1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_NUMA_H
3 #define _ASM_X86_NUMA_H
4
5 #include <linux/nodemask.h>
6 #include <linux/errno.h>
7
8 #include <asm/topology.h>
9 #include <asm/apicdef.h>
10
11 #ifdef CONFIG_NUMA
12
13 #define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
14
15 extern int numa_off;
16
17 /*
18 * __apicid_to_node[] stores the raw mapping between physical apicid and
19 * node and is used to initialize cpu_to_node mapping.
20 *
21 * The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus
22 * should be accessed by the accessors - set_apicid_to_node() and
23 * numa_cpu_node().
24 */
25 extern s16 __apicid_to_node[MAX_LOCAL_APIC];
26 extern nodemask_t numa_nodes_parsed __initdata;
27
28 extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
29 extern void __init numa_set_distance(int from, int to, int distance);
30
31 static inline void set_apicid_to_node(int apicid, s16 node)
32 {
33 __apicid_to_node[apicid] = node;
34 }
35
36 extern int numa_cpu_node(int cpu);
37
38 #else /* CONFIG_NUMA */
39 static inline void set_apicid_to_node(int apicid, s16 node)
40 {
41 }
42
43 static inline int numa_cpu_node(int cpu)
44 {
45 return NUMA_NO_NODE;
46 }
47 #endif /* CONFIG_NUMA */
48
49 #ifdef CONFIG_X86_32
50 # include <asm/numa_32.h>
51 #endif
52
53 #ifdef CONFIG_NUMA
54 extern void numa_set_node(int cpu, int node);
55 extern void numa_clear_node(int cpu);
56 extern void __init init_cpu_to_node(void);
57 extern void numa_add_cpu(int cpu);
58 extern void numa_remove_cpu(int cpu);
59 extern void init_gi_nodes(void);
60 #else /* CONFIG_NUMA */
61 static inline void numa_set_node(int cpu, int node) { }
62 static inline void numa_clear_node(int cpu) { }
63 static inline void init_cpu_to_node(void) { }
64 static inline void numa_add_cpu(int cpu) { }
65 static inline void numa_remove_cpu(int cpu) { }
66 static inline void init_gi_nodes(void) { }
67 #endif /* CONFIG_NUMA */
68
69 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
70 void debug_cpumask_set_cpu(int cpu, int node, bool enable);
71 #endif
72
73 #ifdef CONFIG_NUMA_EMU
74 #define FAKE_NODE_MIN_SIZE ((u64)32 << 20)
75 #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
76 int numa_emu_cmdline(char *str);
77 #else /* CONFIG_NUMA_EMU */
78 static inline int numa_emu_cmdline(char *str)
79 {
80 return -EINVAL;
81 }
82 #endif /* CONFIG_NUMA_EMU */
83
84 #endif /* _ASM_X86_NUMA_H */
85
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