Re: Access MSR functions in userspace?

[H. Peter Anvin]

Maxim Levitsky wrote:
> On Wednesday, 6 February 2008 05:29:47 Hasan Rashid wrote:
> > Is there a way to use RDMSR and WRMSR in userspace? I only need to write
> > to one register, writing a module with a userspace piece to handle that
> > seems like an over kill.
> >
> > TIA!
>
>
> Fortunately linux have /dev/cpu/*/msr
> Take  look at $LINUX_SOURCES/arch/x86/kernel/msr.c to learn how to use it.

You might also find these useful:

http://www.kernel.org/pub/linux/utils/cpu/msr-tools/msr-tools-1.1.2.tar.bz2

	-hpa
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