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
13extern int numa_off;
14
15/*
16 * __apicid_to_node[] stores the raw mapping between physical apicid and
17 * node and is used to initialize cpu_to_node mapping.
18 *
19 * The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus
20 * should be accessed by the accessors - set_apicid_to_node() and
21 * numa_cpu_node().
22 */
23extern s16 __apicid_to_node[MAX_LOCAL_APIC];
24extern nodemask_t numa_nodes_parsed __initdata;
25
26static inline void set_apicid_to_node(int apicid, s16 node)
27{
28 __apicid_to_node[apicid] = node;
29}
30
31extern int numa_cpu_node(int cpu);
32
33#else /* CONFIG_NUMA */
34static inline void set_apicid_to_node(int apicid, s16 node)
35{
36}
37
38static inline int numa_cpu_node(int cpu)
39{
40 return NUMA_NO_NODE;
41}
42#endif /* CONFIG_NUMA */
43
44#ifdef CONFIG_NUMA
45extern void numa_set_node(int cpu, int node);
46extern void numa_clear_node(int cpu);
47extern void __init init_cpu_to_node(void);
48extern void numa_add_cpu(unsigned int cpu);
49extern void numa_remove_cpu(unsigned int cpu);
50extern void init_gi_nodes(void);
51#else /* CONFIG_NUMA */
52static inline void numa_set_node(int cpu, int node) { }
53static inline void numa_clear_node(int cpu) { }
54static inline void init_cpu_to_node(void) { }
55static inline void numa_add_cpu(unsigned int cpu) { }
56static inline void numa_remove_cpu(unsigned int cpu) { }
57static inline void init_gi_nodes(void) { }
58#endif /* CONFIG_NUMA */
59
60#ifdef CONFIG_DEBUG_PER_CPU_MAPS
61void debug_cpumask_set_cpu(unsigned int cpu, int node, bool enable);
62#endif
63
64#endif /* _ASM_X86_NUMA_H */
65

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