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
15extern 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 */
25extern s16 __apicid_to_node[MAX_LOCAL_APIC];
26extern nodemask_t numa_nodes_parsed __initdata;
27
28extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
29extern void __init numa_set_distance(int from, int to, int distance);
30
31static inline void set_apicid_to_node(int apicid, s16 node)
32{
33 __apicid_to_node[apicid] = node;
34}
35
36extern int numa_cpu_node(int cpu);
37
38#else /* CONFIG_NUMA */
39static inline void set_apicid_to_node(int apicid, s16 node)
40{
41}
42
43static 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
54extern void numa_set_node(int cpu, int node);
55extern void numa_clear_node(int cpu);
56extern void __init init_cpu_to_node(void);
57extern void numa_add_cpu(int cpu);
58extern void numa_remove_cpu(int cpu);
59extern void init_gi_nodes(void);
60#else /* CONFIG_NUMA */
61static inline void numa_set_node(int cpu, int node) { }
62static inline void numa_clear_node(int cpu) { }
63static inline void init_cpu_to_node(void) { }
64static inline void numa_add_cpu(int cpu) { }
65static inline void numa_remove_cpu(int cpu) { }
66static inline void init_gi_nodes(void) { }
67#endif /* CONFIG_NUMA */
68
69#ifdef CONFIG_DEBUG_PER_CPU_MAPS
70void 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))
76int numa_emu_cmdline(char *str);
77#else /* CONFIG_NUMA_EMU */
78static 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

source code of linux/arch/x86/include/asm/numa.h