Previously there was no way to have a Q35 domain that didn't have
these two controllers. This patch skips their creation as long as
there are some other kinds of pci controllers at index 1 and 2
(e.g. some pcie-root-port controllers).
I'm hoping that soon we won't add them at all, plugging all devices
into auto-added pcie-*-port ports instead, but in the meantime this
makes it easier to experiment with alternative bus hierarchies.
---
src/qemu/qemu_domain.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index d1f8175..8348460 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1951,14 +1951,18 @@ qemuDomainDefAddDefaultDevices(virDomainDefPtr def,
VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT)) {
goto cleanup;
}
- if (virDomainDefMaybeAddController(
- def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 1,
- VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE) < 0 ||
- virDomainDefMaybeAddController(
- def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 2,
- VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE) < 0) {
+ /* add a dmi-to-pci-bridge and a pci-bridge if there are no pci
controllers
+ * other than the pcie-root. This is so that there will be
hot-pluggable
+ * PCI slots available
+ */
+ if (virDomainControllerFind(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 1) <
0 &&
+ !virDomainDefAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 1,
+
VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE))
+ goto cleanup;
+ if (virDomainControllerFind(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 2) <
0 &&
+ !virDomainDefAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 2,
+ VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE))
goto cleanup;
- }
}
if (addDefaultMemballoon && !def->memballoon) {
--
2.5.5
--
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