New CPUID/MSR driver; virtualization hooks

Jeremy Fitzhardinge jeremy at xensource.com
Thu Apr 5 15:19:39 PDT 2007


H. Peter Anvin wrote:
> Yes, pretty much.  There are enough evidence that you can't trust CPU 
> architecture to stay sane.  Inside Transmeta it was a constant battle, 
> and we were a small company.
>   

Is there any indication that the msr or cpuid instructions will change
in this way?  rd/wrmsr is pretty explicitly documented as taking the msr
in %ecx, and the value in %edx:eax; do you think that will change?  And
likewise cpuid?

    J



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