LXR linux/arch/s390/include/asm/topology.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_S390_TOPOLOGY_H
   3#define _ASM_S390_TOPOLOGY_H
   4
   5#include <linux/cpumask.h>
   6#include <asm/numa.h>
   7
   8struct sysinfo_15_1_x;
   9struct cpu;
  10
  11#ifdef CONFIG_SCHED_TOPOLOGY
  12
  13struct cpu_topology_s390 {
  14        unsigned short thread_id;
  15        unsigned short core_id;
  16        unsigned short socket_id;
  17        unsigned short book_id;
  18        unsigned short drawer_id;
  19        unsigned short node_id;
  20        unsigned short dedicated : 1;
  21        cpumask_t thread_mask;
  22        cpumask_t core_mask;
  23        cpumask_t book_mask;
  24        cpumask_t drawer_mask;
  25};
  26
  27extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
  28extern cpumask_t cpus_with_topology;
  29
  30#define topology_physical_package_id(cpu) (cpu_topology[cpu].socket_id)
  31#define topology_thread_id(cpu)           (cpu_topology[cpu].thread_id)
  32#define topology_sibling_cpumask(cpu)     (&cpu_topology[cpu].thread_mask)
  33#define topology_core_id(cpu)             (cpu_topology[cpu].core_id)
  34#define topology_core_cpumask(cpu)        (&cpu_topology[cpu].core_mask)
  35#define topology_book_id(cpu)             (cpu_topology[cpu].book_id)
  36#define topology_book_cpumask(cpu)        (&cpu_topology[cpu].book_mask)
  37#define topology_drawer_id(cpu)           (cpu_topology[cpu].drawer_id)
  38#define topology_drawer_cpumask(cpu)      (&cpu_topology[cpu].drawer_mask)
  39#define topology_cpu_dedicated(cpu)       (cpu_topology[cpu].dedicated)
  40
  41#define mc_capable() 1
  42
  43void topology_init_early(void);
  44int topology_cpu_init(struct cpu *);
  45int topology_set_cpu_management(int fc);
  46void topology_schedule_update(void);
  47void store_topology(struct sysinfo_15_1_x *info);
  48void update_cpu_masks(void);
  49void topology_expect_change(void);
  50const struct cpumask *cpu_coregroup_mask(int cpu);
  51
  52#else /* CONFIG_SCHED_TOPOLOGY */
  53
  54static inline void topology_init_early(void) { }
  55static inline void topology_schedule_update(void) { }
  56static inline int topology_cpu_init(struct cpu *cpu) { return 0; }
  57static inline int topology_cpu_dedicated(int cpu_nr) { return 0; }
  58static inline void update_cpu_masks(void) { }
  59static inline void topology_expect_change(void) { }
  60
  61#endif /* CONFIG_SCHED_TOPOLOGY */
  62
  63#define POLARIZATION_UNKNOWN    (-1)
  64#define POLARIZATION_HRZ        (0)
  65#define POLARIZATION_VL         (1)
  66#define POLARIZATION_VM         (2)
  67#define POLARIZATION_VH         (3)
  68
  69#define SD_BOOK_INIT    SD_CPU_INIT
  70
  71#ifdef CONFIG_NUMA
  72
  73#define cpu_to_node cpu_to_node
  74static inline int cpu_to_node(int cpu)
  75{
  76        return cpu_topology[cpu].node_id;
  77}
  78
  79/* Returns a pointer to the cpumask of CPUs on node 'node'. */
  80#define cpumask_of_node cpumask_of_node
  81static inline const struct cpumask *cpumask_of_node(int node)
  82{
  83        return &node_to_cpumask_map[node];
  84}
  85
  86#define pcibus_to_node(bus) __pcibus_to_node(bus)
  87
  88#define node_distance(a, b) __node_distance(a, b)
  89
  90#else /* !CONFIG_NUMA */
  91
  92#define numa_node_id numa_node_id
  93static inline int numa_node_id(void)
  94{
  95        return 0;
  96}
  97
  98#endif /* CONFIG_NUMA */
  99
 100#include <asm-generic/topology.h>
 101
 102#endif /* _ASM_S390_TOPOLOGY_H */
 103