include/linux/arch_topology.h

   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 topology_set_thermal_pressure(const 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_ */