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Commit | Line | Data |
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e3cfe529 | 1 | /* |
1da177e4 LT |
2 | * Generic VM initialization for x86-64 NUMA setups. |
3 | * Copyright 2002,2003 Andi Kleen, SuSE Labs. | |
e3cfe529 | 4 | */ |
1da177e4 LT |
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> | |
72d7c3b3 | 10 | #include <linux/memblock.h> |
1da177e4 LT |
11 | #include <linux/mmzone.h> |
12 | #include <linux/ctype.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/nodemask.h> | |
3cc87e3f | 15 | #include <linux/sched.h> |
1da177e4 LT |
16 | |
17 | #include <asm/e820.h> | |
18 | #include <asm/proto.h> | |
19 | #include <asm/dma.h> | |
20 | #include <asm/numa.h> | |
21 | #include <asm/acpi.h> | |
23ac4ae8 | 22 | #include <asm/amd_nb.h> |
1da177e4 | 23 | |
6c231b7b | 24 | struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; |
e3cfe529 TG |
25 | EXPORT_SYMBOL(node_data); |
26 | ||
dcf36bfa | 27 | struct memnode memnode; |
1da177e4 | 28 | |
43238382 | 29 | s16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { |
e3cfe529 | 30 | [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE |
3f098c26 | 31 | }; |
e3cfe529 | 32 | |
1da177e4 | 33 | int numa_off __initdata; |
864fc31e TG |
34 | static unsigned long __initdata nodemap_addr; |
35 | static unsigned long __initdata nodemap_size; | |
1da177e4 | 36 | |
6470aff6 BG |
37 | /* |
38 | * Map cpu index to node index | |
39 | */ | |
40 | DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE); | |
41 | EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map); | |
42 | ||
529a3404 ED |
43 | /* |
44 | * Given a shift value, try to populate memnodemap[] | |
45 | * Returns : | |
46 | * 1 if OK | |
47 | * 0 if memnodmap[] too small (of shift too small) | |
48 | * -1 if node overlap or lost ram (shift too big) | |
49 | */ | |
e3cfe529 | 50 | static int __init populate_memnodemap(const struct bootnode *nodes, |
6ec6e0d9 | 51 | int numnodes, int shift, int *nodeids) |
1da177e4 | 52 | { |
529a3404 | 53 | unsigned long addr, end; |
e3cfe529 | 54 | int i, res = -1; |
b684664f | 55 | |
43238382 | 56 | memset(memnodemap, 0xff, sizeof(s16)*memnodemapsize); |
b684664f | 57 | for (i = 0; i < numnodes; i++) { |
529a3404 ED |
58 | addr = nodes[i].start; |
59 | end = nodes[i].end; | |
60 | if (addr >= end) | |
b684664f | 61 | continue; |
076422d2 | 62 | if ((end >> shift) >= memnodemapsize) |
529a3404 ED |
63 | return 0; |
64 | do { | |
43238382 | 65 | if (memnodemap[addr >> shift] != NUMA_NO_NODE) |
b684664f | 66 | return -1; |
6ec6e0d9 SS |
67 | |
68 | if (!nodeids) | |
69 | memnodemap[addr >> shift] = i; | |
70 | else | |
71 | memnodemap[addr >> shift] = nodeids[i]; | |
72 | ||
076422d2 | 73 | addr += (1UL << shift); |
529a3404 ED |
74 | } while (addr < end); |
75 | res = 1; | |
e3cfe529 | 76 | } |
529a3404 ED |
77 | return res; |
78 | } | |
79 | ||
076422d2 AS |
80 | static int __init allocate_cachealigned_memnodemap(void) |
81 | { | |
24a5da73 | 82 | unsigned long addr; |
076422d2 AS |
83 | |
84 | memnodemap = memnode.embedded_map; | |
316390b0 | 85 | if (memnodemapsize <= ARRAY_SIZE(memnode.embedded_map)) |
076422d2 | 86 | return 0; |
076422d2 | 87 | |
24a5da73 | 88 | addr = 0x8000; |
be3e89ee | 89 | nodemap_size = roundup(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES); |
a9ce6bc1 | 90 | nodemap_addr = memblock_find_in_range(addr, max_pfn<<PAGE_SHIFT, |
24a5da73 | 91 | nodemap_size, L1_CACHE_BYTES); |
a9ce6bc1 | 92 | if (nodemap_addr == MEMBLOCK_ERROR) { |
076422d2 AS |
93 | printk(KERN_ERR |
94 | "NUMA: Unable to allocate Memory to Node hash map\n"); | |
95 | nodemap_addr = nodemap_size = 0; | |
96 | return -1; | |
97 | } | |
24a5da73 | 98 | memnodemap = phys_to_virt(nodemap_addr); |
a9ce6bc1 | 99 | memblock_x86_reserve_range(nodemap_addr, nodemap_addr + nodemap_size, "MEMNODEMAP"); |
076422d2 AS |
100 | |
101 | printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n", | |
102 | nodemap_addr, nodemap_addr + nodemap_size); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | /* | |
107 | * The LSB of all start and end addresses in the node map is the value of the | |
108 | * maximum possible shift. | |
109 | */ | |
e3cfe529 TG |
110 | static int __init extract_lsb_from_nodes(const struct bootnode *nodes, |
111 | int numnodes) | |
529a3404 | 112 | { |
54413927 | 113 | int i, nodes_used = 0; |
076422d2 AS |
114 | unsigned long start, end; |
115 | unsigned long bitfield = 0, memtop = 0; | |
116 | ||
117 | for (i = 0; i < numnodes; i++) { | |
118 | start = nodes[i].start; | |
119 | end = nodes[i].end; | |
120 | if (start >= end) | |
121 | continue; | |
54413927 AS |
122 | bitfield |= start; |
123 | nodes_used++; | |
076422d2 AS |
124 | if (end > memtop) |
125 | memtop = end; | |
126 | } | |
54413927 AS |
127 | if (nodes_used <= 1) |
128 | i = 63; | |
129 | else | |
130 | i = find_first_bit(&bitfield, sizeof(unsigned long)*8); | |
076422d2 AS |
131 | memnodemapsize = (memtop >> i)+1; |
132 | return i; | |
133 | } | |
529a3404 | 134 | |
6ec6e0d9 SS |
135 | int __init compute_hash_shift(struct bootnode *nodes, int numnodes, |
136 | int *nodeids) | |
076422d2 AS |
137 | { |
138 | int shift; | |
529a3404 | 139 | |
076422d2 AS |
140 | shift = extract_lsb_from_nodes(nodes, numnodes); |
141 | if (allocate_cachealigned_memnodemap()) | |
142 | return -1; | |
6b050f80 | 143 | printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n", |
529a3404 ED |
144 | shift); |
145 | ||
6ec6e0d9 | 146 | if (populate_memnodemap(nodes, numnodes, shift, nodeids) != 1) { |
e3cfe529 TG |
147 | printk(KERN_INFO "Your memory is not aligned you need to " |
148 | "rebuild your kernel with a bigger NODEMAPSIZE " | |
149 | "shift=%d\n", shift); | |
529a3404 ED |
150 | return -1; |
151 | } | |
b684664f | 152 | return shift; |
1da177e4 LT |
153 | } |
154 | ||
f2dbcfa7 | 155 | int __meminit __early_pfn_to_nid(unsigned long pfn) |
bbfceef4 MT |
156 | { |
157 | return phys_to_nid(pfn << PAGE_SHIFT); | |
158 | } | |
bbfceef4 | 159 | |
e3cfe529 | 160 | static void * __init early_node_mem(int nodeid, unsigned long start, |
24a5da73 YL |
161 | unsigned long end, unsigned long size, |
162 | unsigned long align) | |
a8062231 | 163 | { |
cef625ee | 164 | unsigned long mem; |
e3cfe529 | 165 | |
cef625ee YL |
166 | /* |
167 | * put it on high as possible | |
168 | * something will go with NODE_DATA | |
169 | */ | |
170 | if (start < (MAX_DMA_PFN<<PAGE_SHIFT)) | |
171 | start = MAX_DMA_PFN<<PAGE_SHIFT; | |
172 | if (start < (MAX_DMA32_PFN<<PAGE_SHIFT) && | |
173 | end > (MAX_DMA32_PFN<<PAGE_SHIFT)) | |
174 | start = MAX_DMA32_PFN<<PAGE_SHIFT; | |
72d7c3b3 YL |
175 | mem = memblock_x86_find_in_range_node(nodeid, start, end, size, align); |
176 | if (mem != MEMBLOCK_ERROR) | |
a8062231 | 177 | return __va(mem); |
9347e0b0 | 178 | |
cef625ee YL |
179 | /* extend the search scope */ |
180 | end = max_pfn_mapped << PAGE_SHIFT; | |
419db274 YL |
181 | start = MAX_DMA_PFN << PAGE_SHIFT; |
182 | mem = memblock_find_in_range(start, end, size, align); | |
72d7c3b3 | 183 | if (mem != MEMBLOCK_ERROR) |
a8062231 | 184 | return __va(mem); |
9347e0b0 | 185 | |
1842f90c | 186 | printk(KERN_ERR "Cannot find %lu bytes in node %d\n", |
e3cfe529 | 187 | size, nodeid); |
1842f90c YL |
188 | |
189 | return NULL; | |
a8062231 AK |
190 | } |
191 | ||
1da177e4 | 192 | /* Initialize bootmem allocator for a node */ |
7c43769a YL |
193 | void __init |
194 | setup_node_bootmem(int nodeid, unsigned long start, unsigned long end) | |
e3cfe529 | 195 | { |
08677214 | 196 | unsigned long start_pfn, last_pfn, nodedata_phys; |
7c43769a | 197 | const int pgdat_size = roundup(sizeof(pg_data_t), PAGE_SIZE); |
1a27fc0a | 198 | int nid; |
1da177e4 | 199 | |
4c31e92b YL |
200 | if (!end) |
201 | return; | |
202 | ||
7c43769a YL |
203 | /* |
204 | * Don't confuse VM with a node that doesn't have the | |
205 | * minimum amount of memory: | |
206 | */ | |
207 | if (end && (end - start) < NODE_MIN_SIZE) | |
208 | return; | |
209 | ||
be3e89ee | 210 | start = roundup(start, ZONE_ALIGN); |
1da177e4 | 211 | |
08677214 | 212 | printk(KERN_INFO "Initmem setup node %d %016lx-%016lx\n", nodeid, |
e3cfe529 | 213 | start, end); |
1da177e4 LT |
214 | |
215 | start_pfn = start >> PAGE_SHIFT; | |
886533a3 | 216 | last_pfn = end >> PAGE_SHIFT; |
1da177e4 | 217 | |
24a5da73 YL |
218 | node_data[nodeid] = early_node_mem(nodeid, start, end, pgdat_size, |
219 | SMP_CACHE_BYTES); | |
a8062231 AK |
220 | if (node_data[nodeid] == NULL) |
221 | return; | |
222 | nodedata_phys = __pa(node_data[nodeid]); | |
a9ce6bc1 | 223 | memblock_x86_reserve_range(nodedata_phys, nodedata_phys + pgdat_size, "NODE_DATA"); |
6118f76f YL |
224 | printk(KERN_INFO " NODE_DATA [%016lx - %016lx]\n", nodedata_phys, |
225 | nodedata_phys + pgdat_size - 1); | |
1842f90c YL |
226 | nid = phys_to_nid(nodedata_phys); |
227 | if (nid != nodeid) | |
228 | printk(KERN_INFO " NODE_DATA(%d) on node %d\n", nodeid, nid); | |
1da177e4 | 229 | |
1da177e4 | 230 | memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t)); |
08677214 | 231 | NODE_DATA(nodeid)->node_id = nodeid; |
1da177e4 | 232 | NODE_DATA(nodeid)->node_start_pfn = start_pfn; |
886533a3 | 233 | NODE_DATA(nodeid)->node_spanned_pages = last_pfn - start_pfn; |
1da177e4 | 234 | |
1da177e4 | 235 | node_set_online(nodeid); |
e3cfe529 | 236 | } |
1da177e4 | 237 | |
e3cfe529 TG |
238 | /* |
239 | * There are unfortunately some poorly designed mainboards around that | |
240 | * only connect memory to a single CPU. This breaks the 1:1 cpu->node | |
241 | * mapping. To avoid this fill in the mapping for all possible CPUs, | |
242 | * as the number of CPUs is not known yet. We round robin the existing | |
243 | * nodes. | |
244 | */ | |
1da177e4 LT |
245 | void __init numa_init_array(void) |
246 | { | |
247 | int rr, i; | |
e3cfe529 | 248 | |
85cc5135 | 249 | rr = first_node(node_online_map); |
168ef543 | 250 | for (i = 0; i < nr_cpu_ids; i++) { |
1ce35712 | 251 | if (early_cpu_to_node(i) != NUMA_NO_NODE) |
1da177e4 | 252 | continue; |
e3cfe529 | 253 | numa_set_node(i, rr); |
1da177e4 LT |
254 | rr = next_node(rr, node_online_map); |
255 | if (rr == MAX_NUMNODES) | |
256 | rr = first_node(node_online_map); | |
1da177e4 | 257 | } |
1da177e4 LT |
258 | } |
259 | ||
260 | #ifdef CONFIG_NUMA_EMU | |
53fee04f | 261 | /* Numa emulation */ |
adc19389 DR |
262 | static struct bootnode nodes[MAX_NUMNODES] __initdata; |
263 | static struct bootnode physnodes[MAX_NUMNODES] __initdata; | |
864fc31e | 264 | static char *cmdline __initdata; |
1da177e4 | 265 | |
adc19389 DR |
266 | static int __init setup_physnodes(unsigned long start, unsigned long end, |
267 | int acpi, int k8) | |
268 | { | |
269 | int nr_nodes = 0; | |
270 | int ret = 0; | |
271 | int i; | |
272 | ||
273 | #ifdef CONFIG_ACPI_NUMA | |
274 | if (acpi) | |
275 | nr_nodes = acpi_get_nodes(physnodes); | |
276 | #endif | |
277 | #ifdef CONFIG_K8_NUMA | |
278 | if (k8) | |
279 | nr_nodes = k8_get_nodes(physnodes); | |
280 | #endif | |
281 | /* | |
282 | * Basic sanity checking on the physical node map: there may be errors | |
283 | * if the SRAT or K8 incorrectly reported the topology or the mem= | |
284 | * kernel parameter is used. | |
285 | */ | |
286 | for (i = 0; i < nr_nodes; i++) { | |
287 | if (physnodes[i].start == physnodes[i].end) | |
288 | continue; | |
289 | if (physnodes[i].start > end) { | |
290 | physnodes[i].end = physnodes[i].start; | |
291 | continue; | |
292 | } | |
293 | if (physnodes[i].end < start) { | |
294 | physnodes[i].start = physnodes[i].end; | |
295 | continue; | |
296 | } | |
297 | if (physnodes[i].start < start) | |
298 | physnodes[i].start = start; | |
299 | if (physnodes[i].end > end) | |
300 | physnodes[i].end = end; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Remove all nodes that have no memory or were truncated because of the | |
305 | * limited address range. | |
306 | */ | |
307 | for (i = 0; i < nr_nodes; i++) { | |
308 | if (physnodes[i].start == physnodes[i].end) | |
309 | continue; | |
310 | physnodes[ret].start = physnodes[i].start; | |
311 | physnodes[ret].end = physnodes[i].end; | |
312 | ret++; | |
313 | } | |
314 | ||
315 | /* | |
316 | * If no physical topology was detected, a single node is faked to cover | |
317 | * the entire address space. | |
318 | */ | |
319 | if (!ret) { | |
320 | physnodes[ret].start = start; | |
321 | physnodes[ret].end = end; | |
322 | ret = 1; | |
323 | } | |
324 | return ret; | |
325 | } | |
326 | ||
53fee04f | 327 | /* |
e3cfe529 TG |
328 | * Setups up nid to range from addr to addr + size. If the end |
329 | * boundary is greater than max_addr, then max_addr is used instead. | |
330 | * The return value is 0 if there is additional memory left for | |
331 | * allocation past addr and -1 otherwise. addr is adjusted to be at | |
332 | * the end of the node. | |
53fee04f | 333 | */ |
adc19389 | 334 | static int __init setup_node_range(int nid, u64 *addr, u64 size, u64 max_addr) |
53fee04f | 335 | { |
8b8ca80e DR |
336 | int ret = 0; |
337 | nodes[nid].start = *addr; | |
338 | *addr += size; | |
339 | if (*addr >= max_addr) { | |
340 | *addr = max_addr; | |
341 | ret = -1; | |
342 | } | |
343 | nodes[nid].end = *addr; | |
e3f1caee | 344 | node_set(nid, node_possible_map); |
8b8ca80e DR |
345 | printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n", nid, |
346 | nodes[nid].start, nodes[nid].end, | |
347 | (nodes[nid].end - nodes[nid].start) >> 20); | |
348 | return ret; | |
53fee04f RS |
349 | } |
350 | ||
adc19389 DR |
351 | /* |
352 | * Sets up nr_nodes fake nodes interleaved over physical nodes ranging from addr | |
353 | * to max_addr. The return value is the number of nodes allocated. | |
354 | */ | |
355 | static int __init split_nodes_interleave(u64 addr, u64 max_addr, | |
356 | int nr_phys_nodes, int nr_nodes) | |
357 | { | |
358 | nodemask_t physnode_mask = NODE_MASK_NONE; | |
359 | u64 size; | |
360 | int big; | |
361 | int ret = 0; | |
362 | int i; | |
363 | ||
364 | if (nr_nodes <= 0) | |
365 | return -1; | |
366 | if (nr_nodes > MAX_NUMNODES) { | |
367 | pr_info("numa=fake=%d too large, reducing to %d\n", | |
368 | nr_nodes, MAX_NUMNODES); | |
369 | nr_nodes = MAX_NUMNODES; | |
370 | } | |
371 | ||
a9ce6bc1 | 372 | size = (max_addr - addr - memblock_x86_hole_size(addr, max_addr)) / nr_nodes; |
adc19389 DR |
373 | /* |
374 | * Calculate the number of big nodes that can be allocated as a result | |
375 | * of consolidating the remainder. | |
376 | */ | |
68fd111e | 377 | big = ((size & ~FAKE_NODE_MIN_HASH_MASK) * nr_nodes) / |
adc19389 DR |
378 | FAKE_NODE_MIN_SIZE; |
379 | ||
380 | size &= FAKE_NODE_MIN_HASH_MASK; | |
381 | if (!size) { | |
382 | pr_err("Not enough memory for each node. " | |
383 | "NUMA emulation disabled.\n"); | |
384 | return -1; | |
385 | } | |
386 | ||
387 | for (i = 0; i < nr_phys_nodes; i++) | |
388 | if (physnodes[i].start != physnodes[i].end) | |
389 | node_set(i, physnode_mask); | |
390 | ||
391 | /* | |
392 | * Continue to fill physical nodes with fake nodes until there is no | |
393 | * memory left on any of them. | |
394 | */ | |
395 | while (nodes_weight(physnode_mask)) { | |
396 | for_each_node_mask(i, physnode_mask) { | |
397 | u64 end = physnodes[i].start + size; | |
398 | u64 dma32_end = PFN_PHYS(MAX_DMA32_PFN); | |
399 | ||
400 | if (ret < big) | |
401 | end += FAKE_NODE_MIN_SIZE; | |
402 | ||
403 | /* | |
404 | * Continue to add memory to this fake node if its | |
405 | * non-reserved memory is less than the per-node size. | |
406 | */ | |
407 | while (end - physnodes[i].start - | |
a9ce6bc1 | 408 | memblock_x86_hole_size(physnodes[i].start, end) < size) { |
adc19389 DR |
409 | end += FAKE_NODE_MIN_SIZE; |
410 | if (end > physnodes[i].end) { | |
411 | end = physnodes[i].end; | |
412 | break; | |
413 | } | |
414 | } | |
415 | ||
416 | /* | |
417 | * If there won't be at least FAKE_NODE_MIN_SIZE of | |
418 | * non-reserved memory in ZONE_DMA32 for the next node, | |
419 | * this one must extend to the boundary. | |
420 | */ | |
421 | if (end < dma32_end && dma32_end - end - | |
a9ce6bc1 | 422 | memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE) |
adc19389 DR |
423 | end = dma32_end; |
424 | ||
425 | /* | |
426 | * If there won't be enough non-reserved memory for the | |
427 | * next node, this one must extend to the end of the | |
428 | * physical node. | |
429 | */ | |
430 | if (physnodes[i].end - end - | |
a9ce6bc1 | 431 | memblock_x86_hole_size(end, physnodes[i].end) < size) |
adc19389 DR |
432 | end = physnodes[i].end; |
433 | ||
434 | /* | |
435 | * Avoid allocating more nodes than requested, which can | |
436 | * happen as a result of rounding down each node's size | |
437 | * to FAKE_NODE_MIN_SIZE. | |
438 | */ | |
439 | if (nodes_weight(physnode_mask) + ret >= nr_nodes) | |
440 | end = physnodes[i].end; | |
441 | ||
442 | if (setup_node_range(ret++, &physnodes[i].start, | |
443 | end - physnodes[i].start, | |
444 | physnodes[i].end) < 0) | |
445 | node_clear(i, physnode_mask); | |
446 | } | |
447 | } | |
448 | return ret; | |
449 | } | |
450 | ||
8df5bb34 DR |
451 | /* |
452 | * Returns the end address of a node so that there is at least `size' amount of | |
453 | * non-reserved memory or `max_addr' is reached. | |
454 | */ | |
455 | static u64 __init find_end_of_node(u64 start, u64 max_addr, u64 size) | |
456 | { | |
457 | u64 end = start + size; | |
458 | ||
a9ce6bc1 | 459 | while (end - start - memblock_x86_hole_size(start, end) < size) { |
8df5bb34 DR |
460 | end += FAKE_NODE_MIN_SIZE; |
461 | if (end > max_addr) { | |
462 | end = max_addr; | |
463 | break; | |
464 | } | |
465 | } | |
466 | return end; | |
467 | } | |
468 | ||
469 | /* | |
470 | * Sets up fake nodes of `size' interleaved over physical nodes ranging from | |
471 | * `addr' to `max_addr'. The return value is the number of nodes allocated. | |
472 | */ | |
473 | static int __init split_nodes_size_interleave(u64 addr, u64 max_addr, u64 size) | |
474 | { | |
475 | nodemask_t physnode_mask = NODE_MASK_NONE; | |
476 | u64 min_size; | |
477 | int ret = 0; | |
478 | int i; | |
479 | ||
480 | if (!size) | |
481 | return -1; | |
482 | /* | |
483 | * The limit on emulated nodes is MAX_NUMNODES, so the size per node is | |
484 | * increased accordingly if the requested size is too small. This | |
485 | * creates a uniform distribution of node sizes across the entire | |
486 | * machine (but not necessarily over physical nodes). | |
487 | */ | |
a9ce6bc1 | 488 | min_size = (max_addr - addr - memblock_x86_hole_size(addr, max_addr)) / |
8df5bb34 DR |
489 | MAX_NUMNODES; |
490 | min_size = max(min_size, FAKE_NODE_MIN_SIZE); | |
491 | if ((min_size & FAKE_NODE_MIN_HASH_MASK) < min_size) | |
492 | min_size = (min_size + FAKE_NODE_MIN_SIZE) & | |
493 | FAKE_NODE_MIN_HASH_MASK; | |
494 | if (size < min_size) { | |
495 | pr_err("Fake node size %LuMB too small, increasing to %LuMB\n", | |
496 | size >> 20, min_size >> 20); | |
497 | size = min_size; | |
498 | } | |
499 | size &= FAKE_NODE_MIN_HASH_MASK; | |
500 | ||
501 | for (i = 0; i < MAX_NUMNODES; i++) | |
502 | if (physnodes[i].start != physnodes[i].end) | |
503 | node_set(i, physnode_mask); | |
504 | /* | |
505 | * Fill physical nodes with fake nodes of size until there is no memory | |
506 | * left on any of them. | |
507 | */ | |
508 | while (nodes_weight(physnode_mask)) { | |
509 | for_each_node_mask(i, physnode_mask) { | |
510 | u64 dma32_end = MAX_DMA32_PFN << PAGE_SHIFT; | |
511 | u64 end; | |
512 | ||
513 | end = find_end_of_node(physnodes[i].start, | |
514 | physnodes[i].end, size); | |
515 | /* | |
516 | * If there won't be at least FAKE_NODE_MIN_SIZE of | |
517 | * non-reserved memory in ZONE_DMA32 for the next node, | |
518 | * this one must extend to the boundary. | |
519 | */ | |
520 | if (end < dma32_end && dma32_end - end - | |
a9ce6bc1 | 521 | memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE) |
8df5bb34 DR |
522 | end = dma32_end; |
523 | ||
524 | /* | |
525 | * If there won't be enough non-reserved memory for the | |
526 | * next node, this one must extend to the end of the | |
527 | * physical node. | |
528 | */ | |
529 | if (physnodes[i].end - end - | |
a9ce6bc1 | 530 | memblock_x86_hole_size(end, physnodes[i].end) < size) |
8df5bb34 DR |
531 | end = physnodes[i].end; |
532 | ||
533 | /* | |
534 | * Setup the fake node that will be allocated as bootmem | |
535 | * later. If setup_node_range() returns non-zero, there | |
536 | * is no more memory available on this physical node. | |
537 | */ | |
538 | if (setup_node_range(ret++, &physnodes[i].start, | |
539 | end - physnodes[i].start, | |
540 | physnodes[i].end) < 0) | |
541 | node_clear(i, physnode_mask); | |
542 | } | |
543 | } | |
544 | return ret; | |
545 | } | |
546 | ||
8b8ca80e | 547 | /* |
886533a3 | 548 | * Sets up the system RAM area from start_pfn to last_pfn according to the |
8b8ca80e DR |
549 | * numa=fake command-line option. |
550 | */ | |
adc19389 DR |
551 | static int __init numa_emulation(unsigned long start_pfn, |
552 | unsigned long last_pfn, int acpi, int k8) | |
8b8ca80e | 553 | { |
ca2107c9 | 554 | u64 addr = start_pfn << PAGE_SHIFT; |
886533a3 | 555 | u64 max_addr = last_pfn << PAGE_SHIFT; |
adc19389 | 556 | int num_phys_nodes; |
ca2107c9 DR |
557 | int num_nodes; |
558 | int i; | |
8b8ca80e | 559 | |
adc19389 | 560 | num_phys_nodes = setup_physnodes(addr, max_addr, acpi, k8); |
8df5bb34 DR |
561 | /* |
562 | * If the numa=fake command-line contains a 'M' or 'G', it represents | |
ca2107c9 DR |
563 | * the fixed node size. Otherwise, if it is just a single number N, |
564 | * split the system RAM into N fake nodes. | |
8df5bb34 DR |
565 | */ |
566 | if (strchr(cmdline, 'M') || strchr(cmdline, 'G')) { | |
ca2107c9 DR |
567 | u64 size; |
568 | ||
8df5bb34 DR |
569 | size = memparse(cmdline, &cmdline); |
570 | num_nodes = split_nodes_size_interleave(addr, max_addr, size); | |
ca2107c9 DR |
571 | } else { |
572 | unsigned long n; | |
8df5bb34 | 573 | |
ca2107c9 DR |
574 | n = simple_strtoul(cmdline, NULL, 0); |
575 | num_nodes = split_nodes_interleave(addr, max_addr, num_phys_nodes, n); | |
8b8ca80e DR |
576 | } |
577 | ||
ca2107c9 DR |
578 | if (num_nodes < 0) |
579 | return num_nodes; | |
6ec6e0d9 | 580 | memnode_shift = compute_hash_shift(nodes, num_nodes, NULL); |
8b8ca80e DR |
581 | if (memnode_shift < 0) { |
582 | memnode_shift = 0; | |
583 | printk(KERN_ERR "No NUMA hash function found. NUMA emulation " | |
584 | "disabled.\n"); | |
585 | return -1; | |
586 | } | |
587 | ||
588 | /* | |
adc19389 DR |
589 | * We need to vacate all active ranges that may have been registered for |
590 | * the e820 memory map. | |
8b8ca80e DR |
591 | */ |
592 | remove_all_active_ranges(); | |
e3f1caee | 593 | for_each_node_mask(i, node_possible_map) { |
a9ce6bc1 | 594 | memblock_x86_register_active_regions(i, nodes[i].start >> PAGE_SHIFT, |
5cb248ab | 595 | nodes[i].end >> PAGE_SHIFT); |
e3cfe529 | 596 | setup_node_bootmem(i, nodes[i].start, nodes[i].end); |
5cb248ab | 597 | } |
3484d798 | 598 | acpi_fake_nodes(nodes, num_nodes); |
e3cfe529 TG |
599 | numa_init_array(); |
600 | return 0; | |
1da177e4 | 601 | } |
8b8ca80e | 602 | #endif /* CONFIG_NUMA_EMU */ |
1da177e4 | 603 | |
8ee2debc DR |
604 | void __init initmem_init(unsigned long start_pfn, unsigned long last_pfn, |
605 | int acpi, int k8) | |
e3cfe529 | 606 | { |
1da177e4 LT |
607 | int i; |
608 | ||
e3f1caee | 609 | nodes_clear(node_possible_map); |
b7ad149d | 610 | nodes_clear(node_online_map); |
e3f1caee | 611 | |
1da177e4 | 612 | #ifdef CONFIG_NUMA_EMU |
adc19389 | 613 | if (cmdline && !numa_emulation(start_pfn, last_pfn, acpi, k8)) |
e3cfe529 | 614 | return; |
e3f1caee | 615 | nodes_clear(node_possible_map); |
b7ad149d | 616 | nodes_clear(node_online_map); |
1da177e4 LT |
617 | #endif |
618 | ||
619 | #ifdef CONFIG_ACPI_NUMA | |
8716273c DR |
620 | if (!numa_off && acpi && !acpi_scan_nodes(start_pfn << PAGE_SHIFT, |
621 | last_pfn << PAGE_SHIFT)) | |
e3cfe529 | 622 | return; |
e3f1caee | 623 | nodes_clear(node_possible_map); |
b7ad149d | 624 | nodes_clear(node_online_map); |
1da177e4 LT |
625 | #endif |
626 | ||
627 | #ifdef CONFIG_K8_NUMA | |
8ee2debc | 628 | if (!numa_off && k8 && !k8_scan_nodes()) |
1da177e4 | 629 | return; |
e3f1caee | 630 | nodes_clear(node_possible_map); |
b7ad149d | 631 | nodes_clear(node_online_map); |
1da177e4 LT |
632 | #endif |
633 | printk(KERN_INFO "%s\n", | |
634 | numa_off ? "NUMA turned off" : "No NUMA configuration found"); | |
635 | ||
e3cfe529 | 636 | printk(KERN_INFO "Faking a node at %016lx-%016lx\n", |
1da177e4 | 637 | start_pfn << PAGE_SHIFT, |
886533a3 | 638 | last_pfn << PAGE_SHIFT); |
e3cfe529 TG |
639 | /* setup dummy node covering all memory */ |
640 | memnode_shift = 63; | |
076422d2 | 641 | memnodemap = memnode.embedded_map; |
1da177e4 | 642 | memnodemap[0] = 0; |
1da177e4 | 643 | node_set_online(0); |
e3f1caee | 644 | node_set(0, node_possible_map); |
168ef543 | 645 | for (i = 0; i < nr_cpu_ids; i++) |
69d81fcd | 646 | numa_set_node(i, 0); |
a9ce6bc1 | 647 | memblock_x86_register_active_regions(0, start_pfn, last_pfn); |
886533a3 | 648 | setup_node_bootmem(0, start_pfn << PAGE_SHIFT, last_pfn << PAGE_SHIFT); |
69d81fcd AK |
649 | } |
650 | ||
e3cfe529 TG |
651 | unsigned long __init numa_free_all_bootmem(void) |
652 | { | |
1da177e4 | 653 | unsigned long pages = 0; |
e3cfe529 TG |
654 | int i; |
655 | ||
656 | for_each_online_node(i) | |
1da177e4 | 657 | pages += free_all_bootmem_node(NODE_DATA(i)); |
e3cfe529 | 658 | |
08677214 | 659 | pages += free_all_memory_core_early(MAX_NUMNODES); |
08677214 | 660 | |
1da177e4 | 661 | return pages; |
e3cfe529 | 662 | } |
1da177e4 | 663 | |
2c8c0e6b | 664 | static __init int numa_setup(char *opt) |
e3cfe529 | 665 | { |
2c8c0e6b AK |
666 | if (!opt) |
667 | return -EINVAL; | |
e3cfe529 | 668 | if (!strncmp(opt, "off", 3)) |
1da177e4 LT |
669 | numa_off = 1; |
670 | #ifdef CONFIG_NUMA_EMU | |
8b8ca80e DR |
671 | if (!strncmp(opt, "fake=", 5)) |
672 | cmdline = opt + 5; | |
1da177e4 LT |
673 | #endif |
674 | #ifdef CONFIG_ACPI_NUMA | |
e3cfe529 TG |
675 | if (!strncmp(opt, "noacpi", 6)) |
676 | acpi_numa = -1; | |
1da177e4 | 677 | #endif |
2c8c0e6b | 678 | return 0; |
e3cfe529 | 679 | } |
2c8c0e6b AK |
680 | early_param("numa", numa_setup); |
681 | ||
23ca4bba | 682 | #ifdef CONFIG_NUMA |
d9c2d5ac YL |
683 | |
684 | static __init int find_near_online_node(int node) | |
685 | { | |
686 | int n, val; | |
687 | int min_val = INT_MAX; | |
688 | int best_node = -1; | |
689 | ||
690 | for_each_online_node(n) { | |
691 | val = node_distance(node, n); | |
692 | ||
693 | if (val < min_val) { | |
694 | min_val = val; | |
695 | best_node = n; | |
696 | } | |
697 | } | |
698 | ||
699 | return best_node; | |
700 | } | |
701 | ||
05b3cbd8 RT |
702 | /* |
703 | * Setup early cpu_to_node. | |
704 | * | |
705 | * Populate cpu_to_node[] only if x86_cpu_to_apicid[], | |
706 | * and apicid_to_node[] tables have valid entries for a CPU. | |
707 | * This means we skip cpu_to_node[] initialisation for NUMA | |
708 | * emulation and faking node case (when running a kernel compiled | |
709 | * for NUMA on a non NUMA box), which is OK as cpu_to_node[] | |
710 | * is already initialized in a round robin manner at numa_init_array, | |
711 | * prior to this call, and this initialization is good enough | |
712 | * for the fake NUMA cases. | |
23ca4bba MT |
713 | * |
714 | * Called before the per_cpu areas are setup. | |
05b3cbd8 RT |
715 | */ |
716 | void __init init_cpu_to_node(void) | |
717 | { | |
23ca4bba MT |
718 | int cpu; |
719 | u16 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid); | |
e3cfe529 | 720 | |
23ca4bba MT |
721 | BUG_ON(cpu_to_apicid == NULL); |
722 | ||
723 | for_each_possible_cpu(cpu) { | |
7c9e92b6 | 724 | int node; |
23ca4bba | 725 | u16 apicid = cpu_to_apicid[cpu]; |
e3cfe529 | 726 | |
05b3cbd8 RT |
727 | if (apicid == BAD_APICID) |
728 | continue; | |
7c9e92b6 YL |
729 | node = apicid_to_node[apicid]; |
730 | if (node == NUMA_NO_NODE) | |
05b3cbd8 | 731 | continue; |
7c9e92b6 | 732 | if (!node_online(node)) |
d9c2d5ac | 733 | node = find_near_online_node(node); |
23ca4bba | 734 | numa_set_node(cpu, node); |
05b3cbd8 RT |
735 | } |
736 | } | |
23ca4bba | 737 | #endif |
05b3cbd8 | 738 | |
cf050132 | 739 | |
6470aff6 BG |
740 | void __cpuinit numa_set_node(int cpu, int node) |
741 | { | |
742 | int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map); | |
743 | ||
744 | /* early setting, no percpu area yet */ | |
745 | if (cpu_to_node_map) { | |
746 | cpu_to_node_map[cpu] = node; | |
747 | return; | |
748 | } | |
749 | ||
750 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS | |
44581a28 | 751 | if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) { |
6470aff6 BG |
752 | printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu); |
753 | dump_stack(); | |
754 | return; | |
755 | } | |
756 | #endif | |
757 | per_cpu(x86_cpu_to_node_map, cpu) = node; | |
758 | ||
759 | if (node != NUMA_NO_NODE) | |
e534c7c5 | 760 | set_cpu_numa_node(cpu, node); |
6470aff6 BG |
761 | } |
762 | ||
763 | void __cpuinit numa_clear_node(int cpu) | |
764 | { | |
765 | numa_set_node(cpu, NUMA_NO_NODE); | |
766 | } | |
767 | ||
768 | #ifndef CONFIG_DEBUG_PER_CPU_MAPS | |
769 | ||
770 | void __cpuinit numa_add_cpu(int cpu) | |
771 | { | |
c032ef60 | 772 | cpumask_set_cpu(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]); |
6470aff6 BG |
773 | } |
774 | ||
775 | void __cpuinit numa_remove_cpu(int cpu) | |
776 | { | |
c032ef60 | 777 | cpumask_clear_cpu(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]); |
6470aff6 BG |
778 | } |
779 | ||
780 | #else /* CONFIG_DEBUG_PER_CPU_MAPS */ | |
781 | ||
782 | /* | |
783 | * --------- debug versions of the numa functions --------- | |
784 | */ | |
785 | static void __cpuinit numa_set_cpumask(int cpu, int enable) | |
786 | { | |
787 | int node = early_cpu_to_node(cpu); | |
73e907de | 788 | struct cpumask *mask; |
6470aff6 BG |
789 | char buf[64]; |
790 | ||
c032ef60 RR |
791 | mask = node_to_cpumask_map[node]; |
792 | if (mask == NULL) { | |
793 | printk(KERN_ERR "node_to_cpumask_map[%i] NULL\n", node); | |
6470aff6 BG |
794 | dump_stack(); |
795 | return; | |
796 | } | |
797 | ||
6470aff6 | 798 | if (enable) |
c032ef60 | 799 | cpumask_set_cpu(cpu, mask); |
6470aff6 | 800 | else |
c032ef60 | 801 | cpumask_clear_cpu(cpu, mask); |
6470aff6 BG |
802 | |
803 | cpulist_scnprintf(buf, sizeof(buf), mask); | |
804 | printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n", | |
805 | enable ? "numa_add_cpu" : "numa_remove_cpu", cpu, node, buf); | |
806 | } | |
807 | ||
808 | void __cpuinit numa_add_cpu(int cpu) | |
809 | { | |
810 | numa_set_cpumask(cpu, 1); | |
811 | } | |
812 | ||
813 | void __cpuinit numa_remove_cpu(int cpu) | |
814 | { | |
815 | numa_set_cpumask(cpu, 0); | |
816 | } | |
817 | ||
e534c7c5 | 818 | int __cpu_to_node(int cpu) |
6470aff6 BG |
819 | { |
820 | if (early_per_cpu_ptr(x86_cpu_to_node_map)) { | |
821 | printk(KERN_WARNING | |
822 | "cpu_to_node(%d): usage too early!\n", cpu); | |
823 | dump_stack(); | |
824 | return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu]; | |
825 | } | |
826 | return per_cpu(x86_cpu_to_node_map, cpu); | |
827 | } | |
e534c7c5 | 828 | EXPORT_SYMBOL(__cpu_to_node); |
6470aff6 BG |
829 | |
830 | /* | |
831 | * Same function as cpu_to_node() but used if called before the | |
832 | * per_cpu areas are setup. | |
833 | */ | |
834 | int early_cpu_to_node(int cpu) | |
835 | { | |
836 | if (early_per_cpu_ptr(x86_cpu_to_node_map)) | |
837 | return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu]; | |
838 | ||
44581a28 | 839 | if (!cpu_possible(cpu)) { |
6470aff6 BG |
840 | printk(KERN_WARNING |
841 | "early_cpu_to_node(%d): no per_cpu area!\n", cpu); | |
842 | dump_stack(); | |
843 | return NUMA_NO_NODE; | |
844 | } | |
845 | return per_cpu(x86_cpu_to_node_map, cpu); | |
846 | } | |
847 | ||
6470aff6 BG |
848 | /* |
849 | * --------- end of debug versions of the numa functions --------- | |
850 | */ | |
851 | ||
852 | #endif /* CONFIG_DEBUG_PER_CPU_MAPS */ |