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 struct sched_domain; 20 static inline 21 unsigned long topology_get_cpu_scale(int cpu) 22 { 23 return per_cpu(cpu_scale, cpu); 24 } 25 26 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity); 27 28 DECLARE_PER_CPU(unsigned long, freq_scale); 29 30 static inline 31 unsigned long topology_get_freq_scale(int cpu) 32 { 33 return per_cpu(freq_scale, cpu); 34 } 35 36 struct cpu_topology { 37 int thread_id; 38 int core_id; 39 int package_id; 40 int llc_id; 41 cpumask_t thread_sibling; 42 cpumask_t core_sibling; 43 cpumask_t llc_sibling; 44 }; 45 46 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY 47 extern struct cpu_topology cpu_topology[NR_CPUS]; 48 49 #define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id) 50 #define topology_core_id(cpu) (cpu_topology[cpu].core_id) 51 #define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling) 52 #define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling) 53 #define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling) 54 void init_cpu_topology(void); 55 void store_cpu_topology(unsigned int cpuid); 56 const struct cpumask *cpu_coregroup_mask(int cpu); 57 void update_siblings_masks(unsigned int cpu); 58 void remove_cpu_topology(unsigned int cpuid); 59 void reset_cpu_topology(void); 60 int parse_acpi_topology(void); 61 #endif 62 63 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */ 64