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