arch/powerpc/include/asm/topology.h

   1 #ifndef _ASM_POWERPC_TOPOLOGY_H
   2 #define _ASM_POWERPC_TOPOLOGY_H
   3 #ifdef __KERNEL__
   4
   5
   6 struct sys_device;
   7 struct device_node;
   8
   9 #ifdef CONFIG_NUMA
  10
  11 /*
  12  * Before going off node we want the VM to try and reclaim from the local
  13  * node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
  14  * With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
  15  * 20, we never reclaim and go off node straight away.
  16  *
  17  * To fix this we choose a smaller value of RECLAIM_DISTANCE.
  18  */
  19 #define RECLAIM_DISTANCE 10
  20
  21 /*
  22  * Before going off node we want the VM to try and reclaim from the local
  23  * node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
  24  * With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
  25  * 20, we never reclaim and go off node straight away.
  26  *
  27  * To fix this we choose a smaller value of RECLAIM_DISTANCE.
  28  */
  29 #define RECLAIM_DISTANCE 10
  30
  31 #include <asm/mmzone.h>
  32
  33 static inline int cpu_to_node(int cpu)
  34 {
  35         return numa_cpu_lookup_table[cpu];
  36 }
  37
  38 #define parent_node(node)       (node)
  39
  40 #define cpumask_of_node(node) ((node) == -1 ?                           \
  41                                cpu_all_mask :                           \
  42                                node_to_cpumask_map[node])
  43
  44 struct pci_bus;
  45 #ifdef CONFIG_PCI
  46 extern int pcibus_to_node(struct pci_bus *bus);
  47 #else
  48 static inline int pcibus_to_node(struct pci_bus *bus)
  49 {
  50         return -1;
  51 }
  52 #endif
  53
  54 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  55                                  cpu_all_mask :                         \
  56                                  cpumask_of_node(pcibus_to_node(bus)))
  57
  58 /* sched_domains SD_NODE_INIT for PPC64 machines */
  59 #define SD_NODE_INIT (struct sched_domain) {                            \
  60         .min_interval           = 8,                                    \
  61         .max_interval           = 32,                                   \
  62         .busy_factor            = 32,                                   \
  63         .imbalance_pct          = 125,                                  \
  64         .cache_nice_tries       = 1,                                    \
  65         .busy_idx               = 3,                                    \
  66         .idle_idx               = 1,                                    \
  67         .newidle_idx            = 0,                                    \
  68         .wake_idx               = 0,                                    \
  69         .forkexec_idx           = 0,                                    \
  70                                                                         \
  71         .flags                  = 1*SD_LOAD_BALANCE                     \
  72                                 | 1*SD_BALANCE_NEWIDLE                  \
  73                                 | 1*SD_BALANCE_EXEC                     \
  74                                 | 1*SD_BALANCE_FORK                     \
  75                                 | 0*SD_BALANCE_WAKE                     \
  76                                 | 0*SD_WAKE_AFFINE                      \
  77                                 | 0*SD_PREFER_LOCAL                     \
  78                                 | 0*SD_SHARE_CPUPOWER                   \
  79                                 | 0*SD_POWERSAVINGS_BALANCE             \
  80                                 | 0*SD_SHARE_PKG_RESOURCES              \
  81                                 | 1*SD_SERIALIZE                        \
  82                                 | 0*SD_PREFER_SIBLING                   \
  83                                 ,                                       \
  84         .last_balance           = jiffies,                              \
  85         .balance_interval       = 1,                                    \
  86 }
  87
  88 extern int __node_distance(int, int);
  89 #define node_distance(a, b) __node_distance(a, b)
  90
  91 extern void __init dump_numa_cpu_topology(void);
  92
  93 extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
  94 extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
  95
  96 #else
  97
  98 static inline void dump_numa_cpu_topology(void) {}
  99
 100 static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
 101 {
 102         return 0;
 103 }
 104
 105 static inline void sysfs_remove_device_from_node(struct sys_device *dev,
 106                                                 int nid)
 107 {
 108 }
 109 #endif /* CONFIG_NUMA */
 110
 111 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
 112 extern int start_topology_update(void);
 113 extern int stop_topology_update(void);
 114 #else
 115 static inline int start_topology_update(void)
 116 {
 117         return 0;
 118 }
 119 static inline int stop_topology_update(void)
 120 {
 121         return 0;
 122 }
 123 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
 124
 125 #include <asm-generic/topology.h>
 126
 127 #ifdef CONFIG_SMP
 128 #include <asm/cputable.h>
 129 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
 130
 131 #ifdef CONFIG_PPC64
 132 #include <asm/smp.h>
 133
 134 #define topology_thread_cpumask(cpu)    (per_cpu(cpu_sibling_map, cpu))
 135 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 136 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 137 #endif
 138 #endif
 139
 140 #endif /* __KERNEL__ */
 141 #endif  /* _ASM_POWERPC_TOPOLOGY_H */