xref: /freebsd/share/man/man4/hv_utils.4 (revision 0957b409)
1.\" $FreeBSD$
2.\"
3.\" Copyright (c) 2012 Microsoft Corp.
4.\" All rights reserved.
5.\"
6.\" Redistribution and use in source and binary forms, with or without
7.\" modification, are permitted provided that the following conditions
8.\" are met:
9.\" 1. Redistributions of source code must retain the above copyright
10.\"    notice, this list of conditions and the following disclaimer.
11.\" 2. Redistributions in binary form must reproduce the above copyright
12.\"    notice, this list of conditions and the following disclaimer in the
13.\"    documentation and/or other materials provided with the distribution.
14.\"
15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25.\" SUCH DAMAGE.
26.\"
27.Dd September 10, 2013
28.Dt HYPER-V 4
29.Os
30.Sh NAME
31.Nm hv_utils
32.Nd Hyper-V Utilities Driver
33.Sh SYNOPSIS
34To compile this driver into the kernel, place the following lines in
35the system kernel configuration file:
36.Bd -ragged -offset indent
37.Cd "device hyperv"
38.Ed
39.Sh DESCRIPTION
40The
41.Nm
42driver provides time keeping, shutdown and heartbeat
43functionality for
44.Fx
45guest partitions running on Hyper-V.
46Hyper-V is a hypervisor-based virtualization technology from Microsoft.
47The
48.Nm
49driver is one of the core drivers required to be present in guest
50partitions running on Hyper-V.
51This driver provides the following
52functionalities to guest partitions:
53.Pp
54(a) Time Keeping: The clock inside the guest partition will remain accurate by
55synchronizing to the clock on the virtualization server via Timesync service,
56and with the help of the pluggable time source device.
57.Pp
58(b) Integrated shutdown: Guest partitions running
59.Fx
60can be shut down from
61Hyper-V Manager console by using the
62.Qq Shut down
63command.
64.Pp
65(c) Heartbeat: This feature allows the virtualization server to detect whether
66the guest partition is running and responsive.
67.Sh SEE ALSO
68.Xr hv_ata_pci_disengage 4 ,
69.Xr hv_netvsc 4 ,
70.Xr hv_storvsc 4 ,
71.Xr hv_vmbus 4
72.Sh HISTORY
73Support for
74.Nm
75first appeared in
76.Fx 10.0 .
77The driver was developed through a joint effort between Citrix Incorporated,
78Microsoft Corporation, and Network Appliance Incorporated.
79.Sh AUTHORS
80.An -nosplit
81.Fx
82support for
83.Nm
84was first added by
85.An Microsoft BSD Integration Services Team Aq Mt bsdic@microsoft.com .
86