Assign an address when hotplugging a virtio-serial device

src/qemu/qemu_hotplug.c

@@ -1541,6 +1541,8 @@ int qemuDomainAttachChrDevice(virQEMUDriverPtr driver,
     virDomainDefPtr vmdef = vm->def;
     char *devstr = NULL;
     char *charAlias = NULL;
+    bool need_release = false;
+    bool allowZero = false;
 
     if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE)) {
         virReportError(VIR_ERR_OPERATION_INVALID, "%s",
@@ -1551,6 +1553,16 @@ int qemuDomainAttachChrDevice(virQEMUDriverPtr driver,
     if (qemuAssignDeviceChrAlias(vmdef, chr, -1) < 0)
         goto cleanup;
 
+    if (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
+        chr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_VIRTIO)
+        allowZero = true;
+
+    if (virDomainVirtioSerialAddrAutoAssign(priv->vioserialaddrs,
+                                            &chr->info,
+                                            allowZero) < 0)
+        goto cleanup;
+    need_release = true;
+
     if (qemuBuildChrDeviceStr(&devstr, vm->def, chr, priv->qemuCaps) < 0)
         goto cleanup;
 
@@ -1582,6 +1594,8 @@ int qemuDomainAttachChrDevice(virQEMUDriverPtr driver,
  cleanup:
     if (ret < 0 && virDomainObjIsActive(vm))
         qemuDomainChrInsertPreAllocCleanup(vm->def, chr);
+    if (ret < 0 && need_release)
+        virDomainVirtioSerialAddrRelease(priv->vioserialaddrs, &chr->info);
     VIR_FREE(charAlias);
     VIR_FREE(devstr);
     return ret;
@@ -4120,10 +4134,13 @@ int qemuDomainDetachChrDevice(virQEMUDriverPtr driver,
         goto cleanup;
 
     rc = qemuDomainWaitForDeviceRemoval(vm);
-    if (rc == 0 || rc == 1)
+    if (rc == 0 || rc == 1) {
+        virDomainVirtioSerialAddrRelease(priv->vioserialaddrs, &tmpChr->info);
         ret = qemuDomainRemoveChrDevice(driver, vm, tmpChr);
-    else
+    } else {
         ret = 0;
+    }
+
 
  cleanup:
     qemuDomainResetDeviceRemoval(vm);

tests/qemuhotplugtest.c

@@ -86,7 +86,7 @@ qemuHotplugCreateObjects(virDomainXMLOptionPtr xmlopt,
     if (event)
         virQEMUCapsSet(priv->qemuCaps, QEMU_CAPS_DEVICE_DEL_EVENT);
 
-    if (qemuDomainAssignPCIAddresses((*vm)->def, priv->qemuCaps, *vm) < 0)
+    if (qemuDomainAssignAddresses((*vm)->def, priv->qemuCaps, *vm) < 0)
         goto cleanup;
 
     if (qemuAssignDeviceAliases((*vm)->def, priv->qemuCaps) < 0)