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