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 int of_node_to_nid(struct device_node *device);
  45
  46 struct pci_bus;
  47 #ifdef CONFIG_PCI
  48 extern int pcibus_to_node(struct pci_bus *bus);
  49 #else
  50 static inline int pcibus_to_node(struct pci_bus *bus)
  51 {
  52         return -1;
  53 }
  54 #endif
  55
  56 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  57                                  cpu_all_mask :                         \
  58                                  cpumask_of_node(pcibus_to_node(bus)))
  59
  60 /* sched_domains SD_NODE_INIT for PPC64 machines */
  61 #define SD_NODE_INIT (struct sched_domain) {                            \
  62         .min_interval           = 8,                                    \
  63         .max_interval           = 32,                                   \
  64         .busy_factor            = 32,                                   \
  65         .imbalance_pct          = 125,                                  \
  66         .cache_nice_tries       = 1,                                    \
  67         .busy_idx               = 3,                                    \
  68         .idle_idx               = 1,                                    \
  69         .newidle_idx            = 0,                                    \
  70         .wake_idx               = 0,                                    \
  71         .forkexec_idx           = 0,                                    \
  72                                                                         \
  73         .flags                  = 1*SD_LOAD_BALANCE                     \
  74                                 | 1*SD_BALANCE_NEWIDLE                  \
  75                                 | 1*SD_BALANCE_EXEC                     \
  76                                 | 1*SD_BALANCE_FORK                     \
  77                                 | 0*SD_BALANCE_WAKE                     \
  78                                 | 0*SD_WAKE_AFFINE                      \
  79                                 | 0*SD_PREFER_LOCAL                     \
  80                                 | 0*SD_SHARE_CPUPOWER                   \
  81                                 | 0*SD_POWERSAVINGS_BALANCE             \
  82                                 | 0*SD_SHARE_PKG_RESOURCES              \
  83                                 | 1*SD_SERIALIZE                        \
  84                                 | 0*SD_PREFER_SIBLING                   \
  85                                 ,                                       \
  86         .last_balance           = jiffies,                              \
  87         .balance_interval       = 1,                                    \
  88 }
  89
  90 extern void __init dump_numa_cpu_topology(void);
  91
  92 extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
  93 extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
  94
  95 #else
  96
  97 static inline int of_node_to_nid(struct device_node *device)
  98 {
  99         return 0;
 100 }
 101
 102 static inline void dump_numa_cpu_topology(void) {}
 103
 104 static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
 105 {
 106         return 0;
 107 }
 108
 109 static inline void sysfs_remove_device_from_node(struct sys_device *dev,
 110                                                 int nid)
 111 {
 112 }
 113
 114 #endif /* CONFIG_NUMA */
 115
 116 #include <asm-generic/topology.h>
 117
 118 #ifdef CONFIG_SMP
 119 #include <asm/cputable.h>
 120 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
 121
 122 #ifdef CONFIG_PPC64
 123 #include <asm/smp.h>
 124
 125 #define topology_thread_cpumask(cpu)    (per_cpu(cpu_sibling_map, cpu))
 126 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 127 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 128 #endif
 129 #endif
 130
 131 #endif /* __KERNEL__ */
 132 #endif  /* _ASM_POWERPC_TOPOLOGY_H */