1. 11 May, 2019 19 commits
  2. 06 May, 2019 1 commit
  3. 05 May, 2019 5 commits
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7178fb0b
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "I'd like to apologize for this very late pull request: I was dithering
        through the week whether to send the fixes, and then yesterday Jiri's
        crash fix for a regression introduced in this cycle clearly marked
        perf/urgent as 'must merge now'.
      
        Most of the commits are tooling fixes, plus there's three kernel fixes
        via four commits:
      
          - race fix in the Intel PEBS code
      
          - fix an AUX bug and roll back a previous attempt
      
          - fix AMD family 17h generic HW cache-event perf counters
      
        The largest diffstat contribution comes from the AMD fix - a new event
        table is introduced, which is a fairly low risk change but has a large
        linecount"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/intel: Fix race in intel_pmu_disable_event()
        perf/x86/intel/pt: Remove software double buffering PMU capability
        perf/ring_buffer: Fix AUX software double buffering
        perf tools: Remove needless asm/unistd.h include fixing build in some places
        tools arch uapi: Copy missing unistd.h headers for arc, hexagon and riscv
        tools build: Add -ldl to the disassembler-four-args feature test
        perf cs-etm: Always allocate memory for cs_etm_queue::prev_packet
        perf cs-etm: Don't check cs_etm_queue::prev_packet validity
        perf report: Report OOM in status line in the GTK UI
        perf bench numa: Add define for RUSAGE_THREAD if not present
        tools lib traceevent: Change tag string for error
        perf annotate: Fix build on 32 bit for BPF annotation
        tools uapi x86: Sync vmx.h with the kernel
        perf bpf: Return value with unlocking in perf_env__find_btf()
        MAINTAINERS: Include vendor specific files under arch/*/events/*
        perf/x86/amd: Update generic hardware cache events for Family 17h
      7178fb0b
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 70c9fb57
      Linus Torvalds authored
      Pull scheduler fix from Ingo Molnar:
       "Fix a kobject memory leak in the cpufreq code"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/cpufreq: Fix kobject memleak
      70c9fb57
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 13369e83
      Linus Torvalds authored
      Pull x86 fix from Ingo Molnar:
       "Disable function tracing during early SME setup to fix a boot crash on
        SME-enabled kernels running distro kernels (some of which have
        function tracing enabled)"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mm/mem_encrypt: Disable all instrumentation for early SME setup
      13369e83
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 51987aff
      Linus Torvalds authored
      Pull vfs fixes from Al Viro:
      
       - a couple of ->i_link use-after-free fixes
      
       - regression fix for wrong errno on absent device name in mount(2)
         (this cycle stuff)
      
       - ancient UFS braino in large GID handling on Solaris UFS images (bogus
         cut'n'paste from large UID handling; wrong field checked to decide
         whether we should look at old (16bit) or new (32bit) field)
      
      * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour
        Abort file_remove_privs() for non-reg. files
        [fix] get rid of checking for absent device name in vfs_get_tree()
        apparmorfs: fix use-after-free on symlink traversal
        securityfs: fix use-after-free on symlink traversal
      51987aff
    • Jiri Olsa's avatar
      perf/x86/intel: Fix race in intel_pmu_disable_event() · 6f55967a
      Jiri Olsa authored
      New race in x86_pmu_stop() was introduced by replacing the
      atomic __test_and_clear_bit() of cpuc->active_mask by separate
      test_bit() and __clear_bit() calls in the following commit:
      
        3966c3fe ("x86/perf/amd: Remove need to check "running" bit in NMI handler")
      
      The race causes panic for PEBS events with enabled callchains:
      
        BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
        ...
        RIP: 0010:perf_prepare_sample+0x8c/0x530
        Call Trace:
         <NMI>
         perf_event_output_forward+0x2a/0x80
         __perf_event_overflow+0x51/0xe0
         handle_pmi_common+0x19e/0x240
         intel_pmu_handle_irq+0xad/0x170
         perf_event_nmi_handler+0x2e/0x50
         nmi_handle+0x69/0x110
         default_do_nmi+0x3e/0x100
         do_nmi+0x11a/0x180
         end_repeat_nmi+0x16/0x1a
        RIP: 0010:native_write_msr+0x6/0x20
        ...
         </NMI>
         intel_pmu_disable_event+0x98/0xf0
         x86_pmu_stop+0x6e/0xb0
         x86_pmu_del+0x46/0x140
         event_sched_out.isra.97+0x7e/0x160
        ...
      
      The event is configured to make samples from PEBS drain code,
      but when it's disabled, we'll go through NMI path instead,
      where data->callchain will not get allocated and we'll crash:
      
                x86_pmu_stop
                  test_bit(hwc->idx, cpuc->active_mask)
                  intel_pmu_disable_event(event)
                  {
                    ...
                    intel_pmu_pebs_disable(event);
                    ...
      
      EVENT OVERFLOW ->  <NMI>
                           intel_pmu_handle_irq
                             handle_pmi_common
         TEST PASSES ->        test_bit(bit, cpuc->active_mask))
                                 perf_event_overflow
                                   perf_prepare_sample
                                   {
                                     ...
                                     if (!(sample_type & __PERF_SAMPLE_CALLCHAIN_EARLY))
                                           data->callchain = perf_callchain(event, regs);
      
               CRASH ->              size += data->callchain->nr;
                                   }
                         </NMI>
                    ...
                    x86_pmu_disable_event(event)
                  }
      
                  __clear_bit(hwc->idx, cpuc->active_mask);
      
      Fixing this by disabling the event itself before setting
      off the PEBS bit.
      Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: David Arcari <darcari@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Lendacky Thomas <Thomas.Lendacky@amd.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Fixes: 3966c3fe ("x86/perf/amd: Remove need to check "running" bit in NMI handler")
      Link: http://lkml.kernel.org/r/20190504151556.31031-1-jolsa@kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      6f55967a
  4. 04 May, 2019 1 commit
  5. 03 May, 2019 8 commits
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · aa1be08f
      Linus Torvalds authored
      Pull KVM fixes from Paolo Bonzini:
      
       - PPC and ARM bugfixes from submaintainers
      
       - Fix old Windows versions on AMD (recent regression)
      
       - Fix old Linux versions on processors without EPT
      
       - Fixes for LAPIC timer optimizations
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (21 commits)
        KVM: nVMX: Fix size checks in vmx_set_nested_state
        KVM: selftests: make hyperv_cpuid test pass on AMD
        KVM: lapic: Check for in-kernel LAPIC before deferencing apic pointer
        KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size
        x86/kvm/mmu: reset MMU context when 32-bit guest switches PAE
        KVM: x86: Whitelist port 0x7e for pre-incrementing %rip
        Documentation: kvm: fix dirty log ioctl arch lists
        KVM: VMX: Move RSB stuffing to before the first RET after VM-Exit
        KVM: arm/arm64: Don't emulate virtual timers on userspace ioctls
        kvm: arm: Skip stage2 huge mappings for unaligned ipa backed by THP
        KVM: arm/arm64: Ensure vcpu target is unset on reset failure
        KVM: lapic: Convert guest TSC to host time domain if necessary
        KVM: lapic: Allow user to disable adaptive tuning of timer advancement
        KVM: lapic: Track lapic timer advance per vCPU
        KVM: lapic: Disable timer advancement if adaptive tuning goes haywire
        x86: kvm: hyper-v: deal with buggy TLB flush requests from WS2012
        KVM: x86: Consider LAPIC TSC-Deadline timer expired if deadline too short
        KVM: PPC: Book3S: Protect memslots while validating user address
        KVM: PPC: Book3S HV: Perserve PSSCR FAKE_SUSPEND bit on guest exit
        KVM: arm/arm64: vgic-v3: Retire pending interrupts on disabling LPIs
        ...
      aa1be08f
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current-fixed' of... · 82463436
      Linus Torvalds authored
      Merge branch 'i2c/for-current-fixed' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/wsa/linux
      
      Pull i2c fixes from Wolfram Sang:
       "I2C driver bugfixes and a MAINTAINERS update for you"
      
      * 'i2c/for-current-fixed' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: Prevent runtime suspend of adapter when Host Notify is required
        i2c: synquacer: fix enumeration of slave devices
        MAINTAINERS: friendly takeover of i2c-gpio driver
        i2c: designware: ratelimit 'transfer when suspended' errors
        i2c: imx: correct the method of getting private data in notifier_call
      82463436
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-2019-05-03' of git://anongit.freedesktop.org/drm/drm · a4ccb5f9
      Linus Torvalds authored
      Pull drm fix from Dave Airlie:
       "Just a single qxl revert"
      
      * tag 'drm-fixes-2019-05-03' of git://anongit.freedesktop.org/drm/drm:
        Revert "drm/qxl: drop prime import/export callbacks"
      a4ccb5f9
    • Linus Torvalds's avatar
      Merge tag 'clk-fixes-for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/clk/linux · 8f76216c
      Linus Torvalds authored
      Pull clk fixes from Stephen Boyd:
       "Two fixes for the NKMP clks on Allwinner SoCs, a locking fix for
        clkdev where we forgot to hold a lock while iterating a list that can
        change, and finally a build fix that adds some stubs for clk APIs that
        are used by devfreq drivers on platforms without the clk APIs"
      
      * tag 'clk-fixes-for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/clk/linux:
        clk: Add missing stubs for a few functions
        clkdev: Hold clocks_mutex while iterating clocks list
        clk: sunxi-ng: nkmp: Explain why zero width check is needed
        clk: sunxi-ng: nkmp: Avoid GENMASK(-1, 0)
      8f76216c
    • Linus Torvalds's avatar
      Merge tag 'sound-5.1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 46572f78
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "A few stable fixes at this round.
      
        The USB Line6 audio fixes are a bit large, but they are rather trivial
        and pretty much device-specific, so should be safe to apply at this
        late stage. Ditto for other HD-audio quirks"
      
      * tag 'sound-5.1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda/realtek - Apply the fixup for ASUS Q325UAR
        ALSA: line6: use dynamic buffers
        ALSA: hda/realtek - Fixed Dell AIO speaker noise
        ALSA: hda/realtek - Add new Dell platform for headset mode
      46572f78
    • Alexander Shishkin's avatar
      perf/x86/intel/pt: Remove software double buffering PMU capability · 72e830f6
      Alexander Shishkin authored
      Now that all AUX allocations are high-order by default, the software
      double buffering PMU capability doesn't make sense any more, get rid
      of it. In case some PMUs choose to opt out, we can re-introduce it.
      Signed-off-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
      Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Cc: adrian.hunter@intel.com
      Link: http://lkml.kernel.org/r/20190503085536.24119-3-alexander.shishkin@linux.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      72e830f6
    • Alexander Shishkin's avatar
      perf/ring_buffer: Fix AUX software double buffering · 26ae4f44
      Alexander Shishkin authored
      This recent commit:
      
        5768402f ("perf/ring_buffer: Use high order allocations for AUX buffers optimistically")
      
      overlooked the fact that the previous one page granularity of the AUX buffer
      provided an implicit double buffering capability to the PMU driver, which
      went away when the entire buffer became one high-order page.
      
      Always make the full-trace mode AUX allocation at least two-part to preserve
      the previous behavior and allow the implicit double buffering to continue.
      Reported-by: default avatarAmmy Yi <ammy.yi@intel.com>
      Signed-off-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
      Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Cc: adrian.hunter@intel.com
      Fixes: 5768402f ("perf/ring_buffer: Use high order allocations for AUX buffers optimistically")
      Link: http://lkml.kernel.org/r/20190503085536.24119-2-alexander.shishkin@linux.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      26ae4f44
    • Ingo Molnar's avatar
      Merge tag 'perf-urgent-for-mingo-5.1-20190502' of... · 221856b1
      Ingo Molnar authored
      Merge tag 'perf-urgent-for-mingo-5.1-20190502' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
      
      Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
      
      tools UAPI:
      
        Arnaldo Carvalho de Melo:
      
        - Sync x86's vmx.h with the kernel.
      
        - Copy missing unistd.h headers for arc, hexagon and riscv, fixing
          a reported build regression on the ARC 32-bit architecture.
      
      perf bench numa:
      
        Arnaldo Carvalho de Melo:
      
        - Add define for RUSAGE_THREAD if not present, fixing the build on the
          ARC architecture when only zlib and libnuma are present.
      
      perf BPF:
      
        Arnaldo Carvalho de Melo:
      
        - The disassembler-four-args feature test needs -ldl on distros such as
          Mageia 7.
      
        Bo YU:
      
        - Fix unlocking on success in perf_env__find_btf(), detected with
          the coverity tool.
      
      libtraceevent:
      
        Leo Yan:
      
        - Change misleading hard coded 'trace-cmd' string in error messages.
      
      ARM hardware tracing:
      
        Leo Yan:
      
        - Always allocate memory for cs_etm_queue::prev_packet, fixing a segfault
          when processing CoreSight perf data.
      
      perf annotate:
      
        Thadeu Lima de Souza Cascardo:
      
        - Fix build on 32 bit for BPF.
      
      perf report:
      
        Thomas Richter:
      
        - Report OOM in status line in the GTK UI.
      
      core libs:
      
        - Remove needless asm/unistd.h that, used with sys/syscall.h ended
          up redefining the syscalls defines in environments such as the
          ARC arch when using uClibc.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      221856b1
  6. 02 May, 2019 6 commits