1. 07 Sep, 2024 4 commits
  2. 06 Sep, 2024 20 commits
    • Linus Torvalds's avatar
      KVM: x86: don't fall through case statements without annotations · 9d4c3040
      Linus Torvalds authored
      clang warns on this because it has an unannotated fall-through between
      cases:
      
         arch/x86/kvm/x86.c:4819:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
      
      and while we could annotate it as a fallthrough, the proper fix is to
      just add the break for this case, instead of falling through to the
      default case and the break there.
      
      gcc also has that warning, but it looks like gcc only warns for the
      cases where they fall through to "real code", rather than to just a
      break.  Odd.
      
      Fixes: d30d9ee9 ("KVM: x86: Only advertise KVM_CAP_READONLY_MEM when supported by VM")
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Tom Dohrmann <erbse.13@gmx.de>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9d4c3040
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 6b8ff511
      Linus Torvalds authored
      Pull arm64 fix from Catalin Marinas:
       "Fix the arm64 usage of ftrace_graph_ret_addr() to pass the
        &state->graph_idx pointer instead of NULL, otherwise this function
        just returns early"
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: stacktrace: fix the usage of ftrace_graph_ret_addr()
      6b8ff511
    • Linus Torvalds's avatar
      Merge tag 'riscv-for-linus-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux · 890daede
      Linus Torvalds authored
      Pull RISC-V fixes from Palmer Dabbelt:
      
       - A revert for the mmap() change that ties the allocation range to the
         hint adress, as what we tried to do ended up regressing on other
         userspace workloads.
      
       - A fix to avoid a kernel memory leak when emulating misaligned
         accesses from userspace.
      
       - A Kconfig fix for toolchain vector detection, which now correctly
         detects vector support on toolchains where the V extension depends on
         the M extension.
      
       - A fix to avoid failing the linear mapping bootmem bounds check on
         NOMMU systems.
      
       - A fix for early alternatives on relocatable kernels.
      
      * tag 'riscv-for-linus-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
        riscv: Fix RISCV_ALTERNATIVE_EARLY
        riscv: Do not restrict memory size because of linear mapping on nommu
        riscv: Fix toolchain vector detection
        riscv: misaligned: Restrict user access to kernel memory
        riscv: mm: Do not restrict mmap address based on hint
        riscv: selftests: Remove mmap hint address checks
        Revert "RISC-V: mm: Document mmap changes"
      890daede
    • Linus Torvalds's avatar
      Merge tag 'powerpc-6.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · a78d7dce
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
      
       - Fix a deadlock in the powerpc qspinlock MCS queue logic
      
       - Fix the return type of pgd_val() to not truncate 64-bit PTEs on 85xx
      
       - Allow the check for dynamic relocations in the VDSO to work correctly
      
       - Make mmu_pte_psize static to fix a build error
      
      Thanks to Christophe Leroy, Nysal Jan K.A., Nicholas Piggin, Geetika
      Moolchandani, Jijo Varghese, and Vaishnavi Bhat.
      
      * tag 'powerpc-6.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/qspinlock: Fix deadlock in MCS queue
        powerpc/mm: Fix return type of pgd_val()
        powerpc/vdso: Don't discard rela sections
        powerpc/64e: Define mmu_pte_psize static
      a78d7dce
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · d45111e5
      Linus Torvalds authored
      Pull x86 kvm fixes from Paolo Bonzini:
       "Many small fixes that accumulated while I was on vacation...
      
         - Fixup missed comments from the REMOVED_SPTE => FROZEN_SPTE rename
      
         - Ensure a root is successfully loaded when pre-faulting SPTEs
      
         - Grab kvm->srcu when handling KVM_SET_VCPU_EVENTS to guard against
           accessing memslots if toggling SMM happens to force a VM-Exit
      
         - Emulate MSR_{FS,GS}_BASE on SVM even though interception is always
           disabled, so that KVM does the right thing if KVM's emulator
           encounters {RD,WR}MSR
      
         - Explicitly clear BUS_LOCK_DETECT from KVM's caps on AMD, as KVM
           doesn't yet virtualize BUS_LOCK_DETECT on AMD
      
         - Cleanup the help message for CONFIG_KVM_AMD_SEV, and call out that
           KVM now supports SEV-SNP too
      
         - Specialize return value of
           KVM_CHECK_EXTENSION(KVM_CAP_READONLY_MEM), based on VM type
      
         - Remove unnecessary dependency on CONFIG_HIGH_RES_TIMERS
      
         - Note an RCU quiescent state on guest exit. This avoids a call to
           rcu_core() if there was a grace period request while guest was
           running"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: Remove HIGH_RES_TIMERS dependency
        kvm: Note an RCU quiescent state on guest exit
        KVM: x86: Only advertise KVM_CAP_READONLY_MEM when supported by VM
        KVM: SEV: Update KVM_AMD_SEV Kconfig entry and mention SEV-SNP
        KVM: SVM: Don't advertise Bus Lock Detect to guest if SVM support is missing
        KVM: SVM: fix emulation of msr reads/writes of MSR_FS_BASE and MSR_GS_BASE
        KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS
        KVM: x86/mmu: Check that root is valid/loaded when pre-faulting SPTEs
        KVM: x86/mmu: Fixup comments missed by the REMOVED_SPTE=>FROZEN_SPTE rename
      d45111e5
    • Linus Torvalds's avatar
      Merge tag 'pm-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 788220ee
      Linus Torvalds authored
      Pull power management fix from Rafael Wysocki:
       "Fix an incorrect warning emitted by the amd-pstate driver on
        processors that don't support X86_FEATURE_CPPC (Gautham Shenoy)"
      
      * tag 'pm-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        cpufreq/amd-pstate: Remove warning for X86_FEATURE_CPPC on certain Zen models
      788220ee
    • Linus Torvalds's avatar
      Merge tag 'block-6.11-20240906' of git://git.kernel.dk/linux · b66f0b11
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Mostly just some fixlets for NVMe, but also a bug fix for the ublk
        driver and an integrity fix"
      
      * tag 'block-6.11-20240906' of git://git.kernel.dk/linux:
        bio-integrity: don't restrict the size of integrity metadata
        ublk_drv: fix NULL pointer dereference in ublk_ctrl_start_recovery()
        nvmet: Identify-Active Namespace ID List command should reject invalid nsid
        nvme: set BLK_FEAT_ZONED for ZNS multipath disks
        nvme-pci: Add sleep quirk for Samsung 990 Evo
        nvme-pci: allocate tagset on reset if necessary
        nvmet-tcp: fix kernel crash if commands allocation fails
        nvme: use better description for async reset reason
        nvmet: Make nvmet_debugfs static
      b66f0b11
    • Linus Torvalds's avatar
      Merge tag 'sound-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 703896be
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Hopefully the last PR for 6.11, at least for this level of amount.
      
        In addition to the usual HD-audio quirks, there are more changes in
        ASoC, but all look small and device-specific fixes, and nothing stands
        out. The only slightly big change is sunxi I2S fix, which looks quite
        safe to apply, too"
      
      * tag 'sound-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (21 commits)
        ALSA: hda/realtek - Fix inactive headset mic jack for ASUS Vivobook 15 X1504VAP
        ALSA: hda/realtek: Support mute LED on HP Laptop 14-dq2xxx
        ALSA: hda/realtek: Enable Mute Led for HP Victus 15-fb1xxx
        ALSA: hda/realtek: extend quirks for Clevo V5[46]0
        ASoC: codecs: lpass-va-macro: set the default codec version for sm8250
        ALSA: hda: add HDMI codec ID for Intel PTL
        ALSA: hda/realtek: add patch for internal mic in Lenovo V145
        ASoC: sunxi: sun4i-i2s: fix LRCLK polarity in i2s mode
        ASoC: amd: yc: Add a quirk for MSI Bravo 17 (D7VEK)
        ASoC: mediatek: mt8188-mt6359: Modify key
        ASoc: SOF: topology: Clear SOF link platform name upon unload
        ALSA: hda/conexant: Add pincfg quirk to enable top speakers on Sirius devices
        ASoC: SOF: ipc: replace "enum sof_comp_type" field with "uint32_t"
        ASoC: fix module autoloading
        ASoC: tda7419: fix module autoloading
        ASoC: google: fix module autoloading
        ASoC: intel: fix module autoloading
        ASoC: tegra: Fix CBB error during probe()
        ASoC: dapm: Fix UAF for snd_soc_pcm_runtime object
        ASoC: Intel: soc-acpi-cht: Make Lenovo Yoga Tab 3 X90F DMI match less strict
        ...
      703896be
    • Linus Torvalds's avatar
      Merge tag 'mmc-v6.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc · c3af2256
      Linus Torvalds authored
      Pull MMC fixes from Ulf Hansson:
       "MMC core:
         - Apply SD quirks earlier during probe so they become relevant
      
        MMC host:
         - cqhci: Fix checking of CQHCI_HALT state
         - dw_mmc: Fix IDMAC operation with pages bigger than 4K
         - sdhci-of-aspeed: Fix module autoloading"
      
      * tag 'mmc-v6.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
        mmc: cqhci: Fix checking of CQHCI_HALT state
        mmc: dw_mmc: Fix IDMAC operation with pages bigger than 4K
        mmc: sdhci-of-aspeed: fix module autoloading
        mmc: core: apply SD quirks earlier during probe
      c3af2256
    • Linus Torvalds's avatar
      Merge tag 'gpio-fixes-for-v6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux · 0de82f0d
      Linus Torvalds authored
      Pull gpio fixes from Bartosz Golaszewski:
      
       - fix an OF node reference leak in gpio-rockchip
      
       - add the missing module device table to gpio-modepin
      
      * tag 'gpio-fixes-for-v6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
        gpio: modepin: Enable module autoloading
        gpio: rockchip: fix OF node leak in probe()
      0de82f0d
    • Linus Torvalds's avatar
      Merge tag 'pmdomain-v6.11-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm · 2125a725
      Linus Torvalds authored
      Pull pmdomain fix from Ulf Hansson:
      
       - Fix support for required OPPs for multiple PM domains
      
      * tag 'pmdomain-v6.11-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm:
        OPP: Fix support for required OPPs for multiple PM domains
      2125a725
    • Linus Torvalds's avatar
      Merge tag 'pwm/for-6.11-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux · 8654fa5c
      Linus Torvalds authored
      Pull pwm fix from Uwe Kleine-König:
       "Fix an off-by-one in the stm32 driver.
      
        Hardware engineers tend to start counting at 1 while the software guys
        usually start with 0. This isn't so nice because that results in
        drivers where pwm device #2 needs to use the hardware registers with
        index 3.
      
        This was noticed by Fabrice Gasnier.
      
        A small patch fixing that mismatch is the only change included here"
      
      * tag 'pwm/for-6.11-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux:
        pwm: stm32: Use the right CCxNP bit in stm32_pwm_enable()
      8654fa5c
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-2024-09-06' of https://gitlab.freedesktop.org/drm/kernel · ea462f0f
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "This has a fair few patches in it, but I reviewed them all and they
        seem like real things, amdgpu, i915 and xe each have a bunch of fixes
        for various things, then there is a some bridge suspend/resume
        ordering fixes for a recent rework, and then some single driver
        changes in a few others.
      
        Nothing looks too serious, hopefully next week is quiet.
      
        amdgpu:
         - IPS workaround
         - Fix compatibility with older MES firmware
         - Fix CPU spikes when clearing VRAM
         - Backlight fix
         - PMO fix
         - Revert SWSMU change to fix regression
      
        xe:
         - GSC loading fix
         - PCODE mutex fix
         - Suspend/Resume fixes
         - RPM fixes
      
        i915:
         - Do not attempt to load the GSC multiple times
         - Fix readout degamma_lut mismatch on ilk/snb
         - Mark debug_fence_init_onstack() with __maybe_unused
         - fence: Mark debug_fence_free() with __maybe_unused
         - display: Add mechanism to use sink model when applying quirk
         - display: Increase Fast Wake Sync length as a quirk
      
        komeda:
         - zpos normalization fix
      
        nouveau:
         - incorrect register fix
      
        imagination:
         - memory leak fix
      
        bridge:
         - hdmi/bridge rework fixes
      
        panthor:
         - cache coherency fix
         - hi priority access fix
      
        panel:
         - change of compatible string
      
        fbdev:
         - deferred-io init with no struct page fix"
      
      * tag 'drm-fixes-2024-09-06' of https://gitlab.freedesktop.org/drm/kernel: (29 commits)
        Revert "drm/amdgpu: align pp_power_profile_mode with kernel docs"
        drm/fbdev-dma: Only install deferred I/O if necessary
        drm/panthor: flush FW AS caches in slow reset path
        drm: panel: nv3052c: Correct WL-355608-A8 panel compatible
        dt-bindings: display: panel: Rename WL-355608-A8 panel to rg35xx-*-panel
        drm/panthor: Restrict high priorities on group_create
        drm/xe/display: Avoid encoder_suspend at runtime suspend
        drm/xe: Suspend/resume user access only during system s/r
        drm/xe/display: Match i915 driver suspend/resume sequences better
        drm/xe: Add missing runtime reference to wedged upon gt_reset
        drm/xe/pcode: Treat pcode as per-tile rather than per-GT
        drm/xe/gsc: Do not attempt to load the GSC multiple times
        drm/bridge-connector: reset the HDMI connector state
        drm/bridge-connector: move to DRM_DISPLAY_HELPER module
        drm/display: stop depending on DRM_DISPLAY_HELPER
        drm/i915/display: Increase Fast Wake Sync length as a quirk
        drm/i915/display: Add mechanism to use sink model when applying quirk
        drm/amd/display: Block timing sync for different signals in PMO
        drm/amd/display: Lock DC and exit IPS when changing backlight
        drm/amdgpu: always allocate cleared VRAM for GEM allocations
        ...
      ea462f0f
    • Christian Brauner's avatar
      libfs: fix get_stashed_dentry() · 4e32c25b
      Christian Brauner authored
      get_stashed_dentry() tries to optimistically retrieve a stashed dentry
      from a provided location.  It needs to ensure to hold rcu lock before it
      dereference the stashed location to prevent UAF issues.  Use
      rcu_dereference() instead of READ_ONCE() it's effectively equivalent
      with some lockdep bells and whistles and it communicates clearly that
      this expects rcu protection.
      
      Link: https://lore.kernel.org/r/20240906-vfs-hotfix-5959800ffa68@brauner
      Fixes: 07fd7c32 ("libfs: add path_from_stashed()")
      Reported-by: syzbot+f82b36bffae7ef78b6a7@syzkaller.appspotmail.com
      Fixes: syzbot+f82b36bffae7ef78b6a7@syzkaller.appspotmail.com
      Reported-by: syzbot+cbe4b96e1194b0e34db6@syzkaller.appspotmail.com
      Fixes: syzbot+cbe4b96e1194b0e34db6@syzkaller.appspotmail.com
      Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4e32c25b
    • Takashi Iwai's avatar
      Merge tag 'asoc-fix-v6.11-rc6' of... · c491b044
      Takashi Iwai authored
      Merge tag 'asoc-fix-v6.11-rc6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
      
      ASoC: Fixes for v6.11
      
      A larger set of fixes than I'd like at this point, but mainly due to
      people working on fixing module autoloading by adding missing exports of
      ID tables rather than anything particularly concerning.  There are some
      other runtime fixes and quirks, and a tweak to the ABI definition for
      SOF which ensures that a struct layout doesn't vary depending on the
      architecture of the host.
      c491b044
    • Linus Torvalds's avatar
      Merge tag 'bpf-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf · b831f83e
      Linus Torvalds authored
      Pull bpf fixes from Alexei Starovoitov:
      
       - Fix crash when btf_parse_base() returns an error (Martin Lau)
      
       - Fix out of bounds access in btf_name_valid_section() (Jeongjun Park)
      
      * tag 'bpf-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
        selftests/bpf: Add a selftest to check for incorrect names
        bpf: add check for invalid name in btf_name_valid_section()
        bpf: Fix a crash when btf_parse_base() returns an error pointer
      b831f83e
    • Dave Airlie's avatar
      Merge tag 'amd-drm-fixes-6.11-2024-09-05' of... · 141bb6bc
      Dave Airlie authored
      Merge tag 'amd-drm-fixes-6.11-2024-09-05' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes
      
      amd-drm-fixes-6.11-2024-09-05:
      
      amdgpu:
      - IPS workaround
      - Fix compatibility with older MES firmware
      - Fix CPU spikes when clearing VRAM
      - Backlight fix
      - PMO fix
      - Revert SWSMU change to fix regression
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      
      From: Alex Deucher <alexander.deucher@amd.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20240905190533.854116-1-alexander.deucher@amd.com
      141bb6bc
    • Dave Airlie's avatar
      Merge tag 'drm-misc-fixes-2024-09-05' of... · ca10367a
      Dave Airlie authored
      Merge tag 'drm-misc-fixes-2024-09-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes
      
      A zpos normalization fix for komeda, a register bitmask fix for nouveau,
      a memory leak fix for imagination, three fixes for the recent bridge
      HDMI work, a potential DoS fix and a cache coherency for panthor, a
      change of panel compatible and a deferred-io fix when used with
      non-highmem memory.
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      
      From: Maxime Ripard <mripard@redhat.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20240905-original-radical-guan-e7a2ae@houat
      ca10367a
    • Dave Airlie's avatar
      Merge tag 'drm-xe-fixes-2024-09-05' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes · 4de4a0f1
      Dave Airlie authored
      - GSC loading fix (Daniele)
      - PCODE mutex fix (Matt)
      - Suspend/Resume fixes (Maarten, Imre)
      - RPM fixes (Rodrigo)
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      
      From: Rodrigo Vivi <rodrigo.vivi@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/ZtmyFvDfFLPbuf6A@intel.com
      4de4a0f1
    • Linus Torvalds's avatar
      Merge tag 'net-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · d759ee24
      Linus Torvalds authored
      Pull networking fixes from Jakub Kicinski:
       "Including fixes from can, bluetooth and wireless.
      
        No known regressions at this point. Another calm week, but chances are
        that has more to do with vacation season than the quality of our work.
      
        Current release - new code bugs:
      
         - smc: prevent NULL pointer dereference in txopt_get
      
         - eth: ti: am65-cpsw: number of XDP-related fixes
      
        Previous releases - regressions:
      
         - Revert "Bluetooth: MGMT/SMP: Fix address type when using SMP over
           BREDR/LE", it breaks existing user space
      
         - Bluetooth: qca: if memdump doesn't work, re-enable IBS to avoid
           later problems with suspend
      
         - can: mcp251x: fix deadlock if an interrupt occurs during
           mcp251x_open
      
         - eth: r8152: fix the firmware communication error due to use of bulk
           write
      
         - ptp: ocp: fix serial port information export
      
         - eth: igb: fix not clearing TimeSync interrupts for 82580
      
         - Revert "wifi: ath11k: support hibernation", fix suspend on Lenovo
      
        Previous releases - always broken:
      
         - eth: intel: fix crashes and bugs when reconfiguration and resets
           happening in parallel
      
         - wifi: ath11k: fix NULL dereference in ath11k_mac_get_eirp_power()
      
        Misc:
      
         - docs: netdev: document guidance on cleanup.h"
      
      * tag 'net-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (61 commits)
        ila: call nf_unregister_net_hooks() sooner
        tools/net/ynl: fix cli.py --subscribe feature
        MAINTAINERS: fix ptp ocp driver maintainers address
        selftests: net: enable bind tests
        net: dsa: vsc73xx: fix possible subblocks range of CAPT block
        sched: sch_cake: fix bulk flow accounting logic for host fairness
        docs: netdev: document guidance on cleanup.h
        net: xilinx: axienet: Fix race in axienet_stop
        net: bridge: br_fdb_external_learn_add(): always set EXT_LEARN
        r8152: fix the firmware doesn't work
        fou: Fix null-ptr-deref in GRO.
        bareudp: Fix device stats updates.
        net: mana: Fix error handling in mana_create_txq/rxq's NAPI cleanup
        bpf, net: Fix a potential race in do_sock_getsockopt()
        net: dqs: Do not use extern for unused dql_group
        sch/netem: fix use after free in netem_dequeue
        usbnet: modern method to get random MAC
        MAINTAINERS: wifi: cw1200: add net-cw1200.h
        ice: do not bring the VSI up, if it was down before the XDP setup
        ice: remove ICE_CFG_BUSY locking from AF_XDP code
        ...
      d759ee24
  3. 05 Sep, 2024 16 commits
    • Linus Torvalds's avatar
      Merge tag 'spi-fix-v6.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi · f9535999
      Linus Torvalds authored
      Pull spi fixes from Mark Brown:
       "A few small driver specific fixes (including some of the widespread
        work on fixing missing ID tables for module autoloading and the revert
        of some problematic PM work in spi-rockchip), some improvements to the
        MAINTAINERS information for the NXP drivers and the addition of a new
        device ID to spidev"
      
      * tag 'spi-fix-v6.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
        MAINTAINERS: SPI: Add mailing list imx@lists.linux.dev for nxp spi drivers
        MAINTAINERS: SPI: Add freescale lpspi maintainer information
        spi: spi-fsl-lpspi: Fix off-by-one in prescale max
        spi: spidev: Add missing spi_device_id for jg10309-01
        spi: bcm63xx: Enable module autoloading
        spi: intel: Add check devm_kasprintf() returned value
        spi: spidev: Add an entry for elgin,jg10309-01
        spi: rockchip: Resolve unbalanced runtime PM / system PM handling
      f9535999
    • Dave Airlie's avatar
      Merge tag 'drm-intel-fixes-2024-09-05' of... · f2064ae3
      Dave Airlie authored
      Merge tag 'drm-intel-fixes-2024-09-05' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-fixes
      
      - drm/i915: Do not attempt to load the GSC multiple times (Daniele Ceraolo Spurio)
      - drm/i915: Fix readout degamma_lut mismatch on ilk/snb (Ville Syrjälä)
      - drm/i915/fence: Mark debug_fence_init_onstack() with __maybe_unused (Andy Shevchenko)
      - drm/i915/fence: Mark debug_fence_free() with __maybe_unused (Andy Shevchenko)
      - drm/i915/display: Add mechanism to use sink model when applying quirk [display] (Jouni Högander)
      - drm/i915/display: Increase Fast Wake Sync length as a quirk [display] (Jouni Högander)
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      From: Tvrtko Ursulin <tursulin@igalia.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/Ztlo2hVO4SBvfAnq@linux
      f2064ae3
    • Linus Torvalds's avatar
      Merge tag 'regulator-fix-v6.11-stub' of... · 2a660447
      Linus Torvalds authored
      Merge tag 'regulator-fix-v6.11-stub' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
      
      Pull regulator fix from Mark Brown:
       "A fix from Doug Anderson for a missing stub, required to fix the build
        for some newly added users of devm_regulator_bulk_get_const() in
        !REGULATOR configurations"
      
      * tag 'regulator-fix-v6.11-stub' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
        regulator: core: Stub devm_regulator_bulk_get_const() if !CONFIG_REGULATOR
      2a660447
    • Linus Torvalds's avatar
      Merge tag 'rust-fixes-6.11-2' of https://github.com/Rust-for-Linux/linux · 6c5b3e30
      Linus Torvalds authored
      Pull Rust fixes from Miguel Ojeda:
       "Toolchain and infrastructure:
      
         - Fix builds for nightly compiler users now that 'new_uninit' was
           split into new features by using an alternative approach for the
           code that used what is now called the 'box_uninit_write' feature
      
         - Allow the 'stable_features' lint to preempt upcoming warnings about
           them, since soon there will be unstable features that will become
           stable in nightly compilers
      
         - Export bss symbols too
      
        'kernel' crate:
      
         - 'block' module: fix wrong usage of lockdep API
      
        'macros' crate:
      
         - Provide correct provenance when constructing 'THIS_MODULE'
      
        Documentation:
      
         - Remove unintended indentation (blockquotes) in generated output
      
         - Fix a couple typos
      
        MAINTAINERS:
      
         - Remove Wedson as Rust maintainer
      
         - Update Andreas' email"
      
      * tag 'rust-fixes-6.11-2' of https://github.com/Rust-for-Linux/linux:
        MAINTAINERS: update Andreas Hindborg's email address
        MAINTAINERS: Remove Wedson as Rust maintainer
        rust: macros: provide correct provenance when constructing THIS_MODULE
        rust: allow `stable_features` lint
        docs: rust: remove unintended blockquote in Quick Start
        rust: alloc: eschew `Box<MaybeUninit<T>>::write`
        rust: kernel: fix typos in code comments
        docs: rust: remove unintended blockquote in Coding Guidelines
        rust: block: fix wrong usage of lockdep API
        rust: kbuild: fix export of bss symbols
      6c5b3e30
    • Linus Torvalds's avatar
      Merge tag 'trace-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace · e4b42053
      Linus Torvalds authored
      Pull tracing fixes from Steven Rostedt:
      
       - Fix adding a new fgraph callback after function graph tracing has
         already started.
      
         If the new caller does not initialize its hash before registering the
         fgraph_ops, it can cause a NULL pointer dereference. Fix this by
         adding a new parameter to ftrace_graph_enable_direct() passing in the
         newly added gops directly and not rely on using the fgraph_array[],
         as entries in the fgraph_array[] must be initialized.
      
         Assign the new gops to the fgraph_array[] after it goes through
         ftrace_startup_subops() as that will properly initialize the
         gops->ops and initialize its hashes.
      
       - Fix a memory leak in fgraph storage memory test.
      
         If the "multiple fgraph storage on a function" boot up selftest fails
         in the registering of the function graph tracer, it will not free the
         memory it allocated for the filter. Break the loop up into two where
         it allocates the filters first and then registers the functions where
         any errors will do the appropriate clean ups.
      
       - Only clear the timerlat timers if it has an associated kthread.
      
         In the rtla tool that uses timerlat, if it was killed just as it was
         shutting down, the signals can free the kthread and the timer. But
         the closing of the timerlat files could cause the hrtimer_cancel() to
         be called on the already freed timer. As the kthread variable is is
         set to NULL when the kthreads are stopped and the timers are freed it
         can be used to know not to call hrtimer_cancel() on the timer if the
         kthread variable is NULL.
      
       - Use a cpumask to keep track of osnoise/timerlat kthreads
      
         The timerlat tracer can use user space threads for its analysis. With
         the killing of the rtla tool, the kernel can get confused between if
         it is using a user space thread to analyze or one of its own kernel
         threads. When this confusion happens, kthread_stop() can be called on
         a user space thread and bad things happen. As the kernel threads are
         per-cpu, a bitmask can be used to know when a kernel thread is used
         or when a user space thread is used.
      
       - Add missing interface_lock to osnoise/timerlat stop_kthread()
      
         The stop_kthread() function in osnoise/timerlat clears the osnoise
         kthread variable, and if it was a user space thread does a put_task
         on it. But this can race with the closing of the timerlat files that
         also does a put_task on the kthread, and if the race happens the task
         will have put_task called on it twice and oops.
      
       - Add cond_resched() to the tracing_iter_reset() loop.
      
         The latency tracers keep writing to the ring buffer without resetting
         when it issues a new "start" event (like interrupts being disabled).
         When reading the buffer with an iterator, the tracing_iter_reset()
         sets its pointer to that start event by walking through all the
         events in the buffer until it gets to the time stamp of the start
         event. In the case of a very large buffer, the loop that looks for
         the start event has been reported taking a very long time with a non
         preempt kernel that it can trigger a soft lock up warning. Add a
         cond_resched() into that loop to make sure that doesn't happen.
      
       - Use list_del_rcu() for eventfs ei->list variable
      
         It was reported that running loops of creating and deleting kprobe
         events could cause a crash due to the eventfs list iteration hitting
         a LIST_POISON variable. This is because the list is protected by SRCU
         but when an item is deleted from the list, it was using list_del()
         which poisons the "next" pointer. This is what list_del_rcu() was to
         prevent.
      
      * tag 'trace-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
        tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()
        tracing/timerlat: Only clear timer if a kthread exists
        tracing/osnoise: Use a cpumask to know what threads are kthreads
        eventfs: Use list_del_rcu() for SRCU protected list variable
        tracing: Avoid possible softlockup in tracing_iter_reset()
        tracing: Fix memory leak in fgraph storage selftest
        tracing: fgraph: Fix to add new fgraph_ops to array after ftrace_startup_subops()
      e4b42053
    • Eric Dumazet's avatar
      ila: call nf_unregister_net_hooks() sooner · 031ae728
      Eric Dumazet authored
      syzbot found an use-after-free Read in ila_nf_input [1]
      
      Issue here is that ila_xlat_exit_net() frees the rhashtable,
      then call nf_unregister_net_hooks().
      
      It should be done in the reverse way, with a synchronize_rcu().
      
      This is a good match for a pre_exit() method.
      
      [1]
       BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:159 [inline]
       BUG: KASAN: use-after-free in __rhashtable_lookup include/linux/rhashtable.h:604 [inline]
       BUG: KASAN: use-after-free in rhashtable_lookup include/linux/rhashtable.h:646 [inline]
       BUG: KASAN: use-after-free in rhashtable_lookup_fast+0x77a/0x9b0 include/linux/rhashtable.h:672
      Read of size 4 at addr ffff888064620008 by task ksoftirqd/0/16
      
      CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-rc4-syzkaller-00238-g2ad6d23f #0
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
      Call Trace:
       <TASK>
        __dump_stack lib/dump_stack.c:93 [inline]
        dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
        print_address_description mm/kasan/report.c:377 [inline]
        print_report+0x169/0x550 mm/kasan/report.c:488
        kasan_report+0x143/0x180 mm/kasan/report.c:601
        rht_key_hashfn include/linux/rhashtable.h:159 [inline]
        __rhashtable_lookup include/linux/rhashtable.h:604 [inline]
        rhashtable_lookup include/linux/rhashtable.h:646 [inline]
        rhashtable_lookup_fast+0x77a/0x9b0 include/linux/rhashtable.h:672
        ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:132 [inline]
        ila_xlat_addr net/ipv6/ila/ila_xlat.c:652 [inline]
        ila_nf_input+0x1fe/0x3c0 net/ipv6/ila/ila_xlat.c:190
        nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
        nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
        nf_hook include/linux/netfilter.h:269 [inline]
        NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
        __netif_receive_skb_one_core net/core/dev.c:5661 [inline]
        __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5775
        process_backlog+0x662/0x15b0 net/core/dev.c:6108
        __napi_poll+0xcb/0x490 net/core/dev.c:6772
        napi_poll net/core/dev.c:6841 [inline]
        net_rx_action+0x89b/0x1240 net/core/dev.c:6963
        handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
        run_ksoftirqd+0xca/0x130 kernel/softirq.c:928
        smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
        kthread+0x2f0/0x390 kernel/kthread.c:389
        ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
       </TASK>
      
      The buggy address belongs to the physical page:
      page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x64620
      flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
      page_type: 0xbfffffff(buddy)
      raw: 00fff00000000000 ffffea0000959608 ffffea00019d9408 0000000000000000
      raw: 0000000000000000 0000000000000003 00000000bfffffff 0000000000000000
      page dumped because: kasan: bad access detected
      page_owner tracks the page as freed
      page last allocated via order 3, migratetype Unmovable, gfp_mask 0x52dc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO), pid 5242, tgid 5242 (syz-executor), ts 73611328570, free_ts 618981657187
        set_page_owner include/linux/page_owner.h:32 [inline]
        post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
        prep_new_page mm/page_alloc.c:1501 [inline]
        get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439
        __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695
        __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
        alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
        ___kmalloc_large_node+0x8b/0x1d0 mm/slub.c:4103
        __kmalloc_large_node_noprof+0x1a/0x80 mm/slub.c:4130
        __do_kmalloc_node mm/slub.c:4146 [inline]
        __kmalloc_node_noprof+0x2d2/0x440 mm/slub.c:4164
        __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650
        bucket_table_alloc lib/rhashtable.c:186 [inline]
        rhashtable_init_noprof+0x534/0xa60 lib/rhashtable.c:1071
        ila_xlat_init_net+0xa0/0x110 net/ipv6/ila/ila_xlat.c:613
        ops_init+0x359/0x610 net/core/net_namespace.c:139
        setup_net+0x515/0xca0 net/core/net_namespace.c:343
        copy_net_ns+0x4e2/0x7b0 net/core/net_namespace.c:508
        create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
        unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
        ksys_unshare+0x619/0xc10 kernel/fork.c:3328
        __do_sys_unshare kernel/fork.c:3399 [inline]
        __se_sys_unshare kernel/fork.c:3397 [inline]
        __x64_sys_unshare+0x38/0x40 kernel/fork.c:3397
      page last free pid 11846 tgid 11846 stack trace:
        reset_page_owner include/linux/page_owner.h:25 [inline]
        free_pages_prepare mm/page_alloc.c:1094 [inline]
        free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612
        __folio_put+0x2c8/0x440 mm/swap.c:128
        folio_put include/linux/mm.h:1486 [inline]
        free_large_kmalloc+0x105/0x1c0 mm/slub.c:4565
        kfree+0x1c4/0x360 mm/slub.c:4588
        rhashtable_free_and_destroy+0x7c6/0x920 lib/rhashtable.c:1169
        ila_xlat_exit_net+0x55/0x110 net/ipv6/ila/ila_xlat.c:626
        ops_exit_list net/core/net_namespace.c:173 [inline]
        cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640
        process_one_work kernel/workqueue.c:3231 [inline]
        process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
        worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
        kthread+0x2f0/0x390 kernel/kthread.c:389
        ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
      
      Memory state around the buggy address:
       ffff88806461ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
       ffff88806461ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      >ffff888064620000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                            ^
       ffff888064620080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
       ffff888064620100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
      
      Fixes: 7f00feaf ("ila: Add generic ILA translation facility")
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Tom Herbert <tom@herbertland.com>
      Reviewed-by: default avatarFlorian Westphal <fw@strlen.de>
      Link: https://patch.msgid.link/20240904144418.1162839-1-edumazet@google.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      031ae728
    • Arkadiusz Kubalewski's avatar
      tools/net/ynl: fix cli.py --subscribe feature · 6fda63c4
      Arkadiusz Kubalewski authored
      Execution of command:
      ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/dpll.yaml /
      	--subscribe "monitor" --sleep 10
      fails with:
        File "/repo/./tools/net/ynl/cli.py", line 109, in main
          ynl.check_ntf()
        File "/repo/tools/net/ynl/lib/ynl.py", line 924, in check_ntf
          op = self.rsp_by_value[nl_msg.cmd()]
      KeyError: 19
      
      Parsing Generic Netlink notification messages performs lookup for op in
      the message. The message was not yet decoded, and is not yet considered
      GenlMsg, thus msg.cmd() returns Generic Netlink family id (19) instead of
      proper notification command id (i.e.: DPLL_CMD_PIN_CHANGE_NTF=13).
      
      Allow the op to be obtained within NetlinkProtocol.decode(..) itself if the
      op was not passed to the decode function, thus allow parsing of Generic
      Netlink notifications without causing the failure.
      Suggested-by: default avatarDonald Hunter <donald.hunter@gmail.com>
      Link: https://lore.kernel.org/netdev/m2le0n5xpn.fsf@gmail.com/
      Fixes: 0a966d60 ("tools/net/ynl: Fix extack decoding for directional ops")
      Signed-off-by: default avatarArkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
      Reviewed-by: default avatarDonald Hunter <donald.hunter@gmail.com>
      Link: https://patch.msgid.link/20240904135034.316033-1-arkadiusz.kubalewski@intel.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      6fda63c4
    • Vadim Fedorenko's avatar
      MAINTAINERS: fix ptp ocp driver maintainers address · 20d664eb
      Vadim Fedorenko authored
      While checking the latest series for ptp_ocp driver I realised that
      MAINTAINERS file has wrong item about email on linux.dev domain.
      
      Fixes: 795fd934 ("ptp_ocp: adjust MAINTAINERS and mailmap")
      Signed-off-by: default avatarVadim Fedorenko <vadim.fedorenko@linux.dev>
      Reviewed-by: default avatarSimon Horman <horms@kernel.org>
      Link: https://patch.msgid.link/20240904131855.559078-1-vadim.fedorenko@linux.devSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      20d664eb
    • Jamie Bainbridge's avatar
      selftests: net: enable bind tests · e4af74a5
      Jamie Bainbridge authored
      bind_wildcard is compiled but not run, bind_timewait is not compiled.
      
      These two tests complete in a very short time, use the test harness
      properly, and seem reasonable to enable.
      
      The author of the tests confirmed via email that these were
      intended to be run.
      
      Enable these two tests.
      
      Fixes: 13715acf ("selftest: Add test for bind() conflicts.")
      Fixes: 2c042e8e ("tcp: Add selftest for bind() and TIME_WAIT.")
      Signed-off-by: default avatarJamie Bainbridge <jamie.bainbridge@gmail.com>
      Reviewed-by: default avatarEric Dumazet <edumazet@google.com>
      Reviewed-by: default avatarKuniyuki Iwashima <kuniyu@amazon.com>
      Link: https://patch.msgid.link/5a009b26cf5fb1ad1512d89c61b37e2fac702323.1725430322.git.jamie.bainbridge@gmail.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      e4af74a5
    • David Gow's avatar
      kunit: Fix missing kerneldoc comment · 12cb32a5
      David Gow authored
      Add a missing kerneldoc comment for the 'test' test context parameter,
      fixing the following warning:
      
      include/kunit/test.h:492: warning: Function parameter or struct member 'test' not described in 'kunit_kfree_const'
      Reported-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
      Closes: https://lore.kernel.org/lkml/20240827160631.67e121ed@canb.auug.org.au/
      Fixes: f2c6dbd2 ("kunit: Device wrappers should also manage driver name")
      Signed-off-by: default avatarDavid Gow <davidgow@google.com>
      Reviewed-by: default avatarKees Cook <kees@kernel.org>
      Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
      12cb32a5
    • Alex Deucher's avatar
      Revert "drm/amdgpu: align pp_power_profile_mode with kernel docs" · 1a8d8454
      Alex Deucher authored
      This reverts commit 8f614469.
      
      This breaks some manual setting of the profile mode in
      certain cases.
      
      Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3600Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      (cherry picked from commit 7a199557)
      Cc: stable@vger.kernel.org
      1a8d8454
    • Frank Li's avatar
      MAINTAINERS: SPI: Add mailing list imx@lists.linux.dev for nxp spi drivers · c9ca76e8
      Frank Li authored
      Add mailing list imx@lists.linux.dev for nxp spi drivers(qspi, fspi and
      dspi).
      Signed-off-by: default avatarFrank Li <Frank.Li@nxp.com>
      Reviewed-by: default avatarStefan Wahren <wahrenst@gmx.net>
      Link: https://patch.msgid.link/20240905155230.1901787-1-Frank.Li@nxp.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
      c9ca76e8
    • Frank Li's avatar
      MAINTAINERS: SPI: Add freescale lpspi maintainer information · fb9820c5
      Frank Li authored
      Add imx@lists.linux.dev and NXP maintainer information for lpspi driver
      (drivers/spi/spi-fsl-lpspi.c).
      Signed-off-by: default avatarFrank Li <Frank.Li@nxp.com>
      Reviewed-by: default avatarStefan Wahren <wahrenst@gmx.net>
      Link: https://patch.msgid.link/20240905154124.1901311-1-Frank.Li@nxp.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
      fb9820c5
    • Linus Torvalds's avatar
      Merge tag 'platform-drivers-x86-v6.11-6' of... · ad618736
      Linus Torvalds authored
      Merge tag 'platform-drivers-x86-v6.11-6' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
      
      Pull x86 platform driver fixes from Ilpo Järvinen:
      
       - amd/pmf: ASUS GA403 quirk matching tweak
      
       - dell-smbios: Fix to the init function rollback path
      
      * tag 'platform-drivers-x86-v6.11-6' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
        platform/x86/amd: pmf: Make ASUS GA403 quirk generic
        platform/x86: dell-smbios: Fix error path in dell_smbios_init()
      ad618736
    • Linus Torvalds's avatar
      Merge tag 'linux_kselftest-kunit-fixes-6.11-rc7' of... · 120434e5
      Linus Torvalds authored
      Merge tag 'linux_kselftest-kunit-fixes-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull kunit fix fromShuah Khan:
       "One single fix to a use-after-free bug resulting from
        kunit_driver_create() failing to copy the driver name leaving it on
        the stack or freeing it"
      
      * tag 'linux_kselftest-kunit-fixes-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
        kunit: Device wrappers should also manage driver name
      120434e5
    • Steven Rostedt's avatar
      KVM: Remove HIGH_RES_TIMERS dependency · 59cbd4ee
      Steven Rostedt authored
      Commit 92b5265d ("KVM: Depend on HIGH_RES_TIMERS") added a dependency
      to high resolution timers with the comment:
      
          KVM lapic timer and tsc deadline timer based on hrtimer,
          setting a leftmost node to rb tree and then do hrtimer reprogram.
          If hrtimer not configured as high resolution, hrtimer_enqueue_reprogram
          do nothing and then make kvm lapic timer and tsc deadline timer fail.
      
      That was back in 2012, where hrtimer_start_range_ns() would do the
      reprogramming with hrtimer_enqueue_reprogram(). But as that was a nop with
      high resolution timers disabled, this did not work. But a lot has changed
      in the last 12 years.
      
      For example, commit 49a2a075 ("hrtimer: Kick lowres dynticks targets on
      timer enqueue") modifies __hrtimer_start_range_ns() to work with low res
      timers. There's been lots of other changes that make low res work.
      
      ChromeOS has tested this before as well, and it hasn't seen any issues
      with running KVM with high res timers disabled.  There could be problems,
      especially at low HZ, for guests that do not support kvmclock and rely
      on precise delivery of periodic timers to keep their clock running.
      This can be the APIC timer (provided by the kernel), the RTC (provided
      by userspace), or the i8254 (choice of kernel/userspace).  These guests
      are few and far between these days, and in the case of the APIC timer +
      Intel hosts we can use the preemption timer (which is TSC-based and has
      better latency _and_ accuracy).
      
      In KVM, only x86 is requiring CONFIG_HIGH_RES_TIMERS; perhaps a "depends
      on HIGH_RES_TIMERS || EXPERT" could be added to virt/kvm, or a pr_warn
      could be added to kvm_init if HIGH_RES_TIMERS are not enabled.  But in
      general, it seems that there must be other code in the kernel (maybe
      sound/?) that is relying on having high-enough HZ or hrtimers but that's
      not documented anywhere.  Whenever you disable it you probably need to
      know what you're doing and what your workload is; so the dependency is
      not particularly interesting, and we can just remove it.
      Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
      Message-ID: <20240821095127.45d17b19@gandalf.local.home>
      [Added the last two paragraphs to the commit message. - Paolo]
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      59cbd4ee