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This patch adds the Power Management Controller driver as a PCI driver
for Intel Core SoC architecture.
This driver can utilize debugging capabilities and supported features
as exposed by the Power Management Controller.
Please refer to the below specification for more details on PMC features.
http://www.intel.in/content/www/in/en/chipsets/100-series-chipset-datasheet-vol-2.html
The current version of this driver exposes SLP_S0_RESIDENCY counter.
This counter can be used for detecting fragile SLP_S0 signal related
failures and take corrective actions when PCH SLP_S0 signal is not
asserted after kernel freeze as part of suspend to idle flow
(echo freeze > /sys/power/state).
Intel Platform Controller Hub (PCH) asserts SLP_S0 signal when it
detects favorable conditions to enter its low power mode. As a
pre-requisite the SoC should be in deepest possible Package C-State
and devices should be in low power mode. For example, on Skylake SoC
the deepest Package C-State is Package C10 or PC10. Suspend to idle
flow generally leads to PC10 state but PC10 state may not be sufficient
for realizing the platform wide power potential which SLP_S0 signal
assertion can provide.
SLP_S0 signal is often connected to the Embedded Controller (EC) and the
Power Management IC (PMIC) for other platform power management related
optimizations.
In general, SLP_S0 assertion == PC10 + PCH low power mode + ModPhy Lanes
power gated + PLL Idle.
As part of this driver, a mechanism to read the SLP_S0_RESIDENCY is exposed
as an API and also debugfs features are added to indicate SLP_S0 signal
assertion residency in microseconds.
echo freeze > /sys/power/state
wake the system
cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Vishwanath Somayaji <vishwanath.somayaji@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek:
- new option CONFIG_TRIM_UNUSED_KSYMS which does a two-pass build and
unexports symbols which are not used in the current config [Nicolas
Pitre]
- several kbuild rule cleanups [Masahiro Yamada]
- warning option adjustments for gcov etc [Arnd Bergmann]
- a few more small fixes
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (31 commits)
kbuild: move -Wunused-const-variable to W=1 warning level
kbuild: fix if_change and friends to consider argument order
kbuild: fix adjust_autoksyms.sh for modules that need only one symbol
kbuild: fix ksym_dep_filter when multiple EXPORT_SYMBOL() on the same line
gcov: disable -Wmaybe-uninitialized warning
gcov: disable tree-loop-im to reduce stack usage
gcov: disable for COMPILE_TEST
Kbuild: disable 'maybe-uninitialized' warning for CONFIG_PROFILE_ALL_BRANCHES
Kbuild: change CC_OPTIMIZE_FOR_SIZE definition
kbuild: forbid kernel directory to contain spaces and colons
kbuild: adjust ksym_dep_filter for some cmd_* renames
kbuild: Fix dependencies for final vmlinux link
kbuild: better abstract vmlinux sequential prerequisites
kbuild: fix call to adjust_autoksyms.sh when output directory specified
kbuild: Get rid of KBUILD_STR
kbuild: rename cmd_as_s_S to cmd_cpp_s_S
kbuild: rename cmd_cc_i_c to cmd_cpp_i_c
kbuild: drop redundant "PHONY += FORCE"
kbuild: delete unnecessary "@:"
kbuild: mark help target as PHONY
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git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull misc DAX updates from Vishal Verma:
"DAX error handling for 4.7
- Until now, dax has been disabled if media errors were found on any
device. This enables the use of DAX in the presence of these
errors by making all sector-aligned zeroing go through the driver.
- The driver (already) has the ability to clear errors on writes that
are sent through the block layer using 'DSMs' defined in ACPI 6.1.
Other misc changes:
- When mounting DAX filesystems, check to make sure the partition is
page aligned. This is a requirement for DAX, and previously, we
allowed such unaligned mounts to succeed, but subsequent
reads/writes would fail.
- Misc/cleanup fixes from Jan that remove unused code from DAX
related to zeroing, writeback, and some size checks"
* tag 'dax-misc-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: fix a comment in dax_zero_page_range and dax_truncate_page
dax: for truncate/hole-punch, do zeroing through the driver if possible
dax: export a low-level __dax_zero_page_range helper
dax: use sb_issue_zerout instead of calling dax_clear_sectors
dax: enable dax in the presence of known media errors (badblocks)
dax: fallback from pmd to pte on error
block: Update blkdev_dax_capable() for consistency
xfs: Add alignment check for DAX mount
ext2: Add alignment check for DAX mount
ext4: Add alignment check for DAX mount
block: Add bdev_dax_supported() for dax mount checks
block: Add vfs_msg() interface
dax: Remove redundant inode size checks
dax: Remove pointless writeback from dax_do_io()
dax: Remove zeroing from dax_io()
dax: Remove dead zeroing code from fault handlers
ext2: Avoid DAX zeroing to corrupt data
ext2: Fix block zeroing in ext2_get_blocks() for DAX
dax: Remove complete_unwritten argument
DAX: move RADIX_DAX_ definitions to dax.c
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes: EFI, entry code, pkeys and MPX fixes, TASK_SIZE cleanups
and a tsc frequency table fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Switch from TASK_SIZE to TASK_SIZE_MAX in the page fault code
x86/fsgsbase/64: Use TASK_SIZE_MAX for FSBASE/GSBASE upper limits
x86/mm/mpx: Work around MPX erratum SKD046
x86/entry/64: Fix stack return address retrieval in thunk
x86/efi: Fix 7-parameter efi_call()s
x86/cpufeature, x86/mm/pkeys: Fix broken compile-time disabling of pkeys
x86/tsc: Add missing Cherrytrail frequency to the table
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
"Mostly tooling and PMU driver fixes, but also a number of late updates
such as the reworking of the call-chain size limiting logic to make
call-graph recording more robust, plus tooling side changes for the
new 'backwards ring-buffer' extension to the perf ring-buffer"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
perf record: Read from backward ring buffer
perf record: Rename variable to make code clear
perf record: Prevent reading invalid data in record__mmap_read
perf evlist: Add API to pause/resume
perf trace: Use the ptr->name beautifier as default for "filename" args
perf trace: Use the fd->name beautifier as default for "fd" args
perf report: Add srcline_from/to branch sort keys
perf evsel: Record fd into perf_mmap
perf evsel: Add overwrite attribute and check write_backward
perf tools: Set buildid dir under symfs when --symfs is provided
perf trace: Only auto set call-graph to "dwarf" when syscalls are being traced
perf annotate: Sort list of recognised instructions
perf annotate: Fix identification of ARM blt and bls instructions
perf tools: Fix usage of max_stack sysctl
perf callchain: Stop validating callchains by the max_stack sysctl
perf trace: Fix exit_group() formatting
perf top: Use machine->kptr_restrict_warned
perf trace: Warn when trying to resolve kernel addresses with kptr_restrict=1
perf machine: Do not bail out if not managing to read ref reloc symbol
perf/x86/intel/p4: Trival indentation fix, remove space
...
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git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This set of changes introduces an atomic API to the PWM subsystem.
This is influenced by the DRM atomic API that was introduced a while
back, though it is obviously a lot simpler. The fundamental idea
remains the same, though: drivers provide a single callback to
implement the atomic configuration of a PWM channel.
As a side-effect the PWM subsystem gains the ability for initial state
retrieval, so that the logical state mirrors that of the hardware.
Many use-cases don't care about this, but for others it is essential.
These new features require changes in all users, which these patches
take care of. The core is transitioned to use the atomic callback if
available and provides a fallback mechanism for other drivers.
Changes to transition users and drivers to the atomic API are
postponed to v4.8"
* tag 'pwm/for-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (30 commits)
pwm: Add information about polarity, duty cycle and period to debugfs
pwm: Switch to the atomic API
pwm: Update documentation
pwm: Add core infrastructure to allow atomic updates
pwm: Add hardware readout infrastructure
pwm: Move the enabled/disabled info into pwm_state
pwm: Introduce the pwm_state concept
pwm: Keep PWM state in sync with hardware state
ARM: Explicitly apply PWM config extracted from pwm_args
drm: i915: Explicitly apply PWM config extracted from pwm_args
input: misc: pwm-beeper: Explicitly apply PWM config extracted from pwm_args
input: misc: max8997: Explicitly apply PWM config extracted from pwm_args
backlight: lm3630a: explicitly apply PWM config extracted from pwm_args
backlight: lp855x: Explicitly apply PWM config extracted from pwm_args
backlight: lp8788: Explicitly apply PWM config extracted from pwm_args
backlight: pwm_bl: Use pwm_get_args() where appropriate
fbdev: ssd1307fb: Use pwm_get_args() where appropriate
regulator: pwm: Use pwm_get_args() where appropriate
leds: pwm: Use pwm_get_args() where appropriate
input: misc: max77693: Use pwm_get_args() where appropriate
...
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Pull watchdog updates from Wim Van Sebroeck:
- add support for Fintek F81865 Super-IO chip
- add support for watchdogs (RWDT and SWDT) found on RCar Gen3 based
SoCs from Renesas
- octeon: Handle the FROZEN hot plug notifier actions
- f71808e_wdt fixes and cleanups
- some small improvements in code and documentation
* git://www.linux-watchdog.org/linux-watchdog:
MAINTAINERS: Add file patterns for watchdog device tree bindings
Documentation: Add ebc-c384_wdt watchdog-parameters.txt entry
watchdog: shwdt: Use setup_timer()
watchdog: cpwd: Use setup_timer()
arm64: defconfig: enable Renesas Watchdog Timer
watchdog: renesas-wdt: add driver
watchdog: remove error message when unable to allocate watchdog device
watchdog: f71808e_wdt: Fix WDTMOUT_STS register read
watchdog: f71808e_wdt: Fix typo
watchdog: f71808e_wdt: Add F81865 support
watchdog: sp5100_tco: properly check for new register layouts
watchdog: core: Fix circular locking dependency
watchdog: core: fix trivial typo in a comment
watchdog: hpwdt: Adjust documentation to match latest kernel module parameters.
watchdog: imx2_wdt: add external reset support via dt prop
watchdog: octeon: Handle the FROZEN hot plug notifier actions.
watchdog: qcom: Report reboot reason
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller:
- Add native high-resolution timing code for sched_clock() and other
timing functions based on the processor internal cr16 cycle counters
- Add syscall tracepoint support
- Add regset support
- Speed up get_user() and put_user() functions
- Updated futex.h to match generic implementation (John David Anglin)
- A few smaller ftrace build fixes
- Fixed thuge-gen kernel self test to utilize architectured MAP_HUGETLB
value
- Added parisc architecture to seccomp_bpf kernel self test
- Various typo fixes (Andrea Gelmini)
* 'parisc-4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Whitespace cleanups in unistd.h
parisc: Use long jump to reach ftrace_return_to_handler()
parisc: Fix typo in fpudispatch.c
parisc: Fix typos in eisa_eeprom.h
parisc: Fix typo in ldcw.h
parisc: Fix typo in pdc.h
parisc: Update futex.h to match generic implementation
parisc: Merge ftrace C-helper and assembler functions into .text.hot section
selftests/thuge-gen: Use platform specific MAP_HUGETLB value
parisc: Add native high-resolution sched_clock() implementation
parisc: Add ARCH_TRACEHOOK and regset support
parisc: Add 64bit get_user() and put_user() for 32bit kernel
parisc: Simplify and speed up get_user() and put_user()
parisc: Add syscall tracepoint support
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The function to update APICv on/off state (in particular, to deactivate
it when enabling Hyper-V SynIC) is incomplete: it doesn't adjust
APICv-related fields among secondary processor-based VM-execution
controls. As a result, Windows 2012 guests get stuck when SynIC-based
auto-EOI interrupt intersected with e.g. an IPI in the guest.
In addition, the MSR intercept bitmap isn't updated every time "virtualize
x2APIC mode" is toggled. This path can only be triggered by a malicious
guest, because Windows didn't use x2APIC but rather their own synthetic
APIC access MSRs; however a guest running in a SynIC-enabled VM could
switch to x2APIC and thus obtain direct access to host APIC MSRs
(CVE-2016-4440).
The patch fixes those omissions.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Reported-by: Steve Rutherford <srutherford@google.com>
Reported-by: Yang Zhang <yang.zhang.wz@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Clean up whitespaces and mark unused syscalls as such.
Signed-off-by: Helge Deller <deller@gmx.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"This is a first set of bug fixes on top of what was merged for 4.7.
Two patches for lpc32xx address a harmless build warning that was just
introduced, one patch for the mediatek soc driver fixes a warning for
arm64, and the pxa changes are minor cleanups that should have been
part of the original pull requests but that I forgot to apply to the
cleanup-fixes branch earlier"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: lpc32xx: fix NR_IRQS confict
ARM: lpc32xx: remove legacy irq controller driver
soc: mtk-pmic-wrap: avoid integer overflow warning
ARM: pxa: Remove CLK_IS_ROOT
ARM: pxa: activate pinctrl for device-tree machines
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late DT updates from Arnd Bergmann:
"This is a collection of a few late fixes and other misc stuff that had
dependencies on things being merged from other trees.
The Renesas R-Car power domain handling, and the Nvidia Tegra USB
support both hand notable changes that required changing the DT
binding in a way that only provides compatibility with old DT blobs on
new kernels but not vice versa. As a consequence, the DT changes are
based on top of the driver changes and are now in this branch.
For NXP i.MX and Samsung Exynos, the changes in here depend on other
changes that got merged through the clk maintainer tree"
* tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (35 commits)
ARM: dts: exynos: Add support of Bus frequency using VDD_INT for exynos5422-odroidxu3
ARM: dts: exynos: Add bus nodes using VDD_INT for Exynos542x SoC
ARM: dts: exynos: Add NoC Probe dt node for Exynos542x SoC
ARM: dts: exynos: Add support of bus frequency for exynos4412-trats/odroidu3
ARM: dts: exynos: Expand the voltage range of buck1/3 regulator for exynos4412-odroidu3
ARM: dts: exynos: Add support of bus frequency using VDD_INT for exynos3250-rinato
ARM: dts: exynos: Add exynos4412-ppmu-common dtsi to delete duplicate PPMU nodes
ARM: dts: exynos: Add bus nodes using VDD_MIF for Exynos4210
ARM: dts: exynos: Add bus nodes using VDD_INT for Exynos4x12
ARM: dts: exynos: Add bus nodes using VDD_MIF for Exynos4x12
ARM: dts: exynos: Add bus nodes using VDD_INT for Exynos3250
ARM: dts: exynos: Add DMC bus frequency for exynos3250-rinato/monk
ARM: dts: exynos: Add DMC bus node for Exynos3250
ARM: tegra: Enable XUSB on Nyan
ARM: tegra: Enable XUSB on Jetson TK1
ARM: tegra: Enable XUSB on Venice2
ARM: tegra: Add Tegra124 XUSB controller
ARM: tegra: Move Tegra124 to the new XUSB pad controller binding
ARM: dts: r8a7794: Use SYSC "always-on" PM Domain
ARM: dts: r8a7793: Use SYSC "always-on" PM Domain
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic cleanup from Arnd Bergmann:
"I have only one patch for asm-generic in this release, this one is
from James Hogan and updates the generic system call table for
renameat2 so we don't need to provide both renameat and renameat2 in
newly added architectures"
* tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: Drop renameat syscall from default list
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With the change to sparse IRQs, the lpc32xx platform gets a warning about
conflicting macros:
In file included from arch/arm/mach-lpc32xx/irq.c:31:0:
arch/arm/mach-lpc32xx/include/mach/irqs.h:115:0: warning: "NR_IRQS" redefined
#define NR_IRQS 96
arch/arm/include/asm/irq.h:9:0: note: this is the location of the previous definition
#define NR_IRQS NR_IRQS_LEGACY
One such instance was in the old irq driver that is now removed by
the previous patch, but any other file including mach/irqs.h still
has the issue. Since none of them use this constant, we can just
remove the old definition.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 8cb17b5ed017 ("irqchip: Add LPC32xx interrupt controller driver")
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New NXP LPC32xx irq chip driver is used instead of a legacy one.
[this also fixes a harmless build warning about the NR_IRQS redefinition]
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Pull MTD updates from Brian Norris:
"First cycle with Boris as NAND maintainer! Many (most) bullets stolen
from him.
Generic:
- Migrated NAND LED trigger to be a generic MTD trigger
NAND:
- Introduction of the "ECC algorithm" concept, to avoid overloading
the ECC mode field too much more
- Replaced the nand_ecclayout infrastructure with something a little
more flexible (finally!) and future proof
- Rework of the OMAP GPMC and NAND drivers; the TI folks pulled some
of this into their own tree as well
- Prepare the sunxi NAND driver to receive DMA support
- Handle bitflips in erased pages on GPMI revisions that do not
support this in hardware.
SPI NOR:
- Start using the spi_flash_read() API for SPI drivers that support
it (i.e., SPI drivers with special memory-mapped flash modes)
And other small scattered improvments"
* tag 'for-linus-20160523' of git://git.infradead.org/linux-mtd: (155 commits)
mtd: spi-nor: support GigaDevice gd25lq64c
mtd: nand_bch: fix spelling of "probably"
mtd: brcmnand: respect ECC algorithm set by NAND subsystem
gpmi-nand: Handle ECC Errors in erased pages
Documentation: devicetree: deprecate "soft_bch" nand-ecc-mode value
mtd: nand: add support for "nand-ecc-algo" DT property
mtd: mtd: drop NAND_ECC_SOFT_BCH enum value
mtd: drop support for NAND_ECC_SOFT_BCH as "soft_bch" mapping
mtd: nand: read ECC algorithm from the new field
mtd: nand: fsmc: validate ECC setup by checking algorithm directly
mtd: nand: set ECC algorithm to Hamming on fallback
staging: mt29f_spinand: set ECC algorithm explicitly
CRIS v32: nand: set ECC algorithm explicitly
mtd: nand: atmel: set ECC algorithm explicitly
mtd: nand: davinci: set ECC algorithm explicitly
mtd: nand: bf5xx: set ECC algorithm explicitly
mtd: nand: omap2: Fix high memory dma prefetch transfer
mtd: nand: omap2: Start dma request before enabling prefetch
mtd: nandsim: add __init attribute
mtd: nand: move of_get_nand_xxx() helpers into nand_base.c
...
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen bug fixes from David Vrabel.
* tag 'for-linus-4.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: use same main loop for counting and remapping pages
xen/events: Don't move disabled irqs
xen/x86: actually allocate legacy interrupts on PV guests
Xen: don't warn about 2-byte wchar_t in efi
xen/gntdev: reduce copy batch size to 16
xen/x86: don't lose event interrupts
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git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2
Pull nios2 update from Ley Foon Tan:
- add order-only DTC dependency to %.dtb target
- fix libgcc location detection
* tag 'nios2-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
nios2: Add order-only DTC dependency to %.dtb target
nios2: Fix libgcc location detection
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Pull Microblaze updates from Michal Simek:
- Wire-up new syscalls
- Fix link error
* tag 'microblaze-4.7-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: pci: export isa_io_base to fix link errors
microblaze: Wire up userfaultfd, membarrier, mlock2 syscalls
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Instead of having two functions for cycling through the E820 map in
order to count to be remapped pages and remap them later, just use one
function with a caller supplied sub-function called for each region to
be processed. This eliminates the possibility of a mismatch between
both loops which showed up in certain configurations.
Suggested-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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b4ff8389ed14 is incomplete: relies on nr_legacy_irqs() to get the number
of legacy interrupts when actually nr_legacy_irqs() returns 0 after
probe_8259A(). Use NR_IRQS_LEGACY instead.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
CC: stable@vger.kernel.org
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On slow platforms with unreliable TSC, such as QEMU emulated machines,
it is possible for the kernel to request the next event in the past. In
that case, in the current implementation of xen_vcpuop_clockevent, we
simply return -ETIME. To be precise the Xen returns -ETIME and we pass
it on. However the result of this is a missed event, which simply causes
the kernel to hang.
Instead it is better to always ask the hypervisor for a timer event,
even if the timeout is in the past. That way there are no lost
interrupts and the kernel survives. To do that, remove the
VCPU_SSHOTTMR_future flag.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Juergen Gross <jgross@suse.com>
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Useful when tracing nested setups where the guest may trigger more than
the host usually does. But even some typical host exits were missing.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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These were supposed to be a bitwise operation but there is a typo.
The result is mostly harmless, but sparse correctly complains.
Fixes: 44a95dae1d22 ('KVM: x86: Detect and Initialize AVIC support')
Fixes: 18f40c53e10f ('svm: Add VMEXIT handlers for AVIC')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-next
KVM/ARM Changes for v4.7 take 2
"The GIC is dead; Long live the GIC"
This set of changes include the new vgic, which is a reimplementation of
our horribly broken legacy vgic implementation. The two implementations
will live side-by-side (with the new being the configured default) for
one kernel release and then we'll remove it.
Also fixes a non-critical issue with virtual abort injection to guests.
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Merge yet more updates from Andrew Morton:
- Oleg's "wait/ptrace: assume __WALL if the child is traced". It's a
kernel-based workaround for existing userspace issues.
- A few hotfixes
- befs cleanups
- nilfs2 updates
- sys_wait() changes
- kexec updates
- kdump
- scripts/gdb updates
- the last of the MM queue
- a few other misc things
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (84 commits)
kgdb: depends on VT
drm/amdgpu: make amdgpu_mn_get wait for mmap_sem killable
drm/radeon: make radeon_mn_get wait for mmap_sem killable
drm/i915: make i915_gem_mmap_ioctl wait for mmap_sem killable
uprobes: wait for mmap_sem for write killable
prctl: make PR_SET_THP_DISABLE wait for mmap_sem killable
exec: make exec path waiting for mmap_sem killable
aio: make aio_setup_ring killable
coredump: make coredump_wait wait for mmap_sem for write killable
vdso: make arch_setup_additional_pages wait for mmap_sem for write killable
ipc, shm: make shmem attach/detach wait for mmap_sem killable
mm, fork: make dup_mmap wait for mmap_sem for write killable
mm, proc: make clear_refs killable
mm: make vm_brk killable
mm, elf: handle vm_brk error
mm, aout: handle vm_brk failures
mm: make vm_munmap killable
mm: make vm_mmap killable
mm: make mmap_sem for write waits killable for mm syscalls
MAINTAINERS: add co-maintainer for scripts/gdb
...
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Pull arch/tile updates from Chris Metcalf:
"This is an even quieter cycle than usual"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
Fix typo
Fix typo
Fix typo
tile: sort the "select" lines in the TILE/TILEGX configs
tile: clarify barrier semantics of atomic_add_return
tile/defconfigs: Remove CONFIG_IPV6_PRIVACY
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata sata_dwc_460ex updates from Tejun Heo:
"Patches to bring sata_dwc_460ex up to snuff.
It was a separate pull request because it depends on dmaengine dw
platform changes which are now in mainline"
* 'for-4.7-dw' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (24 commits)
ata: dwc: add DMADEVICES dependency
powerpc/4xx: Device tree update for the 460ex DWC SATA
ata: sata_dwc_460ex: make debug messages neat
ata: sata_dwc_460ex: supply physical address of FIFO to DMA
ata: sata_dwc_460ex: use devm_ioremap
ata: sata_dwc_460ex: tidy up sata_dwc_clear_dmacr()
ata: sata_dwc_460ex: use readl/writel_relaxed()
ata: sata_dwc_460ex: switch to new dmaengine_terminate_* API
ata: sata_dwc_460ex: add __iomem to register base pointer
ata: sata_dwc_460ex: get rid of incorrect cast
ata: sata_dwc_460ex: get rid of some pointless casts
ata: sata_dwc_460ex: remove empty libata callback
ata: sata_dwc_460ex: correct HOSTDEV{P}_FROM_*() macros
ata: sata_dwc_460ex: get rid of global data
ata: sata_dwc_460ex: add phy support
ata: sata_dwc_460ex: use "dmas" DT property to find dma channel
ata: sata_dwc_460ex: don't call ata_sff_qc_issue() on DMA commands
ata: sata_dwc_460ex: skip dma setup for non-dma commands
ata: sata_dwc_460ex: select only core part of DMA driver
ata: sata_dwc_460ex: DMA is always a flow controller
...
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most architectures are relying on mmap_sem for write in their
arch_setup_additional_pages. If the waiting task gets killed by the oom
killer it would block oom_reaper from asynchronous address space reclaim
and reduce the chances of timely OOM resolving. Wait for the lock in
the killable mode and return with EINTR if the task got killed while
waiting.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Andy Lutomirski <luto@amacapital.net> [x86 vdso]
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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vm_brk is allowed to fail but load_aout_binary simply ignores the error
and happily continues. I haven't noticed any problem from that in real
life but later patches will make the failure more likely because vm_brk
will become killable (resp. mmap_sem for write waiting will become
killable) so we should be more careful now.
The error handling should be quite straightforward because there are
calls to vm_mmap which check the error properly already. The only
notable exception is set_brk which is called after beyond_if label. But
nothing indicates that we cannot move it above set_binfmt as the two do
not depend on each other and fail before we do set_binfmt and alter
reference counting.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This option was replaced by PAGE_COUNTER which is selected by MEMCG.
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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arch_kexec_protect(unprotect)_crashkres()
Commit 3f625002581b ("kexec: introduce a protection mechanism for the
crashkernel reserved memory") is a similar mechanism for protecting the
crash kernel reserved memory to previous crash_map/unmap_reserved_pages()
implementation, the new one is more generic in name and cleaner in code
(besides, some arch may not be allowed to unmap the pgtable).
Therefore, this patch consolidates them, and uses the new
arch_kexec_protect(unprotect)_crashkres() to replace former
crash_map/unmap_reserved_pages() which by now has been only used by
S390.
The consolidation work needs the crash memory to be mapped initially,
this is done in machine_kdump_pm_init() which is after
reserve_crashkernel(). Once kdump kernel is loaded, the new
arch_kexec_protect_crashkres() implemented for S390 will actually
unmap the pgtable like before.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Minfei Huang <mhuang@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Implement the protection method for the crash kernel memory reservation
for the 64-bit x86 kdump.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Minfei Huang <mhuang@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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CONFIG_MIPS32_N32=y but CONFIG_BINFMT_ELF disabled results in the
following linker errors:
arch/mips/built-in.o: In function `elf_core_dump':
binfmt_elfn32.c:(.text+0x23dbc): undefined reference to `elf_core_extra_phdrs'
binfmt_elfn32.c:(.text+0x246e4): undefined reference to `elf_core_extra_data_size'
binfmt_elfn32.c:(.text+0x248d0): undefined reference to `elf_core_write_extra_phdrs'
binfmt_elfn32.c:(.text+0x24ac4): undefined reference to `elf_core_write_extra_data'
CONFIG_MIPS32_O32=y but CONFIG_BINFMT_ELF disabled results in the following
linker errors:
arch/mips/built-in.o: In function `elf_core_dump':
binfmt_elfo32.c:(.text+0x28a04): undefined reference to `elf_core_extra_phdrs'
binfmt_elfo32.c:(.text+0x29330): undefined reference to `elf_core_extra_data_size'
binfmt_elfo32.c:(.text+0x2951c): undefined reference to `elf_core_write_extra_phdrs'
binfmt_elfo32.c:(.text+0x29710): undefined reference to `elf_core_write_extra_data'
This is because binfmt_elfn32 and binfmt_elfo32 are using symbols from
elfcore but for these configurations elfcore will not be built.
Fixed by making elfcore selectable by a separate config symbol which
unlike the current mechanism can also be used from other directories
than kernel/, then having each flavor of ELF that relies on elfcore.o,
select it in Kconfig, including CONFIG_MIPS32_N32 and CONFIG_MIPS32_O32
which fixes this issue.
Link: http://lkml.kernel.org/r/20160520141705.GA1913@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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m32r allmodconfig build was failing with the error:
ERROR: "smp_flush_cache_all" [drivers/misc/lkdtm.ko] undefined!
lkdtm driver at drivers/misc is using flush_icache_range() which for
m32r is defined as smp_flush_cache_all() if CONFIG_SMP is defined. But
as smp_flush_cache_all() was not exported so the build was failing with
the error of undefined symbol.
Link: http://lkml.kernel.org/r/1464001182-8329-1-git-send-email-sudipm.mukherjee@gmail.com
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Depending on config options we will need to use a long jump to reach
ftrace_return_to_handler(). Additionally only compile the
parisc_return_to_handler code when CONFIG_FUNCTION_GRAPH_TRACER is set.
Signed-off-by: Helge Deller <deller@gmx.de>
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Pull drm updates from Dave Airlie:
"Here's the main drm pull request for 4.7, it's been a busy one, and
I've been a bit more distracted in real life this merge window. Lots
more ARM drivers, not sure if it'll ever end. I think I've at least
one more coming the next merge window.
But changes are all over the place, support for AMD Polaris GPUs is in
here, some missing GM108 support for nouveau (found in some Lenovos),
a bunch of MST and skylake fixes.
I've also noticed a few fixes from Arnd in my inbox, that I'll try and
get in asap, but I didn't think they should hold this up.
New drivers:
- Hisilicon kirin display driver
- Mediatek MT8173 display driver
- ARC PGU - bitstreamer on Synopsys ARC SDP boards
- Allwinner A13 initial RGB output driver
- Analogix driver for DisplayPort IP found in exynos and rockchip
DRM Core:
- UAPI headers fixes and C++ safety
- DRM connector reference counting
- DisplayID mode parsing for Dell 5K monitors
- Removal of struct_mutex from drivers
- Connector registration cleanups
- MST robustness fixes
- MAINTAINERS updates
- Lockless GEM object freeing
- Generic fbdev deferred IO support
panel:
- Support for a bunch of new panels
i915:
- VBT refactoring
- PLL computation cleanups
- DSI support for BXT
- Color manager support
- More atomic patches
- GEM improvements
- GuC fw loading fixes
- DP detection fixes
- SKL GPU hang fixes
- Lots of BXT fixes
radeon/amdgpu:
- Initial Polaris support
- GPUVM/Scheduler/Clock/Power improvements
- ASYNC pageflip support
- New mesa feature support
nouveau:
- GM108 support
- Power sensor support improvements
- GR init + ucode fixes.
- Use GPU provided topology information
vmwgfx:
- Add host messaging support
gma500:
- Some cleanups and fixes
atmel:
- Bridge support
- Async atomic commit support
fsl-dcu:
- Timing controller for LCD support
- Pixel clock polarity support
rcar-du:
- Misc fixes
exynos:
- Pipeline clock support
- Exynoss4533 SoC support
- HW trigger mode support
- export HDMI_PHY clock
- DECON5433 fixes
- Use generic prime functions
- use DMA mapping APIs
rockchip:
- Lots of little fixes
vc4:
- Render node support
- Gamma ramp support
- DPI output support
msm:
- Mostly cleanups and fixes
- Conversion to generic struct fence
etnaviv:
- Fix for prime buffer handling
- Allow hangcheck to be coalesced with other wakeups
tegra:
- Gamme table size fix"
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (1050 commits)
drm/edid: add displayid detailed 1 timings to the modelist. (v1.1)
drm/edid: move displayid validation to it's own function.
drm/displayid: Iterate over all DisplayID blocks
drm/edid: move displayid tiled block parsing into separate function.
drm: Nuke ->vblank_disable_allowed
drm/vmwgfx: Report vmwgfx version to vmware.log
drm/vmwgfx: Add VMWare host messaging capability
drm/vmwgfx: Kill some lockdep warnings
drm/nouveau/gr/gf100-: fix race condition in fecs/gpccs ucode
drm/nouveau/core: recognise GM108 chipsets
drm/nouveau/gr/gm107-: fix touching non-existent ppcs in attrib cb setup
drm/nouveau/gr/gk104-: share implementation of ppc exception init
drm/nouveau/gr/gk104-: move rop_active_fbps init to nonctx
drm/nouveau/bios/pll: check BIT table version before trying to parse it
drm/nouveau/bios/pll: prevent oops when limits table can't be parsed
drm/nouveau/volt/gk104: round up in gk104_volt_set
drm/nouveau/fb/gm200: setup mmu debug buffer registers at init()
drm/nouveau/fb/gk20a,gm20b: setup mmu debug buffer registers at init()
drm/nouveau/fb/gf100-: allocate mmu debug buffers
drm/nouveau/fb: allow chipset-specific actions for oneinit()
...
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Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
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Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
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Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull motr tracing updates from Steven Rostedt:
"Three more changes.
- I forgot that I had another selftest to stress test the ftrace
instance creation. It was actually suppose to go into the 4.6
merge window, but I never committed it. I almost forgot about it
again, but noticed it was missing from your tree.
- Soumya PN sent me a clean up patch to not disable interrupts when
taking the tasklist_lock for read, as it's unnecessary because that
lock is never taken for write in irq context.
- Newer gcc's can cause the jump in the function_graph code to the
global ftrace_stub label to be a short jump instead of a long one.
As that jump is dynamically converted to jump to the trace code to
do function graph tracing, and that conversion expects a long jump
it can corrupt the ftrace_stub itself (it's directly after that
call). One way to prevent gcc from using a short jump is to
declare the ftrace_stub as a weak function, which we do here to
keep gcc from optimizing too much"
* tag 'trace-v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace/x86: Set ftrace_stub to weak to prevent gcc from using short jumps to it
ftrace: Don't disable irqs when taking the tasklist_lock read_lock
ftracetest: Add instance created, delete, read and enable event test
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Pull sparc updates from David Miller:
"Some 32-bit kgdb cleanups from Sam Ravnborg, and a hugepage TLB flush
overhead fix on 64-bit from Nitin Gupta"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: Reduce TLB flushes during hugepte changes
aeroflex/greth: fix warning about unused variable
openprom: fix warning
sparc32: drop superfluous cast in calls to __nocache_pa()
sparc32: fix build with STRICT_MM_TYPECHECKS
sparc32: use proper prototype for trapbase
sparc32: drop local prototype in kgdb_32
sparc32: drop hardcoding trap_level in kgdb_trap
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I'm looking at trying to possibly merge the 32-bit and 64-bit versions
of the x86 uaccess.h implementation, but first this needs to be cleaned
up.
For example, the 32-bit version of "__copy_from_user_inatomic()" is
mostly the special cases for the constant size, and it's actually almost
never relevant. Most users aren't actually using a constant size
anyway, and the few cases that do small constant copies are better off
just using __get_user() instead.
So get rid of the unnecessary complexity.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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I'm looking at trying to possibly merge the 32-bit and 64-bit versions
of the x86 uaccess.h implementation, but first this needs to be cleaned
up.
For example, the 32-bit version of "__copy_to_user_inatomic()" is mostly
the special cases for the constant size, and it's actually never
relevant. Every user except for one aren't actually using a constant
size anyway, and the one user that uses it is better off just using
__put_user() instead.
So get rid of the unnecessary complexity.
[ The same cleanup should likely happen to __copy_from_user_inatomic()
as well, but that one has a lot more users that I need to take a look
at first ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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The attached patch updates the parisc version of futex.h to match the
current generic implementation except for the spinlock code.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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When enabling all-branch ftrace support (CONFIG_PROFILE_ALL_BRANCHES)
the kernel gets really huge and some ftrace assembler functions like
mcount can't reach the ftrace helper functions which are written in C.
Avoid this problem of too distant branches by moving the ftrace C-helper
functions into the .text.hot section which is put in front of the
standard .text section by the linker.
Signed-off-by: Helge Deller <deller@gmx.de>
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