Commit Graph

90055 Commits

Author SHA1 Message Date
Linus Torvalds aecde27c4f Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull DRM fixes from Dave Airlie:
 "I was going to leave this until post -rc1 but sysfs fixes broke
  hotplug in userspace, so I had to fix it harder, otherwise a set of
  pulls from intel, radeon and vmware,

  The vmware/ttm changes are bit larger but since its early and they are
  unlikely to break anything else I put them in, it lets vmware work
  with dri3"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (36 commits)
  drm/sysfs: fix hotplug regression since lifetime changes
  drm/exynos: g2d: fix memory leak to userptr
  drm/i915: Fix gen3 self-refresh watermarks
  drm/ttm: Remove set_need_resched from the ttm fault handler
  drm/ttm: Don't move non-existing data
  drm/radeon: hook up backlight functions for CI and KV family.
  drm/i915: Replicate BIOS eDP bpp clamping hack for hsw
  drm/i915: Do not enable package C8 on unsupported hardware
  drm/i915: Hold pc8 lock around toggling pc8.gpu_idle
  drm/i915: encoder->get_config is no longer optional
  drm/i915/tv: add ->get_config callback
  drm/radeon/cik: Add macrotile mode array query
  drm/radeon/cik: Return backend map information to userspace
  drm/vmwgfx: Make vmwgfx dma buffers prime aware
  drm/vmwgfx: Make surfaces prime-aware
  drm/vmwgfx: Hook up the prime ioctls
  drm/ttm: Add a minimal prime implementation for ttm base objects
  drm/vmwgfx: Fix false lockdep warning
  drm/ttm: Allow execbuf util reserves without ticket
  drm/i915: restore the early forcewake cleanup
  ...
2013-11-22 10:56:11 -08:00
Linus Torvalds 7fa850ab4f Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM fixes from Russell King:
 "Some small fixes for this merge window, most of them quite self
  explanatory - the biggest thing here is a fix for the ARMv7 LPAE
  suspend/resume support"

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7894/1: kconfig: select GENERIC_CLOCKEVENTS if HAVE_ARM_ARCH_TIMER
  ARM: 7893/1: bitops: only emit .arch_extension mp if CONFIG_SMP
  ARM: 7892/1: Fix warning for V7M builds
  ARM: 7888/1: seccomp: not compatible with ARM OABI
  ARM: 7886/1: make OABI default to off
  ARM: 7885/1: Save/Restore 64-bit TTBR registers on LPAE suspend/resume
  ARM: 7884/1: mm: Fix ECC mem policy printk
  ARM: 7883/1: fix mov to mvn conversion in case of 64 bit phys_addr_t and BE
  ARM: 7882/1: mm: fix __phys_to_virt to work with 64 bit phys_addr_t in BE case
  ARM: 7881/1: __fixup_smp read of SCU config should do byteswap in BE case
  ARM: Fix nommu.c build warning
2013-11-22 09:56:51 -08:00
Linus Torvalds c874e6fc35 Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Gleb Natapov.

* 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: kvm_clear_guest_page(): fix empty_zero_page usage
  kvm: mmu: delay mmu audit activation
  arm/arm64: KVM: Fix hyp mappings of vmalloc regions
2013-11-22 09:56:07 -08:00
Linus Torvalds 3bab0bf045 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull third set of powerpc updates from Benjamin Herrenschmidt:
 "This is a small collection of random bug fixes and a few improvements
  of Oops output which I deemed valuable enough to include as well.

  The fixes are essentially recent build breakage and regressions, and a
  couple of older bugs such as the DTL log duplication, the EEH issue
  with PCI_COMMAND_MASTER and the problem with small contexts passed to
  get/set_context with VSX enabled"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/signals: Mark VSX not saved with small contexts
  powerpc/pseries: Fix SMP=n build of rng.c
  powerpc: Make cpu_to_chip_id() available when SMP=n
  powerpc/vio: Fix a dma_mask issue of vio
  powerpc: booke: Fix build failures
  powerpc: ppc64 address space capped at 32TB, mmap randomisation disabled
  powerpc: Only print PACATMSCRATCH in oops when TM is active
  powerpc/pseries: Duplicate dtl entries sometimes sent to userspace
  powerpc: Remove a few lines of oops output
  powerpc: Print DAR and DSISR on machine check oopses
  powerpc: Fix __get_user_pages_fast() irq handling
  powerpc/eeh: More accurate log
  powerpc/eeh: Enable PCI_COMMAND_MASTER for PCI bridges
2013-11-22 08:07:11 -08:00
Kirill A. Shutemov c283610e44 x86, mm: do not leak page->ptl for pmd page tables
There are two code paths how page with pmd page table can be freed:
pmd_free() and pmd_free_tlb().

I've missed the second one and didn't add page table destructor call
there.  It leads to leak of page->ptl for pmd page tables, if
dynamically allocated page->ptl is in use.

The patch adds the missed destructor and modifies documentation
accordingly.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Andrey Vagin <avagin@openvz.org>
Tested-by: Andrey Vagin <avagin@openvz.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-21 16:42:28 -08:00
Dave Airlie cf96967794 Merge tag 'drm-intel-fixes-2013-11-20' of git://people.freedesktop.org/~danvet/drm-intel into drm-fixes
Just a small pile of fixes for bugs and a few regressions. I'm still
trying to track down a driver load hang on my g33 (which infuriatingly
doesn't happen when loading the module manually after boot), somehow
bisecting loves to go astray on this one :( And there's a (harmless)
locking WARN in the suspend code due to one of Jesse's vlv backlight
rework patches. Otherwise nothing outstanding afaik.

* tag 'drm-intel-fixes-2013-11-20' of git://people.freedesktop.org/~danvet/drm-intel:
  drm/i915: Fix gen3 self-refresh watermarks
  drm/i915: Replicate BIOS eDP bpp clamping hack for hsw
  drm/i915: Do not enable package C8 on unsupported hardware
  drm/i915: Hold pc8 lock around toggling pc8.gpu_idle
  drm/i915: encoder->get_config is no longer optional
  drm/i915/tv: add ->get_config callback
  drm/i915: restore the early forcewake cleanup
  Partially revert "drm/i915: tune the RC6 threshold for stability"
  drm/i915: flush cursors harder
  i915: Use 120MHz LVDS SSC clock for gen5/gen6/gen7
  x86/early quirk: use gen6 stolen detection for VLV
  drm/i915/dp: set sink to power down mode on dp disable
2013-11-21 18:45:51 +10:00
Michael Neuling c13f20ac48 powerpc/signals: Mark VSX not saved with small contexts
The VSX MSR bit in the user context indicates if the context contains VSX
state.  Currently we set this when the process has touched VSX at any stage.

Unfortunately, if the user has not provided enough space to save the VSX state,
we can't save it but we currently still set the MSR VSX bit.

This patch changes this to clear the MSR VSX bit when the user doesn't provide
enough space.  This indicates that there is no valid VSX state in the user
context.

This is needed to support get/set/make/swapcontext for applications that use
VSX but only provide a small context.  For example, getcontext in glibc
provides a smaller context since the VSX registers don't need to be saved over
the glibc function call.  But since the program calling getcontext may have
used VSX, the kernel currently says the VSX state is valid when it's not.  If
the returned context is then used in setcontext (ie. a small context without
VSX but with MSR VSX set), the kernel will refuse the context.  This situation
has been reported by the glibc community.

Based on patch from Carlos O'Donell.

Tested-by: Haren Myneni <haren@linux.vnet.ibm.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:45 +11:00
Michael Ellerman 148924f7a2 powerpc/pseries: Fix SMP=n build of rng.c
In commit a489043 "Implement arch_get_random_long() based on H_RANDOM" I
broke the SMP=n build. We were getting plpar_wrappers.h via spinlock.h
which breaks when SMP=n.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:45 +11:00
Michael Ellerman 3eb906c6b6 powerpc: Make cpu_to_chip_id() available when SMP=n
Up until now we have only used cpu_to_chip_id() in the topology code,
which is only used on SMP builds. However my recent commit a4da0d5
"Implement arch_get_random_long/int() for powernv" added a usage when
SMP=n, breaking the build.

Move cpu_to_chip_id() into prom.c so it is available for SMP=n builds.

We would move the extern to prom.h, but that breaks the include in
topology.h. Instead we leave it in smp.h, but move it out of the
CONFIG_SMP #ifdef. We also need to include asm/smp.h in rng.c, because
the linux version skips asm/smp.h on UP. What a mess.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:44 +11:00
Li Zhong c610260928 powerpc/vio: Fix a dma_mask issue of vio
I encountered following issue:
[    0.283035] ibmvscsi 30000015: couldn't initialize event pool
[    5.688822] ibmvscsi: probe of 30000015 failed with error -1

which prevents the storage from being recognized, and the machine from
booting.

After some digging, it seems that it is caused by commit 4886c399da

as dma_mask pointer in viodev->dev is not set, so in
dma_set_mask_and_coherent(), dma_set_coherent_mask() is not called
because dma_set_mask(), which is dma_set_mask_pSeriesLP() returned EIO.
While before the commit, dma_set_coherent_mask() is always called.

I tried to replace dma_set_mask_and_coherent() with
dma_coerce_mask_and_coherent(), and the machine could boot again.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:43 +11:00
Aneesh Kumar K.V dc7a9bd3d0 powerpc: booke: Fix build failures
arch/powerpc/platforms/wsp/wsp.c: In function ‘wsp_probe_devices’:
arch/powerpc/platforms/wsp/wsp.c:76:3: error: implicit declaration of function ‘of_address_to_resource’ [-Werror=implicit-function-declaration]

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:42 +11:00
Anton Blanchard 5a049f1490 powerpc: ppc64 address space capped at 32TB, mmap randomisation disabled
Commit fba2369e6c (mm: use vm_unmapped_area() on powerpc architecture)
has a bug in slice_scan_available() where we compare an unsigned long
(high_slices) against a shifted int. As a result, comparisons against
the top 32 bits of high_slices (representing the top 32TB) always
returns 0 and the top of our mmap region is clamped at 32TB

This also breaks mmap randomisation since the randomised address is
always up near the top of the address space and it gets clamped down
to 32TB.

Cc: stable@vger.kernel.org # v3.10+
Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:41 +11:00
Anton Blanchard 6d888d1ab0 powerpc: Only print PACATMSCRATCH in oops when TM is active
If TM is not active there is no need to print PACATMSCRATCH
so we can save ourselves a line.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:40 +11:00
Anton Blanchard 84b073868b powerpc/pseries: Duplicate dtl entries sometimes sent to userspace
When reading from the dispatch trace log (dtl) userspace interface, I
sometimes see duplicate entries. One example:

# hexdump -C dtl.out

00000000  07 04 00 0c 00 00 48 44  00 00 00 00 00 00 00 00
00000010  00 0c a0 b4 16 83 6d 68  00 00 00 00 00 00 00 00
00000020  00 00 00 00 10 00 13 50  80 00 00 00 00 00 d0 32

00000030  07 04 00 0c 00 00 48 44  00 00 00 00 00 00 00 00
00000040  00 0c a0 b4 16 83 6d 68  00 00 00 00 00 00 00 00
00000050  00 00 00 00 10 00 13 50  80 00 00 00 00 00 d0 32

The problem is in scan_dispatch_log() where we call dtl_consumer()
but bail out before incrementing the index.

To fix this I moved dtl_consumer() after the timebase comparison.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:39 +11:00
Anton Blanchard 9db8bcfd73 powerpc: Remove a few lines of oops output
We waste quite a few lines in our oops output:

...
MSR: 8000000000009032 <SF,EE,ME,IR,DR,RI>  CR: 28044024  XER: 00000000
SOFTE: 0
CFAR: 0000000000009088
DAR: 000000000000001c, DSISR: 40000000

GPR00: c0000000000c74f0 c00000037cc1b010 c000000000d2bb30 0000000000000000
...

We can do a better job here and remove 3 lines:

MSR: 8000000000009032 <SF,EE,ME,IR,DR,RI>  CR: 28044024  XER: 00000000
CFAR: 0000000000009088 DAR: 0000000000000010, DSISR: 40000000 SOFTE: 1
GPR00: c0000000000e3d10 c00000037cc2fda0 c000000000d2c3a8 0000000000000001

Also move PACATMSCRATCH up, it doesn't really belong in the stack
trace section.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:39 +11:00
Anton Blanchard c54006491d powerpc: Print DAR and DSISR on machine check oopses
Machine check exceptions set DAR and DSISR, so print them in our
oops output.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:38 +11:00
Heiko Carstens 95f715b08f powerpc: Fix __get_user_pages_fast() irq handling
__get_user_pages_fast() may be called with interrupts disabled (see e.g.
get_futex_key() in kernel/futex.c) and therefore should use local_irq_save()
and local_irq_restore() instead of local_irq_disable()/enable().

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
CC: <stable@vger.kernel.org> [v3.12]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:37 +11:00
Gavin Shan 0b5381a618 powerpc/eeh: More accurate log
This clarifies in the log whether the error is a global PHB error
or an individual PE being frozen.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:36 +11:00
Gavin Shan bf898ec5cb powerpc/eeh: Enable PCI_COMMAND_MASTER for PCI bridges
On PHB3, we will fail to fetch IODA tables without PCI_COMMAND_MASTER
on PCI bridges. According to one experiment I had, the MSIx interrupts
didn't raise from the adapter without the bit applied to all upstream
PCI bridges including root port of the adapter. The patch forces to
have that bit enabled accordingly.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 10:33:35 +11:00
Linus Torvalds 527d151131 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc LE updates from Ben Herrenschmidt:
 "With my previous pull request I mentioned some remaining Little Endian
  patches, notably support for our new ABI, which I was sitting on
  making sure it was all finalized.

  The toolchain folks confirmed it now, the new ABI is stable and merged
  with gcc, so we are all good.  Oh and we actually missed the actual
  Kconfig switch for LE so here it is, along with a couple more bug
  fixes.

  I have more fixes but not related to LE so I'll send them as a
  separate pull request tomorrow, let's get this one out of the way.

  Note that this supports running user space binaries using the new ABI,
  but the kernel itself still needs to be built with the old one.  We'll
  bring fixes for that after -rc1.

  Here's Anton log that goes with this series:

     This patch series adds support for the new ABI, LPAR support for
     H_SET_MODE and finally adds a kconfig option and defconfig.

     ABIv2 support was recently committed to binutils and gcc, and should
     be merged into glibc soon.  There are a number of very nice
     improvements including the removal of function descriptors.  Rusty's
     kernel patches allow binaries of either ABI to work, easing the
     transition"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Wrong DWARF CFI in the kernel vdso for little-endian / ELFv2
  powerpc: Add pseries_le_defconfig
  powerpc: Add CONFIG_CPU_LITTLE_ENDIAN kernel config option.
  powerpc: Don't use ELFv2 ABI to build the kernel
  powerpc: ELF2 binaries signal handling
  powerpc: ELF2 binaries launched directly.
  powerpc: Set eflags correctly for ELF ABIv2 core dumps.
  powerpc: Add TIF_ELF2ABI flag.
  pseries: Add H_SET_MODE to change exception endianness
  powerpc/pseries: Fix endian issues in pseries EEH code
2013-11-20 15:13:47 -08:00
Will Deacon 0c403462d6 ARM: 7894/1: kconfig: select GENERIC_CLOCKEVENTS if HAVE_ARM_ARCH_TIMER
The ARM architected timer driver doesn't compile without
GENERIC_CLOCKEVENTS selected, so ensure that we select it when building
for a platform that has the timer.

Without this patch, mach-virt fails to build without something like
mach-vexpress also selected.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-11-20 23:05:53 +00:00
Will Deacon b7ec699405 ARM: 7893/1: bitops: only emit .arch_extension mp if CONFIG_SMP
Uwe reported a build failure when targetting a NOMMU platform with my
recent prefetch changes:

  arch/arm/lib/changebit.S: Assembler messages:
  arch/arm/lib/changebit.S:15: Error: architectural extension `mp' is
			not allowed for the current base architecture

This is due to use of the .arch_extension mp directive immediately prior
to an ALT_SMP(...) instruction. Whilst the ALT_SMP macro will expand to
nothing if !CONFIG_SMP, gas will still choke on the directive.

This patch fixes the issue by only emitting the sequence (including the
directive) if CONFIG_SMP=y.

Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-11-20 23:05:53 +00:00
Linus Torvalds d5bdaf4f68 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha
Pull alpha updates from Matt Turner:
 "It contains a few fixes and some work from Richard to make alpha
  emulation under QEMU much more usable"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
  alpha: Prevent a NULL ptr dereference in csum_partial_copy.
  alpha: perf: fix out-of-bounds array access triggered from raw event
  alpha: Use qemu+cserve provided high-res clock and alarm.
  alpha: Switch to GENERIC_CLOCKEVENTS
  alpha: Enable the rpcc clocksource for single processor
  alpha: Reorganize rtc handling
  alpha: Primitive support for CPU power down.
  alpha: Allow HZ to be configured
  alpha: Notice if we're being run under QEMU
  alpha: Eliminate compiler warning from memset macro
2013-11-20 15:03:45 -08:00
Linus Torvalds dc6ec87d4c Merge branch 'parisc-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
 - revert an access_ok() patch which broke 32bit userspace on 64bit
   kernels
 - avoid a gcc miscompilation in two internal pa_memcpy() functions by
   not inlining those
 - do not export the definition of SOCK_NONBLOCK via uapi header (fixes
   build of audit package)
 - depending on the fault type we now correctly report either SIGBUS or
   SIGSEGV
 - a small fix to not compare a size_t variable for < 0

* 'parisc-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: size_t is unsigned, so comparison size < 0 doesn't make sense.
  parisc: improve SIGBUS/SIGSEGV error reporting
  parisc: break out SOCK_NONBLOCK define to own asm header file
  parisc: do not inline pa_memcpy() internal functions
  Revert "parisc: implement full version of access_ok()"
2013-11-20 15:02:50 -08:00
Linus Torvalds 8a60ba0a05 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32
Pull AVR32 updates from Hans-Christian Egtvedt.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32:
  avr32: uapi: be sure of "_UAPI" prefix for all guard macros
  avr32: add kprobe_ctlblk memory struct
  avr32: fix out-of-range jump in large kernels
  avr32: setup crt for early panic()
2013-11-20 15:02:22 -08:00
Linus Torvalds b5898cd057 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs bits and pieces from Al Viro:
 "Assorted bits that got missed in the first pull request + fixes for a
  couple of coredump regressions"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fold try_to_ascend() into the sole remaining caller
  dcache.c: get rid of pointless macros
  take read_seqbegin_or_lock() and friends to seqlock.h
  consolidate simple ->d_delete() instances
  gfs2: endianness misannotations
  dump_emit(): use __kernel_write(), not vfs_write()
  dump_align(): fix the dumb braino
2013-11-20 14:25:39 -08:00
Al Viro 2a46eed54a Wrong page freed on preallocate_pmds() failure exit
Note that pmds[i] is simply uninitialized at that point...

Granted, it's very hard to hit (you need split page locks *and*
kmalloc(sizeof(spinlock_t), GFP_KERNEL) failing), but the code is
obviously bogus.

Introduced by commit 09ef493985 ("x86: add missed
pgtable_pmd_page_ctor/dtor calls for preallocated pmds")

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-20 14:22:14 -08:00
Ulrich Weigand 280270828f powerpc: Wrong DWARF CFI in the kernel vdso for little-endian / ELFv2
I've finally tracked down why my CR signal-unwind test case still
fails on little-endian.  The problem turned to be that the kernel
installs a signal trampoline in the vDSO, and provides a DWARF CFI
record for that trampoline.  This CFI describes the save location
for CR:

  rsave (70, 38*RSIZE + (RSIZE - CRSIZE))

which is correct for big-endian, but points to the wrong word on
little-endian.   This is wrong no matter which ABI.

In addition, for the ELFv2 ABI, we should not only provide a CFI
record for register 70 (cr2), but for all CR fields separately.
Strictly speaking, I guess this would mean providing two separate
vDSO images, one for ELFv1 processes and one for ELFv2 processes (or
maybe playing some tricks with conditional DWARF expressions).
However, having CFI records for the other CR fields in ELFv1 is not
actually wrong, they just will be ignored.   So it seems the simplest
fix would be just to always provide CFI for all the fields.

Signed-off-by: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:23 +11:00
Anton Blanchard f53e462e90 powerpc: Add pseries_le_defconfig
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:23 +11:00
Anton Blanchard 7c105b63bd powerpc: Add CONFIG_CPU_LITTLE_ENDIAN kernel config option.
With the little endian support merged, we can add the
CONFIG_CPU_LITTLE_ENDIAN kernel config option.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:22 +11:00
Alistair Popple b2ca8c895e powerpc: Don't use ELFv2 ABI to build the kernel
The kernel doesn't build correctly using the ELFv2 ABI.  This patch
ensures that the ELFv1 ABI is used when building a kernel with an
ELFv2 enabled compiler.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:21 +11:00
Rusty Russell d606b92aed powerpc: ELF2 binaries signal handling
For the ELFv2 ABI, the hander is the entry point, not a function descriptor.
We also need to set up r12, and fortunately the fast_exception_return
exit path restores r12 for us so nothing else is required.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:20 +11:00
Rusty Russell 94af3abf99 powerpc: ELF2 binaries launched directly.
No function descriptor, but we set r12 up and set TIF_RESTOREALL as it
normally isn't restored on return from syscall.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:19 +11:00
Rusty Russell 918d03552e powerpc: Set eflags correctly for ELF ABIv2 core dumps.
We leave it at zero (though it could be 1) for old tasks.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:18 +11:00
Rusty Russell 373c76d622 powerpc: Add TIF_ELF2ABI flag.
Little endian ppc64 is getting an exciting new ABI.  This is reflected
by the bottom two bits of e_flags in the ELF header:

	0 == legacy binaries (v1 ABI)
	1 == binaries using the old ABI (compiled with a new toolchain)
	2 == binaries using the new ABI.

We store this in a thread flag, because we need to set it in core
dumps and for signal delivery.  Our chief concern is that it doesn't
use function descriptors.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:17 +11:00
Anton Blanchard e844b1eeae pseries: Add H_SET_MODE to change exception endianness
On little endian builds call H_SET_MODE so exceptions have the
correct endianness. We need to reset the endian during kexec
so do that in the MMU hashtable clear callback.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:16 +11:00
Anton Blanchard b91da2d4ce powerpc/pseries: Fix endian issues in pseries EEH code
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:15 +11:00
Linus Torvalds 82023bb7f7 More ACPI and power management updates for 3.13-rc1
- ACPI-based device hotplug fixes for issues introduced recently and
   a fix for an older error code path bug in the ACPI PCI host bridge
   driver.
 
 - Fix for recently broken OMAP cpufreq build from Viresh Kumar.
 
 - Fix for a recent hibernation regression related to s2disk.
 
 - Fix for a locking-related regression in the ACPI EC driver from
   Puneet Kumar.
 
 - System suspend error code path fix related to runtime PM and
   runtime PM documentation update from Ulf Hansson.
 
 - cpufreq's conservative governor fix from Xiaoguang Chen.
 
 - New processor IDs for intel_idle and turbostat and removal of
   an obsolete Kconfig option from Len Brown.
 
 - New device IDs for the ACPI LPSS (Low-Power Subsystem) driver and
   ACPI-based PCI hotplug (ACPIPHP) cleanup from Mika Westerberg.
 
 - Removal of several ACPI video DMI blacklist entries that are not
   necessary any more from Aaron Lu.
 
 - Rework of the ACPI companion representation in struct device and
   code cleanup related to that change from Rafael J Wysocki,
   Lan Tianyu and Jarkko Nikula.
 
 - Fixes for assigning names to ACPI-enumerated I2C and SPI devices
   from Jarkko Nikula.
 
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Merge tag 'pm+acpi-2-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management updates from Rafael Wysocki:

 - ACPI-based device hotplug fixes for issues introduced recently and a
   fix for an older error code path bug in the ACPI PCI host bridge
   driver

 - Fix for recently broken OMAP cpufreq build from Viresh Kumar

 - Fix for a recent hibernation regression related to s2disk

 - Fix for a locking-related regression in the ACPI EC driver from
   Puneet Kumar

 - System suspend error code path fix related to runtime PM and runtime
   PM documentation update from Ulf Hansson

 - cpufreq's conservative governor fix from Xiaoguang Chen

 - New processor IDs for intel_idle and turbostat and removal of an
   obsolete Kconfig option from Len Brown

 - New device IDs for the ACPI LPSS (Low-Power Subsystem) driver and
   ACPI-based PCI hotplug (ACPIPHP) cleanup from Mika Westerberg

 - Removal of several ACPI video DMI blacklist entries that are not
   necessary any more from Aaron Lu

 - Rework of the ACPI companion representation in struct device and code
   cleanup related to that change from Rafael J Wysocki, Lan Tianyu and
   Jarkko Nikula

 - Fixes for assigning names to ACPI-enumerated I2C and SPI devices from
   Jarkko Nikula

* tag 'pm+acpi-2-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (24 commits)
  PCI / hotplug / ACPI: Drop unused acpiphp_debug declaration
  ACPI / scan: Set flags.match_driver in acpi_bus_scan_fixed()
  ACPI / PCI root: Clear driver_data before failing enumeration
  ACPI / hotplug: Fix PCI host bridge hot removal
  ACPI / hotplug: Fix acpi_bus_get_device() return value check
  cpufreq: governor: Remove fossil comment in the cpufreq_governor_dbs()
  ACPI / video: clean up DMI table for initial black screen problem
  ACPI / EC: Ensure lock is acquired before accessing ec struct members
  PM / Hibernate: Do not crash kernel in free_basic_memory_bitmaps()
  ACPI / AC: Remove struct acpi_device pointer from struct acpi_ac
  spi: Use stable dev_name for ACPI enumerated SPI slaves
  i2c: Use stable dev_name for ACPI enumerated I2C slaves
  ACPI: Provide acpi_dev_name accessor for struct acpi_device device name
  ACPI / bind: Use (put|get)_device() on ACPI device objects too
  ACPI: Eliminate the DEVICE_ACPI_HANDLE() macro
  ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node
  cpufreq: OMAP: Fix compilation error 'r & ret undeclared'
  PM / Runtime: Fix error path for prepare
  PM / Runtime: Update documentation around probe|remove|suspend
  cpufreq: conservative: set requested_freq to policy max when it is over policy max
  ...
2013-11-20 13:25:04 -08:00
Linus Torvalds e6d69a60b7 Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine changes from Vinod Koul:
 "This brings for slave dmaengine:

   - Change dma notification flag to DMA_COMPLETE from DMA_SUCCESS as
     dmaengine can only transfer and not verify validaty of dma
     transfers

   - Bunch of fixes across drivers:

      - cppi41 driver fixes from Daniel

      - 8 channel freescale dma engine support and updated bindings from
        Hongbo

      - msx-dma fixes and cleanup by Markus

   - DMAengine updates from Dan:

      - Bartlomiej and Dan finalized a rework of the dma address unmap
        implementation.

      - In the course of testing 1/ a collection of enhancements to
        dmatest fell out.  Notably basic performance statistics, and
        fixed / enhanced test control through new module parameters
        'run', 'wait', 'noverify', and 'verbose'.  Thanks to Andriy and
        Linus [Walleij] for their review.

      - Testing the raid related corner cases of 1/ triggered bugs in
        the recently added 16-source operation support in the ioatdma
        driver.

      - Some minor fixes / cleanups to mv_xor and ioatdma"

* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (99 commits)
  dma: mv_xor: Fix mis-usage of mmio 'base' and 'high_base' registers
  dma: mv_xor: Remove unneeded NULL address check
  ioat: fix ioat3_irq_reinit
  ioat: kill msix_single_vector support
  raid6test: add new corner case for ioatdma driver
  ioatdma: clean up sed pool kmem_cache
  ioatdma: fix selection of 16 vs 8 source path
  ioatdma: fix sed pool selection
  ioatdma: Fix bug in selftest after removal of DMA_MEMSET.
  dmatest: verbose mode
  dmatest: convert to dmaengine_unmap_data
  dmatest: add a 'wait' parameter
  dmatest: add basic performance metrics
  dmatest: add support for skipping verification and random data setup
  dmatest: use pseudo random numbers
  dmatest: support xor-only, or pq-only channels in tests
  dmatest: restore ability to start test at module load and init
  dmatest: cleanup redundant "dmatest: " prefixes
  dmatest: replace stored results mechanism, with uniform messages
  Revert "dmatest: append verify result to results"
  ...
2013-11-20 13:20:24 -08:00
Sasha Levin 521ee0cfb8 kvm: mmu: delay mmu audit activation
We should not be using jump labels before they were initialized. Push back
the callback to until after jump label initialization.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-11-20 11:12:56 +02:00
Chen Gang e7f2c8c1f0 avr32: uapi: be sure of "_UAPI" prefix for all guard macros
For all uapi headers, need use "_UAPI" prefix for its guard macro
(which will be stripped by "scripts/headers_installer.sh").

Also remove redundant files (bitsperlong.h, errno.h, fcntl.h, ioctl.h,
ioctls.h, ipcbuf.h, kvm_para.h, mman.h, poll.h, resource.h, siginfo.h,
statfs.h, and unistd.h) which are already in Kbuild.

Also be sure that all "#endif" only have one empty line above, and each
file has guard macro.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Hans-Christian Egtvedt <hegtvedt@cisco.com>
2013-11-20 09:53:22 +01:00
Eirik Aanonsen dbc0d691a4 avr32: add kprobe_ctlblk memory struct
This re-enables kprobes on AVR32 architecture.

Signed-off-by: Eirik Aanonsen <eaa@wprmedical.com>
Signed-off-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
2013-11-20 09:53:22 +01:00
Andreas Bießmann d617b338bb avr32: fix out-of-range jump in large kernels
This patch fixes following error (for big kernels):

---8<---
arch/avr32/boot/u-boot/head.o: In function `no_tag_table':
(.init.text+0x44): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o
arch/avr32/kernel/built-in.o: In function `bad_return':
(.ex.text+0x236): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o
--->8---

It comes up when the kernel increases and 'panic()' is too far away to fit in
the +/- 2MiB range. Which in turn issues from the 21-bit displacement in
'br{cond4}' mnemonic which is one of the two ways to do jumps (rjmp has just
10-bit displacement and therefore a way smaller range). This fact was stated
before in 8d29b7b9f8.
One solution to solve this is to add a local storage for the symbol address
and just load the $pc with that value.

Signed-off-by: Andreas Bießmann <andreas@biessmann.de>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: stable@vger.kernel.org
2013-11-20 09:53:21 +01:00
Andreas Bießmann 7a2a74f4b8 avr32: setup crt for early panic()
Before the CRT was (fully) set up in kernel_entry (bss cleared before in
_start, but also not before jump to panic() in no_tag_table case).

This patch fixes this up to have a fully working CRT when branching to panic()
in no_tag_table.

Signed-off-by: Andreas Bießmann <andreas@biessmann.de>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: stable@vger.kernel.org
2013-11-20 09:53:21 +01:00
Linus Torvalds 4457e6f6c9 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc fixes from David Miller:
 "Two merge window fallout build fixes"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: merge fix
  sparc64: fix build regession
2013-11-19 15:50:03 -08:00
Helge Deller 964f413323 parisc: size_t is unsigned, so comparison size < 0 doesn't make sense.
Signed-off-by: Helge Deller <deller@gmx.de>
CC: Mikulas Patocka <mpatocka@redhat.com>
2013-11-20 00:09:42 +01:00
Helge Deller 49d1cb2bca parisc: improve SIGBUS/SIGSEGV error reporting
This patch fixes most of the Linux Test Project testcases, e.g. fstat05.

Signed-off-by: Helge Deller <deller@gmx.de>
2013-11-19 23:36:18 +01:00
Helge Deller 38c7937379 parisc: break out SOCK_NONBLOCK define to own asm header file
Break SOCK_NONBLOCK out to its own asm-file as other arches do. This
fixes build errors with auditd and probably other packages.

Signed-off-by: Helge Deller <deller@gmx.de>
2013-11-19 23:36:17 +01:00
Helge Deller 9af63aedb8 parisc: do not inline pa_memcpy() internal functions
gcc (4.8.x) creates wrong code when the pa_memcpy() functions are
inlined.  Especially in 32bit builds it calculates wrong return values
if we encounter a fault during execution of the memcpy.

Signed-off-by: Helge Deller <deller@gmx.de>
2013-11-19 23:36:16 +01:00
Helge Deller a0ffa8f06f Revert "parisc: implement full version of access_ok()"
This reverts commit 63379c1353.

It broke userspace and adding more checking is not needed.
Even checking if a syscall would access memory in page zero doesn't
makes sense since it may lead to some syscalls returning -EFAULT
where we would return other error codes on other platforms.
In summary, just drop this change and return to always return 1.

Signed-off-by: Helge Deller <deller@gmx.de>
2013-11-19 23:31:35 +01:00