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-rw-r--r--hw/i386/microvm.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index 9df15354ce..8de8ca8649 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -320,6 +320,39 @@ static void microvm_fix_kernel_cmdline(MachineState *machine)
     g_free(cmdline);
 }
 
+static void microvm_device_pre_plug_cb(HotplugHandler *hotplug_dev,
+                                       DeviceState *dev, Error **errp)
+{
+    x86_cpu_pre_plug(hotplug_dev, dev, errp);
+}
+
+static void microvm_device_plug_cb(HotplugHandler *hotplug_dev,
+                                   DeviceState *dev, Error **errp)
+{
+    x86_cpu_plug(hotplug_dev, dev, errp);
+}
+
+static void microvm_device_unplug_request_cb(HotplugHandler *hotplug_dev,
+                                             DeviceState *dev, Error **errp)
+{
+    error_setg(errp, "unplug not supported by microvm");
+}
+
+static void microvm_device_unplug_cb(HotplugHandler *hotplug_dev,
+                                     DeviceState *dev, Error **errp)
+{
+    error_setg(errp, "unplug not supported by microvm");
+}
+
+static HotplugHandler *microvm_get_hotplug_handler(MachineState *machine,
+                                                   DeviceState *dev)
+{
+    if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
+        return HOTPLUG_HANDLER(machine);
+    }
+    return NULL;
+}
+
 static void microvm_machine_state_init(MachineState *machine)
 {
     MicrovmMachineState *mms = MICROVM_MACHINE(machine);
@@ -503,6 +536,7 @@ static void microvm_machine_initfn(Object *obj)
 static void microvm_class_init(ObjectClass *oc, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 
     mc->init = microvm_machine_state_init;
 
@@ -524,6 +558,13 @@ static void microvm_class_init(ObjectClass *oc, void *data)
     /* Machine class handlers */
     mc->reset = microvm_machine_reset;
 
+    /* hotplug (for cpu coldplug) */
+    mc->get_hotplug_handler = microvm_get_hotplug_handler;
+    hc->pre_plug = microvm_device_pre_plug_cb;
+    hc->plug = microvm_device_plug_cb;
+    hc->unplug_request = microvm_device_unplug_request_cb;
+    hc->unplug = microvm_device_unplug_cb;
+
     object_class_property_add(oc, MICROVM_MACHINE_PIC, "OnOffAuto",
                               microvm_machine_get_pic,
                               microvm_machine_set_pic,
@@ -573,6 +614,7 @@ static const TypeInfo microvm_machine_info = {
     .class_size    = sizeof(MicrovmMachineClass),
     .class_init    = microvm_class_init,
     .interfaces = (InterfaceInfo[]) {
+         { TYPE_HOTPLUG_HANDLER },
          { }
     },
 };