VIRTIO_GPU_FLAG_FENCE
s.req.flags = htole32(VIRTIO_GPU_FLAG_FENCE);
s.req.hdr.flags = htole32(VIRTIO_GPU_FLAG_FENCE);
s.req.backing.hdr.flags = htole32(VIRTIO_GPU_FLAG_FENCE);
s.req.hdr.flags = htole32(VIRTIO_GPU_FLAG_FENCE);
s.req.hdr.flags = htole32(VIRTIO_GPU_FLAG_FENCE);
s.req.hdr.flags = htole32(VIRTIO_GPU_FLAG_FENCE);