Commit Graph

120377 Commits

Author SHA1 Message Date
Tero Kristo d41676dddd ARM: dts: am43xx: fix edma memcpy channel allocation
EDMA was allocating DMA channels 32 and 33 for memcpy usage, out of which
channel 33 is actually used by DES crypto engine. This bad allocation of
the channel causes a crash in the DES crypto engine, as the channel
gets configured for memcpy usage instead of hardware <-> memory DMA.

Fixed by allocating DMA channels 58 and 59 for memcpy usage (I2C0 RX/TX),
which are not used by anybody.

Fixes: cce1ee0001 ("ARM: DTS: am437x: Use the new DT bindings for
the eDMA3")
Cc: stable@vger.kernel.org # v4.4+
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Suggested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2016-03-30 14:14:28 -07:00
Lokesh Vutla cfe1580a64 ARM: dts: AM43x-epos: Fix clk parent for synctimer
commit 55ee7017ee ("arm: omap2: board-generic: use omap4_local_timer_init
for AM437x") makes synctimer32k as the clocksource on AM43xx. By default
the synctimer32k is clocked by 32K RTC OSC on AM43xx. But this 32K RTC OSC
is not available on epos boards which makes it fail to boot.

Synctimer32k can also be clocked by a peripheral PLL, so making this as
clock parent for synctimer3k on epos boards.

Fixes: 55ee7017ee ("arm: omap2: board-generic: use omap4_local_timer_init for AM437x")
Cc: stable@vger.kernel.org # v4.4+
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2016-03-30 14:14:20 -07:00
Nishanth Menon 456e8d5348 ARM: OMAP2: Fix up interconnect barrier initialization for DRA7
The following commits:
commit 3fa609755c ("ARM: omap2: restore OMAP4 barrier behaviour")
commit f746929ffd ("Revert "ARM: OMAP4: remove dead kconfig option OMAP4_ERRATA_I688"")
and
commit ea827ad5ff ("ARM: DRA7: Provide proper IO map table")
came in around the same time, unfortunately this seem to have missed
initializing the barrier for DRA7 platforms - omap5_map_io was reused
for dra7 till it was split out by the last patch. barrier_init
needs to be hence carried forward as it is valid for DRA7 family of
processors as they are for OMAP5.

Fixes: ea827ad5ff ("ARM: DRA7: Provide proper IO map table")
Cc: stable@vger.kernel.org # v4.1+
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2016-03-30 14:14:20 -07:00
Tony Lindgren 1809de7e7d ARM: OMAP2+: first hwmod fix for v4.6-rc
Fix a longstanding bug in the hwmod code that could cause
 hardware SYSCONFIG register values to not match the kernel's
 idea of what they should be, and that could result in lower
 performance during IP block idle entry.
 
 Basic build, boot, and PM test logs are available here:
 
 http://www.pwsan.com/omap/testlogs/omap-hwmod-fixes-a-for-v4.6-rc/20160326231727/
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Merge tag 'for-v4.6-rc/omap-fixes-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v4.6/fixes

ARM: OMAP2+: first hwmod fix for v4.6-rc

Fix a longstanding bug in the hwmod code that could cause
hardware SYSCONFIG register values to not match the kernel's
idea of what they should be, and that could result in lower
performance during IP block idle entry.

Basic build, boot, and PM test logs are available here:

http://www.pwsan.com/omap/testlogs/omap-hwmod-fixes-a-for-v4.6-rc/20160326231727/
2016-03-30 10:36:06 -07:00
Lokesh Vutla 3ca4a23810 ARM: OMAP2+: hwmod: Fix updating of sysconfig register
Commit 127500ccb7 ("ARM: OMAP2+: Only write the sysconfig on idle
when necessary") talks about verification of sysconfig cache value before
updating it, only during idle path. But the patch is adding the
verification in the enable path. So, adding the check in a proper place
as per the commit description.

Not keeping this check during enable path as there is a chance of losing
context and it is safe to do on idle as the context of the register will
never be lost while the device is active.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Cc: Jon Hunter <jonathanh@nvidia.com>
Cc: <stable@vger.kernel.org> # 3.12+
Fixes: commit 127500ccb7 "ARM: OMAP2+: Only write the sysconfig on idle when necessary"
[paul@pwsan.com: appears to have been caused by my own mismerge of the
 originally posted patch]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2016-03-26 23:08:55 -06:00
Linus Torvalds 606c61a057 Merge branch 'akpm' (patches from Andrew)
Merge fourth patch-bomb from Andrew Morton:
 "A lot more stuff than expected, sorry.  A bunch of ocfs2 reviewing was
  finished off.

   - mhocko's oom-reaper out-of-memory-handler changes

   - ocfs2 fixes and features

   - KASAN feature work

   - various fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (42 commits)
  thp: fix typo in khugepaged_scan_pmd()
  MAINTAINERS: fill entries for KASAN
  mm/filemap: generic_file_read_iter(): check for zero reads unconditionally
  kasan: test fix: warn if the UAF could not be detected in kmalloc_uaf2
  mm, kasan: stackdepot implementation. Enable stackdepot for SLAB
  arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
  mm, kasan: add GFP flags to KASAN API
  mm, kasan: SLAB support
  kasan: modify kmalloc_large_oob_right(), add kmalloc_pagealloc_oob_right()
  include/linux/oom.h: remove undefined oom_kills_count()/note_oom_kill()
  mm/page_alloc: prevent merging between isolated and other pageblocks
  drivers/memstick/host/r592.c: avoid gcc-6 warning
  ocfs2: extend enough credits for freeing one truncate record while replaying truncate records
  ocfs2: extend transaction for ocfs2_remove_rightmost_path() and ocfs2_update_edge_lengths() before to avoid inconsistency between inode and et
  ocfs2/dlm: move lock to the tail of grant queue while doing in-place convert
  ocfs2: solve a problem of crossing the boundary in updating backups
  ocfs2: fix occurring deadlock by changing ocfs2_wq from global to local
  ocfs2/dlm: fix BUG in dlm_move_lockres_to_recovery_list
  ocfs2/dlm: fix race between convert and recovery
  ocfs2: fix a deadlock issue in ocfs2_dio_end_io_write()
  ...
2016-03-25 16:59:11 -07:00
Alexander Potapenko cd11016e5f mm, kasan: stackdepot implementation. Enable stackdepot for SLAB
Implement the stack depot and provide CONFIG_STACKDEPOT.  Stack depot
will allow KASAN store allocation/deallocation stack traces for memory
chunks.  The stack traces are stored in a hash table and referenced by
handles which reside in the kasan_alloc_meta and kasan_free_meta
structures in the allocated memory chunks.

IRQ stack traces are cut below the IRQ entry point to avoid unnecessary
duplication.

Right now stackdepot support is only enabled in SLAB allocator.  Once
KASAN features in SLAB are on par with those in SLUB we can switch SLUB
to stackdepot as well, thus removing the dependency on SLUB stack
bookkeeping, which wastes a lot of memory.

This patch is based on the "mm: kasan: stack depots" patch originally
prepared by Dmitry Chernenkov.

Joonsoo has said that he plans to reuse the stackdepot code for the
mm/page_owner.c debugging facility.

[akpm@linux-foundation.org: s/depot_stack_handle/depot_stack_handle_t]
[aryabinin@virtuozzo.com: comment style fixes]
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-25 16:37:42 -07:00
Alexander Potapenko be7635e728 arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.

Move the definition of __irq_entry to <linux/interrupt.h> so that the
users don't need to pull in <linux/ftrace.h>.  Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.

Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-25 16:37:42 -07:00
Tony Luck 2d5ae5c2c7 [IA64] Enable preadv2 and pwritev2 syscalls for ia64
New system calls added in:
      f17d8b3545
      vfs: vfs: Define new syscalls preadv2,pwritev2

Signed-off-by: Tony Luck <tony.luck@intel.com>
2016-03-25 14:37:32 -07:00
Linus Torvalds 11caf57f6a asm-generic changes for 4.6
There are only three patches this time, most other changes to
 files in include/asm-generic tend to go through the tree of whoever
 depends on the change.
 
 Two patches are cleanups for stuff that is no longer needed,
 the main change is to adapt the generic version of BUG_ON()
 for CONFIG_BUG=n to make it behave consistently with BUG().
 
 This avoids undefined behavior along with a number of warnings
 about that undefined behavior in randconfig builds when
 we keep going on after hitting a BUG_ON().
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Merge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
 "There are only three patches this time, most other changes to files in
  include/asm-generic tend to go through the tree of whoever depends on
  the change.

  Two patches are cleanups for stuff that is no longer needed, the main
  change is to adapt the generic version of BUG_ON() for CONFIG_BUG=n to
  make it behave consistently with BUG().

  This avoids undefined behavior along with a number of warnings about
  that undefined behavior in randconfig builds when we keep going on
  after hitting a BUG_ON()"

* tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: remove old nonatomic-io wrapper files
  asm-generic: default BUG_ON(x) to if(x)BUG()
  asm-generic: page.h: Remove useless get_user_page and free_user_page
2016-03-24 23:13:48 -07:00
Linus Torvalds 8f40842e42 MTD updates for v4.6
NAND:
  * Add sunxi_nand randomizer support
  * begin refactoring NAND ecclayout structs
  * fix pxa3xx_nand dmaengine usage
  * brcmnand: fix support for v7.1 controller
  * add Qualcomm NAND controller driver
 
 SPI NOR:
  * add new ls1021a, ls2080a support to Freescale QuadSPI
  * add new flash ID entries
  * support bottom-block protection for Winbond flash
  * support Status Register Write Protect
  * remove broken QPI support for Micron SPI flash
 
 JFFS2:
  * improve post-mount CRC scan efficiency
 
 General:
  * refactor bcm63xxpart parser, to later extend for NAND
  * add writebuf size parameter to mtdram
 
 Other minor code quality improvements
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Merge tag 'for-linus-20160324' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "NAND:
   - Add sunxi_nand randomizer support
   - begin refactoring NAND ecclayout structs
   - fix pxa3xx_nand dmaengine usage
   - brcmnand: fix support for v7.1 controller
   - add Qualcomm NAND controller driver

  SPI NOR:
   - add new ls1021a, ls2080a support to Freescale QuadSPI
   - add new flash ID entries
   - support bottom-block protection for Winbond flash
   - support Status Register Write Protect
   - remove broken QPI support for Micron SPI flash

  JFFS2:
   - improve post-mount CRC scan efficiency

  General:
   - refactor bcm63xxpart parser, to later extend for NAND
   - add writebuf size parameter to mtdram

  Other minor code quality improvements"

* tag 'for-linus-20160324' of git://git.infradead.org/linux-mtd: (72 commits)
  mtd: nand: remove kerneldoc for removed function parameter
  mtd: nand: Qualcomm NAND controller driver
  dt/bindings: qcom_nandc: Add DT bindings
  mtd: nand: don't select chip in nand_chip's block_bad op
  mtd: spi-nor: support lock/unlock for a few Winbond chips
  mtd: spi-nor: add TB (Top/Bottom) protect support
  mtd: spi-nor: add SPI_NOR_HAS_LOCK flag
  mtd: spi-nor: use BIT() for flash_info flags
  mtd: spi-nor: disallow further writes to SR if WP# is low
  mtd: spi-nor: make lock/unlock bounds checks more obvious and robust
  mtd: spi-nor: silently drop lock/unlock for already locked/unlocked region
  mtd: spi-nor: wait for SR_WIP to clear on initial unlock
  mtd: nand: simplify nand_bch_init() usage
  mtd: mtdswap: remove useless if (!mtd->ecclayout) test
  mtd: create an mtd_oobavail() helper and make use of it
  mtd: kill the ecclayout->oobavail field
  mtd: nand: check status before reporting timeout
  mtd: bcm63xxpart: give width specifier an 'int', not 'size_t'
  mtd: mtdram: Add parameter for setting writebuf size
  mtd: nand: pxa3xx_nand: kill unused field 'drcmr_cmd'
  ...
2016-03-24 19:57:15 -07:00
Linus Torvalds 976fb3f7b9 Merge branch 'parisc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller:
 "This patchset adds stack usage debug info for parisc and metag (on
  both the stack grows upwards), switches to the new generic realative
  extable search and sort routines, drops the long time ago removed
  syscalls alloc_hugepages and free_hugepages and wires up the new
  preadv2 and pwritev2 syscalls"

* 'parisc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Wire up preadv2 and pwritev2 syscalls
  parisc: Use generic extable search and sort routines
  parisc: Panic immediately when panic_on_oops
  parisc,metag: Implement CONFIG_DEBUG_STACK_USAGE option
  parisc: Drop alloc_hugepages and free_hugepages syscalls
2016-03-24 19:16:20 -07:00
Linus Torvalds 9d854607f9 2nd set of arm64 updates for 4.6:
- KASLR bug fixes: use callee-saved register, boot-time I-cache
   maintenance
 - inv_entry asm macro fix (EL0 check typo)
 - pr_notice("Virtual kernel memory layout...") splitting
 - Clean-ups: use p?d_set_huge consistently, allow preemption around
   copy_to_user_page, remove unused __local_flush_icache_all()
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull second set of arm64 updates from Catalin Marinas:

 - KASLR bug fixes: use callee-saved register, boot-time I-cache
   maintenance

 - inv_entry asm macro fix (EL0 check typo)

 - pr_notice("Virtual kernel memory layout...") splitting

 - Clean-ups: use p?d_set_huge consistently, allow preemption around
   copy_to_user_page, remove unused __local_flush_icache_all()

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mm: allow preemption in copy_to_user_page
  arm64: consistently use p?d_set_huge
  arm64: kaslr: use callee saved register to preserve SCTLR across C call
  arm64: Split pr_notice("Virtual kernel memory layout...") into multiple pr_cont()
  arm64: drop unused __local_flush_icache_all()
  arm64: fix KASLR boot-time I-cache maintenance
  arm64/kernel: fix incorrect EL0 check in inv_entry macro
2016-03-24 19:13:59 -07:00
Linus Torvalds 8a20a04bda ARM: DT changes, part 2
Here are some final updates for ARM SoC specific dts files:
 
 * The i.MX changes were sent relatively late, and had a dependency
   on the clk tree, so I delayed that a bit. Support for the new
   i.MX6qp SoC and a couple of new boards is added in this branch.
 
 * Uniphier renames a few files to match the final product names
   that were decided by the company, kudos to the kernel developer(s)
   for getting support upstream before the product release.
   Also two boards are added. The patches were posted early enough
   and nice overall, but we forgot to apply them and decided to
   give it some more time in linux-next
 
 * at91 has two small bug fixes.
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Merge tag 'armsoc-dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull more ARM DT changes from Arnd Bergmann:
 "Here are some final updates for ARM SoC specific dts files:

   - The i.MX changes were sent relatively late, and had a dependency on
     the clk tree, so I delayed that a bit.  Support for the new i.MX6qp
     SoC and a couple of new boards is added in this branch.

   - Uniphier renames a few files to match the final product names that
     were decided by the company, kudos to the kernel developer(s) for
     getting support upstream before the product release.  Also two
     boards are added.  The patches were posted early enough and nice
     overall, but we forgot to apply them and decided to give it some
     more time in linux-next

   - at91 has two small bug fixes"

* tag 'armsoc-dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
  ARM: dts: at91: sama5d4 Xplained: don't disable hsmci regulator
  ARM: dts: at91: sama5d3 Xplained: don't disable hsmci regulator
  ARM: dts: uniphier: add pinmux node for I2C ch4
  ARM: dts: uniphier: add @{address} to EEPROM node
  ARM: dts: uniphier: add PH1-Pro4 Sanji board support
  ARM: dts: uniphier: add PH1-Pro4 Ace board support
  ARM: dts: uniphier: enable I2C channel 2 of ProXstream2 Gentil board
  ARM: dts: uniphier: add EEPROM node for ProXstream2 Gentil board
  ARM: dts: uniphier: add reference clock nodes
  ARM: dts: uniphier: rework UniPhier System Bus nodes
  ARM: dts: uniphier: factor out ranges property of support card
  arm64: dts: uniphier: rename PH1-LD10 to PH1-LD20
  ARM: dts: imx53-qsb: Fix gpio button polarity
  ARM: dts: vfxxx: Add DAC node for Vybrid SoC
  ARM: dts: imx6q: add missing links between ipu2 and mipi dsi
  ARM: dts: imx: Add support for Advantech/GE B850v3
  ARM: dts: imx: Add support for Advantech/GE B650v3
  ARM: dts: imx: Add support for Advantech/GE B450v3
  ARM: dts: imx: Add support for Advantech/GE Bx50v3
  ARM: dts: imx: Add Advantech BA-16 Qseven module
  ...
2016-03-24 19:01:38 -07:00
Linus Torvalds 732b84eece various h8300 fix.
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Merge tag 'for-4.6' of git://git.osdn.jp/gitroot/uclinux-h8/linux

Pull h8300 updates from Yoshinori Sato:
 "Various h8300 fixes"

* tag 'for-4.6' of git://git.osdn.jp/gitroot/uclinux-h8/linux:
  h8300: switch EARLYCON
  h8300: dts: Rename the serial port clock to fck
2016-03-24 18:56:51 -07:00
Linus Torvalds e46b4e2b46 Nothing major this round. Mostly small clean ups and fixes.
Some visible changes:
 
  A new flag was added to distinguish traces done in NMI context.
 
  Preempt tracer now shows functions where preemption is disabled but
  interrupts are still enabled.
 
 Other notes:
 
  Updates were done to function tracing to allow better performance
  with perf.
 
  Infrastructure code has been added to allow for a new histogram
  feature for recording live trace event histograms that can be
  configured by simple user commands. The feature itself was just
  finished, but needs a round in linux-next before being pulled.
  This only includes some infrastructure changes that will be needed.
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Merge tag 'trace-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "Nothing major this round.  Mostly small clean ups and fixes.

  Some visible changes:

   - A new flag was added to distinguish traces done in NMI context.

   - Preempt tracer now shows functions where preemption is disabled but
     interrupts are still enabled.

  Other notes:

   - Updates were done to function tracing to allow better performance
     with perf.

   - Infrastructure code has been added to allow for a new histogram
     feature for recording live trace event histograms that can be
     configured by simple user commands.  The feature itself was just
     finished, but needs a round in linux-next before being pulled.

     This only includes some infrastructure changes that will be needed"

* tag 'trace-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (22 commits)
  tracing: Record and show NMI state
  tracing: Fix trace_printk() to print when not using bprintk()
  tracing: Remove redundant reset per-CPU buff in irqsoff tracer
  x86: ftrace: Fix the misleading comment for arch/x86/kernel/ftrace.c
  tracing: Fix crash from reading trace_pipe with sendfile
  tracing: Have preempt(irqs)off trace preempt disabled functions
  tracing: Fix return while holding a lock in register_tracer()
  ftrace: Use kasprintf() in ftrace_profile_tracefs()
  ftrace: Update dynamic ftrace calls only if necessary
  ftrace: Make ftrace_hash_rec_enable return update bool
  tracing: Fix typoes in code comment and printk in trace_nop.c
  tracing, writeback: Replace cgroup path to cgroup ino
  tracing: Use flags instead of bool in trigger structure
  tracing: Add an unreg_all() callback to trigger commands
  tracing: Add needs_rec flag to event triggers
  tracing: Add a per-event-trigger 'paused' field
  tracing: Add get_syscall_name()
  tracing: Add event record param to trigger_ops.func()
  tracing: Make event trigger functions available
  tracing: Make ftrace_event_field checking functions available
  ...
2016-03-24 10:52:25 -07:00
Linus Torvalds 0f0fbec9c3 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
 "A small set of fixes for the usual ARM/SOC irqchip drivers

   - A set of fixes for mbigen to handle multiple devices in a hardware
     module proper

   - A cleanup for the mbigen config option which was pointlessly user
     configurable.

   - A cleanup for tegra replacing open coded functionality by the
     proper core function

  The config cleanup touches arch/arm64/Kconfig.platforms to select the
  irq chip for the related platform"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mbigen: Make CONFIG_HISILICON_IRQ_MBIGEN a hidden option
  ARM64: Kconfig: Select mbigen interrupt controller on Hisilicon platform
  irqchip/mbigen: Handle multiple device nodes in a mbigen module
  irqchip/mbigen: Adjust DT bindings to handle multiple devices in a module
  irqchip/tegra: Switch to use irq_domain_free_irqs_common
2016-03-24 10:29:44 -07:00
Linus Torvalds 3fa2fe2ce0 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "This tree contains various perf fixes on the kernel side, plus three
  hw/event-enablement late additions:

   - Intel Memory Bandwidth Monitoring events and handling
   - the AMD Accumulated Power Mechanism reporting facility
   - more IOMMU events

  ... and a final round of perf tooling updates/fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
  perf llvm: Use strerror_r instead of the thread unsafe strerror one
  perf llvm: Use realpath to canonicalize paths
  perf tools: Unexport some methods unused outside strbuf.c
  perf probe: No need to use formatting strbuf method
  perf help: Use asprintf instead of adhoc equivalents
  perf tools: Remove unused perf_pathdup, xstrdup functions
  perf tools: Do not include stringify.h from the kernel sources
  tools include: Copy linux/stringify.h from the kernel
  tools lib traceevent: Remove redundant CPU output
  perf tools: Remove needless 'extern' from function prototypes
  perf tools: Simplify die() mechanism
  perf tools: Remove unused DIE_IF macro
  perf script: Remove lots of unused arguments
  perf thread: Rename perf_event__preprocess_sample_addr to thread__resolve
  perf machine: Rename perf_event__preprocess_sample to machine__resolve
  perf tools: Add cpumode to struct perf_sample
  perf tests: Forward the perf_sample in the dwarf unwind test
  perf tools: Remove misplaced __maybe_unused
  perf list: Fix documentation of :ppp
  perf bench numa: Fix assertion for nodes bitfield
  ...
2016-03-24 10:02:14 -07:00
Arnd Bergmann 6fe35ab77d First fixes batch for AT91 on 4.6 - DT only fixes:
- prevent the boards from having glitches when inserting/removing SD card on
   sama5d3/d4 Xplained. The regulators should be kept on.
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Merge tag 'at91-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into next/dt2

Merge "First fixes batch for AT91 on 4.6 - DT only fixes" from Nicolas Ferre:
- prevent the boards from having glitches when inserting/removing SD card on
  sama5d3/d4 Xplained. The regulators should be kept on.

* tag 'at91-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91:
  ARM: dts: at91: sama5d4 Xplained: don't disable hsmci regulator
  ARM: dts: at91: sama5d3 Xplained: don't disable hsmci regulator
  ARM: dts: at91: sama5d2 Xplained: add leds node
  ARM: dts: at91: sama5d2 Xplained: add user push button
  ARM: dts: at91: sama5d2 Xplained: set pin muxing for usb gadget and usb host
  ARM: dts: at91: sama5d2: add nand0 and nfc0 nodes
  ARM: dts: at91: sama5d2: add dma properties to UART nodes
  ARM: dts: at91: sama5d2 Xplained: Correct the macb irq pinctrl node
2016-03-24 17:51:11 +01:00
Linus Torvalds d88f48e128 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - fix hotplug bugs
   - fix irq live lock
   - fix various topology handling bugs
   - fix APIC ACK ordering
   - fix PV iopl handling
   - fix speling
   - fix/tweak memcpy_mcsafe() return value
   - fix fbcon bug
   - remove stray prototypes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/msr: Remove unused native_read_tscp()
  x86/apic: Remove declaration of unused hw_nmi_is_cpu_stuck
  x86/oprofile/nmi: Add missing hotplug FROZEN handling
  x86/hpet: Use proper mask to modify hotplug action
  x86/apic/uv: Fix the hotplug notifier
  x86/apb/timer: Use proper mask to modify hotplug action
  x86/topology: Use total_cpus not nr_cpu_ids for logical packages
  x86/topology: Fix Intel HT disable
  x86/topology: Fix logical package mapping
  x86/irq: Cure live lock in fixup_irqs()
  x86/tsc: Prevent NULL pointer deref in calibrate_delay_is_known()
  x86/apic: Fix suspicious RCU usage in smp_trace_call_function_interrupt()
  x86/iopl: Fix iopl capability check on Xen PV
  x86/iopl/64: Properly context-switch IOPL on Xen PV
  selftests/x86: Add an iopl test
  x86/mm, x86/mce: Fix return type/value for memcpy_mcsafe()
  x86/video: Don't assume all FB devices are PCI devices
  arch/x86/irq: Purge useless handler declarations from hw_irq.h
  x86: Fix misspellings in comments
2016-03-24 09:47:32 -07:00
Yoshinori Sato 8cad489261 h8300: switch EARLYCON
earlyprintk is architecture specific option.
earlycon is generic and small footprint.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2016-03-25 01:45:19 +09:00
Geert Uytterhoeven d85816167b h8300: dts: Rename the serial port clock to fck
The clock is really the device functional clock, not the interface
clock. Rename it.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2016-03-25 01:45:19 +09:00
Mark Rutland 691b1e2ebf arm64: mm: allow preemption in copy_to_user_page
Currently we disable preemption in copy_to_user_page; a behaviour that
we inherited from the 32-bit arm code. This was necessary for older
cores without broadcast data cache maintenance, and ensured that cache
lines were dirtied and cleaned by the same CPU. On these systems dirty
cache line migration was not possible, so this was sufficient to
guarantee coherency.

On contemporary systems, cache coherence protocols permit (dirty) cache
lines to migrate between CPUs as a result of speculation, prefetching,
and other behaviours. To account for this, in ARMv8 data cache
maintenance operations are broadcast and affect all data caches in the
domain associated with the VA (i.e. ISH for kernel and user mappings).

In __switch_to we ensure that tasks can be safely migrated in the middle
of a maintenance sequence, using a dsb(ish) to ensure prior explicit
memory accesses are observed and cache maintenance operations are
completed before a task can be run on another CPU.

Given the above, it is not necessary to disable preemption in
copy_to_user_page. This patch removes the preempt_{disable,enable}
calls, permitting preemption.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-03-24 16:32:54 +00:00
Mark Rutland c661cb1c53 arm64: consistently use p?d_set_huge
Commit 324420bf91 ("arm64: add support for ioremap() block
mappings") added new p?d_set_huge functions which do the hard work to
generate and set a correct block entry.

These differ from open-coded huge page creation in the early page table
code by explicitly setting the P?D_TYPE_SECT bits (which are implicitly
retained by mk_sect_prot() for any valid prot), but are otherwise
identical (and cannot fail on arm64).

For simplicity and consistency, make use of these in the initial page
table creation code.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-03-24 16:32:29 +00:00
Ard Biesheuvel d5e5743797 arm64: kaslr: use callee saved register to preserve SCTLR across C call
The KASLR code incorrectly expects the contents of x18 to be preserved
across a call into C code, and uses it to stash the contents of SCTLR_EL1
before enabling the MMU. If the MMU needs to be disabled again to create
the randomized kernel mapping, x18 is written back to SCTLR_EL1, which is
likely to crash the system if x18 has been clobbered by kasan_early_init()
or kaslr_early_init(). So use x22 instead, which is not in use so far in
head.S

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-03-24 16:19:24 +00:00
Helge Deller 119a0a3c13 parisc: Wire up preadv2 and pwritev2 syscalls
Signed-off-by: Helge Deller <deller@gmx.de>
2016-03-23 16:22:42 +01:00
Helge Deller 0de798584b parisc: Use generic extable search and sort routines
Switch to the generic extable search and sort routines which were introduced
with commit a272858 from Ard Biesheuvel. This saves quite some memory in the
vmlinux binary with the 64bit kernel.

Signed-off-by: Helge Deller <deller@gmx.de>
2016-03-23 16:00:46 +01:00
Aaro Koskinen c95a23da2e parisc: Panic immediately when panic_on_oops
PA-RISC wants to sleep 5 seconds before panicking when panic_on_oops
is set, with no apparent reason. Remove this feature, since some users
may want their systems to fail as quickly as possible.

Users who want to delay reboot after panic can use PANIC_TIMEOUT.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
2016-03-23 15:46:16 +01:00
Helge Deller 56649be9e6 parisc: Drop alloc_hugepages and free_hugepages syscalls
The system calls alloc_hugepages() and free_hugepages() were introduced
in Linux 2.5.36 and removed again in 2.5.54. They were never implemented
on parisc, so let's drop them now.

Signed-off-by: Helge Deller <deller@gmx.de>
2016-03-23 15:42:18 +01:00
Linus Torvalds 33c1f638a0 The clk changes for this release cycle are mostly dominated by
new device support in terms of LoC, but there has been some cleanup
 in the core as well as the usual minor clk additions to various
 drivers.
 
 Core:
 
  - parent tracking has been simplified
 
  - CLK_IS_ROOT is now a no-op flag, cleaning up drivers has started
 
  - of_clk_init() doesn't consider disabled DT nodes anymore
 
  - clk_unregister() had an error path bug squashed
 
  - of_clk_get_parent_count() has been fixed to only return unsigned ints
 
  - HAVE_MACH_CLKDEV is removed now that the last arch user (ARM) is gone
 
 New Drivers:
 
  - NXP LPC18xx creg
 
  - QCOM IPQ4019 GCC
 
  - TI dm814x ADPLL
 
  - i.MX6QP
 
 Updates:
 
  - Cyngus audio clks found on Broadcom iProc devices
 
  - Non-critical fixes for BCM2385 PLLs
 
  - Samsung exynos5433 updates for clk id errors, HDMI support,
    suspend/resume simplifications
 
  - USB, CAN, LVDS, and FCP clks on shmobile devices
 
  - sunxi got support for more clks on new SoCs and went through a minor
    refactoring/rewrite to use a simpler factor clk construct
 
  - rockchip added some more clk ids and added suport for fraction dividers
 
  - QCOM GDSCs in msm8996
 
  - A new devm helper to make adding custom actions simpler (acked by Greg)
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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk updates from Stephen Boyd:
 "The clk changes for this release cycle are mostly dominated by new
  device support in terms of LoC, but there has been some cleanup in the
  core as well as the usual minor clk additions to various drivers.

  Core:
   - parent tracking has been simplified
   - CLK_IS_ROOT is now a no-op flag, cleaning up drivers has started
   - of_clk_init() doesn't consider disabled DT nodes anymore
   - clk_unregister() had an error path bug squashed
   - of_clk_get_parent_count() has been fixed to only return unsigned ints
   - HAVE_MACH_CLKDEV is removed now that the last arch user (ARM) is gone

  New Drivers:
   - NXP LPC18xx creg
   - QCOM IPQ4019 GCC
   - TI dm814x ADPLL
   - i.MX6QP

  Updates:
   - Cyngus audio clks found on Broadcom iProc devices
   - Non-critical fixes for BCM2385 PLLs
   - Samsung exynos5433 updates for clk id errors, HDMI support,
     suspend/resume simplifications
   - USB, CAN, LVDS, and FCP clks on shmobile devices
   - sunxi got support for more clks on new SoCs and went through a
     minor refactoring/rewrite to use a simpler factor clk construct
   - rockchip added some more clk ids and added suport for fraction
     dividers
   - QCOM GDSCs in msm8996
   - A new devm helper to make adding custom actions simpler (acked by Greg)"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (197 commits)
  clk: bcm2835: fix check of error code returned by devm_ioremap_resource()
  clk: renesas: div6: use RENESAS for #define
  clk: renesas: Rename header file renesas.h
  clk: max77{686,802}: Remove CLK_IS_ROOT
  clk: versatile: Remove CLK_IS_ROOT
  clk: sunxi: Remove use of variable length array
  clk: fixed-rate: Remove CLK_IS_ROOT
  clk: qcom: Remove CLK_IS_ROOT
  doc: dt: add documentation for lpc1850-creg-clk driver
  clk: add lpc18xx creg clk driver
  clk: lpc32xx: fix compilation warning
  clk: xgene: Add missing parenthesis when clearing divider value
  clk: mb86s7x: Remove CLK_IS_ROOT
  clk: x86: Remove clkdev.h and clk.h includes
  clk: x86: Remove CLK_IS_ROOT
  clk: mvebu: Remove CLK_IS_ROOT
  clk: renesas: move drivers to renesas directory
  clk: si5{14,351,70}: Remove CLK_IS_ROOT
  clk: scpi: Remove CLK_IS_ROOT
  clk: s2mps11: Remove CLK_IS_ROOT
  ...
2016-03-23 06:06:45 -07:00
Prarit Bhargava 9da77666d6 x86/msr: Remove unused native_read_tscp()
After e76b027 ("x86,vdso: Use LSL unconditionally for vgetcpu")
native_read_tscp() is unused in the kernel. The function can be removed like
native_read_tsc() was.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1458687968-9106-1-git-send-email-prarit@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-03-23 12:34:17 +01:00
MaJun dd17a3c40d ARM64: Kconfig: Select mbigen interrupt controller on Hisilicon platform
As a interrupt controller used on some of hisilicon SOCs(660,1610 etc.),
mbigen driver should be enabled when CONFIG_ARCH_HISI is enabled.

Signed-off-by: Ma Jun <majun258@huawei.com>
Cc: mark.rutland@arm.com
Cc: jason@lakedaemon.net
Cc: marc.zyngier@arm.com
Cc: Catalin.Marinas@arm.com
Cc: guohanjun@huawei.com
Cc: Will.Deacon@arm.com
Cc: huxinwei@huawei.com
Cc: lizefan@huawei.com
Cc: dingtianhong@huawei.com
Cc: zhaojunhua@hisilicon.com
Cc: liguozhu@hisilicon.com
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1458723993-21044-2-git-send-email-majun258@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-03-23 12:02:29 +01:00
Linus Torvalds a24e3d414e Merge branch 'akpm' (patches from Andrew)
Merge third patch-bomb from Andrew Morton:

 - more ocfs2 changes

 - a few hotfixes

 - Andy's compat cleanups

 - misc fixes to fatfs, ptrace, coredump, cpumask, creds, eventfd,
   panic, ipmi, kgdb, profile, kfifo, ubsan, etc.

 - many rapidio updates: fixes, new drivers.

 - kcov: kernel code coverage feature.  Like gcov, but not
   "prohibitively expensive".

 - extable code consolidation for various archs

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (81 commits)
  ia64/extable: use generic search and sort routines
  x86/extable: use generic search and sort routines
  s390/extable: use generic search and sort routines
  alpha/extable: use generic search and sort routines
  kernel/...: convert pr_warning to pr_warn
  drivers: dma-coherent: use memset_io for DMA_MEMORY_IO mappings
  drivers: dma-coherent: use MEMREMAP_WC for DMA_MEMORY_MAP
  memremap: add MEMREMAP_WC flag
  memremap: don't modify flags
  kernel/signal.c: add compile-time check for __ARCH_SI_PREAMBLE_SIZE
  mm/mprotect.c: don't imply PROT_EXEC on non-exec fs
  ipc/sem: make semctl setting sempid consistent
  ubsan: fix tree-wide -Wmaybe-uninitialized false positives
  kfifo: fix sparse complaints
  scripts/gdb: account for changes in module data structure
  scripts/gdb: add cmdline reader command
  scripts/gdb: add version command
  kernel: add kcov code coverage
  profile: hide unused functions when !CONFIG_PROC_FS
  hpwdt: use nmi_panic() when kernel panics in NMI handler
  ...
2016-03-22 17:09:14 -07:00
Linus Torvalds b91d9c6716 * Build fixes for PPC KVM
* Miscellaneous bugfixes for ARM KVM
 * Cleanup of memory barrier and removal of redundant barriers
 * x86 fixes: page tracking oops, support for old buggy KVM nested on 4.5
 * Support for protection keys in guests
 * Lockdep fix
 * Another conversion to simple wait queues and raw spinlocks,
   backported from PREEMPT_RT
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull more KVM updates from Paolo Bonzini:
 "Second round of KVM changes for 4.6:

   - build fixes for PPC KVM
   - miscellaneous bugfixes for ARM KVM
   - cleanup of memory barrier and removal of redundant barriers
   - x86 fixes: page tracking oops, support for old buggy KVM nested on 4.5
   - support for protection keys in guests
   - lockdep fix
   - another conversion to simple wait queues and raw spinlocks,
     backported from PREEMPT_RT"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (27 commits)
  KVM: page_track: fix access to NULL slot
  KVM: PPC: do not compile in vfio.o unconditionally
  kvm, rt: change async pagefault code locking for PREEMPT_RT
  KVM/PPC: update the comment of memory barrier in the kvmppc_prepare_to_enter()
  KVM/x86: update the comment of memory barrier in the vcpu_enter_guest()
  KVM: Replace smp_mb() with smp_load_acquire() in the kvm_flush_remote_tlbs()
  KVM/x86: Call smp_wmb() before increasing tlbs_dirty
  KVM: Replace smp_mb() with smp_mb_after_atomic() in the kvm_make_all_cpus_request()
  KVM/x86: Replace smp_mb() with smp_store_mb/release() in the walk_shadow_page_lockless_begin/end()
  KVM: Remove redundant smp_mb() in the kvm_mmu_commit_zap_page()
  KVM, pkeys: expose CPUID/CR4 to guest
  KVM, pkeys: add pkeys support for permission_fault
  KVM, pkeys: introduce pkru_mask to cache conditions
  KVM, pkeys: save/restore PKRU when guest/host switches
  x86: pkey: introduce write_pkru() for KVM
  KVM, pkeys: add pkeys support for xsave state
  KVM, pkeys: disable pkeys for guests in non-paging mode
  KVM: x86: remove magic number with enum cpuid_leafs
  KVM: MMU: return page fault error code from permission_fault
  KVM: fix spin_lock_init order on x86
  ...
2016-03-22 16:28:22 -07:00
Ard Biesheuvel 8fe9752ef1 ia64/extable: use generic search and sort routines
Replace the arch specific versions of search_extable() and
sort_extable() with calls to the generic ones, which now support
relative exception tables as well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Ard Biesheuvel 29934b0fb8 x86/extable: use generic search and sort routines
Replace the arch specific versions of search_extable() and
sort_extable() with calls to the generic ones, which now support
relative exception tables as well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Ard Biesheuvel c352e8b6de s390/extable: use generic search and sort routines
Replace the arch specific versions of search_extable() and
sort_extable() with calls to the generic ones, which now support
relative exception tables as well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Ard Biesheuvel e77986b560 alpha/extable: use generic search and sort routines
Replace the arch specific versions of search_extable() and
sort_extable() with calls to the generic ones, which now support
relative exception tables as well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Dmitry Vyukov 5c9a8750a6 kernel: add kcov code coverage
kcov provides code coverage collection for coverage-guided fuzzing
(randomized testing).  Coverage-guided fuzzing is a testing technique
that uses coverage feedback to determine new interesting inputs to a
system.  A notable user-space example is AFL
(http://lcamtuf.coredump.cx/afl/).  However, this technique is not
widely used for kernel testing due to missing compiler and kernel
support.

kcov does not aim to collect as much coverage as possible.  It aims to
collect more or less stable coverage that is function of syscall inputs.
To achieve this goal it does not collect coverage in soft/hard
interrupts and instrumentation of some inherently non-deterministic or
non-interesting parts of kernel is disbled (e.g.  scheduler, locking).

Currently there is a single coverage collection mode (tracing), but the
API anticipates additional collection modes.  Initially I also
implemented a second mode which exposes coverage in a fixed-size hash
table of counters (what Quentin used in his original patch).  I've
dropped the second mode for simplicity.

This patch adds the necessary support on kernel side.  The complimentary
compiler support was added in gcc revision 231296.

We've used this support to build syzkaller system call fuzzer, which has
found 90 kernel bugs in just 2 months:

  https://github.com/google/syzkaller/wiki/Found-Bugs

We've also found 30+ bugs in our internal systems with syzkaller.
Another (yet unexplored) direction where kcov coverage would greatly
help is more traditional "blob mutation".  For example, mounting a
random blob as a filesystem, or receiving a random blob over wire.

Why not gcov.  Typical fuzzing loop looks as follows: (1) reset
coverage, (2) execute a bit of code, (3) collect coverage, repeat.  A
typical coverage can be just a dozen of basic blocks (e.g.  an invalid
input).  In such context gcov becomes prohibitively expensive as
reset/collect coverage steps depend on total number of basic
blocks/edges in program (in case of kernel it is about 2M).  Cost of
kcov depends only on number of executed basic blocks/edges.  On top of
that, kernel requires per-thread coverage because there are always
background threads and unrelated processes that also produce coverage.
With inlined gcov instrumentation per-thread coverage is not possible.

kcov exposes kernel PCs and control flow to user-space which is
insecure.  But debugfs should not be mapped as user accessible.

Based on a patch by Quentin Casasnovas.

[akpm@linux-foundation.org: make task_struct.kcov_mode have type `enum kcov_mode']
[akpm@linux-foundation.org: unbreak allmodconfig]
[akpm@linux-foundation.org: follow x86 Makefile layout standards]
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: syzkaller <syzkaller@googlegroups.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Tavis Ormandy <taviso@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Kees Cook <keescook@google.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: David Drysdale <drysdale@google.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Alexandre Bounine 9a0b062742 rapidio: add global inbound port write interfaces
Add new Port Write handler registration interfaces that attach PW
handlers to local mport device objects.  This is different from old
interface that attaches PW callback to individual RapidIO device.  The
new interfaces are intended for use for common event handling (e.g.
hot-plug notifications) while the old interface is available for
individual device drivers.

This patch is based on patch proposed by Andre van Herk but preserves
existing per-device interface and adds lock protection for list
handling.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Alexandre Bounine dd64f4fe6f powerpc/fsl_rio: changes to mport registration
Change mport object initialization/registration sequence to match
reworked version of rio_register_mport() in the core code.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Jann Horn 378c6520e7 fs/coredump: prevent fsuid=0 dumps into user-controlled directories
This commit fixes the following security hole affecting systems where
all of the following conditions are fulfilled:

 - The fs.suid_dumpable sysctl is set to 2.
 - The kernel.core_pattern sysctl's value starts with "/". (Systems
   where kernel.core_pattern starts with "|/" are not affected.)
 - Unprivileged user namespace creation is permitted. (This is
   true on Linux >=3.8, but some distributions disallow it by
   default using a distro patch.)

Under these conditions, if a program executes under secure exec rules,
causing it to run with the SUID_DUMP_ROOT flag, then unshares its user
namespace, changes its root directory and crashes, the coredump will be
written using fsuid=0 and a path derived from kernel.core_pattern - but
this path is interpreted relative to the root directory of the process,
allowing the attacker to control where a coredump will be written with
root privileges.

To fix the security issue, always interpret core_pattern for dumps that
are written under SUID_DUMP_ROOT relative to the root directory of init.

Signed-off-by: Jann Horn <jann@thejh.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Andy Lutomirski f970165bee x86/compat: remove is_compat_task()
x86's is_compat_task always checked the current syscall type, not the
task type.  It has no non-arch users any more, so just remove it to
avoid confusion.

On x86, nothing should really be checking the task ABI.  There are
legitimate users for the syscall ABI and for the mm ABI.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Andy Lutomirski 203f79078f sparc/syscall: fix syscall_get_arch
Sparc's syscall_get_arch was buggy: it returned the task arch, not the
syscall arch.  This could confuse seccomp and audit.

I don't think this is as bad for seccomp as it looks: sparc's 32-bit and
64-bit syscalls are numbered the same.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Andy Lutomirski 069923d87e sparc/compat: provide an accurate in_compat_syscall implementation
On sparc64 compat-enabled kernels, any task can make 32-bit and 64-bit
syscalls.  is_compat_task returns true in 32-bit tasks, which does not
necessarily imply that the current syscall is 32-bit.

Provide an in_compat_syscall implementation that checks whether the
current syscall is compat.

As far as I know, sparc is the only architecture on which is_compat_task
checks the compat status of the task and on which the compat status of a
syscall can differ from the compat status of the task.  On x86,
is_compat_task checks the syscall type, not the task type.

[akpm@linux-foundation.org: add comment, per Sam]
[akpm@linux-foundation.org: update comment, per Andy]
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Linus Torvalds 55fc733c7e xen: features and fixes for 4.6-rc0
- Make earlyprintk=xen work for HVM guests.
 - Remove module support for things never built as modules.
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Merge tag 'for-linus-4.6-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from David Vrabel:
 "Features and fixes for 4.6:

  - Make earlyprintk=xen work for HVM guests

  - Remove module support for things never built as modules"

* tag 'for-linus-4.6-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  drivers/xen: make platform-pci.c explicitly non-modular
  drivers/xen: make sys-hypervisor.c explicitly non-modular
  drivers/xen: make xenbus_dev_[front/back]end explicitly non-modular
  drivers/xen: make [xen-]ballon explicitly non-modular
  xen: audit usages of module.h ; remove unnecessary instances
  xen/x86: Drop mode-selecting ifdefs in startup_xen()
  xen/x86: Zero out .bss for PV guests
  hvc_xen: make early_printk work with HVM guests
  hvc_xen: fix xenboot for DomUs
  hvc_xen: add earlycon support
2016-03-22 12:55:17 -07:00
Linus Torvalds b4af7f773e IOMMU Updates for Linux v4.6
This time with:
 
 	* Updates for the Exynos IOMMU driver to make use of default
 	  domains and to add support for the SYSMMU v5
 
 	* New Mediatek IOMMU driver
 
 	* Support for the ARMv7 short descriptor format in the
 	  io-pgtable code
 
 	* Default domain support for the ARM SMMU
 
 	* Couple of other small fixes all over the place
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Merge tag 'iommu-updates-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:

 - updates for the Exynos IOMMU driver to make use of default domains
   and to add support for the SYSMMU v5

 - new Mediatek IOMMU driver

 - support for the ARMv7 short descriptor format in the io-pgtable code

 - default domain support for the ARM SMMU

 - couple of other small fixes all over the place

* tag 'iommu-updates-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (41 commits)
  iommu/ipmmu-vmsa: Add r8a7795 DT binding
  iommu/mediatek: Check for NULL instead of IS_ERR()
  iommu/io-pgtable-armv7s: Fix kmem_cache_alloc() flags
  iommu/mediatek: Fix handling of of_count_phandle_with_args result
  iommu/dma: Fix NEED_SG_DMA_LENGTH dependency
  iommu/mediatek: Mark PM functions as __maybe_unused
  iommu/mediatek: Select ARM_DMA_USE_IOMMU
  iommu/exynos: Use proper readl/writel register interface
  iommu/exynos: Pointers are nto physical addresses
  dts: mt8173: Add iommu/smi nodes for mt8173
  iommu/mediatek: Add mt8173 IOMMU driver
  memory: mediatek: Add SMI driver
  dt-bindings: mediatek: Add smi dts binding
  dt-bindings: iommu: Add binding for mediatek IOMMU
  iommu/ipmmu-vmsa: Use ARCH_RENESAS
  iommu/exynos: Support multiple attach_device calls
  iommu/exynos: Add Maintainers entry for Exynos SYSMMU driver
  iommu/exynos: Add support for v5 SYSMMU
  iommu/exynos: Update device tree documentation
  iommu/exynos: Add support for SYSMMU controller with bogus version reg
  ...
2016-03-22 11:57:43 -07:00
Paolo Bonzini a6adb10622 KVM: page_track: fix access to NULL slot
This happens when doing the reboot test from virt-tests:

[  131.833653] BUG: unable to handle kernel NULL pointer dereference at           (null)
[  131.842461] IP: [<ffffffffa0950087>] kvm_page_track_is_active+0x17/0x60 [kvm]
[  131.850500] PGD 0
[  131.852763] Oops: 0000 [#1] SMP
[  132.007188] task: ffff880075fbc500 ti: ffff880850a3c000 task.ti: ffff880850a3c000
[  132.138891] Call Trace:
[  132.141639]  [<ffffffffa092bd11>] page_fault_handle_page_track+0x31/0x40 [kvm]
[  132.149732]  [<ffffffffa093380f>] paging64_page_fault+0xff/0x910 [kvm]
[  132.172159]  [<ffffffffa092c734>] kvm_mmu_page_fault+0x64/0x110 [kvm]
[  132.179372]  [<ffffffffa06743c2>] handle_exception+0x1b2/0x430 [kvm_intel]
[  132.187072]  [<ffffffffa067a301>] vmx_handle_exit+0x1e1/0xc50 [kvm_intel]
...

Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Fixes: 3d0c27ad6e
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22 17:27:28 +01:00
Paolo Bonzini 0af574be32 KVM: PPC: do not compile in vfio.o unconditionally
Build on 32-bit PPC fails with the following error:

 int kvm_vfio_ops_init(void)
      ^
 In file included from arch/powerpc/kvm/../../../virt/kvm/vfio.c:21:0:
 arch/powerpc/kvm/../../../virt/kvm/vfio.h:8:90: note: previous definition of ‘kvm_vfio_ops_init’ was here
 arch/powerpc/kvm/../../../virt/kvm/vfio.c:292:6: error: redefinition of ‘kvm_vfio_ops_exit’
 void kvm_vfio_ops_exit(void)
             ^
 In file included from arch/powerpc/kvm/../../../virt/kvm/vfio.c:21:0:
 arch/powerpc/kvm/../../../virt/kvm/vfio.h:12:91: note: previous definition of ‘kvm_vfio_ops_exit’ was here
 scripts/Makefile.build:258: recipe for target arch/powerpc/kvm/../../../virt/kvm/vfio.o failed
 make[3]: *** [arch/powerpc/kvm/../../../virt/kvm/vfio.o] Error 1

Check whether CONFIG_KVM_VFIO is set before including vfio.o
in the build.

Reported-by: Pranith Kumar <bobby.prani@gmail.com>
Tested-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22 16:38:38 +01:00
Rik van Riel 9db284f303 kvm, rt: change async pagefault code locking for PREEMPT_RT
The async pagefault wake code can run from the idle task in exception
context, so everything here needs to be made non-preemptible.

Conversion to a simple wait queue and raw spinlock does the trick.

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22 16:38:38 +01:00