Re: [PATCH] vdpa/mlx5: Use random MAC for the vdpa net instance

[Eli Cohen]

On Fri, Dec 04, 2020 at 10:53:28AM +0800, Jason Wang wrote:
> 
> On 2020/12/3 下午8:24, Eli Cohen wrote:
> > > > It is mentioned in Parav's patchset that this will be coming in a
> > > > subsequent patch to his vdpa tool.
> > > So I think kernel has two options:
> > > - require a mac when device is created, we supply it to guest
> > Yes, the driver should always set VIRTIO_NET_F_MAC and provide a MAC -
> > either random or whatever configured using the vdpa too.
> 
> 
> A questions here, I think current mlx5 vdpa works for VF only. So I think
> the VF should have a given MAC? If yes, can we use that MAC?
> 
The MAC assigned to VF is by the NIC implementation. Both ther regular
NIC driver and the VDPA implementation can co-exist so we can't use the
NIC's MAC for VDPA. We want to steer traffic based on its destination
MAC address to either VDPA or regular NIC.