Re: [RFC PATCH 39/41] KVM: x86/pmu: Implement emulated counter increment for passthrough PMU

[Sean Christopherson]

On Thu, Apr 11, 2024, Sean Christopherson wrote:
> > +	struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
> > +	int bit;
> > +
> > +	for_each_set_bit(bit, pmu->incremented_pmc_idx, X86_PMC_IDX_MAX) {
> 
> I don't love the "incremented_pmc_idx" name.  It's specifically for emulated
> events, that should ideally be clear in the name.
> 
> And does the tracking the emulated counters actually buy anything?  Iterating
> over all PMCs and checking emulated_counter doesn't seem like it'd be measurably
> slow, especially not when this path is likely writing multiple MSRs.
> 
> Wait, why use that and not reprogram_pmi?

If the name is a sticking point, just rename it to something generic, e.g.
dirty_pmcs or something.