virtio-gpu is 2D. virgl is an extension mode for 3D rendering offload. TIL virtio is properly standardized: https://docs.oasis-open.org/virtio/virtio/v1.2/virtio-v1.2.h... The new OpenBSD driver seems to reflect (directly or indirectly) an earlier revision: https://docs.oasis-open.org/virtio/virtio/v1.1/virtio-v1.1.h...