Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2
3#include <linux/memblock.h>
4#include <linux/printk.h>
5#include <linux/numa.h>
6#include <linux/numa_memblks.h>
7
8struct pglist_data *node_data[MAX_NUMNODES];
9EXPORT_SYMBOL(node_data);
10
11/* Allocate NODE_DATA for a node on the local memory */
12void __init alloc_node_data(int nid)
13{
14 const size_t nd_size = roundup(sizeof(pg_data_t), SMP_CACHE_BYTES);
15 u64 nd_pa;
16 void *nd;
17 int tnid;
18
19 /* Allocate node data. Try node-local memory and then any node. */
20 nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
21 if (!nd_pa)
22 panic("Cannot allocate %zu bytes for node %d data\n",
23 nd_size, nid);
24 nd = __va(nd_pa);
25
26 /* report and initialize */
27 pr_info("NODE_DATA(%d) allocated [mem %#010Lx-%#010Lx]\n", nid,
28 nd_pa, nd_pa + nd_size - 1);
29 tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
30 if (tnid != nid)
31 pr_info(" NODE_DATA(%d) on node %d\n", nid, tnid);
32
33 node_data[nid] = nd;
34 memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
35}
36
37void __init alloc_offline_node_data(int nid)
38{
39 pg_data_t *pgdat;
40
41 pgdat = memblock_alloc(sizeof(*pgdat), SMP_CACHE_BYTES);
42 if (!pgdat)
43 panic("Cannot allocate %zuB for node %d.\n",
44 sizeof(*pgdat), nid);
45
46 node_data[nid] = pgdat;
47}
48
49/* Stub functions: */
50
51#ifndef memory_add_physaddr_to_nid
52int memory_add_physaddr_to_nid(u64 start)
53{
54 pr_info_once("Unknown online node for memory at 0x%llx, assuming node 0\n",
55 start);
56 return 0;
57}
58EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
59#endif
60
61#ifndef phys_to_target_node
62int phys_to_target_node(u64 start)
63{
64 pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n",
65 start);
66 return 0;
67}
68EXPORT_SYMBOL_GPL(phys_to_target_node);
69#endif