drivers/virtio_net/virtio_net.conf

   1 service virtio_net
   2 {
   3         type    net;
   4         descr   "Virtio network device";
   5         system
   6                 UMAP
   7                 VUMAP
   8                 IRQCTL
   9                 DEVIO
  10         ;
  11
  12         pci device      1af4/1000;
  13 }