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, capacity_freq_ref); 31 32 static inline unsigned long topology_get_freq_ref(int cpu) 33 { 34 return per_cpu(capacity_freq_ref, cpu); 35 } 36 37 DECLARE_PER_CPU(unsigned long, arch_freq_scale); 38 39 static inline unsigned long topology_get_freq_scale(int cpu) 40 { 41 return per_cpu(arch_freq_scale, cpu); 42 } 43 44 void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq, 45 unsigned long max_freq); 46 bool topology_scale_freq_invariant(void); 47 48 enum scale_freq_source { 49 SCALE_FREQ_SOURCE_CPUFREQ = 0, 50 SCALE_FREQ_SOURCE_ARCH, 51 SCALE_FREQ_SOURCE_CPPC, 52 }; 53 54 struct scale_freq_data { 55 enum scale_freq_source source; 56 void (*set_freq_scale)(void); 57 }; 58 59 void topology_scale_freq_tick(void); 60 void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus); 61 void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus); 62 63 DECLARE_PER_CPU(unsigned long, hw_pressure); 64 65 static inline unsigned long topology_get_hw_pressure(int cpu) 66 { 67 return per_cpu(hw_pressure, cpu); 68 } 69 70 void topology_update_hw_pressure(const struct cpumask *cpus, 71 unsigned long capped_freq); 72 73 struct 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 85 extern 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) 94 void init_cpu_topology(void); 95 void store_cpu_topology(unsigned int cpuid); 96 const struct cpumask *cpu_coregroup_mask(int cpu); 97 const struct cpumask *cpu_clustergroup_mask(int cpu); 98 void update_siblings_masks(unsigned int cpu); 99 void remove_cpu_topology(unsigned int cpuid); 100 void reset_cpu_topology(void); 101 int parse_acpi_topology(void); 102 void freq_inv_set_max_ratio(int cpu, u64 max_rate); 103 #endif 104 105 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */ 106