kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-13 07:31:07 +00:00
Code Issues Releases Packages Activity
1,480,615 commits 117 branches 5,827 tags 6.3 GiB
Commit graph

55,457 commits

Author SHA1 Message Date
Linus Torvalds
18fbf5151d mm.git review status for linus..mm-stable 
Everything:
 
 Total patches:       171
 Reviews/patch:       1.83
 Reviewed rate:       82%
 
 Excluding selftests:
 
 Total patches:       149
 Reviews/patch:       1.77
 Reviewed rate:       80%
 
 Excluding selftests and maple_tree:
 
 Total patches:       129
 Reviews/patch:       1.99
 Reviewed rate:       89%
 
 Summary of patch series in this merge:
 
 - "mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff"
   (Lorenzo Stoakes):
 
   Index MAP_PRIVATE file-backed folios by their anonymous page offset to
   resolve confusion around reverse mapping for zeroed and CoW'd
   file-backed memory.
 
   Use this new VMA anonymous page offset tracking to eliminate index
   conflicts and lay the foundation for scalable CoW performance
   improvements.
 
 - "promote mapped executable folios after first usage for MGLRU" (Baolin
   Wang):
 
   Make MGLRU's protection of mapped executable file folios more
   reliable.  Follow the classical LRU's logic, promoting mapped executable
   file folios after their first usage to give executable code a better
   chance to stay in memory and improve workload performance.
 
 - "mm: vmscan: fix node reclaim ignoring swappiness parameter" (Ridong Chen):
 
   Fix per-node proactive reclaim interface's ignoring the swappiness
   parameter when CONFIG_MEMCG is disabled by consolidating sc_swappiness()
   into a single function that checks proactive_swappiness regardless of
   kernel configuration.
 
 - "mm/vmscan: reduce lru_lock contention via vmstat-derived scan-balance
   cost" (Usama Arif):
 
   Reduce lru_lock contention in the reclaim path by deriving
   scan-balance costs from vmstat counters rather than lock-acquired
   producer updates.
 
   Read and decay these cost signals on the reclaim side under a
   dedicated per-lruvec lock, reducing total LRU lock wait time by over 60%
   without impacting scan throughput.
 
 - "zram: fix zram issues reported by sashiko" (Sergey Senozhatsky):
 
   Fix two low-risk zram bugs which Sashiko spotted in drive-by review.
 
 - "Honor XA_FLAGS_ACCOUNT in xas_split_alloc() and charge to folio's
   memcg" (Zi Yan):
 
   Fix xas_split_alloc() by enabling target folio memcg charging during
   splits and adding the missing __GFP_ACCOUNT flag for proper XArray node
   memory accounting.
 
 - "selftests/mm: use pattern matching in .gitignore" (Pratyush Mallick):
 
   Replace hardcoded binary names in selftests/mm/.gitignore with a
   generic pattern-matching rule to automatically ignore generated test
   files and avoid manual updates when adding new tests.
 
 - "mm/page_ext: remove pgdat_page_ext_init()" (Sang-Heon Jeon):
 
   Make the incompatibility between FLATMEM and NUMA explicit in
   mm/Kconfig and remove the unused pgdat_page_ext_init() function.
 
 - "zram: fix zstd error paths and add parameter validation" (Haoqin Huang):
 
   Clean up zram compression backends by removing redundant error
   cleanup, adding parameter and dictionary validation, auto-prefixing
   algorithm error logs, and resetting parameters prior to
   reinitialization.
 
 - "zram: fix stale scan bounds after reinitialization" (Longlong Xia):
 
   Prevent out-of-bounds slot accesses during concurrent zram resets by
   moving table scan bound calculations under dev_lock in writeback_store()
   and read_block_state().
 
 - "add anon mTHP collapse test cases" (Baolin Wang):
 
   Extend selftests helper functions to support arbitrary page orders and
   add new test cases and options for mTHP collapse in khugepaged.
 
 - "selftests/mm: Handle unsupported and transient test conditions"
   (Muhammad Usama Anjum):
 
   Update MM selftests to report a SKIP status instead of a failure when
   required kernel or filesystem features are unsupported, while adding
   retry logic for transient page migration errors.
 
 - "mm/zswap: Fixes and improves the zswap shrink" (Hao Jia):
 
   Fix the missing zswap global shrinker when CONFIG_MEMCG is disabled
   and extend shrink_memcg() to support batch writeback for improved
   writeback efficiency.
 
 - "alloc_tag: introduce IOCTL-based filtering for MAP" (Suren Baghdasaryan):
 
   Introduce an IOCTL-based binary interface for memory allocation
   profiling that enables kernel-side filtering before per-CPU counter
   aggregation.
 
   This eliminates the text-parsing overhead of /proc/allocinfo and
   provides up to a 20x speedup by transferring only filtered allocation
   data to userspace.
 
 - "better block swap batching and a different take on swap_ops v5"
   (Christoph Hellwig):
 
   Refactor block swap I/O to use swap_iocb for batching instead of
   single-bio requests and rebase the swap_ops interface, achieving faster
   swap throughput during kernel builds.
 
 - "mm: kmemleak: reduce transient false positives by confirming leaks"
   (Catalin Marinas):
 
   Reduce false-positive kmemleak reports by combining two kmemleak
   enhancements that add a second confirmation scan and a configurable
   minimum unreferenced scan count module parameter.
 
 - "mm: kmemleak: default min_unref_scans to 2 for verbose kernels"
   (Breno Leitao):
 
   Auto-scanning kernels can generate false-positive memory leak reports
   on single scans, so this patch defaults min_unref_scans to 2 when
   CONFIG_DEBUG_KMEMLEAK_VERBOSE is enabled to require a second confirming
   scan.
 
 - "swap_ops updates" (Christoph Hellwig):
 
   Batching I/O for synchronous swap devices causes performance
   regressions and filesystem-based swap suffers from double-indirection
   overhead.  This series resolves both issues by reintroducing per-folio
   writes for synchronous swap and allowing filesystems to directly export
   their own swap_ops.
 
 - "mm/khugepaged: several cleanups" (Nico Pache):
 
   khugepaged accumulated redundant state-checking patterns and outdated
   comments following mTHP integration.  Introduce dedicated helpers for
   PTE validation and event counting while refreshing the internal
   documentation.
 
 - "maple_tree: lock checking and clean ups" (Liam Howlett):
 
   Syzbot reports incorrectly blame memory management exit paths for
   locking bugs, maple tree erase operations risk allocation failures
   without gfp flags and internal documentation lacks clarity.
 
   Improve lock error detection, update docs, fix race and allocation
   edge cases and optimize erase allocations using a fallback to GFP_KERNEL
   | GFP_NOFAIL.
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCao9nJQAKCRDdBJ7gKXxA
 jk/9AQDlfevYJuSJmzAI8bt8ISG+/TfXMtIZC/MdbHqtQVYWPQD8Cvm3DUZsdGB/
 Gloq/HBFuMPgE8p2pwUIthdgnTPNvAc=
 =c+Nb
 -----END PGP SIGNATURE-----

Merge tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM updates from Andrew Morton:

 - "mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff"
   (Lorenzo Stoakes)

   Index MAP_PRIVATE file-backed folios by their anonymous page offset
   to resolve confusion around reverse mapping for zeroed and CoW'd
   file-backed memory.

   Use this new VMA anonymous page offset tracking to eliminate index
   conflicts and lay the foundation for scalable CoW performance
   improvements.

 - "promote mapped executable folios after first usage for MGLRU"
   (Baolin Wang)

   Make MGLRU's protection of mapped executable file folios more
   reliable. Follow the classical LRU's logic, promoting mapped
   executable file folios after their first usage to give executable
   code a better chance to stay in memory and improve workload
   performance.

 - "mm: vmscan: fix node reclaim ignoring swappiness parameter" (Ridong
   Chen)

   Fix per-node proactive reclaim interface's ignoring the swappiness
   parameter when CONFIG_MEMCG is disabled by consolidating
   sc_swappiness() into a single function that checks
   proactive_swappiness regardless of kernel configuration.

 - "mm/vmscan: reduce lru_lock contention via vmstat-derived
   scan-balance cost" (Usama Arif)

   Reduce lru_lock contention in the reclaim path by deriving
   scan-balance costs from vmstat counters rather than lock-acquired
   producer updates.

   Read and decay these cost signals on the reclaim side under a
   dedicated per-lruvec lock, reducing total LRU lock wait time by over
   60% without impacting scan throughput.

 - "zram: fix zram issues reported by sashiko" (Sergey Senozhatsky)

   Fix two low-risk zram bugs which Sashiko spotted in drive-by review.

 - "Honor XA_FLAGS_ACCOUNT in xas_split_alloc() and charge to folio's
   memcg" (Zi Yan)

   Fix xas_split_alloc() by enabling target folio memcg charging during
   splits and adding the missing __GFP_ACCOUNT flag for proper XArray
   node memory accounting.

 - "selftests/mm: use pattern matching in .gitignore" (Pratyush Mallick)

   Replace hardcoded binary names in selftests/mm/.gitignore with a
   generic pattern-matching rule to automatically ignore generated test
   files and avoid manual updates when adding new tests.

 - "mm/page_ext: remove pgdat_page_ext_init()" (Sang-Heon Jeon)

   Make the incompatibility between FLATMEM and NUMA explicit in
   mm/Kconfig and remove the unused pgdat_page_ext_init() function.

 - "zram: fix zstd error paths and add parameter validation" (Haoqin
   Huang)

   Clean up zram compression backends by removing redundant error
   cleanup, adding parameter and dictionary validation, auto-prefixing
   algorithm error logs, and resetting parameters prior to
   reinitialization.

 - "zram: fix stale scan bounds after reinitialization" (Longlong Xia)

   Prevent out-of-bounds slot accesses during concurrent zram resets by
   moving table scan bound calculations under dev_lock in
   writeback_store() and read_block_state().

 - "add anon mTHP collapse test cases" (Baolin Wang)

   Extend selftests helper functions to support arbitrary page orders
   and add new test cases and options for mTHP collapse in khugepaged.

 - "selftests/mm: Handle unsupported and transient test conditions"
   (Muhammad Usama Anjum)

   Update MM selftests to report a SKIP status instead of a failure when
   required kernel or filesystem features are unsupported, while adding
   retry logic for transient page migration errors.

 - "mm/zswap: Fixes and improves the zswap shrink" (Hao Jia)

   Fix the missing zswap global shrinker when CONFIG_MEMCG is disabled
   and extend shrink_memcg() to support batch writeback for improved
   writeback efficiency.

 - "alloc_tag: introduce IOCTL-based filtering for MAP" (Suren
   Baghdasaryan)

   Introduce an IOCTL-based binary interface for memory allocation
   profiling that enables kernel-side filtering before per-CPU counter
   aggregation.

   This eliminates the text-parsing overhead of /proc/allocinfo and
   provides up to a 20x speedup by transferring only filtered allocation
   data to userspace.

 - "better block swap batching and a different take on swap_ops v5"
   (Christoph Hellwig)

   Refactor block swap I/O to use swap_iocb for batching instead of
   single-bio requests and rebase the swap_ops interface, achieving
   faster swap throughput during kernel builds.

 - "mm: kmemleak: reduce transient false positives by confirming leaks"
   (Catalin Marinas)

   Reduce false-positive kmemleak reports by combining two kmemleak
   enhancements that add a second confirmation scan and a configurable
   minimum unreferenced scan count module parameter.

 - "mm: kmemleak: default min_unref_scans to 2 for verbose kernels"
   (Breno Leitao)

   Auto-scanning kernels can generate false-positive memory leak reports
   on single scans, so this patch defaults min_unref_scans to 2 when
   CONFIG_DEBUG_KMEMLEAK_VERBOSE is enabled to require a second
   confirming scan.

 - "swap_ops updates" (Christoph Hellwig)

   Batching I/O for synchronous swap devices causes performance
   regressions and filesystem-based swap suffers from double-indirection
   overhead. This series resolves both issues by reintroducing per-folio
   writes for synchronous swap and allowing filesystems to directly
   export their own swap_ops.

 - "mm/khugepaged: several cleanups" (Nico Pache)

   khugepaged accumulated redundant state-checking patterns and outdated
   comments following mTHP integration. Introduce dedicated helpers for
   PTE validation and event counting while refreshing the internal
   documentation.

 - "maple_tree: lock checking and clean ups" (Liam Howlett)

   Syzbot reports incorrectly blame memory management exit paths for
   locking bugs, maple tree erase operations risk allocation failures
   without gfp flags and internal documentation lacks clarity.

   Improve lock error detection, update docs, fix race and allocation
   edge cases and optimize erase allocations using a fallback to
   GFP_KERNEL | GFP_NOFAIL.

* tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (172 commits)
  selftests/proc: make proc-maps-race work with READ_IMPLIES_EXEC
  memcg: move LRU size accounting on reparenting instead of copying it
  mm/vmscan: fix comment logic in balance_pgdat
  maple_tree: add helper mas_make_walkable()
  maple_tree: avoid extra gap calculation
  maple_tree: fix argument name in header
  maple_tree: change two GFP flags in tests
  maple_tree: document erase and allocations better
  maple_tree: avoid mas_erase() and mtree_erase() failures
  maple_tree: document that erase may use GFP_KERNEL for allocations
  maple_tree: catch race in mas_alloc_cyclic()
  maple_tree: add bulk parent set helper
  maple_tree: micro optimisation of mas_wr_store_type()
  maple_tree: optimise mas_wr_node_store() when not in rcu mode
  maple_tree: use prefetched value in mas_wr_store_type()
  maple_tree: clarify comments on mas_nomem()
  maple_tree: drop MAPLE_ALLOC_SLOTS
  maple_tree: drop dead code from mas_extend_spanning_null()
  maple_tree: documentation fix
  maple_tree: add write lock checking with lockdep sequence numbers
  ...
 2026-08-27 09:17:06 -07:00
Linus Torvalds
b035a8be20 runtime verification fix for 7.3: 
- Use .old instead of .bak for rvgen kunit backup files
 
   The rvgen kunit command generates .bak backup files and these are
   checked in for selftests as "golden" files for make check. Clean
   make disclean removes such files, leaving the tree dirty.
   Switch to .old to preserve a clean tree after make disclean.
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCao80ThQccm9zdGVkdEBn
 b29kbWlzLm9yZwAKCRAp5XQQmuv6qphQAQC/B9JUq0aHC/xcPyR+4kFG13jykotd
 h/0xV1e6nyExigEAtzx4Lc/JnUzXPVpmtabzOGHwMTklbDl9bfnZtOdEmQo=
 =MY27
 -----END PGP SIGNATURE-----

Merge tag 'trace-rv-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull runtime verification fix from Steven Rostedt:

 - Use .old instead of .bak for rvgen kunit backup files

   The rvgen kunit command generates .bak backup files and these are
   checked in for selftests as "golden" files for make check. But
   'make distclean' removes such files, leaving the tree dirty.

   Switch to .old to preserve a clean tree after make disclean.

* tag 'trace-rv-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  verification/rvgen: Use .old instead of .bak for kunit backup files
 2026-08-26 14:47:22 -07:00
Linus Torvalds
b81e341319 More thermal control updates for 7.3-rc1 
- Fix missing bitfield include headers in Armada and QCom SPM BMG
    drivers (Daniel Lezcano)
 
  - Fix missed file when manually applying a change after a conflict
    resolution for the QCom SPMI ADC TM5 Gen3 (Daniel Lezcano)
 
  - Move thermal_zone_device_enable() to the right place in order to
    prevent calling it if the thermal zone registration failed (Dan
    Carpenter)
 
  - Improve bitfield manipulations on Armada (Bryan B. Lima)
 
  - Remove unneeded 'fast_io' on Sun8i and Armada (Wolfram Sang)
 
  - Fix wrong boundary when clamping the low values in the set_trips()
    callback and fix wrong mask when setting the temperature interval on
    Airoha (Christian Marangi)
 
  - Make use of the regmap API to support Airoha AN7583 (Christian
    Marangi)
 
  - Fix adc_tm5_get_temp() return check value on the QCom SPMI ADC
    sensor (Rakesh Kota)
 
  - Fix unbalanced clock enablement when the resume fails on the iMX
    driver (Can Peng)
 
  - Add Qualcomm Master BandGap thermal monitor support (Satya Priya
    Kakitapalli)
 
  - Add Maili Temperature bindings compatible (Haritha S K)
 
  - Add a devm action to clean hardware interrupts, sampling, and
    control registers on Spacemit K1 (Pei Xiao)
 
  - Fix trivial typo in a thermal OF code comment (Marek Vasut)
 
  - Remove unnecessary print on Qcom SPMI ADC driver when a call to
    devm_request_threaded_irq() fails as this one already prints a
    message (Jishnu Prakash)
 
  - Add support for QCom PMIC5 Gen3 ADC by using auxiliary driver and
    shared interrupt with the IIO driver (Jishnu Prakash)
 
  - Make resets optional on MT8196 and add the corresponding property in
    the DT bindings (AngeloGioacchino Del Regno)
 
  - Fix clock staying enabled on failing resume operation on Qoriq (Can
    Peng)
 
  - Fix wrong closing brace position in thermal library header (Andreas
    Haufler)
 
  - Fix low and high trip point validation by moving the check after the
    clamp on the spacemit driver (surendra)
 
  - Remove redundant error messages on IRQ request failure (Pan Chuang)
 
  - Add IIO_CONSUMER namespace import to the qcom-spmi-mbg-tm thermal
    driver to avoid modpost warnings that would appear after merging the
    iio tree against the thermal updates (Nathan Chancellor)
 
  - Revert two recent cosmetic updates of the thermal core conflicting
    with driver core plans to eliminate class_create() (Rafael Wysocki)
 -----BEGIN PGP SIGNATURE-----
 
 iQFGBAABCAAwFiEEcM8Aw/RY0dgsiRUR7l+9nS/U47UFAmqPL7YSHHJqd0Byand5
 c29ja2kubmV0AAoJEO5fvZ0v1OO1IigH/iBFLcPxeH8fHHMHGNyOwYB2mEJ5NUyO
 nJCxvNdmoLqtj12xpfhzSviK0rczFcJD4YGztH7ExbP30gPR3mhG8fo2nEDp8JUK
 EOqzo9rzGwENIt1FFGmh6r/e0KMJNP8UwWQr17NJEcoRfrAEEN1kZ5Xl40excQHB
 WtKWfYWaICZwmt1u3v2QEWFZJEPovTb9d1Z1ekCdYdmKHq1kn4CCYWhSdFPyCPpL
 QjDaIoN2TuRRe5jMEtBqRtdjWo1UyCjc5I+Vz9+mCCOlgMWagizP4Qc+qsBJ9UfA
 vY46s+RFTyISIQ9eHnHdiIYdLlnoweS5wsGqiBXmncrvVOH8u3GBYfw=
 =e7sH
 -----END PGP SIGNATURE-----

Merge tag 'thermal-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more thermal control updates from Rafael Wysocki:
 "This mostly consists of assorted updates of thermal drivers, including
  new hardware support (Airoha AN7583, Qualcomm Master BandGap thermal
  monitor, QCom PMIC5 Gen3 ADC), but it also includes two reverts of
  recent cosmetic thermal core updates that went against driver core
  plans to eliminate class_create():

   - Fix missing bitfield include headers in Armada and QCom SPM BMG
     drivers (Daniel Lezcano)

   - Fix missed file when manually applying a change after a conflict
     resolution for the QCom SPMI ADC TM5 Gen3 (Daniel Lezcano)

   - Move thermal_zone_device_enable() to the right place in order to
     prevent calling it if the thermal zone registration failed (Dan
     Carpenter)

   - Improve bitfield manipulations on Armada (Bryan B. Lima)

   - Remove unneeded 'fast_io' on Sun8i and Armada (Wolfram Sang)

   - Fix wrong boundary when clamping the low values in the set_trips()
     callback and fix wrong mask when setting the temperature interval
     on Airoha (Christian Marangi)

   - Make use of the regmap API to support Airoha AN7583 (Christian
     Marangi)

   - Fix adc_tm5_get_temp() return check value on the QCom SPMI ADC
     sensor (Rakesh Kota)

   - Fix unbalanced clock enablement when the resume fails on the iMX
     driver (Can Peng)

   - Add Qualcomm Master BandGap thermal monitor support (Satya Priya
     Kakitapalli)

   - Add Maili Temperature bindings compatible (Haritha S K)

   - Add a devm action to clean hardware interrupts, sampling, and
     control registers on Spacemit K1 (Pei Xiao)

   - Fix trivial typo in a thermal OF code comment (Marek Vasut)

   - Remove unnecessary print on Qcom SPMI ADC driver when a call to
     devm_request_threaded_irq() fails as this one already prints a
     message (Jishnu Prakash)

   - Add support for QCom PMIC5 Gen3 ADC by using auxiliary driver and
     shared interrupt with the IIO driver (Jishnu Prakash)

   - Make resets optional on MT8196 and add the corresponding property
     in the DT bindings (AngeloGioacchino Del Regno)

   - Fix clock staying enabled on failing resume operation on Qoriq (Can
     Peng)

   - Fix wrong closing brace position in thermal library header (Andreas
     Haufler)

   - Fix low and high trip point validation by moving the check after
     the clamp on the spacemit driver (surendra)

   - Remove redundant error messages on IRQ request failure (Pan Chuang)

   - Add IIO_CONSUMER namespace import to the qcom-spmi-mbg-tm thermal
     driver to avoid modpost warnings that would appear after merging
     the iio tree against the thermal updates (Nathan Chancellor)

   - Revert two recent cosmetic updates of the thermal core conflicting
     with driver core plans to eliminate class_create() (Rafael
     Wysocki)"

* tag 'thermal-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
  thermal/drivers/qcom-spmi-mbg-tm: Add module namespace import for IIO_CONSUMER
  Revert "thermal/core: Allocate the thermal class dynamically"
  Revert "thermal/core: Use the thermal class pointer as init guard"
  thermal/drivers/armada: Fix missing bitfields include
  thermal/drivers/qcom/spm mbg tm: Fix missing bitfield header
  thermal/drivers/qcom: Fix missing spmi adc tm5 gen3 file
  thermal/drivers: Remove redundant error messages on IRQ request failure
  thermal/drivers/spacemit: Validate clamped trip thresholds
  tools/lib/thermal: Fix misplaced extern "C" closing brace
  thermal/drivers/qoriq: Disable clock on resume failure
  thermal/drivers/mediatek/lvts_thermal: Make reset optional for MT8196
  dt-bindings: thermal: mediatek: Make resets optional for MT8196
  thermal/drivers/qcom: add support for PMIC5 Gen3 ADC thermal monitoring
  iio: adc: qcom-spmi-adc5-gen3: Share SDAM0 IRQ with ADC_TM auxiliary driver
  iio: adc: qcom-spmi-adc5-gen3: Remove an unnecessary print
  thermal/of: Fix trivial enabled typo
  thermal/drivers/spacemit/k1: Add shutdown action and reorder registration order
  dt-bindings: thermal: qcom-tsens: Document the Maili Temperature Sensor
  thermal/drivers/qcom: Add support for Qualcomm MBG thermal monitoring
  dt-bindings: thermal: Add Qualcomm MBG thermal monitor support
  ...
 2026-08-26 14:21:30 -07:00
Linus Torvalds
7bb6284aa7 Arm: 
* Add support for 'slot' based PMU events, paired with new UAPI that
   compels the user to select a specific PMU implementation
 
 * Lazy save/restore of vCPU state for pKVM, along with various fixes
   and cleanups to the management of vCPU state between the untrusted
   host and pKVM hypervisor
 
 * Disable traps of EL1 registers for nested hypervisors when FEAT_NV2p1
   is present, guaranteeing that EL2-specific register bits are stateful
   in the EL1 counterpart
 
 * Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the scope
   of those instructions remains 'in host' (i.e. L1 kernel/userspace)
 
 * Pile of fixes for the management of the VNCR pseudo-TLB, such as
   under-invalidations and races with concurrent TLBIs on other vCPUs
 
 * Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
   runtime-patched constant, allowing the same data to be shared with
   pKVM prior to dropping host privileges
 
 * Considerable pile of LLM-assisted fixes around the shop but mostly in
   the VGIC, our in-kernel generator of bugs (and sometimes interrupts)
 
 LoongArch:
 
 * Advertise already-supported capabilities.
 
 * Some bug fixes about timer and MMIO.
 
 * Some hardening about interrupt injection.
 
 * Replace kvm_err() with kvm_pr_unimpl().
 
 * Add FPU/LSX/LASX test cases for selftests.
 
 RISC-V:
 
 * Svadu/Zicfiss/Zicfilp FWFT support for Guest
 
 * Use try_cmpxchg for IMSIC MRIF RMW
 
 * More arch-specific tracepoints in KVM RISC-V
 
 * Eager page splitting when enabling dirty logging
 
 * Optimize hfence request handling for SMP Guests
 
 * Improve dirty log clearing by skipping zero bits in mask
 
 * Guard HFENCE range loops against overflow
 
 * CPU PM notifiers in KVM RISC-V for non-retentive idle states
 
 * Fix kernel-mode vector context save/restore for Guest
 
 s390:
 
 * Fixes for vfio-ap
 
 * Fixes for the gmap rework
 
 * Fixes for vsie
 
 * AI triggered fixes all over
 
 * diag9c tracing
 
 * code move preparation for the additional arm64 support
 
 * enable CONTEXT_ANALYSIS
 
 x86:
 
 * Perform spring cleaning on x86.{c,h} and asm/kvm_host.h, by adding regs.c
   (the kvm_cache_regs.h => regs.h is already applied) and msrs.{c,h}, and moving
   relevant code out of x86.c.
 
 * Split kvm_mmu in three parts, respectively to describe the format of page
   tables, walking the guest page tables and building the page tables.  Always
   use the same page table walker kvm->arch.gva_walk as the entry point to
   convert a guest's virtual address, where the previous code used two
   different kvm_mmu structs depending on whether the walk included nested
   EPT/NPT or not.  Make page fault vmexits reuse the permission checking
   machinery that is used for guest page faults.  This is both a cleanup
   and a baby step towards supporting XS/XU memory permissions.
 
 * Document some of the "fun" gotchas with the APIC base when creating IRQCHIPs
   on x86.
 
 * Remove a defunct masterclock update from kvm_xen_shared_info_init().  It
   could result in incorrect kvmclock due to triggering an unnecessary
   switch to/from masterclock mode.
 
 * Skip Xen runstate time updates if time has effectively gone backwards, so
   that the guest doesn't report 100% steal time for a very, very long time.
 
 * Drop KVM's runtime updates of the Xen PV timing CPUID leaf, as KVM was
   updating the wrong sub-leaf, and upstream KVM will soon provide all the
   information needed by userspace to populate the CPUID field itself.
 
 * Fix a bug where KVM would walk a newly created rmap without holding the rmap
   lock (or mmu_lock) during aging.
 
 * Fix a bug where aging TDP MMU SPTEs could clobber FROZEN SPTEs.
 
 * Fix a variety of #DB priority bugs.
 
 * Fix a class of races related to enabling Hyper-V emulation on a vCPU after
   the vCPU is visible to the rest of KVM.
 
 * Use static calls for nested virtualization ops.
 
 * Move more KVM-internal code out of x86's kvm_host.h.
 
 * Enumerate support for a variety of Zhaoxin instructions that don't require
   explicit virtualization.
 
 * Fix missing EFER validation bugs, including in the KVM_SET_SREGS* path.
 
 * Harden kvm_vcpu_map() against double-mapping and thus leaking references.
 
 * Misc fixes and cleanups, e.g. for largely benign syzkaller splats.
 
 x86 (Intel):
 
 * Zero a vCPU's entry in VMX's Posted Interrupt Descriptor table used for IPI
   virtualization when the vCPU is freed, to fix a use-after-free where hardware
   will write to a freed vCPU's PID.
 
 * Service local TLB flushes on a failed nested VM-Enter to fix a bug where KVM
   could miss a TLB on a future, successful VM-Enter with the same L2 VPID.
 
 * Cap the maximum value shoved into the VMX Preemption Timer to workaround an
   erratum that affects all existing Intel CPUs that support CPUID 0x15.
 
 * Fix VPID virtualization bugs where KVM would fail to flush hardware TLBs.
 
 * Harden the TDX "populate" ioctls against bad input, and to prepare
   for supporting in-place private<=>shared conversion.
 
 x86 (AMD):
 
 * Forcefully invalidate SNP VMSA pages if their backing guest_memfd page is
   zapped/invalidated, e.g. due to a PUNCH_HOLE in response to a Page-State
   Change request.
 
 * Remove a dying VM from the GA Log notifier list before the VM is actually
   destroyed, to fix a potential use-after-free.
 
 * While FOLL_WRITE was needed in the past to trigger CoW unsharing, nowadays
   FOLL_LONGTERM does that already even without FOLL_WRITE, and in fact,
   get_user_pages() actually disallows FOLL_WRITE together with FOLL_LONGTERM.
   So don't pass FOLL_WRITE when registering encrypted memory regions, i.e. when
   pinning SEV/SEV-ES guest memory, to fix a regression with file-backed memory
   introduced by KVM's (correct) usage of long-term pins.
 
   (This was reviewed by mm maintainers; for more information, see commit
   ee1a586dd1).
 
 * Allocate full pages for SEV/SEV-ES {DE,EN}CRYPT ops on SNP-enabled hosts to
   fix a data corruption issue due to the PSP driver assigning to-be-written
   pages to firmware (as required by the SNP specs).
 
 * Unconditionally intercept ICBEP so that KVM generates the correct guest RIP
   when handling an ICEBP-induced TASK_SWITCH #VMEXIT.
 
 * Harden the SNP "populate" ioctls against bad input, and to prepare
   for supporting in-place private<=>shared conversion.
 
 Generic:
 
 * Remove kvm_debugfs_dir if kvm_init() fails after creating KVM's debugfs.
 
 * Add a per-VM bitmap to track which vCPU IDs have been "claimed" but for
   which the vCPU isn't yet online, and use the bitmap to reject duplicate IDs
   before calling into arch code.  This allows arch code to consume vcpu_id
   without having to worry about cross-vCPU clobbering (at least s390 and x86
   have had related bugs).
 
 * Rework the so called "prepare" and "invalidate" guest_memfd hooks to prepare
   for in-place private<=>shared conversion, and clean up a few warts along the
   way.
 
 Selftests:
 
 * Automatically allocate a full page for L2 guest stacks on x86 instead of
   requiring test-specific L1 guest code to carve out a portion of the L1
   stack for L2 usage, and to ensure the L2 stack also adheres to the x86-64
   calling convention ABI.
 
 * Add a selftest to verify {Guest,Host}-Only behavior in x86's mediated PMU.
 
 * Clean up nested SVM's handling of GPRs on L2<=>L1 transitions, reuse the
   functionality for nested VMX, and drop the ucall hack that was fudging
   around the lack of GPR switching on nVMX.
 
 * Add a stress test to verify KVM doesn't clobber/drop #PF state, e.g. CR2,
   across save/restore, including when L2 is active.
 
 * Add a test to verify KVM_CREATE_VM accepts exactly what is reported by
   KVM_CAP_VM_TYPES.
 
 * Misc selftests fixes and cleanups
 
 * Fix several issues with seeding the pRNG, and rework the pRNG APIs to that
   the pRNG can be sanely used in host code, not just guest code.
 
 * Add an IRQ test to validate virtual IRQ deliverty for IRQs wired up via
   KVM_IRQFD + KVM_SET_GSI_ROUTING, with optional support for triggering IRQs
   via writes to an assigned VFIO device.
 
 * Add syscall wrappers to assert success on a variety of pthreads and CPU
   affinity APIs.
 
 * Set vCPU pthread affinity as early as possible to reduce contention issues
   that were surfaced by PREEMPT_LAZY, which result in runtimes of over a
   minute on large hosts, versus the expected ~5 seconds.
 
 * Rework the PMU counters test to run each testcase using a single VM with
   many vCPUs for each sub-testcase, instead of using a unique VM for each
   sub-testcase.  This cuts the runtime by ~20x.
 
 Miscellaneous:
 
 * MAINTAINERS updates for vfio-ap, guest_memfd, kvm-x86.  Mostly representing
   the status quo more accurately, but also... welcome David Hildenbrand
   as guest_memfd reviewer!
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmqMgosUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroP8bwf+ORImBMDM3QEmybZM3I+N2+xqSuHP
 QHttbmqGbsFK/RUeH96/X/+P9waqaz3uVeUQ6Qp2r0ryqwKtLt8YvIxKDp+M0vVJ
 n+iukk1xulBEc28aGdKHn9G4wayAwDA/9f7CvJ23hojaJfLScbF3OlFkDd7y5DpO
 x15Rtg9folYUjjop3LDML4N9/9Qmk4KRvVZ4ZVv6IB4uGJJ72fLd5dbBMyDk+BLl
 Lz9N1xVTXcnJXJmrjMB4/QNt/HiQJdun8LcokJZyykta7Xx6aY7OGZv+VmCeq47K
 e9Hk8mD4AyAdVbVvIntROSeBJOrlsgWJXAPHea6wEdRQnS3XVEBuZC0yDA==
 =rfLh
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "ARM64:

   - Add support for 'slot' based PMU events, paired with new UAPI that
     compels the user to select a specific PMU implementation

   - Lazy save/restore of vCPU state for pKVM, along with various fixes
     and cleanups to the management of vCPU state between the untrusted
     host and pKVM hypervisor

   - Disable traps of EL1 registers for nested hypervisors when
     FEAT_NV2p1 is present, guaranteeing that EL2-specific register bits
     are stateful in the EL1 counterpart

   - Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the
     scope of those instructions remains 'in host' (i.e. L1
     kernel/userspace)

   - Pile of fixes for the management of the VNCR pseudo-TLB, such as
     under-invalidations and races with concurrent TLBIs on other vCPUs

   - Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
     runtime-patched constant, allowing the same data to be shared with
     pKVM prior to dropping host privileges

   - Considerable pile of LLM-assisted fixes around the shop but mostly
     in the VGIC, our in-kernel generator of bugs (and sometimes
     interrupts)

  LoongArch:

   - Advertise already-supported capabilities

   - Some bug fixes about timer and MMIO

   - Some hardening about interrupt injection

   - Replace kvm_err() with kvm_pr_unimpl()

   - Add FPU/LSX/LASX test cases for selftests

  RISC-V:

   - Svadu/Zicfiss/Zicfilp FWFT support for Guest

   - Use try_cmpxchg for IMSIC MRIF RMW

   - More arch-specific tracepoints in KVM RISC-V

   - Eager page splitting when enabling dirty logging

   - Optimize hfence request handling for SMP Guests

   - Improve dirty log clearing by skipping zero bits in mask

   - Guard HFENCE range loops against overflow

   - CPU PM notifiers in KVM RISC-V for non-retentive idle states

   - Fix kernel-mode vector context save/restore for Guest

  s390:

   - Fixes for vfio-ap

   - Fixes for the gmap rework

   - Fixes for vsie

   - AI triggered fixes all over

   - diag9c tracing

   - code move preparation for the additional arm64 support

   - enable CONTEXT_ANALYSIS

  x86:

   - Perform spring cleaning on x86.{c,h} and asm/kvm_host.h, by adding
     regs.c (the kvm_cache_regs.h => regs.h is already applied) and
     msrs.{c,h}, and moving relevant code out of x86.c

   - Split kvm_mmu in three parts, respectively to describe the format
     of page tables, walking the guest page tables and building the page
     tables. Always use the same page table walker kvm->arch.gva_walk as
     the entry point to convert a guest's virtual address, where the
     previous code used two different kvm_mmu structs depending on
     whether the walk included nested EPT/NPT or not. Make page fault
     vmexits reuse the permission checking machinery that is used for
     guest page faults. This is both a cleanup and a baby step towards
     supporting XS/XU memory permissions

   - Document some of the "fun" gotchas with the APIC base when creating
     IRQCHIPs on x86

   - Remove a defunct masterclock update from kvm_xen_shared_info_init().
     It could result in incorrect kvmclock due to triggering an
     unnecessary switch to/from masterclock mode

   - Skip Xen runstate time updates if time has effectively gone
     backwards, so that the guest doesn't report 100% steal time for
     a very, very long time

   - Drop KVM's runtime updates of the Xen PV timing CPUID leaf, as KVM
     was updating the wrong sub-leaf, and upstream KVM will soon provide
     all the information needed by userspace to populate the CPUID field
     itself

   - Fix a bug where KVM would walk a newly created rmap without holding
     the rmap lock (or mmu_lock) during aging

   - Fix a bug where aging TDP MMU SPTEs could clobber FROZEN SPTEs

   - Fix a variety of #DB priority bugs

   - Fix a class of races related to enabling Hyper-V emulation on a
     vCPU after the vCPU is visible to the rest of KVM

   - Use static calls for nested virtualization ops

   - Move more KVM-internal code out of x86's kvm_host.h

   - Enumerate support for a variety of Zhaoxin instructions that don't
     require explicit virtualization

   - Fix missing EFER validation bugs, including in the KVM_SET_SREGS*
     path

   - Harden kvm_vcpu_map() against double-mapping and thus leaking
     references

   - Misc fixes and cleanups, e.g. for largely benign syzkaller splats

  x86 (Intel):

   - Zero a vCPU's entry in VMX's Posted Interrupt Descriptor table used
     for IPI virtualization when the vCPU is freed, to fix a
     use-after-free where hardware will write to a freed vCPU's PID

   - Service local TLB flushes on a failed nested VM-Enter to fix a bug
     where KVM could miss a TLB on a future, successful VM-Enter with
     the same L2 VPID

   - Cap the maximum value shoved into the VMX Preemption Timer to
     workaround an erratum that affects all existing Intel CPUs that
     support CPUID 0x15

   - Fix VPID virtualization bugs where KVM would fail to flush hardware
     TLBs

   - Harden the TDX "populate" ioctls against bad input, and to prepare
     for supporting in-place private<=>shared conversion

  x86 (AMD):

   - Forcefully invalidate SNP VMSA pages if their backing guest_memfd
     page is zapped/invalidated, e.g. due to a PUNCH_HOLE in response to
     a Page-State Change request

   - Remove a dying VM from the GA Log notifier list before the VM is
     actually destroyed, to fix a potential use-after-free

   - While FOLL_WRITE was needed in the past to trigger CoW unsharing,
     nowadays FOLL_LONGTERM does that already even without FOLL_WRITE,
     and in fact, get_user_pages() actually disallows FOLL_WRITE
     together with FOLL_LONGTERM. So don't pass FOLL_WRITE when
     registering encrypted memory regions, i.e. when pinning SEV/SEV-ES
     guest memory, to fix a regression with file-backed memory
     introduced by KVM's (correct) usage of long-term pins

     (This was reviewed by mm maintainers; for more information, see
     commit ee1a586dd1 "KVM: SEV: Drop FOLL_WRITE for encrypted region
     registration")

   - Allocate full pages for SEV/SEV-ES {DE,EN}CRYPT ops on SNP-enabled
     hosts to fix a data corruption issue due to the PSP driver
     assigning to-be-written pages to firmware (as required by the SNP
     specs)

   - Unconditionally intercept ICBEP so that KVM generates the correct
     guest RIP when handling an ICEBP-induced TASK_SWITCH #VMEXIT

   - Harden the SNP "populate" ioctls against bad input, and to prepare
     for supporting in-place private<=>shared conversion

  Generic:

   - Remove kvm_debugfs_dir if kvm_init() fails after creating KVM's
     debugfs

   - Add a per-VM bitmap to track which vCPU IDs have been "claimed" but
     for which the vCPU isn't yet online, and use the bitmap to reject
     duplicate IDs before calling into arch code. This allows arch code
     to consume vcpu_id without having to worry about cross-vCPU
     clobbering (at least s390 and x86 have had related bugs)

   - Rework the so called "prepare" and "invalidate" guest_memfd hooks
     to prepare for in-place private<=>shared conversion, and clean up a
     few warts along the way

  Selftests:

   - Automatically allocate a full page for L2 guest stacks on x86
     instead of requiring test-specific L1 guest code to carve out a
     portion of the L1 stack for L2 usage, and to ensure the L2 stack
     also adheres to the x86-64 calling convention ABI

   - Add a selftest to verify {Guest,Host}-Only behavior in x86's
     mediated PMU

   - Clean up nested SVM's handling of GPRs on L2<=>L1 transitions,
     reuse the functionality for nested VMX, and drop the ucall hack
     that was fudging around the lack of GPR switching on nVMX

   - Add a stress test to verify KVM doesn't clobber/drop #PF state,
     e.g. CR2, across save/restore, including when L2 is active

   - Add a test to verify KVM_CREATE_VM accepts exactly what is reported
     by KVM_CAP_VM_TYPES

   - Misc selftests fixes and cleanups

   - Fix several issues with seeding the pRNG, and rework the pRNG APIs
     to that the pRNG can be sanely used in host code, not just guest
     code

   - Add an IRQ test to validate virtual IRQ deliverty for IRQs wired up
     via KVM_IRQFD + KVM_SET_GSI_ROUTING, with optional support for
     triggering IRQs via writes to an assigned VFIO device

   - Add syscall wrappers to assert success on a variety of pthreads and
     CPU affinity APIs

   - Set vCPU pthread affinity as early as possible to reduce contention
     issues that were surfaced by PREEMPT_LAZY, which result in runtimes
     of over a minute on large hosts, versus the expected ~5 seconds

   - Rework the PMU counters test to run each testcase using a single VM
     with many vCPUs for each sub-testcase, instead of using a unique VM
     for each sub-testcase. This cuts the runtime by ~20x

  Miscellaneous:

   - MAINTAINERS updates for vfio-ap, guest_memfd, kvm-x86. Mostly
     representing the status quo more accurately, but also... welcome
     David Hildenbrand as guest_memfd reviewer!"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (413 commits)
  KVM: arm64: Validate GICv5 timer PPIs before claiming ownership
  KVM: arm64: vgic: Reject out-of-range GICv5 PPI IDs
  KVM: arm64: vgic: Prevent speculative SPI array underflow
  KVM: arm64: vgic: Free gic_kvm_info on initialization failure
  KVM: arm64: Avoid mismatched accesses to 'struct kvm_nvhe_init_params'
  s390/vfio-ap: Fix NULL deref in status_show() during queue probe
  s390/vfio-ap: Fix hot-unplug skipped when last AP adapter or domain removed
  s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap
  s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove
  s390/vfio-ap: Fix required lock not held during update of ap_matrix_mdev object
  s390/vfio-ap: Fix missing lock required to access list of ap_matrix_mdev objects
  s390/vfio-ap: Fix dereference matrix_mdev->kvm without checking for NULL
  s390/vfio-ap: Fix stale do_remove flag across iterations in vfio_ap_mdev_cfg_remove
  RISC-V: KVM: fix vcpu vector context handling for kernel-mode vector
  riscv: vector: allow non-preemptible kernel-mode vector with IRQs off
  riscv: vector: refactor riscv_v_start_kernel_context
  KVM: s390: gmap: Make prefix handling optional
  KVM: s390: gmap: Make CMMA optional
  KVM: s390: gmap: Make storage keys optional
  KVM: s390: Prepare gmap for a second KVM implementation
  ...
 2026-08-25 11:48:04 -07:00
Linus Torvalds
93e4b3076b Char/Misc/IIO/etc driver update for 7.3-rc1 
Here is the big set of char, misc, iio, counter, fpga, and other small
 driver subsystems for 7.3-rc1.
 
 Overall, due to some driver removals we only added a bit more code than
 removed, which was a nice change.  Highlights in this merge request are:
   - Loads of IIO driver updates and additions
   - binder driver updates (more on that below...)
   - Removal of the SGI XP and GRU drivers as they are not used anymore
     and turn out to be pretty insecure overall
   - Removal of the obsolete ibmasm driver as it's not being used anymore
   - Coresight driver updates and additions
   - Mei driver udpates
   - Counter driver updates
   - FPGA driver updates
   - ICC driver updates
   - lots and lots of other tiny driver updates to resolve reported
     issues
 
 All of these have been in linux-next for a while, with the only reported
 issues being some major merge conflicts.  Miguel pointed out some of
 these with the Rust tree merge, which is the majority of them.  I'll
 follow up with a diffstat of the merge resolution I made against your
 most recent tree, which works for me.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 
 iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCao143A8cZ3JlZ0Brcm9h
 aC5jb20ACgkQMUfUDdst+ymtUgCeKB62gT1JfA86cg3NDB1opp+10N0An3oBBegQ
 IJLqJgK45dTNtMGBwGFV
 =68af
 -----END PGP SIGNATURE-----

Merge tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc/IIO/etc driver updates from Greg KH:
 "Here is the big set of char, misc, iio, counter, fpga, and other small
  driver subsystems for 7.3-rc1.

  Overall, due to some driver removals we only added a bit more code
  than removed, which was a nice change. Highlights in this merge
  request are:

   - Loads of IIO driver updates and additions

   - binder driver updates (more on that below...)

   - Removal of the SGI XP and GRU drivers as they are not used anymore
     and turn out to be pretty insecure overall

   - Removal of the obsolete ibmasm driver as it's not being used
     anymore

   - Coresight driver updates and additions

   - Mei driver udpates

   - Counter driver updates

   - FPGA driver updates

   - ICC driver updates

   - lots and lots of other tiny driver updates to resolve reported
     issues

  All of these have been in linux-next for a while"

* tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (513 commits)
  iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF
  iio: adc: pac1921: fix wrong channel used in trigger handler read
  iio: light: gp2ap002: re-enable irq if runtime suspend fails
  iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
  iio: light: apds9306: fix PM reference leak in apds9306_read_data()
  iio: gyro: mpu3050: fix sign of raw angular velocity readings
  iio: srf04: fix pm_runtime handling on probe error path
  iio: adc: ad4080: configure backend data size
  iio: adc: adi-axi-adc: add data size support for AD408X backend
  iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable
  iio: dac: ad5446: fix OF module device table
  iio: light: opt4001: Fix reversed GENMASK() arguments in fault count mask
  iio: light: opt4001: Reject integration times with a non-zero seconds part
  iio: light: opt4001: Fix incompatible pointer type passed to div_u64_rem()
  iio: light: opt4001: Fix power down clearing bits of the wrong register
  iio: light: opt4060: Fix incorrect register name in threshold read error message
  iio: light: opt4060: Fix pointer type passed to div_u64_rem()
  iio: light: opt4060: Reject integration times with a non-zero seconds part
  iio: light: ltrf216a: fix runtime PM reference leak in error path
  iio: pressure: dps310: fix NULL pointer dereference on ACPI probe
  ...
 2026-08-25 09:38:50 -07:00
Linus Torvalds
5f5ef9c407 Bootconfig updates for v7.3: 
- bootconfig: Support build-time command line rendering for embedded bootconfig
   . bootconfig: render descendant keys when xbc_snprint_cmdline() root has a
     value. Fix xbc_snprint_cmdline() to render descendant keys when the root
     has both a value and subkeys, and treats empty subtrees correctly.
   . bootconfig: render embedded bootconfig as a kernel cmdline at build time.
     Add build-time pipeline using tools/bootconfig -C to render the embedded
     bootconfig "kernel" subtree into .init.rodata as a cmdline string.
   . bootconfig: clean build-time tools/bootconfig from make clean.
   . bootconfig: add xbc_prepend_embedded_cmdline() helper.
     Add helper to prepend embedded bootconfig cmdline into boot_command_line
     early before parse_early_param().
   . x86/setup: prepend embedded bootconfig cmdline before parse_early_param.
     Wire early prepend helper in x86 setup_arch() so early_param handlers see
     values from the embedded bootconfig. (So this feature is currently x86 only)
   . bootconfig: skip runtime kernel.* render once prepended early.
     Avoid duplicating "kernel" keys in setup_boot_config().
   . init/main.c: use bootconfig_cmdline_requested() for the runtime opt-in.
     Refactor setup_boot_config() to share bootconfig_cmdline_requested().
   . Documentation: bootconfig: document build-time cmdline rendering.
     Document CONFIG_CMDLINE_FROM_BOOTCONFIG usage, requirements, and precedence.
 -----BEGIN PGP SIGNATURE-----
 
 iQFPBAABCgA5FiEEh7BulGwFlgAOi5DV2/sHvwUrPxsFAmqNQwAbHG1hc2FtaS5o
 aXJhbWF0c3VAZ21haWwuY29tAAoJENv7B78FKz8bcLcH/1GHYfxZHrl1aA112j60
 YqBgn98hnCiH+Q1wMhqgDIF7ks1qePT9pq0zC2vJawVa1BM6OM5RpnC4BW+YSpCa
 7tRf209Hrr5sd2i0vmsnYpmd9SV9JWKsuyz6VJjFjPsfEFtI9Nj7d3jm7WfGypUc
 aNEAjf3sntEaFB44MoKekHlLzTXDFrgBaUaAcdw3aGjUU1CE9ltdT+QooQGv6CHe
 7Z+UlmGhg+jkQa1tNNpRnKZErD5OBLnTkoMU5ca3M7PQLlPjIcOTf62SInm47Ma/
 viOyzkSYIXC/yq2U4Je4qKcZaKhNIL61jtQGFI8EbbZ0x1BzVbPjbr0DB3iq2YW4
 4Xk=
 =8++3
 -----END PGP SIGNATURE-----

Merge tag 'bootconfig-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull bootconfig updates from Masami Hiramatsu:

 - Support build-time command line building for embedded bootconfig

 - Fix xbc_snprint_cmdline() to render descendant keys when the root has
   both a value and subkeys, and treats empty subtrees correctly.

 - Add build-time pipeline using tools/bootconfig -C to render the
   embedded bootconfig "kernel" subtree into .init.rodata as a cmdline
   string.

 - Clean build-time tools/bootconfig from make clean

 - Add helper to prepend embedded bootconfig cmdline into
   boot_command_line early before parse_early_param()

 - Wire early prepend helper in x86 setup_arch() so early_param handlers
   see values from the embedded bootconfig (currently x86 only)

 - Avoid duplicating "kernel" keys in setup_boot_config()

 - Refactor setup_boot_config() to share bootconfig_cmdline_requested()

 - Document CONFIG_CMDLINE_FROM_BOOTCONFIG usage, requirements, and
   precedence

* tag 'bootconfig-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  init/main.c: use bootconfig_cmdline_requested() for the runtime opt-in
  bootconfig: skip runtime kernel.* render once prepended early
  x86/setup: prepend embedded bootconfig cmdline before parse_early_param
  Documentation: bootconfig: document build-time cmdline rendering
  bootconfig: add xbc_prepend_embedded_cmdline() helper
  bootconfig: clean build-time tools/bootconfig from make clean
  bootconfig: render embedded bootconfig as a kernel cmdline at build time
  bootconfig: render descendant keys when xbc_snprint_cmdline() root has a value
 2026-08-25 08:59:09 -07:00
Linus Torvalds
9cebfe6504 fuse update for 7.3 
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCao1RzQAKCRDh3BK/laaZ
 PJ2EAP9dfslni4sFYqtXv/43Wk2iVwwdGRRSy5Tfoq8nCeNXpQEAygIv9BuJYpl6
 DL861AOn/NfDBXpeU0vX4WQpTgtFIgc=
 =Av0t
 -----END PGP SIGNATURE-----

Merge tag 'fuse-update-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse updates from Miklos Szeredi:

 - Improve performance of the io-uring transport by introducing buffer
   pools and zero-copy (Joanne)

 - Fix lots of bugs (Baokun Li)

 - Fix io-uring initialization issues (Joanne, Bernd)

 - More prep work for large folios (Joanne)

 - Don't limit buffered read to 128k (Jim Harris)

 - Fix zeroing of page end (dirtied with mmap) on file size extension
   (Jimmy Zuber)

 - Improve performance in certain cases with wake_up_sync() when queuing
   request (Xuewen Yan)

 - Misc fixes and cleanups (Xuewen Yan)

* tag 'fuse-update-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: (35 commits)
  fuse: zero the partial EOF page when extending a file
  io_uring: Add missing include for ITER_SOURCE and ITER_DEST
  fuse: Fix the condition to enable over-io-uring
  fuse: invalidate the correct range after O_APPEND direct write
  selftests/fuse: test post-EOF page zeroing when a file is extended
  fuse: wake one waiter per freed slot when raising max_background
  fuse: use min_not_zero() in fuse_init_server_timeout()
  fuse: copy request headers via a stack buffer for io-uring
  fuse: give wakeup hints to the scheduler for synchronous requests
  fuse: check for NULL root inode in fuse_fill_super_submount
  fuse: reject a duplicate fd= mount option
  cuse: wait for pending RCU callbacks on module exit
  fuse: fix invalidate lock leak on open O_TRUNC DAX failure
  fuse: fix invalidate lock leak on setattr writeback failure
  fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
  fuse: make dentry_tree_work static
  docs: fuse: document io-uring buffer pool and zero-copy uapi
  fuse: add zero-copy over io-uring
  fuse: support registered buffer pools in io-uring
  fuse: add io-uring buffer pools
  ...
 2026-08-25 07:59:44 -07:00
Gabriele Monaco
ab0304fd69 verification/rvgen: Use .old instead of .bak for kunit backup files 
The rvgen kunit command generates .bak backup files and these can be
checked in for selftests (make check). Clean targets like make disclean
remove such files, leaving the tree dirty.

Switch to .old to preserve a clean tree after make disclean.

Reported-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Closes: https://lore.kernel.org/lkml/aosuwKH5GOEo0xTN@google.com
Fixes: 7b6246294e ("verification/rvgen: Add selftests for rvgen kunit")
Reviewed-by: Nam Cao <namcao@linutronix.de>
Tested-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Link: https://lore.kernel.org/r/20260824081519.81103-2-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
 2026-08-25 13:56:53 +02:00
Karl Mehltretter
0685630fdc selftests/proc: make proc-maps-race work with READ_IMPLIES_EXEC 
test_maps_tearing_from_split times out when READ_IMPLIES_EXEC is set. 
This happens by default on pre-ARMv6 CPUs, which lack no-execute support.

split_vma() re-maps the first page with mod_info->prot | PROT_EXEC to make
it differ from its neighbours.  With READ_IMPLIES_EXEC the original
mapping is already executable, so no split occurs and the test hangs
waiting for the modifier child.

Use PROT_NONE for the split mapping, which always differs from its
readable neighbours.

Link: https://lore.kernel.org/20260808200312.6326-1-kmehltretter@gmail.com
Fixes: beb69e8172 ("selftests/proc: add /proc/pid/maps tearing from vma split test")
Assisted-by: Codex:gpt-5.6-terra
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Jann Horn <jannh@google.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:33 -07:00
Liam R. Howlett (Oracle)
18d4f8e6e6 maple_tree: change two GFP flags in tests 
The GFP flags in two tests are obviously incorrect.  Make the tests
correctly run by updating the GFP flags.

Link: https://lore.kernel.org/all/d9cbb89faa5bdb71d451781d214a51ce8923a83e.camel@perches.com/
Link: https://lore.kernel.org/20260821192627.4085470-17-liam@infradead.org
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Reported-by: Joe Perches <joe@perches.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:31 -07:00
Anshuman
d16e52a9ba selftests/mm: check stat() return value in khugepaged get_finfo() 
get_finfo() calls stat() to get metadata about the target directory, but
never checks the return value.  On failure, stat() returns -1 and leaves
path_stat unmodified, so path_stat.st_mode may contain uninitialized stack
data.

The code then checks S_ISDIR(path_stat.st_mode) against this potentially
garbage value.  This can produce a misleading "Not a directory" error when
the real problem is a nonexistent or inaccessible path, or, in the worst
case, the check could pass by chance on garbage data and let the function
continue using an invalid path_stat for the rest of its logic.

Check the return value and fail with a clear error message if stat()
fails, matching the error-handling style already used for statfs() and
read_file() later in the same function.

Link: https://lore.kernel.org/20260819121426.49500-1-anshumantewari123@gmail.com
Signed-off-by: Anshuman <anshumantewari123@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: SJ Park <sj@kernel.org>
Reviewed-by: Sarthak Sharma <sarthak.sharma@arm.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:27 -07:00
Anshuman
c7a4e939f8 selftests/mm: fix unchecked ftruncate return value in soft-dirty test 
test_mprotect() calls ftruncate() to resize the backing file before
mmap()'ing it, but never checks the return value.  If ftruncate() fails,
the file may remain shorter than the requested mapping size.  The
subsequent mmap() with MAP_SHARED can still succeed in this case, but the
very next line writes directly into the mapped memory (*map = 1), which
can trigger SIGBUS if the mapping extends beyond the actual file size.

Check the return value and fail cleanly with ksft_exit_fail_msg() if
ftruncate() fails, matching the error-handling style already used for the
mmap() call immediately below it.

Link: https://lore.kernel.org/20260818133206.39503-1-anshumantewari123@gmail.com
Signed-off-by: Anshuman <anshumantewari123@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:27 -07:00
Hongfu Li
dd14e6cd33 selftests/mm: drop redundant open() in mprotect_tests() 
Remove duplicate open() for local pagemap_fd in mprotect_tests() that
shadows the global pagemap_fd already opened in main().  The local fd is
never used in the function.

Link: https://lore.kernel.org/20260817080616.52946-1-hongfu.li@linux.dev
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Reviewed-by: SJ Park <sj@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:26 -07:00
Wilson Felipe Pereira
6f615890b8 selftests/cgroup: test_zswap: skip test_no_kmem_bypass if debugfs is unavailable 
test_no_kmem_bypass() needs to read /sys/kernel/debug/zswap/stored_pages
via get_zswap_stored_pages() to verify that compressed pages are charged
to the memcg.

When running in an environment where debugfs is not mounted or
CONFIG_DEBUG_FS is disabled, get_zswap_stored_pages() fails, causing the
loop to terminate early and report a false negative (KSFT_FAIL).

Selftests should not fail if debugfs is unavailable, and it should print a
message when it is skipped.

While I'm here, also add a warning message if the test is being skipped
due to totalram size and make the check for totalram more readable.

[akpm@linux-foundation.org: clarify debugfs-unavailable error message]
Link: https://lore.kernel.org/20260812050848.848882-1-wfelipe@google.com
Link: https://lore.kernel.org/20260811051434.3805648-1-wfelipe@google.com
Signed-off-by: Wilson Felipe Pereira <wfelipe@google.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: SJ Park <sj@kernel.org>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:21 -07:00
Breno Leitao
972195eb9b selftests/mm: kmemleak: drop stale min_unref_scans default from comments 
The test writes min_unref_scans explicitly for every case, so its comments
describing 1 as the default are both unnecessary and, since the default is
now conditional, wrong.  Refer to the threshold values directly.

No functional change.

Link: https://lore.kernel.org/20260731-kmemleak_hardened-v2-3-7b9689ac77cb@debian.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:18 -07:00
Breno Leitao
8f07855f57 selftests: mm: test kmemleak's N-consecutive-scan leak confirmation 
Add a functional test for the min_unref_scans kmemleak module parameter. 
Using samples/kmemleak's helper module it checks that min_unref_scans=1
reports an orphan on the first scan, min_unref_scans=2 reports nothing on
the first scan but does on the second, and that the parameter reads back
what was written.

It counts only the helper module's own orphans (matched by their
[kmemleak_test] backtrace, with the module kept loaded so the symbols
resolve) so unrelated leaks already present on the system do not perturb
the result.  The test skips when run as non-root, without
CONFIG_DEBUG_KMEMLEAK / CONFIG_SAMPLE_KMEMLEAK, on a kernel without the
parameter, or when the helper yields no detectable orphan.

Link: https://lore.kernel.org/20260713-catalin_pto-v1-4-5b93b1131089@debian.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:18 -07:00
Abhishek Bapat
923690d809 kselftest: alloc_tag: extend the allocinfo ioctl kselftest 
Add the following 2 scenarios to the allocinfo ioctl kselftest:
1. Validate size based filtering
2. Validate lineno based filtering

The first test uses "do_init_module" as the candidate function for the
test.  This is because the associated site will only allocate memory when
a kernel module is loaded.  The return value of get_content_id() changes
every time modules are loaded or unloaded.  Hence, as long as
get_content_id() values at the start and the end of the test are the same,
the memory allocated by the do_init_module call site should also remain
the same.  Consequently, the test can assume consistency between the value
returned by the ioctl and the procfs resulting in less flakiness.

Link: https://lore.kernel.org/e5171926b48802531284c1cb5f04734017141341.1783532853.git.abhishekbapat@google.com
Signed-off-by: Abhishek Bapat <abhishekbapat@google.com>
Tested-by: Hao Ge <hao.ge@linux.dev>
Acked-by: Hao Ge <hao.ge@linux.dev>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Sourav Panda <souravpanda@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:13 -07:00
Abhishek Bapat
2f252a7a6c kselftest: alloc_tag: add kselftest for ioctl interface 
Introduce a kselftest to verify the new IOCTL-based interface for
/proc/allocinfo.  The test covers:

1. Validation of the filename filter.
2. Validation of the function filter.

The first test validates the functionality of the filename filter.  Using
"mm/memory.c" as the candidate filename filter, it retrieves filtered
entries from both procfs and ioctl and matches the first VEC_MAX_ENTRIES
entries.

The second test validates the functionality of the function filter.  It
uses "dup_mm" as the candidate function as we do not expect this function
name to change frequently and hence won't be needing to modify this test
often.

Note that both the tests match line no, function name and file name
fields.  Bytes allocated and calls are not matched as those values may
change in the time when the data is being read from procfs and ioctl and
hence can lead to false negatives.

[abhishekbapat@google.com: fix a typo in the selftest]
  Link: https://lore.kernel.org/e4e49ec4a5960292aeeb9e196526c18dc95228a2.1785867739.git.abhishekbapat@google.com
  Closes: https://sashiko.dev/#/patchset/cover.1783532853.git.abhishekbapat@google.com
Link: https://lore.kernel.org/e2a3795677a14aeab249758ba570cd5e98402032.1783532853.git.abhishekbapat@google.com
Signed-off-by: Abhishek Bapat <abhishekbapat@google.com>
Tested-by: Hao Ge <hao.ge@linux.dev>
Acked-by: Hao Ge <hao.ge@linux.dev>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Sourav Panda <souravpanda@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:13 -07:00
Ethan Nelson-Moore
22709abff9 mm: fix CONFIG_STACK_GROWSUP typo in tools/testing/vma/include/dup.h 
Commit 2b6a3f061f ("mm: declare VMA flags by bit") significantly
refactored the header file include/linux/mm.h.  In that step, it
introduced a typo in an ifdef, referring to a non-existing config option
STACK_GROWS_UP, whereas the actual config option is called STACK_GROWSUP.

Commit 40a4af52e0 ("mm: fix CONFIG_STACK_GROWSUP typo in mm.h") fixed
this typo in the mm.h header file, but did not update the copy of the code
in tools/testing/vma/include/dup.h.  Update this copy as well.

Commit message adapted from the above-referenced fix to mm.h.

Link: https://lore.kernel.org/20260611012258.432043-1-enelsonmoore@gmail.com
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:12 -07:00
Hongfu Li
4050b5b0b6 selftests/mm: fix read_file() return value check 
read_file() returns 0 on open/read failures and never returns negative
values.  Existing < 0 error checks never trigger, so read failures are
silently ignored.  Check for zero return to detect read_file() failures.

Also fix misleading error message in get_finfo().  The error string
incorrectly references read_num when reading uevent files.

Link: https://lore.kernel.org/20260807013555.36525-1-hongfu.li@linux.dev
Fixes: e0c13f9761 ("khugepaged: add self test")
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:11 -07:00
Muhammad Usama Anjum
746c94b7cb selftests/mm: retry migration failures for the full runtime 
move_pages() is best effort and can temporarily fail when concurrent
faults race with page unmapping.  A busy shared-anon workload can exhaust
the current 100 retries long before the intended 20-second runtime and
produce a false failure.

Use the full runtime as the retry window.  Since the initial page location
is unknown, require it to reach both alternating NUMA targets to confirm
that cross-node migration made progress despite transient contention.

Link: https://lore.kernel.org/20260727095225.372655-6-usama.anjum@arm.com
Signed-off-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:10 -07:00
Muhammad Usama Anjum
e14e52a7ce selftests/mm: skip hard dirty page-cache test on NFS 
The hard dirty_pagecache variant uses MADV_HWPOISON to exercise recovery
of a dirty file-backed page.  The recovery path records -EIO in the
address_space mapping, which NFS later reports when the test closes the
file.  This makes the test fail after the hwpoison checks have completed.

Skip this variant when the test file is on NFS.  Keep the hard clean-page
and both soft-offline variants enabled because they use folio removal,
invalidation, or migration rather than recording a delayed writeback
error.

The unsupported-filesystem path in clean_pagecache() also returns without
closing the opened test file.  Close the descriptor before skipping there
and in dirty_pagecache().

Link: https://lore.kernel.org/20260727095225.372655-5-usama.anjum@arm.com
Signed-off-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:09 -07:00
Muhammad Usama Anjum
e5220e4d93 selftests/mm: skip guard hole-punch test if MADV_REMOVE is unsupported 
The hole_punch case verifies that guard regions survive MADV_REMOVE and
that the backing range is punched out.  MADV_REMOVE delegates the hole
punch to the backing filesystem, which may reject the operation with
EOPNOTSUPP.

That result means the test cannot establish the state whose guard
semantics it intends to validate.  Treating the missing filesystem
capability as a guard-region failure creates a false regression.

Unmap the range and skip only when MADV_REMOVE fails with EOPNOTSUPP. 
Preserve the assertion for all other errors so failures on supported
configurations remain visible.

Link: https://lore.kernel.org/20260727095225.372655-3-usama.anjum@arm.com
Signed-off-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Acked-by: Usama Arif <usama.arif@linux.dev>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:09 -07:00
Muhammad Usama Anjum
4004c130c3 selftests/mm: skip COW tmpfile cases when fallocate() is unsupported 
Patch series "selftests/mm: Handle unsupported and transient test
conditions", v3.

Several MM selftests report failures when the test environment lacks
an underlying prerequisite, such as fallocate() support, MADV_REMOVE,
local page-cache semantics, or swap.

This series converts those unsupported cases to SKIP while preserving
failures for unexpected errors. It also allows migration tests to retry
transient move_pages() failures.


This patch (of 4):

The tmpfile-backed COW cases allocate a one-page file with fallocate()
before exercising private and shared mappings.  When the filesystem
backing tmpfile() does not implement fallocate(), setup fails with
EOPNOTSUPP and no COW behavior is exercised.

This occurs when the temporary directory resides on a filesystem with
limited allocation support, such as NFSv3.  Reporting a failure adds noise
because the test prerequisite is absent rather than the COW implementation
being broken.

Report EOPNOTSUPP as a skip.  Continue treating every other fallocate()
error as a failure so unexpected setup regressions remain visible.

Link: https://lore.kernel.org/20260727095225.372655-1-usama.anjum@arm.com
Link: https://lore.kernel.org/20260727095225.372655-2-usama.anjum@arm.com
Fixes: f8664f3c4a ("selftests/vm: cow: basic COW tests for non-anonymous pages")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Acked-by: Usama Arif <usama.arif@linux.dev>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:09 -07:00
Audra Mitchell
dc924f0f85 selftests/mm/vm_util.c: correct __pagemap_scan_get_categories return value 
Currently __pagemap_scan_get_categories returns the result from the ioctl
call which should be an int, not uint64_t.  The ioctl may return -1 on
error, which will be interpreted as UINT64_MAX.  Adjust the return type to
use the correct value.

Link: https://lore.kernel.org/20260806150339.1824251-2-audra@redhat.com
Signed-off-by: Audra Mitchell <audra@redhat.com>
Reviewed-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:08 -07:00
Hongfu Li
4b82a0b91b selftests/mm: drop duplicate test_seal_mprotect_two_vma_with_gap() call 
mseal_test main() invokes test_seal_mprotect_two_vma_with_gap() twice. 
The second run repeats all assertions with no benefit.  Drop the duplicate
call.

Link: https://lore.kernel.org/20260806030850.76077-1-hongfu.li@linux.dev
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: SJ Park <sj@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:08 -07:00
Baolin Wang
76f134aabb selftests: mm: add mTHP collapse test cases 
Added a new command 'mthp_khugepaged' for mTHP collapse, along with the
'-c' parameter to specify the collapse order.  Additionally, added mTHP
collapse test cases for 'collapse_full', 'collapse_empty', and
'collapse_single_mthp' for anonymous folios.  All khugepaged test cases
passed.

Link: https://lore.kernel.org/f260058520214a9611922a96326bc54ba282fb73.1785985999.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Tested-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Acked-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Acked-by: Zi Yan <ziy@nvidia.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:07 -07:00
Baolin Wang
6dedaf0d46 selftests: mm: implement the mTHP-sized hugepage check helpers 
Implement mTHP-sized hugepage checking helpers using
gather_folio_orders().  Also rename the existing PMD-sized huge page check
function to __check_pmd_huge() for clarity.

Link: https://lore.kernel.org/56b16691f605426b33b5cf47319233de6127a6b3.1785985999.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Tested-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Acked-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:07 -07:00
Baolin Wang
6995150ede selftests: mm: move gather_after_split_folio_orders() into vm_util.c file 
Move gather_after_split_folio_orders() to vm_util.c as a helper function
in preparation for implementing checks for mTHP collapse.  While we are at
it, rename this function to indicate that it is not only used for large
folio splits.

No functional changes.

Link: https://lore.kernel.org/30a0a99556adf11c2bf97aa08d6da4830bb43f6f.1785985999.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Tested-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:07 -07:00
Baolin Wang
e4ce743a8f selftests: mm: extend the check_huge() to support mTHP check 
Patch series "add anon mTHP collapse test cases", v3.


This patch (of 4):

To support checking for various sized mTHPs during mTHP collapse, extend
the check_huge() function prototype to accept two new parameters
specifying the address range and mTHP size, in preparation for the
following patches.

No functional changes.

Link: https://lore.kernel.org/cover.1785985999.git.baolin.wang@linux.alibaba.com
Link: https://lore.kernel.org/e5039cbc70f8de853e6c21048d65803a5fe41042.1785985999.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Tested-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:07 -07:00
Pratyush Mallick
2bee308f3a selftests/mm: use pattern matching in .gitignore 
The current .gitignore hardcodes each generated test binary by name,
requiring updates every time a new test is added.

Switch to the pattern-matching approach similar to KVM:selftests.  Ignore
everything by default and then allow source extensions (.c, .h, .sh) and
tracked non-source files.

Note that local_config.h was renamed to local_config.h_gen in a previous
patch so that un-ignoring *.h files does not cause generated build
artifacts to become untracked.

[akpm@linux-foundation.org: fix botched merge resolution]
Link: https://lore.kernel.org/20260803221732.3651981-3-pratmal@google.com
Signed-off-by: Pratyush Mallick <pratmal@google.com>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Suggested-by: Yosry Ahmed <yosry@kernel.org>
Reviewed-by: SJ Park <sj@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Liam R. Howlett" <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:02 -07:00
Warren Xiong
8bc69b8d20 selftests/mm: read memory information without popen 
read_memory_info() invokes two shell pipelines to obtain MemFree and
Hugepagesize from /proc/meminfo.  It does not check whether popen()
returns NULL before passing the result to fgets(), and it does not call
pclose() when fgets() fails.

Open /proc/meminfo directly and obtain both values in a single pass.  This
removes the unchecked NULL path, closes the file on all paths, and avoids
dependencies on external commands.

The compaction test continues to pass after this change.

Link: https://lore.kernel.org/1785845818-3131-1-git-send-email-warren.xiong@ugreen.com
Signed-off-by: Warren Xiong <warren.xiong@ugreen.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:01 -07:00
Pratyush Mallick
4e7e499b75 selftests/mm: rename local_config.h to local_config.h_gen 
Patch series "selftests/mm: use pattern matching in .gitignore", v4.

The current selftests/mm/.gitignore hardcodes each generated test binary
by name, which requires manual updates every time a new test is added.

This series switches to a pattern-matching approach (similar to KVM
selftests), ignoring everything by default and allowing specific source
extensions.  To accommodate this without tracking generated headers,
local_config.h is renamed to local_config.h_gen.


This patch (of 2):

Because local_config.h is a generated build artifact, un-ignoring all .h
files in .gitignore causes it to incorrectly show up as an untracked file
in git status.

Rename it to local_config.h_gen so it no longer matches the !*.h inclusion
rule, preparing for a subsequent patch that switches .gitignore to a
pattern-matching approach.

Update Makefile, check_config.sh, and affected test sources (cow.c,
gup_longterm.c) accordingly.

Link: https://lore.kernel.org/20260803221732.3651981-1-pratmal@google.com
Link: https://lore.kernel.org/20260803221732.3651981-2-pratmal@google.com
Signed-off-by: Pratyush Mallick <pratmal@google.com>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Suggested-by: David Hildenbrand <david@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Liam R. Howlett" <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Yosry Ahmed <yosry@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:43:01 -07:00
Lorenzo Stoakes (ARM)
fb580e1964 tools/testing/selftests/mm: test anonymous page offset merge behaviour 
While maintaining anonymous page offsets for VMAs has no impact for most
merge cases, it does impact MAP_PRIVATE-mapped file-backed mappings which
happen to have matching page offset but not matching anonymous page
offset.

Assert this behaviour by attempting to map an unfaulted MAP_PRIVATE-memfd
region with a faulted one with compatible file page offsets but
incompatible anonymous page offsets.

Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-16-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Gregory Price (Meta) <gourry@gourry.net>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:54 -07:00
Lorenzo Stoakes (ARM)
6b7460ad1a tools/testing/vma: expand VMA merge tests to assert anon pgoff 
Now we have introduced the VMA anonymous page offset attribute and update
it when VMAs are manipulated, update VMA merge tests to assert that the
anonymous page offset is as expected.

Also update instances where we could use vma_start_pgoff() to do so.

Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-15-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Gregory Price (Meta) <gourry@gourry.net>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:53 -07:00
Lorenzo Stoakes (ARM)
6a993c7fbc mm: propagate VMA anonymous page offset on map, remap, split + merge 
We must correctly update VMA anonymous page offset state on all VMA
operations that would result in it changing, with special attention given
to remapping.

We cover most cases by simply updating vma_set_range() to do so (with a
new anonymous page offset parameter), but also notably must update the
merging and mapping logic to propagate this parameter correctly.

The remap logic remains the same - we may update the anonymous page offset
if the VMA is unfaulted, but now this applies to MAP_PRIVATE file-backed
mappings too, so we update the code to reflect this.

Note that we use __linear_anon_page_index() upon remap as the VMA may be
shared, in order that we update the field consistently regardless of VMA
type.

Similarly, pass through anon page offset to the merge logic, updating the
vma_merge_struct struct to propagate it, and also use
__linear_anon_page_index() to obtain the anonymous page index so it can be
safely used for both shared and MAP_PRIVATE file-backed mappings.

In copy_vma(), the anonymous page offset is updated regardless of whether
the mapping is a CoW mapping or not.  This is both to keep the anonymous
page offset consistent even for non-CoW mappings (it is set so should at
least remain correct) and makes the logic cleaner.

A self-merge however remains permitted only for mappings which can have a
populated vma->anon_vma and do not require alignment on a separate file
offset - that is pure anonymous VMAs, so only set can_self_merge if
vma_is_anonymous().

Finally, we update insert_vm_struct() to correctly set the anonymous page
offset on insertion of a VMA.

We simply ensure state is correctly propagated here, so no functional
changes are intended.

Also update VMA userland tests to reflect this change.

Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-9-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Gregory Price (Meta) <gourry@gourry.net>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:52 -07:00
Lorenzo Stoakes (ARM)
746b9e0a47 tools/testing/vma: add tests for copy_vma() self-merge 
Assert that a VMA can be moved backwards, forwards and between a preceding
VMA and its old self.

In the cases in which the VMA merges only with itself expect that to be
achieved by expanding its old self, so assert that these function
correctly.

However in the case of a merge between a preceding VMA and itself the
original VMA is removed, so assert that the preceding VMA replaces the one
passed in as vmap and the merge is as expected.

Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-8-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Gregory Price (Meta) <gourry@gourry.net>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:51 -07:00
Lorenzo Stoakes (ARM)
9998bc06d7 mm/vma: fix self-merge check in copy_vma() 
The existing logic is very confusing so improve things.  Firstly rename
the confusing faulted_in_anon_vma variable to can_self_merge and update
this when the page offset is updated.

What is being checked for is a 'self-merge' - that is between the VMA
being remapped and its prior VMA (remember that this is copy_vma() - if a
non-MREMAP_DONTUNMAP remap the original VMA is only removed afterwards).

This can happen if the VMA is moved immediately adjacent to itself, either
before or after it:

		|----------------|----------------|
		|		 |                |
		v		 |		  v
	|...............||---------------||...............|
	|      new      ||      old      ||      new      |
	|...............||---------------||---------------|

In these cases the old VMA is simply expanded to cover the new range.

It is also possible for the move to both self-merge and merge with a prior
VMA if it is placed between a preceding VMA and its old self:

				|---------------|
				|		|
				v		|
	|---------------||...............||---------------|
	|      prev     ||     new       ||     old       |
	|---------------||...............||---------------|

In this case, the old VMA is removed and 'prev' is expanded and replaces
it.

Since copy_vma_and_data() which calls copy_vma() intends to reference the
old VMA after the merge, it must have this pointer updated.

This kind of self-merge is not possible with a succeeding merge, as the
merge always prefers to expand the preceding VMA if possible.

copy_vma() accounts for this by explicitly checking to see if a self-merge
occurred and updating the vmap pointer if so.  However it incorrect did so
even for a subsequent merge (this is simply a noop so it had no impact).

So change this to only check for the case which matters - a backwards
merge - and rearrange the parameters to make it clearer we're doing that -
i.e.  check new_vma->vm_start < old_vma_start (having already renamed
vma_start to old_vma_start to make it clear this is the previous VMA).

Also update the existing wall-of-text comment to be a lot clearer.

While we're here, replace the VM_BUG_ON_VMA() with a VM_WARN_ON_ONCE_VMA()
and update the VMA userland tests accordingly.

No functional change intended.

Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-7-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Gregory Price (Meta) <gourry@gourry.net>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:51 -07:00
Lorenzo Stoakes (ARM)
7e6543d1f9 mm: introduce linear_anon_page_index() 
This function provides the anonymous equivalent of linear_page_index(),
instead offsetting based on the anonymous page offset of the VMA.

It is valid only for anonymous or MAP_PRIVATE file-backed mappings, in
other words CoW mappings.

For pure anon VMAs, this will be equal to linear_page_index().

Assert that both of these invariants are true in linear_anon_page_index()
and implement the algorithm in __linear_anon_page_index().

Note that MAP_PRIVATE-/dev/zero mappings will satisfy vma_is_anonymous()
but not fulfill this invariant, so when asserting this we check
vma->vm_file to account for this.

We do not update callsites yet, so no functional change intended.

Also const-ify vma_is_anonymous() to make it compatible with the
const-ified linear_anon_page_index().

While we're here, update linear_page_index() to be more succinct.

VMA userland tests are also updated accordingly.

Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-3-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Gregory Price (Meta) <gourry@gourry.net>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:50 -07:00
Lorenzo Stoakes (ARM)
51943a18ad mm: provide vma_[flags_]is_cow_mapping() and remove is_cow_mapping() 
All remaining callers of is_cow_mapping() are invoking it in the form of
is_cow_mapping(vma->vm_flags) or an indirected version of this.

Therefore, provide a helper - vma_is_cow_mapping() to directly test the
VMA.

Additionally provide a new helper vma_flags_is_cow_mapping() which
performs the check using the new vma_flags_t type, and share this logic
between vma_is_cow_mapping() and vma_desc_is_cow_mapping().

With these changes, no callers of is_cow_mapping() remain, so remove it.

Also update the userland VMA tests to reflect the change.

No functional change intended.

[akpm@linux-foundation.org: fix kerneldoc comment typo, per Lorenzo]
  Link: https://lore.kernel.org/aob1goSSPH6sTN9y@gremlin
Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-2-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Gregory Price (Meta) <gourry@gourry.net>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:50 -07:00
Lorenzo Stoakes (ARM)
0bd14001eb mm/vma: introduce VMA anon page offset field and add helpers 
Patch series "mm/rmap: index MAP_PRIVATE file-backed folios by anonymous
pgoff", v5.

In memory management we've managed to manufacture a great deal of
confusion around the concept of anonymous memory.  We have:

1. 'Pure anon' memory - anonymous VMAs whose folios are anonymous and
   swap-backed (thus for reclaim purposes, treated as anonymous). These are
   simple enough.

2. shmem - file-backed VMAs, file-backed folios (from rmap perspective) so
   present in the page cache and mapped by an address_space object, but
   whose folios are also swap-backed (thus treated as anonymous for reclaim
   purposes).

3. MAP_PRIVATE-mapped /dev/zero - a strange beast whose VMAs have
   vma->vm_file set, but which clears vma->vm_ops to satisfy
   vma_is_anonymous(), resulting in VMAs that were mmap()'d referencing a
   file, but are in every other sense anonymous, including the folios.

4. Other MAP_PRIVATE-file backed mappings - These possess file-backed VMAs
   and have file-backed folios until CoW'd, at which point those CoW'd
   folios are anonymous.

This series fixes issue 3.

In order for us to traverse VMAs using the reverse mapping, we require two
fields - folio->mapping and folio->index.  The first tells the rmap code
where to look for VMAs, and the second tells it at which offset the folio
starts within the referenced object.

For anonymous folios, folio->mapping points at an anon_vma object.  For
file-backed folios, it points at an address_space.  And:

* For file-backed folios folio->index is simply the page offset of the start
  of the folio within the file.

* For anonymous folios belonging to pure anon mappings, folio->index is
  equal to the anonymous page offset of the folio.

* For anonymous folios belonging to file-backed mappings (i.e. CoW'd folios
  of a MAP_PRIVATE file-backed mapping), folio->index is equal to the file
  page offset.

This series establishes a new anonymous page offset property of VMAs to
allow us to map anonymous folios at their anonymous page offset,
consistent with pure anon.

The purpose of doing so is to lay the foundations for the scalable CoW
work.  This is necessary because scalable CoW looks in the maple tree for
the VMA located at folio->index << PAGE_SHIFT, before falling back to
looking up tracked remaps if necessary.

The MAP_PRIVATE file-backed case means that folio indices will very often
conflict with one another and this remap tracking becomes substantially
more contended, and of course the fast path can never be used.

This also makes it possible, in future, to unshare anonymously mapped
folios with deep fork hierarchies on remap, eliminating the need for remap
tracking in the vast majority of cases.

Similar to page offset of pure anonymous VMAs, we update the anonymous
page offset of unfaulted file-backed VMAs on remap, but do not once CoW'd
(i.e.  vma->anon_vma is non-NULL).

Overall, there is little impact on mergeability, which remains exactly the
same for pure anonymous and shared file-backed mappings, with the only
impact being on MAP_PRIVATE-mapped file-backed mappings, which must now
match on anonymous page offset as well as file page offset to be merged.

To fail to merge like this would require CoW'ing the mapping, then finding
another VMA with identical file and compatible page offset to remap next
to.

This is therefore very much an edge case that should have very little
impact (and which scalable CoW may very well address in any case).


This patch (of 16):

Establish fields in vm_area_struct to store the anonymous page offset of
VMAs.

Initially, the anonymous page offset of a VMA is vma->vm_start >>
PAGE_SHIFT.

When a VMA is remapped to new_address its anonymous page offset is either
updated to new_address >> PAGE_SHIFT if unfaulted or, if faulted, remains
equal to the anonymous page offset it had when first faulted.

Currently, anonymous folios belonging to CoW'd MAP_PRIVATE-mapped
file-backed VMAs are tracked by their file offsets.  By adding anonymous
offset as a property of VMAs, we can now track them by their anonymous
page offset instead.

By tracking this, we provide the means by which to eliminate this
inconsistency, and more importantly lay the foundations for future work
for the scalable CoW anonymous rmap rework.

This patch simply adds the fields and some simple helpers.  Subsequent
patches will update mm code to make use of these fields correctly.

The fields chosen are packed in the VMA such that, for 64-bit kernel
builds, no additional space is taken up.

The first field is present on cacheline 0 containing key VMA fields, and
the second on cacheline 3, which contains file-backed reverse mapping
fields.

Given the relative time spent accessing reverse mapping fields as well as
updating them, there shouldn't be any performance impact here from false
sharing.

Update the VMA userland tests to account for this change.

No callsites are updated yet, so no functional change intended.

Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-0-c21581c0c3c8@kernel.org
Link: https://lore.kernel.org/20260813-b4-scalable-cow-virt-pgoff-v5-1-c21581c0c3c8@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Gregory Price (Meta) <gourry@gourry.net>
Reviewed-by: Xu Xin <xu.xin16@zte.com.cn>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Harry Yoo <harry@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ray <Ray.Huang@amd.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-08-24 18:42:49 -07:00
Linus Torvalds
5b05bb3f6c platform-drivers-x86 for v7.3-1 
Highlights:
 
 - amd/halo: Add Halo RGB LED driver
 
 - amd/hsmp:
   - Properly serialize probe, remove, and data paths
   - Add support for protocol v7 used by Family 1AH Model 80H
   - Fix error checking corner cases (largely from AI review)
   - Reject negative power cap
 
 - amd/pmc:
   - Improve behavior on platforms that do not support STB
   - Add T14 Gen2 AMD (20XL) to s2idle quirk list
 
 - amd/pmf:
   - Add ioctl interface to retrieve device metrics
   - Add support for new metrics tables used by Family 1AH Model 80H
 
 - arm64: qcom-hamoa-ec: Reject short responses
 
 - asus-nb-wmi: Support ProArt key on ASUS ProArt PX13
 
 - asus-armoury:
   - Gate PPT writes behind active fan curve
   - Add power limits for more models
 
 - dell-wmi-base: Fix handling of ultra performance key
 
 - dell-wmi-sysman: Don't hex dump attribute security buffer
 
 - hp-bioscfg:
   - Various fixes
   - Improve reduced ACPI packages support (necessary for HP EliteBook 840 G2)
 
 - lg-laptop:
   - Fix LED resource handling
   - Add support for events used in newer models
   - Fix keyboard backlight support on LG Gram 16T90SP
 
 - hp-wmi:
   - Generalize thermal params to board params
   - Manage CPU and GPU PWM independently
   - Add GPU MUX switch support
   - Add Victus 15-fb0xxx support
   - Add OMEN MAX 16-ak0xxx, OMEN 16-n0xxx, OMEN 16-wd0xxx, OMEN
     16-wf0xxx, and OMEN board ID 8D88 support
   - Add OMEN Transcend 16-u0xxx support
 
 - huawei: Add support for Fn-lock ACPI interface found on newer Huawei
           laptops such as MateBook 14 2024
 
 - ISST:
   - Improve input validation (many fixes)
   - Disallow SST-CP (core-power) feature if perf profile add fails
 
 - lenovo/yb9-kbdock: Add driver for Yoga Book 9 14IAH10
 
 - lenovo/ymc:
   - Extend hinge switch query to support Yoga 9 2-in-1 14IPH11
   - Prevent loading on Yoga Book 9 14IAH10 to avoid duplicated input
     nodes
 
 - msi-ec: Add MSI Raider A18 HX A9WJG and MSI Katana GF76 11UEK support
 
 - msi-wmi: Add MSI Claw M-Center keys support
 
 - oxpec: Add support for OneXPlayer X2 Mini Pro
 
 - redmi-wmi: Report kbd backlight cycle, OEM preset power mode, and FnLock
              toggle events to userspace
 
 - samsung-galaxybook: Add Samsung Galaxy Book6 Pro support
 
 - thinkpad_acpi: Add USB-C Security support
 
 - uniwill-laptop:
   - Add keyboard backlight, AC auto boot, and USB powershare support
   - Add MACHENIKE L16 Pro, AiStone X4SP4NAL, and Avell A60 MUV support
   - Make lightbar max brightness configurable and add support for
     LAPQC71A/B
 
 - Major refactoring efforts:
   - Stop setting acpi_device_name/class() and pnp.device_class to
     faciliate their eventual removal
 
 - Many rollback/remove path fixes (presumably mostly found by AI)
 
 - Miscellaneous cleanups / refactoring / improvements
 
 The following is an automated shortlog grouped by driver:
 
 acer-wmi:
  -  reject missing gaming WMI results
 
 amd/hsmp:
  -  ACPI HSMP refcounted sockets and coordinated release
  -  Add HSMP messages for Family 1Ah, Model 50h-5Fh
  -  Add IOCTL_GET_TELEMETRY_DATA for metric table reads
  -  Clear mdev.this_device on deregister
  -  Enable protocol version 7 metric tables on the ACPI driver
  -  Gate the data plane on a fully initialized socket
  -  Map the metric table with ioremap() and unmap it explicitly
  -  Pass struct device explicitly to ACPI mailbox parsers
  -  Reject negative power cap writes in hwmon
  -  Serialize ACPI HSMP probe and remove with an rwsem
  -  Serialize per-socket metric table reads with a mutex
  -  Serialize the data plane against socket teardown
  -  Source metric-table size from firmware
  -  Unify response_sz validation to an upper-bound check
  -  Validate ACPI UID before parsing socket index
  -  Validate _DSD mailbox sub-package element count
 
 amd:
  -  Introduce Halo Box RGB LED driver
 
 amd/pmc:
  -  Add T14 Gen2 AMD (20XL) to s2idle quirk list
  -  Do not fail probe when STB init fails
  -  Fix LPS0 and debugfs leaks when STB init fails
  -  Fix msg_port restoration in amd_stb_debugfs_open_v2()
  -  Only expose stb_read after telemetry buffer is mapped
  -  Propagate SMU errors and validate S2D address
  -  Restore msg_port on amd_stb_s2d_init() error paths
 
 amd/pmf:
  -  Add 1AH_M80H device IDs and extended SMU mailbox registers
  -  Add 1AH_M80H metrics table and NPU metrics support
  -  Add missing newline in dev_err message
  -  Add util layer and userspace character device interface
  -  Implement util layer ioctl handler
  -  Introduce AMD PMF testing tool for driver metrics and features
  -  Move debug helper functions to UAPI header
  -  Move metrics code to dedicated file
  -  Refactor NPU metrics for platform extensibility
  -  store BIOS output values for user-space metrics via util IOCTL
  -  Store commonly used enums in the header file
  -  Use per-SoC smu_regs struct for SMU mailbox registers
  -  Use upper/lower_32_bits() in amd_pmf_set_dram_addr()
 
 arm64: qcom-hamoa-ec:
  -  reject incomplete responses
 
 asus-armoury:
  -  Add power limits for ROG Strix SCAR 16 (G635LX)
  -  Add power limits quirk for FA401KM
  -  Add power limits quirk for FA608WV
  -  add support for FX517ZR
  -  add support for HN7306EA and HN7306EAC
  -  fix Use-After-Free and memory leak in driver init
  -  gate PPT writes behind active fan curve
  -  use cleanup.h to manage tunables
 
 asus-laptop:
  -  Stop setting acpi_device_name/class()
 
 asus-nb-wmi:
  -  map ProArt key (0x8b) to KEY_PROG3
 
 asus-wireless:
  -  Fail probe when there is no ACPI match
 
 asus-wmi:
  -  fix resource leaks on probe failure
 
 dell-ddv:
  -  Use no_free_ptr() to simplify error handling
 
 dell-privacy:
  -  Fix race condition
 
 dell-smbios:
  -  Pass device to callbacks
 
 dell-smbios-wmi:
  -  Fix chardev resource management
  -  Replace global list with single item
 
 dell-wmi-base:
  -  Fix handling of ultra performance key
  -  Fix resource leak on module load failure
 
 dell-wmi-sysman:
  -  Don't hex dump attribute security buffer
  -  Fix instance ID bounds
 
 Documentation/ABI:
  -  add testing entry for AMD PMF character device interface
 
 eeepc-laptop:
  -  Stop setting acpi_device_name/class()
 
 fujitsu-laptop:
  -  Stop setting acpi_device_name/class()
 
 fujitsu-tablet:
  -  Stop setting acpi_device_name/class()
 
 hp-bioscfg:
  -  accept reduced ACPI packages from older HP BIOS
  -  advance elem past consumed array elements
  -  bound ordered-list parsing by the package count
  -  fix heap OOB read in sk_store() and kek_store()
  -  fix heap OOB read on empty password write
  -  fix new_password_store() overwriting current_password
  -  fix off-by-one write in hp_get_string_from_buffer()
  -  fix ORD_LIST_ELEMENTS never being parsed
  -  fix password encoding bounds check
  -  pass validated element count to package parsers
  -  warn on element type mismatch instead of failing
 
 hp-wmi:
  -  Add dual-channel PWM fan control
  -  Add GPU MUX switch support
  -  Add OMEN board 8A43 thermal profile support
  -  Add OMEN board 8BA9 thermal profile support
  -  Add OMEN board 8BAA thermal profile support
  -  Add OMEN board 8D88 thermal profile support
  -  Add OMEN Transcend 16 8BB3 support
  -  Add support for OMEN MAX 16-ak0xxx (8DD6)
  -  Add Victus 15-fb0xxx support
  -  Drive fan control from board data
  -  Introduce board-specific feature data
 
 huawei-wmi:
  -  add ACPI fallback for Fn-lock on newer models
 
 ideapad-laptop:
  -  Fix driver unregistration order
 
 int1092:
  -  Fix info leak in parse_package()
  -  Fix potential memory leak in sar_probe()
 
 intel/pmc:
  -  initialize empty PMT read result
 
 ishtp_eclite:
  -  Fix ACPI device reference leak in probe error path
 
 ISST:
  -  Add a NULL check for sst_inst[]
  -  Just allow 2 bits for SST feature enable
  -  Return error during profile addition
  -  Use PP level enable mask
  -  Validate level in perf mask ioctls
  -  Validate logical CPU id and clos id
  -  Validate max level for set feature
  -  Validate parameter for core power state
  -  Validate parameter for frequency and priority
  -  Validate socket ID in clos_assoc ioctl
 
 lenovo:
  -  Add Yoga Book 9 keyboard dock detection driver
 
 lenovo: lenovo-ymc:
  -  Suppress probe on Yoga Book 9 14IAH10
 
 lenovo/ymc:
  -  Only match lower byte in WMI lid switch query response
 
 lg-laptop:
  -  Add support for additional events
  -  Add support for native ACPI events
  -  Fix keyboard backlight support on LG Gram 16T90SP
  -  Fix LED resource handling
  -  Improve WMAB control method support
 
 MAINTAINERS:
  -  update Intel PMC Core maintainer contact
 
 mlxbf-bootctl:
  -  fix the build error with FIELD_PREP()
 
 mlxbf-pmc:
  -  Check ACPI_COMPANION() against NULL
 
 msi-ec:
  -  Add MSI Katana GF76 11UEK EC firmware
  -  Add MSI Raider A18 HX A9WJG EC firmware
 
 msi-wmi:
  -  Add MSI Claw M-Center keys
  -  Reformat msi_wmi_notify()
 
 oxpec:
  -  Add support for OneXPlayer X2 Mini Pro
 
 panasonic-laptop:
  -  Fix sentinel write past pcc->sinf[]
  -  Stop setting acpi_device_name/class()
 
 power: supply: surface_{battery,charger}:
  -  Consistently define ssam_device_ids using named initializers
 
 redmi-wmi:
  -  report EC state change events
 
 samsung-galaxybook:
  -  Add SAMB430 device ID
 
 sony-laptop:
  -  Stop setting acpi_device_class()
 
 sonypi:
  -  Stop setting acpi_device_name/class()
 
 surface: acpi-notify:
  -  Check ACPI companion before use
 
 surface: aggregator:
  -  Consistently define ssam_device_ids using named initializers
 
 surface: surfacepro3_button:
  -  Stop setting acpi_device_name()
 
 think-lmi:
  -  Fix certificate thumbprint sysfs output
  -  Fix current password length check
  -  Free system certificate signatures
 
 thinkpad_acpi:
  -  Add USB-C Security (USCS) support
  -  Fix fan speed reporting on Edge E330
  -  Fix USB-C Security probe failure on unsupported platforms
  -  Stop setting acpi_device_class()
 
 topstar-laptop:
  -  Stop setting acpi_device_name/class()
 
 toshiba_acpi:
  -  Do not use uninitialized device_class
 
 toshiba_bluetooth:
  -  Use more common error handling code in toshiba_bt_rfkill_probe()
 
 toshiba_haps:
  -  Do not use uninitialized device_class
 
 uniwill-laptop:
  -  Add 2 new feature defines for TUXEDO devices
  -  Add AC auto boot support
  -  Add Avell A60 MUV support
  -  Add keyboard backlight support
  -  Add lightbar support for LAPQC71A/B
  -  Add support for the AiStone X4SP4NAL
  -  Add support for the MACHENIKE L16 Pro
  -  Add support for USB powershare
  -  Handle screen-related events
  -  Remove single color keyboard detection
  -  Split uniwill_kbd_led_init()
 
 x86/platform/olpc: xo15:
  -  Stop setting acpi_device_name/class()
 
 xo15-ebook:
  -  Stop setting acpi_device_name/class()
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQSCSUwRdwTNL2MhaBlZrE9hU+XOMQUCaow0EgAKCRBZrE9hU+XO
 MRvYAP412gjYokIoj6ncE2OD897gX2d5BwUVKkraQHoevxLm8wEAikY+iYbdOv3a
 fqhPeCDZSRBn6yEBHewY7cdotNDn2go=
 =d/Uf
 -----END PGP SIGNATURE-----

Merge tag 'platform-drivers-x86-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Ilpo Järvinen
 "Highlights:

  Major refactoring effort: stop setting acpi_device_name/class() and
  pnp.device_class to facilitate their eventual removal

  Many rollback/remove path fixes (presumably mostly found by AI)

  Miscellaneous cleanups / refactoring / improvements

  amd/halo:
   - Add Halo RGB LED driver

  amd/hsmp:
   - Properly serialize probe, remove, and data paths
   - Add support for protocol v7 used by Family 1AH Model 80H
   - Fix error checking corner cases (largely from AI review)
   - Reject negative power cap

  amd/pmc:
   - Improve behavior on platforms that do not support STB
   - Add T14 Gen2 AMD (20XL) to s2idle quirk list

  amd/pmf:
   - Add ioctl interface to retrieve device metrics
   - Add support for new metrics tables used by Family 1AH Model 80H

  qcom-hamoa-ec (arm64):
   - Reject short responses

  asus-nb-wmi:
   - Support ProArt key on ASUS ProArt PX13

  asus-armoury:
   - Gate PPT writes behind active fan curve
   - Add power limits for more models

  dell-wmi-base:
   - Fix handling of ultra performance key

  dell-wmi-sysman:
   - Don't hex dump attribute security buffer

  hp-bioscfg:
   - Various fixes
   - Improve reduced ACPI packages support (necessary for HP EliteBook 840 G2)

  lg-laptop:
   - Fix LED resource handling
   - Add support for events used in newer models
   - Fix keyboard backlight support on LG Gram 16T90SP

  hp-wmi:
   - Generalize thermal params to board params
   - Manage CPU and GPU PWM independently
   - Add GPU MUX switch support
   - Add Victus 15-fb0xxx support
   - Add OMEN MAX 16-ak0xxx, OMEN 16-n0xxx, OMEN 16-wd0xxx, OMEN
     16-wf0xxx, and OMEN board ID 8D88 support
   - Add OMEN Transcend 16-u0xxx support

  huawei:
   - Add support for Fn-lock ACPI interface found on newer Huawei
     laptops such as MateBook 14 2024

  ISST:
   - Improve input validation (many fixes)
   - Disallow SST-CP (core-power) feature if perf profile add fails

  lenovo/yb9-kbdock:
   - Add driver for Yoga Book 9 14IAH10

  lenovo/ymc:
   - Extend hinge switch query to support Yoga 9 2-in-1 14IPH11
   - Prevent loading on Yoga Book 9 14IAH10 to avoid duplicated input
    nodes

  msi-ec:
   - Add MSI Raider A18 HX A9WJG and MSI Katana GF76 11UEK support

  msi-wmi:
   - Add MSI Claw M-Center keys support

  oxpec:
   - Add support for OneXPlayer X2 Mini Pro

  redmi-wmi:
   - Report kbd backlight cycle, OEM preset power mode, and FnLock
     toggle events to userspace

  samsung-galaxybook:
   - Add Samsung Galaxy Book6 Pro support

  thinkpad_acpi:
   - Add USB-C Security support

  uniwill-laptop:
   - Add keyboard backlight, AC auto boot, and USB powershare support
   - Add MACHENIKE L16 Pro, AiStone X4SP4NAL, and Avell A60 MUV support
   - Make lightbar max brightness configurable and add support for
     LAPQC71A/B"

* tag 'platform-drivers-x86-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (152 commits)
  platform/x86: think-lmi: Fix current password length check
  platform/x86: redmi-wmi: report EC state change events
  MAINTAINERS: update Intel PMC Core maintainer contact
  platform/x86: oxpec: Add support for OneXPlayer X2 Mini Pro
  platform/x86: thinkpad_acpi: Fix fan speed reporting on Edge E330
  platform/x86: msi-ec: Add MSI Katana GF76 11UEK EC firmware
  platform/x86: think-lmi: Fix certificate thumbprint sysfs output
  mlxbf-bootctl: fix the build error with FIELD_PREP()
  platform/x86: think-lmi: Free system certificate signatures
  platform/x86: ISST: Add a NULL check for sst_inst[]
  platform/x86: ISST: Return error during profile addition
  platform/x86: ISST: Just allow 2 bits for SST feature enable
  platform/x86: ISST: Use PP level enable mask
  platform/x86: ISST: Validate parameter for frequency and priority
  platform/x86: ISST: Validate parameter for core power state
  platform/x86: ISST: Validate max level for set feature
  platform/x86: ISST: Validate logical CPU id and clos id
  platform/x86: ISST: Validate level in perf mask ioctls
  platform/x86: ISST: Validate socket ID in clos_assoc ioctl
  platform/x86/amd/hsmp: Reject negative power cap writes in hwmon
  ...
 2026-08-24 10:16:35 -07:00
Paolo Bonzini
76671054f9 KVM/arm64 changes for 7.3 
- Add support for 'slot' based PMU events, paired with new UAPI that
    compels the user to select a specific PMU implementation
 
  - Lazy save/restore of vCPU state for pKVM, along with various fixes
    and cleanups to the management of vCPU state between the untrusted
    host and pKVM hypervisor
 
  - Disable traps of EL1 registers for nested hypervisors when FEAT_NV2p1
    is present, guaranteeing that EL2-specific register bits are stateful
    in the EL1 counterpart
 
  - Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the scope
    of those instructions remains 'in host' (i.e. L1 kernel/userspace)
 
  - Pile of fixes for the management of the VNCR pseudo-TLB, such as
    under-invalidations and races with concurrent TLBIs on other vCPUs
 
  - Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
    runtime-patched constant, allowing the same data to be shared with
    pKVM prior to dropping host privileges
 
  - Considerable pile of LLM-assisted fixes around the shop but mostly in
    the VGIC, our in-kernel generator of bugs (and sometimes interrupts)
 -----BEGIN PGP SIGNATURE-----
 
 iI0EABYKADUWIQSNXHjWXuzMZutrKNKivnWIJHzdFgUCaoZ/khccb2xpdmVyLnVw
 dG9uQGxpbnV4LmRldgAKCRCivnWIJHzdFkK7AP9zvAcDf+DVte8+mZjCMDrvNB1n
 UWsBnQkdZ1nDDYBJlwD8D1pvurK4ZV3UIl68IgpTqYKhMspCuOWDHrnBt1QyqQU=
 =2iPX
 -----END PGP SIGNATURE-----

Merge tag 'kvmarm-7.3' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 changes for 7.3

 - Add support for 'slot' based PMU events, paired with new UAPI that
   compels the user to select a specific PMU implementation

 - Lazy save/restore of vCPU state for pKVM, along with various fixes
   and cleanups to the management of vCPU state between the untrusted
   host and pKVM hypervisor

 - Disable traps of EL1 registers for nested hypervisors when FEAT_NV2p1
   is present, guaranteeing that EL2-specific register bits are stateful
   in the EL1 counterpart

 - Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the scope
   of those instructions remains 'in host' (i.e. L1 kernel/userspace)

 - Pile of fixes for the management of the VNCR pseudo-TLB, such as
   under-invalidations and races with concurrent TLBIs on other vCPUs

 - Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
   runtime-patched constant, allowing the same data to be shared with
   pKVM prior to dropping host privileges

 - Considerable pile of LLM-assisted fixes around the shop but mostly in
   the VGIC, our in-kernel generator of bugs (and sometimes interrupts)
 2026-08-24 12:42:07 -04:00
Jimmy Zuber
60dbcce156 selftests/fuse: test post-EOF page zeroing when a file is extended 
Add a regression test for the bug where extending a file left the tail of
the old partial EOF page exposing stale mmap-dirtied data instead of zeros.

The test is a self-contained raw /dev/fuse server (no libfuse dependency)
that runs without writeback_cache and returns FOPEN_KEEP_CACHE, the
configuration in which the bug is visible.  Its backing data is always zero
in the hole, so any non-zero byte a read sees is stale page-cache data.
All offsets are relative to the runtime page size.  Four cases:

  - write_extend: pollute the post-EOF tail, extend past it by writing into
    a later page, and verify the tail reads back as zero;
  - ftruncate_extend: same, but extend via ftruncate();
  - fallocate_extend: same, but extend via fallocate() at the old EOF;
  - extend_into_eof_page_preserves_data: an extending write landing inside
    the old EOF page must not be clobbered by the zeroing.

Each case fails without the fix and passes with it.

Signed-off-by: Jimmy Zuber <jamz@amazon.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 2026-08-24 12:18:02 +02:00
Linus Torvalds
388b607d10 EFI updates for v7.3 
- Set a timeout for EFI runtime service completions, and declare the
   firmware wedged if it is exceeded. Note that this requires special
   handling in case the firmware does return after all.
 
 - Rate limit the efivarfs statfs() handler as the QueryVariableInfo()
   runtime service can be costly
 
 - Sanity check the size of struct properties_header on Mac/x86
 
 - Tweak the prototype of efi_guid_to_str()
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQQQm/3uucuRGn1Dmh0wbglWLn0tXAUCaoqdVQAKCRAwbglWLn0t
 XAb1AP9DIuHIAYlD4j8FKXcJtq1O/MzOadE3c4fNIdTPlTeUaAD8CAP0gHG3iRvc
 G265QOG2tjmmnFbCe+R8JVSdXBwCEAU=
 =GNJQ
 -----END PGP SIGNATURE-----

Merge tag 'efi-next-for-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi

Pull EFI updates from Ard Biesheuvel:

 - Set a timeout for EFI runtime service completions, and declare the
   firmware wedged if it is exceeded. Note that this requires special
   handling in case the firmware does return after all

 - Rate limit the efivarfs statfs() handler as the QueryVariableInfo()
   runtime service can be costly

 - Sanity check the size of struct properties_header on Mac/x86

 - Tweak the prototype of efi_guid_to_str()

* tag 'efi-next-for-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  efivarfs: Rate limit statfs() handler
  efi: apple-properties: validate setup data header length
  efi: make efi_guid_to_str() take a const GUID pointer
  efi/runtime-wrappers: retire the worker if a wedged call ever returns
  efi/runtime-wrappers: honour EFI_RUNTIME_SERVICES in the non-blocking paths
  efi/runtime-wrappers: bound the wait for EFI runtime service calls
  efi/runtime-wrappers: check EFI_RUNTIME_SERVICES before using efi_rts_work
  efi/runtime-wrappers: handle queue_work() failure with goto exit
  efi/runtime-wrappers: factor out efi_rts_park_worker()
  efi: fix stale reference to efi_recover_from_page_fault()
 2026-08-23 09:24:34 -07:00
Linus Torvalds
91959a31a3 kho: make boot time huge page allocation work nicely with KHO 
Today allocation of gigantic pages in HugeTLB cannot work reliably with KHO:
 
 * HugeTLB allocates gigantic pages using memblock and autoscaling of KHO
   scratch accounts for these allocations. When gigantic pages occupy half
   of the memory of more, KHO fails to allocate its scratch memory.
 * After kexec handover, memblock allocations exclusively use KHO scratch
   that is not supposed to contain preserved memory. This essentially blocks
   preservation of HugeTLB with gigantic pages.
 
 Extend early memory pools available for KHO kernel with areas that are
 guaranteed not to contain preserved memory.
 -----BEGIN PGP SIGNATURE-----
 
 iQEzBAABCgAdFiEEeOVYVaWZL5900a/pOQOGJssO/ZEFAmqK9NwACgkQOQOGJssO
 /ZGN3wgAqX/mXawYnhwDW2J931VsT54RuEctSNTCZ4Va8CWfeVjSV2bD2BlM+ibi
 VtsvEAIdKb8tyx3t+3JLR3jrANE5XcxeDiS7sJG7QWaek6G++GdAmrm7q98rU7Pc
 rqX8kMf65AZpHuV5wzKgF1fuYYur5Y4sKK00GVq+hPyWshmeYhaa+nGtJNe67D1a
 CFw38r5WAPs/DwyvWg/3yfupbgTG6OShHPnKxqR7aaOJE4YnD3snsBM7hot/ZI7e
 kz4TqixkxKn1RXq0XDcj8w11LxhxxsI67x02Fnnc1ClgMynCgDOvRXW6B93qRIRM
 ZUK8fbzIxFDQHnfzWRXcIIsN7r54Ow==
 =JHVN
 -----END PGP SIGNATURE-----

Merge tag 'liveupdate-v7.3-rc1-20260823' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux

Pull more liveupdate updates from Mike Rapoport:
 "Make boot time huge page allocation work nicely with kexec handover.

  Today allocation of gigantic pages in HugeTLB cannot work reliably
  with kexec handover (KHO):

   - HugeTLB allocates gigantic pages using memblock and autoscaling of
     KHO scratch accounts for these allocations. When gigantic pages
     occupy half of the memory of more, KHO fails to allocate its
     scratch memory.

   - After kexec handover, memblock allocations exclusively use KHO
     scratch that is not supposed to contain preserved memory. This
     essentially blocks preservation of HugeTLB with gigantic pages.

  Extend early memory pools available for KHO kernel with areas that are
  guaranteed not to contain preserved memory"

* tag 'liveupdate-v7.3-rc1-20260823' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux: (21 commits)
  kho: exclude hugetlb memory from scratch size calculation
  memblock: add memblock_reserved_hugetlb_size()
  memblock: make HugeTLB bootmem allocation work with KHO
  memblock: always include KHO headers
  kho: extend scratch
  mm/mm_init: don't rely on memblock to get KHO scratch migratetype
  kho: initialize preserved memory map radix tree earlier
  kho: initialize kho_scratch pointer earlier in boot
  kho: expose kho_scratch_overlap() to kexec_handover.h
  kho: add kho_radix_init_tree()
  kho: allow destroying KHO radix tree
  kho: allow early-boot usage of the KHO radix tree
  kho: add data argument to radix walk callback
  kho: add callback for table pages
  kho: add a struct for radix callbacks
  kho: move all memory retrieval logic to kho_mem_retrieve()
  kho: store incoming radix tree in kho_in
  kho: disallow wide keys in radix tree
  kho: make radix max key width more obvious
  kho: generalize radix tree APIs
  ...
 2026-08-23 09:17:38 -07:00
Linus Torvalds
e5f9260615 mm.git review status for master..mm-nonmm-stable 
Total patches:       95
 Reviews/patch:       0.63
 Reviewed rate:       56%
 
 Summary of patch series in this merge:
 
 - "ocfs2/dlm: bound peer-controlled lengths in the o2dlm" (Bryam Vargas):
 
   Validate and bound all input lengths and count fields in the o2dlm
   migration and recovery receive handlers to prevent memory corruption and
   kernel panics from malformed cluster messages
 
 - "ocfs2: validate xattr entry bounds" (Cen Zhang):
 
   Validate OCFS2 extended attribute entry name and value bounds during
   metadata reads to prevent out-of-range memory accesses during retrieval
   or listing operations.
 
 - "taskstats: fix cgroupstats invalid fd handling and add selftests"
   (Yiyang Chen):
 
   Return -EBADF when cgroupstats receives an invalid file descriptor to
   prevent caller hangs and misleading success ACKs.  Add a kselftest to
   validate valid cgroup v1 queries and verify proper error handling across
   different Netlink flag combinations.
 
 - "misc lib/raid/ improvements v2" (Christoph Hellwig):
 
   Improve benchmark-based algorithm selection for the XOR and RAID6
   libraries, add KUnit benchmark tests, and cleanup minor implementation
   details.
 
 - "ocfs2: cluster: o2hb_region_pin() fixes" (Joseph Qi):
 
   Fix sleeping-in-atomic, lock order inversion and error-path cleanup
   bugs in o2hb_region_pin() by releasing o2hb_live_lock across sleeping
   configfs_depend_item() calls and using unlocked variants from callback
   context.  Ensure failed pin attempts properly decrement user counts and
   unpin partially initialized heartbeat regions to prevent memory leaks
   and unprotected states.
 
 - "lib/ucs2_string.c: fix out-of-bounds read in ucs2_strnlen()" (Vincent
   Mailhol)
 
   Fix an off-by-one which could cause an out-of-bounds read.
 
 - "ocfs2: harden heartbeat teardown races" (Cen Zhang):
 
   Fix two OCFS2 heartbeat/o2net teardown races found by KASAN.
 
 - "taskstats: tidy up the cpumask command path" *Bradley Morgan)
 
   make two small cleanups in kernel/taskstats.c.
 
 - "ocfs2: validate active orphan slots during inode read" (ZhengYuan Huang):
 
   Validate active ordinary and append-DIO orphan slots read from OCFS2
   dinodes at the metadata boundary to prevent corrupted slot indices from
   causing out-of-bounds array accesses.
 
 - "ocfs2: bound-check both readdir re-validation scans" (Zhan Xusheng)
 
   Enforce strict boundary checks on directory entry record lengths and
   offset calculations during OCFS2 directory re-scans to prevent
   out-of-bounds memory reads and directory position corruption.
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCaoo38wAKCRDdBJ7gKXxA
 jnKuAP9tIUJoYIzxG7zr00qJj95gczgE0+GikN1wXfO9Cvh8QAEAqr5InWrANTBB
 l4qW3/o4hM9TlBdr84oT3RNnvBicuwA=
 =BY1d
 -----END PGP SIGNATURE-----

Merge tag 'mm-nonmm-stable-2026-08-22-16-57' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "ocfs2/dlm: bound peer-controlled lengths in the o2dlm" (Bryam
   Vargas)

   Validate and bound all input lengths and count fields in the o2dlm
   migration and recovery receive handlers to prevent memory corruption
   and kernel panics from malformed cluster messages

 - "ocfs2: validate xattr entry bounds" (Cen Zhang)

   Validate OCFS2 extended attribute entry name and value bounds during
   metadata reads to prevent out-of-range memory accesses during
   retrieval or listing operations.

 - "taskstats: fix cgroupstats invalid fd handling and add selftests"
   (Yiyang Chen)

   Return -EBADF when cgroupstats receives an invalid file descriptor to
   prevent caller hangs and misleading success ACKs. Add a kselftest to
   validate valid cgroup v1 queries and verify proper error handling
   across different Netlink flag combinations.

 - "misc lib/raid/ improvements v2" (Christoph Hellwig)

   Improve benchmark-based algorithm selection for the XOR and RAID6
   libraries, add KUnit benchmark tests, and cleanup minor
   implementation details.

 - "ocfs2: cluster: o2hb_region_pin() fixes" (Joseph Qi)

   Fix sleeping-in-atomic, lock order inversion and error-path cleanup
   bugs in o2hb_region_pin() by releasing o2hb_live_lock across sleeping
   configfs_depend_item() calls and using unlocked variants from
   callback context. Ensure failed pin attempts properly decrement user
   counts and unpin partially initialized heartbeat regions to prevent
   memory leaks and unprotected states.

 - "lib/ucs2_string.c: fix out-of-bounds read in ucs2_strnlen()"
   (Vincent Mailhol)

   Fix an off-by-one which could cause an out-of-bounds read.

 - "ocfs2: harden heartbeat teardown races" (Cen Zhang)

   Fix two OCFS2 heartbeat/o2net teardown races found by KASAN.

 - "taskstats: tidy up the cpumask command path" *Bradley Morgan)

   make two small cleanups in kernel/taskstats.c.

 - "ocfs2: validate active orphan slots during inode read" (ZhengYuan
   Huang)

   Validate active ordinary and append-DIO orphan slots read from OCFS2
   dinodes at the metadata boundary to prevent corrupted slot indices
   from causing out-of-bounds array accesses.

 - "ocfs2: bound-check both readdir re-validation scans" (Zhan Xusheng)

   Enforce strict boundary checks on directory entry record lengths and
   offset calculations during OCFS2 directory re-scans to prevent
   out-of-bounds memory reads and directory position corruption.

* tag 'mm-nonmm-stable-2026-08-22-16-57' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (95 commits)
  mailmap: fix bouncing address for Taniya Das
  ocfs2: bound-check dir entries in the inline-data re-validation scan
  ocfs2: bound-check dir entries in the readdir re-validation scan
  squashfs: avoid thundering-herd cache wakeups
  prctl: fix PR_SET_MM_AUXV losing the forced AT_NULL terminator
  mailmap: update email address for Linfeng Sun
  lib/interval_tree: fix allocation warning messages
  checkpatch: add NOKPROBE_SYMBOL to the whitelist of lines that can occur immediately after functions
  Squashfs: check block offset is not negative
  signal: factor out the kernel reserved si_code check
  ocfs2: fix readdir position truncation on 32-bit kernels
  ocfs2: fix cached cluster count after suballocator reclaim
  ocfs2: fix circular locking dependency in ocfs2_init_acl()
  ocfs2: validate DIO orphan slot during inode read
  ocfs2: validate orphan slot during inode read
  selftests/prctl: fix non-anonymous VMA mapping in set-anon-vma-name test
  MAINTAINERS: add IRC and patchwork for LTP
  include/linux/list.h: mark list_add and __list_add as __always_inline
  tools/mm: prevent page_owner_sort from truncating input
  hung_task: update DETECT_HUNG_TASK_BLOCKER Kconfig help
  ...
 2026-08-23 08:07:11 -07:00
Linus Torvalds
473f6c8f43 perf tools updates for v7.3 
perf c2c:
 
  - Add 'function view' in perf c2c report TUI (switched by pressing 'TAB'
    in the cacheline view) to organize samples around functions rather than
    cachelines in 3-level hierarchy:
 
      Level 1: Read-side function (sorted by estimated Cycles %)
      Level 2:   Contending writer functions (sorted by Store count)
      Level 3:     Shared cacheline addresses
 
    Users can navigate the entries and fold/unfold using 'e' key.  An example
    output would look like below:
 
     Shared Data Functions Table     (19 entries, sorted on Cycles %)
        Cycles    Store
             %    count  Function / Contending function / Cacheline
     ----------------------------------------------------------------------
     +  35.67%      876  + [k] cpupri_set
     +  24.31%      424  + [k] pull_rt_task
     -  16.53%      555  - [k] dequeue_pushable_task
                    145    - [k] pull_rt_task
                    145        0xff2d0082809da080
                    139    - [k] enqueue_pushable_task
                     70        0xff2d00a2071f9640
                     69        0xff2d0082809da000
 
 python module support:
 
  - Extend "perf" python module so that it can be fully functional.  The goal
    is to run scripts directly, not by 'perf script' command.  This would give
    better performance as well as more control to build standalone programs
    with UI.
 
  - Add LiveSession helper (perf_live.py) to enable live event collection
    directly from Python using perf.evlist and perf.parse_events.
 
 perf stat:
 
  - Add --hide-zero-events option to suppress zero-count events.
  - Reject conflicting --field-separator and --json-output options.
  - Fix duplicate event output with --for-each-cgroup.
 
 perf sched latency:
 
  - Add -H/--histogram and --hist-mode (log|linear) options to show scheduler
    wait latency histograms.
  - Add --time option to filter analysis by time span in 'perf sched latency'.
 
 ARM CoreSight:
 
  - Synthesize callchains for instruction samples from CoreSight trace
    using thread stack ('--itrace=g...').
  - Support call indentation ('perf script -F +callindent') to display call
    depth hierarchy on branch samples.
  - Decode ETE (Embedded Trace Extension) exception packets.
 
 Build system:
 
  - Add 'make install-build-deps' target to install required packages.
  - Parallelize JSON and metric pre-computation in jevents.py for faster builds.
 
 Vendor event/metric updates:
 
  - Add Intel Nova Lake events and update tables for existing models.
  - Update AMD Zen 5 and Zen 6 core events.
  - Update Arm64 Tegra410 metrics and PowerPC hcalls.
 
 Internal changes and fixes:
 
  - Harden trace-event and synthetic event parsing against corrupted data.
  - Fix unwinding of multi-threaded processes in libdw unwinder.
  - Fix memory leaks in various commands and python bindings.
  - Speed up 'perf test' shell tests.
 
 Signed-off-by: Namhyung Kim <namhyung@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQSo2x5BnqMqsoHtzsmMstVUGiXMgwUCaojCVQAKCRCMstVUGiXM
 gxZLAP9u7Bqhfcrc1KKS9RcxBaiYwsPOIgbtdrDDCSiLtdz0EwEAk1UCSXodUsaR
 45nbx01h+h7cUWk2HM735f4RXRfO/AE=
 =GLJH
 -----END PGP SIGNATURE-----

Merge tag 'perf-tools-for-v7.3-2026-08-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools updates from Namhyung Kim:
 "perf c2c:

   - Add 'function view' in perf c2c report TUI (switched by pressing
     'TAB' in the cacheline view) to organize samples around functions
     rather than cachelines in 3-level hierarchy:

	Level 1: Read-side function (sorted by estimated Cycles %)
	Level 2:   Contending writer functions (sorted by Store count)
	Level 3:     Shared cacheline addresses

     Users can navigate the entries and fold/unfold using 'e' key. An
     example output would look like below:

	Shared Data Functions Table     (19 entries, sorted on Cycles %)
	   Cycles    Store
	        %    count  Function / Contending function / Cacheline
	----------------------------------------------------------------------
	+  35.67%      876  + [k] cpupri_set
	+  24.31%      424  + [k] pull_rt_task
	-  16.53%      555  - [k] dequeue_pushable_task
	               145    - [k] pull_rt_task
	               145        0xff2d0082809da080
	               139    - [k] enqueue_pushable_task
	                70        0xff2d00a2071f9640
	                69        0xff2d0082809da000

  python module support:

   - Extend "perf" python module so that it can be fully functional. The
     goal is to run scripts directly, not by 'perf script' command. This
     would give better performance as well as more control to build
     standalone programs with UI.

   - Add LiveSession helper (perf_live.py) to enable live event
     collection directly from Python using perf.evlist and
     perf.parse_events.

  perf stat:

   - Add --hide-zero-events option to suppress zero-count events
   - Reject conflicting --field-separator and --json-output options
   - Fix duplicate event output with --for-each-cgroup

  perf sched latency:

   - Add -H/--histogram and --hist-mode (log|linear) options to show
     scheduler wait latency histograms
   - Add --time option to filter analysis by time span in 'perf sched
     latency'

  ARM CoreSight:

   - Synthesize callchains for instruction samples from CoreSight trace
     using thread stack ('--itrace=g...')
   - Support call indentation ('perf script -F +callindent') to display
     call depth hierarchy on branch samples
   - Decode ETE (Embedded Trace Extension) exception packets

  Build system:

   - Add 'make install-build-deps' target to install required packages
   - Parallelize JSON and metric pre-computation in jevents.py for
     faster builds

  Vendor event/metric updates:

   - Add Intel Nova Lake events and update tables for existing models
   - Update AMD Zen 5 and Zen 6 core events
   - Update Arm64 Tegra410 metrics and PowerPC hcalls

  Internal changes and fixes:

   - Harden trace-event and synthetic event parsing against corrupted
     data
   - Fix unwinding of multi-threaded processes in libdw unwinder
   - Fix memory leaks in various commands and python bindings
   - Speed up 'perf test' shell tests"

* tag 'perf-tools-for-v7.3-2026-08-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (232 commits)
  perf vendor events arm64: Fix Tegra410 Olympus event 0x0197
  perf vendor events arm64: fix swapped MetricGroup for Tegra410 L1 prefetcher metrics
  perf evlist: Warn when 'sleep' workload is used without system-wide (-a) option
  perf c2c: document function view in perf-c2c man page
  perf c2c: add function view browser UI and cacheline detail
  perf c2c: build and finalize the function view hierarchy
  perf c2c: add function view hierarchy entry creation
  perf c2c: add function view stats merge and memory management
  perf c2c: add HPP list parsing for function view columns
  perf c2c: add column rendering for function view
  perf c2c: add function view model skeleton
  perf c2c: extract shared data structures into util/c2c.h
  perf test sample-parsing: Validate PERF_FORMAT_GROUP values without LOST
  perf dso: Replace assert with runtime check in dso__read_symbol()
  perf dso: Guard against cache underflow on short reads in dso_cache__memcpy()
  perf dso: Use stored fd error instead of stale errno in file_read() and file_size()
  perf dso: Guard close() against invalid fd in dso__decompress_kmodule_path()
  perf dso: Guard against errno==0 when dso__get_filename() returns NULL
  perf build: install-build-deps: add RHEL family devel package mapping
  perf build: Remove leftover feature tests for removed cxx and clang support
  ...
 2026-08-22 08:47:50 -07:00
Linus Torvalds
7199989f3f Landlock update for v7.3-rc1 
-----BEGIN PGP SIGNATURE-----
 
 iIYEABYKAC4WIQSVyBthFV4iTW/VU1/l49DojIL20gUCaoa8/RAcbWljQGRpZ2lr
 b2QubmV0AAoJEOXj0OiMgvbSSjMBAIq+/dIjMVUddtyqRlWKMfBQqokU4Dl5JeHB
 Y4Jh61idAQCihXimNu+TOuX1zc80eBR+IzDYaAU8ZGcK079hmGO5Bw==
 =TKoa
 -----END PGP SIGNATURE-----

Merge tag 'landlock-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux

Pull Landlock update from Mickaël Salaün:
 "This improves observability with Landlock tracepoints support, which
  required some refactoring for dedicated domain types and common
  helpers shared with audit code.

  A LANDLOCK_RESTRICT_SELF_NO_NEW_PRIVS flag is also added to improve
  process-wide domain enforcement consistency.

  Whiteout files are now correctly handled and tested, and a few other
  fixes"

* tag 'landlock-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux: (34 commits)
  landlock: Document tracepoints
  selftests/landlock: Add landlock_enforce_domain trace tests
  selftests/landlock: Add scope and ptrace tracepoint tests
  selftests/landlock: Add network tracepoint tests
  selftests/landlock: Add filesystem tracepoint tests
  selftests/landlock: Add trace event test infrastructure and tests
  landlock: Add tracepoints for ptrace and scope denials
  landlock: Add landlock_deny_access_fs and landlock_deny_access_net
  landlock: Add tracepoints for rule checking
  landlock: Add landlock_enforce_domain tracepoint
  landlock: Add create_domain and free_domain tracepoints
  landlock: Add landlock_add_rule_fs and landlock_add_rule_net tracepoints
  landlock: Add create_ruleset and free_ruleset tracepoints
  landlock: Consolidate access-right and scope names in a shared header
  landlock: Decouple the per-denial logging decision from CONFIG_AUDIT
  landlock: Split denial logging from audit into common framework
  landlock: Split struct landlock_domain from struct landlock_ruleset
  landlock: Move domain query functions to domain.c
  landlock: Prepare ruleset and domain type split
  samples/landlock: Add LANDLOCK_RESTRICT_SELF_NO_NEW_PRIVS to sampler
  ...
 2026-08-21 12:28:35 -07:00
Linus Torvalds
2be02a7c99 power supply and reset changes for the 7.3 series 
* power-supply core
   - Add PbAc, NiZn, RAM, and ZnAr battery chemistry types
   - Create LED triggers based on properties instead of device type
   - Provide power_supply_get_system_batteries() for usage with USB-C
   - Add registration init callback for race-free device setup
  * power-supply drivers
   - new TI BQ25630 charger driver
   - new SG Micro sgm41542 charger driver
   - bq257xx: Add support for BQ25792
   - max8903: add DC and USB input current-limit controls
   - max17042_battery: Initialize MAX17055 from battery info
   - sbs-battery: map newly introduced battery chemistries
   - drop extra error messages for IRQ request failures
   - lot's of driver removal race condition fixes
   - misc. small cleanups and fixes
  * reset drivers
   - add MCF5441x RCM power-on reason driver
   - misc. small cleanups and fixes
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE72YNB0Y/i3JqeVQT2O7X88g7+poFAmqHhI8ACgkQ2O7X88g7
 +prz8A//RwS840YNf/HU54EoG9daMtipcZ6RJrSoY0UiS4oYxERuOoP3azaj/B+l
 6x7q8sp84E6Ejrrt1Hr6guKvRclVbgFJwagbqbzZ1l/EQvxgHPo2grHlSHSpqoPM
 NafNyFyrItuC9T02XkI1AnDcrXBIXZ4EXxIH2pe/da027lUGkAZO56oxmX5WDBRc
 OsUvCBBMOe2wlLnQErT7AfEFOic4H4Uz6j+CDwitHGqPcctpLR9JuBiB5QDFKaeY
 Nf3GDxRG1pahCCgs9ltOAHKx3UmS71xwfEWoig4h4r88OpV59Mm3fMhteTSt2nAl
 5c5tkSwBpnlTdMJdJkrlR4bmGMGjAdd0+MkqBivWGev1NJMNo/QGoh0a7pVUFGSt
 lPgy0vA51+ZBGmcEY6lh4uOlJ0Pn9Sd04Ao/En+0fd0r+jlq3x1JebwqTeFt9pNd
 5zXxl2UKpd6xaF6EZoV59AI/DCwNKxHpFfh1IMvBsfFAqe/ULrlr4v+AD+TCUMdr
 PLU/jdg9j8iIXo7s5U9Xymba5/cxFmy95u+fsVtjjFhHdSRMcKjwRS3mg0L5W+GN
 umy/2ewraTNsHCLZ7bS0/OL/rSv6nnL5DH/Jk02pkws2lpmVL5x+xeCK4UTJy6rA
 rMHa+Ex5/i+fW5n5XBgbDmRu/ihojcsVX5Xz/7/LqyuHvTlLWj4=
 =TxN7
 -----END PGP SIGNATURE-----

Merge tag 'for-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:
 "Power-supply core:
   - Add PbAc, NiZn, RAM, and ZnAr battery chemistry types
   - Create LED triggers based on properties instead of device type
   - Provide power_supply_get_system_batteries() for usage with USB-C
   - Add registration init callback for race-free device setup

  Power-supply drivers:
   - new TI BQ25630 charger driver
   - new SG Micro sgm41542 charger driver
   - bq257xx: Add support for BQ25792
   - max8903: add DC and USB input current-limit controls
   - max17042_battery: Initialize MAX17055 from battery info
   - sbs-battery: map newly introduced battery chemistries
   - drop extra error messages for IRQ request failures
   - lot's of driver removal race condition fixes
   - misc small cleanups and fixes

  Reset drivers:
   - add MCF5441x RCM power-on reason driver
   - misc small cleanups and fixes"

* tag 'for-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (115 commits)
  power: supply: bq27xxx: bq27z561: fix invalid AverageEnergy address
  power: supply: bq27xxx: bq28z610: fix invalid AverageEnergy address
  power: supply: bq27xxx: bq27520g4: fix REG_TTES address
  power: supply: max17040: synchronize work cancellation on suspend
  power: supply: lp8727: fix use-after-free in lp8727_release_irq()
  power: supply: bq256xx: drain usb_work before freeing the charger
  power: supply: qcom_battmgr: fix battery chemistry strncmp length
  power: supply: bd99954: Drop bad register fields
  power: supply: bd71828: Do not hide errors
  power: supply: bd71828: Drop duplicate power-supply property
  power: supply: bd71828: Fix current direction
  power: supply: bd71815: Fix temperature reading
  power: supply: add stubs for notifier registration helpers
  power: supply: ucs1002: fix use-after-free on remove
  power: supply: lp8788-charger: fix use-after-free on remove
  power: supply: ab8500_fg: fix use-after-free on remove
  power: supply: bq24257: fix use-after-free on remove
  power: supply: qcom_battmgr: fix use-after-free
  power: supply: max17040: drop incorrect I2C functionality check
  power: supply: charger-manager: register regulators before exposing sysfs
  ...
 2026-08-21 12:05:10 -07:00