VIO(4) FreeBSD Kernel Interfaces Manual VIO(4)
NAME
vio - VirtIO network device
SYNOPSIS
vio* at virtio? flags 0x00
DESCRIPTION
The vio driver provides support for the virtio(4) network interface
provided by bhyve, KVM, QEMU, VirtualBox, and vmd(8).
Setting the bit 0x2 in the flags disables the RingEventIndex feature.
This can be tried as a workaround for possible bugs in host
implementations of vio at the cost of slightly reduced performance.
Setting the bit 0x100 in the flags forces the interface to be always in
promiscuous mode. This can be used as a workaround for a bug in QEMU
before version 1.7.2 that prevents packets with a VLAN tag from being
sent to the guest.
SEE ALSO
intro(4), virtio(4)
HISTORY
The vio driver first appeared in OpenBSD 5.3.
AUTHORS
The vio driver was ported to OpenBSD and improved by Stefan Fritsch
<
[email protected]>. It is based on the NetBSD vioif driver by Minoura
Makoto.
FreeBSD 14.1-RELEASE-p8 May 24, 2021 FreeBSD 14.1-RELEASE-p8