// SPDX-License-Identifier: GPL-2.0+/* * debugfs file to track time spent in suspend * * Copyright (c) 2011, Google, Inc. */ #include <linux/debugfs.h>#include <linux/err.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/seq_file.h>#include <linux/suspend.h>#include <linux/time.h> #include "timekeeping_internal.h" #define NUM_BINS 32 /* Incremented every time mg_floor is updated */DEFINE_PER_CPU(unsigned long, timekeeping_mg_floor_swaps); static unsigned int sleep_time_bin[NUM_BINS] = {0}; static int tk_debug_sleep_time_show(struct seq_file *s, void *data){	unsigned int bin;	seq_puts(s, "      time (secs)        count\n");	seq_puts(s, "------------------------------\n");	for (bin = 0; bin < 32; bin++) {		if (sleep_time_bin[bin] == 0)			continue;		seq_printf(s, "%10u - %-10u %4u\n",			bin ? 1 << (bin - 1) : 0, 1 << bin,				sleep_time_bin[bin]);	}	return 0;}DEFINE_SHOW_ATTRIBUTE(tk_debug_sleep_time); static int __init tk_debug_sleep_time_init(void){	debugfs_create_file("sleep_time", 0444, NULL, NULL,			    &tk_debug_sleep_time_fops);	return 0;}late_initcall(tk_debug_sleep_time_init); void tk_debug_account_sleep_time(const struct timespec64 *t){	/* Cap bin index so we don't overflow the array */	int bin = min(fls(t->tv_sec), NUM_BINS-1); 	sleep_time_bin[bin]++;	pm_deferred_pr_dbg("Timekeeping suspended for %lld.%03lu seconds\n",			   (s64)t->tv_sec, t->tv_nsec / NSEC_PER_MSEC);} unsigned long timekeeping_get_mg_floor_swaps(void){	unsigned long sum = 0;	int cpu; 	for_each_possible_cpu(cpu)		sum += data_race(per_cpu(timekeeping_mg_floor_swaps, cpu)); 	return sum;}