s390/kernel/numa.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * NUMA support for s390
0004  *
0005  * Implement NUMA core code.
0006  *
0007  * Copyright IBM Corp. 2015
0008  */
0009
0010 #include <linux/kernel.h>
0011 #include <linux/mmzone.h>
0012 #include <linux/cpumask.h>
0013 #include <linux/memblock.h>
0014 #include <linux/node.h>
0015 #include <asm/numa.h>
0016
0017 struct pglist_data *node_data[MAX_NUMNODES];
0018 EXPORT_SYMBOL(node_data);
0019
0020 void __init numa_setup(void)
0021 {
0022     int nid;
0023
0024     nodes_clear(node_possible_map);
0025     node_set(0, node_possible_map);
0026     node_set_online(0);
0027     for (nid = 0; nid < MAX_NUMNODES; nid++) {
0028         NODE_DATA(nid) = memblock_alloc(sizeof(pg_data_t), 8);
0029         if (!NODE_DATA(nid))
0030             panic("%s: Failed to allocate %zu bytes align=0x%x\n",
0031                   __func__, sizeof(pg_data_t), 8);
0032     }
0033     NODE_DATA(0)->node_spanned_pages = memblock_end_of_DRAM() >> PAGE_SHIFT;
0034     NODE_DATA(0)->node_id = 0;
0035 }