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