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kernel/linux-rt-4.4.41/arch/arm64/include/asm/topology.h 726 Bytes
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  #ifndef __ASM_TOPOLOGY_H
  #define __ASM_TOPOLOGY_H
  
  #include <linux/cpumask.h>
  
  struct cpu_topology {
  	int thread_id;
  	int core_id;
  	int cluster_id;
  	cpumask_t thread_sibling;
  	cpumask_t core_sibling;
  };
  
  extern struct cpu_topology cpu_topology[NR_CPUS];
  
  #define topology_physical_package_id(cpu)	(cpu_topology[cpu].cluster_id)
  #define topology_core_id(cpu)		(cpu_topology[cpu].core_id)
  #define topology_core_cpumask(cpu)	(&cpu_topology[cpu].core_sibling)
  #define topology_sibling_cpumask(cpu)	(&cpu_topology[cpu].thread_sibling)
  
  void init_cpu_topology(void);
  void store_cpu_topology(unsigned int cpuid);
  const struct cpumask *cpu_coregroup_mask(int cpu);
  
  #include <asm-generic/topology.h>
  
  #endif /* _ASM_ARM_TOPOLOGY_H */