1. 16 Oct, 2016 1 commit
    • Dan Williams's avatar
      x86/e820: Don't merge consecutive E820_PRAM ranges · 23446cb6
      Dan Williams authored
      Commit:
      
        917db484 ("x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation")
      
      ... fixed up the broken manipulations of max_pfn in the presence of
      E820_PRAM ranges.
      
      However, it also broke the sanitize_e820_map() support for not merging
      E820_PRAM ranges.
      
      Re-introduce the enabling to keep resource boundaries between
      consecutive defined ranges. Otherwise, for example, an environment that
      boots with memmap=2G!8G,2G!10G will end up with a single 4G /dev/pmem0
      device instead of a /dev/pmem0 and /dev/pmem1 device 2G in size.
      Reported-by: default avatarDave Chinner <david@fromorbit.com>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      Cc: <stable@vger.kernel.org>
      Cc: Andy Lutomirski <luto@kernel.org>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Jeff Moyer <jmoyer@redhat.com>
      Cc: Josh Poimboeuf <jpoimboe@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Zhang Yi <yizhan@redhat.com>
      Cc: linux-nvdimm@lists.01.org
      Fixes: 917db484 ("x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation")
      Link: http://lkml.kernel.org/r/147629530854.10618.10383744751594021268.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      23446cb6
  2. 14 Oct, 2016 2 commits
  3. 08 Oct, 2016 3 commits
    • Dave Hansen's avatar
      x86/pkeys: Make protection keys an "eager" feature · d4b05923
      Dave Hansen authored
      Our XSAVE features are divided into two categories: those that
      generate FPU exceptions, and those that do not.  MPX and pkeys do
      not generate FPU exceptions and thus can not be used lazily.  We
      disable them when lazy mode is forced on.
      
      We have a pair of masks to collect these two sets of features, but
      XFEATURE_MASK_PKRU was added to the wrong mask: XFEATURE_MASK_LAZY.
      Fix it by moving the feature to XFEATURE_MASK_EAGER.
      
      Note: this only causes problem if you boot with lazy FPU mode
      (eagerfpu=off) which is *not* the default.  It also only affects
      hardware which is not currently publicly available.  It looks like
      eager mode is going away, but we still need this patch applied
      to any kernel that has protection keys and lazy mode, which is 4.6
      through 4.8 at this point, and 4.9 if the lazy removal isn't sent
      to Linus for 4.9.
      
      Fixes: c8df4009 ("x86/fpu, x86/mm/pkeys: Add PKRU xsave fields and data structures")
      Signed-off-by: default avatarDave Hansen <dave.hansen@intel.com>
      Cc: Dave Hansen <dave@sr71.net>
      Cc: stable@vger.kernel.org
      Link: http://lkml.kernel.org/r/20161007162342.28A49813@viggo.jf.intel.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      d4b05923
    • Thomas Gleixner's avatar
      x86/apic: Prevent pointless warning messages · df610d67
      Thomas Gleixner authored
      Markus reported that he sees new warnings:
      
        APIC: NR_CPUS/possible_cpus limit of 4 reached.  Processor 4/0x84 ignored.
        APIC: NR_CPUS/possible_cpus limit of 4 reached.  Processor 5/0x85 ignored.
      
      This comes from the recent persistant cpuid - nodeid changes. The code
      which emits the warning has been called prior to these changes only for
      enabled processors. Now it's called for disabled processors as well to get
      the possible cpu accounting correct. So if the kernel is compiled for the
      number of actual available/enabled CPUs and the BIOS reports disabled CPUs
      as well then the above warnings are printed.
      
      That's a pointless exercise as it only makes sense if there are more CPUs
      enabled than the kernel supports.
      
      Nake the warning conditional on enabled processors so we are back to the
      state before these changes.
      
      Fixes: 8f54969d ("x86/acpi: Introduce persistent storage for cpuid <-> apicid mapping") 
      Reported-and-tested-by: default avatarMarkus Trippelsdorf <markus@trippelsdorf.de>
      Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
      Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
      Cc: linux-acpi@vger.kernel.org
      Cc: Gu Zheng <guz.fnst@cn.fujitsu.com>
      Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1610071549330.19804@nanosSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      df610d67
    • Thomas Gleixner's avatar
      x86/acpi: Prevent LAPIC id 0xff from being accounted · f3bf1dbe
      Thomas Gleixner authored
      Yinghai reported that the recent changes to make the cpuid - nodeid
      relationship permanent causes a cpuid ordering regression on a system which
      has 2apic enabled..
      
      The reason is that the ACPI local APIC parser has no sanity check for
      apicid 0xff, which is an invalid id. So a CPU id for this invalid local
      APIC id is allocated and therefor breaks the cpuid ordering.
      
      Add a sanity check to acpi_parse_lapic() which ignores the invalid id.
      
      Fixes: 8f54969d ("x86/acpi: Introduce persistent storage for cpuid <-> apicid mapping")
      Reported-by: default avatarYinghai Lu <yinghai@kernel.org>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: Gu Zheng <guz.fnst@cn.fujitsu.com>,
      Cc: Tang Chen <tangchen@cn.fujitsu.com>
      Cc: douly.fnst@cn.fujitsu.com,
      Cc: zhugh.fnst@cn.fujitsu.com
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
      Cc: Len Brown <lenb@kernel.org>
      Cc: Lv Zheng <lv.zheng@intel.com>,
      Cc: robert.moore@intel.com
      Cc: linux-acpi@vger.kernel.org
      Link: https://lkml.kernel.org/r/CAE9FiQVQx6FRXT-RdR7Crz4dg5LeUWHcUSy1KacjR+JgU_vGJg@mail.gmail.com
      f3bf1dbe
  4. 07 Oct, 2016 1 commit
    • Prarit Bhargava's avatar
      arch/x86: Handle non enumerated CPU after physical hotplug · 2a51fe08
      Prarit Bhargava authored
      When a CPU is physically added to a system then the MADT table is not
      updated.
      
      If subsequently a kdump kernel is started on that physically added CPU then
      the ACPI enumeration fails to provide the information for this CPU which is
      now the boot CPU of the kdump kernel.
      
      As a consequence, generic_processor_info() is not invoked for that CPU so
      the number of enumerated processors is 0 and none of the initializations,
      including the logical package id management, are performed.
      
      We have code which relies on the correctness of the logical package map and
      other information which is initialized via generic_processor_info().
      Executing such code will result in undefined behaviour or kernel crashes.
      
      This problem applies only to the kdump kernel because a normal kexec will
      switch to the original boot CPU, which is enumerated in MADT, before
      jumping into the kexec kernel.
      
      The boot code already has a check for num_processors equal 0 in
      prefill_possible_map(). We can use that check as an indicator that the
      enumeration of the boot CPU did not happen and invoke generic_processor_info()
      for it. That initializes the relevant data for the boot CPU and therefore
      prevents subsequent failure.
      
      [ tglx: Refined the code and rewrote the changelog ]
      Signed-off-by: default avatarPrarit Bhargava <prarit@redhat.com>
      Fixes: 1f12e32f ("x86/topology: Create logical package id")
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Len Brown <len.brown@intel.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Juergen Gross <jgross@suse.com>
      Cc: dyoung@redhat.com
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: kexec@lists.infradead.org
      Link: http://lkml.kernel.org/r/1475514432-27682-1-git-send-email-prarit@redhat.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      2a51fe08
  5. 06 Oct, 2016 1 commit
    • Josh Poimboeuf's avatar
      x86/unwind: Fix oprofile module link error · cfee9edd
      Josh Poimboeuf authored
      When compiling on x86 with CONFIG_OPROFILE=m and CONFIG_FRAME_POINTER=n,
      the oprofile module fails to link:
      
        ERROR: ftrace_graph_ret_addr" [arch/x86/oprofile/oprofile.ko] undefined!
      
      The problem was introduced when oprofile was converted to use the new
      x86 unwinder.  When frame pointers are disabled, the "guess" unwinder's
      unwind_get_return_address() is an inline function which calls
      ftrace_graph_ret_addr(), which is not exported.
      
      Fix it by converting the "guess" version of unwind_get_return_address()
      to an exported out-of-line function, just like its frame pointer
      counterpart.
      Reported-by: default avatarKarl Beldan <karl.beldan@gmail.com>
      Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
      Cc: Andy Lutomirski <luto@kernel.org>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Fixes: ec2ad9cc ("oprofile/x86: Convert x86_backtrace() to use the new unwinder")
      Link: http://lkml.kernel.org/r/be08d589f6474df78364e081c42777e382af9352.1475731632.git.jpoimboe@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      cfee9edd
  6. 05 Oct, 2016 2 commits
  7. 04 Oct, 2016 10 commits
    • Mika Westerberg's avatar
      x86/irq: Prevent force migration of irqs which are not in the vector domain · db91aa79
      Mika Westerberg authored
      When a CPU is about to be offlined we call fixup_irqs() that resets IRQ
      affinities related to the CPU in question. The same thing is also done when
      the system is suspended to S-states like S3 (mem).
      
      For each IRQ we try to complete any on-going move regardless whether the
      IRQ is actually part of x86_vector_domain. For each IRQ descriptor we fetch
      its chip_data, assume it is of type struct apic_chip_data and manipulate it
      by clearing old_domain mask etc. For irq_chips that are not part of the
      x86_vector_domain, like those created by various GPIO drivers, will find
      their chip_data being changed unexpectly.
      
      Below is an example where GPIO chip owned by pinctrl-sunrisepoint.c gets
      corrupted after resume:
      
        # cat /sys/kernel/debug/gpio
        gpiochip0: GPIOs 360-511, parent: platform/INT344B:00, INT344B:00:
         gpio-511 (                    |sysfs               ) in  hi
      
        # rtcwake -s10 -mmem
        <10 seconds passes>
      
        # cat /sys/kernel/debug/gpio
        gpiochip0: GPIOs 360-511, parent: platform/INT344B:00, INT344B:00:
         gpio-511 (                    |sysfs               ) in  ?
      
      Note '?' in the output. It means the struct gpio_chip ->get function is
      NULL whereas before suspend it was there.
      
      Fix this by first checking that the IRQ belongs to x86_vector_domain before
      we try to use the chip_data as struct apic_chip_data.
      Reported-and-tested-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
      Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
      Cc: stable@vger.kernel.org # 4.4+
      Link: http://lkml.kernel.org/r/20161003101708.34795-1-mika.westerberg@linux.intel.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      db91aa79
    • Linus Torvalds's avatar
      Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 597f03f9
      Linus Torvalds authored
      Pull CPU hotplug updates from Thomas Gleixner:
       "Yet another batch of cpu hotplug core updates and conversions:
      
         - Provide core infrastructure for multi instance drivers so the
           drivers do not have to keep custom lists.
      
         - Convert custom lists to the new infrastructure. The block-mq custom
           list conversion comes through the block tree and makes the diffstat
           tip over to more lines removed than added.
      
         - Handle unbalanced hotplug enable/disable calls more gracefully.
      
         - Remove the obsolete CPU_STARTING/DYING notifier support.
      
         - Convert another batch of notifier users.
      
         The relayfs changes which conflicted with the conversion have been
         shipped to me by Andrew.
      
         The remaining lot is targeted for 4.10 so that we finally can remove
         the rest of the notifiers"
      
      * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
        cpufreq: Fix up conversion to hotplug state machine
        blk/mq: Reserve hotplug states for block multiqueue
        x86/apic/uv: Convert to hotplug state machine
        s390/mm/pfault: Convert to hotplug state machine
        mips/loongson/smp: Convert to hotplug state machine
        mips/octeon/smp: Convert to hotplug state machine
        fault-injection/cpu: Convert to hotplug state machine
        padata: Convert to hotplug state machine
        cpufreq: Convert to hotplug state machine
        ACPI/processor: Convert to hotplug state machine
        virtio scsi: Convert to hotplug state machine
        oprofile/timer: Convert to hotplug state machine
        block/softirq: Convert to hotplug state machine
        lib/irq_poll: Convert to hotplug state machine
        x86/microcode: Convert to hotplug state machine
        sh/SH-X3 SMP: Convert to hotplug state machine
        ia64/mca: Convert to hotplug state machine
        ARM/OMAP/wakeupgen: Convert to hotplug state machine
        ARM/shmobile: Convert to hotplug state machine
        arm64/FP/SIMD: Convert to hotplug state machine
        ...
      597f03f9
    • Linus Torvalds's avatar
      Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 999dcbe2
      Linus Torvalds authored
      Pull irq updates from Thomas Gleixner:
       "The irq departement proudly presents:
      
         - A rework of the core infrastructure to optimally spread interrupt
           for multiqueue devices. The first version was a bit naive and
           failed to take thread siblings and other details into account.
           Developed in cooperation with Christoph and Keith.
      
         - Proper delegation of softirqs to ksoftirqd, so if ksoftirqd is
           active then no further softirq processsing on interrupt return
           happens. Otherwise we try to delegate and still run another batch
           of network packets in the irq return path, which then tries to
           delegate to ksoftirqd .....
      
         - A proper machine parseable sysfs based alternative for
           /proc/interrupts.
      
         - ACPI support for the GICV3-ITS and ARM interrupt remapping
      
         - Two new irq chips from the ARM SoC zoo: STM32-EXTI and MVEBU-PIC
      
         - A new irq chip for the JCore (SuperH)
      
         - The usual pile of small fixlets in core and irqchip drivers"
      
      * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
        softirq: Let ksoftirqd do its job
        genirq: Make function __irq_do_set_handler() static
        ARM/dts: Add EXTI controller node to stm32f429
        ARM/STM32: Select external interrupts controller
        drivers/irqchip: Add STM32 external interrupts support
        Documentation/dt-bindings: Document STM32 EXTI controller bindings
        irqchip/mips-gic: Use for_each_set_bit to iterate over local IRQs
        pci/msi: Retrieve affinity for a vector
        genirq/affinity: Remove old irq spread infrastructure
        genirq/msi: Switch to new irq spreading infrastructure
        genirq/affinity: Provide smarter irq spreading infrastructure
        genirq/msi: Add cpumask allocation to alloc_msi_entry
        genirq: Expose interrupt information through sysfs
        irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization
        irqchip/gicv3-its: Factor out PCI-MSI part that might be reused for ACPI
        irqchip/gicv3-its: Probe ITS in the ACPI way
        irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI
        irqchip/gicv3-its: Cleanup for ITS domain initialization
        PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table
        ACPI: Add new IORT functions to support MSI domain handling
        ...
      999dcbe2
    • Linus Torvalds's avatar
      Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 5e1b834b
      Linus Torvalds authored
      Pull timer updates from Thomas Gleixner:
       "A rather smalish set of updates for timers and timekeeping:
      
         - Two core fixes to prevent potential undefinded behaviour about
           which gcc is complaining rightfully.
      
         - A fix to prevent stopping the tick on an (soon) offline CPU so it
           can complete the shutdown procedure.
      
         - Wait for clocks to stabilize before making decisions, so a not yet
           validated clock is not rejected.
      
         - The usual pile of fixes to the various clocksource drivers.
      
         - Core code typo and include fixlets"
      
      * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        timekeeping: Include the correct header for errno definitions
        clocksource/drivers/ti-32k: Prevent ftrace recursion
        clocksource/mips-gic-timer: Stop checking cpu_has_counter
        clocksource/mips-gic-timer: Print an error if IRQ setup fails
        tick/nohz: Prevent stopping the tick on an offline CPU
        clocksource/drivers/oxnas: Add OX820 compatible
        clocksource/drivers/timer-atmel-pit: Simplify IRQ handler
        clocksource/drivers/timer-atmel-pit: Remove uselesss WARN_ON_ONCE
        clocksource/drivers/timer-atmel-pit: Drop at91sam926x_pit_common_init
        clocksource/drivers/moxart: Replace panic by pr_err
        clocksource/drivers/moxart: Replace setup_irq by request_irq
        clocksource/drivers/moxart: Add Aspeed support
        clocksource/drivers/moxart: Use struct to hold state
        clocksource/drivers/moxart: Refactor enable/disable
        time: Avoid undefined behaviour in ktime_add_safe()
        time: Avoid undefined behaviour in timespec64_add_safe()
        timekeeping: Prints the amounts of time spent during suspend
        clocksource: Defer override invalidation unless clock is unstable
        hrtimer: Spelling fixes
      5e1b834b
    • Linus Torvalds's avatar
      Merge tag 'arc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc · 49deffe0
      Linus Torvalds authored
      Pull ARC updates from Vineet Gupta:
      
       - ARCv2 support for native 64-bit atomics using LLOCK/SCONDD
         instructions
      
       - Support for upcoming 3.0 release of HS38 cores
      
       - Dwarf unwindinder improvements:
         - enable unwinding of hand written assembler code using CFI
           pseudo-ops
         - switch to .eh_frame (as opposed to historic .debug_frame)
         - get rid of a bunch of adhoc band-aids in the process
      
       - Misc fixes:
         - perf supporting generic cache-references and cache-misses (Alexey)
         - default NODE_SHIFT (Noam Camus)
         - usage of KFLAG instruction to set IE (Yuriy)
      
       - Platforms:
         - Add "model" property across the DT (Alexey)
         - Enable MODULE_* in defconfigs
      
      * tag 'arc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
        ARC: [plat*] enables MODULE*
        ARCv2: fix local_save_flags
        ARC: CONFIG_NODES_SHIFT fix default values
        ARCv2: intc: Use kflag if STATUS32.IE must be reset
        ARC: .exit.* sections can be discarded in .eh_frame regime
        ARC: dw2 unwind: enable cfi pseudo ops in string lib
        ARC: dw2 unwind: add infrastructure for adding cfi pseudo ops to asm
        ARC: entry: make ret_from_system_call local label
        ARC: dw2 unwind: don't force dwarf 2
        ARC: dw2 unwind: switch to .eh_frame based unwinding
        ARC: dw2 unwind: factor CIE specifics for .eh_frame/.debug_frame
        ARC: module: support R_ARC_32_PCREL relocation
        arc: perf: Enable generic "cache-references" and "cache-misses" events
        ARC: [plat-eznps] add missing atomic_fetch_xxx operations
        ARCv2: Implement atomic64 based on LLOCKD/SCONDD instructions
        ARCv2: Support dynamic peripheral address space in HS38 rel 3.0 cores
        ARCv2: identify HS38 rel 3.0 cores
        ARCv2: Add support for ZeBu Emulation platform for HS cores
        arc: Add "model" properly in device tree description of all boards
      49deffe0
    • Linus Torvalds's avatar
      Merge tag 'm68k-for-v4.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k · 5419e783
      Linus Torvalds authored
      Pull m68k updates from Geert Uytterhoeven:
       - cleanups
       - defconfig updates
       - GPG fingerprint update
      
      * tag 'm68k-for-v4.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
        m68k: Migrate exception table users off module.h and onto extable.h
        CREDITS: Update fingerprint for Geert Uytterhoeven
        m68k: Use IS_ENABLED() instead of checking for built-in or module
        m68k/defconfig: Update defconfigs for v4.8-rc1
      5419e783
    • Linus Torvalds's avatar
      Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 8e4ef638
      Linus Torvalds authored
      Pull x86 vdso updates from Ingo Molnar:
       "The main changes in this cycle centered around adding support for
        32-bit compatible C/R of the vDSO on 64-bit kernels, by Dmitry
        Safonov"
      
      * 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/vdso: Use CONFIG_X86_X32_ABI to enable vdso prctl
        x86/vdso: Only define map_vdso_randomized() if CONFIG_X86_64
        x86/vdso: Only define prctl_map_vdso() if CONFIG_CHECKPOINT_RESTORE
        x86/signal: Add SA_{X32,IA32}_ABI sa_flags
        x86/ptrace: Down with test_thread_flag(TIF_IA32)
        x86/coredump: Use pr_reg size, rather that TIF_IA32 flag
        x86/arch_prctl/vdso: Add ARCH_MAP_VDSO_*
        x86/vdso: Replace calculate_addr in map_vdso() with addr
        x86/vdso: Unmap vdso blob on vvar mapping failure
      8e4ef638
    • Linus Torvalds's avatar
      Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 6aebe7f9
      Linus Torvalds authored
      Pull x86 timer updates from Ingo Molnar:
       "This tree includes a HPET overhead micro-optimization plus new TSC
        frequencies for newer Intel CPUs"
      
      * 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/tsc: Add additional Intel CPU models to the crystal quirk list
        x86/tsc: Use cpu id defines instead of hex constants
        x86/hpet: Reduce HPET counter read contention
      6aebe7f9
    • Linus Torvalds's avatar
      Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a6c4e4cd
      Linus Torvalds authored
      Pull x86 platform changes from Ingo Molnar:
       "The main changes in this cycle were:
      
         - SGI UV updates (Andrew Banman)
      
         - Intel MID updates (Andy Shevchenko)
      
         - Initial Mellanox systems platform (Vadim Pasternak)"
      
      * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/platform/mellanox: Fix return value check in mlxplat_init()
        x86/platform/mellanox: Introduce support for Mellanox systems platform
        x86/platform/uv/BAU: Add UV4-specific functions
        x86/platform/uv/BAU: Fix payload queue setup on UV4 hardware
        x86/platform/uv/BAU: Disable software timeout on UV4 hardware
        x86/platform/uv/BAU: Populate ->uvhub_version with UV4 version information
        x86/platform/uv/BAU: Use generic function pointers
        x86/platform/uv/BAU: Add generic function pointers
        x86/platform/uv/BAU: Convert uv_physnodeaddr() use to uv_gpa_to_offset()
        x86/platform/uv/BAU: Clean up pq_init()
        x86/platform/uv/BAU: Clean up and update printks
        x86/platform/uv/BAU: Clean up vertical alignment
        x86/platform/intel-mid: Keep SRAM powered on at boot
        x86/platform/intel-mid: Add Intel Penwell to ID table
        x86/cpu: Rename Merrifield2 to Moorefield
        x86/platform/intel-mid: Implement power off sequence
        x86/platform/intel-mid: Enable SD card detection on Merrifield
        x86/platform/intel-mid: Enable WiFi on Intel Edison
        x86/platform/intel-mid: Run PWRMU command immediately
      a6c4e4cd
    • Linus Torvalds's avatar
      Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a8adc0f0
      Linus Torvalds authored
      Pull x86 cleanups from Ingo Molnar:
       "Header file and a wrapper functions cleanup"
      
      * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86: Migrate exception table users off module.h and onto extable.h
        x86: Clean up various simple wrapper functions
      a8adc0f0
  8. 03 Oct, 2016 14 commits
    • Linus Torvalds's avatar
      Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 3ef0a61a
      Linus Torvalds authored
      Pull x86 boot updates from Ingo Molnar:
       "The changes in this cycle were:
      
         - Save e820 table RAM footprint on larger kernel configurations.
           (Denys Vlasenko)
      
         - pmem related fixes (Dan Williams)
      
         - theoretical e820 boundary condition fix (Wei Yang)"
      
      * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation
        x86/e820: Use much less memory for e820/e820_saved, save up to 120k
        x86/e820: Prepare e280 code for switch to dynamic storage
        x86/e820: Mark some static functions __init
        x86/e820: Fix very large 'size' handling boundary condition
      3ef0a61a
    • Linus Torvalds's avatar
      Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 1a4a2bc4
      Linus Torvalds authored
      Pull low-level x86 updates from Ingo Molnar:
       "In this cycle this topic tree has become one of those 'super topics'
        that accumulated a lot of changes:
      
         - Add CONFIG_VMAP_STACK=y support to the core kernel and enable it on
           x86 - preceded by an array of changes. v4.8 saw preparatory changes
           in this area already - this is the rest of the work. Includes the
           thread stack caching performance optimization. (Andy Lutomirski)
      
         - switch_to() cleanups and all around enhancements. (Brian Gerst)
      
         - A large number of dumpstack infrastructure enhancements and an
           unwinder abstraction. The secret long term plan is safe(r) live
           patching plus maybe another attempt at debuginfo based unwinding -
           but all these current bits are standalone enhancements in a frame
           pointer based debug environment as well. (Josh Poimboeuf)
      
         - More __ro_after_init and const annotations. (Kees Cook)
      
         - Enable KASLR for the vmemmap memory region. (Thomas Garnier)"
      
      [ The virtually mapped stack changes are pretty fundamental, and not
        x86-specific per se, even if they are only used on x86 right now. ]
      
      * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits)
        x86/asm: Get rid of __read_cr4_safe()
        thread_info: Use unsigned long for flags
        x86/alternatives: Add stack frame dependency to alternative_call_2()
        x86/dumpstack: Fix show_stack() task pointer regression
        x86/dumpstack: Remove dump_trace() and related callbacks
        x86/dumpstack: Convert show_trace_log_lvl() to use the new unwinder
        oprofile/x86: Convert x86_backtrace() to use the new unwinder
        x86/stacktrace: Convert save_stack_trace_*() to use the new unwinder
        perf/x86: Convert perf_callchain_kernel() to use the new unwinder
        x86/unwind: Add new unwind interface and implementations
        x86/dumpstack: Remove NULL task pointer convention
        fork: Optimize task creation by caching two thread stacks per CPU if CONFIG_VMAP_STACK=y
        sched/core: Free the stack early if CONFIG_THREAD_INFO_IN_TASK
        lib/syscall: Pin the task stack in collect_syscall()
        x86/process: Pin the target stack in get_wchan()
        x86/dumpstack: Pin the target stack when dumping it
        kthread: Pin the stack via try_get_task_stack()/put_task_stack() in to_live_kthread() function
        sched/core: Add try_get_task_stack() and put_task_stack()
        x86/entry/64: Fix a minor comment rebase error
        iommu/amd: Don't put completion-wait semaphore on stack
        ...
      1a4a2bc4
    • Linus Torvalds's avatar
      Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 110a9e42
      Linus Torvalds authored
      Pull x86 apic updates from Ingo Molnar:
       "The main changes are:
      
         - Persistent CPU/node numbering across CPU hotplug/unplug events.
           This is a pretty involved series of changes that first fetches all
           the information during bootup and then uses it for the various
           hotplug/unplug methods. (Gu Zheng, Dou Liyang)
      
         - IO-APIC hot-add/remove fixes and enhancements. (Rui Wang)
      
         - ... various fixes, cleanups and enhancements"
      
      * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
        x86/apic: Fix silent & fatal merge conflict in __generic_processor_info()
        acpi: Fix broken error check in map_processor()
        acpi: Validate processor id when mapping the processor
        acpi: Provide mechanism to validate processors in the ACPI tables
        x86/acpi: Set persistent cpuid <-> nodeid mapping when booting
        x86/acpi: Enable MADT APIs to return disabled apicids
        x86/acpi: Introduce persistent storage for cpuid <-> apicid mapping
        x86/acpi: Enable acpi to register all possible cpus at boot time
        x86/numa: Online memory-less nodes at boot time
        x86/apic: Get rid of apic_version[] array
        x86/apic: Order irq_enter/exit() calls correctly vs. ack_APIC_irq()
        x86/ioapic: Ignore root bridges without a companion ACPI device
        x86/apic: Update comment about disabling processor focus
        x86/smpboot: Check APIC ID before setting up default routing
        x86/ioapic: Fix IOAPIC failing to request resource
        x86/ioapic: Fix lost IOAPIC resource after hot-removal and hotadd
        x86/ioapic: Fix setup_res() failing to get resource
        x86/ioapic: Support hot-removal of IOAPICs present during boot
        x86/ioapic: Change prototype of acpi_ioapic_add()
        x86/apic, ACPI: Fix incorrect assignment when handling apic/x2apic entries
        ...
      110a9e42
    • Linus Torvalds's avatar
      Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · af79ad2b
      Linus Torvalds authored
      Pull scheduler changes from Ingo Molnar:
       "The main changes are:
      
         - irqtime accounting cleanups and enhancements. (Frederic Weisbecker)
      
         - schedstat debugging enhancements, make it more broadly runtime
           available. (Josh Poimboeuf)
      
         - More work on asymmetric topology/capacity scheduling. (Morten
           Rasmussen)
      
         - sched/wait fixes and cleanups. (Oleg Nesterov)
      
         - PELT (per entity load tracking) improvements. (Peter Zijlstra)
      
         - Rewrite and enhance select_idle_siblings(). (Peter Zijlstra)
      
         - sched/numa enhancements/fixes (Rik van Riel)
      
         - sched/cputime scalability improvements (Stanislaw Gruszka)
      
         - Load calculation arithmetics fixes. (Dietmar Eggemann)
      
         - sched/deadline enhancements (Tommaso Cucinotta)
      
         - Fix utilization accounting when switching to the SCHED_NORMAL
           policy. (Vincent Guittot)
      
         - ... plus misc cleanups and enhancements"
      
      * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
        sched/irqtime: Consolidate irqtime flushing code
        sched/irqtime: Consolidate accounting synchronization with u64_stats API
        u64_stats: Introduce IRQs disabled helpers
        sched/irqtime: Remove needless IRQs disablement on kcpustat update
        sched/irqtime: No need for preempt-safe accessors
        sched/fair: Fix min_vruntime tracking
        sched/debug: Add SCHED_WARN_ON()
        sched/core: Fix set_user_nice()
        sched/fair: Introduce set_curr_task() helper
        sched/core, ia64: Rename set_curr_task()
        sched/core: Fix incorrect utilization accounting when switching to fair class
        sched/core: Optimize SCHED_SMT
        sched/core: Rewrite and improve select_idle_siblings()
        sched/core: Replace sd_busy/nr_busy_cpus with sched_domain_shared
        sched/core: Introduce 'struct sched_domain_shared'
        sched/core: Restructure destroy_sched_domain()
        sched/core: Remove unused @cpu argument from destroy_sched_domain*()
        sched/wait: Introduce init_wait_entry()
        sched/wait: Avoid abort_exclusive_wait() in __wait_on_bit_lock()
        sched/wait: Avoid abort_exclusive_wait() in ___wait_event()
        ...
      af79ad2b
    • Linus Torvalds's avatar
      Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e606d81d
      Linus Torvalds authored
      Pull RAS updates from Ingo Molnar:
       "The main changes were:
      
         - Lots of enhancements for AMD SMCA (Scalable MCA
           features/extensions) systems: extract, decode and print more
           hardware error information and add matching support on the
           injection/testing side as well. (Yazn Ghannam)
      
         - Various MCE handling improvements on modern Intel Xeons. (Tony
           Luck)
      
         - Plus misc fixes and enhancements"
      
      * 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
        x86/RAS/mce_amd_inj: Remove debugfs dir recursively on exit
        x86/RAS/mce_amd_inj: Fix signed wrap around when decrementing index 'i'
        x86/RAS/mce_amd_inj: Fix some W= warnings
        x86/MCE/AMD, EDAC: Handle reserved bank 4 on Fam17h properly
        x86/mce/AMD: Extract the error address on SMCA systems
        x86/mce, EDAC/mce_amd: Print MCA_SYND and MCA_IPID during MCE on SMCA systems
        x86/mce/AMD: Save MCA_IPID in MCE struct on SMCA systems
        x86/mce/AMD: Ensure the deferred error interrupt is of type APIC on SMCA systems
        x86/mce/AMD: Update sysfs bank names for SMCA systems
        x86/mce/AMD, EDAC/mce_amd: Define and use tables for known SMCA IP types
        EDAC/mce_amd: Use SMCA prefix for error descriptions arrays
        EDAC/mce_amd: Add missing SMCA error descriptions
        x86/mce/AMD: Read MSRs on the CPU allocating the threshold blocks
        x86/RAS: Add syndrome support to mce_amd_inj
        EDAC/mce_amd: Print syndrome register value on SMCA systems
        x86/mce: Add support for new MCA_SYND register
        x86/mce/AMD: Use msr_ops.misc() in allocate_threshold_blocks()
        x86/mce: Drop X86_FEATURE_MCE_RECOVERY and the related model string test
        x86/mce: Improve memcpy_mcsafe()
        x86/mce: Add PCI quirks to identify Xeons with machine check recovery
        ...
      e606d81d
    • Linus Torvalds's avatar
      Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 12b7bcb4
      Linus Torvalds authored
      Pull perf updates from Ingo Molnar:
       "The main kernel side changes were:
      
         - uprobes enhancements (Masami Hiramatsu)
      
         - Uncore group events enhancements (David Carrillo-Cisneros)
      
         - x86 Intel: Add support for Skylake server uncore PMUs (Kan Liang)
      
         - x86 Intel: LBR cleanups and enhancements, for better branch
           annotation tracking (Peter Zijlstra)
      
         - x86 Intel: Add support for PTWRITE and power event tracing
           (Alexander Shishkin)
      
         - ... various fixes, cleanups and smaller enhancements.
      
        Lots of tooling changes - a couple of highlights:
      
         - Support event group view with hierarchy mode in 'perf top' and
           'perf report' (Namhyung Kim)
      
           e.g.:
      
           $ perf record -e '{cycles,instructions}' make
           $ perf report --hierarchy --stdio
           ...
           #   Overhead  Command / Shared Object / Symbol
           # ......................  ..................................
           ...
           25.74%  27.18%sh
           19.96%  24.14%libc-2.24.so
            9.55%  14.64%[.] __strcmp_sse2
            1.54%   0.00%[.] __tfind
            1.07%   1.13%[.] _int_malloc
            0.95%   0.00%[.] __strchr_sse2
            0.89%   1.39%[.] __tsearch
            0.76%   0.00%[.] strlen
      
         - Add branch stack / basic block info to 'perf annotate --stdio',
           where for each branch, we add an asm comment after the instruction
           with information on how often it was taken and predicted. See
           example with color output at:
      
             http://vger.kernel.org/~acme/perf/annotate_basic_blocks.png
      
           (Peter Zijlstra)
      
         - Add support for using symbols in address filters with Intel PT and
           ARM CoreSight (hardware assisted tracing facilities) (Adrian
           Hunter, Mathieu Poirier)
      
         - Add support for interacting with Coresight PMU ETMs/PTMs, that are
           IP blocks to perform hardware assisted tracing on a ARM CPU core
           (Mathieu Poirier)
      
         - Support generating cross arch probes, i.e. if you specify a vmlinux
           file for different arch than the one in the host machine,
      
              $ perf probe --definition function_name args
      
           will generate the probe definition string needed to append to the
           target machine /sys/kernel/debug/tracing/kprobes_events file, using
           scripting (Masami Hiramatsu).
      
         - Allow configuring the default 'perf report -s' sort order in
           ~/.perfconfig, for instance, "sym,dso" may be more fitting for
           kernel developers. (Arnaldo Carvalho de Melo)
      
         - ... plus lots of other changes, refactorings, features and fixes"
      
      * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (149 commits)
        perf tests: Add dwarf unwind test for powerpc
        perf probe: Match linkage name with mangled name
        perf probe: Fix to cut off incompatible chars from group name
        perf probe: Skip if the function address is 0
        perf probe: Ignore the error of finding inline instance
        perf intel-pt: Fix decoding when there are address filters
        perf intel-pt: Enable decoder to handle TIP.PGD with missing IP
        perf intel-pt: Read address filter from AUXTRACE_INFO event
        perf intel-pt: Record address filter in AUXTRACE_INFO event
        perf intel-pt: Add a helper function for processing AUXTRACE_INFO
        perf intel-pt: Fix missing error codes processing auxtrace_info
        perf intel-pt: Add support for recording the max non-turbo ratio
        perf intel-pt: Fix snapshot overlap detection decoder errors
        perf probe: Increase debug level of SDT debug messages
        perf record: Add support for using symbols in address filters
        perf symbols: Add dso__last_symbol()
        perf record: Fix error paths
        perf record: Rename label 'out_symbol_exit'
        perf script: Fix vanished idle symbols
        perf evsel: Add support for address filters
        ...
      12b7bcb4
    • Linus Torvalds's avatar
      Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 00bcf5cd
      Linus Torvalds authored
      Pull locking updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - rwsem micro-optimizations (Davidlohr Bueso)
      
         - Improve the implementation and optimize the performance of
           percpu-rwsems. (Peter Zijlstra.)
      
         - Convert all lglock users to better facilities such as percpu-rwsems
           or percpu-spinlocks and remove lglocks. (Peter Zijlstra)
      
         - Remove the ticket (spin)lock implementation. (Peter Zijlstra)
      
         - Korean translation of memory-barriers.txt and related fixes to the
           English document. (SeongJae Park)
      
         - misc fixes and cleanups"
      
      * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
        x86/cmpxchg, locking/atomics: Remove superfluous definitions
        x86, locking/spinlocks: Remove ticket (spin)lock implementation
        locking/lglock: Remove lglock implementation
        stop_machine: Remove stop_cpus_lock and lg_double_lock/unlock()
        fs/locks: Use percpu_down_read_preempt_disable()
        locking/percpu-rwsem: Add down_read_preempt_disable()
        fs/locks: Replace lg_local with a per-cpu spinlock
        fs/locks: Replace lg_global with a percpu-rwsem
        locking/percpu-rwsem: Add DEFINE_STATIC_PERCPU_RWSEMand percpu_rwsem_assert_held()
        locking/pv-qspinlock: Use cmpxchg_release() in __pv_queued_spin_unlock()
        locking/rwsem, x86: Drop a bogus cc clobber
        futex: Add some more function commentry
        locking/hung_task: Show all locks
        locking/rwsem: Scan the wait_list for readers only once
        locking/rwsem: Remove a few useless comments
        locking/rwsem: Return void in __rwsem_mark_wake()
        locking, rcu, cgroup: Avoid synchronize_sched() in __cgroup_procs_write()
        locking/Documentation: Add Korean translation
        locking/Documentation: Fix a typo of example result
        locking/Documentation: Fix wrong section reference
        ...
      00bcf5cd
    • Linus Torvalds's avatar
      Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · de956b8f
      Linus Torvalds authored
      Pull EFI updates from Ingo Molnar:
       "Main changes in this cycle were:
      
         - Refactor the EFI memory map code into architecture neutral files
           and allow drivers to permanently reserve EFI boot services regions
           on x86, as well as ARM/arm64. (Matt Fleming)
      
         - Add ARM support for the EFI ESRT driver. (Ard Biesheuvel)
      
         - Make the EFI runtime services and efivar API interruptible by
           swapping spinlocks for semaphores. (Sylvain Chouleur)
      
         - Provide the EFI identity mapping for kexec which allows kexec to
           work on SGI/UV platforms with requiring the "noefi" kernel command
           line parameter. (Alex Thorlton)
      
         - Add debugfs node to dump EFI page tables on arm64. (Ard Biesheuvel)
      
         - Merge the EFI test driver being carried out of tree until now in
           the FWTS project. (Ivan Hu)
      
         - Expand the list of flags for classifying EFI regions as "RAM" on
           arm64 so we align with the UEFI spec. (Ard Biesheuvel)
      
         - Optimise out the EFI mixed mode if it's unsupported (CONFIG_X86_32)
           or disabled (CONFIG_EFI_MIXED=n) and switch the early EFI boot
           services function table for direct calls, alleviating us from
           having to maintain the custom function table. (Lukas Wunner)
      
         - Miscellaneous cleanups and fixes"
      
      * 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
        x86/efi: Round EFI memmap reservations to EFI_PAGE_SIZE
        x86/efi: Allow invocation of arbitrary boot services
        x86/efi: Optimize away setup_gop32/64 if unused
        x86/efi: Use kmalloc_array() in efi_call_phys_prolog()
        efi/arm64: Treat regions with WT/WC set but WB cleared as memory
        efi: Add efi_test driver for exporting UEFI runtime service interfaces
        x86/efi: Defer efi_esrt_init until after memblock_x86_fill
        efi/arm64: Add debugfs node to dump UEFI runtime page tables
        x86/efi: Remove unused find_bits() function
        fs/efivarfs: Fix double kfree() in error path
        x86/efi: Map in physical addresses in efi_map_region_fixed
        lib/ucs2_string: Speed up ucs2_utf8size()
        firmware-gsmi: Delete an unnecessary check before the function call "dma_pool_destroy"
        x86/efi: Initialize status to ensure garbage is not returned on small size
        efi: Replace runtime services spinlock with semaphore
        efi: Don't use spinlocks for efi vars
        efi: Use a file local lock for efivars
        efi/arm*: esrt: Add missing call to efi_esrt_init()
        efi/esrt: Use memremap not ioremap to access ESRT table in memory
        x86/efi-bgrt: Use efi_mem_reserve() to avoid copying image data
        ...
      de956b8f
    • Linus Torvalds's avatar
      Merge branch 'core-smp-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d7a0dab8
      Linus Torvalds authored
      Pull core SMP updates from Ingo Molnar:
       "Two main change is generic vCPU pinning and physical CPU SMP-call
        support, for Xen to be able to perform certain calls on specific
        physical CPUs - by Juergen Gross"
      
      * 'core-smp-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        smp: Allocate smp_call_on_cpu() workqueue on stack too
        hwmon: Use smp_call_on_cpu() for dell-smm i8k
        dcdbas: Make use of smp_call_on_cpu()
        xen: Add xen_pin_vcpu() to support calling functions on a dedicated pCPU
        smp: Add function to execute a function synchronously on a CPU
        virt, sched: Add generic vCPU pinning support
        xen: Sync xen header
      d7a0dab8
    • Linus Torvalds's avatar
      Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4b978934
      Linus Torvalds authored
      Pull RCU updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - Expedited grace-period changes, most notably avoiding having user
           threads drive expedited grace periods, using a workqueue instead.
      
         - Miscellaneous fixes, including a performance fix for lists that was
           sent with the lists modifications.
      
         - CPU hotplug updates, most notably providing exact CPU-online
           tracking for RCU. This will in turn allow removal of the checks
           supporting RCU's prior heuristic that was based on the assumption
           that CPUs would take no longer than one jiffy to come online.
      
         - Torture-test updates.
      
         - Documentation updates"
      
      * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
        list: Expand list_first_entry_or_null()
        torture: TOROUT_STRING(): Insert a space between flag and message
        rcuperf: Consistently insert space between flag and message
        rcutorture: Print out barrier error as document says
        torture: Add task state to writer-task stall printk()s
        torture: Convert torture_shutdown() to hrtimer
        rcutorture: Convert to hotplug state machine
        cpu/hotplug: Get rid of CPU_STARTING reference
        rcu: Provide exact CPU-online tracking for RCU
        rcu: Avoid redundant quiescent-state chasing
        rcu: Don't use modular infrastructure in non-modular code
        sched: Make wake_up_nohz_cpu() handle CPUs going offline
        rcu: Use rcu_gp_kthread_wake() to wake up grace period kthreads
        rcu: Use RCU's online-CPU state for expedited IPI retry
        rcu: Exclude RCU-offline CPUs from expedited grace periods
        rcu: Make expedited RCU CPU stall warnings respond to controls
        rcu: Stop disabling expedited RCU CPU stall warnings
        rcu: Drive expedited grace periods from workqueue
        rcu: Consolidate expedited grace period machinery
        documentation: Record reason for rcu_head two-byte alignment
        ...
      4b978934
    • Linus Torvalds's avatar
      Merge tag 'pnp-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 72a9cdd0
      Linus Torvalds authored
      Pull PNP update from Rafael Wysocki:
       "This makes more PNP core code explicitly non-modular (Paul Gortmaker)"
      
      * tag 'pnp-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        PNP: isapnp: make core more explicitly non-modular
      72a9cdd0
    • Linus Torvalds's avatar
      Merge tag 'acpi-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 72d39926
      Linus Torvalds authored
      Pull ACPI updates from Rafael Wysocki:
       "First off, the ACPICA code in the kernel is updated to upstream
        revision 20160831 that brings in a few bug fixes and cleanups. In
        particular, it is possible to mask GPEs now (and the sysfs interface
        for GPE control is fixed on top of that), problems related to the
        table loading mechanism are fixed and all code related to FADT version
        2 (which has never been part of the ACPI specification) is dropped.
      
        On the new features front, there is a new watchdog driver based on the
        ACPI WDAT (ACPI Watchdog Action Table), needed on some platforms to
        replace the iTCO watchdog that doesn't work there, and some UART
        devices get new definitions of built-in properties (to be accessed via
        the generic device properties API).
      
        Also, included is a fix for an ACPI-related PCI resorces allocation
        issue and a few problems in the EC driver and in the button and
        battery drivers are fixed.
      
        In addition to that, the ACPI CPPC library is updated to make batching
        of requests sent over the PCC channel possible (which reduces the PCC
        usage overhead substantially in some cases) and to support functional
        fixed hardware (FFH) type of CPPC registers access (which will allow
        CPPC to be used on x86 too in the future).
      
        As usual, there are some assorted fixes and cleanups too.
      
        Specifics:
      
         - Update of the ACPICA code in the kernel to upstream revision
           20160831 with the following major changes:
      
            * New mechanism for GPE masking.
            * Fixes for issues related to the LoadTable operator and table
              loading.
            * Fixes for issues related to so-called module-level code (MLC),
              that is AML that doesn't belong to any methods.
            * Change of the return value of the _OSI method to reflect the
              Windows behavior.
            * GAS (Generic Address Structure) support fix related to 32-bit
              FADT addresses.
            * Elimination of unnecessary FADT version 2 support.
            * ACPI tools fixes and cleanups.
      
           From Bob Moore, Lv Zheng, and Jung-uk Kim.
      
         - ACPI sysfs interface updates to fix GPE handling (on top of the new
           GPE masking mechanism in ACPICA) and issues related to table
           loading (Lv Zheng).
      
         - New watchdog driver based on the ACPI WDAT (ACPI Watchdog Action
           Table), needed on some platforms to replace the iTCO watchdog that
           doesn't work there and related updates of the intel_pmc_ipc,
           i2c/i801 and MFD/lcp_ich drivers (Mika Westerberg).
      
         - Driver core fix to prevent it from leaking secondary fwnode objects
           during device removal (Lukas Wunner).
      
         - New definitions of built-in properties for UART in ACPI-based x86
           SoC drivers and a 8250_dw driver quirk for the APM X-Gene SoC
           (Heikki Krogerus).
      
         - New device ID for the Vulcan SPI controller and constification of
           local strucures in the AMD SoC (APD) ACPI driver (Kamlakant Patel,
           Julia Lawall).
      
         - Fix for a bug causing the allocation of PCI resorces to fail if
           ACPI-enumerated child platform devices are registered below the PCI
           devices in question (Mika Westerberg).
      
         - Change of the default polarity for PCI legacy IRQs to high on
           systems booting wth ACPI on platforms with a GIC interrupt
           controller model fixing the discrepancy between the specification
           and HW behavior (Lorenzo Pieralisi).
      
         - Fixes for the handling of system suspend/resume in the ACPI EC
           driver and update of that driver to make it cope with the cases
           when the EC device defined in the ECDT has to be used throughout
           the entire system life cycle (Lv Zheng).
      
         - Update of the ACPI CPPC library to allow it to batch requests sent
           over the PCC channel (to reduce overhead), to support the fixed
           functional hardware (FFH) CPPC registers access type, to notify the
           mailbox framework about TX completions when the interrupt flag is
           set for the PCC mailbox, and to support HW-Reduced Communication
           Subspace type 2 (Ashwin Chaugule, Prashanth Prakash, Srinivas
           Pandruvada, Hoan Tran).
      
         - ACPI button driver fix and documentation update related to the
           handling of laptop lids (Lv Zheng).
      
         - ACPI battery driver initialization fix (Carlos Garnacho).
      
         - ACPI GPIO enumeration documentation update (Mika Westerberg).
      
         - Assorted updates of the core ACPI bus type code (Lukas Wunner, Lv
           Zheng).
      
         - Assorted cleanups of the ACPI table parsing code and the
           x86-specific ACPI code (Al Stone).
      
         - Fixes for assorted ACPI-related issues found in linux-next (Wei
           Yongjun)"
      
      * tag 'acpi-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (98 commits)
        ACPI / documentation: Use recommended name in GPIO property names
        watchdog: wdat_wdt: Fix warning for using 0 as NULL
        watchdog: wdat_wdt: fix return value check in wdat_wdt_probe()
        platform/x86: intel_pmc_ipc: Do not create iTCO watchdog when WDAT table exists
        i2c: i801: Do not create iTCO watchdog when WDAT table exists
        mfd: lpc_ich: Do not create iTCO watchdog when WDAT table exists
        ACPI / bus: Adjust ACPI subsystem initialization for new table loading mode
        ACPICA: Parser: Fix a regression in LoadTable support
        ACPICA: Tables: Fix "UNLOAD" code path lock issues
        ACPI / watchdog: Add support for WDAT hardware watchdog
        ACPI / platform: Pay attention to parent device's resources
        PCI: Add pci_find_resource()
        ACPI / CPPC: Support PCC with interrupt flag
        ACPI / sysfs: Update sysfs signature handling code
        ACPI / sysfs: Fix an issue for LoadTable opcode
        ACPICA: Tables: Fix a regression in acpi_tb_find_table()
        ACPI / tables: Remove duplicated include from tables.c
        ACPI / APD: constify local structures
        x86: ACPI: make variable names clearer in acpi_parse_madt_lapic_entries()
        x86: ACPI: remove extraneous white space after semicolon
        ...
      72d39926
    • Linus Torvalds's avatar
      Merge tag 'pm-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 72ec9456
      Linus Torvalds authored
      Pull power management updates from Rafael Wysocki:
       "Traditionally, cpufreq is the area with the greatest number of
        changes, but there are fewer of them than last time. There also is
        some activity in the generic power domains and the devfreq frameworks,
        a couple of system suspend and hibernation fixes and some assorted
        changes in other places.
      
        One new feature is the cpufreq change to allow the scheduler to pass
        hints to the governors' utilization update callbacks and some code
        rework based on that. Another one is the support for domain removal in
        the generic power domains framework. Also it is now possible to use
        hibernation with PAGE_POISONING_ZERO enabled and devfreq supports the
        RockChip DFI controller and the rk3399 DMC.
      
        The rest of the changes is mostly fixes and cleanups in a number of
        places.
      
        Specifics:
      
         - Add a mechanism for passing hints from the scheduler to cpufreq
           governors via their utilization update callbacks and use it to
           introduce "IOwait boosting" into the schedutil governor and
           intel_pstate that will make them boost performance if the enqueued
           task was previously waiting on I/O (Rafael Wysocki).
      
         - Fix a schedutil governor problem that causes it to overestimate
           utilization if SMT is in use (Steve Muckle).
      
         - Update defconfigs trying to use the schedutil governor as a module
           which is not possible any more (Javier Martinez Canillas).
      
         - Update the intel_pstate's pstate_sample tracepoint to take "IOwait
           boosting" into account (Srinivas Pandruvada).
      
         - Fix a problem in the cpufreq core causing it to mishandle the
           initialization of CPUs registered after the cpufreq driver (Viresh
           Kumar, Rafael Wysocki).
      
         - Make the cpufreq-dt driver support per-policy governor tunables,
           clean it up and update its Kconfig description (Viresh Kumar).
      
         - Add support for more ARM platforms to the cpufreq-dt driver
           (Chanwoo Choi, Dave Gerlach, Geert Uytterhoeven).
      
         - Make the cpufreq CPPC driver report frequencies in KHz to avoid
           user space compatiblility issues (Al Stone, Hoan Tran).
      
         - Clean up a few cpufreq drivers (st, kirkwood, SCPI) a bit (Colin
           Ian King, Markus Elfring).
      
         - Constify some local structures in the intel_pstate driver (Julia
           Lawall).
      
         - Add a Documentation/cpu-freq/ entry to MAINTAINERS (Jean Delvare).
      
         - Add support for PM domain removal to the generic power domains
           (genpd) framework, add new DT helper functions to it and make it
           always enable debugfs support if available (Jon Hunter, Tomeu
           Vizoso).
      
         - Clean up the generic power domains (genpd) framework and make it
           avoid measuring power-on and power-off latencies during system-wide
           PM transitions (Ulf Hansson).
      
         - Add support for the RockChip DFI controller and the rk3399 DMC to
           the devfreq framework (Lin Huang, Axel Lin, Arnd Bergmann).
      
         - Add COMPILE_TEST to the devfreq framework (Krzysztof Kozlowski,
           Stephen Rothwell).
      
         - Fix a minor issue in the exynos-ppmu devfreq driver and fix up
           devfreq Kconfig indentation style (Wei Yongjun, Jisheng Zhang).
      
         - Fix the system suspend interface to make suspend-to-idle work if
           platform suspend operations have not been registered (Sudeep
           Holla).
      
         - Make it possible to use hibernation with PAGE_POISONING_ZERO
           enabled (Anisse Astier).
      
         - Increas the default timeout of the system suspend/resume watchdog
           and make it depend on EXPERT (Chen Yu).
      
         - Make the operating performance points (OPP) framework avoid using
           OPPs that aren't supported by the platform and fix a build warning
           in it (Dave Gerlach, Arnd Bergmann).
      
         - Fix the ARM cpuidle driver's return value (Christophe Jaillet).
      
         - Make the SmartReflex AVS (Adaptive Voltage Scaling) driver use more
           common logging style (Joe Perches)"
      
      * tag 'pm-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (58 commits)
        PM / OPP: Don't support OPP if it provides supported-hw but platform does not
        cpufreq: st: add missing \n to end of dev_err message
        cpufreq: kirkwood: add missing \n to end of dev_err messages
        PM / Domains: Rename pm_genpd_sync_poweron|poweroff()
        PM / Domains: Don't measure latency of ->power_on|off() during system PM
        PM / Domains: Remove redundant system PM callbacks
        PM / Domains: Simplify detaching a device from its genpd
        PM / devfreq: rk3399_dmc: Remove explictly regulator_put call in .remove
        PM / devfreq: rockchip: add PM_DEVFREQ_EVENT dependency
        PM / OPP: avoid maybe-uninitialized warning
        PM / Domains: Allow holes in genpd_data.domains array
        cpufreq: CPPC: Avoid overflow when calculating desired_perf
        cpufreq: ti: Use generic platdev driver
        cpufreq: intel_pstate: Add io_boost trace
        partial revert of "PM / devfreq: Add COMPILE_TEST for build coverage"
        cpufreq: intel_pstate: Use IOWAIT flag in Atom algorithm
        cpufreq: schedutil: Add iowait boosting
        cpufreq / sched: SCHED_CPUFREQ_IOWAIT flag to indicate iowait condition
        PM / Domains: Add support for removing nested PM domains by provider
        PM / Domains: Add support for removing PM domains
        ...
      72ec9456
    • Linus Torvalds's avatar
      Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 7af8a0f8
      Linus Torvalds authored
      Pull arm64 updates from Will Deacon:
       "It's a bit all over the place this time with no "killer feature" to
        speak of.  Support for mismatched cache line sizes should help people
        seeing whacky JIT failures on some SoCs, and the big.LITTLE perf
        updates have been a long time coming, but a lot of the changes here
        are cleanups.
      
        We stray outside arch/arm64 in a few areas: the arch/arm/ arch_timer
        workaround is acked by Russell, the DT/OF bits are acked by Rob, the
        arch_timer clocksource changes acked by Marc, CPU hotplug by tglx and
        jump_label by Peter (all CC'd).
      
        Summary:
      
         - Support for execute-only page permissions
         - Support for hibernate and DEBUG_PAGEALLOC
         - Support for heterogeneous systems with mismatches cache line sizes
         - Errata workarounds (A53 843419 update and QorIQ A-008585 timer bug)
         - arm64 PMU perf updates, including cpumasks for heterogeneous systems
         - Set UTS_MACHINE for building rpm packages
         - Yet another head.S tidy-up
         - Some cleanups and refactoring, particularly in the NUMA code
         - Lots of random, non-critical fixes across the board"
      
      * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (100 commits)
        arm64: tlbflush.h: add __tlbi() macro
        arm64: Kconfig: remove SMP dependence for NUMA
        arm64: Kconfig: select OF/ACPI_NUMA under NUMA config
        arm64: fix dump_backtrace/unwind_frame with NULL tsk
        arm/arm64: arch_timer: Use archdata to indicate vdso suitability
        arm64: arch_timer: Work around QorIQ Erratum A-008585
        arm64: arch_timer: Add device tree binding for A-008585 erratum
        arm64: Correctly bounds check virt_addr_valid
        arm64: migrate exception table users off module.h and onto extable.h
        arm64: pmu: Hoist pmu platform device name
        arm64: pmu: Probe default hw/cache counters
        arm64: pmu: add fallback probe table
        MAINTAINERS: Update ARM PMU PROFILING AND DEBUGGING entry
        arm64: Improve kprobes test for atomic sequence
        arm64/kvm: use alternative auto-nop
        arm64: use alternative auto-nop
        arm64: alternative: add auto-nop infrastructure
        arm64: lse: convert lse alternatives NOP padding to use __nops
        arm64: barriers: introduce nops and __nops macros for NOP sequences
        arm64: sysreg: replace open-coded mrs_s/msr_s with {read,write}_sysreg_s
        ...
      7af8a0f8
  9. 02 Oct, 2016 6 commits
    • Linus Torvalds's avatar
      Linux 4.8 · c8d2bc9b
      Linus Torvalds authored
      c8d2bc9b
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm · f76d9c61
      Linus Torvalds authored
      Pull ARM fixes from Russell King:
       "Three relatively small fixes for ARM:
      
         - Roger noticed that dma_max_pfn() was calculating the upper limit
           wrongly, by adding the PFN offset of memory twice.
      
         - A fix from Robin to correct parsing of MPIDR values when the
           address size is larger than one BE32 unit.
      
         - A fix from Srinivas to ensure that we do not rely on the boot
           loader (or previous Linux kernel) setting the translation table
           base register a certain way in the decompressor, which can lead to
           crashes"
      
      * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
        ARM: 8618/1: decompressor: reset ttbcr fields to use TTBR0 on ARMv7
        ARM: 8617/1: dma: fix dma_max_pfn()
        ARM: 8616/1: dt: Respect property size when parsing CPUs
      f76d9c61
    • Srinivas Ramana's avatar
      ARM: 8618/1: decompressor: reset ttbcr fields to use TTBR0 on ARMv7 · 117e5e9c
      Srinivas Ramana authored
      If the bootloader uses the long descriptor format and jumps to
      kernel decompressor code, TTBCR may not be in a right state.
      Before enabling the MMU, it is required to clear the TTBCR.PD0
      field to use TTBR0 for translation table walks.
      
      The commit dbece458 ("ARM: 7501/1: decompressor:
      reset ttbcr for VMSA ARMv7 cores") does the reset of TTBCR.N, but
      doesn't consider all the bits for the size of TTBCR.N.
      
      Clear TTBCR.PD0 field and reset all the three bits of TTBCR.N to
      indicate the use of TTBR0 and the correct base address width.
      
      Fixes: dbece458 ("ARM: 7501/1: decompressor: reset ttbcr for VMSA ARMv7 cores")
      Acked-by: default avatarRobin Murphy <robin.murphy@arm.com>
      Signed-off-by: default avatarSrinivas Ramana <sramana@codeaurora.org>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      117e5e9c
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · be67d60b
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "The last regression fixes for 4.8 final:
      
         - Two patches addressing the fallout of the CR4 optimizations which
           caused CR4-less machines to fail.
      
         - Fix the VDSO build on big endian machines
      
         - Take care of FPU initialization if no CPUID is available otherwise
           task struct size ends up being zero
      
         - Fix up context tracking in case load_gs_index fails"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/entry/64: Fix context tracking state warning when load_gs_index fails
        x86/boot: Initialize FPU and X86_FEATURE_ALWAYS even if we don't have CPUID
        x86/vdso: Fix building on big endian host
        x86/boot: Fix another __read_cr4() case on 486
        x86/init: Fix cr4_init_shadow() on CR4-less machines
      be67d60b
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · 66188fb1
      Linus Torvalds authored
      Pull MIPS fixes from Ralf Baechle:
       "Another round of fixes:
      
         - CM: Fix mips_cm_max_vp_width for non-MT kernels on MT systems
         - CPS: Avoid BUG() when offlining pre-r6 CPUs
         - DEC: Avoid gas warnings due to suspicious instruction scheduling by
           manually expanding assembler macros.
         - FTLB: Fix configuration by moving confiuguratoin after probing
         - FTLB: clear execution hazard after changing FTLB enable
         - Highmem: Fix detection of unsupported highmem with cache aliases
         - I6400: Don't touch FTLBP chicken bits
         - microMIPS: Fix BUILD_ROLLBACK_PROLOGUE
         - Malta: Fix IOCU disable switch read for MIPS64
         - Octeon: Fix probing of devices attached to GPIO lines
         - uprobes: Misc small fixes"
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
        MIPS: CM: Fix mips_cm_max_vp_width for non-MT kernels on MT systems
        MIPS: Fix detection of unsupported highmem with cache aliases
        MIPS: Malta: Fix IOCU disable switch read for MIPS64
        MIPS: Fix BUILD_ROLLBACK_PROLOGUE for microMIPS
        MIPS: clear execution hazard after changing FTLB enable
        MIPS: Configure FTLB after probing TLB sizes from config4
        MIPS: Stop setting I6400 FTLBP
        MIPS: DEC: Avoid la pseudo-instruction in delay slots
        MIPS: Octeon: mark GPIO controller node not populated after IRQ init.
        MIPS: uprobes: fix use of uninitialised variable
        MIPS: uprobes: remove incorrect set_orig_insn
        MIPS: fix uretprobe implementation
        MIPS: smp-cps: Avoid BUG() when offlining pre-r6 CPUs
      66188fb1
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 0c7fc30f
      Linus Torvalds authored
      Pull sparc fixes from David Miller:
      
       1) Fix section mismatches in some builds, from Paul Gortmaker.
      
       2) Need to count huge zero page mappings when doing TSB sizing, from
          Mike Kravetz.
      
       3) Fix handing of cpu_possible_mask when nr_cpus module option is
          specified, from Atish Patra.
      
       4) Don't allocate irq stacks until nr_irqs has been processed, also
          from Atish Patra.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc64: Fix non-SMP build.
        sparc64: Fix irq stack bootmem allocation.
        sparc64: Fix cpu_possible_mask if nr_cpus is set
        sparc64 mm: Fix more TSB sizing issues
        sparc64: fix section mismatch in find_numa_latencies_for_group
      0c7fc30f