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 extern 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 */ 23 extern s16 __apicid_to_node[MAX_LOCAL_APIC]; 24 extern nodemask_t numa_nodes_parsed __initdata; 25 extern nodemask_t numa_phys_nodes_parsed __initdata; 26 27 static inline void set_apicid_to_node(int apicid, s16 node) 28 { 29 __apicid_to_node[apicid] = node; 30 } 31 32 extern int numa_cpu_node(int cpu); 33 34 #else /* CONFIG_NUMA */ 35 static inline void set_apicid_to_node(int apicid, s16 node) 36 { 37 } 38 39 static inline int numa_cpu_node(int cpu) 40 { 41 return NUMA_NO_NODE; 42 } 43 #endif /* CONFIG_NUMA */ 44 45 #ifdef CONFIG_NUMA 46 extern void numa_set_node(int cpu, int node); 47 extern void numa_clear_node(int cpu); 48 extern void __init init_cpu_to_node(void); 49 extern void numa_add_cpu(unsigned int cpu); 50 extern void numa_remove_cpu(unsigned int cpu); 51 extern void init_gi_nodes(void); 52 extern int num_phys_nodes(void); 53 #else /* CONFIG_NUMA */ 54 static inline void numa_set_node(int cpu, int node) { } 55 static inline void numa_clear_node(int cpu) { } 56 static inline void init_cpu_to_node(void) { } 57 static inline void numa_add_cpu(unsigned int cpu) { } 58 static inline void numa_remove_cpu(unsigned int cpu) { } 59 static inline void init_gi_nodes(void) { } 60 static inline int num_phys_nodes(void) 61 { 62 return 1; 63 } 64 #endif /* CONFIG_NUMA */ 65 66 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 67 void debug_cpumask_set_cpu(unsigned int cpu, int node, bool enable); 68 #endif 69 70 #endif /* _ASM_X86_NUMA_H */ 71