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);
15 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
17 DECLARE_PER_CPU(unsigned long, cpu_scale);
19 static inline unsigned long topology_get_cpu_scale(int cpu)
21 return per_cpu(cpu_scale, cpu);
24 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
26 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
28 static inline unsigned long topology_get_freq_scale(int cpu)
30 return per_cpu(arch_freq_scale, cpu);
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);
37 enum scale_freq_source {
38 SCALE_FREQ_SOURCE_CPUFREQ = 0,
39 SCALE_FREQ_SOURCE_ARCH,
42 struct scale_freq_data {
43 enum scale_freq_source source;
44 void (*set_freq_scale)(void);
47 void topology_scale_freq_tick(void);
48 void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
49 void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
51 DECLARE_PER_CPU(unsigned long, thermal_pressure);
53 static inline unsigned long topology_get_thermal_pressure(int cpu)
55 return per_cpu(thermal_pressure, cpu);
58 void topology_set_thermal_pressure(const struct cpumask *cpus,
59 unsigned long th_pressure);
66 cpumask_t thread_sibling;
67 cpumask_t core_sibling;
68 cpumask_t llc_sibling;
71 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
72 extern struct cpu_topology cpu_topology[NR_CPUS];
74 #define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
75 #define topology_core_id(cpu) (cpu_topology[cpu].core_id)
76 #define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
77 #define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
78 #define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
79 void init_cpu_topology(void);
80 void store_cpu_topology(unsigned int cpuid);
81 const struct cpumask *cpu_coregroup_mask(int cpu);
82 void update_siblings_masks(unsigned int cpu);
83 void remove_cpu_topology(unsigned int cpuid);
84 void reset_cpu_topology(void);
85 int parse_acpi_topology(void);
88 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */