The udmabuf usage is mandatory when virgl is disabled and blobs feature
enabled in the Qemu machine configuration. If virgl and blobs are enabled,
then udmabuf requirement is optional. Since udmabuf isn't widely supported
by a popular Linux distros today, let's relax the udmabuf requirement for
blobs=on,virgl=on. Now, a full-featured virtio-gpu acceleration is
available to Qemu users without a need to have udmabuf available in the
system.

Reviewed-by: Antonio Caggiano <antonio.caggiano@collabora.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Antonio Caggiano <quic_acaggian@quicinc.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 hw/display/virtio-gpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index ae831b6b3e3e..dac272ecadb1 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1472,6 +1472,7 @@ void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
 
     if (virtio_gpu_blob_enabled(g->parent_obj.conf)) {
         if (!virtio_gpu_rutabaga_enabled(g->parent_obj.conf) &&
+            !virtio_gpu_virgl_enabled(g->parent_obj.conf) &&
             !virtio_gpu_have_udmabuf()) {
             error_setg(errp, "need rutabaga or udmabuf for blob resources");
             return;
-- 
2.44.0