[QEMU PATCH v4 08/13] virtio-gpu: Don't require udmabuf when blobs and virgl are enabled

[Huang Rui <ray.huang@amd.com>]

From: Dmitry Osipenko <dmitry.osipenko@collabora.com>

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: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
---

New patch

 hw/display/virtio-gpu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index a66cbd9930..5b7a7eab4f 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1361,7 +1361,8 @@ void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
     VirtIOGPU *g = VIRTIO_GPU(qdev);
 
     if (virtio_gpu_blob_enabled(g->parent_obj.conf)) {
-        if (!virtio_gpu_have_udmabuf()) {
+        if (!virtio_gpu_virgl_enabled(g->parent_obj.conf) &&
+            !virtio_gpu_have_udmabuf()) {
             error_setg(errp, "cannot enable blob resources without udmabuf");
             return;
         }
-- 
2.34.1