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, 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(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 bool arch_freq_counters_available(const struct cpumask *cpus);
38
39 DECLARE_PER_CPU(unsigned long, thermal_pressure);
40
topology_get_thermal_pressure(int cpu)41 static inline unsigned long topology_get_thermal_pressure(int cpu)
42 {
43 return per_cpu(thermal_pressure, cpu);
44 }
45
46 void topology_set_thermal_pressure(const struct cpumask *cpus,
47 unsigned long th_pressure);
48
49 struct 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
60 extern 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)
67 void init_cpu_topology(void);
68 void store_cpu_topology(unsigned int cpuid);
69 const struct cpumask *cpu_coregroup_mask(int cpu);
70 void update_siblings_masks(unsigned int cpu);
71 void remove_cpu_topology(unsigned int cpuid);
72 void reset_cpu_topology(void);
73 int parse_acpi_topology(void);
74 #endif
75
76 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */
77
