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 /* 16 * Too small node sizes may confuse the VM badly. Usually they 17 * result from BIOS bugs. So dont recognize nodes as standalone 18 * NUMA entities that have less than this amount of RAM listed: 19 */ 20 #define NODE_MIN_SIZE (4*1024*1024) 21 22 extern int numa_off; 23 24 /* 25 * __apicid_to_node[] stores the raw mapping between physical apicid and 26 * node and is used to initialize cpu_to_node mapping. 27 * 28 * The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus 29 * should be accessed by the accessors - set_apicid_to_node() and 30 * numa_cpu_node(). 31 */ 32 extern s16 __apicid_to_node[MAX_LOCAL_APIC]; 33 extern nodemask_t numa_nodes_parsed __initdata; 34 35 extern int __init numa_add_memblk(int nodeid, u64 start, u64 end); 36 extern void __init numa_set_distance(int from, int to, int distance); 37 38 static inline void set_apicid_to_node(int apicid, s16 node) 39 { 40 __apicid_to_node[apicid] = node; 41 } 42 43 extern int numa_cpu_node(int cpu); 44 45 #else /* CONFIG_NUMA */ 46 static inline void set_apicid_to_node(int apicid, s16 node) 47 { 48 } 49 50 static inline int numa_cpu_node(int cpu) 51 { 52 return NUMA_NO_NODE; 53 } 54 #endif /* CONFIG_NUMA */ 55 56 #ifdef CONFIG_X86_32 57 # include <asm/numa_32.h> 58 #endif 59 60 #ifdef CONFIG_NUMA 61 extern void numa_set_node(int cpu, int node); 62 extern void numa_clear_node(int cpu); 63 extern void __init init_cpu_to_node(void); 64 extern void numa_add_cpu(int cpu); 65 extern void numa_remove_cpu(int cpu); 66 extern void init_gi_nodes(void); 67 #else /* CONFIG_NUMA */ 68 static inline void numa_set_node(int cpu, int node) { } 69 static inline void numa_clear_node(int cpu) { } 70 static inline void init_cpu_to_node(void) { } 71 static inline void numa_add_cpu(int cpu) { } 72 static inline void numa_remove_cpu(int cpu) { } 73 static inline void init_gi_nodes(void) { } 74 #endif /* CONFIG_NUMA */ 75 76 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 77 void debug_cpumask_set_cpu(int cpu, int node, bool enable); 78 #endif 79 80 #ifdef CONFIG_NUMA_EMU 81 #define FAKE_NODE_MIN_SIZE ((u64)32 << 20) 82 #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL)) 83 int numa_emu_cmdline(char *str); 84 #else /* CONFIG_NUMA_EMU */ 85 static inline int numa_emu_cmdline(char *str) 86 { 87 return -EINVAL; 88 } 89 #endif /* CONFIG_NUMA_EMU */ 90 91 #endif /* _ASM_X86_NUMA_H */ 92