exc_return        562 arch/arm/kernel/perf_event_v7.c ARMV7_EVENT_ATTR(exc_return, ARMV7_PERFCTR_EXC_EXECUTED);
exc_return        175 arch/arm64/kernel/perf_event.c ARMV8_EVENT_ATTR(exc_return, ARMV8_PMUV3_PERFCTR_EXC_RETURN);