2011-11-27 02:36:14 +04:00
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.\" $NetBSD: virtio.4,v 1.4 2011/11/26 22:36:14 wiz Exp $
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2011-11-05 13:22:43 +04:00
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.\"
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.\" Copyright (c) 2011 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd November 5, 2011
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.Dt VIRTIO 4
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.Os
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.Sh NAME
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.Nm virtio
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2011-11-06 21:31:19 +04:00
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.Nd Para-virtualized I/O in a virtual machine
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.Sh SYNOPSIS
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.Cd "virtio* at pci? dev ? function ?"
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.Cd "ld* at virtio?"
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.Cd "vioif* at virtio?"
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.Cd "viomb* at virtio?"
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.Sh DESCRIPTION
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.Nm
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defines an interface for efficient, standard and extensible I/O between the
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hypervisor and the virtual machine.
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The
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.Nm
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device driver represents an emulated PCI device that the hypervisor makes
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available to the virtual machine.
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.Pp
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.Nm
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2011-11-26 19:04:45 +04:00
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driver itself provides the core infrastructure to communicate
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with the hypervisor (called virtqueues) and supports the following devices:
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2011-11-05 13:22:43 +04:00
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.Bl -tag -width xxxxx
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.It Xr ld 4
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A Disk device.
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.It Xr vioif 4
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An Ethernet device.
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.It Xr viomb 4
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A pseudo-device to release memory back to the hypervisor.
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.El
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.Sh SEE ALSO
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2011-11-26 19:04:45 +04:00
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.Xr ld 4 ,
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.Xr pci 4 ,
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.Xr vioif 4 ,
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.Xr viomb 4
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2011-11-26 19:04:45 +04:00
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.Pp
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.Rs
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.%A Rusty Russell, IBM Corporation
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.%T Virtio PCI Card Specification
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.%O http://ozlabs.org/~rusty/virtio-spec/
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.Re
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2011-11-05 13:22:43 +04:00
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Nx 6.0 .
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