netdev - Re: [virtio-dev] Re: [Qemu-devel] [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio

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Date:   Sun, 24 Jun 2018 04:45:36 +0300
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Siwei Liu <loseweigh@...il.com>
Cc:     Cornelia Huck <cohuck@...hat.com>,
        "Samudrala, Sridhar" <sridhar.samudrala@...el.com>,
        Alexander Duyck <alexander.h.duyck@...el.com>,
        virtio-dev@...ts.oasis-open.org, aaron.f.brown@...el.com,
        Jiri Pirko <jiri@...nulli.us>, Jakub Kicinski <kubakici@...pl>,
        Netdev <netdev@...r.kernel.org>, qemu-devel@...gnu.org,
        virtualization@...ts.linux-foundation.org, konrad.wilk@...cle.com,
        boris.ostrovsky@...cle.com,
        Joao Martins <joao.m.martins@...cle.com>,
        Venu Busireddy <venu.busireddy@...cle.com>,
        vijay.balakrishna@...cle.com
Subject: Re: [virtio-dev] Re: [Qemu-devel] [PATCH] qemu: Introduce
 VIRTIO_NET_F_STANDBY feature bit to virtio_net

On Fri, Jun 22, 2018 at 05:17:10PM -0700, Siwei Liu wrote:
> I forgot to mention the above has the assumption that we expose both
> STANDBY and UUID feature to QEMU user. In fact, as we're going towards
> not exposing the STANDBY feature directly to user, UUID may be always
> required to enable STANDBY.

Sounds good.

> If not, how do we make sure QEMU can
> control the visibility of primary device?

Hypervisors fundamentally always can control visibility of all
virtual devices.

> Something to be confirmed
> before implementing the code.
>