virtio: add class_size to VirtioPCIDeviceTypeInfo

Needed when VirtioPCIClass subclasses have their own
class struct with some extra fields.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20190307080244.9011-2-kraxel@redhat.com

1 files changed, 1 insertions, 0 deletions

diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index bd223a6e3b..18581854ca 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -230,6 +230,7 @@ typedef struct VirtioPCIDeviceTypeInfo {
 
     /* Same as TypeInfo fields: */
     size_t instance_size;
+    size_t class_size;
     void (*instance_init)(Object *obj);
     void (*class_init)(ObjectClass *klass, void *data);
 } VirtioPCIDeviceTypeInfo;