From: Thomas Hellstrom <thellstrom@xxxxxxxxxx> TTM doesn't yet fully support mapping of DMA memory when SEV is active, so in that case, refuse DMA operation. For guest-backed object operation this means 3D acceleration will be disabled. For host-backed, VRAM will be used for data transfer between the guest and the device. Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx> Reviewed-by: Brian Paul <brianp@xxxxxxxxxx> --- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index f2ec3155468d..4f58364421ce 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -29,6 +29,7 @@ #include <linux/dma-mapping.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/mem_encrypt.h> #include <drm/drm_drv.h> #include <drm/drm_ioctl.h> @@ -575,6 +576,10 @@ 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 (mem_encrypt_active()) + return -EINVAL; + if (vmw_force_coherent) dev_priv->map_mode = vmw_dma_alloc_coherent; else if (vmw_restrict_iommu) -- 2.21.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
