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 <zyi...@linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiu...@linux.ibm.com>
Reviewed-by: Stefan Zimmermann <s...@linux.ibm.com>
Reviewed-by: Bjoern Walk <bw...@linux.ibm.com>
Reviewed-by: Ján Tomko <jto...@redhat.com>
Reviewed-by: Andrea Bolognani <abolo...@redhat.com>
---
src/qemu/qemu_hotplug.c | 160 +++++++++++++++++++++++++++++++++++++---
1 file changed, 151 insertions(+), 9 deletions(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 0a63741b9e..5f756b7267 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)
@@ -845,8 +919,13 @@ 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;
@@ -954,7 +1033,16 @@ 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;
@@ -1417,6 +1505,7 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver,
}
if (qemuDomainIsS390CCW(vm->def) &&
+ net->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI &&
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_CCW)) {
net->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW;
if (!(ccwaddrs = virDomainCCWAddressSetCreateFromDomain(vm->def)))
@@ -1486,7 +1575,15 @@ 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;
@@ -1703,8 +1800,16 @@ 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;
@@ -2360,9 +2465,14 @@ 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;
@@ -2842,8 +2952,16 @@ 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;
@@ -3088,8 +3206,13 @@ 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;
@@ -3262,9 +3385,15 @@ 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;
@@ -3341,8 +3470,14 @@ 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;
@@ -5328,10 +5463,17 @@ 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
--
libvir-list mailing list
libvir-list@redhat.com
https://www.redhat.com/mailman/listinfo/libvir-list
