On 14/10/2026 10:11, Daniel P. Berrangé wrote:
On Wed, Oct 14, 2026 at 10:05:01AM +0100, Mark Cave-Ayland wrote:
On 13/10/2026 13:06, Daniel P. Berrangé wrote:
Add API docs to object_property_(add/try_add/del) to recommend
use of class properties instead.
Signed-off-by: Daniel P. Berrangé <[email protected]>
---
include/qom/object.h | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 deletions(-)
diff --git a/include/qom/object.h b/include/qom/object.h
index 4c0645817a5..d3fddb449f5 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -1171,6 +1171,16 @@ void object_unref(void *obj);
* @opaque: an opaque pointer to pass to the callbacks for the property
* @errp: pointer to error object
*
+ * Further use of this method is deprecated. Properties for an
+ * object should be statically declared against the class, and
+ * not be permitted to vary at runtime. Use the
+ * object_class_property_add() method (and its variants) instead.
+ *
+ * If usage scenarios require differing subsets of properties
+ * to be present, this should be handled by creating further
+ * specialized subclasses instead of dynamically registering
+ * properties against instances.
+ *
* Returns: The #ObjectProperty; this can be used to set the @resolve
* callback for child and link properties.
*/
@@ -1183,9 +1193,6 @@ ObjectProperty *object_property_try_add(Object *obj,
const char *name,
/**
* object_property_add:
- * Same as object_property_try_add() with @errp hardcoded to
- * &error_abort.
- *
* @obj: the object to add a property to
* @name: the name of the property. This can contain any character except
for
* a forward slash. In general, you should use hyphens '-' instead of
@@ -1202,6 +1209,12 @@ ObjectProperty *object_property_try_add(Object *obj,
const char *name,
* meant to allow a property to free its opaque upon object
* destruction. This may be NULL.
* @opaque: an opaque pointer to pass to the callbacks for the property
+ *
+ * Same as object_property_try_add() with @errp hardcoded to
+ * &error_abort.
+ *
+ * Further use of this method is deprecated, see
+ * object_property_try_add() for details.
*/
ObjectProperty *object_property_add(Object *obj, const char *name,
const char *type,
@@ -1210,6 +1223,12 @@ ObjectProperty *object_property_add(Object *obj, const
char *name,
ObjectPropertyRelease *release,
void *opaque);
+/**
+ * object_property_del:
+ *
+ * Further use of this method is deprecated, see
+ * object_property_try_add() for details.
+ */
void object_property_del(Object *obj, const char *name);
ObjectProperty *object_class_property_add(ObjectClass *klass, const char
*name,
Looks good to me, and at least it means LLMs should pick up the recommended
usage going forward. Do we also want to update checkpatch.pl to emit a
warning if someone uses these legacy functions so that it gets flagged
during local testing/CI too?
As long as we have piles of code still using the old instance level
APIs remaining to be converted, I think a checkpatch test will be
too annoying.
I'll take that as a hint to continue chipping away at converting devices
under hw/ then ;)
ATB,
Mark.
