Re: Some questions about virtio-net on Xen x86

[Anthony PERARD <anthony.perard@citrix.com>]

On Thu, Aug 19, 2021 at 10:38:49AM +0000, Jiamei Xie wrote:
> Hi all,
> I tried to run virtio-net on X86 machine according to the Wiki page https://wiki.xenproject.org/wiki/Virtio_On_Xen. 
> And I Encountered some confusing problems.
> 
> It seems eth0 is not virtio-net, properly a pv-net. I am really confused.
> 
>  I have the following questions:
> 1. Does Xen x86 still support virtio-net based on QEMU backend?

Well, we don't test it, and the libxl toolstack doesn't really help
getting virtio devices.

> 2. If yes, is there anything wrong in my guest config file?

The wiki state that you should add 'xen_emul_unplug=never' to the
guest kernel's command line. (That would be "extra" in your guest.cfg.)
I think that will prevent the virtio-net device from been unplug, and so
you will see the virtio-net device in the guest.

But since libxl create Xen PV device anyway, you'll still have the Xen
PV NIC, so two NICs with the same MAC.

I hope that help,

-- 
Anthony PERARD