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);
21 unsigned long topology_get_cpu_scale(int cpu)
23 return per_cpu(cpu_scale, cpu);
26 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
28 DECLARE_PER_CPU(unsigned long, freq_scale);
31 unsigned long topology_get_freq_scale(int cpu)
33 return per_cpu(freq_scale, cpu);
41 cpumask_t thread_sibling;
42 cpumask_t core_sibling;
43 cpumask_t llc_sibling;
46 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
47 extern struct cpu_topology cpu_topology[NR_CPUS];
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)
54 void init_cpu_topology(void);
55 void store_cpu_topology(unsigned int cpuid);
56 const struct cpumask *cpu_coregroup_mask(int cpu);
57 void update_siblings_masks(unsigned int cpu);
58 void remove_cpu_topology(unsigned int cpuid);
59 void reset_cpu_topology(void);
62 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */