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qemu: avoid launching non-x86 guests with 'pvspinlock' setting

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The 'pvspinlock' feature is x86 only. The "<pvspinlock/>" declaration
will always have a value 'on' or 'off', and both will break QEMU when
launching non-x86 guests. This is the error message for
"<pvspinlock state='on'/>" when running a ppc64 guest:

qemu-kvm: Expected key=value format, found +kvm_pv_unhalt

A similar error message is thrown for "<pvspinlock state='off'/>".

This patch prevents non-x86 guests from launching with any
pvspinlock setting with a more informative error message:

error: unsupported configuration: The 'pvspinlock' feature is not
supported for architecture 'ppc64' or machine type 'pseries'

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
This commit is contained in:
Daniel Henrique Barboza 2020-03-24 14:33:22 -03:00 committed by Andrea Bolognani
parent dbda73ff27
commit da7485c54e
1 changed files with 13 additions and 1 deletions
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14
src/qemu/qemu_domain.c
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@ -5271,13 +5271,25 @@ qemuDomainDefValidateFeatures(const virDomainDef *def,
}
break;
case VIR_DOMAIN_FEATURE_PVSPINLOCK:
if (def->features[i] != VIR_TRISTATE_SWITCH_ABSENT &&
!ARCH_IS_X86(def->os.arch)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("The '%s' feature is not supported for "
"architecture '%s' or machine type '%s'"),
featureName,
virArchToString(def->os.arch),
def->os.machine);
return -1;
}
break;
case VIR_DOMAIN_FEATURE_ACPI:
case VIR_DOMAIN_FEATURE_PAE:
case VIR_DOMAIN_FEATURE_HAP:
case VIR_DOMAIN_FEATURE_VIRIDIAN:
case VIR_DOMAIN_FEATURE_PRIVNET:
case VIR_DOMAIN_FEATURE_HYPERV:
case VIR_DOMAIN_FEATURE_PVSPINLOCK:
case VIR_DOMAIN_FEATURE_CAPABILITIES:
case VIR_DOMAIN_FEATURE_PMU:
case VIR_DOMAIN_FEATURE_MSRS: