1 files changed, 27 insertions, 0 deletions
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 627d653dc1..09b7a441eb 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -5,6 +5,7 @@
 #include "qemu/bitmap.h"
 #include "qom/object.h"
 #include "hw/hotplug.h"
+#include "hw/resettable.h"
 
 enum {
     DEV_NVECTORS_UNSPECIFIED = -1,
@@ -122,6 +123,11 @@ typedef struct DeviceClass {
     bool hotpluggable;
 
     /* callbacks */
+    /*
+     * Reset method here is deprecated and replaced by methods in the
+     * resettable class interface to implement a multi-phase reset.
+     * TODO: remove once every reset callback is unused
+     */
     DeviceReset reset;
     DeviceRealize realize;
     DeviceUnrealize unrealize;
@@ -146,6 +152,7 @@ struct NamedGPIOList {
 /**
  * DeviceState:
  * @realized: Indicates whether the device has been fully constructed.
+ * @reset: ResettableState for the device; handled by Resettable interface.
  *
  * This structure should not be accessed directly.  We declare it here
  * so that it can be embedded in individual device state structures.
@@ -168,6 +175,7 @@ struct DeviceState {
     int num_child_bus;
     int instance_id_alias;
     int alias_required_for_version;
+    ResettableState reset;
 };
 
 struct DeviceListener {
@@ -220,6 +228,7 @@ typedef struct BusChild {
 /**
  * BusState:
  * @hotplug_handler: link to a hotplug handler associated with bus.
+ * @reset: ResettableState for the bus; handled by Resettable interface.
  */
 struct BusState {
     Object obj;
@@ -231,6 +240,7 @@ struct BusState {
     int num_children;
     QTAILQ_HEAD(, BusChild) children;
     QLIST_ENTRY(BusState) sibling;
+    ResettableState reset;
 };
 
 /**
@@ -417,6 +427,18 @@ void qdev_reset_all_fn(void *opaque);
 void qbus_reset_all(BusState *bus);
 void qbus_reset_all_fn(void *opaque);
 
+/**
+ * device_is_in_reset:
+ * Return true if the device @dev is currently being reset.
+ */
+bool device_is_in_reset(DeviceState *dev);
+
+/**
+ * bus_is_in_reset:
+ * Return true if the bus @bus is currently being reset.
+ */
+bool bus_is_in_reset(BusState *bus);
+
 /* This should go away once we get rid of the NULL bus hack */
 BusState *sysbus_get_default(void);
 
@@ -440,6 +462,11 @@ void device_legacy_reset(DeviceState *dev);
 
 void device_class_set_props(DeviceClass *dc, Property *props);
 
+/**
+ * device_class_set_parent_reset:
+ * TODO: remove the function when DeviceClass's reset method
+ * is not used anymore.
+ */
 void device_class_set_parent_reset(DeviceClass *dc,
                                    DeviceReset dev_reset,
                                    DeviceReset *parent_reset);