[libvirt] [PATCH v6 11/13] qemu: Add hotpluging support for PCI devices on S390 guests
Yi Min Zhao
zyimin at linux.ibm.com
Fri Sep 28 08:46:24 UTC 2018
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 at linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
Reviewed-by: Stefan Zimmermann <stzi at linux.ibm.com>
Reviewed-by: Bjoern Walk <bwalk at linux.vnet.ibm.com>
---
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
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