LXR linux/arch/x86/include/asm/numa.h

   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
   7#include <asm/topology.h>
   8#include <asm/apicdef.h>
   9
  10#ifdef CONFIG_NUMA
  11
  12#define NR_NODE_MEMBLKS         (MAX_NUMNODES*2)
  13
  14/*
  15 * Too small node sizes may confuse the VM badly. Usually they
  16 * result from BIOS bugs. So dont recognize nodes as standalone
  17 * NUMA entities that have less than this amount of RAM listed:
  18 */
  19#define NODE_MIN_SIZE (4*1024*1024)
  20
  21extern int numa_off;
  22
  23/*
  24 * __apicid_to_node[] stores the raw mapping between physical apicid and
  25 * node and is used to initialize cpu_to_node mapping.
  26 *
  27 * The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus
  28 * should be accessed by the accessors - set_apicid_to_node() and
  29 * numa_cpu_node().
  30 */
  31extern s16 __apicid_to_node[MAX_LOCAL_APIC];
  32extern nodemask_t numa_nodes_parsed __initdata;
  33
  34extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  35extern void __init numa_set_distance(int from, int to, int distance);
  36
  37static inline void set_apicid_to_node(int apicid, s16 node)
  38{
  39        __apicid_to_node[apicid] = node;
  40}
  41
  42extern int numa_cpu_node(int cpu);
  43
  44#else   /* CONFIG_NUMA */
  45static inline void set_apicid_to_node(int apicid, s16 node)
  46{
  47}
  48
  49static inline int numa_cpu_node(int cpu)
  50{
  51        return NUMA_NO_NODE;
  52}
  53#endif  /* CONFIG_NUMA */
  54
  55#ifdef CONFIG_X86_32
  56# include <asm/numa_32.h>
  57#endif
  58
  59#ifdef CONFIG_NUMA
  60extern void numa_set_node(int cpu, int node);
  61extern void numa_clear_node(int cpu);
  62extern void __init init_cpu_to_node(void);
  63extern void numa_add_cpu(int cpu);
  64extern void numa_remove_cpu(int cpu);
  65#else   /* CONFIG_NUMA */
  66static inline void numa_set_node(int cpu, int node)     { }
  67static inline void numa_clear_node(int cpu)             { }
  68static inline void init_cpu_to_node(void)               { }
  69static inline void numa_add_cpu(int cpu)                { }
  70static inline void numa_remove_cpu(int cpu)             { }
  71#endif  /* CONFIG_NUMA */
  72
  73#ifdef CONFIG_DEBUG_PER_CPU_MAPS
  74void debug_cpumask_set_cpu(int cpu, int node, bool enable);
  75#endif
  76
  77#ifdef CONFIG_NUMA_EMU
  78#define FAKE_NODE_MIN_SIZE      ((u64)32 << 20)
  79#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
  80void numa_emu_cmdline(char *);
  81#endif /* CONFIG_NUMA_EMU */
  82
  83#endif  /* _ASM_X86_NUMA_H */
  84