CONFIG_RCU_TRACE debugfs Files and Formats
-The rcutree implementation of RCU provides debugfs trace output that
-summarizes counters and state. This information is useful for debugging
-RCU itself, and can sometimes also help to debug abuses of RCU.
-The following sections describe the debugfs files and formats.
+The rcutree and rcutiny implementations of RCU provide debugfs trace
+output that summarizes counters and state. This information is useful for
+debugging RCU itself, and can sometimes also help to debug abuses of RCU.
+The following sections describe the debugfs files and formats, first
+for rcutree and next for rcutiny.
-Hierarchical RCU debugfs Files and Formats
+CONFIG_TREE_RCU and CONFIG_TREE_PREEMPT_RCU debugfs Files and Formats
-This implementation of RCU provides three debugfs files under the
+These implementations of RCU provides five debugfs files under the
top-level directory RCU: rcu/rcudata (which displays fields in struct
-rcu_data), rcu/rcugp (which displays grace-period counters), and
-rcu/rcuhier (which displays the struct rcu_node hierarchy).
+rcu_data), rcu/rcudata.csv (which is a .csv spreadsheet version of
+rcu/rcudata), rcu/rcugp (which displays grace-period counters),
+rcu/rcuhier (which displays the struct rcu_node hierarchy), and
+rcu/rcu_pending (which displays counts of the reasons that the
+rcu_pending() function decided that there was core RCU work to do).
The output of "cat rcu/rcudata" looks as follows:
been registered in absence of CPU-hotplug activity.
o "co" is the number of RCU callbacks that have been orphaned due to
- this CPU going offline.
+ this CPU going offline. These orphaned callbacks have been moved
+ to an arbitrarily chosen online CPU.
o "ca" is the number of RCU callbacks that have been adopted due to
other CPUs going offline. Note that ci+co-ca+ql is the number of
The output of "cat rcu/rcuhier" looks as follows, with very long lines:
-c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6 oqlen=0
+c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6
1/1 .>. 0:127 ^0
3/3 .>. 0:35 ^0 0/0 .>. 36:71 ^1 0/0 .>. 72:107 ^2 0/0 .>. 108:127 ^3
3/3f .>. 0:5 ^0 2/3 .>. 6:11 ^1 0/0 .>. 12:17 ^2 0/0 .>. 18:23 ^3 0/0 .>. 24:29 ^4 0/0 .>. 30:35 ^5 0/0 .>. 36:41 ^0 0/0 .>. 42:47 ^1 0/0 .>. 48:53 ^2 0/0 .>. 54:59 ^3 0/0 .>. 60:65 ^4 0/0 .>. 66:71 ^5 0/0 .>. 72:77 ^0 0/0 .>. 78:83 ^1 0/0 .>. 84:89 ^2 0/0 .>. 90:95 ^3 0/0 .>. 96:101 ^4 0/0 .>. 102:107 ^5 0/0 .>. 108:113 ^0 0/0 .>. 114:119 ^1 0/0 .>. 120:125 ^2 0/0 .>. 126:127 ^3
rcu_bh:
-c=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0 oqlen=0
+c=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0
0/1 .>. 0:127 ^0
0/3 .>. 0:35 ^0 0/0 .>. 36:71 ^1 0/0 .>. 72:107 ^2 0/0 .>. 108:127 ^3
0/3f .>. 0:5 ^0 0/3 .>. 6:11 ^1 0/0 .>. 12:17 ^2 0/0 .>. 18:23 ^3 0/0 .>. 24:29 ^4 0/0 .>. 30:35 ^5 0/0 .>. 36:41 ^0 0/0 .>. 42:47 ^1 0/0 .>. 48:53 ^2 0/0 .>. 54:59 ^3 0/0 .>. 60:65 ^4 0/0 .>. 66:71 ^5 0/0 .>. 72:77 ^0 0/0 .>. 78:83 ^1 0/0 .>. 84:89 ^2 0/0 .>. 90:95 ^3 0/0 .>. 96:101 ^4 0/0 .>. 102:107 ^5 0/0 .>. 108:113 ^0 0/0 .>. 114:119 ^1 0/0 .>. 120:125 ^2 0/0 .>. 126:127 ^3
exited immediately (without even being counted in nfqs above)
due to contention on ->fqslock.
-o "oqlen" is the number of callbacks on the "orphan" callback
- list. RCU callbacks are placed on this list by CPUs going
- offline, and are "adopted" either by the CPU helping the outgoing
- CPU or by the next rcu_barrier*() call, whichever comes first.
-
o Each element of the form "1/1 0:127 ^0" represents one struct
rcu_node. Each line represents one level of the hierarchy, from
root to leaves. It is best to think of the rcu_data structures
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().
+
+
+CONFIG_TINY_RCU and CONFIG_TINY_PREEMPT_RCU debugfs Files and Formats
+
+These implementations of RCU provides a single debugfs file under the
+top-level directory RCU, namely rcu/rcudata, which displays fields in
+rcu_bh_ctrlblk, rcu_sched_ctrlblk and, for CONFIG_TINY_PREEMPT_RCU,
+rcu_preempt_ctrlblk.
+
+The output of "cat rcu/rcudata" is as follows:
+
+rcu_preempt: qlen=24 gp=1097669 g197/p197/c197 tasks=...
+ ttb=. btg=no ntb=184 neb=0 nnb=183 j=01f7 bt=0274
+ normal balk: nt=1097669 gt=0 bt=371 b=0 ny=25073378 nos=0
+ exp balk: bt=0 nos=0
+rcu_sched: qlen: 0
+rcu_bh: qlen: 0
+
+This is split into rcu_preempt, rcu_sched, and rcu_bh sections, with the
+rcu_preempt section appearing only in CONFIG_TINY_PREEMPT_RCU builds.
+The last three lines of the rcu_preempt section appear only in
+CONFIG_RCU_BOOST kernel builds. The fields are as follows:
+
+o "qlen" is the number of RCU callbacks currently waiting either
+ for an RCU grace period or waiting to be invoked. This is the
+ only field present for rcu_sched and rcu_bh, due to the
+ short-circuiting of grace period in those two cases.
+
+o "gp" is the number of grace periods that have completed.
+
+o "g197/p197/c197" displays the grace-period state, with the
+ "g" number being the number of grace periods that have started
+ (mod 256), the "p" number being the number of grace periods
+ that the CPU has responded to (also mod 256), and the "c"
+ number being the number of grace periods that have completed
+ (once again mode 256).
+
+ Why have both "gp" and "g"? Because the data flowing into
+ "gp" is only present in a CONFIG_RCU_TRACE kernel.
+
+o "tasks" is a set of bits. The first bit is "T" if there are
+ currently tasks that have recently blocked within an RCU
+ read-side critical section, the second bit is "N" if any of the
+ aforementioned tasks are blocking the current RCU grace period,
+ and the third bit is "E" if any of the aforementioned tasks are
+ blocking the current expedited grace period. Each bit is "."
+ if the corresponding condition does not hold.
+
+o "ttb" is a single bit. It is "B" if any of the blocked tasks
+ need to be priority boosted and "." otherwise.
+
+o "btg" indicates whether boosting has been carried out during
+ the current grace period, with "exp" indicating that boosting
+ is in progress for an expedited grace period, "no" indicating
+ that boosting has not yet started for a normal grace period,
+ "begun" indicating that boosting has bebug for a normal grace
+ period, and "done" indicating that boosting has completed for
+ a normal grace period.
+
+o "ntb" is the total number of tasks subjected to RCU priority boosting
+ periods since boot.
+
+o "neb" is the number of expedited grace periods that have had
+ to resort to RCU priority boosting since boot.
+
+o "nnb" is the number of normal grace periods that have had
+ to resort to RCU priority boosting since boot.
+
+o "j" is the low-order 12 bits of the jiffies counter in hexadecimal.
+
+o "bt" is the low-order 12 bits of the value that the jiffies counter
+ will have at the next time that boosting is scheduled to begin.
+
+o In the line beginning with "normal balk", the fields are as follows:
+
+ o "nt" is the number of times that the system balked from
+ boosting because there were no blocked tasks to boost.
+ Note that the system will balk from boosting even if the
+ grace period is overdue when the currently running task
+ is looping within an RCU read-side critical section.
+ There is no point in boosting in this case, because
+ boosting a running task won't make it run any faster.
+
+ o "gt" is the number of times that the system balked
+ from boosting because, although there were blocked tasks,
+ none of them were preventing the current grace period
+ from completing.
+
+ o "bt" is the number of times that the system balked
+ from boosting because boosting was already in progress.
+
+ o "b" is the number of times that the system balked from
+ boosting because boosting had already completed for
+ the grace period in question.
+
+ o "ny" is the number of times that the system balked from
+ boosting because it was not yet time to start boosting
+ the grace period in question.
+
+ o "nos" is the number of times that the system balked from
+ boosting for inexplicable ("not otherwise specified")
+ reasons. This can actually happen due to races involving
+ increments of the jiffies counter.
+
+o In the line beginning with "exp balk", the fields are as follows:
+
+ o "bt" is the number of times that the system balked from
+ boosting because there were no blocked tasks to boost.
+
+ o "nos" is the number of times that the system balked from
+ boosting for inexplicable ("not otherwise specified")
+ reasons.
aic7*seq.h*
aicasm
aicdb.h*
+altivec1.c
+altivec2.c
+altivec4.c
+altivec8.c
asm-offsets.h
asm_offsets.h
autoconf.h*
build
bvmlinux
bzImage*
+capflags.c
classlist.h*
comp*.log
compile.h*
docproc
elf2ecoff
elfconfig.h*
+evergreen_reg_safe.h
fixdep
flask.h
fore200e_mkfirm
*_gray256.c
ihex2fw
ikconfig.h*
+inat-tables.c
initramfs_data.cpio
initramfs_data.cpio.gz
initramfs_list
+int16.c
+int1.c
+int2.c
+int32.c
+int4.c
+int8.c
kallsyms
kconfig
keywords.c
mktables
mktree
modpost
+modules.builtin
modules.order
modversions.h*
ncscope.*
pca200e_ecd.bin2
piggy.gz
piggyback
+piggy.S
pnmtologo
ppc_defs.h*
pss_boot.h
qconf
+r100_reg_safe.h
+r200_reg_safe.h
+r300_reg_safe.h
+r420_reg_safe.h
+r600_reg_safe.h
raid6altivec*.c
raid6int*.c
raid6tables.c
relocs
+rn50_reg_safe.h
+rs600_reg_safe.h
+rv515_reg_safe.h
series
setup
setup.bin
sm_tbl*
split-include
syscalltab.h
+tables.c
tags
tftpboot.img
timeconst.h
vmlinux-*
vmlinux.aout
vmlinux.lds
+voffset.h
vsyscall.lds
vsyscall_32.lds
wanxlfw.inc
wakeup.lds
zImage*
zconf.hash.c
+zoffset.h
Notes: Further information in
http://www.oreilly.com/catalog/linuxdrive2/
- * Title: "Linux Device Drivers, 3nd Edition"
+ * Title: "Linux Device Drivers, 3rd Edition"
Authors: Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman
Publisher: O'Reilly & Associates.
Date: 2005.
Pages: 600.
ISBN: 0-13-101908-2
- * Title: "The Design and Implementation of the 4.4 BSD UNIX
- Operating System"
- Author: Marshall Kirk McKusick, Keith Bostic, Michael J. Karels,
- John S. Quarterman.
- Publisher: Addison-Wesley.
- Date: 1996.
- ISBN: 0-201-54979-4
-
* Title: "Programming for the real world - POSIX.4"
Author: Bill O. Gallmeister.
Publisher: O'Reilly & Associates, Inc..
POSIX. Good reference.
* Title: "UNIX Systems for Modern Architectures: Symmetric
- Multiprocesssing and Caching for Kernel Programmers"
+ Multiprocessing and Caching for Kernel Programmers"
Author: Curt Schimmel.
Publisher: Addison Wesley.
Date: June, 1994.
Pages: 432.
ISBN: 0-201-63338-8
- * Title: "The Design and Implementation of the 4.3 BSD UNIX
- Operating System"
- Author: Samuel J. Leffler, Marshall Kirk McKusick, Michael J.
- Karels, John S. Quarterman.
- Publisher: Addison-Wesley.
- Date: 1989 (reprinted with corrections on October, 1990).
- ISBN: 0-201-06196-1
-
- * Title: "The Design of the UNIX Operating System"
- Author: Maurice J. Bach.
- Publisher: Prentice Hall.
- Date: 1986.
- Pages: 471.
- ISBN: 0-13-201757-1
-
MISCELLANEOUS:
* Name: linux/Documentation
noapic [SMP,APIC] Tells the kernel to not make use of any
IOAPICs that may be present in the system.
+ noautogroup Disable scheduler automatic task group creation.
+
nobats [PPC] Do not use BATs for mapping kernel lowmem
on "Classic" PPC cores.
to facilitate early boot debugging.
See also Documentation/trace/events.txt
- tsc= Disable clocksource-must-verify flag for TSC.
+ tsc= Disable clocksource stability checks for TSC.
Format: <string>
[x86] reliable: mark tsc clocksource as reliable, this
- disables clocksource verification at runtime.
- Used to enable high-resolution timer mode on older
- hardware, and in virtualized environment.
+ disables clocksource verification at runtime, as well
+ as the stability checks done at bootup. Used to enable
+ high-resolution timer mode on older hardware, and in
+ virtualized environment.
[x86] noirqtime: Do not use TSC to do irq accounting.
Used to run time disable IRQ_TIME_ACCOUNTING on any
platforms where RDTSC is slow and this accounting
0x00000001 lguest
0x00000002 Xen
0x00000003 Moorestown MID
+ 0x00000004 CE4100 TV Platform
Field name: hardware_subarch_data
Type: write (subarch-dependent)
S: Maintained
F: Documentation/timers/
F: kernel/hrtimer.c
+F: kernel/time/clockevents.c
+F: kernel/time/tick*.*
+F: kernel/time/timer_*.c
+F include/linux/clockevents.h
F: include/linux/hrtimer.h
HIGH-SPEED SCC DRIVER FOR AX.25
S: Supported
F: sound/soc/s3c24xx
+TIMEKEEPING, NTP
+M: John Stultz <johnstul@us.ibm.com>
+M: Thomas Gleixner <tglx@linutronix.de>
+S: Supported
+F: include/linux/clocksource.h
+F: include/linux/time.h
+F: include/linux/timex.h
+F: include/linux/timekeeping.h
+F: kernel/time/clocksource.c
+F: kernel/time/time*.c
+F: kernel/time/ntp.c
+
TLG2300 VIDEO4LINUX-2 DRIVER
M: Huang Shijie <shijie8@gmail.com>
M: Kang Yong <kangyong@telegent.com>
config HAVE_ARCH_JUMP_LABEL
bool
+config HAVE_ARCH_MUTEX_CPU_RELAX
+ bool
+
source "kernel/gcov/Kconfig"
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_LZO
select HAVE_GET_USER_PAGES_FAST
+ select HAVE_ARCH_MUTEX_CPU_RELAX
select ARCH_INLINE_SPIN_TRYLOCK
select ARCH_INLINE_SPIN_TRYLOCK_BH
select ARCH_INLINE_SPIN_LOCK
*/
#include <asm-generic/mutex-dec.h>
+
+#define arch_mutex_cpu_relax() barrier()
If unsure, choose "PC-compatible" instead.
+config X86_INTEL_CE
+ bool "CE4100 TV platform"
+ depends on PCI
+ depends on PCI_GODIRECT
+ depends on X86_32
+ depends on X86_EXTENDED_PLATFORM
+ select X86_REBOOTFIXUPS
+ ---help---
+ Select for the Intel CE media processor (CE4100) SOC.
+ This option compiles in support for the CE4100 SOC for settop
+ boxes and media devices.
+
config X86_MRST
bool "Moorestown MID platform"
depends on PCI
depends on X86_EXTENDED_PLATFORM
depends on X86_IO_APIC
select APB_TIMER
+ select I2C
+ select SPI
+ select INTEL_SCU_IPC
+ select X86_PLATFORM_DEVICES
---help---
Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
Internet Device(MID) platform. Moorestown consists of two chips:
Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
supposed to run on an IA32-based Unisys ES7000 system.
+config X86_32_IRIS
+ tristate "Eurobraille/Iris poweroff module"
+ depends on X86_32
+ ---help---
+ The Iris machines from EuroBraille do not have APM or ACPI support
+ to shut themselves down properly. A special I/O sequence is
+ needed to do so, which is what this module does at
+ kernel shutdown.
+
+ This is only for Iris machines from EuroBraille.
+
+ If unused, say N.
+
config SCHED_OMIT_FRAME_POINTER
def_bool y
prompt "Single-depth WCHAN output"
comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
-config K8_NUMA
+config AMD_NUMA
def_bool y
prompt "Old style AMD Opteron NUMA detection"
depends on X86_64 && NUMA && PCI
---help---
- Enable K8 NUMA node topology detection. You should say Y here if
- you have a multi processor AMD K8 system. This uses an old
- method to read the NUMA configuration directly from the builtin
- Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
- instead, which also takes priority if both are compiled in.
+ Enable AMD NUMA node topology detection. You should say Y here if
+ you have a multi processor AMD system. This uses an old method to
+ read the NUMA configuration directly from the builtin Northbridge
+ of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
+ which also takes priority if both are compiled in.
config X86_64_ACPI_NUMA
def_bool y
feature as well as for the change_page_attr() infrastructure.
If in doubt, say "N"
+config DEBUG_SET_MODULE_RONX
+ bool "Set loadable kernel module data as NX and text as RO"
+ depends on MODULES
+ ---help---
+ This option helps catch unintended modifications to loadable
+ kernel module's text and read-only data. It also prevents execution
+ of module data. Such protection may interfere with run-time code
+ patching and dynamic kernel tracing - and they might also protect
+ against certain classes of kernel exploits.
+ If in doubt, say "N".
+
config DEBUG_NX_TEST
tristate "Testcase for the NX non-executable stack feature"
depends on DEBUG_KERNEL && m
hlt
jmp 1b
-#include "../../kernel/verify_cpu_64.S"
+#include "../../kernel/verify_cpu.S"
/*
* Be careful here startup_64 needs to be at a predictable
extern void alternatives_smp_module_del(struct module *mod);
extern void alternatives_smp_switch(int smp);
extern int alternatives_text_reserved(void *start, void *end);
+extern bool skip_smp_alternatives;
#else
static inline void alternatives_smp_module_add(struct module *mod, char *name,
void *locks, void *locks_end,
#include <linux/pci.h>
-extern struct pci_device_id k8_nb_ids[];
+extern struct pci_device_id amd_nb_misc_ids[];
struct bootnode;
-extern int early_is_k8_nb(u32 value);
-extern int cache_k8_northbridges(void);
-extern void k8_flush_garts(void);
-extern int k8_get_nodes(struct bootnode *nodes);
-extern int k8_numa_init(unsigned long start_pfn, unsigned long end_pfn);
-extern int k8_scan_nodes(void);
+extern int early_is_amd_nb(u32 value);
+extern int amd_cache_northbridges(void);
+extern void amd_flush_garts(void);
+extern int amd_get_nodes(struct bootnode *nodes);
+extern int amd_numa_init(unsigned long start_pfn, unsigned long end_pfn);
+extern int amd_scan_nodes(void);
-struct k8_northbridge_info {
+struct amd_northbridge {
+ struct pci_dev *misc;
+};
+
+struct amd_northbridge_info {
u16 num;
- u8 gart_supported;
- struct pci_dev **nb_misc;
+ u64 flags;
+ struct amd_northbridge *nb;
};
-extern struct k8_northbridge_info k8_northbridges;
+extern struct amd_northbridge_info amd_northbridges;
+
+#define AMD_NB_GART 0x1
+#define AMD_NB_L3_INDEX_DISABLE 0x2
#ifdef CONFIG_AMD_NB
-static inline struct pci_dev *node_to_k8_nb_misc(int node)
+static inline int amd_nb_num(void)
{
- return (node < k8_northbridges.num) ? k8_northbridges.nb_misc[node] : NULL;
+ return amd_northbridges.num;
}
-#else
+static inline int amd_nb_has_feature(int feature)
+{
+ return ((amd_northbridges.flags & feature) == feature);
+}
-static inline struct pci_dev *node_to_k8_nb_misc(int node)
+static inline struct amd_northbridge *node_to_amd_nb(int node)
{
- return NULL;
+ return (node < amd_northbridges.num) ? &amd_northbridges.nb[node] : NULL;
}
+
+#else
+
+#define amd_nb_num(x) 0
+#define amd_nb_has_feature(x) false
+#define node_to_amd_nb(x) NULL
+
#endif
extern void setup_secondary_APIC_clock(void);
extern int APIC_init_uniprocessor(void);
extern void enable_NMI_through_LVT0(void);
+extern int apic_force_enable(void);
/*
* On 32bit this is mach-xxx local
#ifdef CONFIG_X86_32
# define MAX_IO_APICS 64
+# define MAX_LOCAL_APIC 256
#else
# define MAX_IO_APICS 128
# define MAX_LOCAL_APIC 32768
X86_SUBARCH_LGUEST,
X86_SUBARCH_XEN,
X86_SUBARCH_MRST,
+ X86_SUBARCH_CE4100,
X86_NR_SUBARCHS,
};
FIX_TEXT_POKE1, /* reserve 2 pages for text_poke() */
FIX_TEXT_POKE0, /* first page is last, because allocation is backward */
__end_of_permanent_fixed_addresses,
+
+#ifdef CONFIG_X86_MRST
+ FIX_LNW_VRTC,
+#endif
/*
* 256 temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
int err;
/* See comment in fxsave() below. */
+#ifdef CONFIG_AS_FXSAVEQ
+ asm volatile("1: fxrstorq %[fx]\n\t"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ "3: movl $-1,%[err]\n"
+ " jmp 2b\n"
+ ".previous\n"
+ _ASM_EXTABLE(1b, 3b)
+ : [err] "=r" (err)
+ : [fx] "m" (*fx), "0" (0));
+#else
asm volatile("1: rex64/fxrstor (%[fx])\n\t"
"2:\n"
".section .fixup,\"ax\"\n"
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err)
: [fx] "R" (fx), "m" (*fx), "0" (0));
+#endif
return err;
}
return -EFAULT;
/* See comment in fxsave() below. */
+#ifdef CONFIG_AS_FXSAVEQ
+ asm volatile("1: fxsaveq %[fx]\n\t"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ "3: movl $-1,%[err]\n"
+ " jmp 2b\n"
+ ".previous\n"
+ _ASM_EXTABLE(1b, 3b)
+ : [err] "=r" (err), [fx] "=m" (*fx)
+ : "0" (0));
+#else
asm volatile("1: rex64/fxsave (%[fx])\n\t"
"2:\n"
".section .fixup,\"ax\"\n"
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err), "=m" (*fx)
: [fx] "R" (fx), "0" (0));
+#endif
if (unlikely(err) &&
__clear_user(fx, sizeof(struct i387_fxsave_struct)))
err = -EFAULT;
extern int io_apic_set_pci_routing(struct device *dev, int irq,
struct io_apic_irq_attr *irq_attr);
void setup_IO_APIC_irq_extra(u32 gsi);
-extern void ioapic_init_mappings(void);
+extern void ioapic_and_gsi_init(void);
extern void ioapic_insert_resources(void);
extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
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 probe_nr_irqs_gsi(void);
extern int get_nr_irqs_gsi(void);
-
extern void setup_ioapic_ids_from_mpc(void);
+extern void setup_ioapic_ids_from_mpc_nocheck(void);
struct mp_ioapic_gsi{
u32 gsi_base;
#define io_apic_assign_pci_irqs 0
#define setup_ioapic_ids_from_mpc x86_init_noop
static const int timer_through_8259 = 0;
-static inline void ioapic_init_mappings(void) { }
+static inline void ioapic_and_gsi_init(void) { }
static inline void ioapic_insert_resources(void) { }
-static inline void probe_nr_irqs_gsi(void) { }
#define gsi_top (NR_IRQS_LEGACY)
static inline int mp_find_ioapic(u32 gsi) { return 0; }
void mce_log_therm_throt_event(__u64 status);
+/* Interrupt Handler for core thermal thresholds */
+extern int (*platform_thermal_notify)(__u64 msr_val);
+
#ifdef CONFIG_X86_THERMAL_VECTOR
extern void mcheck_intel_therm_init(void);
#else
#ifdef CONFIG_MICROCODE_AMD
extern struct microcode_ops * __init init_amd_microcode(void);
+
+static inline void get_ucode_data(void *to, const u8 *from, size_t n)
+{
+ memcpy(to, from, n);
+}
+
#else
static inline struct microcode_ops * __init init_amd_microcode(void)
{
#include <asm/mpspec_def.h>
#include <asm/x86_init.h>
+#include <asm/apicdef.h>
-extern int apic_version[MAX_APICS];
+extern int apic_version[];
extern int pic_mode;
#ifdef CONFIG_X86_32
int active_high_low);
#endif /* CONFIG_ACPI */
-#define PHYSID_ARRAY_SIZE BITS_TO_LONGS(MAX_APICS)
+#define PHYSID_ARRAY_SIZE BITS_TO_LONGS(MAX_LOCAL_APIC)
struct physid_mask {
unsigned long mask[PHYSID_ARRAY_SIZE];
test_and_set_bit(physid, (map).mask)
#define physids_and(dst, src1, src2) \
- bitmap_and((dst).mask, (src1).mask, (src2).mask, MAX_APICS)
+ bitmap_and((dst).mask, (src1).mask, (src2).mask, MAX_LOCAL_APIC)
#define physids_or(dst, src1, src2) \
- bitmap_or((dst).mask, (src1).mask, (src2).mask, MAX_APICS)
+ bitmap_or((dst).mask, (src1).mask, (src2).mask, MAX_LOCAL_APIC)
#define physids_clear(map) \
- bitmap_zero((map).mask, MAX_APICS)
+ bitmap_zero((map).mask, MAX_LOCAL_APIC)
#define physids_complement(dst, src) \
- bitmap_complement((dst).mask, (src).mask, MAX_APICS)
+ bitmap_complement((dst).mask, (src).mask, MAX_LOCAL_APIC)
#define physids_empty(map) \
- bitmap_empty((map).mask, MAX_APICS)
+ bitmap_empty((map).mask, MAX_LOCAL_APIC)
#define physids_equal(map1, map2) \
- bitmap_equal((map1).mask, (map2).mask, MAX_APICS)
+ bitmap_equal((map1).mask, (map2).mask, MAX_LOCAL_APIC)
#define physids_weight(map) \
- bitmap_weight((map).mask, MAX_APICS)
+ bitmap_weight((map).mask, MAX_LOCAL_APIC)
#define physids_shift_right(d, s, n) \
- bitmap_shift_right((d).mask, (s).mask, n, MAX_APICS)
+ bitmap_shift_right((d).mask, (s).mask, n, MAX_LOCAL_APIC)
#define physids_shift_left(d, s, n) \
- bitmap_shift_left((d).mask, (s).mask, n, MAX_APICS)
+ bitmap_shift_left((d).mask, (s).mask, n, MAX_LOCAL_APIC)
static inline unsigned long physids_coerce(physid_mask_t *map)
{
map->mask[0] = physids;
}
-/* Note: will create very large stack frames if physid_mask_t is big */
-#define physid_mask_of_physid(physid) \
- ({ \
- physid_mask_t __physid_mask = PHYSID_MASK_NONE; \
- physid_set(physid, __physid_mask); \
- __physid_mask; \
- })
-
static inline void physid_set_mask_of_physid(int physid, physid_mask_t *map)
{
physids_clear(*map);
#ifdef CONFIG_X86_32
# define MAX_MPC_ENTRY 1024
-# define MAX_APICS 256
-#else
-# if NR_CPUS <= 255
-# define MAX_APICS 255
-# else
-# define MAX_APICS 32768
-# endif
#endif
/* Intel MP Floating Pointer Structure */
--- /dev/null
+#ifndef _MRST_VRTC_H
+#define _MRST_VRTC_H
+
+extern unsigned char vrtc_cmos_read(unsigned char reg);
+extern void vrtc_cmos_write(unsigned char val, unsigned char reg);
+extern unsigned long vrtc_get_time(void);
+extern int vrtc_set_mmss(unsigned long nowtime);
+
+#endif
#include <linux/sfi.h>
extern int pci_mrst_init(void);
-int __init sfi_parse_mrtc(struct sfi_table_header *table);
+extern int __init sfi_parse_mrtc(struct sfi_table_header *table);
+extern int sfi_mrtc_num;
+extern struct sfi_rtc_table_entry sfi_mrtc_array[];
/*
* Medfield is the follow-up of Moorestown, it combines two chip solution into
extern struct console early_hsu_console;
extern void hsu_early_console_init(void);
+
+extern void intel_scu_devices_create(void);
+extern void intel_scu_devices_destroy(void);
+
+/* VRTC timer */
+#define MRST_VRTC_MAP_SZ (1024)
+/*#define MRST_VRTC_PGOFFSET (0xc00) */
+
+extern void mrst_rtc_init(void);
+
#endif /* _ASM_X86_MRST_H */
#define PACKAGE_THERM_INT_LOW_ENABLE (1 << 1)
#define PACKAGE_THERM_INT_PLN_ENABLE (1 << 24)
+/* Thermal Thresholds Support */
+#define THERM_INT_THRESHOLD0_ENABLE (1 << 15)
+#define THERM_SHIFT_THRESHOLD0 8
+#define THERM_MASK_THRESHOLD0 (0x7f << THERM_SHIFT_THRESHOLD0)
+#define THERM_INT_THRESHOLD1_ENABLE (1 << 23)
+#define THERM_SHIFT_THRESHOLD1 16
+#define THERM_MASK_THRESHOLD1 (0x7f << THERM_SHIFT_THRESHOLD1)
+#define THERM_STATUS_THRESHOLD0 (1 << 6)
+#define THERM_LOG_THRESHOLD0 (1 << 7)
+#define THERM_STATUS_THRESHOLD1 (1 << 8)
+#define THERM_LOG_THRESHOLD1 (1 << 9)
+
/* MISC_ENABLE bits: architectural */
#define MSR_IA32_MISC_ENABLE_FAST_STRING (1ULL << 0)
#define MSR_IA32_MISC_ENABLE_TCC (1ULL << 1)
static inline void halt(void)
{
- PVOP_VCALL0(pv_irq_ops.safe_halt);
+ PVOP_VCALL0(pv_irq_ops.halt);
}
static inline void wbinvd(void)
#define PCIBIOS_MIN_CARDBUS_IO 0x4000
+extern int pcibios_enabled;
void pcibios_config_init(void);
struct pci_bus *pcibios_scan_root(int bus);
static inline void x86_mrst_early_setup(void) { }
#endif
+#ifdef CONFIG_X86_INTEL_CE
+extern void x86_ce4100_early_setup(void);
+#else
+static inline void x86_ce4100_early_setup(void) { }
+#endif
+
#ifndef _SETUP
/*
* BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
* set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
*
- * We will use 31 sets, one for sending BAU messages from each of the 32
+ * We will use one set for sending BAU messages from each of the
* cpu's on the uvhub.
*
* TLB shootdown will use the first of the 8 descriptors of each set.
* Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
*/
+#define MAX_CPUS_PER_UVHUB 64
+#define MAX_CPUS_PER_SOCKET 32
+#define UV_ADP_SIZE 64 /* hardware-provided max. */
+#define UV_CPUS_PER_ACT_STATUS 32 /* hardware-provided max. */
#define UV_ITEMS_PER_DESCRIPTOR 8
/* the 'throttle' to prevent the hardware stay-busy bug */
#define MAX_BAU_CONCURRENT 3
-#define UV_CPUS_PER_ACT_STATUS 32
#define UV_ACT_STATUS_MASK 0x3
#define UV_ACT_STATUS_SIZE 2
-#define UV_ADP_SIZE 32
#define UV_DISTRIBUTION_SIZE 256
#define UV_SW_ACK_NPENDING 8
#define UV_NET_ENDPOINT_INTD 0x38
* number of destination side software ack resources
*/
#define DEST_NUM_RESOURCES 8
-#define MAX_CPUS_PER_NODE 32
/*
* completion statuses for sending a TLB flush message
*/
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_VM86) += vm86_32.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
-obj-$(CONFIG_EARLY_PRINTK_MRST) += early_printk_mrst.o
obj-$(CONFIG_HPET_TIMER) += hpet.o
obj-$(CONFIG_APB_TIMER) += apb_timer.o
{
unsigned int ver = 0;
+ if (id >= (MAX_LOCAL_APIC-1)) {
+ printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
+ return;
+ }
+
if (!enabled) {
++disabled_cpus;
return;
acpi_register_lapic_address(acpi_lapic_addr);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
- acpi_parse_sapic, MAX_APICS);
+ acpi_parse_sapic, MAX_LOCAL_APIC);
if (!count) {
x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
- acpi_parse_x2apic, MAX_APICS);
+ acpi_parse_x2apic, MAX_LOCAL_APIC);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
- acpi_parse_lapic, MAX_APICS);
+ acpi_parse_lapic, MAX_LOCAL_APIC);
}
if (!count && !x2count) {
printk(KERN_ERR PREFIX "No LAPIC entries present\n");
mutex_unlock(&smp_alt);
}
+bool skip_smp_alternatives;
void alternatives_smp_switch(int smp)
{
struct smp_alt_module *mod;
printk("lockdep: fixing up alternatives.\n");
#endif
- if (noreplace_smp || smp_alt_once)
+ if (noreplace_smp || smp_alt_once || skip_smp_alternatives)
return;
BUG_ON(!smp && (num_online_cpus() > 1));
static u32 *flush_words;
-struct pci_device_id k8_nb_ids[] = {
+struct pci_device_id amd_nb_misc_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_MISC) },
{}
};
-EXPORT_SYMBOL(k8_nb_ids);
+EXPORT_SYMBOL(amd_nb_misc_ids);
-struct k8_northbridge_info k8_northbridges;
-EXPORT_SYMBOL(k8_northbridges);
+struct amd_northbridge_info amd_northbridges;
+EXPORT_SYMBOL(amd_northbridges);
-static struct pci_dev *next_k8_northbridge(struct pci_dev *dev)
+static struct pci_dev *next_northbridge(struct pci_dev *dev,
+ struct pci_device_id *ids)
{
do {
dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
if (!dev)
break;
- } while (!pci_match_id(&k8_nb_ids[0], dev));
+ } while (!pci_match_id(ids, dev));
return dev;
}
-int cache_k8_northbridges(void)
+int amd_cache_northbridges(void)
{
- int i;
- struct pci_dev *dev;
+ int i = 0;
+ struct amd_northbridge *nb;
+ struct pci_dev *misc;
- if (k8_northbridges.num)
+ if (amd_nb_num())
return 0;
- dev = NULL;
- while ((dev = next_k8_northbridge(dev)) != NULL)
- k8_northbridges.num++;
+ misc = NULL;
+ while ((misc = next_northbridge(misc, amd_nb_misc_ids)) != NULL)
+ i++;
- /* some CPU families (e.g. family 0x11) do not support GART */
- if (boot_cpu_data.x86 == 0xf || boot_cpu_data.x86 == 0x10 ||
- boot_cpu_data.x86 == 0x15)
- k8_northbridges.gart_supported = 1;
+ if (i == 0)
+ return 0;
- k8_northbridges.nb_misc = kmalloc((k8_northbridges.num + 1) *
- sizeof(void *), GFP_KERNEL);
- if (!k8_northbridges.nb_misc)
+ nb = kzalloc(i * sizeof(struct amd_northbridge), GFP_KERNEL);
+ if (!nb)
return -ENOMEM;
- if (!k8_northbridges.num) {
- k8_northbridges.nb_misc[0] = NULL;
- return 0;
- }
+ amd_northbridges.nb = nb;
+ amd_northbridges.num = i;
- if (k8_northbridges.gart_supported) {
- flush_words = kmalloc(k8_northbridges.num * sizeof(u32),
- GFP_KERNEL);
- if (!flush_words) {
- kfree(k8_northbridges.nb_misc);
- return -ENOMEM;
- }
- }
+ misc = NULL;
+ for (i = 0; i != amd_nb_num(); i++) {
+ node_to_amd_nb(i)->misc = misc =
+ next_northbridge(misc, amd_nb_misc_ids);
+ }
+
+ /* some CPU families (e.g. family 0x11) do not support GART */
+ if (boot_cpu_data.x86 == 0xf || boot_cpu_data.x86 == 0x10 ||
+ boot_cpu_data.x86 == 0x15)
+ amd_northbridges.flags |= AMD_NB_GART;
+
+ /*
+ * Some CPU families support L3 Cache Index Disable. There are some
+ * limitations because of E382 and E388 on family 0x10.
+ */
+ if (boot_cpu_data.x86 == 0x10 &&
+ boot_cpu_data.x86_model >= 0x8 &&
+ (boot_cpu_data.x86_model > 0x9 ||
+ boot_cpu_data.x86_mask >= 0x1))
+ amd_northbridges.flags |= AMD_NB_L3_INDEX_DISABLE;
- dev = NULL;
- i = 0;
- while ((dev = next_k8_northbridge(dev)) != NULL) {
- k8_northbridges.nb_misc[i] = dev;
- if (k8_northbridges.gart_supported)
- pci_read_config_dword(dev, 0x9c, &flush_words[i++]);
- }
- k8_northbridges.nb_misc[i] = NULL;
return 0;
}
-EXPORT_SYMBOL_GPL(cache_k8_northbridges);
+EXPORT_SYMBOL_GPL(amd_cache_northbridges);
/* Ignores subdevice/subvendor but as far as I can figure out
they're useless anyways */
-int __init early_is_k8_nb(u32 device)
+int __init early_is_amd_nb(u32 device)
{
struct pci_device_id *id;
u32 vendor = device & 0xffff;
device >>= 16;
- for (id = k8_nb_ids; id->vendor; id++)
+ for (id = amd_nb_misc_ids; id->vendor; id++)
if (vendor == id->vendor && device == id->device)
return 1;
return 0;
}
-void k8_flush_garts(void)
+int amd_cache_gart(void)
+{
+ int i;
+
+ if (!amd_nb_has_feature(AMD_NB_GART))
+ return 0;
+
+ flush_words = kmalloc(amd_nb_num() * sizeof(u32), GFP_KERNEL);
+ if (!flush_words) {
+ amd_northbridges.flags &= ~AMD_NB_GART;
+ return -ENOMEM;
+ }
+
+ for (i = 0; i != amd_nb_num(); i++)
+ pci_read_config_dword(node_to_amd_nb(i)->misc, 0x9c,
+ &flush_words[i]);
+
+ return 0;
+}
+
+void amd_flush_garts(void)
{
int flushed, i;
unsigned long flags;
static DEFINE_SPINLOCK(gart_lock);
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return;
/* Avoid races between AGP and IOMMU. In theory it's not needed
that it doesn't matter to serialize more. -AK */
spin_lock_irqsave(&gart_lock, flags);
flushed = 0;
- for (i = 0; i < k8_northbridges.num; i++) {
- pci_write_config_dword(k8_northbridges.nb_misc[i], 0x9c,
- flush_words[i]|1);
+ for (i = 0; i < amd_nb_num(); i++) {
+ pci_write_config_dword(node_to_amd_nb(i)->misc, 0x9c,
+ flush_words[i] | 1);
flushed++;
}
- for (i = 0; i < k8_northbridges.num; i++) {
+ for (i = 0; i < amd_nb_num(); i++) {
u32 w;
/* Make sure the hardware actually executed the flush*/
for (;;) {
- pci_read_config_dword(k8_northbridges.nb_misc[i],
+ pci_read_config_dword(node_to_amd_nb(i)->misc,
0x9c, &w);
if (!(w & 1))
break;
if (!flushed)
printk("nothing to flush?\n");
}
-EXPORT_SYMBOL_GPL(k8_flush_garts);
+EXPORT_SYMBOL_GPL(amd_flush_garts);
-static __init int init_k8_nbs(void)
+static __init int init_amd_nbs(void)
{
int err = 0;
- err = cache_k8_northbridges();
+ err = amd_cache_northbridges();
if (err < 0)
- printk(KERN_NOTICE "K8 NB: Cannot enumerate AMD northbridges.\n");
+ printk(KERN_NOTICE "AMD NB: Cannot enumerate AMD northbridges.\n");
+
+ if (amd_cache_gart() < 0)
+ printk(KERN_NOTICE "AMD NB: Cannot initialize GART flush words, "
+ "GART support disabled.\n");
return err;
}
/* This has to go after the PCI subsystem */
-fs_initcall(init_k8_nbs);
+fs_initcall(init_amd_nbs);
if (system_state == SYSTEM_BOOTING) {
irq_modify_status(adev->irq, 0, IRQ_MOVE_PCNTXT);
+ irq_set_affinity(adev->irq, cpumask_of(adev->cpu));
/* APB timer irqs are set up as mp_irqs, timer is edge type */
__set_irq_handler(adev->irq, handle_edge_irq, 0, "edge");
if (request_irq(adev->irq, apbt_interrupt_handler,
* Do an PCI bus scan by hand because we're running before the PCI
* subsystem.
*
- * All K8 AGP bridges are AGPv3 compliant, so we can do this scan
+ * All AMD AGP bridges are AGPv3 compliant, so we can do this scan
* generically. It's probably overkill to always scan all slots because
* the AGP bridges should be always an own bus on the HT hierarchy,
* but do it here for future safety.
dev_limit = bus_dev_ranges[i].dev_limit;
for (slot = dev_base; slot < dev_limit; slot++) {
- if (!early_is_k8_nb(read_pci_config(bus, slot, 3, 0x00)))
+ if (!early_is_amd_nb(read_pci_config(bus, slot, 3, 0x00)))
continue;
ctl = read_pci_config(bus, slot, 3, AMD64_GARTAPERTURECTL);
dev_limit = bus_dev_ranges[i].dev_limit;
for (slot = dev_base; slot < dev_limit; slot++) {
- if (!early_is_k8_nb(read_pci_config(bus, slot, 3, 0x00)))
+ if (!early_is_amd_nb(read_pci_config(bus, slot, 3, 0x00)))
continue;
ctl = read_pci_config(bus, slot, 3, AMD64_GARTAPERTURECTL);
dev_limit = bus_dev_ranges[i].dev_limit;
for (slot = dev_base; slot < dev_limit; slot++) {
- if (!early_is_k8_nb(read_pci_config(bus, slot, 3, 0x00)))
+ if (!early_is_amd_nb(read_pci_config(bus, slot, 3, 0x00)))
continue;
iommu_detected = 1;
dev_base = bus_dev_ranges[i].dev_base;
dev_limit = bus_dev_ranges[i].dev_limit;
for (slot = dev_base; slot < dev_limit; slot++) {
- if (!early_is_k8_nb(read_pci_config(bus, slot, 3, 0x00)))
+ if (!early_is_amd_nb(read_pci_config(bus, slot, 3, 0x00)))
continue;
write_pci_config(bus, slot, 3, AMD64_GARTAPERTURECTL, ctl);
reserved = reserve_eilvt_offset(offset, new);
if (reserved != new) {
- pr_err(FW_BUG "cpu %d, try to setup vector 0x%x, but "
- "vector 0x%x was already reserved by another core, "
- "APIC%lX=0x%x\n",
- smp_processor_id(), new, reserved, reg, old);
+ pr_err(FW_BUG "cpu %d, try to use APIC%lX (LVT offset %d) for "
+ "vector 0x%x, but the register is already in use for "
+ "vector 0x%x on another cpu\n",
+ smp_processor_id(), reg, offset, new, reserved);
return -EINVAL;
}
if (!eilvt_entry_is_changeable(old, new)) {
- pr_err(FW_BUG "cpu %d, try to setup vector 0x%x but "
- "register already in use, APIC%lX=0x%x\n",
- smp_processor_id(), new, reg, old);
+ pr_err(FW_BUG "cpu %d, try to use APIC%lX (LVT offset %d) for "
+ "vector 0x%x, but the register is already in use for "
+ "vector 0x%x on this cpu\n",
+ smp_processor_id(), reg, offset, new, old);
return -EBUSY;
}
return 0;
}
#else
+
+static int apic_verify(void)
+{
+ u32 features, h, l;
+
+ /*
+ * The APIC feature bit should now be enabled
+ * in `cpuid'
+ */
+ features = cpuid_edx(1);
+ if (!(features & (1 << X86_FEATURE_APIC))) {
+ pr_warning("Could not enable APIC!\n");
+ return -1;
+ }
+ set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
+ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+
+ /* The BIOS may have set up the APIC at some other address */
+ rdmsr(MSR_IA32_APICBASE, l, h);
+ if (l & MSR_IA32_APICBASE_ENABLE)
+ mp_lapic_addr = l & MSR_IA32_APICBASE_BASE;
+
+ pr_info("Found and enabled local APIC!\n");
+ return 0;
+}
+
+int apic_force_enable(void)
+{
+ u32 h, l;
+
+ if (disable_apic)
+ return -1;
+
+ /*
+ * Some BIOSes disable the local APIC in the APIC_BASE
+ * MSR. This can only be done in software for Intel P6 or later
+ * and AMD K7 (Model > 1) or later.
+ */
+ rdmsr(MSR_IA32_APICBASE, l, h);
+ if (!(l & MSR_IA32_APICBASE_ENABLE)) {
+ pr_info("Local APIC disabled by BIOS -- reenabling.\n");
+ l &= ~MSR_IA32_APICBASE_BASE;
+ l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
+ wrmsr(MSR_IA32_APICBASE, l, h);
+ enabled_via_apicbase = 1;
+ }
+ return apic_verify();
+}
+
/*
* Detect and initialize APIC
*/
static int __init detect_init_APIC(void)
{
- u32 h, l, features;
-
/* Disabled by kernel option? */
if (disable_apic)
return -1;
"you can enable it with \"lapic\"\n");
return -1;
}
- /*
- * Some BIOSes disable the local APIC in the APIC_BASE
- * MSR. This can only be done in software for Intel P6 or later
- * and AMD K7 (Model > 1) or later.
- */
- rdmsr(MSR_IA32_APICBASE, l, h);
- if (!(l & MSR_IA32_APICBASE_ENABLE)) {
- pr_info("Local APIC disabled by BIOS -- reenabling.\n");
- l &= ~MSR_IA32_APICBASE_BASE;
- l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
- wrmsr(MSR_IA32_APICBASE, l, h);
- enabled_via_apicbase = 1;
- }
- }
- /*
- * The APIC feature bit should now be enabled
- * in `cpuid'
- */
- features = cpuid_edx(1);
- if (!(features & (1 << X86_FEATURE_APIC))) {
- pr_warning("Could not enable APIC!\n");
- return -1;
+ if (apic_force_enable())
+ return -1;
+ } else {
+ if (apic_verify())
+ return -1;
}
- set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
-
- /* The BIOS may have set up the APIC at some other address */
- rdmsr(MSR_IA32_APICBASE, l, h);
- if (l & MSR_IA32_APICBASE_ENABLE)
- mp_lapic_addr = l & MSR_IA32_APICBASE_BASE;
-
- pr_info("Found and enabled local APIC!\n");
apic_pm_activate();
* This initializes the IO-APIC and APIC hardware if this is
* a UP kernel.
*/
-int apic_version[MAX_APICS];
+int apic_version[MAX_LOCAL_APIC];
int __init APIC_init_uniprocessor(void)
{
*
* by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999
*/
-
-void __init setup_ioapic_ids_from_mpc(void)
+void __init setup_ioapic_ids_from_mpc_nocheck(void)
{
union IO_APIC_reg_00 reg_00;
physid_mask_t phys_id_present_map;
unsigned char old_id;
unsigned long flags;
- if (acpi_ioapic)
- return;
- /*
- * Don't check I/O APIC IDs for xAPIC systems. They have
- * no meaning without the serial APIC bus.
- */
- if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
- || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
- return;
/*
* This is broken; anything with a real cpu count has to
* circumvent this idiocy regardless.
physids_or(phys_id_present_map, phys_id_present_map, tmp);
}
-
/*
* We need to adjust the IRQ routing table
* if the ID changed.
apic_printk(APIC_VERBOSE, " ok.\n");
}
}
+
+void __init setup_ioapic_ids_from_mpc(void)
+{
+
+ if (acpi_ioapic)
+ return;
+ /*
+ * Don't check I/O APIC IDs for xAPIC systems. They have
+ * no meaning without the serial APIC bus.
+ */
+ if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+ return;
+ setup_ioapic_ids_from_mpc_nocheck();
+}
#endif
int no_timer_check __initdata;
return reg_01.bits.entries + 1;
}
-void __init probe_nr_irqs_gsi(void)
+static void __init probe_nr_irqs_gsi(void)
{
int nr;
return res;
}
-void __init ioapic_init_mappings(void)
+void __init ioapic_and_gsi_init(void)
{
unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
struct resource *ioapic_res;
ioapic_res->end = ioapic_phys + IO_APIC_SLOT_SIZE - 1;
ioapic_res++;
}
+
+ probe_nr_irqs_gsi();
}
void __init ioapic_insert_resources(void)
printk(KERN_INFO "Early APIC setup for system timer0\n");
#ifndef CONFIG_SMP
- phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
+ physid_set_mask_of_physid(boot_cpu_physical_apicid,
+ &phys_cpu_present_map);
#endif
/* Make sure the irq descriptor is set up */
cfg = alloc_irq_and_cfg_at(0, 0);
EXPORT_SYMBOL_GPL(uv_apicid_hibits);
static DEFINE_SPINLOCK(uv_nmi_lock);
+static unsigned long __init uv_early_read_mmr(unsigned long addr)
+{
+ unsigned long val, *mmr;
+
+ mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
+ val = *mmr;
+ early_iounmap(mmr, sizeof(*mmr));
+ return val;
+}
+
static inline bool is_GRU_range(u64 start, u64 end)
{
return start >= gru_start_paddr && end <= gru_end_paddr;
return is_ISA_range(start, end) || is_GRU_range(start, end);
}
-static int early_get_nodeid(void)
+static int __init early_get_pnodeid(void)
{
union uvh_node_id_u node_id;
- unsigned long *mmr;
-
- mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_NODE_ID, sizeof(*mmr));
- node_id.v = *mmr;
- early_iounmap(mmr, sizeof(*mmr));
+ union uvh_rh_gam_config_mmr_u m_n_config;
+ int pnode;
/* Currently, all blades have same revision number */
+ node_id.v = uv_early_read_mmr(UVH_NODE_ID);
+ m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR);
uv_min_hub_revision_id = node_id.s.revision;
- return node_id.s.node_id;
+ pnode = (node_id.s.node_id >> 1) & ((1 << m_n_config.s.n_skt) - 1);
+ return pnode;
}
static void __init early_get_apic_pnode_shift(void)
{
- unsigned long *mmr;
-
- mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_APICID, sizeof(*mmr));
- uvh_apicid.v = *mmr;
- early_iounmap(mmr, sizeof(*mmr));
+ uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
if (!uvh_apicid.v)
/*
* Old bios, use default value
static void __init uv_set_apicid_hibit(void)
{
union uvh_lb_target_physical_apic_id_mask_u apicid_mask;
- unsigned long *mmr;
- mmr = early_ioremap(UV_LOCAL_MMR_BASE |
- UVH_LB_TARGET_PHYSICAL_APIC_ID_MASK, sizeof(*mmr));
- apicid_mask.v = *mmr;
- early_iounmap(mmr, sizeof(*mmr));
+ apicid_mask.v = uv_early_read_mmr(UVH_LB_TARGET_PHYSICAL_APIC_ID_MASK);
uv_apicid_hibits = apicid_mask.s.bit_enables & UV_APICID_HIBIT_MASK;
}
static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- int nodeid;
+ int pnodeid;
if (!strcmp(oem_id, "SGI")) {
- nodeid = early_get_nodeid();
+ pnodeid = early_get_pnodeid();
early_get_apic_pnode_shift();
x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
x86_platform.nmi_init = uv_nmi_init;
uv_system_type = UV_X2APIC;
else if (!strcmp(oem_table_id, "UVH")) {
__get_cpu_var(x2apic_extra_bits) =
- nodeid << (uvh_apicid.s.pnode_shift - 1);
+ pnodeid << uvh_apicid.s.pnode_shift;
uv_system_type = UV_NON_UNIQUE_APIC;
uv_set_apicid_hibit();
return 1;
void __init uv_system_init(void)
{
union uvh_rh_gam_config_mmr_u m_n_config;
+ union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
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 bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val, n_io;
int gnode_extra, max_pnode = 0;
unsigned long mmr_base, present, paddr;
- unsigned short pnode_mask;
+ unsigned short pnode_mask, pnode_io_mask;
map_low_mmrs();
m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR );
m_val = m_n_config.s.m_skt;
n_val = m_n_config.s.n_skt;
+ mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
+ n_io = mmioh.s.n_io;
mmr_base =
uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
~UV_MMR_ENABLE;
pnode_mask = (1 << n_val) - 1;
+ pnode_io_mask = (1 << n_io) - 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_INFO "UV: N %d, M %d, N_IO: %d, gnode_upper 0x%lx, gnode_extra 0x%x, pnode_mask 0x%x, pnode_io_mask 0x%x\n",
+ n_val, m_val, n_io, gnode_upper, gnode_extra, pnode_mask, pnode_io_mask);
printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
for (j = 0; j < 64; j++) {
if (!test_bit(j, &present))
continue;
- pnode = (i * 64 + j);
+ pnode = (i * 64 + j) & pnode_mask;
uv_blade_info[blade].pnode = pnode;
uv_blade_info[blade].nr_possible_cpus = 0;
uv_blade_info[blade].nr_online_cpus = 0;
/*
* apic_pnode_shift must be set before calling uv_apicid_to_pnode();
*/
+ uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
uv_cpu_hub_info(cpu)->apic_pnode_shift = uvh_apicid.s.pnode_shift;
pnode = uv_apicid_to_pnode(apicid);
blade = boot_pnode_to_blade(pnode);
uv_cpu_hub_info(cpu)->numa_blade_id = blade;
uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
uv_cpu_hub_info(cpu)->pnode = pnode;
- uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
uv_cpu_hub_info(cpu)->gpa_mask = (1UL << (m_val + n_val)) - 1;
uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
map_gru_high(max_pnode);
map_mmr_high(max_pnode);
- map_mmioh_high(max_pnode);
+ map_mmioh_high(max_pnode & pnode_io_mask);
uv_cpu_init();
uv_scir_register_cpu_notifier();
};
struct amd_l3_cache {
- struct pci_dev *dev;
- bool can_disable;
+ struct amd_northbridge *nb;
unsigned indices;
u8 subcaches[4];
};
/*
* L3 cache descriptors
*/
-static struct amd_l3_cache **__cpuinitdata l3_caches;
-
static void __cpuinit amd_calc_l3_indices(struct amd_l3_cache *l3)
{
unsigned int sc0, sc1, sc2, sc3;
u32 val = 0;
- pci_read_config_dword(l3->dev, 0x1C4, &val);
+ pci_read_config_dword(l3->nb->misc, 0x1C4, &val);
/* calculate subcache sizes */
l3->subcaches[0] = sc0 = !(val & BIT(0));
l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1;
}
-static struct amd_l3_cache * __cpuinit amd_init_l3_cache(int node)
-{
- struct amd_l3_cache *l3;
- struct pci_dev *dev = node_to_k8_nb_misc(node);
-
- l3 = kzalloc(sizeof(struct amd_l3_cache), GFP_ATOMIC);
- if (!l3) {
- printk(KERN_WARNING "Error allocating L3 struct\n");
- return NULL;
- }
-
- l3->dev = dev;
-
- amd_calc_l3_indices(l3);
-
- return l3;
-}
-
-static void __cpuinit amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf,
- int index)
+static void __cpuinit amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf,
+ int index)
{
+ static struct amd_l3_cache *__cpuinitdata l3_caches;
int node;
- if (boot_cpu_data.x86 != 0x10)
- return;
-
- if (index < 3)
- return;
-
- /* see errata #382 and #388 */
- if (boot_cpu_data.x86_model < 0x8)
- return;
-
- if ((boot_cpu_data.x86_model == 0x8 ||
- boot_cpu_data.x86_model == 0x9)
- &&
- boot_cpu_data.x86_mask < 0x1)
- return;
-
- /* not in virtualized environments */
- if (k8_northbridges.num == 0)
+ /* only for L3, and not in virtualized environments */
+ if (index < 3 || amd_nb_num() == 0)
return;
/*
* never freed but this is done only on shutdown so it doesn't matter.
*/
if (!l3_caches) {
- int size = k8_northbridges.num * sizeof(struct amd_l3_cache *);
+ int size = amd_nb_num() * sizeof(struct amd_l3_cache);
l3_caches = kzalloc(size, GFP_ATOMIC);
if (!l3_caches)
node = amd_get_nb_id(smp_processor_id());
- if (!l3_caches[node]) {
- l3_caches[node] = amd_init_l3_cache(node);
- l3_caches[node]->can_disable = true;
+ if (!l3_caches[node].nb) {
+ l3_caches[node].nb = node_to_amd_nb(node);
+ amd_calc_l3_indices(&l3_caches[node]);
}
- WARN_ON(!l3_caches[node]);
-
- this_leaf->l3 = l3_caches[node];
+ this_leaf->l3 = &l3_caches[node];
}
/*
{
unsigned int reg = 0;
- pci_read_config_dword(l3->dev, 0x1BC + slot * 4, ®);
+ pci_read_config_dword(l3->nb->misc, 0x1BC + slot * 4, ®);
/* check whether this slot is activated already */
if (reg & (3UL << 30))
{
int index;
- if (!this_leaf->l3 || !this_leaf->l3->can_disable)
+ if (!this_leaf->l3 ||
+ !amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
return -EINVAL;
index = amd_get_l3_disable_slot(this_leaf->l3, slot);
if (!l3->subcaches[i])
continue;
- pci_write_config_dword(l3->dev, 0x1BC + slot * 4, reg);
+ pci_write_config_dword(l3->nb->misc, 0x1BC + slot * 4, reg);
/*
* We need to WBINVD on a core on the node containing the L3
wbinvd_on_cpu(cpu);
reg |= BIT(31);
- pci_write_config_dword(l3->dev, 0x1BC + slot * 4, reg);
+ pci_write_config_dword(l3->nb->misc, 0x1BC + slot * 4, reg);
}
}
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (!this_leaf->l3 || !this_leaf->l3->can_disable)
+ if (!this_leaf->l3 ||
+ !amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
return -EINVAL;
cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
#define STORE_CACHE_DISABLE(slot) \
static ssize_t \
store_cache_disable_##slot(struct _cpuid4_info *this_leaf, \
- const char *buf, size_t count) \
+ const char *buf, size_t count) \
{ \
return store_cache_disable(this_leaf, buf, count, slot); \
}
show_cache_disable_1, store_cache_disable_1);
#else /* CONFIG_AMD_NB */
-static void __cpuinit
-amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf, int index)
-{
-};
+#define amd_init_l3_cache(x, y)
#endif /* CONFIG_AMD_NB */
static int
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
amd_cpuid4(index, &eax, &ebx, &ecx);
- amd_check_l3_disable(this_leaf, index);
+ amd_init_l3_cache(this_leaf, index);
} else {
cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);
}
define_one_ro(shared_cpu_map);
define_one_ro(shared_cpu_list);
-#define DEFAULT_SYSFS_CACHE_ATTRS \
- &type.attr, \
- &level.attr, \
- &coherency_line_size.attr, \
- &physical_line_partition.attr, \
- &ways_of_associativity.attr, \
- &number_of_sets.attr, \
- &size.attr, \
- &shared_cpu_map.attr, \
- &shared_cpu_list.attr
-
static struct attribute *default_attrs[] = {
- DEFAULT_SYSFS_CACHE_ATTRS,
+ &type.attr,
+ &level.attr,
+ &coherency_line_size.attr,
+ &physical_line_partition.attr,
+ &ways_of_associativity.attr,
+ &number_of_sets.attr,
+ &size.attr,
+ &shared_cpu_map.attr,
+ &shared_cpu_list.attr,
NULL
};
-static struct attribute *default_l3_attrs[] = {
- DEFAULT_SYSFS_CACHE_ATTRS,
#ifdef CONFIG_AMD_NB
- &cache_disable_0.attr,
- &cache_disable_1.attr,
+static struct attribute ** __cpuinit amd_l3_attrs(void)
+{
+ static struct attribute **attrs;
+ int n;
+
+ if (attrs)
+ return attrs;
+
+ n = sizeof (default_attrs) / sizeof (struct attribute *);
+
+ if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
+ n += 2;
+
+ attrs = kzalloc(n * sizeof (struct attribute *), GFP_KERNEL);
+ if (attrs == NULL)
+ return attrs = default_attrs;
+
+ for (n = 0; default_attrs[n]; n++)
+ attrs[n] = default_attrs[n];
+
+ if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) {
+ attrs[n++] = &cache_disable_0.attr;
+ attrs[n++] = &cache_disable_1.attr;
+ }
+
+ return attrs;
+}
#endif
- NULL
-};
static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
{
this_leaf = CPUID4_INFO_IDX(cpu, i);
- if (this_leaf->l3 && this_leaf->l3->can_disable)
- ktype_cache.default_attrs = default_l3_attrs;
- else
- ktype_cache.default_attrs = default_attrs;
-
+ ktype_cache.default_attrs = default_attrs;
+#ifdef CONFIG_AMD_NB
+ if (this_leaf->l3)
+ ktype_cache.default_attrs = amd_l3_attrs();
+#endif
retval = kobject_init_and_add(&(this_object->kobj),
&ktype_cache,
per_cpu(ici_cache_kobject, cpu),
#include <asm/mce.h>
#include <asm/msr.h>
-#define PFX "mce_threshold: "
-#define VERSION "version 1.1.1"
#define NR_BANKS 6
#define NR_BLOCKS 9
#define THRESHOLD_MAX 0xFFF
struct list_head miscj;
};
-/* defaults used early on boot */
-static struct threshold_block threshold_defaults = {
- .interrupt_enable = 0,
- .threshold_limit = THRESHOLD_MAX,
-};
-
struct threshold_bank {
struct kobject *kobj;
struct threshold_block *blocks;
struct thresh_restart {
struct threshold_block *b;
int reset;
+ int set_lvt_off;
+ int lvt_off;
u16 old_limit;
};
+static int lvt_off_valid(struct threshold_block *b, int apic, u32 lo, u32 hi)
+{
+ int msr = (hi & MASK_LVTOFF_HI) >> 20;
+
+ if (apic < 0) {
+ pr_err(FW_BUG "cpu %d, failed to setup threshold interrupt "
+ "for bank %d, block %d (MSR%08X=0x%x%08x)\n", b->cpu,
+ b->bank, b->block, b->address, hi, lo);
+ return 0;
+ }
+
+ if (apic != msr) {
+ pr_err(FW_BUG "cpu %d, invalid threshold interrupt offset %d "
+ "for bank %d, block %d (MSR%08X=0x%x%08x)\n",
+ b->cpu, apic, b->bank, b->block, b->address, hi, lo);
+ return 0;
+ }
+
+ return 1;
+};
+
/* must be called with correct cpu affinity */
/* Called via smp_call_function_single() */
static void threshold_restart_bank(void *_tr)
{
struct thresh_restart *tr = _tr;
- u32 mci_misc_hi, mci_misc_lo;
+ u32 hi, lo;
- rdmsr(tr->b->address, mci_misc_lo, mci_misc_hi);
+ rdmsr(tr->b->address, lo, hi);
- if (tr->b->threshold_limit < (mci_misc_hi & THRESHOLD_MAX))
+ if (tr->b->threshold_limit < (hi & THRESHOLD_MAX))
tr->reset = 1; /* limit cannot be lower than err count */
if (tr->reset) { /* reset err count and overflow bit */
- mci_misc_hi =
- (mci_misc_hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) |
+ hi =
+ (hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) |
(THRESHOLD_MAX - tr->b->threshold_limit);
} else if (tr->old_limit) { /* change limit w/o reset */
- int new_count = (mci_misc_hi & THRESHOLD_MAX) +
+ int new_count = (hi & THRESHOLD_MAX) +
(tr->old_limit - tr->b->threshold_limit);
- mci_misc_hi = (mci_misc_hi & ~MASK_ERR_COUNT_HI) |
+ hi = (hi & ~MASK_ERR_COUNT_HI) |
(new_count & THRESHOLD_MAX);
}
+ if (tr->set_lvt_off) {
+ if (lvt_off_valid(tr->b, tr->lvt_off, lo, hi)) {
+ /* set new lvt offset */
+ hi &= ~MASK_LVTOFF_HI;
+ hi |= tr->lvt_off << 20;
+ }
+ }
+
tr->b->interrupt_enable ?
- (mci_misc_hi = (mci_misc_hi & ~MASK_INT_TYPE_HI) | INT_TYPE_APIC) :
- (mci_misc_hi &= ~MASK_INT_TYPE_HI);
+ (hi = (hi & ~MASK_INT_TYPE_HI) | INT_TYPE_APIC) :
+ (hi &= ~MASK_INT_TYPE_HI);
- mci_misc_hi |= MASK_COUNT_EN_HI;
- wrmsr(tr->b->address, mci_misc_lo, mci_misc_hi);
+ hi |= MASK_COUNT_EN_HI;
+ wrmsr(tr->b->address, lo, hi);
+}
+
+static void mce_threshold_block_init(struct threshold_block *b, int offset)
+{
+ struct thresh_restart tr = {
+ .b = b,
+ .set_lvt_off = 1,
+ .lvt_off = offset,
+ };
+
+ b->threshold_limit = THRESHOLD_MAX;
+ threshold_restart_bank(&tr);
+};
+
+static int setup_APIC_mce(int reserved, int new)
+{
+ if (reserved < 0 && !setup_APIC_eilvt(new, THRESHOLD_APIC_VECTOR,
+ APIC_EILVT_MSG_FIX, 0))
+ return new;
+
+ return reserved;
}
/* cpu init entry point, called from mce.c with preempt off */
void mce_amd_feature_init(struct cpuinfo_x86 *c)
{
+ struct threshold_block b;
unsigned int cpu = smp_processor_id();
u32 low = 0, high = 0, address = 0;
unsigned int bank, block;
- struct thresh_restart tr;
- int lvt_off = -1;
- u8 offset;
+ int offset = -1;
for (bank = 0; bank < NR_BANKS; ++bank) {
for (block = 0; block < NR_BLOCKS; ++block) {
if (shared_bank[bank] && c->cpu_core_id)
break;
#endif
- offset = (high & MASK_LVTOFF_HI) >> 20;
- if (lvt_off < 0) {
- if (setup_APIC_eilvt(offset,
- THRESHOLD_APIC_VECTOR,
- APIC_EILVT_MSG_FIX, 0)) {
- pr_err(FW_BUG "cpu %d, failed to "
- "setup threshold interrupt "
- "for bank %d, block %d "
- "(MSR%08X=0x%x%08x)",
- smp_processor_id(), bank, block,
- address, high, low);
- continue;
- }
- lvt_off = offset;
- } else if (lvt_off != offset) {
- pr_err(FW_BUG "cpu %d, invalid threshold "
- "interrupt offset %d for bank %d,"
- "block %d (MSR%08X=0x%x%08x)",
- smp_processor_id(), lvt_off, bank,
- block, address, high, low);
- continue;
- }
-
- high &= ~MASK_LVTOFF_HI;
- high |= lvt_off << 20;
- wrmsr(address, low, high);
+ offset = setup_APIC_mce(offset,
+ (high & MASK_LVTOFF_HI) >> 20);
- threshold_defaults.address = address;
- tr.b = &threshold_defaults;
- tr.reset = 0;
- tr.old_limit = 0;
- threshold_restart_bank(&tr);
+ memset(&b, 0, sizeof(b));
+ b.cpu = cpu;
+ b.bank = bank;
+ b.block = block;
+ b.address = address;
+ mce_threshold_block_init(&b, offset);
mce_threshold_vector = amd_threshold_interrupt;
}
}
b->interrupt_enable = !!new;
+ memset(&tr, 0, sizeof(tr));
tr.b = b;
- tr.reset = 0;
- tr.old_limit = 0;
smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
if (new < 1)
new = 1;
+ memset(&tr, 0, sizeof(tr));
tr.old_limit = b->threshold_limit;
b->threshold_limit = new;
tr.b = b;
- tr.reset = 0;
smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
continue;
err = threshold_create_bank(cpu, bank);
if (err)
- goto out;
+ return err;
}
-out:
+
return err;
}
struct _thermal_state core_power_limit;
struct _thermal_state package_throttle;
struct _thermal_state package_power_limit;
+ struct _thermal_state core_thresh0;
+ struct _thermal_state core_thresh1;
};
+/* Callback to handle core threshold interrupts */
+int (*platform_thermal_notify)(__u64 msr_val);
+
static DEFINE_PER_CPU(struct thermal_state, thermal_state);
static atomic_t therm_throt_en = ATOMIC_INIT(0);
return 0;
}
+static int thresh_event_valid(int event)
+{
+ struct _thermal_state *state;
+ unsigned int this_cpu = smp_processor_id();
+ struct thermal_state *pstate = &per_cpu(thermal_state, this_cpu);
+ u64 now = get_jiffies_64();
+
+ state = (event == 0) ? &pstate->core_thresh0 : &pstate->core_thresh1;
+
+ if (time_before64(now, state->next_check))
+ return 0;
+
+ state->next_check = now + CHECK_INTERVAL;
+ return 1;
+}
+
#ifdef CONFIG_SYSFS
/* Add/Remove thermal_throttle interface for CPU device: */
static __cpuinit int thermal_throttle_add_dev(struct sys_device *sys_dev,
#define PACKAGE_THROTTLED ((__u64)2 << 62)
#define PACKAGE_POWER_LIMIT ((__u64)3 << 62)
+static void notify_thresholds(__u64 msr_val)
+{
+ /* check whether the interrupt handler is defined;
+ * otherwise simply return
+ */
+ if (!platform_thermal_notify)
+ return;
+
+ /* lower threshold reached */
+ if ((msr_val & THERM_LOG_THRESHOLD0) && thresh_event_valid(0))
+ platform_thermal_notify(msr_val);
+ /* higher threshold reached */
+ if ((msr_val & THERM_LOG_THRESHOLD1) && thresh_event_valid(1))
+ platform_thermal_notify(msr_val);
+}
+
/* Thermal transition interrupt handler */
static void intel_thermal_interrupt(void)
{
rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
+ /* Check for violation of core thermal thresholds*/
+ notify_thresholds(msr_val);
+
if (therm_throt_process(msr_val & THERM_STATUS_PROCHOT,
THERMAL_THROTTLING_EVENT,
CORE_LEVEL) != 0)
if (!strncmp(buf, "xen", 3))
early_console_register(&xenboot_console, keep);
#endif
-#ifdef CONFIG_X86_MRST_EARLY_PRINTK
+#ifdef CONFIG_EARLY_PRINTK_MRST
if (!strncmp(buf, "mrst", 4)) {
mrst_early_console_init();
early_console_register(&early_mrst_console, keep);
hsu_early_console_init();
early_console_register(&early_hsu_console, keep);
}
-
#endif
buf++;
}
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/list.h>
+#include <linux/module.h>
#include <trace/syscall.h>
int ftrace_arch_code_modify_prepare(void)
{
set_kernel_text_rw();
+ set_all_modules_text_rw();
modifying_code = 1;
return 0;
}
int ftrace_arch_code_modify_post_process(void)
{
modifying_code = 0;
+ set_all_modules_text_ro();
set_kernel_text_ro();
return 0;
}
case X86_SUBARCH_MRST:
x86_mrst_early_setup();
break;
+ case X86_SUBARCH_CE4100:
+ x86_ce4100_early_setup();
+ break;
default:
i386_default_early_setup();
break;
movl %eax, pa(olpc_ofw_pgd)
#endif
-#ifdef CONFIG_PARAVIRT
- /* This is can only trip for a broken bootloader... */
- cmpw $0x207, pa(boot_params + BP_version)
- jb default_entry
-
- /* Paravirt-compatible boot parameters. Look to see what architecture
- we're booting under. */
- movl pa(boot_params + BP_hardware_subarch), %eax
- cmpl $num_subarch_entries, %eax
- jae bad_subarch
-
- movl pa(subarch_entries)(,%eax,4), %eax
- subl $__PAGE_OFFSET, %eax
- jmp *%eax
-
-bad_subarch:
-WEAK(lguest_entry)
-WEAK(xen_entry)
- /* Unknown implementation; there's really
- nothing we can do at this point. */
- ud2a
-
- __INITDATA
-
-subarch_entries:
- .long default_entry /* normal x86/PC */
- .long lguest_entry /* lguest hypervisor */
- .long xen_entry /* Xen hypervisor */
- .long default_entry /* Moorestown MID */
-num_subarch_entries = (. - subarch_entries) / 4
-.previous
-#endif /* CONFIG_PARAVIRT */
-
/*
* Initialize page tables. This creates a PDE and a set of page
* tables, which are located immediately beyond __brk_base. The variable
*
* Note that the stack is not yet set up!
*/
-default_entry:
#ifdef CONFIG_X86_PAE
/*
movl $pa(initial_pg_fixmap)+PDE_IDENT_ATTR,%eax
movl %eax,pa(initial_page_table+0xffc)
#endif
- jmp 3f
+
+#ifdef CONFIG_PARAVIRT
+ /* This is can only trip for a broken bootloader... */
+ cmpw $0x207, pa(boot_params + BP_version)
+ jb default_entry
+
+ /* Paravirt-compatible boot parameters. Look to see what architecture
+ we're booting under. */
+ movl pa(boot_params + BP_hardware_subarch), %eax
+ cmpl $num_subarch_entries, %eax
+ jae bad_subarch
+
+ movl pa(subarch_entries)(,%eax,4), %eax
+ subl $__PAGE_OFFSET, %eax
+ jmp *%eax
+
+bad_subarch:
+WEAK(lguest_entry)
+WEAK(xen_entry)
+ /* Unknown implementation; there's really
+ nothing we can do at this point. */
+ ud2a
+
+ __INITDATA
+
+subarch_entries:
+ .long default_entry /* normal x86/PC */
+ .long lguest_entry /* lguest hypervisor */
+ .long xen_entry /* Xen hypervisor */
+ .long default_entry /* Moorestown MID */
+num_subarch_entries = (. - subarch_entries) / 4
+.previous
+#else
+ jmp default_entry
+#endif /* CONFIG_PARAVIRT */
+
/*
* Non-boot CPU entry point; entered from trampoline.S
* We can't lgdt here, because lgdt itself uses a data segment, but
movl %eax,%fs
movl %eax,%gs
#endif /* CONFIG_SMP */
-3:
+default_entry:
/*
* New page tables may be in 4Mbyte page mode and may
subl $0x80000001, %eax
cmpl $(0x8000ffff-0x80000001), %eax
ja 6f
+
+ /* Clear bogus XD_DISABLE bits */
+ call verify_cpu
+
mov $0x80000001, %eax
cpuid
/* Execute Disable bit supported? */
#endif
iret
+#include "verify_cpu.S"
+
__REFDATA
.align 4
ENTRY(initial_code)
__PAGE_ALIGNED_BSS
.align PAGE_SIZE_asm
#ifdef CONFIG_X86_PAE
-ENTRY(initial_pg_pmd)
+initial_pg_pmd:
.fill 1024*KPMDS,4,0
#else
ENTRY(initial_page_table)
.fill 1024,4,0
#endif
-ENTRY(initial_pg_fixmap)
+initial_pg_fixmap:
.fill 1024,4,0
ENTRY(empty_zero_page)
.fill 4096,1,0
return 0;
}
-static int get_ucode_data(void *to, const u8 *from, size_t n)
-{
- memcpy(to, from, n);
- return 0;
-}
-
static void *
get_next_ucode(const u8 *buf, unsigned int size, unsigned int *mc_size)
{
u8 section_hdr[UCODE_CONTAINER_SECTION_HDR];
void *mc;
- if (get_ucode_data(section_hdr, buf, UCODE_CONTAINER_SECTION_HDR))
- return NULL;
+ get_ucode_data(section_hdr, buf, UCODE_CONTAINER_SECTION_HDR);
if (section_hdr[0] != UCODE_UCODE_TYPE) {
pr_err("error: invalid type field in container file section header\n");
return NULL;
}
- mc = vmalloc(UCODE_MAX_SIZE);
- if (mc) {
- memset(mc, 0, UCODE_MAX_SIZE);
- if (get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR,
- total_size)) {
- vfree(mc);
- mc = NULL;
- } else
- *mc_size = total_size + UCODE_CONTAINER_SECTION_HDR;
- }
+ mc = vzalloc(UCODE_MAX_SIZE);
+ if (!mc)
+ return NULL;
+
+ get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR, total_size);
+ *mc_size = total_size + UCODE_CONTAINER_SECTION_HDR;
+
return mc;
}
unsigned int *buf_pos = (unsigned int *)container_hdr;
unsigned long size;
- if (get_ucode_data(&container_hdr, buf, UCODE_CONTAINER_HEADER_SIZE))
- return 0;
+ get_ucode_data(&container_hdr, buf, UCODE_CONTAINER_HEADER_SIZE);
size = buf_pos[2];
}
buf += UCODE_CONTAINER_HEADER_SIZE;
- if (get_ucode_data(equiv_cpu_table, buf, size)) {
- vfree(equiv_cpu_table);
- return 0;
- }
+ get_ucode_data(equiv_cpu_table, buf, size);
return size + UCODE_CONTAINER_HEADER_SIZE; /* add header length */
}
spin_lock_irqsave(&iommu_bitmap_lock, flags);
if (need_flush) {
- k8_flush_garts();
+ amd_flush_garts();
need_flush = false;
}
spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
{
int i;
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return;
- for (i = 0; i < k8_northbridges.num; i++) {
- struct pci_dev *dev = k8_northbridges.nb_misc[i];
+ for (i = 0; i < amd_nb_num(); i++) {
+ struct pci_dev *dev = node_to_amd_nb(i)->misc;
enable_gart_translation(dev, __pa(agp_gatt_table));
}
/* Flush the GART-TLB to remove stale entries */
- k8_flush_garts();
+ amd_flush_garts();
}
/*
if (!fix_up_north_bridges)
return;
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return;
pr_info("PCI-DMA: Restoring GART aperture settings\n");
- for (i = 0; i < k8_northbridges.num; i++) {
- struct pci_dev *dev = k8_northbridges.nb_misc[i];
+ for (i = 0; i < amd_nb_num(); i++) {
+ struct pci_dev *dev = node_to_amd_nb(i)->misc;
/*
* Don't enable translations just yet. That is the next
* Private Northbridge GATT initialization in case we cannot use the
* AGP driver for some reason.
*/
-static __init int init_k8_gatt(struct agp_kern_info *info)
+static __init int init_amd_gatt(struct agp_kern_info *info)
{
unsigned aper_size, gatt_size, new_aper_size;
unsigned aper_base, new_aper_base;
aper_size = aper_base = info->aper_size = 0;
dev = NULL;
- for (i = 0; i < k8_northbridges.num; i++) {
- dev = k8_northbridges.nb_misc[i];
+ for (i = 0; i < amd_nb_num(); i++) {
+ dev = node_to_amd_nb(i)->misc;
new_aper_base = read_aperture(dev, &new_aper_size);
if (!new_aper_base)
goto nommu;
if (!no_agp)
return;
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return;
- for (i = 0; i < k8_northbridges.num; i++) {
+ for (i = 0; i < amd_nb_num(); i++) {
u32 ctl;
- dev = k8_northbridges.nb_misc[i];
+ dev = node_to_amd_nb(i)->misc;
pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
ctl &= ~GARTEN;
unsigned long scratch;
long i;
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return 0;
#ifndef CONFIG_AGP_AMD64
no_agp = 1;
#else
/* Makefile puts PCI initialization via subsys_initcall first. */
- /* Add other K8 AGP bridge drivers here */
+ /* Add other AMD AGP bridge drivers here */
no_agp = no_agp ||
(agp_amd64_init() < 0) ||
(agp_copy_info(agp_bridge, &info) < 0);
if (no_iommu ||
(!force_iommu && max_pfn <= MAX_DMA32_PFN) ||
!gart_iommu_aperture ||
- (no_agp && init_k8_gatt(&info) < 0)) {
+ (no_agp && init_amd_gatt(&info) < 0)) {
if (max_pfn > MAX_DMA32_PFN) {
pr_warning("More than 4GB of memory but GART IOMMU not available.\n");
pr_warning("falling back to iommu=soft.\n");
outb(1, 0x92);
}
+static void ce4100_reset(struct pci_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < 10; i++) {
+ outb(0x2, 0xcf9);
+ udelay(50);
+ }
+}
+
struct device_fixup {
unsigned int vendor;
unsigned int device;
void (*reboot_fixup)(struct pci_dev *);
};
+/*
+ * PCI ids solely used for fixups_table go here
+ */
+#define PCI_DEVICE_ID_INTEL_CE4100 0x0708
+
static const struct device_fixup fixups_table[] = {
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
{ PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE, cs5530a_warm_reset },
{ PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030, rdc321x_reset },
+{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CE4100, ce4100_reset },
};
/*
void __init setup_arch(char **cmdline_p)
{
int acpi = 0;
- int k8 = 0;
+ int amd = 0;
unsigned long flags;
#ifdef CONFIG_X86_32
acpi = acpi_numa_init();
#endif
-#ifdef CONFIG_K8_NUMA
+#ifdef CONFIG_AMD_NUMA
if (!acpi)
- k8 = !k8_numa_init(0, max_pfn);
+ amd = !amd_numa_init(0, max_pfn);
#endif
- initmem_init(0, max_pfn, acpi, k8);
+ initmem_init(0, max_pfn, acpi, amd);
memblock_find_dma_reserve();
dma32_reserve_bootmem();
#endif
init_apic_mappings();
- ioapic_init_mappings();
-
- /* need to wait for io_apic is mapped */
- probe_nr_irqs_gsi();
+ ioapic_and_gsi_init();
kvm_guest_init();
preempt_enable();
}
+void arch_disable_nonboot_cpus_begin(void)
+{
+ /*
+ * Avoid the smp alternatives switch during the disable_nonboot_cpus().
+ * In the suspend path, we will be back in the SMP mode shortly anyways.
+ */
+ skip_smp_alternatives = true;
+}
+
+void arch_disable_nonboot_cpus_end(void)
+{
+ skip_smp_alternatives = false;
+}
+
void arch_enable_nonboot_cpus_begin(void)
{
set_mtrr_aps_delayed_init();
no_longmode:
hlt
jmp no_longmode
-#include "verify_cpu_64.S"
+#include "verify_cpu.S"
# Careful these need to be in the same 64K segment as the above;
tidt:
if (boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
return 0;
+
+ if (tsc_clocksource_reliable)
+ return 0;
/*
* Intel systems are normally all synchronized.
* Exceptions must mark TSC as unstable:
if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL) {
/* assume multi socket systems are not synchronized: */
if (num_possible_cpus() > 1)
- tsc_unstable = 1;
+ return 1;
}
- return tsc_unstable;
+ return 0;
+}
+
+
+static void tsc_refine_calibration_work(struct work_struct *work);
+static DECLARE_DELAYED_WORK(tsc_irqwork, tsc_refine_calibration_work);
+/**
+ * tsc_refine_calibration_work - Further refine tsc freq calibration
+ * @work - ignored.
+ *
+ * This functions uses delayed work over a period of a
+ * second to further refine the TSC freq value. Since this is
+ * timer based, instead of loop based, we don't block the boot
+ * process while this longer calibration is done.
+ *
+ * If there are any calibration anomolies (too many SMIs, etc),
+ * or the refined calibration is off by 1% of the fast early
+ * calibration, we throw out the new calibration and use the
+ * early calibration.
+ */
+static void tsc_refine_calibration_work(struct work_struct *work)
+{
+ static u64 tsc_start = -1, ref_start;
+ static int hpet;
+ u64 tsc_stop, ref_stop, delta;
+ unsigned long freq;
+
+ /* Don't bother refining TSC on unstable systems */
+ if (check_tsc_unstable())
+ goto out;
+
+ /*
+ * Since the work is started early in boot, we may be
+ * delayed the first time we expire. So set the workqueue
+ * again once we know timers are working.
+ */
+ if (tsc_start == -1) {
+ /*
+ * Only set hpet once, to avoid mixing hardware
+ * if the hpet becomes enabled later.
+ */
+ hpet = is_hpet_enabled();
+ schedule_delayed_work(&tsc_irqwork, HZ);
+ tsc_start = tsc_read_refs(&ref_start, hpet);
+ return;
+ }
+
+ tsc_stop = tsc_read_refs(&ref_stop, hpet);
+
+ /* hpet or pmtimer available ? */
+ if (!hpet && !ref_start && !ref_stop)
+ goto out;
+
+ /* Check, whether the sampling was disturbed by an SMI */
+ if (tsc_start == ULLONG_MAX || tsc_stop == ULLONG_MAX)
+ goto out;
+
+ delta = tsc_stop - tsc_start;
+ delta *= 1000000LL;
+ if (hpet)
+ freq = calc_hpet_ref(delta, ref_start, ref_stop);
+ else
+ freq = calc_pmtimer_ref(delta, ref_start, ref_stop);
+
+ /* Make sure we're within 1% */
+ if (abs(tsc_khz - freq) > tsc_khz/100)
+ goto out;
+
+ tsc_khz = freq;
+ printk(KERN_INFO "Refined TSC clocksource calibration: "
+ "%lu.%03lu MHz.\n", (unsigned long)tsc_khz / 1000,
+ (unsigned long)tsc_khz % 1000);
+
+out:
+ clocksource_register_khz(&clocksource_tsc, tsc_khz);
}
-static void __init init_tsc_clocksource(void)
+
+static int __init init_tsc_clocksource(void)
{
+ if (!cpu_has_tsc || tsc_disabled > 0)
+ return 0;
+
if (tsc_clocksource_reliable)
clocksource_tsc.flags &= ~CLOCK_SOURCE_MUST_VERIFY;
/* lower the rating if we already know its unstable: */
clocksource_tsc.rating = 0;
clocksource_tsc.flags &= ~CLOCK_SOURCE_IS_CONTINUOUS;
}
- clocksource_register_khz(&clocksource_tsc, tsc_khz);
+ schedule_delayed_work(&tsc_irqwork, 0);
+ return 0;
}
+/*
+ * We use device_initcall here, to ensure we run after the hpet
+ * is fully initialized, which may occur at fs_initcall time.
+ */
+device_initcall(init_tsc_clocksource);
void __init tsc_init(void)
{
mark_tsc_unstable("TSCs unsynchronized");
check_system_tsc_reliable();
- init_tsc_clocksource();
}
* Copyright (c) 2007 Andi Kleen (ak@suse.de)
* Copyright (c) 2007 Eric Biederman (ebiederm@xmission.com)
* Copyright (c) 2007 Vivek Goyal (vgoyal@in.ibm.com)
+ * Copyright (c) 2010 Kees Cook (kees.cook@canonical.com)
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
* This is a common code for verification whether CPU supports
* long mode and SSE or not. It is not called directly instead this
* file is included at various places and compiled in that context.
- * Following are the current usage.
+ * This file is expected to run in 32bit code. Currently:
*
- * This file is included by both 16bit and 32bit code.
+ * arch/x86/boot/compressed/head_64.S: Boot cpu verification
+ * arch/x86/kernel/trampoline_64.S: secondary processor verfication
+ * arch/x86/kernel/head_32.S: processor startup
*
- * arch/x86_64/boot/setup.S : Boot cpu verification (16bit)
- * arch/x86_64/boot/compressed/head.S: Boot cpu verification (32bit)
- * arch/x86_64/kernel/trampoline.S: secondary processor verfication (16bit)
- * arch/x86_64/kernel/acpi/wakeup.S:Verfication at resume (16bit)
- *
- * verify_cpu, returns the status of cpu check in register %eax.
+ * verify_cpu, returns the status of longmode and SSE in register %eax.
* 0: Success 1: Failure
*
+ * On Intel, the XD_DISABLE flag will be cleared as a side-effect.
+ *
* The caller needs to check for the error code and take the action
* appropriately. Either display a message or halt.
*/
cmpl $0x444d4163,%ecx
jnz verify_cpu_noamd
mov $1,%di # cpu is from AMD
+ jmp verify_cpu_check
verify_cpu_noamd:
+ cmpl $0x756e6547,%ebx # GenuineIntel?
+ jnz verify_cpu_check
+ cmpl $0x49656e69,%edx
+ jnz verify_cpu_check
+ cmpl $0x6c65746e,%ecx
+ jnz verify_cpu_check
+
+ # only call IA32_MISC_ENABLE when:
+ # family > 6 || (family == 6 && model >= 0xd)
+ movl $0x1, %eax # check CPU family and model
+ cpuid
+ movl %eax, %ecx
+
+ andl $0x0ff00f00, %eax # mask family and extended family
+ shrl $8, %eax
+ cmpl $6, %eax
+ ja verify_cpu_clear_xd # family > 6, ok
+ jb verify_cpu_check # family < 6, skip
+
+ andl $0x000f00f0, %ecx # mask model and extended model
+ shrl $4, %ecx
+ cmpl $0xd, %ecx
+ jb verify_cpu_check # family == 6, model < 0xd, skip
+
+verify_cpu_clear_xd:
+ movl $MSR_IA32_MISC_ENABLE, %ecx
+ rdmsr
+ btrl $2, %edx # clear MSR_IA32_MISC_ENABLE_XD_DISABLE
+ jnc verify_cpu_check # only write MSR if bit was changed
+ wrmsr
+
+verify_cpu_check:
movl $0x1,%eax # Does the cpu have what it takes
cpuid
andl $REQUIRED_MASK0,%edx
PHDRS {
text PT_LOAD FLAGS(5); /* R_E */
- data PT_LOAD FLAGS(7); /* RWE */
+ data PT_LOAD FLAGS(6); /* RW_ */
#ifdef CONFIG_X86_64
user PT_LOAD FLAGS(5); /* R_E */
#ifdef CONFIG_SMP
EXCEPTION_TABLE(16) :text = 0x9090
+#if defined(CONFIG_DEBUG_RODATA)
+ /* .text should occupy whole number of pages */
+ . = ALIGN(PAGE_SIZE);
+#endif
X64_ALIGN_DEBUG_RODATA_BEGIN
RO_DATA(PAGE_SIZE)
X64_ALIGN_DEBUG_RODATA_END
__bss_start = .;
*(.bss..page_aligned)
*(.bss)
- . = ALIGN(4);
+ . = ALIGN(PAGE_SIZE);
__bss_stop = .;
}
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#include <asm/processor-flags.h>
-#include <asm/pgtable.h>
/*G:020
* Our story starts with the kernel booting into startup_32 in
/* Set up the initial stack so we can run C code. */
movl $(init_thread_union+THREAD_SIZE),%esp
- call init_pagetables
-
/* Jumps are relative: we're running __PAGE_OFFSET too low. */
jmp lguest_init+__PAGE_OFFSET
-/*
- * Initialize page tables. This creates a PDE and a set of page
- * tables, which are located immediately beyond __brk_base. The variable
- * _brk_end is set up to point to the first "safe" location.
- * Mappings are created both at virtual address 0 (identity mapping)
- * and PAGE_OFFSET for up to _end.
- *
- * FIXME: This code is taken verbatim from arch/x86/kernel/head_32.S: they
- * don't have a stack at this point, so we can't just use call and ret.
- */
-init_pagetables:
-#if PTRS_PER_PMD > 1
-#define PAGE_TABLE_SIZE(pages) (((pages) / PTRS_PER_PMD) + PTRS_PER_PGD)
-#else
-#define PAGE_TABLE_SIZE(pages) ((pages) / PTRS_PER_PGD)
-#endif
-#define pa(X) ((X) - __PAGE_OFFSET)
-
-/* Enough space to fit pagetables for the low memory linear map */
-MAPPING_BEYOND_END = \
- PAGE_TABLE_SIZE(((1<<32) - __PAGE_OFFSET) >> PAGE_SHIFT) << PAGE_SHIFT
-#ifdef CONFIG_X86_PAE
-
- /*
- * In PAE mode initial_page_table is statically defined to contain
- * enough entries to cover the VMSPLIT option (that is the top 1, 2 or 3
- * entries). The identity mapping is handled by pointing two PGD entries
- * to the first kernel PMD.
- *
- * Note the upper half of each PMD or PTE are always zero at this stage.
- */
-
-#define KPMDS (((-__PAGE_OFFSET) >> 30) & 3) /* Number of kernel PMDs */
-
- xorl %ebx,%ebx /* %ebx is kept at zero */
-
- movl $pa(__brk_base), %edi
- movl $pa(initial_pg_pmd), %edx
- movl $PTE_IDENT_ATTR, %eax
-10:
- leal PDE_IDENT_ATTR(%edi),%ecx /* Create PMD entry */
- movl %ecx,(%edx) /* Store PMD entry */
- /* Upper half already zero */
- addl $8,%edx
- movl $512,%ecx
-11:
- stosl
- xchgl %eax,%ebx
- stosl
- xchgl %eax,%ebx
- addl $0x1000,%eax
- loop 11b
-
- /*
- * End condition: we must map up to the end + MAPPING_BEYOND_END.
- */
- movl $pa(_end) + MAPPING_BEYOND_END + PTE_IDENT_ATTR, %ebp
- cmpl %ebp,%eax
- jb 10b
-1:
- addl $__PAGE_OFFSET, %edi
- movl %edi, pa(_brk_end)
- shrl $12, %eax
- movl %eax, pa(max_pfn_mapped)
-
- /* Do early initialization of the fixmap area */
- movl $pa(initial_pg_fixmap)+PDE_IDENT_ATTR,%eax
- movl %eax,pa(initial_pg_pmd+0x1000*KPMDS-8)
-#else /* Not PAE */
-
-page_pde_offset = (__PAGE_OFFSET >> 20);
-
- movl $pa(__brk_base), %edi
- movl $pa(initial_page_table), %edx
- movl $PTE_IDENT_ATTR, %eax
-10:
- leal PDE_IDENT_ATTR(%edi),%ecx /* Create PDE entry */
- movl %ecx,(%edx) /* Store identity PDE entry */
- movl %ecx,page_pde_offset(%edx) /* Store kernel PDE entry */
- addl $4,%edx
- movl $1024, %ecx
-11:
- stosl
- addl $0x1000,%eax
- loop 11b
- /*
- * End condition: we must map up to the end + MAPPING_BEYOND_END.
- */
- movl $pa(_end) + MAPPING_BEYOND_END + PTE_IDENT_ATTR, %ebp
- cmpl %ebp,%eax
- jb 10b
- addl $__PAGE_OFFSET, %edi
- movl %edi, pa(_brk_end)
- shrl $12, %eax
- movl %eax, pa(max_pfn_mapped)
-
- /* Do early initialization of the fixmap area */
- movl $pa(initial_pg_fixmap)+PDE_IDENT_ATTR,%eax
- movl %eax,pa(initial_page_table+0xffc)
-#endif
- ret
-
/*G:055
* We create a macro which puts the assembler code between lgstart_ and lgend_
* markers. These templates are put in the .text section: they can't be
obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
obj-$(CONFIG_NUMA) += numa.o numa_$(BITS).o
-obj-$(CONFIG_K8_NUMA) += k8topology_64.o
+obj-$(CONFIG_AMD_NUMA) += amdtopology_64.o
obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o
obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o
/*
- * AMD K8 NUMA support.
+ * AMD NUMA support.
* Discover the memory map and associated nodes.
*
- * This version reads it directly from the K8 northbridge.
+ * This version reads it directly from the AMD northbridge.
*
* Copyright 2002,2003 Andi Kleen, SuSE Labs.
*/
{
/*
* need to get the APIC ID of the BSP so can use that to
- * create apicid_to_node in k8_scan_nodes()
+ * create apicid_to_node in amd_scan_nodes()
*/
#ifdef CONFIG_X86_MPPARSE
/*
early_init_lapic_mapping();
}
-int __init k8_get_nodes(struct bootnode *physnodes)
+int __init amd_get_nodes(struct bootnode *physnodes)
{
int i;
int ret = 0;
return ret;
}
-int __init k8_numa_init(unsigned long start_pfn, unsigned long end_pfn)
+int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
{
unsigned long start = PFN_PHYS(start_pfn);
unsigned long end = PFN_PHYS(end_pfn);
return 0;
}
-int __init k8_scan_nodes(void)
+int __init amd_scan_nodes(void)
{
unsigned int bits;
unsigned int cores;
/*
* We just marked the kernel text read only above, now that
* we are going to free part of that, we need to make that
- * writeable first.
+ * writeable and non-executable first.
*/
+ set_memory_nx(begin, (end - begin) >> PAGE_SHIFT);
set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
static inline int is_kernel_text(unsigned long addr)
{
- if (addr >= PAGE_OFFSET && addr <= (unsigned long)__init_end)
+ if (addr >= (unsigned long)_text && addr <= (unsigned long)__init_end)
return 1;
return 0;
}
set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
}
+static void mark_nxdata_nx(void)
+{
+ /*
+ * When this called, init has already been executed and released,
+ * so everything past _etext sould be NX.
+ */
+ unsigned long start = PFN_ALIGN(_etext);
+ /*
+ * This comes from is_kernel_text upper limit. Also HPAGE where used:
+ */
+ unsigned long size = (((unsigned long)__init_end + HPAGE_SIZE) & HPAGE_MASK) - start;
+
+ if (__supported_pte_mask & _PAGE_NX)
+ printk(KERN_INFO "NX-protecting the kernel data: %luk\n", size >> 10);
+ set_pages_nx(virt_to_page(start), size >> PAGE_SHIFT);
+}
+
void mark_rodata_ro(void)
{
unsigned long start = PFN_ALIGN(_text);
printk(KERN_INFO "Testing CPA: write protecting again\n");
set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
#endif
+ mark_nxdata_nx();
}
#endif
static char *cmdline __initdata;
static int __init setup_physnodes(unsigned long start, unsigned long end,
- int acpi, int k8)
+ int acpi, int amd)
{
int nr_nodes = 0;
int ret = 0;
if (acpi)
nr_nodes = acpi_get_nodes(physnodes);
#endif
-#ifdef CONFIG_K8_NUMA
- if (k8)
- nr_nodes = k8_get_nodes(physnodes);
+#ifdef CONFIG_AMD_NUMA
+ if (amd)
+ nr_nodes = amd_get_nodes(physnodes);
#endif
/*
* Basic sanity checking on the physical node map: there may be errors
- * if the SRAT or K8 incorrectly reported the topology or the mem=
+ * if the SRAT or AMD code incorrectly reported the topology or the mem=
* kernel parameter is used.
*/
for (i = 0; i < nr_nodes; i++) {
* numa=fake command-line option.
*/
static int __init numa_emulation(unsigned long start_pfn,
- unsigned long last_pfn, int acpi, int k8)
+ unsigned long last_pfn, int acpi, int amd)
{
u64 addr = start_pfn << PAGE_SHIFT;
u64 max_addr = last_pfn << PAGE_SHIFT;
int num_nodes;
int i;
- num_phys_nodes = setup_physnodes(addr, max_addr, acpi, k8);
+ num_phys_nodes = setup_physnodes(addr, max_addr, acpi, amd);
/*
* If the numa=fake command-line contains a 'M' or 'G', it represents
* the fixed node size. Otherwise, if it is just a single number N,
#endif /* CONFIG_NUMA_EMU */
void __init initmem_init(unsigned long start_pfn, unsigned long last_pfn,
- int acpi, int k8)
+ int acpi, int amd)
{
int i;
nodes_clear(node_online_map);
#ifdef CONFIG_NUMA_EMU
- if (cmdline && !numa_emulation(start_pfn, last_pfn, acpi, k8))
+ if (cmdline && !numa_emulation(start_pfn, last_pfn, acpi, amd))
return;
nodes_clear(node_possible_map);
nodes_clear(node_online_map);
nodes_clear(node_online_map);
#endif
-#ifdef CONFIG_K8_NUMA
- if (!numa_off && k8 && !k8_scan_nodes())
+#ifdef CONFIG_AMD_NUMA
+ if (!numa_off && amd && !amd_scan_nodes())
return;
nodes_clear(node_possible_map);
nodes_clear(node_online_map);
#include <linux/pfn.h>
#include <linux/percpu.h>
#include <linux/gfp.h>
+#include <linux/pci.h>
#include <asm/e820.h>
#include <asm/processor.h>
unsigned long pfn)
{
pgprot_t forbidden = __pgprot(0);
+ pgprot_t required = __pgprot(0);
/*
* The BIOS area between 640k and 1Mb needs to be executable for
* PCI BIOS based config access (CONFIG_PCI_GOBIOS) support.
*/
- if (within(pfn, BIOS_BEGIN >> PAGE_SHIFT, BIOS_END >> PAGE_SHIFT))
+#ifdef CONFIG_PCI_BIOS
+ if (pcibios_enabled && within(pfn, BIOS_BEGIN >> PAGE_SHIFT, BIOS_END >> PAGE_SHIFT))
pgprot_val(forbidden) |= _PAGE_NX;
+#endif
/*
* The kernel text needs to be executable for obvious reasons
if (within(pfn, __pa((unsigned long)__start_rodata) >> PAGE_SHIFT,
__pa((unsigned long)__end_rodata) >> PAGE_SHIFT))
pgprot_val(forbidden) |= _PAGE_RW;
+ /*
+ * .data and .bss should always be writable.
+ */
+ if (within(address, (unsigned long)_sdata, (unsigned long)_edata) ||
+ within(address, (unsigned long)__bss_start, (unsigned long)__bss_stop))
+ pgprot_val(required) |= _PAGE_RW;
#if defined(CONFIG_X86_64) && defined(CONFIG_DEBUG_RODATA)
/*
#endif
prot = __pgprot(pgprot_val(prot) & ~pgprot_val(forbidden));
+ prot = __pgprot(pgprot_val(prot) | pgprot_val(required));
return prot;
}
{
unsigned long nextpage_addr, numpages, pmask, psize, flags, addr, pfn;
pte_t new_pte, old_pte, *tmp;
- pgprot_t old_prot, new_prot;
+ pgprot_t old_prot, new_prot, req_prot;
int i, do_split = 1;
unsigned int level;
* We are safe now. Check whether the new pgprot is the same:
*/
old_pte = *kpte;
- old_prot = new_prot = pte_pgprot(old_pte);
+ old_prot = new_prot = req_prot = pte_pgprot(old_pte);
- pgprot_val(new_prot) &= ~pgprot_val(cpa->mask_clr);
- pgprot_val(new_prot) |= pgprot_val(cpa->mask_set);
+ pgprot_val(req_prot) &= ~pgprot_val(cpa->mask_clr);
+ pgprot_val(req_prot) |= pgprot_val(cpa->mask_set);
/*
* old_pte points to the large page base address. So we need
pfn = pte_pfn(old_pte) + ((address & (psize - 1)) >> PAGE_SHIFT);
cpa->pfn = pfn;
- new_prot = static_protections(new_prot, address, pfn);
+ new_prot = static_protections(req_prot, address, pfn);
/*
* We need to check the full range, whether
* static_protection() requires a different pgprot for one of
* the pages in the range we try to preserve:
*/
- addr = address + PAGE_SIZE;
- pfn++;
- for (i = 1; i < cpa->numpages; i++, addr += PAGE_SIZE, pfn++) {
- pgprot_t chk_prot = static_protections(new_prot, addr, pfn);
+ addr = address & pmask;
+ pfn = pte_pfn(old_pte);
+ for (i = 0; i < (psize >> PAGE_SHIFT); i++, addr += PAGE_SIZE, pfn++) {
+ pgprot_t chk_prot = static_protections(req_prot, addr, pfn);
if (pgprot_val(chk_prot) != pgprot_val(new_prot))
goto out_unlock;
* that we limited the number of possible pages already to
* the number of pages in the large page.
*/
- if (address == (nextpage_addr - psize) && cpa->numpages == numpages) {
+ if (address == (address & pmask) && cpa->numpages == (psize >> PAGE_SHIFT)) {
/*
* The address is aligned and the number of pages
* covers the full page.
{
if (!cpu_has_nx) {
printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
- "missing in CPU or disabled in BIOS!\n");
+ "missing in CPU!\n");
} else {
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
if (disable_nx) {
/* mark this node as "seen" in node bitmap */
BMAP_SET(pxm_bitmap, cpu_affinity->proximity_domain_lo);
+ /* don't need to check apic_id here, because it is always 8 bits */
apicid_to_pxm[cpu_affinity->apic_id] = cpu_affinity->proximity_domain_lo;
printk(KERN_DEBUG "CPU %02x in proximity domain %02x\n",
}
apic_id = pa->apic_id;
+ if (apic_id >= MAX_LOCAL_APIC) {
+ printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
+ return;
+ }
apicid_to_node[apic_id] = node;
node_set(node, cpu_nodes_parsed);
acpi_numa = 1;
apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
else
apic_id = pa->apic_id;
+
+ if (apic_id >= MAX_LOCAL_APIC) {
+ printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
+ return;
+ }
+
apicid_to_node[apic_id] = node;
node_set(node, cpu_nodes_parsed);
acpi_numa = 1;
ret = setup_ibs_ctl(i);
if (ret)
return ret;
+ pr_err(FW_BUG "using offset %d for IBS interrupts\n", i);
return 0;
}
obj-$(CONFIG_PCI_XEN) += xen.o
obj-y += fixup.o
+obj-$(CONFIG_X86_INTEL_CE) += ce4100.o
obj-$(CONFIG_ACPI) += acpi.o
obj-y += legacy.o irq.o
--- /dev/null
+/*
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2010 Intel Corporation. All rights reserved.
+ *
+ * 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.
+ *
+ * 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 St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ * Intel Corporation
+ * 2200 Mission College Blvd.
+ * Santa Clara, CA 97052
+ *
+ * This provides access methods for PCI registers that mis-behave on
+ * the CE4100. Each register can be assigned a private init, read and
+ * write routine. The exception to this is the bridge device. The
+ * bridge device is the only device on bus zero (0) that requires any
+ * fixup so it is a special case ATM
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include <asm/pci_x86.h>
+
+struct sim_reg {
+ u32 value;
+ u32 mask;
+};
+
+struct sim_dev_reg {
+ int dev_func;
+ int reg;
+ void (*init)(struct sim_dev_reg *reg);
+ void (*read)(struct sim_dev_reg *reg, u32 *value);
+ void (*write)(struct sim_dev_reg *reg, u32 value);
+ struct sim_reg sim_reg;
+};
+
+struct sim_reg_op {
+ void (*init)(struct sim_dev_reg *reg);
+ void (*read)(struct sim_dev_reg *reg, u32 value);
+ void (*write)(struct sim_dev_reg *reg, u32 value);
+};
+
+#define MB (1024 * 1024)
+#define KB (1024)
+#define SIZE_TO_MASK(size) (~(size - 1))
+
+#define DEFINE_REG(device, func, offset, size, init_op, read_op, write_op)\
+{ PCI_DEVFN(device, func), offset, init_op, read_op, write_op,\
+ {0, SIZE_TO_MASK(size)} },
+
+static void reg_init(struct sim_dev_reg *reg)
+{
+ pci_direct_conf1.read(0, 1, reg->dev_func, reg->reg, 4,
+ ®->sim_reg.value);
+}
+
+static void reg_read(struct sim_dev_reg *reg, u32 *value)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&pci_config_lock, flags);
+ *value = reg->sim_reg.value;
+ raw_spin_unlock_irqrestore(&pci_config_lock, flags);
+}
+
+static void reg_write(struct sim_dev_reg *reg, u32 value)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&pci_config_lock, flags);
+ reg->sim_reg.value = (value & reg->sim_reg.mask) |
+ (reg->sim_reg.value & ~reg->sim_reg.mask);
+ raw_spin_unlock_irqrestore(&pci_config_lock, flags);
+}
+
+static void sata_reg_init(struct sim_dev_reg *reg)
+{
+ pci_direct_conf1.read(0, 1, PCI_DEVFN(14, 0), 0x10, 4,
+ ®->sim_reg.value);
+ reg->sim_reg.value += 0x400;
+}
+
+static void ehci_reg_read(struct sim_dev_reg *reg, u32 *value)
+{
+ reg_read(reg, value);
+ if (*value != reg->sim_reg.mask)
+ *value |= 0x100;
+}
+
+void sata_revid_init(struct sim_dev_reg *reg)
+{
+ reg->sim_reg.value = 0x01060100;
+ reg->sim_reg.mask = 0;
+}
+
+static void sata_revid_read(struct sim_dev_reg *reg, u32 *value)
+{
+ reg_read(reg, value);
+}
+
+static struct sim_dev_reg bus1_fixups[] = {
+ DEFINE_REG(2, 0, 0x10, (16*MB), reg_init, reg_read, reg_write)
+ DEFINE_REG(2, 0, 0x14, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(2, 1, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(3, 0, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(4, 0, 0x10, (128*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(4, 1, 0x10, (128*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(6, 0, 0x10, (512*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(6, 1, 0x10, (512*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(6, 2, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(8, 0, 0x10, (1*MB), reg_init, reg_read, reg_write)
+ DEFINE_REG(8, 1, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(8, 2, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(9, 0, 0x10 , (1*MB), reg_init, reg_read, reg_write)
+ DEFINE_REG(9, 0, 0x14, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(10, 0, 0x10, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(10, 0, 0x14, (256*MB), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 0, 0x10, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 0, 0x14, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 1, 0x10, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 2, 0x10, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 2, 0x14, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 2, 0x18, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 3, 0x10, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 3, 0x14, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 4, 0x10, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 5, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 6, 0x10, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(11, 7, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(12, 0, 0x10, (128*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(12, 0, 0x14, (256), reg_init, reg_read, reg_write)
+ DEFINE_REG(12, 1, 0x10, (1024), reg_init, reg_read, reg_write)
+ DEFINE_REG(13, 0, 0x10, (32*KB), reg_init, ehci_reg_read, reg_write)
+ DEFINE_REG(13, 1, 0x10, (32*KB), reg_init, ehci_reg_read, reg_write)
+ DEFINE_REG(14, 0, 0x8, 0, sata_revid_init, sata_revid_read, 0)
+ DEFINE_REG(14, 0, 0x10, 0, reg_init, reg_read, reg_write)
+ DEFINE_REG(14, 0, 0x14, 0, reg_init, reg_read, reg_write)
+ DEFINE_REG(14, 0, 0x18, 0, reg_init, reg_read, reg_write)
+ DEFINE_REG(14, 0, 0x1C, 0, reg_init, reg_read, reg_write)
+ DEFINE_REG(14, 0, 0x20, 0, reg_init, reg_read, reg_write)
+ DEFINE_REG(14, 0, 0x24, (0x200), sata_reg_init, reg_read, reg_write)
+ DEFINE_REG(15, 0, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(15, 0, 0x14, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(16, 0, 0x10, (64*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(16, 0, 0x14, (64*MB), reg_init, reg_read, reg_write)
+ DEFINE_REG(16, 0, 0x18, (64*MB), reg_init, reg_read, reg_write)
+ DEFINE_REG(17, 0, 0x10, (128*KB), reg_init, reg_read, reg_write)
+ DEFINE_REG(18, 0, 0x10, (1*KB), reg_init, reg_read, reg_write)
+};
+
+static void __init init_sim_regs(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bus1_fixups); i++) {
+ if (bus1_fixups[i].init)
+ bus1_fixups[i].init(&bus1_fixups[i]);
+ }
+}
+
+static inline void extract_bytes(u32 *value, int reg, int len)
+{
+ uint32_t mask;
+
+ *value >>= ((reg & 3) * 8);
+ mask = 0xFFFFFFFF >> ((4 - len) * 8);
+ *value &= mask;
+}
+
+int bridge_read(unsigned int devfn, int reg, int len, u32 *value)
+{
+ u32 av_bridge_base, av_bridge_limit;
+ int retval = 0;
+
+ switch (reg) {
+ /* Make BARs appear to not request any memory. */
+ case PCI_BASE_ADDRESS_0:
+ case PCI_BASE_ADDRESS_0 + 1:
+ case PCI_BASE_ADDRESS_0 + 2:
+ case PCI_BASE_ADDRESS_0 + 3:
+ *value = 0;
+ break;
+
+ /* Since subordinate bus number register is hardwired
+ * to zero and read only, so do the simulation.
+ */
+ case PCI_PRIMARY_BUS:
+ if (len == 4)
+ *value = 0x00010100;
+ break;
+
+ case PCI_SUBORDINATE_BUS:
+ *value = 1;
+ break;
+
+ case PCI_MEMORY_BASE:
+ case PCI_MEMORY_LIMIT:
+ /* Get the A/V bridge base address. */
+ pci_direct_conf1.read(0, 0, devfn,
+ PCI_BASE_ADDRESS_0, 4, &av_bridge_base);
+
+ av_bridge_limit = av_bridge_base + (512*MB - 1);
+ av_bridge_limit >>= 16;
+ av_bridge_limit &= 0xFFF0;
+
+ av_bridge_base >>= 16;
+ av_bridge_base &= 0xFFF0;
+
+ if (reg == PCI_MEMORY_LIMIT)
+ *value = av_bridge_limit;
+ else if (len == 2)
+ *value = av_bridge_base;
+ else
+ *value = (av_bridge_limit << 16) | av_bridge_base;
+ break;
+ /* Make prefetchable memory limit smaller than prefetchable
+ * memory base, so not claim prefetchable memory space.
+ */
+ case PCI_PREF_MEMORY_BASE:
+ *value = 0xFFF0;
+ break;
+ case PCI_PREF_MEMORY_LIMIT:
+ *value = 0x0;
+ break;
+ /* Make IO limit smaller than IO base, so not claim IO space. */
+ case PCI_IO_BASE:
+ *value = 0xF0;
+ break;
+ case PCI_IO_LIMIT:
+ *value = 0;
+ break;
+ default:
+ retval = 1;
+ }
+ return retval;
+}
+
+static int ce4100_conf_read(unsigned int seg, unsigned int bus,
+ unsigned int devfn, int reg, int len, u32 *value)
+{
+ int i, retval = 1;
+
+ if (bus == 1) {
+ for (i = 0; i < ARRAY_SIZE(bus1_fixups); i++) {
+ if (bus1_fixups[i].dev_func == devfn &&
+ bus1_fixups[i].reg == (reg & ~3) &&
+ bus1_fixups[i].read) {
+ bus1_fixups[i].read(&(bus1_fixups[i]),
+ value);
+ extract_bytes(value, reg, len);
+ return 0;
+ }
+ }
+ }
+
+ if (bus == 0 && (PCI_DEVFN(1, 0) == devfn) &&
+ !bridge_read(devfn, reg, len, value))
+ return 0;
+
+ return pci_direct_conf1.read(seg, bus, devfn, reg, len, value);
+}
+
+static int ce4100_conf_write(unsigned int seg, unsigned int bus,
+ unsigned int devfn, int reg, int len, u32 value)
+{
+ int i;
+
+ if (bus == 1) {
+ for (i = 0; i < ARRAY_SIZE(bus1_fixups); i++) {
+ if (bus1_fixups[i].dev_func == devfn &&
+ bus1_fixups[i].reg == (reg & ~3) &&
+ bus1_fixups[i].write) {
+ bus1_fixups[i].write(&(bus1_fixups[i]),
+ value);
+ return 0;
+ }
+ }
+ }
+
+ /* Discard writes to A/V bridge BAR. */
+ if (bus == 0 && PCI_DEVFN(1, 0) == devfn &&
+ ((reg & ~3) == PCI_BASE_ADDRESS_0))
+ return 0;
+
+ return pci_direct_conf1.write(seg, bus, devfn, reg, len, value);
+}
+
+struct pci_raw_ops ce4100_pci_conf = {
+ .read = ce4100_conf_read,
+ .write = ce4100_conf_write,
+};
+
+static int __init ce4100_pci_init(void)
+{
+ init_sim_regs();
+ raw_pci_ops = &ce4100_pci_conf;
+ return 0;
+}
+subsys_initcall(ce4100_pci_init);
#include <linux/uaccess.h>
#include <asm/pci_x86.h>
#include <asm/pci-functions.h>
+#include <asm/cacheflush.h>
/* BIOS32 signature: "_32_" */
#define BIOS32_SIGNATURE (('_' << 0) + ('3' << 8) + ('2' << 16) + ('_' << 24))
#define PCIBIOS_HW_TYPE1_SPEC 0x10
#define PCIBIOS_HW_TYPE2_SPEC 0x20
+int pcibios_enabled;
+
+/* According to the BIOS specification at:
+ * http://members.datafast.net.au/dft0802/specs/bios21.pdf, we could
+ * restrict the x zone to some pages and make it ro. But this may be
+ * broken on some bios, complex to handle with static_protections.
+ * We could make the 0xe0000-0x100000 range rox, but this can break
+ * some ISA mapping.
+ *
+ * So we let's an rw and x hole when pcibios is used. This shouldn't
+ * happen for modern system with mmconfig, and if you don't want it
+ * you could disable pcibios...
+ */
+static inline void set_bios_x(void)
+{
+ pcibios_enabled = 1;
+ set_memory_x(PAGE_OFFSET + BIOS_BEGIN, (BIOS_END - BIOS_BEGIN) >> PAGE_SHIFT);
+ if (__supported_pte_mask & _PAGE_NX)
+ printk(KERN_INFO "PCI : PCI BIOS aera is rw and x. Use pci=nobios if you want it NX.\n");
+}
+
/*
* This is the standard structure used to identify the entry point
* to the BIOS32 Service Directory, as documented in
DBG("PCI: BIOS32 Service Directory entry at 0x%lx\n",
bios32_entry);
bios32_indirect.address = bios32_entry + PAGE_OFFSET;
+ set_bios_x();
if (check_pcibios())
return &pci_bios_access;
}
# Platform specific code goes here
+obj-y += ce4100/
obj-y += efi/
+obj-y += iris/
obj-y += mrst/
obj-y += olpc/
obj-y += scx200/
--- /dev/null
+obj-$(CONFIG_X86_INTEL_CE) += ce4100.o
--- /dev/null
+/*
+ * Intel CE4100 platform specific setup code
+ *
+ * (C) Copyright 2010 Intel 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; version 2
+ * of the License.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/serial_reg.h>
+#include <linux/serial_8250.h>
+
+#include <asm/setup.h>
+#include <asm/io.h>
+
+static int ce4100_i8042_detect(void)
+{
+ return 0;
+}
+
+static void __init sdv_find_smp_config(void)
+{
+}
+
+#ifdef CONFIG_SERIAL_8250
+
+
+static unsigned int mem_serial_in(struct uart_port *p, int offset)
+{
+ offset = offset << p->regshift;
+ return readl(p->membase + offset);
+}
+
+/*
+ * The UART Tx interrupts are not set under some conditions and therefore serial
+ * transmission hangs. This is a silicon issue and has not been root caused. The
+ * workaround for this silicon issue checks UART_LSR_THRE bit and UART_LSR_TEMT
+ * bit of LSR register in interrupt handler to see whether at least one of these
+ * two bits is set, if so then process the transmit request. If this workaround
+ * is not applied, then the serial transmission may hang. This workaround is for
+ * errata number 9 in Errata - B step.
+*/
+
+static unsigned int ce4100_mem_serial_in(struct uart_port *p, int offset)
+{
+ unsigned int ret, ier, lsr;
+
+ if (offset == UART_IIR) {
+ offset = offset << p->regshift;
+ ret = readl(p->membase + offset);
+ if (ret & UART_IIR_NO_INT) {
+ /* see if the TX interrupt should have really set */
+ ier = mem_serial_in(p, UART_IER);
+ /* see if the UART's XMIT interrupt is enabled */
+ if (ier & UART_IER_THRI) {
+ lsr = mem_serial_in(p, UART_LSR);
+ /* now check to see if the UART should be
+ generating an interrupt (but isn't) */
+ if (lsr & (UART_LSR_THRE | UART_LSR_TEMT))
+ ret &= ~UART_IIR_NO_INT;
+ }
+ }
+ } else
+ ret = mem_serial_in(p, offset);
+ return ret;
+}
+
+static void ce4100_mem_serial_out(struct uart_port *p, int offset, int value)
+{
+ offset = offset << p->regshift;
+ writel(value, p->membase + offset);
+}
+
+static void ce4100_serial_fixup(int port, struct uart_port *up,
+ unsigned short *capabilites)
+{
+#ifdef CONFIG_EARLY_PRINTK
+ /*
+ * Over ride the legacy port configuration that comes from
+ * asm/serial.h. Using the ioport driver then switching to the
+ * PCI memmaped driver hangs the IOAPIC
+ */
+ if (up->iotype != UPIO_MEM32) {
+ up->uartclk = 14745600;
+ up->mapbase = 0xdffe0200;
+ set_fixmap_nocache(FIX_EARLYCON_MEM_BASE,
+ up->mapbase & PAGE_MASK);
+ up->membase =
+ (void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE);
+ up->membase += up->mapbase & ~PAGE_MASK;
+ up->iotype = UPIO_MEM32;
+ up->regshift = 2;
+ }
+#endif
+ up->iobase = 0;
+ up->serial_in = ce4100_mem_serial_in;
+ up->serial_out = ce4100_mem_serial_out;
+
+ *capabilites |= (1 << 12);
+}
+
+static __init void sdv_serial_fixup(void)
+{
+ serial8250_set_isa_configurator(ce4100_serial_fixup);
+}
+
+#else
+static inline void sdv_serial_fixup(void);
+#endif
+
+static void __init sdv_arch_setup(void)
+{
+ sdv_serial_fixup();
+}
+
+/*
+ * CE4100 specific x86_init function overrides and early setup
+ * calls.
+ */
+void __init x86_ce4100_early_setup(void)
+{
+ x86_init.oem.arch_setup = sdv_arch_setup;
+ x86_platform.i8042_detect = ce4100_i8042_detect;
+ x86_init.resources.probe_roms = x86_init_noop;
+ x86_init.mpparse.get_smp_config = x86_init_uint_noop;
+ x86_init.mpparse.find_smp_config = sdv_find_smp_config;
+}
--- /dev/null
+obj-$(CONFIG_X86_32_IRIS) += iris.o
--- /dev/null
+/*
+ * Eurobraille/Iris power off support.
+ *
+ * Eurobraille's Iris machine is a PC with no APM or ACPI support.
+ * It is shutdown by a special I/O sequence which this module provides.
+ *
+ * Copyright (C) Shérab <Sebastien.Hinderer@ens-lyon.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 the program ; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/pm.h>
+#include <asm/io.h>
+
+#define IRIS_GIO_BASE 0x340
+#define IRIS_GIO_INPUT IRIS_GIO_BASE
+#define IRIS_GIO_OUTPUT (IRIS_GIO_BASE + 1)
+#define IRIS_GIO_PULSE 0x80 /* First byte to send */
+#define IRIS_GIO_REST 0x00 /* Second byte to send */
+#define IRIS_GIO_NODEV 0xff /* Likely not an Iris */
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>");
+MODULE_DESCRIPTION("A power_off handler for Iris devices from EuroBraille");
+MODULE_SUPPORTED_DEVICE("Eurobraille/Iris");
+
+static int force;
+
+module_param(force, bool, 0);
+MODULE_PARM_DESC(force, "Set to one to force poweroff handler installation.");
+
+static void (*old_pm_power_off)(void);
+
+static void iris_power_off(void)
+{
+ outb(IRIS_GIO_PULSE, IRIS_GIO_OUTPUT);
+ msleep(850);
+ outb(IRIS_GIO_REST, IRIS_GIO_OUTPUT);
+}
+
+/*
+ * Before installing the power_off handler, try to make sure the OS is
+ * running on an Iris. Since Iris does not support DMI, this is done
+ * by reading its input port and seeing whether the read value is
+ * meaningful.
+ */
+static int iris_init(void)
+{
+ unsigned char status;
+ if (force != 1) {
+ printk(KERN_ERR "The force parameter has not been set to 1 so the Iris poweroff handler will not be installed.\n");
+ return -ENODEV;
+ }
+ status = inb(IRIS_GIO_INPUT);
+ if (status == IRIS_GIO_NODEV) {
+ printk(KERN_ERR "This machine does not seem to be an Iris. Power_off handler not installed.\n");
+ return -ENODEV;
+ }
+ old_pm_power_off = pm_power_off;
+ pm_power_off = &iris_power_off;
+ printk(KERN_INFO "Iris power_off handler installed.\n");
+
+ return 0;
+}
+
+static void iris_exit(void)
+{
+ pm_power_off = old_pm_power_off;
+ printk(KERN_INFO "Iris power_off handler uninstalled.\n");
+}
+
+module_init(iris_init);
+module_exit(iris_exit);
obj-$(CONFIG_X86_MRST) += mrst.o
+obj-$(CONFIG_X86_MRST) += vrtc.o
+obj-$(CONFIG_EARLY_PRINTK_MRST) += early_printk_mrst.o
* as published by the Free Software Foundation; version 2
* of the License.
*/
+
+#define pr_fmt(fmt) "mrst: " fmt
+
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sfi.h>
+#include <linux/intel_pmic_gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/i2c.h>
+#include <linux/i2c/pca953x.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <asm/mrst.h>
#include <asm/io.h>
#include <asm/i8259.h>
+#include <asm/intel_scu_ipc.h>
#include <asm/apb_timer.h>
+#include <asm/reboot.h>
/*
* the clockevent devices on Moorestown/Medfield can be APBT or LAPIC clock,
memcpy(sfi_mtimer_array, pentry, totallen);
}
- printk(KERN_INFO "SFI: MTIMER info (num = %d):\n", sfi_mtimer_num);
+ pr_debug("SFI MTIMER info (num = %d):\n", sfi_mtimer_num);
pentry = sfi_mtimer_array;
for (totallen = 0; totallen < sfi_mtimer_num; totallen++, pentry++) {
- printk(KERN_INFO "timer[%d]: paddr = 0x%08x, freq = %dHz,"
+ pr_debug("timer[%d]: paddr = 0x%08x, freq = %dHz,"
" irq = %d\n", totallen, (u32)pentry->phys_addr,
pentry->freq_hz, pentry->irq);
if (!pentry->irq)
memcpy(sfi_mrtc_array, pentry, totallen);
}
- printk(KERN_INFO "SFI: RTC info (num = %d):\n", sfi_mrtc_num);
+ pr_debug("SFI RTC info (num = %d):\n", sfi_mrtc_num);
pentry = sfi_mrtc_array;
for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) {
- printk(KERN_INFO "RTC[%d]: paddr = 0x%08x, irq = %d\n",
+ pr_debug("RTC[%d]: paddr = 0x%08x, irq = %d\n",
totallen, (u32)pentry->phys_addr, pentry->irq);
mp_irq.type = MP_IOAPIC;
mp_irq.irqtype = mp_INT;
- mp_irq.irqflag = 0;
+ mp_irq.irqflag = 0xf; /* level trigger and active low */
mp_irq.srcbus = 0;
mp_irq.srcbusirq = pentry->irq; /* IRQ */
mp_irq.dstapic = MP_APIC_ALL;
void __init mrst_time_init(void)
{
+ sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
switch (mrst_timer_options) {
case MRST_TIMER_APBT_ONLY:
break;
return;
}
/* we need at least one APB timer */
- sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
pre_init_apic_IRQ0();
apbt_time_init();
}
-void __init mrst_rtc_init(void)
-{
- sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);
-}
-
void __cpuinit mrst_arch_setup(void)
{
if (boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 0x27)
return 0;
}
+/* Reboot and power off are handled by the SCU on a MID device */
+static void mrst_power_off(void)
+{
+ intel_scu_ipc_simple_command(0xf1, 1);
+}
+
+static void mrst_reboot(void)
+{
+ intel_scu_ipc_simple_command(0xf1, 0);
+}
+
/*
* Moorestown specific x86_init function overrides and early setup
* calls.
legacy_pic = &null_legacy_pic;
+ /* Moorestown specific power_off/restart method */
+ pm_power_off = mrst_power_off;
+ machine_ops.emergency_restart = mrst_reboot;
+
/* Avoid searching for BIOS MP tables */
x86_init.mpparse.find_smp_config = x86_init_noop;
x86_init.mpparse.get_smp_config = x86_init_uint_noop;
return 0;
}
__setup("x86_mrst_timer=", setup_x86_mrst_timer);
+
+/*
+ * Parsing GPIO table first, since the DEVS table will need this table
+ * to map the pin name to the actual pin.
+ */
+static struct sfi_gpio_table_entry *gpio_table;
+static int gpio_num_entry;
+
+static int __init sfi_parse_gpio(struct sfi_table_header *table)
+{
+ struct sfi_table_simple *sb;
+ struct sfi_gpio_table_entry *pentry;
+ int num, i;
+
+ if (gpio_table)
+ return 0;
+ sb = (struct sfi_table_simple *)table;
+ num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry);
+ pentry = (struct sfi_gpio_table_entry *)sb->pentry;
+
+ gpio_table = (struct sfi_gpio_table_entry *)
+ kmalloc(num * sizeof(*pentry), GFP_KERNEL);
+ if (!gpio_table)
+ return -1;
+ memcpy(gpio_table, pentry, num * sizeof(*pentry));
+ gpio_num_entry = num;
+
+ pr_debug("GPIO pin info:\n");
+ for (i = 0; i < num; i++, pentry++)
+ pr_debug("info[%2d]: controller = %16.16s, pin_name = %16.16s,"
+ " pin = %d\n", i,
+ pentry->controller_name,
+ pentry->pin_name,
+ pentry->pin_no);
+ return 0;
+}
+
+static int get_gpio_by_name(const char *name)
+{
+ struct sfi_gpio_table_entry *pentry = gpio_table;
+ int i;
+
+ if (!pentry)
+ return -1;
+ for (i = 0; i < gpio_num_entry; i++, pentry++) {
+ if (!strncmp(name, pentry->pin_name, SFI_NAME_LEN))
+ return pentry->pin_no;
+ }
+ return -1;
+}
+
+/*
+ * Here defines the array of devices platform data that IAFW would export
+ * through SFI "DEVS" table, we use name and type to match the device and
+ * its platform data.
+ */
+struct devs_id {
+ char name[SFI_NAME_LEN + 1];
+ u8 type;
+ u8 delay;
+ void *(*get_platform_data)(void *info);
+};
+
+/* the offset for the mapping of global gpio pin to irq */
+#define MRST_IRQ_OFFSET 0x100
+
+static void __init *pmic_gpio_platform_data(void *info)
+{
+ static struct intel_pmic_gpio_platform_data pmic_gpio_pdata;
+ int gpio_base = get_gpio_by_name("pmic_gpio_base");
+
+ if (gpio_base == -1)
+ gpio_base = 64;
+ pmic_gpio_pdata.gpio_base = gpio_base;
+ pmic_gpio_pdata.irq_base = gpio_base + MRST_IRQ_OFFSET;
+ pmic_gpio_pdata.gpiointr = 0xffffeff8;
+
+ return &pmic_gpio_pdata;
+}
+
+static void __init *max3111_platform_data(void *info)
+{
+ struct spi_board_info *spi_info = info;
+ int intr = get_gpio_by_name("max3111_int");
+
+ if (intr == -1)
+ return NULL;
+ spi_info->irq = intr + MRST_IRQ_OFFSET;
+ return NULL;
+}
+
+/* we have multiple max7315 on the board ... */
+#define MAX7315_NUM 2
+static void __init *max7315_platform_data(void *info)
+{
+ static struct pca953x_platform_data max7315_pdata[MAX7315_NUM];
+ static int nr;
+ struct pca953x_platform_data *max7315 = &max7315_pdata[nr];
+ struct i2c_board_info *i2c_info = info;
+ int gpio_base, intr;
+ char base_pin_name[SFI_NAME_LEN + 1];
+ char intr_pin_name[SFI_NAME_LEN + 1];
+
+ if (nr == MAX7315_NUM) {
+ pr_err("too many max7315s, we only support %d\n",
+ MAX7315_NUM);
+ return NULL;
+ }
+ /* we have several max7315 on the board, we only need load several
+ * instances of the same pca953x driver to cover them
+ */
+ strcpy(i2c_info->type, "max7315");
+ if (nr++) {
+ sprintf(base_pin_name, "max7315_%d_base", nr);
+ sprintf(intr_pin_name, "max7315_%d_int", nr);
+ } else {
+ strcpy(base_pin_name, "max7315_base");
+ strcpy(intr_pin_name, "max7315_int");
+ }
+
+ gpio_base = get_gpio_by_name(base_pin_name);
+ intr = get_gpio_by_name(intr_pin_name);
+
+ if (gpio_base == -1)
+ return NULL;
+ max7315->gpio_base = gpio_base;
+ if (intr != -1) {
+ i2c_info->irq = intr + MRST_IRQ_OFFSET;
+ max7315->irq_base = gpio_base + MRST_IRQ_OFFSET;
+ } else {
+ i2c_info->irq = -1;
+ max7315->irq_base = -1;
+ }
+ return max7315;
+}
+
+static void __init *emc1403_platform_data(void *info)
+{
+ static short intr2nd_pdata;
+ struct i2c_board_info *i2c_info = info;
+ int intr = get_gpio_by_name("thermal_int");
+ int intr2nd = get_gpio_by_name("thermal_alert");
+
+ if (intr == -1 || intr2nd == -1)
+ return NULL;
+
+ i2c_info->irq = intr + MRST_IRQ_OFFSET;
+ intr2nd_pdata = intr2nd + MRST_IRQ_OFFSET;
+
+ return &intr2nd_pdata;
+}
+
+static void __init *lis331dl_platform_data(void *info)
+{
+ static short intr2nd_pdata;
+ struct i2c_board_info *i2c_info = info;
+ int intr = get_gpio_by_name("accel_int");
+ int intr2nd = get_gpio_by_name("accel_2");
+
+ if (intr == -1 || intr2nd == -1)
+ return NULL;
+
+ i2c_info->irq = intr + MRST_IRQ_OFFSET;
+ intr2nd_pdata = intr2nd + MRST_IRQ_OFFSET;
+
+ return &intr2nd_pdata;
+}
+
+static void __init *no_platform_data(void *info)
+{
+ return NULL;
+}
+
+static const struct devs_id __initconst device_ids[] = {
+ {"pmic_gpio", SFI_DEV_TYPE_SPI, 1, &pmic_gpio_platform_data},
+ {"spi_max3111", SFI_DEV_TYPE_SPI, 0, &max3111_platform_data},
+ {"i2c_max7315", SFI_DEV_TYPE_I2C, 1, &max7315_platform_data},
+ {"i2c_max7315_2", SFI_DEV_TYPE_I2C, 1, &max7315_platform_data},
+ {"emc1403", SFI_DEV_TYPE_I2C, 1, &emc1403_platform_data},
+ {"i2c_accel", SFI_DEV_TYPE_I2C, 0, &lis331dl_platform_data},
+ {"pmic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
+ {"msic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
+ {},
+};
+
+#define MAX_IPCDEVS 24
+static struct platform_device *ipc_devs[MAX_IPCDEVS];
+static int ipc_next_dev;
+
+#define MAX_SCU_SPI 24
+static struct spi_board_info *spi_devs[MAX_SCU_SPI];
+static int spi_next_dev;
+
+#define MAX_SCU_I2C 24
+static struct i2c_board_info *i2c_devs[MAX_SCU_I2C];
+static int i2c_bus[MAX_SCU_I2C];
+static int i2c_next_dev;
+
+static void __init intel_scu_device_register(struct platform_device *pdev)
+{
+ if(ipc_next_dev == MAX_IPCDEVS)
+ pr_err("too many SCU IPC devices");
+ else
+ ipc_devs[ipc_next_dev++] = pdev;
+}
+
+static void __init intel_scu_spi_device_register(struct spi_board_info *sdev)
+{
+ struct spi_board_info *new_dev;
+
+ if (spi_next_dev == MAX_SCU_SPI) {
+ pr_err("too many SCU SPI devices");
+ return;
+ }
+
+ new_dev = kzalloc(sizeof(*sdev), GFP_KERNEL);
+ if (!new_dev) {
+ pr_err("failed to alloc mem for delayed spi dev %s\n",
+ sdev->modalias);
+ return;
+ }
+ memcpy(new_dev, sdev, sizeof(*sdev));
+
+ spi_devs[spi_next_dev++] = new_dev;
+}
+
+static void __init intel_scu_i2c_device_register(int bus,
+ struct i2c_board_info *idev)
+{
+ struct i2c_board_info *new_dev;
+
+ if (i2c_next_dev == MAX_SCU_I2C) {
+ pr_err("too many SCU I2C devices");
+ return;
+ }
+
+ new_dev = kzalloc(sizeof(*idev), GFP_KERNEL);
+ if (!new_dev) {
+ pr_err("failed to alloc mem for delayed i2c dev %s\n",
+ idev->type);
+ return;
+ }
+ memcpy(new_dev, idev, sizeof(*idev));
+
+ i2c_bus[i2c_next_dev] = bus;
+ i2c_devs[i2c_next_dev++] = new_dev;
+}
+
+/* Called by IPC driver */
+void intel_scu_devices_create(void)
+{
+ int i;
+
+ for (i = 0; i < ipc_next_dev; i++)
+ platform_device_add(ipc_devs[i]);
+
+ for (i = 0; i < spi_next_dev; i++)
+ spi_register_board_info(spi_devs[i], 1);
+
+ for (i = 0; i < i2c_next_dev; i++) {
+ struct i2c_adapter *adapter;
+ struct i2c_client *client;
+
+ adapter = i2c_get_adapter(i2c_bus[i]);
+ if (adapter) {
+ client = i2c_new_device(adapter, i2c_devs[i]);
+ if (!client)
+ pr_err("can't create i2c device %s\n",
+ i2c_devs[i]->type);
+ } else
+ i2c_register_board_info(i2c_bus[i], i2c_devs[i], 1);
+ }
+}
+EXPORT_SYMBOL_GPL(intel_scu_devices_create);
+
+/* Called by IPC driver */
+void intel_scu_devices_destroy(void)
+{
+ int i;
+
+ for (i = 0; i < ipc_next_dev; i++)
+ platform_device_del(ipc_devs[i]);
+}
+EXPORT_SYMBOL_GPL(intel_scu_devices_destroy);
+
+static void __init install_irq_resource(struct platform_device *pdev, int irq)
+{
+ /* Single threaded */
+ static struct resource __initdata res = {
+ .name = "IRQ",
+ .flags = IORESOURCE_IRQ,
+ };
+ res.start = irq;
+ platform_device_add_resources(pdev, &res, 1);
+}
+
+static void __init sfi_handle_ipc_dev(struct platform_device *pdev)
+{
+ const struct devs_id *dev = device_ids;
+ void *pdata = NULL;
+
+ while (dev->name[0]) {
+ if (dev->type == SFI_DEV_TYPE_IPC &&
+ !strncmp(dev->name, pdev->name, SFI_NAME_LEN)) {
+ pdata = dev->get_platform_data(pdev);
+ break;
+ }
+ dev++;
+ }
+ pdev->dev.platform_data = pdata;
+ intel_scu_device_register(pdev);
+}
+
+static void __init sfi_handle_spi_dev(struct spi_board_info *spi_info)
+{
+ const struct devs_id *dev = device_ids;
+ void *pdata = NULL;
+
+ while (dev->name[0]) {
+ if (dev->type == SFI_DEV_TYPE_SPI &&
+ !strncmp(dev->name, spi_info->modalias, SFI_NAME_LEN)) {
+ pdata = dev->get_platform_data(spi_info);
+ break;
+ }
+ dev++;
+ }
+ spi_info->platform_data = pdata;
+ if (dev->delay)
+ intel_scu_spi_device_register(spi_info);
+ else
+ spi_register_board_info(spi_info, 1);
+}
+
+static void __init sfi_handle_i2c_dev(int bus, struct i2c_board_info *i2c_info)
+{
+ const struct devs_id *dev = device_ids;
+ void *pdata = NULL;
+
+ while (dev->name[0]) {
+ if (dev->type == SFI_DEV_TYPE_I2C &&
+ !strncmp(dev->name, i2c_info->type, SFI_NAME_LEN)) {
+ pdata = dev->get_platform_data(i2c_info);
+ break;
+ }
+ dev++;
+ }
+ i2c_info->platform_data = pdata;
+
+ if (dev->delay)
+ intel_scu_i2c_device_register(bus, i2c_info);
+ else
+ i2c_register_board_info(bus, i2c_info, 1);
+ }
+
+
+static int __init sfi_parse_devs(struct sfi_table_header *table)
+{
+ struct sfi_table_simple *sb;
+ struct sfi_device_table_entry *pentry;
+ struct spi_board_info spi_info;
+ struct i2c_board_info i2c_info;
+ struct platform_device *pdev;
+ int num, i, bus;
+ int ioapic;
+ struct io_apic_irq_attr irq_attr;
+
+ sb = (struct sfi_table_simple *)table;
+ num = SFI_GET_NUM_ENTRIES(sb, struct sfi_device_table_entry);
+ pentry = (struct sfi_device_table_entry *)sb->pentry;
+
+ for (i = 0; i < num; i++, pentry++) {
+ if (pentry->irq != (u8)0xff) { /* native RTE case */
+ /* these SPI2 devices are not exposed to system as PCI
+ * devices, but they have separate RTE entry in IOAPIC
+ * so we have to enable them one by one here
+ */
+ ioapic = mp_find_ioapic(pentry->irq);
+ irq_attr.ioapic = ioapic;
+ irq_attr.ioapic_pin = pentry->irq;
+ irq_attr.trigger = 1;
+ irq_attr.polarity = 1;
+ io_apic_set_pci_routing(NULL, pentry->irq, &irq_attr);
+ }
+ switch (pentry->type) {
+ case SFI_DEV_TYPE_IPC:
+ /* ID as IRQ is a hack that will go away */
+ pdev = platform_device_alloc(pentry->name, pentry->irq);
+ if (pdev == NULL) {
+ pr_err("out of memory for SFI platform device '%s'.\n",
+ pentry->name);
+ continue;
+ }
+ install_irq_resource(pdev, pentry->irq);
+ pr_debug("info[%2d]: IPC bus, name = %16.16s, "
+ "irq = 0x%2x\n", i, pentry->name, pentry->irq);
+ sfi_handle_ipc_dev(pdev);
+ break;
+ case SFI_DEV_TYPE_SPI:
+ memset(&spi_info, 0, sizeof(spi_info));
+ strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN);
+ spi_info.irq = pentry->irq;
+ spi_info.bus_num = pentry->host_num;
+ spi_info.chip_select = pentry->addr;
+ spi_info.max_speed_hz = pentry->max_freq;
+ pr_debug("info[%2d]: SPI bus = %d, name = %16.16s, "
+ "irq = 0x%2x, max_freq = %d, cs = %d\n", i,
+ spi_info.bus_num,
+ spi_info.modalias,
+ spi_info.irq,
+ spi_info.max_speed_hz,
+ spi_info.chip_select);
+ sfi_handle_spi_dev(&spi_info);
+ break;
+ case SFI_DEV_TYPE_I2C:
+ memset(&i2c_info, 0, sizeof(i2c_info));
+ bus = pentry->host_num;
+ strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN);
+ i2c_info.irq = pentry->irq;
+ i2c_info.addr = pentry->addr;
+ pr_debug("info[%2d]: I2C bus = %d, name = %16.16s, "
+ "irq = 0x%2x, addr = 0x%x\n", i, bus,
+ i2c_info.type,
+ i2c_info.irq,
+ i2c_info.addr);
+ sfi_handle_i2c_dev(bus, &i2c_info);
+ break;
+ case SFI_DEV_TYPE_UART:
+ case SFI_DEV_TYPE_HSI:
+ default:
+ ;
+ }
+ }
+ return 0;
+}
+
+static int __init mrst_platform_init(void)
+{
+ sfi_table_parse(SFI_SIG_GPIO, NULL, NULL, sfi_parse_gpio);
+ sfi_table_parse(SFI_SIG_DEVS, NULL, NULL, sfi_parse_devs);
+ return 0;
+}
+arch_initcall(mrst_platform_init);
+
+/*
+ * we will search these buttons in SFI GPIO table (by name)
+ * and register them dynamically. Please add all possible
+ * buttons here, we will shrink them if no GPIO found.
+ */
+static struct gpio_keys_button gpio_button[] = {
+ {KEY_POWER, -1, 1, "power_btn", EV_KEY, 0, 3000},
+ {KEY_PROG1, -1, 1, "prog_btn1", EV_KEY, 0, 20},
+ {KEY_PROG2, -1, 1, "prog_btn2", EV_KEY, 0, 20},
+ {SW_LID, -1, 1, "lid_switch", EV_SW, 0, 20},
+ {KEY_VOLUMEUP, -1, 1, "vol_up", EV_KEY, 0, 20},
+ {KEY_VOLUMEDOWN, -1, 1, "vol_down", EV_KEY, 0, 20},
+ {KEY_CAMERA, -1, 1, "camera_full", EV_KEY, 0, 20},
+ {KEY_CAMERA_FOCUS, -1, 1, "camera_half", EV_KEY, 0, 20},
+ {SW_KEYPAD_SLIDE, -1, 1, "MagSw1", EV_SW, 0, 20},
+ {SW_KEYPAD_SLIDE, -1, 1, "MagSw2", EV_SW, 0, 20},
+};
+
+static struct gpio_keys_platform_data mrst_gpio_keys = {
+ .buttons = gpio_button,
+ .rep = 1,
+ .nbuttons = -1, /* will fill it after search */
+};
+
+static struct platform_device pb_device = {
+ .name = "gpio-keys",
+ .id = -1,
+ .dev = {
+ .platform_data = &mrst_gpio_keys,
+ },
+};
+
+/*
+ * Shrink the non-existent buttons, register the gpio button
+ * device if there is some
+ */
+static int __init pb_keys_init(void)
+{
+ struct gpio_keys_button *gb = gpio_button;
+ int i, num, good = 0;
+
+ num = sizeof(gpio_button) / sizeof(struct gpio_keys_button);
+ for (i = 0; i < num; i++) {
+ gb[i].gpio = get_gpio_by_name(gb[i].desc);
+ if (gb[i].gpio == -1)
+ continue;
+
+ if (i != good)
+ gb[good] = gb[i];
+ good++;
+ }
+
+ if (good) {
+ mrst_gpio_keys.nbuttons = good;
+ return platform_device_register(&pb_device);
+ }
+ return 0;
+}
+late_initcall(pb_keys_init);
--- /dev/null
+/*
+ * vrtc.c: Driver for virtual RTC device on Intel MID platform
+ *
+ * (C) Copyright 2009 Intel 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; version 2
+ * of the License.
+ *
+ * Note:
+ * VRTC is emulated by system controller firmware, the real HW
+ * RTC is located in the PMIC device. SCU FW shadows PMIC RTC
+ * in a memory mapped IO space that is visible to the host IA
+ * processor.
+ *
+ * This driver is based on RTC CMOS driver.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sfi.h>
+#include <linux/platform_device.h>
+
+#include <asm/mrst.h>
+#include <asm/mrst-vrtc.h>
+#include <asm/time.h>
+#include <asm/fixmap.h>
+
+static unsigned char __iomem *vrtc_virt_base;
+
+unsigned char vrtc_cmos_read(unsigned char reg)
+{
+ unsigned char retval;
+
+ /* vRTC's registers range from 0x0 to 0xD */
+ if (reg > 0xd || !vrtc_virt_base)
+ return 0xff;
+
+ lock_cmos_prefix(reg);
+ retval = __raw_readb(vrtc_virt_base + (reg << 2));
+ lock_cmos_suffix(reg);
+ return retval;
+}
+EXPORT_SYMBOL_GPL(vrtc_cmos_read);
+
+void vrtc_cmos_write(unsigned char val, unsigned char reg)
+{
+ if (reg > 0xd || !vrtc_virt_base)
+ return;
+
+ lock_cmos_prefix(reg);
+ __raw_writeb(val, vrtc_virt_base + (reg << 2));
+ lock_cmos_suffix(reg);
+}
+EXPORT_SYMBOL_GPL(vrtc_cmos_write);
+
+unsigned long vrtc_get_time(void)
+{
+ u8 sec, min, hour, mday, mon;
+ u32 year;
+
+ while ((vrtc_cmos_read(RTC_FREQ_SELECT) & RTC_UIP))
+ cpu_relax();
+
+ sec = vrtc_cmos_read(RTC_SECONDS);
+ min = vrtc_cmos_read(RTC_MINUTES);
+ hour = vrtc_cmos_read(RTC_HOURS);
+ mday = vrtc_cmos_read(RTC_DAY_OF_MONTH);
+ mon = vrtc_cmos_read(RTC_MONTH);
+ year = vrtc_cmos_read(RTC_YEAR);
+
+ /* vRTC YEAR reg contains the offset to 1960 */
+ year += 1960;
+
+ printk(KERN_INFO "vRTC: sec: %d min: %d hour: %d day: %d "
+ "mon: %d year: %d\n", sec, min, hour, mday, mon, year);
+
+ return mktime(year, mon, mday, hour, min, sec);
+}
+
+/* Only care about the minutes and seconds */
+int vrtc_set_mmss(unsigned long nowtime)
+{
+ int real_sec, real_min;
+ int vrtc_min;
+
+ vrtc_min = vrtc_cmos_read(RTC_MINUTES);
+
+ real_sec = nowtime % 60;
+ real_min = nowtime / 60;
+ if (((abs(real_min - vrtc_min) + 15)/30) & 1)
+ real_min += 30;
+ real_min %= 60;
+
+ vrtc_cmos_write(real_sec, RTC_SECONDS);
+ vrtc_cmos_write(real_min, RTC_MINUTES);
+ return 0;
+}
+
+void __init mrst_rtc_init(void)
+{
+ unsigned long rtc_paddr;
+ void __iomem *virt_base;
+
+ sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);
+ if (!sfi_mrtc_num)
+ return;
+
+ rtc_paddr = sfi_mrtc_array[0].phys_addr;
+
+ /* vRTC's register address may not be page aligned */
+ set_fixmap_nocache(FIX_LNW_VRTC, rtc_paddr);
+
+ virt_base = (void __iomem *)__fix_to_virt(FIX_LNW_VRTC);
+ virt_base += rtc_paddr & ~PAGE_MASK;
+ vrtc_virt_base = virt_base;
+
+ x86_platform.get_wallclock = vrtc_get_time;
+ x86_platform.set_wallclock = vrtc_set_mmss;
+}
+
+/*
+ * The Moorestown platform has a memory mapped virtual RTC device that emulates
+ * the programming interface of the RTC.
+ */
+
+static struct resource vrtc_resources[] = {
+ [0] = {
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static struct platform_device vrtc_device = {
+ .name = "rtc_mrst",
+ .id = -1,
+ .resource = vrtc_resources,
+ .num_resources = ARRAY_SIZE(vrtc_resources),
+};
+
+/* Register the RTC device if appropriate */
+static int __init mrst_device_create(void)
+{
+ /* No Moorestown, no device */
+ if (!mrst_identify_cpu())
+ return -ENODEV;
+ /* No timer, no device */
+ if (!sfi_mrtc_num)
+ return -ENODEV;
+
+ /* iomem resource */
+ vrtc_resources[0].start = sfi_mrtc_array[0].phys_addr;
+ vrtc_resources[0].end = sfi_mrtc_array[0].phys_addr +
+ MRST_VRTC_MAP_SZ;
+ /* irq resource */
+ vrtc_resources[1].start = sfi_mrtc_array[0].irq;
+ vrtc_resources[1].end = sfi_mrtc_array[0].irq;
+
+ return platform_device_register(&vrtc_device);
+}
+
+module_init(mrst_device_create);
/* All CPUs enumerated by SFI must be present and enabled */
static void __cpuinit mp_sfi_register_lapic(u8 id)
{
- if (MAX_APICS - id <= 0) {
+ if (MAX_LOCAL_APIC - id <= 0) {
pr_warning("Processor #%d invalid (max %d)\n",
- id, MAX_APICS);
+ id, MAX_LOCAL_APIC);
return;
}
/*
* 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 uvhub
+ * per cpu; and one per cpu on the uvhub (UV_ADP_SIZE)
*/
bau_desc = kmalloc_node(sizeof(struct bau_desc) * UV_ADP_SIZE
* UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node);
/*
* initialize the bau_control structure for each cpu
*/
-static void __init uv_init_per_cpu(int nuvhubs)
+static int __init uv_init_per_cpu(int nuvhubs)
{
int i;
int cpu;
struct bau_control *smaster = NULL;
struct socket_desc {
short num_cpus;
- short cpu_number[16];
+ short cpu_number[MAX_CPUS_PER_SOCKET];
};
struct uvhub_desc {
unsigned short socket_mask;
sdp = &bdp->socket[socket];
sdp->cpu_number[sdp->num_cpus] = cpu;
sdp->num_cpus++;
+ if (sdp->num_cpus > MAX_CPUS_PER_SOCKET) {
+ printk(KERN_EMERG "%d cpus per socket invalid\n", sdp->num_cpus);
+ return 1;
+ }
}
for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
if (!(*(uvhub_mask + (uvhub/8)) & (1 << (uvhub%8))))
bcp->uvhub_master = hmaster;
bcp->uvhub_cpu = uv_cpu_hub_info(cpu)->
blade_processor_id;
+ if (bcp->uvhub_cpu >= MAX_CPUS_PER_UVHUB) {
+ printk(KERN_EMERG
+ "%d cpus per uvhub invalid\n",
+ bcp->uvhub_cpu);
+ return 1;
+ }
}
nextsocket:
socket++;
bcp->congested_reps = congested_reps;
bcp->congested_period = congested_period;
}
+ return 0;
}
/*
spin_lock_init(&disable_lock);
congested_cycles = microsec_2_cycles(congested_response_us);
- uv_init_per_cpu(nuvhubs);
+ if (uv_init_per_cpu(nuvhubs)) {
+ nobau = 1;
+ return 0;
+ }
uv_partition_base_pnode = 0x7fffffff;
for (uvhub = 0; uvhub < nuvhubs; uvhub++)
ver = m->apicver;
if ((ver >= 0x14 && m->apicid >= 0xff) || m->apicid >= 0xf) {
printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
- m->apicid, MAX_APICS);
+ m->apicid, MAX_LOCAL_APIC);
return;
}
int __init acpi_numa_init(void)
{
int ret = 0;
+ int nr_cpu_entries = nr_cpu_ids;
+
+#ifdef CONFIG_X86
+ /*
+ * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
+ * SRAT cpu entries could have different order with that in MADT.
+ * So go over all cpu entries in SRAT to get apicid to node mapping.
+ */
+ nr_cpu_entries = MAX_LOCAL_APIC;
+#endif
/* SRAT: Static Resource Affinity Table */
if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
- acpi_parse_x2apic_affinity, nr_cpu_ids);
+ acpi_parse_x2apic_affinity, nr_cpu_entries);
acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
- acpi_parse_processor_affinity, nr_cpu_ids);
+ acpi_parse_processor_affinity, nr_cpu_entries);
ret = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
acpi_parse_memory_affinity,
NR_NODE_MEMBLKS);
static void amd64_tlbflush(struct agp_memory *temp)
{
- k8_flush_garts();
+ amd_flush_garts();
}
static int amd64_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
u32 temp;
struct aper_size_info_32 *values;
- dev = k8_northbridges.nb_misc[0];
+ dev = node_to_amd_nb(0)->misc;
if (dev==NULL)
return 0;
unsigned long gatt_bus = virt_to_phys(agp_bridge->gatt_table_real);
int i;
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return 0;
/* Configure AGP regs in each x86-64 host bridge. */
- for (i = 0; i < k8_northbridges.num; i++) {
+ for (i = 0; i < amd_nb_num(); i++) {
agp_bridge->gart_bus_addr =
- amd64_configure(k8_northbridges.nb_misc[i],
- gatt_bus);
+ amd64_configure(node_to_amd_nb(i)->misc, gatt_bus);
}
- k8_flush_garts();
+ amd_flush_garts();
return 0;
}
u32 tmp;
int i;
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return;
- for (i = 0; i < k8_northbridges.num; i++) {
- struct pci_dev *dev = k8_northbridges.nb_misc[i];
+ for (i = 0; i < amd_nb_num(); i++) {
+ struct pci_dev *dev = node_to_amd_nb(i)->misc;
/* disable gart translation */
pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &tmp);
tmp &= ~GARTEN;
{
int i;
- if (cache_k8_northbridges() < 0)
+ if (amd_cache_northbridges() < 0)
return -ENODEV;
- if (!k8_northbridges.gart_supported)
+ if (!amd_nb_has_feature(AMD_NB_GART))
return -ENODEV;
i = 0;
- for (i = 0; i < k8_northbridges.num; i++) {
- struct pci_dev *dev = k8_northbridges.nb_misc[i];
+ for (i = 0; i < amd_nb_num(); i++) {
+ struct pci_dev *dev = node_to_amd_nb(i)->misc;
if (fix_northbridge(dev, pdev, cap_ptr) < 0) {
dev_err(&dev->dev, "no usable aperture found\n");
#ifdef __x86_64__
}
/* shadow x86-64 registers into ULi registers */
- pci_read_config_dword (k8_northbridges.nb_misc[0], AMD64_GARTAPERTUREBASE,
+ pci_read_config_dword (node_to_amd_nb(0)->misc, AMD64_GARTAPERTUREBASE,
&httfea);
/* if x86-64 aperture base is beyond 4G, exit here */
pci_write_config_dword(dev1, NVIDIA_X86_64_1_APSIZE, tmp);
/* shadow x86-64 registers into NVIDIA registers */
- pci_read_config_dword (k8_northbridges.nb_misc[0], AMD64_GARTAPERTUREBASE,
+ pci_read_config_dword (node_to_amd_nb(0)->misc, AMD64_GARTAPERTUREBASE,
&apbase);
/* if x86-64 aperture base is beyond 4G, exit here */
}
/* First check that we have at least one AMD64 NB */
- if (!pci_dev_present(k8_nb_ids))
+ if (!pci_dev_present(amd_nb_misc_ids))
return -ENODEV;
/* Look for any AGP bridge */
opstate_init();
- if (cache_k8_northbridges() < 0)
+ if (amd_cache_northbridges() < 0)
goto err_ret;
msrs = msrs_alloc();
* to finish initialization of the MC instances.
*/
err = -ENODEV;
- for (nb = 0; nb < k8_northbridges.num; nb++) {
+ for (nb = 0; nb < amd_nb_num(); nb++) {
if (!pvt_lookup[nb])
continue;
#include <linux/sfi.h>
#include <asm/mrst.h>
#include <asm/intel_scu_ipc.h>
+#include <asm/mrst.h>
/* IPC defines the following message types */
#define IPCMSG_WATCHDOG_TIMER 0xF8 /* Set Kernel Watchdog Threshold */
iounmap(ipcdev.ipc_base);
return -ENOMEM;
}
+
+ intel_scu_devices_create();
+
return 0;
}
iounmap(ipcdev.ipc_base);
iounmap(ipcdev.i2c_base);
ipcdev.pdev = NULL;
+ intel_scu_devices_destroy();
}
static const struct pci_device_id pci_ids[] = {
This driver can also be built as a module. If so, the module
will be called rtc-cmos.
+config RTC_DRV_VRTC
+ tristate "Virtual RTC for Moorestown platforms"
+ depends on X86_MRST
+ default y if X86_MRST
+
+ help
+ Say "yes" here to get direct support for the real time clock
+ found on Moorestown platforms. The VRTC is a emulated RTC that
+ derives its clock source from a real RTC in the PMIC. The MC146818
+ style programming interface is mostly conserved, but any
+ updates are done via IPC calls to the system controller FW.
+
config RTC_DRV_DS1216
tristate "Dallas DS1216"
depends on SNI_RM
obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o
obj-$(CONFIG_RTC_DRV_DAVINCI) += rtc-davinci.o
obj-$(CONFIG_RTC_DRV_DM355EVM) += rtc-dm355evm.o
+obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o
obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o
obj-$(CONFIG_RTC_DRV_DS1286) += rtc-ds1286.o
obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o
--- /dev/null
+/*
+ * rtc-mrst.c: Driver for Moorestown virtual RTC
+ *
+ * (C) Copyright 2009 Intel Corporation
+ * Author: Jacob Pan (jacob.jun.pan@intel.com)
+ * Feng Tang (feng.tang@intel.com)
+ *
+ * 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; version 2
+ * of the License.
+ *
+ * Note:
+ * VRTC is emulated by system controller firmware, the real HW
+ * RTC is located in the PMIC device. SCU FW shadows PMIC RTC
+ * in a memory mapped IO space that is visible to the host IA
+ * processor.
+ *
+ * This driver is based upon drivers/rtc/rtc-cmos.c
+ */
+
+/*
+ * Note:
+ * * vRTC only supports binary mode and 24H mode
+ * * vRTC only support PIE and AIE, no UIE, and its PIE only happens
+ * at 23:59:59pm everyday, no support for adjustable frequency
+ * * Alarm function is also limited to hr/min/sec.
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sfi.h>
+
+#include <asm-generic/rtc.h>
+#include <asm/intel_scu_ipc.h>
+#include <asm/mrst.h>
+#include <asm/mrst-vrtc.h>
+
+struct mrst_rtc {
+ struct rtc_device *rtc;
+ struct device *dev;
+ int irq;
+ struct resource *iomem;
+
+ u8 enabled_wake;
+ u8 suspend_ctrl;
+};
+
+static const char driver_name[] = "rtc_mrst";
+
+#define RTC_IRQMASK (RTC_PF | RTC_AF)
+
+static inline int is_intr(u8 rtc_intr)
+{
+ if (!(rtc_intr & RTC_IRQF))
+ return 0;
+ return rtc_intr & RTC_IRQMASK;
+}
+
+/*
+ * rtc_time's year contains the increment over 1900, but vRTC's YEAR
+ * register can't be programmed to value larger than 0x64, so vRTC
+ * driver chose to use 1960 (1970 is UNIX time start point) as the base,
+ * and does the translation at read/write time.
+ *
+ * Why not just use 1970 as the offset? it's because using 1960 will
+ * make it consistent in leap year setting for both vrtc and low-level
+ * physical rtc devices.
+ */
+static int mrst_read_time(struct device *dev, struct rtc_time *time)
+{
+ unsigned long flags;
+
+ if (rtc_is_updating())
+ mdelay(20);
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ time->tm_sec = vrtc_cmos_read(RTC_SECONDS);
+ time->tm_min = vrtc_cmos_read(RTC_MINUTES);
+ time->tm_hour = vrtc_cmos_read(RTC_HOURS);
+ time->tm_mday = vrtc_cmos_read(RTC_DAY_OF_MONTH);
+ time->tm_mon = vrtc_cmos_read(RTC_MONTH);
+ time->tm_year = vrtc_cmos_read(RTC_YEAR);
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
+ /* Adjust for the 1960/1900 */
+ time->tm_year += 60;
+ time->tm_mon--;
+ return RTC_24H;
+}
+
+static int mrst_set_time(struct device *dev, struct rtc_time *time)
+{
+ int ret;
+ unsigned long flags;
+ unsigned char mon, day, hrs, min, sec;
+ unsigned int yrs;
+
+ yrs = time->tm_year;
+ mon = time->tm_mon + 1; /* tm_mon starts at zero */
+ day = time->tm_mday;
+ hrs = time->tm_hour;
+ min = time->tm_min;
+ sec = time->tm_sec;
+
+ if (yrs < 70 || yrs > 138)
+ return -EINVAL;
+ yrs -= 60;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+
+ vrtc_cmos_write(yrs, RTC_YEAR);
+ vrtc_cmos_write(mon, RTC_MONTH);
+ vrtc_cmos_write(day, RTC_DAY_OF_MONTH);
+ vrtc_cmos_write(hrs, RTC_HOURS);
+ vrtc_cmos_write(min, RTC_MINUTES);
+ vrtc_cmos_write(sec, RTC_SECONDS);
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
+ ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETTIME);
+ return ret;
+}
+
+static int mrst_read_alarm(struct device *dev, struct rtc_wkalrm *t)
+{
+ struct mrst_rtc *mrst = dev_get_drvdata(dev);
+ unsigned char rtc_control;
+
+ if (mrst->irq <= 0)
+ return -EIO;
+
+ /* Basic alarms only support hour, minute, and seconds fields.
+ * Some also support day and month, for alarms up to a year in
+ * the future.
+ */
+ t->time.tm_mday = -1;
+ t->time.tm_mon = -1;
+ t->time.tm_year = -1;
+
+ /* vRTC only supports binary mode */
+ spin_lock_irq(&rtc_lock);
+ t->time.tm_sec = vrtc_cmos_read(RTC_SECONDS_ALARM);
+ t->time.tm_min = vrtc_cmos_read(RTC_MINUTES_ALARM);
+ t->time.tm_hour = vrtc_cmos_read(RTC_HOURS_ALARM);
+
+ rtc_control = vrtc_cmos_read(RTC_CONTROL);
+ spin_unlock_irq(&rtc_lock);
+
+ t->enabled = !!(rtc_control & RTC_AIE);
+ t->pending = 0;
+
+ return 0;
+}
+
+static void mrst_checkintr(struct mrst_rtc *mrst, unsigned char rtc_control)
+{
+ unsigned char rtc_intr;
+
+ /*
+ * NOTE after changing RTC_xIE bits we always read INTR_FLAGS;
+ * allegedly some older rtcs need that to handle irqs properly
+ */
+ rtc_intr = vrtc_cmos_read(RTC_INTR_FLAGS);
+ rtc_intr &= (rtc_control & RTC_IRQMASK) | RTC_IRQF;
+ if (is_intr(rtc_intr))
+ rtc_update_irq(mrst->rtc, 1, rtc_intr);
+}
+
+static void mrst_irq_enable(struct mrst_rtc *mrst, unsigned char mask)
+{
+ unsigned char rtc_control;
+
+ /*
+ * Flush any pending IRQ status, notably for update irqs,
+ * before we enable new IRQs
+ */
+ rtc_control = vrtc_cmos_read(RTC_CONTROL);
+ mrst_checkintr(mrst, rtc_control);
+
+ rtc_control |= mask;
+ vrtc_cmos_write(rtc_control, RTC_CONTROL);
+
+ mrst_checkintr(mrst, rtc_control);
+}
+
+static void mrst_irq_disable(struct mrst_rtc *mrst, unsigned char mask)
+{
+ unsigned char rtc_control;
+
+ rtc_control = vrtc_cmos_read(RTC_CONTROL);
+ rtc_control &= ~mask;
+ vrtc_cmos_write(rtc_control, RTC_CONTROL);
+ mrst_checkintr(mrst, rtc_control);
+}
+
+static int mrst_set_alarm(struct device *dev, struct rtc_wkalrm *t)
+{
+ struct mrst_rtc *mrst = dev_get_drvdata(dev);
+ unsigned char hrs, min, sec;
+ int ret = 0;
+
+ if (!mrst->irq)
+ return -EIO;
+
+ hrs = t->time.tm_hour;
+ min = t->time.tm_min;
+ sec = t->time.tm_sec;
+
+ spin_lock_irq(&rtc_lock);
+ /* Next rtc irq must not be from previous alarm setting */
+ mrst_irq_disable(mrst, RTC_AIE);
+
+ /* Update alarm */
+ vrtc_cmos_write(hrs, RTC_HOURS_ALARM);
+ vrtc_cmos_write(min, RTC_MINUTES_ALARM);
+ vrtc_cmos_write(sec, RTC_SECONDS_ALARM);
+
+ spin_unlock_irq(&rtc_lock);
+
+ ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETALARM);
+ if (ret)
+ return ret;
+
+ spin_lock_irq(&rtc_lock);
+ if (t->enabled)
+ mrst_irq_enable(mrst, RTC_AIE);
+
+ spin_unlock_irq(&rtc_lock);
+
+ return 0;
+}
+
+static int mrst_irq_set_state(struct device *dev, int enabled)
+{
+ struct mrst_rtc *mrst = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ if (!mrst->irq)
+ return -ENXIO;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+
+ if (enabled)
+ mrst_irq_enable(mrst, RTC_PIE);
+ else
+ mrst_irq_disable(mrst, RTC_PIE);
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return 0;
+}
+
+#if defined(CONFIG_RTC_INTF_DEV) || defined(CONFIG_RTC_INTF_DEV_MODULE)
+
+/* Currently, the vRTC doesn't support UIE ON/OFF */
+static int
+mrst_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+ struct mrst_rtc *mrst = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ switch (cmd) {
+ case RTC_AIE_OFF:
+ case RTC_AIE_ON:
+ if (!mrst->irq)
+ return -EINVAL;
+ break;
+ default:
+ /* PIE ON/OFF is handled by mrst_irq_set_state() */
+ return -ENOIOCTLCMD;
+ }
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ switch (cmd) {
+ case RTC_AIE_OFF: /* alarm off */
+ mrst_irq_disable(mrst, RTC_AIE);
+ break;
+ case RTC_AIE_ON: /* alarm on */
+ mrst_irq_enable(mrst, RTC_AIE);
+ break;
+ }
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return 0;
+}
+
+#else
+#define mrst_rtc_ioctl NULL
+#endif
+
+#if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE)
+
+static int mrst_procfs(struct device *dev, struct seq_file *seq)
+{
+ unsigned char rtc_control, valid;
+
+ spin_lock_irq(&rtc_lock);
+ rtc_control = vrtc_cmos_read(RTC_CONTROL);
+ valid = vrtc_cmos_read(RTC_VALID);
+ spin_unlock_irq(&rtc_lock);
+
+ return seq_printf(seq,
+ "periodic_IRQ\t: %s\n"
+ "alarm\t\t: %s\n"
+ "BCD\t\t: no\n"
+ "periodic_freq\t: daily (not adjustable)\n",
+ (rtc_control & RTC_PIE) ? "on" : "off",
+ (rtc_control & RTC_AIE) ? "on" : "off");
+}
+
+#else
+#define mrst_procfs NULL
+#endif
+
+static const struct rtc_class_ops mrst_rtc_ops = {
+ .ioctl = mrst_rtc_ioctl,
+ .read_time = mrst_read_time,
+ .set_time = mrst_set_time,
+ .read_alarm = mrst_read_alarm,
+ .set_alarm = mrst_set_alarm,
+ .proc = mrst_procfs,
+ .irq_set_state = mrst_irq_set_state,
+};
+
+static struct mrst_rtc mrst_rtc;
+
+/*
+ * When vRTC IRQ is captured by SCU FW, FW will clear the AIE bit in
+ * Reg B, so no need for this driver to clear it
+ */
+static irqreturn_t mrst_rtc_irq(int irq, void *p)
+{
+ u8 irqstat;
+
+ spin_lock(&rtc_lock);
+ /* This read will clear all IRQ flags inside Reg C */
+ irqstat = vrtc_cmos_read(RTC_INTR_FLAGS);
+ spin_unlock(&rtc_lock);
+
+ irqstat &= RTC_IRQMASK | RTC_IRQF;
+ if (is_intr(irqstat)) {
+ rtc_update_irq(p, 1, irqstat);
+ return IRQ_HANDLED;
+ }
+ return IRQ_NONE;
+}
+
+static int __init
+vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq)
+{
+ int retval = 0;
+ unsigned char rtc_control;
+
+ /* There can be only one ... */
+ if (mrst_rtc.dev)
+ return -EBUSY;
+
+ if (!iomem)
+ return -ENODEV;
+
+ iomem = request_mem_region(iomem->start,
+ iomem->end + 1 - iomem->start,
+ driver_name);
+ if (!iomem) {
+ dev_dbg(dev, "i/o mem already in use.\n");
+ return -EBUSY;
+ }
+
+ mrst_rtc.irq = rtc_irq;
+ mrst_rtc.iomem = iomem;
+
+ mrst_rtc.rtc = rtc_device_register(driver_name, dev,
+ &mrst_rtc_ops, THIS_MODULE);
+ if (IS_ERR(mrst_rtc.rtc)) {
+ retval = PTR_ERR(mrst_rtc.rtc);
+ goto cleanup0;
+ }
+
+ mrst_rtc.dev = dev;
+ dev_set_drvdata(dev, &mrst_rtc);
+ rename_region(iomem, dev_name(&mrst_rtc.rtc->dev));
+
+ spin_lock_irq(&rtc_lock);
+ mrst_irq_disable(&mrst_rtc, RTC_PIE | RTC_AIE);
+ rtc_control = vrtc_cmos_read(RTC_CONTROL);
+ spin_unlock_irq(&rtc_lock);
+
+ if (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY)))
+ dev_dbg(dev, "TODO: support more than 24-hr BCD mode\n");
+
+ if (rtc_irq) {
+ retval = request_irq(rtc_irq, mrst_rtc_irq,
+ IRQF_DISABLED, dev_name(&mrst_rtc.rtc->dev),
+ mrst_rtc.rtc);
+ if (retval < 0) {
+ dev_dbg(dev, "IRQ %d is already in use, err %d\n",
+ rtc_irq, retval);
+ goto cleanup1;
+ }
+ }
+ dev_dbg(dev, "initialised\n");
+ return 0;
+
+cleanup1:
+ mrst_rtc.dev = NULL;
+ rtc_device_unregister(mrst_rtc.rtc);
+cleanup0:
+ release_region(iomem->start, iomem->end + 1 - iomem->start);
+ dev_err(dev, "rtc-mrst: unable to initialise\n");
+ return retval;
+}
+
+static void rtc_mrst_do_shutdown(void)
+{
+ spin_lock_irq(&rtc_lock);
+ mrst_irq_disable(&mrst_rtc, RTC_IRQMASK);
+ spin_unlock_irq(&rtc_lock);
+}
+
+static void __exit rtc_mrst_do_remove(struct device *dev)
+{
+ struct mrst_rtc *mrst = dev_get_drvdata(dev);
+ struct resource *iomem;
+
+ rtc_mrst_do_shutdown();
+
+ if (mrst->irq)
+ free_irq(mrst->irq, mrst->rtc);
+
+ rtc_device_unregister(mrst->rtc);
+ mrst->rtc = NULL;
+
+ iomem = mrst->iomem;
+ release_region(iomem->start, iomem->end + 1 - iomem->start);
+ mrst->iomem = NULL;
+
+ mrst->dev = NULL;
+ dev_set_drvdata(dev, NULL);
+}
+
+#ifdef CONFIG_PM
+static int mrst_suspend(struct device *dev, pm_message_t mesg)
+{
+ struct mrst_rtc *mrst = dev_get_drvdata(dev);
+ unsigned char tmp;
+
+ /* Only the alarm might be a wakeup event source */
+ spin_lock_irq(&rtc_lock);
+ mrst->suspend_ctrl = tmp = vrtc_cmos_read(RTC_CONTROL);
+ if (tmp & (RTC_PIE | RTC_AIE)) {
+ unsigned char mask;
+
+ if (device_may_wakeup(dev))
+ mask = RTC_IRQMASK & ~RTC_AIE;
+ else
+ mask = RTC_IRQMASK;
+ tmp &= ~mask;
+ vrtc_cmos_write(tmp, RTC_CONTROL);
+
+ mrst_checkintr(mrst, tmp);
+ }
+ spin_unlock_irq(&rtc_lock);
+
+ if (tmp & RTC_AIE) {
+ mrst->enabled_wake = 1;
+ enable_irq_wake(mrst->irq);
+ }
+
+ dev_dbg(&mrst_rtc.rtc->dev, "suspend%s, ctrl %02x\n",
+ (tmp & RTC_AIE) ? ", alarm may wake" : "",
+ tmp);
+
+ return 0;
+}
+
+/*
+ * We want RTC alarms to wake us from the deep power saving state
+ */
+static inline int mrst_poweroff(struct device *dev)
+{
+ return mrst_suspend(dev, PMSG_HIBERNATE);
+}
+
+static int mrst_resume(struct device *dev)
+{
+ struct mrst_rtc *mrst = dev_get_drvdata(dev);
+ unsigned char tmp = mrst->suspend_ctrl;
+
+ /* Re-enable any irqs previously active */
+ if (tmp & RTC_IRQMASK) {
+ unsigned char mask;
+
+ if (mrst->enabled_wake) {
+ disable_irq_wake(mrst->irq);
+ mrst->enabled_wake = 0;
+ }
+
+ spin_lock_irq(&rtc_lock);
+ do {
+ vrtc_cmos_write(tmp, RTC_CONTROL);
+
+ mask = vrtc_cmos_read(RTC_INTR_FLAGS);
+ mask &= (tmp & RTC_IRQMASK) | RTC_IRQF;
+ if (!is_intr(mask))
+ break;
+
+ rtc_update_irq(mrst->rtc, 1, mask);
+ tmp &= ~RTC_AIE;
+ } while (mask & RTC_AIE);
+ spin_unlock_irq(&rtc_lock);
+ }
+
+ dev_dbg(&mrst_rtc.rtc->dev, "resume, ctrl %02x\n", tmp);
+
+ return 0;
+}
+
+#else
+#define mrst_suspend NULL
+#define mrst_resume NULL
+
+static inline int mrst_poweroff(struct device *dev)
+{
+ return -ENOSYS;
+}
+
+#endif
+
+static int __init vrtc_mrst_platform_probe(struct platform_device *pdev)
+{
+ return vrtc_mrst_do_probe(&pdev->dev,
+ platform_get_resource(pdev, IORESOURCE_MEM, 0),
+ platform_get_irq(pdev, 0));
+}
+
+static int __exit vrtc_mrst_platform_remove(struct platform_device *pdev)
+{
+ rtc_mrst_do_remove(&pdev->dev);
+ return 0;
+}
+
+static void vrtc_mrst_platform_shutdown(struct platform_device *pdev)
+{
+ if (system_state == SYSTEM_POWER_OFF && !mrst_poweroff(&pdev->dev))
+ return;
+
+ rtc_mrst_do_shutdown();
+}
+
+MODULE_ALIAS("platform:vrtc_mrst");
+
+static struct platform_driver vrtc_mrst_platform_driver = {
+ .probe = vrtc_mrst_platform_probe,
+ .remove = __exit_p(vrtc_mrst_platform_remove),
+ .shutdown = vrtc_mrst_platform_shutdown,
+ .driver = {
+ .name = (char *) driver_name,
+ .suspend = mrst_suspend,
+ .resume = mrst_resume,
+ }
+};
+
+static int __init vrtc_mrst_init(void)
+{
+ return platform_driver_register(&vrtc_mrst_platform_driver);
+}
+
+static void __exit vrtc_mrst_exit(void)
+{
+ platform_driver_unregister(&vrtc_mrst_platform_driver);
+}
+
+module_init(vrtc_mrst_init);
+module_exit(vrtc_mrst_exit);
+
+MODULE_AUTHOR("Jacob Pan; Feng Tang");
+MODULE_DESCRIPTION("Driver for Moorestown virtual RTC");
+MODULE_LICENSE("GPL");
int metadata;
unsigned int revokes = 0;
int x;
- int error;
+ int error = 0;
if (!*top)
sm->sm_first = 0;
if (metadata)
revokes = (height) ? sdp->sd_inptrs : sdp->sd_diptrs;
- error = gfs2_rindex_hold(sdp, &ip->i_alloc->al_ri_gh);
+ if (ip != GFS2_I(sdp->sd_rindex))
+ error = gfs2_rindex_hold(sdp, &ip->i_alloc->al_ri_gh);
+ else if (!sdp->sd_rgrps)
+ error = gfs2_ri_update(ip);
+
if (error)
return error;
out_rlist:
gfs2_rlist_free(&rlist);
out:
- gfs2_glock_dq_uninit(&ip->i_alloc->al_ri_gh);
+ if (ip != GFS2_I(sdp->sd_rindex))
+ gfs2_glock_dq_uninit(&ip->i_alloc->al_ri_gh);
return error;
}
spin_unlock(&gl->gl_spin);
}
-static unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock,
- unsigned int req_state,
- unsigned int flags)
-{
- int ret = LM_OUT_ERROR;
-
- if (!sdp->sd_lockstruct.ls_ops->lm_lock)
- return req_state == LM_ST_UNLOCKED ? 0 : req_state;
-
- if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
- ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock,
- req_state, flags);
- return ret;
-}
-
/**
* do_xmote - Calls the DLM to change the state of a lock
* @gl: The lock state
lck_flags &= (LM_FLAG_TRY | LM_FLAG_TRY_1CB | LM_FLAG_NOEXP |
LM_FLAG_PRIORITY);
- BUG_ON(gl->gl_state == target);
- BUG_ON(gl->gl_state == gl->gl_target);
+ GLOCK_BUG_ON(gl, gl->gl_state == target);
+ GLOCK_BUG_ON(gl, gl->gl_state == gl->gl_target);
if ((target == LM_ST_UNLOCKED || target == LM_ST_DEFERRED) &&
glops->go_inval) {
set_bit(GLF_INVALIDATE_IN_PROGRESS, &gl->gl_flags);
do_error(gl, 0); /* Fail queued try locks */
}
+ gl->gl_req = target;
spin_unlock(&gl->gl_spin);
if (glops->go_xmote_th)
glops->go_xmote_th(gl);
gl->gl_state == LM_ST_DEFERRED) &&
!(lck_flags & (LM_FLAG_TRY | LM_FLAG_TRY_1CB)))
lck_flags |= LM_FLAG_TRY_1CB;
- ret = gfs2_lm_lock(sdp, gl, target, lck_flags);
- if (!(ret & LM_OUT_ASYNC)) {
- finish_xmote(gl, ret);
+ if (sdp->sd_lockstruct.ls_ops->lm_lock) {
+ /* lock_dlm */
+ ret = sdp->sd_lockstruct.ls_ops->lm_lock(gl, target, lck_flags);
+ GLOCK_BUG_ON(gl, ret);
+ } else { /* lock_nolock */
+ finish_xmote(gl, target);
if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
gfs2_glock_put(gl);
- } else {
- GLOCK_BUG_ON(gl, ret != LM_OUT_ASYNC);
}
+
spin_lock(&gl->gl_spin);
}
void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...)
{
+ struct va_format vaf;
va_list args;
va_start(args, fmt);
+
if (seq) {
struct gfs2_glock_iter *gi = seq->private;
vsprintf(gi->string, fmt, args);
seq_printf(seq, gi->string);
} else {
- printk(KERN_ERR " ");
- vprintk(fmt, args);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ printk(KERN_ERR " %pV", &vaf);
}
+
va_end(args);
}
* @gl: Pointer to the glock
* @ret: The return value from the dlm
*
+ * The gl_reply field is under the gl_spin lock so that it is ok
+ * to use a bitfield shared with other glock state fields.
*/
void gfs2_glock_complete(struct gfs2_glock *gl, int ret)
{
struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct;
+ spin_lock(&gl->gl_spin);
gl->gl_reply = ret;
if (unlikely(test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))) {
- spin_lock(&gl->gl_spin);
if (gfs2_should_freeze(gl)) {
set_bit(GLF_FROZEN, &gl->gl_flags);
spin_unlock(&gl->gl_spin);
return;
}
- spin_unlock(&gl->gl_spin);
}
+
+ spin_unlock(&gl->gl_spin);
set_bit(GLF_REPLY_PENDING, &gl->gl_flags);
+ smp_wmb();
gfs2_glock_hold(gl);
if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
gfs2_glock_put(gl);
static int dump_holder(struct seq_file *seq, const struct gfs2_holder *gh)
{
struct task_struct *gh_owner = NULL;
- char buffer[KSYM_SYMBOL_LEN];
char flags_buf[32];
- sprint_symbol(buffer, gh->gh_ip);
if (gh->gh_owner_pid)
gh_owner = pid_task(gh->gh_owner_pid, PIDTYPE_PID);
- gfs2_print_dbg(seq, " H: s:%s f:%s e:%d p:%ld [%s] %s\n",
- state2str(gh->gh_state),
- hflags2str(flags_buf, gh->gh_flags, gh->gh_iflags),
- gh->gh_error,
- gh->gh_owner_pid ? (long)pid_nr(gh->gh_owner_pid) : -1,
- gh_owner ? gh_owner->comm : "(ended)", buffer);
+ gfs2_print_dbg(seq, " H: s:%s f:%s e:%d p:%ld [%s] %pS\n",
+ state2str(gh->gh_state),
+ hflags2str(flags_buf, gh->gh_flags, gh->gh_iflags),
+ gh->gh_error,
+ gh->gh_owner_pid ? (long)pid_nr(gh->gh_owner_pid) : -1,
+ gh_owner ? gh_owner->comm : "(ended)",
+ (void *)gh->gh_ip);
return 0;
}
}
#endif
- glock_workqueue = alloc_workqueue("glock_workqueue", WQ_RESCUER |
+ glock_workqueue = alloc_workqueue("glock_workqueue", WQ_MEM_RECLAIM |
WQ_HIGHPRI | WQ_FREEZEABLE, 0);
if (IS_ERR(glock_workqueue))
return PTR_ERR(glock_workqueue);
- gfs2_delete_workqueue = alloc_workqueue("delete_workqueue", WQ_RESCUER |
- WQ_FREEZEABLE, 0);
+ gfs2_delete_workqueue = alloc_workqueue("delete_workqueue",
+ WQ_MEM_RECLAIM | WQ_FREEZEABLE,
+ 0);
if (IS_ERR(gfs2_delete_workqueue)) {
destroy_workqueue(glock_workqueue);
return PTR_ERR(gfs2_delete_workqueue);
#define GL_ASYNC 0x00000040
#define GL_EXACT 0x00000080
#define GL_SKIP 0x00000100
-#define GL_ATIME 0x00000200
#define GL_NOCACHE 0x00000400
/*
- * lm_lock() and lm_async_cb return flags
+ * lm_async_cb return flags
*
* LM_OUT_ST_MASK
* Masks the lower two bits of lock state in the returned value.
* LM_OUT_CANCELED
* The lock request was canceled.
*
- * LM_OUT_ASYNC
- * The result of the request will be returned in an LM_CB_ASYNC callback.
- *
*/
#define LM_OUT_ST_MASK 0x00000003
#define LM_OUT_CANCELED 0x00000008
-#define LM_OUT_ASYNC 0x00000080
-#define LM_OUT_ERROR 0x00000100
+#define LM_OUT_ERROR 0x00000004
/*
* lm_recovery_done() messages
void (*lm_unmount) (struct gfs2_sbd *sdp);
void (*lm_withdraw) (struct gfs2_sbd *sdp);
void (*lm_put_lock) (struct kmem_cache *cachep, struct gfs2_glock *gl);
- unsigned int (*lm_lock) (struct gfs2_glock *gl,
- unsigned int req_state, unsigned int flags);
+ int (*lm_lock) (struct gfs2_glock *gl, unsigned int req_state,
+ unsigned int flags);
void (*lm_cancel) (struct gfs2_glock *gl);
const match_table_t *lm_tokens;
};
-#define LM_FLAG_TRY 0x00000001
-#define LM_FLAG_TRY_1CB 0x00000002
-#define LM_FLAG_NOEXP 0x00000004
-#define LM_FLAG_ANY 0x00000008
-#define LM_FLAG_PRIORITY 0x00000010
-
-#define GL_ASYNC 0x00000040
-#define GL_EXACT 0x00000080
-#define GL_SKIP 0x00000100
-#define GL_NOCACHE 0x00000400
-
-#define GLR_TRYFAILED 13
-
extern struct workqueue_struct *gfs2_delete_workqueue;
static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl)
{
int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs);
+
+__attribute__ ((format(printf, 2, 3)))
void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...);
/**
if (gl->gl_state != LM_ST_UNLOCKED &&
test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
- flush_workqueue(gfs2_delete_workqueue);
gfs2_meta_syncfs(sdp);
gfs2_log_shutdown(sdp);
}
spinlock_t gl_spin;
- unsigned int gl_state;
- unsigned int gl_target;
- unsigned int gl_reply;
+ /* State fields protected by gl_spin */
+ unsigned int gl_state:2, /* Current state */
+ gl_target:2, /* Target state */
+ gl_demote_state:2, /* State requested by remote node */
+ gl_req:2, /* State in last dlm request */
+ gl_reply:8; /* Last reply from the dlm */
+
unsigned int gl_hash;
- unsigned int gl_req;
- unsigned int gl_demote_state; /* state requested by remote node */
unsigned long gl_demote_time; /* time of first demote request */
struct list_head gl_holders;
if (error)
return error;
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
- if (error)
- return error;
- }
-
setattr_copy(inode, attr);
mark_inode_dirty(inode);
-
- gfs2_assert_warn(GFS2_SB(inode), !error);
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
return lkf;
}
-static unsigned int gdlm_lock(struct gfs2_glock *gl,
- unsigned int req_state, unsigned int flags)
+static int gdlm_lock(struct gfs2_glock *gl, unsigned int req_state,
+ unsigned int flags)
{
struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct;
- int error;
int req;
u32 lkf;
- gl->gl_req = req_state;
req = make_mode(req_state);
lkf = make_flags(gl->gl_lksb.sb_lkid, flags, req);
* Submit the actual lock request.
*/
- error = dlm_lock(ls->ls_dlm, req, &gl->gl_lksb, lkf, gl->gl_strname,
- GDLM_STRNAME_BYTES - 1, 0, gdlm_ast, gl, gdlm_bast);
- if (error == -EAGAIN)
- return 0;
- if (error)
- return LM_OUT_ERROR;
- return LM_OUT_ASYNC;
+ return dlm_lock(ls->ls_dlm, req, &gl->gl_lksb, lkf, gl->gl_strname,
+ GDLM_STRNAME_BYTES - 1, 0, gdlm_ast, gl, gdlm_bast);
}
static void gdlm_put_lock(struct kmem_cache *cachep, struct gfs2_glock *gl)
{
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_sbd *sdp = GFS2_SB(inode);
- struct buffer_head *dibh;
u32 ouid, ogid, nuid, ngid;
int error;
if (error)
goto out_gunlock_q;
- error = gfs2_meta_inode_buffer(ip, &dibh);
+ error = gfs2_setattr_simple(ip, attr);
if (error)
goto out_end_trans;
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- int error;
-
- error = vmtruncate(inode, attr->ia_size);
- gfs2_assert_warn(sdp, !error);
- }
-
- setattr_copy(inode, attr);
- mark_inode_dirty(inode);
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
-
if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
u64 blocks = gfs2_get_inode_blocks(&ip->i_inode);
gfs2_quota_change(ip, -blocks, ouid, ogid);
qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift);
qd->qd_qb.qb_limit = qp->qu_limit;
}
+ if (fdq->d_fieldmask & FS_DQ_BCOUNT) {
+ qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift);
+ qd->qd_qb.qb_value = qp->qu_value;
+ }
}
/* Write the quota into the quota file on disk */
}
/* GFS2 only supports a subset of the XFS fields */
-#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD)
+#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id,
struct fs_disk_quota *fdq)
if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
fdq->d_fieldmask ^= FS_DQ_BSOFT;
+
if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
fdq->d_fieldmask ^= FS_DQ_BHARD;
+
+ if ((fdq->d_fieldmask & FS_DQ_BCOUNT) &&
+ ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
+ fdq->d_fieldmask ^= FS_DQ_BCOUNT;
+
if (fdq->d_fieldmask == 0)
goto out_i;
.get_dqblk = gfs2_get_dqblk,
.set_dqblk = gfs2_set_dqblk,
};
-
for (rgrps = 0;; rgrps++) {
loff_t pos = rgrps * sizeof(struct gfs2_rindex);
- if (pos + sizeof(struct gfs2_rindex) >= i_size_read(inode))
+ if (pos + sizeof(struct gfs2_rindex) > i_size_read(inode))
break;
error = gfs2_internal_read(ip, &ra_state, buf, &pos,
sizeof(struct gfs2_rindex));
* Returns: 0 on successful update, error code otherwise
*/
-static int gfs2_ri_update(struct gfs2_inode *ip)
+int gfs2_ri_update(struct gfs2_inode *ip)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct inode *inode = &ip->i_inode;
return 0;
}
-/**
- * gfs2_ri_update_special - Pull in a new resource index from the disk
- *
- * This is a special version that's safe to call from gfs2_inplace_reserve_i.
- * In this case we know that we don't have any resource groups in memory yet.
- *
- * @ip: pointer to the rindex inode
- *
- * Returns: 0 on successful update, error code otherwise
- */
-static int gfs2_ri_update_special(struct gfs2_inode *ip)
-{
- struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- struct inode *inode = &ip->i_inode;
- struct file_ra_state ra_state;
- struct gfs2_rgrpd *rgd;
- unsigned int max_data = 0;
- int error;
-
- file_ra_state_init(&ra_state, inode->i_mapping);
- for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) {
- /* Ignore partials */
- if ((sdp->sd_rgrps + 1) * sizeof(struct gfs2_rindex) >
- i_size_read(inode))
- break;
- error = read_rindex_entry(ip, &ra_state);
- if (error) {
- clear_rgrpdi(sdp);
- return error;
- }
- }
- list_for_each_entry(rgd, &sdp->sd_rindex_list, rd_list)
- if (rgd->rd_data > max_data)
- max_data = rgd->rd_data;
- sdp->sd_max_rg_data = max_data;
-
- sdp->sd_rindex_uptodate = 1;
- return 0;
-}
-
/**
* gfs2_rindex_hold - Grab a lock on the rindex
* @sdp: The GFS2 superblock
error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
else if (!sdp->sd_rgrps) /* We may not have the rindex read
in, so: */
- error = gfs2_ri_update_special(ip);
+ error = gfs2_ri_update(ip);
if (error)
return error;
}
+try_again:
do {
error = get_local_rgrp(ip, &last_unlinked);
/* If there is no space, flushing the log may release some */
- if (error)
+ if (error) {
+ if (ip == GFS2_I(sdp->sd_rindex) &&
+ !sdp->sd_rindex_uptodate) {
+ error = gfs2_ri_update(ip);
+ if (error)
+ return error;
+ goto try_again;
+ }
gfs2_log_flush(sdp, NULL);
+ }
} while (error && tries++ < 3);
if (error) {
extern void gfs2_inplace_release(struct gfs2_inode *ip);
+extern int gfs2_ri_update(struct gfs2_inode *ip);
extern int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n);
extern int gfs2_alloc_di(struct gfs2_inode *ip, u64 *bn, u64 *generation);
int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
{
- struct inode *inode = &ip->i_inode;
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_ea_location el;
- struct buffer_head *dibh;
int error;
error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
if (error)
return error;
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out_trans_end;
-
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- int error;
-
- error = vmtruncate(inode, attr->ia_size);
- gfs2_assert_warn(GFS2_SB(inode), !error);
- }
-
- setattr_copy(inode, attr);
- mark_inode_dirty(inode);
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
-
-out_trans_end:
+ error = gfs2_setattr_simple(ip, attr);
gfs2_trans_end(sdp);
return error;
}
#endif
+#ifdef CONFIG_SCHED_AUTOGROUP
+/*
+ * Print out autogroup related information:
+ */
+static int sched_autogroup_show(struct seq_file *m, void *v)
+{
+ struct inode *inode = m->private;
+ struct task_struct *p;
+
+ p = get_proc_task(inode);
+ if (!p)
+ return -ESRCH;
+ proc_sched_autogroup_show_task(p, m);
+
+ put_task_struct(p);
+
+ return 0;
+}
+
+static ssize_t
+sched_autogroup_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *offset)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct task_struct *p;
+ char buffer[PROC_NUMBUF];
+ long nice;
+ int err;
+
+ memset(buffer, 0, sizeof(buffer));
+ if (count > sizeof(buffer) - 1)
+ count = sizeof(buffer) - 1;
+ if (copy_from_user(buffer, buf, count))
+ return -EFAULT;
+
+ err = strict_strtol(strstrip(buffer), 0, &nice);
+ if (err)
+ return -EINVAL;
+
+ p = get_proc_task(inode);
+ if (!p)
+ return -ESRCH;
+
+ err = nice;
+ err = proc_sched_autogroup_set_nice(p, &err);
+ if (err)
+ count = err;
+
+ put_task_struct(p);
+
+ return count;
+}
+
+static int sched_autogroup_open(struct inode *inode, struct file *filp)
+{
+ int ret;
+
+ ret = single_open(filp, sched_autogroup_show, NULL);
+ if (!ret) {
+ struct seq_file *m = filp->private_data;
+
+ m->private = inode;
+ }
+ return ret;
+}
+
+static const struct file_operations proc_pid_sched_autogroup_operations = {
+ .open = sched_autogroup_open,
+ .read = seq_read,
+ .write = sched_autogroup_write,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#endif /* CONFIG_SCHED_AUTOGROUP */
+
static ssize_t comm_write(struct file *file, const char __user *buf,
size_t count, loff_t *offset)
{
INF("limits", S_IRUGO, proc_pid_limits),
#ifdef CONFIG_SCHED_DEBUG
REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations),
+#endif
+#ifdef CONFIG_SCHED_AUTOGROUP
+ REG("autogroup", S_IRUGO|S_IWUSR, proc_pid_sched_autogroup_operations),
#endif
REG("comm", S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
extern int wait_for_completion_killable(struct completion *x);
extern unsigned long wait_for_completion_timeout(struct completion *x,
unsigned long timeout);
-extern unsigned long wait_for_completion_interruptible_timeout(
- struct completion *x, unsigned long timeout);
-extern unsigned long wait_for_completion_killable_timeout(
- struct completion *x, unsigned long timeout);
+extern long wait_for_completion_interruptible_timeout(
+ struct completion *x, unsigned long timeout);
+extern long wait_for_completion_killable_timeout(
+ struct completion *x, unsigned long timeout);
extern bool try_wait_for_completion(struct completion *x);
extern bool completion_done(struct completion *x);
extern int ddebug_remove_module(const char *mod_name);
#define dynamic_pr_debug(fmt, ...) do { \
- __label__ do_printk; \
- __label__ out; \
static struct _ddebug descriptor \
__used \
__attribute__((section("__verbose"), aligned(8))) = \
{ KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \
_DPRINTK_FLAGS_DEFAULT }; \
- JUMP_LABEL(&descriptor.enabled, do_printk); \
- goto out; \
-do_printk: \
- printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
-out: ; \
+ if (unlikely(descriptor.enabled)) \
+ printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
} while (0)
#define dynamic_dev_dbg(dev, fmt, ...) do { \
- __label__ do_printk; \
- __label__ out; \
static struct _ddebug descriptor \
__used \
__attribute__((section("__verbose"), aligned(8))) = \
{ KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \
_DPRINTK_FLAGS_DEFAULT }; \
- JUMP_LABEL(&descriptor.enabled, do_printk); \
- goto out; \
-do_printk: \
- dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
-out: ; \
+ if (unlikely(descriptor.enabled)) \
+ dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
} while (0)
#else
#include <linux/wait.h>
#include <linux/percpu.h>
#include <linux/timer.h>
-
+#include <linux/timerqueue.h>
struct hrtimer_clock_base;
struct hrtimer_cpu_base;
/**
* struct hrtimer - the basic hrtimer structure
- * @node: red black tree node for time ordered insertion
- * @_expires: the absolute expiry time in the hrtimers internal
+ * @node: timerqueue node, which also manages node.expires,
+ * the absolute expiry time in the hrtimers internal
* representation. The time is related to the clock on
* which the timer is based. Is setup by adding
* slack to the _softexpires value. For non range timers
* The hrtimer structure must be initialized by hrtimer_init()
*/
struct hrtimer {
- struct rb_node node;
- ktime_t _expires;
+ struct timerqueue_node node;
ktime_t _softexpires;
enum hrtimer_restart (*function)(struct hrtimer *);
struct hrtimer_clock_base *base;
struct hrtimer_clock_base {
struct hrtimer_cpu_base *cpu_base;
clockid_t index;
- struct rb_root active;
- struct rb_node *first;
+ struct timerqueue_head active;
ktime_t resolution;
ktime_t (*get_time)(void);
ktime_t softirq_time;
* @lock: lock protecting the base and associated clock bases
* and timers
* @clock_base: array of clock bases for this cpu
- * @curr_timer: the timer which is executing a callback right now
* @expires_next: absolute time of the next event which was scheduled
* via clock_set_next_event()
* @hres_active: State of high resolution mode
static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
{
- timer->_expires = time;
+ timer->node.expires = time;
timer->_softexpires = time;
}
static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta)
{
timer->_softexpires = time;
- timer->_expires = ktime_add_safe(time, delta);
+ timer->node.expires = ktime_add_safe(time, delta);
}
static inline void hrtimer_set_expires_range_ns(struct hrtimer *timer, ktime_t time, unsigned long delta)
{
timer->_softexpires = time;
- timer->_expires = ktime_add_safe(time, ns_to_ktime(delta));
+ timer->node.expires = ktime_add_safe(time, ns_to_ktime(delta));
}
static inline void hrtimer_set_expires_tv64(struct hrtimer *timer, s64 tv64)
{
- timer->_expires.tv64 = tv64;
+ timer->node.expires.tv64 = tv64;
timer->_softexpires.tv64 = tv64;
}
static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time)
{
- timer->_expires = ktime_add_safe(timer->_expires, time);
+ timer->node.expires = ktime_add_safe(timer->node.expires, time);
timer->_softexpires = ktime_add_safe(timer->_softexpires, time);
}
static inline void hrtimer_add_expires_ns(struct hrtimer *timer, u64 ns)
{
- timer->_expires = ktime_add_ns(timer->_expires, ns);
+ timer->node.expires = ktime_add_ns(timer->node.expires, ns);
timer->_softexpires = ktime_add_ns(timer->_softexpires, ns);
}
static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer)
{
- return timer->_expires;
+ return timer->node.expires;
}
static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer)
static inline s64 hrtimer_get_expires_tv64(const struct hrtimer *timer)
{
- return timer->_expires.tv64;
+ return timer->node.expires.tv64;
}
static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer)
{
static inline s64 hrtimer_get_expires_ns(const struct hrtimer *timer)
{
- return ktime_to_ns(timer->_expires);
+ return ktime_to_ns(timer->node.expires);
}
static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer)
{
- return ktime_sub(timer->_expires, timer->base->get_time());
+ return ktime_sub(timer->node.expires, timer->base->get_time());
}
#ifdef CONFIG_HIGH_RES_TIMERS
#include <linux/securebits.h>
#include <net/net_namespace.h>
+#ifdef CONFIG_SMP
+# define INIT_PUSHABLE_TASKS(tsk) \
+ .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
+#else
+# define INIT_PUSHABLE_TASKS(tsk)
+#endif
+
extern struct files_struct init_files;
extern struct fs_struct init_fs;
*/
# define CAP_INIT_BSET CAP_FULL_SET
+#ifdef CONFIG_RCU_BOOST
+#define INIT_TASK_RCU_BOOST() \
+ .rcu_boost_mutex = NULL,
+#else
+#define INIT_TASK_RCU_BOOST()
+#endif
#ifdef CONFIG_TREE_PREEMPT_RCU
#define INIT_TASK_RCU_TREE_PREEMPT() \
.rcu_blocked_node = NULL,
.rcu_read_lock_nesting = 0, \
.rcu_read_unlock_special = 0, \
.rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
- INIT_TASK_RCU_TREE_PREEMPT()
+ INIT_TASK_RCU_TREE_PREEMPT() \
+ INIT_TASK_RCU_BOOST()
#else
#define INIT_TASK_RCU_PREEMPT(tsk)
#endif
.nr_cpus_allowed = NR_CPUS, \
}, \
.tasks = LIST_HEAD_INIT(tsk.tasks), \
- .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), \
+ INIT_PUSHABLE_TASKS(tsk) \
.ptraced = LIST_HEAD_INIT(tsk.ptraced), \
.ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
.real_parent = &tsk, \
struct irqaction {
irq_handler_t handler;
unsigned long flags;
- const char *name;
void *dev_id;
struct irqaction *next;
int irq;
- struct proc_dir_entry *dir;
irq_handler_t thread_fn;
struct task_struct *thread;
unsigned long thread_flags;
-};
+ const char *name;
+ struct proc_dir_entry *dir;
+} ____cacheline_internodealigned_in_smp;
extern irqreturn_t no_action(int cpl, void *dev_id);
/* The size of the executable code in each section. */
unsigned int init_text_size, core_text_size;
+ /* Size of RO sections of the module (text+rodata) */
+ unsigned int init_ro_size, core_ro_size;
+
/* Arch-specific module values */
struct mod_arch_specific arch;
{
return 0;
}
-
#endif /* CONFIG_MODULES */
#ifdef CONFIG_SYSFS
#define __MODULE_STRING(x) __stringify(x)
+#ifdef CONFIG_DEBUG_SET_MODULE_RONX
+extern void set_all_modules_text_rw(void);
+extern void set_all_modules_text_ro(void);
+#else
+static inline void set_all_modules_text_rw(void) { }
+static inline void set_all_modules_text_ro(void) { }
+#endif
#ifdef CONFIG_GENERIC_BUG
void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
extern void mutex_unlock(struct mutex *lock);
extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock);
+#ifndef CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX
+#define arch_mutex_cpu_relax() cpu_relax()
+#endif
+
#endif
#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_raw(list_next_rcu(head)); \
- pos != (head); \
- pos = rcu_dereference_raw(list_next_rcu((pos)))
-
/**
* list_for_each_entry_rcu - iterate over rcu list of given type
* @pos: the type * to use as a loop cursor.
extern int rcutorture_runnable; /* for sysctl */
#endif /* #ifdef CONFIG_RCU_TORTURE_TEST */
+#define UINT_CMP_GE(a, b) (UINT_MAX / 2 >= (a) - (b))
+#define UINT_CMP_LT(a, b) (UINT_MAX / 2 < (a) - (b))
#define ULONG_CMP_GE(a, b) (ULONG_MAX / 2 >= (a) - (b))
#define ULONG_CMP_LT(a, b) (ULONG_MAX / 2 < (a) - (b))
extern void synchronize_sched(void);
extern void rcu_barrier_bh(void);
extern void rcu_barrier_sched(void);
-extern void synchronize_sched_expedited(void);
extern int sched_expedited_torture_stats(char *page);
static inline void __rcu_read_lock_bh(void)
#endif /* #else #ifdef CONFIG_PREEMPT_RCU */
/* Internal to kernel */
-extern void rcu_init(void);
extern void rcu_sched_qs(int cpu);
extern void rcu_bh_qs(int cpu);
extern void rcu_check_callbacks(int cpu, int user);
#include <linux/cache.h>
-#define rcu_init_sched() do { } while (0)
+static inline void rcu_init(void)
+{
+}
#ifdef CONFIG_TINY_RCU
synchronize_sched();
}
+static inline void synchronize_sched_expedited(void)
+{
+ synchronize_sched();
+}
+
#ifdef CONFIG_TINY_RCU
static inline void rcu_preempt_note_context_switch(void)
}
#ifdef CONFIG_DEBUG_LOCK_ALLOC
-
extern int rcu_scheduler_active __read_mostly;
extern void rcu_scheduler_starting(void);
-
#else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
-
static inline void rcu_scheduler_starting(void)
{
}
-
#endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
#endif /* __LINUX_RCUTINY_H */
#ifndef __LINUX_RCUTREE_H
#define __LINUX_RCUTREE_H
+extern void rcu_init(void);
extern void rcu_note_context_switch(int cpu);
extern int rcu_needs_cpu(int cpu);
extern void rcu_cpu_stall_reset(void);
#endif /* #else #ifdef CONFIG_TREE_PREEMPT_RCU */
extern void synchronize_rcu_bh(void);
+extern void synchronize_sched_expedited(void);
extern void synchronize_rcu_expedited(void);
static inline void synchronize_rcu_bh_expedited(void)
spinlock_t lock;
};
+struct autogroup;
+
/*
* NOTE! "signal_struct" does not have it's own
* locking, because a shared signal_struct always
struct tty_struct *tty; /* NULL if no tty */
+#ifdef CONFIG_SCHED_AUTOGROUP
+ struct autogroup *autogroup;
+#endif
/*
* Cumulative resource counters for dead threads in the group,
* and for reaped dead child processes forked by this group.
#ifdef CONFIG_TREE_PREEMPT_RCU
struct rcu_node *rcu_blocked_node;
#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
+#ifdef CONFIG_RCU_BOOST
+ struct rt_mutex *rcu_boost_mutex;
+#endif /* #ifdef CONFIG_RCU_BOOST */
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
struct sched_info sched_info;
#endif
struct list_head tasks;
+#ifdef CONFIG_SMP
struct plist_node pushable_tasks;
+#endif
struct mm_struct *mm, *active_mm;
#if defined(SPLIT_RSS_COUNTING)
#ifdef CONFIG_PREEMPT_RCU
#define RCU_READ_UNLOCK_BLOCKED (1 << 0) /* blocked while in RCU read-side. */
-#define RCU_READ_UNLOCK_NEED_QS (1 << 1) /* RCU core needs CPU response. */
+#define RCU_READ_UNLOCK_BOOSTED (1 << 1) /* boosted while in RCU read-side. */
+#define RCU_READ_UNLOCK_NEED_QS (1 << 2) /* RCU core needs CPU response. */
static inline void rcu_copy_process(struct task_struct *p)
{
p->rcu_read_unlock_special = 0;
#ifdef CONFIG_TREE_PREEMPT_RCU
p->rcu_blocked_node = NULL;
-#endif
+#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
+#ifdef CONFIG_RCU_BOOST
+ p->rcu_boost_mutex = NULL;
+#endif /* #ifdef CONFIG_RCU_BOOST */
INIT_LIST_HEAD(&p->rcu_node_entry);
}
extern void sched_clock_idle_wakeup_event(u64 delta_ns);
#ifdef CONFIG_HOTPLUG_CPU
-extern void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p);
extern void idle_task_exit(void);
#else
static inline void idle_task_exit(void) {}
#endif
-extern void sched_idle_next(void);
-
#if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP)
extern void wake_up_idle_cpu(int cpu);
#else
extern unsigned int sysctl_sched_latency;
extern unsigned int sysctl_sched_min_granularity;
extern unsigned int sysctl_sched_wakeup_granularity;
-extern unsigned int sysctl_sched_shares_ratelimit;
-extern unsigned int sysctl_sched_shares_thresh;
extern unsigned int sysctl_sched_child_runs_first;
enum sched_tunable_scaling {
extern unsigned int sysctl_sched_nr_migrate;
extern unsigned int sysctl_sched_time_avg;
extern unsigned int sysctl_timer_migration;
+extern unsigned int sysctl_sched_shares_window;
int sched_proc_update_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length,
extern unsigned int sysctl_sched_compat_yield;
+#ifdef CONFIG_SCHED_AUTOGROUP
+extern unsigned int sysctl_sched_autogroup_enabled;
+
+extern void sched_autogroup_create_attach(struct task_struct *p);
+extern void sched_autogroup_detach(struct task_struct *p);
+extern void sched_autogroup_fork(struct signal_struct *sig);
+extern void sched_autogroup_exit(struct signal_struct *sig);
+#ifdef CONFIG_PROC_FS
+extern void proc_sched_autogroup_show_task(struct task_struct *p, struct seq_file *m);
+extern int proc_sched_autogroup_set_nice(struct task_struct *p, int *nice);
+#endif
+#else
+static inline void sched_autogroup_create_attach(struct task_struct *p) { }
+static inline void sched_autogroup_detach(struct task_struct *p) { }
+static inline void sched_autogroup_fork(struct signal_struct *sig) { }
+static inline void sched_autogroup_exit(struct signal_struct *sig) { }
+#endif
+
#ifdef CONFIG_RT_MUTEXES
extern int rt_mutex_getprio(struct task_struct *p);
extern void rt_mutex_setprio(struct task_struct *p, int prio);
extern int can_nice(const struct task_struct *p, const int nice);
extern int task_curr(const struct task_struct *p);
extern int idle_cpu(int cpu);
-extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
+extern int sched_setscheduler(struct task_struct *, int,
+ const struct sched_param *);
extern int sched_setscheduler_nocheck(struct task_struct *, int,
- struct sched_param *);
+ const struct sched_param *);
extern struct task_struct *idle_task(int cpu);
extern struct task_struct *curr_task(int cpu);
extern void set_curr_task(int cpu, struct task_struct *p);
#define SFI_OEM_ID_SIZE 6
#define SFI_OEM_TABLE_ID_SIZE 8
+#define SFI_NAME_LEN 16
+
#define SFI_SYST_SEARCH_BEGIN 0x000E0000
#define SFI_SYST_SEARCH_END 0x000FFFFF
u16 addr;
u8 irq;
u32 max_freq;
- char name[16];
+ char name[SFI_NAME_LEN];
} __packed;
struct sfi_gpio_table_entry {
- char controller_name[16];
+ char controller_name[SFI_NAME_LEN];
u16 pin_no;
- char pin_name[16];
+ char pin_name[SFI_NAME_LEN];
} __packed;
typedef int (*sfi_table_handler) (struct sfi_table_header *table);
int slack;
#ifdef CONFIG_TIMER_STATS
+ int start_pid;
void *start_site;
char start_comm[16];
- int start_pid;
#endif
#ifdef CONFIG_LOCKDEP
struct lockdep_map lockdep_map;
#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)
#endif
+/*
+ * Note that all tvec_bases are 2 byte aligned and lower bit of
+ * base in timer_list is guaranteed to be zero. Use the LSB to
+ * indicate whether the timer is deferrable.
+ *
+ * A deferrable timer will work normally when the system is busy, but
+ * will not cause a CPU to come out of idle just to service it; instead,
+ * the timer will be serviced when the CPU eventually wakes up with a
+ * subsequent non-deferrable timer.
+ */
+#define TBASE_DEFERRABLE_FLAG (0x1)
+
#define TIMER_INITIALIZER(_function, _expires, _data) { \
.entry = { .prev = TIMER_ENTRY_STATIC }, \
.function = (_function), \
.expires = (_expires), \
.data = (_data), \
.base = &boot_tvec_bases, \
+ .slack = -1, \
+ __TIMER_LOCKDEP_MAP_INITIALIZER( \
+ __FILE__ ":" __stringify(__LINE__)) \
+ }
+
+#define TBASE_MAKE_DEFERRED(ptr) ((struct tvec_base *) \
+ ((unsigned char *)(ptr) + TBASE_DEFERRABLE_FLAG))
+
+#define TIMER_DEFERRED_INITIALIZER(_function, _expires, _data) {\
+ .entry = { .prev = TIMER_ENTRY_STATIC }, \
+ .function = (_function), \
+ .expires = (_expires), \
+ .data = (_data), \
+ .base = TBASE_MAKE_DEFERRED(&boot_tvec_bases), \
__TIMER_LOCKDEP_MAP_INITIALIZER( \
__FILE__ ":" __stringify(__LINE__)) \
}
extern void add_timer(struct timer_list *timer);
+extern int try_to_del_timer_sync(struct timer_list *timer);
+
#ifdef CONFIG_SMP
- extern int try_to_del_timer_sync(struct timer_list *timer);
extern int del_timer_sync(struct timer_list *timer);
#else
-# define try_to_del_timer_sync(t) del_timer(t)
# define del_timer_sync(t) del_timer(t)
#endif
--- /dev/null
+#ifndef _LINUX_TIMERQUEUE_H
+#define _LINUX_TIMERQUEUE_H
+
+#include <linux/rbtree.h>
+#include <linux/ktime.h>
+
+
+struct timerqueue_node {
+ struct rb_node node;
+ ktime_t expires;
+};
+
+struct timerqueue_head {
+ struct rb_root head;
+ struct timerqueue_node *next;
+};
+
+
+extern void timerqueue_add(struct timerqueue_head *head,
+ struct timerqueue_node *node);
+extern void timerqueue_del(struct timerqueue_head *head,
+ struct timerqueue_node *node);
+extern struct timerqueue_node *timerqueue_iterate_next(
+ struct timerqueue_node *node);
+
+/**
+ * timerqueue_getnext - Returns the timer with the earlies expiration time
+ *
+ * @head: head of timerqueue
+ *
+ * Returns a pointer to the timer node that has the
+ * earliest expiration time.
+ */
+static inline
+struct timerqueue_node *timerqueue_getnext(struct timerqueue_head *head)
+{
+ return head->next;
+}
+
+static inline void timerqueue_init(struct timerqueue_node *node)
+{
+ RB_CLEAR_NODE(&node->node);
+}
+
+static inline void timerqueue_init_head(struct timerqueue_head *head)
+{
+ head->head = RB_ROOT;
+ head->next = NULL;
+}
+#endif /* _LINUX_TIMERQUEUE_H */
int state; /* State. */
void (*regfunc)(void);
void (*unregfunc)(void);
- struct tracepoint_func *funcs;
+ struct tracepoint_func __rcu *funcs;
} __attribute__((aligned(32))); /*
* Aligned on 32 bytes because it is
* globally visible and gcc happily
* memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
* __entry->next_pid = next->pid;
* __entry->next_prio = next->prio;
- * )
+ * ),
*
* *
* * Formatted output of a trace record via TP_printk().
.timer = TIMER_INITIALIZER(NULL, 0, 0), \
}
+#define __DEFERRED_WORK_INITIALIZER(n, f) { \
+ .work = __WORK_INITIALIZER((n).work, (f)), \
+ .timer = TIMER_DEFERRED_INITIALIZER(NULL, 0, 0), \
+ }
+
#define DECLARE_WORK(n, f) \
struct work_struct n = __WORK_INITIALIZER(n, f)
#define DECLARE_DELAYED_WORK(n, f) \
struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f)
+#define DECLARE_DEFERRED_WORK(n, f) \
+ struct delayed_work n = __DEFERRED_WORK_INITIALIZER(n, f)
+
/*
* initialize a work item's function pointer
*/
#undef CREATE_TRACE_POINTS
#include <linux/stringify.h>
+/*
+ * module.h includes tracepoints, and because ftrace.h
+ * pulls in module.h:
+ * trace/ftrace.h -> linux/ftrace_event.h -> linux/perf_event.h ->
+ * linux/ftrace.h -> linux/module.h
+ * we must include module.h here before we play with any of
+ * the TRACE_EVENT() macros, otherwise the tracepoints included
+ * by module.h may break the build.
+ */
+#include <linux/module.h>
#undef TRACE_EVENT
#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
TP_fast_assign(
__entry->skbaddr = skb;
- if (skb) {
- __entry->protocol = ntohs(skb->protocol);
- }
+ __entry->protocol = ntohs(skb->protocol);
__entry->location = location;
),
config RCU_TRACE
bool "Enable tracing for RCU"
- depends on TREE_RCU || TREE_PREEMPT_RCU
help
This option provides tracing in RCU which presents stats
in debugfs for debugging RCU implementation.
TREE_PREEMPT_RCU implementations, permitting Makefile to
trivially select kernel/rcutree_trace.c.
+config RCU_BOOST
+ bool "Enable RCU priority boosting"
+ depends on RT_MUTEXES && TINY_PREEMPT_RCU
+ default n
+ help
+ This option boosts the priority of preempted RCU readers that
+ block the current preemptible RCU grace period for too long.
+ This option also prevents heavy loads from blocking RCU
+ callback invocation for all flavors of RCU.
+
+ Say Y here if you are working with real-time apps or heavy loads
+ Say N here if you are unsure.
+
+config RCU_BOOST_PRIO
+ int "Real-time priority to boost RCU readers to"
+ range 1 99
+ depends on RCU_BOOST
+ default 1
+ help
+ This option specifies the real-time priority to which preempted
+ RCU readers are to be boosted. If you are working with CPU-bound
+ real-time applications, you should specify a priority higher then
+ the highest-priority CPU-bound application.
+
+ Specify the real-time priority, or take the default if unsure.
+
+config RCU_BOOST_DELAY
+ int "Milliseconds to delay boosting after RCU grace-period start"
+ range 0 3000
+ depends on RCU_BOOST
+ default 500
+ help
+ This option specifies the time to wait after the beginning of
+ a given grace period before priority-boosting preempted RCU
+ readers blocking that grace period. Note that any RCU reader
+ blocking an expedited RCU grace period is boosted immediately.
+
+ Accept the default if unsure.
+
+config SRCU_SYNCHRONIZE_DELAY
+ int "Microseconds to delay before waiting for readers"
+ range 0 20
+ default 10
+ help
+ This option controls how long SRCU delays before entering its
+ loop waiting on SRCU readers. The purpose of this loop is
+ to avoid the unconditional context-switch penalty that would
+ otherwise be incurred if there was an active SRCU reader,
+ in a manner similar to adaptive locking schemes. This should
+ be set to be a bit longer than the common-case SRCU read-side
+ critical-section overhead.
+
+ Accept the default if unsure.
+
endmenu # "RCU Subsystem"
config IKCONFIG
endif # NAMESPACES
+config SCHED_AUTOGROUP
+ bool "Automatic process group scheduling"
+ select EVENTFD
+ select CGROUPS
+ select CGROUP_SCHED
+ select FAIR_GROUP_SCHED
+ help
+ This option optimizes the scheduler for common desktop workloads by
+ automatically creating and populating task groups. This separation
+ of workloads isolates aggressive CPU burners (like build jobs) from
+ desktop applications. Task group autogeneration is currently based
+ upon task session.
+
config MM_OWNER
bool
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
+obj-$(CONFIG_TRACEPOINTS) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_IRQ_WORK) += irq_work.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o
}
struct take_cpu_down_param {
- struct task_struct *caller;
unsigned long mod;
void *hcpu;
};
static int __ref take_cpu_down(void *_param)
{
struct take_cpu_down_param *param = _param;
- unsigned int cpu = (unsigned long)param->hcpu;
int err;
/* Ensure this CPU doesn't handle any more interrupts. */
cpu_notify(CPU_DYING | param->mod, param->hcpu);
- if (task_cpu(param->caller) == cpu)
- move_task_off_dead_cpu(cpu, param->caller);
- /* Force idle task to run as soon as we yield: it should
- immediately notice cpu is offline and die quickly. */
- sched_idle_next();
return 0;
}
void *hcpu = (void *)(long)cpu;
unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
struct take_cpu_down_param tcd_param = {
- .caller = current,
.mod = mod,
.hcpu = hcpu,
};
}
BUG_ON(cpu_online(cpu));
- /* Wait for it to sleep (leaving idle task). */
+ /*
+ * The migration_call() CPU_DYING callback will have removed all
+ * runnable tasks from the cpu, there's only the idle task left now
+ * that the migration thread is done doing the stop_machine thing.
+ *
+ * Wait for the stop thread to go away.
+ */
while (!idle_cpu(cpu))
- yield();
+ cpu_relax();
/* This actually kills the CPU. */
__cpu_die(cpu);
#ifdef CONFIG_PM_SLEEP_SMP
static cpumask_var_t frozen_cpus;
+void __weak arch_disable_nonboot_cpus_begin(void)
+{
+}
+
+void __weak arch_disable_nonboot_cpus_end(void)
+{
+}
+
int disable_nonboot_cpus(void)
{
int cpu, first_cpu, error = 0;
* with the userspace trying to use the CPU hotplug at the same time
*/
cpumask_clear(frozen_cpus);
+ arch_disable_nonboot_cpus_begin();
printk("Disabling non-boot CPUs ...\n");
for_each_online_cpu(cpu) {
}
}
+ arch_disable_nonboot_cpus_end();
+
if (!error) {
BUG_ON(num_online_cpus() > 1);
/* Make sure the CPUs won't be enabled by someone else */
static inline void put_signal_struct(struct signal_struct *sig)
{
- if (atomic_dec_and_test(&sig->sigcnt))
+ if (atomic_dec_and_test(&sig->sigcnt)) {
+ sched_autogroup_exit(sig);
free_signal_struct(sig);
+ }
}
void __put_task_struct(struct task_struct *tsk)
posix_cpu_timers_init_group(sig);
tty_audit_fork(sig);
+ sched_autogroup_fork(sig);
sig->oom_adj = current->signal->oom_adj;
sig->oom_score_adj = current->signal->oom_score_adj;
}
bad_fork_cleanup_signal:
if (!(clone_flags & CLONE_THREAD))
- free_signal_struct(p->signal);
+ put_signal_struct(p->signal);
bad_fork_cleanup_sighand:
__cleanup_sighand(p->sighand);
bad_fork_cleanup_fs:
#define FUTEX_HASHBITS (CONFIG_BASE_SMALL ? 4 : 8)
+/*
+ * Futex flags used to encode options to functions and preserve them across
+ * restarts.
+ */
+#define FLAGS_SHARED 0x01
+#define FLAGS_CLOCKRT 0x02
+#define FLAGS_HAS_TIMEOUT 0x04
+
/*
* Priority Inheritance state:
*/
u32 bitset;
};
+static const struct futex_q futex_q_init = {
+ /* list gets initialized in queue_me()*/
+ .key = FUTEX_KEY_INIT,
+ .bitset = FUTEX_BITSET_MATCH_ANY
+};
+
/*
* Hash buckets are shared by all the futex_keys that hash to the same
* location. Each key may have multiple futex_q structures, one for each task
return 0;
}
-static inline
-void put_futex_key(int fshared, union futex_key *key)
+static inline void put_futex_key(union futex_key *key)
{
drop_futex_key_refs(key);
}
/*
* Wake up waiters matching bitset queued on this futex (uaddr).
*/
-static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset)
+static int
+futex_wake(u32 __user *uaddr, unsigned int flags, int nr_wake, u32 bitset)
{
struct futex_hash_bucket *hb;
struct futex_q *this, *next;
if (!bitset)
return -EINVAL;
- ret = get_futex_key(uaddr, fshared, &key);
+ ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &key);
if (unlikely(ret != 0))
goto out;
}
spin_unlock(&hb->lock);
- put_futex_key(fshared, &key);
+ put_futex_key(&key);
out:
return ret;
}
* to this virtual address:
*/
static int
-futex_wake_op(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
+futex_wake_op(u32 __user *uaddr1, unsigned int flags, u32 __user *uaddr2,
int nr_wake, int nr_wake2, int op)
{
union futex_key key1 = FUTEX_KEY_INIT, key2 = FUTEX_KEY_INIT;
int ret, op_ret;
retry:
- ret = get_futex_key(uaddr1, fshared, &key1);
+ ret = get_futex_key(uaddr1, flags & FLAGS_SHARED, &key1);
if (unlikely(ret != 0))
goto out;
- ret = get_futex_key(uaddr2, fshared, &key2);
+ ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2);
if (unlikely(ret != 0))
goto out_put_key1;
if (ret)
goto out_put_keys;
- if (!fshared)
+ if (!(flags & FLAGS_SHARED))
goto retry_private;
- put_futex_key(fshared, &key2);
- put_futex_key(fshared, &key1);
+ put_futex_key(&key2);
+ put_futex_key(&key1);
goto retry;
}
double_unlock_hb(hb1, hb2);
out_put_keys:
- put_futex_key(fshared, &key2);
+ put_futex_key(&key2);
out_put_key1:
- put_futex_key(fshared, &key1);
+ put_futex_key(&key1);
out:
return ret;
}
/**
* futex_requeue() - Requeue waiters from uaddr1 to uaddr2
* @uaddr1: source futex user address
- * @fshared: 0 for a PROCESS_PRIVATE futex, 1 for PROCESS_SHARED
+ * @flags: futex flags (FLAGS_SHARED, etc.)
* @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)
* @cmpval: @uaddr1 expected value (or %NULL)
* @requeue_pi: if we are attempting to requeue from a non-pi futex to a
- * pi futex (pi to pi requeue is not supported)
+ * 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.
* >=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 requeue_pi)
+static int futex_requeue(u32 __user *uaddr1, unsigned int flags,
+ u32 __user *uaddr2, 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;
pi_state = NULL;
}
- ret = get_futex_key(uaddr1, fshared, &key1);
+ ret = get_futex_key(uaddr1, flags & FLAGS_SHARED, &key1);
if (unlikely(ret != 0))
goto out;
- ret = get_futex_key(uaddr2, fshared, &key2);
+ ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2);
if (unlikely(ret != 0))
goto out_put_key1;
if (ret)
goto out_put_keys;
- if (!fshared)
+ if (!(flags & FLAGS_SHARED))
goto retry_private;
- put_futex_key(fshared, &key2);
- put_futex_key(fshared, &key1);
+ put_futex_key(&key2);
+ put_futex_key(&key1);
goto retry;
}
if (curval != *cmpval) {
break;
case -EFAULT:
double_unlock_hb(hb1, hb2);
- put_futex_key(fshared, &key2);
- put_futex_key(fshared, &key1);
+ put_futex_key(&key2);
+ put_futex_key(&key1);
ret = fault_in_user_writeable(uaddr2);
if (!ret)
goto retry;
case -EAGAIN:
/* The owner was exiting, try again. */
double_unlock_hb(hb1, hb2);
- put_futex_key(fshared, &key2);
- put_futex_key(fshared, &key1);
+ put_futex_key(&key2);
+ put_futex_key(&key1);
cond_resched();
goto retry;
default:
drop_futex_key_refs(&key1);
out_put_keys:
- put_futex_key(fshared, &key2);
+ put_futex_key(&key2);
out_put_key1:
- put_futex_key(fshared, &key1);
+ put_futex_key(&key1);
out:
if (pi_state != NULL)
free_pi_state(pi_state);
* private futexes.
*/
static int fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q,
- struct task_struct *newowner, int fshared)
+ struct task_struct *newowner)
{
u32 newtid = task_pid_vnr(newowner) | FUTEX_WAITERS;
struct futex_pi_state *pi_state = q->pi_state;
goto retry;
}
-/*
- * In case we must use restart_block to restart a futex_wait,
- * we encode in the 'flags' shared capability
- */
-#define FLAGS_SHARED 0x01
-#define FLAGS_CLOCKRT 0x02
-#define FLAGS_HAS_TIMEOUT 0x04
-
static long futex_wait_restart(struct restart_block *restart);
/**
* 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)
*
* 0 - success, lock not taken
* <0 - on error (-EFAULT)
*/
-static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q,
- int locked)
+static int fixup_owner(u32 __user *uaddr, struct futex_q *q, int locked)
{
struct task_struct *owner;
int ret = 0;
* 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);
+ ret = fixup_pi_state_owner(uaddr, q, current);
goto out;
}
* lock. Fix the state up.
*/
owner = rt_mutex_owner(&q->pi_state->pi_mutex);
- ret = fixup_pi_state_owner(uaddr, q, owner, fshared);
+ ret = fixup_pi_state_owner(uaddr, q, owner);
goto out;
}
* 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)
+ * @flags: futex flags (FLAGS_SHARED, etc.)
* @q: the associated futex_q
* @hb: storage for hash_bucket pointer to be returned to caller
*
* 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,
+static int futex_wait_setup(u32 __user *uaddr, u32 val, unsigned int flags,
struct futex_q *q, struct futex_hash_bucket **hb)
{
u32 uval;
* rare, but normal.
*/
retry:
- q->key = FUTEX_KEY_INIT;
- ret = get_futex_key(uaddr, fshared, &q->key);
+ ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &q->key);
if (unlikely(ret != 0))
return ret;
if (ret)
goto out;
- if (!fshared)
+ if (!(flags & FLAGS_SHARED))
goto retry_private;
- put_futex_key(fshared, &q->key);
+ put_futex_key(&q->key);
goto retry;
}
out:
if (ret)
- put_futex_key(fshared, &q->key);
+ put_futex_key(&q->key);
return ret;
}
-static int futex_wait(u32 __user *uaddr, int fshared,
- u32 val, ktime_t *abs_time, u32 bitset, int clockrt)
+static int futex_wait(u32 __user *uaddr, unsigned int flags, u32 val,
+ ktime_t *abs_time, u32 bitset)
{
struct hrtimer_sleeper timeout, *to = NULL;
struct restart_block *restart;
struct futex_hash_bucket *hb;
- struct futex_q q;
+ struct futex_q q = futex_q_init;
int ret;
if (!bitset)
return -EINVAL;
-
- q.pi_state = NULL;
q.bitset = bitset;
- q.rt_waiter = NULL;
- q.requeue_pi_key = NULL;
if (abs_time) {
to = &timeout;
- hrtimer_init_on_stack(&to->timer, clockrt ? CLOCK_REALTIME :
- CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ hrtimer_init_on_stack(&to->timer, (flags & FLAGS_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);
* Prepare to wait on uaddr. On success, holds hb lock and increments
* q.key refs.
*/
- ret = futex_wait_setup(uaddr, val, fshared, &q, &hb);
+ ret = futex_wait_setup(uaddr, val, flags, &q, &hb);
if (ret)
goto out;
restart->futex.val = val;
restart->futex.time = abs_time->tv64;
restart->futex.bitset = bitset;
- restart->futex.flags = FLAGS_HAS_TIMEOUT;
-
- if (fshared)
- restart->futex.flags |= FLAGS_SHARED;
- if (clockrt)
- restart->futex.flags |= FLAGS_CLOCKRT;
+ restart->futex.flags = flags;
ret = -ERESTART_RESTARTBLOCK;
static long futex_wait_restart(struct restart_block *restart)
{
u32 __user *uaddr = restart->futex.uaddr;
- int fshared = 0;
ktime_t t, *tp = NULL;
if (restart->futex.flags & FLAGS_HAS_TIMEOUT) {
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, tp,
- restart->futex.bitset,
- restart->futex.flags & FLAGS_CLOCKRT);
+
+ return (long)futex_wait(uaddr, restart->futex.flags,
+ restart->futex.val, tp, restart->futex.bitset);
}
* if there are waiters then it will block, it does PI, etc. (Due to
* races the kernel might see a 0 value of the futex too.)
*/
-static int futex_lock_pi(u32 __user *uaddr, int fshared,
- int detect, ktime_t *time, int trylock)
+static int futex_lock_pi(u32 __user *uaddr, unsigned int flags, int detect,
+ ktime_t *time, int trylock)
{
struct hrtimer_sleeper timeout, *to = NULL;
struct futex_hash_bucket *hb;
- struct futex_q q;
+ struct futex_q q = futex_q_init;
int res, ret;
if (refill_pi_state_cache())
hrtimer_set_expires(&to->timer, *time);
}
- q.pi_state = NULL;
- q.rt_waiter = NULL;
- q.requeue_pi_key = NULL;
retry:
- q.key = FUTEX_KEY_INIT;
- ret = get_futex_key(uaddr, fshared, &q.key);
+ ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &q.key);
if (unlikely(ret != 0))
goto out;
* exit to complete.
*/
queue_unlock(&q, hb);
- put_futex_key(fshared, &q.key);
+ put_futex_key(&q.key);
cond_resched();
goto retry;
default:
* Fixup the pi_state owner and possibly acquire the lock if we
* haven't already.
*/
- res = fixup_owner(uaddr, fshared, &q, !ret);
+ res = fixup_owner(uaddr, &q, !ret);
/*
* If fixup_owner() returned an error, proprogate that. If it acquired
* the lock, clear our -ETIMEDOUT or -EINTR.
queue_unlock(&q, hb);
out_put_key:
- put_futex_key(fshared, &q.key);
+ put_futex_key(&q.key);
out:
if (to)
destroy_hrtimer_on_stack(&to->timer);
if (ret)
goto out_put_key;
- if (!fshared)
+ if (!(flags & FLAGS_SHARED))
goto retry_private;
- put_futex_key(fshared, &q.key);
+ put_futex_key(&q.key);
goto retry;
}
* This is the in-kernel slowpath: we look up the PI state (if any),
* and do the rt-mutex unlock.
*/
-static int futex_unlock_pi(u32 __user *uaddr, int fshared)
+static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
{
struct futex_hash_bucket *hb;
struct futex_q *this, *next;
if ((uval & FUTEX_TID_MASK) != task_pid_vnr(current))
return -EPERM;
- ret = get_futex_key(uaddr, fshared, &key);
+ ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &key);
if (unlikely(ret != 0))
goto out;
out_unlock:
spin_unlock(&hb->lock);
- put_futex_key(fshared, &key);
+ put_futex_key(&key);
out:
return ret;
pi_faulted:
spin_unlock(&hb->lock);
- put_futex_key(fshared, &key);
+ put_futex_key(&key);
ret = fault_in_user_writeable(uaddr);
if (!ret)
/**
* futex_wait_requeue_pi() - Wait on uaddr and take uaddr2
* @uaddr: the futex we initially wait on (non-pi)
- * @fshared: whether the futexes are shared (1) or not (0). They must be
+ * @flags: futex flags (FLAGS_SHARED, FLAGS_CLOCKRT, etc.), they must be
* the same type, no requeueing from private to shared, etc.
* @val: the expected value of uaddr
* @abs_time: absolute timeout
* 0 - On success
* <0 - On error
*/
-static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared,
+static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
u32 val, ktime_t *abs_time, u32 bitset,
- int clockrt, u32 __user *uaddr2)
+ 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;
+ union futex_key key2 = FUTEX_KEY_INIT;
+ struct futex_q q = futex_q_init;
int res, ret;
if (!bitset)
if (abs_time) {
to = &timeout;
- hrtimer_init_on_stack(&to->timer, clockrt ? CLOCK_REALTIME :
- CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ hrtimer_init_on_stack(&to->timer, (flags & FLAGS_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);
debug_rt_mutex_init_waiter(&rt_waiter);
rt_waiter.task = NULL;
- key2 = FUTEX_KEY_INIT;
- ret = get_futex_key(uaddr2, fshared, &key2);
+ ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2);
if (unlikely(ret != 0))
goto out;
- q.pi_state = NULL;
q.bitset = bitset;
q.rt_waiter = &rt_waiter;
q.requeue_pi_key = &key2;
* Prepare to wait on uaddr. On success, increments q.key (key1) ref
* count.
*/
- ret = futex_wait_setup(uaddr, val, fshared, &q, &hb);
+ ret = futex_wait_setup(uaddr, val, flags, &q, &hb);
if (ret)
goto out_key2;
*/
if (q.pi_state && (q.pi_state->owner != current)) {
spin_lock(q.lock_ptr);
- ret = fixup_pi_state_owner(uaddr2, &q, current,
- fshared);
+ ret = fixup_pi_state_owner(uaddr2, &q, current);
spin_unlock(q.lock_ptr);
}
} else {
* Fixup the pi_state owner and possibly acquire the lock if we
* haven't already.
*/
- res = fixup_owner(uaddr2, fshared, &q, !ret);
+ res = fixup_owner(uaddr2, &q, !ret);
/*
* If fixup_owner() returned an error, proprogate that. If it
* acquired the lock, clear -ETIMEDOUT or -EINTR.
}
out_put_keys:
- put_futex_key(fshared, &q.key);
+ put_futex_key(&q.key);
out_key2:
- put_futex_key(fshared, &key2);
+ put_futex_key(&key2);
out:
if (to) {
long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
u32 __user *uaddr2, u32 val2, u32 val3)
{
- int clockrt, ret = -ENOSYS;
- int cmd = op & FUTEX_CMD_MASK;
- int fshared = 0;
+ int ret = -ENOSYS, cmd = op & FUTEX_CMD_MASK;
+ unsigned int flags = 0;
if (!(op & FUTEX_PRIVATE_FLAG))
- fshared = 1;
+ flags |= FLAGS_SHARED;
- clockrt = op & FUTEX_CLOCK_REALTIME;
- if (clockrt && cmd != FUTEX_WAIT_BITSET && cmd != FUTEX_WAIT_REQUEUE_PI)
- return -ENOSYS;
+ if (op & FUTEX_CLOCK_REALTIME) {
+ flags |= FLAGS_CLOCKRT;
+ if (cmd != FUTEX_WAIT_BITSET && cmd != FUTEX_WAIT_REQUEUE_PI)
+ return -ENOSYS;
+ }
switch (cmd) {
case FUTEX_WAIT:
val3 = FUTEX_BITSET_MATCH_ANY;
case FUTEX_WAIT_BITSET:
- ret = futex_wait(uaddr, fshared, val, timeout, val3, clockrt);
+ ret = futex_wait(uaddr, flags, val, timeout, val3);
break;
case FUTEX_WAKE:
val3 = FUTEX_BITSET_MATCH_ANY;
case FUTEX_WAKE_BITSET:
- ret = futex_wake(uaddr, fshared, val, val3);
+ ret = futex_wake(uaddr, flags, val, val3);
break;
case FUTEX_REQUEUE:
- ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, NULL, 0);
+ ret = futex_requeue(uaddr, flags, uaddr2, val, val2, NULL, 0);
break;
case FUTEX_CMP_REQUEUE:
- ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, &val3,
- 0);
+ ret = futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 0);
break;
case FUTEX_WAKE_OP:
- ret = futex_wake_op(uaddr, fshared, uaddr2, val, val2, val3);
+ ret = futex_wake_op(uaddr, flags, uaddr2, val, val2, val3);
break;
case FUTEX_LOCK_PI:
if (futex_cmpxchg_enabled)
- ret = futex_lock_pi(uaddr, fshared, val, timeout, 0);
+ ret = futex_lock_pi(uaddr, flags, val, timeout, 0);
break;
case FUTEX_UNLOCK_PI:
if (futex_cmpxchg_enabled)
- ret = futex_unlock_pi(uaddr, fshared);
+ ret = futex_unlock_pi(uaddr, flags);
break;
case FUTEX_TRYLOCK_PI:
if (futex_cmpxchg_enabled)
- ret = futex_lock_pi(uaddr, fshared, 0, timeout, 1);
+ ret = futex_lock_pi(uaddr, flags, 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);
+ ret = futex_wait_requeue_pi(uaddr, flags, val, timeout, val3,
+ uaddr2);
break;
case FUTEX_CMP_REQUEUE_PI:
- ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, &val3,
- 1);
+ ret = futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 1);
break;
default:
ret = -ENOSYS;
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
struct hrtimer *timer;
+ struct timerqueue_node *next;
- if (!base->first)
+ next = timerqueue_getnext(&base->active);
+ if (!next)
continue;
- timer = rb_entry(base->first, struct hrtimer, node);
+ timer = container_of(next, struct hrtimer, node);
+
expires = ktime_sub(hrtimer_get_expires(timer), base->offset);
/*
* clock_was_set() has changed base->offset so the
static int enqueue_hrtimer(struct hrtimer *timer,
struct hrtimer_clock_base *base)
{
- struct rb_node **link = &base->active.rb_node;
- struct rb_node *parent = NULL;
- struct hrtimer *entry;
- int leftmost = 1;
-
debug_activate(timer);
- /*
- * Find the right place in the rbtree:
- */
- while (*link) {
- parent = *link;
- entry = rb_entry(parent, struct hrtimer, node);
- /*
- * We dont care about collisions. Nodes with
- * the same expiry time stay together.
- */
- if (hrtimer_get_expires_tv64(timer) <
- hrtimer_get_expires_tv64(entry)) {
- link = &(*link)->rb_left;
- } else {
- link = &(*link)->rb_right;
- leftmost = 0;
- }
- }
-
- /*
- * Insert the timer to the rbtree and check whether it
- * replaces the first pending timer
- */
- if (leftmost)
- base->first = &timer->node;
+ timerqueue_add(&base->active, &timer->node);
- rb_link_node(&timer->node, parent, link);
- rb_insert_color(&timer->node, &base->active);
/*
* HRTIMER_STATE_ENQUEUED is or'ed to the current state to preserve the
* state of a possibly running callback.
*/
timer->state |= HRTIMER_STATE_ENQUEUED;
- return leftmost;
+ return (&timer->node == base->active.next);
}
/*
if (!(timer->state & HRTIMER_STATE_ENQUEUED))
goto out;
- /*
- * Remove the timer from the rbtree and replace the first
- * entry pointer if necessary.
- */
- if (base->first == &timer->node) {
- base->first = rb_next(&timer->node);
+ if (&timer->node == timerqueue_getnext(&base->active)) {
#ifdef CONFIG_HIGH_RES_TIMERS
/* Reprogram the clock event device. if enabled */
if (reprogram && hrtimer_hres_active()) {
}
#endif
}
- rb_erase(&timer->node, &base->active);
+ timerqueue_del(&base->active, &timer->node);
out:
timer->state = newstate;
}
if (!hrtimer_hres_active()) {
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
struct hrtimer *timer;
+ struct timerqueue_node *next;
- if (!base->first)
+ next = timerqueue_getnext(&base->active);
+ if (!next)
continue;
- timer = rb_entry(base->first, struct hrtimer, node);
+ timer = container_of(next, struct hrtimer, node);
delta.tv64 = hrtimer_get_expires_tv64(timer);
delta = ktime_sub(delta, base->get_time());
if (delta.tv64 < mindelta.tv64)
timer->base = &cpu_base->clock_base[clock_id];
hrtimer_init_timer_hres(timer);
+ timerqueue_init(&timer->node);
#ifdef CONFIG_TIMER_STATS
timer->start_site = NULL;
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
ktime_t basenow;
- struct rb_node *node;
+ struct timerqueue_node *node;
basenow = ktime_add(now, base->offset);
- while ((node = base->first)) {
+ while ((node = timerqueue_getnext(&base->active))) {
struct hrtimer *timer;
- timer = rb_entry(node, struct hrtimer, node);
+ timer = container_of(node, struct hrtimer, node);
/*
* The immediate goal for using the softexpires is
*/
void hrtimer_run_queues(void)
{
- struct rb_node *node;
+ struct timerqueue_node *node;
struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
struct hrtimer_clock_base *base;
int index, gettime = 1;
for (index = 0; index < HRTIMER_MAX_CLOCK_BASES; index++) {
base = &cpu_base->clock_base[index];
-
- if (!base->first)
+ if (!timerqueue_getnext(&base->active))
continue;
if (gettime) {
raw_spin_lock(&cpu_base->lock);
- while ((node = base->first)) {
+ while ((node = timerqueue_getnext(&base->active))) {
struct hrtimer *timer;
- timer = rb_entry(node, struct hrtimer, node);
+ timer = container_of(node, struct hrtimer, node);
if (base->softirq_time.tv64 <=
hrtimer_get_expires_tv64(timer))
break;
raw_spin_lock_init(&cpu_base->lock);
- for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++)
+ for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
cpu_base->clock_base[i].cpu_base = cpu_base;
+ timerqueue_init_head(&cpu_base->clock_base[i].active);
+ }
hrtimer_init_hres(cpu_base);
}
struct hrtimer_clock_base *new_base)
{
struct hrtimer *timer;
- struct rb_node *node;
+ struct timerqueue_node *node;
- while ((node = rb_first(&old_base->active))) {
- timer = rb_entry(node, struct hrtimer, node);
+ while ((node = timerqueue_getnext(&old_base->active))) {
+ timer = container_of(node, struct hrtimer, node);
BUG_ON(hrtimer_callback_running(timer));
debug_deactivate(timer);
*/
static int irq_thread(void *data)
{
- struct sched_param param = { .sched_priority = MAX_USER_RT_PRIO/2, };
+ static struct sched_param param = {
+ .sched_priority = MAX_USER_RT_PRIO/2,
+ };
struct irqaction *action = data;
struct irq_desc *desc = irq_to_desc(action->irq);
int wake, oneshot = desc->status & IRQ_ONESHOT;
wait_for_completion(&create.done);
if (!IS_ERR(create.result)) {
- struct sched_param param = { .sched_priority = 0 };
+ static struct sched_param param = { .sched_priority = 0 };
va_list args;
va_start(args, namefmt);
namelen += 2;
for (i = 0; i < LOCKSTAT_POINTS; i++) {
- char sym[KSYM_SYMBOL_LEN];
char ip[32];
if (class->contention_point[i] == 0)
if (!i)
seq_line(m, '-', 40-namelen, namelen);
- sprint_symbol(sym, class->contention_point[i]);
snprintf(ip, sizeof(ip), "[<%p>]",
(void *)class->contention_point[i]);
- seq_printf(m, "%40s %14lu %29s %s\n", name,
- stats->contention_point[i],
- ip, sym);
+ seq_printf(m, "%40s %14lu %29s %pS\n",
+ name, stats->contention_point[i],
+ ip, (void *)class->contention_point[i]);
}
for (i = 0; i < LOCKSTAT_POINTS; i++) {
- char sym[KSYM_SYMBOL_LEN];
char ip[32];
if (class->contending_point[i] == 0)
if (!i)
seq_line(m, '-', 40-namelen, namelen);
- sprint_symbol(sym, class->contending_point[i]);
snprintf(ip, sizeof(ip), "[<%p>]",
(void *)class->contending_point[i]);
- seq_printf(m, "%40s %14lu %29s %s\n", name,
- stats->contending_point[i],
- ip, sym);
+ seq_printf(m, "%40s %14lu %29s %pS\n",
+ name, stats->contending_point[i],
+ ip, (void *)class->contending_point[i]);
}
if (i) {
seq_puts(m, "\n");
#include <linux/percpu.h>
#include <linux/kmemleak.h>
#include <linux/jump_label.h>
+#include <linux/pfn.h>
#define CREATE_TRACE_POINTS
#include <trace/events/module.h>
#define ARCH_SHF_SMALL 0
#endif
+/*
+ * Modules' sections will be aligned on page boundaries
+ * to ensure complete separation of code and data, but
+ * only when CONFIG_DEBUG_SET_MODULE_RONX=y
+ */
+#ifdef CONFIG_DEBUG_SET_MODULE_RONX
+# define debug_align(X) ALIGN(X, PAGE_SIZE)
+#else
+# define debug_align(X) (X)
+#endif
+
+/*
+ * Given BASE and SIZE this macro calculates the number of pages the
+ * memory regions occupies
+ */
+#define MOD_NUMBER_OF_PAGES(BASE, SIZE) (((SIZE) > 0) ? \
+ (PFN_DOWN((unsigned long)(BASE) + (SIZE) - 1) - \
+ PFN_DOWN((unsigned long)BASE) + 1) \
+ : (0UL))
+
/* If this is set, the section belongs in the init part of the module */
#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
return 0;
}
+#ifdef CONFIG_DEBUG_SET_MODULE_RONX
+/*
+ * LKM RO/NX protection: protect module's text/ro-data
+ * from modification and any data from execution.
+ */
+void set_page_attributes(void *start, void *end, int (*set)(unsigned long start, int num_pages))
+{
+ unsigned long begin_pfn = PFN_DOWN((unsigned long)start);
+ unsigned long end_pfn = PFN_DOWN((unsigned long)end);
+
+ if (end_pfn > begin_pfn)
+ set(begin_pfn << PAGE_SHIFT, end_pfn - begin_pfn);
+}
+
+static void set_section_ro_nx(void *base,
+ unsigned long text_size,
+ unsigned long ro_size,
+ unsigned long total_size)
+{
+ /* begin and end PFNs of the current subsection */
+ unsigned long begin_pfn;
+ unsigned long end_pfn;
+
+ /*
+ * Set RO for module text and RO-data:
+ * - Always protect first page.
+ * - Do not protect last partial page.
+ */
+ if (ro_size > 0)
+ set_page_attributes(base, base + ro_size, set_memory_ro);
+
+ /*
+ * Set NX permissions for module data:
+ * - Do not protect first partial page.
+ * - Always protect last page.
+ */
+ if (total_size > text_size) {
+ begin_pfn = PFN_UP((unsigned long)base + text_size);
+ end_pfn = PFN_UP((unsigned long)base + total_size);
+ if (end_pfn > begin_pfn)
+ set_memory_nx(begin_pfn << PAGE_SHIFT, end_pfn - begin_pfn);
+ }
+}
+
+/* Setting memory back to RW+NX before releasing it */
+void unset_section_ro_nx(struct module *mod, void *module_region)
+{
+ unsigned long total_pages;
+
+ if (mod->module_core == module_region) {
+ /* Set core as NX+RW */
+ total_pages = MOD_NUMBER_OF_PAGES(mod->module_core, mod->core_size);
+ set_memory_nx((unsigned long)mod->module_core, total_pages);
+ set_memory_rw((unsigned long)mod->module_core, total_pages);
+
+ } else if (mod->module_init == module_region) {
+ /* Set init as NX+RW */
+ total_pages = MOD_NUMBER_OF_PAGES(mod->module_init, mod->init_size);
+ set_memory_nx((unsigned long)mod->module_init, total_pages);
+ set_memory_rw((unsigned long)mod->module_init, total_pages);
+ }
+}
+
+/* Iterate through all modules and set each module's text as RW */
+void set_all_modules_text_rw()
+{
+ struct module *mod;
+
+ mutex_lock(&module_mutex);
+ list_for_each_entry_rcu(mod, &modules, list) {
+ if ((mod->module_core) && (mod->core_text_size)) {
+ set_page_attributes(mod->module_core,
+ mod->module_core + mod->core_text_size,
+ set_memory_rw);
+ }
+ if ((mod->module_init) && (mod->init_text_size)) {
+ set_page_attributes(mod->module_init,
+ mod->module_init + mod->init_text_size,
+ set_memory_rw);
+ }
+ }
+ mutex_unlock(&module_mutex);
+}
+
+/* Iterate through all modules and set each module's text as RO */
+void set_all_modules_text_ro()
+{
+ struct module *mod;
+
+ mutex_lock(&module_mutex);
+ list_for_each_entry_rcu(mod, &modules, list) {
+ if ((mod->module_core) && (mod->core_text_size)) {
+ set_page_attributes(mod->module_core,
+ mod->module_core + mod->core_text_size,
+ set_memory_ro);
+ }
+ if ((mod->module_init) && (mod->init_text_size)) {
+ set_page_attributes(mod->module_init,
+ mod->module_init + mod->init_text_size,
+ set_memory_ro);
+ }
+ }
+ mutex_unlock(&module_mutex);
+}
+#else
+static inline void set_section_ro_nx(void *base, unsigned long text_size, unsigned long ro_size, unsigned long total_size) { }
+static inline void unset_section_ro_nx(struct module *mod, void *module_region) { }
+#endif
+
/* Free a module, remove from lists, etc. */
static void free_module(struct module *mod)
{
destroy_params(mod->kp, mod->num_kp);
/* This may be NULL, but that's OK */
+ unset_section_ro_nx(mod, mod->module_init);
module_free(mod, mod->module_init);
kfree(mod->args);
percpu_modfree(mod);
lockdep_free_key_range(mod->module_core, mod->core_size);
/* Finally, free the core (containing the module structure) */
+ unset_section_ro_nx(mod, mod->module_core);
module_free(mod, mod->module_core);
#ifdef CONFIG_MPU
s->sh_entsize = get_offset(mod, &mod->core_size, s, i);
DEBUGP("\t%s\n", name);
}
- if (m == 0)
+ switch (m) {
+ case 0: /* executable */
+ mod->core_size = debug_align(mod->core_size);
mod->core_text_size = mod->core_size;
+ break;
+ case 1: /* RO: text and ro-data */
+ mod->core_size = debug_align(mod->core_size);
+ mod->core_ro_size = mod->core_size;
+ break;
+ case 3: /* whole core */
+ mod->core_size = debug_align(mod->core_size);
+ break;
+ }
}
DEBUGP("Init section allocation order:\n");
| INIT_OFFSET_MASK);
DEBUGP("\t%s\n", sname);
}
- if (m == 0)
+ switch (m) {
+ case 0: /* executable */
+ mod->init_size = debug_align(mod->init_size);
mod->init_text_size = mod->init_size;
+ break;
+ case 1: /* RO: text and ro-data */
+ mod->init_size = debug_align(mod->init_size);
+ mod->init_ro_size = mod->init_size;
+ break;
+ case 3: /* whole init */
+ mod->init_size = debug_align(mod->init_size);
+ break;
+ }
}
}
blocking_notifier_call_chain(&module_notify_list,
MODULE_STATE_COMING, mod);
+ /* Set RO and NX regions for core */
+ set_section_ro_nx(mod->module_core,
+ mod->core_text_size,
+ mod->core_ro_size,
+ mod->core_size);
+
+ /* Set RO and NX regions for init */
+ set_section_ro_nx(mod->module_init,
+ mod->init_text_size,
+ mod->init_ro_size,
+ mod->init_size);
+
do_mod_ctors(mod);
/* Start the module */
if (mod->init != NULL)
mod->symtab = mod->core_symtab;
mod->strtab = mod->core_strtab;
#endif
+ unset_section_ro_nx(mod, mod->module_init);
module_free(mod, mod->module_init);
mod->module_init = NULL;
mod->init_size = 0;
* memory barriers as we'll eventually observe the right
* values at the cost of a few extra spins.
*/
- cpu_relax();
+ arch_mutex_cpu_relax();
}
#endif
spin_lock_mutex(&lock->wait_lock, flags);
static enum hrtimer_restart posix_timer_fn(struct hrtimer *data);
-static struct k_itimer *lock_timer(timer_t timer_id, unsigned long *flags);
+static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags);
+
+#define lock_timer(tid, flags) \
+({ struct k_itimer *__timr; \
+ __cond_lock(&__timr->it_lock, __timr = __lock_timer(tid, flags)); \
+ __timr; \
+})
static inline void unlock_timer(struct k_itimer *timr, unsigned long flags)
{
* the find to the timer lock. To avoid a dead lock, the timer id MUST
* be release with out holding the timer lock.
*/
-static struct k_itimer *lock_timer(timer_t timer_id, unsigned long *flags)
+static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags)
{
struct k_itimer *timr;
/*
void printk_tick(void)
{
- if (__get_cpu_var(printk_pending)) {
- __get_cpu_var(printk_pending) = 0;
+ if (__this_cpu_read(printk_pending)) {
+ __this_cpu_write(printk_pending, 0);
wake_up_interruptible(&log_wait);
}
}
int printk_needs_cpu(int cpu)
{
- if (unlikely(cpu_is_offline(cpu)))
+ if (cpu_is_offline(cpu))
printk_tick();
- return per_cpu(printk_pending, cpu);
+ return __this_cpu_read(printk_pending);
}
void wake_up_klogd(void)
#include <linux/time.h>
#include <linux/cpu.h>
-/* Global control variables for rcupdate callback mechanism. */
-struct rcu_ctrlblk {
- struct rcu_head *rcucblist; /* List of pending callbacks (CBs). */
- struct rcu_head **donetail; /* ->next pointer of last "done" CB. */
- struct rcu_head **curtail; /* ->next pointer of last CB. */
-};
-
-/* Definition for rcupdate control block. */
-static struct rcu_ctrlblk rcu_sched_ctrlblk = {
- .donetail = &rcu_sched_ctrlblk.rcucblist,
- .curtail = &rcu_sched_ctrlblk.rcucblist,
-};
-
-static struct rcu_ctrlblk rcu_bh_ctrlblk = {
- .donetail = &rcu_bh_ctrlblk.rcucblist,
- .curtail = &rcu_bh_ctrlblk.rcucblist,
-};
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-int rcu_scheduler_active __read_mostly;
-EXPORT_SYMBOL_GPL(rcu_scheduler_active);
-#endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
+/* Controls for rcu_kthread() kthread, replacing RCU_SOFTIRQ used previously. */
+static struct task_struct *rcu_kthread_task;
+static DECLARE_WAIT_QUEUE_HEAD(rcu_kthread_wq);
+static unsigned long have_rcu_kthread_work;
+static void invoke_rcu_kthread(void);
/* Forward declarations for rcutiny_plugin.h. */
-static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp);
+struct rcu_ctrlblk;
+static void rcu_process_callbacks(struct rcu_ctrlblk *rcp);
+static int rcu_kthread(void *arg);
static void __call_rcu(struct rcu_head *head,
void (*func)(struct rcu_head *rcu),
struct rcu_ctrlblk *rcp);
{
if (rcu_qsctr_help(&rcu_sched_ctrlblk) +
rcu_qsctr_help(&rcu_bh_ctrlblk))
- raise_softirq(RCU_SOFTIRQ);
+ invoke_rcu_kthread();
}
/*
void rcu_bh_qs(int cpu)
{
if (rcu_qsctr_help(&rcu_bh_ctrlblk))
- raise_softirq(RCU_SOFTIRQ);
+ invoke_rcu_kthread();
}
/*
}
/*
- * Helper function for rcu_process_callbacks() that operates on the
- * specified rcu_ctrlkblk structure.
+ * Invoke the RCU callbacks on the specified rcu_ctrlkblk structure
+ * whose grace period has elapsed.
*/
-static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
+static void rcu_process_callbacks(struct rcu_ctrlblk *rcp)
{
struct rcu_head *next, *list;
unsigned long flags;
+ RCU_TRACE(int cb_count = 0);
/* If no RCU callbacks ready to invoke, just return. */
if (&rcp->rcucblist == rcp->donetail)
next = list->next;
prefetch(next);
debug_rcu_head_unqueue(list);
+ local_bh_disable();
list->func(list);
+ local_bh_enable();
list = next;
+ RCU_TRACE(cb_count++);
}
+ RCU_TRACE(rcu_trace_sub_qlen(rcp, cb_count));
}
/*
- * Invoke any callbacks whose grace period has completed.
+ * This kthread invokes RCU callbacks whose grace periods have
+ * elapsed. It is awakened as needed, and takes the place of the
+ * RCU_SOFTIRQ that was used previously for this purpose.
+ * This is a kthread, but it is never stopped, at least not until
+ * the system goes down.
*/
-static void rcu_process_callbacks(struct softirq_action *unused)
+static int rcu_kthread(void *arg)
{
- __rcu_process_callbacks(&rcu_sched_ctrlblk);
- __rcu_process_callbacks(&rcu_bh_ctrlblk);
- rcu_preempt_process_callbacks();
+ unsigned long work;
+ unsigned long morework;
+ unsigned long flags;
+
+ for (;;) {
+ wait_event(rcu_kthread_wq, have_rcu_kthread_work != 0);
+ morework = rcu_boost();
+ local_irq_save(flags);
+ work = have_rcu_kthread_work;
+ have_rcu_kthread_work = morework;
+ local_irq_restore(flags);
+ if (work) {
+ rcu_process_callbacks(&rcu_sched_ctrlblk);
+ rcu_process_callbacks(&rcu_bh_ctrlblk);
+ rcu_preempt_process_callbacks();
+ }
+ schedule_timeout_interruptible(1); /* Leave CPU for others. */
+ }
+
+ return 0; /* Not reached, but needed to shut gcc up. */
+}
+
+/*
+ * Wake up rcu_kthread() to process callbacks now eligible for invocation
+ * or to boost readers.
+ */
+static void invoke_rcu_kthread(void)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ have_rcu_kthread_work = 1;
+ wake_up(&rcu_kthread_wq);
+ local_irq_restore(flags);
}
/*
local_irq_save(flags);
*rcp->curtail = head;
rcp->curtail = &head->next;
+ RCU_TRACE(rcp->qlen++);
local_irq_restore(flags);
}
}
EXPORT_SYMBOL_GPL(rcu_barrier_sched);
-void __init rcu_init(void)
+/*
+ * Spawn the kthread that invokes RCU callbacks.
+ */
+static int __init rcu_spawn_kthreads(void)
{
- open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
+ struct sched_param sp;
+
+ rcu_kthread_task = kthread_run(rcu_kthread, NULL, "rcu_kthread");
+ sp.sched_priority = RCU_BOOST_PRIO;
+ sched_setscheduler_nocheck(rcu_kthread_task, SCHED_FIFO, &sp);
+ return 0;
}
+early_initcall(rcu_spawn_kthreads);
* Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
*/
+#include <linux/kthread.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#ifdef CONFIG_RCU_TRACE
+#define RCU_TRACE(stmt) stmt
+#else /* #ifdef CONFIG_RCU_TRACE */
+#define RCU_TRACE(stmt)
+#endif /* #else #ifdef CONFIG_RCU_TRACE */
+
+/* Global control variables for rcupdate callback mechanism. */
+struct rcu_ctrlblk {
+ struct rcu_head *rcucblist; /* List of pending callbacks (CBs). */
+ struct rcu_head **donetail; /* ->next pointer of last "done" CB. */
+ struct rcu_head **curtail; /* ->next pointer of last CB. */
+ RCU_TRACE(long qlen); /* Number of pending CBs. */
+};
+
+/* Definition for rcupdate control block. */
+static struct rcu_ctrlblk rcu_sched_ctrlblk = {
+ .donetail = &rcu_sched_ctrlblk.rcucblist,
+ .curtail = &rcu_sched_ctrlblk.rcucblist,
+};
+
+static struct rcu_ctrlblk rcu_bh_ctrlblk = {
+ .donetail = &rcu_bh_ctrlblk.rcucblist,
+ .curtail = &rcu_bh_ctrlblk.rcucblist,
+};
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+int rcu_scheduler_active __read_mostly;
+EXPORT_SYMBOL_GPL(rcu_scheduler_active);
+#endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
+
#ifdef CONFIG_TINY_PREEMPT_RCU
#include <linux/delay.h>
struct list_head *gp_tasks;
/* Pointer to the first task blocking the */
/* current grace period, or NULL if there */
- /* is not such task. */
+ /* is no such task. */
struct list_head *exp_tasks;
/* Pointer to first task blocking the */
/* current expedited grace period, or NULL */
/* if there is no such task. If there */
/* is no current expedited grace period, */
/* then there cannot be any such task. */
+#ifdef CONFIG_RCU_BOOST
+ struct list_head *boost_tasks;
+ /* Pointer to first task that needs to be */
+ /* priority-boosted, or NULL if no priority */
+ /* boosting is needed. If there is no */
+ /* current or expedited grace period, there */
+ /* can be no such task. */
+#endif /* #ifdef CONFIG_RCU_BOOST */
u8 gpnum; /* Current grace period. */
u8 gpcpu; /* Last grace period blocked by the CPU. */
u8 completed; /* Last grace period completed. */
/* If all three are equal, RCU is idle. */
+#ifdef CONFIG_RCU_BOOST
+ s8 boosted_this_gp; /* Has boosting already happened? */
+ unsigned long boost_time; /* When to start boosting (jiffies) */
+#endif /* #ifdef CONFIG_RCU_BOOST */
+#ifdef CONFIG_RCU_TRACE
+ unsigned long n_grace_periods;
+#ifdef CONFIG_RCU_BOOST
+ unsigned long n_tasks_boosted;
+ unsigned long n_exp_boosts;
+ unsigned long n_normal_boosts;
+ unsigned long n_normal_balk_blkd_tasks;
+ unsigned long n_normal_balk_gp_tasks;
+ unsigned long n_normal_balk_boost_tasks;
+ unsigned long n_normal_balk_boosted;
+ unsigned long n_normal_balk_notyet;
+ unsigned long n_normal_balk_nos;
+ unsigned long n_exp_balk_blkd_tasks;
+ unsigned long n_exp_balk_nos;
+#endif /* #ifdef CONFIG_RCU_BOOST */
+#endif /* #ifdef CONFIG_RCU_TRACE */
};
static struct rcu_preempt_ctrlblk rcu_preempt_ctrlblk = {
return rcu_preempt_ctrlblk.completed != rcu_preempt_ctrlblk.gpnum;
}
+/*
+ * Advance a ->blkd_tasks-list pointer to the next entry, instead
+ * returning NULL if at the end of the list.
+ */
+static struct list_head *rcu_next_node_entry(struct task_struct *t)
+{
+ struct list_head *np;
+
+ np = t->rcu_node_entry.next;
+ if (np == &rcu_preempt_ctrlblk.blkd_tasks)
+ np = NULL;
+ return np;
+}
+
+#ifdef CONFIG_RCU_TRACE
+
+#ifdef CONFIG_RCU_BOOST
+static void rcu_initiate_boost_trace(void);
+static void rcu_initiate_exp_boost_trace(void);
+#endif /* #ifdef CONFIG_RCU_BOOST */
+
+/*
+ * Dump additional statistice for TINY_PREEMPT_RCU.
+ */
+static void show_tiny_preempt_stats(struct seq_file *m)
+{
+ seq_printf(m, "rcu_preempt: qlen=%ld gp=%lu g%u/p%u/c%u tasks=%c%c%c\n",
+ rcu_preempt_ctrlblk.rcb.qlen,
+ rcu_preempt_ctrlblk.n_grace_periods,
+ rcu_preempt_ctrlblk.gpnum,
+ rcu_preempt_ctrlblk.gpcpu,
+ rcu_preempt_ctrlblk.completed,
+ "T."[list_empty(&rcu_preempt_ctrlblk.blkd_tasks)],
+ "N."[!rcu_preempt_ctrlblk.gp_tasks],
+ "E."[!rcu_preempt_ctrlblk.exp_tasks]);
+#ifdef CONFIG_RCU_BOOST
+ seq_printf(m, " ttb=%c btg=",
+ "B."[!rcu_preempt_ctrlblk.boost_tasks]);
+ switch (rcu_preempt_ctrlblk.boosted_this_gp) {
+ case -1:
+ seq_puts(m, "exp");
+ break;
+ case 0:
+ seq_puts(m, "no");
+ break;
+ case 1:
+ seq_puts(m, "begun");
+ break;
+ case 2:
+ seq_puts(m, "done");
+ break;
+ default:
+ seq_printf(m, "?%d?", rcu_preempt_ctrlblk.boosted_this_gp);
+ }
+ seq_printf(m, " ntb=%lu neb=%lu nnb=%lu j=%04x bt=%04x\n",
+ rcu_preempt_ctrlblk.n_tasks_boosted,
+ rcu_preempt_ctrlblk.n_exp_boosts,
+ rcu_preempt_ctrlblk.n_normal_boosts,
+ (int)(jiffies & 0xffff),
+ (int)(rcu_preempt_ctrlblk.boost_time & 0xffff));
+ seq_printf(m, " %s: nt=%lu gt=%lu bt=%lu b=%lu ny=%lu nos=%lu\n",
+ "normal balk",
+ rcu_preempt_ctrlblk.n_normal_balk_blkd_tasks,
+ rcu_preempt_ctrlblk.n_normal_balk_gp_tasks,
+ rcu_preempt_ctrlblk.n_normal_balk_boost_tasks,
+ rcu_preempt_ctrlblk.n_normal_balk_boosted,
+ rcu_preempt_ctrlblk.n_normal_balk_notyet,
+ rcu_preempt_ctrlblk.n_normal_balk_nos);
+ seq_printf(m, " exp balk: bt=%lu nos=%lu\n",
+ rcu_preempt_ctrlblk.n_exp_balk_blkd_tasks,
+ rcu_preempt_ctrlblk.n_exp_balk_nos);
+#endif /* #ifdef CONFIG_RCU_BOOST */
+}
+
+#endif /* #ifdef CONFIG_RCU_TRACE */
+
+#ifdef CONFIG_RCU_BOOST
+
+#include "rtmutex_common.h"
+
+/*
+ * Carry out RCU priority boosting on the task indicated by ->boost_tasks,
+ * and advance ->boost_tasks to the next task in the ->blkd_tasks list.
+ */
+static int rcu_boost(void)
+{
+ unsigned long flags;
+ struct rt_mutex mtx;
+ struct list_head *np;
+ struct task_struct *t;
+
+ if (rcu_preempt_ctrlblk.boost_tasks == NULL)
+ return 0; /* Nothing to boost. */
+ raw_local_irq_save(flags);
+ rcu_preempt_ctrlblk.boosted_this_gp++;
+ t = container_of(rcu_preempt_ctrlblk.boost_tasks, struct task_struct,
+ rcu_node_entry);
+ np = rcu_next_node_entry(t);
+ rt_mutex_init_proxy_locked(&mtx, t);
+ t->rcu_boost_mutex = &mtx;
+ t->rcu_read_unlock_special |= RCU_READ_UNLOCK_BOOSTED;
+ raw_local_irq_restore(flags);
+ rt_mutex_lock(&mtx);
+ RCU_TRACE(rcu_preempt_ctrlblk.n_tasks_boosted++);
+ rcu_preempt_ctrlblk.boosted_this_gp++;
+ rt_mutex_unlock(&mtx);
+ return rcu_preempt_ctrlblk.boost_tasks != NULL;
+}
+
+/*
+ * Check to see if it is now time to start boosting RCU readers blocking
+ * the current grace period, and, if so, tell the rcu_kthread_task to
+ * start boosting them. If there is an expedited boost in progress,
+ * we wait for it to complete.
+ *
+ * If there are no blocked readers blocking the current grace period,
+ * return 0 to let the caller know, otherwise return 1. Note that this
+ * return value is independent of whether or not boosting was done.
+ */
+static int rcu_initiate_boost(void)
+{
+ if (!rcu_preempt_blocked_readers_cgp()) {
+ RCU_TRACE(rcu_preempt_ctrlblk.n_normal_balk_blkd_tasks++);
+ return 0;
+ }
+ if (rcu_preempt_ctrlblk.gp_tasks != NULL &&
+ rcu_preempt_ctrlblk.boost_tasks == NULL &&
+ rcu_preempt_ctrlblk.boosted_this_gp == 0 &&
+ ULONG_CMP_GE(jiffies, rcu_preempt_ctrlblk.boost_time)) {
+ rcu_preempt_ctrlblk.boost_tasks = rcu_preempt_ctrlblk.gp_tasks;
+ invoke_rcu_kthread();
+ RCU_TRACE(rcu_preempt_ctrlblk.n_normal_boosts++);
+ } else
+ RCU_TRACE(rcu_initiate_boost_trace());
+ return 1;
+}
+
+/*
+ * Initiate boosting for an expedited grace period.
+ */
+static void rcu_initiate_expedited_boost(void)
+{
+ unsigned long flags;
+
+ raw_local_irq_save(flags);
+ if (!list_empty(&rcu_preempt_ctrlblk.blkd_tasks)) {
+ rcu_preempt_ctrlblk.boost_tasks =
+ rcu_preempt_ctrlblk.blkd_tasks.next;
+ rcu_preempt_ctrlblk.boosted_this_gp = -1;
+ invoke_rcu_kthread();
+ RCU_TRACE(rcu_preempt_ctrlblk.n_exp_boosts++);
+ } else
+ RCU_TRACE(rcu_initiate_exp_boost_trace());
+ raw_local_irq_restore(flags);
+}
+
+#define RCU_BOOST_DELAY_JIFFIES DIV_ROUND_UP(CONFIG_RCU_BOOST_DELAY * HZ, 1000);
+
+/*
+ * Do priority-boost accounting for the start of a new grace period.
+ */
+static void rcu_preempt_boost_start_gp(void)
+{
+ rcu_preempt_ctrlblk.boost_time = jiffies + RCU_BOOST_DELAY_JIFFIES;
+ if (rcu_preempt_ctrlblk.boosted_this_gp > 0)
+ rcu_preempt_ctrlblk.boosted_this_gp = 0;
+}
+
+#else /* #ifdef CONFIG_RCU_BOOST */
+
+/*
+ * If there is no RCU priority boosting, we don't boost.
+ */
+static int rcu_boost(void)
+{
+ return 0;
+}
+
+/*
+ * If there is no RCU priority boosting, we don't initiate boosting,
+ * but we do indicate whether there are blocked readers blocking the
+ * current grace period.
+ */
+static int rcu_initiate_boost(void)
+{
+ return rcu_preempt_blocked_readers_cgp();
+}
+
+/*
+ * If there is no RCU priority boosting, we don't initiate expedited boosting.
+ */
+static void rcu_initiate_expedited_boost(void)
+{
+}
+
+/*
+ * If there is no RCU priority boosting, nothing to do at grace-period start.
+ */
+static void rcu_preempt_boost_start_gp(void)
+{
+}
+
+#endif /* else #ifdef CONFIG_RCU_BOOST */
+
/*
* Record a preemptible-RCU quiescent state for the specified CPU. Note
* that this just means that the task currently running on the CPU is
rcu_preempt_ctrlblk.gpcpu = rcu_preempt_ctrlblk.gpnum;
current->rcu_read_unlock_special &= ~RCU_READ_UNLOCK_NEED_QS;
+ /* If there is no GP then there is nothing more to do. */
+ if (!rcu_preempt_gp_in_progress())
+ return;
/*
- * If there is no GP, or if blocked readers are still blocking GP,
- * then there is nothing more to do.
+ * Check up on boosting. If there are no readers blocking the
+ * current grace period, leave.
*/
- if (!rcu_preempt_gp_in_progress() || rcu_preempt_blocked_readers_cgp())
+ if (rcu_initiate_boost())
return;
/* Advance callbacks. */
if (!rcu_preempt_blocked_readers_any())
rcu_preempt_ctrlblk.rcb.donetail = rcu_preempt_ctrlblk.nexttail;
- /* If there are done callbacks, make RCU_SOFTIRQ process them. */
+ /* If there are done callbacks, cause them to be invoked. */
if (*rcu_preempt_ctrlblk.rcb.donetail != NULL)
- raise_softirq(RCU_SOFTIRQ);
+ invoke_rcu_kthread();
}
/*
/* Official start of GP. */
rcu_preempt_ctrlblk.gpnum++;
+ RCU_TRACE(rcu_preempt_ctrlblk.n_grace_periods++);
/* Any blocked RCU readers block new GP. */
if (rcu_preempt_blocked_readers_any())
rcu_preempt_ctrlblk.gp_tasks =
rcu_preempt_ctrlblk.blkd_tasks.next;
+ /* Set up for RCU priority boosting. */
+ rcu_preempt_boost_start_gp();
+
/* If there is no running reader, CPU is done with GP. */
if (!rcu_preempt_running_reader())
rcu_preempt_cpu_qs();
*/
empty = !rcu_preempt_blocked_readers_cgp();
empty_exp = rcu_preempt_ctrlblk.exp_tasks == NULL;
- np = t->rcu_node_entry.next;
- if (np == &rcu_preempt_ctrlblk.blkd_tasks)
- np = NULL;
+ np = rcu_next_node_entry(t);
list_del(&t->rcu_node_entry);
if (&t->rcu_node_entry == rcu_preempt_ctrlblk.gp_tasks)
rcu_preempt_ctrlblk.gp_tasks = np;
if (&t->rcu_node_entry == rcu_preempt_ctrlblk.exp_tasks)
rcu_preempt_ctrlblk.exp_tasks = np;
+#ifdef CONFIG_RCU_BOOST
+ if (&t->rcu_node_entry == rcu_preempt_ctrlblk.boost_tasks)
+ rcu_preempt_ctrlblk.boost_tasks = np;
+#endif /* #ifdef CONFIG_RCU_BOOST */
INIT_LIST_HEAD(&t->rcu_node_entry);
/*
if (!empty_exp && rcu_preempt_ctrlblk.exp_tasks == NULL)
rcu_report_exp_done();
}
+#ifdef CONFIG_RCU_BOOST
+ /* Unboost self if was boosted. */
+ if (special & RCU_READ_UNLOCK_BOOSTED) {
+ t->rcu_read_unlock_special &= ~RCU_READ_UNLOCK_BOOSTED;
+ rt_mutex_unlock(t->rcu_boost_mutex);
+ t->rcu_boost_mutex = NULL;
+ }
+#endif /* #ifdef CONFIG_RCU_BOOST */
local_irq_restore(flags);
}
rcu_preempt_cpu_qs();
if (&rcu_preempt_ctrlblk.rcb.rcucblist !=
rcu_preempt_ctrlblk.rcb.donetail)
- raise_softirq(RCU_SOFTIRQ);
+ invoke_rcu_kthread();
if (rcu_preempt_gp_in_progress() &&
rcu_cpu_blocking_cur_gp() &&
rcu_preempt_running_reader())
/*
* TINY_PREEMPT_RCU has an extra callback-list tail pointer to
- * update, so this is invoked from __rcu_process_callbacks() to
+ * update, so this is invoked from rcu_process_callbacks() to
* handle that case. Of course, it is invoked for all flavors of
* RCU, but RCU callbacks can appear only on one of the lists, and
* neither ->nexttail nor ->donetail can possibly be NULL, so there
*/
static void rcu_preempt_process_callbacks(void)
{
- __rcu_process_callbacks(&rcu_preempt_ctrlblk.rcb);
+ rcu_process_callbacks(&rcu_preempt_ctrlblk.rcb);
}
/*
local_irq_save(flags);
*rcu_preempt_ctrlblk.nexttail = head;
rcu_preempt_ctrlblk.nexttail = &head->next;
+ RCU_TRACE(rcu_preempt_ctrlblk.rcb.qlen++);
rcu_preempt_start_gp(); /* checks to see if GP needed. */
local_irq_restore(flags);
}
/* Wait for tail of ->blkd_tasks list to drain. */
if (rcu_preempted_readers_exp())
+ rcu_initiate_expedited_boost();
wait_event(sync_rcu_preempt_exp_wq,
!rcu_preempted_readers_exp());
#else /* #ifdef CONFIG_TINY_PREEMPT_RCU */
+#ifdef CONFIG_RCU_TRACE
+
+/*
+ * Because preemptible RCU does not exist, it is not necessary to
+ * dump out its statistics.
+ */
+static void show_tiny_preempt_stats(struct seq_file *m)
+{
+}
+
+#endif /* #ifdef CONFIG_RCU_TRACE */
+
+/*
+ * Because preemptible RCU does not exist, it is never necessary to
+ * boost preempted RCU readers.
+ */
+static int rcu_boost(void)
+{
+ return 0;
+}
+
/*
* Because preemptible RCU does not exist, it never has any callbacks
* to check.
#endif /* #else #ifdef CONFIG_TINY_PREEMPT_RCU */
#ifdef CONFIG_DEBUG_LOCK_ALLOC
-
#include <linux/kernel_stat.h>
/*
* During boot, we forgive RCU lockdep issues. After this function is
* invoked, we start taking RCU lockdep issues seriously.
*/
-void rcu_scheduler_starting(void)
+void __init rcu_scheduler_starting(void)
{
WARN_ON(nr_context_switches() > 0);
rcu_scheduler_active = 1;
}
#endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
+
+#ifdef CONFIG_RCU_BOOST
+#define RCU_BOOST_PRIO CONFIG_RCU_BOOST_PRIO
+#else /* #ifdef CONFIG_RCU_BOOST */
+#define RCU_BOOST_PRIO 1
+#endif /* #else #ifdef CONFIG_RCU_BOOST */
+
+#ifdef CONFIG_RCU_TRACE
+
+#ifdef CONFIG_RCU_BOOST
+
+static void rcu_initiate_boost_trace(void)
+{
+ if (rcu_preempt_ctrlblk.gp_tasks == NULL)
+ rcu_preempt_ctrlblk.n_normal_balk_gp_tasks++;
+ else if (rcu_preempt_ctrlblk.boost_tasks != NULL)
+ rcu_preempt_ctrlblk.n_normal_balk_boost_tasks++;
+ else if (rcu_preempt_ctrlblk.boosted_this_gp != 0)
+ rcu_preempt_ctrlblk.n_normal_balk_boosted++;
+ else if (!ULONG_CMP_GE(jiffies, rcu_preempt_ctrlblk.boost_time))
+ rcu_preempt_ctrlblk.n_normal_balk_notyet++;
+ else
+ rcu_preempt_ctrlblk.n_normal_balk_nos++;
+}
+
+static void rcu_initiate_exp_boost_trace(void)
+{
+ if (list_empty(&rcu_preempt_ctrlblk.blkd_tasks))
+ rcu_preempt_ctrlblk.n_exp_balk_blkd_tasks++;
+ else
+ rcu_preempt_ctrlblk.n_exp_balk_nos++;
+}
+
+#endif /* #ifdef CONFIG_RCU_BOOST */
+
+static void rcu_trace_sub_qlen(struct rcu_ctrlblk *rcp, int n)
+{
+ unsigned long flags;
+
+ raw_local_irq_save(flags);
+ rcp->qlen -= n;
+ raw_local_irq_restore(flags);
+}
+
+/*
+ * Dump statistics for TINY_RCU, such as they are.
+ */
+static int show_tiny_stats(struct seq_file *m, void *unused)
+{
+ show_tiny_preempt_stats(m);
+ seq_printf(m, "rcu_sched: qlen: %ld\n", rcu_sched_ctrlblk.qlen);
+ seq_printf(m, "rcu_bh: qlen: %ld\n", rcu_bh_ctrlblk.qlen);
+ return 0;
+}
+
+static int show_tiny_stats_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, show_tiny_stats, NULL);
+}
+
+static const struct file_operations show_tiny_stats_fops = {
+ .owner = THIS_MODULE,
+ .open = show_tiny_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct dentry *rcudir;
+
+static int __init rcutiny_trace_init(void)
+{
+ struct dentry *retval;
+
+ rcudir = debugfs_create_dir("rcu", NULL);
+ if (!rcudir)
+ goto free_out;
+ retval = debugfs_create_file("rcudata", 0444, rcudir,
+ NULL, &show_tiny_stats_fops);
+ if (!retval)
+ goto free_out;
+ return 0;
+free_out:
+ debugfs_remove_recursive(rcudir);
+ return 1;
+}
+
+static void __exit rcutiny_trace_cleanup(void)
+{
+ debugfs_remove_recursive(rcudir);
+}
+
+module_init(rcutiny_trace_init);
+module_exit(rcutiny_trace_cleanup);
+
+MODULE_AUTHOR("Paul E. McKenney");
+MODULE_DESCRIPTION("Read-Copy Update tracing for tiny implementation");
+MODULE_LICENSE("GPL");
+
+#endif /* #ifdef CONFIG_RCU_TRACE */
#include <linux/srcu.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
+#include <linux/sched.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Paul E. McKenney <paulmck@us.ibm.com> and "
static int fqs_duration = 0; /* Duration of bursts (us), 0 to disable. */
static int fqs_holdoff = 0; /* Hold time within burst (us). */
static int fqs_stutter = 3; /* Wait time between bursts (s). */
+static int test_boost = 1; /* Test RCU prio boost: 0=no, 1=maybe, 2=yes. */
+static int test_boost_interval = 7; /* Interval between boost tests, seconds. */
+static int test_boost_duration = 4; /* Duration of each boost test, seconds. */
static char *torture_type = "rcu"; /* What RCU implementation to torture. */
module_param(nreaders, int, 0444);
MODULE_PARM_DESC(fqs_holdoff, "Holdoff time within fqs bursts (us)");
module_param(fqs_stutter, int, 0444);
MODULE_PARM_DESC(fqs_stutter, "Wait time between fqs bursts (s)");
+module_param(test_boost, int, 0444);
+MODULE_PARM_DESC(test_boost, "Test RCU prio boost: 0=no, 1=maybe, 2=yes.");
+module_param(test_boost_interval, int, 0444);
+MODULE_PARM_DESC(test_boost_interval, "Interval between boost tests, seconds.");
+module_param(test_boost_duration, int, 0444);
+MODULE_PARM_DESC(test_boost_duration, "Duration of each boost test, seconds.");
module_param(torture_type, charp, 0444);
MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu, rcu_bh, srcu)");
static struct task_struct *shuffler_task;
static struct task_struct *stutter_task;
static struct task_struct *fqs_task;
+static struct task_struct *boost_tasks[NR_CPUS];
#define RCU_TORTURE_PIPE_LEN 10
static atomic_t n_rcu_torture_free;
static atomic_t n_rcu_torture_mberror;
static atomic_t n_rcu_torture_error;
+static long n_rcu_torture_boost_ktrerror;
+static long n_rcu_torture_boost_rterror;
+static long n_rcu_torture_boost_allocerror;
+static long n_rcu_torture_boost_afferror;
+static long n_rcu_torture_boost_failure;
+static long n_rcu_torture_boosts;
static long n_rcu_torture_timers;
static struct list_head rcu_torture_removed;
static cpumask_var_t shuffle_tmp_mask;
#endif
int rcutorture_runnable = RCUTORTURE_RUNNABLE_INIT;
+#ifdef CONFIG_RCU_BOOST
+#define rcu_can_boost() 1
+#else /* #ifdef CONFIG_RCU_BOOST */
+#define rcu_can_boost() 0
+#endif /* #else #ifdef CONFIG_RCU_BOOST */
+
+static unsigned long boost_starttime; /* jiffies of next boost test start. */
+DEFINE_MUTEX(boost_mutex); /* protect setting boost_starttime */
+ /* and boost task create/destroy. */
+
/* Mediate rmmod and system shutdown. Concurrent rmmod & shutdown illegal! */
#define FULLSTOP_DONTSTOP 0 /* Normal operation. */
void (*fqs)(void);
int (*stats)(char *page);
int irq_capable;
+ int can_boost;
char *name;
};
.fqs = rcu_force_quiescent_state,
.stats = NULL,
.irq_capable = 1,
+ .can_boost = rcu_can_boost(),
.name = "rcu"
};
.fqs = rcu_force_quiescent_state,
.stats = NULL,
.irq_capable = 1,
+ .can_boost = rcu_can_boost(),
.name = "rcu_sync"
};
.fqs = rcu_force_quiescent_state,
.stats = NULL,
.irq_capable = 1,
+ .can_boost = rcu_can_boost(),
.name = "rcu_expedited"
};
.name = "sched_expedited"
};
+/*
+ * RCU torture priority-boost testing. Runs one real-time thread per
+ * CPU for moderate bursts, repeatedly registering RCU callbacks and
+ * spinning waiting for them to be invoked. If a given callback takes
+ * too long to be invoked, we assume that priority inversion has occurred.
+ */
+
+struct rcu_boost_inflight {
+ struct rcu_head rcu;
+ int inflight;
+};
+
+static void rcu_torture_boost_cb(struct rcu_head *head)
+{
+ struct rcu_boost_inflight *rbip =
+ container_of(head, struct rcu_boost_inflight, rcu);
+
+ smp_mb(); /* Ensure RCU-core accesses precede clearing ->inflight */
+ rbip->inflight = 0;
+}
+
+static int rcu_torture_boost(void *arg)
+{
+ unsigned long call_rcu_time;
+ unsigned long endtime;
+ unsigned long oldstarttime;
+ struct rcu_boost_inflight rbi = { .inflight = 0 };
+ struct sched_param sp;
+
+ VERBOSE_PRINTK_STRING("rcu_torture_boost started");
+
+ /* Set real-time priority. */
+ sp.sched_priority = 1;
+ if (sched_setscheduler(current, SCHED_FIFO, &sp) < 0) {
+ VERBOSE_PRINTK_STRING("rcu_torture_boost RT prio failed!");
+ n_rcu_torture_boost_rterror++;
+ }
+
+ /* Each pass through the following loop does one boost-test cycle. */
+ do {
+ /* Wait for the next test interval. */
+ oldstarttime = boost_starttime;
+ while (jiffies - oldstarttime > ULONG_MAX / 2) {
+ schedule_timeout_uninterruptible(1);
+ rcu_stutter_wait("rcu_torture_boost");
+ if (kthread_should_stop() ||
+ fullstop != FULLSTOP_DONTSTOP)
+ goto checkwait;
+ }
+
+ /* Do one boost-test interval. */
+ endtime = oldstarttime + test_boost_duration * HZ;
+ call_rcu_time = jiffies;
+ while (jiffies - endtime > ULONG_MAX / 2) {
+ /* If we don't have a callback in flight, post one. */
+ if (!rbi.inflight) {
+ smp_mb(); /* RCU core before ->inflight = 1. */
+ rbi.inflight = 1;
+ call_rcu(&rbi.rcu, rcu_torture_boost_cb);
+ if (jiffies - call_rcu_time >
+ test_boost_duration * HZ - HZ / 2) {
+ VERBOSE_PRINTK_STRING("rcu_torture_boost boosting failed");
+ n_rcu_torture_boost_failure++;
+ }
+ call_rcu_time = jiffies;
+ }
+ cond_resched();
+ rcu_stutter_wait("rcu_torture_boost");
+ if (kthread_should_stop() ||
+ fullstop != FULLSTOP_DONTSTOP)
+ goto checkwait;
+ }
+
+ /*
+ * Set the start time of the next test interval.
+ * Yes, this is vulnerable to long delays, but such
+ * delays simply cause a false negative for the next
+ * interval. Besides, we are running at RT priority,
+ * so delays should be relatively rare.
+ */
+ while (oldstarttime == boost_starttime) {
+ if (mutex_trylock(&boost_mutex)) {
+ boost_starttime = jiffies +
+ test_boost_interval * HZ;
+ n_rcu_torture_boosts++;
+ mutex_unlock(&boost_mutex);
+ break;
+ }
+ schedule_timeout_uninterruptible(1);
+ }
+
+ /* Go do the stutter. */
+checkwait: rcu_stutter_wait("rcu_torture_boost");
+ } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+
+ /* Clean up and exit. */
+ VERBOSE_PRINTK_STRING("rcu_torture_boost task stopping");
+ rcutorture_shutdown_absorb("rcu_torture_boost");
+ while (!kthread_should_stop() || rbi.inflight)
+ schedule_timeout_uninterruptible(1);
+ smp_mb(); /* order accesses to ->inflight before stack-frame death. */
+ return 0;
+}
+
/*
* RCU torture force-quiescent-state kthread. Repeatedly induces
* bursts of calls to force_quiescent_state(), increasing the probability
cnt += sprintf(&page[cnt], "%s%s ", torture_type, TORTURE_FLAG);
cnt += sprintf(&page[cnt],
"rtc: %p ver: %ld tfle: %d rta: %d rtaf: %d rtf: %d "
- "rtmbe: %d nt: %ld",
+ "rtmbe: %d rtbke: %ld rtbre: %ld rtbae: %ld rtbafe: %ld "
+ "rtbf: %ld rtb: %ld nt: %ld",
rcu_torture_current,
rcu_torture_current_version,
list_empty(&rcu_torture_freelist),
atomic_read(&n_rcu_torture_alloc_fail),
atomic_read(&n_rcu_torture_free),
atomic_read(&n_rcu_torture_mberror),
+ n_rcu_torture_boost_ktrerror,
+ n_rcu_torture_boost_rterror,
+ n_rcu_torture_boost_allocerror,
+ n_rcu_torture_boost_afferror,
+ n_rcu_torture_boost_failure,
+ n_rcu_torture_boosts,
n_rcu_torture_timers);
- if (atomic_read(&n_rcu_torture_mberror) != 0)
+ if (atomic_read(&n_rcu_torture_mberror) != 0 ||
+ n_rcu_torture_boost_ktrerror != 0 ||
+ n_rcu_torture_boost_rterror != 0 ||
+ n_rcu_torture_boost_allocerror != 0 ||
+ n_rcu_torture_boost_afferror != 0 ||
+ n_rcu_torture_boost_failure != 0)
cnt += sprintf(&page[cnt], " !!!");
cnt += sprintf(&page[cnt], "\n%s%s ", torture_type, TORTURE_FLAG);
if (i > 1) {
}
static inline void
-rcu_torture_print_module_parms(char *tag)
+rcu_torture_print_module_parms(struct rcu_torture_ops *cur_ops, char *tag)
{
printk(KERN_ALERT "%s" TORTURE_FLAG
"--- %s: nreaders=%d nfakewriters=%d "
"stat_interval=%d verbose=%d test_no_idle_hz=%d "
"shuffle_interval=%d stutter=%d irqreader=%d "
- "fqs_duration=%d fqs_holdoff=%d fqs_stutter=%d\n",
+ "fqs_duration=%d fqs_holdoff=%d fqs_stutter=%d "
+ "test_boost=%d/%d test_boost_interval=%d "
+ "test_boost_duration=%d\n",
torture_type, tag, nrealreaders, nfakewriters,
stat_interval, verbose, test_no_idle_hz, shuffle_interval,
- stutter, irqreader, fqs_duration, fqs_holdoff, fqs_stutter);
+ stutter, irqreader, fqs_duration, fqs_holdoff, fqs_stutter,
+ test_boost, cur_ops->can_boost,
+ test_boost_interval, test_boost_duration);
}
-static struct notifier_block rcutorture_nb = {
+static struct notifier_block rcutorture_shutdown_nb = {
.notifier_call = rcutorture_shutdown_notify,
};
+static void rcutorture_booster_cleanup(int cpu)
+{
+ struct task_struct *t;
+
+ if (boost_tasks[cpu] == NULL)
+ return;
+ mutex_lock(&boost_mutex);
+ VERBOSE_PRINTK_STRING("Stopping rcu_torture_boost task");
+ t = boost_tasks[cpu];
+ boost_tasks[cpu] = NULL;
+ mutex_unlock(&boost_mutex);
+
+ /* This must be outside of the mutex, otherwise deadlock! */
+ kthread_stop(t);
+}
+
+static int rcutorture_booster_init(int cpu)
+{
+ int retval;
+
+ if (boost_tasks[cpu] != NULL)
+ return 0; /* Already created, nothing more to do. */
+
+ /* Don't allow time recalculation while creating a new task. */
+ mutex_lock(&boost_mutex);
+ VERBOSE_PRINTK_STRING("Creating rcu_torture_boost task");
+ boost_tasks[cpu] = kthread_create(rcu_torture_boost, NULL,
+ "rcu_torture_boost");
+ if (IS_ERR(boost_tasks[cpu])) {
+ retval = PTR_ERR(boost_tasks[cpu]);
+ VERBOSE_PRINTK_STRING("rcu_torture_boost task create failed");
+ n_rcu_torture_boost_ktrerror++;
+ boost_tasks[cpu] = NULL;
+ mutex_unlock(&boost_mutex);
+ return retval;
+ }
+ kthread_bind(boost_tasks[cpu], cpu);
+ wake_up_process(boost_tasks[cpu]);
+ mutex_unlock(&boost_mutex);
+ return 0;
+}
+
+static int rcutorture_cpu_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
+{
+ long cpu = (long)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_DOWN_FAILED:
+ (void)rcutorture_booster_init(cpu);
+ break;
+ case CPU_DOWN_PREPARE:
+ rcutorture_booster_cleanup(cpu);
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block rcutorture_cpu_nb = {
+ .notifier_call = rcutorture_cpu_notify,
+};
+
static void
rcu_torture_cleanup(void)
{
}
fullstop = FULLSTOP_RMMOD;
mutex_unlock(&fullstop_mutex);
- unregister_reboot_notifier(&rcutorture_nb);
+ unregister_reboot_notifier(&rcutorture_shutdown_nb);
if (stutter_task) {
VERBOSE_PRINTK_STRING("Stopping rcu_torture_stutter task");
kthread_stop(stutter_task);
kthread_stop(fqs_task);
}
fqs_task = NULL;
+ if ((test_boost == 1 && cur_ops->can_boost) ||
+ test_boost == 2) {
+ unregister_cpu_notifier(&rcutorture_cpu_nb);
+ for_each_possible_cpu(i)
+ rcutorture_booster_cleanup(i);
+ }
/* Wait for all RCU callbacks to fire. */
if (cur_ops->cleanup)
cur_ops->cleanup();
if (atomic_read(&n_rcu_torture_error))
- rcu_torture_print_module_parms("End of test: FAILURE");
+ rcu_torture_print_module_parms(cur_ops, "End of test: FAILURE");
else
- rcu_torture_print_module_parms("End of test: SUCCESS");
+ rcu_torture_print_module_parms(cur_ops, "End of test: SUCCESS");
}
static int __init
nrealreaders = nreaders;
else
nrealreaders = 2 * num_online_cpus();
- rcu_torture_print_module_parms("Start of test");
+ rcu_torture_print_module_parms(cur_ops, "Start of test");
fullstop = FULLSTOP_DONTSTOP;
/* Set up the freelist. */
atomic_set(&n_rcu_torture_free, 0);
atomic_set(&n_rcu_torture_mberror, 0);
atomic_set(&n_rcu_torture_error, 0);
+ n_rcu_torture_boost_ktrerror = 0;
+ n_rcu_torture_boost_rterror = 0;
+ n_rcu_torture_boost_allocerror = 0;
+ n_rcu_torture_boost_afferror = 0;
+ n_rcu_torture_boost_failure = 0;
+ n_rcu_torture_boosts = 0;
for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++)
atomic_set(&rcu_torture_wcount[i], 0);
for_each_possible_cpu(cpu) {
goto unwind;
}
}
- register_reboot_notifier(&rcutorture_nb);
+ if (test_boost_interval < 1)
+ test_boost_interval = 1;
+ if (test_boost_duration < 2)
+ test_boost_duration = 2;
+ if ((test_boost == 1 && cur_ops->can_boost) ||
+ test_boost == 2) {
+ int retval;
+
+ boost_starttime = jiffies + test_boost_interval * HZ;
+ register_cpu_notifier(&rcutorture_cpu_nb);
+ for_each_possible_cpu(i) {
+ if (cpu_is_offline(i))
+ continue; /* Heuristic: CPU can go offline. */
+ retval = rcutorture_booster_init(i);
+ if (retval < 0) {
+ firsterr = retval;
+ goto unwind;
+ }
+ }
+ }
+ register_reboot_notifier(&rcutorture_shutdown_nb);
mutex_unlock(&fullstop_mutex);
return 0;
.gpnum = -300, \
.completed = -300, \
.onofflock = __RAW_SPIN_LOCK_UNLOCKED(&structname.onofflock), \
- .orphan_cbs_list = NULL, \
- .orphan_cbs_tail = &structname.orphan_cbs_list, \
- .orphan_qlen = 0, \
.fqslock = __RAW_SPIN_LOCK_UNLOCKED(&structname.fqslock), \
.n_force_qs = 0, \
.n_force_qs_ngp = 0, \
static void __note_new_gpnum(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp)
{
if (rdp->gpnum != rnp->gpnum) {
- rdp->qs_pending = 1;
- rdp->passed_quiesc = 0;
+ /*
+ * If the current grace period is waiting for this CPU,
+ * set up to detect a quiescent state, otherwise don't
+ * go looking for one.
+ */
rdp->gpnum = rnp->gpnum;
+ if (rnp->qsmask & rdp->grpmask) {
+ rdp->qs_pending = 1;
+ rdp->passed_quiesc = 0;
+ } else
+ rdp->qs_pending = 0;
}
}
/* Remember that we saw this grace-period completion. */
rdp->completed = rnp->completed;
+
+ /*
+ * If we were in an extended quiescent state, we may have
+ * missed some grace periods that others CPUs handled on
+ * our behalf. Catch up with this state to avoid noting
+ * spurious new grace periods. If another grace period
+ * has started, then rnp->gpnum will have advanced, so
+ * we will detect this later on.
+ */
+ if (ULONG_CMP_LT(rdp->gpnum, rdp->completed))
+ rdp->gpnum = rdp->completed;
+
+ /*
+ * If RCU does not need a quiescent state from this CPU,
+ * then make sure that this CPU doesn't go looking for one.
+ */
+ if ((rnp->qsmask & rdp->grpmask) == 0)
+ rdp->qs_pending = 0;
}
}
#ifdef CONFIG_HOTPLUG_CPU
/*
- * Move a dying CPU's RCU callbacks to the ->orphan_cbs_list for the
- * specified flavor of RCU. The callbacks will be adopted by the next
- * _rcu_barrier() invocation or by the CPU_DEAD notifier, whichever
- * comes first. Because this is invoked from the CPU_DYING notifier,
- * irqs are already disabled.
+ * Move a dying CPU's RCU callbacks to online CPU's callback list.
+ * Synchronization is not required because this function executes
+ * in stop_machine() context.
*/
-static void rcu_send_cbs_to_orphanage(struct rcu_state *rsp)
+static void rcu_send_cbs_to_online(struct rcu_state *rsp)
{
int i;
+ /* current DYING CPU is cleared in the cpu_online_mask */
+ int receive_cpu = cpumask_any(cpu_online_mask);
struct rcu_data *rdp = this_cpu_ptr(rsp->rda);
+ struct rcu_data *receive_rdp = per_cpu_ptr(rsp->rda, receive_cpu);
if (rdp->nxtlist == NULL)
return; /* irqs disabled, so comparison is stable. */
- raw_spin_lock(&rsp->onofflock); /* irqs already disabled. */
- *rsp->orphan_cbs_tail = rdp->nxtlist;
- rsp->orphan_cbs_tail = rdp->nxttail[RCU_NEXT_TAIL];
+
+ *receive_rdp->nxttail[RCU_NEXT_TAIL] = rdp->nxtlist;
+ receive_rdp->nxttail[RCU_NEXT_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
+ receive_rdp->qlen += rdp->qlen;
+ receive_rdp->n_cbs_adopted += rdp->qlen;
+ rdp->n_cbs_orphaned += rdp->qlen;
+
rdp->nxtlist = NULL;
for (i = 0; i < RCU_NEXT_SIZE; i++)
rdp->nxttail[i] = &rdp->nxtlist;
- rsp->orphan_qlen += rdp->qlen;
- rdp->n_cbs_orphaned += rdp->qlen;
rdp->qlen = 0;
- raw_spin_unlock(&rsp->onofflock); /* irqs remain disabled. */
-}
-
-/*
- * Adopt previously orphaned RCU callbacks.
- */
-static void rcu_adopt_orphan_cbs(struct rcu_state *rsp)
-{
- unsigned long flags;
- struct rcu_data *rdp;
-
- raw_spin_lock_irqsave(&rsp->onofflock, flags);
- rdp = this_cpu_ptr(rsp->rda);
- if (rsp->orphan_cbs_list == NULL) {
- raw_spin_unlock_irqrestore(&rsp->onofflock, flags);
- return;
- }
- *rdp->nxttail[RCU_NEXT_TAIL] = rsp->orphan_cbs_list;
- rdp->nxttail[RCU_NEXT_TAIL] = rsp->orphan_cbs_tail;
- rdp->qlen += rsp->orphan_qlen;
- rdp->n_cbs_adopted += rsp->orphan_qlen;
- rsp->orphan_cbs_list = NULL;
- rsp->orphan_cbs_tail = &rsp->orphan_cbs_list;
- rsp->orphan_qlen = 0;
- raw_spin_unlock_irqrestore(&rsp->onofflock, flags);
}
/*
raw_spin_unlock_irqrestore(&rnp->lock, flags);
if (need_report & RCU_OFL_TASKS_EXP_GP)
rcu_report_exp_rnp(rsp, rnp);
-
- rcu_adopt_orphan_cbs(rsp);
}
/*
#else /* #ifdef CONFIG_HOTPLUG_CPU */
-static void rcu_send_cbs_to_orphanage(struct rcu_state *rsp)
-{
-}
-
-static void rcu_adopt_orphan_cbs(struct rcu_state *rsp)
+static void rcu_send_cbs_to_online(struct rcu_state *rsp)
{
}
*/
local_irq_save(flags);
rdp = this_cpu_ptr(rsp->rda);
- rcu_process_gp_end(rsp, rdp);
- check_for_new_grace_period(rsp, rdp);
/* Add the callback to our list. */
*rdp->nxttail[RCU_NEXT_TAIL] = head;
rdp->nxttail[RCU_NEXT_TAIL] = &head->next;
- /* Start a new grace period if one not already started. */
- if (!rcu_gp_in_progress(rsp)) {
- unsigned long nestflag;
- struct rcu_node *rnp_root = rcu_get_root(rsp);
-
- raw_spin_lock_irqsave(&rnp_root->lock, nestflag);
- rcu_start_gp(rsp, nestflag); /* releases rnp_root->lock. */
- }
-
/*
* Force the grace period if too many callbacks or too long waiting.
* Enforce hysteresis, and don't invoke force_quiescent_state()
* is the only one waiting for a grace period to complete.
*/
if (unlikely(++rdp->qlen > rdp->qlen_last_fqs_check + qhimark)) {
- rdp->blimit = LONG_MAX;
- if (rsp->n_force_qs == rdp->n_force_qs_snap &&
- *rdp->nxttail[RCU_DONE_TAIL] != head)
- force_quiescent_state(rsp, 0);
- rdp->n_force_qs_snap = rsp->n_force_qs;
- rdp->qlen_last_fqs_check = rdp->qlen;
+
+ /* Are we ignoring a completed grace period? */
+ rcu_process_gp_end(rsp, rdp);
+ check_for_new_grace_period(rsp, rdp);
+
+ /* Start a new grace period if one not already started. */
+ if (!rcu_gp_in_progress(rsp)) {
+ unsigned long nestflag;
+ struct rcu_node *rnp_root = rcu_get_root(rsp);
+
+ raw_spin_lock_irqsave(&rnp_root->lock, nestflag);
+ rcu_start_gp(rsp, nestflag); /* rlses rnp_root->lock */
+ } else {
+ /* Give the grace period a kick. */
+ rdp->blimit = LONG_MAX;
+ if (rsp->n_force_qs == rdp->n_force_qs_snap &&
+ *rdp->nxttail[RCU_DONE_TAIL] != head)
+ force_quiescent_state(rsp, 0);
+ rdp->n_force_qs_snap = rsp->n_force_qs;
+ rdp->qlen_last_fqs_check = rdp->qlen;
+ }
} else if (ULONG_CMP_LT(ACCESS_ONCE(rsp->jiffies_force_qs), jiffies))
force_quiescent_state(rsp, 1);
local_irq_restore(flags);
* decrement rcu_barrier_cpu_count -- otherwise the first CPU
* might complete its grace period before all of the other CPUs
* did their increment, causing this function to return too
- * early.
+ * early. Note that on_each_cpu() disables irqs, which prevents
+ * any CPUs from coming online or going offline until each online
+ * CPU has queued its RCU-barrier callback.
*/
atomic_set(&rcu_barrier_cpu_count, 1);
- preempt_disable(); /* stop CPU_DYING from filling orphan_cbs_list */
- rcu_adopt_orphan_cbs(rsp);
on_each_cpu(rcu_barrier_func, (void *)call_rcu_func, 1);
- preempt_enable(); /* CPU_DYING can again fill orphan_cbs_list */
if (atomic_dec_and_test(&rcu_barrier_cpu_count))
complete(&rcu_barrier_completion);
wait_for_completion(&rcu_barrier_completion);
case CPU_DYING:
case CPU_DYING_FROZEN:
/*
- * preempt_disable() in _rcu_barrier() prevents stop_machine(),
- * so when "on_each_cpu(rcu_barrier_func, (void *)type, 1);"
- * returns, all online cpus have queued rcu_barrier_func().
- * The dying CPU clears its cpu_online_mask bit and
- * moves all of its RCU callbacks to ->orphan_cbs_list
- * in the context of stop_machine(), so subsequent calls
- * to _rcu_barrier() will adopt these callbacks and only
- * then queue rcu_barrier_func() on all remaining CPUs.
+ * The whole machine is "stopped" except this CPU, so we can
+ * touch any data without introducing corruption. We send the
+ * dying CPU's callbacks to an arbitrarily chosen online CPU.
*/
- rcu_send_cbs_to_orphanage(&rcu_bh_state);
- rcu_send_cbs_to_orphanage(&rcu_sched_state);
- rcu_preempt_send_cbs_to_orphanage();
+ rcu_send_cbs_to_online(&rcu_bh_state);
+ rcu_send_cbs_to_online(&rcu_sched_state);
+ rcu_preempt_send_cbs_to_online();
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
{
int i;
- for (i = NUM_RCU_LVLS - 1; i >= 0; i--)
+ for (i = NUM_RCU_LVLS - 1; i > 0; i--)
rsp->levelspread[i] = CONFIG_RCU_FANOUT;
+ rsp->levelspread[0] = RCU_FANOUT_LEAF;
}
#else /* #ifdef CONFIG_RCU_FANOUT_EXACT */
static void __init rcu_init_levelspread(struct rcu_state *rsp)
/*
* Define shape of hierarchy based on NR_CPUS and CONFIG_RCU_FANOUT.
* In theory, it should be possible to add more levels straightforwardly.
- * In practice, this has not been tested, so there is probably some
- * bug somewhere.
+ * In practice, this did work well going from three levels to four.
+ * Of course, your mileage may vary.
*/
#define MAX_RCU_LVLS 4
-#define RCU_FANOUT (CONFIG_RCU_FANOUT)
-#define RCU_FANOUT_SQ (RCU_FANOUT * RCU_FANOUT)
-#define RCU_FANOUT_CUBE (RCU_FANOUT_SQ * RCU_FANOUT)
-#define RCU_FANOUT_FOURTH (RCU_FANOUT_CUBE * RCU_FANOUT)
-
-#if NR_CPUS <= RCU_FANOUT
+#if CONFIG_RCU_FANOUT > 16
+#define RCU_FANOUT_LEAF 16
+#else /* #if CONFIG_RCU_FANOUT > 16 */
+#define RCU_FANOUT_LEAF (CONFIG_RCU_FANOUT)
+#endif /* #else #if CONFIG_RCU_FANOUT > 16 */
+#define RCU_FANOUT_1 (RCU_FANOUT_LEAF)
+#define RCU_FANOUT_2 (RCU_FANOUT_1 * CONFIG_RCU_FANOUT)
+#define RCU_FANOUT_3 (RCU_FANOUT_2 * CONFIG_RCU_FANOUT)
+#define RCU_FANOUT_4 (RCU_FANOUT_3 * CONFIG_RCU_FANOUT)
+
+#if NR_CPUS <= RCU_FANOUT_1
# define NUM_RCU_LVLS 1
# define NUM_RCU_LVL_0 1
# define NUM_RCU_LVL_1 (NR_CPUS)
# define NUM_RCU_LVL_2 0
# define NUM_RCU_LVL_3 0
# define NUM_RCU_LVL_4 0
-#elif NR_CPUS <= RCU_FANOUT_SQ
+#elif NR_CPUS <= RCU_FANOUT_2
# define NUM_RCU_LVLS 2
# define NUM_RCU_LVL_0 1
-# define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT)
+# define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_1)
# define NUM_RCU_LVL_2 (NR_CPUS)
# define NUM_RCU_LVL_3 0
# define NUM_RCU_LVL_4 0
-#elif NR_CPUS <= RCU_FANOUT_CUBE
+#elif NR_CPUS <= RCU_FANOUT_3
# define NUM_RCU_LVLS 3
# define NUM_RCU_LVL_0 1
-# define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_SQ)
-# define NUM_RCU_LVL_2 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT)
-# define NUM_RCU_LVL_3 NR_CPUS
+# define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_2)
+# define NUM_RCU_LVL_2 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_1)
+# define NUM_RCU_LVL_3 (NR_CPUS)
# define NUM_RCU_LVL_4 0
-#elif NR_CPUS <= RCU_FANOUT_FOURTH
+#elif NR_CPUS <= RCU_FANOUT_4
# define NUM_RCU_LVLS 4
# define NUM_RCU_LVL_0 1
-# define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_CUBE)
-# define NUM_RCU_LVL_2 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_SQ)
-# define NUM_RCU_LVL_3 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT)
-# define NUM_RCU_LVL_4 NR_CPUS
+# define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_3)
+# define NUM_RCU_LVL_2 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_2)
+# define NUM_RCU_LVL_3 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_1)
+# define NUM_RCU_LVL_4 (NR_CPUS)
#else
# error "CONFIG_RCU_FANOUT insufficient for NR_CPUS"
-#endif /* #if (NR_CPUS) <= RCU_FANOUT */
+#endif /* #if (NR_CPUS) <= RCU_FANOUT_1 */
#define RCU_SUM (NUM_RCU_LVL_0 + NUM_RCU_LVL_1 + NUM_RCU_LVL_2 + NUM_RCU_LVL_3 + NUM_RCU_LVL_4)
#define NUM_RCU_NODES (RCU_SUM - NR_CPUS)
long qlen_last_fqs_check;
/* qlen at last check for QS forcing */
unsigned long n_cbs_invoked; /* count of RCU cbs invoked. */
- unsigned long n_cbs_orphaned; /* RCU cbs sent to orphanage. */
- unsigned long n_cbs_adopted; /* RCU cbs adopted from orphanage. */
+ unsigned long n_cbs_orphaned; /* RCU cbs orphaned by dying CPU */
+ unsigned long n_cbs_adopted; /* RCU cbs adopted from dying CPU */
unsigned long n_force_qs_snap;
/* did other CPU force QS recently? */
long blimit; /* Upper limit on a processed batch */
/* End of fields guarded by root rcu_node's lock. */
raw_spinlock_t onofflock; /* exclude on/offline and */
- /* starting new GP. Also */
- /* protects the following */
- /* orphan_cbs fields. */
- struct rcu_head *orphan_cbs_list; /* list of rcu_head structs */
- /* orphaned by all CPUs in */
- /* a given leaf rcu_node */
- /* going offline. */
- struct rcu_head **orphan_cbs_tail; /* And tail pointer. */
- long orphan_qlen; /* Number of orphaned cbs. */
+ /* starting new GP. */
raw_spinlock_t fqslock; /* Only one task forcing */
/* quiescent states. */
unsigned long jiffies_force_qs; /* Time at which to invoke */
static int rcu_preempt_pending(int cpu);
static int rcu_preempt_needs_cpu(int cpu);
static void __cpuinit rcu_preempt_init_percpu_data(int cpu);
-static void rcu_preempt_send_cbs_to_orphanage(void);
+static void rcu_preempt_send_cbs_to_online(void);
static void __init __rcu_init_preempt(void);
static void rcu_needs_cpu_flush(void);
*/
#include <linux/delay.h>
+#include <linux/stop_machine.h>
/*
* Check the RCU kernel configuration parameters and print informative
}
/*
- * Move preemptable RCU's callbacks to ->orphan_cbs_list.
+ * Move preemptable RCU's callbacks from dying CPU to other online CPU.
*/
-static void rcu_preempt_send_cbs_to_orphanage(void)
+static void rcu_preempt_send_cbs_to_online(void)
{
- rcu_send_cbs_to_orphanage(&rcu_preempt_state);
+ rcu_send_cbs_to_online(&rcu_preempt_state);
}
/*
/*
* Because there is no preemptable RCU, there are no callbacks to move.
*/
-static void rcu_preempt_send_cbs_to_orphanage(void)
+static void rcu_preempt_send_cbs_to_online(void)
{
}
#endif /* #else #ifdef CONFIG_TREE_PREEMPT_RCU */
+#ifndef CONFIG_SMP
+
+void synchronize_sched_expedited(void)
+{
+ cond_resched();
+}
+EXPORT_SYMBOL_GPL(synchronize_sched_expedited);
+
+#else /* #ifndef CONFIG_SMP */
+
+static atomic_t sync_sched_expedited_started = ATOMIC_INIT(0);
+static atomic_t sync_sched_expedited_done = ATOMIC_INIT(0);
+
+static int synchronize_sched_expedited_cpu_stop(void *data)
+{
+ /*
+ * There must be a full memory barrier on each affected CPU
+ * between the time that try_stop_cpus() is called and the
+ * time that it returns.
+ *
+ * In the current initial implementation of cpu_stop, the
+ * above condition is already met when the control reaches
+ * this point and the following smp_mb() is not strictly
+ * necessary. Do smp_mb() anyway for documentation and
+ * robustness against future implementation changes.
+ */
+ smp_mb(); /* See above comment block. */
+ return 0;
+}
+
+/*
+ * Wait for an rcu-sched grace period to elapse, but use "big hammer"
+ * approach to force grace period to end quickly. This consumes
+ * significant time on all CPUs, and is thus not recommended for
+ * any sort of common-case code.
+ *
+ * Note that it is illegal to call this function while holding any
+ * lock that is acquired by a CPU-hotplug notifier. Failing to
+ * observe this restriction will result in deadlock.
+ *
+ * This implementation can be thought of as an application of ticket
+ * locking to RCU, with sync_sched_expedited_started and
+ * sync_sched_expedited_done taking on the roles of the halves
+ * of the ticket-lock word. Each task atomically increments
+ * sync_sched_expedited_started upon entry, snapshotting the old value,
+ * then attempts to stop all the CPUs. If this succeeds, then each
+ * CPU will have executed a context switch, resulting in an RCU-sched
+ * grace period. We are then done, so we use atomic_cmpxchg() to
+ * update sync_sched_expedited_done to match our snapshot -- but
+ * only if someone else has not already advanced past our snapshot.
+ *
+ * On the other hand, if try_stop_cpus() fails, we check the value
+ * of sync_sched_expedited_done. If it has advanced past our
+ * initial snapshot, then someone else must have forced a grace period
+ * some time after we took our snapshot. In this case, our work is
+ * done for us, and we can simply return. Otherwise, we try again,
+ * but keep our initial snapshot for purposes of checking for someone
+ * doing our work for us.
+ *
+ * If we fail too many times in a row, we fall back to synchronize_sched().
+ */
+void synchronize_sched_expedited(void)
+{
+ int firstsnap, s, snap, trycount = 0;
+
+ /* Note that atomic_inc_return() implies full memory barrier. */
+ firstsnap = snap = atomic_inc_return(&sync_sched_expedited_started);
+ get_online_cpus();
+
+ /*
+ * Each pass through the following loop attempts to force a
+ * context switch on each CPU.
+ */
+ while (try_stop_cpus(cpu_online_mask,
+ synchronize_sched_expedited_cpu_stop,
+ NULL) == -EAGAIN) {
+ put_online_cpus();
+
+ /* No joy, try again later. Or just synchronize_sched(). */
+ if (trycount++ < 10)
+ udelay(trycount * num_online_cpus());
+ else {
+ synchronize_sched();
+ return;
+ }
+
+ /* Check to see if someone else did our work for us. */
+ s = atomic_read(&sync_sched_expedited_done);
+ if (UINT_CMP_GE((unsigned)s, (unsigned)firstsnap)) {
+ smp_mb(); /* ensure test happens before caller kfree */
+ return;
+ }
+
+ /*
+ * Refetching sync_sched_expedited_started allows later
+ * callers to piggyback on our grace period. We subtract
+ * 1 to get the same token that the last incrementer got.
+ * We retry after they started, so our grace period works
+ * for them, and they started after our first try, so their
+ * grace period works for us.
+ */
+ get_online_cpus();
+ snap = atomic_read(&sync_sched_expedited_started) - 1;
+ smp_mb(); /* ensure read is before try_stop_cpus(). */
+ }
+
+ /*
+ * Everyone up to our most recent fetch is covered by our grace
+ * period. Update the counter, but only if our work is still
+ * relevant -- which it won't be if someone who started later
+ * than we did beat us to the punch.
+ */
+ do {
+ s = atomic_read(&sync_sched_expedited_done);
+ if (UINT_CMP_GE((unsigned)s, (unsigned)snap)) {
+ smp_mb(); /* ensure test happens before caller kfree */
+ break;
+ }
+ } while (atomic_cmpxchg(&sync_sched_expedited_done, s, snap) != s);
+
+ put_online_cpus();
+}
+EXPORT_SYMBOL_GPL(synchronize_sched_expedited);
+
+#endif /* #else #ifndef CONFIG_SMP */
+
#if !defined(CONFIG_RCU_FAST_NO_HZ)
/*
gpnum = rsp->gpnum;
seq_printf(m, "c=%lu g=%lu s=%d jfq=%ld j=%x "
- "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld\n",
+ "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu\n",
rsp->completed, gpnum, rsp->signaled,
(long)(rsp->jiffies_force_qs - jiffies),
(int)(jiffies & 0xffff),
rsp->n_force_qs, rsp->n_force_qs_ngp,
rsp->n_force_qs - rsp->n_force_qs_ngp,
- rsp->n_force_qs_lh, rsp->orphan_qlen);
+ rsp->n_force_qs_lh);
for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < NUM_RCU_NODES; rnp++) {
if (rnp->level != level) {
seq_puts(m, "\n");
static struct dentry *rcudir;
-static int __init rcuclassic_trace_init(void)
+static int __init rcutree_trace_init(void)
{
struct dentry *retval;
return 1;
}
-static void __exit rcuclassic_trace_cleanup(void)
+static void __exit rcutree_trace_cleanup(void)
{
debugfs_remove_recursive(rcudir);
}
-module_init(rcuclassic_trace_init);
-module_exit(rcuclassic_trace_cleanup);
+module_init(rcutree_trace_init);
+module_exit(rcutree_trace_cleanup);
MODULE_AUTHOR("Paul E. McKenney");
MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation");
#include <asm/tlb.h>
#include <asm/irq_regs.h>
+#include <asm/mutex.h>
#include "sched_cpupri.h"
#include "workqueue_sched.h"
+#include "sched_autogroup.h"
#define CREATE_TRACE_POINTS
#include <trace/events/sched.h>
/* runqueue "owned" by this group on each cpu */
struct cfs_rq **cfs_rq;
unsigned long shares;
+
+ atomic_t load_weight;
#endif
#ifdef CONFIG_RT_GROUP_SCHED
struct task_group *parent;
struct list_head siblings;
struct list_head children;
+
+#ifdef CONFIG_SCHED_AUTOGROUP
+ struct autogroup *autogroup;
+#endif
};
#define root_task_group init_task_group
-/* task_group_lock serializes add/remove of task groups and also changes to
- * a task group's cpu shares.
- */
+/* task_group_lock serializes the addition/removal of task groups */
static DEFINE_SPINLOCK(task_group_lock);
#ifdef CONFIG_FAIR_GROUP_SCHED
-#ifdef CONFIG_SMP
-static int root_task_group_empty(void)
-{
- return list_empty(&root_task_group.children);
-}
-#endif
-
# define INIT_TASK_GROUP_LOAD NICE_0_LOAD
/*
* leaf_cfs_rq_list ties together list of leaf cfs_rq's in a cpu. This
* list is used during load balance.
*/
+ int on_list;
struct list_head leaf_cfs_rq_list;
struct task_group *tg; /* group that "owns" this runqueue */
unsigned long h_load;
/*
- * this cpu's part of tg->shares
+ * Maintaining per-cpu shares distribution for group scheduling
+ *
+ * load_stamp is the last time we updated the load average
+ * load_last is the last time we updated the load average and saw load
+ * load_unacc_exec_time is currently unaccounted execution time
*/
- unsigned long shares;
+ u64 load_avg;
+ u64 load_period;
+ u64 load_stamp, load_last, load_unacc_exec_time;
- /*
- * load.weight at the time we set shares
- */
- unsigned long rq_weight;
+ unsigned long load_contribution;
#endif
#endif
};
*/
static inline struct task_group *task_group(struct task_struct *p)
{
+ struct task_group *tg;
struct cgroup_subsys_state *css;
css = task_subsys_state_check(p, cpu_cgroup_subsys_id,
lockdep_is_held(&task_rq(p)->lock));
- return container_of(css, struct task_group, css);
+ tg = container_of(css, struct task_group, css);
+
+ return autogroup_task_group(p, tg);
}
/* Change a task's cfs_rq and parent entity if it moves across CPUs/groups */
*/
const_debug unsigned int sysctl_sched_nr_migrate = 32;
-/*
- * ratelimit for updating the group shares.
- * default: 0.25ms
- */
-unsigned int sysctl_sched_shares_ratelimit = 250000;
-unsigned int normalized_sysctl_sched_shares_ratelimit = 250000;
-
-/*
- * Inject some fuzzyness into changing the per-cpu group shares
- * this avoids remote rq-locks at the expense of fairness.
- * default: 4
- */
-unsigned int sysctl_sched_shares_thresh = 4;
-
/*
* period over which we average the RT time consumption, measured
* in ms.
lw->inv_weight = 0;
}
+static inline void update_load_set(struct load_weight *lw, unsigned long w)
+{
+ lw->weight = w;
+ lw->inv_weight = 0;
+}
+
/*
* To aid in avoiding the subversion of "niceness" due to uneven distribution
* of tasks with abnormal "nice" values across CPUs the contribution that
#ifdef CONFIG_FAIR_GROUP_SCHED
-static __read_mostly unsigned long __percpu *update_shares_data;
-
-static void __set_se_shares(struct sched_entity *se, unsigned long shares);
-
-/*
- * Calculate and set the cpu's group shares.
- */
-static void update_group_shares_cpu(struct task_group *tg, int cpu,
- unsigned long sd_shares,
- unsigned long sd_rq_weight,
- unsigned long *usd_rq_weight)
-{
- unsigned long shares, rq_weight;
- int boost = 0;
-
- rq_weight = usd_rq_weight[cpu];
- if (!rq_weight) {
- boost = 1;
- rq_weight = NICE_0_LOAD;
- }
-
- /*
- * \Sum_j shares_j * rq_weight_i
- * shares_i = -----------------------------
- * \Sum_j rq_weight_j
- */
- shares = (sd_shares * rq_weight) / sd_rq_weight;
- shares = clamp_t(unsigned long, shares, MIN_SHARES, MAX_SHARES);
-
- if (abs(shares - tg->se[cpu]->load.weight) >
- sysctl_sched_shares_thresh) {
- struct rq *rq = cpu_rq(cpu);
- unsigned long flags;
-
- raw_spin_lock_irqsave(&rq->lock, flags);
- tg->cfs_rq[cpu]->rq_weight = boost ? 0 : rq_weight;
- tg->cfs_rq[cpu]->shares = boost ? 0 : shares;
- __set_se_shares(tg->se[cpu], shares);
- raw_spin_unlock_irqrestore(&rq->lock, flags);
- }
-}
-
-/*
- * Re-compute the task group their per cpu shares over the given domain.
- * This needs to be done in a bottom-up fashion because the rq weight of a
- * parent group depends on the shares of its child groups.
- */
-static int tg_shares_up(struct task_group *tg, void *data)
-{
- unsigned long weight, rq_weight = 0, sum_weight = 0, shares = 0;
- unsigned long *usd_rq_weight;
- struct sched_domain *sd = data;
- unsigned long flags;
- int i;
-
- if (!tg->se[0])
- return 0;
-
- local_irq_save(flags);
- usd_rq_weight = per_cpu_ptr(update_shares_data, smp_processor_id());
-
- for_each_cpu(i, sched_domain_span(sd)) {
- weight = tg->cfs_rq[i]->load.weight;
- usd_rq_weight[i] = weight;
-
- rq_weight += weight;
- /*
- * If there are currently no tasks on the cpu pretend there
- * is one of average load so that when a new task gets to
- * run here it will not get delayed by group starvation.
- */
- if (!weight)
- weight = NICE_0_LOAD;
-
- sum_weight += weight;
- shares += tg->cfs_rq[i]->shares;
- }
-
- if (!rq_weight)
- rq_weight = sum_weight;
-
- if ((!shares && rq_weight) || shares > tg->shares)
- shares = tg->shares;
-
- if (!sd->parent || !(sd->parent->flags & SD_LOAD_BALANCE))
- shares = tg->shares;
-
- for_each_cpu(i, sched_domain_span(sd))
- update_group_shares_cpu(tg, i, shares, rq_weight, usd_rq_weight);
-
- local_irq_restore(flags);
-
- return 0;
-}
-
/*
* Compute the cpu's hierarchical load factor for each task group.
* This needs to be done in a top-down fashion because the load of a child
load = cpu_rq(cpu)->load.weight;
} else {
load = tg->parent->cfs_rq[cpu]->h_load;
- load *= tg->cfs_rq[cpu]->shares;
+ load *= tg->se[cpu]->load.weight;
load /= tg->parent->cfs_rq[cpu]->load.weight + 1;
}
return 0;
}
-static void update_shares(struct sched_domain *sd)
-{
- s64 elapsed;
- u64 now;
-
- if (root_task_group_empty())
- return;
-
- now = local_clock();
- elapsed = now - sd->last_update;
-
- if (elapsed >= (s64)(u64)sysctl_sched_shares_ratelimit) {
- sd->last_update = now;
- walk_tg_tree(tg_nop, tg_shares_up, sd);
- }
-}
-
static void update_h_load(long cpu)
{
walk_tg_tree(tg_load_down, tg_nop, (void *)cpu);
}
-#else
-
-static inline void update_shares(struct sched_domain *sd)
-{
-}
-
#endif
#ifdef CONFIG_PREEMPT
#endif
-#ifdef CONFIG_FAIR_GROUP_SCHED
-static void cfs_rq_set_shares(struct cfs_rq *cfs_rq, unsigned long shares)
-{
-#ifdef CONFIG_SMP
- cfs_rq->shares = shares;
-#endif
-}
-#endif
-
static void calc_load_account_idle(struct rq *this_rq);
static void update_sysctl(void);
static int get_update_sysctl_factor(void);
#include "sched_idletask.c"
#include "sched_fair.c"
#include "sched_rt.c"
+#include "sched_autogroup.c"
#include "sched_stoptask.c"
#ifdef CONFIG_SCHED_DEBUG
# include "sched_debug.c"
* The task's runqueue lock must be held.
* Returns true if you have to wait for migration thread.
*/
-static bool migrate_task(struct task_struct *p, int dest_cpu)
+static bool migrate_task(struct task_struct *p, struct rq *rq)
{
- struct rq *rq = task_rq(p);
-
/*
* If the task is not on a runqueue (and not running), then
* the next wake-up will properly place the task.
return dest_cpu;
/* No more Mr. Nice Guy. */
- if (unlikely(dest_cpu >= nr_cpu_ids)) {
- dest_cpu = cpuset_cpus_allowed_fallback(p);
- /*
- * Don't tell them about moving exiting tasks or
- * kernel threads (both mm NULL), since they never
- * leave kernel.
- */
- if (p->mm && printk_ratelimit()) {
- printk(KERN_INFO "process %d (%s) no "
- "longer affine to cpu%d\n",
- task_pid_nr(p), p->comm, cpu);
- }
+ dest_cpu = cpuset_cpus_allowed_fallback(p);
+ /*
+ * Don't tell them about moving exiting tasks or
+ * kernel threads (both mm NULL), since they never
+ * leave kernel.
+ */
+ if (p->mm && printk_ratelimit()) {
+ printk(KERN_INFO "process %d (%s) no longer affine to cpu%d\n",
+ task_pid_nr(p), p->comm, cpu);
}
return dest_cpu;
/* Want to start with kernel preemption disabled. */
task_thread_info(p)->preempt_count = 1;
#endif
+#ifdef CONFIG_SMP
plist_node_init(&p->pushable_tasks, MAX_PRIO);
+#endif
put_cpu();
}
* select_task_rq() can race against ->cpus_allowed
*/
if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed) &&
- likely(cpu_active(dest_cpu)) && migrate_task(p, dest_cpu)) {
+ likely(cpu_active(dest_cpu)) && migrate_task(p, rq)) {
struct migration_arg arg = { p, dest_cpu };
task_rq_unlock(rq, &flags);
if (task_thread_info(rq->curr) != owner || need_resched())
return 0;
- cpu_relax();
+ arch_mutex_cpu_relax();
}
return 1;
* This waits for either a completion of a specific task to be signaled or for a
* specified timeout to expire. It is interruptible. The timeout is in jiffies.
*/
-unsigned long __sched
+long __sched
wait_for_completion_interruptible_timeout(struct completion *x,
unsigned long timeout)
{
* signaled or for a specified timeout to expire. It can be
* interrupted by a kill signal. The timeout is in jiffies.
*/
-unsigned long __sched
+long __sched
wait_for_completion_killable_timeout(struct completion *x,
unsigned long timeout)
{
}
static int __sched_setscheduler(struct task_struct *p, int policy,
- struct sched_param *param, bool user)
+ const struct sched_param *param, bool user)
{
int retval, oldprio, oldpolicy = -1, on_rq, running;
unsigned long flags;
* NOTE that the task may be already dead.
*/
int sched_setscheduler(struct task_struct *p, int policy,
- struct sched_param *param)
+ const struct sched_param *param)
{
return __sched_setscheduler(p, policy, param, true);
}
* but our caller might not have that capability.
*/
int sched_setscheduler_nocheck(struct task_struct *p, int policy,
- struct sched_param *param)
+ const struct sched_param *param)
{
return __sched_setscheduler(p, policy, param, false);
}
unsigned state;
state = p->state ? __ffs(p->state) + 1 : 0;
- printk(KERN_INFO "%-13.13s %c", p->comm,
+ printk(KERN_INFO "%-15.15s %c", p->comm,
state < sizeof(stat_nam) - 1 ? stat_nam[state] : '?');
#if BITS_PER_LONG == 32
if (state == TASK_RUNNING)
SET_SYSCTL(sched_min_granularity);
SET_SYSCTL(sched_latency);
SET_SYSCTL(sched_wakeup_granularity);
- SET_SYSCTL(sched_shares_ratelimit);
#undef SET_SYSCTL
}
goto out;
dest_cpu = cpumask_any_and(cpu_active_mask, new_mask);
- if (migrate_task(p, dest_cpu)) {
+ if (migrate_task(p, rq)) {
struct migration_arg arg = { p, dest_cpu };
/* Need help from migration thread: drop lock and wait. */
task_rq_unlock(rq, &flags);
}
#ifdef CONFIG_HOTPLUG_CPU
+
/*
- * Figure out where task on dead CPU should go, use force if necessary.
+ * Ensures that the idle task is using init_mm right before its cpu goes
+ * offline.
*/
-void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
+void idle_task_exit(void)
{
- struct rq *rq = cpu_rq(dead_cpu);
- int needs_cpu, uninitialized_var(dest_cpu);
- unsigned long flags;
+ struct mm_struct *mm = current->active_mm;
- local_irq_save(flags);
+ BUG_ON(cpu_online(smp_processor_id()));
- raw_spin_lock(&rq->lock);
- needs_cpu = (task_cpu(p) == dead_cpu) && (p->state != TASK_WAKING);
- if (needs_cpu)
- dest_cpu = select_fallback_rq(dead_cpu, p);
- raw_spin_unlock(&rq->lock);
- /*
- * It can only fail if we race with set_cpus_allowed(),
- * in the racer should migrate the task anyway.
- */
- if (needs_cpu)
- __migrate_task(p, dead_cpu, dest_cpu);
- local_irq_restore(flags);
+ if (mm != &init_mm)
+ switch_mm(mm, &init_mm, current);
+ mmdrop(mm);
}
/*
static void migrate_nr_uninterruptible(struct rq *rq_src)
{
struct rq *rq_dest = cpu_rq(cpumask_any(cpu_active_mask));
- unsigned long flags;
- local_irq_save(flags);
- double_rq_lock(rq_src, rq_dest);
rq_dest->nr_uninterruptible += rq_src->nr_uninterruptible;
rq_src->nr_uninterruptible = 0;
- double_rq_unlock(rq_src, rq_dest);
- local_irq_restore(flags);
-}
-
-/* Run through task list and migrate tasks from the dead cpu. */
-static void migrate_live_tasks(int src_cpu)
-{
- struct task_struct *p, *t;
-
- read_lock(&tasklist_lock);
-
- do_each_thread(t, p) {
- if (p == current)
- continue;
-
- if (task_cpu(p) == src_cpu)
- move_task_off_dead_cpu(src_cpu, p);
- } while_each_thread(t, p);
-
- read_unlock(&tasklist_lock);
}
/*
- * Schedules idle task to be the next runnable task on current CPU.
- * It does so by boosting its priority to highest possible.
- * Used by CPU offline code.
+ * remove the tasks which were accounted by rq from calc_load_tasks.
*/
-void sched_idle_next(void)
+static void calc_global_load_remove(struct rq *rq)
{
- int this_cpu = smp_processor_id();
- struct rq *rq = cpu_rq(this_cpu);
- struct task_struct *p = rq->idle;
- unsigned long flags;
-
- /* cpu has to be offline */
- BUG_ON(cpu_online(this_cpu));
-
- /*
- * Strictly not necessary since rest of the CPUs are stopped by now
- * and interrupts disabled on the current cpu.
- */
- raw_spin_lock_irqsave(&rq->lock, flags);
-
- __setscheduler(rq, p, SCHED_FIFO, MAX_RT_PRIO-1);
-
- activate_task(rq, p, 0);
-
- raw_spin_unlock_irqrestore(&rq->lock, flags);
+ atomic_long_sub(rq->calc_load_active, &calc_load_tasks);
+ rq->calc_load_active = 0;
}
/*
- * Ensures that the idle task is using init_mm right before its cpu goes
- * offline.
+ * Migrate all tasks from the rq, sleeping tasks will be migrated by
+ * try_to_wake_up()->select_task_rq().
+ *
+ * Called with rq->lock held even though we'er in stop_machine() and
+ * there's no concurrency possible, we hold the required locks anyway
+ * because of lock validation efforts.
*/
-void idle_task_exit(void)
-{
- struct mm_struct *mm = current->active_mm;
-
- BUG_ON(cpu_online(smp_processor_id()));
-
- if (mm != &init_mm)
- switch_mm(mm, &init_mm, current);
- mmdrop(mm);
-}
-
-/* called under rq->lock with disabled interrupts */
-static void migrate_dead(unsigned int dead_cpu, struct task_struct *p)
+static void migrate_tasks(unsigned int dead_cpu)
{
struct rq *rq = cpu_rq(dead_cpu);
-
- /* Must be exiting, otherwise would be on tasklist. */
- BUG_ON(!p->exit_state);
-
- /* Cannot have done final schedule yet: would have vanished. */
- BUG_ON(p->state == TASK_DEAD);
-
- get_task_struct(p);
+ struct task_struct *next, *stop = rq->stop;
+ int dest_cpu;
/*
- * Drop lock around migration; if someone else moves it,
- * that's OK. No task can be added to this CPU, so iteration is
- * fine.
+ * Fudge the rq selection such that the below task selection loop
+ * doesn't get stuck on the currently eligible stop task.
+ *
+ * We're currently inside stop_machine() and the rq is either stuck
+ * in the stop_machine_cpu_stop() loop, or we're executing this code,
+ * either way we should never end up calling schedule() until we're
+ * done here.
*/
- raw_spin_unlock_irq(&rq->lock);
- move_task_off_dead_cpu(dead_cpu, p);
- raw_spin_lock_irq(&rq->lock);
-
- put_task_struct(p);
-}
-
-/* release_task() removes task from tasklist, so we won't find dead tasks. */
-static void migrate_dead_tasks(unsigned int dead_cpu)
-{
- struct rq *rq = cpu_rq(dead_cpu);
- struct task_struct *next;
+ rq->stop = NULL;
for ( ; ; ) {
- if (!rq->nr_running)
+ /*
+ * There's this thread running, bail when that's the only
+ * remaining thread.
+ */
+ if (rq->nr_running == 1)
break;
+
next = pick_next_task(rq);
- if (!next)
- break;
+ BUG_ON(!next);
next->sched_class->put_prev_task(rq, next);
- migrate_dead(dead_cpu, next);
+ /* Find suitable destination for @next, with force if needed. */
+ dest_cpu = select_fallback_rq(dead_cpu, next);
+ raw_spin_unlock(&rq->lock);
+
+ __migrate_task(next, dead_cpu, dest_cpu);
+
+ raw_spin_lock(&rq->lock);
}
-}
-/*
- * 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);
- rq->calc_load_active = 0;
+ rq->stop = stop;
}
+
#endif /* CONFIG_HOTPLUG_CPU */
#if defined(CONFIG_SCHED_DEBUG) && defined(CONFIG_SYSCTL)
unsigned long flags;
struct rq *rq = cpu_rq(cpu);
- switch (action) {
+ switch (action & ~CPU_TASKS_FROZEN) {
case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
rq->calc_load_update = calc_load_update;
break;
case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
/* Update our root-domain */
raw_spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
break;
#ifdef CONFIG_HOTPLUG_CPU
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- migrate_live_tasks(cpu);
- /* Idle task back to normal (off runqueue, low prio) */
- raw_spin_lock_irq(&rq->lock);
- deactivate_task(rq, rq->idle, 0);
- __setscheduler(rq, rq->idle, SCHED_NORMAL, 0);
- rq->idle->sched_class = &idle_sched_class;
- migrate_dead_tasks(cpu);
- raw_spin_unlock_irq(&rq->lock);
- migrate_nr_uninterruptible(rq);
- BUG_ON(rq->nr_running != 0);
- calc_global_load_remove(rq);
- break;
-
case CPU_DYING:
- case CPU_DYING_FROZEN:
/* Update our root-domain */
raw_spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
set_rq_offline(rq);
}
+ migrate_tasks(cpu);
+ BUG_ON(rq->nr_running != 1); /* the migration thread */
raw_spin_unlock_irqrestore(&rq->lock, flags);
+
+ migrate_nr_uninterruptible(rq);
+ calc_global_load_remove(rq);
break;
#endif
}
#ifdef CONFIG_FAIR_GROUP_SCHED
static void init_tg_cfs_entry(struct task_group *tg, struct cfs_rq *cfs_rq,
- struct sched_entity *se, int cpu, int add,
+ struct sched_entity *se, int cpu,
struct sched_entity *parent)
{
struct rq *rq = cpu_rq(cpu);
tg->cfs_rq[cpu] = cfs_rq;
init_cfs_rq(cfs_rq, rq);
cfs_rq->tg = tg;
- if (add)
- list_add(&cfs_rq->leaf_cfs_rq_list, &rq->leaf_cfs_rq_list);
tg->se[cpu] = se;
/* se could be NULL for init_task_group */
se->cfs_rq = parent->my_q;
se->my_q = cfs_rq;
- se->load.weight = tg->shares;
- se->load.inv_weight = 0;
+ update_load_set(&se->load, 0);
se->parent = parent;
}
#endif
#ifdef CONFIG_RT_GROUP_SCHED
static void init_tg_rt_entry(struct task_group *tg, struct rt_rq *rt_rq,
- struct sched_rt_entity *rt_se, int cpu, int add,
+ struct sched_rt_entity *rt_se, int cpu,
struct sched_rt_entity *parent)
{
struct rq *rq = cpu_rq(cpu);
init_rt_rq(rt_rq, rq);
rt_rq->tg = tg;
rt_rq->rt_runtime = tg->rt_bandwidth.rt_runtime;
- if (add)
- list_add(&rt_rq->leaf_rt_rq_list, &rq->leaf_rt_rq_list);
tg->rt_se[cpu] = rt_se;
if (!rt_se)
#ifdef CONFIG_CGROUP_SCHED
list_add(&init_task_group.list, &task_groups);
INIT_LIST_HEAD(&init_task_group.children);
-
+ autogroup_init(&init_task);
#endif /* CONFIG_CGROUP_SCHED */
-#if defined CONFIG_FAIR_GROUP_SCHED && defined CONFIG_SMP
- update_shares_data = __alloc_percpu(nr_cpu_ids * sizeof(unsigned long),
- __alignof__(unsigned long));
-#endif
for_each_possible_cpu(i) {
struct rq *rq;
#ifdef CONFIG_FAIR_GROUP_SCHED
init_task_group.shares = init_task_group_load;
INIT_LIST_HEAD(&rq->leaf_cfs_rq_list);
-#ifdef CONFIG_CGROUP_SCHED
/*
* How much cpu bandwidth does init_task_group get?
*
* We achieve this by letting init_task_group's tasks sit
* directly in rq->cfs (i.e init_task_group->se[] = NULL).
*/
- init_tg_cfs_entry(&init_task_group, &rq->cfs, NULL, i, 1, NULL);
-#endif
+ init_tg_cfs_entry(&init_task_group, &rq->cfs, NULL, i, NULL);
#endif /* CONFIG_FAIR_GROUP_SCHED */
rq->rt.rt_runtime = def_rt_bandwidth.rt_runtime;
#ifdef CONFIG_RT_GROUP_SCHED
INIT_LIST_HEAD(&rq->leaf_rt_rq_list);
-#ifdef CONFIG_CGROUP_SCHED
- init_tg_rt_entry(&init_task_group, &rq->rt, NULL, i, 1, NULL);
-#endif
+ init_tg_rt_entry(&init_task_group, &rq->rt, NULL, i, NULL);
#endif
for (j = 0; j < CPU_LOAD_IDX_MAX; j++)
if (!se)
goto err_free_rq;
- init_tg_cfs_entry(tg, cfs_rq, se, i, 0, parent->se[i]);
+ init_tg_cfs_entry(tg, cfs_rq, se, i, parent->se[i]);
}
return 1;
return 0;
}
-static inline void register_fair_sched_group(struct task_group *tg, int cpu)
-{
- list_add_rcu(&tg->cfs_rq[cpu]->leaf_cfs_rq_list,
- &cpu_rq(cpu)->leaf_cfs_rq_list);
-}
-
static inline void unregister_fair_sched_group(struct task_group *tg, int cpu)
{
- list_del_rcu(&tg->cfs_rq[cpu]->leaf_cfs_rq_list);
+ struct rq *rq = cpu_rq(cpu);
+ unsigned long flags;
+
+ /*
+ * Only empty task groups can be destroyed; so we can speculatively
+ * check on_list without danger of it being re-added.
+ */
+ if (!tg->cfs_rq[cpu]->on_list)
+ return;
+
+ raw_spin_lock_irqsave(&rq->lock, flags);
+ list_del_leaf_cfs_rq(tg->cfs_rq[cpu]);
+ raw_spin_unlock_irqrestore(&rq->lock, flags);
}
#else /* !CONFG_FAIR_GROUP_SCHED */
static inline void free_fair_sched_group(struct task_group *tg)
return 1;
}
-static inline void register_fair_sched_group(struct task_group *tg, int cpu)
-{
-}
-
static inline void unregister_fair_sched_group(struct task_group *tg, int cpu)
{
}
if (!rt_se)
goto err_free_rq;
- init_tg_rt_entry(tg, rt_rq, rt_se, i, 0, parent->rt_se[i]);
+ init_tg_rt_entry(tg, rt_rq, rt_se, i, parent->rt_se[i]);
}
return 1;
err:
return 0;
}
-
-static inline void register_rt_sched_group(struct task_group *tg, int cpu)
-{
- list_add_rcu(&tg->rt_rq[cpu]->leaf_rt_rq_list,
- &cpu_rq(cpu)->leaf_rt_rq_list);
-}
-
-static inline void unregister_rt_sched_group(struct task_group *tg, int cpu)
-{
- list_del_rcu(&tg->rt_rq[cpu]->leaf_rt_rq_list);
-}
#else /* !CONFIG_RT_GROUP_SCHED */
static inline void free_rt_sched_group(struct task_group *tg)
{
{
return 1;
}
-
-static inline void register_rt_sched_group(struct task_group *tg, int cpu)
-{
-}
-
-static inline void unregister_rt_sched_group(struct task_group *tg, int cpu)
-{
-}
#endif /* CONFIG_RT_GROUP_SCHED */
#ifdef CONFIG_CGROUP_SCHED
{
struct task_group *tg;
unsigned long flags;
- int i;
tg = kzalloc(sizeof(*tg), GFP_KERNEL);
if (!tg)
goto err;
spin_lock_irqsave(&task_group_lock, flags);
- for_each_possible_cpu(i) {
- register_fair_sched_group(tg, i);
- register_rt_sched_group(tg, i);
- }
list_add_rcu(&tg->list, &task_groups);
WARN_ON(!parent); /* root should already exist */
unsigned long flags;
int i;
- spin_lock_irqsave(&task_group_lock, flags);
- for_each_possible_cpu(i) {
+ /* end participation in shares distribution */
+ for_each_possible_cpu(i)
unregister_fair_sched_group(tg, i);
- unregister_rt_sched_group(tg, i);
- }
+
+ spin_lock_irqsave(&task_group_lock, flags);
list_del_rcu(&tg->list);
list_del_rcu(&tg->siblings);
spin_unlock_irqrestore(&task_group_lock, flags);
#endif /* CONFIG_CGROUP_SCHED */
#ifdef CONFIG_FAIR_GROUP_SCHED
-static void __set_se_shares(struct sched_entity *se, unsigned long shares)
-{
- struct cfs_rq *cfs_rq = se->cfs_rq;
- int on_rq;
-
- on_rq = se->on_rq;
- if (on_rq)
- dequeue_entity(cfs_rq, se, 0);
-
- se->load.weight = shares;
- se->load.inv_weight = 0;
-
- if (on_rq)
- enqueue_entity(cfs_rq, se, 0);
-}
-
-static void set_se_shares(struct sched_entity *se, unsigned long shares)
-{
- struct cfs_rq *cfs_rq = se->cfs_rq;
- struct rq *rq = cfs_rq->rq;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&rq->lock, flags);
- __set_se_shares(se, shares);
- raw_spin_unlock_irqrestore(&rq->lock, flags);
-}
-
static DEFINE_MUTEX(shares_mutex);
int sched_group_set_shares(struct task_group *tg, unsigned long shares)
if (tg->shares == shares)
goto done;
- spin_lock_irqsave(&task_group_lock, flags);
- for_each_possible_cpu(i)
- unregister_fair_sched_group(tg, i);
- list_del_rcu(&tg->siblings);
- spin_unlock_irqrestore(&task_group_lock, flags);
-
- /* wait for any ongoing reference to this group to finish */
- synchronize_sched();
-
- /*
- * Now we are free to modify the group's share on each cpu
- * w/o tripping rebalance_share or load_balance_fair.
- */
tg->shares = shares;
for_each_possible_cpu(i) {
- /*
- * force a rebalance
- */
- cfs_rq_set_shares(tg->cfs_rq[i], 0);
- set_se_shares(tg->se[i], shares);
+ struct rq *rq = cpu_rq(i);
+ struct sched_entity *se;
+
+ se = tg->se[i];
+ /* Propagate contribution to hierarchy */
+ raw_spin_lock_irqsave(&rq->lock, flags);
+ for_each_sched_entity(se)
+ update_cfs_shares(group_cfs_rq(se), 0);
+ raw_spin_unlock_irqrestore(&rq->lock, flags);
}
- /*
- * Enable load balance activity on this group, by inserting it back on
- * each cpu's rq->leaf_cfs_rq_list.
- */
- spin_lock_irqsave(&task_group_lock, flags);
- for_each_possible_cpu(i)
- register_fair_sched_group(tg, i);
- list_add_rcu(&tg->siblings, &tg->parent->children);
- spin_unlock_irqrestore(&task_group_lock, flags);
done:
mutex_unlock(&shares_mutex);
return 0;
};
#endif /* CONFIG_CGROUP_CPUACCT */
-#ifndef CONFIG_SMP
-
-void synchronize_sched_expedited(void)
-{
- barrier();
-}
-EXPORT_SYMBOL_GPL(synchronize_sched_expedited);
-
-#else /* #ifndef CONFIG_SMP */
-
-static atomic_t synchronize_sched_expedited_count = ATOMIC_INIT(0);
-
-static int synchronize_sched_expedited_cpu_stop(void *data)
-{
- /*
- * There must be a full memory barrier on each affected CPU
- * between the time that try_stop_cpus() is called and the
- * time that it returns.
- *
- * In the current initial implementation of cpu_stop, the
- * above condition is already met when the control reaches
- * this point and the following smp_mb() is not strictly
- * necessary. Do smp_mb() anyway for documentation and
- * robustness against future implementation changes.
- */
- smp_mb(); /* See above comment block. */
- return 0;
-}
-
-/*
- * Wait for an rcu-sched grace period to elapse, but use "big hammer"
- * approach to force grace period to end quickly. This consumes
- * significant time on all CPUs, and is thus not recommended for
- * any sort of common-case code.
- *
- * Note that it is illegal to call this function while holding any
- * lock that is acquired by a CPU-hotplug notifier. Failing to
- * observe this restriction will result in deadlock.
- */
-void synchronize_sched_expedited(void)
-{
- int snap, trycount = 0;
-
- smp_mb(); /* ensure prior mod happens before capturing snap. */
- snap = atomic_read(&synchronize_sched_expedited_count) + 1;
- get_online_cpus();
- while (try_stop_cpus(cpu_online_mask,
- synchronize_sched_expedited_cpu_stop,
- NULL) == -EAGAIN) {
- put_online_cpus();
- if (trycount++ < 10)
- udelay(trycount * num_online_cpus());
- else {
- synchronize_sched();
- return;
- }
- if (atomic_read(&synchronize_sched_expedited_count) - snap > 0) {
- smp_mb(); /* ensure test happens before caller kfree */
- return;
- }
- get_online_cpus();
- }
- atomic_inc(&synchronize_sched_expedited_count);
- smp_mb__after_atomic_inc(); /* ensure post-GP actions seen after GP. */
- put_online_cpus();
-}
-EXPORT_SYMBOL_GPL(synchronize_sched_expedited);
-
-#endif /* #else #ifndef CONFIG_SMP */
--- /dev/null
+#ifdef CONFIG_SCHED_AUTOGROUP
+
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/kallsyms.h>
+#include <linux/utsname.h>
+
+unsigned int __read_mostly sysctl_sched_autogroup_enabled = 1;
+static struct autogroup autogroup_default;
+static atomic_t autogroup_seq_nr;
+
+static void autogroup_init(struct task_struct *init_task)
+{
+ autogroup_default.tg = &init_task_group;
+ init_task_group.autogroup = &autogroup_default;
+ kref_init(&autogroup_default.kref);
+ init_rwsem(&autogroup_default.lock);
+ init_task->signal->autogroup = &autogroup_default;
+}
+
+static inline void autogroup_free(struct task_group *tg)
+{
+ kfree(tg->autogroup);
+}
+
+static inline void autogroup_destroy(struct kref *kref)
+{
+ struct autogroup *ag = container_of(kref, struct autogroup, kref);
+
+ sched_destroy_group(ag->tg);
+}
+
+static inline void autogroup_kref_put(struct autogroup *ag)
+{
+ kref_put(&ag->kref, autogroup_destroy);
+}
+
+static inline struct autogroup *autogroup_kref_get(struct autogroup *ag)
+{
+ kref_get(&ag->kref);
+ return ag;
+}
+
+static inline struct autogroup *autogroup_task_get(struct task_struct *p)
+{
+ struct autogroup *ag;
+ unsigned long flags;
+
+ if (!lock_task_sighand(p, &flags))
+ return autogroup_kref_get(&autogroup_default);
+
+ ag = autogroup_kref_get(p->signal->autogroup);
+ unlock_task_sighand(p, &flags);
+
+ return ag;
+}
+
+static inline struct autogroup *autogroup_create(void)
+{
+ struct autogroup *ag = kzalloc(sizeof(*ag), GFP_KERNEL);
+ struct task_group *tg;
+
+ if (!ag)
+ goto out_fail;
+
+ tg = sched_create_group(&init_task_group);
+
+ if (IS_ERR(tg))
+ goto out_free;
+
+ kref_init(&ag->kref);
+ init_rwsem(&ag->lock);
+ ag->id = atomic_inc_return(&autogroup_seq_nr);
+ ag->tg = tg;
+ tg->autogroup = ag;
+
+ return ag;
+
+out_free:
+ kfree(ag);
+out_fail:
+ if (printk_ratelimit()) {
+ printk(KERN_WARNING "autogroup_create: %s failure.\n",
+ ag ? "sched_create_group()" : "kmalloc()");
+ }
+
+ return autogroup_kref_get(&autogroup_default);
+}
+
+static inline bool
+task_wants_autogroup(struct task_struct *p, struct task_group *tg)
+{
+ if (tg != &root_task_group)
+ return false;
+
+ if (p->sched_class != &fair_sched_class)
+ return false;
+
+ /*
+ * We can only assume the task group can't go away on us if
+ * autogroup_move_group() can see us on ->thread_group list.
+ */
+ if (p->flags & PF_EXITING)
+ return false;
+
+ return true;
+}
+
+static inline struct task_group *
+autogroup_task_group(struct task_struct *p, struct task_group *tg)
+{
+ int enabled = ACCESS_ONCE(sysctl_sched_autogroup_enabled);
+
+ if (enabled && task_wants_autogroup(p, tg))
+ return p->signal->autogroup->tg;
+
+ return tg;
+}
+
+static void
+autogroup_move_group(struct task_struct *p, struct autogroup *ag)
+{
+ struct autogroup *prev;
+ struct task_struct *t;
+ unsigned long flags;
+
+ BUG_ON(!lock_task_sighand(p, &flags));
+
+ prev = p->signal->autogroup;
+ if (prev == ag) {
+ unlock_task_sighand(p, &flags);
+ return;
+ }
+
+ p->signal->autogroup = autogroup_kref_get(ag);
+
+ t = p;
+ do {
+ sched_move_task(t);
+ } while_each_thread(p, t);
+
+ unlock_task_sighand(p, &flags);
+ autogroup_kref_put(prev);
+}
+
+/* Allocates GFP_KERNEL, cannot be called under any spinlock */
+void sched_autogroup_create_attach(struct task_struct *p)
+{
+ struct autogroup *ag = autogroup_create();
+
+ autogroup_move_group(p, ag);
+ /* drop extra refrence added by autogroup_create() */
+ autogroup_kref_put(ag);
+}
+EXPORT_SYMBOL(sched_autogroup_create_attach);
+
+/* Cannot be called under siglock. Currently has no users */
+void sched_autogroup_detach(struct task_struct *p)
+{
+ autogroup_move_group(p, &autogroup_default);
+}
+EXPORT_SYMBOL(sched_autogroup_detach);
+
+void sched_autogroup_fork(struct signal_struct *sig)
+{
+ sig->autogroup = autogroup_task_get(current);
+}
+
+void sched_autogroup_exit(struct signal_struct *sig)
+{
+ autogroup_kref_put(sig->autogroup);
+}
+
+static int __init setup_autogroup(char *str)
+{
+ sysctl_sched_autogroup_enabled = 0;
+
+ return 1;
+}
+
+__setup("noautogroup", setup_autogroup);
+
+#ifdef CONFIG_PROC_FS
+
+int proc_sched_autogroup_set_nice(struct task_struct *p, int *nice)
+{
+ static unsigned long next = INITIAL_JIFFIES;
+ struct autogroup *ag;
+ int err;
+
+ if (*nice < -20 || *nice > 19)
+ return -EINVAL;
+
+ err = security_task_setnice(current, *nice);
+ if (err)
+ return err;
+
+ if (*nice < 0 && !can_nice(current, *nice))
+ return -EPERM;
+
+ /* this is a heavy operation taking global locks.. */
+ if (!capable(CAP_SYS_ADMIN) && time_before(jiffies, next))
+ return -EAGAIN;
+
+ next = HZ / 10 + jiffies;
+ ag = autogroup_task_get(p);
+
+ down_write(&ag->lock);
+ err = sched_group_set_shares(ag->tg, prio_to_weight[*nice + 20]);
+ if (!err)
+ ag->nice = *nice;
+ up_write(&ag->lock);
+
+ autogroup_kref_put(ag);
+
+ return err;
+}
+
+void proc_sched_autogroup_show_task(struct task_struct *p, struct seq_file *m)
+{
+ struct autogroup *ag = autogroup_task_get(p);
+
+ down_read(&ag->lock);
+ seq_printf(m, "/autogroup-%ld nice %d\n", ag->id, ag->nice);
+ up_read(&ag->lock);
+
+ autogroup_kref_put(ag);
+}
+#endif /* CONFIG_PROC_FS */
+
+#ifdef CONFIG_SCHED_DEBUG
+static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
+{
+ return snprintf(buf, buflen, "%s-%ld", "/autogroup", tg->autogroup->id);
+}
+#endif /* CONFIG_SCHED_DEBUG */
+
+#endif /* CONFIG_SCHED_AUTOGROUP */
--- /dev/null
+#ifdef CONFIG_SCHED_AUTOGROUP
+
+struct autogroup {
+ struct kref kref;
+ struct task_group *tg;
+ struct rw_semaphore lock;
+ unsigned long id;
+ int nice;
+};
+
+static inline struct task_group *
+autogroup_task_group(struct task_struct *p, struct task_group *tg);
+
+#else /* !CONFIG_SCHED_AUTOGROUP */
+
+static inline void autogroup_init(struct task_struct *init_task) { }
+static inline void autogroup_free(struct task_group *tg) { }
+
+static inline struct task_group *
+autogroup_task_group(struct task_struct *p, struct task_group *tg)
+{
+ return tg;
+}
+
+#ifdef CONFIG_SCHED_DEBUG
+static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
+{
+ return 0;
+}
+#endif
+
+#endif /* CONFIG_SCHED_AUTOGROUP */
}
EXPORT_SYMBOL_GPL(sched_clock);
-static __read_mostly int sched_clock_running;
+__read_mostly int sched_clock_running;
#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
__read_mostly int sched_clock_stable;
#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
#ifdef CONFIG_FAIR_GROUP_SCHED
-static void print_cfs_group_stats(struct seq_file *m, int cpu,
- struct task_group *tg)
+static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
{
struct sched_entity *se = tg->se[cpu];
if (!se)
0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
#endif
-#ifdef CONFIG_CGROUP_SCHED
- {
- char path[64];
-
- rcu_read_lock();
- cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));
- rcu_read_unlock();
- SEQ_printf(m, " %s", path);
- }
-#endif
SEQ_printf(m, "\n");
}
read_unlock_irqrestore(&tasklist_lock, flags);
}
-#if defined(CONFIG_CGROUP_SCHED) && \
- (defined(CONFIG_FAIR_GROUP_SCHED) || defined(CONFIG_RT_GROUP_SCHED))
-static void task_group_path(struct task_group *tg, char *buf, int buflen)
-{
- /* may be NULL if the underlying cgroup isn't fully-created yet */
- if (!tg->css.cgroup) {
- buf[0] = '\0';
- return;
- }
- cgroup_path(tg->css.cgroup, buf, buflen);
-}
-#endif
-
void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
{
s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
struct sched_entity *last;
unsigned long flags;
-#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED)
- char path[128];
- struct task_group *tg = cfs_rq->tg;
-
- task_group_path(tg, path, sizeof(path));
-
- SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path);
-#else
SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
-#endif
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
SPLIT_NS(cfs_rq->exec_clock));
spread0 = min_vruntime - rq0_min_vruntime;
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
SPLIT_NS(spread0));
- SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
- SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
-
SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
cfs_rq->nr_spread_over);
+ SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
+ SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
#ifdef CONFIG_FAIR_GROUP_SCHED
#ifdef CONFIG_SMP
- SEQ_printf(m, " .%-30s: %lu\n", "shares", cfs_rq->shares);
+ SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_avg",
+ SPLIT_NS(cfs_rq->load_avg));
+ SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_period",
+ SPLIT_NS(cfs_rq->load_period));
+ SEQ_printf(m, " .%-30s: %ld\n", "load_contrib",
+ cfs_rq->load_contribution);
+ SEQ_printf(m, " .%-30s: %d\n", "load_tg",
+ atomic_read(&cfs_rq->tg->load_weight));
#endif
+
print_cfs_group_stats(m, cpu, cfs_rq->tg);
#endif
}
void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
{
-#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED)
- char path[128];
- struct task_group *tg = rt_rq->tg;
-
- task_group_path(tg, path, sizeof(path));
-
- SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path);
-#else
SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
-#endif
-
#define P(x) \
SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
#undef P
}
+extern __read_mostly int sched_clock_running;
+
static void print_cpu(struct seq_file *m, int cpu)
{
struct rq *rq = cpu_rq(cpu);
static int sched_debug_show(struct seq_file *m, void *v)
{
- u64 now = ktime_to_ns(ktime_get());
+ u64 ktime, sched_clk, cpu_clk;
+ unsigned long flags;
int cpu;
- SEQ_printf(m, "Sched Debug Version: v0.09, %s %.*s\n",
+ local_irq_save(flags);
+ ktime = ktime_to_ns(ktime_get());
+ sched_clk = sched_clock();
+ cpu_clk = local_clock();
+ local_irq_restore(flags);
+
+ SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
init_utsname()->release,
(int)strcspn(init_utsname()->version, " "),
init_utsname()->version);
- SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));
+#define P(x) \
+ SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
+#define PN(x) \
+ SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
+ PN(ktime);
+ PN(sched_clk);
+ PN(cpu_clk);
+ P(jiffies);
+#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
+ P(sched_clock_stable);
+#endif
+#undef PN
+#undef P
+
+ SEQ_printf(m, "\n");
+ SEQ_printf(m, "sysctl_sched\n");
#define P(x) \
SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
#define PN(x) \
SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
- P(jiffies);
PN(sysctl_sched_latency);
PN(sysctl_sched_min_granularity);
PN(sysctl_sched_wakeup_granularity);
const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
+/*
+ * The exponential sliding window over which load is averaged for shares
+ * distribution.
+ * (default: 10msec)
+ */
+unsigned int __read_mostly sysctl_sched_shares_window = 10000000UL;
+
static const struct sched_class fair_sched_class;
/**************************************************************
return cfs_rq->tg->cfs_rq[this_cpu];
}
+static inline void list_add_leaf_cfs_rq(struct cfs_rq *cfs_rq)
+{
+ if (!cfs_rq->on_list) {
+ /*
+ * Ensure we either appear before our parent (if already
+ * enqueued) or force our parent to appear after us when it is
+ * enqueued. The fact that we always enqueue bottom-up
+ * reduces this to two cases.
+ */
+ if (cfs_rq->tg->parent &&
+ cfs_rq->tg->parent->cfs_rq[cpu_of(rq_of(cfs_rq))]->on_list) {
+ list_add_rcu(&cfs_rq->leaf_cfs_rq_list,
+ &rq_of(cfs_rq)->leaf_cfs_rq_list);
+ } else {
+ list_add_tail_rcu(&cfs_rq->leaf_cfs_rq_list,
+ &rq_of(cfs_rq)->leaf_cfs_rq_list);
+ }
+
+ cfs_rq->on_list = 1;
+ }
+}
+
+static inline void list_del_leaf_cfs_rq(struct cfs_rq *cfs_rq)
+{
+ if (cfs_rq->on_list) {
+ list_del_rcu(&cfs_rq->leaf_cfs_rq_list);
+ cfs_rq->on_list = 0;
+ }
+}
+
/* Iterate thr' all leaf cfs_rq's on a runqueue */
#define for_each_leaf_cfs_rq(rq, cfs_rq) \
list_for_each_entry_rcu(cfs_rq, &rq->leaf_cfs_rq_list, leaf_cfs_rq_list)
return &cpu_rq(this_cpu)->cfs;
}
+static inline void list_add_leaf_cfs_rq(struct cfs_rq *cfs_rq)
+{
+}
+
+static inline void list_del_leaf_cfs_rq(struct cfs_rq *cfs_rq)
+{
+}
+
#define for_each_leaf_cfs_rq(rq, cfs_rq) \
for (cfs_rq = &rq->cfs; cfs_rq; cfs_rq = NULL)
WRT_SYSCTL(sched_min_granularity);
WRT_SYSCTL(sched_latency);
WRT_SYSCTL(sched_wakeup_granularity);
- WRT_SYSCTL(sched_shares_ratelimit);
#undef WRT_SYSCTL
return 0;
return calc_delta_fair(sched_slice(cfs_rq, se), se);
}
+static void update_cfs_load(struct cfs_rq *cfs_rq, int global_update);
+static void update_cfs_shares(struct cfs_rq *cfs_rq, long weight_delta);
+
/*
* Update the current task's runtime statistics. Skip current tasks that
* are not in our scheduling class.
curr->vruntime += delta_exec_weighted;
update_min_vruntime(cfs_rq);
+
+#if defined CONFIG_SMP && defined CONFIG_FAIR_GROUP_SCHED
+ cfs_rq->load_unacc_exec_time += delta_exec;
+#endif
}
static void update_curr(struct cfs_rq *cfs_rq)
list_add(&se->group_node, &cfs_rq->tasks);
}
cfs_rq->nr_running++;
- se->on_rq = 1;
}
static void
list_del_init(&se->group_node);
}
cfs_rq->nr_running--;
- se->on_rq = 0;
}
+#if defined CONFIG_SMP && defined CONFIG_FAIR_GROUP_SCHED
+static void update_cfs_rq_load_contribution(struct cfs_rq *cfs_rq,
+ int global_update)
+{
+ struct task_group *tg = cfs_rq->tg;
+ long load_avg;
+
+ load_avg = div64_u64(cfs_rq->load_avg, cfs_rq->load_period+1);
+ load_avg -= cfs_rq->load_contribution;
+
+ if (global_update || abs(load_avg) > cfs_rq->load_contribution / 8) {
+ atomic_add(load_avg, &tg->load_weight);
+ cfs_rq->load_contribution += load_avg;
+ }
+}
+
+static void update_cfs_load(struct cfs_rq *cfs_rq, int global_update)
+{
+ u64 period = sysctl_sched_shares_window;
+ u64 now, delta;
+ unsigned long load = cfs_rq->load.weight;
+
+ if (!cfs_rq)
+ return;
+
+ now = rq_of(cfs_rq)->clock;
+ delta = now - cfs_rq->load_stamp;
+
+ /* truncate load history at 4 idle periods */
+ if (cfs_rq->load_stamp > cfs_rq->load_last &&
+ now - cfs_rq->load_last > 4 * period) {
+ cfs_rq->load_period = 0;
+ cfs_rq->load_avg = 0;
+ }
+
+ cfs_rq->load_stamp = now;
+ cfs_rq->load_unacc_exec_time = 0;
+ cfs_rq->load_period += delta;
+ if (load) {
+ cfs_rq->load_last = now;
+ cfs_rq->load_avg += delta * load;
+ }
+
+ /* consider updating load contribution on each fold or truncate */
+ if (global_update || cfs_rq->load_period > period
+ || !cfs_rq->load_period)
+ update_cfs_rq_load_contribution(cfs_rq, global_update);
+
+ while (cfs_rq->load_period > period) {
+ /*
+ * Inline assembly required to prevent the compiler
+ * optimising this loop into a divmod call.
+ * See __iter_div_u64_rem() for another example of this.
+ */
+ asm("" : "+rm" (cfs_rq->load_period));
+ cfs_rq->load_period /= 2;
+ cfs_rq->load_avg /= 2;
+ }
+
+ if (!cfs_rq->curr && !cfs_rq->nr_running && !cfs_rq->load_avg)
+ list_del_leaf_cfs_rq(cfs_rq);
+}
+
+static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
+ unsigned long weight)
+{
+ if (se->on_rq) {
+ /* commit outstanding execution time */
+ if (cfs_rq->curr == se)
+ update_curr(cfs_rq);
+ account_entity_dequeue(cfs_rq, se);
+ }
+
+ update_load_set(&se->load, weight);
+
+ if (se->on_rq)
+ account_entity_enqueue(cfs_rq, se);
+}
+
+static void update_cfs_shares(struct cfs_rq *cfs_rq, long weight_delta)
+{
+ struct task_group *tg;
+ struct sched_entity *se;
+ long load_weight, load, shares;
+
+ if (!cfs_rq)
+ return;
+
+ tg = cfs_rq->tg;
+ se = tg->se[cpu_of(rq_of(cfs_rq))];
+ if (!se)
+ return;
+
+ load = cfs_rq->load.weight + weight_delta;
+
+ load_weight = atomic_read(&tg->load_weight);
+ load_weight -= cfs_rq->load_contribution;
+ load_weight += load;
+
+ shares = (tg->shares * load);
+ if (load_weight)
+ shares /= load_weight;
+
+ if (shares < MIN_SHARES)
+ shares = MIN_SHARES;
+ if (shares > tg->shares)
+ shares = tg->shares;
+
+ reweight_entity(cfs_rq_of(se), se, shares);
+}
+
+static void update_entity_shares_tick(struct cfs_rq *cfs_rq)
+{
+ if (cfs_rq->load_unacc_exec_time > sysctl_sched_shares_window) {
+ update_cfs_load(cfs_rq, 0);
+ update_cfs_shares(cfs_rq, 0);
+ }
+}
+#else /* CONFIG_FAIR_GROUP_SCHED */
+static void update_cfs_load(struct cfs_rq *cfs_rq, int global_update)
+{
+}
+
+static inline void update_cfs_shares(struct cfs_rq *cfs_rq, long weight_delta)
+{
+}
+
+static inline void update_entity_shares_tick(struct cfs_rq *cfs_rq)
+{
+}
+#endif /* CONFIG_FAIR_GROUP_SCHED */
+
static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
#ifdef CONFIG_SCHEDSTATS
* Update run-time statistics of the 'current'.
*/
update_curr(cfs_rq);
+ update_cfs_load(cfs_rq, 0);
+ update_cfs_shares(cfs_rq, se->load.weight);
account_entity_enqueue(cfs_rq, se);
if (flags & ENQUEUE_WAKEUP) {
check_spread(cfs_rq, se);
if (se != cfs_rq->curr)
__enqueue_entity(cfs_rq, se);
+ se->on_rq = 1;
+
+ if (cfs_rq->nr_running == 1)
+ list_add_leaf_cfs_rq(cfs_rq);
}
static void __clear_buddies(struct cfs_rq *cfs_rq, struct sched_entity *se)
if (se != cfs_rq->curr)
__dequeue_entity(cfs_rq, se);
+ se->on_rq = 0;
+ update_cfs_load(cfs_rq, 0);
account_entity_dequeue(cfs_rq, se);
update_min_vruntime(cfs_rq);
+ update_cfs_shares(cfs_rq, 0);
/*
* Normalize the entity after updating the min_vruntime because the
*/
update_curr(cfs_rq);
+ /*
+ * Update share accounting for long-running entities.
+ */
+ update_entity_shares_tick(cfs_rq);
+
#ifdef CONFIG_SCHED_HRTICK
/*
* queued ticks are scheduled to match the slice, so don't bother
flags = ENQUEUE_WAKEUP;
}
+ for_each_sched_entity(se) {
+ struct cfs_rq *cfs_rq = cfs_rq_of(se);
+
+ update_cfs_load(cfs_rq, 0);
+ update_cfs_shares(cfs_rq, 0);
+ }
+
hrtick_update(rq);
}
for_each_sched_entity(se) {
cfs_rq = cfs_rq_of(se);
dequeue_entity(cfs_rq, se, flags);
+
/* Don't dequeue parent if it has other entities besides us */
if (cfs_rq->load.weight)
break;
flags |= DEQUEUE_SLEEP;
}
+ for_each_sched_entity(se) {
+ struct cfs_rq *cfs_rq = cfs_rq_of(se);
+
+ update_cfs_load(cfs_rq, 0);
+ update_cfs_shares(cfs_rq, 0);
+ }
+
hrtick_update(rq);
}
* Adding load to a group doesn't make a group heavier, but can cause movement
* of group shares between cpus. Assuming the shares were perfectly aligned one
* can calculate the shift in shares.
- *
- * The problem is that perfectly aligning the shares is rather expensive, hence
- * we try to avoid doing that too often - see update_shares(), which ratelimits
- * this change.
- *
- * We compensate this by not only taking the current delta into account, but
- * also considering the delta between when the shares were last adjusted and
- * now.
- *
- * We still saw a performance dip, some tracing learned us that between
- * cgroup:/ and cgroup:/foo balancing the number of affine wakeups increased
- * significantly. Therefore try to bias the error in direction of failing
- * the affine wakeup.
- *
*/
-static long effective_load(struct task_group *tg, int cpu,
- long wl, long wg)
+static long effective_load(struct task_group *tg, int cpu, long wl, long wg)
{
struct sched_entity *se = tg->se[cpu];
if (!tg->parent)
return wl;
- /*
- * By not taking the decrease of shares on the other cpu into
- * account our error leans towards reducing the affine wakeups.
- */
- if (!wl && sched_feat(ASYM_EFF_LOAD))
- return wl;
-
for_each_sched_entity(se) {
long S, rw, s, a, b;
- long more_w;
-
- /*
- * Instead of using this increment, also add the difference
- * between when the shares were last updated and now.
- */
- more_w = se->my_q->load.weight - se->my_q->rq_weight;
- wl += more_w;
- wg += more_w;
S = se->my_q->tg->shares;
- s = se->my_q->shares;
- rw = se->my_q->rq_weight;
+ s = se->load.weight;
+ rw = se->my_q->load.weight;
a = S*(rw + wl);
b = S*rw + s*wg;
sd = tmp;
}
-#ifdef CONFIG_FAIR_GROUP_SCHED
- if (sched_feat(LB_SHARES_UPDATE)) {
- /*
- * Pick the largest domain to update shares over
- */
- tmp = sd;
- if (affine_sd && (!tmp || affine_sd->span_weight > sd->span_weight))
- tmp = affine_sd;
-
- if (tmp) {
- raw_spin_unlock(&rq->lock);
- update_shares(tmp);
- raw_spin_lock(&rq->lock);
- }
- }
-#endif
-
if (affine_sd) {
if (cpu == prev_cpu || wake_affine(affine_sd, p, sync))
return select_idle_sibling(p, cpu);
}
#ifdef CONFIG_FAIR_GROUP_SCHED
+/*
+ * update tg->load_weight by folding this cpu's load_avg
+ */
+static int update_shares_cpu(struct task_group *tg, int cpu)
+{
+ struct cfs_rq *cfs_rq;
+ unsigned long flags;
+ struct rq *rq;
+
+ if (!tg->se[cpu])
+ return 0;
+
+ rq = cpu_rq(cpu);
+ cfs_rq = tg->cfs_rq[cpu];
+
+ raw_spin_lock_irqsave(&rq->lock, flags);
+
+ update_rq_clock(rq);
+ update_cfs_load(cfs_rq, 1);
+
+ /*
+ * We need to update shares after updating tg->load_weight in
+ * order to adjust the weight of groups with long running tasks.
+ */
+ update_cfs_shares(cfs_rq, 0);
+
+ raw_spin_unlock_irqrestore(&rq->lock, flags);
+
+ return 0;
+}
+
+static void update_shares(int cpu)
+{
+ struct cfs_rq *cfs_rq;
+ struct rq *rq = cpu_rq(cpu);
+
+ rcu_read_lock();
+ for_each_leaf_cfs_rq(rq, cfs_rq)
+ update_shares_cpu(cfs_rq->tg, cpu);
+ rcu_read_unlock();
+}
+
static unsigned long
load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
unsigned long max_load_move,
return max_load_move - rem_load_move;
}
#else
+static inline void update_shares(int cpu)
+{
+}
+
static unsigned long
load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
unsigned long max_load_move,
schedstat_inc(sd, lb_count[idle]);
redo:
- update_shares(sd);
group = find_busiest_group(sd, this_cpu, &imbalance, idle, &sd_idle,
cpus, balance);
else
ld_moved = 0;
out:
- if (ld_moved)
- update_shares(sd);
return ld_moved;
}
*/
raw_spin_unlock(&this_rq->lock);
+ update_shares(this_cpu);
for_each_domain(this_cpu, sd) {
unsigned long interval;
int balance = 1;
int update_next_balance = 0;
int need_serialize;
+ update_shares(cpu);
+
for_each_domain(cpu, sd) {
if (!(sd->flags & SD_LOAD_BALANCE))
continue;
SCHED_FEAT(HRTICK, 0)
SCHED_FEAT(DOUBLE_TICK, 0)
SCHED_FEAT(LB_BIAS, 1)
-SCHED_FEAT(LB_SHARES_UPDATE, 1)
-SCHED_FEAT(ASYM_EFF_LOAD, 1)
/*
* Spin-wait on mutex acquisition when the mutex owner is running on
return ktime_to_ns(rt_rq->tg->rt_bandwidth.rt_period);
}
+static inline void list_add_leaf_rt_rq(struct rt_rq *rt_rq)
+{
+ list_add_rcu(&rt_rq->leaf_rt_rq_list,
+ &rq_of_rt_rq(rt_rq)->leaf_rt_rq_list);
+}
+
+static inline void list_del_leaf_rt_rq(struct rt_rq *rt_rq)
+{
+ list_del_rcu(&rt_rq->leaf_rt_rq_list);
+}
+
#define for_each_leaf_rt_rq(rt_rq, rq) \
list_for_each_entry_rcu(rt_rq, &rq->leaf_rt_rq_list, leaf_rt_rq_list)
return ktime_to_ns(def_rt_bandwidth.rt_period);
}
+static inline void list_add_leaf_rt_rq(struct rt_rq *rt_rq)
+{
+}
+
+static inline void list_del_leaf_rt_rq(struct rt_rq *rt_rq)
+{
+}
+
#define for_each_leaf_rt_rq(rt_rq, rq) \
for (rt_rq = &rq->rt; rt_rq; rt_rq = NULL)
if (group_rq && (rt_rq_throttled(group_rq) || !group_rq->rt_nr_running))
return;
+ if (!rt_rq->rt_nr_running)
+ list_add_leaf_rt_rq(rt_rq);
+
if (head)
list_add(&rt_se->run_list, queue);
else
__clear_bit(rt_se_prio(rt_se), array->bitmap);
dec_rt_tasks(rt_se, rt_rq);
+ if (!rt_rq->rt_nr_running)
+ list_del_leaf_rt_rq(rt_rq);
}
/*
cpumask_any(cpu_online_mask));
case CPU_DEAD:
case CPU_DEAD_FROZEN: {
- struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
+ static struct sched_param param = {
+ .sched_priority = MAX_RT_PRIO-1
+ };
p = per_cpu(ksoftirqd, hotcpu);
per_cpu(ksoftirqd, hotcpu) = NULL;
#include <linux/rcupdate.h>
#include <linux/sched.h>
#include <linux/smp.h>
+#include <linux/delay.h>
#include <linux/srcu.h>
static int init_srcu_struct_fields(struct srcu_struct *sp)
* all srcu_read_lock() calls using the old counters have completed.
* Their corresponding critical sections might well be still
* executing, but the srcu_read_lock() primitives themselves
- * will have finished executing.
+ * will have finished executing. We initially give readers
+ * an arbitrarily chosen 10 microseconds to get out of their
+ * SRCU read-side critical sections, then loop waiting 1/HZ
+ * seconds per iteration.
*/
+ if (srcu_readers_active_idx(sp, idx))
+ udelay(CONFIG_SRCU_SYNCHRONIZE_DELAY);
while (srcu_readers_active_idx(sp, idx))
schedule_timeout_interruptible(1);
err = session;
out:
write_unlock_irq(&tasklist_lock);
- if (err > 0)
+ if (err > 0) {
proc_sid_connector(group_leader);
+ sched_autogroup_create_attach(group_leader);
+ }
return err;
}
static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
-static int min_sched_shares_ratelimit = 100000; /* 100 usec */
-static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */
#endif
#ifdef CONFIG_COMPACTION
.extra1 = &min_wakeup_granularity_ns,
.extra2 = &max_wakeup_granularity_ns,
},
- {
- .procname = "sched_shares_ratelimit",
- .data = &sysctl_sched_shares_ratelimit,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_sched_shares_ratelimit,
- .extra2 = &max_sched_shares_ratelimit,
- },
{
.procname = "sched_tunable_scaling",
.data = &sysctl_sched_tunable_scaling,
.extra1 = &min_sched_tunable_scaling,
.extra2 = &max_sched_tunable_scaling,
},
- {
- .procname = "sched_shares_thresh",
- .data = &sysctl_sched_shares_thresh,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- },
{
.procname = "sched_migration_cost",
.data = &sysctl_sched_migration_cost,
.mode = 0644,
.proc_handler = proc_dointvec,
},
+ {
+ .procname = "sched_shares_window",
+ .data = &sysctl_sched_shares_window,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
{
.procname = "timer_migration",
.data = &sysctl_timer_migration,
.mode = 0644,
.proc_handler = proc_dointvec,
},
+#ifdef CONFIG_SCHED_AUTOGROUP
+ {
+ .procname = "sched_autogroup_enabled",
+ .data = &sysctl_sched_autogroup_enabled,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+#endif
#ifdef CONFIG_PROVE_LOCKING
{
.procname = "prove_locking",
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/math64.h>
+#include <linux/kernel.h>
/*
* fixed point arithmetic scale factor for skew
int index;
int num_samples = sync->num_samples;
- if (num_samples > sizeof(buffer)/sizeof(buffer[0])) {
+ if (num_samples > ARRAY_SIZE(buffer)) {
samples = kmalloc(sizeof(*samples) * num_samples, GFP_ATOMIC);
if (!samples) {
samples = buffer;
- num_samples = sizeof(buffer)/sizeof(buffer[0]);
+ num_samples = ARRAY_SIZE(buffer);
}
} else {
samples = buffer;
cycle_t cycle_interval;
/* Number of clock shifted nano seconds in one NTP interval. */
u64 xtime_interval;
+ /* shifted nano seconds left over when rounding cycle_interval */
+ s64 xtime_remainder;
/* Raw nano seconds accumulated per NTP interval. */
u32 raw_interval;
static void timekeeper_setup_internals(struct clocksource *clock)
{
cycle_t interval;
- u64 tmp;
+ u64 tmp, ntpinterval;
timekeeper.clock = clock;
clock->cycle_last = clock->read(clock);
/* Do the ns -> cycle conversion first, using original mult */
tmp = NTP_INTERVAL_LENGTH;
tmp <<= clock->shift;
+ ntpinterval = tmp;
tmp += clock->mult/2;
do_div(tmp, clock->mult);
if (tmp == 0)
/* Go back from cycles -> shifted ns */
timekeeper.xtime_interval = (u64) interval * clock->mult;
+ timekeeper.xtime_remainder = ntpinterval - timekeeper.xtime_interval;
timekeeper.raw_interval =
((u64) interval * clock->mult) >> clock->shift;
/* Accumulate error between NTP and clock interval */
timekeeper.ntp_error += tick_length << shift;
- timekeeper.ntp_error -= timekeeper.xtime_interval <<
+ timekeeper.ntp_error -=
+ (timekeeper.xtime_interval + timekeeper.xtime_remainder) <<
(timekeeper.ntp_error_shift + shift);
return offset;
{
struct hrtimer *timer, tmp;
unsigned long next = 0, i;
- struct rb_node *curr;
+ struct timerqueue_node *curr;
unsigned long flags;
next_one:
i = 0;
raw_spin_lock_irqsave(&base->cpu_base->lock, flags);
- curr = base->first;
+ curr = timerqueue_getnext(&base->active);
/*
* Crude but we have to do this O(N*N) thing, because
* we have to unlock the base when printing:
*/
while (curr && i < next) {
- curr = rb_next(curr);
+ curr = timerqueue_iterate_next(curr);
i++;
}
if (curr) {
- timer = rb_entry(curr, struct hrtimer, node);
+ timer = container_of(curr, struct hrtimer, node);
tmp = *timer;
raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
EXPORT_SYMBOL(boot_tvec_bases);
static DEFINE_PER_CPU(struct tvec_base *, tvec_bases) = &boot_tvec_bases;
-/*
- * Note that all tvec_bases are 2 byte aligned and lower bit of
- * base in timer_list is guaranteed to be zero. Use the LSB to
- * indicate whether the timer is deferrable.
- *
- * A deferrable timer will work normally when the system is busy, but
- * will not cause a CPU to come out of idle just to service it; instead,
- * the timer will be serviced when the CPU eventually wakes up with a
- * subsequent non-deferrable timer.
- */
-#define TBASE_DEFERRABLE_FLAG (0x1)
-
/* Functions below help us manage 'deferrable' flag */
static inline unsigned int tbase_get_deferrable(struct tvec_base *base)
{
static inline void timer_set_deferrable(struct timer_list *timer)
{
- timer->base = ((struct tvec_base *)((unsigned long)(timer->base) |
- TBASE_DEFERRABLE_FLAG));
+ timer->base = TBASE_MAKE_DEFERRED(timer->base);
}
static inline void
}
EXPORT_SYMBOL_GPL(set_timer_slack);
-
-static inline void set_running_timer(struct tvec_base *base,
- struct timer_list *timer)
-{
-#ifdef CONFIG_SMP
- base->running_timer = timer;
-#endif
-}
-
static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
{
unsigned long expires = timer->expires;
}
EXPORT_SYMBOL(del_timer);
-#ifdef CONFIG_SMP
/**
* try_to_del_timer_sync - Try to deactivate a timer
* @timer: timer do del
*
* This function tries to deactivate a timer. Upon successful (ret >= 0)
* exit the timer is not queued and the handler is not running on any CPU.
- *
- * It must not be called from interrupt contexts.
*/
int try_to_del_timer_sync(struct timer_list *timer)
{
}
EXPORT_SYMBOL(try_to_del_timer_sync);
+#ifdef CONFIG_SMP
/**
* del_timer_sync - deactivate a timer and wait for the handler to finish.
* @timer: the timer to be deactivated
*
* Synchronization rules: Callers must prevent restarting of the timer,
* otherwise this function is meaningless. It must not be called from
- * interrupt contexts. The caller must not hold locks which would prevent
+ * hardirq contexts. The caller must not hold locks which would prevent
* completion of the timer's handler. The timer's handler must not call
* add_timer_on(). Upon exit the timer is not queued and the handler is
* not running on any CPU.
int del_timer_sync(struct timer_list *timer)
{
#ifdef CONFIG_LOCKDEP
- unsigned long flags;
-
- local_irq_save(flags);
+ local_bh_disable();
lock_map_acquire(&timer->lockdep_map);
lock_map_release(&timer->lockdep_map);
- local_irq_restore(flags);
+ local_bh_enable();
#endif
-
+ /*
+ * don't use it in hardirq context, because it
+ * could lead to deadlock.
+ */
+ WARN_ON(in_irq());
for (;;) {
int ret = try_to_del_timer_sync(timer);
if (ret >= 0)
timer_stats_account_timer(timer);
- set_running_timer(base, timer);
+ base->running_timer = timer;
detach_timer(timer, 1);
spin_unlock_irq(&base->lock);
spin_lock_irq(&base->lock);
}
}
- set_running_timer(base, NULL);
+ base->running_timer = NULL;
spin_unlock_irq(&base->lock);
}
*/
unsigned long get_next_timer_interrupt(unsigned long now)
{
- struct tvec_base *base = __get_cpu_var(tvec_bases);
+ struct tvec_base *base = __this_cpu_read(tvec_bases);
unsigned long expires;
/*
*/
static void run_timer_softirq(struct softirq_action *h)
{
- struct tvec_base *base = __get_cpu_var(tvec_bases);
+ struct tvec_base *base = __this_cpu_read(tvec_bases);
hrtimer_run_pending();
endif
obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o
-obj-$(CONFIG_EVENT_TRACING) += power-traces.o
+obj-$(CONFIG_TRACEPOINTS) += power-traces.o
ifeq ($(CONFIG_TRACING),y)
obj-$(CONFIG_KGDB_KDB) += trace_kdb.o
endif
__this_cpu_inc(user_stack_count);
-
-
event = trace_buffer_lock_reserve(buffer, TRACE_USER_STACK,
sizeof(*entry), flags, pc);
if (!event)
- return;
+ goto out_drop_count;
entry = ring_buffer_event_data(event);
entry->tgid = current->tgid;
if (!filter_check_discard(call, entry, buffer, event))
ring_buffer_unlock_commit(buffer, event);
+ out_drop_count:
__this_cpu_dec(user_stack_count);
-
out:
preempt_enable();
}
static int trace_wakeup_test_thread(void *data)
{
/* Make this a RT thread, doesn't need to be too high */
- struct sched_param param = { .sched_priority = 5 };
+ static struct sched_param param = { .sched_priority = 5 };
struct completion *x = data;
sched_setscheduler(current, SCHED_FIFO, ¶m);
*/
static int watchdog(void *unused)
{
- struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
+ static struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
struct hrtimer *hrtimer = &__raw_get_cpu_var(watchdog_hrtimer);
sched_setscheduler(current, SCHED_FIFO, ¶m);
endif
lib-y := ctype.o string.o vsprintf.o cmdline.o \
- rbtree.o radix-tree.o dump_stack.o \
+ rbtree.o radix-tree.o dump_stack.o timerqueue.o\
idr.o int_sqrt.o extable.o prio_tree.o \
sha1.o irq_regs.o reciprocal_div.o argv_split.o \
proportions.o prio_heap.o ratelimit.o show_mem.o \
else if (!dp->flags)
dt->num_enabled++;
dp->flags = newflags;
- if (newflags) {
- jump_label_enable(&dp->enabled);
- } else {
- jump_label_disable(&dp->enabled);
- }
+ if (newflags)
+ dp->enabled = 1;
+ else
+ dp->enabled = 0;
if (verbose)
printk(KERN_INFO
"ddebug: changed %s:%d [%s]%s %s\n",
--- /dev/null
+/*
+ * Generic Timer-queue
+ *
+ * Manages a simple queue of timers, ordered by expiration time.
+ * Uses rbtrees for quick list adds and expiration.
+ *
+ * NOTE: All of the following functions need to be serialized
+ * to avoid races. No locking is done by this libary code.
+ *
+ * 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
+ */
+
+#include <linux/timerqueue.h>
+#include <linux/rbtree.h>
+#include <linux/module.h>
+
+/**
+ * timerqueue_add - Adds timer to timerqueue.
+ *
+ * @head: head of timerqueue
+ * @node: timer node to be added
+ *
+ * Adds the timer node to the timerqueue, sorted by the
+ * node's expires value.
+ */
+void timerqueue_add(struct timerqueue_head *head, struct timerqueue_node *node)
+{
+ struct rb_node **p = &head->head.rb_node;
+ struct rb_node *parent = NULL;
+ struct timerqueue_node *ptr;
+
+ /* Make sure we don't add nodes that are already added */
+ WARN_ON_ONCE(!RB_EMPTY_NODE(&node->node));
+
+ while (*p) {
+ parent = *p;
+ ptr = rb_entry(parent, struct timerqueue_node, node);
+ if (node->expires.tv64 < ptr->expires.tv64)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+ rb_link_node(&node->node, parent, p);
+ rb_insert_color(&node->node, &head->head);
+
+ if (!head->next || node->expires.tv64 < head->next->expires.tv64)
+ head->next = node;
+}
+EXPORT_SYMBOL_GPL(timerqueue_add);
+
+/**
+ * timerqueue_del - Removes a timer from the timerqueue.
+ *
+ * @head: head of timerqueue
+ * @node: timer node to be removed
+ *
+ * Removes the timer node from the timerqueue.
+ */
+void timerqueue_del(struct timerqueue_head *head, struct timerqueue_node *node)
+{
+ WARN_ON_ONCE(RB_EMPTY_NODE(&node->node));
+
+ /* update next pointer */
+ if (head->next == node) {
+ struct rb_node *rbn = rb_next(&node->node);
+
+ head->next = rbn ?
+ rb_entry(rbn, struct timerqueue_node, node) : NULL;
+ }
+ rb_erase(&node->node, &head->head);
+ RB_CLEAR_NODE(&node->node);
+}
+EXPORT_SYMBOL_GPL(timerqueue_del);
+
+/**
+ * timerqueue_iterate_next - Returns the timer after the provided timer
+ *
+ * @node: Pointer to a timer.
+ *
+ * Provides the timer that is after the given node. This is used, when
+ * necessary, to iterate through the list of timers in a timer list
+ * without modifying the list.
+ */
+struct timerqueue_node *timerqueue_iterate_next(struct timerqueue_node *node)
+{
+ struct rb_node *next;
+
+ if (!node)
+ return NULL;
+ next = rb_next(&node->node);
+ if (!next)
+ return NULL;
+ return container_of(next, struct timerqueue_node, node);
+}
+EXPORT_SYMBOL_GPL(timerqueue_iterate_next);
# '@parameter' - name of a parameter
# '%CONST' - name of a constant.
+## init lots of data
+
my $errors = 0;
my $warnings = 0;
my $anon_struct_union = 0;
$type_param, "\$1" );
my $blankline_list = "";
-sub usage {
- print "Usage: $0 [ -v ] [ -docbook | -html | -text | -man | -list ]\n";
- print " [ -no-doc-sections ]\n";
- print " [ -function funcname [ -function funcname ...] ]\n";
- print " [ -nofunction funcname [ -nofunction funcname ...] ]\n";
- print " c source file(s) > outputfile\n";
- print " -v : verbose output, more warnings & other info listed\n";
- exit 1;
-}
-
# read arguments
if ($#ARGV == -1) {
usage();
}
+my $kernelversion;
+my $dohighlight = "";
+
my $verbose = 0;
my $output_mode = "man";
my $no_doc_sections = 0;
'November', 'December')[(localtime)[4]] .
" " . ((localtime)[5]+1900);
-# Essentially these are globals
+# Essentially these are globals.
# They probably want to be tidied up, made more localised or something.
# CAVEAT EMPTOR! Some of the others I localised may not want to be, which
# could cause "use of undefined value" or other bugs.
}
}
+# continue execution near EOF;
+
+sub usage {
+ print "Usage: $0 [ -v ] [ -docbook | -html | -text | -man | -list ]\n";
+ print " [ -no-doc-sections ]\n";
+ print " [ -function funcname [ -function funcname ...] ]\n";
+ print " [ -nofunction funcname [ -nofunction funcname ...] ]\n";
+ print " c source file(s) > outputfile\n";
+ print " -v : verbose output, more warnings & other info listed\n";
+ exit 1;
+}
+
# get kernel version from env
sub get_kernel_version() {
my $version = 'unknown kernel version';
}
return $version;
}
-my $kernelversion = get_kernel_version();
-
-# generate a sequence of code that will splice in highlighting information
-# using the s// operator.
-my $dohighlight = "";
-foreach my $pattern (keys %highlights) {
-# print STDERR "scanning pattern:$pattern, highlight:($highlights{$pattern})\n";
- $dohighlight .= "\$contents =~ s:$pattern:$highlights{$pattern}:gs;\n";
-}
##
# dumps section contents to arrays/hashes intended for that purpose.
});
}
-sub process_file($);
-
-# Read the file that maps relative names to absolute names for
-# separate source and object directories and for shadow trees.
-if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
- my ($relname, $absname);
- while(<SOURCE_MAP>) {
- chop();
- ($relname, $absname) = (split())[0..1];
- $relname =~ s:^/+::;
- $source_map{$relname} = $absname;
- }
- close(SOURCE_MAP);
-}
-
-foreach (@ARGV) {
- chomp;
- process_file($_);
-}
-if ($verbose && $errors) {
- print STDERR "$errors errors\n";
-}
-if ($verbose && $warnings) {
- print STDERR "$warnings warnings\n";
-}
-
-exit($errors);
-
sub reset_state {
$function = "";
%constants = ();
}
}
}
+
+
+$kernelversion = get_kernel_version();
+
+# generate a sequence of code that will splice in highlighting information
+# using the s// operator.
+foreach my $pattern (keys %highlights) {
+# print STDERR "scanning pattern:$pattern, highlight:($highlights{$pattern})\n";
+ $dohighlight .= "\$contents =~ s:$pattern:$highlights{$pattern}:gs;\n";
+}
+
+# Read the file that maps relative names to absolute names for
+# separate source and object directories and for shadow trees.
+if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
+ my ($relname, $absname);
+ while(<SOURCE_MAP>) {
+ chop();
+ ($relname, $absname) = (split())[0..1];
+ $relname =~ s:^/+::;
+ $source_map{$relname} = $absname;
+ }
+ close(SOURCE_MAP);
+}
+
+foreach (@ARGV) {
+ chomp;
+ process_file($_);
+}
+if ($verbose && $errors) {
+ print STDERR "$errors errors\n";
+}
+if ($verbose && $warnings) {
+ print STDERR "$warnings warnings\n";
+}
+
+exit($errors);
projects / mv-sheeva.git / commitdiff