VIRTIO(4)

VIRTIO(4) | Kernel Interfaces Manual | VIRTIO(4)

# NAME

virtio — Para-virtualized I/O in a virtual machine

# SYNOPSIS

virtio* at pci? dev ? function ?
ld* at virtio?
vioif* at virtio?
viomb* at virtio?

# DESCRIPTION

virtio defines an interface for efficient, standard and extensible I/O between the hypervisor and the virtual machine. The virtio device driver represents an emulated PCI device that the hypervisor makes available to the virtual machine.

virtio driver itself provides the core infrastructure to communicate with the hypervisor (called virtqueues) and supports the following devices:

ld(4)
  A Disk device.
vioif(4)
  An Ethernet device.
viomb(4)
  A pseudo-device to release memory back to the hypervisor.

# SEE ALSO

ld(4), pci(4), vioif(4), viomb(4)

Rusty Russell, IBM Corporation, Virtio PCI Card Specification, http://ozlabs.org/~rusty/virtio-spec/.

# HISTORY

The virtio driver first appeared in NetBSD 6.0.

November 5, 2011 | NetBSD 7.0