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  * Avoid creating an extra level of balancing (SD_ALLNODES) on the largest
  23  * POWER7 boxes which have a maximum of 32 nodes.
  24  */
  25 #define SD_NODES_PER_DOMAIN 32
  26
  27 #include <asm/mmzone.h>
  28
  29 static inline int cpu_to_node(int cpu)
  30 {
  31         return numa_cpu_lookup_table[cpu];
  32 }
  33
  34 #define parent_node(node)       (node)
  35
  36 #define cpumask_of_node(node) ((node) == -1 ?                           \
  37                                cpu_all_mask :                           \
  38                                node_to_cpumask_map[node])
  39
  40 struct pci_bus;
  41 #ifdef CONFIG_PCI
  42 extern int pcibus_to_node(struct pci_bus *bus);
  43 #else
  44 static inline int pcibus_to_node(struct pci_bus *bus)
  45 {
  46         return -1;
  47 }
  48 #endif
  49
  50 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  51                                  cpu_all_mask :                         \
  52                                  cpumask_of_node(pcibus_to_node(bus)))
  53
  54 /* sched_domains SD_NODE_INIT for PPC64 machines */
  55 #define SD_NODE_INIT (struct sched_domain) {                            \
  56         .min_interval           = 8,                                    \
  57         .max_interval           = 32,                                   \
  58         .busy_factor            = 32,                                   \
  59         .imbalance_pct          = 125,                                  \
  60         .cache_nice_tries       = 1,                                    \
  61         .busy_idx               = 3,                                    \
  62         .idle_idx               = 1,                                    \
  63         .newidle_idx            = 0,                                    \
  64         .wake_idx               = 0,                                    \
  65         .forkexec_idx           = 0,                                    \
  66                                                                         \
  67         .flags                  = 1*SD_LOAD_BALANCE                     \
  68                                 | 0*SD_BALANCE_NEWIDLE                  \
  69                                 | 1*SD_BALANCE_EXEC                     \
  70                                 | 1*SD_BALANCE_FORK                     \
  71                                 | 0*SD_BALANCE_WAKE                     \
  72                                 | 1*SD_WAKE_AFFINE                      \
  73                                 | 0*SD_PREFER_LOCAL                     \
  74                                 | 0*SD_SHARE_CPUPOWER                   \
  75                                 | 0*SD_POWERSAVINGS_BALANCE             \
  76                                 | 0*SD_SHARE_PKG_RESOURCES              \
  77                                 | 1*SD_SERIALIZE                        \
  78                                 | 0*SD_PREFER_SIBLING                   \
  79                                 ,                                       \
  80         .last_balance           = jiffies,                              \
  81         .balance_interval       = 1,                                    \
  82 }
  83
  84 extern int __node_distance(int, int);
  85 #define node_distance(a, b) __node_distance(a, b)
  86
  87 extern void __init dump_numa_cpu_topology(void);
  88
  89 extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
  90 extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
  91
  92 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
  93 {
  94         numa_cpu_lookup_table[cpu] = node;
  95 }
  96
  97 #else
  98
  99 static inline void dump_numa_cpu_topology(void) {}
 100
 101 static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
 102 {
 103         return 0;
 104 }
 105
 106 static inline void sysfs_remove_device_from_node(struct sys_device *dev,
 107                                                 int nid)
 108 {
 109 }
 110 #endif /* CONFIG_NUMA */
 111
 112 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
 113 extern int start_topology_update(void);
 114 extern int stop_topology_update(void);
 115 #else
 116 static inline int start_topology_update(void)
 117 {
 118         return 0;
 119 }
 120 static inline int stop_topology_update(void)
 121 {
 122         return 0;
 123 }
 124 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
 125
 126 #include <asm-generic/topology.h>
 127
 128 #ifdef CONFIG_SMP
 129 #include <asm/cputable.h>
 130 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
 131
 132 #ifdef CONFIG_PPC64
 133 #include <asm/smp.h>
 134
 135 #define topology_thread_cpumask(cpu)    (per_cpu(cpu_sibling_map, cpu))
 136 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 137 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 138 #endif
 139 #endif
 140
 141 #endif /* __KERNEL__ */
 142 #endif  /* _ASM_POWERPC_TOPOLOGY_H */