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qemu: refactor qemuBuildIOMMUCommandLine

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Introduce a separate buffer for options and use a helper
variable for def->iommu.
This commit is contained in:
Ján Tomko 2017-03-21 10:27:34 +01:00
parent 4ae59411fa
commit b595cc05e8
1 changed files with 15 additions and 6 deletions
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21
src/qemu/qemu_command.c
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@ -6674,33 +6674,42 @@ qemuBuildIOMMUCommandLine(virCommandPtr cmd,
const virDomainDef *def,
virQEMUCapsPtr qemuCaps)
{
if (!def->iommu)
virBuffer opts = VIR_BUFFER_INITIALIZER;
const virDomainIOMMUDef *iommu = def->iommu;
int ret = -1;
if (!iommu)
return 0;
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_MACHINE_IOMMU))
return 0; /* Already handled via -machine */
switch (def->iommu->model) {
switch (iommu->model) {
case VIR_DOMAIN_IOMMU_MODEL_INTEL:
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_INTEL_IOMMU)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("IOMMU device: '%s' is not supported with "
"this QEMU binary"),
virDomainIOMMUModelTypeToString(def->iommu->model));
virDomainIOMMUModelTypeToString(iommu->model));
return -1;
}
if (!qemuDomainMachineIsQ35(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("IOMMU device: '%s' is only supported with "
"Q35 machines"),
virDomainIOMMUModelTypeToString(def->iommu->model));
virDomainIOMMUModelTypeToString(iommu->model));
return -1;
}
virCommandAddArgList(cmd, "-device", "intel-iommu", NULL);
virBufferAddLit(&opts, "intel-iommu");
case VIR_DOMAIN_IOMMU_MODEL_LAST:
break;
}
return 0;
virCommandAddArg(cmd, "-device");
virCommandAddArgBuffer(cmd, &opts);
ret = 0;
virBufferFreeAndReset(&opts);
return ret;
}