Re: vfio usage in a vm
On 6/12/24 20:24, daggs via Users wrote:
Greetings,
I wanted to know if it is possible to attach a virtual nic (shows up as 02:01.0 Ethernet
controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter
(rev 20)) to the vfio module, when I modprobe it I get this error:
[ 854.624668] vfio-pci: probe of 0000:02:01.0 failed with error -22
No, you need to declare the vNIC with model 'virtio':
<interface type='network'>
<mac address='52:54:00:XX:XX:XX'/>
<source network='default'/>
<model type='virtio'/>
</interface>
Virtio is an interface that allows more effective data transfer between
host and guest [1][2]. It's a paravirtualized device. In other words, if
you started a guest and told hypervisor to emulate RTL8139 NIC then
it'll do just that.
1: https://wiki.osdev.org/Virtio
2: https://wiki.libvirt.org/Virtio.html
Michal