1
2
3
4
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/memblock.h>
11#include <linux/mmzone.h>
12#include <linux/ctype.h>
13#include <linux/module.h>
14#include <linux/nodemask.h>
15#include <linux/sched.h>
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>
22#include <asm/amd_nb.h>
23
24struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
25EXPORT_SYMBOL(node_data);
26
27struct memnode memnode;
28
29s16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
30 [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
31};
32
33static unsigned long __initdata nodemap_addr;
34static unsigned long __initdata nodemap_size;
35
36
37
38
39DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
40EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
41
42
43
44
45
46
47
48
49static int __init populate_memnodemap(const struct bootnode *nodes,
50 int numnodes, int shift, int *nodeids)
51{
52 unsigned long addr, end;
53 int i, res = -1;
54
55 memset(memnodemap, 0xff, sizeof(s16)*memnodemapsize);
56 for (i = 0; i < numnodes; i++) {
57 addr = nodes[i].start;
58 end = nodes[i].end;
59 if (addr >= end)
60 continue;
61 if ((end >> shift) >= memnodemapsize)
62 return 0;
63 do {
64 if (memnodemap[addr >> shift] != NUMA_NO_NODE)
65 return -1;
66
67 if (!nodeids)
68 memnodemap[addr >> shift] = i;
69 else
70 memnodemap[addr >> shift] = nodeids[i];
71
72 addr += (1UL << shift);
73 } while (addr < end);
74 res = 1;
75 }
76 return res;
77}
78
79static int __init allocate_cachealigned_memnodemap(void)
80{
81 unsigned long addr;
82
83 memnodemap = memnode.embedded_map;
84 if (memnodemapsize <= ARRAY_SIZE(memnode.embedded_map))
85 return 0;
86
87 addr = 0x8000;
88 nodemap_size = roundup(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES);
89 nodemap_addr = memblock_find_in_range(addr, max_pfn<<PAGE_SHIFT,
90 nodemap_size, L1_CACHE_BYTES);
91 if (nodemap_addr == MEMBLOCK_ERROR) {
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 }
97 memnodemap = phys_to_virt(nodemap_addr);
98 memblock_x86_reserve_range(nodemap_addr, nodemap_addr + nodemap_size, "MEMNODEMAP");
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
107
108
109static int __init extract_lsb_from_nodes(const struct bootnode *nodes,
110 int numnodes)
111{
112 int i, nodes_used = 0;
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;
121 bitfield |= start;
122 nodes_used++;
123 if (end > memtop)
124 memtop = end;
125 }
126 if (nodes_used <= 1)
127 i = 63;
128 else
129 i = find_first_bit(&bitfield, sizeof(unsigned long)*8);
130 memnodemapsize = (memtop >> i)+1;
131 return i;
132}
133
134int __init compute_hash_shift(struct bootnode *nodes, int numnodes,
135 int *nodeids)
136{
137 int shift;
138
139 shift = extract_lsb_from_nodes(nodes, numnodes);
140 if (allocate_cachealigned_memnodemap())
141 return -1;
142 printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n",
143 shift);
144
145 if (populate_memnodemap(nodes, numnodes, shift, nodeids) != 1) {
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);
149 return -1;
150 }
151 return shift;
152}
153
154int __meminit __early_pfn_to_nid(unsigned long pfn)
155{
156 return phys_to_nid(pfn << PAGE_SHIFT);
157}
158
159static void * __init early_node_mem(int nodeid, unsigned long start,
160 unsigned long end, unsigned long size,
161 unsigned long align)
162{
163 unsigned long mem;
164
165
166
167
168
169 if (start < (MAX_DMA_PFN<<PAGE_SHIFT))
170 start = MAX_DMA_PFN<<PAGE_SHIFT;
171 if (start < (MAX_DMA32_PFN<<PAGE_SHIFT) &&
172 end > (MAX_DMA32_PFN<<PAGE_SHIFT))
173 start = MAX_DMA32_PFN<<PAGE_SHIFT;
174 mem = memblock_x86_find_in_range_node(nodeid, start, end, size, align);
175 if (mem != MEMBLOCK_ERROR)
176 return __va(mem);
177
178
179 end = max_pfn_mapped << PAGE_SHIFT;
180 start = MAX_DMA_PFN << PAGE_SHIFT;
181 mem = memblock_find_in_range(start, end, size, align);
182 if (mem != MEMBLOCK_ERROR)
183 return __va(mem);
184
185 printk(KERN_ERR "Cannot find %lu bytes in node %d\n",
186 size, nodeid);
187
188 return NULL;
189}
190
191
192void __init
193setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
194{
195 unsigned long start_pfn, last_pfn, nodedata_phys;
196 const int pgdat_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
197 int nid;
198
199 if (!end)
200 return;
201
202
203
204
205
206 if (end && (end - start) < NODE_MIN_SIZE)
207 return;
208
209 start = roundup(start, ZONE_ALIGN);
210
211 printk(KERN_INFO "Initmem setup node %d %016lx-%016lx\n", nodeid,
212 start, end);
213
214 start_pfn = start >> PAGE_SHIFT;
215 last_pfn = end >> PAGE_SHIFT;
216
217 node_data[nodeid] = early_node_mem(nodeid, start, end, pgdat_size,
218 SMP_CACHE_BYTES);
219 if (node_data[nodeid] == NULL)
220 return;
221 nodedata_phys = __pa(node_data[nodeid]);
222 memblock_x86_reserve_range(nodedata_phys, nodedata_phys + pgdat_size, "NODE_DATA");
223 printk(KERN_INFO " NODE_DATA [%016lx - %016lx]\n", nodedata_phys,
224 nodedata_phys + pgdat_size - 1);
225 nid = phys_to_nid(nodedata_phys);
226 if (nid != nodeid)
227 printk(KERN_INFO " NODE_DATA(%d) on node %d\n", nodeid, nid);
228
229 memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t));
230 NODE_DATA(nodeid)->node_id = nodeid;
231 NODE_DATA(nodeid)->node_start_pfn = start_pfn;
232 NODE_DATA(nodeid)->node_spanned_pages = last_pfn - start_pfn;
233
234 node_set_online(nodeid);
235}
236
237
238
239
240
241
242
243
244void __init numa_init_array(void)
245{
246 int rr, i;
247
248 rr = first_node(node_online_map);
249 for (i = 0; i < nr_cpu_ids; i++) {
250 if (early_cpu_to_node(i) != NUMA_NO_NODE)
251 continue;
252 numa_set_node(i, rr);
253 rr = next_node(rr, node_online_map);
254 if (rr == MAX_NUMNODES)
255 rr = first_node(node_online_map);
256 }
257}
258
259#ifdef CONFIG_NUMA_EMU
260
261static struct bootnode nodes[MAX_NUMNODES] __initdata;
262static struct bootnode physnodes[MAX_NUMNODES] __cpuinitdata;
263static char *cmdline __initdata;
264
265void __init numa_emu_cmdline(char *str)
266{
267 cmdline = str;
268}
269
270static int __init setup_physnodes(unsigned long start, unsigned long end,
271 int acpi, int amd)
272{
273 int ret = 0;
274 int i;
275
276 memset(physnodes, 0, sizeof(physnodes));
277#ifdef CONFIG_ACPI_NUMA
278 if (acpi)
279 acpi_get_nodes(physnodes, start, end);
280#endif
281#ifdef CONFIG_AMD_NUMA
282 if (amd)
283 amd_get_nodes(physnodes);
284#endif
285
286
287
288
289
290 for (i = 0; i < MAX_NUMNODES; i++) {
291 if (physnodes[i].start == physnodes[i].end)
292 continue;
293 if (physnodes[i].start > end) {
294 physnodes[i].end = physnodes[i].start;
295 continue;
296 }
297 if (physnodes[i].end < start) {
298 physnodes[i].start = physnodes[i].end;
299 continue;
300 }
301 if (physnodes[i].start < start)
302 physnodes[i].start = start;
303 if (physnodes[i].end > end)
304 physnodes[i].end = end;
305 ret++;
306 }
307
308
309
310
311
312 if (!ret) {
313 physnodes[ret].start = start;
314 physnodes[ret].end = end;
315 ret = 1;
316 }
317 return ret;
318}
319
320static void __init fake_physnodes(int acpi, int amd, int nr_nodes)
321{
322 int i;
323
324 BUG_ON(acpi && amd);
325#ifdef CONFIG_ACPI_NUMA
326 if (acpi)
327 acpi_fake_nodes(nodes, nr_nodes);
328#endif
329#ifdef CONFIG_AMD_NUMA
330 if (amd)
331 amd_fake_nodes(nodes, nr_nodes);
332#endif
333 if (!acpi && !amd)
334 for (i = 0; i < nr_cpu_ids; i++)
335 numa_set_node(i, 0);
336}
337
338
339
340
341
342
343
344
345static int __init setup_node_range(int nid, u64 *addr, u64 size, u64 max_addr)
346{
347 int ret = 0;
348 nodes[nid].start = *addr;
349 *addr += size;
350 if (*addr >= max_addr) {
351 *addr = max_addr;
352 ret = -1;
353 }
354 nodes[nid].end = *addr;
355 node_set(nid, node_possible_map);
356 printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n", nid,
357 nodes[nid].start, nodes[nid].end,
358 (nodes[nid].end - nodes[nid].start) >> 20);
359 return ret;
360}
361
362
363
364
365
366static int __init split_nodes_interleave(u64 addr, u64 max_addr, int nr_nodes)
367{
368 nodemask_t physnode_mask = NODE_MASK_NONE;
369 u64 size;
370 int big;
371 int ret = 0;
372 int i;
373
374 if (nr_nodes <= 0)
375 return -1;
376 if (nr_nodes > MAX_NUMNODES) {
377 pr_info("numa=fake=%d too large, reducing to %d\n",
378 nr_nodes, MAX_NUMNODES);
379 nr_nodes = MAX_NUMNODES;
380 }
381
382 size = (max_addr - addr - memblock_x86_hole_size(addr, max_addr)) / nr_nodes;
383
384
385
386
387 big = ((size & ~FAKE_NODE_MIN_HASH_MASK) * nr_nodes) /
388 FAKE_NODE_MIN_SIZE;
389
390 size &= FAKE_NODE_MIN_HASH_MASK;
391 if (!size) {
392 pr_err("Not enough memory for each node. "
393 "NUMA emulation disabled.\n");
394 return -1;
395 }
396
397 for (i = 0; i < MAX_NUMNODES; i++)
398 if (physnodes[i].start != physnodes[i].end)
399 node_set(i, physnode_mask);
400
401
402
403
404
405 while (nodes_weight(physnode_mask)) {
406 for_each_node_mask(i, physnode_mask) {
407 u64 end = physnodes[i].start + size;
408 u64 dma32_end = PFN_PHYS(MAX_DMA32_PFN);
409
410 if (ret < big)
411 end += FAKE_NODE_MIN_SIZE;
412
413
414
415
416
417 while (end - physnodes[i].start -
418 memblock_x86_hole_size(physnodes[i].start, end) < size) {
419 end += FAKE_NODE_MIN_SIZE;
420 if (end > physnodes[i].end) {
421 end = physnodes[i].end;
422 break;
423 }
424 }
425
426
427
428
429
430
431 if (end < dma32_end && dma32_end - end -
432 memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
433 end = dma32_end;
434
435
436
437
438
439
440 if (physnodes[i].end - end -
441 memblock_x86_hole_size(end, physnodes[i].end) < size)
442 end = physnodes[i].end;
443
444
445
446
447
448
449 if (nodes_weight(physnode_mask) + ret >= nr_nodes)
450 end = physnodes[i].end;
451
452 if (setup_node_range(ret++, &physnodes[i].start,
453 end - physnodes[i].start,
454 physnodes[i].end) < 0)
455 node_clear(i, physnode_mask);
456 }
457 }
458 return ret;
459}
460
461
462
463
464
465static u64 __init find_end_of_node(u64 start, u64 max_addr, u64 size)
466{
467 u64 end = start + size;
468
469 while (end - start - memblock_x86_hole_size(start, end) < size) {
470 end += FAKE_NODE_MIN_SIZE;
471 if (end > max_addr) {
472 end = max_addr;
473 break;
474 }
475 }
476 return end;
477}
478
479
480
481
482
483static int __init split_nodes_size_interleave(u64 addr, u64 max_addr, u64 size)
484{
485 nodemask_t physnode_mask = NODE_MASK_NONE;
486 u64 min_size;
487 int ret = 0;
488 int i;
489
490 if (!size)
491 return -1;
492
493
494
495
496
497
498 min_size = (max_addr - addr - memblock_x86_hole_size(addr, max_addr)) /
499 MAX_NUMNODES;
500 min_size = max(min_size, FAKE_NODE_MIN_SIZE);
501 if ((min_size & FAKE_NODE_MIN_HASH_MASK) < min_size)
502 min_size = (min_size + FAKE_NODE_MIN_SIZE) &
503 FAKE_NODE_MIN_HASH_MASK;
504 if (size < min_size) {
505 pr_err("Fake node size %LuMB too small, increasing to %LuMB\n",
506 size >> 20, min_size >> 20);
507 size = min_size;
508 }
509 size &= FAKE_NODE_MIN_HASH_MASK;
510
511 for (i = 0; i < MAX_NUMNODES; i++)
512 if (physnodes[i].start != physnodes[i].end)
513 node_set(i, physnode_mask);
514
515
516
517
518 while (nodes_weight(physnode_mask)) {
519 for_each_node_mask(i, physnode_mask) {
520 u64 dma32_end = MAX_DMA32_PFN << PAGE_SHIFT;
521 u64 end;
522
523 end = find_end_of_node(physnodes[i].start,
524 physnodes[i].end, size);
525
526
527
528
529
530 if (end < dma32_end && dma32_end - end -
531 memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
532 end = dma32_end;
533
534
535
536
537
538
539 if (physnodes[i].end - end -
540 memblock_x86_hole_size(end, physnodes[i].end) < size)
541 end = physnodes[i].end;
542
543
544
545
546
547
548 if (setup_node_range(ret++, &physnodes[i].start,
549 end - physnodes[i].start,
550 physnodes[i].end) < 0)
551 node_clear(i, physnode_mask);
552 }
553 }
554 return ret;
555}
556
557
558
559
560
561static int __init numa_emulation(unsigned long start_pfn,
562 unsigned long last_pfn, int acpi, int amd)
563{
564 u64 addr = start_pfn << PAGE_SHIFT;
565 u64 max_addr = last_pfn << PAGE_SHIFT;
566 int num_nodes;
567 int i;
568
569
570
571
572
573
574 if (strchr(cmdline, 'M') || strchr(cmdline, 'G')) {
575 u64 size;
576
577 size = memparse(cmdline, &cmdline);
578 num_nodes = split_nodes_size_interleave(addr, max_addr, size);
579 } else {
580 unsigned long n;
581
582 n = simple_strtoul(cmdline, NULL, 0);
583 num_nodes = split_nodes_interleave(addr, max_addr, n);
584 }
585
586 if (num_nodes < 0)
587 return num_nodes;
588 memnode_shift = compute_hash_shift(nodes, num_nodes, NULL);
589 if (memnode_shift < 0) {
590 memnode_shift = 0;
591 printk(KERN_ERR "No NUMA hash function found. NUMA emulation "
592 "disabled.\n");
593 return -1;
594 }
595
596
597
598
599
600 remove_all_active_ranges();
601 for_each_node_mask(i, node_possible_map) {
602 memblock_x86_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
603 nodes[i].end >> PAGE_SHIFT);
604 setup_node_bootmem(i, nodes[i].start, nodes[i].end);
605 }
606 setup_physnodes(addr, max_addr, acpi, amd);
607 fake_physnodes(acpi, amd, num_nodes);
608 numa_init_array();
609 return 0;
610}
611#endif
612
613void __init initmem_init(unsigned long start_pfn, unsigned long last_pfn,
614 int acpi, int amd)
615{
616 int i;
617
618 nodes_clear(node_possible_map);
619 nodes_clear(node_online_map);
620
621#ifdef CONFIG_NUMA_EMU
622 setup_physnodes(start_pfn << PAGE_SHIFT, last_pfn << PAGE_SHIFT,
623 acpi, amd);
624 if (cmdline && !numa_emulation(start_pfn, last_pfn, acpi, amd))
625 return;
626 setup_physnodes(start_pfn << PAGE_SHIFT, last_pfn << PAGE_SHIFT,
627 acpi, amd);
628 nodes_clear(node_possible_map);
629 nodes_clear(node_online_map);
630#endif
631
632#ifdef CONFIG_ACPI_NUMA
633 if (!numa_off && acpi && !acpi_scan_nodes(start_pfn << PAGE_SHIFT,
634 last_pfn << PAGE_SHIFT))
635 return;
636 nodes_clear(node_possible_map);
637 nodes_clear(node_online_map);
638#endif
639
640#ifdef CONFIG_AMD_NUMA
641 if (!numa_off && amd && !amd_scan_nodes())
642 return;
643 nodes_clear(node_possible_map);
644 nodes_clear(node_online_map);
645#endif
646 printk(KERN_INFO "%s\n",
647 numa_off ? "NUMA turned off" : "No NUMA configuration found");
648
649 printk(KERN_INFO "Faking a node at %016lx-%016lx\n",
650 start_pfn << PAGE_SHIFT,
651 last_pfn << PAGE_SHIFT);
652
653 memnode_shift = 63;
654 memnodemap = memnode.embedded_map;
655 memnodemap[0] = 0;
656 node_set_online(0);
657 node_set(0, node_possible_map);
658 for (i = 0; i < nr_cpu_ids; i++)
659 numa_set_node(i, 0);
660 memblock_x86_register_active_regions(0, start_pfn, last_pfn);
661 setup_node_bootmem(0, start_pfn << PAGE_SHIFT, last_pfn << PAGE_SHIFT);
662}
663
664unsigned long __init numa_free_all_bootmem(void)
665{
666 unsigned long pages = 0;
667 int i;
668
669 for_each_online_node(i)
670 pages += free_all_bootmem_node(NODE_DATA(i));
671
672 pages += free_all_memory_core_early(MAX_NUMNODES);
673
674 return pages;
675}
676
677#ifdef CONFIG_NUMA
678
679static __init int find_near_online_node(int node)
680{
681 int n, val;
682 int min_val = INT_MAX;
683 int best_node = -1;
684
685 for_each_online_node(n) {
686 val = node_distance(node, n);
687
688 if (val < min_val) {
689 min_val = val;
690 best_node = n;
691 }
692 }
693
694 return best_node;
695}
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711void __init init_cpu_to_node(void)
712{
713 int cpu;
714 u16 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid);
715
716 BUG_ON(cpu_to_apicid == NULL);
717
718 for_each_possible_cpu(cpu) {
719 int node;
720 u16 apicid = cpu_to_apicid[cpu];
721
722 if (apicid == BAD_APICID)
723 continue;
724 node = apicid_to_node[apicid];
725 if (node == NUMA_NO_NODE)
726 continue;
727 if (!node_online(node))
728 node = find_near_online_node(node);
729 numa_set_node(cpu, node);
730 }
731}
732#endif
733
734
735void __cpuinit numa_set_node(int cpu, int node)
736{
737 int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
738
739
740 if (cpu_to_node_map) {
741 cpu_to_node_map[cpu] = node;
742 return;
743 }
744
745#ifdef CONFIG_DEBUG_PER_CPU_MAPS
746 if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) {
747 printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
748 dump_stack();
749 return;
750 }
751#endif
752 per_cpu(x86_cpu_to_node_map, cpu) = node;
753
754 if (node != NUMA_NO_NODE)
755 set_cpu_numa_node(cpu, node);
756}
757
758void __cpuinit numa_clear_node(int cpu)
759{
760 numa_set_node(cpu, NUMA_NO_NODE);
761}
762
763#ifndef CONFIG_DEBUG_PER_CPU_MAPS
764
765#ifndef CONFIG_NUMA_EMU
766void __cpuinit numa_add_cpu(int cpu)
767{
768 cpumask_set_cpu(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
769}
770
771void __cpuinit numa_remove_cpu(int cpu)
772{
773 cpumask_clear_cpu(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
774}
775#else
776void __cpuinit numa_add_cpu(int cpu)
777{
778 unsigned long addr;
779 u16 apicid;
780 int physnid;
781 int nid = NUMA_NO_NODE;
782
783 nid = early_cpu_to_node(cpu);
784 BUG_ON(nid == NUMA_NO_NODE || !node_online(nid));
785
786
787
788
789
790 addr = node_start_pfn(nid) << PAGE_SHIFT;
791 for (physnid = 0; physnid < MAX_NUMNODES; physnid++)
792 if (addr >= physnodes[physnid].start &&
793 addr < physnodes[physnid].end)
794 break;
795
796
797
798
799
800 for_each_online_node(nid) {
801 addr = node_start_pfn(nid) << PAGE_SHIFT;
802 if (addr >= physnodes[physnid].start &&
803 addr < physnodes[physnid].end)
804 cpumask_set_cpu(cpu, node_to_cpumask_map[nid]);
805 }
806}
807
808void __cpuinit numa_remove_cpu(int cpu)
809{
810 int i;
811
812 for_each_online_node(i)
813 cpumask_clear_cpu(cpu, node_to_cpumask_map[i]);
814}
815#endif
816
817#else
818static struct cpumask __cpuinit *debug_cpumask_set_cpu(int cpu, int enable)
819{
820 int node = early_cpu_to_node(cpu);
821 struct cpumask *mask;
822 char buf[64];
823
824 mask = node_to_cpumask_map[node];
825 if (!mask) {
826 pr_err("node_to_cpumask_map[%i] NULL\n", node);
827 dump_stack();
828 return NULL;
829 }
830
831 cpulist_scnprintf(buf, sizeof(buf), mask);
832 printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n",
833 enable ? "numa_add_cpu" : "numa_remove_cpu",
834 cpu, node, buf);
835 return mask;
836}
837
838
839
840
841#ifndef CONFIG_NUMA_EMU
842static void __cpuinit numa_set_cpumask(int cpu, int enable)
843{
844 struct cpumask *mask;
845
846 mask = debug_cpumask_set_cpu(cpu, enable);
847 if (!mask)
848 return;
849
850 if (enable)
851 cpumask_set_cpu(cpu, mask);
852 else
853 cpumask_clear_cpu(cpu, mask);
854}
855#else
856static void __cpuinit numa_set_cpumask(int cpu, int enable)
857{
858 int node = early_cpu_to_node(cpu);
859 struct cpumask *mask;
860 int i;
861
862 for_each_online_node(i) {
863 unsigned long addr;
864
865 addr = node_start_pfn(i) << PAGE_SHIFT;
866 if (addr < physnodes[node].start ||
867 addr >= physnodes[node].end)
868 continue;
869 mask = debug_cpumask_set_cpu(cpu, enable);
870 if (!mask)
871 return;
872
873 if (enable)
874 cpumask_set_cpu(cpu, mask);
875 else
876 cpumask_clear_cpu(cpu, mask);
877 }
878}
879#endif
880
881void __cpuinit numa_add_cpu(int cpu)
882{
883 numa_set_cpumask(cpu, 1);
884}
885
886void __cpuinit numa_remove_cpu(int cpu)
887{
888 numa_set_cpumask(cpu, 0);
889}
890
891int __cpu_to_node(int cpu)
892{
893 if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
894 printk(KERN_WARNING
895 "cpu_to_node(%d): usage too early!\n", cpu);
896 dump_stack();
897 return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
898 }
899 return per_cpu(x86_cpu_to_node_map, cpu);
900}
901EXPORT_SYMBOL(__cpu_to_node);
902
903
904
905
906
907int early_cpu_to_node(int cpu)
908{
909 if (early_per_cpu_ptr(x86_cpu_to_node_map))
910 return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
911
912 if (!cpu_possible(cpu)) {
913 printk(KERN_WARNING
914 "early_cpu_to_node(%d): no per_cpu area!\n", cpu);
915 dump_stack();
916 return NUMA_NO_NODE;
917 }
918 return per_cpu(x86_cpu_to_node_map, cpu);
919}
920
921
922
923
924
925#endif
926