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qemu: explicitly disable virgl when requested

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If a domain is configured to have an egl-headless display and a virtio
video device, virgl will be enabled automatically within the guest, even
if the video device is configured with accel3d='no'.

In this case we should explicitly pass 'virgl=off' to qemu.

See https://bugzilla.redhat.com/show_bug.cgi?id=1791236 for more
information.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Jonathon Jongsma 2020-01-24 17:12:26 -06:00 committed by Michal Privoznik
parent 51489b8419
commit dee2218bc8
1 changed files with 4 additions and 1 deletions
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5
src/qemu/qemu_command.c
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@ -4429,7 +4429,10 @@ qemuBuildDeviceVideoStr(const virDomainDef *def,
if (video->backend != VIR_DOMAIN_VIDEO_BACKEND_TYPE_VHOSTUSER &&
video->type == VIR_DOMAIN_VIDEO_TYPE_VIRTIO) {
if (video->accel && video->accel->accel3d == VIR_TRISTATE_SWITCH_ON) {
if (video->accel &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_GPU_VIRGL) &&
(video->accel->accel3d == VIR_TRISTATE_SWITCH_ON ||
video->accel->accel3d == VIR_TRISTATE_SWITCH_OFF)) {
virBufferAsprintf(&buf, ",virgl=%s",
virTristateSwitchTypeToString(video->accel->accel3d));
}