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kernel/linux

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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 GPU drivers (example, nova-core) that have usecases other than DRM (such as VFIO 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 functional change is intended. Verified by running K-UNIT tests and build tested various configurations. Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com> Reviewed-by: Dave Airlie <airlied@redhat.com> [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 done elsewhere and only the buddy tests seem to be using it]. Signed-off-by: Dave Airlie <airlied@redhat.com> 2026-02-06 08:52:38 +10:00








gpu: Fix dependencies in CONFIG_GPU_BUDDY_KUNIT_TEST CONFIG_GPU_BUDDY is currently not selectable by the user, mirroring how CONFIG_DRM_BUDDY does it - the idea is for a driver that makes use of it to include a "select GPU_BUDDY" line in its kconfig. CONFIG_DRM_BUDDY is also selected when building with CONFIG_DRM_KUNIT_TEST, as it can be thought of as building a mock "driver" running the tests, that makes use of the buddy functionality. CONFIG_GPU_BUDDY_KUNIT_TEST doesn't follow that logic, requiring GPU_BUDDY to be selected already instead of selecting it itself. This requires building the test kernel with another driver that uses DRM_BUDDY, as this is currently the only kconfig option that selects GPU_BUDDY. That shouldn't be required to run unit tests for a module now completely independent from DRM, let alone any specific driver. Fix the dependency declaration in CONFIG_GPU_BUDDY_KUNIT_TEST to make it work as intended, mirroring the setup in CONFIG_DRM_KUNIT_TEST. Signed-off-by: Krzysztof Niemiec <krzysztof.niemiec@intel.com> Reviewed-by: Sebastian Brzezinka <sebastian.brzezinka@intel.com> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com> Link: https://patch.msgid.link/20260729091816.27860-3-krzysztof.niemiec@intel.com Signed-off-by: Maarten Lankhorst <dev@lankhorst.se> 2026-07-29 11:18:16 +02:00

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 GPU drivers (example, nova-core) that have usecases other than DRM (such as VFIO 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 functional change is intended. Verified by running K-UNIT tests and build tested various configurations. Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com> Reviewed-by: Dave Airlie <airlied@redhat.com> [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 done elsewhere and only the buddy tests seem to be using it]. Signed-off-by: Dave Airlie <airlied@redhat.com> 2026-02-06 08:52:38 +10:00