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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 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 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 bool arch_freq_counters_available(const struct cpumask *cpus);
 38 
 39 DECLARE_PER_CPU(unsigned long, thermal_pressure);
 40 
 41 static inline unsigned long topology_get_thermal_pressure(int cpu)
 42 {
 43         return per_cpu(thermal_pressure, cpu);
 44 }
 45 
 46 void topology_set_thermal_pressure(const struct cpumask *cpus,
 47                                    unsigned long th_pressure);
 48 
 49 struct cpu_topology {
 50         int thread_id;
 51         int core_id;
 52         int package_id;
 53         int llc_id;
 54         cpumask_t thread_sibling;
 55         cpumask_t core_sibling;
 56         cpumask_t llc_sibling;
 57 };
 58 
 59 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
 60 extern struct cpu_topology cpu_topology[NR_CPUS];
 61 
 62 #define topology_physical_package_id(cpu)       (cpu_topology[cpu].package_id)
 63 #define topology_core_id(cpu)           (cpu_topology[cpu].core_id)
 64 #define topology_core_cpumask(cpu)      (&cpu_topology[cpu].core_sibling)
 65 #define topology_sibling_cpumask(cpu)   (&cpu_topology[cpu].thread_sibling)
 66 #define topology_llc_cpumask(cpu)       (&cpu_topology[cpu].llc_sibling)
 67 void init_cpu_topology(void);
 68 void store_cpu_topology(unsigned int cpuid);
 69 const struct cpumask *cpu_coregroup_mask(int cpu);
 70 void update_siblings_masks(unsigned int cpu);
 71 void remove_cpu_topology(unsigned int cpuid);
 72 void reset_cpu_topology(void);
 73 int parse_acpi_topology(void);
 74 #endif
 75 
 76 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */
 77 

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