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 14#ifdef CONFIG_ACPI_CPPC_LIB 15void topology_init_cpu_capacity_cppc(void); 16#endif 17 18struct device_node; 19bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu); 20 21DECLARE_PER_CPU(unsigned long, cpu_scale); 22 23static inline unsigned long topology_get_cpu_scale(int cpu) 24{ 25 return per_cpu(cpu_scale, cpu); 26} 27 28void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity); 29 30DECLARE_PER_CPU(unsigned long, capacity_freq_ref); 31 32static inline unsigned long topology_get_freq_ref(int cpu) 33{ 34 return per_cpu(capacity_freq_ref, cpu); 35} 36 37DECLARE_PER_CPU(unsigned long, arch_freq_scale); 38 39static inline unsigned long topology_get_freq_scale(int cpu) 40{ 41 return per_cpu(arch_freq_scale, cpu); 42} 43 44void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq, 45 unsigned long max_freq); 46bool topology_scale_freq_invariant(void); 47 48enum scale_freq_source { 49 SCALE_FREQ_SOURCE_CPUFREQ = 0, 50 SCALE_FREQ_SOURCE_ARCH, 51 SCALE_FREQ_SOURCE_CPPC, 52}; 53 54struct scale_freq_data { 55 enum scale_freq_source source; 56 void (*set_freq_scale)(void); 57}; 58 59void topology_scale_freq_tick(void); 60void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus); 61void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus); 62 63DECLARE_PER_CPU(unsigned long, thermal_pressure); 64 65static inline unsigned long topology_get_thermal_pressure(int cpu) 66{ 67 return per_cpu(thermal_pressure, cpu); 68} 69 70void topology_update_thermal_pressure(const struct cpumask *cpus, 71 unsigned long capped_freq); 72 73struct cpu_topology { 74 int thread_id; 75 int core_id; 76 int cluster_id; 77 int package_id; 78 cpumask_t thread_sibling; 79 cpumask_t core_sibling; 80 cpumask_t cluster_sibling; 81 cpumask_t llc_sibling; 82}; 83 84#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY 85extern struct cpu_topology cpu_topology[NR_CPUS]; 86 87#define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id) 88#define topology_cluster_id(cpu) (cpu_topology[cpu].cluster_id) 89#define topology_core_id(cpu) (cpu_topology[cpu].core_id) 90#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling) 91#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling) 92#define topology_cluster_cpumask(cpu) (&cpu_topology[cpu].cluster_sibling) 93#define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling) 94void init_cpu_topology(void); 95void store_cpu_topology(unsigned int cpuid); 96const struct cpumask *cpu_coregroup_mask(int cpu); 97const struct cpumask *cpu_clustergroup_mask(int cpu); 98void update_siblings_masks(unsigned int cpu); 99void remove_cpu_topology(unsigned int cpuid); 100void reset_cpu_topology(void); 101int parse_acpi_topology(void); 102void freq_inv_set_max_ratio(int cpu, u64 max_rate); 103#endif 104 105#endif /* _LINUX_ARCH_TOPOLOGY_H_ */ 106