kernel/linux.git/drivers/hv, branch master

Merge tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel

2026-04-24T18:44:52+00:00

Pull more drm fixes from Dave Airlie: "These are the regular fixes that have built up over last couple of weeks, all pretty minor and spread all over. atomic: - raise the vblank timeout to avoid it on virtual drivers - fix colorop duplication bridge: - stm_lvds: state check fix - dw-mipi-dsi: bridge reference leak fix panel: - visionx-rm69299: init fix dma-fence: - fix sparse warning dma-buf: - UAF fix panthor: - mapping fix arcgpu: - device_node reference leak fix nouveau: - memory leak in error path fix - overflow in reloc path for old hw fix hv: - Kconfig fix v3d: - infinite loop fix" * tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel: drm/nouveau: fix u32 overflow in pushbuf reloc bounds check MAINTAINERS: split hisilicon maintenance and add Yongbang Shi for hibmc-drm matainers drm/v3d: Reject empty multisync extension to prevent infinite loop drm/panel: visionox-rm69299: Make use of prepare_prev_first drm/drm_atomic: duplicate colorop states if plane color pipeline in use drm/nouveau: fix nvkm_device leak on aperture removal failure hv: Select CONFIG_SYSFB only for CONFIG_HYPERV_VMBUS dma-fence: Silence sparse warning in dma_fence_describe drm/bridge: dw-mipi-dsi: Fix bridge leak when host attach fails drm/arcpgu: fix device node leak drm/panthor: Fix outdated function documentation drm/panthor: Extend VM locked region for remap case to be a superset dma-buf: fix UAF in dma_buf_put() tracepoint drm/bridge: stm_lvds: Do not fail atomic_check on disabled connector drm/atomic: Increase timeout in drm_atomic_helper_wait_for_vblanks()

Merge tag 'drm-misc-fixes-2026-04-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

2026-04-24T03:56:54+00:00

This week in drm-misc-fixes, we have: - A patch to raise the vblank timeout to avoid it on virtual drivers - a state check fix for stm_lvds - a use-after-free fix for dma-buf - a mapping fix for panthor - a device_node reference leak fix for arcgpu - a bridge reference leak fix for dw-mipi-dsi - a sparse warning fix for dma-fence - a kconfig fix for hv - a memory leak fix for nouveau - a fix to duplicate colorop when duplicating states - a panel initialisation order fix for visionox-rm69299 - a fix to prevent an infinite loop for v3d - an overflow fix for nouveau Signed-off-by: Dave Airlie From: Maxime Ripard Link: https://patch.msgid.link/20260423-realistic-eager-reindeer-4dacf7@houat

Merge tag 'hyperv-next-signed-20260421' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2026-04-22T16:50:46+00:00

Pull Hyper-V updates from Wei Liu: - Fix cross-compilation for hv tools (Aditya Garg) - Fix vmemmap_shift exceeding MAX_FOLIO_ORDER in mshv_vtl (Naman Jain) - Limit channel interrupt scan to relid high water mark (Michael Kelley) - Export hv_vmbus_exists() and use it in pci-hyperv (Dexuan Cui) - Fix cleanup and shutdown issues for MSHV (Jork Loeser) - Introduce more tracing support for MSHV (Stanislav Kinsburskii) * tag 'hyperv-next-signed-20260421' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: x86/hyperv: Skip LP/VP creation on kexec x86/hyperv: move stimer cleanup to hv_machine_shutdown() Drivers: hv: vmbus: fix hyperv_cpuhp_online variable shadowing mshv: Add tracepoint for GPA intercept handling mshv_vtl: Fix vmemmap_shift exceeding MAX_FOLIO_ORDER tools: hv: Fix cross-compilation Drivers: hv: vmbus: Export hv_vmbus_exists() and use it in pci-hyperv mshv: Introduce tracing support Drivers: hv: vmbus: Limit channel interrupt scan to relid high water mark

x86/hyperv: Skip LP/VP creation on kexec

2026-04-22T06:23:25+00:00

After a kexec the logical processors and virtual processors already exist in the hypervisor because they were created by the previous kernel. Attempting to add them again causes either a BUG_ON or corrupted VP state leading to MCEs in the new kernel. Add hv_lp_exists() to probe whether an LP is already present by calling HVCALL_GET_LOGICAL_PROCESSOR_RUN_TIME. When it succeeds the LP exists and we skip the add-LP and create-VP loops entirely. Also add hv_call_notify_all_processors_started() which informs the hypervisor that all processors are online. This is required after adding LPs (fresh boot) and is a no-op on kexec since we skip that path. Co-developed-by: Anirudh Rayabharam Signed-off-by: Anirudh Rayabharam Co-developed-by: Stanislav Kinsburskii Signed-off-by: Stanislav Kinsburskii Co-developed-by: Mukesh Rathor Signed-off-by: Mukesh Rathor Signed-off-by: Jork Loeser Reviewed-by: Stanislav Kinsburskii Signed-off-by: Wei Liu

x86/hyperv: move stimer cleanup to hv_machine_shutdown()

2026-04-22T06:23:25+00:00

Move hv_stimer_global_cleanup() from vmbus's hv_kexec_handler() to hv_machine_shutdown() in the platform code. This ensures stimer cleanup happens before the vmbus unload, which is required for root partition kexec to work correctly. Co-developed-by: Anirudh Rayabharam Signed-off-by: Anirudh Rayabharam Signed-off-by: Jork Loeser Reviewed-by: Stanislav Kinsburskii Signed-off-by: Wei Liu

Drivers: hv: vmbus: fix hyperv_cpuhp_online variable shadowing

2026-04-22T06:23:25+00:00

vmbus_alloc_synic_and_connect() declares a local 'int hyperv_cpuhp_online' that shadows the file-scope global of the same name. The cpuhp state returned by cpuhp_setup_state() is stored in the local, leaving the global at 0 (CPUHP_OFFLINE). When hv_kexec_handler() or hv_machine_shutdown() later call cpuhp_remove_state(hyperv_cpuhp_online) they pass 0, which hits the BUG_ON in __cpuhp_remove_state_cpuslocked(). Remove the local declaration so the cpuhp state is stored in the file-scope global where hv_kexec_handler() and hv_machine_shutdown() expect it. Fixes: 2647c96649ba ("Drivers: hv: Support establishing the confidential VMBus connection") Signed-off-by: Jork Loeser Reviewed-by: Stanislav Kinsburskii Reviewed-by: Anirudh Rayabharam (Microsoft) Signed-off-by: Wei Liu

mshv: Add tracepoint for GPA intercept handling

2026-04-22T06:23:25+00:00

Provide visibility into GPA intercept operations for debugging and performance analysis of Microsoft Hypervisor guest memory management. Signed-off-by: Stanislav Kinsburskii Reviewed-by: Anirudh Rayabharam (Microsoft) Signed-off-by: Wei Liu

Merge tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-15T19:59:16+00:00

Pull MM updates from Andrew Morton: - "maple_tree: Replace big node with maple copy" (Liam Howlett) Mainly prepararatory work for ongoing development but it does reduce stack usage and is an improvement. - "mm, swap: swap table phase III: remove swap_map" (Kairui Song) Offers memory savings by removing the static swap_map. It also yields some CPU savings and implements several cleanups. - "mm: memfd_luo: preserve file seals" (Pratyush Yadav) File seal preservation to LUO's memfd code - "mm: zswap: add per-memcg stat for incompressible pages" (Jiayuan Chen) Additional userspace stats reportng to zswap - "arch, mm: consolidate empty_zero_page" (Mike Rapoport) Some cleanups for our handling of ZERO_PAGE() and zero_pfn - "mm/kmemleak: Improve scan_should_stop() implementation" (Zhongqiu Han) A robustness improvement and some cleanups in the kmemleak code - "Improve khugepaged scan logic" (Vernon Yang) Improve khugepaged scan logic and reduce CPU consumption by prioritizing scanning tasks that access memory frequently - "Make KHO Stateless" (Jason Miu) Simplify Kexec Handover by transitioning KHO from an xarray-based metadata tracking system with serialization to a radix tree data structure that can be passed directly to the next kernel - "mm: vmscan: add PID and cgroup ID to vmscan tracepoints" (Thomas Ballasi and Steven Rostedt) Enhance vmscan's tracepointing - "mm: arch/shstk: Common shadow stack mapping helper and VM_NOHUGEPAGE" (Catalin Marinas) Cleanup for the shadow stack code: remove per-arch code in favour of a generic implementation - "Fix KASAN support for KHO restored vmalloc regions" (Pasha Tatashin) Fix a WARN() which can be emitted the KHO restores a vmalloc area - "mm: Remove stray references to pagevec" (Tal Zussman) Several cleanups, mainly udpating references to "struct pagevec", which became folio_batch three years ago - "mm: Eliminate fake head pages from vmemmap optimization" (Kiryl Shutsemau) Simplify the HugeTLB vmemmap optimization (HVO) by changing how tail pages encode their relationship to the head page - "mm/damon/core: improve DAMOS quota efficiency for core layer filters" (SeongJae Park) Improve two problematic behaviors of DAMOS that makes it less efficient when core layer filters are used - "mm/damon: strictly respect min_nr_regions" (SeongJae Park) Improve DAMON usability by extending the treatment of the min_nr_regions user-settable parameter - "mm/page_alloc: pcp locking cleanup" (Vlastimil Babka) The proper fix for a previously hotfixed SMP=n issue. Code simplifications and cleanups ensued - "mm: cleanups around unmapping / zapping" (David Hildenbrand) A bunch of cleanups around unmapping and zapping. Mostly simplifications, code movements, documentation and renaming of zapping functions - "support batched checking of the young flag for MGLRU" (Baolin Wang) Batched checking of the young flag for MGLRU. It's part cleanups; one benchmark shows large performance benefits for arm64 - "memcg: obj stock and slab stat caching cleanups" (Johannes Weiner) memcg cleanup and robustness improvements - "Allow order zero pages in page reporting" (Yuvraj Sakshith) Enhance free page reporting - it is presently and undesirably order-0 pages when reporting free memory. - "mm: vma flag tweaks" (Lorenzo Stoakes) Cleanup work following from the recent conversion of the VMA flags to a bitmap - "mm/damon: add optional debugging-purpose sanity checks" (SeongJae Park) Add some more developer-facing debug checks into DAMON core - "mm/damon: test and document power-of-2 min_region_sz requirement" (SeongJae Park) An additional DAMON kunit test and makes some adjustments to the addr_unit parameter handling - "mm/damon/core: make passed_sample_intervals comparisons overflow-safe" (SeongJae Park) Fix a hard-to-hit time overflow issue in DAMON core - "mm/damon: improve/fixup/update ratio calculation, test and documentation" (SeongJae Park) A batch of misc/minor improvements and fixups for DAMON - "mm: move vma_(kernel|mmu)_pagesize() out of hugetlb.c" (David Hildenbrand) Fix a possible issue with dax-device when CONFIG_HUGETLB=n. Some code movement was required. - "zram: recompression cleanups and tweaks" (Sergey Senozhatsky) A somewhat random mix of fixups, recompression cleanups and improvements in the zram code - "mm/damon: support multiple goal-based quota tuning algorithms" (SeongJae Park) Extend DAMOS quotas goal auto-tuning to support multiple tuning algorithms that users can select - "mm: thp: reduce unnecessary start_stop_khugepaged()" (Breno Leitao) Fix the khugpaged sysfs handling so we no longer spam the logs with reams of junk when starting/stopping khugepaged - "mm: improve map count checks" (Lorenzo Stoakes) Provide some cleanups and slight fixes in the mremap, mmap and vma code - "mm/damon: support addr_unit on default monitoring targets for modules" (SeongJae Park) Extend the use of DAMON core's addr_unit tunable - "mm: khugepaged cleanups and mTHP prerequisites" (Nico Pache) Cleanups to khugepaged and is a base for Nico's planned khugepaged mTHP support - "mm: memory hot(un)plug and SPARSEMEM cleanups" (David Hildenbrand) Code movement and cleanups in the memhotplug and sparsemem code - "mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanup CONFIG_MIGRATION" (David Hildenbrand) Rationalize some memhotplug Kconfig support - "change young flag check functions to return bool" (Baolin Wang) Cleanups to change all young flag check functions to return bool - "mm/damon/sysfs: fix memory leak and NULL dereference issues" (Josh Law and SeongJae Park) Fix a few potential DAMON bugs - "mm/vma: convert vm_flags_t to vma_flags_t in vma code" (Lorenzo Stoakes) Convert a lot of the existing use of the legacy vm_flags_t data type to the new vma_flags_t type which replaces it. Mainly in the vma code. - "mm: expand mmap_prepare functionality and usage" (Lorenzo Stoakes) Expand the mmap_prepare functionality, which is intended to replace the deprecated f_op->mmap hook which has been the source of bugs and security issues for some time. Cleanups, documentation, extension of mmap_prepare into filesystem drivers - "mm/huge_memory: refactor zap_huge_pmd()" (Lorenzo Stoakes) Simplify and clean up zap_huge_pmd(). Additional cleanups around vm_normal_folio_pmd() and the softleaf functionality are performed. * tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm: fix deferred split queue races during migration mm/khugepaged: fix issue with tracking lock mm/huge_memory: add and use has_deposited_pgtable() mm/huge_memory: add and use normal_or_softleaf_folio_pmd() mm: add softleaf_is_valid_pmd_entry(), pmd_to_softleaf_folio() mm/huge_memory: separate out the folio part of zap_huge_pmd() mm/huge_memory: use mm instead of tlb->mm mm/huge_memory: remove unnecessary sanity checks mm/huge_memory: deduplicate zap deposited table call mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE() mm/huge_memory: add a common exit path to zap_huge_pmd() mm/huge_memory: handle buggy PMD entry in zap_huge_pmd() mm/huge_memory: have zap_huge_pmd return a boolean, add kdoc mm/huge: avoid big else branch in zap_huge_pmd() mm/huge_memory: simplify vma_is_specal_huge() mm: on remap assert that input range within the proposed VMA mm: add mmap_action_map_kernel_pages[_full]() uio: replace deprecated mmap hook with mmap_prepare in uio_info drivers: hv: vmbus: replace deprecated mmap hook with mmap_prepare mm: allow handling of stacked mmap_prepare hooks in more drivers ...

hv: Select CONFIG_SYSFB only for CONFIG_HYPERV_VMBUS

2026-04-15T13:37:09+00:00

Hyperv's sysfb access only exists in the VMBUS support. Therefore only select CONFIG_SYSFB for CONFIG_HYPERV_VMBUS. Avoids sysfb code on systems that don't need it. Signed-off-by: Thomas Zimmermann Fixes: 96959283a58d ("Drivers: hv: Always select CONFIG_SYSFB for Hyper-V guests") Cc: Michael Kelley Cc: Saurabh Sengar Cc: Wei Liu Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Dexuan Cui Cc: Long Li Cc: linux-hyperv@vger.kernel.org Cc: # v6.16+ Reviewed-by: Saurabh Sengar Link: https://patch.msgid.link/20260402092305.208728-2-tzimmermann@suse.de

Merge tag 'irq-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2026-04-14T17:02:41+00:00

Pull core irq updates from Thomas Gleixner: - Invoke add_interrupt_randomness() in handle_percpu_devid_irq() and cleanup the workaround in the Hyper-V driver, which would now invoke it twice on ARM64. Removing it from the driver requires to add it to the x86 system vector entry point - Remove the pointles cpu_read_lock() around reading CPU possible mask, which is read only after init - Add documentation for the interaction between device tree bindings and the interrupt type defines in irq.h - Delete stale defines in the matrix allocator and the equivalent in loongarch * tag 'irq-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Drivers: hv: Move add_interrupt_randomness() to hypervisor callback sysvec genirq/chip: Invoke add_interrupt_randomness() in handle_percpu_devid_irq() genirq/affinity: Remove cpus_read_lock() while reading cpu_possible_mask genirq/matrix, LoongArch: Delete IRQ_MATRIX_BITS leftovers genirq: Document interaction between and DT binding defines