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
11void topology_normalize_cpu_scale(void);
12int topology_update_cpu_topology(void);
13
14#ifdef CONFIG_ACPI_CPPC_LIB
15void topology_init_cpu_capacity_cppc(void);
16#endif
17
18struct device_node;
19bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
20
21DECLARE_PER_CPU(unsigned long, cpu_scale);
22
23static inline unsigned long topology_get_cpu_scale(int cpu)
24{
25 return per_cpu(cpu_scale, cpu);
26}
27
28void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
29
30DECLARE_PER_CPU(unsigned long, arch_freq_scale);
31
32static inline unsigned long topology_get_freq_scale(int cpu)
33{
34 return per_cpu(arch_freq_scale, cpu);
35}
36
37void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
38 unsigned long max_freq);
39bool topology_scale_freq_invariant(void);
40
41enum scale_freq_source {
42 SCALE_FREQ_SOURCE_CPUFREQ = 0,
43 SCALE_FREQ_SOURCE_ARCH,
44 SCALE_FREQ_SOURCE_CPPC,
45};
46
47struct scale_freq_data {
48 enum scale_freq_source source;
49 void (*set_freq_scale)(void);
50};
51
52void topology_scale_freq_tick(void);
53void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
54void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
55
56DECLARE_PER_CPU(unsigned long, thermal_pressure);
57
58static inline unsigned long topology_get_thermal_pressure(int cpu)
59{
60 return per_cpu(thermal_pressure, cpu);
61}
62
63void topology_update_thermal_pressure(const struct cpumask *cpus,
64 unsigned long capped_freq);
65
66struct cpu_topology {
67 int thread_id;
68 int core_id;
69 int cluster_id;
70 int package_id;
71 cpumask_t thread_sibling;
72 cpumask_t core_sibling;
73 cpumask_t cluster_sibling;
74 cpumask_t llc_sibling;
75};
76
77#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
78extern struct cpu_topology cpu_topology[NR_CPUS];
79
80#define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
81#define topology_cluster_id(cpu) (cpu_topology[cpu].cluster_id)
82#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
83#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
84#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
85#define topology_cluster_cpumask(cpu) (&cpu_topology[cpu].cluster_sibling)
86#define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
87void init_cpu_topology(void);
88void store_cpu_topology(unsigned int cpuid);
89const struct cpumask *cpu_coregroup_mask(int cpu);
90const struct cpumask *cpu_clustergroup_mask(int cpu);
91void update_siblings_masks(unsigned int cpu);
92void remove_cpu_topology(unsigned int cpuid);
93void reset_cpu_topology(void);
94int parse_acpi_topology(void);
95#endif
96
97#endif /* _LINUX_ARCH_TOPOLOGY_H_ */
98

source code of linux/include/linux/arch_topology.h