| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |