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 21 extern 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 */ 31 extern s16 __apicid_to_node[MAX_LOCAL_APIC]; 32 extern nodemask_t numa_nodes_parsed __initdata; 33 34 extern int __init numa_add_memblk(int nodeid, u64 start, u64 end); 35 extern void __init numa_set_distance(int from, int to, int distance); 36 37 static inline void set_apicid_to_node(int apicid, s16 node) 38 { 39 __apicid_to_node[apicid] = node; 40 } 41 42 extern int numa_cpu_node(int cpu); 43 44 #else /* CONFIG_NUMA */ 45 static inline void set_apicid_to_node(int apicid, s16 node) 46 { 47 } 48 49 static 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 60 extern void numa_set_node(int cpu, int node); 61 extern void numa_clear_node(int cpu); 62 extern void __init init_cpu_to_node(void); 63 extern void numa_add_cpu(int cpu); 64 extern void numa_remove_cpu(int cpu); 65 #else /* CONFIG_NUMA */ 66 static inline void numa_set_node(int cpu, int node) { } 67 static inline void numa_clear_node(int cpu) { } 68 static inline void init_cpu_to_node(void) { } 69 static inline void numa_add_cpu(int cpu) { } 70 static inline void numa_remove_cpu(int cpu) { } 71 #endif /* CONFIG_NUMA */ 72 73 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 74 void 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)) 80 void numa_emu_cmdline(char *); 81 #endif /* CONFIG_NUMA_EMU */ 82 83 #endif /* _ASM_X86_NUMA_H */ 84