2017-11-27 16:28:28 +00:00
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.\" Copyright (c) 2013 Peter Grehan
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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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 19, 2013
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.Dt VMM 4
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.Os
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.Sh NAME
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.Nm vmm.ko
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.Nd "bhyve virtual machine monitor"
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.Sh SYNOPSIS
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To load the driver as a module at boot, add this line to
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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.Cd vmm_load="YES"
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.Ed
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.Pp
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The module can also be loaded manually with
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.Xr kldload 8 :
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.Bd -literal -offset indent
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kldload vmm
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.Ed
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.Sh DESCRIPTION
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.Nm
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provides the kernel portion of the
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.Xr bhyve 4
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2019-02-23 09:34:57 +00:00
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hypervisor.
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2017-11-27 16:28:28 +00:00
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.Pp
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An Intel CPU with VT-x/EPT or AMD CPU with SVM support is required.
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.Pp
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PCI device passthrough to a virtual machine requires
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hardware with VT-d support.
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.Sh PCI PASSTHROUGH
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When the hardware supports VT-d, and
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.Nm
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has been loaded at boot time,
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PCI devices can be reserved for use by the hypervisor.
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Entries consisting of the PCI
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.Ar bus Ns / Ns Ar slot Ns / Ns Ar function
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are added to the
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.Va pptdevs
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.Xr loader.conf 5
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variable.
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Additional entries are separated by spaces.
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Host PCI devices that match an entry will be assigned to the hypervisor
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and will not be probed by
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.Fx
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device drivers.
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See the
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.Sx EXAMPLES
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section below for sample usage.
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.Pp
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A large number of PCI device entries may require a string longer than the
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128-character limit of
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.Xr loader.conf 5
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variables.
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The
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.Va pptdevs2
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and
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.Va pptdevs3
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variables can be used for additional entries.
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.Sh EXAMPLES
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Reserve three PCI devices for use by the hypervisor: bus 10 slot 0 function 0,
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bus 6 slot 5 function 0, and bus 6 slot 5 function 1.
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.Bd -literal -offset indent
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pptdevs="10/0/0 6/5/0 6/5/1"
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.Ed
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.Sh SEE ALSO
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.Xr bhyve 4 ,
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.Xr loader.conf 5 ,
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.Xr bhyve 8 ,
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.Xr bhyveload 8 ,
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.Xr kldload 8
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.Sh HISTORY
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.Nm vmm.ko
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first appeared in
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.Fx 10.0 .
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.Sh AUTHORS
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.An Neel Natu Aq neel@freebsd.org
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.An Peter Grehan Aq grehan@freebsd.org
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