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TOMOYO Linux Cross Reference
Linux/include/linux/arch_topology.h

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  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 

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