drm/amdgpu: Correctly use bo_va->ref_count in compute VMs

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This is needed to correctly handle BOs imported into compute VM from gfx.
Both kfd and gfx should use same bo_va and set bo_va->ref_count correctly
when map the Bos into same VM, otherwise we may trigger kernel general
protection when iterate mappings over bo_va's valids or invalids list.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Xiaogang Chen <Xiaogang.Chen@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Ramesh Errabolu <Ramesh.Errabolu@amd.com>
Tested-by: Xiaogang Chen <Xiaogang.Chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Xiaogang Chen 2023-10-12 15:48:06 -05:00 • committed by Alex Deucher

parent f20f3b0d6c

commit ffa88b0019

1 changed files with 11 additions and 3 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

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