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
  19struct sched_domain;
  20static inline
  21unsigned long topology_get_cpu_scale(int cpu)
  22{
  23        return per_cpu(cpu_scale, cpu);
  24}
  25
  26void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
  27
  28DECLARE_PER_CPU(unsigned long, freq_scale);
  29
  30static inline
  31unsigned long topology_get_freq_scale(int cpu)
  32{
  33        return per_cpu(freq_scale, cpu);
  34}
  35
  36struct 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
  47extern 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)
  54void init_cpu_topology(void);
  55void store_cpu_topology(unsigned int cpuid);
  56const struct cpumask *cpu_coregroup_mask(int cpu);
  57void update_siblings_masks(unsigned int cpu);
  58void remove_cpu_topology(unsigned int cpuid);
  59void reset_cpu_topology(void);
  60int parse_acpi_topology(void);
  61#endif
  62
  63#endif /* _LINUX_ARCH_TOPOLOGY_H_ */
  64