1. 16 Oct, 2017 8 commits
    • Jeremy Linton's avatar
      ACPI: Add PPTT to injectable table list · d0a0c63b
      Jeremy Linton authored
      Add ACPI_SIG_PPTT to the table so initrd's can override the
      system topology.
      Signed-off-by: default avatarGeoffrey Blake <geoffrey.blake@arm.com>
      Signed-off-by: default avatarJeremy Linton <jeremy.linton@arm.com>
    • Jeremy Linton's avatar
      arm64: topology: Enable ACPI/PPTT based CPU topology. · b595cead
      Jeremy Linton authored
      Propagate the topology information from the PPTT tree to the
      cpu_topology array. We can get the thread id, core_id and
      cluster_id by assuming certain levels of the PPTT tree correspond
      to those concepts. The package_id is flagged in the tree and can be
      found by passing an arbitrary large level to setup_acpi_cpu_topology()
      which terminates its search when it finds an ACPI node flagged
      as the physical package. If the tree doesn't contain enough
      levels to represent all of thread/core/cod/package then the package
      id will be used for the missing levels.
      Since server/ACPI machines are more likely to be multisocket and NUMA,
      this patch also modifies the default clusters=sockets behavior
      for ACPI machines to sockets=sockets. DT machines continue to
      represent sockets as clusters. For ACPI machines, this results in a
      more normalized view of the topology. Cluster level scheduler decisions
      are still being made due to the "MC" level in the scheduler which has
      knowledge of cache sharing domains.
      This code is loosely based on a combination of code from:
      Xiongfeng Wang <wangxiongfeng2@huawei.com>
      John Garry <john.garry@huawei.com>
      Jeffrey Hugo <jhugo@codeaurora.org>
      Signed-off-by: default avatarJeremy Linton <jeremy.linton@arm.com>
    • Jeremy Linton's avatar
      arm64: Fixup users of topology_physical_package_id · d4d04fa5
      Jeremy Linton authored
      There are a few arm64 specific users (cpufreq, psci, etc) which really
      want the cluster rather than the topology_physical_package_id(). Lets
      convert those users to topology_cod_id(). That way when we start
      differentiating the socket/cluster they will continue to behave correctly.
      Signed-off-by: default avatarJeremy Linton <jeremy.linton@arm.com>
    • Jeremy Linton's avatar
      Topology: Add cluster on die macros and arm64 decoding · 6200004c
      Jeremy Linton authored
      Many modern machines have cluster on die (COD) non-uniformity
      as well as the traditional multi-socket architectures. Reusing
      the multi-socket or NUMA on die concepts for these (as arm64 does)
      breaks down when presented with actual multi-socket/COD machines.
      Similar, problems are also visible on some x86 machines so it
      seems appropriate to start abstracting and making these topologies
      To start a topology_cod_id() macro is added which defaults to returning
      the same information as topology_physical_package_id(). Moving forward
      we can start to spit out the differences.
      For arm64, an additional package_id is added to the cpu_topology array.
      Initially this will be equal to the cluster_id as well.
      Signed-off-by: default avatarJeremy Linton <jeremy.linton@arm.com>
    • Jeremy Linton's avatar
      drivers: base: cacheinfo: arm64: Add support for ACPI based firmware tables · b51da5ce
      Jeremy Linton authored
      The /sys cache entries should support ACPI/PPTT generated cache
      topology information. Lets detect ACPI systems and call
      an arch specific cache_setup_acpi() routine to update the hardware
      probed cache topology.
      For arm64, if ACPI is enabled, determine the max number of cache
      levels and populate them using a PPTT table if one is available.
      Signed-off-by: default avatarJeremy Linton <jeremy.linton@arm.com>
    • Jeremy Linton's avatar
      ACPI: Enable PPTT support on ARM64 · b457f7d4
      Jeremy Linton authored
      Now that we have a PPTT parser, in preparation for its use
      on arm64, lets build it.
      Signed-off-by: default avatarJeremy Linton <jeremy.linton@arm.com>
    • Jeremy Linton's avatar
      ACPI/PPTT: Add Processor Properties Topology Table parsing · ce5f5f1c
      Jeremy Linton authored
      ACPI 6.2 adds a new table, which describes how processing units
      are related to each other in tree like fashion. Caches are
      also sprinkled throughout the tree and describe the properties
      of the caches in relation to other caches and processing units.
      Add the code to parse the cache hierarchy and report the total
      number of levels of cache for a given core using
      acpi_find_last_cache_level() as well as fill out the individual
      cores cache information with cache_setup_acpi() once the
      cpu_cacheinfo structure has been populated by the arch specific
      Further, report peers in the topology using setup_acpi_cpu_topology()
      to report a unique ID for each processing unit at a given level
      in the tree. These unique id's can then be used to match related
      processing units which exist as threads, COD (clusters
      on die), within a given package, etc.
      Signed-off-by: default avatarJeremy Linton <jeremy.linton@arm.com>
    • Linus Torvalds's avatar
      Linux 4.14-rc5 · 33d930e5
      Linus Torvalds authored
  2. 15 Oct, 2017 3 commits
    • Linus Torvalds's avatar
      Merge tag 'char-misc-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · ae7df8f9
      Linus Torvalds authored
      Pull char/misc driver fixes from Greg KH:
       "Here are 4 patches to resolve some char/misc driver issues found these
        past weeks.
        One of them is a mei bugfix and another is a new mei device id. There
        is also a hyper-v fix for a reported issue, and a binder issue fix for
        a problem reported by a few people.
        All of these have been in my tree for a while, I don't know if
        linux-next is really testing much this month. But 0-day is happy with
        them :)"
      * tag 'char-misc-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        binder: fix use-after-free in binder_transaction()
        Drivers: hv: vmbus: Fix bugs in rescind handling
        mei: me: add gemini lake devices id
        mei: always use domain runtime pm callbacks.
    • Linus Torvalds's avatar
      Merge tag 'usb-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 7a263b16
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are a handful of USB driver fixes for 4.14-rc5.
        There is the "usual" usb-serial fixes and device ids, USB gadget
        fixes, and some more fixes found by the fuzz testing that is happening
        on the USB layer right now.
        All of these have been in my tree this week with no reported issues"
      * tag 'usb-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        usb: usbtest: fix NULL pointer dereference
        usb: gadget: configfs: Fix memory leak of interface directory data
        usb: gadget: composite: Fix use-after-free in usb_composite_overwrite_options
        usb: misc: usbtest: Fix overflow in usbtest_do_ioctl()
        usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet
        USB: dummy-hcd: Fix deadlock caused by disconnect detection
        usb: phy: tegra: Fix phy suspend for UDC
        USB: serial: console: fix use-after-free after failed setup
        USB: serial: console: fix use-after-free on disconnect
        USB: serial: qcserial: add Dell DW5818, DW5819
        USB: serial: cp210x: add support for ELV TFD500
        USB: serial: cp210x: fix partnum regression
        USB: serial: option: add support for TP-Link LTE module
        USB: serial: ftdi_sio: add id for Cypress WICED dev board
    • Linus Torvalds's avatar
      Merge tag 'dmaengine-fix-4.14-rc5' of git://git.infradead.org/users/vkoul/slave-dma · 7a23c5ab
      Linus Torvalds authored
      Pull dmaengine fixes from Vinod Koul:
       "Here are fixes for this round
         - fix spinlock usage amd fifo response for altera driver
         - fix ti crossbar race condition
         - fix edma memcpy align"
      * tag 'dmaengine-fix-4.14-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
        dmaengine: altera: fix spinlock usage
        dmaengine: altera: fix response FIFO emptying
        dmaengine: ti-dma-crossbar: Fix possible race condition with dma_inuse
        dmaengine: edma: Align the memcpy acnt array size with the transfer
  3. 14 Oct, 2017 12 commits
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e7a36a6e
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
       "A landry list of fixes:
         - fix reboot breakage on some PCID-enabled system
         - fix crashes/hangs on some PCID-enabled systems
         - fix microcode loading on certain older CPUs
         - various unwinder fixes
         - extend an APIC quirk to more hardware systems and disable APIC
           related warning on virtualized systems
         - various Hyper-V fixes
         - a macro definition robustness fix
         - remove jprobes IRQ disabling
         - various mem-encryption fixes"
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/microcode: Do the family check first
        x86/mm: Flush more aggressively in lazy TLB mode
        x86/apic: Update TSC_DEADLINE quirk with additional SKX stepping
        x86/apic: Silence "FW_BUG TSC_DEADLINE disabled due to Errata" on hypervisors
        x86/mm: Disable various instrumentations of mm/mem_encrypt.c and mm/tlb.c
        x86/hyperv: Fix hypercalls with extended CPU ranges for TLB flushing
        x86/hyperv: Don't use percpu areas for pcpu_flush/pcpu_flush_ex structures
        x86/hyperv: Clear vCPU banks between calls to avoid flushing unneeded vCPUs
        x86/unwind: Disable unwinder warnings on 32-bit
        x86/unwind: Align stack pointer in unwinder dump
        x86/unwind: Use MSB for frame pointer encoding on 32-bit
        x86/unwind: Fix dereference of untrusted pointer
        x86/alternatives: Fix alt_max_short macro to really be a max()
        x86/mm/64: Fix reboot interaction with CR4.PCIDE
        kprobes/x86: Remove IRQ disabling from jprobe handlers
        kprobes/x86: Set up frame pointer in kprobe trampoline
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a339b351
      Linus Torvalds authored
      Pull scheduler fixes from Ingo Molnar:
       "Three fixes that address an SMP balancing performance regression"
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/core: Ensure load_balance() respects the active_mask
        sched/core: Address more wake_affine() regressions
        sched/core: Fix wake_affine() performance regression
    • Linus Torvalds's avatar
      Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7b764ced
      Linus Torvalds authored
      Pull RAS fixes from Ingo Molnar:
       "A boot parameter fix, plus a header export fix"
      * 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mce: Hide mca_cfg
        RAS/CEC: Use the right length for "cec_disable"
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 26c923ab
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Some tooling fixes plus three kernel fixes: a memory leak fix, a
        statistics fix and a crash fix"
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/intel/uncore: Fix memory leaks on allocation failures
        perf/core: Fix cgroup time when scheduling descendants
        perf/core: Avoid freeing static PMU contexts when PMU is unregistered
        tools include uapi bpf.h: Sync kernel ABI header with tooling header
        perf pmu: Unbreak perf record for arm/arm64 with events with explicit PMU
        perf script: Add missing separator for "-F ip,brstack" (and brstackoff)
        perf callchain: Compare dsos (as well) for CCKEY_FUNCTION
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 60a6ca6c
      Linus Torvalds authored
      Pull locking fixes from Ingo Molnar:
       "Two lockdep fixes for bugs introduced by the cross-release dependency
        tracking feature - plus a commit that disables it because performance
        regressed in an absymal fashion on some systems"
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        locking/lockdep: Disable cross-release features for now
        locking/selftest: Avoid false BUG report
        locking/lockdep: Fix stacktrace mess
    • Linus Torvalds's avatar
      Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 2b34218e
      Linus Torvalds authored
      Pull irq fixes from Ingo Molnar:
       "A CPU hotplug related fix, plus two related sanity checks"
      * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        genirq/cpuhotplug: Enforce affinity setting on startup of managed irqs
        genirq/cpuhotplug: Add sanity check for effective affinity mask
        genirq: Warn when effective affinity is not updated
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a515d05e
      Linus Torvalds authored
      Pull objtool fix from Ingo Molnar:
       "A single objtool fix: avoid silently broken ORC debuginfo builds and
        error out instead"
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        objtool: Upgrade libelf-devel warning to error for CONFIG_ORC_UNWINDER
    • Borislav Petkov's avatar
      x86/microcode: Do the family check first · 1f161f67
      Borislav Petkov authored
      On CPUs like AMD's Geode, for example, we shouldn't even try to load
      microcode because they do not support the modern microcode loading
      However, we do the family check *after* the other checks whether the
      loader has been disabled on the command line or whether we're running in
      a guest.
      So move the family checks first in order to exit early if we're being
      loaded on an unsupported family.
      Reported-and-tested-by: default avatarSven Glodowski <glodi1@arcor.de>
      Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
      Cc: <stable@vger.kernel.org> # 4.11..
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Link: http://bugzilla.suse.com/show_bug.cgi?id=1061396
      Link: http://lkml.kernel.org/r/20171012112316.977-1-bp@alien8.de
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
    • Ingo Molnar's avatar
      locking/lockdep: Disable cross-release features for now · b483cf3b
      Ingo Molnar authored
      Johan Hovold reported a big lockdep slowdown on his system, caused by lockdep:
      > I had noticed that the BeagleBone Black boot time appeared to have
      > increased significantly with 4.14 and yesterday I finally had time to
      > investigate it.
      > Boot time (from "Linux version" to login prompt) had in fact doubled
      > since 4.13 where it took 17 seconds (with my current config) compared to
      > the 35 seconds I now see with 4.14-rc4.
      > I quick bisect pointed to lockdep and specifically the following commit:
      >	28a903f6
       ("locking/lockdep: Handle non(or multi)-acquisition of a crosslock")
      Because the final v4.14 release is close, disable the cross-release lockdep
      features for now.
      Bisected-by: default avatarJohan Hovold <johan@kernel.org>
      Debugged-by: default avatarJohan Hovold <johan@kernel.org>
      Reported-by: default avatarJohan Hovold <johan@kernel.org>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Byungchul Park <byungchul.park@lge.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Tony Lindgren <tony@atomide.com>
      Cc: kernel-team@lge.com
      Cc: linux-arm-kernel@lists.infradead.org
      Cc: linux-mm@kvack.org
      Cc: linux-omap@vger.kernel.org
      Link: http://lkml.kernel.org/r/20171014072659.f2yr6mhm5ha3eou7@gmail.com
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
    • Linus Torvalds's avatar
      Merge branch '4.14-fixes' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · be1f16ba
      Linus Torvalds authored
      Pull MIPS fixes from Ralf Baechle:
       "More MIPS fixes for 4.14:
         - Loongson 1: Set the default number of RX and TX queues to
           accomodate for recent changes of stmmac driver.
         - BPF: Fix uninitialised target compiler error.
         - Fix cmpxchg on 32 bit signed ints for 64 bit kernels with
         - Fix generic-board-config.sh for builds using O=
         - Remove pr_err() calls from fpu_emu() for a case which is not a
           kernel error"
      * '4.14-fixes' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
        MIPS: math-emu: Remove pr_err() calls from fpu_emu()
        MIPS: Fix generic-board-config.sh for builds using O=
        MIPS: Fix cmpxchg on 32b signed ints for 64b kernel with !kernel_uses_llsc
        MIPS: loongson1: set default number of rx and tx queues for stmmac
        MIPS: bpf: Fix uninitialised target compiler error
    • Andy Lutomirski's avatar
      x86/mm: Flush more aggressively in lazy TLB mode · b956575b
      Andy Lutomirski authored
      Since commit:
       ("x86/mm: Rework lazy TLB mode and TLB freshness tracking")
      x86's lazy TLB mode has been all the way lazy: when running a kernel thread
      (including the idle thread), the kernel keeps using the last user mm's
      page tables without attempting to maintain user TLB coherence at all.
      From a pure semantic perspective, this is fine -- kernel threads won't
      attempt to access user pages, so having stale TLB entries doesn't matter.
      Unfortunately, I forgot about a subtlety.  By skipping TLB flushes,
      we also allow any paging-structure caches that may exist on the CPU
      to become incoherent.  This means that we can have a
      paging-structure cache entry that references a freed page table, and
      the CPU is within its rights to do a speculative page walk starting
      at the freed page table.
      I can imagine this causing two different problems:
       - A speculative page walk starting from a bogus page table could read
         IO addresses.  I haven't seen any reports of this causing problems.
       - A speculative page walk that involves a bogus page table can install
         garbage in the TLB.  Such garbage would always be at a user VA, but
         some AMD CPUs have logic that triggers a machine check when it notices
         these bogus entries.  I've seen a couple reports of this.
      Boris further explains the failure mode:
      > It is actually more of an optimization which assumes that paging-structure
      > entries are in WB DRAM:
      > "TlbCacheDis: cacheable memory disable. Read-write. 0=Enables
      > performance optimization that assumes PML4, PDP, PDE, and PTE entries
      > are in cacheable WB-DRAM; memory type checks may be bypassed, and
      > addresses outside of WB-DRAM may result in undefined behavior or NB
      > protocol errors. 1=Disables performance optimization and allows PML4,
      > PDP, PDE and PTE entries to be in any memory type. Operating systems
      > that maintain page tables in memory types other than WB- DRAM must set
      > TlbCacheDis to insure proper operation."
      > The MCE generated is an NB protocol error to signal that
      > "Link: A specific coherent-only packet from a CPU was issued to an
      > IO link. This may be caused by software which addresses page table
      > structures in a memory type other than cacheable WB-DRAM without
      > properly configuring MSRC001_0015[TlbCacheDis]. This may occur, for
      > example, when page table structure addresses are above top of memory. In
      > such cases, the NB will generate an MCE if it sees a mismatch between
      > the memory operation generated by the core and the link type."
      > I'm assuming coherent-only packets don't go out on IO links, thus the
      > error.
      To fix this, reinstate TLB coherence in lazy mode.  With this patch
      applied, we do it in one of two ways:
       - If we have PCID, we simply switch back to init_mm's page tables
         when we enter a kernel thread -- this seems to be quite cheap
         except for the cost of serializing the CPU.
       - If we don't have PCID, then we set a flag and switch to init_mm
         the first time we would otherwise need to flush the TLB.
      The /sys/kernel/debug/x86/tlb_use_lazy_mode debug switch can be changed
      to override the default mode for benchmarking.
      In theory, we could optimize this better by only flushing the TLB in
      lazy CPUs when a page table is freed.  Doing that would require
      auditing the mm code to make sure that all page table freeing goes
      through tlb_remove_page() as well as reworking some data structures
      to implement the improved flush logic.
      Reported-by: default avatarMarkus Trippelsdorf <markus@trippelsdorf.de>
      Reported-by: default avatarAdam Borowski <kilobyte@angband.pl>
      Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
      Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Daniel Borkmann <daniel@iogearbox.net>
      Cc: Eric Biggers <ebiggers@google.com>
      Cc: Johannes Hirte <johannes.hirte@datenkhaos.de>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Nadav Amit <nadav.amit@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Roman Kagan <rkagan@virtuozzo.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Fixes: 94b1b03b ("x86/mm: Rework lazy TLB mode and TLB freshness tracking")
      Link: http://lkml.kernel.org/r/20171009170231.fkpraqokz6e4zeco@pd.tnic
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-for-v4.14-rc5' of git://people.freedesktop.org/~airlied/linux · 9aa0d2dd
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Couple of the arm people seem to wake up so this has imx and msm
        fixes, along with a bunch of i915 stable bounds fixes and an amdgpu
        regression fix.
        All seems pretty okay for now"
      * tag 'drm-fixes-for-v4.14-rc5' of git://people.freedesktop.org/~airlied/linux:
        drm/msm: fix _NO_IMPLICIT fencing case
        drm/msm: fix error path cleanup
        drm/msm/mdp5: Remove extra pm_runtime_put call in mdp5_crtc_cursor_set()
        drm/msm/dsi: Use correct pm_runtime_put variant during host_init
        drm/msm: fix return value check in _msm_gem_kernel_new()
        drm/msm: use proper memory barriers for updating tail/head
        drm/msm/mdp5: add missing max size for 8x74 v1
        drm/amdgpu: fix placement flags in amdgpu_ttm_bind
        drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
        gpu: ipu-v3: pre: implement workaround for ERR009624
        gpu: ipu-v3: prg: wait for double buffers to be filled on channel startup
        gpu: ipu-v3: Allow channel burst locking on i.MX6 only
        drm/i915: Read timings from the correct transcoder in intel_crtc_mode_get()
        drm/i915: Order two completing nop_submit_request
        drm/i915: Silence compiler warning for hsw_power_well_enable()
        drm/i915: Use crtc_state_is_legacy_gamma in intel_color_check
        drm/i915/edp: Increase the T12 delay quirk to 1300ms
        drm/i915/edp: Get the Panel Power Off timestamp after panel is off
        sync_file: Return consistent status in SYNC_IOC_FILE_INFO
        drm/atomic: Unref duplicated drm_atomic_state in drm_atomic_helper_resume()
  4. 13 Oct, 2017 17 commits