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

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>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index cbf1421c19630a47eb0885634d8f317ef930a997..da55a78d7380bdd0da7ce9120bb0f4bf9f460ffe 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -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,