[libvirt] [PATCH v6 11/13] qemu: Add hotpluging support for PCI devices on S390 guests

This commit adds hotplug support for PCI devices on S390 guests. There's no need to implement hot unplug for zPCI as QEMU implements an unplug callback which will unplug both PCI and zPCI device in a cascaded way. Currently, the following PCI devices are supported: virtio-blk-pci virtio-net-pci virtio-rng-pci virtio-input-host-pci virtio-keyboard-pci virtio-mouse-pci virtio-tablet-pci vfio-pci SCSIVhost device Signed-off-by: Yi Min Zhao <zyimin(a)linux.ibm.com&gt; Reviewed-by: Boris Fiuczynski <fiuczy(a)linux.vnet.ibm.com&gt; Reviewed-by: Stefan Zimmermann <stzi(a)linux.ibm.com&gt; Reviewed-by: Bjoern Walk <bwalk(a)linux.vnet.ibm.com&gt; --- src/qemu/qemu_hotplug.c | 162 +++++++++++++++++++++++++++++++++++++--- 1 file changed, 152 insertions(+), 10 deletions(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 4558a3c02d..e1395d1674 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -154,6 +154,80 @@ qemuHotplugPrepareDiskAccess(virQEMUDriverPtr driver, } +static int +qemuDomainAttachZPCIDevice(qemuMonitorPtr mon, + virDomainDeviceInfoPtr info) +{ + char *devstr_zpci = NULL; + int ret = -1; + + if (!(devstr_zpci = qemuBuildZPCIDevStr(info))) + goto cleanup; + + if (qemuMonitorAddDevice(mon, devstr_zpci) < 0) + goto cleanup; + + ret = 0; + + cleanup: + VIR_FREE(devstr_zpci); + return ret; +} + + +static int +qemuDomainDetachZPCIDevice(qemuMonitorPtr mon, + virDomainDeviceInfoPtr info) +{ + char *zpciAlias = NULL; + int ret = -1; + + if (virAsprintf(&zpciAlias, "zpci%d", info->addr.pci.zpci.uid) < 0) + goto cleanup; + + if (qemuMonitorDelDevice(mon, zpciAlias) < 0) + goto cleanup; + + ret = 0; + + cleanup: + VIR_FREE(zpciAlias); + return ret; +} + + +static int +qemuDomainAttachExtensionDevice(qemuMonitorPtr mon, + virDomainDeviceInfoPtr info) +{ + if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI || + info->addr.pci.extFlags == VIR_PCI_ADDRESS_EXTENSION_NONE) { + return 0; + } + + if (info->addr.pci.extFlags & VIR_PCI_ADDRESS_EXTENSION_ZPCI) + return qemuDomainAttachZPCIDevice(mon, info); + + return 0; +} + + +static int +qemuDomainDetachExtensionDevice(qemuMonitorPtr mon, + virDomainDeviceInfoPtr info) +{ + if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI || + info->addr.pci.extFlags == VIR_PCI_ADDRESS_EXTENSION_NONE) { + return 0; + } + + if (info->addr.pci.extFlags & VIR_PCI_ADDRESS_EXTENSION_ZPCI) + return qemuDomainDetachZPCIDevice(mon, info); + + return 0; +} + + static int qemuHotplugWaitForTrayEject(virDomainObjPtr vm, virDomainDiskDefPtr disk) @@ -805,8 +879,13 @@ qemuDomainAttachDiskGeneric(virQEMUDriverPtr driver, if (qemuHotplugDiskSourceAttach(priv->mon, diskdata) < 0) goto exit_monitor; - if (qemuMonitorAddDevice(priv->mon, devstr) < 0) + if (qemuDomainAttachExtensionDevice(priv->mon, &disk->info) < 0) + goto exit_monitor; + + if (qemuMonitorAddDevice(priv->mon, devstr) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, &disk->info)); goto exit_monitor; + } if (qemuDomainObjExitMonitor(driver, vm) < 0) { ret = -2; @@ -913,7 +992,16 @@ int qemuDomainAttachControllerDevice(virQEMUDriverPtr driver, goto cleanup; qemuDomainObjEnterMonitor(driver, vm); - ret = qemuMonitorAddDevice(priv->mon, devstr); + + if ((ret = qemuDomainAttachExtensionDevice(priv->mon, + &controller->info)) < 0) { + goto exit_monitor; + } + + if ((ret = qemuMonitorAddDevice(priv->mon, devstr)) < 0) + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, &controller->info)); + + exit_monitor: if (qemuDomainObjExitMonitor(driver, vm) < 0) { releaseaddr = false; ret = -1; @@ -1381,7 +1469,8 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver, goto cleanup; } - if (qemuDomainIsS390CCW(vm->def) && + if (net->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI && + qemuDomainIsS390CCW(vm->def) && virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_CCW)) { net->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW; if (!(ccwaddrs = virDomainCCWAddressSetCreateFromDomain(vm->def))) @@ -1451,7 +1540,15 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver, goto try_remove; qemuDomainObjEnterMonitor(driver, vm); + + if (qemuDomainAttachExtensionDevice(priv->mon, &net->info) < 0) { + ignore_value(qemuDomainObjExitMonitor(driver, vm)); + virDomainAuditNet(vm, NULL, net, "attach", false); + goto try_remove; + } + if (qemuMonitorAddDevice(priv->mon, nicstr) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, &net->info)); ignore_value(qemuDomainObjExitMonitor(driver, vm)); virDomainAuditNet(vm, NULL, net, "attach", false); goto try_remove; @@ -1668,8 +1765,16 @@ qemuDomainAttachHostPCIDevice(virQEMUDriverPtr driver, goto error; qemuDomainObjEnterMonitor(driver, vm); - ret = qemuMonitorAddDeviceWithFd(priv->mon, devstr, - configfd, configfd_name); + + if ((ret = qemuDomainAttachExtensionDevice(priv->mon, hostdev->info)) < 0) + goto exit_monitor; + + if ((ret = qemuMonitorAddDeviceWithFd(priv->mon, devstr, + configfd, configfd_name)) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, hostdev->info)); + } + + exit_monitor: if (qemuDomainObjExitMonitor(driver, vm) < 0) goto error; @@ -2325,9 +2430,14 @@ qemuDomainAttachRNGDevice(virQEMUDriverPtr driver, if (qemuMonitorAddObject(priv->mon, &props, &objAlias) < 0) goto exit_monitor; - if (qemuMonitorAddDevice(priv->mon, devstr) < 0) + if (qemuDomainAttachExtensionDevice(priv->mon, &rng->info) < 0) goto exit_monitor; + if (qemuMonitorAddDevice(priv->mon, devstr) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, &rng->info)); + goto exit_monitor; + } + if (qemuDomainObjExitMonitor(driver, vm) < 0) { releaseaddr = false; goto cleanup; @@ -2807,8 +2917,16 @@ qemuDomainAttachSCSIVHostDevice(virQEMUDriverPtr driver, qemuDomainObjEnterMonitor(driver, vm); - ret = qemuMonitorAddDeviceWithFd(priv->mon, devstr, vhostfd, vhostfdName); + if ((ret = qemuDomainAttachExtensionDevice(priv->mon, hostdev->info)) < 0) + goto exit_monitor; + + if ((ret = qemuMonitorAddDeviceWithFd(priv->mon, devstr, vhostfd, + vhostfdName)) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, hostdev->info)); + goto exit_monitor; + } + exit_monitor: if (qemuDomainObjExitMonitor(driver, vm) < 0 || ret < 0) goto audit; @@ -3053,8 +3171,13 @@ qemuDomainAttachShmemDevice(virQEMUDriverPtr driver, release_backing = true; - if (qemuMonitorAddDevice(priv->mon, shmstr) < 0) + if (qemuDomainAttachExtensionDevice(priv->mon, &shmem->info) < 0) + goto exit_monitor; + + if (qemuMonitorAddDevice(priv->mon, shmstr) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, &shmem->info)); goto exit_monitor; + } if (qemuDomainObjExitMonitor(driver, vm) < 0) { release_address = false; @@ -3227,9 +3350,15 @@ qemuDomainAttachInputDevice(virQEMUDriverPtr driver, goto cleanup; qemuDomainObjEnterMonitor(driver, vm); - if (qemuMonitorAddDevice(priv->mon, devstr) < 0) + + if (qemuDomainAttachExtensionDevice(priv->mon, &input->info) < 0) goto exit_monitor; + if (qemuMonitorAddDevice(priv->mon, devstr) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, &input->info)); + goto exit_monitor; + } + if (qemuDomainObjExitMonitor(driver, vm) < 0) { releaseaddr = false; goto cleanup; @@ -3306,8 +3435,14 @@ qemuDomainAttachVsockDevice(virQEMUDriverPtr driver, goto cleanup; qemuDomainObjEnterMonitor(driver, vm); - if (qemuMonitorAddDeviceWithFd(priv->mon, devstr, vsockPriv->vhostfd, fdname) < 0) + + if (qemuDomainAttachExtensionDevice(priv->mon, &vsock->info) < 0) + goto exit_monitor; + + if (qemuMonitorAddDeviceWithFd(priv->mon, devstr, vsockPriv->vhostfd, fdname) < 0) { + ignore_value(qemuDomainDetachExtensionDevice(priv->mon, &vsock->info)); goto exit_monitor; + } if (qemuDomainObjExitMonitor(driver, vm) < 0) { releaseaddr = false; @@ -5292,10 +5427,17 @@ int qemuDomainDetachControllerDevice(virQEMUDriverPtr driver, qemuDomainMarkDeviceForRemoval(vm, &detach->info); qemuDomainObjEnterMonitor(driver, vm); + if (detach->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI && + qemuDomainDetachExtensionDevice(priv->mon, &detach->info)) { + goto exit_monitor; + } + if (qemuMonitorDelDevice(priv->mon, detach->info.alias)) { ignore_value(qemuDomainObjExitMonitor(driver, vm)); goto cleanup; } + + exit_monitor: if (qemuDomainObjExitMonitor(driver, vm) < 0) goto cleanup; -- Yi Min