Changes in gpu_buddy_test.c

4a57e0913e8c7fff407e97909f4ae48caa84d612 - Merge tag 'drm-next-2026-04-15' of https://gitlab.freedesktop.org/drm/kernel

Wed, 15 Apr 2026 17:45:00 +0200

Merge tag 'drm-next-2026-04-15' of https://gitlab.freedesktop.org/drm/kernelPull drm updates from Dave Airlie: "Highlights: - new DRM RAS infrastructure using netlink - amdgpu: enable DC on CIK APUs, and more IP enablement, and more user queue work - xe: purgeable BO support, and new hw enablement - dma-buf : add revocable operations Full summary: mm: - two-pass MMU interval notifiers - add gpu active/reclaim per-node stat counters math: - provide __KERNEL_DIV_ROUND_CLOSEST() in UAPI - implement DIV_ROUND_CLOSEST() with __KERNEL_DIV_ROUND_CLOSEST() rust: - shared tag with driver-core: register macro and io infra - core: rework DMA coherent API - core: add interop::list to interop with C linked lists - core: add more num::Bounded operations - core: enable generic_arg_infer and add EMSGSIZE - workqueue: add ARef support for work and delayed work - add GPU buddy allocator abstraction - add DRM shmem GEM helper abstraction - allow drm:::Device to dispatch work and delayed work items to driver private data - add dma_resv_lock helper and raw accessors core: - introduce DRM RAS infrastructure over netlink - add connector panel_type property - fourcc: add ARM interleaved 64k modifier - colorop: add destroy helper - suballoc: split into alloc and init helpers - mode: provide DRM_ARGB_GET*() macros for reading color components edid: - provide drm_output_color_Format dma-buf: - provide revoke mechanism for shared buffers - rename move_notify to invalidate_mappings - always enable move_notify - protect dma_fence_ops with RCU and improve locking - clean pages with helpers atomic: - allocate drm_private_state via callback - helper: use system_percpu_wq buddy: - make buddy allocator available to gpu level - add kernel-doc for buddy allocator - improve aligned allocation ttm: - fix fence signalling - improve tests and docs - improve handling of gfp_retry_mayfail - use per-node stat counters to track memory allocations - port pool to use list_lru - drop NUMA specific pools - make pool shrinker numa aware - track allocated pages per numa node coreboot: - cleanup coreboot framebuffer support sched: - fix race condition in drm_sched_fini pagemap: - enable THP support - pass pagemap_addr by reference gem-shmem: - Track page accessed/dirty status across mmap/vmap gpusvm: - reenable device to device migration - fix unbalanced unclock bridge: - anx7625: Support USB-C plus DT bindings - connector: Fix EDID detection - dw-hdmi-qp: Support Vendor-Specfic and SDP Infoframes; improve others - fsl-ldb: Fix visual artifacts plus related DT property 'enable-termination-resistor' - imx8qxp-pixel-link: Improve bridge reference handling - lt9611: Support Port-B-only input plus DT bindings - tda998x: Support DRM_BRIDGE_ATTACH_NO_CONNECTOR; Clean up - Support TH1520 HDMI plus DT bindings - waveshare-dsi: Fix register and attach; Support 1..4 DSI lanes plus DT bindings - anx7625: Fix USB Type-C handling - cdns-mhdp8546-core: Handle HDCP state in bridge atomic_check - Support Lontium LT8713SX DP MST bridge plus DT bindings - analogix_dp: Use DP helpers for link training panel: - panel-jdi-lt070me05000: Use mipi-dsi multi functions - panel-edp: Support Add AUO B116XAT04.1 (HW: 1A); Support CMN N116BCL-EAK (C2); Support FriendlyELEC plus DT changes - panel-edp: Fix timings for BOE NV140WUM-N64 - ilitek-ili9882t: Allow GPIO calls to sleep - jadard: Support TAIGUAN XTI05101-01A - lxd: Support LXD M9189A plus DT bindings - mantix: Fix pixel clock; Clean up - motorola: Support Motorola Atrix 4G and Droid X2 plus DT bindings - novatek: Support Novatek/Tianma NT37700F plus DT bindings - simple: Support EDT ET057023UDBA plus DT bindings; Support Powertip PH800480T032-ZHC19 plus DT bindings; Support Waveshare 13.3" - novatek-nt36672a: Use mipi_dsi_*_multi() functions - panel-edp: Support BOE NV153WUM-N42, CMN N153JCA-ELK, CSW MNF307QS3-2 - support Himax HX83121A plus DT bindings - support JuTouch JT070TM041 plus DT bindings - support Samsung S6E8FC0 plus DT bindings - himax-hx83102c: support Samsung S6E8FC0 plus DT bindings; support backlight - ili9806e: support Rocktech RK050HR345-CT106A plus DT bindings - simple: support Tianma TM050RDH03 plus DT bindings amdgpu: - enable DC by default on CIK APUs - userq fence ioctl param size fixes - set panel_type to OLED for eDP - refactor DC i2c code - FAMS2 update - rework ttm handling to allow multiple engines - DC DCE 6.x cleanup - DC support for NUTMEG/TRAVIS DP bridge - DCN 4.2 support - GC12 idle power fix for compute - use struct drm_edid in non-DC code - enable NV12/P010 support on primary planes - support newer IP discovery tables - VCN/JPEG 5.0.2 support - GC/MES 12.1 updates - USERQ fixes - add DC idle state manager - eDP DSC seamless boot amdkfd: - GC 12.1 updates - non 4K page fixes xe: - basic Xe3p_LPG and NVL-P enabling patches - allow VM_BIND decompress support - add purgeable buffer object support - add xe_vm_get_property_ioctl - restrict multi-lrc to VCS/VECS engines - allow disabling VM overcommit in fault mode - dGPU memory optimizations - Workaround cleanups and simplification - Allow VFs VRAM quote changes using sysfs - convert GT stats to per-cpu counters - pagefault refactors - enable multi-queue on xe3p_xpc - disable DCC on PTL - make MMIO communication more robust - disable D3Cold for BMG on specific platforms - vfio: improve FLR sync for Xe VFIO i915/display: - C10/C20/LT PHY PLL divider verification - use trans push mechanism to generate PSR frame change on LNL+ - refactor DP DSC slice config - VGA decode refactoring - refactor DPT, gen2-4 overlay, masked field register macro helpers - refactor stolen memory allocation decisions - prepare for UHBR DP tunnels - refactor LT PHY PLL to use DPLL framework - implement register polling/waiting in display code - add shared stepping header between i915 and display i915: - fix potential overflow of shmem scatterlist length nouveau: - provide Z cull info to userspace - initial GA100 support - shutdown on PCI device shutdown nova-core: - harden GSP command queue - add support for large RPCs - simplify GSP sequencer and message handling - refactor falcon firmware handling - convert to new register macro - conver to new DMA coherent API - use checked arithmetic - add debugfs support for gsp-rm log buffers - fix aux device registration for multi-GPU msm: - CI: - Uprev mesa - Restore CI jobs for Qualcomm APQ8016 and APQ8096 devices - Core: - Switched to of_get_available_child_by_name() - DPU: - Fixes for DSC panels - Fixed brownout because of the frequency / OPP mismatch - Quad pipe preparation (not enabled yet) - Switched to virtual planes by default - Dropped VBIF_NRT support - Added support for Eliza platform - Reworked alpha handling - Switched to correct CWB definitions on Eliza - Dropped dummy INTF_0 on MSM8953 - Corrected INTFs related to DP-MST - DP: - Removed debug prints looking into PHY internals - DSI: - Fixes for DSC panels - RGB101010 support - Support for SC8280XP - Moved PHY bindings from display/ to phy/ - GPU: - Preemption support for x2-85 and a840 - IFPC support for a840 - SKU detection support for x2-85 and a840 - Expose AQE support (VK ray-pipeline) - Avoid locking in VM_BIND fence signaling path - Fix to avoid reclaim in GPU snapshot path - Disallow foreign mapping of _NO_SHARE BOs - HDMI: - Fixed infoframes programming - MDP5: - Dropped support for MSM8974v1 - Dropped now unused code for MSM8974 v1 and SDM660 / MSM8998 panthor: - add tracepoints for power and IRQs - fix fence handling - extend timestamp query with flags - support various sources for timestamp queries tyr: - fix names and model/versions rockchip: - vop2: use drm logging function - rk3576 displayport support - support CRTC background color atmel-hlcdc: - support sana5d65 LCD controller tilcdc: - use DT bindings schema - use managed DRM interfaces - support DRM_BRIDGE_ATTACH_NO_CONNECTOR verisilicon: - support DC8200 + DT bindings virtgpu: - support PRIME import with 3D enabled komeda: - fix integer overflow in AFBC checks mcde: - improve bridge handling gma500: - use drm client buffer for fbdev framebuffer amdxdna: - add sensors ioctls - provide NPU power estimate - support column utilization sensor - allow forcing DMA through IOMMU IOVA - support per-BO mem usage queries - refactor GEM implementation ivpu: - update boot API to v3.29.4 - limit per-user number of doorbells/contexts - perform engine reset on TDR error loongson: - replace custom code with drm_gem_ttm_dumb_map_offset() imx: - support planes behind the primary plane - fix bus-format selection vkms: - support CRTC background color v3d: - improve handling of struct v3d_stats komeda: - support Arm China Linlon D6 plus DT bindings imagination: - improve power-off sequence - support context-reset notification from firmware mediatek: - mtk_dsi: enable hs clock during pre-enable - Remove all conflicting aperture devices during probe - Add support for mt8167 display blocks"* tag 'drm-next-2026-04-15' of https://gitlab.freedesktop.org/drm/kernel: (1735 commits) drm/ttm/tests: Remove checks from ttm_pool_free_no_dma_alloc drm/ttm/tests: fix lru_count ASSERT drm/vram: remove DRM_VRAM_MM_FILE_OPERATIONS from docs drm/fb-helper: Fix a locking bug in an error path dma-fence: correct kernel-doc function parameter @flags ttm/pool: track allocated_pages per numa node. ttm/pool: make pool shrinker NUMA aware (v2) ttm/pool: drop numa specific pools ttm/pool: port to list_lru. (v2) drm/ttm: use gpu mm stats to track gpu memory allocations. (v4) mm: add gpu active/reclaim per-node stat counters (v2) gpu: nova-core: fix missing colon in SEC2 boot debug message gpu: nova-core: vbios: use from_le_bytes() for PCI ROM header parsing gpu: nova-core: bitfield: fix broken Default implementation gpu: nova-core: falcon: pad firmware DMA object size to required block alignment gpu: nova-core: gsp: fix undefined behavior in command queue code drm/shmem_helper: Make sure PMD entries get the writeable upgrade accel/ivpu: Trigger recovery on TDR with OS scheduling drm/msm: Use of_get_available_child_by_name() dt-bindings: display/msm: move DSI PHY bindings to phy/ subdir ... List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

407f658eec69225d2bf3974b1ed63b0d88a25a6e - Merge tag 'drm-misc-next-2026-03-12' into drm-rust-next

Mon, 23 Mar 2026 18:26:44 +0100

Merge tag 'drm-misc-next-2026-03-12' into drm-rust-nextWe need the latest GPU buddy changes from drm-misc-next-2026-03-12 indrm-rust-next as well, as the Rust abstractions are built on top of it.Signed-off-by: Danilo Krummrich List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

9e63413827a8ea464249c0aa8046ac8fe7d9cc47 - Merge drm/drm-next into drm-xe-next

Thu, 19 Mar 2026 10:01:55 +0100

Merge drm/drm-next into drm-xe-nextBring in series "drm/{i915,xe}: sort out step enums between the drivers"that was merged through i915.Link: https://lore.kernel.org/all/cover.1772635152.git.jani.nikula@intel.comSigned-off-by: Thomas Hellström List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

d9a4a2021d4a5ced93b7d9a6d1b13298c631dbdd - Merge tag 'drm-misc-next-2026-03-12' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

Sat, 14 Mar 2026 22:53:05 +0100

Merge tag 'drm-misc-next-2026-03-12' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-nextdrm-misc-next for v7.1:UAPI Changes:amdxdna:- Add sensors ioctlsCross-subsystem Changes:dma-buf:- clean pages with helpersDocumenatation:- devicetree: Add lxd vendor prefixCore Changes:buddy:- improve aligned allocationsgem-shmem:- Track page accessed/dirty status across mmap/vmapttm:- fix fence signallingDriver Changes:amdxdna:- provide NPU power estimate- support sensor for column utilizationbridge:- anx7625: Fix USB Type-C handling- cdns-mhdp8546-core: Handle HDCP state in bridge atomic_checkivpu:- fixesloongson:- replace custom code with drm_gem_ttm_dumb_map_offset()mxsfb:- lcdif: report probing errors with dev_err_probe()panel:- ilitek-ili9882t: Allow GPIO calls to sleep- jadard: Support TAIGUAN XTI05101-01A- lxd: Support LXD M9189A plus DT bindings- mantix: Fix pixel clock; Clean up- motorola: Support Motorola Atrix 4G and Droid X2 plus DT bindings- novatek: Support Novatek/Tianma NT37700F plus DT bindings- renesas: Clean up- simple: Support EDT ET057023UDBA plus DT bindings; Support Powertip PH800480T032-ZHC19 plus DT bindings; Support Waveshare 13.3" - clean up DT bindings of various driverspanthor:- fix fence handlingvc4:- check return value of platform_get_irq_byname()Signed-off-by: Dave Airlie From: Thomas Zimmermann Link: https://patch.msgid.link/20260312075629.GA21234@linux.fritz.box List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

42d3b66d4cdbacfc9d120d2301b8de89cc29a914 - Merge drm/drm-next into drm-xe-next

Thu, 12 Mar 2026 15:17:56 +0100

Merge drm/drm-next into drm-xe-nextBackmerging to bring in 7.00-rc3. Important ahead GPU SVM merging THPsupport.Signed-off-by: Matthew Brost List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

bdca18a60ed7a332777c655d43bc99d0152b41c2 - gpu/tests/gpu_buddy: Add gpu_test_buddy_alloc_range for exact-range allocation

Mon, 02 Mar 2026 16:09:46 +0100

gpu/tests/gpu_buddy: Add gpu_test_buddy_alloc_range for exact-range allocationAdd a new kunit test gpu_test_buddy_alloc_range() that exercises the__gpu_buddy_alloc_range() exact-range allocation path, triggered whenstart + size == end with flags=0.The test covers:- Basic exact-range allocation of the full mm- Exact-range allocation of equal sub-ranges (quarters)- Minimum chunk-size exact ranges at start, middle, and end offsets- Non power-of-two mm size with multiple roots, including cross-root exact-range allocation- Randomized exact-range allocations of N contiguous page-aligned slices in random order- Negative: partially allocated range must reject overlapping exact alloc- Negative: checkerboard allocation pattern rejects exact range over partially occupied pairs- Negative: misaligned start, unaligned size, and out-of-bounds end- Free and re-allocate the same exact range across multiple iterations- Various power-of-two exact ranges at natural alignmentCc: Christian König Cc: Arunpravin Paneer Selvam Suggested-by: Matthew Auld Signed-off-by: Sanjay Yadav Reviewed-by: Matthew Auld Signed-off-by: Arunpravin Paneer Selvam Link: https://patch.msgid.link/20260302150947.47535-2-sanjay.kumar.yadav@intel.com List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

f5bd7da05a5988506dedcb3e67aecb3a13a4cdf0 - drm/buddy: Add KUnit test for offset-aligned allocations

Fri, 06 Mar 2026 07:01:55 +0100

drm/buddy: Add KUnit test for offset-aligned allocationsAdd KUnit test to validate offset-aligned allocations in the DRM buddyallocator.Validate offset-aligned allocation:The test covers allocations with sizes smaller than the alignment constraintand verifies correct size preservation, offset alignment, and behavior acrossmultiple allocation sizes. It also exercises fragmentation by freeingalternating blocks and confirms that allocation fails once all aligned offsetsare consumed.Stress subtree_max_alignment propagation:Exercise subtree_max_alignment tracking by allocating blocks with descendingalignment constraints and freeing them in reverse order. This verifies thatfree-tree augmentation correctly propagates the maximum offset alignmentpresent in each subtree at every stage.v2: - Move the patch to gpu/tests/gpu_buddy_test.c file.v3: - Fixed build warnings reported by kernel test robot v4:(Matthew) - Use IS_ALIGNED() instead of manual alignment checks - Simplify order iteration loop for readability - Remove extra newlineSigned-off-by: Arunpravin Paneer Selvam Reviewed-by: Matthew Auld Link: https://patch.msgid.link/20260306060155.2114-2-Arunpravin.PaneerSelvam@amd.com List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

5f0a63f81a027becb06a71406e0941c5d12e074d - Merge tag 'drm-misc-next-2026-03-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

Sun, 08 Mar 2026 21:06:57 +0100

Merge tag 'drm-misc-next-2026-03-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-nextdrm-misc-next for v7.1:Cross-subsystem Changes:dma-buf:- Prepare for compile-time concurrency analysisCore Changes:buddy:- Improve assert testingsched:- Fix race condition in drm_sched_fini()- Mark slow testsDriver Changes:bridge:- waveshare-dsi: Fix register and attach; Support 1..4 DSI lanes plus DT bindingsgma500:- Use DRM client buffer for fbdev framebuffergud:- Test for imported buffers with helperimagination:- Fix power domain handlingivpu:- Update boot API to v3.29.4- Limit per-user number of doorbells and contextsnouveau:- Test for imported buffers with helperpanel:- panel-edp: Fix timings for BOE NV140WUM-N64panfrost:- Test for imported buffers with helperpanthor:- Test for imported buffers with helpervc4:- Test for imported buffers with helperSigned-off-by: Dave Airlie From: Thomas Zimmermann Link: https://patch.msgid.link/20260305081140.GA171266@linux.fritz.box List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

21f6bcdf2be72e750dbe430b7227a66763a58466 - Merge tag 'drm-misc-next-2026-02-26' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

Mon, 02 Mar 2026 07:57:26 +0100

Merge tag 'drm-misc-next-2026-02-26' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-nextdrm-misc-next for v7.1:UAPI Changes:connector:- Add panel_type propertyfourcc:- Add ARM interleaved 64k modifiernouveau:- Query Z-Cull info with DRM_IOCTL_NOUVEAU_GET_ZCULL_INFOCross-subsystem Changes:coreboot:- Clean up coreboot framebuffer supportdma-buf:- Provide revoke mechanism for shared buffers- Rename move_notify callback to invalidate_mappings and update users.- Always enable move_notify- Support dma_fence_was_initialized() test- Protect dma_fence_ops by RCU and improve locking- Fix sparse warningsCore Changes:atomic:- Allocate drm_private_state via callback and convert driversatomic-helper:- Use system_percpu_wqbuddy:- Make buddy allocator available to all DRM drivers- Document flags and structurescolorop:- Add destroy helper and convert driversfbdev-emulation:- Clean upgem:- Fix drm_gem_objects_lookup() error cleanupDriver Changes:amdgpu:- Set panel_type to OELD for eDPatmel-hlcdc:- Support sana5d65 LCD controllerbridge:- anx7625: Support USB-C plus DT bindings- connector: Fix EDID detection- dw-hdmi-qp: Support Vendor-Specfic and SDP Infoframes; improve others- fsl-ldb: Fix visual artifacts plus related DT property 'enable-termination-resistor'- imx8qxp-pixel-link: Improve bridge reference handling- lt9611: Support Port-B-only input plus DT bindings- tda998x: Support DRM_BRIDGE_ATTACH_NO_CONNECTOR; Clean up- Support TH1520 HDMI plus DT bindings- Clean upimagination:- Clean upkomeda:- Fix integer overflow in AFBC checksmcde:- Improve bridge handlingnouveau:- Provide Z-cull info to user space- gsp: Support GA100- Shutdown on PCI device shutdown- Clean uppanel:- panel-jdi-lt070me05000: Use mipi-dsi multi functions- panel-edp: Support Add AUO B116XAT04.1 (HW: 1A); Support CMN N116BCL-EAK (C2); Support FriendlyELEC plus DT changes- Fix Kconfig dependenciespanthor:- Add tracepoints for power and IRQsrcar-du:- dsi: fix VCLK calculationrockchip:- vop2: Use drm_ logging functions- Support DisplayPort on RK3576sysfb:- corebootdrm: Support system framebuffer on coreboot firmware; detect orientation- Clean up pixel-format lookupsun4i:- Clean uptilcdc:- Use DT bindings scheme- Use managed DRM interfaces- Support DRM_BRIDGE_ATTACH_NO_CONNECTOR- Clean up a lot of obsolete codev3d:- Clean upvc4:- Use system_percpu_wq- Clean upverisilicon:- Support DC8200 plus DT bindingsvirtgpu:- Support PRIME imports with enabled 3DSigned-off-by: Dave Airlie From: Thomas Zimmermann Link: https://patch.msgid.link/20260226143615.GA47200@linux.fritz.box List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

5ea5b6ff0d63aef1dc3fb25445acea183f61a934 - drm/tests: Mark slow tests as slow

Tue, 24 Feb 2026 12:03:10 +0100

drm/tests: Mark slow tests as slowSome DRM tests cross the 1s execution time threshold that defines a testas slow. Let's flag them as such.Reviewed-by: Arunpravin Paneer Selvam Reviewed-by: Tvrtko Ursulin Reviewed-by: Thomas Zimmermann Link: https://patch.msgid.link/20260224110310.1854608-1-mripard@kernel.orgSigned-off-by: Maxime Ripard List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

ba110db8e1bc206c13fd7d985e79b033f53bfdea - gpu: Move DRM buddy allocator one level up (part two)

Thu, 05 Feb 2026 23:52:38 +0100

gpu: Move DRM buddy allocator one level up (part two)Move the DRM buddy allocator one level up so that it can be used by GPUdrivers (example, nova-core) that have usecases other than DRM (such asVFIO vGPU support). Modify the API, structures and Kconfigs to use"gpu_buddy" terminology. Adapt the drivers and tests to use the new API.The commit cannot be split due to bisectability, however no functionalchange is intended. Verified by running K-UNIT tests and build testedvarious configurations.Signed-off-by: Joel Fernandes Reviewed-by: Dave Airlie [airlied: I've split this into two so git can find copies easier.I've also just nuked drm_random library, that stuff needs to be doneelsewhere and only the buddy tests seem to be using it].Signed-off-by: Dave Airlie List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c

4a9671a03f2be13acde0cb15c5208767a9cc56e4 - gpu: Move DRM buddy allocator one level up (part one)

Thu, 05 Feb 2026 23:52:38 +0100

gpu: Move DRM buddy allocator one level up (part one)Move the DRM buddy allocator one level up so that it can be used by GPUdrivers (example, nova-core) that have usecases other than DRM (such asVFIO vGPU support). Modify the API, structures and Kconfigs to use"gpu_buddy" terminology. Adapt the drivers and tests to use the new API.The commit cannot be split due to bisectability, however no functionalchange is intended. Verified by running K-UNIT tests and build testedvarious configurations.Signed-off-by: Joel Fernandes Reviewed-by: Dave Airlie [airlied: I've split this into two so git can find copies easier.I've also just nuked drm_random library, that stuff needs to be doneelsewhere and only the buddy tests seem to be using it].Signed-off-by: Dave Airlie List of files: /linux/drivers/gpu/tests/gpu_buddy_test.c