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 | |
Thomas Gleixner | 864fc31 | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 30 | static bootmem_data_t plat_node_bdata[MAX_NUMNODES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | s16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 35 | [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 36 | }; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | int numa_off __initdata; |
Thomas Gleixner | 864fc31 | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 39 | static unsigned long __initdata nodemap_addr; |
| 40 | static unsigned long __initdata nodemap_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 42 | /* |
| 43 | * Given a shift value, try to populate memnodemap[] |
| 44 | * Returns : |
| 45 | * 1 if OK |
| 46 | * 0 if memnodmap[] too small (of shift too small) |
| 47 | * -1 if node overlap or lost ram (shift too big) |
| 48 | */ |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 49 | static int __init populate_memnodemap(const struct bootnode *nodes, |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 50 | int numnodes, int shift, int *nodeids) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | { |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 52 | unsigned long addr, end; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 53 | int i, res = -1; |
Keith Mannthey | b684664 | 2005-07-28 21:15:38 -0700 | [diff] [blame] | 54 | |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 55 | memset(memnodemap, 0xff, sizeof(s16)*memnodemapsize); |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 56 | for (i = 0; i < numnodes; i++) { |
| 57 | addr = nodes[i].start; |
| 58 | end = nodes[i].end; |
| 59 | if (addr >= end) |
| 60 | continue; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 61 | if ((end >> shift) >= memnodemapsize) |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 62 | return 0; |
| 63 | do { |
travis@sgi.com | 4323838 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 64 | if (memnodemap[addr >> shift] != NUMA_NO_NODE) |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 65 | return -1; |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 66 | |
| 67 | if (!nodeids) |
| 68 | memnodemap[addr >> shift] = i; |
| 69 | else |
| 70 | memnodemap[addr >> shift] = nodeids[i]; |
| 71 | |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 72 | addr += (1UL << shift); |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 73 | } while (addr < end); |
| 74 | res = 1; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 75 | } |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 76 | return res; |
| 77 | } |
| 78 | |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 79 | static int __init allocate_cachealigned_memnodemap(void) |
| 80 | { |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 81 | unsigned long addr; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 82 | |
| 83 | memnodemap = memnode.embedded_map; |
travis@sgi.com | 316390b | 2008-01-30 13:33:15 +0100 | [diff] [blame] | 84 | if (memnodemapsize <= ARRAY_SIZE(memnode.embedded_map)) |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 85 | return 0; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 86 | |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 87 | addr = 0x8000; |
| 88 | nodemap_size = round_up(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES); |
Yinghai Lu | c987d12 | 2008-06-24 22:14:09 -0700 | [diff] [blame^] | 89 | nodemap_addr = find_e820_area(addr, max_pfn<<PAGE_SHIFT, |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 90 | nodemap_size, L1_CACHE_BYTES); |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 91 | if (nodemap_addr == -1UL) { |
| 92 | printk(KERN_ERR |
| 93 | "NUMA: Unable to allocate Memory to Node hash map\n"); |
| 94 | nodemap_addr = nodemap_size = 0; |
| 95 | return -1; |
| 96 | } |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 97 | memnodemap = phys_to_virt(nodemap_addr); |
Yinghai Lu | 25eff8d | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 98 | reserve_early(nodemap_addr, nodemap_addr + nodemap_size, "MEMNODEMAP"); |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 99 | |
| 100 | printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n", |
| 101 | nodemap_addr, nodemap_addr + nodemap_size); |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * The LSB of all start and end addresses in the node map is the value of the |
| 107 | * maximum possible shift. |
| 108 | */ |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 109 | static int __init extract_lsb_from_nodes(const struct bootnode *nodes, |
| 110 | int numnodes) |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 111 | { |
Amul Shah | 5441392 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 112 | int i, nodes_used = 0; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 113 | unsigned long start, end; |
| 114 | unsigned long bitfield = 0, memtop = 0; |
| 115 | |
| 116 | for (i = 0; i < numnodes; i++) { |
| 117 | start = nodes[i].start; |
| 118 | end = nodes[i].end; |
| 119 | if (start >= end) |
| 120 | continue; |
Amul Shah | 5441392 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 121 | bitfield |= start; |
| 122 | nodes_used++; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 123 | if (end > memtop) |
| 124 | memtop = end; |
| 125 | } |
Amul Shah | 5441392 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 126 | if (nodes_used <= 1) |
| 127 | i = 63; |
| 128 | else |
| 129 | i = find_first_bit(&bitfield, sizeof(unsigned long)*8); |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 130 | memnodemapsize = (memtop >> i)+1; |
| 131 | return i; |
| 132 | } |
| 133 | |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 134 | int __init compute_hash_shift(struct bootnode *nodes, int numnodes, |
| 135 | int *nodeids) |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 136 | { |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 137 | int shift; |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 138 | |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 139 | shift = extract_lsb_from_nodes(nodes, numnodes); |
| 140 | if (allocate_cachealigned_memnodemap()) |
| 141 | return -1; |
Andi Kleen | 6b050f8 | 2006-01-11 22:44:33 +0100 | [diff] [blame] | 142 | printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n", |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 143 | shift); |
| 144 | |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 145 | if (populate_memnodemap(nodes, numnodes, shift, nodeids) != 1) { |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 146 | printk(KERN_INFO "Your memory is not aligned you need to " |
| 147 | "rebuild your kernel with a bigger NODEMAPSIZE " |
| 148 | "shift=%d\n", shift); |
Eric Dumazet | 529a340 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 149 | return -1; |
| 150 | } |
Keith Mannthey | b684664 | 2005-07-28 21:15:38 -0700 | [diff] [blame] | 151 | return shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } |
| 153 | |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 154 | int early_pfn_to_nid(unsigned long pfn) |
| 155 | { |
| 156 | return phys_to_nid(pfn << PAGE_SHIFT); |
| 157 | } |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 158 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 159 | static void * __init early_node_mem(int nodeid, unsigned long start, |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 160 | unsigned long end, unsigned long size, |
| 161 | unsigned long align) |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 162 | { |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 163 | unsigned long mem = find_e820_area(start, end, size, align); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 164 | void *ptr; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 165 | |
Yinghai Lu | 9347e0b | 2008-02-01 17:49:42 +0100 | [diff] [blame] | 166 | if (mem != -1L) |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 167 | return __va(mem); |
Yinghai Lu | 9347e0b | 2008-02-01 17:49:42 +0100 | [diff] [blame] | 168 | |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 169 | ptr = __alloc_bootmem_nopanic(size, align, __pa(MAX_DMA_ADDRESS)); |
Yoann Padioleau | 83e83d5 | 2007-10-17 18:04:35 +0200 | [diff] [blame] | 170 | if (ptr == NULL) { |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 171 | printk(KERN_ERR "Cannot find %lu bytes in node %d\n", |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 172 | size, nodeid); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 173 | return NULL; |
| 174 | } |
| 175 | return ptr; |
| 176 | } |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | /* Initialize bootmem allocator for a node */ |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 179 | void __init setup_node_bootmem(int nodeid, unsigned long start, |
| 180 | unsigned long end) |
| 181 | { |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 182 | unsigned long start_pfn, last_pfn, bootmap_pages, bootmap_size; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 183 | unsigned long bootmap_start, nodedata_phys; |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 184 | void *bootmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | const int pgdat_size = round_up(sizeof(pg_data_t), PAGE_SIZE); |
Yinghai Lu | 1a27fc0 | 2008-03-18 12:52:37 -0700 | [diff] [blame] | 186 | int nid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 188 | start = round_up(start, ZONE_ALIGN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 190 | printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid, |
| 191 | start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
| 193 | start_pfn = start >> PAGE_SHIFT; |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 194 | last_pfn = end >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 196 | node_data[nodeid] = early_node_mem(nodeid, start, end, pgdat_size, |
| 197 | SMP_CACHE_BYTES); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 198 | if (node_data[nodeid] == NULL) |
| 199 | return; |
| 200 | nodedata_phys = __pa(node_data[nodeid]); |
Yinghai Lu | 6118f76 | 2008-02-04 16:47:56 +0100 | [diff] [blame] | 201 | printk(KERN_INFO " NODE_DATA [%016lx - %016lx]\n", nodedata_phys, |
| 202 | nodedata_phys + pgdat_size - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t)); |
| 205 | NODE_DATA(nodeid)->bdata = &plat_node_bdata[nodeid]; |
| 206 | NODE_DATA(nodeid)->node_start_pfn = start_pfn; |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 207 | NODE_DATA(nodeid)->node_spanned_pages = last_pfn - start_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Yinghai Lu | 1a27fc0 | 2008-03-18 12:52:37 -0700 | [diff] [blame] | 209 | /* |
| 210 | * Find a place for the bootmem map |
| 211 | * nodedata_phys could be on other nodes by alloc_bootmem, |
| 212 | * so need to sure bootmap_start not to be small, otherwise |
| 213 | * early_node_mem will get that with find_e820_area instead |
| 214 | * of alloc_bootmem, that could clash with reserved range |
| 215 | */ |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 216 | bootmap_pages = bootmem_bootmap_pages(last_pfn - start_pfn); |
Yinghai Lu | 1a27fc0 | 2008-03-18 12:52:37 -0700 | [diff] [blame] | 217 | nid = phys_to_nid(nodedata_phys); |
| 218 | if (nid == nodeid) |
| 219 | bootmap_start = round_up(nodedata_phys + pgdat_size, PAGE_SIZE); |
| 220 | else |
| 221 | bootmap_start = round_up(start, PAGE_SIZE); |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 222 | /* |
Paul Jackson | e9197bf | 2008-05-14 08:15:10 -0700 | [diff] [blame] | 223 | * SMP_CACHE_BYTES could be enough, but init_bootmem_node like |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 224 | * to use that to align to PAGE_SIZE |
| 225 | */ |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 226 | bootmap = early_node_mem(nodeid, bootmap_start, end, |
Yinghai Lu | 24a5da7 | 2008-02-01 17:49:41 +0100 | [diff] [blame] | 227 | bootmap_pages<<PAGE_SHIFT, PAGE_SIZE); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 228 | if (bootmap == NULL) { |
| 229 | if (nodedata_phys < start || nodedata_phys >= end) |
Yinghai Lu | 37bff62 | 2008-03-18 12:40:04 -0700 | [diff] [blame] | 230 | free_bootmem(nodedata_phys, pgdat_size); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 231 | node_data[nodeid] = NULL; |
| 232 | return; |
| 233 | } |
| 234 | bootmap_start = __pa(bootmap); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | bootmap_size = init_bootmem_node(NODE_DATA(nodeid), |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 237 | bootmap_start >> PAGE_SHIFT, |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 238 | start_pfn, last_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Yinghai Lu | 6118f76 | 2008-02-04 16:47:56 +0100 | [diff] [blame] | 240 | printk(KERN_INFO " bootmap [%016lx - %016lx] pages %lx\n", |
| 241 | bootmap_start, bootmap_start + bootmap_size - 1, |
| 242 | bootmap_pages); |
| 243 | |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 244 | free_bootmem_with_active_regions(nodeid, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Yinghai Lu | 1a27fc0 | 2008-03-18 12:52:37 -0700 | [diff] [blame] | 246 | /* |
| 247 | * convert early reserve to bootmem reserve earlier |
| 248 | * otherwise early_node_mem could use early reserved mem |
| 249 | * on previous node |
| 250 | */ |
| 251 | early_res_to_bootmem(start, end); |
| 252 | |
| 253 | /* |
| 254 | * in some case early_node_mem could use alloc_bootmem |
| 255 | * to get range on other node, don't reserve that again |
| 256 | */ |
| 257 | if (nid != nodeid) |
| 258 | printk(KERN_INFO " NODE_DATA(%d) on node %d\n", nodeid, nid); |
| 259 | else |
| 260 | reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, |
| 261 | pgdat_size, BOOTMEM_DEFAULT); |
| 262 | nid = phys_to_nid(bootmap_start); |
| 263 | if (nid != nodeid) |
| 264 | printk(KERN_INFO " bootmap(%d) on node %d\n", nodeid, nid); |
| 265 | else |
| 266 | reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start, |
| 267 | bootmap_pages<<PAGE_SHIFT, BOOTMEM_DEFAULT); |
| 268 | |
Andi Kleen | 68a3a7f | 2006-04-07 19:49:18 +0200 | [diff] [blame] | 269 | #ifdef CONFIG_ACPI_NUMA |
| 270 | srat_reserve_add_area(nodeid); |
| 271 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | node_set_online(nodeid); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 273 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 275 | /* |
| 276 | * There are unfortunately some poorly designed mainboards around that |
| 277 | * only connect memory to a single CPU. This breaks the 1:1 cpu->node |
| 278 | * mapping. To avoid this fill in the mapping for all possible CPUs, |
| 279 | * as the number of CPUs is not known yet. We round robin the existing |
| 280 | * nodes. |
| 281 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | void __init numa_init_array(void) |
| 283 | { |
| 284 | int rr, i; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 285 | |
Ravikiran G Thirumalai | 85cc513 | 2005-09-30 11:59:22 -0700 | [diff] [blame] | 286 | rr = first_node(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | for (i = 0; i < NR_CPUS; i++) { |
travis@sgi.com | 1ce3571 | 2008-01-30 13:33:33 +0100 | [diff] [blame] | 288 | if (early_cpu_to_node(i) != NUMA_NO_NODE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | continue; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 290 | numa_set_node(i, rr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | rr = next_node(rr, node_online_map); |
| 292 | if (rr == MAX_NUMNODES) |
| 293 | rr = first_node(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | #ifdef CONFIG_NUMA_EMU |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 298 | /* Numa emulation */ |
Thomas Gleixner | 864fc31 | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 299 | static char *cmdline __initdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 301 | /* |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 302 | * Setups up nid to range from addr to addr + size. If the end |
| 303 | * boundary is greater than max_addr, then max_addr is used instead. |
| 304 | * The return value is 0 if there is additional memory left for |
| 305 | * allocation past addr and -1 otherwise. addr is adjusted to be at |
| 306 | * the end of the node. |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 307 | */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 308 | static int __init setup_node_range(int nid, struct bootnode *nodes, u64 *addr, |
| 309 | u64 size, u64 max_addr) |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 310 | { |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 311 | int ret = 0; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 312 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 313 | nodes[nid].start = *addr; |
| 314 | *addr += size; |
| 315 | if (*addr >= max_addr) { |
| 316 | *addr = max_addr; |
| 317 | ret = -1; |
| 318 | } |
| 319 | nodes[nid].end = *addr; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 320 | node_set(nid, node_possible_map); |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 321 | printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n", nid, |
| 322 | nodes[nid].start, nodes[nid].end, |
| 323 | (nodes[nid].end - nodes[nid].start) >> 20); |
| 324 | return ret; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 325 | } |
| 326 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 327 | /* |
| 328 | * Splits num_nodes nodes up equally starting at node_start. The return value |
| 329 | * is the number of nodes split up and addr is adjusted to be at the end of the |
| 330 | * last node allocated. |
| 331 | */ |
| 332 | static int __init split_nodes_equally(struct bootnode *nodes, u64 *addr, |
| 333 | u64 max_addr, int node_start, |
| 334 | int num_nodes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | { |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 336 | unsigned int big; |
| 337 | u64 size; |
| 338 | int i; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 339 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 340 | if (num_nodes <= 0) |
| 341 | return -1; |
| 342 | if (num_nodes > MAX_NUMNODES) |
| 343 | num_nodes = MAX_NUMNODES; |
David Rientjes | a7e9662 | 2007-07-21 17:11:29 +0200 | [diff] [blame] | 344 | size = (max_addr - *addr - e820_hole_size(*addr, max_addr)) / |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 345 | num_nodes; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 346 | /* |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 347 | * Calculate the number of big nodes that can be allocated as a result |
| 348 | * of consolidating the leftovers. |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 349 | */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 350 | big = ((size & ~FAKE_NODE_MIN_HASH_MASK) * num_nodes) / |
| 351 | FAKE_NODE_MIN_SIZE; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 352 | |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 353 | /* Round down to nearest FAKE_NODE_MIN_SIZE. */ |
| 354 | size &= FAKE_NODE_MIN_HASH_MASK; |
| 355 | if (!size) { |
| 356 | printk(KERN_ERR "Not enough memory for each node. " |
| 357 | "NUMA emulation disabled.\n"); |
| 358 | return -1; |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 359 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 360 | |
| 361 | for (i = node_start; i < num_nodes + node_start; i++) { |
| 362 | u64 end = *addr + size; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 363 | |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 364 | if (i < big) |
| 365 | end += FAKE_NODE_MIN_SIZE; |
| 366 | /* |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 367 | * The final node can have the remaining system RAM. Other |
| 368 | * nodes receive roughly the same amount of available pages. |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 369 | */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 370 | if (i == num_nodes + node_start - 1) |
Rohit Seth | 53fee04 | 2007-02-13 13:26:22 +0100 | [diff] [blame] | 371 | end = max_addr; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 372 | else |
David Rientjes | a7e9662 | 2007-07-21 17:11:29 +0200 | [diff] [blame] | 373 | while (end - *addr - e820_hole_size(*addr, end) < |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 374 | size) { |
| 375 | end += FAKE_NODE_MIN_SIZE; |
| 376 | if (end > max_addr) { |
| 377 | end = max_addr; |
| 378 | break; |
| 379 | } |
| 380 | } |
| 381 | if (setup_node_range(i, nodes, addr, end - *addr, max_addr) < 0) |
| 382 | break; |
| 383 | } |
| 384 | return i - node_start + 1; |
| 385 | } |
| 386 | |
| 387 | /* |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 388 | * Splits the remaining system RAM into chunks of size. The remaining memory is |
| 389 | * always assigned to a final node and can be asymmetric. Returns the number of |
| 390 | * nodes split. |
| 391 | */ |
| 392 | static int __init split_nodes_by_size(struct bootnode *nodes, u64 *addr, |
| 393 | u64 max_addr, int node_start, u64 size) |
| 394 | { |
| 395 | int i = node_start; |
| 396 | size = (size << 20) & FAKE_NODE_MIN_HASH_MASK; |
| 397 | while (!setup_node_range(i++, nodes, addr, size, max_addr)) |
| 398 | ; |
| 399 | return i - node_start; |
| 400 | } |
| 401 | |
| 402 | /* |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 403 | * Sets up the system RAM area from start_pfn to last_pfn according to the |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 404 | * numa=fake command-line option. |
| 405 | */ |
Mike Travis | f46bdf2 | 2008-04-04 18:11:09 -0700 | [diff] [blame] | 406 | static struct bootnode nodes[MAX_NUMNODES] __initdata; |
| 407 | |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 408 | static int __init numa_emulation(unsigned long start_pfn, unsigned long last_pfn) |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 409 | { |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 410 | u64 size, addr = start_pfn << PAGE_SHIFT; |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 411 | u64 max_addr = last_pfn << PAGE_SHIFT; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 412 | int num_nodes = 0, num = 0, coeff_flag, coeff = -1, i; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 413 | |
| 414 | memset(&nodes, 0, sizeof(nodes)); |
| 415 | /* |
| 416 | * If the numa=fake command-line is just a single number N, split the |
| 417 | * system RAM into N fake nodes. |
| 418 | */ |
| 419 | if (!strchr(cmdline, '*') && !strchr(cmdline, ',')) { |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 420 | long n = simple_strtol(cmdline, NULL, 0); |
| 421 | |
| 422 | num_nodes = split_nodes_equally(nodes, &addr, max_addr, 0, n); |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 423 | if (num_nodes < 0) |
| 424 | return num_nodes; |
| 425 | goto out; |
| 426 | } |
| 427 | |
| 428 | /* Parse the command line. */ |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 429 | for (coeff_flag = 0; ; cmdline++) { |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 430 | if (*cmdline && isdigit(*cmdline)) { |
| 431 | num = num * 10 + *cmdline - '0'; |
| 432 | continue; |
| 433 | } |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 434 | if (*cmdline == '*') { |
| 435 | if (num > 0) |
| 436 | coeff = num; |
| 437 | coeff_flag = 1; |
| 438 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 439 | if (!*cmdline || *cmdline == ',') { |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 440 | if (!coeff_flag) |
| 441 | coeff = 1; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 442 | /* |
| 443 | * Round down to the nearest FAKE_NODE_MIN_SIZE. |
| 444 | * Command-line coefficients are in megabytes. |
| 445 | */ |
| 446 | size = ((u64)num << 20) & FAKE_NODE_MIN_HASH_MASK; |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 447 | if (size) |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 448 | for (i = 0; i < coeff; i++, num_nodes++) |
| 449 | if (setup_node_range(num_nodes, nodes, |
| 450 | &addr, size, max_addr) < 0) |
| 451 | goto done; |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 452 | if (!*cmdline) |
| 453 | break; |
| 454 | coeff_flag = 0; |
| 455 | coeff = -1; |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 456 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 457 | num = 0; |
| 458 | } |
| 459 | done: |
| 460 | if (!num_nodes) |
| 461 | return -1; |
David Rientjes | 14694d7 | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 462 | /* Fill remainder of system RAM, if appropriate. */ |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 463 | if (addr < max_addr) { |
David Rientjes | 382591d | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 464 | if (coeff_flag && coeff < 0) { |
| 465 | /* Split remaining nodes into num-sized chunks */ |
| 466 | num_nodes += split_nodes_by_size(nodes, &addr, max_addr, |
| 467 | num_nodes, num); |
| 468 | goto out; |
| 469 | } |
David Rientjes | 14694d7 | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 470 | switch (*(cmdline - 1)) { |
| 471 | case '*': |
| 472 | /* Split remaining nodes into coeff chunks */ |
| 473 | if (coeff <= 0) |
| 474 | break; |
| 475 | num_nodes += split_nodes_equally(nodes, &addr, max_addr, |
| 476 | num_nodes, coeff); |
| 477 | break; |
| 478 | case ',': |
| 479 | /* Do not allocate remaining system RAM */ |
| 480 | break; |
| 481 | default: |
| 482 | /* Give one final node */ |
| 483 | setup_node_range(num_nodes, nodes, &addr, |
| 484 | max_addr - addr, max_addr); |
| 485 | num_nodes++; |
| 486 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 487 | } |
| 488 | out: |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 489 | memnode_shift = compute_hash_shift(nodes, num_nodes, NULL); |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 490 | if (memnode_shift < 0) { |
| 491 | memnode_shift = 0; |
| 492 | printk(KERN_ERR "No NUMA hash function found. NUMA emulation " |
| 493 | "disabled.\n"); |
| 494 | return -1; |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * 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] | 499 | * SRAT and set acpi_numa to -1 so that srat_disabled() always returns |
| 500 | * true. NUMA emulation has succeeded so we will not scan ACPI nodes. |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 501 | */ |
| 502 | remove_all_active_ranges(); |
David Rientjes | 1c05f09 | 2007-07-21 17:11:30 +0200 | [diff] [blame] | 503 | #ifdef CONFIG_ACPI_NUMA |
| 504 | acpi_numa = -1; |
| 505 | #endif |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 506 | for_each_node_mask(i, node_possible_map) { |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 507 | e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT, |
| 508 | nodes[i].end >> PAGE_SHIFT); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 509 | setup_node_bootmem(i, nodes[i].start, nodes[i].end); |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 510 | } |
David Rientjes | 3484d79 | 2007-07-21 17:10:32 +0200 | [diff] [blame] | 511 | acpi_fake_nodes(nodes, num_nodes); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 512 | numa_init_array(); |
| 513 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 515 | #endif /* CONFIG_NUMA_EMU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Yinghai Lu | 1f75d7e | 2008-06-22 02:44:49 -0700 | [diff] [blame] | 517 | void __init initmem_init(unsigned long start_pfn, unsigned long last_pfn) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 518 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | int i; |
| 520 | |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 521 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 522 | nodes_clear(node_online_map); |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | #ifdef CONFIG_NUMA_EMU |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 525 | if (cmdline && !numa_emulation(start_pfn, last_pfn)) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 526 | return; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 527 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 528 | nodes_clear(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | #endif |
| 530 | |
| 531 | #ifdef CONFIG_ACPI_NUMA |
| 532 | if (!numa_off && !acpi_scan_nodes(start_pfn << PAGE_SHIFT, |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 533 | last_pfn << PAGE_SHIFT)) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 534 | return; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 535 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 536 | nodes_clear(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | #endif |
| 538 | |
| 539 | #ifdef CONFIG_K8_NUMA |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 540 | if (!numa_off && !k8_scan_nodes(start_pfn<<PAGE_SHIFT, |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 541 | last_pfn<<PAGE_SHIFT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | return; |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 543 | nodes_clear(node_possible_map); |
Yinghai Lu | b7ad149 | 2008-02-17 02:02:21 -0800 | [diff] [blame] | 544 | nodes_clear(node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | #endif |
| 546 | printk(KERN_INFO "%s\n", |
| 547 | numa_off ? "NUMA turned off" : "No NUMA configuration found"); |
| 548 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 549 | printk(KERN_INFO "Faking a node at %016lx-%016lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | start_pfn << PAGE_SHIFT, |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 551 | last_pfn << PAGE_SHIFT); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 552 | /* setup dummy node covering all memory */ |
| 553 | memnode_shift = 63; |
Amul Shah | 076422d2 | 2007-02-13 13:26:19 +0100 | [diff] [blame] | 554 | memnodemap = memnode.embedded_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | memnodemap[0] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | node_set_online(0); |
Suresh Siddha | e3f1cae | 2007-05-02 19:27:20 +0200 | [diff] [blame] | 557 | node_set(0, node_possible_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | for (i = 0; i < NR_CPUS; i++) |
Andi Kleen | 69d81fc | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 559 | numa_set_node(i, 0); |
Thomas Gleixner | 886533a | 2008-05-12 15:43:36 +0200 | [diff] [blame] | 560 | e820_register_active_regions(0, start_pfn, last_pfn); |
| 561 | setup_node_bootmem(0, start_pfn << PAGE_SHIFT, last_pfn << PAGE_SHIFT); |
Andi Kleen | 69d81fc | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 562 | } |
| 563 | |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 564 | unsigned long __init numa_free_all_bootmem(void) |
| 565 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | unsigned long pages = 0; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 567 | int i; |
| 568 | |
| 569 | for_each_online_node(i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | pages += free_all_bootmem_node(NODE_DATA(i)); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | return pages; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 573 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
| 575 | void __init paging_init(void) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 576 | { |
Mel Gorman | 6391af1 | 2006-10-11 01:20:39 -0700 | [diff] [blame] | 577 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 578 | |
Mel Gorman | 6391af1 | 2006-10-11 01:20:39 -0700 | [diff] [blame] | 579 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
| 580 | max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; |
| 581 | max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; |
Yinghai Lu | c987d12 | 2008-06-24 22:14:09 -0700 | [diff] [blame^] | 582 | max_zone_pfns[ZONE_NORMAL] = max_pfn; |
Bob Picco | d3ee871 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 583 | |
Bob Picco | f0a5a58 | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 584 | sparse_memory_present_with_active_regions(MAX_NUMNODES); |
| 585 | sparse_init(); |
Bob Picco | d3ee871 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 586 | |
Mel Gorman | 5cb248a | 2006-09-27 01:49:52 -0700 | [diff] [blame] | 587 | free_area_init_nodes(max_zone_pfns); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 590 | static __init int numa_setup(char *opt) |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 591 | { |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 592 | if (!opt) |
| 593 | return -EINVAL; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 594 | if (!strncmp(opt, "off", 3)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | numa_off = 1; |
| 596 | #ifdef CONFIG_NUMA_EMU |
David Rientjes | 8b8ca80e | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 597 | if (!strncmp(opt, "fake=", 5)) |
| 598 | cmdline = opt + 5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | #endif |
| 600 | #ifdef CONFIG_ACPI_NUMA |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 601 | if (!strncmp(opt, "noacpi", 6)) |
| 602 | acpi_numa = -1; |
| 603 | if (!strncmp(opt, "hotadd=", 7)) |
Andi Kleen | 68a3a7f | 2006-04-07 19:49:18 +0200 | [diff] [blame] | 604 | hotadd_percent = simple_strtoul(opt+7, NULL, 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | #endif |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 606 | return 0; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 607 | } |
Andi Kleen | 2c8c0e6 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 608 | early_param("numa", numa_setup); |
| 609 | |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 610 | #ifdef CONFIG_NUMA |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 611 | /* |
| 612 | * Setup early cpu_to_node. |
| 613 | * |
| 614 | * Populate cpu_to_node[] only if x86_cpu_to_apicid[], |
| 615 | * and apicid_to_node[] tables have valid entries for a CPU. |
| 616 | * This means we skip cpu_to_node[] initialisation for NUMA |
| 617 | * emulation and faking node case (when running a kernel compiled |
| 618 | * for NUMA on a non NUMA box), which is OK as cpu_to_node[] |
| 619 | * is already initialized in a round robin manner at numa_init_array, |
| 620 | * prior to this call, and this initialization is good enough |
| 621 | * for the fake NUMA cases. |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 622 | * |
| 623 | * Called before the per_cpu areas are setup. |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 624 | */ |
| 625 | void __init init_cpu_to_node(void) |
| 626 | { |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 627 | int cpu; |
| 628 | u16 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid); |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 629 | |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 630 | BUG_ON(cpu_to_apicid == NULL); |
| 631 | |
| 632 | for_each_possible_cpu(cpu) { |
Yinghai Lu | 7c9e92b | 2008-02-19 15:35:54 -0800 | [diff] [blame] | 633 | int node; |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 634 | u16 apicid = cpu_to_apicid[cpu]; |
Thomas Gleixner | e3cfe52 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 635 | |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 636 | if (apicid == BAD_APICID) |
| 637 | continue; |
Yinghai Lu | 7c9e92b | 2008-02-19 15:35:54 -0800 | [diff] [blame] | 638 | node = apicid_to_node[apicid]; |
| 639 | if (node == NUMA_NO_NODE) |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 640 | continue; |
Yinghai Lu | 7c9e92b | 2008-02-19 15:35:54 -0800 | [diff] [blame] | 641 | if (!node_online(node)) |
| 642 | continue; |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 643 | numa_set_node(cpu, node); |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 644 | } |
| 645 | } |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 646 | #endif |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 647 | |
Andi Kleen | cf05013 | 2006-01-11 22:46:27 +0100 | [diff] [blame] | 648 | |