Re: [PATCH v3 4/4] drm/virtio: Support virtgpu exported resources

...

• if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_UUID)) {
  

•         vgdev->has_resource_assign_uuid = true;
  

• }
  

Just a question: this relies on DMA bufs so I assume it is not really assumed to work when DMA API is bypassed, right? Rather than worry what does it mean, how about just disabling this feature without PLATFORM_DMA for now?

By PLATFORM_DMA, do you mean CONFIG_DMA_SHARED_BUFFER? Virtio-gpu depends on DRM, which selects that feature. So I think DMA bufs should always be available when virtio-gpu is present.

-David