Chris Metcalf [Tue, 13 Aug 2013 18:42:36 +0000 (14:42 -0400)]
tile: check for correct compiler earlier in asm-offsets.c
If we wait until after including a bunch of other files, we
will have generated so much warning spew that it's hard to
notice the error about using the wrong compiler.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 12 Aug 2013 19:08:09 +0000 (15:08 -0400)]
tile: add virt_to_kpte() API and clean up and document behavior
We use virt_to_pte(NULL, va) a lot, which isn't very obvious.
I added virt_to_kpte(va) as a more obvious wrapper function,
that also validates the va as being a kernel adddress.
And, I fixed the semantics of virt_to_pte() so that we handle
the pud and pmd the same way, and we now document the fact that
we handle the final pte level differently.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 12 Aug 2013 19:00:51 +0000 (15:00 -0400)]
tile: support FRAME_POINTER
Allow enabling frame pointer support; this makes it easier to hook
into the various kernel features that claim they require it without
having to add Kconfig conditionals everywhere (a la mips, ppc, s390,
and microblaze). When enabled, it basically eliminates leaf functions
as such, and stops optimizing tail and sibling calls. It adds around
3% to the size of the kernel when enabled.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 12 Aug 2013 18:39:22 +0000 (14:39 -0400)]
tile: support reporting Tilera hypervisor statistics
Newer hypervisors have an API for reporting per-cpu statistics
information. This change allows seeing that information via
/sys/devices/system/cpu/cpuN/hv_stats file for each core.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 28 Aug 2013 23:53:17 +0000 (19:53 -0400)]
tilegx: support KGDB
Enter kernel debugger at boot with:
--hvd UART_1=1 --hvx kgdbwait --hvx kgdboc=ttyS1,115200
or at runtime with:
echo ttyS1,115200 > /sys/module/kgdboc/parameters/kgdboc
echo g > /proc/sysrq-trigger
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 12 Aug 2013 18:09:28 +0000 (14:09 -0400)]
tilegx: provide kernel support for the tilegx UART shim
The TILE-Gx chip includes an on-chip UART. This change adds support
for using the UART from within the kernel. The UART shim has more
functionality than is exposed here, but to keep the kernel code and
binary simpler, this is a subset of the full API designed to enable
a standard Linux tty serial driver only.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 3 Sep 2013 18:41:36 +0000 (14:41 -0400)]
tile: parameterize VA and PA space more cleanly
The existing code relied on the hardware definition (<arch/chip.h>)
to specify how much VA and PA space was available. It's convenient
to allow customizing this for some configurations, so provide symbols
MAX_PA_WIDTH and MAX_VA_WIDTH in <asm/page.h> that can be modified
if desired.
Additionally, move away from the MEM_XX_INTRPT nomenclature to
define the start of various regions within the VA space. In fact
the cleaner symbol is, for example, MEM_SV_START, to indicate the
start of the area used for supervisor code; the actual address of the
interrupt vectors is not as important, and can be changed if desired.
As part of this change, convert from "intrpt1" nomenclature (which
built in the old privilege-level 1 model) to a simple "intrpt".
Also strip out some tilepro-specific code supporting modifying the
PL the kernel could run at, since we don't actually support using
different PLs in tilepro, only tilegx.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 3 Sep 2013 18:45:52 +0000 (14:45 -0400)]
tile: don't assume user privilege is zero
Technically, user privilege is anything less than kernel
privilege. We modify the existing user_mode() macro to have
this semantic (and use it in a couple of places it wasn't being
used before), and add an IS_KERNEL_EX1() macro to the assembly
code as well.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 3 Sep 2013 18:13:31 +0000 (14:13 -0400)]
tile: clean up relocate_kernel_64 debug code
We remove some debug code in relocate_kernel_64.S that made raw
calls to the hv_console_putc Tilera hypervisor API, since everything
should funnel through the early_hv_write() API.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Sat, 10 Aug 2013 17:15:46 +0000 (13:15 -0400)]
tile: handle super huge pages in virt_to_pte
This tile-specific API had a minor bug, in that if a super huge (>4GB)
page mapped a particular address range, we wouldn't handle it correctly.
As part of fixing that bug, I also cleaned up some of the pud and pmd
accessors to make them more consistent.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Sat, 10 Aug 2013 16:35:02 +0000 (12:35 -0400)]
tilegx: change how we find the kernel stack
Previously, we used a special-purpose register (SPR_SYSTEM_SAVE_K_0)
to hold the CPU number and the top of the current kernel stack
by using the low bits to hold the CPU number, and using the high
bits to hold the address of the page just above where we'd want
the kernel stack to be. That way we could initialize a new SP
when first entering the kernel by just masking the SPR value and
subtracting a couple of words.
However, it's actually more useful to be able to place an arbitrary
kernel-top value in the SPR. This allows us to create a new stack
context (e.g. for virtualization) with an arbitrary top-of-stack VA.
To make this work, we now store the CPU number in the high bits,
above the highest legal VA bit (42 bits in the current tilegx
microarchitecture). The full 42 bits are thus available to store the
top of stack value. Getting the current cpu (a relatively common
operation) is still fast; it's now a shift rather than a mask.
We make this change only for tilegx, since tilepro has too few SPR
bits to do this, and we don't need this support on tilepro anyway.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Sat, 10 Aug 2013 16:22:43 +0000 (12:22 -0400)]
tile: don't call show_regs_print_info() with corrupt current
We use the validate_current() API to make sure that "current" seems
plausible before using it. With the new show_regs_print_info()
API, we want to check that current is OK before calling it, since
otherwise we will end up in a recursive panic.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 9 Aug 2013 20:53:50 +0000 (16:53 -0400)]
tile: fix some -Wsign-compare warnings
Normally the build doesn't include these warnings, but at one
point I built with -Wsign-compare, and noticed a few things that
are technically bugs. This change fixes those things.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 9 Aug 2013 20:50:36 +0000 (16:50 -0400)]
tile: group .hottext* sections properly in vmlinux.lds
With this change such sections are grouped with regular text
in the vmlinux image; this change puts them at the front,
which is where the standard Linux includes .text.hot*.
This change should fix a recently-observed bug where a bunch of
symbols were being omitted from the /proc/kallsyms output
because they fell between _etext and _sinittext.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 9 Aug 2013 20:21:43 +0000 (16:21 -0400)]
tile: fix strncpy_from_user bug
In strncpy_from_user_asm, when the destination buffer length was the
same as the actual string length, we were returning the size of the
destination buffer. But since it's a NUL terminated string, we should
return the length of the string instead.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 9 Aug 2013 20:17:03 +0000 (16:17 -0400)]
tile: remove set/clear_fixmap APIs
Nothing in the codebase was using them, and as written they took
"unsigned long" as the physical address rather than "phys_addr_t",
which is wrong on tilepro anyway. Rather than fixing stale APIs,
just remove them; if there's ever demand for them on this platform,
we can put them back.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 9 Aug 2013 20:09:41 +0000 (16:09 -0400)]
tile: do less L1 I-cache eviction
We had been doing an automatic full eviction of the L1 I$
everywhere whenever we did a kernel-space TLB flush. It turns
out this isn't necessary, since all the callers already handle
doing a flush if necessary.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 9 Aug 2013 19:42:56 +0000 (15:42 -0400)]
tile: correct r1 value during syscall tracing
The r1 value is set based on the r0 value as we return to user space.
So tracing tools won't automatically see the right value. Fix this by
generating the correct r1 value in do_syscall_trace_exit() rather
than trying to tamper with the hot path in syscall return.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 9 Aug 2013 19:41:09 +0000 (15:41 -0400)]
tile: fix panic with large IRQ number
The "available_irqs" value needs to actually reflect the IRQs
available, not just start as an all-ones mask, since we only
have 32 IRQs available even on a 64-bit platform.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Tony Lu [Fri, 9 Aug 2013 19:08:57 +0000 (15:08 -0400)]
tile: support kprobes on tilegx
This change includes support for Kprobes, Jprobes and Return Probes.
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Tony Lu <zlu@tilera.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 7 Aug 2013 20:03:08 +0000 (16:03 -0400)]
tile: provide traceability for hypervisor calls
This change adds infrastructure (CONFIG_TILE_HVGLUE_TRACE) that
provides C code wrappers for the calls the kernel makes to the Tilera
hypervisor. This allows standard kernel infrastructure like FTRACE to
be able to instrument hypervisor calls.
To allow direct calls to the true API, we export their names with a
leading underscore as well. This is important for the few contexts
where we need to make hypervisor calls without touching the stack.
As part of this change, we also switch from creating the symbols
with linker magic to creating them with assembler magic. This lets
us provide a symbol type and generally make them appear more as symbols
and less as just random values in the Elf namespace.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 7 Aug 2013 19:33:32 +0000 (15:33 -0400)]
tile: implement gettimeofday() via vDSO
This change creates the framework for vDSO calls, makes the existing
rt_sigreturn() mechanism use it, and adds a fast gettimeofday().
Now that we need to expose the vDSO address to userspace, we add
AT_SYSINFO_EHDR to the set of aux entries provided to userspace.
(You can disable any extra vDSO support by booting with vdso=0,
but the rt_sigreturn vDSO page will still be provided.)
Note that glibc has supported the tile vDSO since release 2.17.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 7 Aug 2013 18:07:03 +0000 (14:07 -0400)]
tile: support simulator notification for ET_DYN objects
The tile code notifies the simulator of new ET_EXEC objects starting
to execute so that tracing code can properly annotate the objects.
However, we didn't support ET_DYN executables like ld.so, so we
didn't properly load symbols, etc. This change enables that support;
we use a variant of the SIM_CONTROL_DLOPEN simulator notification
that newer simulators will recognize and use to set the base address
for the next SIM_CONTROL_OS_EXEC notification.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
First, don't re-enable interrupts blindly in the Linux trap handler.
We already handle page faults this way; synchronous interrupts like
ILL_TRANS will fire even when interrupts are disabled, and we don't
want to re-enable interrupts in that case.
For ILL_TRANS, we now pass the ILL_VA_PC reason into the trap handler
so we can report it properly; this is the address that caused the
illegal translation trap. We print the address as part of the
pr_alert() message now if it's coming from the kernel.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 7 Aug 2013 16:03:53 +0000 (12:03 -0400)]
tile: make register dumps more readable
It's much easier to read register dumps if you read vertically
rather than horizontally, since the register numbers line up
and lead the eye down more than to the right.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 7 Aug 2013 15:55:35 +0000 (11:55 -0400)]
tile: improve big-endian support
First, fix a bug in asm/unaligned.h; we need to just use the asm-generic
unaligned.h so we properly choose endian-correct flavors.
Second, keep the hv/hypervisor.h ABI fully "native" in the sense that
we don't have __BIG_ENDIAN__ ifdefs there. Instead, we use macros in
the head_NN.S assembly code to properly extract two 32-bit structure
members from a 64-bit register holding the structure.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 7 Aug 2013 15:36:54 +0000 (11:36 -0400)]
tile: support CONFIG_PREEMPT
This change adds support for CONFIG_PREEMPT (full kernel preemption).
In addition to the core support, this change includes a number
of places where we fix up uses of smp_processor_id() and per-cpu
variables. I also eliminate the PAGE_HOME_HERE and PAGE_HOME_UNKNOWN
values for page homing, as it turns out they weren't being used.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Wed, 7 Aug 2013 15:00:45 +0000 (11:00 -0400)]
tile: fix some issues in hugepage support
First, in huge_pte_offset(), we were erroneously checking
pgd_present(), which is always true, rather than pud_present(),
which is the thing that tells us if there is a top-level (L0) PTE.
Fixing this means we properly look up huge page entries only when
the Present bit is actually set in the PTE.
Second, use the standard pte_alloc_map() instead of the hand-rolled
pte_alloc_hugetlb() routine that basically was written to avoid
worrying about CONFIG_HIGHPTE. However, we no longer plan to support
HIGHPTE, so a separate routine was just unnecessary code duplication.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 6 Aug 2013 20:10:23 +0000 (16:10 -0400)]
tile: avoid recursive backtrace faults
This change adds support for avoiding recursive backtracer crashes;
we haven't seen this in practice other than when things are seriously
corrupt, but it may help avoid losing the root cause of a crash.
Also, don't abort kernel backtracers for invalid userspace PC's.
If we do, we lose the ability to backtrace through a userspace
call to a bad address above PAGE_OFFSET, even though that it can
be perfectly reasonable to continue the backtrace in such a case.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 6 Aug 2013 20:04:13 +0000 (16:04 -0400)]
tile: fast-path unaligned memory access for tilegx
This change enables unaligned userspace memory access via a kernel
fast path on tilegx. The kernel tracks user PC/instruction pairs
per-thread using a direct-mapped cache in userspace. The cache
maps those PC/instruction pairs to JIT'ed instruction sequences that
load or store using byte-wide load store intructions and then
synthesize 2-, 4- or 8-byte load or store results. Once an
instruction has been seen to generate an unaligned access once,
subsequent hits on that instruction typically require overhead
of only around 50 cycles if cache and TLB is hot.
We support the prctl() PR_GET_UNALIGN / PR_SET_UNALIGN sys call to
enable or disable unaligned fixups on a per-process basis.
To do this we pull some of the tilepro unaligned support out of the
single_step.c file; tilepro uses instruction disassembly for both
single-step and unaligned access support. Since tilegx actually has
hardware singlestep support, though, it's cleaner to keep the tilegx
unaligned access code in a separate file. While we're at it,
properly rename the tilepro-specific types, etc., to have tilepro
suffixes instead of generic tile suffixes.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 6 Aug 2013 18:29:59 +0000 (14:29 -0400)]
tile: support "memmap" boot parameter
This change adds support for the "memmap" boot parameter similar
to what x86 provides. The tile version supports "memmap=1G$5G",
for example, as a way to reserve a 1 GB range starting at PA 5GB.
The memory is reserved via bootmem during startup, and we create a
suitable "struct resource" marked as "Reserved" so you can see the
range reported by /proc/iomem. Up to 64 such regions can currently
be reserved on the boot command line.
We do not support the x86 options "memmap=nn@ss" (force some memory
to be available at the given address) since it's pointless to try to
have Linux use memory the Tilera hypervisor hasn't given it. We do
not support "memmap=nn#ss" to add an ACPI range for later processing,
since we don't support ACPI. We do not support "memmap=exactmap"
since we don't support reading the e820 information from the BIOS
like x86 does. I did add support for "memmap=nn" (and the synonym
"mem=nn") which cap the highest PA value at "nn"; these are both
just a synonym for the existing tile boot option "maxmem".
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 6 Aug 2013 18:11:21 +0000 (14:11 -0400)]
tile: various console improvements
This change improves and cleans up the tile console.
- We enable HVC_IRQ support on tilegx, with the addition of a new
Tilera hypervisor API for tilegx to allow a console IPI. If IPI
support is not available we fall back to the previous polling mode.
- We simplify the earlyprintk code to use CON_BOOT and eliminate some
of the other supporting earlyprintk code.
- A new tile_console_write() primitive is used to send output to
the console and is factored out of the hvc_tile driver.
This lets us support a "sim_console" boot argument to allow using
simulator hooks to send output to the "console" as a slightly
faster alternative to emulating the hardware more directly.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chris Metcalf [Mon, 5 Aug 2013 18:33:17 +0000 (14:33 -0400)]
tile PCI RC: reduce driver's vmalloc space usage
We can take advantage of the fact that bit 29 is hard-wired
to zero in register TRIO_TILE_PIO_REGION_SETUP_CFG_ADDR.
This is handy since at the moment we only allocate one 4GB
region for vmalloc, and with this change we can allocate
four or more TRIO MACs without using up all the vmalloc space.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 5 Aug 2013 17:45:28 +0000 (13:45 -0400)]
tile PCI DMA: fix bug in non-page-aligned accessors
The code incorrectly masked with PAGE_OFFSET instead of
PAGE_SIZE-1. This only matters when trying to do a
non page-aligned DMA; it was noticed during code inspection.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 5 Aug 2013 17:40:47 +0000 (13:40 -0400)]
tile PCI RC: add dma_get_required_mask()
The standard kernel function dma_get_required_mask() uses the
highest DRAM address to determine if 32-bit or 64-bit DMA addressing
is needed. This only works on architectures that have direct mapping
between the PA and the PCI address space, i.e. those that don't have
I/O TLBs or have I/O TLB but choose to use direct mapping. Neither
of these are true for tilegx. Whether to use 64-bit DMA should depend
on the PCI device's capability only, not on the amount of DRAM
installeds, so we now advertise a 64-bit DMA mask unconditionally.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 5 Aug 2013 17:32:52 +0000 (13:32 -0400)]
tile PCI RC: use proper accessor function
Using the low-level hv_dev_pread() API makes assumptions about the
layout of datastructures in the Tilera hypervisor API; it's better to
use the gxio_XXX accessor and the pcie_trio_ports_property struct.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Mon, 5 Aug 2013 17:18:02 +0000 (13:18 -0400)]
tile PCI RC: restructure TRIO initialization
The TRIO shim initialization is shared with other kernel drivers
such as the endpoint and StreamIO drivers, so reorganize the
initialization flow to ensure that the root complex driver properly
initializes TRIO state regardless of what kind of TRIO driver will
end up using the shim.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 2 Aug 2013 20:45:22 +0000 (16:45 -0400)]
tile PCI RC: support I/O space access
To enable this functionality, configure CONFIG_TILE_PCI_IO. Without
this flag, the kernel still assigns I/O address ranges to the
devices, but no TRIO resource and mapping support is provided.
We assign disjoint I/O address ranges to separate PCIe domains.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 2 Aug 2013 16:55:15 +0000 (12:55 -0400)]
tile PCI RC: support more MSI-X interrupt vectors
To support PCIe devices with higher number of MSI-X interrupt vectors,
e.g. 16 for the LSI RAID card, enhance the Gx RC stack to provide more
MSI-X vectors by using the TRIO Scatter Queues, which provide 8 more
vectors in addition to ~10 from the Map Mem regions.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 2 Aug 2013 16:24:42 +0000 (12:24 -0400)]
tile: support LSI MEGARAID SAS HBA hybrid dma_ops
The LSI MEGARAID SAS HBA suffers from the problem where it can do
64-bit DMA to streaming buffers but not to consistent buffers.
In other words, 64-bit DMA is used for disk data transfers and 32-bit
DMA must be used for control message transfers. According to LSI,
the firmware is not fully functional yet. This change implements a
kind of hybrid dma_ops to support this.
Note that on most other platforms, the 64-bit DMA addressing space is the
same as the 32-bit DMA space and they overlap the physical memory space.
No special arrangement is needed to support this kind of mixed DMA
capability. On TILE-Gx, the 64-bit DMA space is completely separate
from the 32-bit DMA space. Due to the use of the IOMMU, the 64-bit DMA
space doesn't overlap the physical memory space. On the other hand,
the 32-bit DMA space overlaps the physical memory space under 4GB.
The separate address spaces make it necessary to have separate dma_ops.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 2 Aug 2013 15:56:44 +0000 (11:56 -0400)]
tile PCI RC: handle case that PCI link is already up
If we are rebooting (e.g. via kexec) then the PCI RC link may
already be up. In that case, we don't want to do the software
fixup to force the link up, since that can degrade it to Gen1.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Fri, 2 Aug 2013 15:59:06 +0000 (11:59 -0400)]
tile PCI RC: cleanups for tilepro PCI RC
- remove unneeded <linux/bootmem.h> include in pci.c
- eliminate unused pci_controller.first_busno field
- prefer msleep to mdelay
- remove stale comment about pci_scan_bus_parented()
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Thu, 1 Aug 2013 19:52:17 +0000 (15:52 -0400)]
tile: optimize and clean up string functions
This change cleans up the string code in a number of ways:
- For memcpy(), fix bug in prefetch and increase distance to 3 lines;
optimize for unaligned data; do all loads before wh64 to make memcpy
safe for forward-overlapping calls; etc. Performance is improved.
- Use new copy_byte() function on tilegx to spread a single byte value
out into a full word using the shufflebytes instruction.
- Clean up header include ordering to be more canonical, and remove
spurious #undefs of function names.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Chris Metcalf [Tue, 23 Jul 2013 21:32:04 +0000 (17:32 -0400)]
tile: convert uses of "inv" to "finv"
The "inv" (invalidate) instruction is generally less safe than "finv"
(flush and invalidate), as it will drop dirty data from the cache.
It turns out we have almost no need for "inv" (other than for the
older 32-bit architecture in some limited cases), so convert to
"finv" where possible and delete the extra "inv" infrastructure.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Need add cmpxchg64(), or will cause compiling issue.
Need define it as cmpxchg() only for 64-bit operation, since cmpxchg()
can support 8 bytes.
The related error (with allmodconfig):
drivers/block/blockconsole.c: In function ‘bcon_advance_console_bytes’:
drivers/block/blockconsole.c:164:2: error: implicit declaration of function ‘cmpxchg64’ [-Werror=implicit-function-declaration]
Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
Pull slab update from Pekka Enberg:
"Highlights:
- Fix for boot-time problems on some architectures due to
init_lock_keys() not respecting kmalloc_caches boundaries
(Christoph Lameter)
- CONFIG_SLUB_CPU_PARTIAL requested by RT folks (Joonsoo Kim)
- Fix for excessive slab freelist draining (Wanpeng Li)
- SLUB and SLOB cleanups and fixes (various people)"
I ended up editing the branch, and this avoids two commits at the end
that were immediately reverted, and I instead just applied the oneliner
fix in between myself.
* 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
slub: Check for page NULL before doing the node_match check
mm/slab: Give s_next and s_stop slab-specific names
slob: Check for NULL pointer before calling ctor()
slub: Make cpu partial slab support configurable
slab: add kmalloc() to kernel API documentation
slab: fix init_lock_keys
slob: use DIV_ROUND_UP where possible
slub: do not put a slab to cpu partial list when cpu_partial is 0
mm/slub: Use node_nr_slabs and node_nr_objs in get_slabinfo
mm/slub: Drop unnecessary nr_partials
mm/slab: Fix /proc/slabinfo unwriteable for slab
mm/slab: Sharing s_next and s_stop between slab and slub
mm/slab: Fix drain freelist excessively
slob: Rework #ifdeffery in slab.h
mm, slab: moved kmem_cache_alloc_node comment to correct place
Now, this uses SLUB pretty much unmodified, but as it is the -rt kernel
with CONFIG_PREEMPT_RT set, spinlocks are mutexes, although they do
disable migration. But the SLUB code is relatively lockless, and the
spin_locks there are raw_spin_locks (not converted to mutexes), thus I
believe this bug can happen in mainline without -rt features. The -rt
patch is just good at triggering mainline bugs ;-)
Anyway, looking at where this crashed, it seems that the page variable
can be NULL when passed to the node_match() function (which does not
check if it is NULL). When this happens we get the above panic.
As page is only used in slab_alloc() to check if the node matches, if
it's NULL I'm assuming that we can say it doesn't and call the
__slab_alloc() code. Is this a correct assumption?
Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Pekka Enberg <penberg@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs stuff from Al Viro:
"O_TMPFILE ABI changes, Oleg's fput() series, misc cleanups, including
making simple_lookup() usable for filesystems with non-NULL s_d_op,
which allows us to get rid of quite a bit of ugliness"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
sunrpc: now we can just set ->s_d_op
cgroup: we can use simple_lookup() now
efivarfs: we can use simple_lookup() now
make simple_lookup() usable for filesystems that set ->s_d_op
configfs: don't open-code d_alloc_name()
__rpc_lookup_create_exclusive: pass string instead of qstr
rpc_create_*_dir: don't bother with qstr
llist: llist_add() can use llist_add_batch()
llist: fix/simplify llist_add() and llist_add_batch()
fput: turn "list_head delayed_fput_list" into llist_head
fs/file_table.c:fput(): add comment
Safer ABI for O_TMPFILE
Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86
Pull x86 platform driver updates from Matthew Garrett:
"Nothing overly exciting here - a couple of new drivers that don't do a
great deal, along with some miscellaneous fixes and a couple of small
feature enablement patches"
* 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86:
x86 platform drivers: fix gpio leak
toshiba_acpi: Add dependency on SERIO_I8042
asus-nb-wmi: set wapf=4 for ASUSTeK COMPUTER INC. 1015E/U
Add trivial driver to disable Intel Smart Connect
Add support driver for Intel Rapid Start Technology
hp-wmi: add supports for POST code error
asus-wmi: control wlan-led only if wapf == 4
drivers/platform/x86/intel_ips: Convert to module_pci_driver
asus-nb-wmi: ignore ALS notification key code
asus-wmi: append newline to messages
x86: asus-laptop: fix invalid point access
x86: msi-laptop: fix memleak
amilo-rfkill: Add dependency on SERIO_I8042
dell-laptop: fix error return code in dell_init()
hp-wmi: Enable hotkeys on some systems
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull second round of input updates from Dmitry Torokhov:
"An update to Elantech driver to support hardware v7, fix to the new
cyttsp4 driver to use proper addressing, ads7846 device tree support
and nspire-keypad got a small cleanup."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: nspire-keypad - replace magic offset with define
Input: elantech - fix for newer hardware versions (v7)
Input: cyttsp4 - use 16bit address for I2C/SPI communication
Input: ads7846 - add device tree bindings
Input: ads7846 - make sure we do not change platform data
Pull networking fixes from David Miller:
"Just a bunch of small fixes and tidy ups:
1) Finish the "busy_poll" renames, from Eliezer Tamir.
2) Fix RCU stalls in IFB driver, from Ding Tianhong.
3) Linearize buffers properly in tun/macvtap zerocopy code.
4) Don't crash on rmmod in vxlan, from Pravin B Shelar.
5) Spinlock used before init in alx driver, from Maarten Lankhorst.
6) A sparse warning fix in bnx2x broke TSO checksums, fix from Dmitry
Kravkov.
7) Dummy and ifb driver load failure paths can oops, fixes from Tan
Xiaojun and Ding Tianhong.
8) Correct MTU calculations in IP tunnels, from Alexander Duyck.
9) Account all TCP retransmits in SNMP stats properly, from Yuchung
Cheng.
10) atl1e and via-rhine do not handle DMA mapping failures properly,
from Neil Horman.
11) Various equal-cost multipath route fixes in ipv6 from Hannes
Frederic Sowa"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (36 commits)
ipv6: only static routes qualify for equal cost multipathing
via-rhine: fix dma mapping errors
atl1e: fix dma mapping warnings
tcp: account all retransmit failures
usb/net/r815x: fix cast to restricted __le32
usb/net/r8152: fix integer overflow in expression
net: access page->private by using page_private
net: strict_strtoul is obsolete, use kstrtoul instead
drivers/net/ieee802154: don't use devm_pinctrl_get_select_default() in probe
drivers/net/ethernet/cadence: don't use devm_pinctrl_get_select_default() in probe
drivers/net/can/c_can: don't use devm_pinctrl_get_select_default() in probe
net/usb: add relative mii functions for r815x
net/tipc: use %*phC to dump small buffers in hex form
qlcnic: Adding Maintainers.
gre: Fix MTU sizing check for gretap tunnels
pkt_sched: sch_qfq: remove forward declaration of qfq_update_agg_ts
pkt_sched: sch_qfq: improve efficiency of make_eligible
gso: Update tunnel segmentation to support Tx checksum offload
inet: fix spacing in assignment
ifb: fix oops when loading the ifb failed
...
Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull final round of SCSI updates from James Bottomley:
"This is the remaining set of SCSI patches for the merge window. It's
mostly driver updates (scsi_debug, qla2xxx, storvsc, mp3sas). There
are also several bug fixes in fcoe, libfc, and megaraid_sas. We also
have a couple of core changes to try to make device destruction more
deterministic"
* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (46 commits)
[SCSI] scsi constants: command, sense key + additional sense strings
fcoe: Reduce number of sparse warnings
fcoe: Stop fc_rport_priv structure leak
libfcoe: Fix meaningless log statement
libfc: Differentiate echange timer cancellation debug statements
libfc: Remove extra space in fc_exch_timer_cancel definition
fcoe: fix the link error status block sparse warnings
fcoe: Fix smatch warning in fcoe_fdmi_info function
libfc: Reject PLOGI from nodes with incompatible role
[SCSI] enable destruction of blocked devices which fail LUN scanning
[SCSI] Fix race between starved list and device removal
[SCSI] megaraid_sas: fix a bug for 64 bit arches
[SCSI] scsi_debug: reduce duplication between prot_verify_read and prot_verify_write
[SCSI] scsi_debug: simplify offset calculation for dif_storep
[SCSI] scsi_debug: invalidate protection info for unmapped region
[SCSI] scsi_debug: fix NULL pointer dereference with parameters dif=0 dix=1
[SCSI] scsi_debug: fix incorrectly nested kmap_atomic()
[SCSI] scsi_debug: fix invalid address passed to kunmap_atomic()
[SCSI] mpt3sas: Bump driver version to v02.100.00.00
[SCSI] mpt3sas: when async scanning is enabled then while scanning, devices are removed but their transport layer entries are not removed
...
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
- core fix for missing round up in the generic irq chip implementation
- new irq chip for MOXA SoCs
- a few fixes and cleanups in the irqchip drivers
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: Add support for MOXA ART SoCs
genirq: generic chip: Use DIV_ROUND_UP to calculate numchips
irqchip: nvic: Fix wrong num_ct argument for irq_alloc_domain_generic_chips()
irqchip: sun4i: Staticize sun4i_irq_ack()
irqchip: vt8500: Staticize local symbols
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
- watchdog fixes for full dynticks
- improved debug output for full dynticks
- remove an obsolete full dynticks check
- two ARM SoC clocksource drivers for sharing across SoCs
- tick broadcast fix for CPU hotplug
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tick: broadcast: Check broadcast mode on CPU hotplug
clocksource: arm_global_timer: Add ARM global timer support
clocksource: Add Marvell Orion SoC timer
nohz: Remove obsolete check for full dynticks CPUs to be RCU nocbs
watchdog: Boot-disable by default on full dynticks
watchdog: Rename confusing state variable
watchdog: Register / unregister watchdog kthreads on sysctl control
nohz: Warn if the machine can not perform nohz_full
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"This is our first set of fixes from arm-soc for 3.11.
- A handful of build and warning fixes from Arnd
- A collection of OMAP fixes
- defconfig updates to make the default configs more useful for real
use (and testing) out of the box on hardware
And a couple of other small fixes. Some of these have been recently
applied but it's normally how we deal with fixes, with less bake time
in -next needed"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (32 commits)
arm: multi_v7_defconfig: Tweaks for omap and sunxi
arm: multi_v7_defconfig: add i.MX options and NFS root
ARM: omap2: add select of TI_PRIV_EDMA
ARM: exynos: select PM_GENERIC_DOMAINS only when used
ARM: ixp4xx: avoid circular header dependency
ARM: OMAP: omap_common_late_init may be unused
ARM: sti: move DEBUG_STI_UART into alphabetical order
ARM: OMAP: build mach-omap code only if needed
ARM: zynq: use DT_MACHINE_START
ARM: omap5: omap5 has SCU and TWD
ARM: OMAP2+: omap2plus_defconfig: Enable appended DTB support
ARM: OMAP2+: Enable TI_EDMA in omap2plus_defconfig
ARM: OMAP2+: omap2plus_defconfig: enable DRA752 thermal support by default
ARM: OMAP2+: omap2plus_defconfig: enable TI bandgap driver
ARM: OMAP2+: devices: remove duplicated include from devices.c
ARM: OMAP3: igep0020: Set DSS pins in correct mux mode.
ARM: OMAP2+: N900: enable N900-specific drivers even if device tree is enabled
ARM: OMAP2+: Cocci spatch "ptr_ret.spatch"
ARM: OMAP2+: Remove obsolete Makefile line
ARM: OMAP5: Enable Cortex A15 errata 798181
...
Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM fixes from Russell King:
"A few fixes for ARM, mostly just one liners with the exception of the
missing section specification. We decided not to rely on .previous to
fix this but to explicitly state the section we want the code to be
in."
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7778/1: smp_twd: twd_update_frequency need be run on all online CPUs
ARM: 7782/1: Kconfig: Let ARM_ERRATA_364296 not depend on CONFIG_SMP
ARM: mm: fix boot on SA1110 Assabet
ARM: 7781/1: mmu: Add debug_ll_io_init() mappings to early mappings
ARM: 7780/1: add missing linker section markup to head-common.S
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
"MIPS updates:
- All the things that didn't make 3.10.
- Removes the Windriver PPMC platform. Nobody will miss it.
- Remove a workaround from kernel/irq/irqdomain.c which was there
exclusivly for MIPS. Patch by Grant Likely.
- More small improvments for the SEAD 3 platform
- Improvments on the BMIPS / SMP support for the BCM63xx series.
- Various cleanups of dead leftovers.
- Platform support for the Cavium Octeon-based EdgeRouter Lite.
Two large KVM patchsets didn't make it for this pull request because
their respective authors are vacationing"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (124 commits)
MIPS: Kconfig: Add missing MODULES dependency to VPE_LOADER
MIPS: BCM63xx: CLK: Add dummy clk_{set,round}_rate() functions
MIPS: SEAD3: Disable L2 cache on SEAD-3.
MIPS: BCM63xx: Enable second core SMP on BCM6328 if available
MIPS: BCM63xx: Add SMP support to prom.c
MIPS: define write{b,w,l,q}_relaxed
MIPS: Expose missing pci_io{map,unmap} declarations
MIPS: Malta: Update GCMP detection.
Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET"
MIPS: APSP: Remove <asm/kspd.h>
SSB: Kconfig: Amend SSB_EMBEDDED dependencies
MIPS: microMIPS: Fix improper definition of ISA exception bit.
MIPS: Don't try to decode microMIPS branch instructions where they cannot exist.
MIPS: Declare emulate_load_store_microMIPS as a static function.
MIPS: Fix typos and cleanup comment
MIPS: Cleanup indentation and whitespace
MIPS: BMIPS: support booting from physical CPU other than 0
MIPS: Only set cpu_has_mmips if SYS_SUPPORTS_MICROMIPS
MIPS: GIC: Fix gic_set_affinity infinite loop
MIPS: Don't save/restore OCTEON wide multiplier state on syscalls.
...
Pull watchdog updates from Wim Van Sebroeck:
- lots of devm_ conversions and cleanup
- platform_set_drvdata cleanups
- s3c2410: dev_err/dev_info + dev_pm_ops
- watchdog_core: don't try to stop device if not running fix
- wdrtas: use print_hex_dump
- xilinx cleanups
- orion_wdt fixes
- softdog cleanup
- hpwdt: check on UEFI bits
- deletion of mpcore_wdt driver
- addition of broadcom BCM2835 watchdog timer driver
- addition of MEN A21 watcdog devices
* git://www.linux-watchdog.org/linux-watchdog: (38 commits)
watchdog: hpwdt: Add check for UEFI bits
watchdog: softdog: remove replaceable ping operation
watchdog: New watchdog driver for MEN A21 watchdogs
Watchdog: fix clearing of the watchdog interrupt
Watchdog: allow orion_wdt to be built for Dove
watchdog: Add Broadcom BCM2835 watchdog timer driver
watchdog: delete mpcore_wdt driver
watchdog: xilinx: Setup the origin compatible string
watchdog: xilinx: Fix driver header
watchdog: wdrtas: don't use custom version of print_hex_dump
watchdog: core: don't try to stop device if not running
watchdog: jz4740: Pass device to clk_get
watchdog: twl4030: Remove redundant platform_set_drvdata()
watchdog: mpcore: Remove redundant platform_set_drvdata()
watchdog: da9055: use platform_{get,set}_drvdata()
watchdog: da9052: use platform_{get,set}_drvdata()
watchdog: cpwd: use platform_{get,set}_drvdata()
watchdog: s3c2410_wdt: convert s3c2410wdt to dev_pm_ops
watchdog: s3c2410_wdt: use dev_err()/dev_info() instead of pr_err()/pr_info()
watchdog: wm831x: use platform_{get,set}_drvdata()
...
Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull InfiniBand/RDMA changes from Roland Dreier:
- AF_IB (native IB addressing) for CMA from Sean Hefty
- new mlx5 driver for Mellanox Connect-IB adapters (including post
merge request fixes)
- SRP fixes from Bart Van Assche (including fix to first merge request)
- qib HW driver updates
- resurrection of ocrdma HW driver development
- uverbs conversion to create fds with O_CLOEXEC set
- other small changes and fixes
* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (66 commits)
mlx5: Return -EFAULT instead of -EPERM
IB/qib: Log all SDMA errors unconditionally
IB/qib: Fix module-level leak
mlx5_core: Adjust hca_cap.uar_page_sz to conform to Connect-IB spec
IB/srp: Let srp_abort() return FAST_IO_FAIL if TL offline
IB/uverbs: Use get_unused_fd_flags(O_CLOEXEC) instead of get_unused_fd()
mlx5_core: Fixes for sparse warnings
IB/mlx5: Make profile[] static in main.c
mlx5: Fix parameter type of health_handler_t
mlx5: Add driver for Mellanox Connect-IB adapters
IB/core: Add reserved values to enums for low-level driver use
IB/srp: Bump driver version and release date
IB/srp: Make HCA completion vector configurable
IB/srp: Maintain a single connection per I_T nexus
IB/srp: Fail I/O fast if target offline
IB/srp: Skip host settle delay
IB/srp: Avoid skipping srp_reset_host() after a transport error
IB/srp: Fix remove_one crash due to resource exhaustion
IB/qib: New transmitter tunning settings for Dell 1.1 backplane
IB/core: Fix error return code in add_port()
...
projects / karo-tx-linux.git / log