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Revision 1.4, Sat Nov 26 22:36:14 2011 UTC (12 years, 4 months ago) by wiz
Branch: MAIN
CVS Tags: netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus
Branch point for: netbsd-5
Changes since 1.3: +7 -7 lines 

Various improvements.

.\"	$NetBSD: virtio.4,v 1.4 2011/11/26 22:36:14 wiz Exp $
.\"
.\" Copyright (c) 2011 The NetBSD Foundation, Inc.
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.Dd November 5, 2011
.Dt VIRTIO 4
.Os
.Sh NAME
.Nm virtio
.Nd Para-virtualized I/O in a virtual machine
.Sh SYNOPSIS
.Cd "virtio* at pci? dev ? function ?"
.Cd "ld* at virtio?"
.Cd "vioif* at virtio?"
.Cd "viomb* at virtio?"
.Sh DESCRIPTION
.Nm
defines an interface for efficient, standard and extensible I/O between the
hypervisor and the virtual machine.
The
.Nm
device driver represents an emulated PCI device that the hypervisor makes
available to the virtual machine.
.Pp
.Nm
driver itself provides the core infrastructure to communicate
with the hypervisor (called virtqueues) and supports the following devices:
.Bl -tag -width xxxxx
.It Xr ld 4
A Disk device.
.It Xr vioif 4
An Ethernet device.
.It Xr viomb 4
A pseudo-device to release memory back to the hypervisor.
.El
.Sh SEE ALSO
.Xr ld 4 ,
.Xr pci 4 ,
.Xr vioif 4 ,
.Xr viomb 4
.Pp
.Rs
.%A Rusty Russell, IBM Corporation
.%T Virtio PCI Card Specification
.%O http://ozlabs.org/~rusty/virtio-spec/
.Re
.Sh HISTORY
The
.Nm
driver first appeared in
.Nx 6.0 .