summaryrefslogtreecommitdiff
path: root/drivers/accel/amdxdna
AgeCommit message (Collapse)Author
6 daysaccel/amdxdna: refuse to flush an imported BOTaimuraz Kaitmazov
SYNC_BO clflushes an imported BO's scatterlist. An importer may not do that: the memory belongs to the exporter, and dma-buf gives the importer no interface to ask for maintenance on it. Refuse the request instead. is_import_bo() is (obj)->attach, which covers more than foreign buffers. A userptr BO arrives through a ubuf, and on a carveout device every share BO and the device heap arrive through a cbuf, so SYNC_BO answers -EOPNOTSUPP for those too, including the AMDXDNA_BO_DEV path that flushes through its heap. Only the ubuf case gives up maintenance it was getting: on a 64 MiB userptr BO a 4 KiB sync and a full sync both cost 659 us, this arm having ignored the range. amdxdna_cbuf_map() fills in only the DMA address and length, so drm_clflush_sg() already walks zero pages on carveout memory. Userspace maintains these through the mapping it already holds, as XRT's buffer::sync() does unless it is told to sync through the driver. Fixes: dbc8fd7a03cb ("accel/amdxdna: Add expandable device heap support") Reported-by: Christian König <christian.koenig@amd.com> Link: https://lore.kernel.org/dri-devel/a505f9e5-b416-43e9-934d-c5c29b8a70e9@amd.com/ Suggested-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Taimuraz Kaitmazov <taimuraz@kaitmazov.com> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260819224458.257346-5-taimuraz@kaitmazov.com
7 daysMerge drm/drm-fixes into drm-misc-fixesMaxime Ripard
Let's start the 7.3 drm-misc-fixes cycle. Signed-off-by: Maxime Ripard <mripard@kernel.org>
2026-08-24accel/amdxdna: put the chained BO when its mapping failsTaimuraz Kaitmazov
amdxdna_cmd_set_error() looks up the first BO of a command chain, which takes a reference, and drops it at the end of the function. The mapping of that BO is established in between, and the failure path returns without the put, so the reference is leaked. Ordinary use does not reach it. The chain has been submitted before any of this runs, so aie2_cmdlist_fill_slot() has already called amdxdna_cmd_get_op() on that BO and amdxdna_gem_vmap() has cached its address. What makes it reachable is that the BO is resolved again by handle here, and the handle is userspace's to recycle: closing it after submission and importing a dma-buf whose exporter implements no vmap onto the same id leaves amdxdna_gem_get_obj() returning an object this cannot map, since prime_import() types every import AMDXDNA_BO_SHARE. Fixes: d76856beb4a4 ("accel/amdxdna: Refactor GEM BO handling and add helper APIs for address retrieval") Signed-off-by: Taimuraz Kaitmazov <taimuraz@kaitmazov.com> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260819230852.287751-1-taimuraz@kaitmazov.com
2026-08-24accel/amdxdna: reject a command chain that carries no commandsTaimuraz Kaitmazov
A chain whose command_count is zero passes the payload length check, because struct_size(payload, data, 0) is just the header. The fill loop then does not run, so offset stays zero and the request is submitted with a zero-length buffer. On firmware without AIE2_NPU_COMMAND that ends at the opcode check, since op is still ERT_INVALID_CMD and aie2_get_chain_msg_op() answers MSG_OP_MAX_OPCODE. aie2_get_npu_chain_msg_op() answers MSG_OP_CHAIN_EXEC_NPU whatever it is given, so there the submission continues to drm_clflush_virt_range(cmd_buf, 0), which reads the byte before the buffer and faults on the vmap guard page. EXEC_CMD is reachable by any process that can open the render node. Reject the request instead. Fixes: 8ed8b0239617 ("accel/amdxdna: Add debug prints for command submission") Signed-off-by: Taimuraz Kaitmazov <taimuraz@kaitmazov.com> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260818000019.369366-1-taimuraz@kaitmazov.com
2026-08-24accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chainLizhi Hou
struct amdxdna_cmd_chain contains a flexible array annotated with __counted_by(command_count). Since the structure is stored in shared AMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently. If command_count is changed to zero, the bounds check generated from __counted_by may fail and trigger a kernel panic. Remove __counted_by to avoid relying on the userspace-controlled command_count for the flexible array bounds check. Fixes: aac243092b70 ("accel/amdxdna: Add command execution") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260821033543.1839719-1-lizhi.hou@amd.com
2026-08-21Merge tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernelLinus Torvalds
Pull drm updates from Dave Airlie: "Highlights: - dmemcg eviction support is good for low VRAM things like Steam Machine - AMD adds gfx6-8 modifier support for older GPUs that enables a bunch of wayland stuff - i915/xe has some new hw support but also a lot of display refactoring Everything: perf: - export perf_allow_ APIs for xe udmabuf: - remove default size limit of 64MB rust: - i/o rework (signed tag from driver-core tree) - add registration guard and registration data - fix unbounded lifetimes in ioctl handler args - fix a drm_dev_register race - gem_shmem: add DmaResvGuard helper - gpuvm: require send/sync for driver data - implement send/sync for GpuVaAlloc and GpuVmBo - add SmContext lifetime - rename dma_handle to dma_address - change pci_sriov_get_totalvfs return to unsigned int core: - create drm_of_get_panel_orientation - send per-connector hotplug events - add thunderbolt UBHR tunneling support connector: - add color format property dmem: - introduce a peak file - accept one region per limit - add dmemcg support for eviction gpusvm: - reorg code to give drivers more flexibility atomic: - add create_state callback and helper - add documentation on atomic commit lifetime buddy: - add per-order free - add used block scoreboard - fix UAF - test buffer clearance on resume - add phys_addr->block helper gem: - drop DRIVER_GEM_GPUVA flag ttm: - be more aggressive allocating below protection limit sched: - add test suite for concurrent job submissions hdmi: - hook the color format property in helpers mipi-dsi: - add MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT bridge: - add atomic create callbacks - drop atomic reset - display-connector: don't autoenable HPD IRQ - trigger initial HPD for DP - ti-sn65dsi83: remove NO_HFP and NO_HBP mode flags - analogix_dp: switch to DP link training helpers dp: - add support for DSC max delta BPP edid: - parse panel type from DisplayID 2.x Display Parameters sysfb: - improve panel, stride, framebuffer size validation panel: - implement ref counting for struct drm_panel - himax-hx83121a: add backlight regulator support - novatek-nt36672a: Inline panel init sequences - visionox-vtdr6130: enable DSC - novatek-nt37801: Use mipi_dsi_*_multi() functions - samsung-s6d16d0: Fix prepare error handling - support Novatek NT36536 plus DT bindings - sofef00: fix backlight updates - osd101t2587: use mipi_dsi_*_multi interface - panel-edp: adjust timing for AUO displays - panel-lvds: support Opto Logic SCX1001511GGC49 - panel-simple: support Kyocera tcg070wvlq - panel-edp: quirks - AUO B116XAT04.3, CMN N116BCP-EA2, CSW MNB601LS1-8 - BOE NV116WH2-M30, BOE NT116WHM-N21, BOE NV116FH1-M31 - BOE NV116FH1-M30, NV140FHM-N5B, TM156VDXP25 - BOE NE160QDM-NY1, MB116AS01 - new: - Samsung ATNA40HQ08-0, Anbernic TD4310 - Chipone ICNA35XX, Ilitek ILI9488 - Ilitek ILI7807S, Renesas R63419 - MNE001BS6-2, MNF601BS4-1, Sharp LQ120P1JX51 virtio: - add support for save/restore virtio_gpu_objects - abort vq wait on device removal amdgpu: - add color format DRM property - initial compute pipe reset support - add GFX 6-8 modifier support - initial DCN 6.0.0 support - dmemcg eviction support - improved boundary checking for bios parsing - RAS updates and rework - VCN secure submission fixes - 8K panel fix - Display KUNIT tests - parse panel type from DisplayID - Align IP discovery to pci device lifetime - SOC15 register macro cleanups - UVD memory placement fixes - GFX9 mode2 reset fixes - drop unnecessary BUG/BUG_ON - GFX8 soft reset rework - enable soft reset on GFX8 - PSP/SMU 15.0.9 update - VI ASPM fix - userq fixes - amdgpu_vm_get_task_info_pasid lifetime fix - DC CACP support - change system_unbound_wq with system_dfl_wq - Loosen VFCT bios parsing to deal with pci=realloc - SI/SMU7 AC/DC switch fix - VM fence handling fix - GEM close optimisation - Apple Studio Display fixes - DC FRL fixes amdkfd: - initial compute pipe reset support - allow applications to opt out of sigbus on fatal errors - improve CRIU boundary checks - MQD handling rework - move TBA/TMA from system to device memory - avoid topology-lock in kfd_mmap - SVM eviction fixes radeon: - fix unset CONFIG_ACPI build i915: - Novalake (NVL display version 35) timing generator enabling - NVL DC3CO enabling - enable UBHR link rates on thunderbolt tunnels - Reduce Xe3+ PM demand peak bandwidth - enable pipe DMC error interrupts for display 30+ - add kunit tests for DP link config selection - refactor and document DP link recovery - i915/xe driver display probe/remove/suspend/resume/shutdown cleanup and unification - i915/xe display runtime PM unified - Break i915 and xe panic dependency on struct intel_framebuffer - Streamline Pre/Post-CSC LUT loops - drop TGL DC3DO support - CDCLK santization - fix HDMI scrambling enable - fix phys bo pread/pwrite with offset - add missing nospec on parallel submit slot - fix some NULL derefs xe: - drop force_execlist module param - gate observation streams with perf_allow_cpu - skip FORCE_WC and vm_bound check for external dma-bufs - dmemcg eviction support - remove unused NVL-S GuC - TLB invalidation improvements - NVL-S updated PCI-IDs and w/a - madvise: optimise invalidation path - fix infinite gt-reset loop in timeout recovery - update TTM device benefical_order - wait on external BO kernel fences in exec ioctl - add/use more KLV helpers - sriov: disable display in admin only PF mode - add RAS GPU health indicator - optimise TTM populate for DONTNEED BO - drop force_probe for NVL-s - add debugfs for pcode info amdxdna: - disable device buffer export nova: - build nova-core/nova-drm from drivers/gpu - export nova-core rust symbols (workaround) - GSP boot process consolidation - Boot GSP with vGPU enabled - TLV firmware image format support - Hopper/Blackwell fixes and cleanups - I/O projection adoption tyr: - firmware loading and MCU boot - add generic slot manager + MMU - GPU VM support ARM64 LPAE page tables - add kernel buffer object for internal allocations - add parser for Mali CSF - add MCU booting nouveau: - race fixes - check instmem iomapping at first use - add dmemcg support - expose NVDEC channels - add scanline position/head state support for GSP qxl: - convert simple encoder to regular ethosu: - add perf counter support etnaviv: - force flush on power register ops msm: - support DSC configuration with slice_per_pkt > 1 mxsfb: - fix disable sequence panthor: - support sparse mappings rockchip: - switch away from simple helpers - support YUV background color - fix layer config timeout - add edp support for rk3576 - add batch command submission function rocket: - error handling and NULL ptr deref fixes sun4i: - switch away from simple helpers imagination: - mark BXM-4-64 MC1 as support host1x: - support tegra264 tegra: - add DSI for tegra 20/30 v3d: - reduce PM runtime autosuspend delay - scheduler fixes and refactoring - deprecate v3d 3.3 and 4.1 - validate CPU job query boundaries hibmc: - improve plane format handling - switch to gem shmem mediatek: - cec: correct compat for mt7623-8167? exynos: - remove simple dependency - add error handling to encoder paths - take i2c adapter module reference" * tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernel: (2074 commits) drm/xe/mcr: Take vcs1/vecs1 into account for first media slice drm/xe: Fix a bug in pc_adjust_freq_bounds() drm/xe: Fix xe_device_probe() failure drm/xe/drm_ras: Move has_drm_ras check to drm_ras layer drm/xe/ras: Fix boot-time ras error processing drm/amd/display: make DC_RUN_WITH_PREEMPTION_ENABLED misuse a build error drm/amd/pm: silence uninitialized variable warnings drm/amdgpu: skip BOs being torn down during GTT recovery drm/amdgpu: Reject UVD message with invalid number of h265 refs drm/amdgpu: keep PRT mappings off the vm_bo state lists drm/amdgpu: fix nbif 6.3.1 l1 low power not functional drm/amd/display: fix BT.2020 YCbCr output CSC matrices for DCE drm/amd/display: fix BT.2020 YCbCr limited output CSC matrix drm/amdgpu: Implement insert_end for VCE 3 drm/amdgpu: Fix UVD min buffer sizes drm/amdgpu: Fix UVD decode image min size calculation drm/amdgpu: Fix UVD dpb min size calculation for H264 drm/amdgpu: Reject UVD message with dimensions above 4096 drm/amdgpu: check ASPM on the dGPU host link drm/radeon: fix autosuspend cleanup during teardown ...
2026-08-20Merge tag 'mm-stable-2026-08-18-18-39' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - "mm: drop "sub" prefix from various places" (Dev Jain) page->folio conversion and a naming cleanup - "mm/kasan: remove redundant initialization for kasan_flag_write_only" (Igor Putko) KASAN cleanup work - "mm/filemap: reduce unnecessary xarray lookups" (Chi Zhiling) Small speedup in the pagecaache read code - "mm/percpu: Fix possible NOFS/NOIO reclaim recursion" (Kaitao Cheng) Improve the vmalloc code - mainly the avoidance of GFP_KERNEL allocations when the caller asked for GFP_NOFS or GFP_NOIO - "mm/kmemleak: avoid soft lockup when scanning task stacks" (Breno Leitao) Avoid a soft lockup watchdog trigger from the kmemleak scanning code in extreme situations - "mm/page_owner: misc cleanups" (Ye Liu) Cleanups to the page_owner code. For some reason lots of people have been working on the page_owner code this cycle. - "mm: convert to walk_page_range_vma() to eliminate find_vma()" (Kefeng Wang) Simplify and accelerate the page walking library function - "mm/migrate: preparatory cleanups for batch copy and offload" (Shivank Garg) Cleanups in the migration code - "mm/page_owner: add per-fd filter infrastructure for print_mode and NUMA filtering" (Zhen Ni) Per-fd filtering to page_owner in order to reduce the sometimes vast amount of output it can produce - "mm: Refactor bootmem gigantic hugepage allocation" (Muchun Song) Fixes and preparatory cleanups around bootmem HugeTLB handling, sparse initialization ordering, and related vmemmap setup - "mm/zsmalloc: reduce lock contention in zs_free()" (Wenchao Hao) Reduce lock contention in zs_free(), which dominates the unmap path under memory pressure on Android (LMK kills) and on x86 servers running zswap-heavy workloads. Up to 1.83x improvement in microbenchmarking. - "move alloc_tag.c file under mm/" (Suren Baghdasaryan) - "samples/damon: handle damon_{start,stop}() failures" (SJ Park) Fix improper handling of damon_start(), damon_stop(), and damon_call() failures across DAMON sample modules to prevent potential memory leaks, operation disruptions and use-after-free bugs - "mm/damon/sysfs: kobject_del() directories that users can create/remove" (SJ Park) Fix delayed sysfs directory removal under DEBUG_KOBJECT_RELEASE causeing creation failures due to duplicate directory names by adding missing kobject_del() calls before creating new directories - "mm: cleanup clear_not_present_full_ptes()" (David Hildenbrand) Clean up the core pte handling code - "selftests/damon: misc fixes for test bugs" (Kunwu Chan) Fix several bugs in the DAMON selftests - "selftests/damon: fix memcg_path staging handling" (Cheng Nie) Fix a bug in _damon_sysfs.py for damos_filter memcg_path setup, and add a test case for it in sysfs.py. - "selftests/damon: test kdamond refresh_ms" (Ruslan Valiyev) Selftest coverage for DAMON's refresh_ms sysfs feature by updating the test control module and verifying that scheme stats update automatically without manual intervention - "mm/damon: five misc fixups" (Akinobu Mita) Miscellaneous DAMON fixups. - "mm/damon/core: detect internal variation above max_nr_regions/2" (Jiayuan Chen) Fix DAMON's region splitting behavior when region counts exceed half the maximum budget by dynamically scaling down the split fraction as the limit approaches, preventing large regions from staying un-split, and add corresponding KUnit test coverage - "mm: preparatory patches for PMD level swap entries" (Usama Arif) Refactor and clean up PMD softleaf helpers, call sites, and architecture flags to lay the groundwork for a follow-up series that introduces PMD page table swap entries - "mm/damon: update, optimize, and clean up doc, tests, and code" (SJ Park) Update DAMON design and ABI documentation, expands unit and selftest coverage, optimize damon_commit_target_regions(), and clean up recently added sysfs interface code for better readability - "mm/vmpressure: reduce CPU, memory and code overhead on cgroup v2" (Usama Arif) Optimize vmpressure() by skipping unnecessary work on cgroup v2 for userspace event notifications and refactor v1-only eventfd handling into mm/memcontrol-v1.c to reduce memory overhead and code complexity - "selftests/mm: refactor pkey helpers and fix mmap error handling" (Hongfu Li) Refactor pkeys shared tracing and assertion helpers into a common file, unify protection key selftests to use consistent diagnostic logging and assertions, and enforce standardized MAP_FAILED return checks for mmap() calls across the tests - "mm/damon: optimize out nr_accesses_bp" (SJ Park) Replace the error-prone, continuously updated nr_accesses_bp field in damon_region with an on-demand moving sum function, reducing structure memory overhead and avoiding state corruption bugs - "Open HugeTLB allocation routine for more generic use" (Ackerley Tng) Decouple HugeTLB folio allocation from VMA dependencies by introducing hugetlb_alloc_folio(), enabling subsystems like guest_memfd to allocate HugeTLB folios without standard VMA reservations or pseudo-VMAs - "mm/damon: provide pseudo moving sum probe_hits" (SJ Park) Integrate DAMON's probe_hits attribute counter into the pseudo moving sum infrastructure, enabling real-time, online monitoring without waiting for full aggregation intervals - "mm: Some cleanups for page allocator APIs" (Brendan Jackman) Simplify and refactor the page allocator entry points and flags by unifying allocation paths, adding internal alloc_flags arguments, and eliminating redundant __ prefixed alloc_pages variants. - "Fix incorrect access of hugetlb pte entries" (Dev Jain) Enforce the consistent use of huge_ptep_get() instead of ptep_get() for HugeTLB entries and fixes an unaligned address issue in arm64's huge_ptep_get() implementation - "mm/damon: validate all parameters in the core" (SJ Park) Consolidate parameter validation into the DAMON core specifically within damon_start() and damon_commit_ctx() to centralize error checking, eliminate caller-side redundant checks and to improve maintenance efficiency - "tools/mm/page_owner_sort: fix filtering and cleanup issues" (Yichong Chen) Rename is_need() to filter_record() for clearer return semantics, fix per-record allocation memory leaks and bound output copies in search_pattern() to address an existing buffer issue - "memcg: bail out reclaim when memcg is dying" (Jiayuan Chen) Mitigate a system-wide stall which occurs when a cgroup is removed while one of its memory control files is doing synchronous reclaim - "mm/memory-failure: add panic option for unrecoverable pages" (Breno Leitao) Introduce an opt-in vm.panic_on_unrecoverable_memory_failure sysctl that immediately panics the kernel on unrecoverable memory errors in kernel-owned pages to preserve error context and prevent delayed, silent data corruption - "mm/damon: refactor damon_{start,stop,commit}() for simple error handling" (SJ Park) Refactor the DAMON core API functions to guarantee that all contexts are fully stopped when damon_start(), damon_stop(), or damon_commit() fail, eliminating the need for complex and error-prone caller-side cleanup code - "Keep tail page private zero at free and folio split" (Zi Yan) Add checks to ensure tail_page->private is zero when freeing compound or high-order pages and when promoting tail pages during large folio splits. By validating these fields at free and split time, it allows the removal of redundant private field clearing inside prep_compound_tail() - "mm: drop redundant lru_add_drain in anon folio reuse paths" (Barry Song) Eliminate redundant lru_add_drain() calls in wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock contention and system overhead By validating folio refcounts against the LRU cache before draining and removing unnecessary drains in the swap path, it achieves up to a 30.5% reduction in drain calls during heavy swap workloads - "mm: clean up folio LRU and swap declarations" (Jianyue Wu) Reorganize folio LRU and swap code by relocating page-cluster state to mm/swap_state.c, renaming mm/swap.c to mm/folio.c, and moving MM-internal reclaim declarations into mm/internal.h. - "userfaultfd: working set tracking for VM guest memory" (Kiryl Shutsemau) Add userfaultfd support for tracking the working set of VM guest memory, so a VMM can identify hot pages and reclaim cold ones to tiered or remote storage - "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 2)" (David Hildenbrand) Remove the remaining pieces of CONFIG_HAVE_BOOTMEM_INFO_NODE, performing some smaller cleanups around freeing of reserved vmemmap pages on the way. - "mm/damon: update probe hits for runtime parameter commits" (SJ Park) Ensure that DAMON's probe_hits attribute counter is properly updated when monitoring intervals are changed at runtime, matching the behavior of nr_accesses. To achieve this, it refactors and renames existing helper functions for shared use, applies the updates to probe_hits, and handles edge cases in damon_probe_hits_mvsum() to maintain measurement accuracy. - "KSM: performance optimizations for rmap_walk_ksm" (xu xin) Resolve a severe KSM reverse-mapping performance bottleneck where thousands of split VMAs sharing a single anon_vma cause extended lock contention. By adding an interval-filtering check during the rmap walk, it reduces worst-case anon_vma lock hold times from over 500ms down to under 2ms, preventing application freezes and latency spikes under memory pressure. - "mm: split a couple of headers from internal.h" (Mike Rapoport) Split declarations related to mm_init, memblock, vmalloc and sparse into new headers - "KSM: use linear_page_index in collect_procs_ksm()" (xu xin) Apply the interval tree optimization from rmap_walk_ksm() to collect_procs_ksm() to avoid iterating over non-matching VMAs during KSM memory error handling. It hoists loop-invariant address initialization and restricts the anon_vma_interval_tree_foreach walk to a targeted page offset range, reducing redundant checks and improving lookup efficiency. - "selftests/mm: avoid false failures in hugetlb and KSM tests" (Sayali Patil) Fix issues in the hugetlb and KSM MM selftest categories that can report failures when the prerequisites for the tests are not satisfied - "mm/damon: introduce data attributes only monitoring" (SJ Park) Introduce attribute-weighted region management in DAMON, allowing users to prioritize specific data attributes (such as page sizes or cgroups) over or instead of access monitoring. By assigning weights to attribute probes, DAMON can completely disable access tracking and adjust monitoring regions based on weighted probe-hit counters to optimize monitoring quality for attribute-focused workloads. - "mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings" (Stanislav Kinsburskii) Extend hmm_range_fault() to support userfaultfd-backed regions by allowing the mmap lock to be dropped during fault handling via a new hmm_range_fault_locked() helper. By accepting a locked pointer and signaling retry status when lock release occurs, it enables page fault resolution in userfaultfd regions while preserving backward compatibility for existing callers. - "mm: make VMA page offset handling more consistent" (Lorenzo Stoakes) Clean up and standardize how vma->vm_pgoff is accessed and manipulated across file-backed and anonymous mappings in the kernel It introduces dedicated helper functions such as vma_start_pgoff(), vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while renaming rmap interval tree helpers to better reflect their functionality. These changes establish a cleaner foundation for future work that will unify virtual page offset indexing for all anonymous and CoW'd folios. - "mm: handle device-private PMDs in walk callbacks" (Usama Arif) Address kernel panics and state corruption caused by MM walk callbacks reaching non-present device-private PMD swap entries created during HMM migrations It ensures that functions which acquire pmd_trans_huge_lock() properly recognize device-private PMDs instead of assuming a present THP or a standard migration entry. - "mm/rmap: Refactor try_to_unmap_one" (Dev Jain) Refactor try_to_unmap_one by modularizing Hugetlb, anonymous-lazyfree, and anonymous-swapbacked logic into dedicated functions, laying the structural groundwork for batched anonymous large folio unmapping. - "Docs/ABI/damon: sysfs ABI document fixes and additions" (Song Hu) Fix typos and fills in missing entries in the DAMON sysfs ABI document - "dax/kmem: atomic whole-device hotplug via sysfs" (Gregory Price) Introduce an atomic sysfs state attribute and supporting DAX/MM infrastructure to prevent userland races when offlining and removing entire memory regions By adding an unplugged state alongside standard online modes, it enables whole-device atomic hotplug control while preserving backward compatibility. - "mm: convert more vm_flags_t users to vma_flags_t" (Lorenzo Stoakes) Continue transitioning the kernel from the deprecated vm_flags_t type to vma_flags_t across core memory management infrastructure. It replaces legacy type usage in core functions such as do_mmap(), unmapped area allocation, mm->def_vma_flags, and VMA operations like mlock, mprotect, and mremap. - "Two small patches to clean up mm/mm_slot.h" (xu xin) Refactor mm_slot.h by introducing mm_slot_remove() to unify duplicate slot deletion sequences in khugepaged and KSM. It also adds code documentation explaining why mm_slot_lookup and mm_slot_insert must remain as preprocessor macros rather than static inline functions. - "mm/damon/core: hide core-private struct fields" (SJ Park) Clean up DAMON core structures by consistently marking internal-only fields with private: comment tags to prevent improper direct access from outer layers. It enforces encapsulation across core structures including damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to interact through approved access APIs instead of exposing raw struct members. - "mm/damon: unurgent fixes for infinite loop, NULL de-ref and races" (SJ Park) Address potential infinite loops, NULL dereferences, and race conditions identified in DAMON It fixes an infinite loop triggered by extreme user configurations, a NULL pointer dereference within unit tests and minor monitoring accuracy degradation caused by subtle runtime races. - "mm/page_alloc: fixes for free_pages_nolock() on RT/UP" (Brendan Jackman) Fix an NMI safety flaw in __free_frozen_pages() where freeing pages on non-SMP or PREEMPT_RT kernels can bypass can_spin_trylock() checks via non-PCP or isolated migration paths. It also resolves potential kernel crashes and privilege escalation risks triggered when BPF tracing runs in NMI context alongside memory hotplug or large allocation frees. - "mm/page_alloc: couple of followups for recent cleanups" (Brendan Jackman) Clean up and update page allocator nomenclature, documentation, and debug assertions. It aligns internal FPI_ flags with the public "nolock" naming convention, removes outdated internal implementation details from high-level page allocator comments, and eliminates obsolete VM_BUG_ON() assertions in allocation paths. - "mm/mseal: further cleanups" (Lorenzo Stoakes) Refactor and simplify the mseal implementation by clarifying API boundaries and removing unnecessary code complexity. It replaces generic do_mseal() usage outside the syscall with a dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO, eliminates mm_struct parameters to enforce that sealing applies only to current->mm, and streamlines overall logic and comments with no functional changes intended. - "mm/vmscan: fix swappiness=max and clean up per-node proactive reclaim" (Ridong Chen) Resolve reclaim behavior bugs and clean up function parameters across memory reclaim paths It fixes swappiness=max in both standard reclaim and MGLRU so unswappable anonymous memory no longer falls back to evicting page cache, ensures reclaim_store() returns accurate error codes instead of collapsing all failures into -EAGAIN, and removes the obsolete gfp_mask parameter from __node_reclaim(). - "mm: mincore: misc cleanups" (Kefeng Wang) Clean up and simplifies the mincore code. Most importantly, it removes the historical special behavior that always reports VM_PFNMAP pages as non-resident. - "mm/huge_memory: drop dead split helper variants" (Kiryl Shutsemau) Two trivial cleanups in the folio split API - "mm/damon: fix uninitialized DAMOS field and kunit exec expectation bugs" (SJ Park) Resolve minor operational and testing bugs in DAMON identified by Sashiko. It initializes the damos->last_applied field to prevent occasional efficiency degradation and fixes invalid memory accesses in DAMON KUnit tests during test failure handling. - "cleanup for stable_page_flags()" (Jinjiang Tu) Clean up and refactor stable_page_flags() used by /proc/kpageflags without altering functionality. It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag bits, converts folio-specific flag checks to standard folio_test_*() helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling. - "Batch unmap of uffd-wp file folios" (Dev Jain) Extend batched folio unmapping support to file folios within userfaultfd write-protect (uffd-wp) VMAs by adding batching capabilities to pte_install_uffd_wp_if_needed(). This removes special-case restrictions on uffd-wp VMAs in try_to_unmap_one(), significantly simplifying the function's control flow and complexity. - "mm/early_ioremap: clarify and clean up early_ioremap_reset()" (Sang-Heon Jeon) Clarify and clean up the architecture-specific usage of __late_set_fixmap() and __late_clear_fixmap() after early_ioremap_reset() It adds explicit documentation regarding when early_ioremap_reset() must be called and removes redundant macro definitions and reset calls in the RISC-V and ARM64 architectures. - "mm: fix reclaim storms in defrag_mode" (Johannes Weiner) Address severe performance regressions, swap storms, and spurious OOMs caused by vm.defrag_mode=1 under high memory pressure in Meta production It updates the page allocator slowpath so non-movable allocation requests actively trigger direct reclaim and direct compaction at pageblock_order scale, allowing them to claim whole pageblocks rather than spinning unproductively. - "zram: lockmap tweaks" (Sebastian Siewior) Optimize and fix lockdep tracking for zram devices by consolidating per-entry lockmaps and isolate lock classes across multiple instances This reduces memory overhead by replacing per-entry lockdep_map instances with a single map per struct zram, and assigns a dynamic lock_class_key to each instance to prevent false deadlock reports when different zram devices are backed by distinct filesystems. * tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (501 commits) selftests/mm: thuge-gen: fix test_shmget() for PAGE_SIZE check selftests/mm: unpoison pages in memory-failure teardown mm/shmem: downgrade final i_blocks check in shmem_evict_inode() to pr_warn() mm/khugepaged: replace mutex_lock/mutex_unlock usage with guard macro mm/zsmalloc: fix release order of locks in zs_page_migrate() Documentation: zram: remove sections numbering ksm: stop iterating VMAs when ksm_test_exit returns true mm: fold userfaultfd_rwp() to false without CONFIG_ARCH_HAS_PTE_PROTNONE mm/migrate: report RCU-tasks quiescent states in migrate_pages_batch() zram: use a custom key for each zram object zram: move lockmap to be per-zram instead per table selftests/mm: fix gup_longterm EINVAL error message mm: page_alloc: fix non-movable reclaim storm in defrag_mode mm: page_alloc: move capture_control to the page allocator mm: compaction: support non-movable compaction for pageblock requests mm: page_alloc: __GFP_FS lockdep annotation for direct compaction hugetlb: evaluate subpool free state while locked mm/damon: remove trailing semicolons after function definitions mm/damon/ops-common: prevent migration fallback to non-target nodes mm/damon: update outdated comment about DAMOS filter handling ...
2026-08-20BackMerge tag 'v7.2' into drm-nextDave Airlie
Linux 7.2 There was a lot of conflicts this round between fixes and next, and I'd like to get the merge resolutions that we have in drm-tip. Signed-off-by: Dave Airlie <airlied@redhat.com>
2026-08-19accel/amdxdna: return early from a zero-length flushTaimuraz Kaitmazov
SYNC_BO does not constrain its size, so a request for zero bytes reaches drm_clflush_virt_range(), which ends with an unconditional clflushopt(end - 1). For an empty range that is the byte before the mapping, and abo->mem.kva comes from vmap(), so the access lands in the guard page below the vmalloc area and faults: BUG: unable to handle page fault for address: ffffd16fbbc70fff #PF: supervisor read access in kernel mode Oops: Oops: 0000 [#1] SMP NOPTI CPU: 7 UID: 1000 Comm: sync_bo_probe RIP: 0010:drm_clflush_virt_range+0x3c/0x70 Call Trace: amdxdna_drm_sync_bo_ioctl+0x124/0x430 [amdxdna] drm_ioctl+0x301/0x4c0 __x64_sys_ioctl+0x115/0x2f0 do_syscall_64+0xa6/0x3d0 Any process that can open the render node can do this. Reproduced 3 of 3 times on a Strix Point NPU (1022:17f0), by calling SYNC_BO with size 0 on an AMDXDNA_BO_SHARE object. The import arm takes the same request but flushes the whole scatterlist, so it survives it. Nothing needs flushing for an empty range, so answer before choosing a path. Fixes: e252e3f3488a ("accel/amdxdna: Revise device bo creation and free") Cc: stable@vger.kernel.org Signed-off-by: Taimuraz Kaitmazov <taimuraz@kaitmazov.com> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260817230655.356785-1-taimuraz@kaitmazov.com
2026-08-12accel/amdxdna: Skip unmapped range in aie2_populate_range()Lizhi Hou
aie2_populate_range() incorrectly failed jobs for BOs with multiple mmaps: if the unmapped entry appeared first in umap_list, the loop would pick it up, call hmm_range_fault() on a gone VMA, and return -EFAULT without ever trying the remaining valid mapps. Fix it by skipping unmapped entries. After the loop, if the map list is empty or all maps are valid, map_invalid can be cleared normally. Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260812205628.810816-1-lizhi.hou@amd.com
2026-08-11Revert "accel/amdxdna: Remove drm_sched_init_args->num_rqs usage"Tvrtko Ursulin
This reverts commit ac58121339db0178186d256a956bb65feb8b6e45. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com> Cc: Luke.Wildhardt@proton.me Cc: Matthew Brost <matthew.brost@intel.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Philipp Stanner <phasta@kernel.org> Cc: Christian König <ckoenig.leichtzumerken@gmail.com> Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net> Link: https://lore.kernel.org/r/20260811163139.99746-16-tvrtko.ursulin@igalia.com
2026-08-04accel/amdxdna: use hmm_range_fault_unlocked_timeout() for range populationStanislav Kinsburskii
aie2_populate_range() takes mmap_read_lock() only around hmm_range_fault(). It also open-codes the mmu interval sequence setup before each HMM walk and retries -EBUSY until HMM_RANGE_DEFAULT_TIMEOUT expires. Use hmm_range_fault_unlocked_timeout() instead. The HMM helper now owns the mmap lock and refreshes mapp->range.notifier_seq for its internal retries, so the driver only needs to call the helper and then validate the sequence before marking the mapping populated. Pass HMM_RANGE_DEFAULT_TIMEOUT as the helper retry budget for each HMM population attempt. This scopes the timeout to repeated HMM notifier retries while preserving the existing outer loop that moves between invalid mappings and restarts when the interval is invalidated before the driver updates its mapping state. Keep returning -ETIME when the HMM retry budget expires, matching the driver's existing timeout error convention. Link: https://lore.kernel.org/20260723-hmm-v10-v11-7-c55b003a4b61@gmail.com Signed-off-by: Stanislav Kinsburskii <skinsburskii@gmail.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Dave Airlie <airlied@gmail.com> Cc: David Hildenbrand <david@kernel.org> Cc: Dexuan Cui <decui@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Leon Romanovsky <leon@kernel.org> Cc: Liam R. Howlett <liam@infradead.org> Cc: Lizhi Hou <lizhi.hou@amd.com> Cc: Long Li <longli@microsoft.com> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Lyude <lyude@redhat.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Oded Gabbay <ogabbay@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Zimemrmann <tzimmermann@suse.de> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Wei Liu <wei.liu@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-07-31accel/amdxdna: Fix locally exploitable BUG_ON in amdxdna_insert_pages()Lizhi Hou
In amdxdna_insert_pages(), vm_flags_mod() sets VM_MIXEDMAP and clears VM_PFNMAP. If an unprivileged userspace process mmaps a non-imported GEM object and then calls madvise(MADV_DONTNEED), the PTEs will be successfully cleared because VM_MIXEDMAP allows this (unlike VM_PFNMAP). When userspace subsequently accesses the memory, drm_gem_shmem_fault() handles the page fault and attempts to map the backing shmem page via vmf_insert_pfn() which calls vmf_insert_pfn_prot(). Because the backing shmem page is normal system memory (pfn_valid(pfn) is true) and the VMA now has VM_MIXEDMAP set, won't this predictably trigger the explicit assertion BUG_ON((vma->vm_flags & VM_MIXEDMAP) && pfn_valid(pfn)) Fix by removing the vm_flags_mod() call and replacing the vm_insert_pages() pre-population with the handle_mm_fault() loop that was already used for the import (dma-buf) path. Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260731185955.3449311-1-lizhi.hou@amd.com
2026-07-31accel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()Lizhi Hou
Two error paths in amdxdna_insert_pages() called vma->vm_ops->close(vma) before returning an error code to the caller. This is incorrect: amdxdna_gem_obj_mmap() registers an HMM interval notifier before calling amdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo that registration. Calling vm_ops->close() manually — which drops the shmem pages_pin_count and the GEM object reference that backs the VMA — before the mmap syscall has even returned causes those resources to be released while the VMA is still alive. The kernel VMA teardown will call vm_ops->close() a second time when the process later unmaps the range, producing a reference count underflow. Replace both hard-error returns with a deferred-fault approach that keeps the VMA alive and retries page insertion through the HMM range-fault path. Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260723074256.2435143-1-lizhi.hou@amd.com
2026-07-19accel/amdxdna: Fix command timeout raceWendy Liang
When two commands enter aie2_sched_job_timedout() concurrently, both check the timeout detection state. The first scheduler thread observes tdr_status as SIGNALED and updates it to WAIT. The second thread then observes the updated state instead of the original SIGNALED state, which may cause the command timeout to be handled incorrectly. Replace tdr_status with last_signal_ts, which records the timestamp of the last driver signal. Timeout detection now only reads last_signal_ts and never modifies it, allowing multiple serialized detect() calls under dev_lock to evaluate the same signal timestamp independently. If there is not any new job scheduled or completed within tdr_timeout_ms, the command will timeout. Fixes: 9022f010977f ("accel/amdxdna: Check for device hang on job timeout") Signed-off-by: Wendy Liang <wendy.liang@amd.com> Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260718083409.1825940-1-lizhi.hou@amd.com
2026-07-16accel/amdxdna: Fix use-after-free of mm_struct in job schedulerLizhi Hou
amdxdna_cmd_submit() stores current->mm in job->mm without holding any reference. aie2_sched_job_run() later access job->mm from the DRM scheduler worker thread. With only a raw pointer and no structural reference, the mm_struct can be freed before the scheduler runs the job. Fix this by calling mmgrab() to hold a structural mm_count reference for the lifetime of the job, paired with mmdrop() in every cleanup path. Fixes: aac243092b70 ("accel/amdxdna: Add command execution") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260716151305.1595780-1-lizhi.hou@amd.com
2026-07-14accel/amdxdna: reject command submission on devices without a submit opDoruk Tan Ozturk
amdxdna_cmd_submit() calls xdna->dev_info->ops->cmd_submit() unconditionally, but only aie2_dev_ops defines that callback. aie4_vf_ops (the AIE4 SR-IOV virtual function) does not, so a user AMDXDNA_EXEC_CMD ioctl on an AIE4 device reaches a NULL function-pointer call and oopses the kernel. AIE4 submits work through a mapped user queue and doorbell, not this ioctl path. Reject the submission early with -EOPNOTSUPP when the device provides no cmd_submit op, so the shared EXEC ioctl is a clean no-op on such devices. Fixes: aac243092b70 ("accel/amdxdna: Add command execution") Cc: stable@vger.kernel.org Found by 0sec automated security-research tooling (https://0sec.ai). Assisted-by: 0sec:claude-opus-4-8 Signed-off-by: Doruk Tan Ozturk <doruk@0sec.ai> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260713173030.87541-3-doruk@0sec.ai
2026-07-14accel/amdxdna: reject user command submission without a command BODoruk Tan Ozturk
amdxdna_drm_submit_execbuf() passes the user-supplied command BO handle straight into amdxdna_cmd_submit() with drv_cmd == NULL. When the handle is AMDXDNA_INVALID_BO_HANDLE (0), the block that fetches job->cmd_bo is skipped, leaving it NULL, and no check rejects it on the user path (the !job->cmd_bo guard lives inside the != INVALID branch). The job is then armed and pushed to the DRM scheduler. aie2_sched_job_run() takes the drv_cmd == NULL path and calls amdxdna_cmd_set_state(job->cmd_bo) -> amdxdna_gem_vmap(NULL) -> to_gobj(NULL)->dev, a NULL pointer dereference in the drm_sched worker. A process with access to the accel node on a system with a probed AMD NPU can trigger a kernel oops with a single AMDXDNA_EXEC_CMD ioctl (cmd_handles = 0). Only internal driver commands (SYNC_DEBUG_BO / ATTACH_DEBUG_BO) legitimately pass AMDXDNA_INVALID_BO_HANDLE, and they always set drv_cmd. Reject the invalid handle for user submissions (drv_cmd == NULL) at the submit choke point so every user path is covered. Fixes: aac243092b70 ("accel/amdxdna: Add command execution") Cc: stable@vger.kernel.org Found by 0sec automated security-research tooling (https://0sec.ai). Assisted-by: 0sec:claude-opus-4-8 Signed-off-by: Doruk Tan Ozturk <doruk@0sec.ai> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260713173030.87541-2-doruk@0sec.ai
2026-07-07accel/amdxdna: Fix potential NULL pointer dereference of abo->clientLizhi Hou
Closing a BO handle clears abo->client, while the underlying GEM object may remain alive due to internal kernel references. As a result, code executed after the BO handle is closed may dereference a NULL abo->client pointer. Remove accesses to abo->client from code paths that may execute after the BO handle has been closed. Fixes: d76856beb4a4 ("accel/amdxdna: Refactor GEM BO handling and add helper APIs for address retrieval") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260707201556.562191-1-lizhi.hou@amd.com
2026-07-07accel/amdxdna: Check init_srcu_struct() return valueLizhi Hou
The return value of init_srcu_struct() is currently ignored. If initialization fails, subsequent use of hwctx_srcu may result in invalid memory accesses. Check the return value of init_srcu_struct() and propagate the error to the caller. Fixes: aac243092b70 ("accel/amdxdna: Add command execution") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260707172323.539721-1-lizhi.hou@amd.com
2026-07-07accel/amdxdna: Check drmm_mutex_init() return valueLizhi Hou
drmm_mutex_init() may fail and return an error. Check the return value and abort initialization if mutex creation fails. Fixes: 8c9ff1b181ba ("accel/amdxdna: Add a new driver for AMD AI Engine") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260707172307.539676-1-lizhi.hou@amd.com
2026-07-07accel/amdxdna: Fix hardware context race in amdxdna_update_heap()Lizhi Hou
amdxdna_update_heap() iterates over hardware contexts while holding xdna->dev_lock. During the iteration, amdxdna_pm_resume_get_locked() may temporarily release and reacquire the lock, allowing hardware contexts to be modified concurrently. Fix the race by calling amdxdna_pm_resume_get_locked() before iterating over hardware contexts. Fixes: dbc8fd7a03cb ("accel/amdxdna: Add expandable device heap support") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260707055818.479165-1-lizhi.hou@amd.com
2026-07-07accel/amdxdna: Fix deadlock on debug BO command timeoutLizhi Hou
Both amdxdna_hwctx_sync_debug_bo() and amdxdna_drm_config_hwctx_ioctl() hold xdna->dev_lock while invoking backend operations. If the hardware hangs, aie2_cmd_wait() blocks waiting for a firmware response. When the DRM scheduler timeout expires, aie2_sched_job_timedout() is invoked to reset the hardware. However, the timeout handler also attempts to acquire dev_lock, resulting in a deadlock. Avoid this by releasing dev_lock before waiting for the firmware response and reacquiring it after the wait completes. This allows the timeout handler to proceed with device recovery when a debug BO command times out. Fixes: 7ea046838021 ("accel/amdxdna: Support firmware debug buffer") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260707055732.479103-1-lizhi.hou@amd.com
2026-07-07accel/amdxdna: fix open_ref leak and stale client pointer on dma map failureLizhi Hou
amdxdna_gem_obj_open() increments open_ref before attempting to set up the DMA address mapping. When amdxdna_dma_map_bo() fails, the function returned immediately without rolling back either change made on the first open (open_ref == 1 path). Fix it by decrementing open_ref and clearing abo->client on the error path. Fixes: ece3e8980907 ("accel/amdxdna: Allow forcing IOVA-based DMA via module parameter") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260707055658.479049-1-lizhi.hou@amd.com
2026-07-07accel/amdxdna: Fix potential amdxdna_umap lifetime raceLizhi Hou
amdxdna_umap_release() calls the blocking mmu_interval_notifier_remove() before removing the object from abo->mem.umap_list. If aie2_populate_range() runs concurrently, it may obtain a reference to an amdxdna_umap that is being released, leading to a potential use-after-free. Use kref_get_unless_zero() in aie2_populate_range() when acquiring a reference. If the reference count has already dropped to zero, release is in progress and the entry is skipped. Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260706221228.434099-1-lizhi.hou@amd.com
2026-07-06accel/amdxdna: Fix VMA access raceLizhi Hou
aie2_populate_range() and amdxdna_umap_release() access a saved VMA pointer that may have already been freed, leading to a potential use-after-free. Remove the VMA accesses from these functions to avoid the race. Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260609011242.2833740-1-lizhi.hou@amd.com
2026-07-06accel/amdxdna: Use unsigned long for nr_pages in amdxdna_hmm_register()Lizhi Hou
nr_pages is declared as u32 in amdxdna_hmm_register(), which may not be large enough to represent the number of pages for large mappings. Use unsigned long for nr_pages to avoid potential overflow. Fixes: ac49797c1815 ("accel/amdxdna: Add GEM buffer object management") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260616061532.3533469-1-lizhi.hou@amd.com
2026-07-06accel/amdxdna: Prevent PM resume deadlock in hwctx_sync_debug_bo()Lizhi Hou
amdxdna_hwctx_sync_debug_bo() invokes the hardware hwctx_sync_debug_bo() callback while holding xdna->dev_lock. The callback may call amdxdna_cmd_submit(), which in turn calls amdxdna_pm_resume_get(). If the device is suspended, amdxdna_pm_resume_get() may synchronously execute amdxdna_pm_resume(), which also acquires xdna->dev_lock, resulting in a deadlock. Avoid the deadlock by calling amdxdna_pm_resume_get() before holding xdna->dev_lock in both amdxdna_hwctx_sync_debug_bo() and amdxdna_drm_config_hwctx_ioctl() Fixes: 7ea046838021 ("accel/amdxdna: Support firmware debug buffer") Reviewed-by: Max Zhen <max.zhen@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260616212429.3620645-1-lizhi.hou@amd.com
2026-07-06Merge tag 'drm-misc-next-2026-06-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/misc/kernel into drm-next drm-misc-next for 7.3: UAPI Changes: - connector: Add color format property Cross-subsystem Changes: - dmem: introduce a peak file Core Changes: - atomic: Add create_state callback and helpers to all objects, add documentation on atomic commit lifetime - buddy: Fix use-after-free, add per-order free and used block scoreboards - gem: Remove DRIVER_GEM_GPUVA feature flag - hdmi: Hook the color format property in the helpers - mipi-dsi: Add MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT flag - sched: Add test suite for concurrent job submissions - virtio: Add support for saving and restoring virtio_gpu_objects, abort virtqueue wait on device removal to avoid hung task Driver Changes: - amdgpu: Implement "color format" DRM property - amdxdna: Disable device buffer exporting - ethosu: Add performance counter support - msm: Support DSC configurations with slice_per_pkt > 1 - mxsfb: Fix disable sequence - panthor: Support sparse mappings - rockchip: Support YUV background color, Fix layer config timeout, add edp support for rk3576, cleanups and formats improvements - solomon: Add a batch command submission function - tegra: Add DSI support for Tegra 20 and 30, fix dsi driver when the firmware hasn't enabled the controller, - v3d: Reduce PM runtime autosuspend delay, Scheduler and submission fixes and refactoring, Deprecate V3D 3.3 and 4.1 support - bridge: - display-connector: don't autoenable HPD IRQ, trigger initial HPD event for DP - dw-dp: Null pointer dereference and use-after-free fixes - ti-sn65dsi83: Remove NO_HFP and NO_HBP mode flags - panel: - himax-hx83121a: add backlight regulator support - novatek-nt36672a: Inline panel init sequences - panel-edp: Add quirks for AUO B116XAT04.3, CMN N116BCP-EA2, CSW MNB601LS1-8, BOE NV116WH2-M30, BOE NT116WHM-N21, BOE NV116FH1-M31, BOE NV116FH1-M30, NV140FHM-N5B, TM156VDXP25 - New panels: Samsung ATNA40HQ08-0, Anbernic TD4310, Chipone ICNA35XX, Ilitek ILI9488 Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <mripard@redhat.com> Link: https://patch.msgid.link/20260619-burgundy-termite-of-whirlwind-f7a4dd@houat
2026-07-02accel/amdxdna: Fix use-after-free in amdxdna_gem_dmabuf_mmap()Wentao Liang
When vm_insert_pages() fails, the error path calls vma->vm_ops->close(vma) which internally calls drm_gem_vm_close() → drm_gem_object_put(), releasing the GEM object reference acquired at the start of the function. However, the close_vma label then falls through to put_obj, which calls drm_gem_object_put() a second time on the same object. If the first put releases the last reference, the object is freed and the second put accesses freed memory, causing a use-after-free. Fix by returning directly from close_vma instead of falling through to put_obj, since the close handler already performs all necessary cleanup including the object put. Cc: stable@vger.kernel.org Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Signed-off-by: Wentao Liang <vulab@iscas.ac.cn> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260625113239.49764-1-vulab@iscas.ac.cn
2026-07-01accel/amdxdna: Fix use-after-free in debug BO command handlingLizhi Hou
When a debug BO command completes, job->drv_cmd may already have been freed. Accessing it from aie2_sched_drvcmd_resp_handler() can result in a use-after-free and memory corruption. Fix this by introducing reference counting for drv_cmd objects and transferring ownership to the job while it is in flight. This ensures that the command remains valid until the completion handler finishes processing it. Fixes: 7ea046838021 ("accel/amdxdna: Support firmware debug buffer") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260701155556.663541-1-lizhi.hou@amd.com
2026-06-29accel/amdxdna: Fix iommu domain lifetime race during device removalLizhi Hou
When force_iova mode is enabled, amdxdna_remove() frees xdna->domain. If amdxdna_gem_obj_free() is called after device removal, it may attempt to access xdna->domain, resulting in a use-after-free. Fix the race by adding freeing xdna->domain as a managed release action, so its lifetime is managed by DRM and remains valid until all managed resources are released. Fixes: ece3e8980907 ("accel/amdxdna: Allow forcing IOVA-based DMA via module parameter") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260611055150.3070216-3-lizhi.hou@amd.com
2026-06-29accel/amdxdna: Fix notifier_wq lifetime race during device removalLizhi Hou
amdxdna_remove() destroys notifier_wq. If amdxdna_gem_obj_free() is called after device removal, it may attempt to flush notifier_wq, resulting in a use-after-free. Fix the race by allocating notifier_wq with drmm_alloc_ordered_workqueue(), so its lifetime is managed by DRM and remains valid until all managed resources are released. Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260611055150.3070216-2-lizhi.hou@amd.com
2026-06-29accel/amdxdna: Fix amdxdna_client lifetime race during device removalLizhi Hou
In amdxdna_remove(), all amdxdna_client structures are freed after calling drm_dev_unplug(). However, drm_dev_unplug() does not force existing file descriptors to be closed, so amdxdna_drm_close() may be called after amdxdna_remove() has completed. As a result, accessing client->pid for debug output in amdxdna_drm_close() can lead to a use-after-free, since the access is not protected by drm_dev_enter(). Fix this by decoupling hardware teardown from client cleanup. amdxdna_remove() only performs hardware-related cleanup, while per-client resources are released from amdxdna_drm_close() when the corresponding file is closed. Fixes: be462c97b7df ("accel/amdxdna: Add hardware context") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260611055150.3070216-1-lizhi.hou@amd.com
2026-06-26Merge tag 'drm-fixes-2026-06-27' of https://gitlab.freedesktop.org/drm/kernelLinus Torvalds
Pull drm fixes from Dave Airlie: "These are just the fixes from our fixes branch, all pretty small and scattered. sysfb: - drm/sysfb truncation and alignment fixes edid: - fix edid OOB read in tile parsing - increase displayid topology id to correct size nouveau: - fix error handling paths in nouveau amdxdna: - get_bo_info fix ivpu: - fix leak when error handling in ivpu" * tag 'drm-fixes-2026-06-27' of https://gitlab.freedesktop.org/drm/kernel: drm/sysfb: Avoid truncating maximum stride drm/sysfb: Return errno code from drm_sysfb_get_visible_size() drm/sysfb: Avoid possible truncation with calculating visible size drm/sysfb: Do not page-align visible size of the framebuffer drm/edid: fix OOB read in drm_parse_tiled_block() drm/nouveau: fix reversed error cleanup order in ucopy functions drm/nouveau/acr: fix missing nvkm_done() in error path of nvkm_acr_oneinit() accel/amdxdna: Use caller client for debug BO sync drm/displayid: fix Tiled Display Topology ID size accel/ivpu: fix HWS command queue leak on registration failure
2026-06-17Merge tag 'drm-next-2026-06-17' of https://gitlab.freedesktop.org/drm/kernelLinus Torvalds
Pull drm updates from Dave Airlie: "Highlights: - xe: add initial CRI platform support - amdgpu: initial HDMI 2.1 FRL support - rust: add some new type concepts for device lifetimes - scheduler: moves to a fair algorithm and lots of cleanups But it's mostly the usual mountain of changes across the board. core: - add docbook for DRM_IOCTL_SYNCOBJ_EVENTFD - change signature of drm_connector_attach_hdr_output_metadata_property - dedup counter and timestamp retrieval in vblank code - parse AMD VSDB v3 in CTA extension blocks - add P230, Y7, XYYY2101010, T430, XVUY210101010 formats - don't call drop master on file close if not master - use drm_printf_indent in atomic / bridge - fix 32b format descriptions - docs: fix toctree - hdmi: add common TMDS character rates - fix drm_syncobj_find_fence leak rust: - introduce Higher-Ranked lifetime types - replace drvdata with scoped registration data - add GPUVM immediate mode abstraction for rust GPU drivers - introduce DeviceContext type state for drm::Device bridge: - clarify drm_bridge_get/put - create drm_get_bridge_by_endpoint and use it - analogix_dp: add panel probing - ite-it6211 - use drm audio hdmi helpers buddy: - add lockdep annotations dp: - add PR and VRR updates - mst: fix buffer overflows - add Adaptive Sync SDP decoding support - fix OOB reads in dp-mst ttm: - bump fpfn/lpfn to 64-bit scheduler: - change default to fair scheduler - map runqueue 1:1 with scheduler dma-buf: - port selftests to kunit - convert dma-buf system/heap allocators to module - add separate DMABUF_HEAPS_SYSTEM_CC_SHARED Kconfig udmabuf: - revert hugetlb support - fix error with CONFIG_DMA_API_DEBUG dma-fence: - fix tracepoints lifetime - remove unused signal on any support ras: - add clear error counter netlink command to drm ras gpusvm: - reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges - use IOVA allocations pagemap: - use IOVA allocations panels: - update to use ref counts - add support for CSW PNB601LS1-2, LGD LP116WHA-SPB1 - add support for waveshare panels - CMN N116BCN-EA1, CMN N140HCA-EEK, IVO M140NWFQ R5, - IVO, R140NWFW R0, BOE NT140*, BOE NV133FHM-N4F, - AUO B140*, AUO B133HAN06.6 and AUO B116XTN02.3 eDP panels - Surface Pro 12 Panel xe: - add CRI PCI-IDs - debugfs add multi-lrc info - engine init cleanup - PF fair scheduling auto provisioning - system controller support for CRI/Xe3p - PXP state machine fixes - Reset/wedge/unload corner case fixes - Wedge path memory allocation fixes - PAT type cleanups - Reject unsafe PAT for CPU cached memory - OA improvements for CRI device memory - kernel doc syntax in xe headers - xe_drm.h documentation fixes - include guard cleanups - VF CCS memory pool - i915/xe step unification - Xe3p GT tuning fixes - forcewake cleanup in GT and GuC - admin-only PF mode - enable hwmon energy attributes for CRI - enable GT_MI_USER_INTERRUPT - refactor emit functions - oa workarounds - multi_queue: allow QUEUE_TIMESTAMP register - convert stolen memory to ttm range manager - use xe2 style blitter as a feature flag - make drm_driver const - add/use IRQ page to HW engine definition - fix oops when display disabled i915: - enable PIPEDMC_ERROR interrupt - more common display code refactoring - restructure DP/HDMI sink format handling - eliminate FB usage from lowlevel pinning code - panel replay bw optimization - integrate sharpness filter into the scaler - new fb_pin abstraction for xe/i915 fb transparent handling - skip inactive MST connectors on HDCP - start switching to display specific registers - use polling when irq unavailable - Adaptive-sync SDP prep amdgpu: - use drm_display_info for AMD VSDB data - Initial HDMI 2.1 FRL support - Initial DCN 4.2.1 support - GART fixes for non-4k pages - GC 11.5.6/SDMA 6.4.0/and other new IPs - GFX9/DCE6/Hawaii/SDMA4/GART/Userq fixes - Finish support for using multiple SDMA queues for TTM operations - SWSMU updates - GC 12.1 updates - SMU 15.0.8 updates - DCN 4.2 updates - DC type conversion fixes - Enable DC power module - Replay/PSR updates - SMU 13.x updates - Compute queue quantum MQD updates - ASPM fix - Align VKMS with common implementation - DC analog support fixes - UVD 3 fixes - TCC harvesting fixes for SI - GC 11 APU module reload fix - NBIO 6.3.2 support - IH 7.1 updates - DC cursor fixes - VCN/JPEG user fence fixes - DC support for connectors without DDC - Prefer ROM BAR for default VGA device - DC bandwidth fixes - Add PTL support for profiler - Introduce dc_plane_cm and migrate surface update color path - Add FRL registers for HDMI 2.1 - Restructure VM state machine - Auxless ALPM support - GEM_OP locking/warning fixes - switch to system_dfl_wq amdkfd: - GPUVM TLB flush fix - Hotplug fix - Boundary check fixes - SVM fixes - CRIU fixes - add profiler API - MES 12.1 updates msm: - core: - fix shrinker documentation - IFPC enabled for gen8 - PERFCNTR_CONFIG ioctl support - GPU: - reworked UBWC handling - a810 support - MDSS: - add support for Milos platform - reworked UBWC handling - DisplayPort: - reworked HPD handling as prep for MST - DPU: - Milos platform support - reworked UBWC handling - DSI: - Milos platform support nova: - Hopper/Blackwell enablement (GH100/GB100/GB202) - FSP support - 32-bit firmware support - HAL functions - refactor GSP boot/unload - GA100 support - VBIOS hardening/refactoring - Adopt higher order lifetime types tyr: - define register blocks - add shmem backed GEM objects - adopt higher order lifetime types - move clock cleanup into Drop radeon: - Hawaii SMU fixes - CS parser fix - use struct drm_edid instead of edid amdxdna: - export per-client BO memory via fdinfo - AIE4 device support - support medium/lower power modes - expandable device heap support - revert read-only user-pointer BO mappings ivpu: - support frequency limiting panthor: - enable GEM shrinker support - add eviction and reclaim info to fdinfo v3d: - enable runtime PM mgag200: - support XRGB1555 + C8 ast: - support XRGB1555 + C8 - use constants for lots of registers - fix register handling imagination: - fence handling refactoring nouveau: - fix sched double call - expose VBIOS on GSP-RM systems - add GA100 support virtio: - add VIRTIO_GPU_F_BLOB_ALIGNMENT flag - add deferred mapping support gud: - add RCade Display Adapter hibmc: - fix no connectors usage mediatek: - hdmi: convert error handling - simplify mtk_crtc allocation exynos: - move fbdev emulation to drm client buffers - use drm format helpers for geometry/size - adopt core DMA tracking - fix framebuffer offset handling renesas: - add RZ/T2H SOC support versilicon: - add cursor plane support tegra: - use drm client for framebuffer" * tag 'drm-next-2026-06-17' of https://gitlab.freedesktop.org/drm/kernel: (1731 commits) dma-buf: move system_cc_shared heap under separate Kconfig accel/amdxdna: Clear sva pointer after unbind agp/amd64: Fix broken error propagation in agp_amd64_probe() accel/amdxdna: Require carveout when PASID and force_iova are disabled drm/amdkfd: always resume_all after suspend_all drm/amdgpu/gfx: move fault and EOP IRQ get/put to hw_init/hw_fini drm/amd/display: Consult MCCS FreeSync cap only if requested & supported drm/amd/pm: Use strscpy in profile mode parsing drm/amdkfd: Fix infinite loop parsing CRAT with zero subtype length drm/amdkfd: fix sysfs topology prop length on buffer truncation drm/amdgpu: drop retry loop in amdgpu_hmm_range_get_pages drm/amd/pm: bound OD parameter parsing to stack array size drm/amd/pm: Stop pp_od_clk_voltage emit at PAGE_SIZE drm/amdkfd: Unwind debug trap enable on copy_to_user failure drm/amdgpu: validate the mes firmware version for gfx12.1 drm/amdgpu: validate the mes firmware version for gfx12 drm/amdgpu: compare MES firmware version ucode for gfx11 drm/amdkfd: Add bounds check for AMDKFD_IOC_WAIT_EVENTS drm/amdgpu: restart the CS if some parts of the VM are still invalidated drm/amd/display: use unsigned types for local pipe and REG_GET counters ...
2026-06-16accel/amdxdna: Use caller client for debug BO syncShuvam Pandey
amdxdna_drm_sync_bo_ioctl() looks up args->handle in the ioctl caller's drm_file. For SYNC_DIRECT_FROM_DEVICE, it then calls amdxdna_hwctx_sync_debug_bo(), but passes abo->client. amdxdna_hwctx_sync_debug_bo() uses the passed client both as the handle namespace for debug_bo_hdl and as the owner of the hardware context xarray. Those must match the file that supplied args->handle. The BO's stored client pointer is object state, not the ioctl context. Pass filp->driver_priv instead, matching the original handle lookup. Fixes: 7ea046838021 ("accel/amdxdna: Support firmware debug buffer") Cc: stable@vger.kernel.org # v6.19+ Signed-off-by: Shuvam Pandey <shuvampandey1@gmail.com> Reviewed-by: Lizhi Hou <lizhi.hou@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/178155468039.81818.12173237984867749651@gmail.com
2026-06-11accel/amdxdna: Fix mm_struct reference leak in aie2_populate_range()Lizhi Hou
aie2_populate_range() jumps back to the again label without calling mmput(mm), leaking a reference to the mm_struct. Add the missing mmput() before jumping to again. Fixes: e486147c912f ("accel/amdxdna: Add BO import and export") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260610151127.2994185-1-lizhi.hou@amd.com
2026-06-09accel/amdxdna: Clear sva pointer after unbindLizhi Hou
Add client->sva = NULL after the unbind makes it consistent with how amdxdna_sva_fini() already clears the pointer after unbinding. The IS_ERR_OR_NULL guard in sva_fini will then correctly skip the second unbind. Fixes: 3cc5d7a59519 ("accel/amdxdna: Add carveout memory support for non-IOMMU systems") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260604202815.2425882-1-lizhi.hou@amd.com
2026-06-05accel/amdxdna: Require carveout when PASID and force_iova are disabledLizhi Hou
When both PASID and force_iova are disabled, carveout memory should be used. Reject buffer allocations that cannot use carveout memory in this configuration and return an error. Fixes: 3cc5d7a59519 ("accel/amdxdna: Add carveout memory support for non-IOMMU systems") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260604195459.2423279-1-lizhi.hou@amd.com
2026-06-03accel/amdxdna: Return errors for failed debug BO commandsLizhi Hou
The config and sync debug BO commands currently may report success even when the operation fails. Capture the firmware return status and propagate the corresponding error to userspace. Fixes: 7ea046838021 ("accel/amdxdna: Support firmware debug buffer") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260529162122.1976376-1-lizhi.hou@amd.com
2026-06-03accel/amdxdna: Remove drv_cmd tracing from job free callbackLizhi Hou
aie2_sched_job_free() accesses job->drv_cmd for tracing purposes. However, job->drv_cmd is owned by the caller and may already have been freed when the job free callback runs, leading to a potential use-after-free. Remove the job->drv_cmd access from aie2_sched_job_free(). Fixes: 8711eb2dde2e ("accel/amdxdna: Improve tracing for job lifecycle and mailbox RX worker") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260529152837.1973405-1-lizhi.hou@amd.com
2026-06-02accel/amdxdna: Preserve user address when PASID is disabledLizhi Hou
When PASID is not used, the buffer user address is set to AMDXDNA_INVALID_ADDR. As a result, heap buffer user address validation fails even though the original userspace address is available. Preserve the userspace address regardless of PASID usage so heap buffer address validation works correctly. Fixes: dbc8fd7a03cb ("accel/amdxdna: Add expandable device heap support") Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260602040624.2206774-1-lizhi.hou@amd.com
2026-05-28accel/amdxdna: Disable device buffer exportingLizhi Hou
Device buffers are never intended to be exported. Disable exporting support explicitly. Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260526185058.1780869-1-lizhi.hou@amd.com
2026-05-28Merge drm/drm-next into drm-misc-nextThomas Zimmermann
Backmerging to get GEM LRU fixes from commit 379e8f1c ("drm/gem: Make the GEM LRU lock part of drm_device") and other updates from v7.1-rc5. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
2026-05-28Merge v7.1-rc5 into drm-nextSimona Vetter
Boris Brezillion needs the gem lru fixes 379e8f1ca5e9 ("drm/gem: Make the GEM LRU lock part of drm_device") backmerged for drm-misc-next. That also means we need to sort out the rename conflict in panthor with the fixup patch from Boris from drm-tip. Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
2026-05-22Revert "accel/amdxdna: Support read-only user-pointer BO mappings"Lizhi Hou
This reverts commit f649e63d4a6423eda8eb208638849fd6396aedd7. The read-only feature requires further consideration. Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Link: https://patch.msgid.link/20260521162930.1451042-1-lizhi.hou@amd.com
2026-05-21accel/amdxdna: Block running when IOMMU is offLizhi Hou
The AIE2 device firmware requires IOMMU on. Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5319 Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260520223531.1403302-1-lizhi.hou@amd.com
2026-05-19accel/amdxdna: Remove mmap and export support for ubufLizhi Hou
Ubuf pages should not be mmaped or exported. Remove the ubuf mmap callback and return -EOPNOTSUPP when exporting ubuf objects. ubuf vmap is also removed for there is not a real use case yet. Fixes: bd72d4acda10 ("accel/amdxdna: Support user space allocated buffer") Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260518155706.937461-1-lizhi.hou@amd.com
2026-05-18accel/amdxdna: Add expandable device heap supportLizhi Hou
Introduce an expandable device heap to avoid allocating a large heap upfront. Start with a smaller initial heap and grow it on demand. Return -EAGAIN when BO allocation fails due to insufficient heap space, allowing userspace to trigger heap expansion via a heap BO creation IOCTL and retry the allocation. Manage heap chunks using an xarray. On expansion, register new chunks with the firmware via MSG_OP_ADD_HOST_BUFFER. Since heap shrinking is not supported by the firmware, release all heap chunks on device close. Co-developed-by: Wendy Liang <wendy.liang@amd.com> Signed-off-by: Wendy Liang <wendy.liang@amd.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260515161922.744647-1-lizhi.hou@amd.com
generated by cgit v1.2.3 (git 2.25.1) at 2026-09-08 01:25:12 +0000