diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index d5a419776e93..487aded99fd9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -200,7 +200,8 @@ static int amdgpu_ttm_map_buffer(struct amdgpu_ttm_buffer_entity *entity,
 				 struct ttm_resource *mem,
 				 struct amdgpu_res_cursor *mm_cur,
 				 unsigned int window,
-				 bool tmz, uint64_t *size, uint64_t *addr)
+				 bool tmz, uint64_t *size, uint64_t *addr,
+				 bool readonly)
 {
 	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 	unsigned int offset, num_pages, num_dw, num_bytes;
@@ -262,6 +263,8 @@ static int amdgpu_ttm_map_buffer(struct amdgpu_ttm_buffer_entity *entity,
 	flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, mem);
 	if (tmz)
 		flags |= AMDGPU_PTE_TMZ;
+	if (readonly)
+		flags &= ~AMDGPU_PTE_WRITEABLE;
 
 	cpu_addr = &job->ibs[0].ptr[num_dw];
 
@@ -331,12 +334,12 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
 
 		/* Map src to window 0 and dst to window 1. */
 		r = amdgpu_ttm_map_buffer(entity, src->bo, src->mem, &src_mm,
-					  0, tmz, &cur_size, &from);
+					  0, tmz, &cur_size, &from, true);
 		if (r)
 			goto error;
 
 		r = amdgpu_ttm_map_buffer(entity, dst->bo, dst->mem, &dst_mm,
-					  1, tmz, &cur_size, &to);
+					  1, tmz, &cur_size, &to, false);
 		if (r)
 			goto error;
 
@@ -2646,7 +2649,7 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_ttm_buffer_entity *entity,
 		cur_size = min(dst.size, 256ULL << 20);
 
 		r = amdgpu_ttm_map_buffer(entity, &bo->tbo, bo->tbo.resource, &dst,
-					  0, false, &cur_size, &to);
+					  0, false, &cur_size, &to, false);
 		if (r)
 			goto error;