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	SCALE_FREQ_SOURCE_CPPC,
41};
42
43struct scale_freq_data {
44	enum scale_freq_source source;
45	void (*set_freq_scale)(void);
46};
47
48void topology_scale_freq_tick(void);
49void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
50void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
51
52DECLARE_PER_CPU(unsigned long, thermal_pressure);
53
54static inline unsigned long topology_get_thermal_pressure(int cpu)
55{
56	return per_cpu(thermal_pressure, cpu);
57}
58
59void topology_set_thermal_pressure(const struct cpumask *cpus,
60				   unsigned long th_pressure);
61
62struct cpu_topology {
63	int thread_id;
64	int core_id;
65	int package_id;
66	int llc_id;
67	cpumask_t thread_sibling;
68	cpumask_t core_sibling;
69	cpumask_t llc_sibling;
70};
71
72#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
73extern struct cpu_topology cpu_topology[NR_CPUS];
74
75#define topology_physical_package_id(cpu)	(cpu_topology[cpu].package_id)
76#define topology_core_id(cpu)		(cpu_topology[cpu].core_id)
77#define topology_core_cpumask(cpu)	(&cpu_topology[cpu].core_sibling)
78#define topology_sibling_cpumask(cpu)	(&cpu_topology[cpu].thread_sibling)
79#define topology_llc_cpumask(cpu)	(&cpu_topology[cpu].llc_sibling)
80void init_cpu_topology(void);
81void store_cpu_topology(unsigned int cpuid);
82const struct cpumask *cpu_coregroup_mask(int cpu);
83void update_siblings_masks(unsigned int cpu);
84void remove_cpu_topology(unsigned int cpuid);
85void reset_cpu_topology(void);
86int parse_acpi_topology(void);
87#endif
88
89#endif /* _LINUX_ARCH_TOPOLOGY_H_ */