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, arch_freq_scale); 27 28 static inline unsigned long topology_get_freq_scale(int cpu) 29 { 30 return per_cpu(arch_freq_scale, cpu); 31 } 32 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); 36 37 enum scale_freq_source { 38 SCALE_FREQ_SOURCE_CPUFREQ = 0, 39 SCALE_FREQ_SOURCE_ARCH, 40 }; 41 42 struct scale_freq_data { 43 enum scale_freq_source source; 44 void (*set_freq_scale)(void); 45 }; 46 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); 50 51 DECLARE_PER_CPU(unsigned long, thermal_pressure); 52 53 static inline unsigned long topology_get_thermal_pressure(int cpu) 54 { 55 return per_cpu(thermal_pressure, cpu); 56 } 57 58 void topology_set_thermal_pressure(const struct cpumask *cpus, 59 unsigned long th_pressure); 60 61 struct cpu_topology { 62 int thread_id; 63 int core_id; 64 int package_id; 65 int llc_id; 66 cpumask_t thread_sibling; 67 cpumask_t core_sibling; 68 cpumask_t llc_sibling; 69 }; 70 71 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY 72 extern struct cpu_topology cpu_topology[NR_CPUS]; 73 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); 86 #endif 87 88 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */ 89