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, freq_scale); 27 28 static inline unsigned long topology_get_freq_scale(int cpu) 29 { 30 return per_cpu(freq_scale, cpu); 31 } 32 33 bool arch_freq_counters_available(struct cpumask *cpus); 34 35 DECLARE_PER_CPU(unsigned long, thermal_pressure); 36 37 static inline unsigned long topology_get_thermal_pressure(int cpu) 38 { 39 return per_cpu(thermal_pressure, cpu); 40 } 41 42 void arch_set_thermal_pressure(struct cpumask *cpus, 43 unsigned long th_pressure); 44 45 struct cpu_topology { 46 int thread_id; 47 int core_id; 48 int package_id; 49 int llc_id; 50 cpumask_t thread_sibling; 51 cpumask_t core_sibling; 52 cpumask_t llc_sibling; 53 }; 54 55 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY 56 extern struct cpu_topology cpu_topology[NR_CPUS]; 57 58 #define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id) 59 #define topology_core_id(cpu) (cpu_topology[cpu].core_id) 60 #define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling) 61 #define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling) 62 #define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling) 63 void init_cpu_topology(void); 64 void store_cpu_topology(unsigned int cpuid); 65 const struct cpumask *cpu_coregroup_mask(int cpu); 66 void update_siblings_masks(unsigned int cpu); 67 void remove_cpu_topology(unsigned int cpuid); 68 void reset_cpu_topology(void); 69 int parse_acpi_topology(void); 70 #endif 71 72 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */ 73