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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/x86_64/mm/init.c | |
3 | * | |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * Copyright (C) 2000 Pavel Machek <pavel@suse.cz> | |
6 | * Copyright (C) 2002,2003 Andi Kleen <ak@suse.de> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/signal.h> |
10 | #include <linux/sched.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/ptrace.h> | |
16 | #include <linux/mman.h> | |
17 | #include <linux/mm.h> | |
18 | #include <linux/swap.h> | |
19 | #include <linux/smp.h> | |
20 | #include <linux/init.h> | |
11034d55 | 21 | #include <linux/initrd.h> |
1da177e4 LT |
22 | #include <linux/pagemap.h> |
23 | #include <linux/bootmem.h> | |
a9ce6bc1 | 24 | #include <linux/memblock.h> |
1da177e4 | 25 | #include <linux/proc_fs.h> |
59170891 | 26 | #include <linux/pci.h> |
6fb14755 | 27 | #include <linux/pfn.h> |
c9cf5528 | 28 | #include <linux/poison.h> |
17a941d8 | 29 | #include <linux/dma-mapping.h> |
44df75e6 MT |
30 | #include <linux/module.h> |
31 | #include <linux/memory_hotplug.h> | |
ae32b129 | 32 | #include <linux/nmi.h> |
5a0e3ad6 | 33 | #include <linux/gfp.h> |
1da177e4 LT |
34 | |
35 | #include <asm/processor.h> | |
46eaa670 | 36 | #include <asm/bios_ebda.h> |
1da177e4 LT |
37 | #include <asm/system.h> |
38 | #include <asm/uaccess.h> | |
39 | #include <asm/pgtable.h> | |
40 | #include <asm/pgalloc.h> | |
41 | #include <asm/dma.h> | |
42 | #include <asm/fixmap.h> | |
43 | #include <asm/e820.h> | |
44 | #include <asm/apic.h> | |
45 | #include <asm/tlb.h> | |
46 | #include <asm/mmu_context.h> | |
47 | #include <asm/proto.h> | |
48 | #include <asm/smp.h> | |
2bc0414e | 49 | #include <asm/sections.h> |
718fc13b | 50 | #include <asm/kdebug.h> |
aaa64e04 | 51 | #include <asm/numa.h> |
7bfeab9a | 52 | #include <asm/cacheflush.h> |
4fcb2083 | 53 | #include <asm/init.h> |
ea085417 | 54 | #include <linux/bootmem.h> |
1da177e4 | 55 | |
e18c6874 AK |
56 | static unsigned long dma_reserve __initdata; |
57 | ||
00d1c5e0 IM |
58 | static int __init parse_direct_gbpages_off(char *arg) |
59 | { | |
60 | direct_gbpages = 0; | |
61 | return 0; | |
62 | } | |
63 | early_param("nogbpages", parse_direct_gbpages_off); | |
64 | ||
65 | static int __init parse_direct_gbpages_on(char *arg) | |
66 | { | |
67 | direct_gbpages = 1; | |
68 | return 0; | |
69 | } | |
70 | early_param("gbpages", parse_direct_gbpages_on); | |
71 | ||
1da177e4 LT |
72 | /* |
73 | * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the | |
74 | * physical space so we can cache the place of the first one and move | |
75 | * around without checking the pgd every time. | |
76 | */ | |
77 | ||
be43d728 | 78 | pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP; |
bd220a24 YL |
79 | EXPORT_SYMBOL_GPL(__supported_pte_mask); |
80 | ||
bd220a24 YL |
81 | int force_personality32; |
82 | ||
deed05b7 IM |
83 | /* |
84 | * noexec32=on|off | |
85 | * Control non executable heap for 32bit processes. | |
86 | * To control the stack too use noexec=off | |
87 | * | |
88 | * on PROT_READ does not imply PROT_EXEC for 32-bit processes (default) | |
89 | * off PROT_READ implies PROT_EXEC | |
90 | */ | |
bd220a24 YL |
91 | static int __init nonx32_setup(char *str) |
92 | { | |
93 | if (!strcmp(str, "on")) | |
94 | force_personality32 &= ~READ_IMPLIES_EXEC; | |
95 | else if (!strcmp(str, "off")) | |
96 | force_personality32 |= READ_IMPLIES_EXEC; | |
97 | return 1; | |
98 | } | |
99 | __setup("noexec32=", nonx32_setup); | |
100 | ||
8d6ea967 MS |
101 | /* |
102 | * NOTE: This function is marked __ref because it calls __init function | |
103 | * (alloc_bootmem_pages). It's safe to do it ONLY when after_bootmem == 0. | |
104 | */ | |
105 | static __ref void *spp_getpage(void) | |
14a62c34 | 106 | { |
1da177e4 | 107 | void *ptr; |
14a62c34 | 108 | |
1da177e4 | 109 | if (after_bootmem) |
9e730237 | 110 | ptr = (void *) get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK); |
1da177e4 LT |
111 | else |
112 | ptr = alloc_bootmem_pages(PAGE_SIZE); | |
14a62c34 TG |
113 | |
114 | if (!ptr || ((unsigned long)ptr & ~PAGE_MASK)) { | |
115 | panic("set_pte_phys: cannot allocate page data %s\n", | |
116 | after_bootmem ? "after bootmem" : ""); | |
117 | } | |
1da177e4 | 118 | |
10f22dde | 119 | pr_debug("spp_getpage %p\n", ptr); |
14a62c34 | 120 | |
1da177e4 | 121 | return ptr; |
14a62c34 | 122 | } |
1da177e4 | 123 | |
f254f390 | 124 | static pud_t *fill_pud(pgd_t *pgd, unsigned long vaddr) |
1da177e4 | 125 | { |
458a3e64 TH |
126 | if (pgd_none(*pgd)) { |
127 | pud_t *pud = (pud_t *)spp_getpage(); | |
128 | pgd_populate(&init_mm, pgd, pud); | |
129 | if (pud != pud_offset(pgd, 0)) | |
130 | printk(KERN_ERR "PAGETABLE BUG #00! %p <-> %p\n", | |
131 | pud, pud_offset(pgd, 0)); | |
132 | } | |
133 | return pud_offset(pgd, vaddr); | |
134 | } | |
1da177e4 | 135 | |
f254f390 | 136 | static pmd_t *fill_pmd(pud_t *pud, unsigned long vaddr) |
458a3e64 | 137 | { |
1da177e4 | 138 | if (pud_none(*pud)) { |
458a3e64 | 139 | pmd_t *pmd = (pmd_t *) spp_getpage(); |
bb23e403 | 140 | pud_populate(&init_mm, pud, pmd); |
458a3e64 | 141 | if (pmd != pmd_offset(pud, 0)) |
10f22dde | 142 | printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n", |
458a3e64 | 143 | pmd, pmd_offset(pud, 0)); |
1da177e4 | 144 | } |
458a3e64 TH |
145 | return pmd_offset(pud, vaddr); |
146 | } | |
147 | ||
f254f390 | 148 | static pte_t *fill_pte(pmd_t *pmd, unsigned long vaddr) |
458a3e64 | 149 | { |
1da177e4 | 150 | if (pmd_none(*pmd)) { |
458a3e64 | 151 | pte_t *pte = (pte_t *) spp_getpage(); |
bb23e403 | 152 | pmd_populate_kernel(&init_mm, pmd, pte); |
458a3e64 | 153 | if (pte != pte_offset_kernel(pmd, 0)) |
10f22dde | 154 | printk(KERN_ERR "PAGETABLE BUG #02!\n"); |
1da177e4 | 155 | } |
458a3e64 TH |
156 | return pte_offset_kernel(pmd, vaddr); |
157 | } | |
158 | ||
159 | void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte) | |
160 | { | |
161 | pud_t *pud; | |
162 | pmd_t *pmd; | |
163 | pte_t *pte; | |
164 | ||
165 | pud = pud_page + pud_index(vaddr); | |
166 | pmd = fill_pmd(pud, vaddr); | |
167 | pte = fill_pte(pmd, vaddr); | |
1da177e4 | 168 | |
1da177e4 LT |
169 | set_pte(pte, new_pte); |
170 | ||
171 | /* | |
172 | * It's enough to flush this one mapping. | |
173 | * (PGE mappings get flushed as well) | |
174 | */ | |
175 | __flush_tlb_one(vaddr); | |
176 | } | |
177 | ||
458a3e64 | 178 | void set_pte_vaddr(unsigned long vaddr, pte_t pteval) |
0814e0ba EH |
179 | { |
180 | pgd_t *pgd; | |
181 | pud_t *pud_page; | |
182 | ||
183 | pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(pteval)); | |
184 | ||
185 | pgd = pgd_offset_k(vaddr); | |
186 | if (pgd_none(*pgd)) { | |
187 | printk(KERN_ERR | |
188 | "PGD FIXMAP MISSING, it should be setup in head.S!\n"); | |
189 | return; | |
190 | } | |
191 | pud_page = (pud_t*)pgd_page_vaddr(*pgd); | |
192 | set_pte_vaddr_pud(pud_page, vaddr, pteval); | |
193 | } | |
194 | ||
458a3e64 | 195 | pmd_t * __init populate_extra_pmd(unsigned long vaddr) |
11124411 TH |
196 | { |
197 | pgd_t *pgd; | |
198 | pud_t *pud; | |
199 | ||
200 | pgd = pgd_offset_k(vaddr); | |
458a3e64 TH |
201 | pud = fill_pud(pgd, vaddr); |
202 | return fill_pmd(pud, vaddr); | |
203 | } | |
204 | ||
205 | pte_t * __init populate_extra_pte(unsigned long vaddr) | |
206 | { | |
207 | pmd_t *pmd; | |
11124411 | 208 | |
458a3e64 TH |
209 | pmd = populate_extra_pmd(vaddr); |
210 | return fill_pte(pmd, vaddr); | |
11124411 TH |
211 | } |
212 | ||
3a9e189d JS |
213 | /* |
214 | * Create large page table mappings for a range of physical addresses. | |
215 | */ | |
216 | static void __init __init_extra_mapping(unsigned long phys, unsigned long size, | |
217 | pgprot_t prot) | |
218 | { | |
219 | pgd_t *pgd; | |
220 | pud_t *pud; | |
221 | pmd_t *pmd; | |
222 | ||
223 | BUG_ON((phys & ~PMD_MASK) || (size & ~PMD_MASK)); | |
224 | for (; size; phys += PMD_SIZE, size -= PMD_SIZE) { | |
225 | pgd = pgd_offset_k((unsigned long)__va(phys)); | |
226 | if (pgd_none(*pgd)) { | |
227 | pud = (pud_t *) spp_getpage(); | |
228 | set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE | | |
229 | _PAGE_USER)); | |
230 | } | |
231 | pud = pud_offset(pgd, (unsigned long)__va(phys)); | |
232 | if (pud_none(*pud)) { | |
233 | pmd = (pmd_t *) spp_getpage(); | |
234 | set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | | |
235 | _PAGE_USER)); | |
236 | } | |
237 | pmd = pmd_offset(pud, phys); | |
238 | BUG_ON(!pmd_none(*pmd)); | |
239 | set_pmd(pmd, __pmd(phys | pgprot_val(prot))); | |
240 | } | |
241 | } | |
242 | ||
243 | void __init init_extra_mapping_wb(unsigned long phys, unsigned long size) | |
244 | { | |
245 | __init_extra_mapping(phys, size, PAGE_KERNEL_LARGE); | |
246 | } | |
247 | ||
248 | void __init init_extra_mapping_uc(unsigned long phys, unsigned long size) | |
249 | { | |
250 | __init_extra_mapping(phys, size, PAGE_KERNEL_LARGE_NOCACHE); | |
251 | } | |
252 | ||
31eedd82 | 253 | /* |
88f3aec7 IM |
254 | * The head.S code sets up the kernel high mapping: |
255 | * | |
256 | * from __START_KERNEL_map to __START_KERNEL_map + size (== _end-_text) | |
31eedd82 TG |
257 | * |
258 | * phys_addr holds the negative offset to the kernel, which is added | |
259 | * to the compile time generated pmds. This results in invalid pmds up | |
260 | * to the point where we hit the physaddr 0 mapping. | |
261 | * | |
262 | * We limit the mappings to the region from _text to _end. _end is | |
263 | * rounded up to the 2MB boundary. This catches the invalid pmds as | |
264 | * well, as they are located before _text: | |
265 | */ | |
266 | void __init cleanup_highmap(void) | |
267 | { | |
268 | unsigned long vaddr = __START_KERNEL_map; | |
d86bb0da | 269 | unsigned long end = roundup((unsigned long)_end, PMD_SIZE) - 1; |
31eedd82 TG |
270 | pmd_t *pmd = level2_kernel_pgt; |
271 | pmd_t *last_pmd = pmd + PTRS_PER_PMD; | |
272 | ||
273 | for (; pmd < last_pmd; pmd++, vaddr += PMD_SIZE) { | |
2884f110 | 274 | if (pmd_none(*pmd)) |
31eedd82 TG |
275 | continue; |
276 | if (vaddr < (unsigned long) _text || vaddr > end) | |
277 | set_pmd(pmd, __pmd(0)); | |
278 | } | |
279 | } | |
280 | ||
9482ac6e | 281 | static __ref void *alloc_low_page(unsigned long *phys) |
14a62c34 | 282 | { |
298af9d8 | 283 | unsigned long pfn = e820_table_end++; |
1da177e4 LT |
284 | void *adr; |
285 | ||
44df75e6 | 286 | if (after_bootmem) { |
9e730237 | 287 | adr = (void *)get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK); |
44df75e6 | 288 | *phys = __pa(adr); |
14a62c34 | 289 | |
44df75e6 MT |
290 | return adr; |
291 | } | |
292 | ||
298af9d8 | 293 | if (pfn >= e820_table_top) |
14a62c34 | 294 | panic("alloc_low_page: ran out of memory"); |
dafe41ee | 295 | |
14941779 | 296 | adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE); |
44df75e6 | 297 | memset(adr, 0, PAGE_SIZE); |
dafe41ee VG |
298 | *phys = pfn * PAGE_SIZE; |
299 | return adr; | |
300 | } | |
1da177e4 | 301 | |
9482ac6e | 302 | static __ref void unmap_low_page(void *adr) |
14a62c34 | 303 | { |
44df75e6 MT |
304 | if (after_bootmem) |
305 | return; | |
306 | ||
dafe41ee | 307 | early_iounmap(adr, PAGE_SIZE); |
14a62c34 | 308 | } |
1da177e4 | 309 | |
7b16eb89 | 310 | static unsigned long __meminit |
b27a43c1 SS |
311 | phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end, |
312 | pgprot_t prot) | |
4f9c11dd JF |
313 | { |
314 | unsigned pages = 0; | |
7b16eb89 | 315 | unsigned long last_map_addr = end; |
4f9c11dd | 316 | int i; |
7b16eb89 | 317 | |
4f9c11dd JF |
318 | pte_t *pte = pte_page + pte_index(addr); |
319 | ||
320 | for(i = pte_index(addr); i < PTRS_PER_PTE; i++, addr += PAGE_SIZE, pte++) { | |
321 | ||
322 | if (addr >= end) { | |
323 | if (!after_bootmem) { | |
324 | for(; i < PTRS_PER_PTE; i++, pte++) | |
325 | set_pte(pte, __pte(0)); | |
326 | } | |
327 | break; | |
328 | } | |
329 | ||
b27a43c1 SS |
330 | /* |
331 | * We will re-use the existing mapping. | |
332 | * Xen for example has some special requirements, like mapping | |
333 | * pagetable pages as RO. So assume someone who pre-setup | |
334 | * these mappings are more intelligent. | |
335 | */ | |
3afa3949 YL |
336 | if (pte_val(*pte)) { |
337 | pages++; | |
4f9c11dd | 338 | continue; |
3afa3949 | 339 | } |
4f9c11dd JF |
340 | |
341 | if (0) | |
342 | printk(" pte=%p addr=%lx pte=%016lx\n", | |
343 | pte, addr, pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL).pte); | |
4f9c11dd | 344 | pages++; |
b27a43c1 | 345 | set_pte(pte, pfn_pte(addr >> PAGE_SHIFT, prot)); |
7b16eb89 | 346 | last_map_addr = (addr & PAGE_MASK) + PAGE_SIZE; |
4f9c11dd | 347 | } |
a2699e47 | 348 | |
4f9c11dd | 349 | update_page_count(PG_LEVEL_4K, pages); |
7b16eb89 YL |
350 | |
351 | return last_map_addr; | |
4f9c11dd JF |
352 | } |
353 | ||
7b16eb89 | 354 | static unsigned long __meminit |
b27a43c1 SS |
355 | phys_pte_update(pmd_t *pmd, unsigned long address, unsigned long end, |
356 | pgprot_t prot) | |
4f9c11dd JF |
357 | { |
358 | pte_t *pte = (pte_t *)pmd_page_vaddr(*pmd); | |
359 | ||
b27a43c1 | 360 | return phys_pte_init(pte, address, end, prot); |
4f9c11dd JF |
361 | } |
362 | ||
cc615032 | 363 | static unsigned long __meminit |
b50efd2a | 364 | phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end, |
b27a43c1 | 365 | unsigned long page_size_mask, pgprot_t prot) |
44df75e6 | 366 | { |
ce0c0e50 | 367 | unsigned long pages = 0; |
7b16eb89 | 368 | unsigned long last_map_addr = end; |
ce0c0e50 | 369 | |
6ad91658 | 370 | int i = pmd_index(address); |
44df75e6 | 371 | |
6ad91658 | 372 | for (; i < PTRS_PER_PMD; i++, address += PMD_SIZE) { |
4f9c11dd | 373 | unsigned long pte_phys; |
6ad91658 | 374 | pmd_t *pmd = pmd_page + pmd_index(address); |
4f9c11dd | 375 | pte_t *pte; |
b27a43c1 | 376 | pgprot_t new_prot = prot; |
44df75e6 | 377 | |
5f51e139 | 378 | if (address >= end) { |
14a62c34 | 379 | if (!after_bootmem) { |
5f51e139 JB |
380 | for (; i < PTRS_PER_PMD; i++, pmd++) |
381 | set_pmd(pmd, __pmd(0)); | |
14a62c34 | 382 | } |
44df75e6 MT |
383 | break; |
384 | } | |
6ad91658 | 385 | |
4f9c11dd | 386 | if (pmd_val(*pmd)) { |
8ae3a5a8 JB |
387 | if (!pmd_large(*pmd)) { |
388 | spin_lock(&init_mm.page_table_lock); | |
7b16eb89 | 389 | last_map_addr = phys_pte_update(pmd, address, |
b27a43c1 | 390 | end, prot); |
8ae3a5a8 | 391 | spin_unlock(&init_mm.page_table_lock); |
a2699e47 | 392 | continue; |
8ae3a5a8 | 393 | } |
b27a43c1 SS |
394 | /* |
395 | * If we are ok with PG_LEVEL_2M mapping, then we will | |
396 | * use the existing mapping, | |
397 | * | |
398 | * Otherwise, we will split the large page mapping but | |
399 | * use the same existing protection bits except for | |
400 | * large page, so that we don't violate Intel's TLB | |
401 | * Application note (317080) which says, while changing | |
402 | * the page sizes, new and old translations should | |
403 | * not differ with respect to page frame and | |
404 | * attributes. | |
405 | */ | |
3afa3949 YL |
406 | if (page_size_mask & (1 << PG_LEVEL_2M)) { |
407 | pages++; | |
b27a43c1 | 408 | continue; |
3afa3949 | 409 | } |
b27a43c1 | 410 | new_prot = pte_pgprot(pte_clrhuge(*(pte_t *)pmd)); |
4f9c11dd JF |
411 | } |
412 | ||
b50efd2a | 413 | if (page_size_mask & (1<<PG_LEVEL_2M)) { |
4f9c11dd | 414 | pages++; |
8ae3a5a8 | 415 | spin_lock(&init_mm.page_table_lock); |
4f9c11dd | 416 | set_pte((pte_t *)pmd, |
b27a43c1 SS |
417 | pfn_pte(address >> PAGE_SHIFT, |
418 | __pgprot(pgprot_val(prot) | _PAGE_PSE))); | |
8ae3a5a8 | 419 | spin_unlock(&init_mm.page_table_lock); |
7b16eb89 | 420 | last_map_addr = (address & PMD_MASK) + PMD_SIZE; |
6ad91658 | 421 | continue; |
4f9c11dd | 422 | } |
6ad91658 | 423 | |
4f9c11dd | 424 | pte = alloc_low_page(&pte_phys); |
b27a43c1 | 425 | last_map_addr = phys_pte_init(pte, address, end, new_prot); |
4f9c11dd JF |
426 | unmap_low_page(pte); |
427 | ||
8ae3a5a8 | 428 | spin_lock(&init_mm.page_table_lock); |
4f9c11dd | 429 | pmd_populate_kernel(&init_mm, pmd, __va(pte_phys)); |
8ae3a5a8 | 430 | spin_unlock(&init_mm.page_table_lock); |
44df75e6 | 431 | } |
ce0c0e50 | 432 | update_page_count(PG_LEVEL_2M, pages); |
7b16eb89 | 433 | return last_map_addr; |
44df75e6 MT |
434 | } |
435 | ||
cc615032 | 436 | static unsigned long __meminit |
b50efd2a | 437 | phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end, |
b27a43c1 | 438 | unsigned long page_size_mask, pgprot_t prot) |
44df75e6 | 439 | { |
14a62c34 | 440 | pmd_t *pmd = pmd_offset(pud, 0); |
cc615032 AK |
441 | unsigned long last_map_addr; |
442 | ||
b27a43c1 | 443 | last_map_addr = phys_pmd_init(pmd, address, end, page_size_mask, prot); |
6ad91658 | 444 | __flush_tlb_all(); |
cc615032 | 445 | return last_map_addr; |
44df75e6 MT |
446 | } |
447 | ||
cc615032 | 448 | static unsigned long __meminit |
b50efd2a YL |
449 | phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end, |
450 | unsigned long page_size_mask) | |
14a62c34 | 451 | { |
ce0c0e50 | 452 | unsigned long pages = 0; |
cc615032 | 453 | unsigned long last_map_addr = end; |
6ad91658 | 454 | int i = pud_index(addr); |
44df75e6 | 455 | |
14a62c34 | 456 | for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE) { |
6ad91658 KM |
457 | unsigned long pmd_phys; |
458 | pud_t *pud = pud_page + pud_index(addr); | |
1da177e4 | 459 | pmd_t *pmd; |
b27a43c1 | 460 | pgprot_t prot = PAGE_KERNEL; |
1da177e4 | 461 | |
6ad91658 | 462 | if (addr >= end) |
1da177e4 | 463 | break; |
1da177e4 | 464 | |
14a62c34 TG |
465 | if (!after_bootmem && |
466 | !e820_any_mapped(addr, addr+PUD_SIZE, 0)) { | |
467 | set_pud(pud, __pud(0)); | |
1da177e4 | 468 | continue; |
14a62c34 | 469 | } |
1da177e4 | 470 | |
6ad91658 | 471 | if (pud_val(*pud)) { |
a2699e47 | 472 | if (!pud_large(*pud)) { |
b50efd2a | 473 | last_map_addr = phys_pmd_update(pud, addr, end, |
b27a43c1 | 474 | page_size_mask, prot); |
a2699e47 SS |
475 | continue; |
476 | } | |
b27a43c1 SS |
477 | /* |
478 | * If we are ok with PG_LEVEL_1G mapping, then we will | |
479 | * use the existing mapping. | |
480 | * | |
481 | * Otherwise, we will split the gbpage mapping but use | |
482 | * the same existing protection bits except for large | |
483 | * page, so that we don't violate Intel's TLB | |
484 | * Application note (317080) which says, while changing | |
485 | * the page sizes, new and old translations should | |
486 | * not differ with respect to page frame and | |
487 | * attributes. | |
488 | */ | |
3afa3949 YL |
489 | if (page_size_mask & (1 << PG_LEVEL_1G)) { |
490 | pages++; | |
b27a43c1 | 491 | continue; |
3afa3949 | 492 | } |
b27a43c1 | 493 | prot = pte_pgprot(pte_clrhuge(*(pte_t *)pud)); |
ef925766 AK |
494 | } |
495 | ||
b50efd2a | 496 | if (page_size_mask & (1<<PG_LEVEL_1G)) { |
ce0c0e50 | 497 | pages++; |
8ae3a5a8 | 498 | spin_lock(&init_mm.page_table_lock); |
ef925766 AK |
499 | set_pte((pte_t *)pud, |
500 | pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE)); | |
8ae3a5a8 | 501 | spin_unlock(&init_mm.page_table_lock); |
cc615032 | 502 | last_map_addr = (addr & PUD_MASK) + PUD_SIZE; |
6ad91658 KM |
503 | continue; |
504 | } | |
505 | ||
dafe41ee | 506 | pmd = alloc_low_page(&pmd_phys); |
b27a43c1 SS |
507 | last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask, |
508 | prot); | |
4f9c11dd | 509 | unmap_low_page(pmd); |
8ae3a5a8 JB |
510 | |
511 | spin_lock(&init_mm.page_table_lock); | |
4f9c11dd | 512 | pud_populate(&init_mm, pud, __va(pmd_phys)); |
44df75e6 | 513 | spin_unlock(&init_mm.page_table_lock); |
1da177e4 | 514 | } |
1a2b4412 | 515 | __flush_tlb_all(); |
a2699e47 | 516 | |
ce0c0e50 | 517 | update_page_count(PG_LEVEL_1G, pages); |
cc615032 | 518 | |
1a0db38e | 519 | return last_map_addr; |
14a62c34 | 520 | } |
1da177e4 | 521 | |
4f9c11dd | 522 | static unsigned long __meminit |
b50efd2a YL |
523 | phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end, |
524 | unsigned long page_size_mask) | |
4f9c11dd JF |
525 | { |
526 | pud_t *pud; | |
527 | ||
528 | pud = (pud_t *)pgd_page_vaddr(*pgd); | |
529 | ||
b50efd2a | 530 | return phys_pud_init(pud, addr, end, page_size_mask); |
4f9c11dd JF |
531 | } |
532 | ||
41d840e2 | 533 | unsigned long __meminit |
f765090a PE |
534 | kernel_physical_mapping_init(unsigned long start, |
535 | unsigned long end, | |
536 | unsigned long page_size_mask) | |
14a62c34 | 537 | { |
1da177e4 | 538 | |
b50efd2a | 539 | unsigned long next, last_map_addr = end; |
1da177e4 LT |
540 | |
541 | start = (unsigned long)__va(start); | |
542 | end = (unsigned long)__va(end); | |
543 | ||
544 | for (; start < end; start = next) { | |
44df75e6 | 545 | pgd_t *pgd = pgd_offset_k(start); |
14a62c34 | 546 | unsigned long pud_phys; |
44df75e6 MT |
547 | pud_t *pud; |
548 | ||
e22146e6 | 549 | next = (start + PGDIR_SIZE) & PGDIR_MASK; |
4f9c11dd JF |
550 | if (next > end) |
551 | next = end; | |
552 | ||
553 | if (pgd_val(*pgd)) { | |
b50efd2a YL |
554 | last_map_addr = phys_pud_update(pgd, __pa(start), |
555 | __pa(end), page_size_mask); | |
4f9c11dd JF |
556 | continue; |
557 | } | |
558 | ||
8ae3a5a8 | 559 | pud = alloc_low_page(&pud_phys); |
b50efd2a YL |
560 | last_map_addr = phys_pud_init(pud, __pa(start), __pa(next), |
561 | page_size_mask); | |
4f9c11dd | 562 | unmap_low_page(pud); |
8ae3a5a8 JB |
563 | |
564 | spin_lock(&init_mm.page_table_lock); | |
565 | pgd_populate(&init_mm, pgd, __va(pud_phys)); | |
566 | spin_unlock(&init_mm.page_table_lock); | |
14a62c34 | 567 | } |
a2699e47 | 568 | __flush_tlb_all(); |
1da177e4 | 569 | |
b50efd2a YL |
570 | return last_map_addr; |
571 | } | |
7b16eb89 | 572 | |
2b97690f | 573 | #ifndef CONFIG_NUMA |
8ee2debc DR |
574 | void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn, |
575 | int acpi, int k8) | |
1f75d7e3 | 576 | { |
08677214 | 577 | #ifndef CONFIG_NO_BOOTMEM |
1f75d7e3 YL |
578 | unsigned long bootmap_size, bootmap; |
579 | ||
580 | bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT; | |
a9ce6bc1 | 581 | bootmap = memblock_find_in_range(0, end_pfn<<PAGE_SHIFT, bootmap_size, |
1f75d7e3 | 582 | PAGE_SIZE); |
a9ce6bc1 | 583 | if (bootmap == MEMBLOCK_ERROR) |
1f75d7e3 | 584 | panic("Cannot find bootmem map of size %ld\n", bootmap_size); |
a9ce6bc1 | 585 | memblock_x86_reserve_range(bootmap, bootmap + bootmap_size, "BOOTMAP"); |
346cafec YL |
586 | /* don't touch min_low_pfn */ |
587 | bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT, | |
588 | 0, end_pfn); | |
a9ce6bc1 | 589 | memblock_x86_register_active_regions(0, start_pfn, end_pfn); |
1f75d7e3 | 590 | free_bootmem_with_active_regions(0, end_pfn); |
08677214 | 591 | #else |
a9ce6bc1 | 592 | memblock_x86_register_active_regions(0, start_pfn, end_pfn); |
08677214 | 593 | #endif |
1f75d7e3 | 594 | } |
3551f88f | 595 | #endif |
1f75d7e3 | 596 | |
1da177e4 LT |
597 | void __init paging_init(void) |
598 | { | |
6391af17 | 599 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
14a62c34 | 600 | |
6391af17 MG |
601 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
602 | max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; | |
603 | max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; | |
c987d12f | 604 | max_zone_pfns[ZONE_NORMAL] = max_pfn; |
6391af17 | 605 | |
3551f88f | 606 | sparse_memory_present_with_active_regions(MAX_NUMNODES); |
44df75e6 | 607 | sparse_init(); |
44b57280 YL |
608 | |
609 | /* | |
610 | * clear the default setting with node 0 | |
611 | * note: don't use nodes_clear here, that is really clearing when | |
612 | * numa support is not compiled in, and later node_set_state | |
613 | * will not set it back. | |
614 | */ | |
615 | node_clear_state(0, N_NORMAL_MEMORY); | |
616 | ||
5cb248ab | 617 | free_area_init_nodes(max_zone_pfns); |
1da177e4 | 618 | } |
1da177e4 | 619 | |
44df75e6 MT |
620 | /* |
621 | * Memory hotplug specific functions | |
44df75e6 | 622 | */ |
bc02af93 | 623 | #ifdef CONFIG_MEMORY_HOTPLUG |
ea085417 SZ |
624 | /* |
625 | * After memory hotplug the variables max_pfn, max_low_pfn and high_memory need | |
626 | * updating. | |
627 | */ | |
628 | static void update_end_of_memory_vars(u64 start, u64 size) | |
629 | { | |
630 | unsigned long end_pfn = PFN_UP(start + size); | |
631 | ||
632 | if (end_pfn > max_pfn) { | |
633 | max_pfn = end_pfn; | |
634 | max_low_pfn = end_pfn; | |
635 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; | |
636 | } | |
637 | } | |
638 | ||
9d99aaa3 AK |
639 | /* |
640 | * Memory is added always to NORMAL zone. This means you will never get | |
641 | * additional DMA/DMA32 memory. | |
642 | */ | |
bc02af93 | 643 | int arch_add_memory(int nid, u64 start, u64 size) |
44df75e6 | 644 | { |
bc02af93 | 645 | struct pglist_data *pgdat = NODE_DATA(nid); |
776ed98b | 646 | struct zone *zone = pgdat->node_zones + ZONE_NORMAL; |
cc615032 | 647 | unsigned long last_mapped_pfn, start_pfn = start >> PAGE_SHIFT; |
44df75e6 MT |
648 | unsigned long nr_pages = size >> PAGE_SHIFT; |
649 | int ret; | |
650 | ||
60817c9b | 651 | last_mapped_pfn = init_memory_mapping(start, start + size); |
cc615032 AK |
652 | if (last_mapped_pfn > max_pfn_mapped) |
653 | max_pfn_mapped = last_mapped_pfn; | |
45e0b78b | 654 | |
c04fc586 | 655 | ret = __add_pages(nid, zone, start_pfn, nr_pages); |
fe8b868e | 656 | WARN_ON_ONCE(ret); |
44df75e6 | 657 | |
ea085417 SZ |
658 | /* update max_pfn, max_low_pfn and high_memory */ |
659 | update_end_of_memory_vars(start, size); | |
660 | ||
44df75e6 | 661 | return ret; |
44df75e6 | 662 | } |
bc02af93 | 663 | EXPORT_SYMBOL_GPL(arch_add_memory); |
44df75e6 | 664 | |
8243229f | 665 | #if !defined(CONFIG_ACPI_NUMA) && defined(CONFIG_NUMA) |
4942e998 KM |
666 | int memory_add_physaddr_to_nid(u64 start) |
667 | { | |
668 | return 0; | |
669 | } | |
8c2676a5 | 670 | EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); |
4942e998 KM |
671 | #endif |
672 | ||
45e0b78b KM |
673 | #endif /* CONFIG_MEMORY_HOTPLUG */ |
674 | ||
81ac3ad9 | 675 | static struct kcore_list kcore_vsyscall; |
1da177e4 LT |
676 | |
677 | void __init mem_init(void) | |
678 | { | |
0a43e4bf | 679 | long codesize, reservedpages, datasize, initsize; |
11a6b0c9 | 680 | unsigned long absent_pages; |
1da177e4 | 681 | |
0dc243ae | 682 | pci_iommu_alloc(); |
1da177e4 | 683 | |
48ddb154 | 684 | /* clear_bss() already clear the empty_zero_page */ |
1da177e4 LT |
685 | |
686 | reservedpages = 0; | |
687 | ||
688 | /* this will put all low memory onto the freelists */ | |
2b97690f | 689 | #ifdef CONFIG_NUMA |
0a43e4bf | 690 | totalram_pages = numa_free_all_bootmem(); |
1da177e4 | 691 | #else |
0a43e4bf | 692 | totalram_pages = free_all_bootmem(); |
1da177e4 | 693 | #endif |
11a6b0c9 YL |
694 | |
695 | absent_pages = absent_pages_in_range(0, max_pfn); | |
696 | reservedpages = max_pfn - totalram_pages - absent_pages; | |
1da177e4 LT |
697 | after_bootmem = 1; |
698 | ||
699 | codesize = (unsigned long) &_etext - (unsigned long) &_text; | |
700 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
701 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
702 | ||
703 | /* Register memory areas for /proc/kcore */ | |
14a62c34 | 704 | kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START, |
c30bb2a2 | 705 | VSYSCALL_END - VSYSCALL_START, KCORE_OTHER); |
1da177e4 | 706 | |
10f22dde | 707 | printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, " |
11a6b0c9 | 708 | "%ldk absent, %ldk reserved, %ldk data, %ldk init)\n", |
cc013a88 | 709 | nr_free_pages() << (PAGE_SHIFT-10), |
c987d12f | 710 | max_pfn << (PAGE_SHIFT-10), |
1da177e4 | 711 | codesize >> 10, |
11a6b0c9 | 712 | absent_pages << (PAGE_SHIFT-10), |
1da177e4 LT |
713 | reservedpages << (PAGE_SHIFT-10), |
714 | datasize >> 10, | |
715 | initsize >> 10); | |
1da177e4 LT |
716 | } |
717 | ||
67df197b | 718 | #ifdef CONFIG_DEBUG_RODATA |
edeed305 AV |
719 | const int rodata_test_data = 0xC3; |
720 | EXPORT_SYMBOL_GPL(rodata_test_data); | |
67df197b | 721 | |
502f6604 | 722 | int kernel_set_to_readonly; |
16239630 SR |
723 | |
724 | void set_kernel_text_rw(void) | |
725 | { | |
b9af7c0d | 726 | unsigned long start = PFN_ALIGN(_text); |
e7d23dde | 727 | unsigned long end = PFN_ALIGN(__stop___ex_table); |
16239630 SR |
728 | |
729 | if (!kernel_set_to_readonly) | |
730 | return; | |
731 | ||
732 | pr_debug("Set kernel text: %lx - %lx for read write\n", | |
733 | start, end); | |
734 | ||
e7d23dde SS |
735 | /* |
736 | * Make the kernel identity mapping for text RW. Kernel text | |
737 | * mapping will always be RO. Refer to the comment in | |
738 | * static_protections() in pageattr.c | |
739 | */ | |
16239630 SR |
740 | set_memory_rw(start, (end - start) >> PAGE_SHIFT); |
741 | } | |
742 | ||
743 | void set_kernel_text_ro(void) | |
744 | { | |
b9af7c0d | 745 | unsigned long start = PFN_ALIGN(_text); |
e7d23dde | 746 | unsigned long end = PFN_ALIGN(__stop___ex_table); |
16239630 SR |
747 | |
748 | if (!kernel_set_to_readonly) | |
749 | return; | |
750 | ||
751 | pr_debug("Set kernel text: %lx - %lx for read only\n", | |
752 | start, end); | |
753 | ||
e7d23dde SS |
754 | /* |
755 | * Set the kernel identity mapping for text RO. | |
756 | */ | |
16239630 SR |
757 | set_memory_ro(start, (end - start) >> PAGE_SHIFT); |
758 | } | |
759 | ||
67df197b AV |
760 | void mark_rodata_ro(void) |
761 | { | |
74e08179 | 762 | unsigned long start = PFN_ALIGN(_text); |
8f0f996e SR |
763 | unsigned long rodata_start = |
764 | ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK; | |
74e08179 SS |
765 | unsigned long end = (unsigned long) &__end_rodata_hpage_align; |
766 | unsigned long text_end = PAGE_ALIGN((unsigned long) &__stop___ex_table); | |
767 | unsigned long rodata_end = PAGE_ALIGN((unsigned long) &__end_rodata); | |
768 | unsigned long data_start = (unsigned long) &_sdata; | |
8f0f996e | 769 | |
6fb14755 | 770 | printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n", |
e3ebadd9 | 771 | (end - start) >> 10); |
984bb80d AV |
772 | set_memory_ro(start, (end - start) >> PAGE_SHIFT); |
773 | ||
16239630 SR |
774 | kernel_set_to_readonly = 1; |
775 | ||
984bb80d AV |
776 | /* |
777 | * The rodata section (but not the kernel text!) should also be | |
778 | * not-executable. | |
779 | */ | |
72b59d67 | 780 | set_memory_nx(rodata_start, (end - rodata_start) >> PAGE_SHIFT); |
67df197b | 781 | |
1a487252 AV |
782 | rodata_test(); |
783 | ||
0c42f392 | 784 | #ifdef CONFIG_CPA_DEBUG |
10f22dde | 785 | printk(KERN_INFO "Testing CPA: undo %lx-%lx\n", start, end); |
6d238cc4 | 786 | set_memory_rw(start, (end-start) >> PAGE_SHIFT); |
0c42f392 | 787 | |
10f22dde | 788 | printk(KERN_INFO "Testing CPA: again\n"); |
6d238cc4 | 789 | set_memory_ro(start, (end-start) >> PAGE_SHIFT); |
0c42f392 | 790 | #endif |
74e08179 SS |
791 | |
792 | free_init_pages("unused kernel memory", | |
793 | (unsigned long) page_address(virt_to_page(text_end)), | |
794 | (unsigned long) | |
795 | page_address(virt_to_page(rodata_start))); | |
796 | free_init_pages("unused kernel memory", | |
797 | (unsigned long) page_address(virt_to_page(rodata_end)), | |
798 | (unsigned long) page_address(virt_to_page(data_start))); | |
67df197b | 799 | } |
4e4eee0e | 800 | |
67df197b AV |
801 | #endif |
802 | ||
f88eff74 | 803 | #ifndef CONFIG_NO_BOOTMEM |
d2dbf343 YL |
804 | int __init reserve_bootmem_generic(unsigned long phys, unsigned long len, |
805 | int flags) | |
14a62c34 | 806 | { |
5e58a02a | 807 | unsigned long pfn = phys >> PAGE_SHIFT; |
14a62c34 | 808 | |
c987d12f | 809 | if (pfn >= max_pfn) { |
14a62c34 TG |
810 | /* |
811 | * This can happen with kdump kernels when accessing | |
812 | * firmware tables: | |
813 | */ | |
67794292 | 814 | if (pfn < max_pfn_mapped) |
8b2ef1d7 | 815 | return -EFAULT; |
14a62c34 | 816 | |
6a07a0ed | 817 | printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %lu\n", |
5e58a02a | 818 | phys, len); |
8b2ef1d7 | 819 | return -EFAULT; |
5e58a02a AK |
820 | } |
821 | ||
a6a06f7b | 822 | reserve_bootmem(phys, len, flags); |
8b3cd09e | 823 | |
0e0b864e | 824 | if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) { |
e18c6874 | 825 | dma_reserve += len / PAGE_SIZE; |
0e0b864e MG |
826 | set_dma_reserve(dma_reserve); |
827 | } | |
8b2ef1d7 BW |
828 | |
829 | return 0; | |
1da177e4 | 830 | } |
f88eff74 | 831 | #endif |
1da177e4 | 832 | |
14a62c34 TG |
833 | int kern_addr_valid(unsigned long addr) |
834 | { | |
1da177e4 | 835 | unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT; |
14a62c34 TG |
836 | pgd_t *pgd; |
837 | pud_t *pud; | |
838 | pmd_t *pmd; | |
839 | pte_t *pte; | |
1da177e4 LT |
840 | |
841 | if (above != 0 && above != -1UL) | |
14a62c34 TG |
842 | return 0; |
843 | ||
1da177e4 LT |
844 | pgd = pgd_offset_k(addr); |
845 | if (pgd_none(*pgd)) | |
846 | return 0; | |
847 | ||
848 | pud = pud_offset(pgd, addr); | |
849 | if (pud_none(*pud)) | |
14a62c34 | 850 | return 0; |
1da177e4 LT |
851 | |
852 | pmd = pmd_offset(pud, addr); | |
853 | if (pmd_none(*pmd)) | |
854 | return 0; | |
14a62c34 | 855 | |
1da177e4 LT |
856 | if (pmd_large(*pmd)) |
857 | return pfn_valid(pmd_pfn(*pmd)); | |
858 | ||
859 | pte = pte_offset_kernel(pmd, addr); | |
860 | if (pte_none(*pte)) | |
861 | return 0; | |
14a62c34 | 862 | |
1da177e4 LT |
863 | return pfn_valid(pte_pfn(*pte)); |
864 | } | |
865 | ||
14a62c34 TG |
866 | /* |
867 | * A pseudo VMA to allow ptrace access for the vsyscall page. This only | |
868 | * covers the 64bit vsyscall page now. 32bit has a real VMA now and does | |
869 | * not need special handling anymore: | |
870 | */ | |
1da177e4 | 871 | static struct vm_area_struct gate_vma = { |
14a62c34 TG |
872 | .vm_start = VSYSCALL_START, |
873 | .vm_end = VSYSCALL_START + (VSYSCALL_MAPPED_PAGES * PAGE_SIZE), | |
874 | .vm_page_prot = PAGE_READONLY_EXEC, | |
875 | .vm_flags = VM_READ | VM_EXEC | |
1da177e4 LT |
876 | }; |
877 | ||
1da177e4 LT |
878 | struct vm_area_struct *get_gate_vma(struct task_struct *tsk) |
879 | { | |
880 | #ifdef CONFIG_IA32_EMULATION | |
1e014410 AK |
881 | if (test_tsk_thread_flag(tsk, TIF_IA32)) |
882 | return NULL; | |
1da177e4 LT |
883 | #endif |
884 | return &gate_vma; | |
885 | } | |
886 | ||
887 | int in_gate_area(struct task_struct *task, unsigned long addr) | |
888 | { | |
889 | struct vm_area_struct *vma = get_gate_vma(task); | |
14a62c34 | 890 | |
1e014410 AK |
891 | if (!vma) |
892 | return 0; | |
14a62c34 | 893 | |
1da177e4 LT |
894 | return (addr >= vma->vm_start) && (addr < vma->vm_end); |
895 | } | |
896 | ||
14a62c34 TG |
897 | /* |
898 | * Use this when you have no reliable task/vma, typically from interrupt | |
899 | * context. It is less reliable than using the task's vma and may give | |
900 | * false positives: | |
1da177e4 LT |
901 | */ |
902 | int in_gate_area_no_task(unsigned long addr) | |
903 | { | |
1e014410 | 904 | return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END); |
1da177e4 | 905 | } |
2e1c49db | 906 | |
2aae950b AK |
907 | const char *arch_vma_name(struct vm_area_struct *vma) |
908 | { | |
909 | if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso) | |
910 | return "[vdso]"; | |
911 | if (vma == &gate_vma) | |
912 | return "[vsyscall]"; | |
913 | return NULL; | |
914 | } | |
0889eba5 CL |
915 | |
916 | #ifdef CONFIG_SPARSEMEM_VMEMMAP | |
917 | /* | |
918 | * Initialise the sparsemem vmemmap using huge-pages at the PMD level. | |
919 | */ | |
c2b91e2e YL |
920 | static long __meminitdata addr_start, addr_end; |
921 | static void __meminitdata *p_start, *p_end; | |
922 | static int __meminitdata node_start; | |
923 | ||
14a62c34 TG |
924 | int __meminit |
925 | vmemmap_populate(struct page *start_page, unsigned long size, int node) | |
0889eba5 CL |
926 | { |
927 | unsigned long addr = (unsigned long)start_page; | |
928 | unsigned long end = (unsigned long)(start_page + size); | |
929 | unsigned long next; | |
930 | pgd_t *pgd; | |
931 | pud_t *pud; | |
932 | pmd_t *pmd; | |
933 | ||
934 | for (; addr < end; addr = next) { | |
7c934d39 | 935 | void *p = NULL; |
0889eba5 CL |
936 | |
937 | pgd = vmemmap_pgd_populate(addr, node); | |
938 | if (!pgd) | |
939 | return -ENOMEM; | |
14a62c34 | 940 | |
0889eba5 CL |
941 | pud = vmemmap_pud_populate(pgd, addr, node); |
942 | if (!pud) | |
943 | return -ENOMEM; | |
944 | ||
7c934d39 JF |
945 | if (!cpu_has_pse) { |
946 | next = (addr + PAGE_SIZE) & PAGE_MASK; | |
947 | pmd = vmemmap_pmd_populate(pud, addr, node); | |
948 | ||
949 | if (!pmd) | |
950 | return -ENOMEM; | |
951 | ||
952 | p = vmemmap_pte_populate(pmd, addr, node); | |
14a62c34 | 953 | |
0889eba5 CL |
954 | if (!p) |
955 | return -ENOMEM; | |
956 | ||
7c934d39 JF |
957 | addr_end = addr + PAGE_SIZE; |
958 | p_end = p + PAGE_SIZE; | |
14a62c34 | 959 | } else { |
7c934d39 JF |
960 | next = pmd_addr_end(addr, end); |
961 | ||
962 | pmd = pmd_offset(pud, addr); | |
963 | if (pmd_none(*pmd)) { | |
964 | pte_t entry; | |
965 | ||
9bdac914 | 966 | p = vmemmap_alloc_block_buf(PMD_SIZE, node); |
7c934d39 JF |
967 | if (!p) |
968 | return -ENOMEM; | |
969 | ||
970 | entry = pfn_pte(__pa(p) >> PAGE_SHIFT, | |
971 | PAGE_KERNEL_LARGE); | |
972 | set_pmd(pmd, __pmd(pte_val(entry))); | |
973 | ||
7c934d39 JF |
974 | /* check to see if we have contiguous blocks */ |
975 | if (p_end != p || node_start != node) { | |
976 | if (p_start) | |
977 | printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n", | |
978 | addr_start, addr_end-1, p_start, p_end-1, node_start); | |
979 | addr_start = addr; | |
980 | node_start = node; | |
981 | p_start = p; | |
982 | } | |
49c980df YL |
983 | |
984 | addr_end = addr + PMD_SIZE; | |
985 | p_end = p + PMD_SIZE; | |
7c934d39 JF |
986 | } else |
987 | vmemmap_verify((pte_t *)pmd, node, addr, next); | |
14a62c34 | 988 | } |
7c934d39 | 989 | |
0889eba5 | 990 | } |
0889eba5 CL |
991 | return 0; |
992 | } | |
c2b91e2e YL |
993 | |
994 | void __meminit vmemmap_populate_print_last(void) | |
995 | { | |
996 | if (p_start) { | |
997 | printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n", | |
998 | addr_start, addr_end-1, p_start, p_end-1, node_start); | |
999 | p_start = NULL; | |
1000 | p_end = NULL; | |
1001 | node_start = 0; | |
1002 | } | |
1003 | } | |
0889eba5 | 1004 | #endif |