[Qemu-devel] [PATCH 3/3] virtio-gpu: Warn if UI config will disable virgl

[Cole Robinson <crobinso@redhat.com>]

Give users a hint if their config is wrong.

Signed-off-by: Cole Robinson <crobinso@redhat.com>
---
If virgl support is built into qemu, virgl=on is the default, so this
could be noisy in cases where people don't even care about virgl. So
I won't object if this is dropped.

The message also pops up once via make check, probably from
tests/display-vga-test.c , but doesn't cause a failure or anything.

Is there a way to check that user explicitly specified virgl= ?

 hw/display/virtio-gpu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index c181fb3..d3c567f 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -13,6 +13,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu-common.h"
+#include "qemu/error-report.h"
 #include "qemu/iov.h"
 #include "ui/console.h"
 #include "trace.h"
@@ -944,6 +945,10 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
     have_virgl = display_opengl;
 #endif
     if (!have_virgl) {
+        if (virtio_gpu_virgl_enabled(g->conf)) {
+            error_report("Display isn't configured for GL support. "
+                         "Disabling virgl");
+        }
         g->conf.flags &= ~(1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
     }
 
-- 
2.7.4