kernel/linux.git/drivers/gpu/drm/drm_gpuvm.c, branch v7.2-rc1

Merge tag 'drm-rust-next-2026-06-04' of https://gitlab.freedesktop.org/drm/rust/kernel into drm-next

2026-06-04T23:13:12+00:00

DRM Rust changes for v7.2-rc1 - Driver Core (shared via signed tag dd-lifetimes-7.2-rc1): - Introduce Higher-Ranked Lifetime Types (HRT) for Rust device drivers, allowing driver structs to hold device resources like pci::Bar and IoMem directly with a lifetime tied to the binding scope, removing the need for Devres indirection and ARef. - Replace drvdata() with scoped registration data on the auxiliary bus, using the new ForLt trait to thread lifetimes through registrations. Remove drvdata() and driver_type. - DRM: - Add GPUVM immediate mode abstraction for Rust GPU drivers: - In immediate mode, GPU virtual address space state is updated during job execution (in the DMA fence signalling critical path), keeping the GPUVM and the GPU's address space always in sync. - Provide GpuVm, GpuVa, and GpuVmBo types for managing address spaces, virtual mappings, and GEM object backing respectively. - Provide split-merge map/unmap operations that handle partial overlaps with existing mappings. - drm_exec integration for dma_resv locking and GEM object validation based on the external/evicted object lists are not yet covered and planned as follow-up work. - Introduce DeviceContext type state for drm::Device, allowing drivers to restrict operations to contexts where the device is guaranteed to be registered (or not yet registered) with userspace. - Add FEAT_RENDER flag to the Driver trait for render node support. - Nova: - Hopper/Blackwell enablement: - Add GPU identification and architecture-based HAL selection for Hopper (GH100) and Blackwell (GB100, GB202). - Implement the FSP (Foundation Security Processor) boot path used by Hopper and Blackwell, including FSP falcon engine support, EMEM operations, MCTP/NVDM message infrastructure, and FSP Chain of Trust boot with GSP lockdown release. - Add support for 32-bit firmware images and auto-detection of firmware image format. - Add architecture-specific framebuffer, sysmem flush, PCI config mirror, DMA mask, and WPR/non-WPR heap sizing. - GSP boot and unload: - Refactor the GSP boot process into a chipset-specific HAL, keeping the SEC2 and FSP boot paths separated cleanly. - Implement proper driver unload: send UNLOADING_GUEST_DRIVER command, run Booter Unloader and FWSEC-SB upon unbinding, and run the unload bundle on Gsp::boot() failure. This removes the need for a manual GPU reset between driver unbind and re-probe. - GA100 support: - Add support for the GA100 GPU, including IFR header detection and skipping, correct fwsignature selection, conditional FRTS boot, and documentation of the IFR header layout. - VBIOS hardening and refactoring: - Harden VBIOS parsing with checked arithmetic, bounds-checked accesses, and FromBytes-based structure reads throughout the FWSEC and Falcon data paths. Simplify the overall VBIOS module structure. - HRT adoption: - Use lifetime-parameterized pci::Bar directly, replacing the Arc> indirection. Replace ARef with &'bound Device in SysmemFlush and the GSP sequencer. Separate the driver type from driver data. - Misc: - Rename module names to kebab-case (nova-drm, nova-core). - Require little-endian in Kconfig, making the existing assumption explicit. - Tyr: - Define comprehensive typed register blocks for GPU_CONTROL, JOB_CONTROL, MMU_CONTROL (including per-address-space registers), and DOORBELL_BLOCK using the kernel register!() macro. This replaces manual bit manipulation with typed register and field accessors. - Add shmem-backed GEM objects and set DMA mask based on GPU physical address width. - Adopt HRT: separate driver type from driver data, and use IoMem directly instead of Devres for register access during probe. - Move clock cleanup into a Drop implementation. Signed-off-by: Dave Airlie From: "Danilo Krummrich" Link: https://patch.msgid.link/DJ0IF39U9ETK.PCCUO7ZEQ4S0@kernel.org

Merge remote-tracking branch 'drm/drm-next' into drm-rust-next

2026-05-28T19:48:11+00:00

Backmerge to pull in commit 838d852da850 ("rust: allow `clippy::collapsible_match` globally"), in order to get rid of spurious warnings messing with developer tooling. Signed-off-by: Danilo Krummrich

drm/exec: Remove the index parameter from drm_exec_for_each_locked_obj[_reverse]

2026-05-25T08:45:38+00:00

Nobody makes any use of it. Possible internal future users can instead use the _index variable. External users shouldn't use it since the array it's pointing into is internal drm_exec state. v2: - Use a unique id for the loop variable (Christian) Assisted-by: GitHub Copilot:claude-sonnet-4.6 Signed-off-by: Thomas Hellström Reviewed-by: Christian König Link: https://patch.msgid.link/20260520101616.41284-2-thomas.hellstrom@linux.intel.com

drm/gpuvm: take refcount on DRM device

2026-05-05T10:49:41+00:00

Currently GPUVM relies on the owner implicitly holding a refcount to the drm device, and it does not implicitly take a refcount on the drm device. This design is error-prone, so take a refcount on the device. Suggested-by: Danilo Krummrich Signed-off-by: Alice Ryhl Fixes: 546ca4d35dcc ("drm/gpuvm: convert WARN() to drm_WARN() variants") Link: https://patch.msgid.link/20260416-gpuvm-drm-dev-get-v1-1-f3bc06571e73@google.com Signed-off-by: Danilo Krummrich

drm/gpuvm: Do not prepare NULL objects

2026-04-16T18:27:17+00:00

Statis analysis issue: drm_gpuvm_prepare_range issues an exec_object_prepare call to all drm_gem_objects mapped between addr and addr + range. However, it is possible (albeit very unlikely) that the objects found through drm_gpuvm_for_each_va_range (as connected to va->gem) are NULL, as seen in other functions such as drm_gpuva_link and drm_gpuva_unlink_defer. Do not prepare NULL objects. Fixes: 50c1a36f594b ("drm/gpuvm: track/lock/validate external/evicted objects") Signed-off-by: Jonathan Cavitt Cc: Matthew Brost Cc: Thomas Hellström Reviewed-by: Krzysztof Karas Link: https://patch.msgid.link/20260130191953.61718-2-jonathan.cavitt@intel.com

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

BackMerge tag 'v6.19-rc7' into drm-next

2026-01-28T02:44:28+00:00

Linux 6.19-rc7 This is needed for msm and rust trees. Signed-off-by: Dave Airlie

drm/gpuvm: fix name in kernel doc of drm_gpuvm_bo_obtain_locked()

2026-01-09T16:22:04+00:00

When renaming this function, the name in the docs was not updated. This causes a KernelDoc warning. Thus, fix it. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202601091113.0b0WuRML-lkp@intel.com/ Fixes: 9bf4ca1e699c ("drm/gpuvm: drm_gpuvm_bo_obtain() requires lock and staged mode") Signed-off-by: Alice Ryhl Link: https://patch.msgid.link/20260109082019.3999814-1-aliceryhl@google.com Signed-off-by: Danilo Krummrich

drm/gpuvm: use const for drm_gpuva_op_* ptrs

2026-01-08T17:06:56+00:00

These methods just read the values stored in the op pointers without modifying them, so it is appropriate to use const ptrs here. This allows us to avoid const -> mut pointer casts in Rust. Reviewed-by: Boris Brezillon Signed-off-by: Alice Ryhl Link: https://patch.msgid.link/20260108-gpuvm-rust-v2-3-dbd014005a0b@google.com Signed-off-by: Danilo Krummrich