ARMPMU_EVT_64BIT
if (event->hw.flags & ARMPMU_EVT_64BIT)
event->hw.flags |= ARMPMU_EVT_64BIT;
if (event->hw.flags & ARMPMU_EVT_64BIT)
static_assert((PERF_EVENT_FLAG_ARCH & ARMPMU_EVT_64BIT) == ARMPMU_EVT_64BIT);