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The wiki is being retired!

Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to Contributions welcome!

msrtool is a small utility that dumps chipset-specific MSR registers.

Supported OSes and chipsets


  • Linux with /dev/cpu/*/msr
  • Darwin / OS X with DirectIO
  • FreeBSD with /dev/cpuctl*


  • AMD Geode GX2
  • AMD Geode LX
  • AMD Geode CS5536
  • AMD K8
  • Intel Pentium III and later


Manual installation

$ git clone
$ cd coreboot/util/msrtool
$ ./configure
$ make
$ sudo make install

You can browse the msrtool source code in cgit.


Show basic information:

$ msrtool

Please see msrtool -h for information on various other options.

Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.