tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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, freq_scale);
27
28static inline unsigned long topology_get_freq_scale(int cpu)
29{
30 return per_cpu(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
37bool arch_freq_counters_available(const struct cpumask *cpus);
38
39DECLARE_PER_CPU(unsigned long, thermal_pressure);
40
41static inline unsigned long topology_get_thermal_pressure(int cpu)
42{
43 return per_cpu(thermal_pressure, cpu);
44}
45
46void topology_set_thermal_pressure(const struct cpumask *cpus,
47 unsigned long th_pressure);
48
49struct cpu_topology {
50 int thread_id;
51 int core_id;
52 int package_id;
53 int llc_id;
54 cpumask_t thread_sibling;
55 cpumask_t core_sibling;
56 cpumask_t llc_sibling;
57};
58
59#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
60extern struct cpu_topology cpu_topology[NR_CPUS];
61
62#define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
63#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
64#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
65#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
66#define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
67void init_cpu_topology(void);
68void store_cpu_topology(unsigned int cpuid);
69const struct cpumask *cpu_coregroup_mask(int cpu);
70void update_siblings_masks(unsigned int cpu);
71void remove_cpu_topology(unsigned int cpuid);
72void reset_cpu_topology(void);
73int parse_acpi_topology(void);
74#endif
75
76#endif /* _LINUX_ARCH_TOPOLOGY_H_ */