/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_NUMA_H
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#define _ASM_X86_NUMA_H
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#include <linux/nodemask.h>
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#include <linux/errno.h>
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#include <asm/topology.h>
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#include <asm/apicdef.h>
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#ifdef CONFIG_NUMA
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#define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
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/*
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* Too small node sizes may confuse the VM badly. Usually they
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* result from BIOS bugs. So dont recognize nodes as standalone
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* NUMA entities that have less than this amount of RAM listed:
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*/
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#define NODE_MIN_SIZE (4*1024*1024)
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extern int numa_off;
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/*
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* __apicid_to_node[] stores the raw mapping between physical apicid and
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* node and is used to initialize cpu_to_node mapping.
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*
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* The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus
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* should be accessed by the accessors - set_apicid_to_node() and
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* numa_cpu_node().
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*/
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extern s16 __apicid_to_node[MAX_LOCAL_APIC];
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extern nodemask_t numa_nodes_parsed __initdata;
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extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
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extern void __init numa_set_distance(int from, int to, int distance);
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static inline void set_apicid_to_node(int apicid, s16 node)
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{
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__apicid_to_node[apicid] = node;
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}
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extern int numa_cpu_node(int cpu);
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#else /* CONFIG_NUMA */
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static inline void set_apicid_to_node(int apicid, s16 node)
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{
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}
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static inline int numa_cpu_node(int cpu)
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{
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return NUMA_NO_NODE;
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}
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#endif /* CONFIG_NUMA */
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#ifdef CONFIG_X86_32
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# include <asm/numa_32.h>
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#endif
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#ifdef CONFIG_NUMA
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extern void numa_set_node(int cpu, int node);
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extern void numa_clear_node(int cpu);
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extern void __init init_cpu_to_node(void);
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extern void numa_add_cpu(int cpu);
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extern void numa_remove_cpu(int cpu);
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extern void init_gi_nodes(void);
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#else /* CONFIG_NUMA */
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static inline void numa_set_node(int cpu, int node) { }
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static inline void numa_clear_node(int cpu) { }
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static inline void init_cpu_to_node(void) { }
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static inline void numa_add_cpu(int cpu) { }
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static inline void numa_remove_cpu(int cpu) { }
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static inline void init_gi_nodes(void) { }
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#endif /* CONFIG_NUMA */
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#ifdef CONFIG_DEBUG_PER_CPU_MAPS
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void debug_cpumask_set_cpu(int cpu, int node, bool enable);
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#endif
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#ifdef CONFIG_NUMA_EMU
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#define FAKE_NODE_MIN_SIZE ((u64)32 << 20)
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#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
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int numa_emu_cmdline(char *str);
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#else /* CONFIG_NUMA_EMU */
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static inline int numa_emu_cmdline(char *str)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_NUMA_EMU */
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#endif /* _ASM_X86_NUMA_H */
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