ttbr_write_retired  609 arch/arm/kernel/perf_event_v7.c ARMV7_EVENT_ATTR(ttbr_write_retired, ARMV7_PERFCTR_TTBR_WRITE);
ttbr_write_retired  193 arch/arm64/kernel/perf_event.c ARMV8_EVENT_ATTR(ttbr_write_retired, ARMV8_PMUV3_PERFCTR_TTBR_WRITE_RETIRED);