include/linux/arch_topology.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * include/linux/arch_topology.h - arch specific cpu topology information
   4  */
   5 #ifndef _LINUX_ARCH_TOPOLOGY_H_
   6 #define _LINUX_ARCH_TOPOLOGY_H_
   7
   8 #include <linux/types.h>
   9 #include <linux/percpu.h>
  10
  11 void topology_normalize_cpu_scale(void);
  12
  13 struct device_node;
  14 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
  15
  16 DECLARE_PER_CPU(unsigned long, cpu_scale);
  17
  18 struct sched_domain;
  19 static inline
  20 unsigned long topology_get_cpu_scale(struct sched_domain *sd, int cpu)
  21 {
  22         return per_cpu(cpu_scale, cpu);
  23 }
  24
  25 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
  26
  27 DECLARE_PER_CPU(unsigned long, freq_scale);
  28
  29 static inline
  30 unsigned long topology_get_freq_scale(int cpu)
  31 {
  32         return per_cpu(freq_scale, cpu);
  33 }
  34
  35 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */