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 
numa_setup(void)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