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 struct cpu_topology { 34 int thread_id; 35 int core_id; 36 int package_id; 37 int llc_id; 38 cpumask_t thread_sibling; 39 cpumask_t core_sibling; 40 cpumask_t llc_sibling; 41 }; 42 43 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY 44 extern struct cpu_topology cpu_topology[NR_CPUS]; 45 46 #define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id) 47 #define topology_core_id(cpu) (cpu_topology[cpu].core_id) 48 #define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling) 49 #define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling) 50 #define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling) 51 void init_cpu_topology(void); 52 void store_cpu_topology(unsigned int cpuid); 53 const struct cpumask *cpu_coregroup_mask(int cpu); 54 void update_siblings_masks(unsigned int cpu); 55 void remove_cpu_topology(unsigned int cpuid); 56 void reset_cpu_topology(void); 57 int parse_acpi_topology(void); 58 #endif 59 60 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */ 61