Re: [Qemu-discuss] virtio device instances identification by guest

[Artem Pisarenko]

Forgot to clarify that identification needs to be unique only to machine
scope. 'virtio-net-pci' has 'mac' property, but if user wants to
instantiate multiple such machines and connect them in one network, then
'mac' value also needs to be unique per this network. Thus, user have to
generate 'mac' from some <network host id> and <NIC id> parts and guest
should find network interface by mac address masked with <NIC id> part.
Itsn't as elegant as in examples above. Although, it's better than
nothing...

чт, 8 нояб. 2018 г. в 14:18, Artem Pisarenko <address@hidden>:

> Hi everyone,
>
> Is there are any way to make guest system able to identify specific
> instances of virtio devices as specified by qemu user (on command line or
> via qmp command)?
> More specifically, I'm interested in virtio-net devices.
> I know it's possible for some other devices:
> - virtserialport/virtconsole have 'name=<name>' property and guest
> application accesses serial device via "/dev/virtio-ports/<name>"
> - virtio-9p-pci/virtfs have 'mount_tag=<mount_tag>' and guest
> application mounts filesystem with "mount -t 9p -o trans=virtio <mount_tag>
> ..."
> But I cannot find any way to associate '-device virtio-net-pci' instances
> with eth<X> network interfaces in guest.
>
> Thanks in advance,
> Artem
>
>