MSR_AMD_F15H_PERF_EVTSEL0
case MSR_AMD_F15H_PERF_EVTSEL0:
return ((msr - MSR_AMD_F15H_PERF_EVTSEL0) / 2);
case MSR_AMD_F15H_PERF_EVTSEL0:
#define MSR_CPC_EXTD_EVTSEL(idx) (MSR_AMD_F15H_PERF_EVTSEL0 + (idx * 2))