.nr X lsmsr - Online Linux Manual PageSection : 8
Updated : July 2008
Source : x86utils
NAMElsmsr − show MSR information for x86 CPUs
SYNOPSISlsmsr [−hv] [−a [−c cpu_nr] [−f family] [−l] [−r name|address] [−V verbosity] [MSR]
DESCRIPTIONlsmsr is a tool to display information for machine specific registers of x86 CPUs. Following CPUs are supported: AMD family 0xf and family 0x10. For Intel and other AMD CPUs just a some common MSRs is supported.
OPTIONS-a, --all  Show information for all MSRs known to the tool for that CPU family. -c cpu_nr, --cpu cpu_nr  Select CPU (by number) for which MSR information should be displayed (default: 0). -f fam, --family fam  Specify CPU family. Normally CPU family is auto-detected. You can use this option to disable auto-detection, e.g. for debugging purposes. -l, --list  Show definition (address, field description) of selected MSR(s). -r name|address, --register name|address  Specify MSR (by name or address in hex) for which MSR information should be displayed. -V num, --verbosity num  Select verbosity of output format (between 0 and 4, default: 0) -h, --help  Print help message and exit. -v, --version  Display version info and exit.
Examples.IP "" 0 Show all MSRs beginning with 'MTRR' and force CPU family to 0x10  # lsmsr -l -f 0x10 MTRR
 MTRRcap : 0x000000fe
 MTRRphysBase0 : 0x00000200
 MTRRphysMask0 : 0x00000201
 MTRRphysBase1 : 0x00000202
 MTRRphysMask1 : 0x00000203
 MTRRphysBase2 : 0x00000204
 MTRRphysMask2 : 0x00000205
 MTRRphysBase3 : 0x00000206
 MTRRphysMask3 : 0x00000207
 MTRRphysBase4 : 0x00000208
 MTRRphysMask4 : 0x00000209
 MTRRphysBase5 : 0x0000020a
 MTRRphysMask5 : 0x0000020b
 MTRRphysBase6 : 0x0000020c
 MTRRphysMask6 : 0x0000020d
 MTRRphysBase7 : 0x0000020e
 MTRRphysMask7 : 0x0000020f
 MTRRfix64K_00000 : 0x00000250
 MTRRfix16K_80000 : 0x00000258
 MTRRfix16K_A0000 : 0x00000259
 MTRRfix4K_C0000 : 0x00000268
 MTRRfix4K_C8000 : 0x00000269
 MTRRfix4K_D0000 : 0x0000026a
 MTRRfix4K_D8000 : 0x0000026b
 MTRRfix4K_E0000 : 0x0000026c
 MTRRfix4K_E8000 : 0x0000026d
 MTRRfix4K_F0000 : 0x0000026e
 MTRRfix4K_F8000 : 0x0000026f
 MTRRdefType : 0x000002ff .IP ""0 Show 'MTRRcap MSR in verbose one-line mode  # lsmsr -r MTRRcap -V 1
 MTRRcap = 0x0000000000000508 (MtrrCapVCnt=0x8, MtrrCapFix=0x1, MtrrCapWc=0x1) .IP "" 0 Show 'MTRRdefType' in verbose multi-line mode  # lsmsr -r MTRRdefType -V 3
 MTRRdefType = 0x0000000000000c00
   MtrrDefMemType=0
   MtrrDefTypeFixEn=0x1
   MtrrDefTypeEn=0x1 .IP "" 0 Show definition of MSR 0x200 in verbose multi-line mode (including reserved fields)  # lsmsr -r 0x200 -V 4 -l
 MTRRphysBase0: 0x00000200
   0-7:Type
   8-11:res
   12-39:PhyBase
   40-63:res .IP "" 0 List all known MSRs for family 0xf  # lsmsr -f 0xf -l -a
 TSC : 0x00000010; time-stamp counter
 APIC_BASE : 0x0000001b; APIC base address
 ...
 MTRRphysBase0 : 0x00000200; base of variable MTRR (0)
 MTRRphysMask0 : 0x00000201; mask of variable MTRR (0)
 MTRRphysBase1 : 0x00000202; base of variable MTRR (1)
 MTRRphysMask1 : 0x00000203; mask of variable MTRR (1)
 ...
 MTRRfix4K_F0000 : 0x0000026e
 MTRRfix4K_F8000 : 0x0000026f
 PAT : 0x00000277; page attribute table
 MTRRdefType : 0x000002ff
Authorlsmsr and this manual page was written by Andreas Herrmann <andreas.herrman3@amd.com>. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License version 2.
REPORTING BUGSPlease send bug reports to <andreas.herrmann3@amd.com>. 0
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