LXR linux/include/linux/arch

   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
  11void topology_normalize_cpu_scale(void);
  12int topology_update_cpu_topology(void);
  13
  14struct device_node;
  15bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
  16
  17DECLARE_PER_CPU(unsigned long, cpu_scale);
  18
  19static inline unsigned long topology_get_cpu_scale(int cpu)
  20{
  21        return per_cpu(cpu_scale, cpu);
  22}
  23
  24void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
  25
  26DECLARE_PER_CPU(unsigned long, freq_scale);
  27
  28static inline unsigned long topology_get_freq_scale(int cpu)
  29{
  30        return per_cpu(freq_scale, cpu);
  31}
  32
  33bool arch_freq_counters_available(struct cpumask *cpus);
  34
  35DECLARE_PER_CPU(unsigned long, thermal_pressure);
  36
  37static inline unsigned long topology_get_thermal_pressure(int cpu)
  38{
  39        return per_cpu(thermal_pressure, cpu);
  40}
  41
  42void arch_set_thermal_pressure(struct cpumask *cpus,
  43                               unsigned long th_pressure);
  44
  45struct 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
  56extern 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)
  63void init_cpu_topology(void);
  64void store_cpu_topology(unsigned int cpuid);
  65const struct cpumask *cpu_coregroup_mask(int cpu);
  66void update_siblings_masks(unsigned int cpu);
  67void remove_cpu_topology(unsigned int cpuid);
  68void reset_cpu_topology(void);
  69int parse_acpi_topology(void);
  70#endif
  71
  72#endif /* _LINUX_ARCH_TOPOLOGY_H_ */
  73