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
11 void topology_normalize_cpu_scale(void);
12 int topology_update_cpu_topology(void);
13
14 struct device_node;
15 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
16
17 DECLARE_PER_CPU(unsigned long, cpu_scale);
18
topology_get_cpu_scale(int cpu)19 static inline unsigned long topology_get_cpu_scale(int cpu)
20 {
21 return per_cpu(cpu_scale, cpu);
22 }
23
24 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
25
26 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
27
topology_get_freq_scale(int cpu)28 static inline unsigned long topology_get_freq_scale(int cpu)
29 {
30 return per_cpu(arch_freq_scale, cpu);
31 }
32
33 void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
34 unsigned long max_freq);
35 bool topology_scale_freq_invariant(void);
36
37 enum scale_freq_source {
38 SCALE_FREQ_SOURCE_CPUFREQ = 0,
39 SCALE_FREQ_SOURCE_ARCH,
40 SCALE_FREQ_SOURCE_CPPC,
41 };
42
43 struct scale_freq_data {
44 enum scale_freq_source source;
45 void (*set_freq_scale)(void);
46 };
47
48 void topology_scale_freq_tick(void);
49 void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
50 void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
51
52 DECLARE_PER_CPU(unsigned long, thermal_pressure);
53
topology_get_thermal_pressure(int cpu)54 static inline unsigned long topology_get_thermal_pressure(int cpu)
55 {
56 return per_cpu(thermal_pressure, cpu);
57 }
58
59 void topology_set_thermal_pressure(const struct cpumask *cpus,
60 unsigned long th_pressure);
61
62 struct cpu_topology {
63 int thread_id;
64 int core_id;
65 int cluster_id;
66 int package_id;
67 int llc_id;
68 cpumask_t thread_sibling;
69 cpumask_t core_sibling;
70 cpumask_t cluster_sibling;
71 cpumask_t llc_sibling;
72 };
73
74 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
75 extern struct cpu_topology cpu_topology[NR_CPUS];
76
77 #define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
78 #define topology_cluster_id(cpu) (cpu_topology[cpu].cluster_id)
79 #define topology_core_id(cpu) (cpu_topology[cpu].core_id)
80 #define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
81 #define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
82 #define topology_cluster_cpumask(cpu) (&cpu_topology[cpu].cluster_sibling)
83 #define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
84 void init_cpu_topology(void);
85 void store_cpu_topology(unsigned int cpuid);
86 const struct cpumask *cpu_coregroup_mask(int cpu);
87 const struct cpumask *cpu_clustergroup_mask(int cpu);
88 void update_siblings_masks(unsigned int cpu);
89 void remove_cpu_topology(unsigned int cpuid);
90 void reset_cpu_topology(void);
91 int parse_acpi_topology(void);
92 #endif
93
94 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */
95