static int nds32_pmu_map_cache_event()

in kernel/perf_event_cpu.c [41:66]

• 20 lines of code
• 5 McCabe index (conditional complexity)

static int nds32_pmu_map_cache_event(const unsigned int (*cache_map)
				  [PERF_COUNT_HW_CACHE_MAX]
				  [PERF_COUNT_HW_CACHE_OP_MAX]
				  [PERF_COUNT_HW_CACHE_RESULT_MAX], u64 config)
{
	unsigned int cache_type, cache_op, cache_result, ret;

	cache_type = (config >> 0) & 0xff;
	if (cache_type >= PERF_COUNT_HW_CACHE_MAX)
		return -EINVAL;

	cache_op = (config >> 8) & 0xff;
	if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX)
		return -EINVAL;

	cache_result = (config >> 16) & 0xff;
	if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
		return -EINVAL;

	ret = (int)(*cache_map)[cache_type][cache_op][cache_result];

	if (ret == CACHE_OP_UNSUPPORTED)
		return -ENOENT;

	return ret;
}