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62ac6b4354
This PCI controller, named "dmi-to-pci-bridge" in the libvirt config, and implemented with qemu's "i82801b11-bridge" device, connects to a PCI Express slot (e.g. one of the slots provided by the pcie-root controller, aka "pcie.0" on the qemu commandline), and provides 31 *non-hot-pluggable* PCI (*not* PCIe) slots, numbered 1-31. Any time a machine is defined which has a pcie-root controller (i.e. any q35-based machinetype), libvirt will automatically add a dmi-to-pci-bridge controller if one doesn't exist, and also add a pci-bridge controller. The reasoning here is that any useful domain will have either an immediate (startup time) or eventual (subsequent hot-plug) need for a standard PCI slot; since the pcie-root controller only provides PCIe slots, we need to connect a dmi-to-pci-bridge controller to it in order to get a non-hot-plug PCI slot that we can then use to connect a pci-bridge - the slots provided by the pci-bridge will be both standard PCI and hot-pluggable. Since pci-bridge devices themselves can not be hot-plugged into a running system (although you can hot-plug other devices into a pci-bridge's slots), any new pci-bridge controller that is added can (and will) be plugged into the dmi-to-pci-bridge as long as it has empty slots available. This patch is also changing the qemuxml2xml-pcie test from a "DO_TEST" to a "DO_DIFFERENT_TEST". This is so that the "before" xml can omit the automatically added dmi-to-pci-bridge and pci-bridge devices, and the "after" xml can include it - this way we are testing if libvirt is properly adding these devices. |
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| .. | ||
| qemuxml2xmlout-balloon-device-auto.xml | ||
| qemuxml2xmlout-channel-virtio-auto.xml | ||
| qemuxml2xmlout-console-compat-auto.xml | ||
| qemuxml2xmlout-console-virtio.xml | ||
| qemuxml2xmlout-disk-cdrom-empty.xml | ||
| qemuxml2xmlout-disk-mirror.xml | ||
| qemuxml2xmlout-disk-scsi-device-auto.xml | ||
| qemuxml2xmlout-graphics-listen-network2.xml | ||
| qemuxml2xmlout-graphics-spice-timeout.xml | ||
| qemuxml2xmlout-hostdev-scsi-autogen-address.xml | ||
| qemuxml2xmlout-memtune.xml | ||
| qemuxml2xmlout-metadata.xml | ||
| qemuxml2xmlout-numad-auto-memory-vcpu-cpuset.xml | ||
| qemuxml2xmlout-numad-auto-memory-vcpu-no-cpuset-and-placement.xml | ||
| qemuxml2xmlout-numad-auto-vcpu-no-numatune.xml | ||
| qemuxml2xmlout-numad-static-vcpu-no-numatune.xml | ||
| qemuxml2xmlout-pci-autoadd-addr.xml | ||
| qemuxml2xmlout-pci-autoadd-idx.xml | ||
| qemuxml2xmlout-pci-bridge-many-disks.xml | ||
| qemuxml2xmlout-pcie-root.xml | ||
| qemuxml2xmlout-s390-defaultconsole.xml | ||
| qemuxml2xmlout-serial-target-port-auto.xml | ||
| qemuxml2xmlout-usb-ich9-ehci-addr.xml | ||