arch/s390/kernel/numa.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * NUMA support for s390
   4  *
   5  * Implement NUMA core code.
   6  *
   7  * Copyright IBM Corp. 2015
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/mmzone.h>
  12 #include <linux/cpumask.h>
  13 #include <linux/memblock.h>
  14 #include <linux/node.h>
  15 #include <asm/numa.h>
  16
  17 struct pglist_data *node_data[MAX_NUMNODES];
  18 EXPORT_SYMBOL(node_data);
  19
  20 void __init numa_setup(void)
  21 {
  22         int nid;
  23
  24         nodes_clear(node_possible_map);
  25         node_set(0, node_possible_map);
  26         node_set_online(0);
  27         for (nid = 0; nid < MAX_NUMNODES; nid++) {
  28                 NODE_DATA(nid) = memblock_alloc(sizeof(pg_data_t), 8);
  29                 if (!NODE_DATA(nid))
  30                         panic("%s: Failed to allocate %zu bytes align=0x%x\n",
  31                               __func__, sizeof(pg_data_t), 8);
  32         }
  33         NODE_DATA(0)->node_spanned_pages = memblock_end_of_DRAM() >> PAGE_SHIFT;
  34         NODE_DATA(0)->node_id = 0;
  35 }
  36
  37 static int __init numa_init_late(void)
  38 {
  39         register_one_node(0);
  40         return 0;
  41 }
  42 arch_initcall(numa_init_late);