1. 28 Aug, 2020 2 commits
  2. 27 Aug, 2020 4 commits
  3. 26 Aug, 2020 23 commits
  4. 25 Aug, 2020 3 commits
    • Tomi Valkeinen's avatar
      drm/omap: fix incorrect lock state · 7fd5b254
      Tomi Valkeinen authored
      After commit 92cc68e3 ("drm/vblank: Use
      spin_(un)lock_irq() in drm_crtc_vblank_on()") omapdrm locking is broken:
      
      WARNING: inconsistent lock state
      5.8.0-rc2-00483-g92cc68e3 #13 Tainted: G        W
      --------------------------------
      inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
      swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
      ea98222c (&dev->event_lock#2){?.+.}-{2:2}, at: drm_handle_vblank+0x4c/0x520 [drm]
      {HARDIRQ-ON-W} state was registered at:
        trace_hardirqs_on+0x9c/0x1ec
        _raw_spin_unlock_irq+0x20/0x58
        omap_crtc_atomic_enable+0x54/0xa0 [omapdrm]
        drm_atomic_helper_commit_modeset_enables+0x218/0x270 [drm_kms_helper]
        omap_atomic_commit_tail+0x48/0xc4 [omapdrm]
        commit_tail+0x9c/0x190 [drm_kms_helper]
        drm_atomic_helper_commit+0x154/0x188 [drm_kms_helper]
        drm_client_modeset_commit_atomic+0x228/0x268 [drm]
        drm_client_modeset_commit_locked+0x60/0x1d0 [drm]
        drm_client_modeset_commit+0x24/0x40 [drm]
        drm_fb_helper_restore_fbdev_mode_unlocked+0x54/0xa8 [drm_kms_helper]
        drm_fb_helper_set_par+0x2c/0x5c [drm_kms_helper]
        drm_fb_helper_hotplug_event.part.0+0xa0/0xbc [drm_kms_helper]
        drm_kms_helper_hotplug_event+0x24/0x30 [drm_kms_helper]
        output_poll_execute+0x1a8/0x1c0 [drm_kms_helper]
        process_one_work+0x268/0x800
        worker_thread+0x30/0x4e0
        kthread+0x164/0x190
        ret_from_fork+0x14/0x20
      
      The reason for this is that omapdrm calls drm_crtc_vblank_on() while
      holding event_lock taken with spin_lock_irq().
      
      It is not clear why drm_crtc_vblank_on() and drm_crtc_vblank_get() are
      called while holding event_lock. I don't see any problem with moving
      those calls outside the lock, which is what this patch does.
      Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200819103021.440288-1-tomi.valkeinen@ti.comReviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
      7fd5b254
    • Maarten Lankhorst's avatar
      Merge tag 'v5.9-rc2' into drm-misc-fixes · 2d9ad4cf
      Maarten Lankhorst authored
      Backmerge requested by Tomi for a fix to omap inconsistent
      locking state issue, and because we need at least v5.9-rc2 now.
      Signed-off-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
      2d9ad4cf
    • Mika Kuoppala's avatar
      drm/i915: Fix cmd parser desc matching with masks · e5f10d63
      Mika Kuoppala authored
      Our variety of defined gpu commands have the actual
      command id field and possibly length and flags applied.
      
      We did start to apply the mask during initialization of
      the cmd descriptors but forgot to also apply it on comparisons.
      
      Fix comparisons in order to properly deny access with
      associated commands.
      
      v2: fix lri with correct mask (Chris)
      
      References: 926abff2 ("drm/i915/cmdparser: Ignore Length operands during command matching")
      Reported-by: default avatarNicolai Stange <nstange@suse.de>
      Cc: stable@vger.kernel.org # v5.4+
      Cc: Miroslav Benes <mbenes@suse.cz>
      Cc: Takashi Iwai <tiwai@suse.de>
      Cc: Tyler Hicks <tyhicks@canonical.com>
      Cc: Jon Bloomfield <jon.bloomfield@intel.com>
      Cc: Chris Wilson <chris.p.wilson@intel.com>
      Signed-off-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
      Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200817195926.12671-1-mika.kuoppala@linux.intel.com
      (cherry picked from commit 3b4efa14)
      Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
      e5f10d63
  5. 24 Aug, 2020 2 commits
  6. 23 Aug, 2020 6 commits
    • Linus Torvalds's avatar
      Linux 5.9-rc2 · d012a719
      Linus Torvalds authored
      d012a719
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · cb957121
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
      
       - Add perf support for emitting extended registers for power10.
      
       - A fix for CPU hotplug on pseries, where on large/loaded systems we
         may not wait long enough for the CPU to be offlined, leading to
         crashes.
      
       - Addition of a raw cputable entry for Power10, which is not required
         to boot, but is required to make our PMU setup work correctly in
         guests.
      
       - Three fixes for the recent changes on 32-bit Book3S to move modules
         into their own segment for strict RWX.
      
       - A fix for a recent change in our powernv PCI code that could lead to
         crashes.
      
       - A change to our perf interrupt accounting to avoid soft lockups when
         using some events, found by syzkaller.
      
       - A change in the way we handle power loss events from the hypervisor
         on pseries. We no longer immediately shut down if we're told we're
         running on a UPS.
      
       - A few other minor fixes.
      
      Thanks to Alexey Kardashevskiy, Andreas Schwab, Aneesh Kumar K.V, Anju T
      Sudhakar, Athira Rajeev, Christophe Leroy, Frederic Barrat, Greg Kurz,
      Kajol Jain, Madhavan Srinivasan, Michael Neuling, Michael Roth,
      Nageswara R Sastry, Oliver O'Halloran, Thiago Jung Bauermann,
      Vaidyanathan Srinivasan, Vasant Hegde.
      
      * tag 'powerpc-5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/perf/hv-24x7: Move cpumask file to top folder of hv-24x7 driver
        powerpc/32s: Fix module loading failure when VMALLOC_END is over 0xf0000000
        powerpc/pseries: Do not initiate shutdown when system is running on UPS
        powerpc/perf: Fix soft lockups due to missed interrupt accounting
        powerpc/powernv/pci: Fix possible crash when releasing DMA resources
        powerpc/pseries/hotplug-cpu: wait indefinitely for vCPU death
        powerpc/32s: Fix is_module_segment() when MODULES_VADDR is defined
        powerpc/kasan: Fix KASAN_SHADOW_START on BOOK3S_32
        powerpc/fixmap: Fix the size of the early debug area
        powerpc/pkeys: Fix build error with PPC_MEM_KEYS disabled
        powerpc/kernel: Cleanup machine check function declarations
        powerpc: Add POWER10 raw mode cputable entry
        powerpc/perf: Add extended regs support for power10 platform
        powerpc/perf: Add support for outputting extended regs in perf intr_regs
        powerpc: Fix P10 PVR revision in /proc/cpuinfo for SMT4 cores
      cb957121
    • Linus Torvalds's avatar
      Merge tag 'x86-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 550c2129
      Linus Torvalds authored
      Pull x86 fix from Thomas Gleixner:
       "A single fix for x86 which removes the RDPID usage from the paranoid
        entry path and unconditionally uses LSL to retrieve the CPU number.
      
        RDPID depends on MSR_TSX_AUX. KVM has an optmization to avoid
        expensive MRS read/writes on VMENTER/EXIT. It caches the MSR values
        and restores them either when leaving the run loop, on preemption or
        when going out to user space. MSR_TSX_AUX is part of that lazy MSR
        set, so after writing the guest value and before the lazy restore any
        exception using the paranoid entry will read the guest value and use
        it as CPU number to retrieve the GSBASE value for the current CPU when
        FSGSBASE is enabled. As RDPID is only used in that particular entry
        path, there is no reason to burden VMENTER/EXIT with two extra MSR
        writes. Remove the RDPID optimization, which is not even backed by
        numbers from the paranoid entry path instead"
      
      * tag 'x86-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/entry/64: Do not use RDPID in paranoid entry to accomodate KVM
      550c2129
    • Linus Torvalds's avatar
      Merge tag 'perf-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · cea05c19
      Linus Torvalds authored
      Pull x86 perf fix from Thomas Gleixner:
       "A single update for perf on x86 which has support for the broken down
        bandwith counters"
      
      * tag 'perf-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/intel/uncore: Add BW counters for GT, IA and IO breakdown
      cea05c19
    • Linus Torvalds's avatar
      Merge tag 'efi-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 10c091b6
      Linus Torvalds authored
      Pull EFI fixes from Thomas Gleixner:
      
       - Enforce NX on RO data in mixed EFI mode
      
       - Destroy workqueue in an error handling path to prevent UAF
      
       - Stop argument parser at '--' which is the delimiter for init
      
       - Treat a NULL command line pointer as empty instead of dereferncing it
         unconditionally.
      
       - Handle an unterminated command line correctly
      
       - Cleanup the 32bit code leftovers and remove obsolete documentation
      
      * tag 'efi-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        Documentation: efi: remove description of efi=old_map
        efi/x86: Move 32-bit code into efi_32.c
        efi/libstub: Handle unterminated cmdline
        efi/libstub: Handle NULL cmdline
        efi/libstub: Stop parsing arguments at "--"
        efi: add missed destroy_workqueue when efisubsys_init fails
        efi/x86: Mark kernel rodata non-executable for mixed mode
      10c091b6
    • Linus Torvalds's avatar
      Merge tag 'core-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e99b2507
      Linus Torvalds authored
      Pull entry fix from Thomas Gleixner:
       "A single bug fix for the common entry code.
      
        The transcription of the x86 version messed up the reload of the
        syscall number from pt_regs after ptrace and seccomp which breaks
        syscall number rewriting"
      
      * tag 'core-urgent-2020-08-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        core/entry: Respect syscall number rewrites
      e99b2507