kdb: add rdmsr and wrmsr commands for i386

Bernardo Innocenti bernie at codewiz.org
Thu May 17 02:36:21 EDT 2007

Keith Owens wrote:

> Before using MSR, you must first check that the cpu supports the
> instruction, rd/wrmsr cause an oops on 486 or earlier.  Also using an
> invalid msr number causes an oops, so use rd/wrmsr_safe().

I didn't bother implementing those checks because kdb recovers
nicely from GPF anyway.  It's the valid MSR writes that could
cause unrecoveable problems! :)

   // Bernardo Innocenti
 \X/  http://www.codewiz.org/

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