qdev/compat: compat property infrastructure.
This add support for switching devices into a compatibility mode
using device properties. Machine types can have a list of properties
for specific devices attached to allow the easy creation of machine
types compatible to older qemu versions.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index 8b0d0ff..06c25af 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -244,3 +244,26 @@
}
}
+static CompatProperty *compat_props;
+
+void qdev_prop_register_compat(CompatProperty *props)
+{
+ compat_props = props;
+}
+
+void qdev_prop_set_compat(DeviceState *dev)
+{
+ CompatProperty *prop;
+
+ if (!compat_props) {
+ return;
+ }
+ for (prop = compat_props; prop->driver != NULL; prop++) {
+ if (strcmp(dev->info->name, prop->driver) != 0) {
+ continue;
+ }
+ if (qdev_prop_parse(dev, prop->property, prop->value) != 0) {
+ abort();
+ }
+ }
+}
