[Qemu-devel] [PATCH 3/6] qdev: Register static properties as class properties

[Eduardo Habkost <ehabkost@redhat.com>]

Instead of registering qdev static properties on instance_init,
register them as class properties, at qdev_class_set_props().

qdev_property_add_legacy() was replaced by an equivalent
qdev_class_property_add_legacy() function.
qdev_property_add_static(), on the other hand, can't be
eliminated yet because it is used by arm_cpu_post_init().

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 hw/core/qdev.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 58 insertions(+), 11 deletions(-)

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 178cfa1..831414d 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -739,12 +739,12 @@ static void qdev_get_legacy_property(Object *obj, Visitor *v,
 }
 
 /**
- * qdev_property_add_legacy:
- * @dev: Device to add the property to.
+ * qdev_class_property_add_legacy:
+ * @oc: Device to add the property to.
  * @prop: The qdev property definition.
  * @errp: location to store error information.
  *
- * Add a legacy QOM property to @dev for qdev property @prop.
+ * Add a legacy QOM property to @oc for qdev property @prop.
  * On error, store error in @errp.
  *
  * Legacy properties are string versions of QOM properties.  The format of
@@ -754,7 +754,7 @@ static void qdev_get_legacy_property(Object *obj, Visitor *v,
  * Do not use this is new code!  QOM Properties added through this interface
  * will be given names in the "legacy" namespace.
  */
-static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
+static void qdev_class_property_add_legacy(ObjectClass *oc, Property *prop,
                                      Error **errp)
 {
     gchar *name;
@@ -765,11 +765,13 @@ static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
     }
 
     name = g_strdup_printf("legacy-%s", prop->name);
-    object_property_add(OBJECT(dev), name, "str",
-                        prop->info->print ? qdev_get_legacy_property : prop->info->get,
-                        NULL,
-                        NULL,
-                        prop, errp);
+    object_class_property_add(oc, name, "str",
+                               prop->info->print ?
+                                   qdev_get_legacy_property :
+                                   prop->info->get,
+                               NULL,
+                               NULL,
+                               prop, errp);
 
     g_free(name);
 }
@@ -844,6 +846,45 @@ void qdev_property_add_static(DeviceState *dev, Property *prop,
     qdev_property_set_to_default(dev, prop, &error_abort);
 }
 
+/**
+ * qdev_class_property_add_static:
+ * @oc: Class to add the property to.
+ * @prop: The qdev property definition.
+ * @errp: location to store error information.
+ *
+ * Add a static QOM property to @oc for qdev property @prop.
+ * On error, store error in @errp.  Static properties access data in a struct.
+ * The type of the QOM property is derived from prop->info.
+ */
+static void qdev_class_property_add_static(ObjectClass *oc, Property *prop,
+                                           Error **errp)
+{
+    Error *local_err = NULL;
+
+    /*
+     * TODO qdev_prop_ptr does not have getters or setters.  It must
+     * go now that it can be replaced with links.  The test should be
+     * removed along with it: all static properties are read/write.
+     */
+    if (!prop->info->get && !prop->info->set) {
+        return;
+    }
+
+    object_class_property_add(oc, prop->name, prop->info->name,
+                              prop->info->get, prop->info->set,
+                              prop->info->release,
+                              prop, &local_err);
+
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    object_class_property_set_description(oc, prop->name,
+                                          prop->info->description,
+                                          &error_abort);
+}
+
 /* @qdev_alias_all_properties - Add alias properties to the source object for
  * all qdev properties on the target DeviceState.
  */
@@ -867,8 +908,15 @@ void qdev_alias_all_properties(DeviceState *target, Object *source)
 
 void qdev_class_set_props(DeviceClass *dc, Property *props)
 {
+    Property *prop;
+    ObjectClass *oc = OBJECT_CLASS(dc);
+
     assert(!dc->props);
     dc->props = props;
+    for (prop = dc->props; prop && prop->name; prop++) {
+        qdev_class_property_add_legacy(oc, prop, &error_abort);
+        qdev_class_property_add_static(oc, prop, &error_abort);
+    }
 }
 
 static int qdev_add_hotpluggable_device(Object *obj, void *opaque)
@@ -1068,8 +1116,7 @@ static void device_initfn(Object *obj)
     class = object_get_class(OBJECT(dev));
     do {
         for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
-            qdev_property_add_legacy(dev, prop, &error_abort);
-            qdev_property_add_static(dev, prop, &error_abort);
+            qdev_property_set_to_default(dev, prop, &error_abort);
         }
         class = object_class_get_parent(class);
     } while (class != object_class_by_name(TYPE_DEVICE));
-- 
2.7.4