Commit | Line | Data |
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4fe29a85 GOC |
1 | #include <linux/kernel.h> |
2 | #include <linux/module.h> | |
3 | #include <linux/init.h> | |
4 | #include <linux/bootmem.h> | |
5 | #include <linux/percpu.h> | |
1ecd2765 | 6 | #include <linux/kexec.h> |
17b4cceb | 7 | #include <linux/crash_dump.h> |
8a87dd9a JSR |
8 | #include <linux/smp.h> |
9 | #include <linux/topology.h> | |
5f5d8405 | 10 | #include <linux/pfn.h> |
4fe29a85 GOC |
11 | #include <asm/sections.h> |
12 | #include <asm/processor.h> | |
13 | #include <asm/setup.h> | |
0fc0906e | 14 | #include <asm/mpspec.h> |
76eb4131 | 15 | #include <asm/apicdef.h> |
1ecd2765 | 16 | #include <asm/highmem.h> |
1a51e3a0 | 17 | #include <asm/proto.h> |
06879033 | 18 | #include <asm/cpumask.h> |
34019be1 | 19 | #include <asm/cpu.h> |
60a5317f | 20 | #include <asm/stackprotector.h> |
76eb4131 | 21 | |
c90aa894 MT |
22 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS |
23 | # define DBG(x...) printk(KERN_DEBUG x) | |
24 | #else | |
25 | # define DBG(x...) | |
26 | #endif | |
27 | ||
ea927906 BG |
28 | DEFINE_PER_CPU(int, cpu_number); |
29 | EXPORT_PER_CPU_SYMBOL(cpu_number); | |
ea927906 | 30 | |
1688401a BG |
31 | #ifdef CONFIG_X86_64 |
32 | #define BOOT_PERCPU_OFFSET ((unsigned long)__per_cpu_load) | |
33 | #else | |
34 | #define BOOT_PERCPU_OFFSET 0 | |
35 | #endif | |
36 | ||
37 | DEFINE_PER_CPU(unsigned long, this_cpu_off) = BOOT_PERCPU_OFFSET; | |
38 | EXPORT_PER_CPU_SYMBOL(this_cpu_off); | |
39 | ||
9939ddaf | 40 | unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = { |
34019be1 | 41 | [0 ... NR_CPUS-1] = BOOT_PERCPU_OFFSET, |
9939ddaf | 42 | }; |
9939ddaf | 43 | EXPORT_SYMBOL(__per_cpu_offset); |
4fe29a85 | 44 | |
6b19b0c2 TH |
45 | /* |
46 | * On x86_64 symbols referenced from code should be reachable using | |
47 | * 32bit relocations. Reserve space for static percpu variables in | |
48 | * modules so that they are always served from the first chunk which | |
49 | * is located at the percpu segment base. On x86_32, anything can | |
50 | * address anywhere. No need to reserve space in the first chunk. | |
51 | */ | |
52 | #ifdef CONFIG_X86_64 | |
53 | #define PERCPU_FIRST_CHUNK_RESERVE PERCPU_MODULE_RESERVE | |
54 | #else | |
55 | #define PERCPU_FIRST_CHUNK_RESERVE 0 | |
56 | #endif | |
57 | ||
89c92151 TH |
58 | /** |
59 | * pcpu_need_numa - determine percpu allocation needs to consider NUMA | |
60 | * | |
61 | * If NUMA is not configured or there is only one NUMA node available, | |
62 | * there is no reason to consider NUMA. This function determines | |
63 | * whether percpu allocation should consider NUMA or not. | |
64 | * | |
65 | * RETURNS: | |
66 | * true if NUMA should be considered; otherwise, false. | |
67 | */ | |
68 | static bool __init pcpu_need_numa(void) | |
69 | { | |
70 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
71 | pg_data_t *last = NULL; | |
72 | unsigned int cpu; | |
73 | ||
74 | for_each_possible_cpu(cpu) { | |
75 | int node = early_cpu_to_node(cpu); | |
76 | ||
77 | if (node_online(node) && NODE_DATA(node) && | |
78 | last && last != NODE_DATA(node)) | |
79 | return true; | |
80 | ||
81 | last = NODE_DATA(node); | |
82 | } | |
83 | #endif | |
84 | return false; | |
85 | } | |
86 | ||
5f5d8405 TH |
87 | /** |
88 | * pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu | |
89 | * @cpu: cpu to allocate for | |
90 | * @size: size allocation in bytes | |
91 | * @align: alignment | |
92 | * | |
93 | * Allocate @size bytes aligned at @align for cpu @cpu. This wrapper | |
94 | * does the right thing for NUMA regardless of the current | |
95 | * configuration. | |
96 | * | |
97 | * RETURNS: | |
98 | * Pointer to the allocated area on success, NULL on failure. | |
99 | */ | |
100 | static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size, | |
101 | unsigned long align) | |
102 | { | |
103 | const unsigned long goal = __pa(MAX_DMA_ADDRESS); | |
104 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
105 | int node = early_cpu_to_node(cpu); | |
106 | void *ptr; | |
107 | ||
108 | if (!node_online(node) || !NODE_DATA(node)) { | |
109 | ptr = __alloc_bootmem_nopanic(size, align, goal); | |
110 | pr_info("cpu %d has no node %d or node-local memory\n", | |
111 | cpu, node); | |
112 | pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n", | |
113 | cpu, size, __pa(ptr)); | |
114 | } else { | |
115 | ptr = __alloc_bootmem_node_nopanic(NODE_DATA(node), | |
116 | size, align, goal); | |
117 | pr_debug("per cpu data for cpu%d %lu bytes on node%d at " | |
118 | "%016lx\n", cpu, size, node, __pa(ptr)); | |
119 | } | |
120 | return ptr; | |
121 | #else | |
122 | return __alloc_bootmem_nopanic(size, align, goal); | |
123 | #endif | |
124 | } | |
125 | ||
8ac83757 | 126 | /* |
97c9bf06 | 127 | * Large page remap allocator |
8ac83757 TH |
128 | * |
129 | * This allocator uses PMD page as unit. A PMD page is allocated for | |
130 | * each cpu and each is remapped into vmalloc area using PMD mapping. | |
131 | * As PMD page is quite large, only part of it is used for the first | |
132 | * chunk. Unused part is returned to the bootmem allocator. | |
133 | * | |
134 | * So, the PMD pages are mapped twice - once to the physical mapping | |
135 | * and to the vmalloc area for the first percpu chunk. The double | |
136 | * mapping does add one more PMD TLB entry pressure but still is much | |
137 | * better than only using 4k mappings while still being NUMA friendly. | |
138 | */ | |
139 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
0ff2587f TH |
140 | struct pcpul_ent { |
141 | unsigned int cpu; | |
142 | void *ptr; | |
143 | }; | |
144 | ||
e59a1bb2 TH |
145 | static size_t pcpul_size; |
146 | static struct pcpul_ent *pcpul_map; | |
0ff2587f | 147 | static struct vm_struct pcpul_vm; |
8ac83757 | 148 | |
97c9bf06 | 149 | static struct page * __init pcpul_get_page(unsigned int cpu, int pageno) |
8ac83757 TH |
150 | { |
151 | size_t off = (size_t)pageno << PAGE_SHIFT; | |
152 | ||
97c9bf06 | 153 | if (off >= pcpul_size) |
8ac83757 TH |
154 | return NULL; |
155 | ||
0ff2587f | 156 | return virt_to_page(pcpul_map[cpu].ptr + off); |
8ac83757 TH |
157 | } |
158 | ||
fa8a7094 | 159 | static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen) |
8ac83757 | 160 | { |
0ff2587f | 161 | size_t map_size, dyn_size; |
8ac83757 | 162 | unsigned int cpu; |
e59a1bb2 | 163 | int i, j; |
8ac83757 TH |
164 | ssize_t ret; |
165 | ||
0017c869 TH |
166 | if (!chosen) { |
167 | size_t vm_size = VMALLOC_END - VMALLOC_START; | |
168 | size_t tot_size = num_possible_cpus() * PMD_SIZE; | |
169 | ||
170 | /* on non-NUMA, embedding is better */ | |
171 | if (!pcpu_need_numa()) | |
172 | return -EINVAL; | |
173 | ||
174 | /* don't consume more than 20% of vmalloc area */ | |
175 | if (tot_size > vm_size / 5) { | |
176 | pr_info("PERCPU: too large chunk size %zuMB for " | |
177 | "large page remap\n", tot_size >> 20); | |
178 | return -EINVAL; | |
179 | } | |
180 | } | |
8ac83757 | 181 | |
fa8a7094 TH |
182 | /* need PSE */ |
183 | if (!cpu_has_pse) { | |
184 | pr_warning("PERCPU: lpage allocator requires PSE\n"); | |
185 | return -EINVAL; | |
186 | } | |
187 | ||
8ac83757 TH |
188 | /* |
189 | * Currently supports only single page. Supporting multiple | |
190 | * pages won't be too difficult if it ever becomes necessary. | |
191 | */ | |
97c9bf06 | 192 | pcpul_size = PFN_ALIGN(static_size + PERCPU_MODULE_RESERVE + |
6b19b0c2 | 193 | PERCPU_DYNAMIC_RESERVE); |
97c9bf06 | 194 | if (pcpul_size > PMD_SIZE) { |
8ac83757 TH |
195 | pr_warning("PERCPU: static data is larger than large page, " |
196 | "can't use large page\n"); | |
197 | return -EINVAL; | |
198 | } | |
97c9bf06 | 199 | dyn_size = pcpul_size - static_size - PERCPU_FIRST_CHUNK_RESERVE; |
8ac83757 TH |
200 | |
201 | /* allocate pointer array and alloc large pages */ | |
0ff2587f TH |
202 | map_size = PFN_ALIGN(num_possible_cpus() * sizeof(pcpul_map[0])); |
203 | pcpul_map = alloc_bootmem(map_size); | |
8ac83757 TH |
204 | |
205 | for_each_possible_cpu(cpu) { | |
0ff2587f TH |
206 | pcpul_map[cpu].cpu = cpu; |
207 | pcpul_map[cpu].ptr = pcpu_alloc_bootmem(cpu, PMD_SIZE, | |
208 | PMD_SIZE); | |
fa8a7094 TH |
209 | if (!pcpul_map[cpu].ptr) { |
210 | pr_warning("PERCPU: failed to allocate large page " | |
211 | "for cpu%u\n", cpu); | |
8ac83757 | 212 | goto enomem; |
fa8a7094 | 213 | } |
8ac83757 TH |
214 | |
215 | /* | |
97c9bf06 | 216 | * Only use pcpul_size bytes and give back the rest. |
8ac83757 TH |
217 | * |
218 | * Ingo: The 2MB up-rounding bootmem is needed to make | |
219 | * sure the partial 2MB page is still fully RAM - it's | |
220 | * not well-specified to have a PAT-incompatible area | |
221 | * (unmapped RAM, device memory, etc.) in that hole. | |
222 | */ | |
0ff2587f | 223 | free_bootmem(__pa(pcpul_map[cpu].ptr + pcpul_size), |
97c9bf06 | 224 | PMD_SIZE - pcpul_size); |
8ac83757 | 225 | |
0ff2587f | 226 | memcpy(pcpul_map[cpu].ptr, __per_cpu_load, static_size); |
8ac83757 TH |
227 | } |
228 | ||
229 | /* allocate address and map */ | |
0ff2587f TH |
230 | pcpul_vm.flags = VM_ALLOC; |
231 | pcpul_vm.size = num_possible_cpus() * PMD_SIZE; | |
232 | vm_area_register_early(&pcpul_vm, PMD_SIZE); | |
8ac83757 TH |
233 | |
234 | for_each_possible_cpu(cpu) { | |
0ff2587f | 235 | pmd_t *pmd, pmd_v; |
8ac83757 | 236 | |
0ff2587f TH |
237 | pmd = populate_extra_pmd((unsigned long)pcpul_vm.addr + |
238 | cpu * PMD_SIZE); | |
239 | pmd_v = pfn_pmd(page_to_pfn(virt_to_page(pcpul_map[cpu].ptr)), | |
240 | PAGE_KERNEL_LARGE); | |
241 | set_pmd(pmd, pmd_v); | |
8ac83757 TH |
242 | } |
243 | ||
244 | /* we're ready, commit */ | |
245 | pr_info("PERCPU: Remapped at %p with large pages, static data " | |
0ff2587f | 246 | "%zu bytes\n", pcpul_vm.addr, static_size); |
8ac83757 | 247 | |
97c9bf06 | 248 | ret = pcpu_setup_first_chunk(pcpul_get_page, static_size, |
6074d5b0 | 249 | PERCPU_FIRST_CHUNK_RESERVE, dyn_size, |
0ff2587f | 250 | PMD_SIZE, pcpul_vm.addr, NULL); |
e59a1bb2 TH |
251 | |
252 | /* sort pcpul_map array for pcpu_lpage_remapped() */ | |
253 | for (i = 0; i < num_possible_cpus() - 1; i++) | |
254 | for (j = i + 1; j < num_possible_cpus(); j++) | |
255 | if (pcpul_map[i].ptr > pcpul_map[j].ptr) { | |
256 | struct pcpul_ent tmp = pcpul_map[i]; | |
257 | pcpul_map[i] = pcpul_map[j]; | |
258 | pcpul_map[j] = tmp; | |
259 | } | |
260 | ||
261 | return ret; | |
8ac83757 TH |
262 | |
263 | enomem: | |
264 | for_each_possible_cpu(cpu) | |
0ff2587f TH |
265 | if (pcpul_map[cpu].ptr) |
266 | free_bootmem(__pa(pcpul_map[cpu].ptr), pcpul_size); | |
0ff2587f | 267 | free_bootmem(__pa(pcpul_map), map_size); |
e59a1bb2 TH |
268 | return -ENOMEM; |
269 | } | |
270 | ||
271 | /** | |
272 | * pcpu_lpage_remapped - determine whether a kaddr is in pcpul recycled area | |
273 | * @kaddr: the kernel address in question | |
274 | * | |
275 | * Determine whether @kaddr falls in the pcpul recycled area. This is | |
276 | * used by pageattr to detect VM aliases and break up the pcpu PMD | |
277 | * mapping such that the same physical page is not mapped under | |
278 | * different attributes. | |
279 | * | |
280 | * The recycled area is always at the tail of a partially used PMD | |
281 | * page. | |
282 | * | |
283 | * RETURNS: | |
284 | * Address of corresponding remapped pcpu address if match is found; | |
285 | * otherwise, NULL. | |
286 | */ | |
287 | void *pcpu_lpage_remapped(void *kaddr) | |
288 | { | |
289 | void *pmd_addr = (void *)((unsigned long)kaddr & PMD_MASK); | |
290 | unsigned long offset = (unsigned long)kaddr & ~PMD_MASK; | |
291 | int left = 0, right = num_possible_cpus() - 1; | |
292 | int pos; | |
293 | ||
294 | /* pcpul in use at all? */ | |
295 | if (!pcpul_map) | |
296 | return NULL; | |
297 | ||
298 | /* okay, perform binary search */ | |
299 | while (left <= right) { | |
300 | pos = (left + right) / 2; | |
301 | ||
302 | if (pcpul_map[pos].ptr < pmd_addr) | |
303 | left = pos + 1; | |
304 | else if (pcpul_map[pos].ptr > pmd_addr) | |
305 | right = pos - 1; | |
306 | else { | |
307 | /* it shouldn't be in the area for the first chunk */ | |
308 | WARN_ON(offset < pcpul_size); | |
309 | ||
310 | return pcpul_vm.addr + | |
311 | pcpul_map[pos].cpu * PMD_SIZE + offset; | |
312 | } | |
313 | } | |
314 | ||
315 | return NULL; | |
8ac83757 TH |
316 | } |
317 | #else | |
fa8a7094 | 318 | static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen) |
8ac83757 TH |
319 | { |
320 | return -EINVAL; | |
321 | } | |
322 | #endif | |
323 | ||
89c92151 TH |
324 | /* |
325 | * Embedding allocator | |
326 | * | |
327 | * The first chunk is sized to just contain the static area plus | |
66c3a757 TH |
328 | * module and dynamic reserves and embedded into linear physical |
329 | * mapping so that it can use PMD mapping without additional TLB | |
330 | * pressure. | |
89c92151 | 331 | */ |
fa8a7094 | 332 | static ssize_t __init setup_pcpu_embed(size_t static_size, bool chosen) |
89c92151 | 333 | { |
66c3a757 | 334 | size_t reserve = PERCPU_MODULE_RESERVE + PERCPU_DYNAMIC_RESERVE; |
89c92151 TH |
335 | |
336 | /* | |
337 | * If large page isn't supported, there's no benefit in doing | |
338 | * this. Also, embedding allocation doesn't play well with | |
339 | * NUMA. | |
340 | */ | |
fa8a7094 | 341 | if (!chosen && (!cpu_has_pse || pcpu_need_numa())) |
89c92151 TH |
342 | return -EINVAL; |
343 | ||
66c3a757 TH |
344 | return pcpu_embed_first_chunk(static_size, PERCPU_FIRST_CHUNK_RESERVE, |
345 | reserve - PERCPU_FIRST_CHUNK_RESERVE, -1); | |
89c92151 TH |
346 | } |
347 | ||
5f5d8405 TH |
348 | /* |
349 | * 4k page allocator | |
350 | * | |
351 | * This is the basic allocator. Static percpu area is allocated | |
352 | * page-by-page and most of initialization is done by the generic | |
353 | * setup function. | |
354 | */ | |
8d408b4b TH |
355 | static struct page **pcpu4k_pages __initdata; |
356 | static int pcpu4k_nr_static_pages __initdata; | |
357 | ||
358 | static struct page * __init pcpu4k_get_page(unsigned int cpu, int pageno) | |
359 | { | |
360 | if (pageno < pcpu4k_nr_static_pages) | |
361 | return pcpu4k_pages[cpu * pcpu4k_nr_static_pages + pageno]; | |
362 | return NULL; | |
363 | } | |
364 | ||
458a3e64 TH |
365 | static void __init pcpu4k_populate_pte(unsigned long addr) |
366 | { | |
367 | populate_extra_pte(addr); | |
368 | } | |
369 | ||
5f5d8405 TH |
370 | static ssize_t __init setup_pcpu_4k(size_t static_size) |
371 | { | |
372 | size_t pages_size; | |
373 | unsigned int cpu; | |
374 | int i, j; | |
375 | ssize_t ret; | |
376 | ||
377 | pcpu4k_nr_static_pages = PFN_UP(static_size); | |
378 | ||
379 | /* unaligned allocations can't be freed, round up to page size */ | |
380 | pages_size = PFN_ALIGN(pcpu4k_nr_static_pages * num_possible_cpus() | |
381 | * sizeof(pcpu4k_pages[0])); | |
382 | pcpu4k_pages = alloc_bootmem(pages_size); | |
383 | ||
384 | /* allocate and copy */ | |
385 | j = 0; | |
386 | for_each_possible_cpu(cpu) | |
387 | for (i = 0; i < pcpu4k_nr_static_pages; i++) { | |
388 | void *ptr; | |
389 | ||
390 | ptr = pcpu_alloc_bootmem(cpu, PAGE_SIZE, PAGE_SIZE); | |
fa8a7094 TH |
391 | if (!ptr) { |
392 | pr_warning("PERCPU: failed to allocate " | |
393 | "4k page for cpu%u\n", cpu); | |
5f5d8405 | 394 | goto enomem; |
fa8a7094 | 395 | } |
5f5d8405 TH |
396 | |
397 | memcpy(ptr, __per_cpu_load + i * PAGE_SIZE, PAGE_SIZE); | |
398 | pcpu4k_pages[j++] = virt_to_page(ptr); | |
399 | } | |
400 | ||
401 | /* we're ready, commit */ | |
402 | pr_info("PERCPU: Allocated %d 4k pages, static data %zu bytes\n", | |
403 | pcpu4k_nr_static_pages, static_size); | |
404 | ||
6b19b0c2 | 405 | ret = pcpu_setup_first_chunk(pcpu4k_get_page, static_size, |
6074d5b0 TH |
406 | PERCPU_FIRST_CHUNK_RESERVE, -1, |
407 | -1, NULL, pcpu4k_populate_pte); | |
5f5d8405 TH |
408 | goto out_free_ar; |
409 | ||
410 | enomem: | |
411 | while (--j >= 0) | |
412 | free_bootmem(__pa(page_address(pcpu4k_pages[j])), PAGE_SIZE); | |
413 | ret = -ENOMEM; | |
414 | out_free_ar: | |
415 | free_bootmem(__pa(pcpu4k_pages), pages_size); | |
416 | return ret; | |
417 | } | |
418 | ||
fa8a7094 TH |
419 | /* for explicit first chunk allocator selection */ |
420 | static char pcpu_chosen_alloc[16] __initdata; | |
421 | ||
422 | static int __init percpu_alloc_setup(char *str) | |
423 | { | |
424 | strncpy(pcpu_chosen_alloc, str, sizeof(pcpu_chosen_alloc) - 1); | |
425 | return 0; | |
426 | } | |
427 | early_param("percpu_alloc", percpu_alloc_setup); | |
428 | ||
b2d2f431 BG |
429 | static inline void setup_percpu_segment(int cpu) |
430 | { | |
431 | #ifdef CONFIG_X86_32 | |
432 | struct desc_struct gdt; | |
433 | ||
434 | pack_descriptor(&gdt, per_cpu_offset(cpu), 0xFFFFF, | |
435 | 0x2 | DESCTYPE_S, 0x8); | |
436 | gdt.s = 1; | |
437 | write_gdt_entry(get_cpu_gdt_table(cpu), | |
438 | GDT_ENTRY_PERCPU, &gdt, DESCTYPE_S); | |
439 | #endif | |
440 | } | |
441 | ||
4fe29a85 GOC |
442 | void __init setup_per_cpu_areas(void) |
443 | { | |
5f5d8405 TH |
444 | size_t static_size = __per_cpu_end - __per_cpu_start; |
445 | unsigned int cpu; | |
11124411 TH |
446 | unsigned long delta; |
447 | size_t pcpu_unit_size; | |
5f5d8405 | 448 | ssize_t ret; |
a1681965 | 449 | |
ab14398a | 450 | pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n", |
a1681965 | 451 | NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids); |
11124411 | 452 | |
8ac83757 TH |
453 | /* |
454 | * Allocate percpu area. If PSE is supported, try to make use | |
455 | * of large page mappings. Please read comments on top of | |
456 | * each allocator for details. | |
457 | */ | |
fa8a7094 TH |
458 | ret = -EINVAL; |
459 | if (strlen(pcpu_chosen_alloc)) { | |
460 | if (strcmp(pcpu_chosen_alloc, "4k")) { | |
461 | if (!strcmp(pcpu_chosen_alloc, "lpage")) | |
462 | ret = setup_pcpu_lpage(static_size, true); | |
463 | else if (!strcmp(pcpu_chosen_alloc, "embed")) | |
464 | ret = setup_pcpu_embed(static_size, true); | |
465 | else | |
466 | pr_warning("PERCPU: unknown allocator %s " | |
467 | "specified\n", pcpu_chosen_alloc); | |
468 | if (ret < 0) | |
469 | pr_warning("PERCPU: %s allocator failed (%zd), " | |
470 | "falling back to 4k\n", | |
471 | pcpu_chosen_alloc, ret); | |
472 | } | |
473 | } else { | |
474 | ret = setup_pcpu_lpage(static_size, false); | |
475 | if (ret < 0) | |
476 | ret = setup_pcpu_embed(static_size, false); | |
477 | } | |
89c92151 TH |
478 | if (ret < 0) |
479 | ret = setup_pcpu_4k(static_size); | |
5f5d8405 TH |
480 | if (ret < 0) |
481 | panic("cannot allocate static percpu area (%zu bytes, err=%zd)", | |
482 | static_size, ret); | |
1a51e3a0 | 483 | |
5f5d8405 | 484 | pcpu_unit_size = ret; |
11124411 | 485 | |
5f5d8405 | 486 | /* alrighty, percpu areas up and running */ |
11124411 TH |
487 | delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; |
488 | for_each_possible_cpu(cpu) { | |
489 | per_cpu_offset(cpu) = delta + cpu * pcpu_unit_size; | |
26f80bd6 | 490 | per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu); |
ea927906 | 491 | per_cpu(cpu_number, cpu) = cpu; |
b2d2f431 | 492 | setup_percpu_segment(cpu); |
60a5317f | 493 | setup_stack_canary_segment(cpu); |
0d77e7f0 | 494 | /* |
cf3997f5 TH |
495 | * Copy data used in early init routines from the |
496 | * initial arrays to the per cpu data areas. These | |
497 | * arrays then become expendable and the *_early_ptr's | |
498 | * are zeroed indicating that the static arrays are | |
499 | * gone. | |
0d77e7f0 | 500 | */ |
ec70de8b | 501 | #ifdef CONFIG_X86_LOCAL_APIC |
0d77e7f0 | 502 | per_cpu(x86_cpu_to_apicid, cpu) = |
cf3997f5 | 503 | early_per_cpu_map(x86_cpu_to_apicid, cpu); |
0d77e7f0 | 504 | per_cpu(x86_bios_cpu_apicid, cpu) = |
cf3997f5 | 505 | early_per_cpu_map(x86_bios_cpu_apicid, cpu); |
ec70de8b | 506 | #endif |
1a51e3a0 | 507 | #ifdef CONFIG_X86_64 |
26f80bd6 | 508 | per_cpu(irq_stack_ptr, cpu) = |
cf3997f5 TH |
509 | per_cpu(irq_stack_union.irq_stack, cpu) + |
510 | IRQ_STACK_SIZE - 64; | |
6470aff6 BG |
511 | #ifdef CONFIG_NUMA |
512 | per_cpu(x86_cpu_to_node_map, cpu) = | |
cf3997f5 | 513 | early_per_cpu_map(x86_cpu_to_node_map, cpu); |
2697fbd5 | 514 | #endif |
6470aff6 | 515 | #endif |
1a51e3a0 | 516 | /* |
34019be1 | 517 | * Up to this point, the boot CPU has been using .data.init |
2697fbd5 | 518 | * area. Reload any changed state for the boot CPU. |
1a51e3a0 | 519 | */ |
34019be1 | 520 | if (cpu == boot_cpu_id) |
552be871 | 521 | switch_to_new_gdt(cpu); |
4fe29a85 GOC |
522 | } |
523 | ||
0d77e7f0 | 524 | /* indicate the early static arrays will soon be gone */ |
22f25138 | 525 | #ifdef CONFIG_X86_LOCAL_APIC |
0d77e7f0 BG |
526 | early_per_cpu_ptr(x86_cpu_to_apicid) = NULL; |
527 | early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL; | |
22f25138 | 528 | #endif |
6470aff6 | 529 | #if defined(CONFIG_X86_64) && defined(CONFIG_NUMA) |
0d77e7f0 BG |
530 | early_per_cpu_ptr(x86_cpu_to_node_map) = NULL; |
531 | #endif | |
9f0e8d04 | 532 | |
35d5a9a6 YL |
533 | #if defined(CONFIG_X86_64) && defined(CONFIG_NUMA) |
534 | /* | |
535 | * make sure boot cpu node_number is right, when boot cpu is on the | |
536 | * node that doesn't have mem installed | |
537 | */ | |
538 | per_cpu(node_number, boot_cpu_id) = cpu_to_node(boot_cpu_id); | |
539 | #endif | |
540 | ||
9f248bde MT |
541 | /* Setup node to cpumask map */ |
542 | setup_node_to_cpumask_map(); | |
c2d1cec1 MT |
543 | |
544 | /* Setup cpu initialized, callin, callout masks */ | |
545 | setup_cpu_local_masks(); | |
4fe29a85 | 546 | } |