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