LXR linux/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
  17struct pglist_data *node_data[MAX_NUMNODES];
  18EXPORT_SYMBOL(node_data);
  19
  20void __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
  37static int __init numa_init_late(void)
  38{
  39        register_one_node(0);
  40        return 0;
  41}
  42arch_initcall(numa_init_late);
  43