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 /*
  32  * Avoid creating an extra level of balancing (SD_ALLNODES) on the largest
  33  * POWER7 boxes which have a maximum of 32 nodes.
  34  */
  35 #define SD_NODES_PER_DOMAIN 32
  36
  37 #include <asm/mmzone.h>
  38
  39 static inline int cpu_to_node(int cpu)
  40 {
  41         return numa_cpu_lookup_table[cpu];
  42 }
  43
  44 #define parent_node(node)       (node)
  45
  46 #define cpumask_of_node(node) ((node) == -1 ?                           \
  47                                cpu_all_mask :                           \
  48                                node_to_cpumask_map[node])
  49
  50 struct pci_bus;
  51 #ifdef CONFIG_PCI
  52 extern int pcibus_to_node(struct pci_bus *bus);
  53 #else
  54 static inline int pcibus_to_node(struct pci_bus *bus)
  55 {
  56         return -1;
  57 }
  58 #endif
  59
  60 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  61                                  cpu_all_mask :                         \
  62                                  cpumask_of_node(pcibus_to_node(bus)))
  63
  64 /* sched_domains SD_NODE_INIT for PPC64 machines */
  65 #define SD_NODE_INIT (struct sched_domain) {                            \
  66         .min_interval           = 8,                                    \
  67         .max_interval           = 32,                                   \
  68         .busy_factor            = 32,                                   \
  69         .imbalance_pct          = 125,                                  \
  70         .cache_nice_tries       = 1,                                    \
  71         .busy_idx               = 3,                                    \
  72         .idle_idx               = 1,                                    \
  73         .newidle_idx            = 0,                                    \
  74         .wake_idx               = 0,                                    \
  75         .forkexec_idx           = 0,                                    \
  76                                                                         \
  77         .flags                  = 1*SD_LOAD_BALANCE                     \
  78                                 | 1*SD_BALANCE_NEWIDLE                  \
  79                                 | 1*SD_BALANCE_EXEC                     \
  80                                 | 1*SD_BALANCE_FORK                     \
  81                                 | 0*SD_BALANCE_WAKE                     \
  82                                 | 1*SD_WAKE_AFFINE                      \
  83                                 | 0*SD_PREFER_LOCAL                     \
  84                                 | 0*SD_SHARE_CPUPOWER                   \
  85                                 | 0*SD_POWERSAVINGS_BALANCE             \
  86                                 | 0*SD_SHARE_PKG_RESOURCES              \
  87                                 | 1*SD_SERIALIZE                        \
  88                                 | 0*SD_PREFER_SIBLING                   \
  89                                 ,                                       \
  90         .last_balance           = jiffies,                              \
  91         .balance_interval       = 1,                                    \
  92 }
  93
  94 extern int __node_distance(int, int);
  95 #define node_distance(a, b) __node_distance(a, b)
  96
  97 extern void __init dump_numa_cpu_topology(void);
  98
  99 extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
 100 extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
 101
 102 #else
 103
 104 static inline void dump_numa_cpu_topology(void) {}
 105
 106 static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
 107 {
 108         return 0;
 109 }
 110
 111 static inline void sysfs_remove_device_from_node(struct sys_device *dev,
 112                                                 int nid)
 113 {
 114 }
 115 #endif /* CONFIG_NUMA */
 116
 117 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
 118 extern int start_topology_update(void);
 119 extern int stop_topology_update(void);
 120 #else
 121 static inline int start_topology_update(void)
 122 {
 123         return 0;
 124 }
 125 static inline int stop_topology_update(void)
 126 {
 127         return 0;
 128 }
 129 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
 130
 131 #include <asm-generic/topology.h>
 132
 133 #ifdef CONFIG_SMP
 134 #include <asm/cputable.h>
 135 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
 136
 137 #ifdef CONFIG_PPC64
 138 #include <asm/smp.h>
 139
 140 #define topology_thread_cpumask(cpu)    (per_cpu(cpu_sibling_map, cpu))
 141 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 142 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 143 #endif
 144 #endif
 145
 146 #endif /* __KERNEL__ */
 147 #endif  /* _ASM_POWERPC_TOPOLOGY_H */