armv8pmu_read_evcntr 418 arch/arm64/kernel/perf_event.c val = armv8pmu_read_evcntr(idx); armv8pmu_read_evcntr 420 arch/arm64/kernel/perf_event.c val = (val << 32) | armv8pmu_read_evcntr(idx - 1);