[libvirt] [RFC PATCH 11/12] qemu: Use multiple PHBs for pSeries guests
Additional PHBs (pci-root controllers) will be created for
the guest using the spapr-pci-host-bridge QEMU device, if
available; the implicit default PHB, while present in the
guest configuration, will be skipped.
---
src/qemu/qemu_command.c | 47 ++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 44 insertions(+), 3 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 462a598..412a918 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -2940,6 +2940,40 @@ qemuBuildControllerDevStr(const virDomainDef *domainDef,
def->opts.pciopts.numaNode);
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT:
+ if (def->opts.pciopts.modelName ==
VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_NONE ||
+ def->opts.pciopts.idx == -1) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("autogenerated pci-root options not set"));
+ goto error;
+ }
+
+ /* Skip the implicit one */
+ if (def->opts.pciopts.idx == 0)
+ goto done;
+
+ modelName =
virDomainControllerPCIModelNameTypeToString(def->opts.pciopts.modelName);
+ if (!modelName) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("unknown pci-root model name value %d"),
+ def->opts.pciopts.modelName);
+ goto error;
+ }
+ if (def->opts.pciopts.modelName !=
VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_SPAPR_PCI_HOST_BRIDGE) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("PCI controller model name '%s' is not
valid for a pci-root"),
+ modelName);
+ goto error;
+ }
+ if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("the spapr-pci-host-bridge controller "
+ "is not supported in this QEMU binary"));
+ goto error;
+ }
+ virBufferAsprintf(&buf, "%s,index=%d,id=%s",
+ modelName, def->opts.pciopts.idx,
+ def->info.alias);
+ break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT:
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
@@ -2989,6 +3023,7 @@ qemuBuildControllerDevStr(const virDomainDef *domainDef,
if (virBufferCheckError(&buf) < 0)
goto error;
+ done:
*devstr = virBufferContentAndReset(&buf);
return 0;
@@ -3046,10 +3081,16 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
continue;
}
- /* skip pci-root/pcie-root */
+ /* skip pcie-root */
if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
- (cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT ||
- cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT))
+ cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT)
+ continue;
+
+ /* Skip pci-root, except for pSeries guests (which actually
+ * support more than one PCI Host Bridge per guest) */
+ if (!qemuDomainMachineIsPSeries(def) &&
+ cont->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
+ cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT)
continue;
/* first SATA controller on Q35 machines is implicit */
--
2.7.4