diff options
| author | Thomas Hellstrom <thellstrom@vmware.com> | 2020-01-15 21:48:19 +0100 |
|---|---|---|
| committer | Thomas Hellstrom <thellstrom@vmware.com> | 2020-03-12 12:00:07 +0100 |
| commit | 3b0d6458c7052af1795489976b600797ca07f7e9 (patch) | |
| tree | 01bcc6780edc6190a9e853b3af4555dcb58e3cd7 /drivers/gpu/drm/vmwgfx | |
| parent | 81a00960d3fa83bbff9939ff52e89f0b74801937 (diff) | |
drm/vmwgfx: Refuse DMA operation when SEV encryption is active
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@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Diffstat (limited to 'drivers/gpu/drm/vmwgfx')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 5 |
1 files changed, 5 insertions, 0 deletions
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) |