1.\" $NetBSD: cpuctl.8,v 1.9 2012/03/15 22:35:03 njoly Exp $ 2.\" 3.\" Copyright (c) 2007, 2008, 2012 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Andrew Doran. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd January 13, 2012 31.Dt CPUCTL 8 32.Os 33.Sh NAME 34.Nm cpuctl 35.Nd program to control CPUs 36.Sh SYNOPSIS 37.Nm cpuctl 38.Ar command 39.Op Ar arguments 40.Sh DESCRIPTION 41The 42.Nm 43command can be used to control and inspect the state of CPUs in the system. 44.Pp 45The first argument, 46.Ar command , 47specifies the action to take. 48Valid commands are: 49.Bl -tag -width XofflineXcpunoX 50.It identify Ar cpu 51Output information on the specified CPU's features and capabilities. 52Not available on all architectures. 53.It list 54For each CPU in the system, display the current state and time of the last 55state change. 56.It offline Ar cpuno 57Set the specified CPU off line. 58.Pp 59Unbound LWPs (lightweight processes) will not be executed on the CPU 60while it is off line. 61Bound LWPs will continue to be executed on the CPU, and device interrupts 62routed to the CPU will continue to be handled. 63A future release of the system may allow device interrupts to be re-routed 64away from individual CPUs. 65.Pp 66At least one CPU in the system must remain on line. 67.It online Ar cpuno 68Set the specified CPU on line, making it available to run unbound LWPs. 69.It ucode Op Ar file 70This applies the microcode patch on all CPUs. 71The default filename is used if no filename is specified. 72The 73.Cm identify 74command prints the installed version on that CPU. 75On success the 76.Cm identify 77command show different ucode versions before and after this command. 78.El 79.Sh FILES 80.Bl -tag -width /dev/cpuctl -compact 81.It Pa /dev/cpuctl 82control device 83.It Pa /libdata/firmware/x86/amd/ 84The directory to install the microcode file for AMD CPUs into. 85The default filename is 86.Pa microcode_amd.bin 87for CPU families 0x10 to 0x14. 88The default filename is 89.Pa microcode_amd_famXXh.bin 90where 91.Dv XX 92is the CPU family starting with 15 (hex). 93Get it from 94.Lk http://www.amd64.org/support/microcode.html 95.El 96.Sh EXAMPLES 97Run 98.Dl cpuctl identify 0 99and you should see something like this: 100.Bd -literal -offset indent 101cpu0: UCode version: 0x1000080 102.Ed 103.Pp 104After applying the microcode patch with 105.Dl cpuctl ucode 106you can see with 107.Dl cpuctl identify 0 108that the patch got applied: 109.Bd -literal -offset indent 110cpu0: UCode version: 0x1000083 111.Ed 112.Sh SEE ALSO 113.Xr psrset 8 , 114.Xr schedctl 8 115.Sh HISTORY 116The 117.Nm 118command first appeared in 119.Nx 5.0 . 120