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drm/amdgpu: Fix acquiring VM on large-BAR systems

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On large-BAR systems the VM page tables for compute are accessed by
the CPU. Always allow CPU access to the page directory so that it can
be used later by the CPU when a VM is converted to a compute VM.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Felix Kuehling 2018-03-23 15:30:35 -04:00 committed by Oded Gabbay
parent 374200b154
commit 810955ba71
1 changed files with 1 additions and 2 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -2406,8 +2406,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
if (vm->use_cpu_for_update)
flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
else
flags |= (AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
AMDGPU_GEM_CREATE_SHADOW);
flags |= AMDGPU_GEM_CREATE_SHADOW;
size = amdgpu_vm_bo_size(adev, adev->vm_manager.root_level);
r = amdgpu_bo_create(adev, size, align, AMDGPU_GEM_DOMAIN_VRAM, flags,