lsmsr(8)lsmsr(8)NAMElsmsr - show MSR information for x86 CPUs
SYNOPSISlsmsr [-hv] [-a [-c cpu_nr] [-f family] [-l] [-r name|address] [-V ver‐
bosity] [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 sup‐
ported.
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 dis‐
played (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 debug‐
ging 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 informa‐
tion 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
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
Show 'MTRRcap MSR in verbose one-line mode
# lsmsr-r MTRRcap -V 1
MTRRcap = 0x0000000000000508 (MtrrCapVCnt=0x8, MtrrCapFix=0x1,
MtrrCapWc=0x1)
Show 'MTRRdefType' in verbose multi-line mode
# lsmsr-r MTRRdefType -V 3
MTRRdefType = 0x0000000000000c00
MtrrDefMemType=0
MtrrDefTypeFixEn=0x1
MtrrDefTypeEn=0x1
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
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 BUGS
Please send bug reports to <andreas.herrmann3@amd.com>.
x86utils July 2008 lsmsr(8)
