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
  13 #ifdef CONFIG_CPU_FREQ
  14 struct cpufreq_policy;
  15
  16 struct update_util_data {
  17        void (*func)(struct update_util_data *data, u64 time, unsigned int flags);
  18 };
  19
  20 void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data,
  21                        void (*func)(struct update_util_data *data, u64 time,
  22                                     unsigned int flags));
  23 void cpufreq_remove_update_util_hook(int cpu);
  24 bool cpufreq_this_cpu_can_update(struct cpufreq_policy *policy);
  25
  26 static inline unsigned long map_util_freq(unsigned long util,
  27                                         unsigned long freq, unsigned long cap)
  28 {
  29         return freq * util / cap;
  30 }
  31
  32 static inline unsigned long map_util_perf(unsigned long util)
  33 {
  34         return util + (util >> 2);
  35 }
  36 #endif /* CONFIG_CPU_FREQ */
  37
  38 #endif /* _LINUX_SCHED_CPUFREQ_H */