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