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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, freq_scale);
27
28static inline unsigned long topology_get_freq_scale(int cpu)
29{
30 return per_cpu(freq_scale, cpu);
31}
32
33bool arch_freq_counters_available(struct cpumask *cpus);
34
35DECLARE_PER_CPU(unsigned long, thermal_pressure);
36
37static inline unsigned long topology_get_thermal_pressure(int cpu)
38{
39 return per_cpu(thermal_pressure, cpu);
40}
41
42void arch_set_thermal_pressure(struct cpumask *cpus,
43 unsigned long th_pressure);
44
45struct cpu_topology {
46 int thread_id;
47 int core_id;
48 int package_id;
49 int llc_id;
50 cpumask_t thread_sibling;
51 cpumask_t core_sibling;
52 cpumask_t llc_sibling;
53};
54
55#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
56extern struct cpu_topology cpu_topology[NR_CPUS];
57
58#define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
59#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
60#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
61#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
62#define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
63void init_cpu_topology(void);
64void store_cpu_topology(unsigned int cpuid);
65const struct cpumask *cpu_coregroup_mask(int cpu);
66void update_siblings_masks(unsigned int cpu);
67void remove_cpu_topology(unsigned int cpuid);
68void reset_cpu_topology(void);
69int parse_acpi_topology(void);
70#endif
71
72#endif /* _LINUX_ARCH_TOPOLOGY_H_ */