| 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(nid: 0); |
| 27 | for (nid = 0; nid < MAX_NUMNODES; nid++) { |
| 28 | NODE_DATA(nid) = memblock_alloc(size: sizeof(pg_data_t), align: 8); |
| 29 | if (!NODE_DATA(nid)) |
| 30 | panic(fmt: "%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 |