Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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, capacity_freq_ref);
27
28static inline unsigned long topology_get_freq_ref(int cpu)
29{
30 return per_cpu(capacity_freq_ref, cpu);
31}
32
33DECLARE_PER_CPU(unsigned long, arch_freq_scale);
34
35static inline unsigned long topology_get_freq_scale(int cpu)
36{
37 return per_cpu(arch_freq_scale, cpu);
38}
39
40void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
41 unsigned long max_freq);
42bool topology_scale_freq_invariant(void);
43
44enum scale_freq_source {
45 SCALE_FREQ_SOURCE_CPUFREQ = 0,
46 SCALE_FREQ_SOURCE_ARCH,
47 SCALE_FREQ_SOURCE_CPPC,
48 SCALE_FREQ_SOURCE_VIRT,
49};
50
51struct scale_freq_data {
52 enum scale_freq_source source;
53 void (*set_freq_scale)(void);
54};
55
56void topology_scale_freq_tick(void);
57void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
58void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
59
60DECLARE_PER_CPU(unsigned long, hw_pressure);
61
62static inline unsigned long topology_get_hw_pressure(int cpu)
63{
64 return per_cpu(hw_pressure, cpu);
65}
66
67void topology_update_hw_pressure(const struct cpumask *cpus,
68 unsigned long capped_freq);
69
70struct cpu_topology {
71 int thread_id;
72 int core_id;
73 int cluster_id;
74 int package_id;
75 cpumask_t thread_sibling;
76 cpumask_t core_sibling;
77 cpumask_t cluster_sibling;
78 cpumask_t llc_sibling;
79};
80
81#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
82extern struct cpu_topology cpu_topology[NR_CPUS];
83
84#define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
85#define topology_cluster_id(cpu) (cpu_topology[cpu].cluster_id)
86#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
87#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
88#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
89#define topology_cluster_cpumask(cpu) (&cpu_topology[cpu].cluster_sibling)
90#define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
91void init_cpu_topology(void);
92void store_cpu_topology(unsigned int cpuid);
93const struct cpumask *cpu_coregroup_mask(int cpu);
94const struct cpumask *cpu_clustergroup_mask(int cpu);
95void update_siblings_masks(unsigned int cpu);
96void remove_cpu_topology(unsigned int cpuid);
97void reset_cpu_topology(void);
98int parse_acpi_topology(void);
99void freq_inv_set_max_ratio(int cpu, u64 max_rate);
100#endif
101
102#endif /* _LINUX_ARCH_TOPOLOGY_H_ */