Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Generic VM initialization for x86-64 NUMA setups. |
| 3 | * Copyright 2002,2003 Andi Kleen, SuSE Labs. |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 4 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/kernel.h> |
| 6 | #include <linux/mm.h> |
| 7 | #include <linux/string.h> |
| 8 | #include <linux/init.h> |
| 9 | #include <linux/bootmem.h> |
| 10 | #include <linux/mmzone.h> |
| 11 | #include <linux/ctype.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/nodemask.h> |
travis@sgi.com | 3cc87e3 | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 14 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #include <asm/e820.h> |
| 17 | #include <asm/proto.h> |
| 18 | #include <asm/dma.h> |
| 19 | #include <asm/numa.h> |
| 20 | #include <asm/acpi.h> |
Thomas Gleixner | c9ff034 | 2008-01-30 13:30:16 +0100 | [diff] [blame] | 21 | #include <asm/k8.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #ifndef Dprintk |
| 24 | #define Dprintk(x...) |
| 25 | #endif |
| 26 | |
Ravikiran G Thirumalai | 6c231b7 | 2005-09-06 15:17:45 -0700 | [diff] [blame] | 27 | struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 28 | EXPORT_SYMBOL(node_data); |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | bootmem_data_t plat_node_bdata[MAX_NUMNODES]; |
| 31 | |
Eric Dumazet | dcf36bf | 2006-03-25 16:31:46 +0100 | [diff] [blame] | 32 | struct memnode memnode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 34 | int x86_cpu_to_node_map_init[NR_CPUS] = { |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 35 | [0 ... NR_CPUS-1] = NUMA_NO_NODE |
Andi Kleen | 0b07e98 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 36 | }; |
travis@sgi.com | df3825c | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 37 | void *x86_cpu_to_node_map_early_ptr; |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 38 | DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE; |
travis@sgi.com | df3825c | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 39 | EXPORT_PER_CPU_SYMBOL(x86_cpu_to_node_map); |
travis@sgi.com | c49a495 | 2008-01-30 13:33:22 +0100 | [diff] [blame] | 40 | EXPORT_SYMBOL(x86_cpu_to_node_map_early_ptr); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 41 | |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 42 | s16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 43 | [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 44 | }; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 45 | |
Thomas Gleixner | 7462894 | 2008-01-30 13:30:38 +0100 | [diff] [blame] | 46 | cpumask_t node_to_cpumask_map[MAX_NUMNODES] __read_mostly; |
| 47 | EXPORT_SYMBOL(node_to_cpumask_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | int numa_off __initdata; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 50 | unsigned long __initdata nodemap_addr; |
| 51 | unsigned long __initdata nodemap_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 53 | /* |
| 54 | * Given a shift value, try to populate memnodemap[] |
| 55 | * Returns : |
| 56 | * 1 if OK |
| 57 | * 0 if memnodmap[] too small (of shift too small) |
| 58 | * -1 if node overlap or lost ram (shift too big) |
| 59 | */ |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 60 | static int __init populate_memnodemap(const struct bootnode *nodes, |
| 61 | int numnodes, int shift) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 63 | unsigned long addr, end; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 64 | int i, res = -1; |
Keith Mannthey | b684664 | 2005-07-28 21:15:38 -0700 | [diff] [blame] | 65 | |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 66 | memset(memnodemap, 0xff, sizeof(s16)*memnodemapsize); |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 67 | for (i = 0; i < numnodes; i++) { |
| 68 | addr = nodes[i].start; |
| 69 | end = nodes[i].end; |
| 70 | if (addr >= end) |
| 71 | continue; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 72 | if ((end >> shift) >= memnodemapsize) |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 73 | return 0; |
| 74 | do { |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 75 | if (memnodemap[addr >> shift] != NUMA_NO_NODE) |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 76 | return -1; |
| 77 | memnodemap[addr >> shift] = i; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 78 | addr += (1UL << shift); |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 79 | } while (addr < end); |
| 80 | res = 1; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 81 | } |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 82 | return res; |
| 83 | } |
| 84 | |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 85 | static int __init allocate_cachealigned_memnodemap(void) |
| 86 | { |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 87 | unsigned long addr; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 88 | |
| 89 | memnodemap = memnode.embedded_map; |
travis@sgi.com | 316390b | 2008-01-30 13:33:15 +0100 | [diff] [blame] | 90 | if (memnodemapsize <= ARRAY_SIZE(memnode.embedded_map)) |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 91 | return 0; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 92 | |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 93 | addr = 0x8000; |
| 94 | nodemap_size = round_up(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES); |
| 95 | nodemap_addr = find_e820_area(addr, end_pfn<<PAGE_SHIFT, |
| 96 | nodemap_size, L1_CACHE_BYTES); |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 97 | if (nodemap_addr == -1UL) { |
| 98 | printk(KERN_ERR |
| 99 | "NUMA: Unable to allocate Memory to Node hash map\n"); |
| 100 | nodemap_addr = nodemap_size = 0; |
| 101 | return -1; |
| 102 | } |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 103 | memnodemap = phys_to_virt(nodemap_addr); |
Yinghai Lu | 25eff8d | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 104 | reserve_early(nodemap_addr, nodemap_addr + nodemap_size, "MEMNODEMAP"); |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 105 | |
| 106 | printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n", |
| 107 | nodemap_addr, nodemap_addr + nodemap_size); |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | /* |
| 112 | * The LSB of all start and end addresses in the node map is the value of the |
| 113 | * maximum possible shift. |
| 114 | */ |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 115 | static int __init extract_lsb_from_nodes(const struct bootnode *nodes, |
| 116 | int numnodes) |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 117 | { |
Amul Shah | 5441392 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 118 | int i, nodes_used = 0; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 119 | unsigned long start, end; |
| 120 | unsigned long bitfield = 0, memtop = 0; |
| 121 | |
| 122 | for (i = 0; i < numnodes; i++) { |
| 123 | start = nodes[i].start; |
| 124 | end = nodes[i].end; |
| 125 | if (start >= end) |
| 126 | continue; |
Amul Shah | 5441392 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 127 | bitfield |= start; |
| 128 | nodes_used++; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 129 | if (end > memtop) |
| 130 | memtop = end; |
| 131 | } |
Amul Shah | 5441392 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 132 | if (nodes_used <= 1) |
| 133 | i = 63; |
| 134 | else |
| 135 | i = find_first_bit(&bitfield, sizeof(unsigned long)*8); |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 136 | memnodemapsize = (memtop >> i)+1; |
| 137 | return i; |
| 138 | } |
| 139 | |
Andi Kleen | abe059e | 2006-03-25 16:29:12 +0100 | [diff] [blame] | 140 | int __init compute_hash_shift(struct bootnode *nodes, int numnodes) |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 141 | { |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 142 | int shift; |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 143 | |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 144 | shift = extract_lsb_from_nodes(nodes, numnodes); |
| 145 | if (allocate_cachealigned_memnodemap()) |
| 146 | return -1; |
Andi Kleen | 6b050f8 | 2006-01-11 22:44:33 +0100 | [diff] [blame] | 147 | printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n", |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 148 | shift); |
| 149 | |
| 150 | if (populate_memnodemap(nodes, numnodes, shift) != 1) { |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 151 | printk(KERN_INFO "Your memory is not aligned you need to " |
| 152 | "rebuild your kernel with a bigger NODEMAPSIZE " |
| 153 | "shift=%d\n", shift); |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 154 | return -1; |
| 155 | } |
Keith Mannthey | b684664 | 2005-07-28 21:15:38 -0700 | [diff] [blame] | 156 | return shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 159 | int early_pfn_to_nid(unsigned long pfn) |
| 160 | { |
| 161 | return phys_to_nid(pfn << PAGE_SHIFT); |
| 162 | } |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 163 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 164 | static void * __init early_node_mem(int nodeid, unsigned long start, |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 165 | unsigned long end, unsigned long size, |
| 166 | unsigned long align) |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 167 | { |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 168 | unsigned long mem = find_e820_area(start, end, size, align); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 169 | void *ptr; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 170 | |
Yinghai Lu | 9347e0b | 2008-02-01 17:49:42 +0100 | [diff] [blame] | 171 | if (mem != -1L) |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 172 | return __va(mem); |
Yinghai Lu | 9347e0b | 2008-02-01 17:49:42 +0100 | [diff] [blame] | 173 | |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 174 | ptr = __alloc_bootmem_nopanic(size, align, __pa(MAX_DMA_ADDRESS)); |
Yoann Padioleau | 83e83d5 | 2007-10-17 18:04:35 +0200 | [diff] [blame] | 175 | if (ptr == NULL) { |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 176 | printk(KERN_ERR "Cannot find %lu bytes in node %d\n", |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 177 | size, nodeid); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 178 | return NULL; |
| 179 | } |
| 180 | return ptr; |
| 181 | } |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | /* Initialize bootmem allocator for a node */ |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 184 | void __init setup_node_bootmem(int nodeid, unsigned long start, |
| 185 | unsigned long end) |
| 186 | { |
| 187 | unsigned long start_pfn, end_pfn, bootmap_pages, bootmap_size; |
| 188 | unsigned long bootmap_start, nodedata_phys; |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 189 | void *bootmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | const int pgdat_size = round_up(sizeof(pg_data_t), PAGE_SIZE); |
| 191 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 192 | start = round_up(start, ZONE_ALIGN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 194 | printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid, |
| 195 | start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | start_pfn = start >> PAGE_SHIFT; |
| 198 | end_pfn = end >> PAGE_SHIFT; |
| 199 | |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 200 | node_data[nodeid] = early_node_mem(nodeid, start, end, pgdat_size, |
| 201 | SMP_CACHE_BYTES); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 202 | if (node_data[nodeid] == NULL) |
| 203 | return; |
| 204 | nodedata_phys = __pa(node_data[nodeid]); |
Yinghai Lu | 6118f76 | 2008-02-04 16:47:56 +0100 | [diff] [blame] | 205 | printk(KERN_INFO " NODE_DATA [%016lx - %016lx]\n", nodedata_phys, |
| 206 | nodedata_phys + pgdat_size - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t)); |
| 209 | NODE_DATA(nodeid)->bdata = &plat_node_bdata[nodeid]; |
| 210 | NODE_DATA(nodeid)->node_start_pfn = start_pfn; |
| 211 | NODE_DATA(nodeid)->node_spanned_pages = end_pfn - start_pfn; |
| 212 | |
| 213 | /* Find a place for the bootmem map */ |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 214 | bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | bootmap_start = round_up(nodedata_phys + pgdat_size, PAGE_SIZE); |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 216 | /* |
| 217 | * SMP_CAHCE_BYTES could be enough, but init_bootmem_node like |
| 218 | * to use that to align to PAGE_SIZE |
| 219 | */ |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 220 | bootmap = early_node_mem(nodeid, bootmap_start, end, |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 221 | bootmap_pages<<PAGE_SHIFT, PAGE_SIZE); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 222 | if (bootmap == NULL) { |
| 223 | if (nodedata_phys < start || nodedata_phys >= end) |
Yinghai Lu | 37bff62 | 2008-03-18 12:40:04 -0700 | [diff] [blame^] | 224 | free_bootmem(nodedata_phys, pgdat_size); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 225 | node_data[nodeid] = NULL; |
| 226 | return; |
| 227 | } |
| 228 | bootmap_start = __pa(bootmap); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | bootmap_size = init_bootmem_node(NODE_DATA(nodeid), |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 231 | bootmap_start >> PAGE_SHIFT, |
| 232 | start_pfn, end_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Yinghai Lu | 6118f76 | 2008-02-04 16:47:56 +0100 | [diff] [blame] | 234 | printk(KERN_INFO " bootmap [%016lx - %016lx] pages %lx\n", |
| 235 | bootmap_start, bootmap_start + bootmap_size - 1, |
| 236 | bootmap_pages); |
| 237 | |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 238 | free_bootmem_with_active_regions(nodeid, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 240 | reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, pgdat_size, |
| 241 | BOOTMEM_DEFAULT); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 242 | reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start, |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 243 | bootmap_pages<<PAGE_SHIFT, BOOTMEM_DEFAULT); |
Andi Kleen | 68a3a7f | 2006-04-07 19:49:18 +0200 | [diff] [blame] | 244 | #ifdef CONFIG_ACPI_NUMA |
| 245 | srat_reserve_add_area(nodeid); |
| 246 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | node_set_online(nodeid); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 250 | /* |
| 251 | * There are unfortunately some poorly designed mainboards around that |
| 252 | * only connect memory to a single CPU. This breaks the 1:1 cpu->node |
| 253 | * mapping. To avoid this fill in the mapping for all possible CPUs, |
| 254 | * as the number of CPUs is not known yet. We round robin the existing |
| 255 | * nodes. |
| 256 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | void __init numa_init_array(void) |
| 258 | { |
| 259 | int rr, i; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 260 | |
Ravikiran G Thirumalai | 85cc513 | 2005-09-30 11:59:22 -0700 | [diff] [blame] | 261 | rr = first_node(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | for (i = 0; i < NR_CPUS; i++) { |
travis@sgi.com | 1ce3571 | 2008-01-30 13:33:33 +0100 | [diff] [blame] | 263 | if (early_cpu_to_node(i) != NUMA_NO_NODE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | continue; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 265 | numa_set_node(i, rr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | rr = next_node(rr, node_online_map); |
| 267 | if (rr == MAX_NUMNODES) |
| 268 | rr = first_node(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | #ifdef CONFIG_NUMA_EMU |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 273 | /* Numa emulation */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 274 | char *cmdline __initdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 276 | /* |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 277 | * Setups up nid to range from addr to addr + size. If the end |
| 278 | * boundary is greater than max_addr, then max_addr is used instead. |
| 279 | * The return value is 0 if there is additional memory left for |
| 280 | * allocation past addr and -1 otherwise. addr is adjusted to be at |
| 281 | * the end of the node. |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 282 | */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 283 | static int __init setup_node_range(int nid, struct bootnode *nodes, u64 *addr, |
| 284 | u64 size, u64 max_addr) |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 285 | { |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 286 | int ret = 0; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 287 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 288 | nodes[nid].start = *addr; |
| 289 | *addr += size; |
| 290 | if (*addr >= max_addr) { |
| 291 | *addr = max_addr; |
| 292 | ret = -1; |
| 293 | } |
| 294 | nodes[nid].end = *addr; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 295 | node_set(nid, node_possible_map); |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 296 | printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n", nid, |
| 297 | nodes[nid].start, nodes[nid].end, |
| 298 | (nodes[nid].end - nodes[nid].start) >> 20); |
| 299 | return ret; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 300 | } |
| 301 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 302 | /* |
| 303 | * Splits num_nodes nodes up equally starting at node_start. The return value |
| 304 | * is the number of nodes split up and addr is adjusted to be at the end of the |
| 305 | * last node allocated. |
| 306 | */ |
| 307 | static int __init split_nodes_equally(struct bootnode *nodes, u64 *addr, |
| 308 | u64 max_addr, int node_start, |
| 309 | int num_nodes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | { |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 311 | unsigned int big; |
| 312 | u64 size; |
| 313 | int i; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 314 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 315 | if (num_nodes <= 0) |
| 316 | return -1; |
| 317 | if (num_nodes > MAX_NUMNODES) |
| 318 | num_nodes = MAX_NUMNODES; |
David Rientjes | a7e9662 | 2007-07-21 17:11:29 +0200 | [diff] [blame] | 319 | size = (max_addr - *addr - e820_hole_size(*addr, max_addr)) / |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 320 | num_nodes; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 321 | /* |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 322 | * Calculate the number of big nodes that can be allocated as a result |
| 323 | * of consolidating the leftovers. |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 324 | */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 325 | big = ((size & ~FAKE_NODE_MIN_HASH_MASK) * num_nodes) / |
| 326 | FAKE_NODE_MIN_SIZE; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 327 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 328 | /* Round down to nearest FAKE_NODE_MIN_SIZE. */ |
| 329 | size &= FAKE_NODE_MIN_HASH_MASK; |
| 330 | if (!size) { |
| 331 | printk(KERN_ERR "Not enough memory for each node. " |
| 332 | "NUMA emulation disabled.\n"); |
| 333 | return -1; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 334 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 335 | |
| 336 | for (i = node_start; i < num_nodes + node_start; i++) { |
| 337 | u64 end = *addr + size; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 338 | |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 339 | if (i < big) |
| 340 | end += FAKE_NODE_MIN_SIZE; |
| 341 | /* |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 342 | * The final node can have the remaining system RAM. Other |
| 343 | * nodes receive roughly the same amount of available pages. |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 344 | */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 345 | if (i == num_nodes + node_start - 1) |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 346 | end = max_addr; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 347 | else |
David Rientjes | a7e9662 | 2007-07-21 17:11:29 +0200 | [diff] [blame] | 348 | while (end - *addr - e820_hole_size(*addr, end) < |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 349 | size) { |
| 350 | end += FAKE_NODE_MIN_SIZE; |
| 351 | if (end > max_addr) { |
| 352 | end = max_addr; |
| 353 | break; |
| 354 | } |
| 355 | } |
| 356 | if (setup_node_range(i, nodes, addr, end - *addr, max_addr) < 0) |
| 357 | break; |
| 358 | } |
| 359 | return i - node_start + 1; |
| 360 | } |
| 361 | |
| 362 | /* |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 363 | * Splits the remaining system RAM into chunks of size. The remaining memory is |
| 364 | * always assigned to a final node and can be asymmetric. Returns the number of |
| 365 | * nodes split. |
| 366 | */ |
| 367 | static int __init split_nodes_by_size(struct bootnode *nodes, u64 *addr, |
| 368 | u64 max_addr, int node_start, u64 size) |
| 369 | { |
| 370 | int i = node_start; |
| 371 | size = (size << 20) & FAKE_NODE_MIN_HASH_MASK; |
| 372 | while (!setup_node_range(i++, nodes, addr, size, max_addr)) |
| 373 | ; |
| 374 | return i - node_start; |
| 375 | } |
| 376 | |
| 377 | /* |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 378 | * Sets up the system RAM area from start_pfn to end_pfn according to the |
| 379 | * numa=fake command-line option. |
| 380 | */ |
| 381 | static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn) |
| 382 | { |
| 383 | struct bootnode nodes[MAX_NUMNODES]; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 384 | u64 size, addr = start_pfn << PAGE_SHIFT; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 385 | u64 max_addr = end_pfn << PAGE_SHIFT; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 386 | int num_nodes = 0, num = 0, coeff_flag, coeff = -1, i; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 387 | |
| 388 | memset(&nodes, 0, sizeof(nodes)); |
| 389 | /* |
| 390 | * If the numa=fake command-line is just a single number N, split the |
| 391 | * system RAM into N fake nodes. |
| 392 | */ |
| 393 | if (!strchr(cmdline, '*') && !strchr(cmdline, ',')) { |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 394 | long n = simple_strtol(cmdline, NULL, 0); |
| 395 | |
| 396 | num_nodes = split_nodes_equally(nodes, &addr, max_addr, 0, n); |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 397 | if (num_nodes < 0) |
| 398 | return num_nodes; |
| 399 | goto out; |
| 400 | } |
| 401 | |
| 402 | /* Parse the command line. */ |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 403 | for (coeff_flag = 0; ; cmdline++) { |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 404 | if (*cmdline && isdigit(*cmdline)) { |
| 405 | num = num * 10 + *cmdline - '0'; |
| 406 | continue; |
| 407 | } |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 408 | if (*cmdline == '*') { |
| 409 | if (num > 0) |
| 410 | coeff = num; |
| 411 | coeff_flag = 1; |
| 412 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 413 | if (!*cmdline || *cmdline == ',') { |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 414 | if (!coeff_flag) |
| 415 | coeff = 1; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 416 | /* |
| 417 | * Round down to the nearest FAKE_NODE_MIN_SIZE. |
| 418 | * Command-line coefficients are in megabytes. |
| 419 | */ |
| 420 | size = ((u64)num << 20) & FAKE_NODE_MIN_HASH_MASK; |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 421 | if (size) |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 422 | for (i = 0; i < coeff; i++, num_nodes++) |
| 423 | if (setup_node_range(num_nodes, nodes, |
| 424 | &addr, size, max_addr) < 0) |
| 425 | goto done; |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 426 | if (!*cmdline) |
| 427 | break; |
| 428 | coeff_flag = 0; |
| 429 | coeff = -1; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 430 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 431 | num = 0; |
| 432 | } |
| 433 | done: |
| 434 | if (!num_nodes) |
| 435 | return -1; |
David Rientjes | 14694d7 | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 436 | /* Fill remainder of system RAM, if appropriate. */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 437 | if (addr < max_addr) { |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 438 | if (coeff_flag && coeff < 0) { |
| 439 | /* Split remaining nodes into num-sized chunks */ |
| 440 | num_nodes += split_nodes_by_size(nodes, &addr, max_addr, |
| 441 | num_nodes, num); |
| 442 | goto out; |
| 443 | } |
David Rientjes | 14694d7 | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 444 | switch (*(cmdline - 1)) { |
| 445 | case '*': |
| 446 | /* Split remaining nodes into coeff chunks */ |
| 447 | if (coeff <= 0) |
| 448 | break; |
| 449 | num_nodes += split_nodes_equally(nodes, &addr, max_addr, |
| 450 | num_nodes, coeff); |
| 451 | break; |
| 452 | case ',': |
| 453 | /* Do not allocate remaining system RAM */ |
| 454 | break; |
| 455 | default: |
| 456 | /* Give one final node */ |
| 457 | setup_node_range(num_nodes, nodes, &addr, |
| 458 | max_addr - addr, max_addr); |
| 459 | num_nodes++; |
| 460 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 461 | } |
| 462 | out: |
| 463 | memnode_shift = compute_hash_shift(nodes, num_nodes); |
| 464 | if (memnode_shift < 0) { |
| 465 | memnode_shift = 0; |
| 466 | printk(KERN_ERR "No NUMA hash function found. NUMA emulation " |
| 467 | "disabled.\n"); |
| 468 | return -1; |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * We need to vacate all active ranges that may have been registered by |
David Rientjes | 1c05f09 | 2007-07-21 17:11:30 +0200 | [diff] [blame] | 473 | * SRAT and set acpi_numa to -1 so that srat_disabled() always returns |
| 474 | * true. NUMA emulation has succeeded so we will not scan ACPI nodes. |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 475 | */ |
| 476 | remove_all_active_ranges(); |
David Rientjes | 1c05f09 | 2007-07-21 17:11:30 +0200 | [diff] [blame] | 477 | #ifdef CONFIG_ACPI_NUMA |
| 478 | acpi_numa = -1; |
| 479 | #endif |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 480 | for_each_node_mask(i, node_possible_map) { |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 481 | e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT, |
| 482 | nodes[i].end >> PAGE_SHIFT); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 483 | setup_node_bootmem(i, nodes[i].start, nodes[i].end); |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 484 | } |
David Rientjes | 3484d79 | 2007-07-21 17:10:32 +0200 | [diff] [blame] | 485 | acpi_fake_nodes(nodes, num_nodes); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 486 | numa_init_array(); |
| 487 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 489 | #endif /* CONFIG_NUMA_EMU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
| 491 | void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 492 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | int i; |
| 494 | |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 495 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 496 | nodes_clear(node_online_map); |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | #ifdef CONFIG_NUMA_EMU |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 499 | if (cmdline && !numa_emulation(start_pfn, end_pfn)) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 500 | return; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 501 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 502 | nodes_clear(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | #endif |
| 504 | |
| 505 | #ifdef CONFIG_ACPI_NUMA |
| 506 | if (!numa_off && !acpi_scan_nodes(start_pfn << PAGE_SHIFT, |
| 507 | end_pfn << PAGE_SHIFT)) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 508 | return; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 509 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 510 | nodes_clear(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | #endif |
| 512 | |
| 513 | #ifdef CONFIG_K8_NUMA |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 514 | if (!numa_off && !k8_scan_nodes(start_pfn<<PAGE_SHIFT, |
| 515 | end_pfn<<PAGE_SHIFT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | return; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 517 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 518 | nodes_clear(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | #endif |
| 520 | printk(KERN_INFO "%s\n", |
| 521 | numa_off ? "NUMA turned off" : "No NUMA configuration found"); |
| 522 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 523 | printk(KERN_INFO "Faking a node at %016lx-%016lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | start_pfn << PAGE_SHIFT, |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 525 | end_pfn << PAGE_SHIFT); |
| 526 | /* setup dummy node covering all memory */ |
| 527 | memnode_shift = 63; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 528 | memnodemap = memnode.embedded_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | memnodemap[0] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | node_set_online(0); |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 531 | node_set(0, node_possible_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | for (i = 0; i < NR_CPUS; i++) |
Andi Kleen | 69d81fc | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 533 | numa_set_node(i, 0); |
travis@sgi.com | df3825c | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 534 | /* cpumask_of_cpu() may not be available during early startup */ |
travis@sgi.com | 3cc87e3 | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 535 | memset(&node_to_cpumask_map[0], 0, sizeof(node_to_cpumask_map[0])); |
| 536 | cpu_set(0, node_to_cpumask_map[0]); |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 537 | e820_register_active_regions(0, start_pfn, end_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | setup_node_bootmem(0, start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT); |
| 539 | } |
| 540 | |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 541 | __cpuinit void numa_add_cpu(int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | { |
travis@sgi.com | 1ce3571 | 2008-01-30 13:33:33 +0100 | [diff] [blame] | 543 | set_bit(cpu, |
| 544 | (unsigned long *)&node_to_cpumask_map[early_cpu_to_node(cpu)]); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 545 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Andi Kleen | 69d81fc | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 547 | void __cpuinit numa_set_node(int cpu, int node) |
| 548 | { |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 549 | int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr; |
travis@sgi.com | df3825c | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 550 | |
Ravikiran G Thirumalai | df79efd | 2006-01-11 22:45:39 +0100 | [diff] [blame] | 551 | cpu_pda(cpu)->nodenumber = node; |
travis@sgi.com | df3825c | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 552 | |
| 553 | if(cpu_to_node_map) |
| 554 | cpu_to_node_map[cpu] = node; |
| 555 | else if(per_cpu_offset(cpu)) |
| 556 | per_cpu(x86_cpu_to_node_map, cpu) = node; |
| 557 | else |
| 558 | Dprintk(KERN_INFO "Setting node for non-present cpu %d\n", cpu); |
Andi Kleen | 69d81fc | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 559 | } |
| 560 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 561 | unsigned long __init numa_free_all_bootmem(void) |
| 562 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | unsigned long pages = 0; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 564 | int i; |
| 565 | |
| 566 | for_each_online_node(i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | pages += free_all_bootmem_node(NODE_DATA(i)); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | return pages; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 570 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
| 572 | void __init paging_init(void) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 573 | { |
Mel Gorman | 6391af1 | 2006-10-11 01:20:39 -0700 | [diff] [blame] | 574 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 575 | |
Mel Gorman | 6391af1 | 2006-10-11 01:20:39 -0700 | [diff] [blame] | 576 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
| 577 | max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; |
| 578 | max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; |
| 579 | max_zone_pfns[ZONE_NORMAL] = end_pfn; |
Bob Picco | d3ee871 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 580 | |
Bob Picco | f0a5a58 | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 581 | sparse_memory_present_with_active_regions(MAX_NUMNODES); |
| 582 | sparse_init(); |
Bob Picco | d3ee871 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 583 | |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 584 | free_area_init_nodes(max_zone_pfns); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 585 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 587 | static __init int numa_setup(char *opt) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 588 | { |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 589 | if (!opt) |
| 590 | return -EINVAL; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 591 | if (!strncmp(opt, "off", 3)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | numa_off = 1; |
| 593 | #ifdef CONFIG_NUMA_EMU |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 594 | if (!strncmp(opt, "fake=", 5)) |
| 595 | cmdline = opt + 5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | #endif |
| 597 | #ifdef CONFIG_ACPI_NUMA |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 598 | if (!strncmp(opt, "noacpi", 6)) |
| 599 | acpi_numa = -1; |
| 600 | if (!strncmp(opt, "hotadd=", 7)) |
Andi Kleen | 68a3a7f | 2006-04-07 19:49:18 +0200 | [diff] [blame] | 601 | hotadd_percent = simple_strtoul(opt+7, NULL, 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | #endif |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 603 | return 0; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 604 | } |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 605 | early_param("numa", numa_setup); |
| 606 | |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 607 | /* |
| 608 | * Setup early cpu_to_node. |
| 609 | * |
| 610 | * Populate cpu_to_node[] only if x86_cpu_to_apicid[], |
| 611 | * and apicid_to_node[] tables have valid entries for a CPU. |
| 612 | * This means we skip cpu_to_node[] initialisation for NUMA |
| 613 | * emulation and faking node case (when running a kernel compiled |
| 614 | * for NUMA on a non NUMA box), which is OK as cpu_to_node[] |
| 615 | * is already initialized in a round robin manner at numa_init_array, |
| 616 | * prior to this call, and this initialization is good enough |
| 617 | * for the fake NUMA cases. |
| 618 | */ |
| 619 | void __init init_cpu_to_node(void) |
| 620 | { |
| 621 | int i; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 622 | |
| 623 | for (i = 0; i < NR_CPUS; i++) { |
Yinghai Lu | 7c9e92b | 2008-02-19 15:35:54 -0800 | [diff] [blame] | 624 | int node; |
travis@sgi.com | ef97001 | 2008-01-30 13:33:10 +0100 | [diff] [blame] | 625 | u16 apicid = x86_cpu_to_apicid_init[i]; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 626 | |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 627 | if (apicid == BAD_APICID) |
| 628 | continue; |
Yinghai Lu | 7c9e92b | 2008-02-19 15:35:54 -0800 | [diff] [blame] | 629 | node = apicid_to_node[apicid]; |
| 630 | if (node == NUMA_NO_NODE) |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 631 | continue; |
Yinghai Lu | 7c9e92b | 2008-02-19 15:35:54 -0800 | [diff] [blame] | 632 | if (!node_online(node)) |
| 633 | continue; |
| 634 | numa_set_node(i, node); |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 635 | } |
| 636 | } |
| 637 | |
Andi Kleen | cf05013 | 2006-01-11 22:46:27 +0100 | [diff] [blame] | 638 | |