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16 Commits

Author SHA1 Message Date
Linus Torvalds
4a57e0913e drm for v7.1-rc1 
mm:
 - two pass MMU interval notifiers
 - add gpu active/reclaim per-node stat counters
 
 math:
 - provide __KERNEL_DIV_ROUND_CLOSEST() in UAPI
 - implement DIV_ROUND_CLOSEST() with __KERNEL_DIV_ROUND_CLOSEST()
 
 rust:
 - shared tag with driver-core: register macro and io infra
 - core: rework DMA coherent API
 - core: add interop::list to interop with C linked lists
 - core: add more num::Bounded operations
 - core: enable generic_arg_infer and add EMSGSIZE
 - workqueue: add ARef<T> support for work and delayed work
 - add GPU buddy allocator abstraction
 - add DRM shmem GEM helper abstraction
 - allow drm:::Device to dispatch work and delayed work items
   to driver private data
 - add dma_resv_lock helper and raw accessors
 
 core:
 - introduce DRM RAS infrastructure over netlink
 - add connector panel_type property
 - fourcc: add ARM interleaved 64k modifier
 - colorop: add destroy helper
 - suballoc: split into alloc and init helpers
 - mode: provide DRM_ARGB_GET*() macros for reading color components
 
 edid:
 - provide drm_output_color_Format
 
 dma-buf:
 - provide revoke mechanism for shared buffers
 - rename move_notify to invalidate_mappings
 - always enable move_notify
 - protect dma_fence_ops with RCU and improve locking
 - clean pages with helpers
 
 atomic:
 - allocate drm_private_state via callback
 - helper: use system_percpu_wq
 
 buddy:
 - make buddy allocator available to gpu level
 - add kernel-doc for buddy allocator
 - improve aligned allocation
 
 ttm:
 - fix fence signalling
 - improve tests and docs
 - improve handling of gfp_retry_mayfail
 - use per-node stat counters to track memory allocations
 - port pool to use list_lru
 - drop NUMA specific pools
 - make pool shrinker numa aware
 - track allocated pages per numa node
 
 coreboot:
 - cleanup coreboot framebuffer support
 
 sched:
 - fix race condition in drm_sched_fini
 
 pagemap:
 - enable THP support
 - pass pagemap_addr by reference
 
 gem-shmem:
 - Track page accessed/dirty status across mmap/vmap
 
 gpusvm:
 - reenable device to device migration
 - fix unbalanced unclock
 
 bridge:
 - anx7625: Support USB-C plus DT bindings
 - connector: Fix EDID detection
 - dw-hdmi-qp: Support Vendor-Specfic and SDP Infoframes; improve others
 - fsl-ldb: Fix visual artifacts plus related DT property 'enable-termination-resistor'
 - imx8qxp-pixel-link: Improve bridge reference handling
 - lt9611: Support Port-B-only input plus DT bindings
 - tda998x: Support DRM_BRIDGE_ATTACH_NO_CONNECTOR; Clean up
 - Support TH1520 HDMI plus DT bindings
 - waveshare-dsi: Fix register and attach; Support 1..4 DSI lanes plus DT bindings
 - anx7625: Fix USB Type-C handling
 - cdns-mhdp8546-core: Handle HDCP state in bridge atomic_check
 - Support Lontium LT8713SX DP MST bridge plus DT bindings
 - analogix_dp: Use DP helpers for link training
 
 panel:
 - panel-jdi-lt070me05000: Use mipi-dsi multi functions
 - panel-edp: Support Add AUO B116XAT04.1 (HW: 1A); Support CMN N116BCL-EAK (C2); Support FriendlyELEC plus DT changes
 - panel-edp: Fix timings for BOE NV140WUM-N64
 - ilitek-ili9882t: Allow GPIO calls to sleep
 - jadard: Support TAIGUAN XTI05101-01A
 - lxd: Support LXD M9189A plus DT bindings
 - mantix: Fix pixel clock; Clean up
 - motorola: Support Motorola Atrix 4G and Droid X2 plus DT bindings
 - novatek: Support Novatek/Tianma NT37700F plus DT bindings
 - simple: Support EDT ET057023UDBA plus DT bindings; Support Powertip
   PH800480T032-ZHC19 plus DT bindings; Support Waveshare 13.3"
 - novatek-nt36672a: Use mipi_dsi_*_multi() functions
 - panel-edp: Support BOE NV153WUM-N42, CMN N153JCA-ELK, CSW MNF307QS3-2
 - support Himax HX83121A plus DT bindings
 - support JuTouch JT070TM041 plus DT bindings
 - support Samsung S6E8FC0 plus DT bindings
 - himax-hx83102c: support Samsung S6E8FC0 plus DT bindings; support backlight
 - ili9806e: support Rocktech RK050HR345-CT106A plus DT bindings
 - simple: support Tianma TM050RDH03 plus DT bindings
 
 amdgpu:
 - enable DC by default on CIK APUs
 - userq fence ioctl param size fixes
 - set panel_type to OLED for eDP
 - refactor DC i2c code
 - FAMS2 update
 - rework ttm handling to allow multiple engines
 - DC DCE 6.x cleanup
 - DC support for NUTMEG/TRAVIS DP bridge
 - DCN 4.2 support
 - GC12 idle power fix for compute
 - use struct drm_edid in non-DC code
 - enable NV12/P010 support on primary planes
 - support newer IP discovery tables
 - VCN/JPEG 5.0.2 support
 - GC/MES 12.1 updates
 - USERQ fixes
 - add DC idle state manager
 - eDP DSC seamless boot
 
 amdkfd:
 - GC 12.1 updates
 - non 4K page fixes
 
 xe:
 - basic Xe3p_LPG and NVL-P enabling patches
 - allow VM_BIND decompress support
 - add purgeable buffer object support
 - add xe_vm_get_property_ioctl
 - restrict multi-lrc to VCS/VECS engines
 - allow disabling VM overcommit in fault mode
 - dGPU memory optimizations
 - Workaround cleanups and simplification
 - Allow VFs VRAM quote changes using sysfs
 - convert GT stats to per-cpu counters
 - pagefault refactors
 - enable multi-queue on xe3p_xpc
 - disable DCC on PTL
 - make MMIO communication more robust
 - disable D3Cold for BMG on specific platforms
 - vfio: improve FLR sync for Xe VFIO
 
 i915/display:
 - C10/C20/LT PHY PLL divider verification
 - use trans push mechanism to generate PSR frame change on LNL+
 - refactor DP DSC slice config
 - VGA decode refactoring
 - refactor DPT, gen2-4 overlay, masked field register macro helpers
 - refactor stolen memory allocation decisions
 - prepare for UHBR DP tunnels
 - refactor LT PHY PLL to use DPLL framework
 - implement register polling/waiting in display code
 - add shared stepping header between i915 and display
 
 i915:
 - fix potential overflow of shmem scatterlist length
 
 nouveau:
 - provide Z cull info to userspace
 - initial GA100 support
 - shutdown on PCI device shutdown
 
 nova-core:
 - harden GSP command queue
 - add support for large RPCs
 - simplify GSP sequencer and message handling
 - refactor falcon firmware handling
 - convert to new register macro
 - conver to new DMA coherent API
 - use checked arithmetic
 - add debugfs support for gsp-rm log buffers
 - fix aux device registration for multi-GPU
 
 msm:
 - CI:
   - Uprev mesa
   - Restore CI jobs for Qualcomm APQ8016 and APQ8096 devices
 - Core:
   - Switched to of_get_available_child_by_name()
 - DPU:
   - Fixes for DSC panels
   - Fixed brownout because of the frequency / OPP mismatch
   - Quad pipe preparation (not enabled yet)
   - Switched to virtual planes by default
   - Dropped VBIF_NRT support
   - Added support for Eliza platform
   - Reworked alpha handling
   - Switched to correct CWB definitions on Eliza
   - Dropped dummy INTF_0 on MSM8953
   - Corrected INTFs related to DP-MST
 - DP:
   - Removed debug prints looking into PHY internals
 - DSI:
   - Fixes for DSC panels
   - RGB101010 support
   - Support for SC8280XP
   - Moved PHY bindings from display/ to phy/
 - GPU:
   - Preemption support for x2-85 and a840
   - IFPC support for a840
   - SKU detection support for x2-85 and a840
   - Expose AQE support (VK ray-pipeline)
   - Avoid locking in VM_BIND fence signaling path
   - Fix to avoid reclaim in GPU snapshot path
   - Disallow foreign mapping of _NO_SHARE BOs
 - HDMI:
   - Fixed infoframes programming
 - MDP5:
   - Dropped support for MSM8974v1
   - Dropped now unused code for MSM8974 v1 and SDM660 / MSM8998
 
 panthor:
 - add tracepoints for power and IRQs
 - fix fence handling
 - extend timestamp query with flags
 - support various sources for timestamp queries
 
 tyr:
 - fix names and model/versions
 
 rockchip:
 - vop2: use drm logging function
 - rk3576 displayport support
 - support CRTC background color
 
 atmel-hlcdc:
 - support sana5d65 LCD controller
 
 tilcdc:
 - use DT bindings schema
 - use managed DRM interfaces
 - support DRM_BRIDGE_ATTACH_NO_CONNECTOR
 
 verisilicon:
 - support DC8200 + DT bindings
 
 virtgpu:
 - support PRIME import with 3D enabled
 
 komeda:
 - fix integer overflow in AFBC checks
 
 mcde:
 - improve bridge handling
 
 gma500:
 - use drm client buffer for fbdev framebuffer
 
 amdxdna:
 - add sensors ioctls
 - provide NPU power estimate
 - support column utilization sensor
 - allow forcing DMA through IOMMU IOVA
 - support per-BO mem usage queries
 - refactor GEM implementation
 
 ivpu:
 - update boot API to v3.29.4
 - limit per-user number of doorbells/contexts
 - perform engine reset on TDR error
 
 loongson:
 - replace custom code with drm_gem_ttm_dumb_map_offset()
 
 imx:
 - support planes behind the primary plane
 - fix bus-format selection
 
 vkms:
 - support CRTC background color
 
 v3d:
 - improve handling of struct v3d_stats
 
 komeda:
 - support Arm China Linlon D6 plus DT bindings
 
 imagination:
 - improve power-off sequence
 - support context-reset notification from firmware
 
 mediatek:
 - mtk_dsi: enable hs clock during pre-enable
 - Remove all conflicting aperture devices during probe
 - Add support for mt8167 display blocks
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Merge tag 'drm-next-2026-04-15' of https://gitlab.freedesktop.org/drm/kernel

Pull drm updates from Dave Airlie:
 "Highlights:
   - new DRM RAS infrastructure using netlink
   - amdgpu: enable DC on CIK APUs, and more IP enablement, and more
     user queue work
   - xe: purgeable BO support, and new hw enablement
   - dma-buf : add revocable operations

  Full summary:

  mm:
   - two-pass MMU interval notifiers
   - add gpu active/reclaim per-node stat counters

  math:
   - provide __KERNEL_DIV_ROUND_CLOSEST() in UAPI
   - implement DIV_ROUND_CLOSEST() with __KERNEL_DIV_ROUND_CLOSEST()

  rust:
   - shared tag with driver-core: register macro and io infra
   - core: rework DMA coherent API
   - core: add interop::list to interop with C linked lists
   - core: add more num::Bounded operations
   - core: enable generic_arg_infer and add EMSGSIZE
   - workqueue: add ARef<T> support for work and delayed work
   - add GPU buddy allocator abstraction
   - add DRM shmem GEM helper abstraction
   - allow drm:::Device to dispatch work and delayed work items
     to driver private data
   - add dma_resv_lock helper and raw accessors

  core:
   - introduce DRM RAS infrastructure over netlink
   - add connector panel_type property
   - fourcc: add ARM interleaved 64k modifier
   - colorop: add destroy helper
   - suballoc: split into alloc and init helpers
   - mode: provide DRM_ARGB_GET*() macros for reading color components

  edid:
   - provide drm_output_color_Format

  dma-buf:
   - provide revoke mechanism for shared buffers
   - rename move_notify to invalidate_mappings
   - always enable move_notify
   - protect dma_fence_ops with RCU and improve locking
   - clean pages with helpers

  atomic:
   - allocate drm_private_state via callback
   - helper: use system_percpu_wq

  buddy:
   - make buddy allocator available to gpu level
   - add kernel-doc for buddy allocator
   - improve aligned allocation

  ttm:
   - fix fence signalling
   - improve tests and docs
   - improve handling of gfp_retry_mayfail
   - use per-node stat counters to track memory allocations
   - port pool to use list_lru
   - drop NUMA specific pools
   - make pool shrinker numa aware
   - track allocated pages per numa node

  coreboot:
   - cleanup coreboot framebuffer support

  sched:
   - fix race condition in drm_sched_fini

  pagemap:
   - enable THP support
   - pass pagemap_addr by reference

  gem-shmem:
   - Track page accessed/dirty status across mmap/vmap

  gpusvm:
   - reenable device to device migration
   - fix unbalanced unclock

  bridge:
   - anx7625: Support USB-C plus DT bindings
   - connector: Fix EDID detection
   - dw-hdmi-qp: Support Vendor-Specfic and SDP Infoframes; improve
     others
   - fsl-ldb: Fix visual artifacts plus related DT property
     'enable-termination-resistor'
   - imx8qxp-pixel-link: Improve bridge reference handling
   - lt9611: Support Port-B-only input plus DT bindings
   - tda998x: Support DRM_BRIDGE_ATTACH_NO_CONNECTOR; Clean up
   - Support TH1520 HDMI plus DT bindings
   - waveshare-dsi: Fix register and attach; Support 1..4 DSI lanes plus
     DT bindings
   - anx7625: Fix USB Type-C handling
   - cdns-mhdp8546-core: Handle HDCP state in bridge atomic_check
   - Support Lontium LT8713SX DP MST bridge plus DT bindings
   - analogix_dp: Use DP helpers for link training

  panel:
   - panel-jdi-lt070me05000: Use mipi-dsi multi functions
   - panel-edp: Support Add AUO B116XAT04.1 (HW: 1A); Support CMN
     N116BCL-EAK (C2); Support FriendlyELEC plus DT changes
   - panel-edp: Fix timings for BOE NV140WUM-N64
   - ilitek-ili9882t: Allow GPIO calls to sleep
   - jadard: Support TAIGUAN XTI05101-01A
   - lxd: Support LXD M9189A plus DT bindings
   - mantix: Fix pixel clock; Clean up
   - motorola: Support Motorola Atrix 4G and Droid X2 plus DT bindings
   - novatek: Support Novatek/Tianma NT37700F plus DT bindings
   - simple: Support EDT ET057023UDBA plus DT bindings; Support Powertip
     PH800480T032-ZHC19 plus DT bindings; Support Waveshare 13.3"
   - novatek-nt36672a: Use mipi_dsi_*_multi() functions
   - panel-edp: Support BOE NV153WUM-N42, CMN N153JCA-ELK, CSW
     MNF307QS3-2
   - support Himax HX83121A plus DT bindings
   - support JuTouch JT070TM041 plus DT bindings
   - support Samsung S6E8FC0 plus DT bindings
   - himax-hx83102c: support Samsung S6E8FC0 plus DT bindings; support
     backlight
   - ili9806e: support Rocktech RK050HR345-CT106A plus DT bindings
   - simple: support Tianma TM050RDH03 plus DT bindings

  amdgpu:
   - enable DC by default on CIK APUs
   - userq fence ioctl param size fixes
   - set panel_type to OLED for eDP
   - refactor DC i2c code
   - FAMS2 update
   - rework ttm handling to allow multiple engines
   - DC DCE 6.x cleanup
   - DC support for NUTMEG/TRAVIS DP bridge
   - DCN 4.2 support
   - GC12 idle power fix for compute
   - use struct drm_edid in non-DC code
   - enable NV12/P010 support on primary planes
   - support newer IP discovery tables
   - VCN/JPEG 5.0.2 support
   - GC/MES 12.1 updates
   - USERQ fixes
   - add DC idle state manager
   - eDP DSC seamless boot

  amdkfd:
   - GC 12.1 updates
   - non 4K page fixes

  xe:
   - basic Xe3p_LPG and NVL-P enabling patches
   - allow VM_BIND decompress support
   - add purgeable buffer object support
   - add xe_vm_get_property_ioctl
   - restrict multi-lrc to VCS/VECS engines
   - allow disabling VM overcommit in fault mode
   - dGPU memory optimizations
   - Workaround cleanups and simplification
   - Allow VFs VRAM quote changes using sysfs
   - convert GT stats to per-cpu counters
   - pagefault refactors
   - enable multi-queue on xe3p_xpc
   - disable DCC on PTL
   - make MMIO communication more robust
   - disable D3Cold for BMG on specific platforms
   - vfio: improve FLR sync for Xe VFIO

  i915/display:
   - C10/C20/LT PHY PLL divider verification
   - use trans push mechanism to generate PSR frame change on LNL+
   - refactor DP DSC slice config
   - VGA decode refactoring
   - refactor DPT, gen2-4 overlay, masked field register macro helpers
   - refactor stolen memory allocation decisions
   - prepare for UHBR DP tunnels
   - refactor LT PHY PLL to use DPLL framework
   - implement register polling/waiting in display code
   - add shared stepping header between i915 and display

  i915:
   - fix potential overflow of shmem scatterlist length

  nouveau:
   - provide Z cull info to userspace
   - initial GA100 support
   - shutdown on PCI device shutdown

  nova-core:
   - harden GSP command queue
   - add support for large RPCs
   - simplify GSP sequencer and message handling
   - refactor falcon firmware handling
   - convert to new register macro
   - conver to new DMA coherent API
   - use checked arithmetic
   - add debugfs support for gsp-rm log buffers
   - fix aux device registration for multi-GPU

  msm:
   - CI:
      - Uprev mesa
      - Restore CI jobs for Qualcomm APQ8016 and APQ8096 devices
   - Core:
      - Switched to of_get_available_child_by_name()
   - DPU:
      - Fixes for DSC panels
      - Fixed brownout because of the frequency / OPP mismatch
      - Quad pipe preparation (not enabled yet)
      - Switched to virtual planes by default
      - Dropped VBIF_NRT support
      - Added support for Eliza platform
      - Reworked alpha handling
      - Switched to correct CWB definitions on Eliza
      - Dropped dummy INTF_0 on MSM8953
      - Corrected INTFs related to DP-MST
   - DP:
      - Removed debug prints looking into PHY internals
   - DSI:
      - Fixes for DSC panels
      - RGB101010 support
      - Support for SC8280XP
      - Moved PHY bindings from display/ to phy/
   - GPU:
      - Preemption support for x2-85 and a840
      - IFPC support for a840
      - SKU detection support for x2-85 and a840
      - Expose AQE support (VK ray-pipeline)
      - Avoid locking in VM_BIND fence signaling path
      - Fix to avoid reclaim in GPU snapshot path
      - Disallow foreign mapping of _NO_SHARE BOs
   - HDMI:
      - Fixed infoframes programming
   - MDP5:
      - Dropped support for MSM8974v1
      - Dropped now unused code for MSM8974 v1 and SDM660 / MSM8998

  panthor:
   - add tracepoints for power and IRQs
   - fix fence handling
   - extend timestamp query with flags
   - support various sources for timestamp queries

  tyr:
   - fix names and model/versions

  rockchip:
   - vop2: use drm logging function
   - rk3576 displayport support
   - support CRTC background color

  atmel-hlcdc:
   - support sana5d65 LCD controller

  tilcdc:
   - use DT bindings schema
   - use managed DRM interfaces
   - support DRM_BRIDGE_ATTACH_NO_CONNECTOR

  verisilicon:
   - support DC8200 + DT bindings

  virtgpu:
   - support PRIME import with 3D enabled

  komeda:
   - fix integer overflow in AFBC checks

  mcde:
   - improve bridge handling

  gma500:
   - use drm client buffer for fbdev framebuffer

  amdxdna:
   - add sensors ioctls
   - provide NPU power estimate
   - support column utilization sensor
   - allow forcing DMA through IOMMU IOVA
   - support per-BO mem usage queries
   - refactor GEM implementation

  ivpu:
   - update boot API to v3.29.4
   - limit per-user number of doorbells/contexts
   - perform engine reset on TDR error

  loongson:
   - replace custom code with drm_gem_ttm_dumb_map_offset()

  imx:
   - support planes behind the primary plane
   - fix bus-format selection

  vkms:
   - support CRTC background color

  v3d:
   - improve handling of struct v3d_stats

  komeda:
   - support Arm China Linlon D6 plus DT bindings

  imagination:
   - improve power-off sequence
   - support context-reset notification from firmware

  mediatek:
   - mtk_dsi: enable hs clock during pre-enable
   - Remove all conflicting aperture devices during probe
   - Add support for mt8167 display blocks"

* tag 'drm-next-2026-04-15' of https://gitlab.freedesktop.org/drm/kernel: (1735 commits)
  drm/ttm/tests: Remove checks from ttm_pool_free_no_dma_alloc
  drm/ttm/tests: fix lru_count ASSERT
  drm/vram: remove DRM_VRAM_MM_FILE_OPERATIONS from docs
  drm/fb-helper: Fix a locking bug in an error path
  dma-fence: correct kernel-doc function parameter @flags
  ttm/pool: track allocated_pages per numa node.
  ttm/pool: make pool shrinker NUMA aware (v2)
  ttm/pool: drop numa specific pools
  ttm/pool: port to list_lru. (v2)
  drm/ttm: use gpu mm stats to track gpu memory allocations. (v4)
  mm: add gpu active/reclaim per-node stat counters (v2)
  gpu: nova-core: fix missing colon in SEC2 boot debug message
  gpu: nova-core: vbios: use from_le_bytes() for PCI ROM header parsing
  gpu: nova-core: bitfield: fix broken Default implementation
  gpu: nova-core: falcon: pad firmware DMA object size to required block alignment
  gpu: nova-core: gsp: fix undefined behavior in command queue code
  drm/shmem_helper: Make sure PMD entries get the writeable upgrade
  accel/ivpu: Trigger recovery on TDR with OS scheduling
  drm/msm: Use of_get_available_child_by_name()
  dt-bindings: display/msm: move DSI PHY bindings to phy/ subdir
  ...
 2026-04-15 08:45:00 -07:00
Linus Torvalds
a970ed1881 bitmap updates for v7.1 
- new API: bitmap_weight_from() and bitmap_weighted_xor() (Yury);
  - drop unused __find_nth_andnot_bit() (Yury);
  - new tests and test improvements (Andy, Akinobu, Yury);
  - fixes for count_zeroes API (Yury);
  - cleanup bitmap_print_to_pagebuf() mess (Yury);
  - documentation updates (Andy, Kai, Kit).
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Merge tag 'bitmap-for-v7.1' of https://github.com/norov/linux

Pull bitmap updates from Yury Norov:

 - new API: bitmap_weight_from() and bitmap_weighted_xor() (Yury)

 - drop unused __find_nth_andnot_bit() (Yury)

 - new tests and test improvements (Andy, Akinobu, Yury)

 - fixes for count_zeroes API (Yury)

 - cleanup bitmap_print_to_pagebuf() mess (Yury)

 - documentation updates (Andy, Kai, Kit).

* tag 'bitmap-for-v7.1' of https://github.com/norov/linux: (24 commits)
  bitops: Update kernel-doc for sign_extendXX()
  powerpc/xive: simplify xive_spapr_debug_show()
  thermal: intel: switch cpumask_get() to using cpumask_print_to_pagebuf()
  coresight: don't use bitmap_print_to_pagebuf()
  lib/prime_numbers: drop temporary buffer in dump_primes()
  drm/xe: switch xe_pagefault_queue_init() to using bitmap_weighted_or()
  ice: use bitmap_empty() in ice_vf_has_no_qs_ena
  ice: use bitmap_weighted_xor() in ice_find_free_recp_res_idx()
  bitmap: introduce bitmap_weighted_xor()
  bitmap: add test_zero_nbits()
  bitmap: exclude nbits == 0 cases from bitmap test
  bitmap: test bitmap_weight() for more
  asm-generic/bitops: Fix a comment typo in instrumented-atomic.h
  bitops: fix kernel-doc parameter name for parity8()
  lib: count_zeros: unify count_{leading,trailing}_zeros()
  lib: count_zeros: fix 32/64-bit inconsistency in count_trailing_zeros()
  lib: crypto: fix comments for count_leading_zeros()
  x86/topology: use bitmap_weight_from()
  bitmap: add bitmap_weight_from()
  lib/find_bit_benchmark: avoid clearing randomly filled bitmap in test_find_first_bit()
  ...
 2026-04-14 08:55:18 -07:00
Yury Norov
ac679a6e0f drm/xe: switch xe_pagefault_queue_init() to using bitmap_weighted_or() 
The function calls bitmap_or() immediately followed by bitmap_weight().
Switch to using the dedicated bitmap_weighted_or() and save one bitmap
traverse.

Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Yury Norov <ynorov@nvidia.com>
 2026-04-09 13:28:05 -04:00
Jonathan Cavitt
6d192b4f2d
drm/xe/xe_pagefault: Disallow writes to read-only VMAs 
The page fault handler should reject write/atomic access to read only
VMAs.  Add code to handle this in xe_pagefault_service after the VMA
lookup.

v2:
- Apply max line length (Matthew)

Fixes: fb544b8445 ("drm/xe: Implement xe_pagefault_queue_work")
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Cc: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260324152935.72444-7-jonathan.cavitt@intel.com
(cherry picked from commit 714ee6754a)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
 2026-03-30 08:51:29 -04:00
Arvind Yadav
ad9843aac9 drm/xe/madvise: Implement purgeable buffer object support 
This allows userspace applications to provide memory usage hints to
the kernel for better memory management under pressure:

Add the core implementation for purgeable buffer objects, enabling
memory reclamation of user-designated DONTNEED buffers during eviction.

This patch implements the purge operation and state machine transitions:

Purgeable States (from xe_madv_purgeable_state):
 - WILLNEED (0): BO should be retained, actively used
 - DONTNEED (1): BO eligible for purging, not currently needed
 - PURGED (2): BO backing store reclaimed, permanently invalid

Design Rationale:
  - Async TLB invalidation via trigger_rebind (no blocking
    xe_vm_invalidate_vma)
  - i915 compatibility: retained field, "once purged always purged"
    semantics
  - Shared BO protection prevents multi-process memory corruption
  - Scratch PTE reuse avoids new infrastructure, safe for fault mode

Note: The madvise_purgeable() function is implemented but not hooked
into the IOCTL handler (madvise_funcs[] entry is NULL) to maintain
bisectability. The feature will be enabled in the final patch when all
supporting infrastructure (shrinker, per-VMA tracking) is complete.

Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Arvind Yadav <arvind.yadav@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260326130843.3545241-4-arvind.yadav@intel.com
 2026-03-26 19:57:10 -07:00
Jonathan Cavitt
64c732ee2a drm/xe/xe_vm: Add per VM fault info 
Add additional information to each VM so they can report up to the first
50 seen faults.  Only pagefaults are saved this way currently, though in
the future, all faults should be tracked by the VM for future reporting.

Additionally, of the pagefaults reported, only failed pagefaults are
saved this way, as successful pagefaults should recover silently and not
need to be reported to userspace.

v2:
- Free vm after use (Shuicheng)
- Compress pf copy logic (Shuicheng)
- Update fault_unsuccessful before storing (Shuicheng)
- Fix old struct name in comments (Shuicheng)
- Keep first 50 pagefaults instead of last 50 (Jianxun)

v3:
- Avoid unnecessary execution by checking MAX_PFS earlier (jcavitt)
- Fix double-locking error (jcavitt)
- Assert kmemdump is successful (Shuicheng)

v4:
- Rename xe_vm.pfs to xe_vm.faults (jcavitt)
- Store fault data and not pagefault in xe_vm faults list (jcavitt)
- Store address, address type, and address precision per fault (jcavitt)
- Store engine class and instance data per fault (Jianxun)
- Add and fix kernel docs (Michal W)
- Properly handle kzalloc error (Michal W)
- s/MAX_PFS/MAX_FAULTS_SAVED_PER_VM (Michal W)
- Store fault level per fault (Micahl M)

v5:
- Store fault and access type instead of address type (Jianxun)

v6:
- Store pagefaults in non-fault-mode VMs as well (Jianxun)

v7:
- Fix kernel docs and comments (Michal W)

v8:
- Fix double-locking issue (Jianxun)

v9:
- Do not report faults from reserved engines (Jianxun)

v10:
- Remove engine class and instance (Ivan)

v11:
- Perform kzalloc outside of lock (Auld)

v12:
- Fix xe_vm_fault_entry kernel docs (Shuicheng)

v13:
- Rebase and refactor (jcavitt)

v14:
- Correctly ignore fault mode in save_pagefault_to_vm (jcavitt)

v15:
- s/save_pagefault_to_vm/xe_pagefault_save_to_vm (Matt Brost)
- Use guard instead of spin_lock/unlock (Matt Brost)
- GT was added to xe_pagefault struct.  Use xe_gt_hw_engine
  instead of creating a new helper function (Matt Brost)

v16:
- Set address precision programmatically (Matt Brost)

v17:
- Set address precision to fixed value (Matt Brost)

v18:
- s/uAPI/Link in commit log links
- Use kzalloc_obj

Link: https://github.com/intel/compute-runtime/pull/878
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Cc: Shuicheng Lin <shuicheng.lin@intel.com>
Cc: Jianxun Zhang <jianxun.zhang@intel.com>
Cc: Michal Wajdeczko <Michal.Wajdeczko@intel.com>
Cc: Michal Mzorek <michal.mzorek@intel.com>
Cc: Ivan Briano <ivan.briano@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260324152935.72444-9-jonathan.cavitt@intel.com
 2026-03-25 18:05:57 -07:00
Jonathan Cavitt
714ee6754a drm/xe/xe_pagefault: Disallow writes to read-only VMAs 
The page fault handler should reject write/atomic access to read only
VMAs.  Add code to handle this in xe_pagefault_service after the VMA
lookup.

v2:
- Apply max line length (Matthew)

Fixes: fb544b8445 ("drm/xe: Implement xe_pagefault_queue_work")
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Cc: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260324152935.72444-7-jonathan.cavitt@intel.com
 2026-03-25 18:05:55 -07:00
Varun Gupta
f5ab554a6a drm/xe: Add prefetch fault support for Xe3p 
Xe3p hardware prefetches memory ranges and notifies software via an
additional bit (bit 11) in the page fault descriptor that the fault
was caused by prefetch.

Extract the prefetch bit from the fault descriptor and echo it in the
response (bit 6) only when the page fault handling fails. This allows
the HW to suppress CAT errors for unsuccessful prefetch faults.

For prefetch faults that fail, increment stats counter without verbose
logging to avoid spamming the log. The prefetch flag is packed into
BIT(7) of the access_type field to avoid growing the consumer struct.

Based on original patches by Brian Welty <brian.welty@intel.com> and
Priyanka Dandamudi <priyanka.dandamudi@intel.com>.

Bspec: 59311
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Priyanka Dandamudi <priyanka.dandamudi@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Varun Gupta <varun.gupta@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260223061906.1420883-3-varun.gupta@intel.com
 2026-02-23 12:31:32 -08:00
Matthew Brost
68be2bfe4b drm/xe: Pack fault type and level into a u8 
Pack the fault type and level fields into a single u8 to save space in
struct xe_pagefault. This also makes future extensions easier.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20260212204227.2764054-2-matthew.brost@intel.com
 2026-02-13 12:03:39 -08:00
Matthew Brost
651065dca3 drm/xe: Increase log level for unhandled page faults 
Set the kernel log level for unhandled page faults to match the log
level (info) for engine resets. Currently, dmesg output can be confusing
because it shows an engine reset without indicating the page fault that
caused it. Without this change, the GuC log must be examined to
determine the source of the engine reset.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Link: https://patch.msgid.link/20251218223745.4045207-1-matthew.brost@intel.com
 2025-12-19 11:45:28 -08:00
Mika Kuoppala
62519b77ae drm/xe: Fix memory leak when handling pagefault vma 
When the pagefault handling code was moved to a new file, an extra
drm_exec_init() was added to the VMA path. This call is unnecessary because
xe_validation_ctx_init() already performs a drm_exec_init(), resulting in a
memory leak reported by kmemleak.

Remove the redundant drm_exec_init() from the VMA pagefault handling code.

Fixes: fb544b8445 ("drm/xe: Implement xe_pagefault_queue_work")
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Stuart Summers <stuart.summers@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: intel-xe@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251120161435.3674556-1-mika.kuoppala@linux.intel.com
 2025-11-21 07:18:16 -08:00
Matthew Brost
fb544b8445 drm/xe: Implement xe_pagefault_queue_work 
Implement a worker that services page faults, using the same
implementation as in xe_gt_pagefault.c.

v2:
 - Rebase on exhaustive eviction changes
 - Include engine instance in debug prints (Stuart)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Tested-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20251031165416.2871503-6-matthew.brost@intel.com
 2025-11-04 09:04:29 -08:00
Matthew Brost
143aa16572 drm/xe: Implement xe_pagefault_handler 
Enqueue (copy) the input struct xe_pagefault into a queue (i.e., into a
memory buffer) and schedule a worker to service it.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Francois Dugast <francois.dugast@intel.com>
Tested-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20251031165416.2871503-5-matthew.brost@intel.com
 2025-11-04 09:04:29 -08:00
Matthew Brost
79be336d1a drm/xe: Implement xe_pagefault_reset 
Squash any pending faults on the GT being reset by setting the GT field
in struct xe_pagefault to NULL.

v4:
 - Only do reset it page faults queues initialized (CI)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Tested-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20251031165416.2871503-4-matthew.brost@intel.com
 2025-11-04 09:04:29 -08:00
Matthew Brost
1919d1687e drm/xe: Implement xe_pagefault_init 
Create pagefault queues and initialize them.

v2:
 - Fix kernel doc + add comment for number PF queue (Francois)
v4:
 - Move init after GT init (CI, Francois)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Francois Dugast <francois.dugast@intel.com>
Tested-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20251031165416.2871503-3-matthew.brost@intel.com
 2025-11-04 09:04:26 -08:00
Matthew Brost
620a09fb0b drm/xe: Stub out new pagefault layer 
Stub out the new page fault layer and add kernel documentation. This is
intended as a replacement for the GT page fault layer, enabling multiple
producers to hook into a shared page fault consumer interface.

v2:
 - Fix kernel doc typo (checkpatch)
 - Remove comment around GT (Stuart)
 - Add explaination around reclaim (Francois)
 - Add comment around u8 vs enum (Francois)
 - Include engine instance (Stuart)
v3:
 - Fix XE_PAGEFAULT_TYPE_ATOMIC_ACCESS_VIOLATION kernel doc (Stuart)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Tested-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20251031165416.2871503-2-matthew.brost@intel.com
 2025-11-04 09:01:58 -08:00