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, arch_freq_scale);
  27
  28static inline unsigned long topology_get_freq_scale(int cpu)
  29{
  30        return per_cpu(arch_freq_scale, cpu);
  31}
  32
  33void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
  34                             unsigned long max_freq);
  35bool topology_scale_freq_invariant(void);
  36
  37enum scale_freq_source {
  38        SCALE_FREQ_SOURCE_CPUFREQ = 0,
  39        SCALE_FREQ_SOURCE_ARCH,
  40        SCALE_FREQ_SOURCE_CPPC,
  41};
  42
  43struct scale_freq_data {
  44        enum scale_freq_source source;
  45        void (*set_freq_scale)(void);
  46};
  47
  48void topology_scale_freq_tick(void);
  49void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
  50void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
  51
  52DECLARE_PER_CPU(unsigned long, thermal_pressure);
  53
  54static inline unsigned long topology_get_thermal_pressure(int cpu)
  55{
  56        return per_cpu(thermal_pressure, cpu);
  57}
  58
  59void topology_set_thermal_pressure(const struct cpumask *cpus,
  60                                   unsigned long th_pressure);
  61
  62struct cpu_topology {
  63        int thread_id;
  64        int core_id;
  65        int package_id;
  66        int llc_id;
  67        cpumask_t thread_sibling;
  68        cpumask_t core_sibling;
  69        cpumask_t llc_sibling;
  70};
  71
  72#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
  73extern struct cpu_topology cpu_topology[NR_CPUS];
  74
  75#define topology_physical_package_id(cpu)       (cpu_topology[cpu].package_id)
  76#define topology_core_id(cpu)           (cpu_topology[cpu].core_id)
  77#define topology_core_cpumask(cpu)      (&cpu_topology[cpu].core_sibling)
  78#define topology_sibling_cpumask(cpu)   (&cpu_topology[cpu].thread_sibling)
  79#define topology_llc_cpumask(cpu)       (&cpu_topology[cpu].llc_sibling)
  80void init_cpu_topology(void);
  81void store_cpu_topology(unsigned int cpuid);
  82const struct cpumask *cpu_coregroup_mask(int cpu);
  83void update_siblings_masks(unsigned int cpu);
  84void remove_cpu_topology(unsigned int cpuid);
  85void reset_cpu_topology(void);
  86int parse_acpi_topology(void);
  87#endif
  88
  89#endif /* _LINUX_ARCH_TOPOLOGY_H_ */
  90