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 int topology_update_cpu_topology(void);
  13
  14 struct device_node;
  15 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
  16
  17 DECLARE_PER_CPU(unsigned long, cpu_scale);
  18
  19 struct sched_domain;
  20 static inline
  21 unsigned long topology_get_cpu_scale(int cpu)
  22 {
  23         return per_cpu(cpu_scale, cpu);
  24 }
  25
  26 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
  27
  28 DECLARE_PER_CPU(unsigned long, freq_scale);
  29
  30 static inline
  31 unsigned long topology_get_freq_scale(int cpu)
  32 {
  33         return per_cpu(freq_scale, cpu);
  34 }
  35
  36 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */