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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull more MM updates from Andrew Morton:
- "mm: make VMA flag semantics explicit, eliminate VM_SPECIAL" (Lorenzo
Stoakes):
Replace VM_SPECIAL with helpers describing mapping ownership and
behavior. Enforce the mmap flag rules and convert affected drivers,
removing ambiguous tests shared by driver mappings and ordinary
memory.
- "support kselftest on nommu platform" (Hajime Tazaki):
Add opt-in mmap and mremap tests for NOMMU systems. Teach the runner
to avoid its fork-dependent timeout command and document the build
and runtime requirements.
- "mm/collapse: separate a collapse from its callers" (Kiryl
Shutsemau):
Separate huge-page collapse from caller policy. Replace khugepaged
identity checks with explicit permissions, and separate scanning from
collapse with the mmap_lock drop in one place.
- "mm: implement and use vma_has_anon_rmap(), silence KCSAN" (Lorenzo
Stoakes):
Provide a common helper for testing whether a VMA has anonymous
reverse mappings. Document the locking rules, annotate intentional
concurrent reads for KCSAN, and convert the core MM callers.
- "mm/sparse: remove SECTION_MARKED_PRESENT and further cleanups"
(David Hildenbrand):
Remove SECTION_MARKED_PRESENT in favor of the early-section flag.
Simplify sparse memory initialization, section metadata handling and
related PFN validity checks.
- "sh: remove NUMA and SPARSEMEM support" (Mike Rapoport):
Remove SuperH NUMA and SPARSEMEM support. The extra memory banks have
been unusable since the NO_BOOTMEM conversion, leaving only the code
and data overhead.
- "mm: Unify device DAX and HugeTLB vmemmap population paths" (Muchun
Song):
Unify the generic device DAX and HugeTLB vmemmap population paths and
shared tail-page handling. Remove the duplicate DAX machinery while
retaining the powerpc radix implementation.
- "kselftest: mm: fix some failure of split_huge_page_test" (Yeoreum
Yun):
Fix huge-page split tests racing with khugepaged recollapse. Use
pagemap and page flags instead of VMA-boundary assumptions which fail
when glibc has already enabled THP.
- "memcg: move memcgid refcount to objcg to unpin dying memcgs"
(Bingfang Guo):
Let dying memcgs be freed while swapped-out shmem still holds their
IDs. Move ID references to reparentable objcgs, with the necessary
swap accounting and RCU lifetime changes.
- "mm/truncate: fix data loss when truncating straddling large folios"
(Zhang Yi):
Preserve out-of-range data when truncating straddling large folios.
Fix a lookup race and split-failure handling, and handle minimum
folio orders for the forthcoming ext4 iomap buffered I/O path.
- "mm/damon: introduce damos quota goal target metric complement flag"
(SJ Park):
Let DAMOS quota goals use a metric's complement, so utilization can
also express free-memory goals without adding separate metrics. Add
the sysfs interface, documentation and tests.
- "arm64/mm: Standardize printing for pgtable entries" (Anshuman
Khandual):
Use the generic formatter for arm64 page-table entries, ready for
future wider entries. Move the safe-PTE-update check out of the
header to avoid an include cycle.
- "mm: kmsan: fix iounmap metadata teardown" (Dima Koziuk):
Fix KMSAN metadata leaks on iounmap and failed ioremap allocations.
Free backing pages before removing their mappings, and share the
teardown with partial-allocation cleanup.
- "mm/damon/core: preserve quota state when constructing schemes" (Karl
Mehltretter):
Preserve running DAMOS quota state while validating parameter
updates. Even rejected updates could reset accounting and exceed the
quota window; add tests for both accepted and rejected updates.
- "mm/vmalloc: fix vmalloc_dump_obj VA lookup" (Ye Liu):
Fix vmalloc_dump_obj() lookups for last-page addresses and
allocations spanning vmap zones. These allocations were being missed
in diagnostic output.
- "mm: various (urgent?) fixes" (David Hildenbrand):
Fix mmap charge leaks and hugetlb use-after-free, wrong-address
unmapping, stuck locks and endless faults. Also preserve reservations
on failed mremap and handle stale userfaultfd bits.
- "maple_tree: fix maple_range_64 crashes in RCU mode" (Dimitris
Charisis):
Fix pointer and metadata confusion during RCU destruction of
maple_range_64 nodes, avoiding double frees and invalid accesses. Add
a regression test; no in-tree user currently uses this combination.
- "mm: fix hugetlb NR_HUGETLB accounting on folio migration" (Hongfu
Li):
Fix hugetlb migration and preallocation accounting so /proc/vmstat
retains the correct count and memory.numa_stat follows the folio to
its new node.
- "mm/damon: fix a minor bug, clean code, and add a test" (SJ Park):
Fix 32-bit DAMON age overflow which made old regions look young.
Share hugetlb folio acquisition code and add a regression test for
the previously fixed last-region skipping bug.
- "mm/damon/core: cleanup code, reduce stack usage, and add kunit" (SJ
Park):
Reduce kdamond stack usage and remove unused enums. Add deterministic
PSI quota-goal tests which do not depend on the machine's current
memory pressure.
- "mm/damon: fix the temporal goal tuner's size quota conversion"
(Donggeun Yoo):
Bound the temporal tuner's quota conversion to prevent overflow and
zero effective quotas, which could stop schemes making progress. Add
boundary tests.
- "Don't use GFP_DMA when calling dma_alloc_coherent" (Baoquan He):
Remove redundant GFP_DMA flags from coherent DMA allocation calls.
The DMA API already selects the zone from device limits and ignores
the caller's flag.
- "kselftest: mm: fix intermittent failure khugepaged test" (Yeoreum
Yun):
Propagate child-process failures in the khugepaged tests and prevent
background collapse from racing their checks. This removes false
passes and intermittent failures.
- "MAINTAINERS: cover all hugetlb headers under HUGETLB SUBSYSTEM"
(Enze Li):
Cover all hugetlb headers in MAINTAINERS so get_maintainer.pl finds
the right maintainers. Also label the closing hugetlb_cgroup.h
include guard.
Summary of the 65 singletons in this merge:
The singletons include a few worthwhile performance fixes. Avoiding
unnecessary reverse-map tree updates gave a reported 15.9% improvement
in UnixBench's execl test on a 192-core x86 system. A reclaim retry
fix stops defrag_mode from spinning under memory.low protection; a
reported file-creation stress test ran 5.7 times faster, with far less
memory pressure. Narrower hugetlb invalidations also spare KVM guests
needless refaults: the reported Redis-in-VM P99 QPS penalty while
punching holes fell from 7.09% to 1.45%.
Several fixes prevent lost data or corrupted memory. Lazyfree
huge-page races with mremap()/munmap() could lose data or access freed
memory, and MADV_COLD could lose a concurrent write's dirty bit.
Another fix prevents stale migration entries from outliving large
folios. On filesystems with blocks smaller than a page, extending a
file by 4 GiB or more could expose bytes written past the old EOF
through mmap instead of zeroes. That is fixed, along with
use-after-free races in PAGEMAP_SCAN during process exit and in
memory-cgroup accounting on PREEMPT_RT kernels.
Other fixes stop UFFDIO_MOVE spinning forever on pinned large folios,
which could wedge other memory operations, and stop mremap() leaking
commit charges until allocations fail under strict overcommit. A
further fix keeps userfaultfd tracking intact on neighboring mappings.
NUMA binding no longer prevents long-term pins when the chosen node
has only movable memory, fixing QEMU/VFIO startup and io_uring buffer
registration failures. MGLRU also gets a fix for early-boot crashes
with memory cgroups disabled at boot, notably in small crash kernels.
* tag 'mm-stable-2026-10-25-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (213 commits)
mm: multi-gen LRU: fix NULL lruvec->pgdat deref with memcg disabled on cmdline
mm/page_counter: use WRITE_ONCE() for emin/elow when parent is the root
mm/memcontrol: publish null pointer before dropping css reference
test_maple_tree: test maple_range_64 node in RCU mode
maple_tree: fix maple_range_64 crashes in RCU mode
mm/vma: avoid broken uffd merge on mremap
tools/testing/shared: catch a failed posix_memalign()
mm/damon/core: remove unreachable damos charge_{target,addr}_from
mm/shrinker: allocate shrinker_info_unit from a dedicated kmem_cache
riscv: mm: exclude invalid THP PMDs from page table check
mm/damon/core: filter out damos address filter-split failed region
fs/proc/task_mmu: pin mm_users in do_pagemap_scan()
mm/mempolicy: apply bind policies against the scoped allocation zone
mm/vmscan: reclaim every zone in per-node proactive reclaim
mm/mremap: correctly uncharge accountable VMAs in error path
mm/mremap: populate calculated fields in vrm state correctly
MAINTAINERS: add an entry for MEMORY MANAGEMENT - MEMORY MAP
mm: bdi: reset min_ratio after the sysfs attributes are gone
mm/page_vma_mapped: continue past nonmatching huge PMDs
selftests/mm: skip hugetlb cgroup v2 tests without the needed controllers
...
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- v4l2 core:
- improve subdev and pixformat kAPI;
- fix P010 format info and add Y12 format info;
- add fwnode_graph_for_each_endpoint_scoped();
- New sensor drivers:
- Sony IMX576
- OmniVision OS02G10, OV05C10 and OG0VA1B
- Samsung S5KJN5
- Himax HM1246
- Maxim GMSL2/3: add support for MAX9296A, MAX96717, and MAX96724
- Intel IPU6: add support for IPU7, IPU7.5 and IPU8
- NXP: add support for i.MX95 CSI pixel formatter driver
- ITE: add driver for IT6625/IT6626 HDMI bridge
- Qualcomm: add CSI2 3ph DPHY driver
- Rockchip: add rk3576 MIPI capture vicap driver
- STM32 DCMIPP: Add STM32MP25 subdevices
- Lots of driver fixes and cleanups
* tag 'media/v7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (596 commits)
media: i2c: imx576: Fix line length register
media: ov05c10: Remove duplicated writes to analogue gain register
media: ov05c10: Power management fixes
media: ov05c10: Set reset GPIO high when acquiring it
media: ov05c10: Small cleanups
media: maxim-serdes: Disable test pattern generator for now
media: mc: Keep INTERNAL pad flags just for the kernel, for now
media: i2c: imx576: select VIDEO_CCS_PLL to repair build error
media: Documentation: mc: Fix Stream reference
media: i2c: add imx576 image sensor driver
dt-bindings: media: i2c: Add imx576 sensor
media: i2c: maxim-serdes: add MAX9296A driver
media: i2c: remove MAX96714 driver
media: i2c: maxim-serdes: add MAX96724 driver
staging: media: remove MAX96712 driver
arm64: defconfig: disable deprecated MAX96712 driver
media: i2c: maxim-serdes: add MAX96717 driver
media: i2c: remove MAX96717 driver
media: i2c: add Maxim GMSL2/3 deserializer framework
media: i2c: add Maxim GMSL2/3 serializer framework
...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / Thunderbolt update from Greg KH:
"Here is the big set of USB and Thunderbolt changes for 7.4-rc1.
Included in here are:
- thunderbolt driver updates and fixes
- lots of dt schema conversions
- usb gadget driver fixes (and a new maintainer!)
- usb core fixups with some interactions with the driver core
- usb serial updates and fixes for scan-found "issues"
- xhci driver updates
- typec driver updates
- dwc3 driver updates
- lots of usb gadget driver fixes for syzbot found "problems"
- lots of other small USB driver fixes for randomly reported problems.
All of these have been in linux-next with no reported issues"
* tag 'usb-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (158 commits)
usb: gadget: dummy_hcd: prevent unbind via sysfs
usb: gadget: dummy_hcd: add tick_us module parameter for timer-rate tuning
usb: gadget: dummy_hcd: set no_sg_constraint only on the SuperSpeed bus
usb: gadget: dummy_hcd: fix SuperSpeed ep0 maxpacket
usb: gadget: fix refcount underflow in gadgetfs_bind() error path
USB: core: document purpose of interface parent reference
MAINTAINERS: add Neill Kapron as USB Gadget maintainer
USB: Documentation: Update description of completion callback context
USB: serial: mxuport: support RS485 mode configuration
USB: serial: mxuport: handle SEND_NEXT transmit flow control
USB: serial: add generic write control callbacks
USB: serial: mxuport: add MUX50U-based device support
USB: serial: mxuport: clean up firmware version handling
USB: serial: mxuport: clean up product ID definitions and device table
USB: serial: sierra: fix urb leak on write completion
usb: typec: ucsi_ccg: Add retry mechanism in ccg_read
usb: host: xhci-tegra: Add Tegra264 XHCI support
usb: host: xhci-tegra: Skip MBOX MSG_ENABLED on Tegra264
dt-bindings: usb: Add Tegra264 XUSB host support
usb: xhci-pci: Add TUSB73x0 definitions
...
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Verification that the kernel does not have writable + executable mappings
is about detecting security risks rather than a pure debug feature.
Major distribution configurations enable it in their kernels as well as
defconfigs of most architectures that have ARCH_HAS_DEBUG_WX.
Rename relevant generic configuration options to use CHECK_WX and move
their definitions from mm/Kconfig.debug to mm/Kconfig.
Rename *debug_checkwx() funcitons and macros to *pgtable_checkwx().
For arm that does not widely enable it, only rename its variants of the
config options.
Enabling CHECK_WX adds a few kilobytes to the kernel binary and while the
added size can be slightly reduced with churny updates of architecture
implementations of ptdump, the core functionality takes most of the added
size. It cannot be moved to .init.text because the verification has to
happen after init sections are freed.
With this, make generic CHECK_WX default to STRICT_KERNEL_RWX while
still leaving users targeting small kernels the possibility to opt-out.
Link: https://lore.kernel.org/20260926-direct-map-verify-wx-v2-1-efcd64a6b74a@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <chleroy@kernel.org>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Gleixner <tglx@kernel.org>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Will Deacon <will@kernel.org>
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Pull drm updates from Dave Airlie:
"Highlights:
- core: a lot of atomic refactoring in progress, panic got split into
a core/helpers model
- amdgpu: enables HDMI 2.1 FRL and other good things finally, UAlink
over Ethernet support
- xe: has a bunch of CRI support, ras error for bad vram, memory
offlining support.
- msm: enables a bunch more GPUs.
Otherwise it's a the usual mountain of stuff all over the place.
Details:
rust:
- I/O tree shared with driver-core
- DMA tree shared with driver-core
- allow aux registration data closures to return covariant sub-fields
- Implement Send and Sync for MapleTree
- add pci resource flags and IORESOURCE_MEM_64
drm/rust:
- add dma_fence abstraction
- init DRM registrations and their data in place
- drop unused flags argument to registration
vgaarb:
- rework API to pass a private ptr instead of pci device
sound:
- adapt to omapdrm changes
gem:
- add callback for handle count going to 0
gpusvm:
- share one HMM fault and keep single mappings inline
pagemap:
- Prevent CPU stalls during unbounded pagemap teardown
dma-fence:
- fix docs
vga_switcheroo:
- disconnect from fbcon
- update fbcon from within fbdev emulation
atomic:
- move DRM from state reset callbacks to atomic_create_state
- remove drm_simple_encoder_init
panic:
- split into core and helpers
buddy:
- improve dirty tracking
clients:
- improve vmap handling
- fbdev: Move helpers from drm_kms_helper.ko to drm_client_lib.ko
display:
- export HDMI SCDC status data via debugfs
- rework SCDC for better HDMI 2.0 support
- dp/mst: improve DPCD compliance
edid:
- parse AMD VSDB
- parse ALLM/VRR capabilities
- support detecting panel size
log:
- add drm_warn_ratelimited
sched:
- cleanup interface
- add missing locking
- fix run-queue cleanup
- fix locking
sysfb:
- remove obsolete quirk for Lenovo D330
- fix panel orientation for non-native display modes
- drop drm_class_device_register
colorop:
- provide DRM_COLOR_OP_FIXED_MATRIX
bridge:
- analogix: Support eDP lane mapping
- ti-sn65dsi83: Support LVDS Channel B on SN65DSI84
- Select DRM_PANEL_BRIDGE for various drivers that require it
- add chrontel ch7218a support
panel:
- panel-edp: Support MNE007QS3-F, TM140VDXP15, and KD116N36-30NB-A001
- samsung-s6d16d0: Use mipi_dsi_*_multi() functions
- support Ilitek ILI7836A OLED plus DT bindings
- support Novatek NT36532 plus DT bindings
- convert several drivers to managed cleanup
- fix Kconfig selections
- edp:
- Add support for BOE NV140FHM-T0A
- Support CSOT MNE007QB1-1
- NV140WU2-M70
- ebbg-ft8719: Fix MODULE_LICENSE() string; Improve initialization
- samsung: Share test-key helpers
- ilitek-ili9882t: Support Ilitek IL79600A plus DT bindings
- simple: Support Truly TFT320240-229-E plus DT bindings; Support BOE
DV215FHM-R01 plus DT bindings
- Refactor struct drm_panel to contain struct drm_bridge plus fallout
in various panel drivers
- Add support for BOE Novatek NT51021, Retroid Pocket 6, Raydium
RM69220 DDIC panels, Sharp LQ138P1JX61 eDP, BOE NV140FHD-N43, AUO
B140HAN04.0, AUO 0x0db3, panels.
amdgpu:
- use AMD VSDB for freesync
- implement YUV-to-RGB with fixed-matrix colorop
- enable FRL for HDMI
- HDMI 2.1 freesync support
- HDMI 2.1 ALLM support
- HDMI 2.1 VRR support
- UALoE (UALink over Ethernet) support
- add syncobj_points to userq signal ioctl
- drop unused kunit tests
- NBIO/GC/MMHUB/SMU updates/fixes
- GPU spatial partitioning updates
- display kunit fixes
- userq fixes
- RGB quantization fixes
- DC RMCM refactor
- DP MST fixes
- USB4 fixes
- add new trace events
- Rework display instance handling
- stack frame size fixes for various compilers/configs
- VCN 4/5 reset fixes
- freesync updates
- cursor refactor
- Fix direct scanout alpha on some DRM_FORMATs
- Expand Mac reserved memory workaround
- Make runtime pm more fine grained
amdkfd:
- updates and fixes
- GC 10 CU occupancy support
radeon:
- eDP fix for DCE3.2 iMacs
xe:
- add drm_ras netlink error event support
- add memory page offlining support
- introduce error threshold to drm_ras
- fix stale GTT mappings on unmap
- reject page faults for non-page fault mode scratch VM
- enable CRI package and VRAM temperatures
- introduce cold reset recovery
- handle CRI+ power interval encoding
- VF migration for multi-queue
- handle exec queue teardown after hot unplug
- alerts and controller enabling modifications
- use IBCv3 on PTL
- VRAM health check
- report GT TDR and VM rebind faults using SIGID
- add multi_queue_active_lrca debugfs
- shrinker: Runtime PM reference for non-system memory
- guc: Add simple KLV decoder helpers
- debugfs: Expose per-engine idle status
- Keep walking on SVM eviction failure
- Nuke PTs only after unlinking contested VMAs
- limit sg segment size to PAGE_SIZE on Xen PV
- keep VF LMEM bar size low if no VFs
- CPU binds and ULLS on migration queue
- New PTL PCI ID
- Enable PXP for NVL-S
- Do not dma_fence_put zero fences in err_out path
- Refresh TTM LRU on SVM prefetch
- export device UID in sysfs
i915:
- rename GEN6_PCODE_DATA to match spec
- fix incorrect RCU teardown order
- fix potential UAF in command parsing
- avoid WARN splat during RPS boosting race
- use simpler min functions
- Fixes to make i915 work well with PREEMPT_RT
i915/display:
- Enable CMRR (Content Match Refresh Rate) in fixed-RR VRR path
- Switch DG2 MPLL to DPLL framework
- DP-HDMI PCON DSC fixes
- limit invalid joiner combinations
- CDCLK related fixes and refactor around PCODE integration
- Gate UHBR SST SDP splitting on sink caps
- add HDMI TMDS audio bandwidth check
- vswing/preemph override
- enable AS SDP Skip frames
- Handle negative configuration index on DP link caps for robustness
- Preparation for enabling SDR plane color pipeline
- An eDP quirk for HP Pavilion Plus
- Introduce PME (Power Management Event) support on display hotplug
- Handle VSC SDP revision 7 in unpack
msm:
- CI:
- Dropped sc7180 trogdor lazor from the CI
- Core:
- Fixed msm_ioremap for resources without a name
- Changed msm.separate_gpu_kms to default to auto selection
- GPU:
- Enable CLX (Current Limit eXtension) for gen8 to avoid exceeding
limits on CX/GX rails
- New GPUs: a830 (Pakala), a845 (Maili), a850 (Hawi), x2-85
(Mahua)
- Fix VBIF halt mask on a306, which was preventing runpm suspend
- Enable THP support for GEM buffers
- Add modparam to disable waiting on fences in shrinker
- Drop use of drm_prime_sg_to_page_array()
- a5xx: don't read the GPMU registers on GPUs without a GPMU
- a2xx/a3xx/a5xx: hangcheck progress detection
- a6xx: gmuwrapper runpm fix
- Calculate reported GMEM size based on active slices
- Split a6xx/a7xx/a8xx catalog
- DP:
- Picked up some preparation patches for the MST support
- Fixed reported status of the link training
- DPU:
- Fixed CRTC bandwidth computation
- Fixed DSC programming
- Fixed encoder disablement path
- DSI:
- Fixed VM leak in error path
- Indention fix
- MDP5:
- Added MSM8952 configuration
- Dropped incorrect cursor pipe on MSM8976/56
- HDMI:
- Small fixes
nouveau:
- improve runtime PM on R570 GSP firmware
- various fixes throughout the driver
- dispnv50: support 2.147 GHz pixel clock in GB20x
nova:
- add initial uapi concept
- add initial PRAMIN access support
- add GpuMm centralized memory manager
- add GPU VM and BAR1 support
- add GPU interrupts and GSP events support
- GSP messaging fixes
tyr:
- use bitfield!
- zero unsupported and newly added GPU info fields
- limit doorbell array to 17 entries
exynos:
- FIMD fixes
- Fix clock leak on resume error path
- Fix Sparse warnings by adding missing __iomem annotation
- VIDI cleanup
- Replace kmalloc() and copy_from_user() with memdup_user()
amdxdna:
- fix BO handling
- Support AIE2 rev 9
- Fix UAF access in scheduler fences
- Update workqueue interface
- expose busy time via fdinfo
ast:
- support 256-byte EDID
hyperv_drm:
- remove support for pre win10 hosts
komeda:
- fix GLB_CORE_ID usage
omap:
- report HDMI hotplug events to ASoC HDMI codec
panthor:
- provide gpu_cache_flush tracepoint
- improve dma_fence signalling latency
- improve locking
- export scheduling information via debugfs
- Validate user-space input against firmware limits
qaic:
- reject BOs that exceed maximum page count
- add missing include statements
verisilicon:
- fix hardware cursor offsets
vkms:
- implement YUV-to-RGB with fixed-matrix colorop
gma500:
- avoid unsupported ARGB formats in primary plane
hibmc:
- handle vblank interrupts correctly
ivpu:
- add DRM_IVPU_CAP_CMDQ_SET_PRIORITY
- support command-queue priority ioctl
- Simplify NULL-pointer handling in cleanup code
arcpgu:
- replace simple-display pipeline with regular atomic helpers
aspeed:
- replace simple-display pipeline with regular atomic helpers
gm12u320:
- replace simple-display pipeline with regular atomic helpers
imagination:
- various improvement to firmware interaction
- add job to pvr_job_submit_fw trace event
mali-dp:
- fix runtime PM leak
mcde:
- replace simple-display pipeline with regular atomic helpers
p111:
- replace simple-display pipeline with regular atomic helpers
- drop unsupported alpha formats from primary plane
rcar-du:
- support Renesas R-Car V4H DSC
- dsi: Support larger transfers with AXI memory
- Support RZ/G3L SoC
repaper:
- replace simple-display pipeline with regular atomic helpers
rockchip:
- dsi: improve PHY timings
ssd130x:
- support Solomon SSD1351 OLED plus DT bindings
- ssd133x: upgrade color format to RGB565
- ssd132x: Set correct hardware window when clearing screen
tve200:
- replace simple-display pipeline with regular atomic helpers
xen:
- replace simple-display pipeline with regular atomic helpers
v3d:
- improve job handling under perfmon
vc4:
- reliably reset V3D
- drop brcm,vc4-v3d compatible
virtio:
- fix damage handling
- Support ARGB8888 for virtio primary planes.
host1x:
- Support partitioning
imx:
- Replace simple-display with regular atomic helpers
mxsfb:
- Support bus formats plus DT bindings
tegra:
- improve syncobj handling on submit
panfrost:
- add Mali-G68 support
- improve GPU reset handling
rockchip:
- add HDMI 2.0 support to dw-hdmi-qp
- improve HPD handling"
* tag 'drm-next-2026-10-21' of https://gitlab.freedesktop.org/drm/kernel: (2324 commits)
drm/adp: Switch to drm_atomic_helper_connector_create_state
drm/malidp: Convert to atomic_create_state
drm/vc4: Switch to drm_atomic_helper_connector_create_state
drm/sysfb: Switch to drm_atomic_helper_connector_create_state
drm/solomon: ssd130x: Switch to drm_atomic_helper_connector_create_state
drm/imx: ipuv3: Switch to drm_atomic_helper_connector_create_state
drm/hyperv: Switch to drm_atomic_helper_connector_create_state
drm/bridge: megachips: Switch to drm_atomic_helper_connector_create_state
drm/bridge: lontium-lt8912b: Switch to drm_atomic_helper_connector_create_state
drm/arm: komeda: Switch to drm_atomic_helper_connector_create_state
drm/appletbdrm: Fix incorrect error message on encoder attach failure
drm/sun4i: hdmi: Convert to drmm_connector_hdmi_init()
drm/rockchip: rk3066_hdmi: Advertise HDMI 1.4 capabilities
drm/bridge: lontium-lt9611: Advertise HDMI 1.4 capabilities
drm/bridge: ite-it66121: Advertise HDMI 1.2 capabilities
drm/bridge: ite-it6263: Advertise HDMI 1.3 capabilities
drm/bridge: ite-it6263: Drop redundant .mode_valid hook
drm/bridge: inno-hdmi: Advertise HDMI 1.2 capabilities
drm/bridge: adv7511: Advertise HDMI 1.2 capabilities
drm/sched: Document entity->stopped is protected by entity->lock
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
Pull dma-mapping updates from Marek Szyprowski:
- several SWIOTLB initialization cleanups (Aneesh Kumar K.V, Francesco
Valla)
- exact page allocation for DMA pages (Qingfang Deng)
- tools/dma build fixes (Sasha Levin)
- minor fixes for various corner cases (Marek Szyprowski, Leon
Romanovsky) and code cleanup (John Garry)
* tag 'dma-mapping-7.4-2026-10-21' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
dma-debug: Skip cacheline tracking for MMIO mappings
tools/dma: fix building from the top level with O=
tools/dma: fix building with O=
dma: swiotlb: Track whether the pool size was explicitly set
dma: swiotlb: Consolidate slab rounding
dma: swiotlb: Rename swiotlb_size_or_default()
dma: swiotlb: use KiB in restricted pool allocation log
dma-direct: Restore arch_dma_alloc() for the DMA_ATTR_NO_KERNEL_MAPPING case
MAINTAINERS: Add files to the DMA MAPPING HELPERS entry
dma-mapping: use exact allocation for DMA pages
dma-mapping: rename dma_opt_mapping_size()
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "selftests/mm: improve khugepaged coverage" (Kiryl Shutsemau):
Give khugepaged a proper workout. Extend the tests to all supported
mTHP orders, check exactly which windows collapsed, and make scan
completion deterministic. Race collapse against faults, pinning, fork
and remap; verify that the contents survive.
Add coverage for whole-page-table zaps and memory pressure too.
- "selftests/mm: separate GUP microbenchmarking from functional testing"
(Sarthak Sharma):
Untangle GUP benchmarking from correctness testing. Move the
benchmark into tools/mm, add a standalone harness-based GUP selftest,
and move shared helpers into tools/lib/mm. Give each tool one job
instead of mixing timing measurements with correctness checks.
Cover the mapping, pinning and batch-size combinations explicitly.
- "mm: Switch device DAX to section-based vmemmap optimization" (Muchun
Song):
Apply section-based vmemmap optimization to device DAX. Rework the
backing metadata layout to save memory while preserving the handling
of device memory hotplug and its different alignment and lifetime
requirements.
- "mm: Introduce section-based vmemmap optimization for HugeTLB"
(Muchun Song):
Cut the memory consumed by HugeTLB's struct page array with
section-based vmemmap optimization. Arrange the metadata so large
huge pages need fewer backing pages, while keeping initialization,
teardown and the various hugepage configurations straight.
- "mm/huge_memory: clean up and decouple the anon and file split
helpers" (Kairui Song):
Separate anonymous and file-backed folio splitting, which have rather
different locking and bookkeeping requirements. Move the work into
separate helpers, drop dead checks and tidy swap-cache handling. Fix
error paths, including one that could leave a folio frozen.
Keep the swap cache cases separate from file-cache splitting.
- "mm: Unconditional per-VMA locks and cleanups" (Dave Hansen):
Make per-VMA locking unconditional and clean up the old conditional
code around it. This removes configuration-dependent plumbing and
lets callers depend on one locking model rather than carrying both
cases along.
- "memcg: remove the v1 soft limit" (Shakeel Butt):
Remove the old cgroup v1 memory soft-limit machinery. This has long
since been superseded by the newer memory-control interfaces; hauling
around a separate reclaim scheme for it no longer buys us much.
- "read proc/pid/smaps_rollup under per-vma lock" (Suren Baghdasaryan):
Read /proc/PID/smaps_rollup using per-VMA locks where possible,
rather than holding mmap_lock across the entire walk. Retain the
contention fallback and add tearing tests. This considerably reduces
latency when another thread is busy changing its mappings.
- "mm/damon: introduce data access-as-a-data attribute" (SJ Park):
Teach DAMON to expose memory access observations as data attributes,
making them available to the probe and filtering machinery. Extend
the interfaces, documentation and tests so the new information can be
used rather than merely collected.
- "Remove PG_private by using page/folio->private checks instead" (Zi
Yan):
Get rid of PG_private and use the folio's private pointer to say
whether private data is attached. Convert the filesystem users,
including erofs, f2fs and md, and clean up the old accessors and
flags. There are a few special cases, notably swapcache and hugetlb,
which need explicit care.
- "mm: make userland page table freeing RCU-safe" (Lorenzo Stoakes):
Make freeing userspace page tables safe against RCU readers. Sort out
the page-table lifetime and locking rules so walkers cannot stumble
over freed tables while mappings are being torn down.
- "make unused huge shrinker memcg aware" (Qi Zheng):
Make shmem's unused-huge-folio shrinker aware of memory cgroups, so
reclaim can find those folios under the right memcg. Wire up the
per-memcg tracking and its lifetime rules, and give the shrinklist
its own lockdep class to avoid spurious dependency reports.
- "mm: Drop pxd_ERROR()" (Anshuman Khandual):
Remove the old pxd_ERROR() page-table checks and their
architecture-specific baggage. Simplify the common page-table
interfaces and callers now that these checks no longer serve a
useful purpose.
- "memcg: group struct fields by access pattern" (Shakeel Butt):
Rearrange memcg's hot and cold fields according to how they're
actually accessed. Keep frequently updated counters and their
neighboring state from fighting over cachelines and reduce needless
cacheline traffic.
- "mm/damon/core: fix the size charged for a filter-trimmed region"
(Donggeun Yoo):
Fix DAMOS quota accounting when a filter trims a monitoring region.
Charge only the part left after filtering, not the original region,
and add KUnit coverage. Previously the excluded memory could eat into
the quota and make schemes run more slowly than requested.
- "mm/damon: add kunit and selftests for probes and probe weights" (SJ
Park):
Add more tests for DAMON probes and their weights, including
validation and the results reported to userspace. This is mostly
about catching regressions in the newer probe infrastructure before
they become harder to diagnose.
- "mm: memcontrol: constify the read side of the read side of the memcg
API" (Tal Zussman):
Mark the read-only parts of the memcg interface const, from folio and
lruvec accessors to counters and swap helpers. Most of this is
mechanical, but it makes the contracts clearer and lets the compiler
catch accidental writes.
- "mm/damon/vaddr: support {prep,apply}_probes" (SJ Park):
Support the new prepare/apply probe operations in DAMON's
virtual-address backend. This brings vaddr monitoring into line with
the probe infrastructure and makes the added probe types useful there
too.
- "mm/mglru: clean up folio counters and flag usage" (Kairui Song):
Simplify MGLRU's folio counters and flag handling. Remove redundant
accounting paths and make the state transitions easier to follow
without changing the intended reclaim policy.
- "arch, mm/execmem: resolve confusion about set_direct_map_valid_noflush()"
(Mike Rapoport (Microsoft)):
Clarify and straighten out the set_direct_map_valid_noflush()
interface across architectures and execmem. Make the requested
mapping changes and the callers' expectations agree, rather than
relying on subtly different architecture behavior.
- "mm: zswap: free cold writeback folios promptly" (Alexandre Ghiti):
Free zswap writeback folios as soon as their disk write completes.
They are cold temporary buffers, so putting them on the LRU only
makes reclaim rediscover them later. Extend swap-cache dropbehind and
let zswap keep these folios off the LRU altogether.
- "mm: gup: cleanup gup_fast call chain" (Aristeu Rozanski):
Clean up the GUP-fast call chain and simplify how the fast-path
helpers pass their arguments and results around. Keep the page-pin
behavior the same while making the call sequence easier to maintain.
- "mm: optimize zone-device memmap initialization" (Li Zhe):
Speed up initialization of zone-device struct pages. Avoid redundant
work when setting up large device-memory ranges, where touching every
descriptor can get expensive.
- "mm/zswap: shrink zswap_entry via a pool id" (Jianyue Wu):
Reduce the size of zswap_entry by storing a compact pool identifier
instead of a full pointer. Keep the pool lookup and lifetime handling
correct while saving per-entry metadata.
- "mm/damon: support access monitoring of hugetlb-backed memory"
(Krishna Iyer):
Let DAMON monitor hugetlb-backed memory too. Extend the relevant
access checks and add coverage so those mappings no longer fall
through a hole in the monitoring machinery.
- "mm/execmem: fixes and cleanups for the ROX cache" (Mike Rapoport):
Tidy execmem's read-only-executable cache and fix its handling of the
awkward allocation and release cases. The aim is to make the cache's
ownership and permission transitions more predictable.
- "zsmallc: remove old object read API" (Sergey Senozhatsky):
Drop zsmalloc's old object-read API and move its remaining users to
the supported access mechanism. This removes a duplicate interface
which we no longer need.
- "mm/mempolicy: stop copying state in the interleave paths" (Gregory
Price):
Stop copying mempolicy state in the interleave paths when a reference
to the existing policy will do. This avoids extra work and makes the
ownership rules less obscure.
- "mm/mglru: speed up inc_min_seq() and fix cold/hot inversions" (Barry
Song):
Make MGLRU's generation advancement cheaper and fix cases where cold
and hot folios end up in the wrong order. Adjust the counter and list
handling so reclaim doesn't keep passing over the better eviction
candidates.
- "mm: Fix MF_DELAYED handling on memory failure" (Lisa Wang):
Treat MF_DELAYED as a partially completed memory-failure operation,
not an outright failure. Propagate that result correctly through
shmem and the generic handler, fix the extra-reference accounting,
and add tests for the resulting SIGBUS behavior.
- "tools/mm/page_owner_sort: fix --sort, add module filter, improve
usage" (Ye Liu):
Fix page_owner_sort's --sort handling, add module-based filtering and
make the usage output more helpful. This makes the tool less
frustrating when tracking down who is holding on to pages.
- "mm/damon: move damos filter range arguments validation to core" (SJ
Park):
Move DAMOS filter range validation into the core, where all callers
can share it. Also close the sysfs read-twice races which could pass
inconsistent ranges, and add tests for invalid input.
- "mm/damon: misc cleanups" (Zenghui Yu):
Clean up a collection of small DAMON rough edges in the core,
interfaces and tests. No large behavior change here, just simpler
code and fewer opportunities for confusion.
- "mm/damon: cleanup code, add test cases, and update guidances in
docs" (SJ Park):
Clean up DAMON's core and interfaces, add missing test cases and
bring the documentation into line with the code. These changes should
make the newer facilities easier to understand and maintain.
- "mm/damon: introduce hugepage_size probe filter" (SJ Park):
Add a DAMON probe filter for hugepage size. Let users select a range
of folio sizes through sysfs, validate the range and document the new
interface, so monitoring can concentrate on memory backed by the
desired hugepage sizes.
- "selftests/mm: pagemap_ioctl test fixes and cleanups" (Zenghui Yu):
Fix some pagemap ioctl test assumptions and clean up their setup and
reporting. Make failures point to the operation that went wrong
rather than to test harness bookkeeping.
- "mm: avoid large folio splits when swap is unavailable" (Johannes
Weiner):
Avoid splitting large folios merely to attempt swap when no swap
space is available. There is little point paying for an expensive
split when reclaim cannot actually swap the resulting pages out.
- "mm: workingset: fix the shadow node budget under MGLRU" (Hui Zhu):
Fix the workingset shadow-node budget with MGLRU enabled. Keep the
shadow entries within the intended limits so refault tracking does
not quietly consume more metadata than it should.
- "selftests/mm: TAP output and global-state fixes" (Song Hu):
Fix selftests which produce misleading TAP output or fail to restore
global settings after a run. A test ought to leave the system as it
found it, particularly when a whole suite follows behind.
- "mm: remove page_swap_entry()" (Tal Zussman):
Remove page_swap_entry() and convert its remaining users to the folio
and swap-entry helpers. Lose an old page-level interface and make the
swap paths a little more consistent.
- "mm: refactor zonelist constructors and iterators" (Gregory Price):
Refactor the zonelist construction and walk helpers to reduce
duplicated logic. Keep the allocation ordering rules intact while
making it clearer how zones are selected.
- "mm: kmemleak: batch the struct page scan" (Breno Leitao):
Scan adjacent struct pages in batches instead of taking kmemleak_lock
once for every single page. This preserves scan coverage and the
lock-hold bound, while cutting overhead substantially on debug
kernels.
- "mm/damon: misc improvements in tests and documents" (Zenghui Yu):
Fix some DAMON selftests which leave kdamond running or fail under
Python safe-path mode, and improve the KUnit coverage and
documentation. Nothing especially glamorous, but these are worth
doing.
- "mm/damon: introduce probe_hits_wsum DAMOS core filter" (SJ Park):
Add a DAMOS core filter using weighted probe-hit counts. This gives
schemes another way to select regions based on what the monitoring
probes observed.
- "mm/mglru: fix ineffective memory protection for non-kswapd reclaim"
(Ridong Chen):
Fix MGLRU's memory protection handling for reclaim outside kswapd.
The protection settings weren't having the intended effect in these
paths, leaving protected memory more exposed than requested.
- "mm/damon: improve readability, clarity and test coverage" (SJ Park):
Simplify a handful of DAMON core helpers, clarify their behavior and
expand test coverage. There are no intended userspace-visible changes
in this batch.
- "mm: replace PF_KCOMPACTD/PF_KSWAPD with kthread_func()" (Kefeng
Wang):
Stop identifying reclaim and compaction workers through the PF_KSWAPD
and PF_KCOMPACTD task flags. Use their kthread functions instead and
remove the redundant flag plumbing.
- "mm/hugetlb: fix surplus accounting and availability checks during
demotion" (Longlong Xia):
Fix HugeTLB surplus accounting and availability checks when demoting
huge pages. Keep the counters and reservation decisions consistent as
one huge page turns into several smaller ones.
- "mm/damon: add kunit tests for probe_hits handling and probe params
validation" (Jason Angelov):
Add KUnit tests for DAMON probe-hit handling and invalid probe
parameters. These cover edge cases that were too easy to miss in
ordinary monitoring tests.
- "mm/damon: fix misc bugs in kunit, quota goals and sysfs refresh_ms"
(SJ Park):
Fix a few DAMON bugs in KUnit tests, quota-goal handling and the
sysfs refresh interval. Small fixes, but the incorrect results and
control behavior were real.
- "mm: zswap: optimize zswap invalidate and store" (Kefeng Wang):
Simplify zswap's invalidate and store paths to avoid avoidable
lookups and work. Keep the entry lifetime rules intact while making
those frequent operations cheaper.
- "mm: replace custom ratelimiting logic" (Pedro Falcato):
Replace hand-rolled MM rate limiting with the common kernel helpers.
There is no need to maintain another local version of the same
mechanism.
- "mm/vmalloc: minor cleanups" (Ye Liu):
Tidy some vmalloc initialization and reporting code, and pull
duplicated vmap-area insertion work into a helper. No functional
changes are intended.
- "mm/mglru: clean up isolate_folios for readability and clarity"
(Ridong Chen):
Clean up MGLRU's isolate_folios() so the decisions are easier to read
and verify. Keep reclaim behavior unchanged while removing
unnecessary twists in the control flow.
- "Catch automatic storage in IDA and Maple Tree definitions" (Yury
Norov):
Catch IDA and maple-tree definitions placed in automatic storage
where the lifetime rules are wrong or easy to get wrong. Add checks
so such mistakes are harder to slip through unnoticed.
- "mm, swap: some random fixes and cleanups" (Kemeng Shi):
Fix and simplify a few unrelated swap paths, removing redundant work
and tidying up error handling. A small collection of things which
were better fixed than left lying around.
- "mm/page_io: folio conversion cleanups" (Tal Zussman):
Finish some page-to-folio conversions in swap I/O, removing obsolete
wrappers and using folio operations consistently. The I/O behavior is
intended to remain the same.
- "mm/swap: skip empty clusters in the swapoff scan" (Youngjun Park):
Skip empty swap clusters during swapoff instead of walking slots
which have nothing to release. This avoids pointless work on sparsely
used swap devices.
- "mm: trace: decode architecture-specific VMA flags" (Meijing Zhao):
Teach the VMA trace output to decode architecture-specific flags,
rather than leaving them as unexplained bits. That should make
tracing a good deal more useful when debugging unusual mappings.
- "mm, swap: don't spin on a bad swap entry" (Breno Leitao):
Stop repeatedly retrying a swap entry which is already known to be
bad. Make the error path terminate cleanly instead of wasting CPU
chasing an entry that cannot be used.
- "mm/page_isolation: fix UBSAN shift-out-of-bounds in
isolate_single_pageblock" (Qi Xi):
Fix an out-of-range shift in isolate_single_pageblock() and tighten
its associated boundary handling. UBSAN found the issue; the result
should be more robust pageblock isolation.
- "mm: khugepaged: fix tracepoint UAF" (Vernon Yang):
Fix a use-after-free in khugepaged tracepoint handling. Make sure the
information recorded by tracing stays valid for as long as the trace
event needs it.
- "mm/damon: fix DAMOS bugs in core, paddr and vaddr" (SJ Park):
Fix several DAMOS problems across the core and physical- and
virtual-address backends. The changes close error cases and bring the
implementations back into agreement.
- "mm/hugetlb_cgroup: move the per-node usage along with the folio"
(Hongfu Li):
Move HugeTLB per-node usage accounting when folios migrate between
nodes or are reparented to another cgroup. Otherwise numa_stat can
retain stale charges and even underflow when the folio is freed.
- "docs/core-api: memory-allocation: add k[mz]alloc_obj() and clarify
kmalloc" (Mike Rapoport):
Document the typed k[mz]alloc_obj() allocation helpers and clear up
some kmalloc guidance. Make it easier for callers to choose the right
interface.
- "selftests/mm: Validate selections and scope memfd_secret setup"
(Tianyi Chen):
Check selftest selections before running and confine memfd_secret
setup to the cases that actually need it. Avoid confusing failures
caused by the test harness itself.
- "mm/damon: move zero damos quota target_value handling to the core
layer" (SJ Park):
Handle a zero DAMOS quota goal target in the core rather than making
each user of the interface invent its own rule. Keep quota decisions
consistent across callers.
- "mm/damon: Introduce a huge page collapsing mechanism using auto
tuning" (Asier Gutierrez):
Add an auto-tuned DAMON mechanism for collapsing huge pages. Use
monitoring feedback to decide when collapse is worthwhile rather than
forcing one fixed policy onto every workload.
- "kmemleak: fix stale documentation and raise the verbose default"
(Breno Leitao):
Bring the kmemleak documentation up to date and require a third
confirming scan before verbose kernels print a suspected leak. The
extra scan helps suppress transient false positives in noisy debug
builds.
- "mm/memory: improve insert_pages() error handling" (Avi Weiss):
Tighten insert_pages() error handling so partial failures are
reported and cleaned up consistently. The caller should not have to
guess how far the operation got.
- "mm/damon: allow NULL or unstarted damon_ctx parameter for
damon_call()" (SJ Park):
Make damon_call() handle NULL and not-yet-started contexts safely.
Simplify the rules for callers and avoid an indefinite wait on an
invalid state.
- "mm/damon: introduce pgidle_set probe filter type" (SJ Park):
Add a pgidle_set DAMON probe filter, giving monitoring users another
way to select pages by their idle-tracking state. Wire it through the
filter interfaces and tests.
- "mm/damon/core: remove unused helper functions" (Cheng-Han Wu):
Remove DAMON core helpers which no longer have callers. Keep the API
surface smaller rather than retaining dead code just in case.
- "mm: stop calling pmd_folio() on special PMDs" (Gregory Price):
Avoid calling pmd_folio() on special PMD mappings that have no struct
page. The old assumption could fault in procfs walkers; use the
normal-folio checks and handle those mappings properly.
- "mm: remove three unused helpers from mm.h" (Tal Zussman):
Remove three unused helpers from mm.h. Fewer obsolete interfaces for
the next person to stumble over.
- "mm/damon: improvements in efficiency, error handling, documents"
(Liew Rui Yan):
Skip needless DAMOS quota work once the quota is full, propagate a
missing sysfs error and tidy a couple of comments. The ignored error
could make a monitoring-start request appear successful when it
wasn't.
- "docs/mm/damon/design: add explanation of nr_snapshots" (Liew Rui
Yan):
Explain DAMON's nr_snapshots accounting in the design documentation
and straighten out the associated terminology. Make it clearer what
users should expect from that counter.
- "selftests/cgroup: fixes for test_zswap on single core VM" (Wilson
Felipe Pereira):
Fix two test_zswap failures on single-CPU VMs. Wait for the exiting
child's cgroup to become unpopulated before reconfiguring it, and
avoid another test assumption which breaks under constrained
scheduling.
- "docs/ksm: fix advisor documentation and comment" (Jinjiang Tu):
Correct the KSM advisor documentation and a misleading code comment.
Keep the description aligned with how the advisor actually works.
- "Fix bugs in HugeTLB allocation when mem_cgroup_charge_hugetlb()
fails" (Ackerley Tng):
Fix HugeTLB allocation cleanup when the memcg charge fails. Make sure
failure exits undo what was allocated rather than leaving stale
accounting or resources behind.
- "mm, memcg: fix memory.peak reset clobbering other fds' watermark"
(Ridong Chen):
Fix memory.peak reset handling so resetting one file descriptor
doesn't overwrite the watermark kept for another. Keep those per-open
measurements independent as intended.
- "mm: reject zone device folios in more folio walkers" (Gregory
Price):
Reject zone-device folios in page walkers that cannot safely handle
them. Extend the existing checks rather than assuming every folio has
ordinary system-memory backing.
- "percpu: remove code with no effect" (Sang-Heon Jeon):
Remove a few pieces of percpu code which no longer do anything. There
is no reason to keep maintaining dead paths.
* tag 'mm-stable-2026-10-19-21-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (539 commits)
mm: shmem: assign a lock class to the unused huge shrinklist
mm: vmscan: put rotation-missed folios at the LRU tail
mm: kmemleak: scan the struct page array in MAX_SCAN_SIZE batches
mm: kmemleak: move the struct page scan into a helper
mm/damon: document that a zero sample_interval is accepted
mm/damon: fix typos in comments
mm/damon/sysfs: propagate damon_call() error in turn_damon_on
mm/damon/core: skip quota score setup when the quota is full
mm/damon/tests/core-kunit: test the size charged for a filter-trimmed region
mm/damon/core: charge only the part of a region the filter left
mm: disallow raw PFN mappings of huge/shared zeropage
selftests/mm: zap whole PTE tables in the khugepaged race harness
selftests/mm: add memory-pressure threads to the khugepaged race harness
selftests/mm: race the collapse of windows with holes
selftests/mm: add khugepaged race harness
selftests/mm: check that one khugepaged pass collapses one window
selftests/mm: run every supported collapse order by default
selftests/mm: cover a shared-source collapse write race
selftests/mm: parameterize the mixed-source collapse case by source order
selftests/mm: add order-parameterized khugepaged collapse cases
...
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Fix algif_skcipher source SG overrun
- Allow hmac(sha512) for non-root users
Algorithms:
- Add wrapper for zeroing AES key context
- Avoid redundant stream initialisations in zstd
Drivers:
- Remove hisilicon/sec.
- Handle digest-only authenc requests in atmel
- Handle zero-length skcipher requests in mxs-dcp
- Lower the default priority of caam/qi2
Others:
- Optimise key comparison in rhashtable lookup that uses constant
parameters"
* tag 'v7.4-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (146 commits)
crypto: atmel-tdes - consolidate error paths in atmel_tdes_dma_init()
crypto: atmel-tdes - reuse fast in atmel_tdes_crypt_start()
crypto: atmel-tdes - use separate DMA scatterlists
MAINTAINERS: delete entry for John Allen
hwrng: amd - use PMBASE_OFFSET consistently
hwrng: cctrng - simplify cctrng_probe()
hwrng: intel - simplify intel_rng_mod_init()
crypto: qat - fix use of destroyed vf2pf_lock on VF restart
crypto: qat - initialise state_lock on every path in adf_devmgr_add_dev()
hwrng: imx-rngc - Use optional clock
crypto: talitos - init tasklets before requesting IRQs
crypto: algif_skcipher - rewind rounded output bytes
crypto: algif_hash - Allow hmac(sha512) for unpriviledged users
crypto: sa2ul - Remove unused fields
hwrng: stm32 - use devm_platform_ioremap_resource() in stm32_rng_probe()
hwrng: stm32 - drop redundant initializations
hwrng: amd - simplify control flow in amd_rng_mod_init()
hwrng: stm32 - reuse clock rate in stm32_rng_clock_freq_restrain()
hwrng: stm32 - use swap() in stm32_rng_probe()
hwrng: cctrng - drop redundant initializations
...
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|
Pull ARM updates from Russell King:
- remove supersection support
- set "current" earlier to avoid KASAN issues
- fix a couple of corner cases in the alignment handler
- fix wrong free function in iommu allocation path
- cacheinfo updates
- properly align hugetlb mappings
- always set endianness on xscale
- fix clang backtracer
- avoid replacing active_asids if already 0
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux:
ARM: 9493/1: asid: Do not replace active_asids if already 0
ARM: 9490/1: backtrace-clang: fix wrong sp usage for unwinding
ARM: 9482/5: decompressor: always set endianess on xscale
ARM: 9524/1: mm: align hugetlb mappings to the huge page size
ARM: 9523/1: topology: allocate the cacheinfo early on the boot CPU
ARM: 9522/1: cacheinfo: guard the CLIDR read in populate_cache_leaves()
ARM: 9521/1: cacheinfo: count external caches in early_cache_level()
ARM: 9520/1: cacheinfo: avoid out-of-bounds write in populate_cache_leaves()
ARM: 9519/1: dma-mapping: Fix wrong free function in __iommu_alloc_simple() error path
ARM: 9492/1: alignment: fix LSR #32 and ASR #32 offset decoding
ARM: 9491/1: alignment: restore uaccess state on emulation fault
ARM: 9488/1: smp: set current pointer in assembly before jumping into C
ARM: 9486/1: set !LPAE MAX_PHYSMEM_BITS to 32 and remove supersection mappings
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Pull ARM SoC board file updates from Arnd Bergmann:
"These are mostly smaller cleanups for the remaining platform code in
arch/arm/, the most notable one being the conversion of the
s3c/crag6410 board to use software nodes for GPIO references in place
of plain GPIO numbers.
The earlier plan was to drop the deprecated (since 7.3) board files
here, which would have been a much larger set of changes, but that is
now deferred to 7.5"
* tag 'soc-arm-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
MAINTAINERS: Drop arm64 dts/intel path from ARM/SOCFPGA ARCHITECTURE
ARM: tegra: Fix Trun -> Turn typo
ARM: vexpress: fix device_node refcount leak in vexpress_smp_dt_prepare_cpus()
ARM: vexpress: fix device_node refcount leak in vexpress_flags_set()
MAINTAINERS: Change ARM Visconti5 architecture maintenance status to Odd Fixes
ARM: mvebu: fix Cortex-A9 errata selection for Armada 38x
ARM: OMAP2+: remove unused ctrl_module_wkup_44xx.h header
ARM: EXYNOS: Replace __ASSEMBLY__ with __ASSEMBLER__
ARM: s3c: crag6410: use software nodes/properties to set up GPIO keys
Input: samsung-keypad - remove support for platform data
ARM: s3c: crag6410: switch keypad device to software properties
ARM: s3c: register and attach software nodes for Samsung gpio_chips
Input: samsung-keypad - handle compact binding
dt-bindings: input: samsung,s3c6410-keypad: introduce compact binding
ARM: imx6q: remove KSZ9021 PHY fixup
ARM: imx: Fix suspend/resume crash with Clang CFI
ARM: OMAP2+: Replace __ASSEMBLY__ with __ASSEMBLER__
soc: imx: Replace __ASSEMBLY__ with __ASSEMBLER__ in header file
ARM: imx: Replace __ASSEMBLY__ with __ASSEMBLER__
MAINTAINERS: Add git tree for TI K3 ARCHITECTURE
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC defconfig updates from Arnd Bergmann:
"Only a few new drivers get enabled this time.
The size of the defconfigs actually shrinks here, though that is only
the result of all the Qualcomm clock drivers now being configured as
modules by default when the corresponding platforms are enabled"
* tag 'soc-defconfig-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
arm64: defconfig: Update coreboot firmware symbols
arm64: defconfig: Enable I3C and SPD5118 hwmon
arm64: defconfig: Enable EMC2305 and PCA963x drivers
arm64: defconfig: Switch Qualcomm SDM845, SM8150 and SM8250 drivers to modules
ARM/arm64: defconfig: Drop redundant Qualcomm clock entries
arm64: configs: defconfig: Convert TISCI to modules
arm64: defconfig: Enable PMIC5 Gen3 ADC thermal monitor
arm64: defconfig: Enable QMP PCIe Multi-PHY driver
ARM: shmobile: defconfig: Refresh for v7.3-rc1
arm: multi_v7_defconfig: Enable SND_ALOOP
arm64: defconfig: enable the necessary drivers for the Ayaneo Pocket S2
ARM: omap2plus_defconfig: Support for compressed firmware
ARM: omap2plus_defconfig: Enable SND_ALOOP
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC driver updates from Arnd Bergmann:
"There are lots of minor updates for driver subsystems managed through
the soc tree (turris-omnia platform, cache driver, tee drivers,
arm-cci, bus, memory) as well as soc vendor specific drivers
(starfive, xilinx, microchip, nxp, amlogic, imx, renesas, samsung, ti,
nvidia).
The more notable changes are:
- Larger updates for Qualcomm SoCs including support for SM8950
(Maili) SM8975 (Hawi), Glymur, Shikra, and IPQ5424
- Added SoC support for Exynos5515, Tegra264, Tegra410, R8A774A3, and
MT8167 in existing drivers
- Arm SCMI firmware driver support for ACPI PCC transport and module
autoloading of protocol specific drivers
- Apple crash log support for CrgA embedded controller"
* tag 'soc-drivers-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (176 commits)
platform: cznic: turris-omnia-mcu: stop button emulation producers
cache: Make cpu_cache_invalidate_memregion() error out if there are no handlers
soc: mpfs: use kref cleanup on probe failure
arm64: enable HAVE_SHARED_GPIOS for all ARM64 platforms
bus: arm-cci: Drop cci-control-port node reference in __cci_ace_get_port()
bus: arm-cci: Drop CPU node reference in cci_ace_init_ports()
soc: fsl: dpio: Free the IRQ before releasing the I/O object
soc: fsl: dpio: Fix cleanup on IRQ registration failure
bus: fsl-mc: Annotate fsl_mc_io.portal_virt_addr with __counted_by_ptr
bus: fsl-mc: drop the fwnode links of the dpmacs nodes
soc: fsl: cpm1: tsa: Fix clock leak in tsa_of_parse_tdms()
soc: qcom: geni-se: Drop unused icc_ddr parameter from geni_icc_get()
firmware: qcom: scm: Allow QSEECOM on ThinkPad T14s Gen 7
dt-bindings: mailbox: qcom: Document Maili CPUCP mailbox controller
dt-bindings: spmi: glymur-spmi-pmic-arb: Add compatible for Qualcomm Maili SoC
soc: qcom: pmic_pdcharger_ulog: prevent work requeue during remove
ASoC: dt-bindings: qcom,apr: Add modem_apps GLINK channel for shikra
firmware: qcom: tzmem: disable SHM bridge for SM7125 platform
soc: qcom: ubwc: Add Kalambo UBWC config
firmware: qcom: scm: Allow QSEECOM on Kalambo CRD
...
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Pull SoC devicetree updates from Arnd Bergmann:
"This is a rather large update of over 1000 non-merge commits touching
devicetree files and bindings.
A few notable SoC were added this time:
- Apple M4 and A18 Pro are used in laptops, these follow the M3 model
added in 7.2.
- Google Laguna (aka Tensor G5) is used last year's Pixel phone
generation. Unlike the earlier Tensor chips, this is not based on
Samsung's Exynos family design but starts a new chip family.
- Qualcomm's Hawi and Nord SoCs are two powerful chips using the
custom Oryon cores. Product names and applications are so far not
known, which means that Qualcomm is doing something right by
upstreaming kernel support early.
The ST stm32mp23xc/stm32mp25xc SoC support was previously removed
because there were no users upstream, but they are back now that
boards have shown up. Renesas RZ/G2M v3.0 (R8A774A3) is just a minor
variation of the already supported SoC.
In total, there are 81 new dts files for individual boards, and they
are all over the place. Only one riscv based machine is added, the
Milk-V Meles SBC using the T-Head th1520 chip. For 32-bit Arm, we have
13 new boards. About half are industrial embedded boards using NXP
i.MX6/7 chips, the rest are older products: two Amazon tablets, two
Motorola phones and two SoM boards.
Everything else is 64-bit Arm:
- many industrial embedded boards using NXP layerscape, NXP i.MX8/9,
Qualcomm Hamoa, ST stm32mp2, Rockchip rk35xx, and Renesas RZ/G2
SoCs
- Laptops and tablets using Apple M4, Qualcomm Snapdragon X2,
Snapdragon X1 Elite and Allwinner A133 chips
- Valve Steam Frame VR headset using Snapdragon 8 Gen 3
- Seven handheld game consoles using Qualcomm Dragonwing qcs8550
- Mobile phones using Google Tensor G5, Samsung Exynos 850, and
various Qualcomm Snapdragon chips
Aside from the new stuff, there is still a lot going on for existing
socs and boards, including GPU hardware support on MediaTek MT8173
based laptops. Most patches actually add features this time, as the
compile-time diagnostic changes are slowing down"
* tag 'soc-dt-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (1022 commits)
arm64: dts: rockchip: Add Radxa E54C
dt-bindings: arm: rockchip: Add Radxa E54C
arm64: dts: rockchip: remove FRL GPIO for 100ASK DshanPi A1
arm64: dts: rockchip: fix M.2 E-key reset pinctrl on rk3588 rock-5-itx
arm64: dts: rockchip: add pcie30phy data-lanes on rk3588 coolpi-cm5-evb
arm64: dts: rockchip: Add the fan tachometers to Kobol Helios64
arm64: dts: rockchip: enable NPU on Radxa E52C
arm64: dts: rockchip: fix adc button voltage on Radxa E52C
riscv: dts: sophgo: sg2002-milkv-duo256m: drop reserved memory node
riscv: dts: sophgo: cv1800b-milkv-duo: drop reserved memory node
arm64: dts: nuvoton: npcm845-evb: Add peripheral nodes
arm64: dts: nuvoton: npcm845-evb: Fix DTS coding style
arm64: dts: nuvoton: npcm845: Add peripheral nodes
arm64: dts: nuvoton: npcm845: Split APB address ranges
riscv: dts: sophgo: cv180x: Fix internal ephy node name
riscv: dts: sophgo: add Milk-V Duo 256M ethernet support overlay
riscv: dts: sophgo: Limit SG2042 SPI NOR to 12.5 MHz
riscv: dts: sophgo: Enable SPI NOR on SRD3-10
riscv: dts: spacemit: set ETH MAC from eeprom for OrangePi
arm64: dts: allwinner: sun50i-h616: Add video engine
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull VDSO updates from Thomas Gleixner:
"Updates for the VDSO subsystem:
- Ensure that the CLOCK_AUX base calculations are properly scaled
against the base timekeeper. The update function failed to take the
fractional nanosecond part into account, which results in a
rounding error.
- Cleanup and consolidate the vsyscall headers to get rid of
pointless copies all over the architectures.
- Replace a runtime conditional in the time getter function for
namespaced clocks by simple pointer arithmetic which speeds up the
read function"
* tag 'timers-vdso-2026-10-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
vdso/vsyscall: Keep the CLOCK_AUX base scaled
vdso/math64: Add and use __iter_div64_u64_rem()
vdso/math64: Use OPTIMIZER_HIDE_VAR() in __iter_div_u64_rem()
vdso/gettimeofday: Avoid runtime conditional in do_hres_timens()
vdso: Remove __ASSEMBLER__ guards from vsyscall.h
vdso: Add asm-generic/vdso/vsyscall.h
vdso: Remove unnecessary vdso/vsyscall.h includes
riscv/hwprobe: Include vdso/datapage.h
arm64/vdso: Delete asm/vdso/vsyscall.h inclusions
x86/vdso: Delete asm/vdso/vsyscall.h inclusions
sparc/vdso: Delete asm/vdso/vsyscall.h inclusion
s390/vdso: Delete asm/vdso/vsyscall.h inclusions
sparc/vdso: Move __VDSO_PAGES to asm/vdso.h
x86/vdso: Move vDSO page definitions to asm/vdso.h
vdso: Delete asm-generic/vdso/vsyscall.h
vdso/vsyscall: Define fallback time synchronization functions in vsyscall.c
vdso/getrandom: Define fallback __arch_get_vdso_u_rng_data() in getrandom.c
vdso/gettimeofday: Define fallback __arch_get_vdso_u_time_data() in gettimeofday.c
vdso: Move the kernel-side time update helpers to a new header
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git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux
Pull Kbuild / Kconfig updates from Nathan Chancellor:
"Kbuild:
- Suppress compiler flags in debug info for external module builds
- Use '-fmacro-prefix-map' in more places in the build
- Merge initial set of changes from Lorenzo's speed up series, along
with some fixes found through testing:
- Avoid allocating .modinfo in vmlinux
- Speed up kallsyms by indexing symbols by token and outputting
binary data to disk directly then including in assembly via
.incbin
- Don't sort $(NM) output when unnecessary
- Only emit relocations on the final vmlinx link
- Reimplement mksysmap in C
- Move many cc-option and ld-option calls into the Kconfig stage to
cache their results
- Use pigz for gzip compression when available
- Move gen_init_cpio and gen_initramfs.sh from usr/ to scripts/
- Add a TOML configuration to scripts/container and update
documentation accordingly
- Add a generic, opt-in mechanism for checking that headers can
compile standalone
- Update machine function splitting argument for LLVM 24 rename in
AutoFDO build
- Miscellaneous minor clean ups, fixes, and hardening, mostly
found/fixed via LLMs
Kconfig:
- Turn recursive ranges into an error
- Fix savedefconfig for defaults that were adjusted for being out of
range and revert a previously applied workaround
- Improvements and hardening around integer and hexadecimal values
- Emit a warning when selecting or implying a choice symbol, which
has no effect
- Emit a warning when KCONFIG_PROBABILITY is malformed
- Introduce def_string / def_int / def_hex to mirror the existing
def_bool / def_tristate to succinctly set a value and type at the
same time.
- Add cc-option-str and ld-option-str macros to act like Kbuild's
cc-option and ld-option, returning the string when the option is
supported, allowing many checks to be moved into Kconfig
- Minor usability improvements to Kconfig tests"
* tag 'kbuild-7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux: (59 commits)
kbuild: AutoFDO: Update split machine function argument for upstream rename
kbuild: Mark the initcall ordering recipe as recursive
kbuild: Mark the gzip recipes as recursive
localmodconfig: Explicitly report boolean configs during integrity check
scripts/make_fit: Ignore schema checks when decomposing DTBs
clang-tools: Import os for broken pipe handling
kconfig: use the value argument in sym_get_near_range_bound()
kconfig: fix infinite loop in conf_choice() when no choice value is visible
kconfig: cleanup stale comment about 'keys' array
kconfig: Improve ergonomics around disabling warnings with cc-option
scripts/Kconfig.toolchain: Drop compiler symbols from dependencies
checkkconfigsymbols.py: Parse Git status output line by line
gen_init_cpio: stop parsing on lines with a missing argument list
.gitignore: drop Module.markers
.gitignore: ignore pacman package signatures
kbuild: add header check facility as a manually run static analyzer
Documentation: dev-tools: refer to user ID rather than id
Documentation: dev-tools: update container.rst with config file
scripts: add TOML config to container tool
kconfig: tests: {old,save}defconfig: Forward dynamic keyword arguments
...
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This is long over-due: the __get_user() and __put_user() functions are
entirely historical, and are never the rigth thing to use any more. And
when mis-used (read: every case) they are not only slower than the right
thing, but also insecure because they don't check the user address
range.
Most of the usage sites have been converted long ago, but various
left-overs remained. So this started out as a single patch that I wrote
as a "show people how to convert __{get,put}_user() to modern code".
In particular, Thomas last year implemented the very nice new scoped
user access region helpers (see commit e497310b4ffb: "uaccess: Provide
scoped user access regions") that makes the modern interfaces
particularly easy to use and really removes any excuse for the old
horrors.
That small example patch then grew to this, partly using Claude as a
glorified coccinelle script to apply the pattern to other places.
There were a few different reasons for using __put_user() and
__get_user() rather than the alternatives, but the original historical
one was performance: when doing multiple accesses off the same base
pointer, doing a single range check followed by multiple non-checked
accesses used to create smaller and faster code.
The keyword here is "used to". It hasn't been true for years, because
the range check isn't actually the real cost these days. The real cost
of user accesses on modern hardware is turning the user accesses on and
off in the first place (on x86, using the STAC/CLAC instructions).
Those sequences get turned into 'scoped_user_read_access() { }' blocks,
see for example that first patch in the series: "signal: use scoped user
access for old-style sigaction".
Another, historical reason for using __get_user() and friends is that
you actually want to do a kernel pointer access, but the pointer might
not be entirely reliable (typically during fault handling), so you want
to have exception handling for the kernel access.
The modern way to do that kind of non-faulting kernel access is using
"get_kernel_nofault()", but some code predates that helper existing at
all, and used __get_user() as a way to just get a memory access with
exception handling. For that pattern, see for example "alpha: use
get_kernel_nofault() in dik_show_code()"
A third bad reason for using __get_user() and friends was that the
proper get_user() had a "might_fault()" in it, and code that ran in
atomic regions but hadn't disabled page faults would result in a
warning. That kind of code needs to explicitly disable page faults,
because "atomic region" is not well defined at run-time and can be
invisible (eg a preempt-off region in a non-preemptible kernel).
See "vdpa_sim: disable page faults around vringh_need_notify_iotlb()"
for an example of that pattern, where the local_bh_disable() now also
grows a pagefault_disable(), which makes the normal get_user() no longer
warn about the user access in non-process context, because it can see
that the potential page fault will not cause problems.
And finally, the really nasty reason to use __get_user() and friends:
pointers that can be either kernel pointers or user pointers. We've
gotten rid of almost all such cases, but a couple remained. See for
example "x86/sev: Use explicit user-or-kernel accessors for #VC memory
operands".
NOTE! This series removes all __get/put_user() calls from generic code
but only does the final removal of the whole interface on x86. Other
architectures have not been entirely converted, for a variety of reasons:
- arm64 makes __{get,put}_user() be exactly the same as
{get,put}_user() so it's harmless and didn't have the dangers of the
legacy use cases.
- any architecture that uses <asm-generic/uaccess.h> will still use
__{get,put}_user as the underlying helper function name
- several architectures had some legacy uses that weren't entirely
trivial and I didn't want to extend this patch series to things that
I don't know and that don't really matter.
but I did do a couple of the obvious "follows the exact same pattern"
just because it could be done mindlessly and automatically.
Let's see if I broke anything, but we should have done this years ago.
* uaccess-cleanups: (48 commits)
drm/i915/gem: ignore errors on presumed_offset write-back
powerpc/align: use get_user_instr() for a user-mode instruction
powerpc/signal64: use scoped user access in setup_trampoline()
powerpc/signal64: use get_user() for the single context reads
powerpc/signal32: use get_user() for the single context reads
KVM: PPC: Book3S HV: use get_user()/put_user() for the HPT fd
powerpc/powernv: use get_user()/put_user() in the LPC debugfs files
s390: use get_user()/put_user() instead of the unchecked variants
ARM: OABI: use scoped user access in epoll_put_uevent()
ARM: signal: stop using __put_user() for the signal frame
ARM: signal: check the FDPIC function descriptor address
alpha: split the prefetch check in do_page_fault() by mode
openrisc: use get_kernel_nofault() in show_registers()
alpha: use get_kernel_nofault() in dik_show_code()
nios2: use scoped user access for the signal frame
nios2: check the signal frame address before writing to it
hexagon: use scoped user access for the signal frame
alpha: use scoped user access when setting up signal frames
alpha: use scoped user access in the sigreturn path
alpha: use scoped user access in osf_sigaction()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf events updates from Ingo Molnar:
- Support SIMD/eGPRs/SSP register sampling in perf
(Dapeng Mi, Kan Liang)
- Turn amd_uncore_ctx events into a flexible array (Rosen Penev)
- Finish the work related to fixing the guest PEBS path to not
set unwanted PERF_GLOBAL_CTRL bits, for which urgent fixes
are upstream already (Sean Christopherson)
- Drop redundant counter slot searches in the AMD uncore
driver (Usama Arif)
- Don't WARN when the ext_regs_buf allocation fails (vineash)
- Annotate x86_pmu::hybrid_pmu with __counted_by_ptr (Thorsten Blum)
* tag 'perf-core-2026-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
perf/x86: Don't WARN when the ext_regs_buf allocation fails
perf/x86/amd/uncore: Free counter slot by index
perf/x86/amd/uncore: Remove redundant event slot scan
perf/x86/intel: Check only PMC bits in PEBS_ENABLED when detecting host PEBS usage
KVM: VMX: Only tell perf to enable PEBS counters for fully enabled PMCs
KVM: VMX: Drop a redundant pmu->global_ctrl check when processing pebs_enable
perf/x86/intel: KVM: Handle cross-mapped PEBS PMCs entirely within KVM
perf/x86: KVM: Have perf define a dedicated struct for getting guest PEBS data
perf/x86/intel: Invert names of intel_ctrl_{guest,host}_mask
perf/x86/intel: Annotate x86_pmu::hybrid_pmu with __counted_by_ptr
perf/x86/amd/uncore: Turn amd_uncore_ctx events into a flexible array
perf/x86/intel: Add sanity check for PEBS record/fragment size
perf/x86: Activate back-to-back NMI detection for arch-PEBS induced NMIs
perf/x86/intel: Advertise PERF_PMU_CAP_SIMD_REGS capability
perf/x86/intel: Support arch-PEBS based SIMD/eGPRs sampling
perf/x86: Support SSP sampling using sample_regs_* fields
perf/x86: Support eGPRs sampling using sample_regs_* fields
perf: Enhance perf_reg_validate() with simd_enabled argument
perf/x86: Support OPMASK sampling using sample_simd_pred_reg_* fields
perf/x86: Support ZMM sampling using sample_simd_vec_reg_* fields
...
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The generic epoll_put_uevent() writes the two fields of each event
inside scoped_user_write_access_size(). The ARM override, which also
handles the packed OABI layout, still does it with __put_user(), relying
on the access_ok() that ep_check_params() does on the whole array.
Do it the same way as the generic version, for both layouts. ARM has no
user_access_begin(), so the accesses are the same as before.
This is part of getting rid of __get_user() and __put_user() entirely.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The signal frame is checked with access_ok() once, in get_sigframe(),
and a few of its fields are then written with __put_user(): the ucontext
flags and link, the end marker after the coprocessor state, and the
sigreturn trampoline words.
Use scoped_user_write_access() with unsafe_put_user() where there are
several writes in a row, and put_user() for the two single ones. ARM
has no user_access_begin(), so the scopes are the same access_ok() and
the same accesses as before.
This is part of getting rid of __get_user() and __put_user() entirely.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When a task has FDPIC_FUNCPTRS in its personality, setup_return() treats
the signal handler as a pointer to a function descriptor and reads the
entry point and GOT pointer from it with __get_user(). Nothing checks
that pointer: it is whatever the task passed to sigaction(), and any
task can set FDPIC_FUNCPTRS with personality(2). BINFMT_ELF_FDPIC is
not limited to !MMU on ARM.
On most configurations this is harmless only by accident. With
CPU_SPECTRE (ARMv7) __get_user() is get_user(). With CPU_USE_DOMAINS
(ARMv5 and older) it uses the unprivileged ldrt, but that only stops at
kernel memory when software PAN has put the kernel domain in client
mode; with ARM_PAN=n the kernel domain stays in manager mode, where
permissions are not checked. So on an ARMv6-only MMU kernel, or an
ARMv5 or older one without ARM_PAN, it reads two words of kernel memory
that end up in the task's PC and r9.
Use get_user(), which checks the address. This goes back to commit
5c16595353e0 ("ARM: signal handling support for FDPIC_FUNCPTRS
functions").
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Catalin Marinas:
"Here are the arm64 updates for 7.4.
The more interesting bits are the removal of big-endian kernel support
(already marked BROKEN for some time), preemptible this_cpu_*()
operations and MPAM support for the firmware-backed (Fb) interface.
CCA (Arm's confidential compute) is slowly trickling in with host RMI
(Realm Management Interface) support and some refactoring, including a
dedicated SMCCC bus to advertise firmware services. There are also the
usual PMU updates for new hardware and a few fixes/cleanups.
Core features:
- Remove big-endian kernel support: CONFIG_CPU_BIG_ENDIAN has
depended on BROKEN for a while, so drop the remaining code (BE
hypervisor object, BPF JIT, assembly/crypto/library routines,
endianness helper macros, selftests) and force a little-endian
build
- Add preemptible this_cpu_*() operations (read/write, RMW, xchg,
cmpxchg and cmpxchg128) that no longer need to disable preemption
around the per-CPU address generation and access
- Preparation patches for implementing CONFIG_HOTPLUG_PARALLEL on
arm64
Memory management:
- Treat faults taken by EFI runtime firmware as kernel faults
- Clear PTE_WRITE for EFI_MEMORY_RO mappings (with hardware dirty
state management enabled, this is not truly read-only)
- Raise the default ARCH_MMAP_RND_BITS for 48-bit and 52-bit VA
configurations (28/26/24 bits for 4K/16K/64K pages)
- Implement clear_page[s]() using memset()
- Enable BBML2 no-abort (a.k.a. BBML3) for the NVIDIA Rigel CPU
Perf and PMU:
- Support for HiSilicon's ITS PMU
- Add support for some new events: INST_SIMD_ALU_VEC for Apple PMUs
and a cycle counter for the latest version of HiSilicon's MN PMU
hardware
- A bunch of fixes to the CXL PMU driver to address pre-existing
issues from Sashiko
- Fix generation of PERF_RECORD_ITRACE_START records for SPE and ETM
drivers
- Reduce excessive stack consumption in the Marvell DDR PMU driver
- Minor driver updates and cleanups all over
Arm Confidential Compute Architecture (CCA):
- Add an Arm SMCCC bus for firmware services discovered through SMCCC
and move the TRNG and CCA guest (TSM provider) drivers onto it,
removing the dummy CCA platform device and adding a sysfs ABI for
Realm guests
- Move the Realm Service Interface (RSI) code out of arch/arm64/ into
drivers/firmware/arm_rmm/
- Add the host side of the Realm Management Interface (RMI): detect,
configure and activate the RMM, add SRO support and wrappers for
the Realm RMI commands
- Block hibernation (new arch hook in the PM core) and kexec while
the RMM is active. To be revisited in the future with proper
support for deactivation
- Handle Granule Protection Faults (GPFs) taken by the host, caused
by accesses to memory delegated to the RMM. In a future patch, the
exception table lookup will be limited to is_kdump_kernel() cases
MPAM (Memory Partitioning And Monitoring):
- Add support for the MPAM firmware-backed (Fb) interface, allowing
MSC accesses to be mediated by firmware
- Fix a list of theoretical issues with the driver (MSC access error
propagation, MBWU monitor save/restore and locking, resctrl class
handling, error interrupt restore, maximum number of PARTIDs)
- Add the mailing list and a missing file to the MAINTAINERS entry
- Document when to set arm64.nompam
Errata and CPU features:
- Add the NXP i.MX8QM/8QP workaround for the Cortex-A53 cache
coherency issue (ERR050104), using a new ARM64_CPUCAP_SOC_ERRATUM
capability type for SoC-level errata
Miscellaneous:
- Mask debug exceptions (DAIF) around the hardware breakpoint
register manipulations when called from generic kernel code
- Don't zero the SVE state buffer when the SVE state is live
- Return -EPERM instead of -EBUSY from the GCS prctl() locking
failures (matching x86), with the selftest updated. Slight ABI
change but no software deployment yet
- kselftest: fix unsound MTE fault skipping by introducing MTE-safe
memory accessors, avoid copying each signal test binary more than
once
- Update sysreg definitions (fix three enum values and two field
names, mark architecturally dropped fields as RES0) and remove the
TME transaction state check from the BRBE driver
- Fix the description of ARM64_HAS_LPA2 and remove a redundant
ID_AA64MMFR0 define"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (144 commits)
arm64: cpufeature: Enable BBML2 for NVIDIA Rigel
arm64: cputype: Add NVIDIA Rigel definitions
arm64: raise default ARCH_MMAP_RND_BITS for 48-bit and 52-bit VA
arm64/debug: mask debug exceptions when called from common code
kselftest/arm64: signal: copy each test binary only once
kselftest/arm64: Check for -EPERM not -EBUSY in the locking test
arm64: gcs: Return -EPERM not -EBUSY for prctl() locking failures
perf: arm_brbe: Remove the check for TME transaction states
arm64: sysreg: Mark fields the architecture dropped as RES0
arm64: sysreg: Fix the names of two misspelt fields
arm64: sysreg: Fix three incorrect enum values
arm64: smp: Defer RCU registration during secondary CPU bringup
arm64: smp: Don't bother printing the I-cache policy for each CPU
arm64: smp: Defer update of secondary CPU capabilities
arm64: smp: Tidy up cpuinfo init and cpufeature updates
arm64: smp: Tidy up smp_prepare_cpus()
arm64: cpufeature: Store every ID register with its overrides applied
arm64: cpufeature: Read MPAMIDR_EL1 in __cpuinfo_store_cpu()
arm64: cpufeature: Add read_cpuid_with_overrides()
arm64: cpufeature: Check arm64_ftr_regs[] before the first store
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into soc/dt
ARM: tegra: Changes for v7.4-rc1
The TF701T and LG X3 devices see a lot of updates and device trees are
added for the Motorola Atrix 4G and Droid X2. The core power supply is
added on Tegra114 devices to make power domains work properly. AHUB on
Tegra124 is cleaned up a bit.
* tag 'tegra-for-7.4-arm-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
ARM: tegra: lg-x3: Add backlight LED controller node
ARM: tegra: lg-x3: Add haptic engine node
ARM: tegra: lg-x3: Add flash LEDs controller node
ARM: tegra: lg-x3: Add light sensor node
ARM: tegra: lg-x3: Lower supported suspend mode
ARM: tegra: lg-x3: Remove pinctrl-* properties duplication
ARM: tegra: lg-x3: Adjust WiFi node
ARM: tegra: Add core supply for Tegra114 boards
ARM: tegra: Add device-tree for Motorola Atrix 4G and Droid X2
ARM: tegra: tf701t: Add chosen node
ARM: tegra: tf701t: Configure UART-B line used for GPS
ARM: tegra: tf701t: Complete power sensor node
ARM: tegra: tf701t: Fix BCM43341 WiFi/BT chip configuration
ARM: tegra: tf701t: Tune MMC devices
ARM: tegra: tf701t: Add thermal zones for nct1008 sensor
ARM: tegra: tf701t: Remove pin_ prefix from PMIC pinmux
ARM: tegra: tf701t: Add MC and EMC timing nodes
ARM: tegra: tf701t: Add core-supply to PMC node
ARM: tegra: tf701t: Configure CPU DFLL clock node
ARM: tegra: Clean up AHUB on Tegra124
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/dt
Qualcomm Arm32 DeviceTree updates for v7.4
Add MSM8960 wireless connectivity support by describing the RPM clock
controller, SCM, SMEM, SFPB hardware mutex, SMSM, and Riva/WCNSS nodes,
including firmware memory and Bluetooth/Wi-Fi pinctrl state. Enable Wi-Fi
and Bluetooth on the Sony Xperia SP (Huashan) board.
Fix MSM8960 USB clock descriptions by wiring the controller to the RPM
Daytona fabric clock and correcting the HS1 transceiver clock usage.
Fix MSM8974 display by adding the MDSS reset line needed for reliable DSI
bring-up, and fix the SDX55 T55 PCIe WAKE# GPIO polarity to active-low.
* tag 'qcom-arm32-for-7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
ARM: dts: qcom: sdx55: Fix PCIe WAKE# GPIO polarity
ARM: dts: qcom: msm8960: huashan: enable Wi-Fi and Bluetooth
ARM: dts: qcom: msm8960: add Riva
ARM: dts: qcom: msm8960: add SMSM & SPS
ARM: dts: qcom: msm8960: add SMEM & hwlock
ARM: dts: qcom: msm8960: add SCM
ARM: dts: qcom: msm8960: add RPM clock controller and fix USB clocks
ARM: dts: qcom: msm8974: add MDSS reset
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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soc/dt
arm64: Xilinx DT changes for 7.4
zynq:
- Fix DT indentation
* tag 'zynqmp-dt-for-7.4' of https://github.com/Xilinx/linux-xlnx:
ARM: dts: xilinx: Replace spaces indentation with tabs
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu into soc/dt
mvebu dt for 7.4 (part 1 v2)
Various fixes for Armada 388 based boards (helios4, clearfog)
Clean up indentation in dove, kirkwood and orion5x dtsi files.
* tag 'mvebu-dt-7.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu:
ARM: dts: helios4: add #phy-cells to USB nop phys
ARM: dts: helios4: use national,lm75 compatible
ARM: dts: marvell: Replace spaces indentation with tabs
ARM: dts: helios4: fix spi1 location
ARM: dts: helios4: fix vbus-supply for USB2 PHY
ARM: dts: armada-388-helios4: fix vmmc property name
ARM: dts: armada-395-gp: drop unsupported SDHCI clock-frequency
ARM: dts: marvell: add missing SDHCI clock-names
ARM: dts: armada-385-clearfog-gtr: fix vmmc property name
ARM: dts: helios4: fix lm75 supply name
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into soc/dt
Allwinner Device Tree Changes for 7.4
Main changes: H616 gained its video codec engine, while H6's video codec
engine device node was corrected. OrangePi PC2 got Ethernet LEDs added.
In addition, A20 .dtsi got a whitespace cleanup.
New boards:
- Teclast P80 tablet based on A133 SoC
* tag 'sunxi-dt-for-7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
arm64: dts: allwinner: sun50i-h616: Add video engine
arm64: dts: allwinner: sun50i-h6: Add missing IOMMU for video engine
arm64: dts: allwinner: sun50i-h6: Add missing SRAM region for video engine
arm64: dts: allwinner: h5: OrangePi PC2: add ethernet LEDs
arm64: dts: allwinner: A133: add basic support for Teclast P80 tablet
dt-bindings: arm: sunxi: Add two Teclast tablets
dt-bindings: vendor-prefixes: Add vendor prefix for Teclast
ARM: dts: allwinner: sun7i-a20: Replace spaces indentation with tabs
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into soc/dt
Ux500 second DTS update for v7.4:
- A AB8505 charger compatible and short interrupt list to go
with changes merged into the power supply subsystem.
* tag 'ux500-dts-for-7.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
ARM: dts: ux500: Use AB8505 charger compatible
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux into soc/dt
TI Keystone device tree updates for v7.4
Generic Fixups/Cleanups:
* Correct white-space style across the Keystone DTSI files
* Align devctrl child node names with dtschema naming requirements
SoC Specific Fixes:
K2G:
* Add the required #phy-cells property to the usb-nop-xceiv nodes
* Move the usb-phy nodes out of simple-bus, as they have no MMIO address
(dtbs_check fixes)
K2L:
* Rename the deprecated ti,davinci-spi-num-cs property to the standard
num-cs (dtbs_check fix)
* tag 'ti-keystone-dt-for-v7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux:
ARM: dts: ti: keystone: k2g: Move usb-phy nodes out of simple-bus
ARM: dts: ti: keystone: k2g: Add required #phy-cells to usb-nop-xceiv nodes
ARM: dts: ti: keystone: Correct white-space style
ARM: dts: ti: keystone: Align devctrl child node names with dtschema
ARM: dts: ti: keystone: k2l: Rename ti,davinci-spi-num-cs to num-cs
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These headers are only used from regular C code.
Remove the unnecessary guards.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260909-vdso-asm-generic-vsyscall-h-v1-15-63ae856cc659@linutronix.de
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None of these files uses anything from the header.
Remove the inclusion.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260909-vdso-asm-generic-vsyscall-h-v1-13-63ae856cc659@linutronix.de
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Recent refactoring have made the header empty.
Remove it and its mentions.
Also that header was never a real asm-generic header anyways.
It had no reason to be in the asm-generic directory.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260909-vdso-asm-generic-vsyscall-h-v1-5-63ae856cc659@linutronix.de
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https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-dt into soc/dt
Minor improvements in arm DTS for v7.4
A few more or less trivial style cleanups pointed out by dt-check-style
for Actions, Aspeed and ARM vexpress platforms.
* tag 'dt-cleanup-7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-dt:
ARM: dts: aspeed: Replace spaces indentation with tabs
ARM: dts: vexpress-v2p-ca5s: Replace spaces indentation with tabs
ARM: dts: actions: owl-s500: Replace spaces indentation with tabs
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into soc/dt
Samsung DTS ARM changes for v7.4
1. Cleanup of clock-frequency property in favor of assigned-clock-rates.
2. Fix bandwidth of Bluetooth on Exynos4210-based boards.
* tag 'samsung-dt-7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
ARM: dts: samsung: exynos4210-*: Fix Bluetooth nodes
ARM: dts: samsung: exynos4412-midas: Replace clock-frequency in camera sensor node
ARM: dts: samsung: exynos4210-i9100: Replace clock-frequency in camera sensor node
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/frank.li/linux into soc/dt
i.MX arm64 dts updates for v7.4
New board support:
Add i.MX952 FRDM, i.MX93 Wireless FRDM, Toradex OSM iMX91, iMX93, iMX95,
Lino iMX91 and iMX93 (with dahlia), MR-NAVQ95, Free Mobile Nodebox v3 CPU
Module Data Modul i.MX8M Mini/Plus eDM SBC DT overlays (LVDS, HDMI, CM,
FIO1, FIO1-Audio, legacy board), ifm VHIP4 EvalBoard EEPROM layout DTOs
for i.MX8MN
MQS1 sound support:
- Add MQS1 pinmux, clocks and board muxes on i.MX91, i.MX93, i.MX94, i.MX95
EVKs and FRDM boards, i.MX952 AONMIX MQS device node.
- Add one MQS1 DT overlay shared for all i.MX9 platforms.
PCIe updates:
- Describe PCIe M.2 Key E connector on i.MX95-19x19-EVK and i.MX943-EVK
- Avoid 32-bit PCIe window System RAM overlap on i.MX95, i.MX94, i.MX943
- Move PCIe PERST# and vpcie supply to Root Port node on i.MX95-15x15-FRDM
Display/media:
- Add tianma,tm050rdh03 panel on i.MX91-9x9-QSB, Assign media_{axi,apb}_root
clock parents/rates on i.MX91, Override dpi_bridge compatible string on
i.MX91, Enable I2C_3_DSI1 on i.MX95 Aquila Clover board
Fixes and cleanup:
- Fix usbphynop2 power-domain and add #phy-cells
- Fix reserved memory node names across i.MX93, i.MX95, i.MX8QM, i.MX8QXP,
i.MX8DXL, i.MX8ULP EVKs
- Fix LVDS clock frequency for DL device on i.MX8MP Kontron
- Fix GPIO4_IO29 usage and USB-C connector mode on i.MX93 Kontron
- Fix gpio-line-names on i.MX95 Aquila, i.MX8MP/i.MX8MM Verdin/Toradex
- Fix duplicated can-phy node names on i.MX95-15x15-FRDM
- Fix RTC aliases on i.MX93-11x11-FRDM
- Fix reserved memory node names for remoteproc (multiple boards)
- Drop unsupported opp-hz-real in OPP tables on i.MX95
- Drop undocumented "hardware" root node properties
Other additions:
- Add HSIC usb@5b0e0000 node and usbotg3 iommu information
- Add Apalis i.MX8 USB HSIC support
- Add ENETC port 2 in SGMII mode on i.MX95 Aquila and Toradex SMARC
- Add thermal zones on i.MX95-TQMa9596SA
- Add boot phase properties on i.MX95-15x15-FRDM
- Add RTC1 alias for PCF2131 on i.MX91/i.MX93 EVK/QSB
- Add PEB-WLBT-07 expansion board for i.MX8MP phyBOARD-Pollux
- Add phyBOARD-Pollux PEB-AV-10 SAI master fix
- Add Wi-Fi SD interface on i.MX95 Toradex SMARC
- Add EEPROM nWP GPIO, label and layout on i.MX8MM/i.MX8MP
- Add TPM support and SAI3 sync RX mode on i.MX8MM VAR-DART
- Add SPI EERAM, GPIO labels, ethernet PHY LEDs on i.MX8MM Kontron
- Set #pinctrl-cells on lx2160a pinmux node
- ARM: vf610/vf500: describe L2 cache geometry and Cortex-A5 L1 caches
- i.MX93-11x11-FRDM: factor out common parts into dtsi
- i.MX8MQ-EVK: add regulator-off-in-suspend for VGEN1/VGEN6
- i.MX8MP: add DT label to SPBA5 bus
* tag 'imx-dt64-7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/frank.li/linux: (111 commits)
arm64: dts: imx95-tqma9596sa: Add thermal zones
arm64: dts: imx95-tqma9596sa-mb-smarc-2.dts: improve SD reset pulse
arm64: dts: freescale: Drop undocumented "hardware" root node properties
arm64: dts: freescale: imx8mm-verdin: add gpio-line-name for CTRL_SLEEP_MOCI#
arm64: dts: freescale: imx95-aquila: Enable I2C_3_DSI1 on Clover board
arm64: dts: lx2160a: set #pinctrl-cells on the pinmux node
arm64: dts: freescale: add MR-NAVQ95 basic board support
dt-bindings: arm: fsl: add MR-NAVQ95 board
arm64: dts: imx8mm-var-dart: increase PHY reset deassert delay
arm64: dts: imx8mm-var-dart: add TPM support
arm64: dts: imx8mm-var-dart: configure SAI3 synchronous RX mode
arm64: dts: imx8mn-solidsense-n8-compact: drop undocumented adi,led-polarity
arm64: dts: freescale: Add Toradex OSM iMX91
arm64: dts: freescale: Add Toradex OSM iMX93
arm64: dts: freescale: Add Lino iMX91
arm64: dts: freescale: imx93-lino: Add dahlia
arm64: dts: freescale: Add Lino iMX93
dt-bindings: arm: fsl: Add Toradex OSM iMX91/iMX93
dt-bindings: arm: fsl: Add Lino iMX91/iMX93
arm64: dts: imx95-15x15-frdm: fix reserved memory node names for remoteproc
...
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/frank.li/linux into soc/dt
i.MX ARM dt changes for 7.4:
- dt-bindings fixes and cleanups: allow single reg for fsl,imx6sx-ldb,
allow bridge@18 child in imx-iomuxc-gpr, allow display0 child for i.MX6UL
lcdif, add deprecated/optional properties for st,stmpe MFD.
- ARM dts cleanups: whitespace/indentation fixes, drop undocumented
st,stmpe properties, drop fallback "dlg,da9052" compatible, remove unused
CSI nodes, fix/remove unrecognized PCIe/wakeup properties
- ARM dts board updates:
- Add Variscite VAR-SOM-MX7, Colibri VF50/VF61, Amazon Kindle 4 (Yoshi)
board.
- imx7d Colibri eMMC: add Toradex Capacitive/Resistive 7" Parallel
displays and VGA overlay.
- imx7-colibri/imx6ull-colibri: set LCDIF bus width.
- imx7d: add Variscite VAR-SOM-MX7 and MX7CustomBoard support.
- imx7-tqma7: fix PMIC voltage constraints, sort I2C nodes by address.
- imx6ul-kontron-bl: add GPIO labels, fix USB OTG1 ID pin, replace UART3
with DIP switch GPIOs.
- imx6qdl-pico/wandboard: replace clock-frequency in camera sensor.
- mba6ulx: add Ethernet PHY interrupt and USB hub nodes.
- imx6dl-phytec-mira: add phyBOARD-Mira-i.MX6DL with eMMC.
- imx6qdl phycore-som: add custom volt/freq OPP table.
* tag 'imx-dt-7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/frank.li/linux: (46 commits)
ARM: dts: imx6dl-phytec-mira: Add phyBOARD-Mira-i.MX6DL with eMMC
ARM: dts: imx50: add support for Amazon Kindle 4 (Yoshi)
dt-bindings: arm: fsl: add Amazon Kindle 4 (Yoshi)
ARM: dts: imx6qdl: phycore-som: Add custom volt/freq table
ARM: dts: imx6dl: Add a label to cpu1 node
ARM: dts: imx7-colibri: Set LCDIF bus width
ARM: dts: imx6ull-colibri: Set LCDIF bus width
ARM: dts: imx: remove undocument properties of st,stmpe*
dt-bindings: mfd: st,stmpe: let interrupt property optional
dt-bindings: mfd: st,stmpe: add deprecated properties
ARM: dts: imx7-colibri-iris-v2: drop no-op delete-property
ARM: dts: imx6ul-kontron-bl-common: Fix USB OTG1 ID pin configuration
ARM: dts: imx6ul-kontron-bl-common: Add GPIO labels
ARM: dts: imx6ul-kontron-bl-common: Replace UART3 with DIP switch GPIOs
ARM: dts: imx53: drop fallback compatible "dlg,da9052"
ARM: dts: imx6ul-14x14-evk: remove reduntant bus-type under csi node
ARM: dts: imx6sll: remove unused node csi@20e8000
ARM: dts: imx6dl-b125v2: add touchscreen-size-x/y to exc80h60 node
ARM: dts: imx50-kobo-aura: convert sd2_vmmc to regulator-fixed
ARM: dts: imx7d-meerkat96: disable lcdif node
...
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32 into soc/dt
STM32 DT for v7.4, round 1
Highlights:
==========
- STM32MP13:
- Add DCMI / LTDC ETZPC access controler.
- Add SRAM nodes: SRAM1 16kB, SRAM2 8kB, SRAM3 8kB.
- Add SPI5 DMA chaining support.
- STMP32MP15:
- Use DMA FIFO for all SPIs.
- Add SPI4 DMA chaining support
- STM32MP25/23:
- Add SYSCFG driver to bind USB PHY.
- Add digital temperature sendore (Moortec).
- Add DCMI nodes.
- Enable eMMC on stm32mp257f-dk.
- Add I/O sync to eth1 rgmii pins to match with RGMII
specification.
- ENGICAM:
- Add Engicam MicroGEA-STM32MP257D-RMM board support
based on Engicam MicroGEA-STM32MP257 SoM (8GB eMMC Flash,
2 GB LPDDR4 DRAM). Embedding CAN, LEDS, LCD with touchscreen,
uSD, Audiocodec.
- DH:
- Add DH STM32MP23xx/STM32MP25xx DHCOS SoM and Breakout Board
and DHSBC support: This stm32mp25xx-dhcos-bb board is a stack
of DHCOS SoM based on STM32MP25xx SoC (1200MHz /
crypto capabilities) populated on SoM Breakout Board,
the stm32mp255c-dhcos-dhsbc is the SoM populated on DHSBC
carrier board. The stm32mp23xx-dhcos-bb is a stack with
STM32MP23xx SoC.
- The SoM contains the following peripherals:
- STPMIC (power delivery)
- 4GiB LPDDR4 memory
- eMMC and SDIO WiFi module
- The Breakout Board carrier board contains the following peripherals:
- USB-C peripheral port, power supply plug
- The DHSBC carrier board contains the following peripherals:
- Two RGMII Ethernet ports
- MicroSD slot
- LVDS connector
- MIPI CSI2 connector
- USB-A Host port, USB-C power supply plug
- USB-C / DP port
- Expansion connector
* tag 'stm32-dt-for-v7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32: (64 commits)
soc: st: Add STM32MP2 SYSCFG driver
dt-bindings: arm: stm32: Document st,stm32mp23/25-syscfg subnodes and cells
arm64: dts: st: fix sai3b unit address on stm32mp231
arm64: dts: st: fix sai3b unit address on stm32mp251
arm64: defconfig: enable Moortec MR75203 PVT controller
arm64: dts: st: add digital temperature sensor on stm32mp251
arm64: dts: st: add Engicam MicroGEA-STM32MP257D-RMM LVDS display overlay
arm64: dts: st: move Engicam MicroGEA-STM32MP257D-RMM display to an overlay
arm64: dts: st: enable eMMC on stm32mp257f-dk
arm64: dts: st: add sdmmc2 pins_b for stm32mp25
arm64: dts: st: add dcmi node on stm32mp23x
arm64: dts: st: add dcmi node on stm32mp25x
arm64: dts: st: add imx335/csi/dcmipp nodes on stm32mp235f-dk
arm64: dts: st: use video-interfaces media bus type in stm32mp257f-ev1
arm64: dts: st: ensure IMX335 is enabled on stm32mp257f-ev1
arm64: dts: st: add imx335/csi/dcmipp nodes on stm32mp257f-dk
MAINTAINERS: Add DH electronics DHCOS SoM entry and fix email address
arm64: dts: st: Add support for DH electronics STM32MP23xx/STM32MP25xx DHCOS SoM and Breakout Board and DHSBC
arm64: dts: st: Add pinmux nodes for DH electronics STM32MP23xx/STM32MP25xx DHCOS SoM and Breakout Board
arm64: dts: st: Add OMM node on stm32mp231
...
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Under some uncommon timing conditions, a generation check and
xchg(active_asids, A1) in check_and_switch_context() on P1 can race with
an ASID roll-over on P2. If P2 has not seen the update to
active_asids[P1], it can re-allocate A1 to a new task T2 on P2. P1 ends
up waiting on the spinlock since the xchg() returned 0 while P2 can go
through a second ASID roll-over with (T2,A1,G2) active on P2. This
roll-over copies active_asids[P1] == A1,G1 into reserved_asids[P1] and
active_asids[P2] == A1,G2 into reserved_asids[P2]. A subsequent
scheduling of T1 on P1 and T2 on P2 would match reserved_asids and get
their generation bumped to G3:
P1 P2
-- --
TTBR0.BADDR = T0
TTBR0.ASID = A0
asid_generation = G1
check_and_switch_context(T1,A1,G1)
generation match
check_and_switch_context(T2,A0,G0)
new_context()
ASID roll-over
asid_generation = G2
flush_context()
active_asids[P1] = 0
asid_map[A1] = 0
reserved_asids[P1] = A0,G0
xchg(active_asids, A1)
active_asids[P1] = A1,G1
xchg returns 0
spin_lock_irqsave()
allocated ASID (T2,A1,G2)
asid_map[A1] = 1
active_asids[P2] = A1,G2
...
check_and_switch_context(T3,A0,G0)
new_context()
ASID roll-over
asid_generation = G3
flush_context()
active_asids[P1] = 0
asid_map[A1] = 1
reserved_asids[P1] = A1,G1
reserved_asids[P2] = A1,G2
allocated ASID (T3,A2,G3)
asid_map[A2] = 1
active_asids[P2] = A2,G3
new_context()
check_update_reserved_asid(A1,G1)
matches reserved_asid[P1]
reserved_asid[P1] = A1,G3
updated T1 ASID to (T1,A1,G3)
check_and_switch_context(T2,A1,G2)
new_context()
check_update_reserved_asid(A1,G2)
matches reserved_asids[P2]
reserved_asids[P2] = A1,G3
updated T2 ASID to (T2,A1,G3)
At this point, we have two tasks, T1 and T2 both using ASID A1 with the
latest generation G3. Any of them is allowed to be scheduled on the
other CPU leading to two different tasks with the same ASID on the same
CPU.
This patch changes the xchg to cmpxchg so that the active_asids is only
updated if non-zero to avoid a race with an ASID roll-over on a
different CPU.
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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show_stack() can be called for any task, but c_backtrace is always
unwinding frames based on "sp" register.
Which leads to printing backtrace of current task instead of
required task.
Try with normal TC:
==================
for_each_process(p){
sched_show_task(p);
}
[7.433271] task:kthreadd state:S stack:0 pid:2 tgid:2 ppid:0 task_flags:0x208040 flags:0x00000000
[7.433633] Call trace:
[7.433640] [<80113418>] (dump_backtrace) from [<80113510>] (show_stack+0x14/0x18)
..
[7.433676] [<8016749c>] (sched_show_task) from [<803cb324>] (meminfo_proc_show+0x6c/0x930)
[7.434019] r5:8158e300 r4:8b4882d0
[7.434024] [<803cb324>] (meminfo_proc_show) from [<80365788>] (seq_read_iter+0x148/0x4bc)
[7.434045] [<80365788>] (seq_read_iter) from [<803c044c>] (proc_reg_read_iter+0xb8/0xc4)
[7.434060] [<803c044c>] (proc_reg_read_iter) from [<80377104>] (copy_splice_read+0x228/0x308)
It should unwind frame based on passed "fp".
(CONFIG_UNWINDER_FRAME_POINTER=y)
Extra sp manipulation is needed only when c_backtrace()
is called from dump_backtrace() with "frame == fp" i.e.
NULL regs and not current task. (Suggested by Ard Biesheuvel)
Otherwise passed "fp" should be used to unwind backtraces.
With fix:
=========
[13.933732] task:kthreadd state:S stack:0 pid:2 tgid:2 ppid:0 task_flags:0x208040 flags:0x00000000
[13.934165] Call trace:
[13.934604] [<80afa1a8>] (schedule) from [<8015426c>] (kthreadd+0x124/0x208)
[13.934654] r10:8100bbf0 r4:8116f440
[13.934664] [<8015426c>] (kthreadd) from [<8010010c>] (ret_from_fork+0x14/0x28)
[13.934691] Exception stack(0xf081df9c to 0xf081dfe4)
Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Onkarnath <onkarnath.1@samsung.com>
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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In BE32 configurations, endianess is always set to BE in Control
Register C1, originally to allow booting BE kernels from a LE bootloader
on IXP12xx.
To also allow the opposite and allow booting LE kernels from a BE
IXP4xx bootloader, moving this code into head-xscale.S along with the
recommended serialization sequence and flip the B bit into the correct
position regardless of its original state.
Note that both the endianess switch sequence and the cp15wait I add
here should be harmless on all supported ARMv4/v4t/v5 CPUs, but the
existing cache flush code is not actually defined on ARM720 and may
cause problems in multiplatform kernels that include both Xscale
and CLPS711x.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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mmap(MAP_HUGETLB) on 32-bit Arm can return an address which is not
aligned to the huge page size. In a QEMU virt guest, unmapping the VMA
then hits the alignment check in __unmap_hugepage_range():
kernel BUG at mm/hugetlb.c:5213!
Internal error: Oops - BUG: 0 [#1] SMP ARM
PC is at __unmap_hugepage_range+0x540/0x584
LR is at __zap_vma_range+0x13a0/0x1410
Commit 7bd3f1e1a9ae ("mm: make hugetlb mappings go through
mm_get_unmapped_area_vmflags") made hugetlb mappings use the
architecture's arch_get_unmapped_area(). The generic implementations
handle hugetlb alignment, but the Arm implementations only account for
the optional SHMLBA cache-colouring constraint. A 4 KiB-page kernel can
therefore align the mapping to 4 KiB or 16 KiB instead of the required
2 MiB.
Set the alignment mask from the file's hstate for hugetlb mappings in
both Arm implementations. Huge-page alignment also satisfies the
SHMLBA constraint.
Assisted-by: LLM
Fixes: 7bd3f1e1a9ae ("mm: make hugetlb mappings go through mm_get_unmapped_area_vmflags")
Cc: stable@vger.kernel.org
Acked-by: Muchun Song <muchun.song@linux.dev>
Link: https://lore.kernel.org/r/20260901085740.66283-1-kmehltretter@gmail.com/
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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ARM secondary CPUs allocate cacheinfo in detect_cache_attributes(),
called from secondary_start_kernel() with interrupts disabled. With
PREEMPT_RT, the allocation takes a sleeping lock and triggers
"BUG: sleeping function called from invalid context".
Call fetch_cache_info() for each possible CPU from init_cpu_topology()
on the boot CPU, following commit 5944ce092b97 ("arch_topology: Build
cacheinfo from primary CPU"). This supplies the arrays before secondary
CPUs populate them. Suppress -ENOENT and -EOPNOTSUPP, which leave cache
detection to the existing late path.
The CLIDR fallback uses the boot CPU's cache geometry. A secondary CPU
with more cache leaves can still require late reallocation and trigger
the warning.
Assisted-by: LLM
Fixes: a9ff94477836 ("ARM: 9433/2: implement cacheinfo support")
Cc: stable@vger.kernel.org
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20260912195552.76673-5-kmehltretter@gmail.com/
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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ARM1176 and ARM11 MPCore can be reported as ARMv7 by
cpu_architecture() even though they lack CLIDR. populate_cache_leaves()
therefore needs the CTR-format check used by detect_cache_level().
DT-based early allocation bypasses init_cache_level(), so its check
no longer protects populate_cache_leaves(). A combined ARMv6/ARMv7
SMP kernel can reach this path on BCM2835, whose DT describes its
caches.
Share the CLIDR capability check between detection and population.
Return -ENOENT from population when CLIDR is unavailable, preserving
the existing absence of cacheinfo and avoiding a new topology warning.
Assisted-by: LLM
Cc: stable@vger.kernel.org
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20260912195552.76673-4-kmehltretter@gmail.com/
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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early_cache_level() counts only caches described by CLIDR. An external
PL310 is absent from CLIDR, and its arm,pl310-cache compatible is not
accepted by init_of_cache_level(), so early allocation falls back to
an incomplete count. init_cache_level() later adds the DT-described
L2, forcing reallocation on the secondary CPU with interrupts disabled.
This defeats early allocation on PREEMPT_RT.
Use init_cache_level() for early sizing too, so the initial allocation
includes external caches described by the device tree.
Assisted-by: LLM
Cc: stable@vger.kernel.org
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20260912195552.76673-3-kmehltretter@gmail.com/
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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populate_cache_leaves() advances its bounds-checking index once per
cache level, but split instruction/data caches consume two entries.
CLIDR-based allocation supplies enough entries. Early allocation from
the device tree can supply fewer and expose an out-of-bounds write.
Count each written leaf and stop before a split level that does not
fit. This prepares ARM for DT-based early allocation and matches
commit 875d742cf532 ("arm64: cacheinfo: Avoid out-of-bounds write to
cacheinfo array").
Assisted-by: LLM
Fixes: a9ff94477836 ("ARM: 9433/2: implement cacheinfo support")
Cc: stable@vger.kernel.org
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20260912195552.76673-2-kmehltretter@gmail.com/
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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error path
In __iommu_alloc_simple(), when IOMMU mapping creation fails, the error
path unconditionally called __free_from_pool() regardless of the
allocation path taken.
For the COHERENT case, memory is allocated via __alloc_simple_buffer(),
which does not use the atomic pool. Calling __free_from_pool() on such
memory silently returns without freeing, causing a page memory leak.
Fix this by matching the free function to the allocation path:
- COHERENT: use __dma_free_buffer(virt_to_page(addr), size)
- non-COHERENT: use __free_from_pool(addr, size)
Fixes: 565068221b905 ("ARM: 8561/4: dma-mapping: Fix the coherent case when iommu is used")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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The register-offset form of LDR/STR may apply a shift to Rm. Per
DecodeImmShift() (ARM ARM DDI0406C section A8.4.3, "Pseudocode details
of instruction-specified shifts and rotates"), an imm5 of 0 encodes a
shift of 32 for LSR and ASR; only LSL treats 0 as "no shift", and ROR
with 0 encodes RRX.
do_alignment() special-cases RRX but not LSR or ASR, and IS_SHIFT() does
not filter these encodings out, so the block is entered with
shiftval == 0 and the offset becomes Rm instead of 0 (LSR #32) or the
replicated sign of Rm (ASR #32).
do_alignment_finish_ldst() applies the offset to the base-register
writeback of the post-indexed form, so the emulated access itself uses
the correct faulting address but Rn is left holding the wrong value.
Reproduced on ARM926EJ-S (versatile_defconfig, CONFIG_ALIGNMENT_TRAP=y,
gcc 13.3.0) with a misaligned base and Rm = 0x1000:
ldr r0, [r1], r2, lsr #32 Rn advanced by 0x1000, must be unchanged
ldr r0, [r1], r2, asr #32 Rn advanced by 0x1000, must be unchanged
ldr r0, [r1], r2, asr #32 with Rm negative, Rn must decrease by 1
All three are correct with the patch applied, while a lsr #1 control
case is emulated correctly both before and after.
Assisted-by: Claude:claude-fable-5
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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The alignment handlers enable access to user memory while emulating
unaligned instructions. If a checked access faults, its exception table
fixup jumps to the handler's fault label and bypasses uaccess_restore().
This leaves DOMAIN_USER as DOMAIN_CLIENT with SW domain PAN, or leaves
TTBR0 page table walks enabled with TTBR0 PAN, while the fault is handled.
An ARM926 QEMU test using LDMIA across an unmapped page boundary reports
DOMAIN_USER=1 at TYPE_FAULT before this change and DOMAIN_USER=0 after it.
SW domain PAN is the default on ARMv5, ARMv6, and non-LPAE ARMv7 builds.
Keep the saved uaccess state at function scope and track whether it was
saved. Restore it at the fault label only when needed. Paths that did not
enable user access continue to skip the restore.
Assisted-by: Codex:gpt-5.6-sol
Fixes: 274e91b81ed2 ("ARM: alignment: fix alignment handling for uaccess changes")
Cc: stable@vger.kernel.org
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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With CONFIG_KCOV_INSTRUMENT_ALL=y, secondary CPUs fail to come online
on ARMv6K/ARMv7 SMP:
CPU1: failed to boot: -38
The compiler inserts a call to __sanitizer_cov_trace_pc() at the entry
of secondary_start_kernel(), before set_current(task). The KCOV hook
dereferences current while TPIDRURO is still uninitialized, causing a
data abort before cpu_init() has installed the exception stacks. The
secondary CPU consequently never completes startup.
Initialize current in the secondary assembly handoff, as
__mmap_switched already does for the boot CPU.
With current set in assembly, the set_current() call in
secondary_start_kernel() is redundant. Drop it together with the
function and the task argument. The hotplug resuscitate path in
arch_cpu_idle_dead() needs no hand-off either, as smp_ops.cpu_die()
can only return if the CPU kept its register state, TPIDRURO included.
Assisted-by: Claude:claude-fable-5
Fixes: 50596b7559bf ("ARM: smp: Store current pointer in TPIDRURO register if available")
Cc: stable@vger.kernel.org
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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An ARM randconfig with CONFIG_GET_FREE_REGION=y and CONFIG_WERROR=y
fails to build:
include/linux/minmax.h:86:37: error: conversion from 'long long
unsigned int' to 'resource_size_t' {aka 'unsigned int'} changes
value from '68719476735' to '4294967295' [-Werror=overflow]
Commit 14b80582c43e ("resource: Introduce alloc_free_mem_region()")
made kernel/resource.c clamp against
(1ULL << MAX_PHYSMEM_BITS) - 1. resource_size_t is 32-bit without
LPAE, but ARM's default MAX_PHYSMEM_BITS is 36.
That default was added by commit db57f88e4ccb ("ARM: 8411/1: Add
default SPARSEMEM settings") because several platforms needed at
least 36 physical address bits. !LPAE could map addresses above
32 bits only through supersections.
CONFIG_IO_36, added by commit 23bdf86aa06e ("[ARM] 3377/2: add
support for intel xsc3 core"), enabled these for XSC3 I/O. IXP23xx
placed static I/O mappings above 4GiB until its removal in 2012, and
IOP13xx ioremap()ed its PCIe windows there until its removal in 2019.
The only remaining XSC3 platform, PXA3xx, has nothing above 4GiB.
Supersection address bits overlap the descriptor domain field, so
IO_36 also renumbered the domains to make DOMAIN_IO zero. Remove
IO_36, the alternate domain numbering, and ioremap()'s supersection
path. Reject !LPAE ioremap ranges extending past 4GiB before
phys_addr_t truncation, drop the now-unneeded high static-mapping
exclusion, and reduce ioremap alignment from 16MiB to the 2MiB
covered by a PMD's pair of sections.
The other supersection user, create_36bit_mapping(), was added by
commit 0b7cd62ecdc1 ("[ARM] 3017/1: Add support for 36-bit addresses
to create_mapping()") for IXP2350 and carried IXP23xx's high static
mappings. Before this change, its only remaining call path was
efi_create_mapping() -> create_mapping_late(), for an EFI runtime
region above 4GiB.
No real-world user of this !LPAE path is known. AArch32 UEFI
requires RAM described by its memory map to be identity-mapped
during boot services, which a 32-bit virtual address space cannot
provide above 4GiB. Systems needing wider physical addressing are
expected to use LPAE.
Remove create_36bit_mapping() and the supersection definitions. If
firmware nevertheless advertises such a region on !LPAE,
efi_create_mapping() rejects it before __pfn_to_phys() truncates its
address to a low alias. EFI runtime services remain disabled, but
the kernel continues to boot. LPAE kernels are unaffected.
With no remaining !LPAE mappings above 4GiB, set MAX_PHYSMEM_BITS to
32 for !LPAE and retain 36 for LPAE, where phys_addr_t is 64-bit.
Assisted-by: Claude:claude-fable-5
Link: https://lore.kernel.org/all/3c79d2dc-8fbd-40fc-8b2d-9d1b4f8ed34e@app.fastmail.com/
Link: https://lore.kernel.org/all/CAK8P3a2MCdUbN0QSb+M3g5_6HjPsaQwtKxFjADMZWomdry4-Ww@mail.gmail.com/
Fixes: 14b80582c43e ("resource: Introduce alloc_free_mem_region()")
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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