amdgpu_vm_pt_level_shift
shift = amdgpu_vm_pt_level_shift(adev, cursor->level);
shift = amdgpu_vm_pt_level_shift(adev, cursor->level - 1);
shift = amdgpu_vm_pt_level_shift(adev, adev->vm_manager.root_level);
shift = amdgpu_vm_pt_level_shift(adev, cursor.level);
parent_shift = amdgpu_vm_pt_level_shift(adev, cursor.level - 1);