include/asm-x86_64/topology.h

   1 #ifndef _ASM_X86_64_TOPOLOGY_H
   2 #define _ASM_X86_64_TOPOLOGY_H
   3
   4 #include <linux/config.h>
   5
   6 #ifdef CONFIG_DISCONTIGMEM
   7
   8 #include <asm/mpspec.h>
   9 #include <asm/bitops.h>
  10
  11 /* Map the K8 CPU local memory controllers to a simple 1:1 CPU:NODE topology */
  12
  13 extern cpumask_t cpu_online_map;
  14
  15 extern unsigned char cpu_to_node[];
  16 extern cpumask_t     node_to_cpumask[];
  17 extern cpumask_t pci_bus_to_cpumask[];
  18
  19 #define cpu_to_node(cpu)                (cpu_to_node[cpu])
  20 #define parent_node(node)               (node)
  21 #define node_to_first_cpu(node)         (__ffs(node_to_cpumask[node]))
  22 #define node_to_cpumask(node)           (node_to_cpumask[node])
  23
  24 static inline cpumask_t __pcibus_to_cpumask(int bus)
  25 {
  26         cpumask_t busmask = pci_bus_to_cpumask[bus];
  27         cpumask_t online = cpu_online_map;
  28         cpumask_t res;
  29         cpus_and(res, busmask, online);
  30         return res;
  31 }
  32 /* broken generic file uses #ifndef later on this */
  33 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
  34
  35 #ifdef CONFIG_NUMA
  36 /* sched_domains SD_NODE_INIT for x86_64 machines */
  37 #define SD_NODE_INIT (struct sched_domain) {            \
  38         .span                   = CPU_MASK_NONE,        \
  39         .parent                 = NULL,                 \
  40         .groups                 = NULL,                 \
  41         .min_interval           = 8,                    \
  42         .max_interval           = 32,                   \
  43         .busy_factor            = 32,                   \
  44         .imbalance_pct          = 125,                  \
  45         .cache_hot_time         = (10*1000),            \
  46         .cache_nice_tries       = 1,                    \
  47         .per_cpu_gain           = 100,                  \
  48         .flags                  = SD_LOAD_BALANCE       \
  49                                 | SD_BALANCE_EXEC       \
  50                                 | SD_WAKE_BALANCE,      \
  51         .last_balance           = jiffies,              \
  52         .balance_interval       = 1,                    \
  53         .nr_balance_failed      = 0,                    \
  54 }
  55 #endif
  56
  57 #endif
  58
  59 #include <asm-generic/topology.h>
  60
  61 #endif