1 /* SPDX-License-Identifier: GPL-2.0 */
3 * include/linux/arch_topology.h - arch specific cpu topology information
5 #ifndef _LINUX_ARCH_TOPOLOGY_H_
6 #define _LINUX_ARCH_TOPOLOGY_H_
8 #include <linux/types.h>
9 #include <linux/percpu.h>
11 void topology_normalize_cpu_scale(void);
12 int topology_update_cpu_topology(void);
15 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
17 DECLARE_PER_CPU(unsigned long, cpu_scale);
19 static inline unsigned long topology_get_cpu_scale(int cpu)
21 return per_cpu(cpu_scale, cpu);
24 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
26 DECLARE_PER_CPU(unsigned long, freq_scale);
28 static inline unsigned long topology_get_freq_scale(int cpu)
30 return per_cpu(freq_scale, cpu);
33 bool arch_freq_counters_available(struct cpumask *cpus);
35 DECLARE_PER_CPU(unsigned long, thermal_pressure);
37 static inline unsigned long topology_get_thermal_pressure(int cpu)
39 return per_cpu(thermal_pressure, cpu);
42 void topology_set_thermal_pressure(const struct cpumask *cpus,
43 unsigned long th_pressure);
50 cpumask_t thread_sibling;
51 cpumask_t core_sibling;
52 cpumask_t llc_sibling;
55 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
56 extern struct cpu_topology cpu_topology[NR_CPUS];
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);
72 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */