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