Re: [Qemu-devel] [PATCH v3 1/5] virtio_net: Add VIRTIO_NET_F_STANDBY feature bit.

[Dongli Zhang]

I am not familiar with libvirt and I would like to play with this only with 
qemu.

With failover, we need to hotplug the VF on destination server to VM after live
migration. However, the VF on destination server would have different mac 
address.

How can we specify the mac for the new VF to hotplug via qemu, as VF is only a
vfio pci device?

I am trying to play with this with only qemu (w/o libvirt).

Thank you very much!

Dongli Zhang

On 01/08/2019 06:29 AM, Venu Busireddy wrote:
> From: Sridhar Samudrala <address@hidden>
> 
> 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 <address@hidden>
> Signed-off-by: Venu Busireddy <address@hidden>
> ---
>  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(),
>  };
>  
>