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-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_drv.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 9d7a1b710..53f63ad65 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -663,11 +663,12 @@ static int vmw_dma_select_mode(struct vmw_private *dev_priv)
[vmw_dma_map_populate] = "Caching DMA mappings.",
[vmw_dma_map_bind] = "Giving up DMA mappings early."};
- /* TTM currently doesn't fully support SEV encryption. */
- if (cc_platform_has(CC_ATTR_MEM_ENCRYPT))
- return -EINVAL;
-
- if (vmw_force_coherent)
+ /*
+ * When running with SEV we always want dma mappings, because
+ * otherwise ttm tt pool pages will bounce through swiotlb running
+ * out of available space.
+ */
+ if (vmw_force_coherent || cc_platform_has(CC_ATTR_MEM_ENCRYPT))
dev_priv->map_mode = vmw_dma_alloc_coherent;
else if (vmw_restrict_iommu)
dev_priv->map_mode = vmw_dma_map_bind;