qdev: add HotplugHandler->post_plug() callback

The ->pre_plug() callback is invoked before the device is realized.  The
->plug() callback is invoked when the device is being realized but
before it is reset.

This patch adds a ->post_plug() callback which is invoked after the
device has been reset.  This callback is needed by HotplugHandlers that
need to wait until after ->reset().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20180716083732.3347-2-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/hw/hotplug.h b/include/hw/hotplug.h
index 1a0516a479..51541d63e1 100644
--- a/include/hw/hotplug.h
+++ b/include/hw/hotplug.h
@@ -47,6 +47,8 @@ typedef void (*hotplug_fn)(HotplugHandler *plug_handler,
  * @parent: Opaque parent interface.
  * @pre_plug: pre plug callback called at start of device.realize(true)
  * @plug: plug callback called at end of device.realize(true).
+ * @post_plug: post plug callback called after device.realize(true) and device
+ *             reset
  * @unplug_request: unplug request callback.
  *                  Used as a means to initiate device unplug for devices that
  *                  require asynchronous unplug handling.
@@ -61,6 +63,7 @@ typedef struct HotplugHandlerClass {
     /* <public> */
     hotplug_fn pre_plug;
     hotplug_fn plug;
+    void (*post_plug)(HotplugHandler *plug_handler, DeviceState *plugged_dev);
     hotplug_fn unplug_request;
     hotplug_fn unplug;
 } HotplugHandlerClass;
@@ -84,6 +87,14 @@ void hotplug_handler_pre_plug(HotplugHandler *plug_handler,
                               Error **errp);
 
 /**
+ * hotplug_handler_post_plug:
+ *
+ * Call #HotplugHandlerClass.post_plug callback of @plug_handler.
+ */
+void hotplug_handler_post_plug(HotplugHandler *plug_handler,
+                               DeviceState *plugged_dev);
+
+/**
  * hotplug_handler_unplug_request:
  *
  * Calls #HotplugHandlerClass.unplug_request callback of @plug_handler.