LXR linux/include/linux/sched/cpufreq.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_SCHED_CPUFREQ_H
   3#define _LINUX_SCHED_CPUFREQ_H
   4
   5#include <linux/types.h>
   6
   7/*
   8 * Interface between cpufreq drivers and the scheduler:
   9 */
  10
  11#define SCHED_CPUFREQ_IOWAIT    (1U << 0)
  12#define SCHED_CPUFREQ_MIGRATION (1U << 1)
  13
  14#ifdef CONFIG_CPU_FREQ
  15struct cpufreq_policy;
  16
  17struct update_util_data {
  18       void (*func)(struct update_util_data *data, u64 time, unsigned int flags);
  19};
  20
  21void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data,
  22                       void (*func)(struct update_util_data *data, u64 time,
  23                                    unsigned int flags));
  24void cpufreq_remove_update_util_hook(int cpu);
  25bool cpufreq_this_cpu_can_update(struct cpufreq_policy *policy);
  26
  27static inline unsigned long map_util_freq(unsigned long util,
  28                                        unsigned long freq, unsigned long cap)
  29{
  30        return (freq + (freq >> 2)) * util / cap;
  31}
  32#endif /* CONFIG_CPU_FREQ */
  33
  34#endif /* _LINUX_SCHED_CPUFREQ_H */
  35