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