Re: [virtio-comment] RE: RE: RE: RE: [RFC] virtio-net: support access and control the member devices

[Jason Wang <jasowang@redhat.com>]

On Fri, Aug 4, 2023 at 1:03âAM Satananda Burla <sburla@marvell.com> wrote:
>
>
>
> > -----Original Message-----
> > From: virtio-dev@lists.oasis-open.org <virtio-dev@lists.oasis-open.org>
> > On Behalf Of Parav Pandit
> > Sent: Thursday, August 3, 2023 6:16 AM
> > To: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> > Cc: virtio-dev@lists.oasis-open.org; jasowang@redhat.com; virtio-
> > comment@lists.oasis-open.org; Michael S. Tsirkin <mst@redhat.com>
> > Subject: [EXT] [virtio-dev] RE: [virtio-comment] RE: RE: RE: RE: [RFC]
> > virtio-net: support access and control the member devices
> >
> > External Email
> >
> > ----------------------------------------------------------------------
> >
> >
> > > From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> > > Sent: Thursday, August 3, 2023 5:11 PM
> > >
> > > On Thu, 3 Aug 2023 11:39:20 +0000, Parav Pandit <parav@nvidia.com>
> > wrote:
> > > >
> > > > > From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> > > > > Sent: Thursday, August 3, 2023 5:00 PM
> > > >
> > > >
> > > > > > Admin command is what is suitable for device management,
> > including
> > > > > features and configspace fields setup.
> > > > >
> > > > > I agree.
> > > > >
> > > > > But some configuration such as mac, ip(eswitch rule) for vfs that
> > > > > are suitable for the admin queue?
> > > > Mac, why not.
> > >
> > > Mac is the concept of the virtio-net.
> > > How do abstract it? Or a admin queue command
> > > VIRTIO_ADMIN_CMD_NET_MAC_SET?
> > >
> > I don't think we should abstract it.
> > A one command that can set one or multiple fields of the config space is
> > fine.
> >
> > > >
> > > > Eswith rules should be programmed through the flow vq, that we are
> > working
> > > with Heng, Satananda and David.
> > >
> > > I know you are doing for the n-tuple receive flow filters.
> > >
> > > Here I mean we want to limit the ip of the VF. In the cloud case, the
> > vm is
> > > untrust, we should force the vm that it just can use the specified ip.
> > >
> > That is fine,
> >  It is just that the flow filter commands may be different for ingress
> > and egress direction of the VF.
> > The command that we are adding does not have concept of switch ports,
> > because there is no switch.
> >
> > For eswitch case, you would define more commands that will have switch
> > ports...
> >
> > > Then can we configure the ip of the vfs via the admin queue?
> >
> > It should be through the flow filter queue so that it can be performant
> > like nic tx/rxq which has dedicated role.
> > For switch use case command formats or fields needs extension.
> IMO, kernel already prescribes using representors for mac/vlan  programming
> for SRIOV/SIOV eswitch devices, member devices may have to support representor
> interfaces.

I second this.

Thanks

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