Re: intel_pstate divide error with v3.13-rc4-256-gb7000ad

[Paolo Bonzini]

Il 03/01/2014 21:00, Dirk Brandewie ha scritto:
> +    case MSR_IA32_MPERF:
> +    case MSR_IA32_APERF:

These should never be accessed.  A KVM VM will always have
CPUID[06H].ECX = 0, and the Intel manual says that the MSRs are only
present if CPUID returns that value with bit 0 set.

I think the actual bug is that intel_pstate_init does not check the
feature bits in CPUID (either manually or via x86_match_cpu).

Paolo
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