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conf: Check IOMMU for unsupported attributes

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Currently, it's possible to pass various attributes to an IOMMU's
<driver/> element hoping that we enable them in underlying
hypervisor. However, depending on the IOMMU model, some of these
attributes can't be enabled and are simply ignored. This is
suboptimal and we should reject such configuration in the
validate phase.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2101633
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Michal Privoznik 2022-07-08 11:33:02 +02:00
parent 79ff7b2d8e
commit c5bc752666
1 changed files with 25 additions and 1 deletions
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26
src/conf/domain_validate.c
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@ -2632,8 +2632,20 @@ static int
virDomainIOMMUDefValidate(const virDomainIOMMUDef *iommu)
{
switch (iommu->model) {
case VIR_DOMAIN_IOMMU_MODEL_INTEL:
case VIR_DOMAIN_IOMMU_MODEL_SMMUV3:
if (iommu->intremap != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->caching_mode != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->eim != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->iotlb != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->aw_bits != 0) {
virReportError(VIR_ERR_XML_ERROR,
_("iommu model '%s' doesn't support additional attributes"),
virDomainIOMMUModelTypeToString(iommu->model));
return -1;
}
G_GNUC_FALLTHROUGH;
case VIR_DOMAIN_IOMMU_MODEL_INTEL:
if (iommu->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) {
virReportError(VIR_ERR_XML_ERROR,
_("iommu model '%s' can't have address"),
@ -2643,6 +2655,18 @@ virDomainIOMMUDefValidate(const virDomainIOMMUDef *iommu)
break;
case VIR_DOMAIN_IOMMU_MODEL_VIRTIO:
if (iommu->intremap != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->caching_mode != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->eim != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->iotlb != VIR_TRISTATE_SWITCH_ABSENT ||
iommu->aw_bits != 0) {
virReportError(VIR_ERR_XML_ERROR,
_("iommu model '%s' doesn't support additional attributes"),
virDomainIOMMUModelTypeToString(iommu->model));
return -1;
}
break;
case VIR_DOMAIN_IOMMU_MODEL_LAST:
break;
}