Suggested-by: Cornelia Huck <coh...@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
include/hw/virtio/virtio.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index db1c0ddf6b..8d27fe1824 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -120,9 +120,29 @@ struct VirtioDeviceClass {
/* This is what a VirtioDevice must implement */
DeviceRealize realize;
DeviceUnrealize unrealize;
+
+ /**
+ * get_features:
+ * @vdev: the VirtIODevice
+ * @requested_features: existing device feature bits from
+ * vdev->host_features
+ * @errp: pointer to error object
+ *
+ * Get the device feature bits.
+ *
+ * The ->get_features() function typically sets always-on device feature
+ * bits as well as conditional feature bits that require some logic to
+ * compute.
+ *
+ * Device feature bits can also be set in vdev->host_features before this
+ * function is called using DEFINE_PROP_BIT64() qdev properties.
+ *
+ * Returns: the final device feature bits to store in vdev->host_features.
+ */
uint64_t (*get_features)(VirtIODevice *vdev,
uint64_t requested_features,
Error **errp);
+
uint64_t (*bad_features)(VirtIODevice *vdev);
void (*set_features)(VirtIODevice *vdev, uint64_t val);
int (*validate_features)(VirtIODevice *vdev);
--
2.37.1
