man_page = STRBUF_INIT;
+ const char *filename = "kfmclient";
+
+ /* It's simpler to launch konqueror using kfmclient. */
+ if (path) {
+ const char *file = strrchr(path, '/');
+ if (file && !strcmp(file + 1, "konqueror")) {
+ char *new = strdup(path);
+ char *dest = strrchr(new, '/');
+
+ /* strlen("konqueror") == strlen("kfmclient") */
+ strcpy(dest + 1, "kfmclient");
+ path = new;
+ }
+ if (file)
+ filename = file;
+ } else
+ path = "kfmclient";
+ strbuf_addf(&man_page, "man:%s(1)", page);
+ execlp(path, filename, "newTab", man_page.buf, NULL);
+ warning("failed to exec '%s': %s", path, strerror(errno));
+ }
+}
+
+static void exec_man_man(const char* path, const char *page)
+{
+ if (!path)
+ path = "man";
+ execlp(path, "man", page, NULL);
+ warning("failed to exec '%s': %s", path, strerror(errno));
+}
+
+static void exec_man_cmd(const char *cmd, const char *page)
+{
+ struct strbuf shell_cmd = STRBUF_INIT;
+ strbuf_addf(&shell_cmd, "%s %s", cmd, page);
+ execl("/bin/sh", "sh", "-c", shell_cmd.buf, NULL);
+ warning("failed to exec '%s': %s", cmd, strerror(errno));
+}
+
+static void add_man_viewer(const char *name)
+{
+ struct man_viewer_list **p = &man_viewer_list;
+ size_t len = strlen(name);
+
+ while (*p)
+ p = &((*p)->next);
+ *p = calloc(1, (sizeof(**p) + len + 1));
+ strncpy((*p)->name, name, len);
+}
+
+static int supported_man_viewer(const char *name, size_t len)
+{
+ return (!strncasecmp("man", name, len) ||
+ !strncasecmp("woman", name, len) ||
+ !strncasecmp("konqueror", name, len));
+}
+
+static void do_add_man_viewer_info(const char *name,
+ size_t len,
+ const char *value)
+{
+ struct man_viewer_info_list *new = calloc(1, sizeof(*new) + len + 1);
+
+ strncpy(new->name, name, len);
+ new->info = strdup(value);
+ new->next = man_viewer_info_list;
+ man_viewer_info_list = new;
+}
+
+static int add_man_viewer_path(const char *name,
+ size_t len,
+ const char *value)
+{
+ if (supported_man_viewer(name, len))
+ do_add_man_viewer_info(name, len, value);
+ else
+ warning("'%s': path for unsupported man viewer.\n"
+ "Please consider using 'man.<tool>.cmd' instead.",
+ name);
+
+ return 0;
+}
+
+static int add_man_viewer_cmd(const char *name,
+ size_t len,
+ const char *value)
+{
+ if (supported_man_viewer(name, len))
+ warning("'%s': cmd for supported man viewer.\n"
+ "Please consider using 'man.<tool>.path' instead.",
+ name);
+ else
+ do_add_man_viewer_info(name, len, value);
+
+ return 0;
+}
+
+static int add_man_viewer_info(const char *var, const char *value)
+{
+ const char *name = var + 4;
+ const char *subkey = strrchr(name, '.');
+
+ if (!subkey)
+ return error("Config with no key for man viewer: %s", name);
+
+ if (!strcmp(subkey, ".path")) {
+ if (!value)
+ return config_error_nonbool(var);
+ return add_man_viewer_path(name, subkey - name, value);
+ }
+ if (!strcmp(subkey, ".cmd")) {
+ if (!value)
+ return config_error_nonbool(var);
+ return add_man_viewer_cmd(name, subkey - name, value);
+ }
+
+ warning("'%s': unsupported man viewer sub key.", subkey);
+ return 0;
+}
+
+static int perf_help_config(const char *var, const char *value, void *cb)
+{
+ if (!strcmp(var, "help.format")) {
+ if (!value)
+ return config_error_nonbool(var);
+ help_format = parse_help_format(value);
+ return 0;
+ }
+ if (!strcmp(var, "man.viewer")) {
+ if (!value)
+ return config_error_nonbool(var);
+ add_man_viewer(value);
+ return 0;
+ }
+ if (!prefixcmp(var, "man."))
+ return add_man_viewer_info(var, value);
+
+ return perf_default_config(var, value, cb);
+}
+
+static struct cmdnames main_cmds, other_cmds;
+
+void list_common_cmds_help(void)
+{
+ int i, longest = 0;
+
+ for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
+ if (longest < strlen(common_cmds[i].name))
+ longest = strlen(common_cmds[i].name);
+ }
+
+ puts(" The most commonly used perf commands are:");
+ for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
+ printf(" %s ", common_cmds[i].name);
+ mput_char(' ', longest - strlen(common_cmds[i].name));
+ puts(common_cmds[i].help);
+ }
+}
+
+static int is_perf_command(const char *s)
+{
+ return is_in_cmdlist(&main_cmds, s) ||
+ is_in_cmdlist(&other_cmds, s);
+}
+
+static const char *prepend(const char *prefix, const char *cmd)
+{
+ size_t pre_len = strlen(prefix);
+ size_t cmd_len = strlen(cmd);
+ char *p = malloc(pre_len + cmd_len + 1);
+ memcpy(p, prefix, pre_len);
+ strcpy(p + pre_len, cmd);
+ return p;
+}
+
+static const char *cmd_to_page(const char *perf_cmd)
+{
+ if (!perf_cmd)
+ return "perf";
+ else if (!prefixcmp(perf_cmd, "perf"))
+ return perf_cmd;
+ else if (is_perf_command(perf_cmd))
+ return prepend("perf-", perf_cmd);
+ else
+ return prepend("perf-", perf_cmd);
+}
+
+static void setup_man_path(void)
+{
+ struct strbuf new_path = STRBUF_INIT;
+ const char *old_path = getenv("MANPATH");
+
+ /* We should always put ':' after our path. If there is no
+ * old_path, the ':' at the end will let 'man' to try
+ * system-wide paths after ours to find the manual page. If
+ * there is old_path, we need ':' as delimiter. */
+ strbuf_addstr(&new_path, system_path(PERF_MAN_PATH));
+ strbuf_addch(&new_path, ':');
+ if (old_path)
+ strbuf_addstr(&new_path, old_path);
+
+ setenv("MANPATH", new_path.buf, 1);
+
+ strbuf_release(&new_path);
+}
+
+static void exec_viewer(const char *name, const char *page)
+{
+ const char *info = get_man_viewer_info(name);
+
+ if (!strcasecmp(name, "man"))
+ exec_man_man(info, page);
+ else if (!strcasecmp(name, "woman"))
+ exec_woman_emacs(info, page);
+ else if (!strcasecmp(name, "konqueror"))
+ exec_man_konqueror(info, page);
+ else if (info)
+ exec_man_cmd(info, page);
+ else
+ warning("'%s': unknown man viewer.", name);
+}
+
+static void show_man_page(const char *perf_cmd)
+{
+ struct man_viewer_list *viewer;
+ const char *page = cmd_to_page(perf_cmd);
+ const char *fallback = getenv("PERF_MAN_VIEWER");
+
+ setup_man_path();
+ for (viewer = man_viewer_list; viewer; viewer = viewer->next)
+ {
+ exec_viewer(viewer->name, page); /* will return when unable */
+ }
+ if (fallback)
+ exec_viewer(fallback, page);
+ exec_viewer("man", page);
+ die("no man viewer handled the request");
+}
+
+static void show_info_page(const char *perf_cmd)
+{
+ const char *page = cmd_to_page(perf_cmd);
+ setenv("INFOPATH", system_path(PERF_INFO_PATH), 1);
+ execlp("info", "info", "perfman", page, NULL);
+}
+
+static void get_html_page_path(struct strbuf *page_path, const char *page)
+{
+ struct stat st;
+ const char *html_path = system_path(PERF_HTML_PATH);
+
+ /* Check that we have a perf documentation directory. */
+ if (stat(mkpath("%s/perf.html", html_path), &st)
+ || !S_ISREG(st.st_mode))
+ die("'%s': not a documentation directory.", html_path);
+
+ strbuf_init(page_path, 0);
+ strbuf_addf(page_path, "%s/%s.html", html_path, page);
+}
+
+/*
+ * If open_html is not defined in a platform-specific way (see for
+ * example compat/mingw.h), we use the script web--browse to display
+ * HTML.
+ */
+#ifndef open_html
+static void open_html(const char *path)
+{
+ execl_perf_cmd("web--browse", "-c", "help.browser", path, NULL);
+}
+#endif
+
+static void show_html_page(const char *perf_cmd)
+{
+ const char *page = cmd_to_page(perf_cmd);
+ struct strbuf page_path; /* it leaks but we exec bellow */
+
+ get_html_page_path(&page_path, page);
+
+ open_html(page_path.buf);
+}
+
+int cmd_help(int argc, const char **argv, const char *prefix)
+{
+ const char *alias;
+ load_command_list("perf-", &main_cmds, &other_cmds);
+
+ perf_config(perf_help_config, NULL);
+
+ argc = parse_options(argc, argv, builtin_help_options,
+ builtin_help_usage, 0);
+
+ if (show_all) {
+ printf("\n usage: %s\n\n", perf_usage_string);
+ list_commands("perf commands", &main_cmds, &other_cmds);
+ printf(" %s\n\n", perf_more_info_string);
+ return 0;
+ }
+
+ if (!argv[0]) {
+ printf("\n usage: %s\n\n", perf_usage_string);
+ list_common_cmds_help();
+ printf("\n %s\n\n", perf_more_info_string);
+ return 0;
+ }
+
+ alias = alias_lookup(argv[0]);
+ if (alias && !is_perf_command(argv[0])) {
+ printf("`perf %s' is aliased to `%s'\n", argv[0], alias);
+ return 0;
+ }
+
+ switch (help_format) {
+ case HELP_FORMAT_MAN:
+ show_man_page(argv[0]);
+ break;
+ case HELP_FORMAT_INFO:
+ show_info_page(argv[0]);
+ break;
+ case HELP_FORMAT_WEB:
+ show_html_page(argv[0]);
+ break;
+ }
+
+ return 0;
+}
--- /dev/null
+/*
+ * builtin-list.c
+ *
+ * Builtin list command: list all event types
+ *
+ * Copyright (C) 2009, Thomas Gleixner <tglx@linutronix.de>
+ * Copyright (C) 2008-2009, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ */
+#include "builtin.h"
+
+#include "perf.h"
+
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+
+int cmd_list(int argc, const char **argv, const char *prefix)
+{
+ print_events();
+ return 0;
+}
--- /dev/null
+/*
+ * builtin-record.c
+ *
+ * Builtin record command: Record the profile of a workload
+ * (or a CPU, or a PID) into the perf.data output file - for
+ * later analysis via perf report.
+ */
+#include "builtin.h"
+
+#include "perf.h"
+
+#include "util/util.h"
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+#include "util/string.h"
+
+#include <unistd.h>
+#include <sched.h>
+
+#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1)
+#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
+
+static int fd[MAX_NR_CPUS][MAX_COUNTERS];
+
+static long default_interval = 100000;
+
+static int nr_cpus = 0;
+static unsigned int page_size;
+static unsigned int mmap_pages = 128;
+static int freq = 0;
+static int output;
+static const char *output_name = "perf.data";
+static int group = 0;
+static unsigned int realtime_prio = 0;
+static int system_wide = 0;
+static pid_t target_pid = -1;
+static int inherit = 1;
+static int force = 0;
+static int append_file = 0;
+static int verbose = 0;
+
+static long samples;
+static struct timeval last_read;
+static struct timeval this_read;
+
+static __u64 bytes_written;
+
+static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS];
+
+static int nr_poll;
+static int nr_cpu;
+
+struct mmap_event {
+ struct perf_event_header header;
+ __u32 pid;
+ __u32 tid;
+ __u64 start;
+ __u64 len;
+ __u64 pgoff;
+ char filename[PATH_MAX];
+};
+
+struct comm_event {
+ struct perf_event_header header;
+ __u32 pid;
+ __u32 tid;
+ char comm[16];
+};
+
+
+struct mmap_data {
+ int counter;
+ void *base;
+ unsigned int mask;
+ unsigned int prev;
+};
+
+static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
+
+static unsigned int mmap_read_head(struct mmap_data *md)
+{
+ struct perf_counter_mmap_page *pc = md->base;
+ int head;
+
+ head = pc->data_head;
+ rmb();
+
+ return head;
+}
+
+static void mmap_read(struct mmap_data *md)
+{
+ unsigned int head = mmap_read_head(md);
+ unsigned int old = md->prev;
+ unsigned char *data = md->base + page_size;
+ unsigned long size;
+ void *buf;
+ int diff;
+
+ gettimeofday(&this_read, NULL);
+
+ /*
+ * If we're further behind than half the buffer, there's a chance
+ * the writer will bite our tail and mess up the samples under us.
+ *
+ * If we somehow ended up ahead of the head, we got messed up.
+ *
+ * In either case, truncate and restart at head.
+ */
+ diff = head - old;
+ if (diff > md->mask / 2 || diff < 0) {
+ struct timeval iv;
+ unsigned long msecs;
+
+ timersub(&this_read, &last_read, &iv);
+ msecs = iv.tv_sec*1000 + iv.tv_usec/1000;
+
+ fprintf(stderr, "WARNING: failed to keep up with mmap data."
+ " Last read %lu msecs ago.\n", msecs);
+
+ /*
+ * head points to a known good entry, start there.
+ */
+ old = head;
+ }
+
+ last_read = this_read;
+
+ if (old != head)
+ samples++;
+
+ size = head - old;
+
+ if ((old & md->mask) + size != (head & md->mask)) {
+ buf = &data[old & md->mask];
+ size = md->mask + 1 - (old & md->mask);
+ old += size;
+
+ while (size) {
+ int ret = write(output, buf, size);
+
+ if (ret < 0)
+ die("failed to write");
+
+ size -= ret;
+ buf += ret;
+
+ bytes_written += ret;
+ }
+ }
+
+ buf = &data[old & md->mask];
+ size = head - old;
+ old += size;
+
+ while (size) {
+ int ret = write(output, buf, size);
+
+ if (ret < 0)
+ die("failed to write");
+
+ size -= ret;
+ buf += ret;
+
+ bytes_written += ret;
+ }
+
+ md->prev = old;
+}
+
+static volatile int done = 0;
+static volatile int signr = -1;
+
+static void sig_handler(int sig)
+{
+ done = 1;
+ signr = sig;
+}
+
+static void sig_atexit(void)
+{
+ if (signr == -1)
+ return;
+
+ signal(signr, SIG_DFL);
+ kill(getpid(), signr);
+}
+
+static void pid_synthesize_comm_event(pid_t pid, int full)
+{
+ struct comm_event comm_ev;
+ char filename[PATH_MAX];
+ char bf[BUFSIZ];
+ int fd, ret;
+ size_t size;
+ char *field, *sep;
+ DIR *tasks;
+ struct dirent dirent, *next;
+
+ snprintf(filename, sizeof(filename), "/proc/%d/stat", pid);
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "couldn't open %s\n", filename);
+ exit(EXIT_FAILURE);
+ }
+ if (read(fd, bf, sizeof(bf)) < 0) {
+ fprintf(stderr, "couldn't read %s\n", filename);
+ exit(EXIT_FAILURE);
+ }
+ close(fd);
+
+ /* 9027 (cat) R 6747 9027 6747 34816 9027 ... */
+ memset(&comm_ev, 0, sizeof(comm_ev));
+ field = strchr(bf, '(');
+ if (field == NULL)
+ goto out_failure;
+ sep = strchr(++field, ')');
+ if (sep == NULL)
+ goto out_failure;
+ size = sep - field;
+ memcpy(comm_ev.comm, field, size++);
+
+ comm_ev.pid = pid;
+ comm_ev.header.type = PERF_EVENT_COMM;
+ size = ALIGN(size, sizeof(__u64));
+ comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size);
+
+ if (!full) {
+ comm_ev.tid = pid;
+
+ ret = write(output, &comm_ev, comm_ev.header.size);
+ if (ret < 0) {
+ perror("failed to write");
+ exit(-1);
+ }
+ return;
+ }
+
+ snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
+
+ tasks = opendir(filename);
+ while (!readdir_r(tasks, &dirent, &next) && next) {
+ char *end;
+ pid = strtol(dirent.d_name, &end, 10);
+ if (*end)
+ continue;
+
+ comm_ev.tid = pid;
+
+ ret = write(output, &comm_ev, comm_ev.header.size);
+ if (ret < 0) {
+ perror("failed to write");
+ exit(-1);
+ }
+ }
+ closedir(tasks);
+ return;
+
+out_failure:
+ fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n",
+ filename);
+ exit(EXIT_FAILURE);
+}
+
+static void pid_synthesize_mmap_samples(pid_t pid)
+{
+ char filename[PATH_MAX];
+ FILE *fp;
+
+ snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
+
+ fp = fopen(filename, "r");
+ if (fp == NULL) {
+ fprintf(stderr, "couldn't open %s\n", filename);
+ exit(EXIT_FAILURE);
+ }
+ while (1) {
+ char bf[BUFSIZ], *pbf = bf;
+ struct mmap_event mmap_ev = {
+ .header.type = PERF_EVENT_MMAP,
+ };
+ int n;
+ size_t size;
+ if (fgets(bf, sizeof(bf), fp) == NULL)
+ break;
+
+ /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
+ n = hex2u64(pbf, &mmap_ev.start);
+ if (n < 0)
+ continue;
+ pbf += n + 1;
+ n = hex2u64(pbf, &mmap_ev.len);
+ if (n < 0)
+ continue;
+ pbf += n + 3;
+ if (*pbf == 'x') { /* vm_exec */
+ char *execname = strrchr(bf, ' ');
+
+ if (execname == NULL || execname[1] != '/')
+ continue;
+
+ execname += 1;
+ size = strlen(execname);
+ execname[size - 1] = '\0'; /* Remove \n */
+ memcpy(mmap_ev.filename, execname, size);
+ size = ALIGN(size, sizeof(__u64));
+ mmap_ev.len -= mmap_ev.start;
+ mmap_ev.header.size = (sizeof(mmap_ev) -
+ (sizeof(mmap_ev.filename) - size));
+ mmap_ev.pid = pid;
+ mmap_ev.tid = pid;
+
+ if (write(output, &mmap_ev, mmap_ev.header.size) < 0) {
+ perror("failed to write");
+ exit(-1);
+ }
+ }
+ }
+
+ fclose(fp);
+}
+
+static void synthesize_samples(void)
+{
+ DIR *proc;
+ struct dirent dirent, *next;
+
+ proc = opendir("/proc");
+
+ while (!readdir_r(proc, &dirent, &next) && next) {
+ char *end;
+ pid_t pid;
+
+ pid = strtol(dirent.d_name, &end, 10);
+ if (*end) /* only interested in proper numerical dirents */
+ continue;
+
+ pid_synthesize_comm_event(pid, 1);
+ pid_synthesize_mmap_samples(pid);
+ }
+
+ closedir(proc);
+}
+
+static int group_fd;
+
+static void create_counter(int counter, int cpu, pid_t pid)
+{
+ struct perf_counter_attr *attr = attrs + counter;
+ int track = 1;
+
+ attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
+ if (freq) {
+ attr->sample_type |= PERF_SAMPLE_PERIOD;
+ attr->freq = 1;
+ attr->sample_freq = freq;
+ }
+ attr->mmap = track;
+ attr->comm = track;
+ attr->inherit = (cpu < 0) && inherit;
+ attr->disabled = 1;
+
+ track = 0; /* only the first counter needs these */
+
+try_again:
+ fd[nr_cpu][counter] = sys_perf_counter_open(attr, pid, cpu, group_fd, 0);
+
+ if (fd[nr_cpu][counter] < 0) {
+ int err = errno;
+
+ if (err == EPERM)
+ die("Permission error - are you root?\n");
+
+ /*
+ * If it's cycles then fall back to hrtimer
+ * based cpu-clock-tick sw counter, which
+ * is always available even if no PMU support:
+ */
+ if (attr->type == PERF_TYPE_HARDWARE
+ && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
+
+ if (verbose)
+ warning(" ... trying to fall back to cpu-clock-ticks\n");
+ attr->type = PERF_TYPE_SOFTWARE;
+ attr->config = PERF_COUNT_SW_CPU_CLOCK;
+ goto try_again;
+ }
+ printf("\n");
+ error("perfcounter syscall returned with %d (%s)\n",
+ fd[nr_cpu][counter], strerror(err));
+ die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n");
+ exit(-1);
+ }
+
+ assert(fd[nr_cpu][counter] >= 0);
+ fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK);
+
+ /*
+ * First counter acts as the group leader:
+ */
+ if (group && group_fd == -1)
+ group_fd = fd[nr_cpu][counter];
+
+ event_array[nr_poll].fd = fd[nr_cpu][counter];
+ event_array[nr_poll].events = POLLIN;
+ nr_poll++;
+
+ mmap_array[nr_cpu][counter].counter = counter;
+ mmap_array[nr_cpu][counter].prev = 0;
+ mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1;
+ mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size,
+ PROT_READ, MAP_SHARED, fd[nr_cpu][counter], 0);
+ if (mmap_array[nr_cpu][counter].base == MAP_FAILED) {
+ error("failed to mmap with %d (%s)\n", errno, strerror(errno));
+ exit(-1);
+ }
+
+ ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_ENABLE);
+}
+
+static void open_counters(int cpu, pid_t pid)
+{
+ int counter;
+
+ if (pid > 0) {
+ pid_synthesize_comm_event(pid, 0);
+ pid_synthesize_mmap_samples(pid);
+ }
+
+ group_fd = -1;
+ for (counter = 0; counter < nr_counters; counter++)
+ create_counter(counter, cpu, pid);
+
+ nr_cpu++;
+}
+
+static int __cmd_record(int argc, const char **argv)
+{
+ int i, counter;
+ struct stat st;
+ pid_t pid;
+ int flags;
+ int ret;
+
+ page_size = sysconf(_SC_PAGE_SIZE);
+ nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ assert(nr_cpus <= MAX_NR_CPUS);
+ assert(nr_cpus >= 0);
+
+ if (!stat(output_name, &st) && !force && !append_file) {
+ fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n",
+ output_name);
+ exit(-1);
+ }
+
+ flags = O_CREAT|O_RDWR;
+ if (append_file)
+ flags |= O_APPEND;
+ else
+ flags |= O_TRUNC;
+
+ output = open(output_name, flags, S_IRUSR|S_IWUSR);
+ if (output < 0) {
+ perror("failed to create output file");
+ exit(-1);
+ }
+
+ if (!system_wide) {
+ open_counters(-1, target_pid != -1 ? target_pid : getpid());
+ } else for (i = 0; i < nr_cpus; i++)
+ open_counters(i, target_pid);
+
+ atexit(sig_atexit);
+ signal(SIGCHLD, sig_handler);
+ signal(SIGINT, sig_handler);
+
+ if (target_pid == -1 && argc) {
+ pid = fork();
+ if (pid < 0)
+ perror("failed to fork");
+
+ if (!pid) {
+ if (execvp(argv[0], (char **)argv)) {
+ perror(argv[0]);
+ exit(-1);
+ }
+ }
+ }
+
+ if (realtime_prio) {
+ struct sched_param param;
+
+ param.sched_priority = realtime_prio;
+ if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
+ printf("Could not set realtime priority.\n");
+ exit(-1);
+ }
+ }
+
+ if (system_wide)
+ synthesize_samples();
+
+ while (!done) {
+ int hits = samples;
+
+ for (i = 0; i < nr_cpu; i++) {
+ for (counter = 0; counter < nr_counters; counter++)
+ mmap_read(&mmap_array[i][counter]);
+ }
+
+ if (hits == samples)
+ ret = poll(event_array, nr_poll, 100);
+ }
+
+ /*
+ * Approximate RIP event size: 24 bytes.
+ */
+ fprintf(stderr,
+ "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n",
+ (double)bytes_written / 1024.0 / 1024.0,
+ output_name,
+ bytes_written / 24);
+
+ return 0;
+}
+
+static const char * const record_usage[] = {
+ "perf record [<options>] [<command>]",
+ "perf record [<options>] -- <command> [<options>]",
+ NULL
+};
+
+static const struct option options[] = {
+ OPT_CALLBACK('e', "event", NULL, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events),
+ OPT_INTEGER('p', "pid", &target_pid,
+ "record events on existing pid"),
+ OPT_INTEGER('r', "realtime", &realtime_prio,
+ "collect data with this RT SCHED_FIFO priority"),
+ OPT_BOOLEAN('a', "all-cpus", &system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_BOOLEAN('A', "append", &append_file,
+ "append to the output file to do incremental profiling"),
+ OPT_BOOLEAN('f', "force", &force,
+ "overwrite existing data file"),
+ OPT_LONG('c', "count", &default_interval,
+ "event period to sample"),
+ OPT_STRING('o', "output", &output_name, "file",
+ "output file name"),
+ OPT_BOOLEAN('i', "inherit", &inherit,
+ "child tasks inherit counters"),
+ OPT_INTEGER('F', "freq", &freq,
+ "profile at this frequency"),
+ OPT_INTEGER('m', "mmap-pages", &mmap_pages,
+ "number of mmap data pages"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_END()
+};
+
+int cmd_record(int argc, const char **argv, const char *prefix)
+{
+ int counter;
+
+ argc = parse_options(argc, argv, options, record_usage, 0);
+ if (!argc && target_pid == -1 && !system_wide)
+ usage_with_options(record_usage, options);
+
+ if (!nr_counters)
+ nr_counters = 1;
+
+ for (counter = 0; counter < nr_counters; counter++) {
+ if (attrs[counter].sample_period)
+ continue;
+
+ attrs[counter].sample_period = default_interval;
+ }
+
+ return __cmd_record(argc, argv);
+}
--- /dev/null
+/*
+ * builtin-report.c
+ *
+ * Builtin report command: Analyze the perf.data input file,
+ * look up and read DSOs and symbol information and display
+ * a histogram of results, along various sorting keys.
+ */
+#include "builtin.h"
+
+#include "util/util.h"
+
+#include "util/color.h"
+#include "util/list.h"
+#include "util/cache.h"
+#include "util/rbtree.h"
+#include "util/symbol.h"
+#include "util/string.h"
+
+#include "perf.h"
+
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+
+#define SHOW_KERNEL 1
+#define SHOW_USER 2
+#define SHOW_HV 4
+
+static char const *input_name = "perf.data";
+static char *vmlinux = NULL;
+
+static char default_sort_order[] = "comm,dso";
+static char *sort_order = default_sort_order;
+
+static int input;
+static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
+
+static int dump_trace = 0;
+#define dprintf(x...) do { if (dump_trace) printf(x); } while (0)
+
+static int verbose;
+static int full_paths;
+
+static unsigned long page_size;
+static unsigned long mmap_window = 32;
+
+struct ip_event {
+ struct perf_event_header header;
+ __u64 ip;
+ __u32 pid, tid;
+ __u64 period;
+};
+
+struct mmap_event {
+ struct perf_event_header header;
+ __u32 pid, tid;
+ __u64 start;
+ __u64 len;
+ __u64 pgoff;
+ char filename[PATH_MAX];
+};
+
+struct comm_event {
+ struct perf_event_header header;
+ __u32 pid, tid;
+ char comm[16];
+};
+
+struct fork_event {
+ struct perf_event_header header;
+ __u32 pid, ppid;
+};
+
+struct period_event {
+ struct perf_event_header header;
+ __u64 time;
+ __u64 id;
+ __u64 sample_period;
+};
+
+typedef union event_union {
+ struct perf_event_header header;
+ struct ip_event ip;
+ struct mmap_event mmap;
+ struct comm_event comm;
+ struct fork_event fork;
+ struct period_event period;
+} event_t;
+
+static LIST_HEAD(dsos);
+static struct dso *kernel_dso;
+static struct dso *vdso;
+
+static void dsos__add(struct dso *dso)
+{
+ list_add_tail(&dso->node, &dsos);
+}
+
+static struct dso *dsos__find(const char *name)
+{
+ struct dso *pos;
+
+ list_for_each_entry(pos, &dsos, node)
+ if (strcmp(pos->name, name) == 0)
+ return pos;
+ return NULL;
+}
+
+static struct dso *dsos__findnew(const char *name)
+{
+ struct dso *dso = dsos__find(name);
+ int nr;
+
+ if (dso)
+ return dso;
+
+ dso = dso__new(name, 0);
+ if (!dso)
+ goto out_delete_dso;
+
+ nr = dso__load(dso, NULL, verbose);
+ if (nr < 0) {
+ if (verbose)
+ fprintf(stderr, "Failed to open: %s\n", name);
+ goto out_delete_dso;
+ }
+ if (!nr && verbose) {
+ fprintf(stderr,
+ "No symbols found in: %s, maybe install a debug package?\n",
+ name);
+ }
+
+ dsos__add(dso);
+
+ return dso;
+
+out_delete_dso:
+ dso__delete(dso);
+ return NULL;
+}
+
+static void dsos__fprintf(FILE *fp)
+{
+ struct dso *pos;
+
+ list_for_each_entry(pos, &dsos, node)
+ dso__fprintf(pos, fp);
+}
+
+static struct symbol *vdso__find_symbol(struct dso *dso, __u64 ip)
+{
+ return dso__find_symbol(kernel_dso, ip);
+}
+
+static int load_kernel(void)
+{
+ int err;
+
+ kernel_dso = dso__new("[kernel]", 0);
+ if (!kernel_dso)
+ return -1;
+
+ err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
+ if (err) {
+ dso__delete(kernel_dso);
+ kernel_dso = NULL;
+ } else
+ dsos__add(kernel_dso);
+
+ vdso = dso__new("[vdso]", 0);
+ if (!vdso)
+ return -1;
+
+ vdso->find_symbol = vdso__find_symbol;
+
+ dsos__add(vdso);
+
+ return err;
+}
+
+static char __cwd[PATH_MAX];
+static char *cwd = __cwd;
+static int cwdlen;
+
+static int strcommon(const char *pathname)
+{
+ int n = 0;
+
+ while (pathname[n] == cwd[n] && n < cwdlen)
+ ++n;
+
+ return n;
+}
+
+struct map {
+ struct list_head node;
+ __u64 start;
+ __u64 end;
+ __u64 pgoff;
+ __u64 (*map_ip)(struct map *, __u64);
+ struct dso *dso;
+};
+
+static __u64 map__map_ip(struct map *map, __u64 ip)
+{
+ return ip - map->start + map->pgoff;
+}
+
+static __u64 vdso__map_ip(struct map *map, __u64 ip)
+{
+ return ip;
+}
+
+static inline int is_anon_memory(const char *filename)
+{
+ return strcmp(filename, "//anon") == 0;
+}
+
+static struct map *map__new(struct mmap_event *event)
+{
+ struct map *self = malloc(sizeof(*self));
+
+ if (self != NULL) {
+ const char *filename = event->filename;
+ char newfilename[PATH_MAX];
+ int anon;
+
+ if (cwd) {
+ int n = strcommon(filename);
+
+ if (n == cwdlen) {
+ snprintf(newfilename, sizeof(newfilename),
+ ".%s", filename + n);
+ filename = newfilename;
+ }
+ }
+
+ anon = is_anon_memory(filename);
+
+ if (anon) {
+ snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
+ filename = newfilename;
+ }
+
+ self->start = event->start;
+ self->end = event->start + event->len;
+ self->pgoff = event->pgoff;
+
+ self->dso = dsos__findnew(filename);
+ if (self->dso == NULL)
+ goto out_delete;
+
+ if (self->dso == vdso || anon)
+ self->map_ip = vdso__map_ip;
+ else
+ self->map_ip = map__map_ip;
+ }
+ return self;
+out_delete:
+ free(self);
+ return NULL;
+}
+
+static struct map *map__clone(struct map *self)
+{
+ struct map *map = malloc(sizeof(*self));
+
+ if (!map)
+ return NULL;
+
+ memcpy(map, self, sizeof(*self));
+
+ return map;
+}
+
+static int map__overlap(struct map *l, struct map *r)
+{
+ if (l->start > r->start) {
+ struct map *t = l;
+ l = r;
+ r = t;
+ }
+
+ if (l->end > r->start)
+ return 1;
+
+ return 0;
+}
+
+static size_t map__fprintf(struct map *self, FILE *fp)
+{
+ return fprintf(fp, " %Lx-%Lx %Lx %s\n",
+ self->start, self->end, self->pgoff, self->dso->name);
+}
+
+
+struct thread {
+ struct rb_node rb_node;
+ struct list_head maps;
+ pid_t pid;
+ char *comm;
+};
+
+static struct thread *thread__new(pid_t pid)
+{
+ struct thread *self = malloc(sizeof(*self));
+
+ if (self != NULL) {
+ self->pid = pid;
+ self->comm = malloc(32);
+ if (self->comm)
+ snprintf(self->comm, 32, ":%d", self->pid);
+ INIT_LIST_HEAD(&self->maps);
+ }
+
+ return self;
+}
+
+static int thread__set_comm(struct thread *self, const char *comm)
+{
+ if (self->comm)
+ free(self->comm);
+ self->comm = strdup(comm);
+ return self->comm ? 0 : -ENOMEM;
+}
+
+static size_t thread__fprintf(struct thread *self, FILE *fp)
+{
+ struct map *pos;
+ size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
+
+ list_for_each_entry(pos, &self->maps, node)
+ ret += map__fprintf(pos, fp);
+
+ return ret;
+}
+
+
+static struct rb_root threads;
+static struct thread *last_match;
+
+static struct thread *threads__findnew(pid_t pid)
+{
+ struct rb_node **p = &threads.rb_node;
+ struct rb_node *parent = NULL;
+ struct thread *th;
+
+ /*
+ * Font-end cache - PID lookups come in blocks,
+ * so most of the time we dont have to look up
+ * the full rbtree:
+ */
+ if (last_match && last_match->pid == pid)
+ return last_match;
+
+ while (*p != NULL) {
+ parent = *p;
+ th = rb_entry(parent, struct thread, rb_node);
+
+ if (th->pid == pid) {
+ last_match = th;
+ return th;
+ }
+
+ if (pid < th->pid)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ th = thread__new(pid);
+ if (th != NULL) {
+ rb_link_node(&th->rb_node, parent, p);
+ rb_insert_color(&th->rb_node, &threads);
+ last_match = th;
+ }
+
+ return th;
+}
+
+static void thread__insert_map(struct thread *self, struct map *map)
+{
+ struct map *pos, *tmp;
+
+ list_for_each_entry_safe(pos, tmp, &self->maps, node) {
+ if (map__overlap(pos, map)) {
+ list_del_init(&pos->node);
+ /* XXX leaks dsos */
+ free(pos);
+ }
+ }
+
+ list_add_tail(&map->node, &self->maps);
+}
+
+static int thread__fork(struct thread *self, struct thread *parent)
+{
+ struct map *map;
+
+ if (self->comm)
+ free(self->comm);
+ self->comm = strdup(parent->comm);
+ if (!self->comm)
+ return -ENOMEM;
+
+ list_for_each_entry(map, &parent->maps, node) {
+ struct map *new = map__clone(map);
+ if (!new)
+ return -ENOMEM;
+ thread__insert_map(self, new);
+ }
+
+ return 0;
+}
+
+static struct map *thread__find_map(struct thread *self, __u64 ip)
+{
+ struct map *pos;
+
+ if (self == NULL)
+ return NULL;
+
+ list_for_each_entry(pos, &self->maps, node)
+ if (ip >= pos->start && ip <= pos->end)
+ return pos;
+
+ return NULL;
+}
+
+static size_t threads__fprintf(FILE *fp)
+{
+ size_t ret = 0;
+ struct rb_node *nd;
+
+ for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
+ struct thread *pos = rb_entry(nd, struct thread, rb_node);
+
+ ret += thread__fprintf(pos, fp);
+ }
+
+ return ret;
+}
+
+/*
+ * histogram, sorted on item, collects counts
+ */
+
+static struct rb_root hist;
+
+struct hist_entry {
+ struct rb_node rb_node;
+
+ struct thread *thread;
+ struct map *map;
+ struct dso *dso;
+ struct symbol *sym;
+ __u64 ip;
+ char level;
+
+ __u64 count;
+};
+
+/*
+ * configurable sorting bits
+ */
+
+struct sort_entry {
+ struct list_head list;
+
+ char *header;
+
+ int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
+ int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
+ size_t (*print)(FILE *fp, struct hist_entry *);
+};
+
+/* --sort pid */
+
+static int64_t
+sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return right->thread->pid - left->thread->pid;
+}
+
+static size_t
+sort__thread_print(FILE *fp, struct hist_entry *self)
+{
+ return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
+}
+
+static struct sort_entry sort_thread = {
+ .header = " Command: Pid",
+ .cmp = sort__thread_cmp,
+ .print = sort__thread_print,
+};
+
+/* --sort comm */
+
+static int64_t
+sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return right->thread->pid - left->thread->pid;
+}
+
+static int64_t
+sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
+{
+ char *comm_l = left->thread->comm;
+ char *comm_r = right->thread->comm;
+
+ if (!comm_l || !comm_r) {
+ if (!comm_l && !comm_r)
+ return 0;
+ else if (!comm_l)
+ return -1;
+ else
+ return 1;
+ }
+
+ return strcmp(comm_l, comm_r);
+}
+
+static size_t
+sort__comm_print(FILE *fp, struct hist_entry *self)
+{
+ return fprintf(fp, "%16s", self->thread->comm);
+}
+
+static struct sort_entry sort_comm = {
+ .header = " Command",
+ .cmp = sort__comm_cmp,
+ .collapse = sort__comm_collapse,
+ .print = sort__comm_print,
+};
+
+/* --sort dso */
+
+static int64_t
+sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ struct dso *dso_l = left->dso;
+ struct dso *dso_r = right->dso;
+
+ if (!dso_l || !dso_r) {
+ if (!dso_l && !dso_r)
+ return 0;
+ else if (!dso_l)
+ return -1;
+ else
+ return 1;
+ }
+
+ return strcmp(dso_l->name, dso_r->name);
+}
+
+static size_t
+sort__dso_print(FILE *fp, struct hist_entry *self)
+{
+ if (self->dso)
+ return fprintf(fp, "%-25s", self->dso->name);
+
+ return fprintf(fp, "%016llx ", (__u64)self->ip);
+}
+
+static struct sort_entry sort_dso = {
+ .header = "Shared Object ",
+ .cmp = sort__dso_cmp,
+ .print = sort__dso_print,
+};
+
+/* --sort symbol */
+
+static int64_t
+sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ __u64 ip_l, ip_r;
+
+ if (left->sym == right->sym)
+ return 0;
+
+ ip_l = left->sym ? left->sym->start : left->ip;
+ ip_r = right->sym ? right->sym->start : right->ip;
+
+ return (int64_t)(ip_r - ip_l);
+}
+
+static size_t
+sort__sym_print(FILE *fp, struct hist_entry *self)
+{
+ size_t ret = 0;
+
+ if (verbose)
+ ret += fprintf(fp, "%#018llx ", (__u64)self->ip);
+
+ if (self->sym) {
+ ret += fprintf(fp, "[%c] %s",
+ self->dso == kernel_dso ? 'k' : '.', self->sym->name);
+ } else {
+ ret += fprintf(fp, "%#016llx", (__u64)self->ip);
+ }
+
+ return ret;
+}
+
+static struct sort_entry sort_sym = {
+ .header = "Symbol",
+ .cmp = sort__sym_cmp,
+ .print = sort__sym_print,
+};
+
+static int sort__need_collapse = 0;
+
+struct sort_dimension {
+ char *name;
+ struct sort_entry *entry;
+ int taken;
+};
+
+static struct sort_dimension sort_dimensions[] = {
+ { .name = "pid", .entry = &sort_thread, },
+ { .name = "comm", .entry = &sort_comm, },
+ { .name = "dso", .entry = &sort_dso, },
+ { .name = "symbol", .entry = &sort_sym, },
+};
+
+static LIST_HEAD(hist_entry__sort_list);
+
+static int sort_dimension__add(char *tok)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
+ struct sort_dimension *sd = &sort_dimensions[i];
+
+ if (sd->taken)
+ continue;
+
+ if (strncasecmp(tok, sd->name, strlen(tok)))
+ continue;
+
+ if (sd->entry->collapse)
+ sort__need_collapse = 1;
+
+ list_add_tail(&sd->entry->list, &hist_entry__sort_list);
+ sd->taken = 1;
+
+ return 0;
+ }
+
+ return -ESRCH;
+}
+
+static int64_t
+hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ struct sort_entry *se;
+ int64_t cmp = 0;
+
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ cmp = se->cmp(left, right);
+ if (cmp)
+ break;
+ }
+
+ return cmp;
+}
+
+static int64_t
+hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
+{
+ struct sort_entry *se;
+ int64_t cmp = 0;
+
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ int64_t (*f)(struct hist_entry *, struct hist_entry *);
+
+ f = se->collapse ?: se->cmp;
+
+ cmp = f(left, right);
+ if (cmp)
+ break;
+ }
+
+ return cmp;
+}
+
+static size_t
+hist_entry__fprintf(FILE *fp, struct hist_entry *self, __u64 total_samples)
+{
+ struct sort_entry *se;
+ size_t ret;
+
+ if (total_samples) {
+ double percent = self->count * 100.0 / total_samples;
+ char *color = PERF_COLOR_NORMAL;
+
+ /*
+ * We color high-overhead entries in red, mid-overhead
+ * entries in green - and keep the low overhead places
+ * normal:
+ */
+ if (percent >= 5.0) {
+ color = PERF_COLOR_RED;
+ } else {
+ if (percent >= 0.5)
+ color = PERF_COLOR_GREEN;
+ }
+
+ ret = color_fprintf(fp, color, " %6.2f%%",
+ (self->count * 100.0) / total_samples);
+ } else
+ ret = fprintf(fp, "%12Ld ", self->count);
+
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ fprintf(fp, " ");
+ ret += se->print(fp, self);
+ }
+
+ ret += fprintf(fp, "\n");
+
+ return ret;
+}
+
+/*
+ * collect histogram counts
+ */
+
+static int
+hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
+ struct symbol *sym, __u64 ip, char level, __u64 count)
+{
+ struct rb_node **p = &hist.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *he;
+ struct hist_entry entry = {
+ .thread = thread,
+ .map = map,
+ .dso = dso,
+ .sym = sym,
+ .ip = ip,
+ .level = level,
+ .count = count,
+ };
+ int cmp;
+
+ while (*p != NULL) {
+ parent = *p;
+ he = rb_entry(parent, struct hist_entry, rb_node);
+
+ cmp = hist_entry__cmp(&entry, he);
+
+ if (!cmp) {
+ he->count += count;
+ return 0;
+ }
+
+ if (cmp < 0)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ he = malloc(sizeof(*he));
+ if (!he)
+ return -ENOMEM;
+ *he = entry;
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &hist);
+
+ return 0;
+}
+
+static void hist_entry__free(struct hist_entry *he)
+{
+ free(he);
+}
+
+/*
+ * collapse the histogram
+ */
+
+static struct rb_root collapse_hists;
+
+static void collapse__insert_entry(struct hist_entry *he)
+{
+ struct rb_node **p = &collapse_hists.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *iter;
+ int64_t cmp;
+
+ while (*p != NULL) {
+ parent = *p;
+ iter = rb_entry(parent, struct hist_entry, rb_node);
+
+ cmp = hist_entry__collapse(iter, he);
+
+ if (!cmp) {
+ iter->count += he->count;
+ hist_entry__free(he);
+ return;
+ }
+
+ if (cmp < 0)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &collapse_hists);
+}
+
+static void collapse__resort(void)
+{
+ struct rb_node *next;
+ struct hist_entry *n;
+
+ if (!sort__need_collapse)
+ return;
+
+ next = rb_first(&hist);
+ while (next) {
+ n = rb_entry(next, struct hist_entry, rb_node);
+ next = rb_next(&n->rb_node);
+
+ rb_erase(&n->rb_node, &hist);
+ collapse__insert_entry(n);
+ }
+}
+
+/*
+ * reverse the map, sort on count.
+ */
+
+static struct rb_root output_hists;
+
+static void output__insert_entry(struct hist_entry *he)
+{
+ struct rb_node **p = &output_hists.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *iter;
+
+ while (*p != NULL) {
+ parent = *p;
+ iter = rb_entry(parent, struct hist_entry, rb_node);
+
+ if (he->count > iter->count)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &output_hists);
+}
+
+static void output__resort(void)
+{
+ struct rb_node *next;
+ struct hist_entry *n;
+ struct rb_root *tree = &hist;
+
+ if (sort__need_collapse)
+ tree = &collapse_hists;
+
+ next = rb_first(tree);
+
+ while (next) {
+ n = rb_entry(next, struct hist_entry, rb_node);
+ next = rb_next(&n->rb_node);
+
+ rb_erase(&n->rb_node, tree);
+ output__insert_entry(n);
+ }
+}
+
+static size_t output__fprintf(FILE *fp, __u64 total_samples)
+{
+ struct hist_entry *pos;
+ struct sort_entry *se;
+ struct rb_node *nd;
+ size_t ret = 0;
+
+ fprintf(fp, "\n");
+ fprintf(fp, "#\n");
+ fprintf(fp, "# (%Ld samples)\n", (__u64)total_samples);
+ fprintf(fp, "#\n");
+
+ fprintf(fp, "# Overhead");
+ list_for_each_entry(se, &hist_entry__sort_list, list)
+ fprintf(fp, " %s", se->header);
+ fprintf(fp, "\n");
+
+ fprintf(fp, "# ........");
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ int i;
+
+ fprintf(fp, " ");
+ for (i = 0; i < strlen(se->header); i++)
+ fprintf(fp, ".");
+ }
+ fprintf(fp, "\n");
+
+ fprintf(fp, "#\n");
+
+ for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
+ pos = rb_entry(nd, struct hist_entry, rb_node);
+ ret += hist_entry__fprintf(fp, pos, total_samples);
+ }
+
+ if (!strcmp(sort_order, default_sort_order)) {
+ fprintf(fp, "#\n");
+ fprintf(fp, "# (For more details, try: perf report --sort comm,dso,symbol)\n");
+ fprintf(fp, "#\n");
+ }
+ fprintf(fp, "\n");
+
+ return ret;
+}
+
+static void register_idle_thread(void)
+{
+ struct thread *thread = threads__findnew(0);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, "[idle]")) {
+ fprintf(stderr, "problem inserting idle task.\n");
+ exit(-1);
+ }
+}
+
+static unsigned long total = 0,
+ total_mmap = 0,
+ total_comm = 0,
+ total_fork = 0,
+ total_unknown = 0;
+
+static int
+process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ char level;
+ int show = 0;
+ struct dso *dso = NULL;
+ struct thread *thread = threads__findnew(event->ip.pid);
+ __u64 ip = event->ip.ip;
+ __u64 period = 1;
+ struct map *map = NULL;
+
+ if (event->header.type & PERF_SAMPLE_PERIOD)
+ period = event->ip.period;
+
+ dprintf("%p [%p]: PERF_EVENT (IP, %d): %d: %p period: %Ld\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.misc,
+ event->ip.pid,
+ (void *)(long)ip,
+ (long long)period);
+
+ dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
+
+ if (thread == NULL) {
+ fprintf(stderr, "problem processing %d event, skipping it.\n",
+ event->header.type);
+ return -1;
+ }
+
+ if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
+ show = SHOW_KERNEL;
+ level = 'k';
+
+ dso = kernel_dso;
+
+ dprintf(" ...... dso: %s\n", dso->name);
+
+ } else if (event->header.misc & PERF_EVENT_MISC_USER) {
+
+ show = SHOW_USER;
+ level = '.';
+
+ map = thread__find_map(thread, ip);
+ if (map != NULL) {
+ ip = map->map_ip(map, ip);
+ dso = map->dso;
+ } else {
+ /*
+ * If this is outside of all known maps,
+ * and is a negative address, try to look it
+ * up in the kernel dso, as it might be a
+ * vsyscall (which executes in user-mode):
+ */
+ if ((long long)ip < 0)
+ dso = kernel_dso;
+ }
+ dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
+
+ } else {
+ show = SHOW_HV;
+ level = 'H';
+ dprintf(" ...... dso: [hypervisor]\n");
+ }
+
+ if (show & show_mask) {
+ struct symbol *sym = NULL;
+
+ if (dso)
+ sym = dso->find_symbol(dso, ip);
+
+ if (hist_entry__add(thread, map, dso, sym, ip, level, period)) {
+ fprintf(stderr,
+ "problem incrementing symbol count, skipping event\n");
+ return -1;
+ }
+ }
+ total += period;
+
+ return 0;
+}
+
+static int
+process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->mmap.pid);
+ struct map *map = map__new(&event->mmap);
+
+ dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->mmap.pid,
+ (void *)(long)event->mmap.start,
+ (void *)(long)event->mmap.len,
+ (void *)(long)event->mmap.pgoff,
+ event->mmap.filename);
+
+ if (thread == NULL || map == NULL) {
+ dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
+ return 0;
+ }
+
+ thread__insert_map(thread, map);
+ total_mmap++;
+
+ return 0;
+}
+
+static int
+process_comm_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->comm.pid);
+
+ dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->comm.comm, event->comm.pid);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, event->comm.comm)) {
+ dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
+ return -1;
+ }
+ total_comm++;
+
+ return 0;
+}
+
+static int
+process_fork_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->fork.pid);
+ struct thread *parent = threads__findnew(event->fork.ppid);
+
+ dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->fork.pid, event->fork.ppid);
+
+ if (!thread || !parent || thread__fork(thread, parent)) {
+ dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
+ return -1;
+ }
+ total_fork++;
+
+ return 0;
+}
+
+static int
+process_period_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->period.time,
+ event->period.id,
+ event->period.sample_period);
+
+ return 0;
+}
+
+static int
+process_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
+ return process_overflow_event(event, offset, head);
+
+ switch (event->header.type) {
+ case PERF_EVENT_MMAP:
+ return process_mmap_event(event, offset, head);
+
+ case PERF_EVENT_COMM:
+ return process_comm_event(event, offset, head);
+
+ case PERF_EVENT_FORK:
+ return process_fork_event(event, offset, head);
+
+ case PERF_EVENT_PERIOD:
+ return process_period_event(event, offset, head);
+ /*
+ * We dont process them right now but they are fine:
+ */
+
+ case PERF_EVENT_THROTTLE:
+ case PERF_EVENT_UNTHROTTLE:
+ return 0;
+
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+static int __cmd_report(void)
+{
+ int ret, rc = EXIT_FAILURE;
+ unsigned long offset = 0;
+ unsigned long head = 0;
+ struct stat stat;
+ event_t *event;
+ uint32_t size;
+ char *buf;
+
+ register_idle_thread();
+
+ input = open(input_name, O_RDONLY);
+ if (input < 0) {
+ fprintf(stderr, " failed to open file: %s", input_name);
+ if (!strcmp(input_name, "perf.data"))
+ fprintf(stderr, " (try 'perf record' first)");
+ fprintf(stderr, "\n");
+ exit(-1);
+ }
+
+ ret = fstat(input, &stat);
+ if (ret < 0) {
+ perror("failed to stat file");
+ exit(-1);
+ }
+
+ if (!stat.st_size) {
+ fprintf(stderr, "zero-sized file, nothing to do!\n");
+ exit(0);
+ }
+
+ if (load_kernel() < 0) {
+ perror("failed to load kernel symbols");
+ return EXIT_FAILURE;
+ }
+
+ if (!full_paths) {
+ if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
+ perror("failed to get the current directory");
+ return EXIT_FAILURE;
+ }
+ cwdlen = strlen(cwd);
+ } else {
+ cwd = NULL;
+ cwdlen = 0;
+ }
+remap:
+ buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
+ MAP_SHARED, input, offset);
+ if (buf == MAP_FAILED) {
+ perror("failed to mmap file");
+ exit(-1);
+ }
+
+more:
+ event = (event_t *)(buf + head);
+
+ size = event->header.size;
+ if (!size)
+ size = 8;
+
+ if (head + event->header.size >= page_size * mmap_window) {
+ unsigned long shift = page_size * (head / page_size);
+ int ret;
+
+ ret = munmap(buf, page_size * mmap_window);
+ assert(ret == 0);
+
+ offset += shift;
+ head -= shift;
+ goto remap;
+ }
+
+ size = event->header.size;
+
+ dprintf("%p [%p]: event: %d\n",
+ (void *)(offset + head),
+ (void *)(long)event->header.size,
+ event->header.type);
+
+ if (!size || process_event(event, offset, head) < 0) {
+
+ dprintf("%p [%p]: skipping unknown header type: %d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.type);
+
+ total_unknown++;
+
+ /*
+ * assume we lost track of the stream, check alignment, and
+ * increment a single u64 in the hope to catch on again 'soon'.
+ */
+
+ if (unlikely(head & 7))
+ head &= ~7ULL;
+
+ size = 8;
+ }
+
+ head += size;
+
+ if (offset + head < stat.st_size)
+ goto more;
+
+ rc = EXIT_SUCCESS;
+ close(input);
+
+ dprintf(" IP events: %10ld\n", total);
+ dprintf(" mmap events: %10ld\n", total_mmap);
+ dprintf(" comm events: %10ld\n", total_comm);
+ dprintf(" fork events: %10ld\n", total_fork);
+ dprintf(" unknown events: %10ld\n", total_unknown);
+
+ if (dump_trace)
+ return 0;
+
+ if (verbose >= 3)
+ threads__fprintf(stdout);
+
+ if (verbose >= 2)
+ dsos__fprintf(stdout);
+
+ collapse__resort();
+ output__resort();
+ output__fprintf(stdout, total);
+
+ return rc;
+}
+
+static const char * const report_usage[] = {
+ "perf report [<options>] <command>",
+ NULL
+};
+
+static const struct option options[] = {
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
+ OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
+ OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
+ "sort by key(s): pid, comm, dso, symbol. Default: pid,symbol"),
+ OPT_BOOLEAN('P', "full-paths", &full_paths,
+ "Don't shorten the pathnames taking into account the cwd"),
+ OPT_END()
+};
+
+static void setup_sorting(void)
+{
+ char *tmp, *tok, *str = strdup(sort_order);
+
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp)) {
+ if (sort_dimension__add(tok) < 0) {
+ error("Unknown --sort key: `%s'", tok);
+ usage_with_options(report_usage, options);
+ }
+ }
+
+ free(str);
+}
+
+int cmd_report(int argc, const char **argv, const char *prefix)
+{
+ symbol__init();
+
+ page_size = getpagesize();
+
+ argc = parse_options(argc, argv, options, report_usage, 0);
+
+ setup_sorting();
+
+ /*
+ * Any (unrecognized) arguments left?
+ */
+ if (argc)
+ usage_with_options(report_usage, options);
+
+ setup_pager();
+
+ return __cmd_report();
+}
--- /dev/null
+/*
+ * builtin-stat.c
+ *
+ * Builtin stat command: Give a precise performance counters summary
+ * overview about any workload, CPU or specific PID.
+ *
+ * Sample output:
+
+ $ perf stat ~/hackbench 10
+ Time: 0.104
+
+ Performance counter stats for '/home/mingo/hackbench':
+
+ 1255.538611 task clock ticks # 10.143 CPU utilization factor
+ 54011 context switches # 0.043 M/sec
+ 385 CPU migrations # 0.000 M/sec
+ 17755 pagefaults # 0.014 M/sec
+ 3808323185 CPU cycles # 3033.219 M/sec
+ 1575111190 instructions # 1254.530 M/sec
+ 17367895 cache references # 13.833 M/sec
+ 7674421 cache misses # 6.112 M/sec
+
+ Wall-clock time elapsed: 123.786620 msecs
+
+ *
+ * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ *
+ * Improvements and fixes by:
+ *
+ * Arjan van de Ven <arjan@linux.intel.com>
+ * Yanmin Zhang <yanmin.zhang@intel.com>
+ * Wu Fengguang <fengguang.wu@intel.com>
+ * Mike Galbraith <efault@gmx.de>
+ * Paul Mackerras <paulus@samba.org>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+
+#include "perf.h"
+#include "builtin.h"
+#include "util/util.h"
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+
+#include <sys/prctl.h>
+
+static struct perf_counter_attr default_attrs[MAX_COUNTERS] = {
+
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES},
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
+
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES},
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
+
+};
+
+static int system_wide = 0;
+static int inherit = 1;
+static int verbose = 0;
+
+static int fd[MAX_NR_CPUS][MAX_COUNTERS];
+
+static int target_pid = -1;
+static int nr_cpus = 0;
+static unsigned int page_size;
+
+static int scale = 1;
+
+static const unsigned int default_count[] = {
+ 1000000,
+ 1000000,
+ 10000,
+ 10000,
+ 1000000,
+ 10000,
+};
+
+static __u64 event_res[MAX_COUNTERS][3];
+static __u64 event_scaled[MAX_COUNTERS];
+
+static __u64 runtime_nsecs;
+static __u64 walltime_nsecs;
+static __u64 runtime_cycles;
+
+static void create_perf_stat_counter(int counter)
+{
+ struct perf_counter_attr *attr = attrs + counter;
+
+ if (scale)
+ attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
+ PERF_FORMAT_TOTAL_TIME_RUNNING;
+
+ if (system_wide) {
+ int cpu;
+ for (cpu = 0; cpu < nr_cpus; cpu ++) {
+ fd[cpu][counter] = sys_perf_counter_open(attr, -1, cpu, -1, 0);
+ if (fd[cpu][counter] < 0 && verbose) {
+ printf("Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n", counter, fd[cpu][counter], strerror(errno));
+ }
+ }
+ } else {
+ attr->inherit = inherit;
+ attr->disabled = 1;
+
+ fd[0][counter] = sys_perf_counter_open(attr, 0, -1, -1, 0);
+ if (fd[0][counter] < 0 && verbose) {
+ printf("Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n", counter, fd[0][counter], strerror(errno));
+ }
+ }
+}
+
+/*
+ * Does the counter have nsecs as a unit?
+ */
+static inline int nsec_counter(int counter)
+{
+ if (attrs[counter].type != PERF_TYPE_SOFTWARE)
+ return 0;
+
+ if (attrs[counter].config == PERF_COUNT_SW_CPU_CLOCK)
+ return 1;
+
+ if (attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * Read out the results of a single counter:
+ */
+static void read_counter(int counter)
+{
+ __u64 *count, single_count[3];
+ ssize_t res;
+ int cpu, nv;
+ int scaled;
+
+ count = event_res[counter];
+
+ count[0] = count[1] = count[2] = 0;
+
+ nv = scale ? 3 : 1;
+ for (cpu = 0; cpu < nr_cpus; cpu ++) {
+ if (fd[cpu][counter] < 0)
+ continue;
+
+ res = read(fd[cpu][counter], single_count, nv * sizeof(__u64));
+ assert(res == nv * sizeof(__u64));
+
+ count[0] += single_count[0];
+ if (scale) {
+ count[1] += single_count[1];
+ count[2] += single_count[2];
+ }
+ }
+
+ scaled = 0;
+ if (scale) {
+ if (count[2] == 0) {
+ event_scaled[counter] = -1;
+ count[0] = 0;
+ return;
+ }
+
+ if (count[2] < count[1]) {
+ event_scaled[counter] = 1;
+ count[0] = (unsigned long long)
+ ((double)count[0] * count[1] / count[2] + 0.5);
+ }
+ }
+ /*
+ * Save the full runtime - to allow normalization during printout:
+ */
+ if (attrs[counter].type == PERF_TYPE_SOFTWARE &&
+ attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK)
+ runtime_nsecs = count[0];
+ if (attrs[counter].type == PERF_TYPE_HARDWARE &&
+ attrs[counter].config == PERF_COUNT_HW_CPU_CYCLES)
+ runtime_cycles = count[0];
+}
+
+/*
+ * Print out the results of a single counter:
+ */
+static void print_counter(int counter)
+{
+ __u64 *count;
+ int scaled;
+
+ count = event_res[counter];
+ scaled = event_scaled[counter];
+
+ if (scaled == -1) {
+ fprintf(stderr, " %14s %-20s\n",
+ "<not counted>", event_name(counter));
+ return;
+ }
+
+ if (nsec_counter(counter)) {
+ double msecs = (double)count[0] / 1000000;
+
+ fprintf(stderr, " %14.6f %-20s",
+ msecs, event_name(counter));
+ if (attrs[counter].type == PERF_TYPE_SOFTWARE &&
+ attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) {
+
+ if (walltime_nsecs)
+ fprintf(stderr, " # %11.3f CPU utilization factor",
+ (double)count[0] / (double)walltime_nsecs);
+ }
+ } else {
+ fprintf(stderr, " %14Ld %-20s",
+ count[0], event_name(counter));
+ if (runtime_nsecs)
+ fprintf(stderr, " # %11.3f M/sec",
+ (double)count[0]/runtime_nsecs*1000.0);
+ if (runtime_cycles &&
+ attrs[counter].type == PERF_TYPE_HARDWARE &&
+ attrs[counter].config == PERF_COUNT_HW_INSTRUCTIONS) {
+
+ fprintf(stderr, " # %1.3f per cycle",
+ (double)count[0] / (double)runtime_cycles);
+ }
+ }
+ if (scaled)
+ fprintf(stderr, " (scaled from %.2f%%)",
+ (double) count[2] / count[1] * 100);
+ fprintf(stderr, "\n");
+}
+
+static int do_perf_stat(int argc, const char **argv)
+{
+ unsigned long long t0, t1;
+ int counter;
+ int status;
+ int pid;
+ int i;
+
+ if (!system_wide)
+ nr_cpus = 1;
+
+ for (counter = 0; counter < nr_counters; counter++)
+ create_perf_stat_counter(counter);
+
+ /*
+ * Enable counters and exec the command:
+ */
+ t0 = rdclock();
+ prctl(PR_TASK_PERF_COUNTERS_ENABLE);
+
+ if ((pid = fork()) < 0)
+ perror("failed to fork");
+
+ if (!pid) {
+ if (execvp(argv[0], (char **)argv)) {
+ perror(argv[0]);
+ exit(-1);
+ }
+ }
+
+ while (wait(&status) >= 0)
+ ;
+
+ prctl(PR_TASK_PERF_COUNTERS_DISABLE);
+ t1 = rdclock();
+
+ walltime_nsecs = t1 - t0;
+
+ fflush(stdout);
+
+ fprintf(stderr, "\n");
+ fprintf(stderr, " Performance counter stats for \'%s", argv[0]);
+
+ for (i = 1; i < argc; i++)
+ fprintf(stderr, " %s", argv[i]);
+
+ fprintf(stderr, "\':\n");
+ fprintf(stderr, "\n");
+
+ for (counter = 0; counter < nr_counters; counter++)
+ read_counter(counter);
+
+ for (counter = 0; counter < nr_counters; counter++)
+ print_counter(counter);
+
+
+ fprintf(stderr, "\n");
+ fprintf(stderr, " Wall-clock time elapsed: %12.6f msecs\n",
+ (double)(t1-t0)/1e6);
+ fprintf(stderr, "\n");
+
+ return 0;
+}
+
+static volatile int signr = -1;
+
+static void skip_signal(int signo)
+{
+ signr = signo;
+}
+
+static void sig_atexit(void)
+{
+ if (signr == -1)
+ return;
+
+ signal(signr, SIG_DFL);
+ kill(getpid(), signr);
+}
+
+static const char * const stat_usage[] = {
+ "perf stat [<options>] <command>",
+ NULL
+};
+
+static const struct option options[] = {
+ OPT_CALLBACK('e', "event", NULL, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events),
+ OPT_BOOLEAN('i', "inherit", &inherit,
+ "child tasks inherit counters"),
+ OPT_INTEGER('p', "pid", &target_pid,
+ "stat events on existing pid"),
+ OPT_BOOLEAN('a', "all-cpus", &system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_BOOLEAN('S', "scale", &scale,
+ "scale/normalize counters"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_END()
+};
+
+int cmd_stat(int argc, const char **argv, const char *prefix)
+{
+ page_size = sysconf(_SC_PAGE_SIZE);
+
+ memcpy(attrs, default_attrs, sizeof(attrs));
+
+ argc = parse_options(argc, argv, options, stat_usage, 0);
+ if (!argc)
+ usage_with_options(stat_usage, options);
+
+ if (!nr_counters)
+ nr_counters = 8;
+
+ nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ assert(nr_cpus <= MAX_NR_CPUS);
+ assert(nr_cpus >= 0);
+
+ /*
+ * We dont want to block the signals - that would cause
+ * child tasks to inherit that and Ctrl-C would not work.
+ * What we want is for Ctrl-C to work in the exec()-ed
+ * task, but being ignored by perf stat itself:
+ */
+ atexit(sig_atexit);
+ signal(SIGINT, skip_signal);
+ signal(SIGALRM, skip_signal);
+ signal(SIGABRT, skip_signal);
+
+ return do_perf_stat(argc, argv);
+}
--- /dev/null
+/*
+ * builtin-top.c
+ *
+ * Builtin top command: Display a continuously updated profile of
+ * any workload, CPU or specific PID.
+ *
+ * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ *
+ * Improvements and fixes by:
+ *
+ * Arjan van de Ven <arjan@linux.intel.com>
+ * Yanmin Zhang <yanmin.zhang@intel.com>
+ * Wu Fengguang <fengguang.wu@intel.com>
+ * Mike Galbraith <efault@gmx.de>
+ * Paul Mackerras <paulus@samba.org>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+#include "builtin.h"
+
+#include "perf.h"
+
+#include "util/symbol.h"
+#include "util/color.h"
+#include "util/util.h"
+#include "util/rbtree.h"
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+
+#include <assert.h>
+#include <fcntl.h>
+
+#include <stdio.h>
+
+#include <errno.h>
+#include <time.h>
+#include <sched.h>
+#include <pthread.h>
+
+#include <sys/syscall.h>
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+#include <sys/prctl.h>
+#include <sys/wait.h>
+#include <sys/uio.h>
+#include <sys/mman.h>
+
+#include <linux/unistd.h>
+#include <linux/types.h>
+
+static int fd[MAX_NR_CPUS][MAX_COUNTERS];
+
+static int system_wide = 0;
+
+static int default_interval = 100000;
+
+static __u64 count_filter = 5;
+static int print_entries = 15;
+
+static int target_pid = -1;
+static int profile_cpu = -1;
+static int nr_cpus = 0;
+static unsigned int realtime_prio = 0;
+static int group = 0;
+static unsigned int page_size;
+static unsigned int mmap_pages = 16;
+static int freq = 0;
+static int verbose = 0;
+
+static char *sym_filter;
+static unsigned long filter_start;
+static unsigned long filter_end;
+
+static int delay_secs = 2;
+static int zero;
+static int dump_symtab;
+
+/*
+ * Symbols
+ */
+
+static __u64 min_ip;
+static __u64 max_ip = -1ll;
+
+struct sym_entry {
+ struct rb_node rb_node;
+ struct list_head node;
+ unsigned long count[MAX_COUNTERS];
+ unsigned long snap_count;
+ double weight;
+ int skip;
+};
+
+struct sym_entry *sym_filter_entry;
+
+struct dso *kernel_dso;
+
+/*
+ * Symbols will be added here in record_ip and will get out
+ * after decayed.
+ */
+static LIST_HEAD(active_symbols);
+static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER;
+
+/*
+ * Ordering weight: count-1 * count-2 * ... / count-n
+ */
+static double sym_weight(const struct sym_entry *sym)
+{
+ double weight = sym->snap_count;
+ int counter;
+
+ for (counter = 1; counter < nr_counters-1; counter++)
+ weight *= sym->count[counter];
+
+ weight /= (sym->count[counter] + 1);
+
+ return weight;
+}
+
+static long samples;
+static long userspace_samples;
+static const char CONSOLE_CLEAR[] = "\e[H\e[2J";
+
+static void __list_insert_active_sym(struct sym_entry *syme)
+{
+ list_add(&syme->node, &active_symbols);
+}
+
+static void list_remove_active_sym(struct sym_entry *syme)
+{
+ pthread_mutex_lock(&active_symbols_lock);
+ list_del_init(&syme->node);
+ pthread_mutex_unlock(&active_symbols_lock);
+}
+
+static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
+{
+ struct rb_node **p = &tree->rb_node;
+ struct rb_node *parent = NULL;
+ struct sym_entry *iter;
+
+ while (*p != NULL) {
+ parent = *p;
+ iter = rb_entry(parent, struct sym_entry, rb_node);
+
+ if (se->weight > iter->weight)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&se->rb_node, parent, p);
+ rb_insert_color(&se->rb_node, tree);
+}
+
+static void print_sym_table(void)
+{
+ int printed = 0, j;
+ int counter;
+ float samples_per_sec = samples/delay_secs;
+ float ksamples_per_sec = (samples-userspace_samples)/delay_secs;
+ float sum_ksamples = 0.0;
+ struct sym_entry *syme, *n;
+ struct rb_root tmp = RB_ROOT;
+ struct rb_node *nd;
+
+ samples = userspace_samples = 0;
+
+ /* Sort the active symbols */
+ pthread_mutex_lock(&active_symbols_lock);
+ syme = list_entry(active_symbols.next, struct sym_entry, node);
+ pthread_mutex_unlock(&active_symbols_lock);
+
+ list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
+ syme->snap_count = syme->count[0];
+ if (syme->snap_count != 0) {
+ syme->weight = sym_weight(syme);
+ rb_insert_active_sym(&tmp, syme);
+ sum_ksamples += syme->snap_count;
+
+ for (j = 0; j < nr_counters; j++)
+ syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
+ } else
+ list_remove_active_sym(syme);
+ }
+
+ puts(CONSOLE_CLEAR);
+
+ printf(
+"------------------------------------------------------------------------------\n");
+ printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [",
+ samples_per_sec,
+ 100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec)));
+
+ if (nr_counters == 1) {
+ printf("%Ld", attrs[0].sample_period);
+ if (freq)
+ printf("Hz ");
+ else
+ printf(" ");
+ }
+
+ for (counter = 0; counter < nr_counters; counter++) {
+ if (counter)
+ printf("/");
+
+ printf("%s", event_name(counter));
+ }
+
+ printf( "], ");
+
+ if (target_pid != -1)
+ printf(" (target_pid: %d", target_pid);
+ else
+ printf(" (all");
+
+ if (profile_cpu != -1)
+ printf(", cpu: %d)\n", profile_cpu);
+ else {
+ if (target_pid != -1)
+ printf(")\n");
+ else
+ printf(", %d CPUs)\n", nr_cpus);
+ }
+
+ printf("------------------------------------------------------------------------------\n\n");
+
+ if (nr_counters == 1)
+ printf(" samples pcnt");
+ else
+ printf(" weight samples pcnt");
+
+ printf(" RIP kernel function\n"
+ " ______ _______ _____ ________________ _______________\n\n"
+ );
+
+ for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
+ struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node);
+ struct symbol *sym = (struct symbol *)(syme + 1);
+ char *color = PERF_COLOR_NORMAL;
+ double pcnt;
+
+ if (++printed > print_entries || syme->snap_count < count_filter)
+ continue;
+
+ pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
+ sum_ksamples));
+
+ /*
+ * We color high-overhead entries in red, mid-overhead
+ * entries in green - and keep the low overhead places
+ * normal:
+ */
+ if (pcnt >= 5.0) {
+ color = PERF_COLOR_RED;
+ } else {
+ if (pcnt >= 0.5)
+ color = PERF_COLOR_GREEN;
+ }
+
+ if (nr_counters == 1)
+ printf("%20.2f - ", syme->weight);
+ else
+ printf("%9.1f %10ld - ", syme->weight, syme->snap_count);
+
+ color_fprintf(stdout, color, "%4.1f%%", pcnt);
+ printf(" - %016llx : %s\n", sym->start, sym->name);
+ }
+}
+
+static void *display_thread(void *arg)
+{
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ int delay_msecs = delay_secs * 1000;
+
+ printf("PerfTop refresh period: %d seconds\n", delay_secs);
+
+ do {
+ print_sym_table();
+ } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
+
+ printf("key pressed - exiting.\n");
+ exit(0);
+
+ return NULL;
+}
+
+static int symbol_filter(struct dso *self, struct symbol *sym)
+{
+ static int filter_match;
+ struct sym_entry *syme;
+ const char *name = sym->name;
+
+ if (!strcmp(name, "_text") ||
+ !strcmp(name, "_etext") ||
+ !strcmp(name, "_sinittext") ||
+ !strncmp("init_module", name, 11) ||
+ !strncmp("cleanup_module", name, 14) ||
+ strstr(name, "_text_start") ||
+ strstr(name, "_text_end"))
+ return 1;
+
+ syme = dso__sym_priv(self, sym);
+ /* Tag samples to be skipped. */
+ if (!strcmp("default_idle", name) ||
+ !strcmp("cpu_idle", name) ||
+ !strcmp("enter_idle", name) ||
+ !strcmp("exit_idle", name) ||
+ !strcmp("mwait_idle", name))
+ syme->skip = 1;
+
+ if (filter_match == 1) {
+ filter_end = sym->start;
+ filter_match = -1;
+ if (filter_end - filter_start > 10000) {
+ fprintf(stderr,
+ "hm, too large filter symbol <%s> - skipping.\n",
+ sym_filter);
+ fprintf(stderr, "symbol filter start: %016lx\n",
+ filter_start);
+ fprintf(stderr, " end: %016lx\n",
+ filter_end);
+ filter_end = filter_start = 0;
+ sym_filter = NULL;
+ sleep(1);
+ }
+ }
+
+ if (filter_match == 0 && sym_filter && !strcmp(name, sym_filter)) {
+ filter_match = 1;
+ filter_start = sym->start;
+ }
+
+
+ return 0;
+}
+
+static int parse_symbols(void)
+{
+ struct rb_node *node;
+ struct symbol *sym;
+
+ kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry));
+ if (kernel_dso == NULL)
+ return -1;
+
+ if (dso__load_kernel(kernel_dso, NULL, symbol_filter, 1) != 0)
+ goto out_delete_dso;
+
+ node = rb_first(&kernel_dso->syms);
+ sym = rb_entry(node, struct symbol, rb_node);
+ min_ip = sym->start;
+
+ node = rb_last(&kernel_dso->syms);
+ sym = rb_entry(node, struct symbol, rb_node);
+ max_ip = sym->end;
+
+ if (dump_symtab)
+ dso__fprintf(kernel_dso, stderr);
+
+ return 0;
+
+out_delete_dso:
+ dso__delete(kernel_dso);
+ kernel_dso = NULL;
+ return -1;
+}
+
+#define TRACE_COUNT 3
+
+/*
+ * Binary search in the histogram table and record the hit:
+ */
+static void record_ip(__u64 ip, int counter)
+{
+ struct symbol *sym = dso__find_symbol(kernel_dso, ip);
+
+ if (sym != NULL) {
+ struct sym_entry *syme = dso__sym_priv(kernel_dso, sym);
+
+ if (!syme->skip) {
+ syme->count[counter]++;
+ pthread_mutex_lock(&active_symbols_lock);
+ if (list_empty(&syme->node) || !syme->node.next)
+ __list_insert_active_sym(syme);
+ pthread_mutex_unlock(&active_symbols_lock);
+ return;
+ }
+ }
+
+ samples--;
+}
+
+static void process_event(__u64 ip, int counter)
+{
+ samples++;
+
+ if (ip < min_ip || ip > max_ip) {
+ userspace_samples++;
+ return;
+ }
+
+ record_ip(ip, counter);
+}
+
+struct mmap_data {
+ int counter;
+ void *base;
+ unsigned int mask;
+ unsigned int prev;
+};
+
+static unsigned int mmap_read_head(struct mmap_data *md)
+{
+ struct perf_counter_mmap_page *pc = md->base;
+ int head;
+
+ head = pc->data_head;
+ rmb();
+
+ return head;
+}
+
+struct timeval last_read, this_read;
+
+static void mmap_read_counter(struct mmap_data *md)
+{
+ unsigned int head = mmap_read_head(md);
+ unsigned int old = md->prev;
+ unsigned char *data = md->base + page_size;
+ int diff;
+
+ gettimeofday(&this_read, NULL);
+
+ /*
+ * If we're further behind than half the buffer, there's a chance
+ * the writer will bite our tail and mess up the samples under us.
+ *
+ * If we somehow ended up ahead of the head, we got messed up.
+ *
+ * In either case, truncate and restart at head.
+ */
+ diff = head - old;
+ if (diff > md->mask / 2 || diff < 0) {
+ struct timeval iv;
+ unsigned long msecs;
+
+ timersub(&this_read, &last_read, &iv);
+ msecs = iv.tv_sec*1000 + iv.tv_usec/1000;
+
+ fprintf(stderr, "WARNING: failed to keep up with mmap data."
+ " Last read %lu msecs ago.\n", msecs);
+
+ /*
+ * head points to a known good entry, start there.
+ */
+ old = head;
+ }
+
+ last_read = this_read;
+
+ for (; old != head;) {
+ struct ip_event {
+ struct perf_event_header header;
+ __u64 ip;
+ __u32 pid, target_pid;
+ };
+ struct mmap_event {
+ struct perf_event_header header;
+ __u32 pid, target_pid;
+ __u64 start;
+ __u64 len;
+ __u64 pgoff;
+ char filename[PATH_MAX];
+ };
+
+ typedef union event_union {
+ struct perf_event_header header;
+ struct ip_event ip;
+ struct mmap_event mmap;
+ } event_t;
+
+ event_t *event = (event_t *)&data[old & md->mask];
+
+ event_t event_copy;
+
+ size_t size = event->header.size;
+
+ /*
+ * Event straddles the mmap boundary -- header should always
+ * be inside due to u64 alignment of output.
+ */
+ if ((old & md->mask) + size != ((old + size) & md->mask)) {
+ unsigned int offset = old;
+ unsigned int len = min(sizeof(*event), size), cpy;
+ void *dst = &event_copy;
+
+ do {
+ cpy = min(md->mask + 1 - (offset & md->mask), len);
+ memcpy(dst, &data[offset & md->mask], cpy);
+ offset += cpy;
+ dst += cpy;
+ len -= cpy;
+ } while (len);
+
+ event = &event_copy;
+ }
+
+ old += size;
+
+ if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) {
+ if (event->header.type & PERF_SAMPLE_IP)
+ process_event(event->ip.ip, md->counter);
+ }
+ }
+
+ md->prev = old;
+}
+
+static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS];
+static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
+
+static void mmap_read(void)
+{
+ int i, counter;
+
+ for (i = 0; i < nr_cpus; i++) {
+ for (counter = 0; counter < nr_counters; counter++)
+ mmap_read_counter(&mmap_array[i][counter]);
+ }
+}
+
+int nr_poll;
+int group_fd;
+
+static void start_counter(int i, int counter)
+{
+ struct perf_counter_attr *attr;
+ unsigned int cpu;
+
+ cpu = profile_cpu;
+ if (target_pid == -1 && profile_cpu == -1)
+ cpu = i;
+
+ attr = attrs + counter;
+
+ attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
+ attr->freq = freq;
+
+try_again:
+ fd[i][counter] = sys_perf_counter_open(attr, target_pid, cpu, group_fd, 0);
+
+ if (fd[i][counter] < 0) {
+ int err = errno;
+
+ if (err == EPERM)
+ die("No permission - are you root?\n");
+ /*
+ * If it's cycles then fall back to hrtimer
+ * based cpu-clock-tick sw counter, which
+ * is always available even if no PMU support:
+ */
+ if (attr->type == PERF_TYPE_HARDWARE
+ && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
+
+ if (verbose)
+ warning(" ... trying to fall back to cpu-clock-ticks\n");
+
+ attr->type = PERF_TYPE_SOFTWARE;
+ attr->config = PERF_COUNT_SW_CPU_CLOCK;
+ goto try_again;
+ }
+ printf("\n");
+ error("perfcounter syscall returned with %d (%s)\n",
+ fd[i][counter], strerror(err));
+ die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n");
+ exit(-1);
+ }
+ assert(fd[i][counter] >= 0);
+ fcntl(fd[i][counter], F_SETFL, O_NONBLOCK);
+
+ /*
+ * First counter acts as the group leader:
+ */
+ if (group && group_fd == -1)
+ group_fd = fd[i][counter];
+
+ event_array[nr_poll].fd = fd[i][counter];
+ event_array[nr_poll].events = POLLIN;
+ nr_poll++;
+
+ mmap_array[i][counter].counter = counter;
+ mmap_array[i][counter].prev = 0;
+ mmap_array[i][counter].mask = mmap_pages*page_size - 1;
+ mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size,
+ PROT_READ, MAP_SHARED, fd[i][counter], 0);
+ if (mmap_array[i][counter].base == MAP_FAILED)
+ die("failed to mmap with %d (%s)\n", errno, strerror(errno));
+}
+
+static int __cmd_top(void)
+{
+ pthread_t thread;
+ int i, counter;
+ int ret;
+
+ for (i = 0; i < nr_cpus; i++) {
+ group_fd = -1;
+ for (counter = 0; counter < nr_counters; counter++)
+ start_counter(i, counter);
+ }
+
+ /* Wait for a minimal set of events before starting the snapshot */
+ poll(event_array, nr_poll, 100);
+
+ mmap_read();
+
+ if (pthread_create(&thread, NULL, display_thread, NULL)) {
+ printf("Could not create display thread.\n");
+ exit(-1);
+ }
+
+ if (realtime_prio) {
+ struct sched_param param;
+
+ param.sched_priority = realtime_prio;
+ if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
+ printf("Could not set realtime priority.\n");
+ exit(-1);
+ }
+ }
+
+ while (1) {
+ int hits = samples;
+
+ mmap_read();
+
+ if (hits == samples)
+ ret = poll(event_array, nr_poll, 100);
+ }
+
+ return 0;
+}
+
+static const char * const top_usage[] = {
+ "perf top [<options>]",
+ NULL
+};
+
+static const struct option options[] = {
+ OPT_CALLBACK('e', "event", NULL, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events),
+ OPT_INTEGER('c', "count", &default_interval,
+ "event period to sample"),
+ OPT_INTEGER('p', "pid", &target_pid,
+ "profile events on existing pid"),
+ OPT_BOOLEAN('a', "all-cpus", &system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_INTEGER('C', "CPU", &profile_cpu,
+ "CPU to profile on"),
+ OPT_INTEGER('m', "mmap-pages", &mmap_pages,
+ "number of mmap data pages"),
+ OPT_INTEGER('r', "realtime", &realtime_prio,
+ "collect data with this RT SCHED_FIFO priority"),
+ OPT_INTEGER('d', "delay", &delay_secs,
+ "number of seconds to delay between refreshes"),
+ OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
+ "dump the symbol table used for profiling"),
+ OPT_INTEGER('f', "count-filter", &count_filter,
+ "only display functions with more events than this"),
+ OPT_BOOLEAN('g', "group", &group,
+ "put the counters into a counter group"),
+ OPT_STRING('s', "sym-filter", &sym_filter, "pattern",
+ "only display symbols matchig this pattern"),
+ OPT_BOOLEAN('z', "zero", &group,
+ "zero history across updates"),
+ OPT_INTEGER('F', "freq", &freq,
+ "profile at this frequency"),
+ OPT_INTEGER('E', "entries", &print_entries,
+ "display this many functions"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_END()
+};
+
+int cmd_top(int argc, const char **argv, const char *prefix)
+{
+ int counter;
+
+ page_size = sysconf(_SC_PAGE_SIZE);
+
+ argc = parse_options(argc, argv, options, top_usage, 0);
+ if (argc)
+ usage_with_options(top_usage, options);
+
+ if (freq) {
+ default_interval = freq;
+ freq = 1;
+ }
+
+ /* CPU and PID are mutually exclusive */
+ if (target_pid != -1 && profile_cpu != -1) {
+ printf("WARNING: PID switch overriding CPU\n");
+ sleep(1);
+ profile_cpu = -1;
+ }
+
+ if (!nr_counters)
+ nr_counters = 1;
+
+ if (delay_secs < 1)
+ delay_secs = 1;
+
+ parse_symbols();
+
+ /*
+ * Fill in the ones not specifically initialized via -c:
+ */
+ for (counter = 0; counter < nr_counters; counter++) {
+ if (attrs[counter].sample_period)
+ continue;
+
+ attrs[counter].sample_period = default_interval;
+ }
+
+ nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ assert(nr_cpus <= MAX_NR_CPUS);
+ assert(nr_cpus >= 0);
+
+ if (target_pid != -1 || profile_cpu != -1)
+ nr_cpus = 1;
+
+ return __cmd_top();
+}
--- /dev/null
+#ifndef BUILTIN_H
+#define BUILTIN_H
+
+#include "util/util.h"
+#include "util/strbuf.h"
+
+extern const char perf_version_string[];
+extern const char perf_usage_string[];
+extern const char perf_more_info_string[];
+
+extern void list_common_cmds_help(void);
+extern const char *help_unknown_cmd(const char *cmd);
+extern void prune_packed_objects(int);
+extern int read_line_with_nul(char *buf, int size, FILE *file);
+extern int check_pager_config(const char *cmd);
+
+extern int cmd_annotate(int argc, const char **argv, const char *prefix);
+extern int cmd_help(int argc, const char **argv, const char *prefix);
+extern int cmd_record(int argc, const char **argv, const char *prefix);
+extern int cmd_report(int argc, const char **argv, const char *prefix);
+extern int cmd_stat(int argc, const char **argv, const char *prefix);
+extern int cmd_top(int argc, const char **argv, const char *prefix);
+extern int cmd_version(int argc, const char **argv, const char *prefix);
+extern int cmd_list(int argc, const char **argv, const char *prefix);
+
+#endif
--- /dev/null
+#
+# List of known perf commands.
+# command name category [deprecated] [common]
+#
+perf-annotate mainporcelain common
+perf-list mainporcelain common
+perf-record mainporcelain common
+perf-report mainporcelain common
+perf-stat mainporcelain common
+perf-top mainporcelain common
--- /dev/null
+
+Performance Counters for Linux
+------------------------------
+
+Performance counters are special hardware registers available on most modern
+CPUs. These registers count the number of certain types of hw events: such
+as instructions executed, cachemisses suffered, or branches mis-predicted -
+without slowing down the kernel or applications. These registers can also
+trigger interrupts when a threshold number of events have passed - and can
+thus be used to profile the code that runs on that CPU.
+
+The Linux Performance Counter subsystem provides an abstraction of these
+hardware capabilities. It provides per task and per CPU counters, counter
+groups, and it provides event capabilities on top of those. It
+provides "virtual" 64-bit counters, regardless of the width of the
+underlying hardware counters.
+
+Performance counters are accessed via special file descriptors.
+There's one file descriptor per virtual counter used.
+
+The special file descriptor is opened via the perf_counter_open()
+system call:
+
+ int sys_perf_counter_open(struct perf_counter_hw_event *hw_event_uptr,
+ pid_t pid, int cpu, int group_fd,
+ unsigned long flags);
+
+The syscall returns the new fd. The fd can be used via the normal
+VFS system calls: read() can be used to read the counter, fcntl()
+can be used to set the blocking mode, etc.
+
+Multiple counters can be kept open at a time, and the counters
+can be poll()ed.
+
+When creating a new counter fd, 'perf_counter_hw_event' is:
+
+struct perf_counter_hw_event {
+ /*
+ * The MSB of the config word signifies if the rest contains cpu
+ * specific (raw) counter configuration data, if unset, the next
+ * 7 bits are an event type and the rest of the bits are the event
+ * identifier.
+ */
+ __u64 config;
+
+ __u64 irq_period;
+ __u32 record_type;
+ __u32 read_format;
+
+ __u64 disabled : 1, /* off by default */
+ inherit : 1, /* children inherit it */
+ pinned : 1, /* must always be on PMU */
+ exclusive : 1, /* only group on PMU */
+ exclude_user : 1, /* don't count user */
+ exclude_kernel : 1, /* ditto kernel */
+ exclude_hv : 1, /* ditto hypervisor */
+ exclude_idle : 1, /* don't count when idle */
+ mmap : 1, /* include mmap data */
+ munmap : 1, /* include munmap data */
+ comm : 1, /* include comm data */
+
+ __reserved_1 : 52;
+
+ __u32 extra_config_len;
+ __u32 wakeup_events; /* wakeup every n events */
+
+ __u64 __reserved_2;
+ __u64 __reserved_3;
+};
+
+The 'config' field specifies what the counter should count. It
+is divided into 3 bit-fields:
+
+raw_type: 1 bit (most significant bit) 0x8000_0000_0000_0000
+type: 7 bits (next most significant) 0x7f00_0000_0000_0000
+event_id: 56 bits (least significant) 0x00ff_ffff_ffff_ffff
+
+If 'raw_type' is 1, then the counter will count a hardware event
+specified by the remaining 63 bits of event_config. The encoding is
+machine-specific.
+
+If 'raw_type' is 0, then the 'type' field says what kind of counter
+this is, with the following encoding:
+
+enum perf_event_types {
+ PERF_TYPE_HARDWARE = 0,
+ PERF_TYPE_SOFTWARE = 1,
+ PERF_TYPE_TRACEPOINT = 2,
+};
+
+A counter of PERF_TYPE_HARDWARE will count the hardware event
+specified by 'event_id':
+
+/*
+ * Generalized performance counter event types, used by the hw_event.event_id
+ * parameter of the sys_perf_counter_open() syscall:
+ */
+enum hw_event_ids {
+ /*
+ * Common hardware events, generalized by the kernel:
+ */
+ PERF_COUNT_HW_CPU_CYCLES = 0,
+ PERF_COUNT_HW_INSTRUCTIONS = 1,
+ PERF_COUNT_HW_CACHE_REFERENCES = 2,
+ PERF_COUNT_HW_CACHE_MISSES = 3,
+ PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
+ PERF_COUNT_HW_BRANCH_MISSES = 5,
+ PERF_COUNT_HW_BUS_CYCLES = 6,
+};
+
+These are standardized types of events that work relatively uniformly
+on all CPUs that implement Performance Counters support under Linux,
+although there may be variations (e.g., different CPUs might count
+cache references and misses at different levels of the cache hierarchy).
+If a CPU is not able to count the selected event, then the system call
+will return -EINVAL.
+
+More hw_event_types are supported as well, but they are CPU-specific
+and accessed as raw events. For example, to count "External bus
+cycles while bus lock signal asserted" events on Intel Core CPUs, pass
+in a 0x4064 event_id value and set hw_event.raw_type to 1.
+
+A counter of type PERF_TYPE_SOFTWARE will count one of the available
+software events, selected by 'event_id':
+
+/*
+ * Special "software" counters provided by the kernel, even if the hardware
+ * does not support performance counters. These counters measure various
+ * physical and sw events of the kernel (and allow the profiling of them as
+ * well):
+ */
+enum sw_event_ids {
+ PERF_COUNT_SW_CPU_CLOCK = 0,
+ PERF_COUNT_SW_TASK_CLOCK = 1,
+ PERF_COUNT_SW_PAGE_FAULTS = 2,
+ PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
+ PERF_COUNT_SW_CPU_MIGRATIONS = 4,
+ PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
+ PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
+};
+
+Counters of the type PERF_TYPE_TRACEPOINT are available when the ftrace event
+tracer is available, and event_id values can be obtained from
+/debug/tracing/events/*/*/id
+
+
+Counters come in two flavours: counting counters and sampling
+counters. A "counting" counter is one that is used for counting the
+number of events that occur, and is characterised by having
+irq_period = 0.
+
+
+A read() on a counter returns the current value of the counter and possible
+additional values as specified by 'read_format', each value is a u64 (8 bytes)
+in size.
+
+/*
+ * Bits that can be set in hw_event.read_format to request that
+ * reads on the counter should return the indicated quantities,
+ * in increasing order of bit value, after the counter value.
+ */
+enum perf_counter_read_format {
+ PERF_FORMAT_TOTAL_TIME_ENABLED = 1,
+ PERF_FORMAT_TOTAL_TIME_RUNNING = 2,
+};
+
+Using these additional values one can establish the overcommit ratio for a
+particular counter allowing one to take the round-robin scheduling effect
+into account.
+
+
+A "sampling" counter is one that is set up to generate an interrupt
+every N events, where N is given by 'irq_period'. A sampling counter
+has irq_period > 0. The record_type controls what data is recorded on each
+interrupt:
+
+/*
+ * Bits that can be set in hw_event.record_type to request information
+ * in the overflow packets.
+ */
+enum perf_counter_record_format {
+ PERF_RECORD_IP = 1U << 0,
+ PERF_RECORD_TID = 1U << 1,
+ PERF_RECORD_TIME = 1U << 2,
+ PERF_RECORD_ADDR = 1U << 3,
+ PERF_RECORD_GROUP = 1U << 4,
+ PERF_RECORD_CALLCHAIN = 1U << 5,
+};
+
+Such (and other) events will be recorded in a ring-buffer, which is
+available to user-space using mmap() (see below).
+
+The 'disabled' bit specifies whether the counter starts out disabled
+or enabled. If it is initially disabled, it can be enabled by ioctl
+or prctl (see below).
+
+The 'inherit' bit, if set, specifies that this counter should count
+events on descendant tasks as well as the task specified. This only
+applies to new descendents, not to any existing descendents at the
+time the counter is created (nor to any new descendents of existing
+descendents).
+
+The 'pinned' bit, if set, specifies that the counter should always be
+on the CPU if at all possible. It only applies to hardware counters
+and only to group leaders. If a pinned counter cannot be put onto the
+CPU (e.g. because there are not enough hardware counters or because of
+a conflict with some other event), then the counter goes into an
+'error' state, where reads return end-of-file (i.e. read() returns 0)
+until the counter is subsequently enabled or disabled.
+
+The 'exclusive' bit, if set, specifies that when this counter's group
+is on the CPU, it should be the only group using the CPU's counters.
+In future, this will allow sophisticated monitoring programs to supply
+extra configuration information via 'extra_config_len' to exploit
+advanced features of the CPU's Performance Monitor Unit (PMU) that are
+not otherwise accessible and that might disrupt other hardware
+counters.
+
+The 'exclude_user', 'exclude_kernel' and 'exclude_hv' bits provide a
+way to request that counting of events be restricted to times when the
+CPU is in user, kernel and/or hypervisor mode.
+
+The 'mmap' and 'munmap' bits allow recording of PROT_EXEC mmap/munmap
+operations, these can be used to relate userspace IP addresses to actual
+code, even after the mapping (or even the whole process) is gone,
+these events are recorded in the ring-buffer (see below).
+
+The 'comm' bit allows tracking of process comm data on process creation.
+This too is recorded in the ring-buffer (see below).
+
+The 'pid' parameter to the perf_counter_open() system call allows the
+counter to be specific to a task:
+
+ pid == 0: if the pid parameter is zero, the counter is attached to the
+ current task.
+
+ pid > 0: the counter is attached to a specific task (if the current task
+ has sufficient privilege to do so)
+
+ pid < 0: all tasks are counted (per cpu counters)
+
+The 'cpu' parameter allows a counter to be made specific to a CPU:
+
+ cpu >= 0: the counter is restricted to a specific CPU
+ cpu == -1: the counter counts on all CPUs
+
+(Note: the combination of 'pid == -1' and 'cpu == -1' is not valid.)
+
+A 'pid > 0' and 'cpu == -1' counter is a per task counter that counts
+events of that task and 'follows' that task to whatever CPU the task
+gets schedule to. Per task counters can be created by any user, for
+their own tasks.
+
+A 'pid == -1' and 'cpu == x' counter is a per CPU counter that counts
+all events on CPU-x. Per CPU counters need CAP_SYS_ADMIN privilege.
+
+The 'flags' parameter is currently unused and must be zero.
+
+The 'group_fd' parameter allows counter "groups" to be set up. A
+counter group has one counter which is the group "leader". The leader
+is created first, with group_fd = -1 in the perf_counter_open call
+that creates it. The rest of the group members are created
+subsequently, with group_fd giving the fd of the group leader.
+(A single counter on its own is created with group_fd = -1 and is
+considered to be a group with only 1 member.)
+
+A counter group is scheduled onto the CPU as a unit, that is, it will
+only be put onto the CPU if all of the counters in the group can be
+put onto the CPU. This means that the values of the member counters
+can be meaningfully compared, added, divided (to get ratios), etc.,
+with each other, since they have counted events for the same set of
+executed instructions.
+
+
+Like stated, asynchronous events, like counter overflow or PROT_EXEC mmap
+tracking are logged into a ring-buffer. This ring-buffer is created and
+accessed through mmap().
+
+The mmap size should be 1+2^n pages, where the first page is a meta-data page
+(struct perf_counter_mmap_page) that contains various bits of information such
+as where the ring-buffer head is.
+
+/*
+ * Structure of the page that can be mapped via mmap
+ */
+struct perf_counter_mmap_page {
+ __u32 version; /* version number of this structure */
+ __u32 compat_version; /* lowest version this is compat with */
+
+ /*
+ * Bits needed to read the hw counters in user-space.
+ *
+ * u32 seq;
+ * s64 count;
+ *
+ * do {
+ * seq = pc->lock;
+ *
+ * barrier()
+ * if (pc->index) {
+ * count = pmc_read(pc->index - 1);
+ * count += pc->offset;
+ * } else
+ * goto regular_read;
+ *
+ * barrier();
+ * } while (pc->lock != seq);
+ *
+ * NOTE: for obvious reason this only works on self-monitoring
+ * processes.
+ */
+ __u32 lock; /* seqlock for synchronization */
+ __u32 index; /* hardware counter identifier */
+ __s64 offset; /* add to hardware counter value */
+
+ /*
+ * Control data for the mmap() data buffer.
+ *
+ * User-space reading this value should issue an rmb(), on SMP capable
+ * platforms, after reading this value -- see perf_counter_wakeup().
+ */
+ __u32 data_head; /* head in the data section */
+};
+
+NOTE: the hw-counter userspace bits are arch specific and are currently only
+ implemented on powerpc.
+
+The following 2^n pages are the ring-buffer which contains events of the form:
+
+#define PERF_EVENT_MISC_KERNEL (1 << 0)
+#define PERF_EVENT_MISC_USER (1 << 1)
+#define PERF_EVENT_MISC_OVERFLOW (1 << 2)
+
+struct perf_event_header {
+ __u32 type;
+ __u16 misc;
+ __u16 size;
+};
+
+enum perf_event_type {
+
+ /*
+ * The MMAP events record the PROT_EXEC mappings so that we can
+ * correlate userspace IPs to code. They have the following structure:
+ *
+ * struct {
+ * struct perf_event_header header;
+ *
+ * u32 pid, tid;
+ * u64 addr;
+ * u64 len;
+ * u64 pgoff;
+ * char filename[];
+ * };
+ */
+ PERF_EVENT_MMAP = 1,
+ PERF_EVENT_MUNMAP = 2,
+
+ /*
+ * struct {
+ * struct perf_event_header header;
+ *
+ * u32 pid, tid;
+ * char comm[];
+ * };
+ */
+ PERF_EVENT_COMM = 3,
+
+ /*
+ * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field
+ * will be PERF_RECORD_*
+ *
+ * struct {
+ * struct perf_event_header header;
+ *
+ * { u64 ip; } && PERF_RECORD_IP
+ * { u32 pid, tid; } && PERF_RECORD_TID
+ * { u64 time; } && PERF_RECORD_TIME
+ * { u64 addr; } && PERF_RECORD_ADDR
+ *
+ * { u64 nr;
+ * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP
+ *
+ * { u16 nr,
+ * hv,
+ * kernel,
+ * user;
+ * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN
+ * };
+ */
+};
+
+NOTE: PERF_RECORD_CALLCHAIN is arch specific and currently only implemented
+ on x86.
+
+Notification of new events is possible through poll()/select()/epoll() and
+fcntl() managing signals.
+
+Normally a notification is generated for every page filled, however one can
+additionally set perf_counter_hw_event.wakeup_events to generate one every
+so many counter overflow events.
+
+Future work will include a splice() interface to the ring-buffer.
+
+
+Counters can be enabled and disabled in two ways: via ioctl and via
+prctl. When a counter is disabled, it doesn't count or generate
+events but does continue to exist and maintain its count value.
+
+An individual counter or counter group can be enabled with
+
+ ioctl(fd, PERF_COUNTER_IOC_ENABLE);
+
+or disabled with
+
+ ioctl(fd, PERF_COUNTER_IOC_DISABLE);
+
+Enabling or disabling the leader of a group enables or disables the
+whole group; that is, while the group leader is disabled, none of the
+counters in the group will count. Enabling or disabling a member of a
+group other than the leader only affects that counter - disabling an
+non-leader stops that counter from counting but doesn't affect any
+other counter.
+
+Additionally, non-inherited overflow counters can use
+
+ ioctl(fd, PERF_COUNTER_IOC_REFRESH, nr);
+
+to enable a counter for 'nr' events, after which it gets disabled again.
+
+A process can enable or disable all the counter groups that are
+attached to it, using prctl:
+
+ prctl(PR_TASK_PERF_COUNTERS_ENABLE);
+
+ prctl(PR_TASK_PERF_COUNTERS_DISABLE);
+
+This applies to all counters on the current process, whether created
+by this process or by another, and doesn't affect any counters that
+this process has created on other processes. It only enables or
+disables the group leaders, not any other members in the groups.
+
--- /dev/null
+/*
+ * perf.c
+ *
+ * Performance analysis utility.
+ *
+ * This is the main hub from which the sub-commands (perf stat,
+ * perf top, perf record, perf report, etc.) are started.
+ */
+#include "builtin.h"
+
+#include "util/exec_cmd.h"
+#include "util/cache.h"
+#include "util/quote.h"
+#include "util/run-command.h"
+
+const char perf_usage_string[] =
+ "perf [--version] [--help] COMMAND [ARGS]";
+
+const char perf_more_info_string[] =
+ "See 'perf help COMMAND' for more information on a specific command.";
+
+static int use_pager = -1;
+struct pager_config {
+ const char *cmd;
+ int val;
+};
+
+static int pager_command_config(const char *var, const char *value, void *data)
+{
+ struct pager_config *c = data;
+ if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd))
+ c->val = perf_config_bool(var, value);
+ return 0;
+}
+
+/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
+int check_pager_config(const char *cmd)
+{
+ struct pager_config c;
+ c.cmd = cmd;
+ c.val = -1;
+ perf_config(pager_command_config, &c);
+ return c.val;
+}
+
+static void commit_pager_choice(void) {
+ switch (use_pager) {
+ case 0:
+ setenv("PERF_PAGER", "cat", 1);
+ break;
+ case 1:
+ /* setup_pager(); */
+ break;
+ default:
+ break;
+ }
+}
+
+static int handle_options(const char*** argv, int* argc, int* envchanged)
+{
+ int handled = 0;
+
+ while (*argc > 0) {
+ const char *cmd = (*argv)[0];
+ if (cmd[0] != '-')
+ break;
+
+ /*
+ * For legacy reasons, the "version" and "help"
+ * commands can be written with "--" prepended
+ * to make them look like flags.
+ */
+ if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
+ break;
+
+ /*
+ * Check remaining flags.
+ */
+ if (!prefixcmp(cmd, "--exec-path")) {
+ cmd += 11;
+ if (*cmd == '=')
+ perf_set_argv_exec_path(cmd + 1);
+ else {
+ puts(perf_exec_path());
+ exit(0);
+ }
+ } else if (!strcmp(cmd, "--html-path")) {
+ puts(system_path(PERF_HTML_PATH));
+ exit(0);
+ } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
+ use_pager = 1;
+ } else if (!strcmp(cmd, "--no-pager")) {
+ use_pager = 0;
+ if (envchanged)
+ *envchanged = 1;
+ } else if (!strcmp(cmd, "--perf-dir")) {
+ if (*argc < 2) {
+ fprintf(stderr, "No directory given for --perf-dir.\n" );
+ usage(perf_usage_string);
+ }
+ setenv(PERF_DIR_ENVIRONMENT, (*argv)[1], 1);
+ if (envchanged)
+ *envchanged = 1;
+ (*argv)++;
+ (*argc)--;
+ handled++;
+ } else if (!prefixcmp(cmd, "--perf-dir=")) {
+ setenv(PERF_DIR_ENVIRONMENT, cmd + 10, 1);
+ if (envchanged)
+ *envchanged = 1;
+ } else if (!strcmp(cmd, "--work-tree")) {
+ if (*argc < 2) {
+ fprintf(stderr, "No directory given for --work-tree.\n" );
+ usage(perf_usage_string);
+ }
+ setenv(PERF_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
+ if (envchanged)
+ *envchanged = 1;
+ (*argv)++;
+ (*argc)--;
+ } else if (!prefixcmp(cmd, "--work-tree=")) {
+ setenv(PERF_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
+ if (envchanged)
+ *envchanged = 1;
+ } else {
+ fprintf(stderr, "Unknown option: %s\n", cmd);
+ usage(perf_usage_string);
+ }
+
+ (*argv)++;
+ (*argc)--;
+ handled++;
+ }
+ return handled;
+}
+
+static int handle_alias(int *argcp, const char ***argv)
+{
+ int envchanged = 0, ret = 0, saved_errno = errno;
+ int count, option_count;
+ const char** new_argv;
+ const char *alias_command;
+ char *alias_string;
+
+ alias_command = (*argv)[0];
+ alias_string = alias_lookup(alias_command);
+ if (alias_string) {
+ if (alias_string[0] == '!') {
+ if (*argcp > 1) {
+ struct strbuf buf;
+
+ strbuf_init(&buf, PATH_MAX);
+ strbuf_addstr(&buf, alias_string);
+ sq_quote_argv(&buf, (*argv) + 1, PATH_MAX);
+ free(alias_string);
+ alias_string = buf.buf;
+ }
+ ret = system(alias_string + 1);
+ if (ret >= 0 && WIFEXITED(ret) &&
+ WEXITSTATUS(ret) != 127)
+ exit(WEXITSTATUS(ret));
+ die("Failed to run '%s' when expanding alias '%s'",
+ alias_string + 1, alias_command);
+ }
+ count = split_cmdline(alias_string, &new_argv);
+ if (count < 0)
+ die("Bad alias.%s string", alias_command);
+ option_count = handle_options(&new_argv, &count, &envchanged);
+ if (envchanged)
+ die("alias '%s' changes environment variables\n"
+ "You can use '!perf' in the alias to do this.",
+ alias_command);
+ memmove(new_argv - option_count, new_argv,
+ count * sizeof(char *));
+ new_argv -= option_count;
+
+ if (count < 1)
+ die("empty alias for %s", alias_command);
+
+ if (!strcmp(alias_command, new_argv[0]))
+ die("recursive alias: %s", alias_command);
+
+ new_argv = realloc(new_argv, sizeof(char*) *
+ (count + *argcp + 1));
+ /* insert after command name */
+ memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);
+ new_argv[count+*argcp] = NULL;
+
+ *argv = new_argv;
+ *argcp += count - 1;
+
+ ret = 1;
+ }
+
+ errno = saved_errno;
+
+ return ret;
+}
+
+const char perf_version_string[] = PERF_VERSION;
+
+#define RUN_SETUP (1<<0)
+#define USE_PAGER (1<<1)
+/*
+ * require working tree to be present -- anything uses this needs
+ * RUN_SETUP for reading from the configuration file.
+ */
+#define NEED_WORK_TREE (1<<2)
+
+struct cmd_struct {
+ const char *cmd;
+ int (*fn)(int, const char **, const char *);
+ int option;
+};
+
+static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
+{
+ int status;
+ struct stat st;
+ const char *prefix;
+
+ prefix = NULL;
+ if (p->option & RUN_SETUP)
+ prefix = NULL; /* setup_perf_directory(); */
+
+ if (use_pager == -1 && p->option & RUN_SETUP)
+ use_pager = check_pager_config(p->cmd);
+ if (use_pager == -1 && p->option & USE_PAGER)
+ use_pager = 1;
+ commit_pager_choice();
+
+ if (p->option & NEED_WORK_TREE)
+ /* setup_work_tree() */;
+
+ status = p->fn(argc, argv, prefix);
+ if (status)
+ return status & 0xff;
+
+ /* Somebody closed stdout? */
+ if (fstat(fileno(stdout), &st))
+ return 0;
+ /* Ignore write errors for pipes and sockets.. */
+ if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
+ return 0;
+
+ /* Check for ENOSPC and EIO errors.. */
+ if (fflush(stdout))
+ die("write failure on standard output: %s", strerror(errno));
+ if (ferror(stdout))
+ die("unknown write failure on standard output");
+ if (fclose(stdout))
+ die("close failed on standard output: %s", strerror(errno));
+ return 0;
+}
+
+static void handle_internal_command(int argc, const char **argv)
+{
+ const char *cmd = argv[0];
+ static struct cmd_struct commands[] = {
+ { "help", cmd_help, 0 },
+ { "list", cmd_list, 0 },
+ { "record", cmd_record, 0 },
+ { "report", cmd_report, 0 },
+ { "stat", cmd_stat, 0 },
+ { "top", cmd_top, 0 },
+ { "annotate", cmd_annotate, 0 },
+ { "version", cmd_version, 0 },
+ };
+ int i;
+ static const char ext[] = STRIP_EXTENSION;
+
+ if (sizeof(ext) > 1) {
+ i = strlen(argv[0]) - strlen(ext);
+ if (i > 0 && !strcmp(argv[0] + i, ext)) {
+ char *argv0 = strdup(argv[0]);
+ argv[0] = cmd = argv0;
+ argv0[i] = '\0';
+ }
+ }
+
+ /* Turn "perf cmd --help" into "perf help cmd" */
+ if (argc > 1 && !strcmp(argv[1], "--help")) {
+ argv[1] = argv[0];
+ argv[0] = cmd = "help";
+ }
+
+ for (i = 0; i < ARRAY_SIZE(commands); i++) {
+ struct cmd_struct *p = commands+i;
+ if (strcmp(p->cmd, cmd))
+ continue;
+ exit(run_builtin(p, argc, argv));
+ }
+}
+
+static void execv_dashed_external(const char **argv)
+{
+ struct strbuf cmd = STRBUF_INIT;
+ const char *tmp;
+ int status;
+
+ strbuf_addf(&cmd, "perf-%s", argv[0]);
+
+ /*
+ * argv[0] must be the perf command, but the argv array
+ * belongs to the caller, and may be reused in
+ * subsequent loop iterations. Save argv[0] and
+ * restore it on error.
+ */
+ tmp = argv[0];
+ argv[0] = cmd.buf;
+
+ /*
+ * if we fail because the command is not found, it is
+ * OK to return. Otherwise, we just pass along the status code.
+ */
+ status = run_command_v_opt(argv, 0);
+ if (status != -ERR_RUN_COMMAND_EXEC) {
+ if (IS_RUN_COMMAND_ERR(status))
+ die("unable to run '%s'", argv[0]);
+ exit(-status);
+ }
+ errno = ENOENT; /* as if we called execvp */
+
+ argv[0] = tmp;
+
+ strbuf_release(&cmd);
+}
+
+static int run_argv(int *argcp, const char ***argv)
+{
+ int done_alias = 0;
+
+ while (1) {
+ /* See if it's an internal command */
+ handle_internal_command(*argcp, *argv);
+
+ /* .. then try the external ones */
+ execv_dashed_external(*argv);
+
+ /* It could be an alias -- this works around the insanity
+ * of overriding "perf log" with "perf show" by having
+ * alias.log = show
+ */
+ if (done_alias || !handle_alias(argcp, argv))
+ break;
+ done_alias = 1;
+ }
+
+ return done_alias;
+}
+
+
+int main(int argc, const char **argv)
+{
+ const char *cmd;
+
+ cmd = perf_extract_argv0_path(argv[0]);
+ if (!cmd)
+ cmd = "perf-help";
+
+ /*
+ * "perf-xxxx" is the same as "perf xxxx", but we obviously:
+ *
+ * - cannot take flags in between the "perf" and the "xxxx".
+ * - cannot execute it externally (since it would just do
+ * the same thing over again)
+ *
+ * So we just directly call the internal command handler, and
+ * die if that one cannot handle it.
+ */
+ if (!prefixcmp(cmd, "perf-")) {
+ cmd += 5;
+ argv[0] = cmd;
+ handle_internal_command(argc, argv);
+ die("cannot handle %s internally", cmd);
+ }
+
+ /* Look for flags.. */
+ argv++;
+ argc--;
+ handle_options(&argv, &argc, NULL);
+ commit_pager_choice();
+ if (argc > 0) {
+ if (!prefixcmp(argv[0], "--"))
+ argv[0] += 2;
+ } else {
+ /* The user didn't specify a command; give them help */
+ printf("\n usage: %s\n\n", perf_usage_string);
+ list_common_cmds_help();
+ printf("\n %s\n\n", perf_more_info_string);
+ exit(1);
+ }
+ cmd = argv[0];
+
+ /*
+ * We use PATH to find perf commands, but we prepend some higher
+ * precidence paths: the "--exec-path" option, the PERF_EXEC_PATH
+ * environment, and the $(perfexecdir) from the Makefile at build
+ * time.
+ */
+ setup_path();
+
+ while (1) {
+ static int done_help = 0;
+ static int was_alias = 0;
+
+ was_alias = run_argv(&argc, &argv);
+ if (errno != ENOENT)
+ break;
+
+ if (was_alias) {
+ fprintf(stderr, "Expansion of alias '%s' failed; "
+ "'%s' is not a perf-command\n",
+ cmd, argv[0]);
+ exit(1);
+ }
+ if (!done_help) {
+ cmd = argv[0] = help_unknown_cmd(cmd);
+ done_help = 1;
+ } else
+ break;
+ }
+
+ fprintf(stderr, "Failed to run command '%s': %s\n",
+ cmd, strerror(errno));
+
+ return 1;
+}
--- /dev/null
+#ifndef _PERF_PERF_H
+#define _PERF_PERF_H
+
+#if defined(__x86_64__) || defined(__i386__)
+#include "../../arch/x86/include/asm/unistd.h"
+#define rmb() asm volatile("lfence" ::: "memory")
+#define cpu_relax() asm volatile("rep; nop" ::: "memory");
+#endif
+
+#ifdef __powerpc__
+#include "../../arch/powerpc/include/asm/unistd.h"
+#define rmb() asm volatile ("sync" ::: "memory")
+#define cpu_relax() asm volatile ("" ::: "memory");
+#endif
+
+#include <time.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+#include "../../include/linux/perf_counter.h"
+
+/*
+ * prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
+ * counters in the current task.
+ */
+#define PR_TASK_PERF_COUNTERS_DISABLE 31
+#define PR_TASK_PERF_COUNTERS_ENABLE 32
+
+#ifndef NSEC_PER_SEC
+# define NSEC_PER_SEC 1000000000ULL
+#endif
+
+static inline unsigned long long rdclock(void)
+{
+ struct timespec ts;
+
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
+}
+
+/*
+ * Pick up some kernel type conventions:
+ */
+#define __user
+#define asmlinkage
+
+#define unlikely(x) __builtin_expect(!!(x), 0)
+#define min(x, y) ({ \
+ typeof(x) _min1 = (x); \
+ typeof(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+
+static inline int
+sys_perf_counter_open(struct perf_counter_attr *attr_uptr,
+ pid_t pid, int cpu, int group_fd,
+ unsigned long flags)
+{
+ return syscall(__NR_perf_counter_open, attr_uptr, pid, cpu,
+ group_fd, flags);
+}
+
+#define MAX_COUNTERS 256
+#define MAX_NR_CPUS 256
+
+#endif
--- /dev/null
+#!/bin/sh
+
+GVF=PERF-VERSION-FILE
+DEF_VER=v0.0.1.PERF
+
+LF='
+'
+
+# First see if there is a version file (included in release tarballs),
+# then try git-describe, then default.
+if test -f version
+then
+ VN=$(cat version) || VN="$DEF_VER"
+elif test -d .git -o -f .git &&
+ VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
+ case "$VN" in
+ *$LF*) (exit 1) ;;
+ v[0-9]*)
+ git update-index -q --refresh
+ test -z "$(git diff-index --name-only HEAD --)" ||
+ VN="$VN-dirty" ;;
+ esac
+then
+ VN=$(echo "$VN" | sed -e 's/-/./g');
+else
+ VN="$DEF_VER"
+fi
+
+VN=$(expr "$VN" : v*'\(.*\)')
+
+if test -r $GVF
+then
+ VC=$(sed -e 's/^PERF_VERSION = //' <$GVF)
+else
+ VC=unset
+fi
+test "$VN" = "$VC" || {
+ echo >&2 "PERF_VERSION = $VN"
+ echo "PERF_VERSION = $VN" >$GVF
+}
+
+
--- /dev/null
+#include "cache.h"
+
+/*
+ * Do not use this for inspecting *tracked* content. When path is a
+ * symlink to a directory, we do not want to say it is a directory when
+ * dealing with tracked content in the working tree.
+ */
+static int is_directory(const char *path)
+{
+ struct stat st;
+ return (!stat(path, &st) && S_ISDIR(st.st_mode));
+}
+
+/* We allow "recursive" symbolic links. Only within reason, though. */
+#define MAXDEPTH 5
+
+const char *make_absolute_path(const char *path)
+{
+ static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
+ char cwd[1024] = "";
+ int buf_index = 1, len;
+
+ int depth = MAXDEPTH;
+ char *last_elem = NULL;
+ struct stat st;
+
+ if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
+ die ("Too long path: %.*s", 60, path);
+
+ while (depth--) {
+ if (!is_directory(buf)) {
+ char *last_slash = strrchr(buf, '/');
+ if (last_slash) {
+ *last_slash = '\0';
+ last_elem = xstrdup(last_slash + 1);
+ } else {
+ last_elem = xstrdup(buf);
+ *buf = '\0';
+ }
+ }
+
+ if (*buf) {
+ if (!*cwd && !getcwd(cwd, sizeof(cwd)))
+ die ("Could not get current working directory");
+
+ if (chdir(buf))
+ die ("Could not switch to '%s'", buf);
+ }
+ if (!getcwd(buf, PATH_MAX))
+ die ("Could not get current working directory");
+
+ if (last_elem) {
+ int len = strlen(buf);
+ if (len + strlen(last_elem) + 2 > PATH_MAX)
+ die ("Too long path name: '%s/%s'",
+ buf, last_elem);
+ buf[len] = '/';
+ strcpy(buf + len + 1, last_elem);
+ free(last_elem);
+ last_elem = NULL;
+ }
+
+ if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
+ len = readlink(buf, next_buf, PATH_MAX);
+ if (len < 0)
+ die ("Invalid symlink: %s", buf);
+ if (PATH_MAX <= len)
+ die("symbolic link too long: %s", buf);
+ next_buf[len] = '\0';
+ buf = next_buf;
+ buf_index = 1 - buf_index;
+ next_buf = bufs[buf_index];
+ } else
+ break;
+ }
+
+ if (*cwd && chdir(cwd))
+ die ("Could not change back to '%s'", cwd);
+
+ return buf;
+}
+
+static const char *get_pwd_cwd(void)
+{
+ static char cwd[PATH_MAX + 1];
+ char *pwd;
+ struct stat cwd_stat, pwd_stat;
+ if (getcwd(cwd, PATH_MAX) == NULL)
+ return NULL;
+ pwd = getenv("PWD");
+ if (pwd && strcmp(pwd, cwd)) {
+ stat(cwd, &cwd_stat);
+ if (!stat(pwd, &pwd_stat) &&
+ pwd_stat.st_dev == cwd_stat.st_dev &&
+ pwd_stat.st_ino == cwd_stat.st_ino) {
+ strlcpy(cwd, pwd, PATH_MAX);
+ }
+ }
+ return cwd;
+}
+
+const char *make_nonrelative_path(const char *path)
+{
+ static char buf[PATH_MAX + 1];
+
+ if (is_absolute_path(path)) {
+ if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
+ die("Too long path: %.*s", 60, path);
+ } else {
+ const char *cwd = get_pwd_cwd();
+ if (!cwd)
+ die("Cannot determine the current working directory");
+ if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX)
+ die("Too long path: %.*s", 60, path);
+ }
+ return buf;
+}
--- /dev/null
+#include "cache.h"
+
+static const char *alias_key;
+static char *alias_val;
+
+static int alias_lookup_cb(const char *k, const char *v, void *cb)
+{
+ if (!prefixcmp(k, "alias.") && !strcmp(k+6, alias_key)) {
+ if (!v)
+ return config_error_nonbool(k);
+ alias_val = strdup(v);
+ return 0;
+ }
+ return 0;
+}
+
+char *alias_lookup(const char *alias)
+{
+ alias_key = alias;
+ alias_val = NULL;
+ perf_config(alias_lookup_cb, NULL);
+ return alias_val;
+}
+
+int split_cmdline(char *cmdline, const char ***argv)
+{
+ int src, dst, count = 0, size = 16;
+ char quoted = 0;
+
+ *argv = malloc(sizeof(char*) * size);
+
+ /* split alias_string */
+ (*argv)[count++] = cmdline;
+ for (src = dst = 0; cmdline[src];) {
+ char c = cmdline[src];
+ if (!quoted && isspace(c)) {
+ cmdline[dst++] = 0;
+ while (cmdline[++src]
+ && isspace(cmdline[src]))
+ ; /* skip */
+ if (count >= size) {
+ size += 16;
+ *argv = realloc(*argv, sizeof(char*) * size);
+ }
+ (*argv)[count++] = cmdline + dst;
+ } else if (!quoted && (c == '\'' || c == '"')) {
+ quoted = c;
+ src++;
+ } else if (c == quoted) {
+ quoted = 0;
+ src++;
+ } else {
+ if (c == '\\' && quoted != '\'') {
+ src++;
+ c = cmdline[src];
+ if (!c) {
+ free(*argv);
+ *argv = NULL;
+ return error("cmdline ends with \\");
+ }
+ }
+ cmdline[dst++] = c;
+ src++;
+ }
+ }
+
+ cmdline[dst] = 0;
+
+ if (quoted) {
+ free(*argv);
+ *argv = NULL;
+ return error("unclosed quote");
+ }
+
+ return count;
+}
+
--- /dev/null
+#ifndef CACHE_H
+#define CACHE_H
+
+#include "util.h"
+#include "strbuf.h"
+
+#define PERF_DIR_ENVIRONMENT "PERF_DIR"
+#define PERF_WORK_TREE_ENVIRONMENT "PERF_WORK_TREE"
+#define DEFAULT_PERF_DIR_ENVIRONMENT ".perf"
+#define DB_ENVIRONMENT "PERF_OBJECT_DIRECTORY"
+#define INDEX_ENVIRONMENT "PERF_INDEX_FILE"
+#define GRAFT_ENVIRONMENT "PERF_GRAFT_FILE"
+#define TEMPLATE_DIR_ENVIRONMENT "PERF_TEMPLATE_DIR"
+#define CONFIG_ENVIRONMENT "PERF_CONFIG"
+#define EXEC_PATH_ENVIRONMENT "PERF_EXEC_PATH"
+#define CEILING_DIRECTORIES_ENVIRONMENT "PERF_CEILING_DIRECTORIES"
+#define PERFATTRIBUTES_FILE ".perfattributes"
+#define INFOATTRIBUTES_FILE "info/attributes"
+#define ATTRIBUTE_MACRO_PREFIX "[attr]"
+
+typedef int (*config_fn_t)(const char *, const char *, void *);
+extern int perf_default_config(const char *, const char *, void *);
+extern int perf_config_from_file(config_fn_t fn, const char *, void *);
+extern int perf_config(config_fn_t fn, void *);
+extern int perf_parse_ulong(const char *, unsigned long *);
+extern int perf_config_int(const char *, const char *);
+extern unsigned long perf_config_ulong(const char *, const char *);
+extern int perf_config_bool_or_int(const char *, const char *, int *);
+extern int perf_config_bool(const char *, const char *);
+extern int perf_config_string(const char **, const char *, const char *);
+extern int perf_config_set(const char *, const char *);
+extern int perf_config_set_multivar(const char *, const char *, const char *, int);
+extern int perf_config_rename_section(const char *, const char *);
+extern const char *perf_etc_perfconfig(void);
+extern int check_repository_format_version(const char *var, const char *value, void *cb);
+extern int perf_config_system(void);
+extern int perf_config_global(void);
+extern int config_error_nonbool(const char *);
+extern const char *config_exclusive_filename;
+
+#define MAX_PERFNAME (1000)
+extern char perf_default_email[MAX_PERFNAME];
+extern char perf_default_name[MAX_PERFNAME];
+extern int user_ident_explicitly_given;
+
+extern const char *perf_log_output_encoding;
+extern const char *perf_mailmap_file;
+
+/* IO helper functions */
+extern void maybe_flush_or_die(FILE *, const char *);
+extern int copy_fd(int ifd, int ofd);
+extern int copy_file(const char *dst, const char *src, int mode);
+extern ssize_t read_in_full(int fd, void *buf, size_t count);
+extern ssize_t write_in_full(int fd, const void *buf, size_t count);
+extern void write_or_die(int fd, const void *buf, size_t count);
+extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
+extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
+extern void fsync_or_die(int fd, const char *);
+
+/* pager.c */
+extern void setup_pager(void);
+extern const char *pager_program;
+extern int pager_in_use(void);
+extern int pager_use_color;
+
+extern const char *editor_program;
+extern const char *excludes_file;
+
+char *alias_lookup(const char *alias);
+int split_cmdline(char *cmdline, const char ***argv);
+
+#define alloc_nr(x) (((x)+16)*3/2)
+
+/*
+ * Realloc the buffer pointed at by variable 'x' so that it can hold
+ * at least 'nr' entries; the number of entries currently allocated
+ * is 'alloc', using the standard growing factor alloc_nr() macro.
+ *
+ * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
+ */
+#define ALLOC_GROW(x, nr, alloc) \
+ do { \
+ if ((nr) > alloc) { \
+ if (alloc_nr(alloc) < (nr)) \
+ alloc = (nr); \
+ else \
+ alloc = alloc_nr(alloc); \
+ x = xrealloc((x), alloc * sizeof(*(x))); \
+ } \
+ } while(0)
+
+
+static inline int is_absolute_path(const char *path)
+{
+ return path[0] == '/';
+}
+
+const char *make_absolute_path(const char *path);
+const char *make_nonrelative_path(const char *path);
+const char *make_relative_path(const char *abs, const char *base);
+int normalize_path_copy(char *dst, const char *src);
+int longest_ancestor_length(const char *path, const char *prefix_list);
+char *strip_path_suffix(const char *path, const char *suffix);
+
+extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
+extern char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
+/* perf_mkstemp() - create tmp file honoring TMPDIR variable */
+extern int perf_mkstemp(char *path, size_t len, const char *template);
+
+extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
+ __attribute__((format (printf, 3, 4)));
+extern char *perf_snpath(char *buf, size_t n, const char *fmt, ...)
+ __attribute__((format (printf, 3, 4)));
+extern char *perf_pathdup(const char *fmt, ...)
+ __attribute__((format (printf, 1, 2)));
+
+extern size_t strlcpy(char *dest, const char *src, size_t size);
+
+#endif /* CACHE_H */
--- /dev/null
+#include "cache.h"
+#include "color.h"
+
+int perf_use_color_default = -1;
+
+static int parse_color(const char *name, int len)
+{
+ static const char * const color_names[] = {
+ "normal", "black", "red", "green", "yellow",
+ "blue", "magenta", "cyan", "white"
+ };
+ char *end;
+ int i;
+ for (i = 0; i < ARRAY_SIZE(color_names); i++) {
+ const char *str = color_names[i];
+ if (!strncasecmp(name, str, len) && !str[len])
+ return i - 1;
+ }
+ i = strtol(name, &end, 10);
+ if (end - name == len && i >= -1 && i <= 255)
+ return i;
+ return -2;
+}
+
+static int parse_attr(const char *name, int len)
+{
+ static const int attr_values[] = { 1, 2, 4, 5, 7 };
+ static const char * const attr_names[] = {
+ "bold", "dim", "ul", "blink", "reverse"
+ };
+ int i;
+ for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
+ const char *str = attr_names[i];
+ if (!strncasecmp(name, str, len) && !str[len])
+ return attr_values[i];
+ }
+ return -1;
+}
+
+void color_parse(const char *value, const char *var, char *dst)
+{
+ color_parse_mem(value, strlen(value), var, dst);
+}
+
+void color_parse_mem(const char *value, int value_len, const char *var,
+ char *dst)
+{
+ const char *ptr = value;
+ int len = value_len;
+ int attr = -1;
+ int fg = -2;
+ int bg = -2;
+
+ if (!strncasecmp(value, "reset", len)) {
+ strcpy(dst, PERF_COLOR_RESET);
+ return;
+ }
+
+ /* [fg [bg]] [attr] */
+ while (len > 0) {
+ const char *word = ptr;
+ int val, wordlen = 0;
+
+ while (len > 0 && !isspace(word[wordlen])) {
+ wordlen++;
+ len--;
+ }
+
+ ptr = word + wordlen;
+ while (len > 0 && isspace(*ptr)) {
+ ptr++;
+ len--;
+ }
+
+ val = parse_color(word, wordlen);
+ if (val >= -1) {
+ if (fg == -2) {
+ fg = val;
+ continue;
+ }
+ if (bg == -2) {
+ bg = val;
+ continue;
+ }
+ goto bad;
+ }
+ val = parse_attr(word, wordlen);
+ if (val < 0 || attr != -1)
+ goto bad;
+ attr = val;
+ }
+
+ if (attr >= 0 || fg >= 0 || bg >= 0) {
+ int sep = 0;
+
+ *dst++ = '\033';
+ *dst++ = '[';
+ if (attr >= 0) {
+ *dst++ = '0' + attr;
+ sep++;
+ }
+ if (fg >= 0) {
+ if (sep++)
+ *dst++ = ';';
+ if (fg < 8) {
+ *dst++ = '3';
+ *dst++ = '0' + fg;
+ } else {
+ dst += sprintf(dst, "38;5;%d", fg);
+ }
+ }
+ if (bg >= 0) {
+ if (sep++)
+ *dst++ = ';';
+ if (bg < 8) {
+ *dst++ = '4';
+ *dst++ = '0' + bg;
+ } else {
+ dst += sprintf(dst, "48;5;%d", bg);
+ }
+ }
+ *dst++ = 'm';
+ }
+ *dst = 0;
+ return;
+bad:
+ die("bad color value '%.*s' for variable '%s'", value_len, value, var);
+}
+
+int perf_config_colorbool(const char *var, const char *value, int stdout_is_tty)
+{
+ if (value) {
+ if (!strcasecmp(value, "never"))
+ return 0;
+ if (!strcasecmp(value, "always"))
+ return 1;
+ if (!strcasecmp(value, "auto"))
+ goto auto_color;
+ }
+
+ /* Missing or explicit false to turn off colorization */
+ if (!perf_config_bool(var, value))
+ return 0;
+
+ /* any normal truth value defaults to 'auto' */
+ auto_color:
+ if (stdout_is_tty < 0)
+ stdout_is_tty = isatty(1);
+ if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
+ char *term = getenv("TERM");
+ if (term && strcmp(term, "dumb"))
+ return 1;
+ }
+ return 0;
+}
+
+int perf_color_default_config(const char *var, const char *value, void *cb)
+{
+ if (!strcmp(var, "color.ui")) {
+ perf_use_color_default = perf_config_colorbool(var, value, -1);
+ return 0;
+ }
+
+ return perf_default_config(var, value, cb);
+}
+
+static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
+ va_list args, const char *trail)
+{
+ int r = 0;
+
+ /*
+ * Auto-detect:
+ */
+ if (perf_use_color_default < 0) {
+ if (isatty(1) || pager_in_use())
+ perf_use_color_default = 1;
+ else
+ perf_use_color_default = 0;
+ }
+
+ if (perf_use_color_default && *color)
+ r += fprintf(fp, "%s", color);
+ r += vfprintf(fp, fmt, args);
+ if (perf_use_color_default && *color)
+ r += fprintf(fp, "%s", PERF_COLOR_RESET);
+ if (trail)
+ r += fprintf(fp, "%s", trail);
+ return r;
+}
+
+
+
+int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
+{
+ va_list args;
+ int r;
+
+ va_start(args, fmt);
+ r = color_vfprintf(fp, color, fmt, args, NULL);
+ va_end(args);
+ return r;
+}
+
+int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
+{
+ va_list args;
+ int r;
+ va_start(args, fmt);
+ r = color_vfprintf(fp, color, fmt, args, "\n");
+ va_end(args);
+ return r;
+}
+
+/*
+ * This function splits the buffer by newlines and colors the lines individually.
+ *
+ * Returns 0 on success.
+ */
+int color_fwrite_lines(FILE *fp, const char *color,
+ size_t count, const char *buf)
+{
+ if (!*color)
+ return fwrite(buf, count, 1, fp) != 1;
+ while (count) {
+ char *p = memchr(buf, '\n', count);
+ if (p != buf && (fputs(color, fp) < 0 ||
+ fwrite(buf, p ? p - buf : count, 1, fp) != 1 ||
+ fputs(PERF_COLOR_RESET, fp) < 0))
+ return -1;
+ if (!p)
+ return 0;
+ if (fputc('\n', fp) < 0)
+ return -1;
+ count -= p + 1 - buf;
+ buf = p + 1;
+ }
+ return 0;
+}
+
+
--- /dev/null
+#ifndef COLOR_H
+#define COLOR_H
+
+/* "\033[1;38;5;2xx;48;5;2xxm\0" is 23 bytes */
+#define COLOR_MAXLEN 24
+
+#define PERF_COLOR_NORMAL ""
+#define PERF_COLOR_RESET "\033[m"
+#define PERF_COLOR_BOLD "\033[1m"
+#define PERF_COLOR_RED "\033[31m"
+#define PERF_COLOR_GREEN "\033[32m"
+#define PERF_COLOR_YELLOW "\033[33m"
+#define PERF_COLOR_BLUE "\033[34m"
+#define PERF_COLOR_MAGENTA "\033[35m"
+#define PERF_COLOR_CYAN "\033[36m"
+#define PERF_COLOR_BG_RED "\033[41m"
+
+/*
+ * This variable stores the value of color.ui
+ */
+extern int perf_use_color_default;
+
+
+/*
+ * Use this instead of perf_default_config if you need the value of color.ui.
+ */
+int perf_color_default_config(const char *var, const char *value, void *cb);
+
+int perf_config_colorbool(const char *var, const char *value, int stdout_is_tty);
+void color_parse(const char *value, const char *var, char *dst);
+void color_parse_mem(const char *value, int len, const char *var, char *dst);
+int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
+int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
+int color_fwrite_lines(FILE *fp, const char *color, size_t count, const char *buf);
+
+#endif /* COLOR_H */
--- /dev/null
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ * Copyright (C) Johannes Schindelin, 2005
+ *
+ */
+#include "util.h"
+#include "cache.h"
+#include "exec_cmd.h"
+
+#define MAXNAME (256)
+
+static FILE *config_file;
+static const char *config_file_name;
+static int config_linenr;
+static int config_file_eof;
+
+const char *config_exclusive_filename = NULL;
+
+static int get_next_char(void)
+{
+ int c;
+ FILE *f;
+
+ c = '\n';
+ if ((f = config_file) != NULL) {
+ c = fgetc(f);
+ if (c == '\r') {
+ /* DOS like systems */
+ c = fgetc(f);
+ if (c != '\n') {
+ ungetc(c, f);
+ c = '\r';
+ }
+ }
+ if (c == '\n')
+ config_linenr++;
+ if (c == EOF) {
+ config_file_eof = 1;
+ c = '\n';
+ }
+ }
+ return c;
+}
+
+static char *parse_value(void)
+{
+ static char value[1024];
+ int quote = 0, comment = 0, len = 0, space = 0;
+
+ for (;;) {
+ int c = get_next_char();
+ if (len >= sizeof(value) - 1)
+ return NULL;
+ if (c == '\n') {
+ if (quote)
+ return NULL;
+ value[len] = 0;
+ return value;
+ }
+ if (comment)
+ continue;
+ if (isspace(c) && !quote) {
+ space = 1;
+ continue;
+ }
+ if (!quote) {
+ if (c == ';' || c == '#') {
+ comment = 1;
+ continue;
+ }
+ }
+ if (space) {
+ if (len)
+ value[len++] = ' ';
+ space = 0;
+ }
+ if (c == '\\') {
+ c = get_next_char();
+ switch (c) {
+ case '\n':
+ continue;
+ case 't':
+ c = '\t';
+ break;
+ case 'b':
+ c = '\b';
+ break;
+ case 'n':
+ c = '\n';
+ break;
+ /* Some characters escape as themselves */
+ case '\\': case '"':
+ break;
+ /* Reject unknown escape sequences */
+ default:
+ return NULL;
+ }
+ value[len++] = c;
+ continue;
+ }
+ if (c == '"') {
+ quote = 1-quote;
+ continue;
+ }
+ value[len++] = c;
+ }
+}
+
+static inline int iskeychar(int c)
+{
+ return isalnum(c) || c == '-';
+}
+
+static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
+{
+ int c;
+ char *value;
+
+ /* Get the full name */
+ for (;;) {
+ c = get_next_char();
+ if (config_file_eof)
+ break;
+ if (!iskeychar(c))
+ break;
+ name[len++] = tolower(c);
+ if (len >= MAXNAME)
+ return -1;
+ }
+ name[len] = 0;
+ while (c == ' ' || c == '\t')
+ c = get_next_char();
+
+ value = NULL;
+ if (c != '\n') {
+ if (c != '=')
+ return -1;
+ value = parse_value();
+ if (!value)
+ return -1;
+ }
+ return fn(name, value, data);
+}
+
+static int get_extended_base_var(char *name, int baselen, int c)
+{
+ do {
+ if (c == '\n')
+ return -1;
+ c = get_next_char();
+ } while (isspace(c));
+
+ /* We require the format to be '[base "extension"]' */
+ if (c != '"')
+ return -1;
+ name[baselen++] = '.';
+
+ for (;;) {
+ int c = get_next_char();
+ if (c == '\n')
+ return -1;
+ if (c == '"')
+ break;
+ if (c == '\\') {
+ c = get_next_char();
+ if (c == '\n')
+ return -1;
+ }
+ name[baselen++] = c;
+ if (baselen > MAXNAME / 2)
+ return -1;
+ }
+
+ /* Final ']' */
+ if (get_next_char() != ']')
+ return -1;
+ return baselen;
+}
+
+static int get_base_var(char *name)
+{
+ int baselen = 0;
+
+ for (;;) {
+ int c = get_next_char();
+ if (config_file_eof)
+ return -1;
+ if (c == ']')
+ return baselen;
+ if (isspace(c))
+ return get_extended_base_var(name, baselen, c);
+ if (!iskeychar(c) && c != '.')
+ return -1;
+ if (baselen > MAXNAME / 2)
+ return -1;
+ name[baselen++] = tolower(c);
+ }
+}
+
+static int perf_parse_file(config_fn_t fn, void *data)
+{
+ int comment = 0;
+ int baselen = 0;
+ static char var[MAXNAME];
+
+ /* U+FEFF Byte Order Mark in UTF8 */
+ static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
+ const unsigned char *bomptr = utf8_bom;
+
+ for (;;) {
+ int c = get_next_char();
+ if (bomptr && *bomptr) {
+ /* We are at the file beginning; skip UTF8-encoded BOM
+ * if present. Sane editors won't put this in on their
+ * own, but e.g. Windows Notepad will do it happily. */
+ if ((unsigned char) c == *bomptr) {
+ bomptr++;
+ continue;
+ } else {
+ /* Do not tolerate partial BOM. */
+ if (bomptr != utf8_bom)
+ break;
+ /* No BOM at file beginning. Cool. */
+ bomptr = NULL;
+ }
+ }
+ if (c == '\n') {
+ if (config_file_eof)
+ return 0;
+ comment = 0;
+ continue;
+ }
+ if (comment || isspace(c))
+ continue;
+ if (c == '#' || c == ';') {
+ comment = 1;
+ continue;
+ }
+ if (c == '[') {
+ baselen = get_base_var(var);
+ if (baselen <= 0)
+ break;
+ var[baselen++] = '.';
+ var[baselen] = 0;
+ continue;
+ }
+ if (!isalpha(c))
+ break;
+ var[baselen] = tolower(c);
+ if (get_value(fn, data, var, baselen+1) < 0)
+ break;
+ }
+ die("bad config file line %d in %s", config_linenr, config_file_name);
+}
+
+static int parse_unit_factor(const char *end, unsigned long *val)
+{
+ if (!*end)
+ return 1;
+ else if (!strcasecmp(end, "k")) {
+ *val *= 1024;
+ return 1;
+ }
+ else if (!strcasecmp(end, "m")) {
+ *val *= 1024 * 1024;
+ return 1;
+ }
+ else if (!strcasecmp(end, "g")) {
+ *val *= 1024 * 1024 * 1024;
+ return 1;
+ }
+ return 0;
+}
+
+static int perf_parse_long(const char *value, long *ret)
+{
+ if (value && *value) {
+ char *end;
+ long val = strtol(value, &end, 0);
+ unsigned long factor = 1;
+ if (!parse_unit_factor(end, &factor))
+ return 0;
+ *ret = val * factor;
+ return 1;
+ }
+ return 0;
+}
+
+int perf_parse_ulong(const char *value, unsigned long *ret)
+{
+ if (value && *value) {
+ char *end;
+ unsigned long val = strtoul(value, &end, 0);
+ if (!parse_unit_factor(end, &val))
+ return 0;
+ *ret = val;
+ return 1;
+ }
+ return 0;
+}
+
+static void die_bad_config(const char *name)
+{
+ if (config_file_name)
+ die("bad config value for '%s' in %s", name, config_file_name);
+ die("bad config value for '%s'", name);
+}
+
+int perf_config_int(const char *name, const char *value)
+{
+ long ret = 0;
+ if (!perf_parse_long(value, &ret))
+ die_bad_config(name);
+ return ret;
+}
+
+unsigned long perf_config_ulong(const char *name, const char *value)
+{
+ unsigned long ret;
+ if (!perf_parse_ulong(value, &ret))
+ die_bad_config(name);
+ return ret;
+}
+
+int perf_config_bool_or_int(const char *name, const char *value, int *is_bool)
+{
+ *is_bool = 1;
+ if (!value)
+ return 1;
+ if (!*value)
+ return 0;
+ if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on"))
+ return 1;
+ if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off"))
+ return 0;
+ *is_bool = 0;
+ return perf_config_int(name, value);
+}
+
+int perf_config_bool(const char *name, const char *value)
+{
+ int discard;
+ return !!perf_config_bool_or_int(name, value, &discard);
+}
+
+int perf_config_string(const char **dest, const char *var, const char *value)
+{
+ if (!value)
+ return config_error_nonbool(var);
+ *dest = strdup(value);
+ return 0;
+}
+
+static int perf_default_core_config(const char *var, const char *value)
+{
+ /* Add other config variables here and to Documentation/config.txt. */
+ return 0;
+}
+
+int perf_default_config(const char *var, const char *value, void *dummy)
+{
+ if (!prefixcmp(var, "core."))
+ return perf_default_core_config(var, value);
+
+ /* Add other config variables here and to Documentation/config.txt. */
+ return 0;
+}
+
+int perf_config_from_file(config_fn_t fn, const char *filename, void *data)
+{
+ int ret;
+ FILE *f = fopen(filename, "r");
+
+ ret = -1;
+ if (f) {
+ config_file = f;
+ config_file_name = filename;
+ config_linenr = 1;
+ config_file_eof = 0;
+ ret = perf_parse_file(fn, data);
+ fclose(f);
+ config_file_name = NULL;
+ }
+ return ret;
+}
+
+const char *perf_etc_perfconfig(void)
+{
+ static const char *system_wide;
+ if (!system_wide)
+ system_wide = system_path(ETC_PERFCONFIG);
+ return system_wide;
+}
+
+static int perf_env_bool(const char *k, int def)
+{
+ const char *v = getenv(k);
+ return v ? perf_config_bool(k, v) : def;
+}
+
+int perf_config_system(void)
+{
+ return !perf_env_bool("PERF_CONFIG_NOSYSTEM", 0);
+}
+
+int perf_config_global(void)
+{
+ return !perf_env_bool("PERF_CONFIG_NOGLOBAL", 0);
+}
+
+int perf_config(config_fn_t fn, void *data)
+{
+ int ret = 0, found = 0;
+ char *repo_config = NULL;
+ const char *home = NULL;
+
+ /* Setting $PERF_CONFIG makes perf read _only_ the given config file. */
+ if (config_exclusive_filename)
+ return perf_config_from_file(fn, config_exclusive_filename, data);
+ if (perf_config_system() && !access(perf_etc_perfconfig(), R_OK)) {
+ ret += perf_config_from_file(fn, perf_etc_perfconfig(),
+ data);
+ found += 1;
+ }
+
+ home = getenv("HOME");
+ if (perf_config_global() && home) {
+ char *user_config = strdup(mkpath("%s/.perfconfig", home));
+ if (!access(user_config, R_OK)) {
+ ret += perf_config_from_file(fn, user_config, data);
+ found += 1;
+ }
+ free(user_config);
+ }
+
+ repo_config = perf_pathdup("config");
+ if (!access(repo_config, R_OK)) {
+ ret += perf_config_from_file(fn, repo_config, data);
+ found += 1;
+ }
+ free(repo_config);
+ if (found == 0)
+ return -1;
+ return ret;
+}
+
+/*
+ * Find all the stuff for perf_config_set() below.
+ */
+
+#define MAX_MATCHES 512
+
+static struct {
+ int baselen;
+ char* key;
+ int do_not_match;
+ regex_t* value_regex;
+ int multi_replace;
+ size_t offset[MAX_MATCHES];
+ enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
+ int seen;
+} store;
+
+static int matches(const char* key, const char* value)
+{
+ return !strcmp(key, store.key) &&
+ (store.value_regex == NULL ||
+ (store.do_not_match ^
+ !regexec(store.value_regex, value, 0, NULL, 0)));
+}
+
+static int store_aux(const char* key, const char* value, void *cb)
+{
+ const char *ep;
+ size_t section_len;
+
+ switch (store.state) {
+ case KEY_SEEN:
+ if (matches(key, value)) {
+ if (store.seen == 1 && store.multi_replace == 0) {
+ warning("%s has multiple values", key);
+ } else if (store.seen >= MAX_MATCHES) {
+ error("too many matches for %s", key);
+ return 1;
+ }
+
+ store.offset[store.seen] = ftell(config_file);
+ store.seen++;
+ }
+ break;
+ case SECTION_SEEN:
+ /*
+ * What we are looking for is in store.key (both
+ * section and var), and its section part is baselen
+ * long. We found key (again, both section and var).
+ * We would want to know if this key is in the same
+ * section as what we are looking for. We already
+ * know we are in the same section as what should
+ * hold store.key.
+ */
+ ep = strrchr(key, '.');
+ section_len = ep - key;
+
+ if ((section_len != store.baselen) ||
+ memcmp(key, store.key, section_len+1)) {
+ store.state = SECTION_END_SEEN;
+ break;
+ }
+
+ /*
+ * Do not increment matches: this is no match, but we
+ * just made sure we are in the desired section.
+ */
+ store.offset[store.seen] = ftell(config_file);
+ /* fallthru */
+ case SECTION_END_SEEN:
+ case START:
+ if (matches(key, value)) {
+ store.offset[store.seen] = ftell(config_file);
+ store.state = KEY_SEEN;
+ store.seen++;
+ } else {
+ if (strrchr(key, '.') - key == store.baselen &&
+ !strncmp(key, store.key, store.baselen)) {
+ store.state = SECTION_SEEN;
+ store.offset[store.seen] = ftell(config_file);
+ }
+ }
+ }
+ return 0;
+}
+
+static int store_write_section(int fd, const char* key)
+{
+ const char *dot;
+ int i, success;
+ struct strbuf sb = STRBUF_INIT;
+
+ dot = memchr(key, '.', store.baselen);
+ if (dot) {
+ strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
+ for (i = dot - key + 1; i < store.baselen; i++) {
+ if (key[i] == '"' || key[i] == '\\')
+ strbuf_addch(&sb, '\\');
+ strbuf_addch(&sb, key[i]);
+ }
+ strbuf_addstr(&sb, "\"]\n");
+ } else {
+ strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
+ }
+
+ success = write_in_full(fd, sb.buf, sb.len) == sb.len;
+ strbuf_release(&sb);
+
+ return success;
+}
+
+static int store_write_pair(int fd, const char* key, const char* value)
+{
+ int i, success;
+ int length = strlen(key + store.baselen + 1);
+ const char *quote = "";
+ struct strbuf sb = STRBUF_INIT;
+
+ /*
+ * Check to see if the value needs to be surrounded with a dq pair.
+ * Note that problematic characters are always backslash-quoted; this
+ * check is about not losing leading or trailing SP and strings that
+ * follow beginning-of-comment characters (i.e. ';' and '#') by the
+ * configuration parser.
+ */
+ if (value[0] == ' ')
+ quote = "\"";
+ for (i = 0; value[i]; i++)
+ if (value[i] == ';' || value[i] == '#')
+ quote = "\"";
+ if (i && value[i - 1] == ' ')
+ quote = "\"";
+
+ strbuf_addf(&sb, "\t%.*s = %s",
+ length, key + store.baselen + 1, quote);
+
+ for (i = 0; value[i]; i++)
+ switch (value[i]) {
+ case '\n':
+ strbuf_addstr(&sb, "\\n");
+ break;
+ case '\t':
+ strbuf_addstr(&sb, "\\t");
+ break;
+ case '"':
+ case '\\':
+ strbuf_addch(&sb, '\\');
+ default:
+ strbuf_addch(&sb, value[i]);
+ break;
+ }
+ strbuf_addf(&sb, "%s\n", quote);
+
+ success = write_in_full(fd, sb.buf, sb.len) == sb.len;
+ strbuf_release(&sb);
+
+ return success;
+}
+
+static ssize_t find_beginning_of_line(const char* contents, size_t size,
+ size_t offset_, int* found_bracket)
+{
+ size_t equal_offset = size, bracket_offset = size;
+ ssize_t offset;
+
+contline:
+ for (offset = offset_-2; offset > 0
+ && contents[offset] != '\n'; offset--)
+ switch (contents[offset]) {
+ case '=': equal_offset = offset; break;
+ case ']': bracket_offset = offset; break;
+ }
+ if (offset > 0 && contents[offset-1] == '\\') {
+ offset_ = offset;
+ goto contline;
+ }
+ if (bracket_offset < equal_offset) {
+ *found_bracket = 1;
+ offset = bracket_offset+1;
+ } else
+ offset++;
+
+ return offset;
+}
+
+int perf_config_set(const char* key, const char* value)
+{
+ return perf_config_set_multivar(key, value, NULL, 0);
+}
+
+/*
+ * If value==NULL, unset in (remove from) config,
+ * if value_regex!=NULL, disregard key/value pairs where value does not match.
+ * if multi_replace==0, nothing, or only one matching key/value is replaced,
+ * else all matching key/values (regardless how many) are removed,
+ * before the new pair is written.
+ *
+ * Returns 0 on success.
+ *
+ * This function does this:
+ *
+ * - it locks the config file by creating ".perf/config.lock"
+ *
+ * - it then parses the config using store_aux() as validator to find
+ * the position on the key/value pair to replace. If it is to be unset,
+ * it must be found exactly once.
+ *
+ * - the config file is mmap()ed and the part before the match (if any) is
+ * written to the lock file, then the changed part and the rest.
+ *
+ * - the config file is removed and the lock file rename()d to it.
+ *
+ */
+int perf_config_set_multivar(const char* key, const char* value,
+ const char* value_regex, int multi_replace)
+{
+ int i, dot;
+ int fd = -1, in_fd;
+ int ret = 0;
+ char* config_filename;
+ const char* last_dot = strrchr(key, '.');
+
+ if (config_exclusive_filename)
+ config_filename = strdup(config_exclusive_filename);
+ else
+ config_filename = perf_pathdup("config");
+
+ /*
+ * Since "key" actually contains the section name and the real
+ * key name separated by a dot, we have to know where the dot is.
+ */
+
+ if (last_dot == NULL) {
+ error("key does not contain a section: %s", key);
+ ret = 2;
+ goto out_free;
+ }
+ store.baselen = last_dot - key;
+
+ store.multi_replace = multi_replace;
+
+ /*
+ * Validate the key and while at it, lower case it for matching.
+ */
+ store.key = malloc(strlen(key) + 1);
+ dot = 0;
+ for (i = 0; key[i]; i++) {
+ unsigned char c = key[i];
+ if (c == '.')
+ dot = 1;
+ /* Leave the extended basename untouched.. */
+ if (!dot || i > store.baselen) {
+ if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
+ error("invalid key: %s", key);
+ free(store.key);
+ ret = 1;
+ goto out_free;
+ }
+ c = tolower(c);
+ } else if (c == '\n') {
+ error("invalid key (newline): %s", key);
+ free(store.key);
+ ret = 1;
+ goto out_free;
+ }
+ store.key[i] = c;
+ }
+ store.key[i] = 0;
+
+ /*
+ * If .perf/config does not exist yet, write a minimal version.
+ */
+ in_fd = open(config_filename, O_RDONLY);
+ if ( in_fd < 0 ) {
+ free(store.key);
+
+ if ( ENOENT != errno ) {
+ error("opening %s: %s", config_filename,
+ strerror(errno));
+ ret = 3; /* same as "invalid config file" */
+ goto out_free;
+ }
+ /* if nothing to unset, error out */
+ if (value == NULL) {
+ ret = 5;
+ goto out_free;
+ }
+
+ store.key = (char*)key;
+ if (!store_write_section(fd, key) ||
+ !store_write_pair(fd, key, value))
+ goto write_err_out;
+ } else {
+ struct stat st;
+ char* contents;
+ size_t contents_sz, copy_begin, copy_end;
+ int i, new_line = 0;
+
+ if (value_regex == NULL)
+ store.value_regex = NULL;
+ else {
+ if (value_regex[0] == '!') {
+ store.do_not_match = 1;
+ value_regex++;
+ } else
+ store.do_not_match = 0;
+
+ store.value_regex = (regex_t*)malloc(sizeof(regex_t));
+ if (regcomp(store.value_regex, value_regex,
+ REG_EXTENDED)) {
+ error("invalid pattern: %s", value_regex);
+ free(store.value_regex);
+ ret = 6;
+ goto out_free;
+ }
+ }
+
+ store.offset[0] = 0;
+ store.state = START;
+ store.seen = 0;
+
+ /*
+ * After this, store.offset will contain the *end* offset
+ * of the last match, or remain at 0 if no match was found.
+ * As a side effect, we make sure to transform only a valid
+ * existing config file.
+ */
+ if (perf_config_from_file(store_aux, config_filename, NULL)) {
+ error("invalid config file %s", config_filename);
+ free(store.key);
+ if (store.value_regex != NULL) {
+ regfree(store.value_regex);
+ free(store.value_regex);
+ }
+ ret = 3;
+ goto out_free;
+ }
+
+ free(store.key);
+ if (store.value_regex != NULL) {
+ regfree(store.value_regex);
+ free(store.value_regex);
+ }
+
+ /* if nothing to unset, or too many matches, error out */
+ if ((store.seen == 0 && value == NULL) ||
+ (store.seen > 1 && multi_replace == 0)) {
+ ret = 5;
+ goto out_free;
+ }
+
+ fstat(in_fd, &st);
+ contents_sz = xsize_t(st.st_size);
+ contents = mmap(NULL, contents_sz, PROT_READ,
+ MAP_PRIVATE, in_fd, 0);
+ close(in_fd);
+
+ if (store.seen == 0)
+ store.seen = 1;
+
+ for (i = 0, copy_begin = 0; i < store.seen; i++) {
+ if (store.offset[i] == 0) {
+ store.offset[i] = copy_end = contents_sz;
+ } else if (store.state != KEY_SEEN) {
+ copy_end = store.offset[i];
+ } else
+ copy_end = find_beginning_of_line(
+ contents, contents_sz,
+ store.offset[i]-2, &new_line);
+
+ if (copy_end > 0 && contents[copy_end-1] != '\n')
+ new_line = 1;
+
+ /* write the first part of the config */
+ if (copy_end > copy_begin) {
+ if (write_in_full(fd, contents + copy_begin,
+ copy_end - copy_begin) <
+ copy_end - copy_begin)
+ goto write_err_out;
+ if (new_line &&
+ write_in_full(fd, "\n", 1) != 1)
+ goto write_err_out;
+ }
+ copy_begin = store.offset[i];
+ }
+
+ /* write the pair (value == NULL means unset) */
+ if (value != NULL) {
+ if (store.state == START) {
+ if (!store_write_section(fd, key))
+ goto write_err_out;
+ }
+ if (!store_write_pair(fd, key, value))
+ goto write_err_out;
+ }
+
+ /* write the rest of the config */
+ if (copy_begin < contents_sz)
+ if (write_in_full(fd, contents + copy_begin,
+ contents_sz - copy_begin) <
+ contents_sz - copy_begin)
+ goto write_err_out;
+
+ munmap(contents, contents_sz);
+ }
+
+ ret = 0;
+
+out_free:
+ free(config_filename);
+ return ret;
+
+write_err_out:
+ goto out_free;
+
+}
+
+/*
+ * Call this to report error for your variable that should not
+ * get a boolean value (i.e. "[my] var" means "true").
+ */
+int config_error_nonbool(const char *var)
+{
+ return error("Missing value for '%s'", var);
+}
--- /dev/null
+/*
+ * Sane locale-independent, ASCII ctype.
+ *
+ * No surprises, and works with signed and unsigned chars.
+ */
+#include "cache.h"
+
+enum {
+ S = GIT_SPACE,
+ A = GIT_ALPHA,
+ D = GIT_DIGIT,
+ G = GIT_GLOB_SPECIAL, /* *, ?, [, \\ */
+ R = GIT_REGEX_SPECIAL, /* $, (, ), +, ., ^, {, | * */
+};
+
+unsigned char sane_ctype[256] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, S, S, 0, 0, S, 0, 0, /* 0.. 15 */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 16.. 31 */
+ S, 0, 0, 0, R, 0, 0, 0, R, R, G, R, 0, 0, R, 0, /* 32.. 47 */
+ D, D, D, D, D, D, D, D, D, D, 0, 0, 0, 0, 0, G, /* 48.. 63 */
+ 0, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, /* 64.. 79 */
+ A, A, A, A, A, A, A, A, A, A, A, G, G, 0, R, 0, /* 80.. 95 */
+ 0, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, /* 96..111 */
+ A, A, A, A, A, A, A, A, A, A, A, R, R, 0, 0, 0, /* 112..127 */
+ /* Nothing in the 128.. range */
+};
--- /dev/null
+/*
+ * We put all the perf config variables in this same object
+ * file, so that programs can link against the config parser
+ * without having to link against all the rest of perf.
+ */
+#include "cache.h"
+
+const char *pager_program;
+int pager_use_color = 1;
--- /dev/null
+#include "cache.h"
+#include "exec_cmd.h"
+#include "quote.h"
+#define MAX_ARGS 32
+
+extern char **environ;
+static const char *argv_exec_path;
+static const char *argv0_path;
+
+const char *system_path(const char *path)
+{
+#ifdef RUNTIME_PREFIX
+ static const char *prefix;
+#else
+ static const char *prefix = PREFIX;
+#endif
+ struct strbuf d = STRBUF_INIT;
+
+ if (is_absolute_path(path))
+ return path;
+
+#ifdef RUNTIME_PREFIX
+ assert(argv0_path);
+ assert(is_absolute_path(argv0_path));
+
+ if (!prefix &&
+ !(prefix = strip_path_suffix(argv0_path, PERF_EXEC_PATH)) &&
+ !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
+ !(prefix = strip_path_suffix(argv0_path, "perf"))) {
+ prefix = PREFIX;
+ fprintf(stderr, "RUNTIME_PREFIX requested, "
+ "but prefix computation failed. "
+ "Using static fallback '%s'.\n", prefix);
+ }
+#endif
+
+ strbuf_addf(&d, "%s/%s", prefix, path);
+ path = strbuf_detach(&d, NULL);
+ return path;
+}
+
+const char *perf_extract_argv0_path(const char *argv0)
+{
+ const char *slash;
+
+ if (!argv0 || !*argv0)
+ return NULL;
+ slash = argv0 + strlen(argv0);
+
+ while (argv0 <= slash && !is_dir_sep(*slash))
+ slash--;
+
+ if (slash >= argv0) {
+ argv0_path = strndup(argv0, slash - argv0);
+ return slash + 1;
+ }
+
+ return argv0;
+}
+
+void perf_set_argv_exec_path(const char *exec_path)
+{
+ argv_exec_path = exec_path;
+ /*
+ * Propagate this setting to external programs.
+ */
+ setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
+}
+
+
+/* Returns the highest-priority, location to look for perf programs. */
+const char *perf_exec_path(void)
+{
+ const char *env;
+
+ if (argv_exec_path)
+ return argv_exec_path;
+
+ env = getenv(EXEC_PATH_ENVIRONMENT);
+ if (env && *env) {
+ return env;
+ }
+
+ return system_path(PERF_EXEC_PATH);
+}
+
+static void add_path(struct strbuf *out, const char *path)
+{
+ if (path && *path) {
+ if (is_absolute_path(path))
+ strbuf_addstr(out, path);
+ else
+ strbuf_addstr(out, make_nonrelative_path(path));
+
+ strbuf_addch(out, PATH_SEP);
+ }
+}
+
+void setup_path(void)
+{
+ const char *old_path = getenv("PATH");
+ struct strbuf new_path = STRBUF_INIT;
+
+ add_path(&new_path, perf_exec_path());
+ add_path(&new_path, argv0_path);
+
+ if (old_path)
+ strbuf_addstr(&new_path, old_path);
+ else
+ strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
+
+ setenv("PATH", new_path.buf, 1);
+
+ strbuf_release(&new_path);
+}
+
+const char **prepare_perf_cmd(const char **argv)
+{
+ int argc;
+ const char **nargv;
+
+ for (argc = 0; argv[argc]; argc++)
+ ; /* just counting */
+ nargv = malloc(sizeof(*nargv) * (argc + 2));
+
+ nargv[0] = "perf";
+ for (argc = 0; argv[argc]; argc++)
+ nargv[argc + 1] = argv[argc];
+ nargv[argc + 1] = NULL;
+ return nargv;
+}
+
+int execv_perf_cmd(const char **argv) {
+ const char **nargv = prepare_perf_cmd(argv);
+
+ /* execvp() can only ever return if it fails */
+ execvp("perf", (char **)nargv);
+
+ free(nargv);
+ return -1;
+}
+
+
+int execl_perf_cmd(const char *cmd,...)
+{
+ int argc;
+ const char *argv[MAX_ARGS + 1];
+ const char *arg;
+ va_list param;
+
+ va_start(param, cmd);
+ argv[0] = cmd;
+ argc = 1;
+ while (argc < MAX_ARGS) {
+ arg = argv[argc++] = va_arg(param, char *);
+ if (!arg)
+ break;
+ }
+ va_end(param);
+ if (MAX_ARGS <= argc)
+ return error("too many args to run %s", cmd);
+
+ argv[argc] = NULL;
+ return execv_perf_cmd(argv);
+}
--- /dev/null
+#ifndef PERF_EXEC_CMD_H
+#define PERF_EXEC_CMD_H
+
+extern void perf_set_argv_exec_path(const char *exec_path);
+extern const char *perf_extract_argv0_path(const char *path);
+extern const char *perf_exec_path(void);
+extern void setup_path(void);
+extern const char **prepare_perf_cmd(const char **argv);
+extern int execv_perf_cmd(const char **argv); /* NULL terminated */
+extern int execl_perf_cmd(const char *cmd, ...);
+extern const char *system_path(const char *path);
+
+#endif /* PERF_EXEC_CMD_H */
--- /dev/null
+#!/bin/sh
+
+echo "/* Automatically generated by $0 */
+struct cmdname_help
+{
+ char name[16];
+ char help[80];
+};
+
+static struct cmdname_help common_cmds[] = {"
+
+sed -n -e 's/^perf-\([^ ]*\)[ ].* common.*/\1/p' command-list.txt |
+sort |
+while read cmd
+do
+ sed -n '
+ /^NAME/,/perf-'"$cmd"'/H
+ ${
+ x
+ s/.*perf-'"$cmd"' - \(.*\)/ {"'"$cmd"'", "\1"},/
+ p
+ }' "Documentation/perf-$cmd.txt"
+done
+echo "};"
--- /dev/null
+#include "cache.h"
+#include "../builtin.h"
+#include "exec_cmd.h"
+#include "levenshtein.h"
+#include "help.h"
+
+/* most GUI terminals set COLUMNS (although some don't export it) */
+static int term_columns(void)
+{
+ char *col_string = getenv("COLUMNS");
+ int n_cols;
+
+ if (col_string && (n_cols = atoi(col_string)) > 0)
+ return n_cols;
+
+#ifdef TIOCGWINSZ
+ {
+ struct winsize ws;
+ if (!ioctl(1, TIOCGWINSZ, &ws)) {
+ if (ws.ws_col)
+ return ws.ws_col;
+ }
+ }
+#endif
+
+ return 80;
+}
+
+void add_cmdname(struct cmdnames *cmds, const char *name, int len)
+{
+ struct cmdname *ent = malloc(sizeof(*ent) + len + 1);
+
+ ent->len = len;
+ memcpy(ent->name, name, len);
+ ent->name[len] = 0;
+
+ ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc);
+ cmds->names[cmds->cnt++] = ent;
+}
+
+static void clean_cmdnames(struct cmdnames *cmds)
+{
+ int i;
+ for (i = 0; i < cmds->cnt; ++i)
+ free(cmds->names[i]);
+ free(cmds->names);
+ cmds->cnt = 0;
+ cmds->alloc = 0;
+}
+
+static int cmdname_compare(const void *a_, const void *b_)
+{
+ struct cmdname *a = *(struct cmdname **)a_;
+ struct cmdname *b = *(struct cmdname **)b_;
+ return strcmp(a->name, b->name);
+}
+
+static void uniq(struct cmdnames *cmds)
+{
+ int i, j;
+
+ if (!cmds->cnt)
+ return;
+
+ for (i = j = 1; i < cmds->cnt; i++)
+ if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
+ cmds->names[j++] = cmds->names[i];
+
+ cmds->cnt = j;
+}
+
+void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
+{
+ int ci, cj, ei;
+ int cmp;
+
+ ci = cj = ei = 0;
+ while (ci < cmds->cnt && ei < excludes->cnt) {
+ cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);
+ if (cmp < 0)
+ cmds->names[cj++] = cmds->names[ci++];
+ else if (cmp == 0)
+ ci++, ei++;
+ else if (cmp > 0)
+ ei++;
+ }
+
+ while (ci < cmds->cnt)
+ cmds->names[cj++] = cmds->names[ci++];
+
+ cmds->cnt = cj;
+}
+
+static void pretty_print_string_list(struct cmdnames *cmds, int longest)
+{
+ int cols = 1, rows;
+ int space = longest + 1; /* min 1 SP between words */
+ int max_cols = term_columns() - 1; /* don't print *on* the edge */
+ int i, j;
+
+ if (space < max_cols)
+ cols = max_cols / space;
+ rows = (cmds->cnt + cols - 1) / cols;
+
+ for (i = 0; i < rows; i++) {
+ printf(" ");
+
+ for (j = 0; j < cols; j++) {
+ int n = j * rows + i;
+ int size = space;
+ if (n >= cmds->cnt)
+ break;
+ if (j == cols-1 || n + rows >= cmds->cnt)
+ size = 1;
+ printf("%-*s", size, cmds->names[n]->name);
+ }
+ putchar('\n');
+ }
+}
+
+static int is_executable(const char *name)
+{
+ struct stat st;
+
+ if (stat(name, &st) || /* stat, not lstat */
+ !S_ISREG(st.st_mode))
+ return 0;
+
+#ifdef __MINGW32__
+ /* cannot trust the executable bit, peek into the file instead */
+ char buf[3] = { 0 };
+ int n;
+ int fd = open(name, O_RDONLY);
+ st.st_mode &= ~S_IXUSR;
+ if (fd >= 0) {
+ n = read(fd, buf, 2);
+ if (n == 2)
+ /* DOS executables start with "MZ" */
+ if (!strcmp(buf, "#!") || !strcmp(buf, "MZ"))
+ st.st_mode |= S_IXUSR;
+ close(fd);
+ }
+#endif
+ return st.st_mode & S_IXUSR;
+}
+
+static void list_commands_in_dir(struct cmdnames *cmds,
+ const char *path,
+ const char *prefix)
+{
+ int prefix_len;
+ DIR *dir = opendir(path);
+ struct dirent *de;
+ struct strbuf buf = STRBUF_INIT;
+ int len;
+
+ if (!dir)
+ return;
+ if (!prefix)
+ prefix = "perf-";
+ prefix_len = strlen(prefix);
+
+ strbuf_addf(&buf, "%s/", path);
+ len = buf.len;
+
+ while ((de = readdir(dir)) != NULL) {
+ int entlen;
+
+ if (prefixcmp(de->d_name, prefix))
+ continue;
+
+ strbuf_setlen(&buf, len);
+ strbuf_addstr(&buf, de->d_name);
+ if (!is_executable(buf.buf))
+ continue;
+
+ entlen = strlen(de->d_name) - prefix_len;
+ if (has_extension(de->d_name, ".exe"))
+ entlen -= 4;
+
+ add_cmdname(cmds, de->d_name + prefix_len, entlen);
+ }
+ closedir(dir);
+ strbuf_release(&buf);
+}
+
+void load_command_list(const char *prefix,
+ struct cmdnames *main_cmds,
+ struct cmdnames *other_cmds)
+{
+ const char *env_path = getenv("PATH");
+ const char *exec_path = perf_exec_path();
+
+ if (exec_path) {
+ list_commands_in_dir(main_cmds, exec_path, prefix);
+ qsort(main_cmds->names, main_cmds->cnt,
+ sizeof(*main_cmds->names), cmdname_compare);
+ uniq(main_cmds);
+ }
+
+ if (env_path) {
+ char *paths, *path, *colon;
+ path = paths = strdup(env_path);
+ while (1) {
+ if ((colon = strchr(path, PATH_SEP)))
+ *colon = 0;
+ if (!exec_path || strcmp(path, exec_path))
+ list_commands_in_dir(other_cmds, path, prefix);
+
+ if (!colon)
+ break;
+ path = colon + 1;
+ }
+ free(paths);
+
+ qsort(other_cmds->names, other_cmds->cnt,
+ sizeof(*other_cmds->names), cmdname_compare);
+ uniq(other_cmds);
+ }
+ exclude_cmds(other_cmds, main_cmds);
+}
+
+void list_commands(const char *title, struct cmdnames *main_cmds,
+ struct cmdnames *other_cmds)
+{
+ int i, longest = 0;
+
+ for (i = 0; i < main_cmds->cnt; i++)
+ if (longest < main_cmds->names[i]->len)
+ longest = main_cmds->names[i]->len;
+ for (i = 0; i < other_cmds->cnt; i++)
+ if (longest < other_cmds->names[i]->len)
+ longest = other_cmds->names[i]->len;
+
+ if (main_cmds->cnt) {
+ const char *exec_path = perf_exec_path();
+ printf("available %s in '%s'\n", title, exec_path);
+ printf("----------------");
+ mput_char('-', strlen(title) + strlen(exec_path));
+ putchar('\n');
+ pretty_print_string_list(main_cmds, longest);
+ putchar('\n');
+ }
+
+ if (other_cmds->cnt) {
+ printf("%s available from elsewhere on your $PATH\n", title);
+ printf("---------------------------------------");
+ mput_char('-', strlen(title));
+ putchar('\n');
+ pretty_print_string_list(other_cmds, longest);
+ putchar('\n');
+ }
+}
+
+int is_in_cmdlist(struct cmdnames *c, const char *s)
+{
+ int i;
+ for (i = 0; i < c->cnt; i++)
+ if (!strcmp(s, c->names[i]->name))
+ return 1;
+ return 0;
+}
+
+static int autocorrect;
+static struct cmdnames aliases;
+
+static int perf_unknown_cmd_config(const char *var, const char *value, void *cb)
+{
+ if (!strcmp(var, "help.autocorrect"))
+ autocorrect = perf_config_int(var,value);
+ /* Also use aliases for command lookup */
+ if (!prefixcmp(var, "alias."))
+ add_cmdname(&aliases, var + 6, strlen(var + 6));
+
+ return perf_default_config(var, value, cb);
+}
+
+static int levenshtein_compare(const void *p1, const void *p2)
+{
+ const struct cmdname *const *c1 = p1, *const *c2 = p2;
+ const char *s1 = (*c1)->name, *s2 = (*c2)->name;
+ int l1 = (*c1)->len;
+ int l2 = (*c2)->len;
+ return l1 != l2 ? l1 - l2 : strcmp(s1, s2);
+}
+
+static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old)
+{
+ int i;
+ ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc);
+
+ for (i = 0; i < old->cnt; i++)
+ cmds->names[cmds->cnt++] = old->names[i];
+ free(old->names);
+ old->cnt = 0;
+ old->names = NULL;
+}
+
+const char *help_unknown_cmd(const char *cmd)
+{
+ int i, n = 0, best_similarity = 0;
+ struct cmdnames main_cmds, other_cmds;
+
+ memset(&main_cmds, 0, sizeof(main_cmds));
+ memset(&other_cmds, 0, sizeof(main_cmds));
+ memset(&aliases, 0, sizeof(aliases));
+
+ perf_config(perf_unknown_cmd_config, NULL);
+
+ load_command_list("perf-", &main_cmds, &other_cmds);
+
+ add_cmd_list(&main_cmds, &aliases);
+ add_cmd_list(&main_cmds, &other_cmds);
+ qsort(main_cmds.names, main_cmds.cnt,
+ sizeof(main_cmds.names), cmdname_compare);
+ uniq(&main_cmds);
+
+ if (main_cmds.cnt) {
+ /* This reuses cmdname->len for similarity index */
+ for (i = 0; i < main_cmds.cnt; ++i)
+ main_cmds.names[i]->len =
+ levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4);
+
+ qsort(main_cmds.names, main_cmds.cnt,
+ sizeof(*main_cmds.names), levenshtein_compare);
+
+ best_similarity = main_cmds.names[0]->len;
+ n = 1;
+ while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len)
+ ++n;
+ }
+
+ if (autocorrect && n == 1) {
+ const char *assumed = main_cmds.names[0]->name;
+
+ main_cmds.names[0] = NULL;
+ clean_cmdnames(&main_cmds);
+ fprintf(stderr, "WARNING: You called a Git program named '%s', "
+ "which does not exist.\n"
+ "Continuing under the assumption that you meant '%s'\n",
+ cmd, assumed);
+ if (autocorrect > 0) {
+ fprintf(stderr, "in %0.1f seconds automatically...\n",
+ (float)autocorrect/10.0);
+ poll(NULL, 0, autocorrect * 100);
+ }
+ return assumed;
+ }
+
+ fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd);
+
+ if (main_cmds.cnt && best_similarity < 6) {
+ fprintf(stderr, "\nDid you mean %s?\n",
+ n < 2 ? "this": "one of these");
+
+ for (i = 0; i < n; i++)
+ fprintf(stderr, "\t%s\n", main_cmds.names[i]->name);
+ }
+
+ exit(1);
+}
+
+int cmd_version(int argc, const char **argv, const char *prefix)
+{
+ printf("perf version %s\n", perf_version_string);
+ return 0;
+}
--- /dev/null
+#ifndef HELP_H
+#define HELP_H
+
+struct cmdnames {
+ int alloc;
+ int cnt;
+ struct cmdname {
+ size_t len; /* also used for similarity index in help.c */
+ char name[FLEX_ARRAY];
+ } **names;
+};
+
+static inline void mput_char(char c, unsigned int num)
+{
+ while(num--)
+ putchar(c);
+}
+
+void load_command_list(const char *prefix,
+ struct cmdnames *main_cmds,
+ struct cmdnames *other_cmds);
+void add_cmdname(struct cmdnames *cmds, const char *name, int len);
+/* Here we require that excludes is a sorted list. */
+void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes);
+int is_in_cmdlist(struct cmdnames *c, const char *s);
+void list_commands(const char *title, struct cmdnames *main_cmds,
+ struct cmdnames *other_cmds);
+
+#endif /* HELP_H */
--- /dev/null
+#include "cache.h"
+#include "levenshtein.h"
+
+/*
+ * This function implements the Damerau-Levenshtein algorithm to
+ * calculate a distance between strings.
+ *
+ * Basically, it says how many letters need to be swapped, substituted,
+ * deleted from, or added to string1, at least, to get string2.
+ *
+ * The idea is to build a distance matrix for the substrings of both
+ * strings. To avoid a large space complexity, only the last three rows
+ * are kept in memory (if swaps had the same or higher cost as one deletion
+ * plus one insertion, only two rows would be needed).
+ *
+ * At any stage, "i + 1" denotes the length of the current substring of
+ * string1 that the distance is calculated for.
+ *
+ * row2 holds the current row, row1 the previous row (i.e. for the substring
+ * of string1 of length "i"), and row0 the row before that.
+ *
+ * In other words, at the start of the big loop, row2[j + 1] contains the
+ * Damerau-Levenshtein distance between the substring of string1 of length
+ * "i" and the substring of string2 of length "j + 1".
+ *
+ * All the big loop does is determine the partial minimum-cost paths.
+ *
+ * It does so by calculating the costs of the path ending in characters
+ * i (in string1) and j (in string2), respectively, given that the last
+ * operation is a substition, a swap, a deletion, or an insertion.
+ *
+ * This implementation allows the costs to be weighted:
+ *
+ * - w (as in "sWap")
+ * - s (as in "Substitution")
+ * - a (for insertion, AKA "Add")
+ * - d (as in "Deletion")
+ *
+ * Note that this algorithm calculates a distance _iff_ d == a.
+ */
+int levenshtein(const char *string1, const char *string2,
+ int w, int s, int a, int d)
+{
+ int len1 = strlen(string1), len2 = strlen(string2);
+ int *row0 = malloc(sizeof(int) * (len2 + 1));
+ int *row1 = malloc(sizeof(int) * (len2 + 1));
+ int *row2 = malloc(sizeof(int) * (len2 + 1));
+ int i, j;
+
+ for (j = 0; j <= len2; j++)
+ row1[j] = j * a;
+ for (i = 0; i < len1; i++) {
+ int *dummy;
+
+ row2[0] = (i + 1) * d;
+ for (j = 0; j < len2; j++) {
+ /* substitution */
+ row2[j + 1] = row1[j] + s * (string1[i] != string2[j]);
+ /* swap */
+ if (i > 0 && j > 0 && string1[i - 1] == string2[j] &&
+ string1[i] == string2[j - 1] &&
+ row2[j + 1] > row0[j - 1] + w)
+ row2[j + 1] = row0[j - 1] + w;
+ /* deletion */
+ if (row2[j + 1] > row1[j + 1] + d)
+ row2[j + 1] = row1[j + 1] + d;
+ /* insertion */
+ if (row2[j + 1] > row2[j] + a)
+ row2[j + 1] = row2[j] + a;
+ }
+
+ dummy = row0;
+ row0 = row1;
+ row1 = row2;
+ row2 = dummy;
+ }
+
+ i = row1[len2];
+ free(row0);
+ free(row1);
+ free(row2);
+
+ return i;
+}
--- /dev/null
+#ifndef LEVENSHTEIN_H
+#define LEVENSHTEIN_H
+
+int levenshtein(const char *string1, const char *string2,
+ int swap_penalty, int substition_penalty,
+ int insertion_penalty, int deletion_penalty);
+
+#endif
--- /dev/null
+#ifndef _LINUX_LIST_H
+#define _LINUX_LIST_H
+/*
+ Copyright (C) Cast of dozens, comes from the Linux kernel
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of version 2 of the GNU General Public License as
+ published by the Free Software Foundation.
+*/
+
+#include <stddef.h>
+
+/*
+ * These are non-NULL pointers that will result in page faults
+ * under normal circumstances, used to verify that nobody uses
+ * non-initialized list entries.
+ */
+#define LIST_POISON1 ((void *)0x00100100)
+#define LIST_POISON2 ((void *)0x00200200)
+
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr: the pointer to the member.
+ * @type: the type of the container struct this is embedded in.
+ * @member: the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+
+/*
+ * Simple doubly linked list implementation.
+ *
+ * Some of the internal functions ("__xxx") are useful when
+ * manipulating whole lists rather than single entries, as
+ * sometimes we already know the next/prev entries and we can
+ * generate better code by using them directly rather than
+ * using the generic single-entry routines.
+ */
+
+struct list_head {
+ struct list_head *next, *prev;
+};
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) \
+ struct list_head name = LIST_HEAD_INIT(name)
+
+static inline void INIT_LIST_HEAD(struct list_head *list)
+{
+ list->next = list;
+ list->prev = list;
+}
+
+/*
+ * Insert a new entry between two known consecutive entries.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_add(struct list_head *new,
+ struct list_head *prev,
+ struct list_head *next)
+{
+ next->prev = new;
+ new->next = next;
+ new->prev = prev;
+ prev->next = new;
+}
+
+/**
+ * list_add - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it after
+ *
+ * Insert a new entry after the specified head.
+ * This is good for implementing stacks.
+ */
+static inline void list_add(struct list_head *new, struct list_head *head)
+{
+ __list_add(new, head, head->next);
+}
+
+/**
+ * list_add_tail - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it before
+ *
+ * Insert a new entry before the specified head.
+ * This is useful for implementing queues.
+ */
+static inline void list_add_tail(struct list_head *new, struct list_head *head)
+{
+ __list_add(new, head->prev, head);
+}
+
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_del(struct list_head * prev, struct list_head * next)
+{
+ next->prev = prev;
+ prev->next = next;
+}
+
+/**
+ * list_del - deletes entry from list.
+ * @entry: the element to delete from the list.
+ * Note: list_empty on entry does not return true after this, the entry is
+ * in an undefined state.
+ */
+static inline void list_del(struct list_head *entry)
+{
+ __list_del(entry->prev, entry->next);
+ entry->next = LIST_POISON1;
+ entry->prev = LIST_POISON2;
+}
+
+/**
+ * list_del_range - deletes range of entries from list.
+ * @beging: first element in the range to delete from the list.
+ * @beging: first element in the range to delete from the list.
+ * Note: list_empty on the range of entries does not return true after this,
+ * the entries is in an undefined state.
+ */
+static inline void list_del_range(struct list_head *begin,
+ struct list_head *end)
+{
+ begin->prev->next = end->next;
+ end->next->prev = begin->prev;
+}
+
+/**
+ * list_replace - replace old entry by new one
+ * @old : the element to be replaced
+ * @new : the new element to insert
+ * Note: if 'old' was empty, it will be overwritten.
+ */
+static inline void list_replace(struct list_head *old,
+ struct list_head *new)
+{
+ new->next = old->next;
+ new->next->prev = new;
+ new->prev = old->prev;
+ new->prev->next = new;
+}
+
+static inline void list_replace_init(struct list_head *old,
+ struct list_head *new)
+{
+ list_replace(old, new);
+ INIT_LIST_HEAD(old);
+}
+
+/**
+ * list_del_init - deletes entry from list and reinitialize it.
+ * @entry: the element to delete from the list.
+ */
+static inline void list_del_init(struct list_head *entry)
+{
+ __list_del(entry->prev, entry->next);
+ INIT_LIST_HEAD(entry);
+}
+
+/**
+ * list_move - delete from one list and add as another's head
+ * @list: the entry to move
+ * @head: the head that will precede our entry
+ */
+static inline void list_move(struct list_head *list, struct list_head *head)
+{
+ __list_del(list->prev, list->next);
+ list_add(list, head);
+}
+
+/**
+ * list_move_tail - delete from one list and add as another's tail
+ * @list: the entry to move
+ * @head: the head that will follow our entry
+ */
+static inline void list_move_tail(struct list_head *list,
+ struct list_head *head)
+{
+ __list_del(list->prev, list->next);
+ list_add_tail(list, head);
+}
+
+/**
+ * list_is_last - tests whether @list is the last entry in list @head
+ * @list: the entry to test
+ * @head: the head of the list
+ */
+static inline int list_is_last(const struct list_head *list,
+ const struct list_head *head)
+{
+ return list->next == head;
+}
+
+/**
+ * list_empty - tests whether a list is empty
+ * @head: the list to test.
+ */
+static inline int list_empty(const struct list_head *head)
+{
+ return head->next == head;
+}
+
+/**
+ * list_empty_careful - tests whether a list is empty and not being modified
+ * @head: the list to test
+ *
+ * Description:
+ * tests whether a list is empty _and_ checks that no other CPU might be
+ * in the process of modifying either member (next or prev)
+ *
+ * NOTE: using list_empty_careful() without synchronization
+ * can only be safe if the only activity that can happen
+ * to the list entry is list_del_init(). Eg. it cannot be used
+ * if another CPU could re-list_add() it.
+ */
+static inline int list_empty_careful(const struct list_head *head)
+{
+ struct list_head *next = head->next;
+ return (next == head) && (next == head->prev);
+}
+
+static inline void __list_splice(struct list_head *list,
+ struct list_head *head)
+{
+ struct list_head *first = list->next;
+ struct list_head *last = list->prev;
+ struct list_head *at = head->next;
+
+ first->prev = head;
+ head->next = first;
+
+ last->next = at;
+ at->prev = last;
+}
+
+/**
+ * list_splice - join two lists
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ */
+static inline void list_splice(struct list_head *list, struct list_head *head)
+{
+ if (!list_empty(list))
+ __list_splice(list, head);
+}
+
+/**
+ * list_splice_init - join two lists and reinitialise the emptied list.
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ *
+ * The list at @list is reinitialised
+ */
+static inline void list_splice_init(struct list_head *list,
+ struct list_head *head)
+{
+ if (!list_empty(list)) {
+ __list_splice(list, head);
+ INIT_LIST_HEAD(list);
+ }
+}
+
+/**
+ * list_entry - get the struct for this entry
+ * @ptr: the &struct list_head pointer.
+ * @type: the type of the struct this is embedded in.
+ * @member: the name of the list_struct within the struct.
+ */
+#define list_entry(ptr, type, member) \
+ container_of(ptr, type, member)
+
+/**
+ * list_first_entry - get the first element from a list
+ * @ptr: the list head to take the element from.
+ * @type: the type of the struct this is embedded in.
+ * @member: the name of the list_struct within the struct.
+ *
+ * Note, that list is expected to be not empty.
+ */
+#define list_first_entry(ptr, type, member) \
+ list_entry((ptr)->next, type, member)
+
+/**
+ * list_for_each - iterate over a list
+ * @pos: the &struct list_head to use as a loop cursor.
+ * @head: the head for your list.
+ */
+#define list_for_each(pos, head) \
+ for (pos = (head)->next; pos != (head); \
+ pos = pos->next)
+
+/**
+ * __list_for_each - iterate over a list
+ * @pos: the &struct list_head to use as a loop cursor.
+ * @head: the head for your list.
+ *
+ * This variant differs from list_for_each() in that it's the
+ * simplest possible list iteration code, no prefetching is done.
+ * Use this for code that knows the list to be very short (empty
+ * or 1 entry) most of the time.
+ */
+#define __list_for_each(pos, head) \
+ for (pos = (head)->next; pos != (head); pos = pos->next)
+
+/**
+ * list_for_each_prev - iterate over a list backwards
+ * @pos: the &struct list_head to use as a loop cursor.
+ * @head: the head for your list.
+ */
+#define list_for_each_prev(pos, head) \
+ for (pos = (head)->prev; pos != (head); \
+ pos = pos->prev)
+
+/**
+ * list_for_each_safe - iterate over a list safe against removal of list entry
+ * @pos: the &struct list_head to use as a loop cursor.
+ * @n: another &struct list_head to use as temporary storage
+ * @head: the head for your list.
+ */
+#define list_for_each_safe(pos, n, head) \
+ for (pos = (head)->next, n = pos->next; pos != (head); \
+ pos = n, n = pos->next)
+
+/**
+ * list_for_each_entry - iterate over list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ */
+#define list_for_each_entry(pos, head, member) \
+ for (pos = list_entry((head)->next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_reverse - iterate backwards over list of given type.
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_reverse(pos, head, member) \
+ for (pos = list_entry((head)->prev, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = list_entry(pos->member.prev, typeof(*pos), member))
+
+/**
+ * list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue
+ * @pos: the type * to use as a start point
+ * @head: the head of the list
+ * @member: the name of the list_struct within the struct.
+ *
+ * Prepares a pos entry for use as a start point in list_for_each_entry_continue.
+ */
+#define list_prepare_entry(pos, head, member) \
+ ((pos) ? : list_entry(head, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_continue - continue iteration over list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ *
+ * Continue to iterate over list of given type, continuing after
+ * the current position.
+ */
+#define list_for_each_entry_continue(pos, head, member) \
+ for (pos = list_entry(pos->member.next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_from - iterate over list of given type from the current point
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ *
+ * Iterate over list of given type, continuing from current position.
+ */
+#define list_for_each_entry_from(pos, head, member) \
+ for (; &pos->member != (head); \
+ pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos: the type * to use as a loop cursor.
+ * @n: another type * to use as temporary storage
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_safe(pos, n, head, member) \
+ for (pos = list_entry((head)->next, typeof(*pos), member), \
+ n = list_entry(pos->member.next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_for_each_entry_safe_continue
+ * @pos: the type * to use as a loop cursor.
+ * @n: another type * to use as temporary storage
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ *
+ * Iterate over list of given type, continuing after current point,
+ * safe against removal of list entry.
+ */
+#define list_for_each_entry_safe_continue(pos, n, head, member) \
+ for (pos = list_entry(pos->member.next, typeof(*pos), member), \
+ n = list_entry(pos->member.next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_for_each_entry_safe_from
+ * @pos: the type * to use as a loop cursor.
+ * @n: another type * to use as temporary storage
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ *
+ * Iterate over list of given type from current point, safe against
+ * removal of list entry.
+ */
+#define list_for_each_entry_safe_from(pos, n, head, member) \
+ for (n = list_entry(pos->member.next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_for_each_entry_safe_reverse
+ * @pos: the type * to use as a loop cursor.
+ * @n: another type * to use as temporary storage
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ *
+ * Iterate backwards over list of given type, safe against removal
+ * of list entry.
+ */
+#define list_for_each_entry_safe_reverse(pos, n, head, member) \
+ for (pos = list_entry((head)->prev, typeof(*pos), member), \
+ n = list_entry(pos->member.prev, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = n, n = list_entry(n->member.prev, typeof(*n), member))
+
+/*
+ * Double linked lists with a single pointer list head.
+ * Mostly useful for hash tables where the two pointer list head is
+ * too wasteful.
+ * You lose the ability to access the tail in O(1).
+ */
+
+struct hlist_head {
+ struct hlist_node *first;
+};
+
+struct hlist_node {
+ struct hlist_node *next, **pprev;
+};
+
+#define HLIST_HEAD_INIT { .first = NULL }
+#define HLIST_HEAD(name) struct hlist_head name = { .first = NULL }
+#define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL)
+static inline void INIT_HLIST_NODE(struct hlist_node *h)
+{
+ h->next = NULL;
+ h->pprev = NULL;
+}
+
+static inline int hlist_unhashed(const struct hlist_node *h)
+{
+ return !h->pprev;
+}
+
+static inline int hlist_empty(const struct hlist_head *h)
+{
+ return !h->first;
+}
+
+static inline void __hlist_del(struct hlist_node *n)
+{
+ struct hlist_node *next = n->next;
+ struct hlist_node **pprev = n->pprev;
+ *pprev = next;
+ if (next)
+ next->pprev = pprev;
+}
+
+static inline void hlist_del(struct hlist_node *n)
+{
+ __hlist_del(n);
+ n->next = LIST_POISON1;
+ n->pprev = LIST_POISON2;
+}
+
+static inline void hlist_del_init(struct hlist_node *n)
+{
+ if (!hlist_unhashed(n)) {
+ __hlist_del(n);
+ INIT_HLIST_NODE(n);
+ }
+}
+
+static inline void hlist_add_head(struct hlist_node *n, struct hlist_head *h)
+{
+ struct hlist_node *first = h->first;
+ n->next = first;
+ if (first)
+ first->pprev = &n->next;
+ h->first = n;
+ n->pprev = &h->first;
+}
+
+/* next must be != NULL */
+static inline void hlist_add_before(struct hlist_node *n,
+ struct hlist_node *next)
+{
+ n->pprev = next->pprev;
+ n->next = next;
+ next->pprev = &n->next;
+ *(n->pprev) = n;
+}
+
+static inline void hlist_add_after(struct hlist_node *n,
+ struct hlist_node *next)
+{
+ next->next = n->next;
+ n->next = next;
+ next->pprev = &n->next;
+
+ if(next->next)
+ next->next->pprev = &next->next;
+}
+
+#define hlist_entry(ptr, type, member) container_of(ptr,type,member)
+
+#define hlist_for_each(pos, head) \
+ for (pos = (head)->first; pos; \
+ pos = pos->next)
+
+#define hlist_for_each_safe(pos, n, head) \
+ for (pos = (head)->first; pos && ({ n = pos->next; 1; }); \
+ pos = n)
+
+/**
+ * hlist_for_each_entry - iterate over list of given type
+ * @tpos: the type * to use as a loop cursor.
+ * @pos: the &struct hlist_node to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry(tpos, pos, head, member) \
+ for (pos = (head)->first; \
+ pos && \
+ ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
+ pos = pos->next)
+
+/**
+ * hlist_for_each_entry_continue - iterate over a hlist continuing after current point
+ * @tpos: the type * to use as a loop cursor.
+ * @pos: the &struct hlist_node to use as a loop cursor.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_continue(tpos, pos, member) \
+ for (pos = (pos)->next; \
+ pos && \
+ ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
+ pos = pos->next)
+
+/**
+ * hlist_for_each_entry_from - iterate over a hlist continuing from current point
+ * @tpos: the type * to use as a loop cursor.
+ * @pos: the &struct hlist_node to use as a loop cursor.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_from(tpos, pos, member) \
+ for (; pos && \
+ ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
+ pos = pos->next)
+
+/**
+ * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @tpos: the type * to use as a loop cursor.
+ * @pos: the &struct hlist_node to use as a loop cursor.
+ * @n: another &struct hlist_node to use as temporary storage
+ * @head: the head for your list.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_safe(tpos, pos, n, head, member) \
+ for (pos = (head)->first; \
+ pos && ({ n = pos->next; 1; }) && \
+ ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
+ pos = n)
+
+#endif
--- /dev/null
+#include "cache.h"
+#include "run-command.h"
+#include "sigchain.h"
+
+/*
+ * This is split up from the rest of git so that we can do
+ * something different on Windows.
+ */
+
+static int spawned_pager;
+
+#ifndef __MINGW32__
+static void pager_preexec(void)
+{
+ /*
+ * Work around bug in "less" by not starting it until we
+ * have real input
+ */
+ fd_set in;
+
+ FD_ZERO(&in);
+ FD_SET(0, &in);
+ select(1, &in, NULL, &in, NULL);
+
+ setenv("LESS", "FRSX", 0);
+}
+#endif
+
+static const char *pager_argv[] = { "sh", "-c", NULL, NULL };
+static struct child_process pager_process;
+
+static void wait_for_pager(void)
+{
+ fflush(stdout);
+ fflush(stderr);
+ /* signal EOF to pager */
+ close(1);
+ close(2);
+ finish_command(&pager_process);
+}
+
+static void wait_for_pager_signal(int signo)
+{
+ wait_for_pager();
+ sigchain_pop(signo);
+ raise(signo);
+}
+
+void setup_pager(void)
+{
+ const char *pager = getenv("PERF_PAGER");
+
+ if (!isatty(1))
+ return;
+ if (!pager) {
+ if (!pager_program)
+ perf_config(perf_default_config, NULL);
+ pager = pager_program;
+ }
+ if (!pager)
+ pager = getenv("PAGER");
+ if (!pager)
+ pager = "less";
+ else if (!*pager || !strcmp(pager, "cat"))
+ return;
+
+ spawned_pager = 1; /* means we are emitting to terminal */
+
+ /* spawn the pager */
+ pager_argv[2] = pager;
+ pager_process.argv = pager_argv;
+ pager_process.in = -1;
+#ifndef __MINGW32__
+ pager_process.preexec_cb = pager_preexec;
+#endif
+ if (start_command(&pager_process))
+ return;
+
+ /* original process continues, but writes to the pipe */
+ dup2(pager_process.in, 1);
+ if (isatty(2))
+ dup2(pager_process.in, 2);
+ close(pager_process.in);
+
+ /* this makes sure that the parent terminates after the pager */
+ sigchain_push_common(wait_for_pager_signal);
+ atexit(wait_for_pager);
+}
+
+int pager_in_use(void)
+{
+ const char *env;
+
+ if (spawned_pager)
+ return 1;
+
+ env = getenv("PERF_PAGER_IN_USE");
+ return env ? perf_config_bool("PERF_PAGER_IN_USE", env) : 0;
+}
--- /dev/null
+
+#include "../perf.h"
+#include "util.h"
+#include "parse-options.h"
+#include "parse-events.h"
+#include "exec_cmd.h"
+#include "string.h"
+
+extern char *strcasestr(const char *haystack, const char *needle);
+
+int nr_counters;
+
+struct perf_counter_attr attrs[MAX_COUNTERS];
+
+struct event_symbol {
+ __u8 type;
+ __u64 config;
+ char *symbol;
+};
+
+#define C(x, y) .type = PERF_TYPE_##x, .config = PERF_COUNT_##y
+#define CR(x, y) .type = PERF_TYPE_##x, .config = y
+
+static struct event_symbol event_symbols[] = {
+ { C(HARDWARE, HW_CPU_CYCLES), "cpu-cycles", },
+ { C(HARDWARE, HW_CPU_CYCLES), "cycles", },
+ { C(HARDWARE, HW_INSTRUCTIONS), "instructions", },
+ { C(HARDWARE, HW_CACHE_REFERENCES), "cache-references", },
+ { C(HARDWARE, HW_CACHE_MISSES), "cache-misses", },
+ { C(HARDWARE, HW_BRANCH_INSTRUCTIONS),"branch-instructions", },
+ { C(HARDWARE, HW_BRANCH_INSTRUCTIONS),"branches", },
+ { C(HARDWARE, HW_BRANCH_MISSES), "branch-misses", },
+ { C(HARDWARE, HW_BUS_CYCLES), "bus-cycles", },
+
+ { C(SOFTWARE, SW_CPU_CLOCK), "cpu-clock", },
+ { C(SOFTWARE, SW_TASK_CLOCK), "task-clock", },
+ { C(SOFTWARE, SW_PAGE_FAULTS), "page-faults", },
+ { C(SOFTWARE, SW_PAGE_FAULTS), "faults", },
+ { C(SOFTWARE, SW_PAGE_FAULTS_MIN), "minor-faults", },
+ { C(SOFTWARE, SW_PAGE_FAULTS_MAJ), "major-faults", },
+ { C(SOFTWARE, SW_CONTEXT_SWITCHES), "context-switches", },
+ { C(SOFTWARE, SW_CONTEXT_SWITCHES), "cs", },
+ { C(SOFTWARE, SW_CPU_MIGRATIONS), "cpu-migrations", },
+ { C(SOFTWARE, SW_CPU_MIGRATIONS), "migrations", },
+};
+
+#define __PERF_COUNTER_FIELD(config, name) \
+ ((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT)
+
+#define PERF_COUNTER_RAW(config) __PERF_COUNTER_FIELD(config, RAW)
+#define PERF_COUNTER_CONFIG(config) __PERF_COUNTER_FIELD(config, CONFIG)
+#define PERF_COUNTER_TYPE(config) __PERF_COUNTER_FIELD(config, TYPE)
+#define PERF_COUNTER_ID(config) __PERF_COUNTER_FIELD(config, EVENT)
+
+static char *hw_event_names[] = {
+ "cycles",
+ "instructions",
+ "cache-references",
+ "cache-misses",
+ "branches",
+ "branch-misses",
+ "bus-cycles",
+};
+
+static char *sw_event_names[] = {
+ "cpu-clock-ticks",
+ "task-clock-ticks",
+ "page-faults",
+ "context-switches",
+ "CPU-migrations",
+ "minor-faults",
+ "major-faults",
+};
+
+#define MAX_ALIASES 8
+
+static char *hw_cache [][MAX_ALIASES] = {
+ { "L1-data" , "l1-d", "l1d", "l1" },
+ { "L1-instruction" , "l1-i", "l1i" },
+ { "L2" , "l2" },
+ { "Data-TLB" , "dtlb", "d-tlb" },
+ { "Instruction-TLB" , "itlb", "i-tlb" },
+ { "Branch" , "bpu" , "btb", "bpc" },
+};
+
+static char *hw_cache_op [][MAX_ALIASES] = {
+ { "Load" , "read" },
+ { "Store" , "write" },
+ { "Prefetch" , "speculative-read", "speculative-load" },
+};
+
+static char *hw_cache_result [][MAX_ALIASES] = {
+ { "Reference" , "ops", "access" },
+ { "Miss" },
+};
+
+char *event_name(int counter)
+{
+ __u64 config = attrs[counter].config;
+ int type = attrs[counter].type;
+ static char buf[32];
+
+ if (attrs[counter].type == PERF_TYPE_RAW) {
+ sprintf(buf, "raw 0x%llx", config);
+ return buf;
+ }
+
+ switch (type) {
+ case PERF_TYPE_HARDWARE:
+ if (config < PERF_COUNT_HW_MAX)
+ return hw_event_names[config];
+ return "unknown-hardware";
+
+ case PERF_TYPE_HW_CACHE: {
+ __u8 cache_type, cache_op, cache_result;
+ static char name[100];
+
+ cache_type = (config >> 0) & 0xff;
+ if (cache_type > PERF_COUNT_HW_CACHE_MAX)
+ return "unknown-ext-hardware-cache-type";
+
+ cache_op = (config >> 8) & 0xff;
+ if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
+ return "unknown-ext-hardware-cache-op";
+
+ cache_result = (config >> 16) & 0xff;
+ if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
+ return "unknown-ext-hardware-cache-result";
+
+ sprintf(name, "%s-Cache-%s-%ses",
+ hw_cache[cache_type][0],
+ hw_cache_op[cache_op][0],
+ hw_cache_result[cache_result][0]);
+
+ return name;
+ }
+
+ case PERF_TYPE_SOFTWARE:
+ if (config < PERF_COUNT_SW_MAX)
+ return sw_event_names[config];
+ return "unknown-software";
+
+ default:
+ break;
+ }
+
+ return "unknown";
+}
+
+static int parse_aliases(const char *str, char *names[][MAX_ALIASES], int size)
+{
+ int i, j;
+
+ for (i = 0; i < size; i++) {
+ for (j = 0; j < MAX_ALIASES; j++) {
+ if (!names[i][j])
+ break;
+ if (strcasestr(str, names[i][j]))
+ return i;
+ }
+ }
+
+ return -1;
+}
+
+static int parse_generic_hw_symbols(const char *str, struct perf_counter_attr *attr)
+{
+ int cache_type = -1, cache_op = 0, cache_result = 0;
+
+ cache_type = parse_aliases(str, hw_cache, PERF_COUNT_HW_CACHE_MAX);
+ /*
+ * No fallback - if we cannot get a clear cache type
+ * then bail out:
+ */
+ if (cache_type == -1)
+ return -EINVAL;
+
+ cache_op = parse_aliases(str, hw_cache_op, PERF_COUNT_HW_CACHE_OP_MAX);
+ /*
+ * Fall back to reads:
+ */
+ if (cache_op == -1)
+ cache_op = PERF_COUNT_HW_CACHE_OP_READ;
+
+ cache_result = parse_aliases(str, hw_cache_result,
+ PERF_COUNT_HW_CACHE_RESULT_MAX);
+ /*
+ * Fall back to accesses:
+ */
+ if (cache_result == -1)
+ cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
+
+ attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
+ attr->type = PERF_TYPE_HW_CACHE;
+
+ return 0;
+}
+
+/*
+ * Each event can have multiple symbolic names.
+ * Symbolic names are (almost) exactly matched.
+ */
+static int parse_event_symbols(const char *str, struct perf_counter_attr *attr)
+{
+ __u64 config, id;
+ int type;
+ unsigned int i;
+ const char *sep, *pstr;
+
+ if (str[0] == 'r' && hex2u64(str + 1, &config) > 0) {
+ attr->type = PERF_TYPE_RAW;
+ attr->config = config;
+
+ return 0;
+ }
+
+ pstr = str;
+ sep = strchr(pstr, ':');
+ if (sep) {
+ type = atoi(pstr);
+ pstr = sep + 1;
+ id = atoi(pstr);
+ sep = strchr(pstr, ':');
+ if (sep) {
+ pstr = sep + 1;
+ if (strchr(pstr, 'k'))
+ attr->exclude_user = 1;
+ if (strchr(pstr, 'u'))
+ attr->exclude_kernel = 1;
+ }
+ attr->type = type;
+ attr->config = id;
+
+ return 0;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
+ if (!strncmp(str, event_symbols[i].symbol,
+ strlen(event_symbols[i].symbol))) {
+
+ attr->type = event_symbols[i].type;
+ attr->config = event_symbols[i].config;
+
+ return 0;
+ }
+ }
+
+ return parse_generic_hw_symbols(str, attr);
+}
+
+int parse_events(const struct option *opt, const char *str, int unset)
+{
+ struct perf_counter_attr attr;
+ int ret;
+
+ memset(&attr, 0, sizeof(attr));
+again:
+ if (nr_counters == MAX_COUNTERS)
+ return -1;
+
+ ret = parse_event_symbols(str, &attr);
+ if (ret < 0)
+ return ret;
+
+ attrs[nr_counters] = attr;
+ nr_counters++;
+
+ str = strstr(str, ",");
+ if (str) {
+ str++;
+ goto again;
+ }
+
+ return 0;
+}
+
+static const char * const event_type_descriptors[] = {
+ "",
+ "Hardware event",
+ "Software event",
+ "Tracepoint event",
+ "Hardware cache event",
+};
+
+/*
+ * Print the help text for the event symbols:
+ */
+void print_events(void)
+{
+ struct event_symbol *syms = event_symbols;
+ unsigned int i, type, prev_type = -1;
+
+ fprintf(stderr, "\n");
+ fprintf(stderr, "List of pre-defined events (to be used in -e):\n");
+
+ for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
+ type = syms->type + 1;
+ if (type > ARRAY_SIZE(event_type_descriptors))
+ type = 0;
+
+ if (type != prev_type)
+ fprintf(stderr, "\n");
+
+ fprintf(stderr, " %-30s [%s]\n", syms->symbol,
+ event_type_descriptors[type]);
+
+ prev_type = type;
+ }
+
+ fprintf(stderr, "\n");
+ fprintf(stderr, " %-30s [raw hardware event descriptor]\n",
+ "rNNN");
+ fprintf(stderr, "\n");
+
+ exit(129);
+}
--- /dev/null
+
+/*
+ * Parse symbolic events/counts passed in as options:
+ */
+
+extern int nr_counters;
+
+extern struct perf_counter_attr attrs[MAX_COUNTERS];
+
+extern char *event_name(int ctr);
+
+extern int parse_events(const struct option *opt, const char *str, int unset);
+
+#define EVENTS_HELP_MAX (128*1024)
+
+extern void print_events(void);
+
--- /dev/null
+#include "util.h"
+#include "parse-options.h"
+#include "cache.h"
+
+#define OPT_SHORT 1
+#define OPT_UNSET 2
+
+static int opterror(const struct option *opt, const char *reason, int flags)
+{
+ if (flags & OPT_SHORT)
+ return error("switch `%c' %s", opt->short_name, reason);
+ if (flags & OPT_UNSET)
+ return error("option `no-%s' %s", opt->long_name, reason);
+ return error("option `%s' %s", opt->long_name, reason);
+}
+
+static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
+ int flags, const char **arg)
+{
+ if (p->opt) {
+ *arg = p->opt;
+ p->opt = NULL;
+ } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
+ *arg = (const char *)opt->defval;
+ } else if (p->argc > 1) {
+ p->argc--;
+ *arg = *++p->argv;
+ } else
+ return opterror(opt, "requires a value", flags);
+ return 0;
+}
+
+static int get_value(struct parse_opt_ctx_t *p,
+ const struct option *opt, int flags)
+{
+ const char *s, *arg = NULL;
+ const int unset = flags & OPT_UNSET;
+
+ if (unset && p->opt)
+ return opterror(opt, "takes no value", flags);
+ if (unset && (opt->flags & PARSE_OPT_NONEG))
+ return opterror(opt, "isn't available", flags);
+
+ if (!(flags & OPT_SHORT) && p->opt) {
+ switch (opt->type) {
+ case OPTION_CALLBACK:
+ if (!(opt->flags & PARSE_OPT_NOARG))
+ break;
+ /* FALLTHROUGH */
+ case OPTION_BOOLEAN:
+ case OPTION_BIT:
+ case OPTION_SET_INT:
+ case OPTION_SET_PTR:
+ return opterror(opt, "takes no value", flags);
+ default:
+ break;
+ }
+ }
+
+ switch (opt->type) {
+ case OPTION_BIT:
+ if (unset)
+ *(int *)opt->value &= ~opt->defval;
+ else
+ *(int *)opt->value |= opt->defval;
+ return 0;
+
+ case OPTION_BOOLEAN:
+ *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
+ return 0;
+
+ case OPTION_SET_INT:
+ *(int *)opt->value = unset ? 0 : opt->defval;
+ return 0;
+
+ case OPTION_SET_PTR:
+ *(void **)opt->value = unset ? NULL : (void *)opt->defval;
+ return 0;
+
+ case OPTION_STRING:
+ if (unset)
+ *(const char **)opt->value = NULL;
+ else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
+ *(const char **)opt->value = (const char *)opt->defval;
+ else
+ return get_arg(p, opt, flags, (const char **)opt->value);
+ return 0;
+
+ case OPTION_CALLBACK:
+ if (unset)
+ return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
+ if (opt->flags & PARSE_OPT_NOARG)
+ return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
+ return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
+
+ case OPTION_INTEGER:
+ if (unset) {
+ *(int *)opt->value = 0;
+ return 0;
+ }
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ *(int *)opt->value = opt->defval;
+ return 0;
+ }
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ *(int *)opt->value = strtol(arg, (char **)&s, 10);
+ if (*s)
+ return opterror(opt, "expects a numerical value", flags);
+ return 0;
+
+ case OPTION_LONG:
+ if (unset) {
+ *(long *)opt->value = 0;
+ return 0;
+ }
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ *(long *)opt->value = opt->defval;
+ return 0;
+ }
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ *(long *)opt->value = strtol(arg, (char **)&s, 10);
+ if (*s)
+ return opterror(opt, "expects a numerical value", flags);
+ return 0;
+
+ default:
+ die("should not happen, someone must be hit on the forehead");
+ }
+}
+
+static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
+{
+ for (; options->type != OPTION_END; options++) {
+ if (options->short_name == *p->opt) {
+ p->opt = p->opt[1] ? p->opt + 1 : NULL;
+ return get_value(p, options, OPT_SHORT);
+ }
+ }
+ return -2;
+}
+
+static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
+ const struct option *options)
+{
+ const char *arg_end = strchr(arg, '=');
+ const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
+ int abbrev_flags = 0, ambiguous_flags = 0;
+
+ if (!arg_end)
+ arg_end = arg + strlen(arg);
+
+ for (; options->type != OPTION_END; options++) {
+ const char *rest;
+ int flags = 0;
+
+ if (!options->long_name)
+ continue;
+
+ rest = skip_prefix(arg, options->long_name);
+ if (options->type == OPTION_ARGUMENT) {
+ if (!rest)
+ continue;
+ if (*rest == '=')
+ return opterror(options, "takes no value", flags);
+ if (*rest)
+ continue;
+ p->out[p->cpidx++] = arg - 2;
+ return 0;
+ }
+ if (!rest) {
+ /* abbreviated? */
+ if (!strncmp(options->long_name, arg, arg_end - arg)) {
+is_abbreviated:
+ if (abbrev_option) {
+ /*
+ * If this is abbreviated, it is
+ * ambiguous. So when there is no
+ * exact match later, we need to
+ * error out.
+ */
+ ambiguous_option = abbrev_option;
+ ambiguous_flags = abbrev_flags;
+ }
+ if (!(flags & OPT_UNSET) && *arg_end)
+ p->opt = arg_end + 1;
+ abbrev_option = options;
+ abbrev_flags = flags;
+ continue;
+ }
+ /* negated and abbreviated very much? */
+ if (!prefixcmp("no-", arg)) {
+ flags |= OPT_UNSET;
+ goto is_abbreviated;
+ }
+ /* negated? */
+ if (strncmp(arg, "no-", 3))
+ continue;
+ flags |= OPT_UNSET;
+ rest = skip_prefix(arg + 3, options->long_name);
+ /* abbreviated and negated? */
+ if (!rest && !prefixcmp(options->long_name, arg + 3))
+ goto is_abbreviated;
+ if (!rest)
+ continue;
+ }
+ if (*rest) {
+ if (*rest != '=')
+ continue;
+ p->opt = rest + 1;
+ }
+ return get_value(p, options, flags);
+ }
+
+ if (ambiguous_option)
+ return error("Ambiguous option: %s "
+ "(could be --%s%s or --%s%s)",
+ arg,
+ (ambiguous_flags & OPT_UNSET) ? "no-" : "",
+ ambiguous_option->long_name,
+ (abbrev_flags & OPT_UNSET) ? "no-" : "",
+ abbrev_option->long_name);
+ if (abbrev_option)
+ return get_value(p, abbrev_option, abbrev_flags);
+ return -2;
+}
+
+static void check_typos(const char *arg, const struct option *options)
+{
+ if (strlen(arg) < 3)
+ return;
+
+ if (!prefixcmp(arg, "no-")) {
+ error ("did you mean `--%s` (with two dashes ?)", arg);
+ exit(129);
+ }
+
+ for (; options->type != OPTION_END; options++) {
+ if (!options->long_name)
+ continue;
+ if (!prefixcmp(options->long_name, arg)) {
+ error ("did you mean `--%s` (with two dashes ?)", arg);
+ exit(129);
+ }
+ }
+}
+
+void parse_options_start(struct parse_opt_ctx_t *ctx,
+ int argc, const char **argv, int flags)
+{
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->argc = argc - 1;
+ ctx->argv = argv + 1;
+ ctx->out = argv;
+ ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
+ ctx->flags = flags;
+ if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
+ (flags & PARSE_OPT_STOP_AT_NON_OPTION))
+ die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
+}
+
+static int usage_with_options_internal(const char * const *,
+ const struct option *, int);
+
+int parse_options_step(struct parse_opt_ctx_t *ctx,
+ const struct option *options,
+ const char * const usagestr[])
+{
+ int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
+
+ /* we must reset ->opt, unknown short option leave it dangling */
+ ctx->opt = NULL;
+
+ for (; ctx->argc; ctx->argc--, ctx->argv++) {
+ const char *arg = ctx->argv[0];
+
+ if (*arg != '-' || !arg[1]) {
+ if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
+ break;
+ ctx->out[ctx->cpidx++] = ctx->argv[0];
+ continue;
+ }
+
+ if (arg[1] != '-') {
+ ctx->opt = arg + 1;
+ if (internal_help && *ctx->opt == 'h')
+ return parse_options_usage(usagestr, options);
+ switch (parse_short_opt(ctx, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options);
+ case -2:
+ goto unknown;
+ }
+ if (ctx->opt)
+ check_typos(arg + 1, options);
+ while (ctx->opt) {
+ if (internal_help && *ctx->opt == 'h')
+ return parse_options_usage(usagestr, options);
+ switch (parse_short_opt(ctx, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options);
+ case -2:
+ /* fake a short option thing to hide the fact that we may have
+ * started to parse aggregated stuff
+ *
+ * This is leaky, too bad.
+ */
+ ctx->argv[0] = strdup(ctx->opt - 1);
+ *(char *)ctx->argv[0] = '-';
+ goto unknown;
+ }
+ }
+ continue;
+ }
+
+ if (!arg[2]) { /* "--" */
+ if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
+ ctx->argc--;
+ ctx->argv++;
+ }
+ break;
+ }
+
+ if (internal_help && !strcmp(arg + 2, "help-all"))
+ return usage_with_options_internal(usagestr, options, 1);
+ if (internal_help && !strcmp(arg + 2, "help"))
+ return parse_options_usage(usagestr, options);
+ switch (parse_long_opt(ctx, arg + 2, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options);
+ case -2:
+ goto unknown;
+ }
+ continue;
+unknown:
+ if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
+ return PARSE_OPT_UNKNOWN;
+ ctx->out[ctx->cpidx++] = ctx->argv[0];
+ ctx->opt = NULL;
+ }
+ return PARSE_OPT_DONE;
+}
+
+int parse_options_end(struct parse_opt_ctx_t *ctx)
+{
+ memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
+ ctx->out[ctx->cpidx + ctx->argc] = NULL;
+ return ctx->cpidx + ctx->argc;
+}
+
+int parse_options(int argc, const char **argv, const struct option *options,
+ const char * const usagestr[], int flags)
+{
+ struct parse_opt_ctx_t ctx;
+
+ parse_options_start(&ctx, argc, argv, flags);
+ switch (parse_options_step(&ctx, options, usagestr)) {
+ case PARSE_OPT_HELP:
+ exit(129);
+ case PARSE_OPT_DONE:
+ break;
+ default: /* PARSE_OPT_UNKNOWN */
+ if (ctx.argv[0][1] == '-') {
+ error("unknown option `%s'", ctx.argv[0] + 2);
+ } else {
+ error("unknown switch `%c'", *ctx.opt);
+ }
+ usage_with_options(usagestr, options);
+ }
+
+ return parse_options_end(&ctx);
+}
+
+#define USAGE_OPTS_WIDTH 24
+#define USAGE_GAP 2
+
+int usage_with_options_internal(const char * const *usagestr,
+ const struct option *opts, int full)
+{
+ if (!usagestr)
+ return PARSE_OPT_HELP;
+
+ fprintf(stderr, "\n usage: %s\n", *usagestr++);
+ while (*usagestr && **usagestr)
+ fprintf(stderr, " or: %s\n", *usagestr++);
+ while (*usagestr) {
+ fprintf(stderr, "%s%s\n",
+ **usagestr ? " " : "",
+ *usagestr);
+ usagestr++;
+ }
+
+ if (opts->type != OPTION_GROUP)
+ fputc('\n', stderr);
+
+ for (; opts->type != OPTION_END; opts++) {
+ size_t pos;
+ int pad;
+
+ if (opts->type == OPTION_GROUP) {
+ fputc('\n', stderr);
+ if (*opts->help)
+ fprintf(stderr, "%s\n", opts->help);
+ continue;
+ }
+ if (!full && (opts->flags & PARSE_OPT_HIDDEN))
+ continue;
+
+ pos = fprintf(stderr, " ");
+ if (opts->short_name)
+ pos += fprintf(stderr, "-%c", opts->short_name);
+ if (opts->long_name && opts->short_name)
+ pos += fprintf(stderr, ", ");
+ if (opts->long_name)
+ pos += fprintf(stderr, "--%s", opts->long_name);
+
+ switch (opts->type) {
+ case OPTION_ARGUMENT:
+ break;
+ case OPTION_INTEGER:
+ if (opts->flags & PARSE_OPT_OPTARG)
+ if (opts->long_name)
+ pos += fprintf(stderr, "[=<n>]");
+ else
+ pos += fprintf(stderr, "[<n>]");
+ else
+ pos += fprintf(stderr, " <n>");
+ break;
+ case OPTION_CALLBACK:
+ if (opts->flags & PARSE_OPT_NOARG)
+ break;
+ /* FALLTHROUGH */
+ case OPTION_STRING:
+ if (opts->argh) {
+ if (opts->flags & PARSE_OPT_OPTARG)
+ if (opts->long_name)
+ pos += fprintf(stderr, "[=<%s>]", opts->argh);
+ else
+ pos += fprintf(stderr, "[<%s>]", opts->argh);
+ else
+ pos += fprintf(stderr, " <%s>", opts->argh);
+ } else {
+ if (opts->flags & PARSE_OPT_OPTARG)
+ if (opts->long_name)
+ pos += fprintf(stderr, "[=...]");
+ else
+ pos += fprintf(stderr, "[...]");
+ else
+ pos += fprintf(stderr, " ...");
+ }
+ break;
+ default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
+ break;
+ }
+
+ if (pos <= USAGE_OPTS_WIDTH)
+ pad = USAGE_OPTS_WIDTH - pos;
+ else {
+ fputc('\n', stderr);
+ pad = USAGE_OPTS_WIDTH;
+ }
+ fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
+ }
+ fputc('\n', stderr);
+
+ return PARSE_OPT_HELP;
+}
+
+void usage_with_options(const char * const *usagestr,
+ const struct option *opts)
+{
+ usage_with_options_internal(usagestr, opts, 0);
+ exit(129);
+}
+
+int parse_options_usage(const char * const *usagestr,
+ const struct option *opts)
+{
+ return usage_with_options_internal(usagestr, opts, 0);
+}
+
+
+int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
+ int unset)
+{
+ int *target = opt->value;
+
+ if (unset)
+ /* --no-quiet, --no-verbose */
+ *target = 0;
+ else if (opt->short_name == 'v') {
+ if (*target >= 0)
+ (*target)++;
+ else
+ *target = 1;
+ } else {
+ if (*target <= 0)
+ (*target)--;
+ else
+ *target = -1;
+ }
+ return 0;
+}
--- /dev/null
+#ifndef PARSE_OPTIONS_H
+#define PARSE_OPTIONS_H
+
+enum parse_opt_type {
+ /* special types */
+ OPTION_END,
+ OPTION_ARGUMENT,
+ OPTION_GROUP,
+ /* options with no arguments */
+ OPTION_BIT,
+ OPTION_BOOLEAN, /* _INCR would have been a better name */
+ OPTION_SET_INT,
+ OPTION_SET_PTR,
+ /* options with arguments (usually) */
+ OPTION_STRING,
+ OPTION_INTEGER,
+ OPTION_LONG,
+ OPTION_CALLBACK,
+};
+
+enum parse_opt_flags {
+ PARSE_OPT_KEEP_DASHDASH = 1,
+ PARSE_OPT_STOP_AT_NON_OPTION = 2,
+ PARSE_OPT_KEEP_ARGV0 = 4,
+ PARSE_OPT_KEEP_UNKNOWN = 8,
+ PARSE_OPT_NO_INTERNAL_HELP = 16,
+};
+
+enum parse_opt_option_flags {
+ PARSE_OPT_OPTARG = 1,
+ PARSE_OPT_NOARG = 2,
+ PARSE_OPT_NONEG = 4,
+ PARSE_OPT_HIDDEN = 8,
+ PARSE_OPT_LASTARG_DEFAULT = 16,
+};
+
+struct option;
+typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
+
+/*
+ * `type`::
+ * holds the type of the option, you must have an OPTION_END last in your
+ * array.
+ *
+ * `short_name`::
+ * the character to use as a short option name, '\0' if none.
+ *
+ * `long_name`::
+ * the long option name, without the leading dashes, NULL if none.
+ *
+ * `value`::
+ * stores pointers to the values to be filled.
+ *
+ * `argh`::
+ * token to explain the kind of argument this option wants. Keep it
+ * homogenous across the repository.
+ *
+ * `help`::
+ * the short help associated to what the option does.
+ * Must never be NULL (except for OPTION_END).
+ * OPTION_GROUP uses this pointer to store the group header.
+ *
+ * `flags`::
+ * mask of parse_opt_option_flags.
+ * PARSE_OPT_OPTARG: says that the argument is optionnal (not for BOOLEANs)
+ * PARSE_OPT_NOARG: says that this option takes no argument, for CALLBACKs
+ * PARSE_OPT_NONEG: says that this option cannot be negated
+ * PARSE_OPT_HIDDEN this option is skipped in the default usage, showed in
+ * the long one.
+ *
+ * `callback`::
+ * pointer to the callback to use for OPTION_CALLBACK.
+ *
+ * `defval`::
+ * default value to fill (*->value) with for PARSE_OPT_OPTARG.
+ * OPTION_{BIT,SET_INT,SET_PTR} store the {mask,integer,pointer} to put in
+ * the value when met.
+ * CALLBACKS can use it like they want.
+ */
+struct option {
+ enum parse_opt_type type;
+ int short_name;
+ const char *long_name;
+ void *value;
+ const char *argh;
+ const char *help;
+
+ int flags;
+ parse_opt_cb *callback;
+ intptr_t defval;
+};
+
+#define OPT_END() { OPTION_END }
+#define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, (h) }
+#define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
+#define OPT_BIT(s, l, v, h, b) { OPTION_BIT, (s), (l), (v), NULL, (h), 0, NULL, (b) }
+#define OPT_BOOLEAN(s, l, v, h) { OPTION_BOOLEAN, (s), (l), (v), NULL, (h) }
+#define OPT_SET_INT(s, l, v, h, i) { OPTION_SET_INT, (s), (l), (v), NULL, (h), 0, NULL, (i) }
+#define OPT_SET_PTR(s, l, v, h, p) { OPTION_SET_PTR, (s), (l), (v), NULL, (h), 0, NULL, (p) }
+#define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), NULL, (h) }
+#define OPT_LONG(s, l, v, h) { OPTION_LONG, (s), (l), (v), NULL, (h) }
+#define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) }
+#define OPT_DATE(s, l, v, h) \
+ { OPTION_CALLBACK, (s), (l), (v), "time",(h), 0, \
+ parse_opt_approxidate_cb }
+#define OPT_CALLBACK(s, l, v, a, h, f) \
+ { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
+
+/* parse_options() will filter out the processed options and leave the
+ * non-option argments in argv[].
+ * Returns the number of arguments left in argv[].
+ */
+extern int parse_options(int argc, const char **argv,
+ const struct option *options,
+ const char * const usagestr[], int flags);
+
+extern NORETURN void usage_with_options(const char * const *usagestr,
+ const struct option *options);
+
+/*----- incremantal advanced APIs -----*/
+
+enum {
+ PARSE_OPT_HELP = -1,
+ PARSE_OPT_DONE,
+ PARSE_OPT_UNKNOWN,
+};
+
+/*
+ * It's okay for the caller to consume argv/argc in the usual way.
+ * Other fields of that structure are private to parse-options and should not
+ * be modified in any way.
+ */
+struct parse_opt_ctx_t {
+ const char **argv;
+ const char **out;
+ int argc, cpidx;
+ const char *opt;
+ int flags;
+};
+
+extern int parse_options_usage(const char * const *usagestr,
+ const struct option *opts);
+
+extern void parse_options_start(struct parse_opt_ctx_t *ctx,
+ int argc, const char **argv, int flags);
+
+extern int parse_options_step(struct parse_opt_ctx_t *ctx,
+ const struct option *options,
+ const char * const usagestr[]);
+
+extern int parse_options_end(struct parse_opt_ctx_t *ctx);
+
+
+/*----- some often used options -----*/
+extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
+extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
+extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
+
+#define OPT__VERBOSE(var) OPT_BOOLEAN('v', "verbose", (var), "be verbose")
+#define OPT__QUIET(var) OPT_BOOLEAN('q', "quiet", (var), "be quiet")
+#define OPT__VERBOSITY(var) \
+ { OPTION_CALLBACK, 'v', "verbose", (var), NULL, "be more verbose", \
+ PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
+ { OPTION_CALLBACK, 'q', "quiet", (var), NULL, "be more quiet", \
+ PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
+#define OPT__DRY_RUN(var) OPT_BOOLEAN('n', "dry-run", (var), "dry run")
+#define OPT__ABBREV(var) \
+ { OPTION_CALLBACK, 0, "abbrev", (var), "n", \
+ "use <n> digits to display SHA-1s", \
+ PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
+
+extern const char *parse_options_fix_filename(const char *prefix, const char *file);
+
+#endif
--- /dev/null
+/*
+ * I'm tired of doing "vsnprintf()" etc just to open a
+ * file, so here's a "return static buffer with printf"
+ * interface for paths.
+ *
+ * It's obviously not thread-safe. Sue me. But it's quite
+ * useful for doing things like
+ *
+ * f = open(mkpath("%s/%s.perf", base, name), O_RDONLY);
+ *
+ * which is what it's designed for.
+ */
+#include "cache.h"
+
+static char bad_path[] = "/bad-path/";
+/*
+ * Two hacks:
+ */
+
+static char *get_perf_dir(void)
+{
+ return ".";
+}
+
+size_t strlcpy(char *dest, const char *src, size_t size)
+{
+ size_t ret = strlen(src);
+
+ if (size) {
+ size_t len = (ret >= size) ? size - 1 : ret;
+ memcpy(dest, src, len);
+ dest[len] = '\0';
+ }
+ return ret;
+}
+
+
+static char *get_pathname(void)
+{
+ static char pathname_array[4][PATH_MAX];
+ static int index;
+ return pathname_array[3 & ++index];
+}
+
+static char *cleanup_path(char *path)
+{
+ /* Clean it up */
+ if (!memcmp(path, "./", 2)) {
+ path += 2;
+ while (*path == '/')
+ path++;
+ }
+ return path;
+}
+
+char *mksnpath(char *buf, size_t n, const char *fmt, ...)
+{
+ va_list args;
+ unsigned len;
+
+ va_start(args, fmt);
+ len = vsnprintf(buf, n, fmt, args);
+ va_end(args);
+ if (len >= n) {
+ strlcpy(buf, bad_path, n);
+ return buf;
+ }
+ return cleanup_path(buf);
+}
+
+static char *perf_vsnpath(char *buf, size_t n, const char *fmt, va_list args)
+{
+ const char *perf_dir = get_perf_dir();
+ size_t len;
+
+ len = strlen(perf_dir);
+ if (n < len + 1)
+ goto bad;
+ memcpy(buf, perf_dir, len);
+ if (len && !is_dir_sep(perf_dir[len-1]))
+ buf[len++] = '/';
+ len += vsnprintf(buf + len, n - len, fmt, args);
+ if (len >= n)
+ goto bad;
+ return cleanup_path(buf);
+bad:
+ strlcpy(buf, bad_path, n);
+ return buf;
+}
+
+char *perf_snpath(char *buf, size_t n, const char *fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ (void)perf_vsnpath(buf, n, fmt, args);
+ va_end(args);
+ return buf;
+}
+
+char *perf_pathdup(const char *fmt, ...)
+{
+ char path[PATH_MAX];
+ va_list args;
+ va_start(args, fmt);
+ (void)perf_vsnpath(path, sizeof(path), fmt, args);
+ va_end(args);
+ return xstrdup(path);
+}
+
+char *mkpath(const char *fmt, ...)
+{
+ va_list args;
+ unsigned len;
+ char *pathname = get_pathname();
+
+ va_start(args, fmt);
+ len = vsnprintf(pathname, PATH_MAX, fmt, args);
+ va_end(args);
+ if (len >= PATH_MAX)
+ return bad_path;
+ return cleanup_path(pathname);
+}
+
+char *perf_path(const char *fmt, ...)
+{
+ const char *perf_dir = get_perf_dir();
+ char *pathname = get_pathname();
+ va_list args;
+ unsigned len;
+
+ len = strlen(perf_dir);
+ if (len > PATH_MAX-100)
+ return bad_path;
+ memcpy(pathname, perf_dir, len);
+ if (len && perf_dir[len-1] != '/')
+ pathname[len++] = '/';
+ va_start(args, fmt);
+ len += vsnprintf(pathname + len, PATH_MAX - len, fmt, args);
+ va_end(args);
+ if (len >= PATH_MAX)
+ return bad_path;
+ return cleanup_path(pathname);
+}
+
+
+/* perf_mkstemp() - create tmp file honoring TMPDIR variable */
+int perf_mkstemp(char *path, size_t len, const char *template)
+{
+ const char *tmp;
+ size_t n;
+
+ tmp = getenv("TMPDIR");
+ if (!tmp)
+ tmp = "/tmp";
+ n = snprintf(path, len, "%s/%s", tmp, template);
+ if (len <= n) {
+ errno = ENAMETOOLONG;
+ return -1;
+ }
+ return mkstemp(path);
+}
+
+
+const char *make_relative_path(const char *abs, const char *base)
+{
+ static char buf[PATH_MAX + 1];
+ int baselen;
+ if (!base)
+ return abs;
+ baselen = strlen(base);
+ if (prefixcmp(abs, base))
+ return abs;
+ if (abs[baselen] == '/')
+ baselen++;
+ else if (base[baselen - 1] != '/')
+ return abs;
+ strcpy(buf, abs + baselen);
+ return buf;
+}
+
+/*
+ * It is okay if dst == src, but they should not overlap otherwise.
+ *
+ * Performs the following normalizations on src, storing the result in dst:
+ * - Ensures that components are separated by '/' (Windows only)
+ * - Squashes sequences of '/'.
+ * - Removes "." components.
+ * - Removes ".." components, and the components the precede them.
+ * Returns failure (non-zero) if a ".." component appears as first path
+ * component anytime during the normalization. Otherwise, returns success (0).
+ *
+ * Note that this function is purely textual. It does not follow symlinks,
+ * verify the existence of the path, or make any system calls.
+ */
+int normalize_path_copy(char *dst, const char *src)
+{
+ char *dst0;
+
+ if (has_dos_drive_prefix(src)) {
+ *dst++ = *src++;
+ *dst++ = *src++;
+ }
+ dst0 = dst;
+
+ if (is_dir_sep(*src)) {
+ *dst++ = '/';
+ while (is_dir_sep(*src))
+ src++;
+ }
+
+ for (;;) {
+ char c = *src;
+
+ /*
+ * A path component that begins with . could be
+ * special:
+ * (1) "." and ends -- ignore and terminate.
+ * (2) "./" -- ignore them, eat slash and continue.
+ * (3) ".." and ends -- strip one and terminate.
+ * (4) "../" -- strip one, eat slash and continue.
+ */
+ if (c == '.') {
+ if (!src[1]) {
+ /* (1) */
+ src++;
+ } else if (is_dir_sep(src[1])) {
+ /* (2) */
+ src += 2;
+ while (is_dir_sep(*src))
+ src++;
+ continue;
+ } else if (src[1] == '.') {
+ if (!src[2]) {
+ /* (3) */
+ src += 2;
+ goto up_one;
+ } else if (is_dir_sep(src[2])) {
+ /* (4) */
+ src += 3;
+ while (is_dir_sep(*src))
+ src++;
+ goto up_one;
+ }
+ }
+ }
+
+ /* copy up to the next '/', and eat all '/' */
+ while ((c = *src++) != '\0' && !is_dir_sep(c))
+ *dst++ = c;
+ if (is_dir_sep(c)) {
+ *dst++ = '/';
+ while (is_dir_sep(c))
+ c = *src++;
+ src--;
+ } else if (!c)
+ break;
+ continue;
+
+ up_one:
+ /*
+ * dst0..dst is prefix portion, and dst[-1] is '/';
+ * go up one level.
+ */
+ dst--; /* go to trailing '/' */
+ if (dst <= dst0)
+ return -1;
+ /* Windows: dst[-1] cannot be backslash anymore */
+ while (dst0 < dst && dst[-1] != '/')
+ dst--;
+ }
+ *dst = '\0';
+ return 0;
+}
+
+/*
+ * path = Canonical absolute path
+ * prefix_list = Colon-separated list of absolute paths
+ *
+ * Determines, for each path in prefix_list, whether the "prefix" really
+ * is an ancestor directory of path. Returns the length of the longest
+ * ancestor directory, excluding any trailing slashes, or -1 if no prefix
+ * is an ancestor. (Note that this means 0 is returned if prefix_list is
+ * "/".) "/foo" is not considered an ancestor of "/foobar". Directories
+ * are not considered to be their own ancestors. path must be in a
+ * canonical form: empty components, or "." or ".." components are not
+ * allowed. prefix_list may be null, which is like "".
+ */
+int longest_ancestor_length(const char *path, const char *prefix_list)
+{
+ char buf[PATH_MAX+1];
+ const char *ceil, *colon;
+ int len, max_len = -1;
+
+ if (prefix_list == NULL || !strcmp(path, "/"))
+ return -1;
+
+ for (colon = ceil = prefix_list; *colon; ceil = colon+1) {
+ for (colon = ceil; *colon && *colon != PATH_SEP; colon++);
+ len = colon - ceil;
+ if (len == 0 || len > PATH_MAX || !is_absolute_path(ceil))
+ continue;
+ strlcpy(buf, ceil, len+1);
+ if (normalize_path_copy(buf, buf) < 0)
+ continue;
+ len = strlen(buf);
+ if (len > 0 && buf[len-1] == '/')
+ buf[--len] = '\0';
+
+ if (!strncmp(path, buf, len) &&
+ path[len] == '/' &&
+ len > max_len) {
+ max_len = len;
+ }
+ }
+
+ return max_len;
+}
+
+/* strip arbitrary amount of directory separators at end of path */
+static inline int chomp_trailing_dir_sep(const char *path, int len)
+{
+ while (len && is_dir_sep(path[len - 1]))
+ len--;
+ return len;
+}
+
+/*
+ * If path ends with suffix (complete path components), returns the
+ * part before suffix (sans trailing directory separators).
+ * Otherwise returns NULL.
+ */
+char *strip_path_suffix(const char *path, const char *suffix)
+{
+ int path_len = strlen(path), suffix_len = strlen(suffix);
+
+ while (suffix_len) {
+ if (!path_len)
+ return NULL;
+
+ if (is_dir_sep(path[path_len - 1])) {
+ if (!is_dir_sep(suffix[suffix_len - 1]))
+ return NULL;
+ path_len = chomp_trailing_dir_sep(path, path_len);
+ suffix_len = chomp_trailing_dir_sep(suffix, suffix_len);
+ }
+ else if (path[--path_len] != suffix[--suffix_len])
+ return NULL;
+ }
+
+ if (path_len && !is_dir_sep(path[path_len - 1]))
+ return NULL;
+ return xstrndup(path, chomp_trailing_dir_sep(path, path_len));
+}
--- /dev/null
+#include "cache.h"
+#include "quote.h"
+
+int quote_path_fully = 1;
+
+/* Help to copy the thing properly quoted for the shell safety.
+ * any single quote is replaced with '\'', any exclamation point
+ * is replaced with '\!', and the whole thing is enclosed in a
+ *
+ * E.g.
+ * original sq_quote result
+ * name ==> name ==> 'name'
+ * a b ==> a b ==> 'a b'
+ * a'b ==> a'\''b ==> 'a'\''b'
+ * a!b ==> a'\!'b ==> 'a'\!'b'
+ */
+static inline int need_bs_quote(char c)
+{
+ return (c == '\'' || c == '!');
+}
+
+void sq_quote_buf(struct strbuf *dst, const char *src)
+{
+ char *to_free = NULL;
+
+ if (dst->buf == src)
+ to_free = strbuf_detach(dst, NULL);
+
+ strbuf_addch(dst, '\'');
+ while (*src) {
+ size_t len = strcspn(src, "'!");
+ strbuf_add(dst, src, len);
+ src += len;
+ while (need_bs_quote(*src)) {
+ strbuf_addstr(dst, "'\\");
+ strbuf_addch(dst, *src++);
+ strbuf_addch(dst, '\'');
+ }
+ }
+ strbuf_addch(dst, '\'');
+ free(to_free);
+}
+
+void sq_quote_print(FILE *stream, const char *src)
+{
+ char c;
+
+ fputc('\'', stream);
+ while ((c = *src++)) {
+ if (need_bs_quote(c)) {
+ fputs("'\\", stream);
+ fputc(c, stream);
+ fputc('\'', stream);
+ } else {
+ fputc(c, stream);
+ }
+ }
+ fputc('\'', stream);
+}
+
+void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
+{
+ int i;
+
+ /* Copy into destination buffer. */
+ strbuf_grow(dst, 255);
+ for (i = 0; argv[i]; ++i) {
+ strbuf_addch(dst, ' ');
+ sq_quote_buf(dst, argv[i]);
+ if (maxlen && dst->len > maxlen)
+ die("Too many or long arguments");
+ }
+}
+
+char *sq_dequote_step(char *arg, char **next)
+{
+ char *dst = arg;
+ char *src = arg;
+ char c;
+
+ if (*src != '\'')
+ return NULL;
+ for (;;) {
+ c = *++src;
+ if (!c)
+ return NULL;
+ if (c != '\'') {
+ *dst++ = c;
+ continue;
+ }
+ /* We stepped out of sq */
+ switch (*++src) {
+ case '\0':
+ *dst = 0;
+ if (next)
+ *next = NULL;
+ return arg;
+ case '\\':
+ c = *++src;
+ if (need_bs_quote(c) && *++src == '\'') {
+ *dst++ = c;
+ continue;
+ }
+ /* Fallthrough */
+ default:
+ if (!next || !isspace(*src))
+ return NULL;
+ do {
+ c = *++src;
+ } while (isspace(c));
+ *dst = 0;
+ *next = src;
+ return arg;
+ }
+ }
+}
+
+char *sq_dequote(char *arg)
+{
+ return sq_dequote_step(arg, NULL);
+}
+
+int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc)
+{
+ char *next = arg;
+
+ if (!*arg)
+ return 0;
+ do {
+ char *dequoted = sq_dequote_step(next, &next);
+ if (!dequoted)
+ return -1;
+ ALLOC_GROW(*argv, *nr + 1, *alloc);
+ (*argv)[(*nr)++] = dequoted;
+ } while (next);
+
+ return 0;
+}
+
+/* 1 means: quote as octal
+ * 0 means: quote as octal if (quote_path_fully)
+ * -1 means: never quote
+ * c: quote as "\\c"
+ */
+#define X8(x) x, x, x, x, x, x, x, x
+#define X16(x) X8(x), X8(x)
+static signed char const sq_lookup[256] = {
+ /* 0 1 2 3 4 5 6 7 */
+ /* 0x00 */ 1, 1, 1, 1, 1, 1, 1, 'a',
+ /* 0x08 */ 'b', 't', 'n', 'v', 'f', 'r', 1, 1,
+ /* 0x10 */ X16(1),
+ /* 0x20 */ -1, -1, '"', -1, -1, -1, -1, -1,
+ /* 0x28 */ X16(-1), X16(-1), X16(-1),
+ /* 0x58 */ -1, -1, -1, -1,'\\', -1, -1, -1,
+ /* 0x60 */ X16(-1), X8(-1),
+ /* 0x78 */ -1, -1, -1, -1, -1, -1, -1, 1,
+ /* 0x80 */ /* set to 0 */
+};
+
+static inline int sq_must_quote(char c)
+{
+ return sq_lookup[(unsigned char)c] + quote_path_fully > 0;
+}
+
+/* returns the longest prefix not needing a quote up to maxlen if positive.
+ This stops at the first \0 because it's marked as a character needing an
+ escape */
+static size_t next_quote_pos(const char *s, ssize_t maxlen)
+{
+ size_t len;
+ if (maxlen < 0) {
+ for (len = 0; !sq_must_quote(s[len]); len++);
+ } else {
+ for (len = 0; len < maxlen && !sq_must_quote(s[len]); len++);
+ }
+ return len;
+}
+
+/*
+ * C-style name quoting.
+ *
+ * (1) if sb and fp are both NULL, inspect the input name and counts the
+ * number of bytes that are needed to hold c_style quoted version of name,
+ * counting the double quotes around it but not terminating NUL, and
+ * returns it.
+ * However, if name does not need c_style quoting, it returns 0.
+ *
+ * (2) if sb or fp are not NULL, it emits the c_style quoted version
+ * of name, enclosed with double quotes if asked and needed only.
+ * Return value is the same as in (1).
+ */
+static size_t quote_c_style_counted(const char *name, ssize_t maxlen,
+ struct strbuf *sb, FILE *fp, int no_dq)
+{
+#undef EMIT
+#define EMIT(c) \
+ do { \
+ if (sb) strbuf_addch(sb, (c)); \
+ if (fp) fputc((c), fp); \
+ count++; \
+ } while (0)
+#define EMITBUF(s, l) \
+ do { \
+ int __ret; \
+ if (sb) strbuf_add(sb, (s), (l)); \
+ if (fp) __ret = fwrite((s), (l), 1, fp); \
+ count += (l); \
+ } while (0)
+
+ size_t len, count = 0;
+ const char *p = name;
+
+ for (;;) {
+ int ch;
+
+ len = next_quote_pos(p, maxlen);
+ if (len == maxlen || !p[len])
+ break;
+
+ if (!no_dq && p == name)
+ EMIT('"');
+
+ EMITBUF(p, len);
+ EMIT('\\');
+ p += len;
+ ch = (unsigned char)*p++;
+ if (sq_lookup[ch] >= ' ') {
+ EMIT(sq_lookup[ch]);
+ } else {
+ EMIT(((ch >> 6) & 03) + '0');
+ EMIT(((ch >> 3) & 07) + '0');
+ EMIT(((ch >> 0) & 07) + '0');
+ }
+ }
+
+ EMITBUF(p, len);
+ if (p == name) /* no ending quote needed */
+ return 0;
+
+ if (!no_dq)
+ EMIT('"');
+ return count;
+}
+
+size_t quote_c_style(const char *name, struct strbuf *sb, FILE *fp, int nodq)
+{
+ return quote_c_style_counted(name, -1, sb, fp, nodq);
+}
+
+void quote_two_c_style(struct strbuf *sb, const char *prefix, const char *path, int nodq)
+{
+ if (quote_c_style(prefix, NULL, NULL, 0) ||
+ quote_c_style(path, NULL, NULL, 0)) {
+ if (!nodq)
+ strbuf_addch(sb, '"');
+ quote_c_style(prefix, sb, NULL, 1);
+ quote_c_style(path, sb, NULL, 1);
+ if (!nodq)
+ strbuf_addch(sb, '"');
+ } else {
+ strbuf_addstr(sb, prefix);
+ strbuf_addstr(sb, path);
+ }
+}
+
+void write_name_quoted(const char *name, FILE *fp, int terminator)
+{
+ if (terminator) {
+ quote_c_style(name, NULL, fp, 0);
+ } else {
+ fputs(name, fp);
+ }
+ fputc(terminator, fp);
+}
+
+extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
+ const char *name, FILE *fp, int terminator)
+{
+ int needquote = 0;
+
+ if (terminator) {
+ needquote = next_quote_pos(pfx, pfxlen) < pfxlen
+ || name[next_quote_pos(name, -1)];
+ }
+ if (needquote) {
+ fputc('"', fp);
+ quote_c_style_counted(pfx, pfxlen, NULL, fp, 1);
+ quote_c_style(name, NULL, fp, 1);
+ fputc('"', fp);
+ } else {
+ int ret;
+
+ ret = fwrite(pfx, pfxlen, 1, fp);
+ fputs(name, fp);
+ }
+ fputc(terminator, fp);
+}
+
+/* quote path as relative to the given prefix */
+char *quote_path_relative(const char *in, int len,
+ struct strbuf *out, const char *prefix)
+{
+ int needquote;
+
+ if (len < 0)
+ len = strlen(in);
+
+ /* "../" prefix itself does not need quoting, but "in" might. */
+ needquote = next_quote_pos(in, len) < len;
+ strbuf_setlen(out, 0);
+ strbuf_grow(out, len);
+
+ if (needquote)
+ strbuf_addch(out, '"');
+ if (prefix) {
+ int off = 0;
+ while (prefix[off] && off < len && prefix[off] == in[off])
+ if (prefix[off] == '/') {
+ prefix += off + 1;
+ in += off + 1;
+ len -= off + 1;
+ off = 0;
+ } else
+ off++;
+
+ for (; *prefix; prefix++)
+ if (*prefix == '/')
+ strbuf_addstr(out, "../");
+ }
+
+ quote_c_style_counted (in, len, out, NULL, 1);
+
+ if (needquote)
+ strbuf_addch(out, '"');
+ if (!out->len)
+ strbuf_addstr(out, "./");
+
+ return out->buf;
+}
+
+/*
+ * C-style name unquoting.
+ *
+ * Quoted should point at the opening double quote.
+ * + Returns 0 if it was able to unquote the string properly, and appends the
+ * result in the strbuf `sb'.
+ * + Returns -1 in case of error, and doesn't touch the strbuf. Though note
+ * that this function will allocate memory in the strbuf, so calling
+ * strbuf_release is mandatory whichever result unquote_c_style returns.
+ *
+ * Updates endp pointer to point at one past the ending double quote if given.
+ */
+int unquote_c_style(struct strbuf *sb, const char *quoted, const char **endp)
+{
+ size_t oldlen = sb->len, len;
+ int ch, ac;
+
+ if (*quoted++ != '"')
+ return -1;
+
+ for (;;) {
+ len = strcspn(quoted, "\"\\");
+ strbuf_add(sb, quoted, len);
+ quoted += len;
+
+ switch (*quoted++) {
+ case '"':
+ if (endp)
+ *endp = quoted;
+ return 0;
+ case '\\':
+ break;
+ default:
+ goto error;
+ }
+
+ switch ((ch = *quoted++)) {
+ case 'a': ch = '\a'; break;
+ case 'b': ch = '\b'; break;
+ case 'f': ch = '\f'; break;
+ case 'n': ch = '\n'; break;
+ case 'r': ch = '\r'; break;
+ case 't': ch = '\t'; break;
+ case 'v': ch = '\v'; break;
+
+ case '\\': case '"':
+ break; /* verbatim */
+
+ /* octal values with first digit over 4 overflow */
+ case '0': case '1': case '2': case '3':
+ ac = ((ch - '0') << 6);
+ if ((ch = *quoted++) < '0' || '7' < ch)
+ goto error;
+ ac |= ((ch - '0') << 3);
+ if ((ch = *quoted++) < '0' || '7' < ch)
+ goto error;
+ ac |= (ch - '0');
+ ch = ac;
+ break;
+ default:
+ goto error;
+ }
+ strbuf_addch(sb, ch);
+ }
+
+ error:
+ strbuf_setlen(sb, oldlen);
+ return -1;
+}
+
+/* quoting as a string literal for other languages */
+
+void perl_quote_print(FILE *stream, const char *src)
+{
+ const char sq = '\'';
+ const char bq = '\\';
+ char c;
+
+ fputc(sq, stream);
+ while ((c = *src++)) {
+ if (c == sq || c == bq)
+ fputc(bq, stream);
+ fputc(c, stream);
+ }
+ fputc(sq, stream);
+}
+
+void python_quote_print(FILE *stream, const char *src)
+{
+ const char sq = '\'';
+ const char bq = '\\';
+ const char nl = '\n';
+ char c;
+
+ fputc(sq, stream);
+ while ((c = *src++)) {
+ if (c == nl) {
+ fputc(bq, stream);
+ fputc('n', stream);
+ continue;
+ }
+ if (c == sq || c == bq)
+ fputc(bq, stream);
+ fputc(c, stream);
+ }
+ fputc(sq, stream);
+}
+
+void tcl_quote_print(FILE *stream, const char *src)
+{
+ char c;
+
+ fputc('"', stream);
+ while ((c = *src++)) {
+ switch (c) {
+ case '[': case ']':
+ case '{': case '}':
+ case '$': case '\\': case '"':
+ fputc('\\', stream);
+ default:
+ fputc(c, stream);
+ break;
+ case '\f':
+ fputs("\\f", stream);
+ break;
+ case '\r':
+ fputs("\\r", stream);
+ break;
+ case '\n':
+ fputs("\\n", stream);
+ break;
+ case '\t':
+ fputs("\\t", stream);
+ break;
+ case '\v':
+ fputs("\\v", stream);
+ break;
+ }
+ }
+ fputc('"', stream);
+}
--- /dev/null
+#ifndef QUOTE_H
+#define QUOTE_H
+
+#include <stddef.h>
+#include <stdio.h>
+
+/* Help to copy the thing properly quoted for the shell safety.
+ * any single quote is replaced with '\'', any exclamation point
+ * is replaced with '\!', and the whole thing is enclosed in a
+ * single quote pair.
+ *
+ * For example, if you are passing the result to system() as an
+ * argument:
+ *
+ * sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
+ *
+ * would be appropriate. If the system() is going to call ssh to
+ * run the command on the other side:
+ *
+ * sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
+ * sprintf(rcmd, "ssh %s %s", sq_util/quote.host), sq_quote(cmd));
+ *
+ * Note that the above examples leak memory! Remember to free result from
+ * sq_quote() in a real application.
+ *
+ * sq_quote_buf() writes to an existing buffer of specified size; it
+ * will return the number of characters that would have been written
+ * excluding the final null regardless of the buffer size.
+ */
+
+extern void sq_quote_print(FILE *stream, const char *src);
+
+extern void sq_quote_buf(struct strbuf *, const char *src);
+extern void sq_quote_argv(struct strbuf *, const char **argv, size_t maxlen);
+
+/* This unwraps what sq_quote() produces in place, but returns
+ * NULL if the input does not look like what sq_quote would have
+ * produced.
+ */
+extern char *sq_dequote(char *);
+
+/*
+ * Same as the above, but can be used to unwrap many arguments in the
+ * same string separated by space. "next" is changed to point to the
+ * next argument that should be passed as first parameter. When there
+ * is no more argument to be dequoted, "next" is updated to point to NULL.
+ */
+extern char *sq_dequote_step(char *arg, char **next);
+extern int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc);
+
+extern int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
+extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
+extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);
+
+extern void write_name_quoted(const char *name, FILE *, int terminator);
+extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
+ const char *name, FILE *, int terminator);
+
+/* quote path as relative to the given prefix */
+char *quote_path_relative(const char *in, int len,
+ struct strbuf *out, const char *prefix);
+
+/* quoting as a string literal for other languages */
+extern void perl_quote_print(FILE *stream, const char *src);
+extern void python_quote_print(FILE *stream, const char *src);
+extern void tcl_quote_print(FILE *stream, const char *src);
+
+#endif
--- /dev/null
+/*
+ Red Black Trees
+ (C) 1999 Andrea Arcangeli <andrea@suse.de>
+ (C) 2002 David Woodhouse <dwmw2@infradead.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ linux/lib/rbtree.c
+*/
+
+#include "rbtree.h"
+
+static void __rb_rotate_left(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *right = node->rb_right;
+ struct rb_node *parent = rb_parent(node);
+
+ if ((node->rb_right = right->rb_left))
+ rb_set_parent(right->rb_left, node);
+ right->rb_left = node;
+
+ rb_set_parent(right, parent);
+
+ if (parent)
+ {
+ if (node == parent->rb_left)
+ parent->rb_left = right;
+ else
+ parent->rb_right = right;
+ }
+ else
+ root->rb_node = right;
+ rb_set_parent(node, right);
+}
+
+static void __rb_rotate_right(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *left = node->rb_left;
+ struct rb_node *parent = rb_parent(node);
+
+ if ((node->rb_left = left->rb_right))
+ rb_set_parent(left->rb_right, node);
+ left->rb_right = node;
+
+ rb_set_parent(left, parent);
+
+ if (parent)
+ {
+ if (node == parent->rb_right)
+ parent->rb_right = left;
+ else
+ parent->rb_left = left;
+ }
+ else
+ root->rb_node = left;
+ rb_set_parent(node, left);
+}
+
+void rb_insert_color(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *parent, *gparent;
+
+ while ((parent = rb_parent(node)) && rb_is_red(parent))
+ {
+ gparent = rb_parent(parent);
+
+ if (parent == gparent->rb_left)
+ {
+ {
+ register struct rb_node *uncle = gparent->rb_right;
+ if (uncle && rb_is_red(uncle))
+ {
+ rb_set_black(uncle);
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ node = gparent;
+ continue;
+ }
+ }
+
+ if (parent->rb_right == node)
+ {
+ register struct rb_node *tmp;
+ __rb_rotate_left(parent, root);
+ tmp = parent;
+ parent = node;
+ node = tmp;
+ }
+
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ __rb_rotate_right(gparent, root);
+ } else {
+ {
+ register struct rb_node *uncle = gparent->rb_left;
+ if (uncle && rb_is_red(uncle))
+ {
+ rb_set_black(uncle);
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ node = gparent;
+ continue;
+ }
+ }
+
+ if (parent->rb_left == node)
+ {
+ register struct rb_node *tmp;
+ __rb_rotate_right(parent, root);
+ tmp = parent;
+ parent = node;
+ node = tmp;
+ }
+
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ __rb_rotate_left(gparent, root);
+ }
+ }
+
+ rb_set_black(root->rb_node);
+}
+
+static void __rb_erase_color(struct rb_node *node, struct rb_node *parent,
+ struct rb_root *root)
+{
+ struct rb_node *other;
+
+ while ((!node || rb_is_black(node)) && node != root->rb_node)
+ {
+ if (parent->rb_left == node)
+ {
+ other = parent->rb_right;
+ if (rb_is_red(other))
+ {
+ rb_set_black(other);
+ rb_set_red(parent);
+ __rb_rotate_left(parent, root);
+ other = parent->rb_right;
+ }
+ if ((!other->rb_left || rb_is_black(other->rb_left)) &&
+ (!other->rb_right || rb_is_black(other->rb_right)))
+ {
+ rb_set_red(other);
+ node = parent;
+ parent = rb_parent(node);
+ }
+ else
+ {
+ if (!other->rb_right || rb_is_black(other->rb_right))
+ {
+ rb_set_black(other->rb_left);
+ rb_set_red(other);
+ __rb_rotate_right(other, root);
+ other = parent->rb_right;
+ }
+ rb_set_color(other, rb_color(parent));
+ rb_set_black(parent);
+ rb_set_black(other->rb_right);
+ __rb_rotate_left(parent, root);
+ node = root->rb_node;
+ break;
+ }
+ }
+ else
+ {
+ other = parent->rb_left;
+ if (rb_is_red(other))
+ {
+ rb_set_black(other);
+ rb_set_red(parent);
+ __rb_rotate_right(parent, root);
+ other = parent->rb_left;
+ }
+ if ((!other->rb_left || rb_is_black(other->rb_left)) &&
+ (!other->rb_right || rb_is_black(other->rb_right)))
+ {
+ rb_set_red(other);
+ node = parent;
+ parent = rb_parent(node);
+ }
+ else
+ {
+ if (!other->rb_left || rb_is_black(other->rb_left))
+ {
+ rb_set_black(other->rb_right);
+ rb_set_red(other);
+ __rb_rotate_left(other, root);
+ other = parent->rb_left;
+ }
+ rb_set_color(other, rb_color(parent));
+ rb_set_black(parent);
+ rb_set_black(other->rb_left);
+ __rb_rotate_right(parent, root);
+ node = root->rb_node;
+ break;
+ }
+ }
+ }
+ if (node)
+ rb_set_black(node);
+}
+
+void rb_erase(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *child, *parent;
+ int color;
+
+ if (!node->rb_left)
+ child = node->rb_right;
+ else if (!node->rb_right)
+ child = node->rb_left;
+ else
+ {
+ struct rb_node *old = node, *left;
+
+ node = node->rb_right;
+ while ((left = node->rb_left) != NULL)
+ node = left;
+ child = node->rb_right;
+ parent = rb_parent(node);
+ color = rb_color(node);
+
+ if (child)
+ rb_set_parent(child, parent);
+ if (parent == old) {
+ parent->rb_right = child;
+ parent = node;
+ } else
+ parent->rb_left = child;
+
+ node->rb_parent_color = old->rb_parent_color;
+ node->rb_right = old->rb_right;
+ node->rb_left = old->rb_left;
+
+ if (rb_parent(old))
+ {
+ if (rb_parent(old)->rb_left == old)
+ rb_parent(old)->rb_left = node;
+ else
+ rb_parent(old)->rb_right = node;
+ } else
+ root->rb_node = node;
+
+ rb_set_parent(old->rb_left, node);
+ if (old->rb_right)
+ rb_set_parent(old->rb_right, node);
+ goto color;
+ }
+
+ parent = rb_parent(node);
+ color = rb_color(node);
+
+ if (child)
+ rb_set_parent(child, parent);
+ if (parent)
+ {
+ if (parent->rb_left == node)
+ parent->rb_left = child;
+ else
+ parent->rb_right = child;
+ }
+ else
+ root->rb_node = child;
+
+ color:
+ if (color == RB_BLACK)
+ __rb_erase_color(child, parent, root);
+}
+
+/*
+ * This function returns the first node (in sort order) of the tree.
+ */
+struct rb_node *rb_first(const struct rb_root *root)
+{
+ struct rb_node *n;
+
+ n = root->rb_node;
+ if (!n)
+ return NULL;
+ while (n->rb_left)
+ n = n->rb_left;
+ return n;
+}
+
+struct rb_node *rb_last(const struct rb_root *root)
+{
+ struct rb_node *n;
+
+ n = root->rb_node;
+ if (!n)
+ return NULL;
+ while (n->rb_right)
+ n = n->rb_right;
+ return n;
+}
+
+struct rb_node *rb_next(const struct rb_node *node)
+{
+ struct rb_node *parent;
+
+ if (rb_parent(node) == node)
+ return NULL;
+
+ /* If we have a right-hand child, go down and then left as far
+ as we can. */
+ if (node->rb_right) {
+ node = node->rb_right;
+ while (node->rb_left)
+ node=node->rb_left;
+ return (struct rb_node *)node;
+ }
+
+ /* No right-hand children. Everything down and left is
+ smaller than us, so any 'next' node must be in the general
+ direction of our parent. Go up the tree; any time the
+ ancestor is a right-hand child of its parent, keep going
+ up. First time it's a left-hand child of its parent, said
+ parent is our 'next' node. */
+ while ((parent = rb_parent(node)) && node == parent->rb_right)
+ node = parent;
+
+ return parent;
+}
+
+struct rb_node *rb_prev(const struct rb_node *node)
+{
+ struct rb_node *parent;
+
+ if (rb_parent(node) == node)
+ return NULL;
+
+ /* If we have a left-hand child, go down and then right as far
+ as we can. */
+ if (node->rb_left) {
+ node = node->rb_left;
+ while (node->rb_right)
+ node=node->rb_right;
+ return (struct rb_node *)node;
+ }
+
+ /* No left-hand children. Go up till we find an ancestor which
+ is a right-hand child of its parent */
+ while ((parent = rb_parent(node)) && node == parent->rb_left)
+ node = parent;
+
+ return parent;
+}
+
+void rb_replace_node(struct rb_node *victim, struct rb_node *new,
+ struct rb_root *root)
+{
+ struct rb_node *parent = rb_parent(victim);
+
+ /* Set the surrounding nodes to point to the replacement */
+ if (parent) {
+ if (victim == parent->rb_left)
+ parent->rb_left = new;
+ else
+ parent->rb_right = new;
+ } else {
+ root->rb_node = new;
+ }
+ if (victim->rb_left)
+ rb_set_parent(victim->rb_left, new);
+ if (victim->rb_right)
+ rb_set_parent(victim->rb_right, new);
+
+ /* Copy the pointers/colour from the victim to the replacement */
+ *new = *victim;
+}
--- /dev/null
+/*
+ Red Black Trees
+ (C) 1999 Andrea Arcangeli <andrea@suse.de>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ linux/include/linux/rbtree.h
+
+ To use rbtrees you'll have to implement your own insert and search cores.
+ This will avoid us to use callbacks and to drop drammatically performances.
+ I know it's not the cleaner way, but in C (not in C++) to get
+ performances and genericity...
+
+ Some example of insert and search follows here. The search is a plain
+ normal search over an ordered tree. The insert instead must be implemented
+ int two steps: as first thing the code must insert the element in
+ order as a red leaf in the tree, then the support library function
+ rb_insert_color() must be called. Such function will do the
+ not trivial work to rebalance the rbtree if necessary.
+
+-----------------------------------------------------------------------
+static inline struct page * rb_search_page_cache(struct inode * inode,
+ unsigned long offset)
+{
+ struct rb_node * n = inode->i_rb_page_cache.rb_node;
+ struct page * page;
+
+ while (n)
+ {
+ page = rb_entry(n, struct page, rb_page_cache);
+
+ if (offset < page->offset)
+ n = n->rb_left;
+ else if (offset > page->offset)
+ n = n->rb_right;
+ else
+ return page;
+ }
+ return NULL;
+}
+
+static inline struct page * __rb_insert_page_cache(struct inode * inode,
+ unsigned long offset,
+ struct rb_node * node)
+{
+ struct rb_node ** p = &inode->i_rb_page_cache.rb_node;
+ struct rb_node * parent = NULL;
+ struct page * page;
+
+ while (*p)
+ {
+ parent = *p;
+ page = rb_entry(parent, struct page, rb_page_cache);
+
+ if (offset < page->offset)
+ p = &(*p)->rb_left;
+ else if (offset > page->offset)
+ p = &(*p)->rb_right;
+ else
+ return page;
+ }
+
+ rb_link_node(node, parent, p);
+
+ return NULL;
+}
+
+static inline struct page * rb_insert_page_cache(struct inode * inode,
+ unsigned long offset,
+ struct rb_node * node)
+{
+ struct page * ret;
+ if ((ret = __rb_insert_page_cache(inode, offset, node)))
+ goto out;
+ rb_insert_color(node, &inode->i_rb_page_cache);
+ out:
+ return ret;
+}
+-----------------------------------------------------------------------
+*/
+
+#ifndef _LINUX_RBTREE_H
+#define _LINUX_RBTREE_H
+
+#include <stddef.h>
+
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr: the pointer to the member.
+ * @type: the type of the container struct this is embedded in.
+ * @member: the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+
+struct rb_node
+{
+ unsigned long rb_parent_color;
+#define RB_RED 0
+#define RB_BLACK 1
+ struct rb_node *rb_right;
+ struct rb_node *rb_left;
+} __attribute__((aligned(sizeof(long))));
+ /* The alignment might seem pointless, but allegedly CRIS needs it */
+
+struct rb_root
+{
+ struct rb_node *rb_node;
+};
+
+
+#define rb_parent(r) ((struct rb_node *)((r)->rb_parent_color & ~3))
+#define rb_color(r) ((r)->rb_parent_color & 1)
+#define rb_is_red(r) (!rb_color(r))
+#define rb_is_black(r) rb_color(r)
+#define rb_set_red(r) do { (r)->rb_parent_color &= ~1; } while (0)
+#define rb_set_black(r) do { (r)->rb_parent_color |= 1; } while (0)
+
+static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
+{
+ rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p;
+}
+static inline void rb_set_color(struct rb_node *rb, int color)
+{
+ rb->rb_parent_color = (rb->rb_parent_color & ~1) | color;
+}
+
+#define RB_ROOT (struct rb_root) { NULL, }
+#define rb_entry(ptr, type, member) container_of(ptr, type, member)
+
+#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
+#define RB_EMPTY_NODE(node) (rb_parent(node) == node)
+#define RB_CLEAR_NODE(node) (rb_set_parent(node, node))
+
+extern void rb_insert_color(struct rb_node *, struct rb_root *);
+extern void rb_erase(struct rb_node *, struct rb_root *);
+
+/* Find logical next and previous nodes in a tree */
+extern struct rb_node *rb_next(const struct rb_node *);
+extern struct rb_node *rb_prev(const struct rb_node *);
+extern struct rb_node *rb_first(const struct rb_root *);
+extern struct rb_node *rb_last(const struct rb_root *);
+
+/* Fast replacement of a single node without remove/rebalance/add/rebalance */
+extern void rb_replace_node(struct rb_node *victim, struct rb_node *new,
+ struct rb_root *root);
+
+static inline void rb_link_node(struct rb_node * node, struct rb_node * parent,
+ struct rb_node ** rb_link)
+{
+ node->rb_parent_color = (unsigned long )parent;
+ node->rb_left = node->rb_right = NULL;
+
+ *rb_link = node;
+}
+
+#endif /* _LINUX_RBTREE_H */
--- /dev/null
+#include "cache.h"
+#include "run-command.h"
+#include "exec_cmd.h"
+
+static inline void close_pair(int fd[2])
+{
+ close(fd[0]);
+ close(fd[1]);
+}
+
+static inline void dup_devnull(int to)
+{
+ int fd = open("/dev/null", O_RDWR);
+ dup2(fd, to);
+ close(fd);
+}
+
+int start_command(struct child_process *cmd)
+{
+ int need_in, need_out, need_err;
+ int fdin[2], fdout[2], fderr[2];
+
+ /*
+ * In case of errors we must keep the promise to close FDs
+ * that have been passed in via ->in and ->out.
+ */
+
+ need_in = !cmd->no_stdin && cmd->in < 0;
+ if (need_in) {
+ if (pipe(fdin) < 0) {
+ if (cmd->out > 0)
+ close(cmd->out);
+ return -ERR_RUN_COMMAND_PIPE;
+ }
+ cmd->in = fdin[1];
+ }
+
+ need_out = !cmd->no_stdout
+ && !cmd->stdout_to_stderr
+ && cmd->out < 0;
+ if (need_out) {
+ if (pipe(fdout) < 0) {
+ if (need_in)
+ close_pair(fdin);
+ else if (cmd->in)
+ close(cmd->in);
+ return -ERR_RUN_COMMAND_PIPE;
+ }
+ cmd->out = fdout[0];
+ }
+
+ need_err = !cmd->no_stderr && cmd->err < 0;
+ if (need_err) {
+ if (pipe(fderr) < 0) {
+ if (need_in)
+ close_pair(fdin);
+ else if (cmd->in)
+ close(cmd->in);
+ if (need_out)
+ close_pair(fdout);
+ else if (cmd->out)
+ close(cmd->out);
+ return -ERR_RUN_COMMAND_PIPE;
+ }
+ cmd->err = fderr[0];
+ }
+
+#ifndef __MINGW32__
+ fflush(NULL);
+ cmd->pid = fork();
+ if (!cmd->pid) {
+ if (cmd->no_stdin)
+ dup_devnull(0);
+ else if (need_in) {
+ dup2(fdin[0], 0);
+ close_pair(fdin);
+ } else if (cmd->in) {
+ dup2(cmd->in, 0);
+ close(cmd->in);
+ }
+
+ if (cmd->no_stderr)
+ dup_devnull(2);
+ else if (need_err) {
+ dup2(fderr[1], 2);
+ close_pair(fderr);
+ }
+
+ if (cmd->no_stdout)
+ dup_devnull(1);
+ else if (cmd->stdout_to_stderr)
+ dup2(2, 1);
+ else if (need_out) {
+ dup2(fdout[1], 1);
+ close_pair(fdout);
+ } else if (cmd->out > 1) {
+ dup2(cmd->out, 1);
+ close(cmd->out);
+ }
+
+ if (cmd->dir && chdir(cmd->dir))
+ die("exec %s: cd to %s failed (%s)", cmd->argv[0],
+ cmd->dir, strerror(errno));
+ if (cmd->env) {
+ for (; *cmd->env; cmd->env++) {
+ if (strchr(*cmd->env, '='))
+ putenv((char*)*cmd->env);
+ else
+ unsetenv(*cmd->env);
+ }
+ }
+ if (cmd->preexec_cb)
+ cmd->preexec_cb();
+ if (cmd->perf_cmd) {
+ execv_perf_cmd(cmd->argv);
+ } else {
+ execvp(cmd->argv[0], (char *const*) cmd->argv);
+ }
+ exit(127);
+ }
+#else
+ int s0 = -1, s1 = -1, s2 = -1; /* backups of stdin, stdout, stderr */
+ const char **sargv = cmd->argv;
+ char **env = environ;
+
+ if (cmd->no_stdin) {
+ s0 = dup(0);
+ dup_devnull(0);
+ } else if (need_in) {
+ s0 = dup(0);
+ dup2(fdin[0], 0);
+ } else if (cmd->in) {
+ s0 = dup(0);
+ dup2(cmd->in, 0);
+ }
+
+ if (cmd->no_stderr) {
+ s2 = dup(2);
+ dup_devnull(2);
+ } else if (need_err) {
+ s2 = dup(2);
+ dup2(fderr[1], 2);
+ }
+
+ if (cmd->no_stdout) {
+ s1 = dup(1);
+ dup_devnull(1);
+ } else if (cmd->stdout_to_stderr) {
+ s1 = dup(1);
+ dup2(2, 1);
+ } else if (need_out) {
+ s1 = dup(1);
+ dup2(fdout[1], 1);
+ } else if (cmd->out > 1) {
+ s1 = dup(1);
+ dup2(cmd->out, 1);
+ }
+
+ if (cmd->dir)
+ die("chdir in start_command() not implemented");
+ if (cmd->env) {
+ env = copy_environ();
+ for (; *cmd->env; cmd->env++)
+ env = env_setenv(env, *cmd->env);
+ }
+
+ if (cmd->perf_cmd) {
+ cmd->argv = prepare_perf_cmd(cmd->argv);
+ }
+
+ cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env);
+
+ if (cmd->env)
+ free_environ(env);
+ if (cmd->perf_cmd)
+ free(cmd->argv);
+
+ cmd->argv = sargv;
+ if (s0 >= 0)
+ dup2(s0, 0), close(s0);
+ if (s1 >= 0)
+ dup2(s1, 1), close(s1);
+ if (s2 >= 0)
+ dup2(s2, 2), close(s2);
+#endif
+
+ if (cmd->pid < 0) {
+ int err = errno;
+ if (need_in)
+ close_pair(fdin);
+ else if (cmd->in)
+ close(cmd->in);
+ if (need_out)
+ close_pair(fdout);
+ else if (cmd->out)
+ close(cmd->out);
+ if (need_err)
+ close_pair(fderr);
+ return err == ENOENT ?
+ -ERR_RUN_COMMAND_EXEC :
+ -ERR_RUN_COMMAND_FORK;
+ }
+
+ if (need_in)
+ close(fdin[0]);
+ else if (cmd->in)
+ close(cmd->in);
+
+ if (need_out)
+ close(fdout[1]);
+ else if (cmd->out)
+ close(cmd->out);
+
+ if (need_err)
+ close(fderr[1]);
+
+ return 0;
+}
+
+static int wait_or_whine(pid_t pid)
+{
+ for (;;) {
+ int status, code;
+ pid_t waiting = waitpid(pid, &status, 0);
+
+ if (waiting < 0) {
+ if (errno == EINTR)
+ continue;
+ error("waitpid failed (%s)", strerror(errno));
+ return -ERR_RUN_COMMAND_WAITPID;
+ }
+ if (waiting != pid)
+ return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
+ if (WIFSIGNALED(status))
+ return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
+
+ if (!WIFEXITED(status))
+ return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
+ code = WEXITSTATUS(status);
+ switch (code) {
+ case 127:
+ return -ERR_RUN_COMMAND_EXEC;
+ case 0:
+ return 0;
+ default:
+ return -code;
+ }
+ }
+}
+
+int finish_command(struct child_process *cmd)
+{
+ return wait_or_whine(cmd->pid);
+}
+
+int run_command(struct child_process *cmd)
+{
+ int code = start_command(cmd);
+ if (code)
+ return code;
+ return finish_command(cmd);
+}
+
+static void prepare_run_command_v_opt(struct child_process *cmd,
+ const char **argv,
+ int opt)
+{
+ memset(cmd, 0, sizeof(*cmd));
+ cmd->argv = argv;
+ cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
+ cmd->perf_cmd = opt & RUN_PERF_CMD ? 1 : 0;
+ cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
+}
+
+int run_command_v_opt(const char **argv, int opt)
+{
+ struct child_process cmd;
+ prepare_run_command_v_opt(&cmd, argv, opt);
+ return run_command(&cmd);
+}
+
+int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env)
+{
+ struct child_process cmd;
+ prepare_run_command_v_opt(&cmd, argv, opt);
+ cmd.dir = dir;
+ cmd.env = env;
+ return run_command(&cmd);
+}
+
+#ifdef __MINGW32__
+static __stdcall unsigned run_thread(void *data)
+{
+ struct async *async = data;
+ return async->proc(async->fd_for_proc, async->data);
+}
+#endif
+
+int start_async(struct async *async)
+{
+ int pipe_out[2];
+
+ if (pipe(pipe_out) < 0)
+ return error("cannot create pipe: %s", strerror(errno));
+ async->out = pipe_out[0];
+
+#ifndef __MINGW32__
+ /* Flush stdio before fork() to avoid cloning buffers */
+ fflush(NULL);
+
+ async->pid = fork();
+ if (async->pid < 0) {
+ error("fork (async) failed: %s", strerror(errno));
+ close_pair(pipe_out);
+ return -1;
+ }
+ if (!async->pid) {
+ close(pipe_out[0]);
+ exit(!!async->proc(pipe_out[1], async->data));
+ }
+ close(pipe_out[1]);
+#else
+ async->fd_for_proc = pipe_out[1];
+ async->tid = (HANDLE) _beginthreadex(NULL, 0, run_thread, async, 0, NULL);
+ if (!async->tid) {
+ error("cannot create thread: %s", strerror(errno));
+ close_pair(pipe_out);
+ return -1;
+ }
+#endif
+ return 0;
+}
+
+int finish_async(struct async *async)
+{
+#ifndef __MINGW32__
+ int ret = 0;
+
+ if (wait_or_whine(async->pid))
+ ret = error("waitpid (async) failed");
+#else
+ DWORD ret = 0;
+ if (WaitForSingleObject(async->tid, INFINITE) != WAIT_OBJECT_0)
+ ret = error("waiting for thread failed: %lu", GetLastError());
+ else if (!GetExitCodeThread(async->tid, &ret))
+ ret = error("cannot get thread exit code: %lu", GetLastError());
+ CloseHandle(async->tid);
+#endif
+ return ret;
+}
+
+int run_hook(const char *index_file, const char *name, ...)
+{
+ struct child_process hook;
+ const char **argv = NULL, *env[2];
+ char index[PATH_MAX];
+ va_list args;
+ int ret;
+ size_t i = 0, alloc = 0;
+
+ if (access(perf_path("hooks/%s", name), X_OK) < 0)
+ return 0;
+
+ va_start(args, name);
+ ALLOC_GROW(argv, i + 1, alloc);
+ argv[i++] = perf_path("hooks/%s", name);
+ while (argv[i-1]) {
+ ALLOC_GROW(argv, i + 1, alloc);
+ argv[i++] = va_arg(args, const char *);
+ }
+ va_end(args);
+
+ memset(&hook, 0, sizeof(hook));
+ hook.argv = argv;
+ hook.no_stdin = 1;
+ hook.stdout_to_stderr = 1;
+ if (index_file) {
+ snprintf(index, sizeof(index), "PERF_INDEX_FILE=%s", index_file);
+ env[0] = index;
+ env[1] = NULL;
+ hook.env = env;
+ }
+
+ ret = start_command(&hook);
+ free(argv);
+ if (ret) {
+ warning("Could not spawn %s", argv[0]);
+ return ret;
+ }
+ ret = finish_command(&hook);
+ if (ret == -ERR_RUN_COMMAND_WAITPID_SIGNAL)
+ warning("%s exited due to uncaught signal", argv[0]);
+
+ return ret;
+}
--- /dev/null
+#ifndef RUN_COMMAND_H
+#define RUN_COMMAND_H
+
+enum {
+ ERR_RUN_COMMAND_FORK = 10000,
+ ERR_RUN_COMMAND_EXEC,
+ ERR_RUN_COMMAND_PIPE,
+ ERR_RUN_COMMAND_WAITPID,
+ ERR_RUN_COMMAND_WAITPID_WRONG_PID,
+ ERR_RUN_COMMAND_WAITPID_SIGNAL,
+ ERR_RUN_COMMAND_WAITPID_NOEXIT,
+};
+#define IS_RUN_COMMAND_ERR(x) (-(x) >= ERR_RUN_COMMAND_FORK)
+
+struct child_process {
+ const char **argv;
+ pid_t pid;
+ /*
+ * Using .in, .out, .err:
+ * - Specify 0 for no redirections (child inherits stdin, stdout,
+ * stderr from parent).
+ * - Specify -1 to have a pipe allocated as follows:
+ * .in: returns the writable pipe end; parent writes to it,
+ * the readable pipe end becomes child's stdin
+ * .out, .err: returns the readable pipe end; parent reads from
+ * it, the writable pipe end becomes child's stdout/stderr
+ * The caller of start_command() must close the returned FDs
+ * after it has completed reading from/writing to it!
+ * - Specify > 0 to set a channel to a particular FD as follows:
+ * .in: a readable FD, becomes child's stdin
+ * .out: a writable FD, becomes child's stdout/stderr
+ * .err > 0 not supported
+ * The specified FD is closed by start_command(), even in case
+ * of errors!
+ */
+ int in;
+ int out;
+ int err;
+ const char *dir;
+ const char *const *env;
+ unsigned no_stdin:1;
+ unsigned no_stdout:1;
+ unsigned no_stderr:1;
+ unsigned perf_cmd:1; /* if this is to be perf sub-command */
+ unsigned stdout_to_stderr:1;
+ void (*preexec_cb)(void);
+};
+
+int start_command(struct child_process *);
+int finish_command(struct child_process *);
+int run_command(struct child_process *);
+
+extern int run_hook(const char *index_file, const char *name, ...);
+
+#define RUN_COMMAND_NO_STDIN 1
+#define RUN_PERF_CMD 2 /*If this is to be perf sub-command */
+#define RUN_COMMAND_STDOUT_TO_STDERR 4
+int run_command_v_opt(const char **argv, int opt);
+
+/*
+ * env (the environment) is to be formatted like environ: "VAR=VALUE".
+ * To unset an environment variable use just "VAR".
+ */
+int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env);
+
+/*
+ * The purpose of the following functions is to feed a pipe by running
+ * a function asynchronously and providing output that the caller reads.
+ *
+ * It is expected that no synchronization and mutual exclusion between
+ * the caller and the feed function is necessary so that the function
+ * can run in a thread without interfering with the caller.
+ */
+struct async {
+ /*
+ * proc writes to fd and closes it;
+ * returns 0 on success, non-zero on failure
+ */
+ int (*proc)(int fd, void *data);
+ void *data;
+ int out; /* caller reads from here and closes it */
+#ifndef __MINGW32__
+ pid_t pid;
+#else
+ HANDLE tid;
+ int fd_for_proc;
+#endif
+};
+
+int start_async(struct async *async);
+int finish_async(struct async *async);
+
+#endif
--- /dev/null
+#include "sigchain.h"
+#include "cache.h"
+
+#define SIGCHAIN_MAX_SIGNALS 32
+
+struct sigchain_signal {
+ sigchain_fun *old;
+ int n;
+ int alloc;
+};
+static struct sigchain_signal signals[SIGCHAIN_MAX_SIGNALS];
+
+static void check_signum(int sig)
+{
+ if (sig < 1 || sig >= SIGCHAIN_MAX_SIGNALS)
+ die("BUG: signal out of range: %d", sig);
+}
+
+int sigchain_push(int sig, sigchain_fun f)
+{
+ struct sigchain_signal *s = signals + sig;
+ check_signum(sig);
+
+ ALLOC_GROW(s->old, s->n + 1, s->alloc);
+ s->old[s->n] = signal(sig, f);
+ if (s->old[s->n] == SIG_ERR)
+ return -1;
+ s->n++;
+ return 0;
+}
+
+int sigchain_pop(int sig)
+{
+ struct sigchain_signal *s = signals + sig;
+ check_signum(sig);
+ if (s->n < 1)
+ return 0;
+
+ if (signal(sig, s->old[s->n - 1]) == SIG_ERR)
+ return -1;
+ s->n--;
+ return 0;
+}
+
+void sigchain_push_common(sigchain_fun f)
+{
+ sigchain_push(SIGINT, f);
+ sigchain_push(SIGHUP, f);
+ sigchain_push(SIGTERM, f);
+ sigchain_push(SIGQUIT, f);
+ sigchain_push(SIGPIPE, f);
+}
--- /dev/null
+#ifndef SIGCHAIN_H
+#define SIGCHAIN_H
+
+typedef void (*sigchain_fun)(int);
+
+int sigchain_push(int sig, sigchain_fun f);
+int sigchain_pop(int sig);
+
+void sigchain_push_common(sigchain_fun f);
+
+#endif /* SIGCHAIN_H */
--- /dev/null
+#include "cache.h"
+
+int prefixcmp(const char *str, const char *prefix)
+{
+ for (; ; str++, prefix++)
+ if (!*prefix)
+ return 0;
+ else if (*str != *prefix)
+ return (unsigned char)*prefix - (unsigned char)*str;
+}
+
+/*
+ * Used as the default ->buf value, so that people can always assume
+ * buf is non NULL and ->buf is NUL terminated even for a freshly
+ * initialized strbuf.
+ */
+char strbuf_slopbuf[1];
+
+void strbuf_init(struct strbuf *sb, size_t hint)
+{
+ sb->alloc = sb->len = 0;
+ sb->buf = strbuf_slopbuf;
+ if (hint)
+ strbuf_grow(sb, hint);
+}
+
+void strbuf_release(struct strbuf *sb)
+{
+ if (sb->alloc) {
+ free(sb->buf);
+ strbuf_init(sb, 0);
+ }
+}
+
+char *strbuf_detach(struct strbuf *sb, size_t *sz)
+{
+ char *res = sb->alloc ? sb->buf : NULL;
+ if (sz)
+ *sz = sb->len;
+ strbuf_init(sb, 0);
+ return res;
+}
+
+void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
+{
+ strbuf_release(sb);
+ sb->buf = buf;
+ sb->len = len;
+ sb->alloc = alloc;
+ strbuf_grow(sb, 0);
+ sb->buf[sb->len] = '\0';
+}
+
+void strbuf_grow(struct strbuf *sb, size_t extra)
+{
+ if (sb->len + extra + 1 <= sb->len)
+ die("you want to use way too much memory");
+ if (!sb->alloc)
+ sb->buf = NULL;
+ ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
+}
+
+void strbuf_trim(struct strbuf *sb)
+{
+ char *b = sb->buf;
+ while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
+ sb->len--;
+ while (sb->len > 0 && isspace(*b)) {
+ b++;
+ sb->len--;
+ }
+ memmove(sb->buf, b, sb->len);
+ sb->buf[sb->len] = '\0';
+}
+void strbuf_rtrim(struct strbuf *sb)
+{
+ while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
+ sb->len--;
+ sb->buf[sb->len] = '\0';
+}
+
+void strbuf_ltrim(struct strbuf *sb)
+{
+ char *b = sb->buf;
+ while (sb->len > 0 && isspace(*b)) {
+ b++;
+ sb->len--;
+ }
+ memmove(sb->buf, b, sb->len);
+ sb->buf[sb->len] = '\0';
+}
+
+void strbuf_tolower(struct strbuf *sb)
+{
+ int i;
+ for (i = 0; i < sb->len; i++)
+ sb->buf[i] = tolower(sb->buf[i]);
+}
+
+struct strbuf **strbuf_split(const struct strbuf *sb, int delim)
+{
+ int alloc = 2, pos = 0;
+ char *n, *p;
+ struct strbuf **ret;
+ struct strbuf *t;
+
+ ret = calloc(alloc, sizeof(struct strbuf *));
+ p = n = sb->buf;
+ while (n < sb->buf + sb->len) {
+ int len;
+ n = memchr(n, delim, sb->len - (n - sb->buf));
+ if (pos + 1 >= alloc) {
+ alloc = alloc * 2;
+ ret = realloc(ret, sizeof(struct strbuf *) * alloc);
+ }
+ if (!n)
+ n = sb->buf + sb->len - 1;
+ len = n - p + 1;
+ t = malloc(sizeof(struct strbuf));
+ strbuf_init(t, len);
+ strbuf_add(t, p, len);
+ ret[pos] = t;
+ ret[++pos] = NULL;
+ p = ++n;
+ }
+ return ret;
+}
+
+void strbuf_list_free(struct strbuf **sbs)
+{
+ struct strbuf **s = sbs;
+
+ while (*s) {
+ strbuf_release(*s);
+ free(*s++);
+ }
+ free(sbs);
+}
+
+int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
+{
+ int len = a->len < b->len ? a->len: b->len;
+ int cmp = memcmp(a->buf, b->buf, len);
+ if (cmp)
+ return cmp;
+ return a->len < b->len ? -1: a->len != b->len;
+}
+
+void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
+ const void *data, size_t dlen)
+{
+ if (pos + len < pos)
+ die("you want to use way too much memory");
+ if (pos > sb->len)
+ die("`pos' is too far after the end of the buffer");
+ if (pos + len > sb->len)
+ die("`pos + len' is too far after the end of the buffer");
+
+ if (dlen >= len)
+ strbuf_grow(sb, dlen - len);
+ memmove(sb->buf + pos + dlen,
+ sb->buf + pos + len,
+ sb->len - pos - len);
+ memcpy(sb->buf + pos, data, dlen);
+ strbuf_setlen(sb, sb->len + dlen - len);
+}
+
+void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
+{
+ strbuf_splice(sb, pos, 0, data, len);
+}
+
+void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
+{
+ strbuf_splice(sb, pos, len, NULL, 0);
+}
+
+void strbuf_add(struct strbuf *sb, const void *data, size_t len)
+{
+ strbuf_grow(sb, len);
+ memcpy(sb->buf + sb->len, data, len);
+ strbuf_setlen(sb, sb->len + len);
+}
+
+void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
+{
+ strbuf_grow(sb, len);
+ memcpy(sb->buf + sb->len, sb->buf + pos, len);
+ strbuf_setlen(sb, sb->len + len);
+}
+
+void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
+{
+ int len;
+ va_list ap;
+
+ if (!strbuf_avail(sb))
+ strbuf_grow(sb, 64);
+ va_start(ap, fmt);
+ len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
+ va_end(ap);
+ if (len < 0)
+ die("your vsnprintf is broken");
+ if (len > strbuf_avail(sb)) {
+ strbuf_grow(sb, len);
+ va_start(ap, fmt);
+ len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
+ va_end(ap);
+ if (len > strbuf_avail(sb)) {
+ die("this should not happen, your snprintf is broken");
+ }
+ }
+ strbuf_setlen(sb, sb->len + len);
+}
+
+void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
+ void *context)
+{
+ for (;;) {
+ const char *percent;
+ size_t consumed;
+
+ percent = strchrnul(format, '%');
+ strbuf_add(sb, format, percent - format);
+ if (!*percent)
+ break;
+ format = percent + 1;
+
+ consumed = fn(sb, format, context);
+ if (consumed)
+ format += consumed;
+ else
+ strbuf_addch(sb, '%');
+ }
+}
+
+size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
+ void *context)
+{
+ struct strbuf_expand_dict_entry *e = context;
+ size_t len;
+
+ for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
+ if (!strncmp(placeholder, e->placeholder, len)) {
+ if (e->value)
+ strbuf_addstr(sb, e->value);
+ return len;
+ }
+ }
+ return 0;
+}
+
+size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
+{
+ size_t res;
+ size_t oldalloc = sb->alloc;
+
+ strbuf_grow(sb, size);
+ res = fread(sb->buf + sb->len, 1, size, f);
+ if (res > 0)
+ strbuf_setlen(sb, sb->len + res);
+ else if (res < 0 && oldalloc == 0)
+ strbuf_release(sb);
+ return res;
+}
+
+ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
+{
+ size_t oldlen = sb->len;
+ size_t oldalloc = sb->alloc;
+
+ strbuf_grow(sb, hint ? hint : 8192);
+ for (;;) {
+ ssize_t cnt;
+
+ cnt = read(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
+ if (cnt < 0) {
+ if (oldalloc == 0)
+ strbuf_release(sb);
+ else
+ strbuf_setlen(sb, oldlen);
+ return -1;
+ }
+ if (!cnt)
+ break;
+ sb->len += cnt;
+ strbuf_grow(sb, 8192);
+ }
+
+ sb->buf[sb->len] = '\0';
+ return sb->len - oldlen;
+}
+
+#define STRBUF_MAXLINK (2*PATH_MAX)
+
+int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
+{
+ size_t oldalloc = sb->alloc;
+
+ if (hint < 32)
+ hint = 32;
+
+ while (hint < STRBUF_MAXLINK) {
+ int len;
+
+ strbuf_grow(sb, hint);
+ len = readlink(path, sb->buf, hint);
+ if (len < 0) {
+ if (errno != ERANGE)
+ break;
+ } else if (len < hint) {
+ strbuf_setlen(sb, len);
+ return 0;
+ }
+
+ /* .. the buffer was too small - try again */
+ hint *= 2;
+ }
+ if (oldalloc == 0)
+ strbuf_release(sb);
+ return -1;
+}
+
+int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
+{
+ int ch;
+
+ strbuf_grow(sb, 0);
+ if (feof(fp))
+ return EOF;
+
+ strbuf_reset(sb);
+ while ((ch = fgetc(fp)) != EOF) {
+ if (ch == term)
+ break;
+ strbuf_grow(sb, 1);
+ sb->buf[sb->len++] = ch;
+ }
+ if (ch == EOF && sb->len == 0)
+ return EOF;
+
+ sb->buf[sb->len] = '\0';
+ return 0;
+}
+
+int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
+{
+ int fd, len;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return -1;
+ len = strbuf_read(sb, fd, hint);
+ close(fd);
+ if (len < 0)
+ return -1;
+
+ return len;
+}
--- /dev/null
+#ifndef STRBUF_H
+#define STRBUF_H
+
+/*
+ * Strbuf's can be use in many ways: as a byte array, or to store arbitrary
+ * long, overflow safe strings.
+ *
+ * Strbufs has some invariants that are very important to keep in mind:
+ *
+ * 1. the ->buf member is always malloc-ed, hence strbuf's can be used to
+ * build complex strings/buffers whose final size isn't easily known.
+ *
+ * It is NOT legal to copy the ->buf pointer away.
+ * `strbuf_detach' is the operation that detachs a buffer from its shell
+ * while keeping the shell valid wrt its invariants.
+ *
+ * 2. the ->buf member is a byte array that has at least ->len + 1 bytes
+ * allocated. The extra byte is used to store a '\0', allowing the ->buf
+ * member to be a valid C-string. Every strbuf function ensure this
+ * invariant is preserved.
+ *
+ * Note that it is OK to "play" with the buffer directly if you work it
+ * that way:
+ *
+ * strbuf_grow(sb, SOME_SIZE);
+ * ... Here, the memory array starting at sb->buf, and of length
+ * ... strbuf_avail(sb) is all yours, and you are sure that
+ * ... strbuf_avail(sb) is at least SOME_SIZE.
+ * strbuf_setlen(sb, sb->len + SOME_OTHER_SIZE);
+ *
+ * Of course, SOME_OTHER_SIZE must be smaller or equal to strbuf_avail(sb).
+ *
+ * Doing so is safe, though if it has to be done in many places, adding the
+ * missing API to the strbuf module is the way to go.
+ *
+ * XXX: do _not_ assume that the area that is yours is of size ->alloc - 1
+ * even if it's true in the current implementation. Alloc is somehow a
+ * "private" member that should not be messed with.
+ */
+
+#include <assert.h>
+
+extern char strbuf_slopbuf[];
+struct strbuf {
+ size_t alloc;
+ size_t len;
+ char *buf;
+};
+
+#define STRBUF_INIT { 0, 0, strbuf_slopbuf }
+
+/*----- strbuf life cycle -----*/
+extern void strbuf_init(struct strbuf *, size_t);
+extern void strbuf_release(struct strbuf *);
+extern char *strbuf_detach(struct strbuf *, size_t *);
+extern void strbuf_attach(struct strbuf *, void *, size_t, size_t);
+static inline void strbuf_swap(struct strbuf *a, struct strbuf *b) {
+ struct strbuf tmp = *a;
+ *a = *b;
+ *b = tmp;
+}
+
+/*----- strbuf size related -----*/
+static inline size_t strbuf_avail(const struct strbuf *sb) {
+ return sb->alloc ? sb->alloc - sb->len - 1 : 0;
+}
+
+extern void strbuf_grow(struct strbuf *, size_t);
+
+static inline void strbuf_setlen(struct strbuf *sb, size_t len) {
+ if (!sb->alloc)
+ strbuf_grow(sb, 0);
+ assert(len < sb->alloc);
+ sb->len = len;
+ sb->buf[len] = '\0';
+}
+#define strbuf_reset(sb) strbuf_setlen(sb, 0)
+
+/*----- content related -----*/
+extern void strbuf_trim(struct strbuf *);
+extern void strbuf_rtrim(struct strbuf *);
+extern void strbuf_ltrim(struct strbuf *);
+extern int strbuf_cmp(const struct strbuf *, const struct strbuf *);
+extern void strbuf_tolower(struct strbuf *);
+
+extern struct strbuf **strbuf_split(const struct strbuf *, int delim);
+extern void strbuf_list_free(struct strbuf **);
+
+/*----- add data in your buffer -----*/
+static inline void strbuf_addch(struct strbuf *sb, int c) {
+ strbuf_grow(sb, 1);
+ sb->buf[sb->len++] = c;
+ sb->buf[sb->len] = '\0';
+}
+
+extern void strbuf_insert(struct strbuf *, size_t pos, const void *, size_t);
+extern void strbuf_remove(struct strbuf *, size_t pos, size_t len);
+
+/* splice pos..pos+len with given data */
+extern void strbuf_splice(struct strbuf *, size_t pos, size_t len,
+ const void *, size_t);
+
+extern void strbuf_add(struct strbuf *, const void *, size_t);
+static inline void strbuf_addstr(struct strbuf *sb, const char *s) {
+ strbuf_add(sb, s, strlen(s));
+}
+static inline void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2) {
+ strbuf_add(sb, sb2->buf, sb2->len);
+}
+extern void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len);
+
+typedef size_t (*expand_fn_t) (struct strbuf *sb, const char *placeholder, void *context);
+extern void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn, void *context);
+struct strbuf_expand_dict_entry {
+ const char *placeholder;
+ const char *value;
+};
+extern size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder, void *context);
+
+__attribute__((format(printf,2,3)))
+extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...);
+
+extern size_t strbuf_fread(struct strbuf *, size_t, FILE *);
+/* XXX: if read fails, any partial read is undone */
+extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
+extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
+extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
+
+extern int strbuf_getline(struct strbuf *, FILE *, int);
+
+extern void stripspace(struct strbuf *buf, int skip_comments);
+extern int launch_editor(const char *path, struct strbuf *buffer, const char *const *env);
+
+extern int strbuf_branchname(struct strbuf *sb, const char *name);
+extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
+
+#endif /* STRBUF_H */
--- /dev/null
+#include "string.h"
+
+static int hex(char ch)
+{
+ if ((ch >= '0') && (ch <= '9'))
+ return ch - '0';
+ if ((ch >= 'a') && (ch <= 'f'))
+ return ch - 'a' + 10;
+ if ((ch >= 'A') && (ch <= 'F'))
+ return ch - 'A' + 10;
+ return -1;
+}
+
+/*
+ * While we find nice hex chars, build a long_val.
+ * Return number of chars processed.
+ */
+int hex2u64(const char *ptr, __u64 *long_val)
+{
+ const char *p = ptr;
+ *long_val = 0;
+
+ while (*p) {
+ const int hex_val = hex(*p);
+
+ if (hex_val < 0)
+ break;
+
+ *long_val = (*long_val << 4) | hex_val;
+ p++;
+ }
+
+ return p - ptr;
+}
--- /dev/null
+#ifndef _PERF_STRING_H_
+#define _PERF_STRING_H_
+
+#include <linux/types.h>
+
+int hex2u64(const char *ptr, __u64 *val);
+
+#endif
--- /dev/null
+#include "util.h"
+#include "../perf.h"
+#include "string.h"
+#include "symbol.h"
+
+#include <libelf.h>
+#include <gelf.h>
+#include <elf.h>
+
+const char *sym_hist_filter;
+
+static struct symbol *symbol__new(__u64 start, __u64 len,
+ const char *name, unsigned int priv_size,
+ __u64 obj_start, int verbose)
+{
+ size_t namelen = strlen(name) + 1;
+ struct symbol *self = calloc(1, priv_size + sizeof(*self) + namelen);
+
+ if (!self)
+ return NULL;
+
+ if (verbose >= 2)
+ printf("new symbol: %016Lx [%08lx]: %s, hist: %p, obj_start: %p\n",
+ (__u64)start, (unsigned long)len, name, self->hist, (void *)(unsigned long)obj_start);
+
+ self->obj_start= obj_start;
+ self->hist = NULL;
+ self->hist_sum = 0;
+
+ if (sym_hist_filter && !strcmp(name, sym_hist_filter))
+ self->hist = calloc(sizeof(__u64), len);
+
+ if (priv_size) {
+ memset(self, 0, priv_size);
+ self = ((void *)self) + priv_size;
+ }
+ self->start = start;
+ self->end = start + len - 1;
+ memcpy(self->name, name, namelen);
+
+ return self;
+}
+
+static void symbol__delete(struct symbol *self, unsigned int priv_size)
+{
+ free(((void *)self) - priv_size);
+}
+
+static size_t symbol__fprintf(struct symbol *self, FILE *fp)
+{
+ return fprintf(fp, " %llx-%llx %s\n",
+ self->start, self->end, self->name);
+}
+
+struct dso *dso__new(const char *name, unsigned int sym_priv_size)
+{
+ struct dso *self = malloc(sizeof(*self) + strlen(name) + 1);
+
+ if (self != NULL) {
+ strcpy(self->name, name);
+ self->syms = RB_ROOT;
+ self->sym_priv_size = sym_priv_size;
+ self->find_symbol = dso__find_symbol;
+ }
+
+ return self;
+}
+
+static void dso__delete_symbols(struct dso *self)
+{
+ struct symbol *pos;
+ struct rb_node *next = rb_first(&self->syms);
+
+ while (next) {
+ pos = rb_entry(next, struct symbol, rb_node);
+ next = rb_next(&pos->rb_node);
+ rb_erase(&pos->rb_node, &self->syms);
+ symbol__delete(pos, self->sym_priv_size);
+ }
+}
+
+void dso__delete(struct dso *self)
+{
+ dso__delete_symbols(self);
+ free(self);
+}
+
+static void dso__insert_symbol(struct dso *self, struct symbol *sym)
+{
+ struct rb_node **p = &self->syms.rb_node;
+ struct rb_node *parent = NULL;
+ const __u64 ip = sym->start;
+ struct symbol *s;
+
+ while (*p != NULL) {
+ parent = *p;
+ s = rb_entry(parent, struct symbol, rb_node);
+ if (ip < s->start)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+ rb_link_node(&sym->rb_node, parent, p);
+ rb_insert_color(&sym->rb_node, &self->syms);
+}
+
+struct symbol *dso__find_symbol(struct dso *self, __u64 ip)
+{
+ struct rb_node *n;
+
+ if (self == NULL)
+ return NULL;
+
+ n = self->syms.rb_node;
+
+ while (n) {
+ struct symbol *s = rb_entry(n, struct symbol, rb_node);
+
+ if (ip < s->start)
+ n = n->rb_left;
+ else if (ip > s->end)
+ n = n->rb_right;
+ else
+ return s;
+ }
+
+ return NULL;
+}
+
+size_t dso__fprintf(struct dso *self, FILE *fp)
+{
+ size_t ret = fprintf(fp, "dso: %s\n", self->name);
+
+ struct rb_node *nd;
+ for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
+ struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
+ ret += symbol__fprintf(pos, fp);
+ }
+
+ return ret;
+}
+
+static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int verbose)
+{
+ struct rb_node *nd, *prevnd;
+ char *line = NULL;
+ size_t n;
+ FILE *file = fopen("/proc/kallsyms", "r");
+
+ if (file == NULL)
+ goto out_failure;
+
+ while (!feof(file)) {
+ __u64 start;
+ struct symbol *sym;
+ int line_len, len;
+ char symbol_type;
+
+ line_len = getline(&line, &n, file);
+ if (line_len < 0)
+ break;
+
+ if (!line)
+ goto out_failure;
+
+ line[--line_len] = '\0'; /* \n */
+
+ len = hex2u64(line, &start);
+
+ len++;
+ if (len + 2 >= line_len)
+ continue;
+
+ symbol_type = toupper(line[len]);
+ /*
+ * We're interested only in code ('T'ext)
+ */
+ if (symbol_type != 'T' && symbol_type != 'W')
+ continue;
+ /*
+ * Well fix up the end later, when we have all sorted.
+ */
+ sym = symbol__new(start, 0xdead, line + len + 2,
+ self->sym_priv_size, 0, verbose);
+
+ if (sym == NULL)
+ goto out_delete_line;
+
+ if (filter && filter(self, sym))
+ symbol__delete(sym, self->sym_priv_size);
+ else
+ dso__insert_symbol(self, sym);
+ }
+
+ /*
+ * Now that we have all sorted out, just set the ->end of all
+ * symbols
+ */
+ prevnd = rb_first(&self->syms);
+
+ if (prevnd == NULL)
+ goto out_delete_line;
+
+ for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
+ struct symbol *prev = rb_entry(prevnd, struct symbol, rb_node),
+ *curr = rb_entry(nd, struct symbol, rb_node);
+
+ prev->end = curr->start - 1;
+ prevnd = nd;
+ }
+
+ free(line);
+ fclose(file);
+
+ return 0;
+
+out_delete_line:
+ free(line);
+out_failure:
+ return -1;
+}
+
+static int dso__load_perf_map(struct dso *self, symbol_filter_t filter, int verbose)
+{
+ char *line = NULL;
+ size_t n;
+ FILE *file;
+ int nr_syms = 0;
+
+ file = fopen(self->name, "r");
+ if (file == NULL)
+ goto out_failure;
+
+ while (!feof(file)) {
+ __u64 start, size;
+ struct symbol *sym;
+ int line_len, len;
+
+ line_len = getline(&line, &n, file);
+ if (line_len < 0)
+ break;
+
+ if (!line)
+ goto out_failure;
+
+ line[--line_len] = '\0'; /* \n */
+
+ len = hex2u64(line, &start);
+
+ len++;
+ if (len + 2 >= line_len)
+ continue;
+
+ len += hex2u64(line + len, &size);
+
+ len++;
+ if (len + 2 >= line_len)
+ continue;
+
+ sym = symbol__new(start, size, line + len,
+ self->sym_priv_size, start, verbose);
+
+ if (sym == NULL)
+ goto out_delete_line;
+
+ if (filter && filter(self, sym))
+ symbol__delete(sym, self->sym_priv_size);
+ else {
+ dso__insert_symbol(self, sym);
+ nr_syms++;
+ }
+ }
+
+ free(line);
+ fclose(file);
+
+ return nr_syms;
+
+out_delete_line:
+ free(line);
+out_failure:
+ return -1;
+}
+
+/**
+ * elf_symtab__for_each_symbol - iterate thru all the symbols
+ *
+ * @self: struct elf_symtab instance to iterate
+ * @index: uint32_t index
+ * @sym: GElf_Sym iterator
+ */
+#define elf_symtab__for_each_symbol(syms, nr_syms, index, sym) \
+ for (index = 0, gelf_getsym(syms, index, &sym);\
+ index < nr_syms; \
+ index++, gelf_getsym(syms, index, &sym))
+
+static inline uint8_t elf_sym__type(const GElf_Sym *sym)
+{
+ return GELF_ST_TYPE(sym->st_info);
+}
+
+static inline int elf_sym__is_function(const GElf_Sym *sym)
+{
+ return elf_sym__type(sym) == STT_FUNC &&
+ sym->st_name != 0 &&
+ sym->st_shndx != SHN_UNDEF &&
+ sym->st_size != 0;
+}
+
+static inline const char *elf_sym__name(const GElf_Sym *sym,
+ const Elf_Data *symstrs)
+{
+ return symstrs->d_buf + sym->st_name;
+}
+
+static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
+ GElf_Shdr *shp, const char *name,
+ size_t *index)
+{
+ Elf_Scn *sec = NULL;
+ size_t cnt = 1;
+
+ while ((sec = elf_nextscn(elf, sec)) != NULL) {
+ char *str;
+
+ gelf_getshdr(sec, shp);
+ str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
+ if (!strcmp(name, str)) {
+ if (index)
+ *index = cnt;
+ break;
+ }
+ ++cnt;
+ }
+
+ return sec;
+}
+
+#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
+ for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
+ idx < nr_entries; \
+ ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
+
+#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
+ for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
+ idx < nr_entries; \
+ ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
+
+static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
+ GElf_Ehdr *ehdr, Elf_Scn *scn_dynsym,
+ GElf_Shdr *shdr_dynsym,
+ size_t dynsym_idx, int verbose)
+{
+ uint32_t nr_rel_entries, idx;
+ GElf_Sym sym;
+ __u64 plt_offset;
+ GElf_Shdr shdr_plt;
+ struct symbol *f;
+ GElf_Shdr shdr_rel_plt;
+ Elf_Data *reldata, *syms, *symstrs;
+ Elf_Scn *scn_plt_rel, *scn_symstrs;
+ char sympltname[1024];
+ int nr = 0, symidx;
+
+ scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
+ ".rela.plt", NULL);
+ if (scn_plt_rel == NULL) {
+ scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
+ ".rel.plt", NULL);
+ if (scn_plt_rel == NULL)
+ return 0;
+ }
+
+ if (shdr_rel_plt.sh_link != dynsym_idx)
+ return 0;
+
+ if (elf_section_by_name(elf, ehdr, &shdr_plt, ".plt", NULL) == NULL)
+ return 0;
+
+ /*
+ * Fetch the relocation section to find the indexes to the GOT
+ * and the symbols in the .dynsym they refer to.
+ */
+ reldata = elf_getdata(scn_plt_rel, NULL);
+ if (reldata == NULL)
+ return -1;
+
+ syms = elf_getdata(scn_dynsym, NULL);
+ if (syms == NULL)
+ return -1;
+
+ scn_symstrs = elf_getscn(elf, shdr_dynsym->sh_link);
+ if (scn_symstrs == NULL)
+ return -1;
+
+ symstrs = elf_getdata(scn_symstrs, NULL);
+ if (symstrs == NULL)
+ return -1;
+
+ nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
+ plt_offset = shdr_plt.sh_offset;
+
+ if (shdr_rel_plt.sh_type == SHT_RELA) {
+ GElf_Rela pos_mem, *pos;
+
+ elf_section__for_each_rela(reldata, pos, pos_mem, idx,
+ nr_rel_entries) {
+ symidx = GELF_R_SYM(pos->r_info);
+ plt_offset += shdr_plt.sh_entsize;
+ gelf_getsym(syms, symidx, &sym);
+ snprintf(sympltname, sizeof(sympltname),
+ "%s@plt", elf_sym__name(&sym, symstrs));
+
+ f = symbol__new(plt_offset, shdr_plt.sh_entsize,
+ sympltname, self->sym_priv_size, 0, verbose);
+ if (!f)
+ return -1;
+
+ dso__insert_symbol(self, f);
+ ++nr;
+ }
+ } else if (shdr_rel_plt.sh_type == SHT_REL) {
+ GElf_Rel pos_mem, *pos;
+ elf_section__for_each_rel(reldata, pos, pos_mem, idx,
+ nr_rel_entries) {
+ symidx = GELF_R_SYM(pos->r_info);
+ plt_offset += shdr_plt.sh_entsize;
+ gelf_getsym(syms, symidx, &sym);
+ snprintf(sympltname, sizeof(sympltname),
+ "%s@plt", elf_sym__name(&sym, symstrs));
+
+ f = symbol__new(plt_offset, shdr_plt.sh_entsize,
+ sympltname, self->sym_priv_size, 0, verbose);
+ if (!f)
+ return -1;
+
+ dso__insert_symbol(self, f);
+ ++nr;
+ }
+ } else {
+ /*
+ * TODO: There are still one more shdr_rel_plt.sh_type
+ * I have to investigate, but probably should be ignored.
+ */
+ }
+
+ return nr;
+}
+
+static int dso__load_sym(struct dso *self, int fd, const char *name,
+ symbol_filter_t filter, int verbose)
+{
+ Elf_Data *symstrs;
+ uint32_t nr_syms;
+ int err = -1;
+ uint32_t index;
+ GElf_Ehdr ehdr;
+ GElf_Shdr shdr;
+ Elf_Data *syms;
+ GElf_Sym sym;
+ Elf_Scn *sec, *sec_dynsym;
+ Elf *elf;
+ size_t dynsym_idx;
+ int nr = 0;
+
+ elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
+ if (elf == NULL) {
+ if (verbose)
+ fprintf(stderr, "%s: cannot read %s ELF file.\n",
+ __func__, name);
+ goto out_close;
+ }
+
+ if (gelf_getehdr(elf, &ehdr) == NULL) {
+ if (verbose)
+ fprintf(stderr, "%s: cannot get elf header.\n", __func__);
+ goto out_elf_end;
+ }
+
+ /*
+ * We need to check if we have a .dynsym, so that we can handle the
+ * .plt, synthesizing its symbols, that aren't on the symtabs (be it
+ * .dynsym or .symtab)
+ */
+ sec_dynsym = elf_section_by_name(elf, &ehdr, &shdr,
+ ".dynsym", &dynsym_idx);
+ if (sec_dynsym != NULL) {
+ nr = dso__synthesize_plt_symbols(self, elf, &ehdr,
+ sec_dynsym, &shdr,
+ dynsym_idx, verbose);
+ if (nr < 0)
+ goto out_elf_end;
+ }
+
+ /*
+ * But if we have a full .symtab (that is a superset of .dynsym) we
+ * should add the symbols not in the .dynsyn
+ */
+ sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
+ if (sec == NULL) {
+ if (sec_dynsym == NULL)
+ goto out_elf_end;
+
+ sec = sec_dynsym;
+ gelf_getshdr(sec, &shdr);
+ }
+
+ syms = elf_getdata(sec, NULL);
+ if (syms == NULL)
+ goto out_elf_end;
+
+ sec = elf_getscn(elf, shdr.sh_link);
+ if (sec == NULL)
+ goto out_elf_end;
+
+ symstrs = elf_getdata(sec, NULL);
+ if (symstrs == NULL)
+ goto out_elf_end;
+
+ nr_syms = shdr.sh_size / shdr.sh_entsize;
+
+ memset(&sym, 0, sizeof(sym));
+
+ elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
+ struct symbol *f;
+ __u64 obj_start;
+
+ if (!elf_sym__is_function(&sym))
+ continue;
+
+ sec = elf_getscn(elf, sym.st_shndx);
+ if (!sec)
+ goto out_elf_end;
+
+ gelf_getshdr(sec, &shdr);
+ obj_start = sym.st_value;
+
+ sym.st_value -= shdr.sh_addr - shdr.sh_offset;
+
+ f = symbol__new(sym.st_value, sym.st_size,
+ elf_sym__name(&sym, symstrs),
+ self->sym_priv_size, obj_start, verbose);
+ if (!f)
+ goto out_elf_end;
+
+ if (filter && filter(self, f))
+ symbol__delete(f, self->sym_priv_size);
+ else {
+ dso__insert_symbol(self, f);
+ nr++;
+ }
+ }
+
+ err = nr;
+out_elf_end:
+ elf_end(elf);
+out_close:
+ return err;
+}
+
+int dso__load(struct dso *self, symbol_filter_t filter, int verbose)
+{
+ int size = strlen(self->name) + sizeof("/usr/lib/debug%s.debug");
+ char *name = malloc(size);
+ int variant = 0;
+ int ret = -1;
+ int fd;
+
+ if (!name)
+ return -1;
+
+ if (strncmp(self->name, "/tmp/perf-", 10) == 0)
+ return dso__load_perf_map(self, filter, verbose);
+
+more:
+ do {
+ switch (variant) {
+ case 0: /* Fedora */
+ snprintf(name, size, "/usr/lib/debug%s.debug", self->name);
+ break;
+ case 1: /* Ubuntu */
+ snprintf(name, size, "/usr/lib/debug%s", self->name);
+ break;
+ case 2: /* Sane people */
+ snprintf(name, size, "%s", self->name);
+ break;
+
+ default:
+ goto out;
+ }
+ variant++;
+
+ fd = open(name, O_RDONLY);
+ } while (fd < 0);
+
+ ret = dso__load_sym(self, fd, name, filter, verbose);
+ close(fd);
+
+ /*
+ * Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
+ */
+ if (!ret)
+ goto more;
+
+out:
+ free(name);
+ return ret;
+}
+
+static int dso__load_vmlinux(struct dso *self, const char *vmlinux,
+ symbol_filter_t filter, int verbose)
+{
+ int err, fd = open(vmlinux, O_RDONLY);
+
+ if (fd < 0)
+ return -1;
+
+ err = dso__load_sym(self, fd, vmlinux, filter, verbose);
+ close(fd);
+
+ return err;
+}
+
+int dso__load_kernel(struct dso *self, const char *vmlinux,
+ symbol_filter_t filter, int verbose)
+{
+ int err = -1;
+
+ if (vmlinux)
+ err = dso__load_vmlinux(self, vmlinux, filter, verbose);
+
+ if (err)
+ err = dso__load_kallsyms(self, filter, verbose);
+
+ return err;
+}
+
+void symbol__init(void)
+{
+ elf_version(EV_CURRENT);
+}
--- /dev/null
+#ifndef _PERF_SYMBOL_
+#define _PERF_SYMBOL_ 1
+
+#include <linux/types.h>
+#include "list.h"
+#include "rbtree.h"
+
+struct symbol {
+ struct rb_node rb_node;
+ __u64 start;
+ __u64 end;
+ __u64 obj_start;
+ __u64 hist_sum;
+ __u64 *hist;
+ char name[0];
+};
+
+struct dso {
+ struct list_head node;
+ struct rb_root syms;
+ unsigned int sym_priv_size;
+ struct symbol *(*find_symbol)(struct dso *, __u64 ip);
+ char name[0];
+};
+
+const char *sym_hist_filter;
+
+typedef int (*symbol_filter_t)(struct dso *self, struct symbol *sym);
+
+struct dso *dso__new(const char *name, unsigned int sym_priv_size);
+void dso__delete(struct dso *self);
+
+static inline void *dso__sym_priv(struct dso *self, struct symbol *sym)
+{
+ return ((void *)sym) - self->sym_priv_size;
+}
+
+struct symbol *dso__find_symbol(struct dso *self, __u64 ip);
+
+int dso__load_kernel(struct dso *self, const char *vmlinux,
+ symbol_filter_t filter, int verbose);
+int dso__load(struct dso *self, symbol_filter_t filter, int verbose);
+
+size_t dso__fprintf(struct dso *self, FILE *fp);
+
+void symbol__init(void);
+#endif /* _PERF_SYMBOL_ */
--- /dev/null
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "util.h"
+
+static void report(const char *prefix, const char *err, va_list params)
+{
+ char msg[1024];
+ vsnprintf(msg, sizeof(msg), err, params);
+ fprintf(stderr, " %s%s\n", prefix, msg);
+}
+
+static NORETURN void usage_builtin(const char *err)
+{
+ fprintf(stderr, "\n Usage: %s\n", err);
+ exit(129);
+}
+
+static NORETURN void die_builtin(const char *err, va_list params)
+{
+ report(" Fatal: ", err, params);
+ exit(128);
+}
+
+static void error_builtin(const char *err, va_list params)
+{
+ report(" Error: ", err, params);
+}
+
+static void warn_builtin(const char *warn, va_list params)
+{
+ report(" Warning: ", warn, params);
+}
+
+/* If we are in a dlopen()ed .so write to a global variable would segfault
+ * (ugh), so keep things static. */
+static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
+static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
+static void (*error_routine)(const char *err, va_list params) = error_builtin;
+static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
+
+void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
+{
+ die_routine = routine;
+}
+
+void usage(const char *err)
+{
+ usage_routine(err);
+}
+
+void die(const char *err, ...)
+{
+ va_list params;
+
+ va_start(params, err);
+ die_routine(err, params);
+ va_end(params);
+}
+
+int error(const char *err, ...)
+{
+ va_list params;
+
+ va_start(params, err);
+ error_routine(err, params);
+ va_end(params);
+ return -1;
+}
+
+void warning(const char *warn, ...)
+{
+ va_list params;
+
+ va_start(params, warn);
+ warn_routine(warn, params);
+ va_end(params);
+}
--- /dev/null
+#ifndef GIT_COMPAT_UTIL_H
+#define GIT_COMPAT_UTIL_H
+
+#define _FILE_OFFSET_BITS 64
+
+#ifndef FLEX_ARRAY
+/*
+ * See if our compiler is known to support flexible array members.
+ */
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+# define FLEX_ARRAY /* empty */
+#elif defined(__GNUC__)
+# if (__GNUC__ >= 3)
+# define FLEX_ARRAY /* empty */
+# else
+# define FLEX_ARRAY 0 /* older GNU extension */
+# endif
+#endif
+
+/*
+ * Otherwise, default to safer but a bit wasteful traditional style
+ */
+#ifndef FLEX_ARRAY
+# define FLEX_ARRAY 1
+#endif
+#endif
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
+#ifdef __GNUC__
+#define TYPEOF(x) (__typeof__(x))
+#else
+#define TYPEOF(x)
+#endif
+
+#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
+#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
+
+/* Approximation of the length of the decimal representation of this type. */
+#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
+
+#if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX)
+#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
+#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
+#endif
+#define _ALL_SOURCE 1
+#define _GNU_SOURCE 1
+#define _BSD_SOURCE 1
+
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <sys/time.h>
+#include <time.h>
+#include <signal.h>
+#include <fnmatch.h>
+#include <assert.h>
+#include <regex.h>
+#include <utime.h>
+#ifndef __MINGW32__
+#include <sys/wait.h>
+#include <sys/poll.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#ifndef NO_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <pwd.h>
+#include <inttypes.h>
+#if defined(__CYGWIN__)
+#undef _XOPEN_SOURCE
+#include <grp.h>
+#define _XOPEN_SOURCE 600
+#include "compat/cygwin.h"
+#else
+#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
+#include <grp.h>
+#define _ALL_SOURCE 1
+#endif
+#else /* __MINGW32__ */
+/* pull in Windows compatibility stuff */
+#include "compat/mingw.h"
+#endif /* __MINGW32__ */
+
+#ifndef NO_ICONV
+#include <iconv.h>
+#endif
+
+#ifndef NO_OPENSSL
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#endif
+
+/* On most systems <limits.h> would have given us this, but
+ * not on some systems (e.g. GNU/Hurd).
+ */
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
+#ifndef PRIuMAX
+#define PRIuMAX "llu"
+#endif
+
+#ifndef PRIu32
+#define PRIu32 "u"
+#endif
+
+#ifndef PRIx32
+#define PRIx32 "x"
+#endif
+
+#ifndef PATH_SEP
+#define PATH_SEP ':'
+#endif
+
+#ifndef STRIP_EXTENSION
+#define STRIP_EXTENSION ""
+#endif
+
+#ifndef has_dos_drive_prefix
+#define has_dos_drive_prefix(path) 0
+#endif
+
+#ifndef is_dir_sep
+#define is_dir_sep(c) ((c) == '/')
+#endif
+
+#ifdef __GNUC__
+#define NORETURN __attribute__((__noreturn__))
+#else
+#define NORETURN
+#ifndef __attribute__
+#define __attribute__(x)
+#endif
+#endif
+
+/* General helper functions */
+extern void usage(const char *err) NORETURN;
+extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
+extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
+extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
+
+extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
+
+extern int prefixcmp(const char *str, const char *prefix);
+extern time_t tm_to_time_t(const struct tm *tm);
+
+static inline const char *skip_prefix(const char *str, const char *prefix)
+{
+ size_t len = strlen(prefix);
+ return strncmp(str, prefix, len) ? NULL : str + len;
+}
+
+#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
+
+#ifndef PROT_READ
+#define PROT_READ 1
+#define PROT_WRITE 2
+#define MAP_PRIVATE 1
+#define MAP_FAILED ((void*)-1)
+#endif
+
+#define mmap git_mmap
+#define munmap git_munmap
+extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
+extern int git_munmap(void *start, size_t length);
+
+#else /* NO_MMAP || USE_WIN32_MMAP */
+
+#include <sys/mman.h>
+
+#endif /* NO_MMAP || USE_WIN32_MMAP */
+
+#ifdef NO_MMAP
+
+/* This value must be multiple of (pagesize * 2) */
+#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
+
+#else /* NO_MMAP */
+
+/* This value must be multiple of (pagesize * 2) */
+#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
+ (sizeof(void*) >= 8 \
+ ? 1 * 1024 * 1024 * 1024 \
+ : 32 * 1024 * 1024)
+
+#endif /* NO_MMAP */
+
+#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
+#define on_disk_bytes(st) ((st).st_size)
+#else
+#define on_disk_bytes(st) ((st).st_blocks * 512)
+#endif
+
+#define DEFAULT_PACKED_GIT_LIMIT \
+ ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
+
+#ifdef NO_PREAD
+#define pread git_pread
+extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
+#endif
+/*
+ * Forward decl that will remind us if its twin in cache.h changes.
+ * This function is used in compat/pread.c. But we can't include
+ * cache.h there.
+ */
+extern ssize_t read_in_full(int fd, void *buf, size_t count);
+
+#ifdef NO_SETENV
+#define setenv gitsetenv
+extern int gitsetenv(const char *, const char *, int);
+#endif
+
+#ifdef NO_MKDTEMP
+#define mkdtemp gitmkdtemp
+extern char *gitmkdtemp(char *);
+#endif
+
+#ifdef NO_UNSETENV
+#define unsetenv gitunsetenv
+extern void gitunsetenv(const char *);
+#endif
+
+#ifdef NO_STRCASESTR
+#define strcasestr gitstrcasestr
+extern char *gitstrcasestr(const char *haystack, const char *needle);
+#endif
+
+#ifdef NO_STRLCPY
+#define strlcpy gitstrlcpy
+extern size_t gitstrlcpy(char *, const char *, size_t);
+#endif
+
+#ifdef NO_STRTOUMAX
+#define strtoumax gitstrtoumax
+extern uintmax_t gitstrtoumax(const char *, char **, int);
+#endif
+
+#ifdef NO_HSTRERROR
+#define hstrerror githstrerror
+extern const char *githstrerror(int herror);
+#endif
+
+#ifdef NO_MEMMEM
+#define memmem gitmemmem
+void *gitmemmem(const void *haystack, size_t haystacklen,
+ const void *needle, size_t needlelen);
+#endif
+
+#ifdef FREAD_READS_DIRECTORIES
+#ifdef fopen
+#undef fopen
+#endif
+#define fopen(a,b) git_fopen(a,b)
+extern FILE *git_fopen(const char*, const char*);
+#endif
+
+#ifdef SNPRINTF_RETURNS_BOGUS
+#define snprintf git_snprintf
+extern int git_snprintf(char *str, size_t maxsize,
+ const char *format, ...);
+#define vsnprintf git_vsnprintf
+extern int git_vsnprintf(char *str, size_t maxsize,
+ const char *format, va_list ap);
+#endif
+
+#ifdef __GLIBC_PREREQ
+#if __GLIBC_PREREQ(2, 1)
+#define HAVE_STRCHRNUL
+#endif
+#endif
+
+#ifndef HAVE_STRCHRNUL
+#define strchrnul gitstrchrnul
+static inline char *gitstrchrnul(const char *s, int c)
+{
+ while (*s && *s != c)
+ s++;
+ return (char *)s;
+}
+#endif
+
+/*
+ * Wrappers:
+ */
+extern char *xstrdup(const char *str);
+extern void *xmalloc(size_t size);
+extern void *xmemdupz(const void *data, size_t len);
+extern char *xstrndup(const char *str, size_t len);
+extern void *xrealloc(void *ptr, size_t size);
+extern void *xcalloc(size_t nmemb, size_t size);
+extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
+extern ssize_t xread(int fd, void *buf, size_t len);
+extern ssize_t xwrite(int fd, const void *buf, size_t len);
+extern int xdup(int fd);
+extern FILE *xfdopen(int fd, const char *mode);
+extern int xmkstemp(char *template);
+
+static inline size_t xsize_t(off_t len)
+{
+ return (size_t)len;
+}
+
+static inline int has_extension(const char *filename, const char *ext)
+{
+ size_t len = strlen(filename);
+ size_t extlen = strlen(ext);
+ return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
+}
+
+/* Sane ctype - no locale, and works with signed chars */
+#undef isascii
+#undef isspace
+#undef isdigit
+#undef isalpha
+#undef isalnum
+#undef tolower
+#undef toupper
+extern unsigned char sane_ctype[256];
+#define GIT_SPACE 0x01
+#define GIT_DIGIT 0x02
+#define GIT_ALPHA 0x04
+#define GIT_GLOB_SPECIAL 0x08
+#define GIT_REGEX_SPECIAL 0x10
+#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
+#define isascii(x) (((x) & ~0x7f) == 0)
+#define isspace(x) sane_istest(x,GIT_SPACE)
+#define isdigit(x) sane_istest(x,GIT_DIGIT)
+#define isalpha(x) sane_istest(x,GIT_ALPHA)
+#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
+#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
+#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
+#define tolower(x) sane_case((unsigned char)(x), 0x20)
+#define toupper(x) sane_case((unsigned char)(x), 0)
+
+static inline int sane_case(int x, int high)
+{
+ if (sane_istest(x, GIT_ALPHA))
+ x = (x & ~0x20) | high;
+ return x;
+}
+
+static inline int strtoul_ui(char const *s, int base, unsigned int *result)
+{
+ unsigned long ul;
+ char *p;
+
+ errno = 0;
+ ul = strtoul(s, &p, base);
+ if (errno || *p || p == s || (unsigned int) ul != ul)
+ return -1;
+ *result = ul;
+ return 0;
+}
+
+static inline int strtol_i(char const *s, int base, int *result)
+{
+ long ul;
+ char *p;
+
+ errno = 0;
+ ul = strtol(s, &p, base);
+ if (errno || *p || p == s || (int) ul != ul)
+ return -1;
+ *result = ul;
+ return 0;
+}
+
+#ifdef INTERNAL_QSORT
+void git_qsort(void *base, size_t nmemb, size_t size,
+ int(*compar)(const void *, const void *));
+#define qsort git_qsort
+#endif
+
+#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
+# define FORCE_DIR_SET_GID S_ISGID
+#else
+# define FORCE_DIR_SET_GID 0
+#endif
+
+#ifdef NO_NSEC
+#undef USE_NSEC
+#define ST_CTIME_NSEC(st) 0
+#define ST_MTIME_NSEC(st) 0
+#else
+#ifdef USE_ST_TIMESPEC
+#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
+#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
+#else
+#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
+#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
+#endif
+#endif
+
+#endif
--- /dev/null
+/*
+ * Various trivial helper wrappers around standard functions
+ */
+#include "cache.h"
+
+/*
+ * There's no pack memory to release - but stay close to the Git
+ * version so wrap this away:
+ */
+static inline void release_pack_memory(size_t size, int flag)
+{
+}
+
+char *xstrdup(const char *str)
+{
+ char *ret = strdup(str);
+ if (!ret) {
+ release_pack_memory(strlen(str) + 1, -1);
+ ret = strdup(str);
+ if (!ret)
+ die("Out of memory, strdup failed");
+ }
+ return ret;
+}
+
+void *xmalloc(size_t size)
+{
+ void *ret = malloc(size);
+ if (!ret && !size)
+ ret = malloc(1);
+ if (!ret) {
+ release_pack_memory(size, -1);
+ ret = malloc(size);
+ if (!ret && !size)
+ ret = malloc(1);
+ if (!ret)
+ die("Out of memory, malloc failed");
+ }
+#ifdef XMALLOC_POISON
+ memset(ret, 0xA5, size);
+#endif
+ return ret;
+}
+
+/*
+ * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
+ * "data" to the allocated memory, zero terminates the allocated memory,
+ * and returns a pointer to the allocated memory. If the allocation fails,
+ * the program dies.
+ */
+void *xmemdupz(const void *data, size_t len)
+{
+ char *p = xmalloc(len + 1);
+ memcpy(p, data, len);
+ p[len] = '\0';
+ return p;
+}
+
+char *xstrndup(const char *str, size_t len)
+{
+ char *p = memchr(str, '\0', len);
+ return xmemdupz(str, p ? p - str : len);
+}
+
+void *xrealloc(void *ptr, size_t size)
+{
+ void *ret = realloc(ptr, size);
+ if (!ret && !size)
+ ret = realloc(ptr, 1);
+ if (!ret) {
+ release_pack_memory(size, -1);
+ ret = realloc(ptr, size);
+ if (!ret && !size)
+ ret = realloc(ptr, 1);
+ if (!ret)
+ die("Out of memory, realloc failed");
+ }
+ return ret;
+}
+
+void *xcalloc(size_t nmemb, size_t size)
+{
+ void *ret = calloc(nmemb, size);
+ if (!ret && (!nmemb || !size))
+ ret = calloc(1, 1);
+ if (!ret) {
+ release_pack_memory(nmemb * size, -1);
+ ret = calloc(nmemb, size);
+ if (!ret && (!nmemb || !size))
+ ret = calloc(1, 1);
+ if (!ret)
+ die("Out of memory, calloc failed");
+ }
+ return ret;
+}
+
+void *xmmap(void *start, size_t length,
+ int prot, int flags, int fd, off_t offset)
+{
+ void *ret = mmap(start, length, prot, flags, fd, offset);
+ if (ret == MAP_FAILED) {
+ if (!length)
+ return NULL;
+ release_pack_memory(length, fd);
+ ret = mmap(start, length, prot, flags, fd, offset);
+ if (ret == MAP_FAILED)
+ die("Out of memory? mmap failed: %s", strerror(errno));
+ }
+ return ret;
+}
+
+/*
+ * xread() is the same a read(), but it automatically restarts read()
+ * operations with a recoverable error (EAGAIN and EINTR). xread()
+ * DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
+ */
+ssize_t xread(int fd, void *buf, size_t len)
+{
+ ssize_t nr;
+ while (1) {
+ nr = read(fd, buf, len);
+ if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
+ continue;
+ return nr;
+ }
+}
+
+/*
+ * xwrite() is the same a write(), but it automatically restarts write()
+ * operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
+ * GUARANTEE that "len" bytes is written even if the operation is successful.
+ */
+ssize_t xwrite(int fd, const void *buf, size_t len)
+{
+ ssize_t nr;
+ while (1) {
+ nr = write(fd, buf, len);
+ if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
+ continue;
+ return nr;
+ }
+}
+
+ssize_t read_in_full(int fd, void *buf, size_t count)
+{
+ char *p = buf;
+ ssize_t total = 0;
+
+ while (count > 0) {
+ ssize_t loaded = xread(fd, p, count);
+ if (loaded <= 0)
+ return total ? total : loaded;
+ count -= loaded;
+ p += loaded;
+ total += loaded;
+ }
+
+ return total;
+}
+
+ssize_t write_in_full(int fd, const void *buf, size_t count)
+{
+ const char *p = buf;
+ ssize_t total = 0;
+
+ while (count > 0) {
+ ssize_t written = xwrite(fd, p, count);
+ if (written < 0)
+ return -1;
+ if (!written) {
+ errno = ENOSPC;
+ return -1;
+ }
+ count -= written;
+ p += written;
+ total += written;
+ }
+
+ return total;
+}
+
+int xdup(int fd)
+{
+ int ret = dup(fd);
+ if (ret < 0)
+ die("dup failed: %s", strerror(errno));
+ return ret;
+}
+
+FILE *xfdopen(int fd, const char *mode)
+{
+ FILE *stream = fdopen(fd, mode);
+ if (stream == NULL)
+ die("Out of memory? fdopen failed: %s", strerror(errno));
+ return stream;
+}
+
+int xmkstemp(char *template)
+{
+ int fd;
+
+ fd = mkstemp(template);
+ if (fd < 0)
+ die("Unable to create temporary file: %s", strerror(errno));
+ return fd;
+}
projects / karo-tx-linux.git / commitdiff