Messages in this thread | | | Date | Fri, 14 Mar 2014 10:57:58 -0600 | From | David Ahern <> | Subject | Re: [PATCH] perf/x86/intel: Use rdmsrl_safe when initializing RAPL PMU. |
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On 3/14/14, 10:17 AM, Andi Kleen wrote: >> The Intel ISR section for RDMSR seems to say: "Specifying a reserved >> or unimplemented >> MSR address in ECX will also cause a general protection exception". >> >> From a guest's perspective, MSR_RAPL_POWER_UNIT is unimplemented; kvm matches >> this behavior. > > MSRs are model specific and defined per model number. If you report a model > number you're expected to implement the MSRs defined for that model number. > > AFAIK Xen just reports 0 for unknown MSRs (and I'm surprised KVM doesn't too) > > I would suggest to fix KVM.
I believe ignore_msrs parameter to kvm handles that.
David
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