virtio4

Usage

Overview

The virtio driver provides support service for paravirtualized devices using the VirtIO protocol. Such devices are provided by bhyve, KVM, QEMU, VirtualBox, and vmm(4).

Currently there are drivers for the following virtio devices:

vio(4)

VirtIO network device

vioblk(4)

VirtIO disk

viocon(4)

VirtIO console device

viogpu(4)

VirtIO GPU device

viomb(4)

VirtIO memory ballooning driver

viornd(4)

VirtIO random number device

vioscsi(4)

VirtIO SCSI adapter

vmmci(4)

vmm(4) control interface

The virtio driver conforms to the virtio 0.9.5 specification. The virtio 1.0 standard is only supported for PCI devices.

By default 1.x is preferred over 0.9. This can be changed by setting the bit 0x8 in the flags.