110b59a9bSPeter Grehan.\" Copyright (c) 2011 Bryan Venteicher 210b59a9bSPeter Grehan.\" All rights reserved. 310b59a9bSPeter Grehan.\" 410b59a9bSPeter Grehan.\" Redistribution and use in source and binary forms, with or without 510b59a9bSPeter Grehan.\" modification, are permitted provided that the following conditions 610b59a9bSPeter Grehan.\" are met: 710b59a9bSPeter Grehan.\" 1. Redistributions of source code must retain the above copyright 810b59a9bSPeter Grehan.\" notice, this list of conditions and the following disclaimer. 910b59a9bSPeter Grehan.\" 2. Redistributions in binary form must reproduce the above copyright 1010b59a9bSPeter Grehan.\" notice, this list of conditions and the following disclaimer in the 1110b59a9bSPeter Grehan.\" documentation and/or other materials provided with the distribution. 1210b59a9bSPeter Grehan.\" 1310b59a9bSPeter Grehan.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1410b59a9bSPeter Grehan.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1510b59a9bSPeter Grehan.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1610b59a9bSPeter Grehan.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1710b59a9bSPeter Grehan.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1810b59a9bSPeter Grehan.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 1910b59a9bSPeter Grehan.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2010b59a9bSPeter Grehan.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2110b59a9bSPeter Grehan.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2210b59a9bSPeter Grehan.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2310b59a9bSPeter Grehan.\" SUCH DAMAGE. 2410b59a9bSPeter Grehan.\" 2510b59a9bSPeter Grehan.\" $FreeBSD$ 2610b59a9bSPeter Grehan.\" 27*28083eaaSChristian Brueffer.Dd January 22, 2012 2810b59a9bSPeter Grehan.Dt VIRTIO_BLK 4 2910b59a9bSPeter Grehan.Os 3010b59a9bSPeter Grehan.Sh NAME 3110b59a9bSPeter Grehan.Nm virtio_blk 3210b59a9bSPeter Grehan.Nd VirtIO Block driver 3310b59a9bSPeter Grehan.Sh SYNOPSIS 3410b59a9bSPeter GrehanTo compile this driver into the kernel, 3510b59a9bSPeter Grehanplace the following lines in your 3610b59a9bSPeter Grehankernel configuration file: 3710b59a9bSPeter Grehan.Bd -ragged -offset indent 3810b59a9bSPeter Grehan.Cd "device virtio_blk" 3910b59a9bSPeter Grehan.Ed 4010b59a9bSPeter Grehan.Pp 4110b59a9bSPeter GrehanAlternatively, to load the driver as a 4210b59a9bSPeter Grehanmodule at boot time, place the following line in 4310b59a9bSPeter Grehan.Xr loader.conf 5 : 4410b59a9bSPeter Grehan.Bd -literal -offset indent 4510b59a9bSPeter Grehanvirtio_blk_load="YES" 4610b59a9bSPeter Grehan.Ed 4710b59a9bSPeter Grehan.Sh DESCRIPTION 4810b59a9bSPeter GrehanThe 4910b59a9bSPeter Grehan.Nm 5010b59a9bSPeter Grehandevice driver provides support for VirtIO block devices. 5110b59a9bSPeter Grehan.Sh LOADER TUNABLES 5210b59a9bSPeter GrehanTunables can be set at the 5310b59a9bSPeter Grehan.Xr loader 8 5410b59a9bSPeter Grehanprompt before booting the kernel or stored in 5510b59a9bSPeter Grehan.Xr loader.conf 5 . 5610b59a9bSPeter Grehan.Bl -tag -width "xxxxxx" 5710b59a9bSPeter Grehan.It Va hw.vtblk.no_ident 5810b59a9bSPeter GrehanThis tunable disables retrieving the device identification string 59*28083eaaSChristian Bruefferfrom the hypervisor. 60*28083eaaSChristian BruefferThe default value is 0. 6110b59a9bSPeter Grehan.El 6210b59a9bSPeter Grehan.Sh SEE ALSO 6310b59a9bSPeter Grehan.Xr virtio 4 6410b59a9bSPeter Grehan.Sh HISTORY 6510b59a9bSPeter GrehanThe 6610b59a9bSPeter Grehan.Nm 6710b59a9bSPeter Grehandriver was written by 6810b59a9bSPeter Grehan.An Bryan Venteicher Aq bryanv@daemoninthecloset.org . 6910b59a9bSPeter GrehanIt first appeared in 7010b59a9bSPeter Grehan.Fx 9.0 . 71