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qemu: Add KVM CPUs into cache only if KVM is present

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virQEMUCapsFormatCache/virQEMUCapsLoadCache adds/reads KVM CPUs to/from
capabilities cache regardless of QEMU_CAPS_KVM. That can cause undesired
side-effects when KVM CPUs are present in the cache on a platform that
doesn't support it, e.g. macOS or Linux without KVM support.

Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Tested-by: Brad Laue <brad@brad-x.com>
Tested-by: Christophe Fergeau <cfergeau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Roman Bolshakov 2018-11-21 21:45:02 +03:00 committed by Andrea Bolognani
parent 8885cd9a76
commit 4794458c8d
1 changed files with 11 additions and 5 deletions
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16
src/qemu/qemu_capabilities.c
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@ -4411,8 +4411,11 @@ virQEMUCapsLoadCache(virArch hostArch,
return -1;
}
if (virQEMUCapsLoadAccel(qemuCaps, ctxt, VIR_DOMAIN_VIRT_KVM) < 0 ||
virQEMUCapsLoadAccel(qemuCaps, ctxt, VIR_DOMAIN_VIRT_QEMU) < 0)
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM) &&
virQEMUCapsLoadAccel(qemuCaps, ctxt, VIR_DOMAIN_VIRT_KVM) < 0) {
return -1;
}
if (virQEMUCapsLoadAccel(qemuCaps, ctxt, VIR_DOMAIN_VIRT_QEMU) < 0)
return -1;
if (virQEMUCapsParseGIC(qemuCaps, ctxt) < 0)
@ -4421,7 +4424,8 @@ virQEMUCapsLoadCache(virArch hostArch,
if (virQEMUCapsParseSEVInfo(qemuCaps, ctxt) < 0)
return -1;
virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_KVM);
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM))
virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_KVM);
virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_QEMU);
if (virXPathBoolean("boolean(./kvmSupportsNesting)", ctxt) > 0)
@ -4654,7 +4658,8 @@ virQEMUCapsFormatCache(virQEMUCaps *qemuCaps)
virBufferAsprintf(&buf, "<arch>%s</arch>\n",
virArchToString(qemuCaps->arch));
virQEMUCapsFormatAccel(qemuCaps, &buf, VIR_DOMAIN_VIRT_KVM);
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM))
virQEMUCapsFormatAccel(qemuCaps, &buf, VIR_DOMAIN_VIRT_KVM);
virQEMUCapsFormatAccel(qemuCaps, &buf, VIR_DOMAIN_VIRT_QEMU);
for (i = 0; i < qemuCaps->ngicCapabilities; i++) {
@ -5508,7 +5513,8 @@ virQEMUCapsNewForBinaryInternal(virArch hostArch,
qemuCaps->libvirtCtime = virGetSelfLastChanged();
qemuCaps->libvirtVersion = LIBVIR_VERSION_NUMBER;
virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_KVM);
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM))
virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_KVM);
virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_QEMU);
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM)) {