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VIRTIO(4) Device Drivers Manual VIRTIO(4)

virtio
VirtIO support driver

virtio* at fdt?
virtio* at pci?

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
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 not supported, yet.

intro(4)

The virtio driver first appeared in OpenBSD 5.3.

The virtio driver was ported to OpenBSD and improved by Stefan Fritsch <sf@sfritsch.de>. It is based on the NetBSD driver by Minoura Makoto.
March 24, 2017 OpenBSD-6.1