| 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> |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 6 | #include <linux/errno.h> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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); |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 66 | extern void init_gi_nodes(void); |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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) { } |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 73 | static inline void init_gi_nodes(void) { } |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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)) |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 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 | } |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 89 | #endif /* CONFIG_NUMA_EMU */ |
| 90 | |
| 91 | #endif /* _ASM_X86_NUMA_H */ |