PMU_FL_MEM_LOADS_AUX
if (!(x86_pmu.flags & PMU_FL_MEM_LOADS_AUX))
return x86_pmu.flags & PMU_FL_MEM_LOADS_AUX ? attr->mode : 0;
x86_pmu.flags |= PMU_FL_MEM_LOADS_AUX;
x86_pmu.flags |= PMU_FL_MEM_LOADS_AUX;