[PATCH v2 25/44] qdev: Separate generic and device-specific property registration

[Eduardo Habkost <ehabkost@redhat.com>]

qdev_class_add_property() and qdev_property_add_static() will
have code that's specific for device types.

object_class_property_add_field() and object_property_add_static()
will be generic and part of the QOM field property API.  Note
that the new functions have a `name` parameter because the plan
is to eventually get rid of the Property.name field.

The declarations for the new functions are being added to
qdev-properties.h, but they will be moved to a QOM header later.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Changes v1 -> v2:
* Patch redone after changes in previous patches in the series
* Rename new functions to object*_property_add_field()
---
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: qemu-devel@nongnu.org
---
 hw/core/qdev-prop-internal.h | 13 +++++++++++++
 include/hw/qdev-properties.h | 16 ++++++++++++++++
 hw/core/qdev-properties.c    | 25 +++++++++++++++++--------
 3 files changed, 46 insertions(+), 8 deletions(-)

diff --git a/hw/core/qdev-prop-internal.h b/hw/core/qdev-prop-internal.h
index 9cf5cc1d51..0e16d28171 100644
--- a/hw/core/qdev-prop-internal.h
+++ b/hw/core/qdev-prop-internal.h
@@ -27,4 +27,17 @@ void qdev_propinfo_get_int32(Object *obj, Visitor *v, const char *name,
 void qdev_propinfo_get_size32(Object *obj, Visitor *v, const char *name,
                               void *opaque, Error **errp);
 
+/**
+ * object_property_add_field: Add a field property to an object instance
+ * @obj: object instance
+ * @name: property name
+ * @prop: property definition
+ *
+ * This function should not be used in new code.  Please add class properties
+ * instead, using object_class_add_field().
+ */
+ObjectProperty *
+object_property_add_field(Object *obj, const char *name,
+                          Property *prop);
+
 #endif
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index aae882317a..bbc5244ed0 100644
--- a/include/hw/qdev-properties.h
+++ b/include/hw/qdev-properties.h
@@ -167,6 +167,22 @@ extern const PropertyInfo qdev_prop_link;
 #define DEFINE_PROP_END_OF_LIST()               \
     {}
 
+/**
+ * object_class_property_add_field: Add a field property to object class
+ * @oc: object class
+ * @name: property name
+ * @prop: property definition
+ *
+ * Add a field property to an object class.  A field property is
+ * a property that will change a field at a specific offset of the
+ * object instance struct.
+ *
+ * *@prop must exist for the life time of @oc.
+ */
+ObjectProperty *
+object_class_property_add_field(ObjectClass *oc, const char *name,
+                                Property *prop);
+
 /*
  * Set properties between creation and realization.
  *
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index a5d5d74f32..e9e2a34f3b 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -835,20 +835,20 @@ const PropertyInfo qdev_prop_link = {
     .create = create_link_property,
 };
 
-void qdev_property_add_static(DeviceState *dev, Property *prop)
+ObjectProperty *
+object_property_add_field(Object *obj, const char *name, Property *prop)
 {
-    Object *obj = OBJECT(dev);
     ObjectProperty *op;
 
     assert(!prop->info->create);
 
-    op = object_property_add(obj, prop->name, prop->info->name,
+    op = object_property_add(obj, name, prop->info->name,
                              field_prop_getter(prop->info),
                              field_prop_setter(prop->info),
                              prop->info->release,
                              prop);
 
-    object_property_set_description(obj, prop->name,
+    object_property_set_description(obj, name,
                                     prop->info->description);
 
     if (prop->set_default) {
@@ -857,12 +857,14 @@ void qdev_property_add_static(DeviceState *dev, Property *prop)
             op->init(obj, op);
         }
     }
+
+    return op;
 }
 
-static void qdev_class_add_property(DeviceClass *klass, const char *name,
-                                    Property *prop)
+ObjectProperty *
+object_class_property_add_field(ObjectClass *oc, const char *name,
+                                Property *prop)
 {
-    ObjectClass *oc = OBJECT_CLASS(klass);
     ObjectProperty *op;
 
     if (prop->info->create) {
@@ -882,6 +884,12 @@ static void qdev_class_add_property(DeviceClass *klass, const char *name,
         object_class_property_set_description(oc, name,
                                               prop->info->description);
     }
+    return op;
+}
+
+void qdev_property_add_static(DeviceState *dev, Property *prop)
+{
+    object_property_add_field(OBJECT(dev), prop->name, prop);
 }
 
 /**
@@ -932,12 +940,13 @@ static void qdev_class_add_legacy_property(DeviceClass *dc, Property *prop)
 
 void device_class_set_props(DeviceClass *dc, Property *props)
 {
+    ObjectClass *oc = OBJECT_CLASS(dc);
     Property *prop;
 
     dc->props_ = props;
     for (prop = props; prop && prop->name; prop++) {
         qdev_class_add_legacy_property(dc, prop);
-        qdev_class_add_property(dc, prop->name, prop);
+        object_class_property_add_field(oc, prop->name, prop);
     }
 }
 
-- 
2.28.0