[PATCH 1/3] virtio_net: Add VIRTIO_NET_F_STANDBY feature bit.

From: Sridhar Samudrala <>

This feature bit can be used by a hypervisor to indicate to the virtio_net
device that it can act as a standby for another device with the same MAC
address.

Signed-off-by: Sridhar Samudrala <>
Signed-off-by: Venu Busireddy <>
---
 hw/net/virtio-net.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 385b1a0..411f8fb 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -2198,6 +2198,8 @@ static Property virtio_net_properties[] = {
                      true),
     DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN),
     DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str),
+    DEFINE_PROP_BIT64("standby", VirtIONet, host_features, VIRTIO_NET_F_STANDBY,
+                      false),
     DEFINE_PROP_END_OF_LIST(),
 };