Re: [RFT] Fix for unhandled msr c0000081 problems under Intel cpus

Ingo Molnar
2006-12-28T14:58:25Z

* Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org> wrote:

> >actually, those MSRs are really architecture-defined for P6 family
> >CPUs. So KVM/qemu should at least fake something there, or ignore it.
> >These MSRs might be ticked by various existing kernels and
> >distributions. Performance counters are ignored at the moment?
>
> They are unimplemented, and tricky to implement. Just swallowing the
> wrmsr is easy, but it won't do the expected thing, whatever that is.

the expected thing is to get periodic watchdog NMIs injected - but it's
not a big problem if that doesnt work, the watchdog code detects that.
Crashing during bootup isnt too sexy though.

Ingo