Re: [PATCH V6 2/5] perf/x86/kvm: Avoid unnecessary work in guest filtering

[Andi Kleen]

> As my understanding, the microcode version for each stepping is independent
> and irrelevant. The 0x0000004e should be just coincidence.
> If so, I don't think X86_STEPPING_ANY is very useful.
> 
> Andi, if I'm wrong please correct me.

Yes that's right. You cannot match microcode without stepping.

-Andi