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.\" Copyright (c) 2006, 2008 Stanislav Sedov <stas@FreeBSD.org>.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd August 4, 2008
.Dt CPUCONTROL 8
.Os
.Sh NAME
.Nm cpucontrol
.Nd control utility for the
.Xr cpuctl 4
device.
.Sh SYNOPSIS
.Nm
.Op Fl vh
.Fl m Ar msr Ns Op = Ns Ar value
.Bk
.Ar device
.Ek
.Nm
.Op Fl vh
.Fl i Ar level
.Bk
.Ar device
.Ek
.Nm
.Op Fl vh
.Op Fl d Ar datadir
.Fl u
.Bk
.Ar device
.Ek
.Sh DESCRIPTION
The
.Nm
utility can be used to read and write arbitrary machine-specific
CPU registers via the
.Xr cpuctl 4
special device.
It can also be used to apply CPU firmware updates.
.Pp
The following options are available:
.Bl -tag -width indent
.It Fl d Ar datadir
Where to look for microcode images.
The option can be specified multiple times.
.It Fl m Ar msr Ns Op = Ns Ar value
Read/write the specified MSR.
Both the MSR and the value should be given as a hex number.
.It Fl i Ar level
Retrieve CPUID info.
Level should be given as a hex number.
.It Fl u
Apply CPU firmware updates.
The
.Nm
utility will walk through the configured data directories
and apply all firmware updates available for this CPU.
.It Fl v
Increase the verbosity level.
.It Fl h
Show help message.
.El
.Sh EXIT STATUS
.Ex -std
.Sh EXAMPLES
The command
.Pp
.Dq Li "cpucontrol -m 0x10 /dev/cpuctl0"
.Pp
will read the contents of TSC MSR from CPU 0.
.Pp
To set the CPU 0 TSC MSR register value to 0x1 issue
.Pp
.Dq Li "cpucontrol -m 0x10=0x1 /dev/cpuctl0"
.Pp
The command
.Pp
.Dq Li "cpucontrol -i 0x1 /dev/cpuctl1"
.Pp
will retrieve the CPUID level 0x1 from CPU 1.
.Pp
To perform firmware updates on CPU 0 from images located at
.Pa /usr/local/share/cpuctl/
use the following command:
.Pp
.Dq Li "cpucontrol -d /usr/local/share/cpuctl/ -u /dev/cpuctl0"
.Sh SEE ALSO
.Xr cpuctl 4
.Sh HISTORY
The
.Nm
utility first appeared in
.Fx 8.0 .
.Sh BUGS
Yes, probably, report if any.
.Sh AUTHORS
The
.Nm
utility and this manual page was written by
.An Stanislav Sedov Aq stas@FreeBSD.org .
|
