1 /* SPDX-License-Identifier: GPL-2.0 */
3 * include/linux/arch_topology.h - arch specific cpu topology information
5 #ifndef _LINUX_ARCH_TOPOLOGY_H_
6 #define _LINUX_ARCH_TOPOLOGY_H_
8 #include <linux/types.h>
9 #include <linux/percpu.h>
11 void topology_normalize_cpu_scale(void);
12 int topology_update_cpu_topology(void);
14 #ifdef CONFIG_ACPI_CPPC_LIB
15 void topology_init_cpu_capacity_cppc(void);
19 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
21 DECLARE_PER_CPU(unsigned long, cpu_scale);
23 static inline unsigned long topology_get_cpu_scale(int cpu)
25 return per_cpu(cpu_scale, cpu);
28 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
30 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
32 static inline unsigned long topology_get_freq_scale(int cpu)
34 return per_cpu(arch_freq_scale, cpu);
37 void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
38 unsigned long max_freq);
39 bool topology_scale_freq_invariant(void);
41 enum scale_freq_source {
42 SCALE_FREQ_SOURCE_CPUFREQ = 0,
43 SCALE_FREQ_SOURCE_ARCH,
44 SCALE_FREQ_SOURCE_CPPC,
47 struct scale_freq_data {
48 enum scale_freq_source source;
49 void (*set_freq_scale)(void);
52 void topology_scale_freq_tick(void);
53 void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
54 void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
56 DECLARE_PER_CPU(unsigned long, thermal_pressure);
58 static inline unsigned long topology_get_thermal_pressure(int cpu)
60 return per_cpu(thermal_pressure, cpu);
63 void topology_update_thermal_pressure(const struct cpumask *cpus,
64 unsigned long capped_freq);
72 cpumask_t thread_sibling;
73 cpumask_t core_sibling;
74 cpumask_t cluster_sibling;
75 cpumask_t llc_sibling;
78 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
79 extern struct cpu_topology cpu_topology[NR_CPUS];
81 #define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
82 #define topology_cluster_id(cpu) (cpu_topology[cpu].cluster_id)
83 #define topology_core_id(cpu) (cpu_topology[cpu].core_id)
84 #define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
85 #define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
86 #define topology_cluster_cpumask(cpu) (&cpu_topology[cpu].cluster_sibling)
87 #define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
88 void init_cpu_topology(void);
89 void store_cpu_topology(unsigned int cpuid);
90 const struct cpumask *cpu_coregroup_mask(int cpu);
91 const struct cpumask *cpu_clustergroup_mask(int cpu);
92 void update_siblings_masks(unsigned int cpu);
93 void remove_cpu_topology(unsigned int cpuid);
94 void reset_cpu_topology(void);
95 int parse_acpi_topology(void);
98 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */