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_detect_flags(void);
13 int topology_smt_flags(void);
14 int topology_core_flags(void);
15 int topology_cpu_flags(void);
16 int topology_update_cpu_topology(void);
17
18 struct device_node;
19 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
20
21 DECLARE_PER_CPU(unsigned long, cpu_scale);
22
23 struct sched_domain;
24 static inline
topology_get_cpu_scale(struct sched_domain * sd,int cpu)25 unsigned long topology_get_cpu_scale(struct sched_domain *sd, int cpu)
26 {
27 return per_cpu(cpu_scale, cpu);
28 }
29
30 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
31
32 DECLARE_PER_CPU(unsigned long, freq_scale);
33
34 static inline
topology_get_freq_scale(struct sched_domain * sd,int cpu)35 unsigned long topology_get_freq_scale(struct sched_domain *sd, int cpu)
36 {
37 return per_cpu(freq_scale, cpu);
38 }
39
40 DECLARE_PER_CPU(unsigned long, max_freq_scale);
41
42 static inline
topology_get_max_freq_scale(struct sched_domain * sd,int cpu)43 unsigned long topology_get_max_freq_scale(struct sched_domain *sd, int cpu)
44 {
45 return per_cpu(max_freq_scale, cpu);
46 }
47
48 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */
49