Commit graph

1570 commits

Author SHA1 Message Date
Linus Torvalds
beace86e61 Summary of significant series in this pull request:
- The 4 patch series "mm: ksm: prevent KSM from breaking merging of new
   VMAs" from Lorenzo Stoakes addresses an issue with KSM's
   PR_SET_MEMORY_MERGE mode: newly mapped VMAs were not eligible for
   merging with existing adjacent VMAs.
 
 - The 4 patch series "mm/damon: introduce DAMON_STAT for simple and
   practical access monitoring" from SeongJae Park adds a new kernel module
   which simplifies the setup and usage of DAMON in production
   environments.
 
 - The 6 patch series "stop passing a writeback_control to swap/shmem
   writeout" from Christoph Hellwig is a cleanup to the writeback code
   which removes a couple of pointers from struct writeback_control.
 
 - The 7 patch series "drivers/base/node.c: optimization and cleanups"
   from Donet Tom contains largely uncorrelated cleanups to the NUMA node
   setup and management code.
 
 - The 4 patch series "mm: userfaultfd: assorted fixes and cleanups" from
   Tal Zussman does some maintenance work on the userfaultfd code.
 
 - The 5 patch series "Readahead tweaks for larger folios" from Ryan
   Roberts implements some tuneups for pagecache readahead when it is
   reading into order>0 folios.
 
 - The 4 patch series "selftests/mm: Tweaks to the cow test" from Mark
   Brown provides some cleanups and consistency improvements to the
   selftests code.
 
 - The 4 patch series "Optimize mremap() for large folios" from Dev Jain
   does that.  A 37% reduction in execution time was measured in a
   memset+mremap+munmap microbenchmark.
 
 - The 5 patch series "Remove zero_user()" from Matthew Wilcox expunges
   zero_user() in favor of the more modern memzero_page().
 
 - The 3 patch series "mm/huge_memory: vmf_insert_folio_*() and
   vmf_insert_pfn_pud() fixes" from David Hildenbrand addresses some warts
   which David noticed in the huge page code.  These were not known to be
   causing any issues at this time.
 
 - The 3 patch series "mm/damon: use alloc_migrate_target() for
   DAMOS_MIGRATE_{HOT,COLD" from SeongJae Park provides some cleanup and
   consolidation work in DAMON.
 
 - The 3 patch series "use vm_flags_t consistently" from Lorenzo Stoakes
   uses vm_flags_t in places where we were inappropriately using other
   types.
 
 - The 3 patch series "mm/memfd: Reserve hugetlb folios before
   allocation" from Vivek Kasireddy increases the reliability of large page
   allocation in the memfd code.
 
 - The 14 patch series "mm: Remove pXX_devmap page table bit and pfn_t
   type" from Alistair Popple removes several now-unneeded PFN_* flags.
 
 - The 5 patch series "mm/damon: decouple sysfs from core" from SeongJae
   Park implememnts some cleanup and maintainability work in the DAMON
   sysfs layer.
 
 - The 5 patch series "madvise cleanup" from Lorenzo Stoakes does quite a
   lot of cleanup/maintenance work in the madvise() code.
 
 - The 4 patch series "madvise anon_name cleanups" from Vlastimil Babka
   provides additional cleanups on top or Lorenzo's effort.
 
 - The 11 patch series "Implement numa node notifier" from Oscar Salvador
   creates a standalone notifier for NUMA node memory state changes.
   Previously these were lumped under the more general memory on/offline
   notifier.
 
 - The 6 patch series "Make MIGRATE_ISOLATE a standalone bit" from Zi Yan
   cleans up the pageblock isolation code and fixes a potential issue which
   doesn't seem to cause any problems in practice.
 
 - The 5 patch series "selftests/damon: add python and drgn based DAMON
   sysfs functionality tests" from SeongJae Park adds additional drgn- and
   python-based DAMON selftests which are more comprehensive than the
   existing selftest suite.
 
 - The 5 patch series "Misc rework on hugetlb faulting path" from Oscar
   Salvador fixes a rather obscure deadlock in the hugetlb fault code and
   follows that fix with a series of cleanups.
 
 - The 3 patch series "cma: factor out allocation logic from
   __cma_declare_contiguous_nid" from Mike Rapoport rationalizes and cleans
   up the highmem-specific code in the CMA allocator.
 
 - The 28 patch series "mm/migration: rework movable_ops page migration
   (part 1)" from David Hildenbrand provides cleanups and
   future-preparedness to the migration code.
 
 - The 2 patch series "mm/damon: add trace events for auto-tuned
   monitoring intervals and DAMOS quota" from SeongJae Park adds some
   tracepoints to some DAMON auto-tuning code.
 
 - The 6 patch series "mm/damon: fix misc bugs in DAMON modules" from
   SeongJae Park does that.
 
 - The 6 patch series "mm/damon: misc cleanups" from SeongJae Park also
   does what it claims.
 
 - The 4 patch series "mm: folio_pte_batch() improvements" from David
   Hildenbrand cleans up the large folio PTE batching code.
 
 - The 13 patch series "mm/damon/vaddr: Allow interleaving in
   migrate_{hot,cold} actions" from SeongJae Park facilitates dynamic
   alteration of DAMON's inter-node allocation policy.
 
 - The 3 patch series "Remove unmap_and_put_page()" from Vishal Moola
   provides a couple of page->folio conversions.
 
 - The 4 patch series "mm: per-node proactive reclaim" from Davidlohr
   Bueso implements a per-node control of proactive reclaim - beyond the
   current memcg-based implementation.
 
 - The 14 patch series "mm/damon: remove damon_callback" from SeongJae
   Park replaces the damon_callback interface with a more general and
   powerful damon_call()+damos_walk() interface.
 
 - The 10 patch series "mm/mremap: permit mremap() move of multiple VMAs"
   from Lorenzo Stoakes implements a number of mremap cleanups (of course)
   in preparation for adding new mremap() functionality: newly permit the
   remapping of multiple VMAs when the user is specifying MREMAP_FIXED.  It
   still excludes some specialized situations where this cannot be
   performed reliably.
 
 - The 3 patch series "drop hugetlb_free_pgd_range()" from Anthony Yznaga
   switches some sparc hugetlb code over to the generic version and removes
   the thus-unneeded hugetlb_free_pgd_range().
 
 - The 4 patch series "mm/damon/sysfs: support periodic and automated
   stats update" from SeongJae Park augments the present
   userspace-requested update of DAMON sysfs monitoring files.  Automatic
   update is now provided, along with a tunable to control the update
   interval.
 
 - The 4 patch series "Some randome fixes and cleanups to swapfile" from
   Kemeng Shi does what is claims.
 
 - The 4 patch series "mm: introduce snapshot_page" from Luiz Capitulino
   and David Hildenbrand provides (and uses) a means by which debug-style
   functions can grab a copy of a pageframe and inspect it locklessly
   without tripping over the races inherent in operating on the live
   pageframe directly.
 
 - The 6 patch series "use per-vma locks for /proc/pid/maps reads" from
   Suren Baghdasaryan addresses the large contention issues which can be
   triggered by reads from that procfs file.  Latencies are reduced by more
   than half in some situations.  The series also introduces several new
   selftests for the /proc/pid/maps interface.
 
 - The 6 patch series "__folio_split() clean up" from Zi Yan cleans up
   __folio_split()!
 
 - The 7 patch series "Optimize mprotect() for large folios" from Dev
   Jain provides some quite large (>3x) speedups to mprotect() when dealing
   with large folios.
 
 - The 2 patch series "selftests/mm: reuse FORCE_READ to replace "asm
   volatile("" : "+r" (XXX));" and some cleanup" from wang lian does some
   cleanup work in the selftests code.
 
 - The 3 patch series "tools/testing: expand mremap testing" from Lorenzo
   Stoakes extends the mremap() selftest in several ways, including adding
   more checking of Lorenzo's recently added "permit mremap() move of
   multiple VMAs" feature.
 
 - The 22 patch series "selftests/damon/sysfs.py: test all parameters"
   from SeongJae Park extends the DAMON sysfs interface selftest so that it
   tests all possible user-requested parameters.  Rather than the present
   minimal subset.
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Merge tag 'mm-stable-2025-07-30-15-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:
 "As usual, many cleanups. The below blurbiage describes 42 patchsets.
  21 of those are partially or fully cleanup work. "cleans up",
  "cleanup", "maintainability", "rationalizes", etc.

  I never knew the MM code was so dirty.

  "mm: ksm: prevent KSM from breaking merging of new VMAs" (Lorenzo Stoakes)
     addresses an issue with KSM's PR_SET_MEMORY_MERGE mode: newly
     mapped VMAs were not eligible for merging with existing adjacent
     VMAs.

  "mm/damon: introduce DAMON_STAT for simple and practical access monitoring" (SeongJae Park)
     adds a new kernel module which simplifies the setup and usage of
     DAMON in production environments.

  "stop passing a writeback_control to swap/shmem writeout" (Christoph Hellwig)
     is a cleanup to the writeback code which removes a couple of
     pointers from struct writeback_control.

  "drivers/base/node.c: optimization and cleanups" (Donet Tom)
     contains largely uncorrelated cleanups to the NUMA node setup and
     management code.

  "mm: userfaultfd: assorted fixes and cleanups" (Tal Zussman)
     does some maintenance work on the userfaultfd code.

  "Readahead tweaks for larger folios" (Ryan Roberts)
     implements some tuneups for pagecache readahead when it is reading
     into order>0 folios.

  "selftests/mm: Tweaks to the cow test" (Mark Brown)
     provides some cleanups and consistency improvements to the
     selftests code.

  "Optimize mremap() for large folios" (Dev Jain)
     does that. A 37% reduction in execution time was measured in a
     memset+mremap+munmap microbenchmark.

  "Remove zero_user()" (Matthew Wilcox)
     expunges zero_user() in favor of the more modern memzero_page().

  "mm/huge_memory: vmf_insert_folio_*() and vmf_insert_pfn_pud() fixes" (David Hildenbrand)
     addresses some warts which David noticed in the huge page code.
     These were not known to be causing any issues at this time.

  "mm/damon: use alloc_migrate_target() for DAMOS_MIGRATE_{HOT,COLD" (SeongJae Park)
     provides some cleanup and consolidation work in DAMON.

  "use vm_flags_t consistently" (Lorenzo Stoakes)
     uses vm_flags_t in places where we were inappropriately using other
     types.

  "mm/memfd: Reserve hugetlb folios before allocation" (Vivek Kasireddy)
     increases the reliability of large page allocation in the memfd
     code.

  "mm: Remove pXX_devmap page table bit and pfn_t type" (Alistair Popple)
     removes several now-unneeded PFN_* flags.

  "mm/damon: decouple sysfs from core" (SeongJae Park)
     implememnts some cleanup and maintainability work in the DAMON
     sysfs layer.

  "madvise cleanup" (Lorenzo Stoakes)
     does quite a lot of cleanup/maintenance work in the madvise() code.

  "madvise anon_name cleanups" (Vlastimil Babka)
     provides additional cleanups on top or Lorenzo's effort.

  "Implement numa node notifier" (Oscar Salvador)
     creates a standalone notifier for NUMA node memory state changes.
     Previously these were lumped under the more general memory
     on/offline notifier.

  "Make MIGRATE_ISOLATE a standalone bit" (Zi Yan)
     cleans up the pageblock isolation code and fixes a potential issue
     which doesn't seem to cause any problems in practice.

  "selftests/damon: add python and drgn based DAMON sysfs functionality tests" (SeongJae Park)
     adds additional drgn- and python-based DAMON selftests which are
     more comprehensive than the existing selftest suite.

  "Misc rework on hugetlb faulting path" (Oscar Salvador)
     fixes a rather obscure deadlock in the hugetlb fault code and
     follows that fix with a series of cleanups.

  "cma: factor out allocation logic from __cma_declare_contiguous_nid" (Mike Rapoport)
     rationalizes and cleans up the highmem-specific code in the CMA
     allocator.

  "mm/migration: rework movable_ops page migration (part 1)" (David Hildenbrand)
     provides cleanups and future-preparedness to the migration code.

  "mm/damon: add trace events for auto-tuned monitoring intervals and DAMOS quota" (SeongJae Park)
     adds some tracepoints to some DAMON auto-tuning code.

  "mm/damon: fix misc bugs in DAMON modules" (SeongJae Park)
     does that.

  "mm/damon: misc cleanups" (SeongJae Park)
     also does what it claims.

  "mm: folio_pte_batch() improvements" (David Hildenbrand)
     cleans up the large folio PTE batching code.

  "mm/damon/vaddr: Allow interleaving in migrate_{hot,cold} actions" (SeongJae Park)
     facilitates dynamic alteration of DAMON's inter-node allocation
     policy.

  "Remove unmap_and_put_page()" (Vishal Moola)
     provides a couple of page->folio conversions.

  "mm: per-node proactive reclaim" (Davidlohr Bueso)
     implements a per-node control of proactive reclaim - beyond the
     current memcg-based implementation.

  "mm/damon: remove damon_callback" (SeongJae Park)
     replaces the damon_callback interface with a more general and
     powerful damon_call()+damos_walk() interface.

  "mm/mremap: permit mremap() move of multiple VMAs" (Lorenzo Stoakes)
     implements a number of mremap cleanups (of course) in preparation
     for adding new mremap() functionality: newly permit the remapping
     of multiple VMAs when the user is specifying MREMAP_FIXED. It still
     excludes some specialized situations where this cannot be performed
     reliably.

  "drop hugetlb_free_pgd_range()" (Anthony Yznaga)
     switches some sparc hugetlb code over to the generic version and
     removes the thus-unneeded hugetlb_free_pgd_range().

  "mm/damon/sysfs: support periodic and automated stats update" (SeongJae Park)
     augments the present userspace-requested update of DAMON sysfs
     monitoring files. Automatic update is now provided, along with a
     tunable to control the update interval.

  "Some randome fixes and cleanups to swapfile" (Kemeng Shi)
     does what is claims.

  "mm: introduce snapshot_page" (Luiz Capitulino and David Hildenbrand)
     provides (and uses) a means by which debug-style functions can grab
     a copy of a pageframe and inspect it locklessly without tripping
     over the races inherent in operating on the live pageframe
     directly.

  "use per-vma locks for /proc/pid/maps reads" (Suren Baghdasaryan)
     addresses the large contention issues which can be triggered by
     reads from that procfs file. Latencies are reduced by more than
     half in some situations. The series also introduces several new
     selftests for the /proc/pid/maps interface.

  "__folio_split() clean up" (Zi Yan)
     cleans up __folio_split()!

  "Optimize mprotect() for large folios" (Dev Jain)
     provides some quite large (>3x) speedups to mprotect() when dealing
     with large folios.

  "selftests/mm: reuse FORCE_READ to replace "asm volatile("" : "+r" (XXX));" and some cleanup" (wang lian)
     does some cleanup work in the selftests code.

  "tools/testing: expand mremap testing" (Lorenzo Stoakes)
     extends the mremap() selftest in several ways, including adding
     more checking of Lorenzo's recently added "permit mremap() move of
     multiple VMAs" feature.

  "selftests/damon/sysfs.py: test all parameters" (SeongJae Park)
     extends the DAMON sysfs interface selftest so that it tests all
     possible user-requested parameters. Rather than the present minimal
     subset"

* tag 'mm-stable-2025-07-30-15-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (370 commits)
  MAINTAINERS: add missing headers to mempory policy & migration section
  MAINTAINERS: add missing file to cgroup section
  MAINTAINERS: add MM MISC section, add missing files to MISC and CORE
  MAINTAINERS: add missing zsmalloc file
  MAINTAINERS: add missing files to page alloc section
  MAINTAINERS: add missing shrinker files
  MAINTAINERS: move memremap.[ch] to hotplug section
  MAINTAINERS: add missing mm_slot.h file THP section
  MAINTAINERS: add missing interval_tree.c to memory mapping section
  MAINTAINERS: add missing percpu-internal.h file to per-cpu section
  mm/page_alloc: remove trace_mm_alloc_contig_migrate_range_info()
  selftests/damon: introduce _common.sh to host shared function
  selftests/damon/sysfs.py: test runtime reduction of DAMON parameters
  selftests/damon/sysfs.py: test non-default parameters runtime commit
  selftests/damon/sysfs.py: generalize DAMON context commit assertion
  selftests/damon/sysfs.py: generalize monitoring attributes commit assertion
  selftests/damon/sysfs.py: generalize DAMOS schemes commit assertion
  selftests/damon/sysfs.py: test DAMOS filters commitment
  selftests/damon/sysfs.py: generalize DAMOS scheme commit assertion
  selftests/damon/sysfs.py: test DAMOS destinations commitment
  ...
2025-07-31 14:57:54 -07:00
Linus Torvalds
260f6f4fda drm for 6.17-rc1
non-drm:
 rust:
 - make ETIMEDOUT available
 - add size constants up to SZ_2G
 - add DMA coherent allocation bindings
 mtd:
 - driver for Intel GPU non-volatile storage
 i2c
 - designware quirk for Intel xe
 
 core:
 - atomic helpers: tune enable/disable sequences
 - add task info to wedge API
 - refactor EDID quirks
 - connector: move HDR sink to drm_display_info
 - fourcc: half-float and 32-bit float formats
 - mode_config: pass format info to simplify
 
 dma-buf:
 - heaps: Give CMA heap a stable name
 
 ci:
 - add device tree validation and kunit
 
 displayport:
 - change AUX DPCD access probe address
 - add quirk for DPCD probe
 - add panel replay definitions
 - backlight control helpers
 
 fbdev:
 - make CONFIG_FIRMWARE_EDID available on all arches
 
 fence:
 - fix UAF issues
 
 format-helper:
 - improve tests
 
 gpusvm:
 - introduce devmem only flag for allocation
 - add timeslicing support to GPU SVM
 
 ttm:
 - improve eviction
 
 sched:
 - tracing improvements
 - kunit improvements
 - memory leak fixes
 - reset handling improvements
 
 color mgmt:
 - add hardware gamma LUT handling helpers
 
 bridge:
 - add destroy hook
 - switch to reference counted drm_bridge allocations
 - tc358767: convert to devm_drm_bridge_alloc
 - improve CEC handling
 
 panel:
 - switch to reference counter drm_panel allocations
 - fwnode panel lookup
 - Huiling hl055fhv028c support
 - Raspberry Pi 7" 720x1280 support
 - edp: KDC KD116N3730A05, N160JCE-ELL CMN, N116BCJ-EAK
 - simple: AUO P238HAN01
 - st7701: Winstar wf40eswaa6mnn0
 - visionox: rm69299-shift
 - Renesas R61307, Renesas R69328 support
 - DJN HX83112B
 
 hdmi:
 - add CEC handling
 - YUV420 output support
 
 xe:
 - WildCat Lake support
 - Enable PanthorLake by default
 - mark BMG as SRIOV capable
 - update firmware recommendations
 - Expose media OA units
 - aux-bux support for non-volatile memory
 - MTD intel-dg driver for non-volatile memory
 - Expose fan control and voltage regulator in sysfs
 - restructure migration for multi-device
 - Restore GuC submit UAF fix
 - make GEM shrinker drm managed
 - SRIOV VF Post-migration recovery of GGTT nodes
 - W/A additions/reworks
 - Prefetch support for svm ranges
 - Don't allocate managed BO for each policy change
 - HWMON fixes for BMG
 - Create LRC BO without VM
 - PCI ID updates
 - make SLPC debugfs files optional
 - rework eviction rejection of bound external BOs
 - consolidate PAT programming logic for pre/post Xe2
 - init changes for flicker-free boot
 - Enable GuC Dynamic Inhibit Context switch
 
 i915:
 - drm_panic support for i915/xe
 - initial flip queue off by default for LNL/PNL
 - Wildcat Lake Display support
 - Support for DSC fractional link bpp
 - Support for simultaneous Panel Replay and Adaptive sync
 - Support for PTL+ double buffer LUT
 - initial PIPEDMC event handling
 - drm_panel_follower support
 - DPLL interface renames
 - allocate struct intel_display dynamically
 - flip queue preperation
 - abstract DRAM detection better
 - avoid GuC scheduling stalls
 - remove DG1 force probe requirement
 - fix MEI interrupt handler on RT kernels
 - use backlight control helpers for eDP
 - more shared display code refactoring
 
 amdgpu:
 - add userq slot to INFO ioctl
 - SR-IOV hibernation support
 - Suspend improvements
 - Backlight improvements
 - Use scaling for non-native eDP modes
 - cleaner shader updates for GC 9.x
 - Remove fence slab
 - SDMA fw checks for userq support
 - RAS updates
 - DMCUB updates
 - DP tunneling fixes
 - Display idle D3 support
 - Per queue reset improvements
 - initial smartmux support
 
 amdkfd:
 - enable KFD on loongarch
 - mtype fix for ext coherent system memory
 
 radeon:
 - CS validation additional GL extensions
 - drop console lock during suspend/resume
 - bump driver version
 
 msm:
 - VM BIND support
 - CI: infrastructure updates
 - UBWC single source of truth
 - decouple GPU and KMS support
 - DP: rework I/O accessors
 - DPU: SM8750 support
 - DSI: SM8750 support
 - GPU: X1-45 support and speedbin support for X1-85
 - MDSS: SM8750 support
 
 nova:
 - register! macro improvements
 - DMA object abstraction
 - VBIOS parser + fwsec lookup
 - sysmem flush page support
 - falcon: generic falcon boot code and HAL
 - FWSEC-FRTS: fb setup and load/execute
 
 ivpu:
 - Add Wildcat Lake support
 - Add turbo flag
 
 ast:
 - improve hardware generations implementation
 
 imx:
 - IMX8qxq Display Controller support
 
 lima:
 - Rockchip RK3528 GPU support
 
 nouveau:
 - fence handling cleanup
 
 panfrost:
 - MT8370 support
 - bo labeling
 - 64-bit register access
 
 qaic:
 - add RAS support
 
 rockchip:
 - convert inno_hdmi to a bridge
 
 rz-du:
 - add RZ/V2H(P) support
 - MIPI-DSI DCS support
 
 sitronix:
 - ST7567 support
 
 sun4i:
 - add H616 support
 
 tidss:
 - add TI AM62L support
 - AM65x OLDI bridge support
 
 bochs:
 - drm panic support
 
 vkms:
 - YUV and R* format support
 - use faux device
 
 vmwgfx:
 - fence improvements
 
 hyperv:
 - move out of simple
 - add drm_panic support
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Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

Pull drm updates from Dave Airlie:
 "Highlights:

   - Intel xe enable Panthor Lake, started adding WildCat Lake

   - amdgpu has a bunch of reset improvments along with the usual IP
     updates

   - msm got VM_BIND support which is important for vulkan sparse memory

   - more drm_panic users

   - gpusvm common code to handle a bunch of core SVM work outside
     drivers.

  Detail summary:

  Changes outside drm subdirectory:
   - 'shrink_shmem_memory()' for better shmem/hibernate interaction
   - Rust support infrastructure:
      - make ETIMEDOUT available
      - add size constants up to SZ_2G
      - add DMA coherent allocation bindings
   - mtd driver for Intel GPU non-volatile storage
   - i2c designware quirk for Intel xe

  core:
   - atomic helpers: tune enable/disable sequences
   - add task info to wedge API
   - refactor EDID quirks
   - connector: move HDR sink to drm_display_info
   - fourcc: half-float and 32-bit float formats
   - mode_config: pass format info to simplify

  dma-buf:
   - heaps: Give CMA heap a stable name

  ci:
   - add device tree validation and kunit

  displayport:
   - change AUX DPCD access probe address
   - add quirk for DPCD probe
   - add panel replay definitions
   - backlight control helpers

  fbdev:
   - make CONFIG_FIRMWARE_EDID available on all arches

  fence:
   - fix UAF issues

  format-helper:
   - improve tests

  gpusvm:
   - introduce devmem only flag for allocation
   - add timeslicing support to GPU SVM

  ttm:
   - improve eviction

  sched:
   - tracing improvements
   - kunit improvements
   - memory leak fixes
   - reset handling improvements

  color mgmt:
   - add hardware gamma LUT handling helpers

  bridge:
   - add destroy hook
   - switch to reference counted drm_bridge allocations
   - tc358767: convert to devm_drm_bridge_alloc
   - improve CEC handling

  panel:
   - switch to reference counter drm_panel allocations
   - fwnode panel lookup
   - Huiling hl055fhv028c support
   - Raspberry Pi 7" 720x1280 support
   - edp: KDC KD116N3730A05, N160JCE-ELL CMN, N116BCJ-EAK
   - simple: AUO P238HAN01
   - st7701: Winstar wf40eswaa6mnn0
   - visionox: rm69299-shift
   - Renesas R61307, Renesas R69328 support
   - DJN HX83112B

  hdmi:
   - add CEC handling
   - YUV420 output support

  xe:
   - WildCat Lake support
   - Enable PanthorLake by default
   - mark BMG as SRIOV capable
   - update firmware recommendations
   - Expose media OA units
   - aux-bux support for non-volatile memory
   - MTD intel-dg driver for non-volatile memory
   - Expose fan control and voltage regulator in sysfs
   - restructure migration for multi-device
   - Restore GuC submit UAF fix
   - make GEM shrinker drm managed
   - SRIOV VF Post-migration recovery of GGTT nodes
   - W/A additions/reworks
   - Prefetch support for svm ranges
   - Don't allocate managed BO for each policy change
   - HWMON fixes for BMG
   - Create LRC BO without VM
   - PCI ID updates
   - make SLPC debugfs files optional
   - rework eviction rejection of bound external BOs
   - consolidate PAT programming logic for pre/post Xe2
   - init changes for flicker-free boot
   - Enable GuC Dynamic Inhibit Context switch

  i915:
   - drm_panic support for i915/xe
   - initial flip queue off by default for LNL/PNL
   - Wildcat Lake Display support
   - Support for DSC fractional link bpp
   - Support for simultaneous Panel Replay and Adaptive sync
   - Support for PTL+ double buffer LUT
   - initial PIPEDMC event handling
   - drm_panel_follower support
   - DPLL interface renames
   - allocate struct intel_display dynamically
   - flip queue preperation
   - abstract DRAM detection better
   - avoid GuC scheduling stalls
   - remove DG1 force probe requirement
   - fix MEI interrupt handler on RT kernels
   - use backlight control helpers for eDP
   - more shared display code refactoring

  amdgpu:
   - add userq slot to INFO ioctl
   - SR-IOV hibernation support
   - Suspend improvements
   - Backlight improvements
   - Use scaling for non-native eDP modes
   - cleaner shader updates for GC 9.x
   - Remove fence slab
   - SDMA fw checks for userq support
   - RAS updates
   - DMCUB updates
   - DP tunneling fixes
   - Display idle D3 support
   - Per queue reset improvements
   - initial smartmux support

  amdkfd:
   - enable KFD on loongarch
   - mtype fix for ext coherent system memory

  radeon:
   - CS validation additional GL extensions
   - drop console lock during suspend/resume
   - bump driver version

  msm:
   - VM BIND support
   - CI: infrastructure updates
   - UBWC single source of truth
   - decouple GPU and KMS support
   - DP: rework I/O accessors
   - DPU: SM8750 support
   - DSI: SM8750 support
   - GPU: X1-45 support and speedbin support for X1-85
   - MDSS: SM8750 support

  nova:
   - register! macro improvements
   - DMA object abstraction
   - VBIOS parser + fwsec lookup
   - sysmem flush page support
   - falcon: generic falcon boot code and HAL
   - FWSEC-FRTS: fb setup and load/execute

  ivpu:
   - Add Wildcat Lake support
   - Add turbo flag

  ast:
   - improve hardware generations implementation

  imx:
   - IMX8qxq Display Controller support

  lima:
   - Rockchip RK3528 GPU support

  nouveau:
   - fence handling cleanup

  panfrost:
   - MT8370 support
   - bo labeling
   - 64-bit register access

  qaic:
   - add RAS support

  rockchip:
   - convert inno_hdmi to a bridge

  rz-du:
   - add RZ/V2H(P) support
   - MIPI-DSI DCS support

  sitronix:
   - ST7567 support

  sun4i:
   - add H616 support

  tidss:
   - add TI AM62L support
   - AM65x OLDI bridge support

  bochs:
   - drm panic support

  vkms:
   - YUV and R* format support
   - use faux device

  vmwgfx:
   - fence improvements

  hyperv:
   - move out of simple
   - add drm_panic support"

* tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel: (1479 commits)
  drm/tidss: oldi: convert to devm_drm_bridge_alloc() API
  drm/tidss: encoder: convert to devm_drm_bridge_alloc()
  drm/amdgpu: move reset support type checks into the caller
  drm/amdgpu/sdma7: re-emit unprocessed state on ring reset
  drm/amdgpu/sdma6: re-emit unprocessed state on ring reset
  drm/amdgpu/sdma5.2: re-emit unprocessed state on ring reset
  drm/amdgpu/sdma5: re-emit unprocessed state on ring reset
  drm/amdgpu/gfx12: re-emit unprocessed state on ring reset
  drm/amdgpu/gfx11: re-emit unprocessed state on ring reset
  drm/amdgpu/gfx10: re-emit unprocessed state on ring reset
  drm/amdgpu/gfx9.4.3: re-emit unprocessed state on kcq reset
  drm/amdgpu/gfx9: re-emit unprocessed state on kcq reset
  drm/amdgpu: Add WARN_ON to the resource clear function
  drm/amd/pm: Use cached metrics data on SMUv13.0.6
  drm/amd/pm: Use cached data for min/max clocks
  gpu: nova-core: fix bounds check in PmuLookupTableEntry::new
  drm/amdgpu: Replace HQD terminology with slots naming
  drm/amdgpu: Add user queue instance count in HW IP info
  drm/amd/amdgpu: Add helper functions for isp buffers
  drm/amd/amdgpu: Initialize swnode for ISP MFD device
  ...
2025-07-30 19:26:49 -07:00
Linus Torvalds
7031769e10 vfs-6.17-rc1.mmap_prepare
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Merge tag 'vfs-6.17-rc1.mmap_prepare' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull mmap_prepare updates from Christian Brauner:
 "Last cycle we introduce f_op->mmap_prepare() in c84bf6dd2b ("mm:
  introduce new .mmap_prepare() file callback").

  This is preferred to the existing f_op->mmap() hook as it does require
  a VMA to be established yet, thus allowing the mmap logic to invoke
  this hook far, far earlier, prior to inserting a VMA into the virtual
  address space, or performing any other heavy handed operations.

  This allows for much simpler unwinding on error, and for there to be a
  single attempt at merging a VMA rather than having to possibly
  reattempt a merge based on potentially altered VMA state.

  Far more importantly, it prevents inappropriate manipulation of
  incompletely initialised VMA state, which is something that has been
  the cause of bugs and complexity in the past.

  The intent is to gradually deprecate f_op->mmap, and in that vein this
  series coverts the majority of file systems to using f_op->mmap_prepare.

  Prerequisite steps are taken - firstly ensuring all checks for mmap
  capabilities use the file_has_valid_mmap_hooks() helper rather than
  directly checking for f_op->mmap (which is now not a valid check) and
  secondly updating daxdev_mapping_supported() to not require a VMA
  parameter to allow ext4 and xfs to be converted.

  Commit bb666b7c27 ("mm: add mmap_prepare() compatibility layer for
  nested file systems") handles the nasty edge-case of nested file
  systems like overlayfs, which introduces a compatibility shim to allow
  f_op->mmap_prepare() to be invoked from an f_op->mmap() callback.

  This allows for nested filesystems to continue to function correctly
  with all file systems regardless of which callback is used. Once we
  finally convert all file systems, this shim can be removed.

  As a result, ecryptfs, fuse, and overlayfs remain unaltered so they
  can nest all other file systems.

  We additionally do not update resctl - as this requires an update to
  remap_pfn_range() (or an alternative to it) which we defer to a later
  series, equally we do not update cramfs which needs a mixed mapping
  insertion with the same issue, nor do we update procfs, hugetlbfs,
  syfs or kernfs all of which require VMAs for internal state and hooks.
  We shall return to all of these later"

* tag 'vfs-6.17-rc1.mmap_prepare' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  doc: update porting, vfs documentation to describe mmap_prepare()
  fs: replace mmap hook with .mmap_prepare for simple mappings
  fs: convert most other generic_file_*mmap() users to .mmap_prepare()
  fs: convert simple use of generic_file_*_mmap() to .mmap_prepare()
  mm/filemap: introduce generic_file_*_mmap_prepare() helpers
  fs/xfs: transition from deprecated .mmap hook to .mmap_prepare
  fs/ext4: transition from deprecated .mmap hook to .mmap_prepare
  fs/dax: make it possible to check dev dax support without a VMA
  fs: consistently use can_mmap_file() helper
  mm/nommu: use file_has_valid_mmap_hooks() helper
  mm: rename call_mmap/mmap_prepare to vfs_mmap/mmap_prepare
2025-07-28 13:43:25 -07:00
Linus Torvalds
7879d7aff0 vfs-6.17-rc1.misc
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Merge tag 'vfs-6.17-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull misc VFS updates from Christian Brauner:
 "This contains the usual selections of misc updates for this cycle.

  Features:

   - Add ext4 IOCB_DONTCACHE support

     This refactors the address_space_operations write_begin() and
     write_end() callbacks to take const struct kiocb * as their first
     argument, allowing IOCB flags such as IOCB_DONTCACHE to propagate
     to the filesystem's buffered I/O path.

     Ext4 is updated to implement handling of the IOCB_DONTCACHE flag
     and advertises support via the FOP_DONTCACHE file operation flag.

     Additionally, the i915 driver's shmem write paths are updated to
     bypass the legacy write_begin/write_end interface in favor of
     directly calling write_iter() with a constructed synchronous kiocb.
     Another i915 change replaces a manual write loop with
     kernel_write() during GEM shmem object creation.

  Cleanups:

   - don't duplicate vfs_open() in kernel_file_open()

   - proc_fd_getattr(): don't bother with S_ISDIR() check

   - fs/ecryptfs: replace snprintf with sysfs_emit in show function

   - vfs: Remove unnecessary list_for_each_entry_safe() from
     evict_inodes()

   - filelock: add new locks_wake_up_waiter() helper

   - fs: Remove three arguments from block_write_end()

   - VFS: change old_dir and new_dir in struct renamedata to dentrys

   - netfs: Remove unused declaration netfs_queue_write_request()

  Fixes:

   - eventpoll: Fix semi-unbounded recursion

   - eventpoll: fix sphinx documentation build warning

   - fs/read_write: Fix spelling typo

   - fs: annotate data race between poll_schedule_timeout() and
     pollwake()

   - fs/pipe: set FMODE_NOWAIT in create_pipe_files()

   - docs/vfs: update references to i_mutex to i_rwsem

   - fs/buffer: remove comment about hard sectorsize

   - fs/buffer: remove the min and max limit checks in __getblk_slow()

   - fs/libfs: don't assume blocksize <= PAGE_SIZE in
     generic_check_addressable

   - fs_context: fix parameter name in infofc() macro

   - fs: Prevent file descriptor table allocations exceeding INT_MAX"

* tag 'vfs-6.17-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (24 commits)
  netfs: Remove unused declaration netfs_queue_write_request()
  eventpoll: fix sphinx documentation build warning
  ext4: support uncached buffered I/O
  mm/pagemap: add write_begin_get_folio() helper function
  fs: change write_begin/write_end interface to take struct kiocb *
  drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter
  drm/i915: Use kernel_write() in shmem object create
  eventpoll: Fix semi-unbounded recursion
  vfs: Remove unnecessary list_for_each_entry_safe() from evict_inodes()
  fs/libfs: don't assume blocksize <= PAGE_SIZE in generic_check_addressable
  fs/buffer: remove the min and max limit checks in __getblk_slow()
  fs: Prevent file descriptor table allocations exceeding INT_MAX
  fs: Remove three arguments from block_write_end()
  fs/ecryptfs: replace snprintf with sysfs_emit in show function
  fs: annotate suspected data race between poll_schedule_timeout() and pollwake()
  docs/vfs: update references to i_mutex to i_rwsem
  fs/buffer: remove comment about hard sectorsize
  fs_context: fix parameter name in infofc() macro
  VFS: change old_dir and new_dir in struct renamedata to dentrys
  proc_fd_getattr(): don't bother with S_ISDIR() check
  ...
2025-07-28 11:22:56 -07:00
Taotao Chen
048832a3f4
drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter
Refactors shmem_pwrite() to replace the ->write_begin/end logic
with a write_iter-based implementation using kiocb and iov_iter.

While kernel_write() was considered, it caused about 50% performance
regression. vfs_write() is not exported for kernel use. Therefore,
file->f_op->write_iter() is called directly with a synchronously
initialized kiocb to preserve performance and remove write_begin
usage.

Performance results use gem_pwrite on Intel CPU i7-10700
(average of 10 runs):

- ./gem_pwrite --run-subtest bench -s 16384
  Before: 0.205s, After: 0.214s

- ./gem_pwrite --run-subtest bench -s 524288
  Before: 6.1021s, After: 4.8047s

Part of a series refactoring address_space_operations write_begin and
write_end callbacks to use struct kiocb for passing write context and
flags.

Signed-off-by: Taotao Chen <chentaotao@didiglobal.com>
Link: https://lore.kernel.org/20250716093559.217344-3-chentaotao@didiglobal.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-07-16 14:48:18 +02:00
Taotao Chen
e7b840fd49
drm/i915: Use kernel_write() in shmem object create
Replace the write_begin/write_end loop in
i915_gem_object_create_shmem_from_data() with call to kernel_write().

This function initializes shmem-backed GEM objects. kernel_write()
simplifies the code by removing manual folio handling.

Part of a series refactoring address_space_operations write_begin and
write_end callbacks to use struct kiocb for passing write context and
flags.

Signed-off-by: Taotao Chen <chentaotao@didiglobal.com>
Link: https://lore.kernel.org/20250716093559.217344-2-chentaotao@didiglobal.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-07-16 14:48:18 +02:00
Alistair Popple
21aa65bf82 mm: remove callers of pfn_t functionality
All PFN_* pfn_t flags have been removed.  Therefore there is no longer a
need for the pfn_t type and all uses can be replaced with normal pfns.

Link: https://lkml.kernel.org/r/bbedfa576c9822f8032494efbe43544628698b1f.1750323463.git-series.apopple@nvidia.com
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Balbir Singh <balbirs@nvidia.com>
Cc: Björn Töpel <bjorn@kernel.org>
Cc: Björn Töpel <bjorn@rivosinc.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Deepak Gupta <debug@rivosinc.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Inki Dae <m.szyprowski@samsung.com>
Cc: John Groves <john@groves.net>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-07-09 22:42:19 -07:00
Christoph Hellwig
a8fb49c6ab mm: remove the for_reclaim field from struct writeback_control
This field is now only set to one in the i915 gem code that only calls
writeback_iter on it, which ignores the flag.  All other checks are thuse
dead code and the field can be removed.

Link: https://lkml.kernel.org/r/20250610054959.2057526-7-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-07-09 22:41:58 -07:00
Christoph Hellwig
44b1b073eb mm: stop passing a writeback_control structure to shmem_writeout
shmem_writeout only needs the swap_iocb cookie and the split folio list. 
Pass those explicitly and remove the now unused list member from struct
writeback_control.

Link: https://lkml.kernel.org/r/20250610054959.2057526-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-07-09 22:41:57 -07:00
Simona Vetter
69d09a2609 Merge tag 'drm-intel-next-2025-07-04' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next
drm/i915 feature pull #2 for v6.17:

Features and functionality:
- Add drm_panic support for both i915 and xe drivers (Jocelyn Falempe)
- Add initial flip queue implementation, disabled by default, for LNL and PTL
  (Ville)
- Add support for Wildcat Lake (WCL) display, version 30.02 (Matt Roper, Matt
  Atwood, Dnyaneshwar)
- Extend drm_panel and follower support to DDI eDP (Arun)

Refactoring and cleanups:
- Make all global state objects opaque (Jani)
- Move display works to display specific unordered workqueue (Luca)
- Add and use struct drm_device based pcode interface (Jani, Lucas)
- Use clamp() instead of max()+min() combo (Ankit)
- Simplify wait for power well disable (Jani)
- Various stylistics cleanups and renames (Jani)

Fixes:
- Deal with loss of pipe DMC state (Ville)
- Fix PTL HDCP2 stream status check (Suraj)
- Add workaround for ADL-P DKL PHY DP and HDMI (Nemesa)
- Fix skl_print_wm_changes() stack usage with KMSAN (Arnd Bergmann)
- Fix PCON capability reads on non-branch devices (Chaitanya)
- Fix which platforms have ultra joiner (Ankit)

DRM core changes:
- Add ttm_bo_kmap_try_from_panic() for xe drm_panic support (Jocelyn Falempe)
- Add private pointer to struct drm_scanout buffer for xe/i915 drm_panic support
  (Jocelyn Falempe)

Merges:
- Backmerge drm-next for drm_panel and xe changes (Jani)

Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/6d728bf6ef23681b00dfbc7da9aeae41042dee02@intel.com
2025-07-08 14:07:44 +02:00
Dave Airlie
ca39a37174 Merge tag 'drm-intel-gt-next-2025-07-02' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next
Driver Changes:

Fixes/improvements/new stuff:

- Avoid GuC scheduling stalls [guc] (Julia Filipchuk)
- Remove force_probe requirement for DG1 (Ville Syrjälä)
- Handle errors correctly to avoid losing GuC-2-Host messages [guc] (Jesus Narvaez)
- Avoid double wakeref put if GuC context deregister failed [guc] (Jesus Narvaez)
- Avoid timeline memory leak with signals and legacy platforms [ringbuf] (Janusz Krzysztofik)
- Fix MEI (discrete) interrupt handler on RT kernels [gsc] (Junxiao Chang)

Miscellaneous:

- Allow larger memory allocation [selftest] (Mikolaj Wasiak)
- Use provided dma_fence_is_chain (Tvrtko Ursulin)
- Fix build error with GCOV and AutoFDO enabled [pmu] (Tzung-Bi Shih)
- Fix build error some more (Arnd Bergmann)
- Reduce stack usage in igt_vma_pin1() (Arnd Bergmann)
- Move out engine related macros from i915_drv.h (Krzysztof Karas)
- Move GEM_QUIRK_PIN_SWIZZLED_PAGES to i915_gem.h (Krzysztof Karas)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tursulin@igalia.com>
Link: https://lore.kernel.org/r/aGTjUBeOQFw26bRT@linux
2025-07-04 11:43:30 +10:00
Al Viro
24368a744b sanitize handling of long-term internal mounts
Original rationale for those had been the reduced cost of mntput()
for the stuff that is mounted somewhere.  Mount refcount increments and
decrements are frequent; what's worse, they tend to concentrate on the
same instances and cacheline pingpong is quite noticable.

As the result, mount refcounts are per-cpu; that allows a very cheap
increment.  Plain decrement would be just as easy, but decrement-and-test
is anything but (we need to add the components up, with exclusion against
possible increment-from-zero, etc.).

Fortunately, there is a very common case where we can tell that decrement
won't be the final one - if the thing we are dropping is currently
mounted somewhere.  We have an RCU delay between the removal from mount
tree and dropping the reference that used to pin it there, so we can
just take rcu_read_lock() and check if the victim is mounted somewhere.
If it is, we can go ahead and decrement without and further checks -
the reference we are dropping is not the last one.  If it isn't, we
get all the fun with locking, carefully adding up components, etc.,
but the majority of refcount decrements end up taking the fast path.

There is a major exception, though - pipes and sockets.  Those live
on the internal filesystems that are not going to be mounted anywhere.
They are not going to be _un_mounted, of course, so having to take the
slow path every time a pipe or socket gets closed is really obnoxious.
Solution had been to mark them as long-lived ones - essentially faking
"they are mounted somewhere" indicator.

With minor modification that works even for ones that do eventually get
dropped - all it takes is making sure we have an RCU delay between
clearing the "mounted somewhere" indicator and dropping the reference.

There are some additional twists (if you want to drop a dozen of such
internal mounts, you'd be better off with clearing the indicator on
all of them, doing an RCU delay once, then dropping the references),
but in the basic form it had been
	* use kern_mount() if you want your internal mount to be
a long-term one.
	* use kern_unmount() to undo that.

Unfortunately, the things did rot a bit during the mount API reshuffling.
In several cases we have lost the "fake the indicator" part; kern_unmount()
on the unmount side remained (it doesn't warn if you use it on a mount
without the indicator), but all benefits regaring mntput() cost had been
lost.

To get rid of that bitrot, let's add a new helper that would work
with fs_context-based API: fc_mount_longterm().  It's a counterpart
of fc_mount() that does, on success, mark its result as long-term.
It must be paired with kern_unmount() or equivalents.

Converted:
	1) mqueue (it used to use kern_mount_data() and the umount side
is still as it used to be)
	2) hugetlbfs (used to use kern_mount_data(), internal mount is
never unmounted in this one)
	3) i915 gemfs (used to be kern_mount() + manual remount to set
options, still uses kern_unmount() on umount side)
	4) v3d gemfs (copied from i915)

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2025-06-29 18:13:41 -04:00
Jocelyn Falempe
116d86dd69 drm/i915/display: Add drm_panic support for Y-tiling with DPT
On Alder Lake and later, it's not possible to disable tiling when DPT
is enabled.
So this commit implements Y-Tiling support, to still be able to draw
the panic screen.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250624091501.257661-10-jfalempe@redhat.com
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
2025-06-27 11:48:23 +02:00
Jocelyn Falempe
75fb60e5ad drm/i915: Add intel_bo_panic_setup() and intel_bo_panic_finish()
Implement both functions for i915 and xe, they prepare the work for
drm_panic support.
They both use kmap_try_from_panic(), and map one page at a time, to
write the panic screen on the framebuffer.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250624091501.257661-8-jfalempe@redhat.com
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
2025-06-27 11:48:22 +02:00
Jocelyn Falempe
da091afacb drm/i915: Add intel_bo_alloc_framebuffer()
Encapsulate the struct intel_framebuffer into an xe_framebuffer
or i915_framebuffer, and allow to add specific fields for each
variant for the panic use-case.
This is particularly needed to have a struct xe_res_cursor available
to support drm panic on discrete GPU.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250624091501.257661-7-jfalempe@redhat.com
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
2025-06-27 11:48:22 +02:00
Lorenzo Stoakes
20ca475d98
mm: rename call_mmap/mmap_prepare to vfs_mmap/mmap_prepare
The call_mmap() function violates the existing convention in
include/linux/fs.h whereby invocations of virtual file system hooks is
performed by functions prefixed with vfs_xxx().

Correct this by renaming call_mmap() to vfs_mmap(). This also avoids
confusion as to the fact that f_op->mmap_prepare may be invoked here.

Also rename __call_mmap_prepare() function to vfs_mmap_prepare() and adjust
to accept a file parameter, this is useful later for nested file systems.

Finally, fix up the VMA userland tests and ensure the mmap_prepare -> mmap
shim is implemented there.

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://lore.kernel.org/8d389f4994fa736aa8f9172bef8533c10a9e9011.1750099179.git.lorenzo.stoakes@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-06-17 13:35:23 +02:00
Jani Nikula
34c55367af Merge drm/drm-next into drm-intel-next
Sync to v6.16-rc1, among other things to get the fixed size GENMASK_U*()
and BIT_U*() macros.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-06-09 12:40:46 +03:00
Linus Torvalds
b08494a8f7 drm for 6.16-rc1
new drivers:
 - bring in the asahi uapi header standalone
 - nova-drm: stub driver
 
 rust dependencies (for nova-core):
 - auxiliary
   - bus abstractions
   - driver registration
   - sample driver
 - devres changes from driver-core
 - revocable changes
 
 core:
 - add Apple fourcc modifiers
 - add virtio capset definitions
 - extend EXPORT_SYNC_FILE for timeline syncobjs
 - convert to devm_platform_ioremap_resource
 - refactor shmem helper page pinning
 - DP powerup/down link helpers
 - remove disgusting turds
 - extended %p4cc in vsprintf.c to support fourcc prints
 - change vsprintf %p4cn to %p4chR, remove %p4cn
 - Add drm_file_err function
 - IN_FORMATS_ASYNC property
 - move sitronix from tiny to their own subdir
 
 rust:
 - add drm core infrastructure rust abstractions
   (device/driver, ioctl, file, gem)
 
 dma-buf:
 - adjust sg handling to not cache map on attach
 - allow setting dma-device for import
 - Add a helper to sort and deduplicate dma_fence arrays
 
 docs:
 - updated drm scheduler docs
 - fbdev todo update
 - fb rendering
 - actual brightness
 
 ttm:
 - fix delayed destroy resv object
 
 bridge:
 - add kunit tests
 - convert tc358775 to atomic
 - convert drivers to devm_drm_bridge_alloc
 - convert rk3066_hdmi to bridge driver
 
 scheduler:
 - add kunit tests
 
 panel:
 - refcount panels to improve lifetime handling
 - Powertip PH128800T004-ZZA01
 - NLT NL13676BC25-03F, Tianma TM070JDHG34-00
 - Himax HX8279/HX8279-D DDIC
 - Visionox G2647FB105
 - Sitronix ST7571
 - ZOTAC rotation quirk
 
 vkms:
 - allow attaching more displays
 
 i915:
 - xe3lpd display updates
 - vrr refactor
 - intel_display struct conversions
 - xe2hpd memory type identification
 - add link rate/count to i915_display_info
 - cleanup VGA plane handling
 - refactor HDCP GSC
 - fix SLPC wait boosting reference counting
 - add 20ms delay to engine reset
 - fix fence release on early probe errors
 
 xe:
 - SRIOV updates
 - BMG PCI ID update
 - support separate firmware for each GT
 - SVM fix, prelim SVM multi-device work
 - export fan speed
 - temp disable d3cold on BMG
 - backup VRAM in PM notifier instead of suspend/freeze
 - update xe_ttm_access_memory to use GPU for non-visible access
 - fix guc_info debugfs for VFs
 - use copy_from_user instead of __copy_from_user
 - append PCIe gen5 limitations to xe_firmware document
 
 amdgpu:
 - DSC cleanup
 - DC Scaling updates
 - Fused I2C-over-AUX updates
 - DMUB updates
 - Use drm_file_err in amdgpu
 - Enforce isolation updates
 - Use new dma_fence helpers
 - USERQ fixes
 - Documentation updates
 - SR-IOV updates
 - RAS updates
 - PSP 12 cleanups
 - GC 9.5 updates
 - SMU 13.x updates
 - VCN / JPEG SR-IOV updates
 
 amdkfd:
 - Update error messages for SDMA
 - Userptr updates
 - XNACK fixes
 
 radeon:
 - CIK doorbell cleanup
 
 nouveau:
 - add support for NVIDIA r570 GSP firmware
 - enable Hopper/Blackwell support
 
 nova-core:
 - fix task list
 - register definition infrastructure
 - move firmware into own rust module
 - register auxiliary device for nova-drm
 
 nova-drm:
 - initial driver skeleton
 
 msm:
 - GPU:
   - ACD (adaptive clock distribution) for X1-85
   - drop fictional address_space_size
   - improve GMU HFI response time out robustness
   - fix crash when throttling during boot
 - DPU:
   - use single CTL path for flushing on DPU 5.x+
   - improve SSPP allocation code for better sharing
   - Enabled SmartDMA on SM8150, SC8180X, SC8280XP, SM8550
   - Added SAR2130P support
   - Disabled DSC support on MSM8937, MSM8917, MSM8953, SDM660
 - DP:
   - switch to new audio helpers
   - better LTTPR handling
 - DSI:
   - Added support for SA8775P
   - Added SAR2130P support
 - HDMI:
   - Switched to use new helpers for ACR data
   - Fixed old standing issue of HPD not working in some cases
 
 amdxdna:
 - add dma-buf support
 - allow empty command submits
 
 renesas:
 - add dma-buf support
 - add zpos, alpha, blend support
 
 panthor:
 - fail properly for NO_MMAP bos
 - add SET_LABEL ioctl
 - debugfs BO dumping support
 
 imagination:
 - update DT bindings
 - support TI AM68 GPU
 
 hibmc:
 - improve interrupt handling and HPD support
 
 virtio:
 - add panic handler support
 
 rockchip:
 - add RK3588 support
 - add DP AUX bus panel support
 
 ivpu:
 - add heartbeat based hangcheck
 
 mediatek:
 - prepares support for MT8195/99 HDMIv2/DDCv2
 
 anx7625:
 - improve HPD
 
 tegra:
 - speed up firmware loading
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Merge tag 'drm-next-2025-05-28' of https://gitlab.freedesktop.org/drm/kernel

Pull drm updates from Dave Airlie:
 "As part of building up nova-core/nova-drm pieces we've brought in some
  rust abstractions through this tree, aux bus being the main one, with
  devres changes also in the driver-core tree. Along with the drm core
  abstractions and enough nova-core/nova-drm to use them. This is still
  all stub work under construction, to build the nova driver upstream.

  The other big NVIDIA related one is nouveau adds support for
  Hopper/Blackwell GPUs, this required a new GSP firmware update to
  570.144, and a bunch of rework in order to support multiple fw
  interfaces.

  There is also the introduction of an asahi uapi header file as a
  precursor to getting the real driver in later, but to unblock
  userspace mesa packages while the driver is trapped behind rust
  enablement.

  Otherwise it's the usual mixture of stuff all over, amdgpu, i915/xe,
  and msm being the main ones, and some changes to vsprintf.

  new drivers:
   - bring in the asahi uapi header standalone
   - nova-drm: stub driver

  rust dependencies (for nova-core):
   - auxiliary
       - bus abstractions
       - driver registration
       - sample driver
   - devres changes from driver-core
   - revocable changes

  core:
   - add Apple fourcc modifiers
   - add virtio capset definitions
   - extend EXPORT_SYNC_FILE for timeline syncobjs
   - convert to devm_platform_ioremap_resource
   - refactor shmem helper page pinning
   - DP powerup/down link helpers
   - extended %p4cc in vsprintf.c to support fourcc prints
   - change vsprintf %p4cn to %p4chR, remove %p4cn
   - Add drm_file_err function
   - IN_FORMATS_ASYNC property
   - move sitronix from tiny to their own subdir

  rust:
   - add drm core infrastructure rust abstractions
     (device/driver, ioctl, file, gem)

  dma-buf:
   - adjust sg handling to not cache map on attach
   - allow setting dma-device for import
   - Add a helper to sort and deduplicate dma_fence arrays

  docs:
   - updated drm scheduler docs
   - fbdev todo update
   - fb rendering
   - actual brightness

  ttm:
   - fix delayed destroy resv object

  bridge:
   - add kunit tests
   - convert tc358775 to atomic
   - convert drivers to devm_drm_bridge_alloc
   - convert rk3066_hdmi to bridge driver

  scheduler:
   - add kunit tests

  panel:
   - refcount panels to improve lifetime handling
   - Powertip PH128800T004-ZZA01
   - NLT NL13676BC25-03F, Tianma TM070JDHG34-00
   - Himax HX8279/HX8279-D DDIC
   - Visionox G2647FB105
   - Sitronix ST7571
   - ZOTAC rotation quirk

  vkms:
   - allow attaching more displays

  i915:
   - xe3lpd display updates
   - vrr refactor
   - intel_display struct conversions
   - xe2hpd memory type identification
   - add link rate/count to i915_display_info
   - cleanup VGA plane handling
   - refactor HDCP GSC
   - fix SLPC wait boosting reference counting
   - add 20ms delay to engine reset
   - fix fence release on early probe errors

  xe:
   - SRIOV updates
   - BMG PCI ID update
   - support separate firmware for each GT
   - SVM fix, prelim SVM multi-device work
   - export fan speed
   - temp disable d3cold on BMG
   - backup VRAM in PM notifier instead of suspend/freeze
   - update xe_ttm_access_memory to use GPU for non-visible access
   - fix guc_info debugfs for VFs
   - use copy_from_user instead of __copy_from_user
   - append PCIe gen5 limitations to xe_firmware document

  amdgpu:
   - DSC cleanup
   - DC Scaling updates
   - Fused I2C-over-AUX updates
   - DMUB updates
   - Use drm_file_err in amdgpu
   - Enforce isolation updates
   - Use new dma_fence helpers
   - USERQ fixes
   - Documentation updates
   - SR-IOV updates
   - RAS updates
   - PSP 12 cleanups
   - GC 9.5 updates
   - SMU 13.x updates
   - VCN / JPEG SR-IOV updates

  amdkfd:
   - Update error messages for SDMA
   - Userptr updates
   - XNACK fixes

  radeon:
   - CIK doorbell cleanup

  nouveau:
   - add support for NVIDIA r570 GSP firmware
   - enable Hopper/Blackwell support

  nova-core:
   - fix task list
   - register definition infrastructure
   - move firmware into own rust module
   - register auxiliary device for nova-drm

  nova-drm:
   - initial driver skeleton

  msm:
   - GPU:
       - ACD (adaptive clock distribution) for X1-85
       - drop fictional address_space_size
       - improve GMU HFI response time out robustness
       - fix crash when throttling during boot
   - DPU:
       - use single CTL path for flushing on DPU 5.x+
       - improve SSPP allocation code for better sharing
       - Enabled SmartDMA on SM8150, SC8180X, SC8280XP, SM8550
       - Added SAR2130P support
       - Disabled DSC support on MSM8937, MSM8917, MSM8953, SDM660
   - DP:
       - switch to new audio helpers
       - better LTTPR handling
   - DSI:
       - Added support for SA8775P
       - Added SAR2130P support
   - HDMI:
       - Switched to use new helpers for ACR data
       - Fixed old standing issue of HPD not working in some cases

  amdxdna:
   - add dma-buf support
   - allow empty command submits

  renesas:
   - add dma-buf support
   - add zpos, alpha, blend support

  panthor:
   - fail properly for NO_MMAP bos
   - add SET_LABEL ioctl
   - debugfs BO dumping support

  imagination:
   - update DT bindings
   - support TI AM68 GPU

  hibmc:
   - improve interrupt handling and HPD support

  virtio:
   - add panic handler support

  rockchip:
   - add RK3588 support
   - add DP AUX bus panel support

  ivpu:
   - add heartbeat based hangcheck

  mediatek:
   - prepares support for MT8195/99 HDMIv2/DDCv2

  anx7625:
   - improve HPD

  tegra:
   - speed up firmware loading

* tag 'drm-next-2025-05-28' of https://gitlab.freedesktop.org/drm/kernel: (1627 commits)
  drm/nouveau/tegra: Fix error pointer vs NULL return in nvkm_device_tegra_resource_addr()
  drm/xe: Default auto_link_downgrade status to false
  drm/xe/guc: Make creation of SLPC debugfs files conditional
  drm/i915/display: Add check for alloc_ordered_workqueue() and alloc_workqueue()
  drm/i915/dp_mst: Work around Thunderbolt sink disconnect after SINK_COUNT_ESI read
  drm/i915/ptl: Use everywhere the correct DDI port clock select mask
  drm/nouveau/kms: add support for GB20x
  drm/dp: add option to disable zero sized address only transactions.
  drm/nouveau: add support for GB20x
  drm/nouveau/gsp: add hal for fifo.chan.doorbell_handle
  drm/nouveau: add support for GB10x
  drm/nouveau/gf100-: track chan progress with non-WFI semaphore release
  drm/nouveau/nv50-: separate CHANNEL_GPFIFO handling out from CHANNEL_DMA
  drm/nouveau: add helper functions for allocating pinned/cpu-mapped bos
  drm/nouveau: add support for GH100
  drm/nouveau: improve handling of 64-bit BARs
  drm/nouveau/gv100-: switch to volta semaphore methods
  drm/nouveau/gsp: support deeper page tables in COPY_SERVER_RESERVED_PDES
  drm/nouveau/gsp: init client VMMs with NV0080_CTRL_DMA_SET_PAGE_DIRECTORY
  drm/nouveau/gsp: fetch level shift and PDE from BAR2 VMM
  ...
2025-05-28 09:46:39 -07:00
Joonas Lahtinen
bbfd559475 Merge drm/drm-next into drm-intel-gt-next
Need to pull in a67221b5eb ("drm/i915/dp: Return min bpc supported by source instead of 0")
in order to fix build breakage on GCC 9.4.0 (from Ubuntu 20.04).

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2025-05-28 10:20:17 +03:00
Joonas Lahtinen
d2dc30e0aa Revert "drm/i915/gem: Allow EXEC_CAPTURE on recoverable contexts on DG1"
This reverts commit d6e0208196.

The IS_DGFX check was put in place because error capture of buffer
objects is expected to be broken on devices with VRAM.

Userspace fix[1] to the impacted media driver has been submitted, merged
and a new driver release is out as 25.2.3 where the capture flag is
dropped on DG1 thus unblocking the usage of media driver on DG1.

[1] 93c07d9b4b

Cc: stable@vger.kernel.org # v6.0+
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Tvrtko Ursulin <tursulin@ursulin.net>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://lore.kernel.org/r/20250522064127.24293-1-joonas.lahtinen@linux.intel.com
[Joonas: Update message to point out the merged userspace fix]
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2025-05-27 13:53:17 +03:00
Jani Nikula
62384da2a0 drm/i915: stop including display/intel_display_{core, limits}.h from i915_drv.h
Make i915->display pointer opaque to most of core i915 driver. Lots of
places now need explicit include of intel_display_core.h, or a more
specific header.

With this dependency broken, changes in display should cause radically
less recompilation of i915.

Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Link: https://lore.kernel.org/r/b381b59acb7e4f600e0282935a68aedf77768109.1747907216.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-27 11:25:53 +03:00
Jani Nikula
96b451d53a drm/{i915,xe}: convert i915 and xe display members into pointers
As the first step towards making struct intel_display an opaque pointer
in i915 and xe drivers, convert the struct drm_i915_private and struct
xe_device display members into pointers.

Initially, add temporary struct intel_display __display members, and
point display at it to avoid dynamic allocation. In the future, we can
drop this, and switch to dynamic allocation.

The conversion is done simply with sed:

sed -i 's/&\([a-zA-Z0-9_>.-]*\)\(dev_priv\|i915\|xe\)->display\([^.]\)/\1\2->display\3/g' \
    $(git ls-files -- drivers/gpu/drm/i915 drivers/gpu/drm/xe)

sed -i 's/\(dev_priv\|i915\|xe\)->display\./\1->display->/g' \
    $(git ls-files -- drivers/gpu/drm/i915 drivers/gpu/drm/xe)

With a couple of manual tweaks on top.

v2: Initialize i915->display also in selftest mock_gem_device()

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20250507152254.2398934-1-jani.nikula@intel.com
2025-05-16 11:15:16 +03:00
Jani Nikula
db5302ae57 Merge drm/drm-next into drm-intel-next
Backmerge to sync with v6.15-rc, xe, and specifically async flip changes
in drm-misc.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-16 10:22:36 +03:00
Ville Syrjälä
d6e0208196 drm/i915/gem: Allow EXEC_CAPTURE on recoverable contexts on DG1
The intel-media-driver is currently broken on DG1 because
it uses EXEC_CAPTURE with recovarable contexts. Relax the
check to allow that.

I've also submitted a fix for the intel-media-driver:
https://github.com/intel/media-driver/pull/1920

Cc: stable@vger.kernel.org # v6.0+
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Testcase: igt/gem_exec_capture/capture-invisible
Fixes: 71b1669ea9 ("drm/i915/uapi: tweak error capture on recoverable contexts")
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20250411144313.11660-2-ville.syrjala@linux.intel.com
2025-05-15 16:48:54 +02:00
Jani Nikula
a1216d84f1 drm/i915/gem: drop intel_display.h include
The include is not needed since commit 44a34dec43 ("drm/i915:
Calculate the VT-d guard size in the display code").

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://lore.kernel.org/r/80ea203e004b7378c14f2367258b5785e40bf126.1747128495.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-14 14:10:07 +03:00
Tvrtko Ursulin
16fa6b8999 drm/i915: Use provided dma_fence_is_chain
Replace open-coded helper with the subsystem one.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
Link: https://lore.kernel.org/r/20250512072047.56851-1-tvrtko.ursulin@igalia.com
2025-05-13 09:26:18 +01:00
Dave Airlie
8d782ad650 Merge tag 'drm-intel-gt-next-2025-05-08-1' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next
Driver Changes:

- Fix SLPC wait boosting reference counting to avoid getting stuck on non-boost
  frequency on power saving profile on DG1/DG2 (Vinay)
- Add 20ms delay to engine reset for robustness on HSW (Nitin)

- Use proper sleeping functions for timeouts shorter than 20ms (Andi)
- Fix fence not released on early probe errors for HuC (Janusz)

- Remove const from struct i915_wa list allocation (Kees)
- Apply SPDX license format where missing and use single-line format (Andi)
- Whitespace fixes (Dan, Andi)
- Selftest improvements (Mikolaj, Badal, Sk,

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://lore.kernel.org/r/aBxNYp0IviE23zy-@jlahtine-mobl
2025-05-09 11:39:27 +10:00
Dave Airlie
b60301774a Cross-subsystem Changes:
- Update GVT MAINTAINERS (Jani)
 
 Driver Changes:
 - Updates for xe3lpd display (Gustavo)
 - Fix link training interrupted by HPD pulse (Imre)
 - Watermark bound checks for DSC (Ankit)
 - VRR Refactor and other fixes and improvements (Ankit)
 - More conversions towards intel_display struct (Gustavo, Jani)
 - Other clean-up patches towards a display separation (Jani)
 - Maintain asciibetical order for HAS_* macros (Ankit)
 - Fixes around probe/initialization (Janusz)
 - Fix build and doc build issue (Yue, Rodrigo)
 - DSI related fixes (Suraj, William, Jani)
 - Improve DC6 entry counter (Mohammed)
 - Fix xe2hpd memory type identification (Vivek)
 - PSR related fixes and improvements (Animesh, Jouni)
 - DP MST related fixes and improvements (Imre)
 - Fix scanline_offset for LNL+/BMG+ (Ville)
 - Some gvt related fixes and changes (Ville, Jani)
 - Some PLL code adjustment (Ville)
 - Display wa addition (Vinod)
 - DRAM type logging (Lucas)
 - Pimp the initial FB readout (Ville)
 - Some sagv/bw cleanup (Ville)
 - Remove i915_display_capabilities debugfs entry (Jani)
 - Move PCH type to display caps debugfs entry (Jani)
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Merge tag 'drm-intel-next-2025-04-11' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next

Cross-subsystem Changes:
- Update GVT MAINTAINERS (Jani)

Driver Changes:
- Updates for xe3lpd display (Gustavo)
- Fix link training interrupted by HPD pulse (Imre)
- Watermark bound checks for DSC (Ankit)
- VRR Refactor and other fixes and improvements (Ankit)
- More conversions towards intel_display struct (Gustavo, Jani)
- Other clean-up patches towards a display separation (Jani)
- Maintain asciibetical order for HAS_* macros (Ankit)
- Fixes around probe/initialization (Janusz)
- Fix build and doc build issue (Yue, Rodrigo)
- DSI related fixes (Suraj, William, Jani)
- Improve DC6 entry counter (Mohammed)
- Fix xe2hpd memory type identification (Vivek)
- PSR related fixes and improvements (Animesh, Jouni)
- DP MST related fixes and improvements (Imre)
- Fix scanline_offset for LNL+/BMG+ (Ville)
- Some gvt related fixes and changes (Ville, Jani)
- Some PLL code adjustment (Ville)
- Display wa addition (Vinod)
- DRAM type logging (Lucas)
- Pimp the initial FB readout (Ville)
- Some sagv/bw cleanup (Ville)
- Remove i915_display_capabilities debugfs entry (Jani)
- Move PCH type to display caps debugfs entry (Jani)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://lore.kernel.org/r/Z_kTqPX5Mjruq1pL@intel.com
2025-04-15 05:06:51 +10:00
Matthew Wilcox (Oracle)
776a853a43
i915: Use writeback_iter()
Convert from an inefficient loop to the standard writeback iterator.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250402150005.2309458-7-willy@infradead.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-07 09:36:49 +02:00
Ville Syrjälä
33b3c4791e drm/i915: Extract intel_memory_type_is_local()
Extract the "is this memory region local?" check into a helper.
I'll have another use for this in the BIOS FB takeover.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250313140838.29742-2-ville.syrjala@linux.intel.com
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
2025-04-02 02:15:26 +03:00
Andi Shyti
4e22d5b8ba drm/i915/gem: Convert SPDX headers to single-line format
Replace multi-line SPDX license headers with single-line
equivalents (// SPDX-License-Identifier: MIT or /* ... */ for
headers), as preferred by current kernel coding style.

Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Nitin Gote <nitin.r.gote@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Mikołaj Wasiak <mikolaj.wasiak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250327232629.2939-1-andi.shyti@linux.intel.com
2025-03-31 14:18:13 +02:00
Dave Airlie
cf05922d63 Merge tag 'drm-intel-gt-next-2025-03-12' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next
UAPI Changes:

- Increase I915_PARAM_MMAP_GTT_VERSION version to indicate support for partial mmaps (José Roberto de Souza)

Driver Changes:

Fixes/improvements/new stuff:

- Implement vmap/vunmap GEM object functions (Asbjørn Sloth Tønnesen)

Miscellaneous:

- Various register definition cleanups (Ville Syrjälä)
- Fix typo in a comment [gt/uc] (Yuichiro Tsuji)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tursulin@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Z9IXs5CzHHKScuQn@linux
2025-03-25 08:21:07 +10:00
Mikolaj Wasiak
34b1c1c71d i915/selftest/igt_mmap: let mmap tests run in kthread
When the driver is loaded on the system with numa nodes it might be run in
a kthread, which makes it impossible to use current->mm in the selftest.
This patch allows the selftest to use current->mm by using active_mm.

Signed-off-by: Mikolaj Wasiak <mikolaj.wasiak@intel.com>
Reviewed-by: Eugene Kobyak <eugene.kobyak@intel.com>
Reviewed-by: Krzysztof Niemiec <krzysztof.niemiec@intel.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/2w6pt2hnemndwmanwhyn3keexa6vtha7rmo6rqoerkmyxhbrh2@ls7lndjpia6z
2025-03-14 15:30:31 +01:00
Dave Airlie
d115a38f3c Merge tag 'drm-intel-gt-next-2025-02-26' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next
UAPI Changes:

- Add sysfs for SLPC power profiles [slpc] (Vinay Belgaumkar)

Driver Changes:

Fixes/improvements/new stuff:

- Fix zero delta busyness issue [pmu] (Umesh Nerlige Ramappa)
- Fix page cleanup on DMA remap failure (Brian Geffon)
- Debug print LRC state entries only if the context is pinned [guc] (Daniele Ceraolo Spurio)
- Drop custom hotplug code [pmu] (Lucas De Marchi)
- Use spin_lock_irqsave() in interruptible context [guc] (Krzysztof Karas)
- Add wait on depth stall done bit handling [gen12] (Juha-Pekka Heikkila)

Miscellaneous:

- Change throttle criteria for rps [selftest] (Raag Jadav)
- Add debug print about hw config table size (John Harrison)
- Include requested frequency in slow firmware load messages [uc] (John Harrison)
- Remove i915_pmu_event_event_idx() [pmu] (Lucas De Marchi)
- Remove unused live_context_for_engine (Dr. David Alan Gilbert)
- Add Wa_22010465259 in its respective WA list (Ranu Maurya)
- Correct frequency handling in RPS power measurement [selftests] (Sk Anirban)
- Add helper function slpc_measure_power [guc/slpc] (Sk Anirban)
- Revert "drm/i915/gt: Log reason for setting TAINT_WARN at reset" [gt] (Sebastian Brzezinka)
- Avoid using uninitialized context [selftests] (Krzysztof Karas)
- Use struct_size() helper in kmalloc() (luoqing)
- Use prandom in selftest [selftests] (Markus Theil)
- Replace kmap with its safer kmap_local_page counterpart [gt] (Andi Shyti)

Merges:

- Merge drm/drm-next into drm-intel-gt-next (Tvrtko Ursulin)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tursulin@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Z77NLt2mR7SqxJ4u@linux
2025-03-13 07:54:41 +10:00
José Roberto de Souza
bfef148f36 drm/i915: Increase I915_PARAM_MMAP_GTT_VERSION version to indicate support for partial mmaps
Commit 255fc1703e ("drm/i915/gem: Calculate object page offset for partial memory mapping")
was the last patch of several patches fixing multiple partial mmaps.
But without a bump in I915_PARAM_MMAP_GTT_VERSION there is no clean
way for UMD to know if it can do multiple partial mmaps.

Fixes: 255fc1703e ("drm/i915/gem: Calculate object page offset for partial memory mapping")
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Nirmoy Das <nirmoy.das@intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250306210827.171147-1-jose.souza@intel.com
2025-03-11 07:04:51 -07:00
Asbjørn Sloth Tønnesen
d0efbe85e1 drm/i915: implement vmap/vunmap GEM object functions
Implement i915_gem_vmap_object() and i915_gem_vunmap_object(),
based on i915_gem_dmabuf_vmap() and i915_gem_dmabuf_vunmap().

This enables a drm_client to use drm_client_buffer_vmap() and
drm_client_buffer_vunmap() on hardware using the i915 driver.

Tested with a currently out of tree pixelflut drm_client[1] on:
- Lenovo ThinkCentre M720q (CoffeeLake-S GT2 / Intel UHD Graphics 630)
- Dell Wyse N06D - 3030 LT (ValleyView on Intel Celeron N2807 SOC)

[1] XDP->DRM pixelflut: https://labitat.dk/wiki/Pixelflut-XDR

Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@asbjorn.st>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240629182513.78026-1-asbjorn@asbjorn.st
2025-03-05 22:13:30 +01:00
Jani Nikula
fe7fad476e drm/i915/pxp & drm/xe/pxp: Figure out pxp instance from the gem object
It's undesirable to have to figure out the pxp pointer in display
code. For one thing, its type is different for i915 and xe.

Since we can figure the pxp pointer out in the pxp code from the gem
object, offload it there.

v2: Rebase

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250228114527.3091620-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-03-03 12:16:04 +02:00
Dave Airlie
16893dd23f Merge tag 'drm-intel-next-2025-02-24' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next
drm/i915 feature pull for v6.15:

Features and functionality:
- Enable DP 128b/132b SST DSC (Jani, Imre)
- Allow DSB to perform commits when VRR is enabled (Ville)
- Compute HDMI PLLs for SNPS/C10 PHYs for rates not in fixed tables (Ankit)
- Allow DSB usage when PSR is enabled on LNL+ (Jouni)
- Enable Panel Replay mode change without full modeset (Jouni)
- Enable async flips with compressed buffers on ICL+ (Ville)
- Support luminance based brightness control via DPCD for eDP (Suraj)
- Enable VRR enable/disable without full modeset (Mitul, Ankit)
- Add debugfs facility for force testing HDCP 1.4 (Suraj)
- Add scaler tracepoints, improve plane tracepoints (Ville)
- Improve DMC wakelock debugging facilities (Gustavo)
- Allow GuC SLPC default strategies on MTL+ for performance (Rodrigo)
- Provide more information on display faults (Ville)

Refactoring and cleanups:
- Continue conversions to struct intel_display (Ville, Jani, Suraj, Imre)
- Joiner and Y plane reorganization (Ville)
- Move HDCP debugfs to intel_hdcp.c (Jani)
- Clean up and unify LSPCON interfaces (Jani)
- Move code out of intel_display.c to reduce its size (Ville)
- Clean up and simplify DDI port enabling/disabling (Imre)
- Make LPT LP a dedicated PCH type, refactor (Jani)
- Simplify DSC range BPG offset calculation (Ankit)
- Scaler cleanups (Ville)
- Remove unused code from GVT (David Alan Gilbert)
- Improve plane debugging (Ville)
- DSB and VRR refactoring (Ville)

Fixes:
- Check if vblank is sufficient for DSC prefill and scaler (Mitul)
- Fix Mesa clear color alignment regression (Ville)
- Add missing TC DP PHY lane stagger delay (Imre)
- Fix DSB + VRR usage for PTL+ (Ville)
- Improve robustness of display VT-d workarounds (Ville)
- Fix platforms for dbuf tracker state service programming (Ravi)
- Fix DMC wakelock support conditions (Gustavo)
- Amend DMC wakelock register ranges (Gustavo)
- Disable the Common Primary Timing Generator (CMTG) (Gustavo)
- Enable C20 PHY SSC (Suraj)
- Add workaround for DKL PHY DP mode write (Nemesa)
- Fix build warnings on clamp() usage (Guenter Roeck, Ankit)
- Fix error handling while adding a connector (Imre)
- Avoid full modeset at probe on vblank delay mismatches (Ville)
- Fix encoder HDMI check for HDCP line rekeying (Suraj)
- Fix HDCP repeater authentication during topology change (Suraj)
- Handle display PHY power state reset for power savings (Mika)
- Fix typos all over the place (Nitin)
- Update HDMI TMDS C20 parameters for various platforms (Dnyaneshwar)
- Guarantee a minimum hblank time for 128b/132b and 8b/10b MST (Arun, Imre)
- Do not hardcode LSPCON settle timeout (Giedrius Statkevičius)

Xe driver changes:
- Re-use display vmas when possible (Maarten)
- Remove double pageflip (Maarten)
- Enable DP tunneling (Imre)
- Separate i915 and xe tracepoints (Ville)

DRM core changes:
- Increase DPCD eDP display control CAP size to 5 bytes (Suraj)
- Add DPCD eDP version 1.5 definition (Suraj)
- Add timeout parameter to drm_lspcon_set_mode() (Giedrius Statkevičius)

Merges:
- Backmerge drm-next (Jani)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87h64j7b7n.fsf@intel.com
2025-02-27 07:13:41 +10:00
luoqing
fc2ef5b6e1 selftests: i915: Use struct_size() helper in kmalloc()
Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worst scenario, could lead to heap overflows.

Signed-off-by: luoqing <luoqing@kylinos.cn>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250208013539.3586855-1-l1138897701@163.com
2025-02-11 00:26:02 +01:00
Ville Syrjälä
2bb9476795 drm/i915: Decouple i915_gem_dumb_create() from the display a bit
Pass the device argument as drm_device to intel_plane_fb_max_stride()
to decouple i915_gem_dumb_create() vs. the display code a bit.

xe currently doesn't even call this, but it probably should...

v2: s/dev/drm/ (Jani)

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250206185533.32306-3-ville.syrjala@linux.intel.com
2025-02-10 22:59:27 +02:00
Ville Syrjälä
44a34dec43 drm/i915: Calculate the VT-d guard size in the display code
Currently i915_gem_object_pin_to_display_plane() uses
i915_gem_object_get_tile_row_size() to calculate the tile row
size for the VT-d guard w/a. That's not really proper since
i915_gem_object_get_tile_row_size() only works for fenced BOs,
nor does it take rotation into account.

Remedy the situation by calculating the VT-d guard size in the
display code where we have more information readily available.
Although the default guard size (168 PTEs now) should cover
the more typical fb size use cases anyway, and only very large
Y/Yf-tiled framebuffers might have tile row size that exceeds it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250122151755.6928-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2025-02-06 15:35:44 +02:00
Jani Nikula
ea9f8f2b21 Merge drm/drm-next into drm-intel-next
Sync with v6.14-rc1.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-02-05 19:12:37 +02:00
Tvrtko Ursulin
c771600c6a Merge drm/drm-next into drm-intel-gt-next
We need
4ba4f1afb6 ("perf: Generic hotplug support for a PMU with a scope")
in order to land a i915 PMU simplification and a fix. That landed in 6.12
and we are stuck at 6.9 so lets bump things forward.

Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
2025-02-05 09:29:14 +00:00
Brian Geffon
fa6182c8b1
drm/i915: Fix page cleanup on DMA remap failure
When converting to folios the cleanup path of shmem_get_pages() was
missed. When a DMA remap fails and the max segment size is greater than
PAGE_SIZE it will attempt to retry the remap with a PAGE_SIZEd segment
size. The cleanup code isn't properly using the folio apis and as a
result isn't handling compound pages correctly.

v2 -> v3:
(Ville) Just use shmem_sg_free_table() as-is in the failure path of
shmem_get_pages(). shmem_sg_free_table() will clear mapping unevictable
but it will be reset when it retries in shmem_sg_alloc_table().

v1 -> v2:
(Ville) Fixed locations where we were not clearing mapping unevictable.

Cc: stable@vger.kernel.org
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Vidya Srinivas <vidya.srinivas@intel.com>
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13487
Link: https://lore.kernel.org/lkml/20250116135636.410164-1-bgeffon@google.com/
Fixes: 0b62af28f2 ("i915: convert shmem_sg_free_table() to use a folio_batch")
Signed-off-by: Brian Geffon <bgeffon@google.com>
Suggested-by: Tomasz Figa <tfiga@google.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250127204332.336665-1-bgeffon@google.com
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Tested-by: Vidya Srinivas <vidya.srinivas@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
(cherry picked from commit 9e304a1863)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2025-02-03 09:26:49 -05:00
Brian Geffon
9e304a1863 drm/i915: Fix page cleanup on DMA remap failure
When converting to folios the cleanup path of shmem_get_pages() was
missed. When a DMA remap fails and the max segment size is greater than
PAGE_SIZE it will attempt to retry the remap with a PAGE_SIZEd segment
size. The cleanup code isn't properly using the folio apis and as a
result isn't handling compound pages correctly.

v2 -> v3:
(Ville) Just use shmem_sg_free_table() as-is in the failure path of
shmem_get_pages(). shmem_sg_free_table() will clear mapping unevictable
but it will be reset when it retries in shmem_sg_alloc_table().

v1 -> v2:
(Ville) Fixed locations where we were not clearing mapping unevictable.

Cc: stable@vger.kernel.org
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Vidya Srinivas <vidya.srinivas@intel.com>
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13487
Link: https://lore.kernel.org/lkml/20250116135636.410164-1-bgeffon@google.com/
Fixes: 0b62af28f2 ("i915: convert shmem_sg_free_table() to use a folio_batch")
Signed-off-by: Brian Geffon <bgeffon@google.com>
Suggested-by: Tomasz Figa <tfiga@google.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250127204332.336665-1-bgeffon@google.com
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Tested-by: Vidya Srinivas <vidya.srinivas@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
2025-01-28 18:01:16 +02:00
Dr. David Alan Gilbert
93b69c0482
drm/i915: Remove unused live_context_for_engine
The last use of live_context_for_engine() was removed in 2021 by
commit 99919be74a ("drm/i915/gem: Zap the i915_gem_object_blt code")

Remove it.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250125003846.228514-1-linux@treblig.org
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2025-01-27 14:10:18 -05:00
Nitin Gote
54296aa4cf
drm/i915/gem: fix typos in i915/gem files
Fix all typos in files under drm/i915/gem reported by codespell tool.

v2: Codespell won't catch it, but it should be
    "user defined" and not "use defined". <Krzysztof Niemiec>

Signed-off-by: Nitin Gote <nitin.r.gote@intel.com>
Reviewed-by: Krzysztof Niemiec <krzysztof.niemiec@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250120081517.3237326-4-nitin.r.gote@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2025-01-23 05:48:23 -05:00
Linus Torvalds
1d6d399223 Kthreads affinity follow either of 4 existing different patterns:
1) Per-CPU kthreads must stay affine to a single CPU and never execute
    relevant code on any other CPU. This is currently handled by smpboot
    code which takes care of CPU-hotplug operations. Affinity here is
    a correctness constraint.
 
 2) Some kthreads _have_ to be affine to a specific set of CPUs and can't
    run anywhere else. The affinity is set through kthread_bind_mask()
    and the subsystem takes care by itself to handle CPU-hotplug
    operations. Affinity here is assumed to be a correctness constraint.
 
 3) Per-node kthreads _prefer_ to be affine to a specific NUMA node. This
    is not a correctness constraint but merely a preference in terms of
    memory locality. kswapd and kcompactd both fall into this category.
    The affinity is set manually like for any other task and CPU-hotplug
    is supposed to be handled by the relevant subsystem so that the task
    is properly reaffined whenever a given CPU from the node comes up.
    Also care should be taken so that the node affinity doesn't cross
    isolated (nohz_full) cpumask boundaries.
 
 4) Similar to the previous point except kthreads have a _preferred_
    affinity different than a node. Both RCU boost kthreads and RCU
    exp kworkers fall into this category as they refer to "RCU nodes"
    from a distinctly distributed tree.
 
 Currently the preferred affinity patterns (3 and 4) have at least 4
 identified users, with more or less success when it comes to handle
 CPU-hotplug operations and CPU isolation. Each of which do it in its own
 ad-hoc way.
 
 This is an infrastructure proposal to handle this with the following API
 changes:
 
 _ kthread_create_on_node() automatically affines the created kthread to
   its target node unless it has been set as per-cpu or bound with
   kthread_bind[_mask]() before the first wake-up.
 
 - kthread_affine_preferred() is a new function that can be called right
   after kthread_create_on_node() to specify a preferred affinity
   different than the specified node.
 
 When the preferred affinity can't be applied because the possible
 targets are offline or isolated (nohz_full), the kthread is affine
 to the housekeeping CPUs (which means to all online CPUs most of the
 time or only the non-nohz_full CPUs when nohz_full= is set).
 
 kswapd, kcompactd, RCU boost kthreads and RCU exp kworkers have been
 converted, along with a few old drivers.
 
 Summary of the changes:
 
 * Consolidate a bunch of ad-hoc implementations of kthread_run_on_cpu()
 
 * Introduce task_cpu_fallback_mask() that defines the default last
   resort affinity of a task to become nohz_full aware
 
 * Add some correctness check to ensure kthread_bind() is always called
   before the first kthread wake up.
 
 * Default affine kthread to its preferred node.
 
 * Convert kswapd / kcompactd and remove their halfway working ad-hoc
   affinity implementation
 
 * Implement kthreads preferred affinity
 
 * Unify kthread worker and kthread API's style
 
 * Convert RCU kthreads to the new API and remove the ad-hoc affinity
   implementation.
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Merge tag 'kthread-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks

Pull kthread updates from Frederic Weisbecker:
 "Kthreads affinity follow either of 4 existing different patterns:

   1) Per-CPU kthreads must stay affine to a single CPU and never
      execute relevant code on any other CPU. This is currently handled
      by smpboot code which takes care of CPU-hotplug operations.
      Affinity here is a correctness constraint.

   2) Some kthreads _have_ to be affine to a specific set of CPUs and
      can't run anywhere else. The affinity is set through
      kthread_bind_mask() and the subsystem takes care by itself to
      handle CPU-hotplug operations. Affinity here is assumed to be a
      correctness constraint.

   3) Per-node kthreads _prefer_ to be affine to a specific NUMA node.
      This is not a correctness constraint but merely a preference in
      terms of memory locality. kswapd and kcompactd both fall into this
      category. The affinity is set manually like for any other task and
      CPU-hotplug is supposed to be handled by the relevant subsystem so
      that the task is properly reaffined whenever a given CPU from the
      node comes up. Also care should be taken so that the node affinity
      doesn't cross isolated (nohz_full) cpumask boundaries.

   4) Similar to the previous point except kthreads have a _preferred_
      affinity different than a node. Both RCU boost kthreads and RCU
      exp kworkers fall into this category as they refer to "RCU nodes"
      from a distinctly distributed tree.

  Currently the preferred affinity patterns (3 and 4) have at least 4
  identified users, with more or less success when it comes to handle
  CPU-hotplug operations and CPU isolation. Each of which do it in its
  own ad-hoc way.

  This is an infrastructure proposal to handle this with the following
  API changes:

   - kthread_create_on_node() automatically affines the created kthread
     to its target node unless it has been set as per-cpu or bound with
     kthread_bind[_mask]() before the first wake-up.

   - kthread_affine_preferred() is a new function that can be called
     right after kthread_create_on_node() to specify a preferred
     affinity different than the specified node.

  When the preferred affinity can't be applied because the possible
  targets are offline or isolated (nohz_full), the kthread is affine to
  the housekeeping CPUs (which means to all online CPUs most of the time
  or only the non-nohz_full CPUs when nohz_full= is set).

  kswapd, kcompactd, RCU boost kthreads and RCU exp kworkers have been
  converted, along with a few old drivers.

  Summary of the changes:

   - Consolidate a bunch of ad-hoc implementations of
     kthread_run_on_cpu()

   - Introduce task_cpu_fallback_mask() that defines the default last
     resort affinity of a task to become nohz_full aware

   - Add some correctness check to ensure kthread_bind() is always
     called before the first kthread wake up.

   - Default affine kthread to its preferred node.

   - Convert kswapd / kcompactd and remove their halfway working ad-hoc
     affinity implementation

   - Implement kthreads preferred affinity

   - Unify kthread worker and kthread API's style

   - Convert RCU kthreads to the new API and remove the ad-hoc affinity
     implementation"

* tag 'kthread-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks:
  kthread: modify kernel-doc function name to match code
  rcu: Use kthread preferred affinity for RCU exp kworkers
  treewide: Introduce kthread_run_worker[_on_cpu]()
  kthread: Unify kthread_create_on_cpu() and kthread_create_worker_on_cpu() automatic format
  rcu: Use kthread preferred affinity for RCU boost
  kthread: Implement preferred affinity
  mm: Create/affine kswapd to its preferred node
  mm: Create/affine kcompactd to its preferred node
  kthread: Default affine kthread to its preferred NUMA node
  kthread: Make sure kthread hasn't started while binding it
  sched,arm64: Handle CPU isolation on last resort fallback rq selection
  arm64: Exclude nohz_full CPUs from 32bits el0 support
  lib: test_objpool: Use kthread_run_on_cpu()
  kallsyms: Use kthread_run_on_cpu()
  soc/qman: test: Use kthread_run_on_cpu()
  arm/bL_switcher: Use kthread_run_on_cpu()
2025-01-21 17:10:05 -08:00
Dave Airlie
255e094a30 Merge tag 'drm-intel-gt-next-2025-01-10' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next
Driver Changes:

- More robust engine resets on Haswell and older (Nitin)

- Dead code removal (David)
- Selftest, logging and tracing improvements (Sk, Nitin, Sebastian,
  Apoorva)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Z4DidoEACFu7D6iG@jlahtine-mobl.ger.corp.intel.com
2025-01-13 08:05:00 +10:00
Frederic Weisbecker
b04e317b52 treewide: Introduce kthread_run_worker[_on_cpu]()
kthread_create() creates a kthread without running it yet. kthread_run()
creates a kthread and runs it.

On the other hand, kthread_create_worker() creates a kthread worker and
runs it.

This difference in behaviours is confusing. Also there is no way to
create a kthread worker and affine it using kthread_bind_mask() or
kthread_affine_preferred() before starting it.

Consolidate the behaviours and introduce kthread_run_worker[_on_cpu]()
that behaves just like kthread_run(). kthread_create_worker[_on_cpu]()
will now only create a kthread worker without starting it.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
2025-01-08 18:15:03 +01:00