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qemu: the actual change of default video devide type selection algorithm

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If a graphics device was added to XML that had no video device, libvirt
automatically added a video device which was always of type 'cirrus' on
x86_64, even if the underlying qemu didn't support cirrus.

This patch refines a bit the decision about the type of the video device.
Based on QEMU capabilities, cirrus is still preferred but only added if
QEMU supports it, otherwise VGA is used if supported by QEMU.  There is now
no fallback as libvirt only aspires to generate a basic working config and
leaves anything more specific up to higher-level management tools.

Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Pavel Mores <pmores@redhat.com>
This commit is contained in:
Pavel Mores 2019-11-25 11:54:25 +01:00 committed by Cole Robinson
parent 4a067e70fa
commit 33a9757852
1 changed files with 17 additions and 10 deletions
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27
src/qemu/qemu_domain.c
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@ -7881,25 +7881,32 @@ qemuDomainDeviceNetDefPostParse(virDomainNetDefPtr net,
static int
qemuDomainDefaultVideoDevice(const virDomainDef *def)
qemuDomainDefaultVideoDevice(const virDomainDef *def,
virQEMUCapsPtr qemuCaps)
{
if (ARCH_IS_PPC64(def->os.arch))
if (ARCH_IS_PPC64(def->os.arch)) {
return VIR_DOMAIN_VIDEO_TYPE_VGA;
else if (qemuDomainIsARMVirt(def) ||
qemuDomainIsRISCVVirt(def) ||
ARCH_IS_S390(def->os.arch))
} else if (qemuDomainIsARMVirt(def) ||
qemuDomainIsRISCVVirt(def) ||
ARCH_IS_S390(def->os.arch)) {
return VIR_DOMAIN_VIDEO_TYPE_VIRTIO;
else
return VIR_DOMAIN_VIDEO_TYPE_CIRRUS;
} else {
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_CIRRUS_VGA))
return VIR_DOMAIN_VIDEO_TYPE_CIRRUS;
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VGA))
return VIR_DOMAIN_VIDEO_TYPE_VGA;
return VIR_DOMAIN_VIDEO_TYPE_DEFAULT;
}
}
static int
qemuDomainDeviceVideoDefPostParse(virDomainVideoDefPtr video,
const virDomainDef *def)
const virDomainDef *def,
virQEMUCapsPtr qemuCaps)
{
if (video->type == VIR_DOMAIN_VIDEO_TYPE_DEFAULT)
video->type = qemuDomainDefaultVideoDevice(def);
video->type = qemuDomainDefaultVideoDevice(def, qemuCaps);
if (video->type == VIR_DOMAIN_VIDEO_TYPE_QXL &&
!video->vgamem) {
@ -7993,7 +8000,7 @@ qemuDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
break;
case VIR_DOMAIN_DEVICE_VIDEO:
ret = qemuDomainDeviceVideoDefPostParse(dev->data.video, def);
ret = qemuDomainDeviceVideoDefPostParse(dev->data.video, def, qemuCaps);
break;
case VIR_DOMAIN_DEVICE_PANIC: