powerpc/pseries: Add empty update_numa_cpu_lookup_table() for NUMA=n
[pandora-kernel.git] / 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
111 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
112
113 #endif /* CONFIG_NUMA */
114
115 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
116 extern int start_topology_update(void);
117 extern int stop_topology_update(void);
118 #else
119 static inline int start_topology_update(void)
120 {
121         return 0;
122 }
123 static inline int stop_topology_update(void)
124 {
125         return 0;
126 }
127 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
128
129 #include <asm-generic/topology.h>
130
131 #ifdef CONFIG_SMP
132 #include <asm/cputable.h>
133 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
134
135 #ifdef CONFIG_PPC64
136 #include <asm/smp.h>
137
138 #define topology_thread_cpumask(cpu)    (per_cpu(cpu_sibling_map, cpu))
139 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
140 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
141 #endif
142 #endif
143
144 #endif /* __KERNEL__ */
145 #endif  /* _ASM_POWERPC_TOPOLOGY_H */