Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_NUMA_H
3#define _LINUX_NUMA_H
4#include <linux/types.h>
5
6#ifdef CONFIG_NODES_SHIFT
7#define NODES_SHIFT CONFIG_NODES_SHIFT
8#else
9#define NODES_SHIFT 0
10#endif
11
12#define MAX_NUMNODES (1 << NODES_SHIFT)
13
14#define NUMA_NO_NODE (-1)
15#define NUMA_NO_MEMBLK (-1)
16
17/* optionally keep NUMA memory info available post init */
18#ifdef CONFIG_NUMA_KEEP_MEMINFO
19#define __initdata_or_meminfo
20#else
21#define __initdata_or_meminfo __initdata
22#endif
23
24#ifdef CONFIG_NUMA
25#include <linux/printk.h>
26#include <asm/sparsemem.h>
27
28/* Generic implementation available */
29int numa_nearest_node(int node, unsigned int state);
30
31#ifndef memory_add_physaddr_to_nid
32static inline int memory_add_physaddr_to_nid(u64 start)
33{
34 pr_info_once("Unknown online node for memory at 0x%llx, assuming node 0\n",
35 start);
36 return 0;
37}
38#endif
39#ifndef phys_to_target_node
40static inline int phys_to_target_node(u64 start)
41{
42 pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n",
43 start);
44 return 0;
45}
46#endif
47#ifndef numa_fill_memblks
48static inline int __init numa_fill_memblks(u64 start, u64 end)
49{
50 return NUMA_NO_MEMBLK;
51}
52#endif
53#else /* !CONFIG_NUMA */
54static inline int numa_nearest_node(int node, unsigned int state)
55{
56 return NUMA_NO_NODE;
57}
58
59static inline int memory_add_physaddr_to_nid(u64 start)
60{
61 return 0;
62}
63static inline int phys_to_target_node(u64 start)
64{
65 return 0;
66}
67#endif
68
69#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)
70
71#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
72extern const struct attribute_group arch_node_dev_group;
73#endif
74
75#endif /* _LINUX_NUMA_H */