arch/powerpc/include/asm/topology.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_TOPOLOGY_H
   3 #define _ASM_POWERPC_TOPOLOGY_H
   4 #ifdef __KERNEL__
   5
   6
   7 struct device;
   8 struct device_node;
   9
  10 #ifdef CONFIG_NUMA
  11
  12 /*
  13  * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
  14  * all zones on all nodes will be eligible for zone_reclaim().
  15  */
  16 #define RECLAIM_DISTANCE 10
  17
  18 #include <asm/mmzone.h>
  19
  20 #define cpumask_of_node(node) ((node) == -1 ?                           \
  21                                cpu_all_mask :                           \
  22                                node_to_cpumask_map[node])
  23
  24 struct pci_bus;
  25 #ifdef CONFIG_PCI
  26 extern int pcibus_to_node(struct pci_bus *bus);
  27 #else
  28 static inline int pcibus_to_node(struct pci_bus *bus)
  29 {
  30         return -1;
  31 }
  32 #endif
  33
  34 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  35                                  cpu_all_mask :                         \
  36                                  cpumask_of_node(pcibus_to_node(bus)))
  37
  38 extern int __node_distance(int, int);
  39 #define node_distance(a, b) __node_distance(a, b)
  40
  41 extern void __init dump_numa_cpu_topology(void);
  42
  43 extern int sysfs_add_device_to_node(struct device *dev, int nid);
  44 extern void sysfs_remove_device_from_node(struct device *dev, int nid);
  45 extern int numa_update_cpu_topology(bool cpus_locked);
  46
  47 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
  48 {
  49         numa_cpu_lookup_table[cpu] = node;
  50 }
  51
  52 static inline int early_cpu_to_node(int cpu)
  53 {
  54         int nid;
  55
  56         nid = numa_cpu_lookup_table[cpu];
  57
  58         /*
  59          * Fall back to node 0 if nid is unset (it should be, except bugs).
  60          * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
  61          */
  62         return (nid < 0) ? 0 : nid;
  63 }
  64 #else
  65
  66 static inline int early_cpu_to_node(int cpu) { return 0; }
  67
  68 static inline void dump_numa_cpu_topology(void) {}
  69
  70 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
  71 {
  72         return 0;
  73 }
  74
  75 static inline void sysfs_remove_device_from_node(struct device *dev,
  76                                                 int nid)
  77 {
  78 }
  79
  80 static inline int numa_update_cpu_topology(bool cpus_locked)
  81 {
  82         return 0;
  83 }
  84
  85 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
  86
  87 #endif /* CONFIG_NUMA */
  88
  89 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
  90 extern int start_topology_update(void);
  91 extern int stop_topology_update(void);
  92 extern int prrn_is_enabled(void);
  93 extern int find_and_online_cpu_nid(int cpu);
  94 #else
  95 static inline int start_topology_update(void)
  96 {
  97         return 0;
  98 }
  99 static inline int stop_topology_update(void)
 100 {
 101         return 0;
 102 }
 103 static inline int prrn_is_enabled(void)
 104 {
 105         return 0;
 106 }
 107 static inline int find_and_online_cpu_nid(int cpu)
 108 {
 109         return 0;
 110 }
 111 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
 112
 113 #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_NEED_MULTIPLE_NODES)
 114 #if defined(CONFIG_PPC_SPLPAR)
 115 extern int timed_topology_update(int nsecs);
 116 #else
 117 #define timed_topology_update(nsecs)
 118 #endif /* CONFIG_PPC_SPLPAR */
 119 #endif /* CONFIG_HOTPLUG_CPU || CONFIG_NEED_MULTIPLE_NODES */
 120
 121 #include <asm-generic/topology.h>
 122
 123 #ifdef CONFIG_SMP
 124 #include <asm/cputable.h>
 125
 126 #ifdef CONFIG_PPC64
 127 #include <asm/smp.h>
 128
 129 #define topology_physical_package_id(cpu)       (cpu_to_chip_id(cpu))
 130 #define topology_sibling_cpumask(cpu)   (per_cpu(cpu_sibling_map, cpu))
 131 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 132 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 133 #endif
 134 #endif
 135
 136 #endif /* __KERNEL__ */
 137 #endif  /* _ASM_POWERPC_TOPOLOGY_H */