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1965aae3 PA |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
6c386655 | 3 | |
c47c1b1f | 4 | #include <asm/page.h> |
1adcaafe | 5 | #include <asm/e820.h> |
c47c1b1f | 6 | |
8d19c99f | 7 | #include <asm/pgtable_types.h> |
b2bc2731 | 8 | |
8a7b12f7 | 9 | /* |
10 | * Macro to mark a page protection value as UC- | |
11 | */ | |
12 | #define pgprot_noncached(prot) \ | |
13 | ((boot_cpu_data.x86 > 3) \ | |
14 | ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ | |
15 | : (prot)) | |
16 | ||
4614139c | 17 | #ifndef __ASSEMBLY__ |
55a6ca25 PA |
18 | #include <asm/x86_init.h> |
19 | ||
ef6bea6d BP |
20 | void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd); |
21 | ||
8405b122 JF |
22 | /* |
23 | * ZERO_PAGE is a global shared page that is always zero: used | |
24 | * for zero-mapped memory areas etc.. | |
25 | */ | |
277d5b40 AK |
26 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] |
27 | __visible; | |
8405b122 JF |
28 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
29 | ||
e3ed910d JF |
30 | extern spinlock_t pgd_lock; |
31 | extern struct list_head pgd_list; | |
8405b122 | 32 | |
617d34d9 JF |
33 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
34 | ||
54321d94 JF |
35 | #ifdef CONFIG_PARAVIRT |
36 | #include <asm/paravirt.h> | |
37 | #else /* !CONFIG_PARAVIRT */ | |
38 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
39 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
2609ae6d | 40 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
54321d94 | 41 | |
54321d94 JF |
42 | #define set_pte_atomic(ptep, pte) \ |
43 | native_set_pte_atomic(ptep, pte) | |
44 | ||
45 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
46 | ||
47 | #ifndef __PAGETABLE_PUD_FOLDED | |
48 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
49 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
50 | #endif | |
51 | ||
52 | #ifndef set_pud | |
53 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
54 | #endif | |
55 | ||
56 | #ifndef __PAGETABLE_PMD_FOLDED | |
57 | #define pud_clear(pud) native_pud_clear(pud) | |
58 | #endif | |
59 | ||
60 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
61 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
62 | ||
63 | #define pte_update(mm, addr, ptep) do { } while (0) | |
64 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
2609ae6d AA |
65 | #define pmd_update(mm, addr, ptep) do { } while (0) |
66 | #define pmd_update_defer(mm, addr, ptep) do { } while (0) | |
54321d94 | 67 | |
54321d94 JF |
68 | #define pgd_val(x) native_pgd_val(x) |
69 | #define __pgd(x) native_make_pgd(x) | |
70 | ||
71 | #ifndef __PAGETABLE_PUD_FOLDED | |
72 | #define pud_val(x) native_pud_val(x) | |
73 | #define __pud(x) native_make_pud(x) | |
74 | #endif | |
75 | ||
76 | #ifndef __PAGETABLE_PMD_FOLDED | |
77 | #define pmd_val(x) native_pmd_val(x) | |
78 | #define __pmd(x) native_make_pmd(x) | |
79 | #endif | |
80 | ||
81 | #define pte_val(x) native_pte_val(x) | |
82 | #define __pte(x) native_make_pte(x) | |
83 | ||
224101ed JF |
84 | #define arch_end_context_switch(prev) do {} while(0) |
85 | ||
54321d94 JF |
86 | #endif /* CONFIG_PARAVIRT */ |
87 | ||
4614139c JF |
88 | /* |
89 | * The following only work if pte_present() is true. | |
90 | * Undefined behaviour if not.. | |
91 | */ | |
3cbaeafe JP |
92 | static inline int pte_dirty(pte_t pte) |
93 | { | |
a15af1c9 | 94 | return pte_flags(pte) & _PAGE_DIRTY; |
3cbaeafe JP |
95 | } |
96 | ||
97 | static inline int pte_young(pte_t pte) | |
98 | { | |
a15af1c9 | 99 | return pte_flags(pte) & _PAGE_ACCESSED; |
3cbaeafe JP |
100 | } |
101 | ||
f2d6bfe9 JW |
102 | static inline int pmd_young(pmd_t pmd) |
103 | { | |
104 | return pmd_flags(pmd) & _PAGE_ACCESSED; | |
105 | } | |
106 | ||
3cbaeafe JP |
107 | static inline int pte_write(pte_t pte) |
108 | { | |
a15af1c9 | 109 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
110 | } |
111 | ||
112 | static inline int pte_file(pte_t pte) | |
113 | { | |
a15af1c9 | 114 | return pte_flags(pte) & _PAGE_FILE; |
3cbaeafe JP |
115 | } |
116 | ||
117 | static inline int pte_huge(pte_t pte) | |
118 | { | |
a15af1c9 | 119 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
120 | } |
121 | ||
3cbaeafe JP |
122 | static inline int pte_global(pte_t pte) |
123 | { | |
a15af1c9 | 124 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
125 | } |
126 | ||
127 | static inline int pte_exec(pte_t pte) | |
128 | { | |
a15af1c9 | 129 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
130 | } |
131 | ||
7e675137 NP |
132 | static inline int pte_special(pte_t pte) |
133 | { | |
606ee44d | 134 | return pte_flags(pte) & _PAGE_SPECIAL; |
7e675137 NP |
135 | } |
136 | ||
91030ca1 HD |
137 | static inline unsigned long pte_pfn(pte_t pte) |
138 | { | |
139 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
140 | } | |
141 | ||
087975b0 AM |
142 | static inline unsigned long pmd_pfn(pmd_t pmd) |
143 | { | |
144 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
145 | } | |
146 | ||
0ee364eb MG |
147 | static inline unsigned long pud_pfn(pud_t pud) |
148 | { | |
149 | return (pud_val(pud) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
150 | } | |
151 | ||
91030ca1 HD |
152 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
153 | ||
3cbaeafe JP |
154 | static inline int pmd_large(pmd_t pte) |
155 | { | |
027ef6c8 | 156 | return pmd_flags(pte) & _PAGE_PSE; |
3cbaeafe JP |
157 | } |
158 | ||
f2d6bfe9 JW |
159 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
160 | static inline int pmd_trans_splitting(pmd_t pmd) | |
161 | { | |
162 | return pmd_val(pmd) & _PAGE_SPLITTING; | |
163 | } | |
164 | ||
165 | static inline int pmd_trans_huge(pmd_t pmd) | |
166 | { | |
167 | return pmd_val(pmd) & _PAGE_PSE; | |
168 | } | |
4b7167b9 AA |
169 | |
170 | static inline int has_transparent_hugepage(void) | |
171 | { | |
172 | return cpu_has_pse; | |
173 | } | |
f2d6bfe9 JW |
174 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
175 | ||
6522869c JF |
176 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
177 | { | |
178 | pteval_t v = native_pte_val(pte); | |
179 | ||
180 | return native_make_pte(v | set); | |
181 | } | |
182 | ||
183 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
184 | { | |
185 | pteval_t v = native_pte_val(pte); | |
186 | ||
187 | return native_make_pte(v & ~clear); | |
188 | } | |
189 | ||
3cbaeafe JP |
190 | static inline pte_t pte_mkclean(pte_t pte) |
191 | { | |
6522869c | 192 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
193 | } |
194 | ||
195 | static inline pte_t pte_mkold(pte_t pte) | |
196 | { | |
6522869c | 197 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
198 | } |
199 | ||
200 | static inline pte_t pte_wrprotect(pte_t pte) | |
201 | { | |
6522869c | 202 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
203 | } |
204 | ||
205 | static inline pte_t pte_mkexec(pte_t pte) | |
206 | { | |
6522869c | 207 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
208 | } |
209 | ||
210 | static inline pte_t pte_mkdirty(pte_t pte) | |
211 | { | |
0f8975ec | 212 | return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
3cbaeafe JP |
213 | } |
214 | ||
215 | static inline pte_t pte_mkyoung(pte_t pte) | |
216 | { | |
6522869c | 217 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
218 | } |
219 | ||
220 | static inline pte_t pte_mkwrite(pte_t pte) | |
221 | { | |
6522869c | 222 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
223 | } |
224 | ||
225 | static inline pte_t pte_mkhuge(pte_t pte) | |
226 | { | |
6522869c | 227 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
228 | } |
229 | ||
230 | static inline pte_t pte_clrhuge(pte_t pte) | |
231 | { | |
6522869c | 232 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
233 | } |
234 | ||
235 | static inline pte_t pte_mkglobal(pte_t pte) | |
236 | { | |
6522869c | 237 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
238 | } |
239 | ||
240 | static inline pte_t pte_clrglobal(pte_t pte) | |
241 | { | |
6522869c | 242 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 243 | } |
4614139c | 244 | |
7e675137 NP |
245 | static inline pte_t pte_mkspecial(pte_t pte) |
246 | { | |
6522869c | 247 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
248 | } |
249 | ||
f2d6bfe9 JW |
250 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
251 | { | |
252 | pmdval_t v = native_pmd_val(pmd); | |
253 | ||
254 | return __pmd(v | set); | |
255 | } | |
256 | ||
257 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) | |
258 | { | |
259 | pmdval_t v = native_pmd_val(pmd); | |
260 | ||
261 | return __pmd(v & ~clear); | |
262 | } | |
263 | ||
264 | static inline pmd_t pmd_mkold(pmd_t pmd) | |
265 | { | |
266 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); | |
267 | } | |
268 | ||
269 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
270 | { | |
271 | return pmd_clear_flags(pmd, _PAGE_RW); | |
272 | } | |
273 | ||
274 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
275 | { | |
0f8975ec | 276 | return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
f2d6bfe9 JW |
277 | } |
278 | ||
279 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
280 | { | |
281 | return pmd_set_flags(pmd, _PAGE_PSE); | |
282 | } | |
283 | ||
284 | static inline pmd_t pmd_mkyoung(pmd_t pmd) | |
285 | { | |
286 | return pmd_set_flags(pmd, _PAGE_ACCESSED); | |
287 | } | |
288 | ||
289 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
290 | { | |
291 | return pmd_set_flags(pmd, _PAGE_RW); | |
292 | } | |
293 | ||
294 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) | |
295 | { | |
296 | return pmd_clear_flags(pmd, _PAGE_PRESENT); | |
297 | } | |
298 | ||
0f8975ec PE |
299 | static inline int pte_soft_dirty(pte_t pte) |
300 | { | |
301 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; | |
302 | } | |
303 | ||
304 | static inline int pmd_soft_dirty(pmd_t pmd) | |
305 | { | |
306 | return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; | |
307 | } | |
308 | ||
309 | static inline pte_t pte_mksoft_dirty(pte_t pte) | |
310 | { | |
311 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); | |
312 | } | |
313 | ||
314 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) | |
315 | { | |
316 | return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); | |
317 | } | |
318 | ||
41bb3476 CG |
319 | static inline pte_t pte_file_clear_soft_dirty(pte_t pte) |
320 | { | |
321 | return pte_clear_flags(pte, _PAGE_SOFT_DIRTY); | |
322 | } | |
323 | ||
324 | static inline pte_t pte_file_mksoft_dirty(pte_t pte) | |
325 | { | |
326 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); | |
327 | } | |
328 | ||
329 | static inline int pte_file_soft_dirty(pte_t pte) | |
330 | { | |
331 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; | |
332 | } | |
333 | ||
b534816b JF |
334 | /* |
335 | * Mask out unsupported bits in a present pgprot. Non-present pgprots | |
336 | * can use those bits for other purposes, so leave them be. | |
337 | */ | |
338 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) | |
339 | { | |
340 | pgprotval_t protval = pgprot_val(pgprot); | |
341 | ||
342 | if (protval & _PAGE_PRESENT) | |
343 | protval &= __supported_pte_mask; | |
344 | ||
345 | return protval; | |
346 | } | |
347 | ||
6fdc05d4 JF |
348 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
349 | { | |
b534816b JF |
350 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
351 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
352 | } |
353 | ||
354 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
355 | { | |
b534816b JF |
356 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
357 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
358 | } |
359 | ||
38472311 IM |
360 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
361 | { | |
362 | pteval_t val = pte_val(pte); | |
363 | ||
364 | /* | |
365 | * Chop off the NX bit (if present), and add the NX portion of | |
366 | * the newprot (if present): | |
367 | */ | |
1c12c4cf | 368 | val &= _PAGE_CHG_MASK; |
b534816b | 369 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
38472311 IM |
370 | |
371 | return __pte(val); | |
372 | } | |
373 | ||
c489f125 JW |
374 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
375 | { | |
376 | pmdval_t val = pmd_val(pmd); | |
377 | ||
378 | val &= _HPAGE_CHG_MASK; | |
379 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; | |
380 | ||
381 | return __pmd(val); | |
382 | } | |
383 | ||
1c12c4cf VP |
384 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
385 | #define pgprot_modify pgprot_modify | |
386 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
387 | { | |
388 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
389 | pgprotval_t addbits = pgprot_val(newprot); | |
390 | return __pgprot(preservebits | addbits); | |
391 | } | |
392 | ||
77be1fab | 393 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 394 | |
b534816b | 395 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
1e8e23bc | 396 | |
1adcaafe SS |
397 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
398 | unsigned long flags, | |
399 | unsigned long new_flags) | |
afc7d20c | 400 | { |
1adcaafe | 401 | /* |
55a6ca25 | 402 | * PAT type is always WB for untracked ranges, so no need to check. |
1adcaafe | 403 | */ |
8a271389 | 404 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
1adcaafe SS |
405 | return 1; |
406 | ||
afc7d20c | 407 | /* |
408 | * Certain new memtypes are not allowed with certain | |
409 | * requested memtype: | |
410 | * - request is uncached, return cannot be write-back | |
411 | * - request is write-combine, return cannot be write-back | |
412 | */ | |
413 | if ((flags == _PAGE_CACHE_UC_MINUS && | |
414 | new_flags == _PAGE_CACHE_WB) || | |
415 | (flags == _PAGE_CACHE_WC && | |
416 | new_flags == _PAGE_CACHE_WB)) { | |
417 | return 0; | |
418 | } | |
419 | ||
420 | return 1; | |
421 | } | |
422 | ||
458a3e64 TH |
423 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
424 | pte_t *populate_extra_pte(unsigned long vaddr); | |
4614139c JF |
425 | #endif /* __ASSEMBLY__ */ |
426 | ||
96a388de | 427 | #ifdef CONFIG_X86_32 |
a1ce3928 | 428 | # include <asm/pgtable_32.h> |
96a388de | 429 | #else |
a1ce3928 | 430 | # include <asm/pgtable_64.h> |
96a388de | 431 | #endif |
6c386655 | 432 | |
aca159db | 433 | #ifndef __ASSEMBLY__ |
f476961c | 434 | #include <linux/mm_types.h> |
fa0f281c | 435 | #include <linux/mmdebug.h> |
4cbeb51b | 436 | #include <linux/log2.h> |
aca159db | 437 | |
a034a010 JF |
438 | static inline int pte_none(pte_t pte) |
439 | { | |
440 | return !pte.pte; | |
441 | } | |
442 | ||
8de01da3 JF |
443 | #define __HAVE_ARCH_PTE_SAME |
444 | static inline int pte_same(pte_t a, pte_t b) | |
445 | { | |
446 | return a.pte == b.pte; | |
447 | } | |
448 | ||
7c683851 JF |
449 | static inline int pte_present(pte_t a) |
450 | { | |
5926f87f DV |
451 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE | |
452 | _PAGE_NUMA); | |
7c683851 JF |
453 | } |
454 | ||
2c3cf556 | 455 | #define pte_accessible pte_accessible |
20841405 | 456 | static inline bool pte_accessible(struct mm_struct *mm, pte_t a) |
2c3cf556 | 457 | { |
20841405 RR |
458 | if (pte_flags(a) & _PAGE_PRESENT) |
459 | return true; | |
460 | ||
461 | if ((pte_flags(a) & (_PAGE_PROTNONE | _PAGE_NUMA)) && | |
462 | mm_tlb_flush_pending(mm)) | |
463 | return true; | |
464 | ||
465 | return false; | |
2c3cf556 RR |
466 | } |
467 | ||
eb63657e | 468 | static inline int pte_hidden(pte_t pte) |
dfec072e | 469 | { |
eb63657e | 470 | return pte_flags(pte) & _PAGE_HIDDEN; |
dfec072e VN |
471 | } |
472 | ||
649e8ef6 JF |
473 | static inline int pmd_present(pmd_t pmd) |
474 | { | |
027ef6c8 AA |
475 | /* |
476 | * Checking for _PAGE_PSE is needed too because | |
477 | * split_huge_page will temporarily clear the present bit (but | |
478 | * the _PAGE_PSE flag will remain set at all times while the | |
479 | * _PAGE_PRESENT bit is clear). | |
480 | */ | |
be3a7284 AA |
481 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE | |
482 | _PAGE_NUMA); | |
649e8ef6 JF |
483 | } |
484 | ||
4fea801a JF |
485 | static inline int pmd_none(pmd_t pmd) |
486 | { | |
487 | /* Only check low word on 32-bit platforms, since it might be | |
488 | out of sync with upper half. */ | |
26c8e317 | 489 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
490 | } |
491 | ||
3ffb3564 JF |
492 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
493 | { | |
494 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); | |
495 | } | |
496 | ||
e5f7f202 IM |
497 | /* |
498 | * Currently stuck as a macro due to indirect forward reference to | |
499 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
500 | */ | |
db3eb96f | 501 | #define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT) |
20063ca4 | 502 | |
e24d7eee JF |
503 | /* |
504 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
505 | * | |
506 | * this macro returns the index of the entry in the pmd page which would | |
507 | * control the given virtual address | |
508 | */ | |
ce0c0f9e | 509 | static inline unsigned long pmd_index(unsigned long address) |
e24d7eee JF |
510 | { |
511 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
512 | } | |
513 | ||
97e2817d JF |
514 | /* |
515 | * Conversion functions: convert a page and protection to a page entry, | |
516 | * and a page entry and page directory to the page they refer to. | |
517 | * | |
518 | * (Currently stuck as a macro because of indirect forward reference | |
519 | * to linux/mm.h:page_to_nid()) | |
520 | */ | |
521 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
522 | ||
346309cf JF |
523 | /* |
524 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
525 | * | |
526 | * this function returns the index of the entry in the pte page which would | |
527 | * control the given virtual address | |
528 | */ | |
ce0c0f9e | 529 | static inline unsigned long pte_index(unsigned long address) |
346309cf JF |
530 | { |
531 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
532 | } | |
533 | ||
3fbc2444 JF |
534 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
535 | { | |
536 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
537 | } | |
538 | ||
99510238 JF |
539 | static inline int pmd_bad(pmd_t pmd) |
540 | { | |
be3a7284 AA |
541 | #ifdef CONFIG_NUMA_BALANCING |
542 | /* pmd_numa check */ | |
543 | if ((pmd_flags(pmd) & (_PAGE_NUMA|_PAGE_PRESENT)) == _PAGE_NUMA) | |
544 | return 0; | |
545 | #endif | |
18a7a199 | 546 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
547 | } |
548 | ||
cc290ca3 JF |
549 | static inline unsigned long pages_to_mb(unsigned long npg) |
550 | { | |
551 | return npg >> (20 - PAGE_SHIFT); | |
552 | } | |
553 | ||
5ba7c913 | 554 | #if PAGETABLE_LEVELS > 2 |
deb79cfb JF |
555 | static inline int pud_none(pud_t pud) |
556 | { | |
26c8e317 | 557 | return native_pud_val(pud) == 0; |
deb79cfb JF |
558 | } |
559 | ||
5ba7c913 JF |
560 | static inline int pud_present(pud_t pud) |
561 | { | |
18a7a199 | 562 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 563 | } |
6fff47e3 JF |
564 | |
565 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
566 | { | |
567 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); | |
568 | } | |
f476961c | 569 | |
e5f7f202 IM |
570 | /* |
571 | * Currently stuck as a macro due to indirect forward reference to | |
572 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
573 | */ | |
574 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) | |
01ade20d JF |
575 | |
576 | /* Find an entry in the second-level page table.. */ | |
577 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
578 | { | |
579 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
580 | } | |
3180fba0 | 581 | |
3f6cbef1 JF |
582 | static inline int pud_large(pud_t pud) |
583 | { | |
e2f5bda9 | 584 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
585 | (_PAGE_PSE | _PAGE_PRESENT); |
586 | } | |
a61bb29a JF |
587 | |
588 | static inline int pud_bad(pud_t pud) | |
589 | { | |
18a7a199 | 590 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 591 | } |
e2f5bda9 JF |
592 | #else |
593 | static inline int pud_large(pud_t pud) | |
594 | { | |
595 | return 0; | |
596 | } | |
5ba7c913 JF |
597 | #endif /* PAGETABLE_LEVELS > 2 */ |
598 | ||
9f38d7e8 JF |
599 | #if PAGETABLE_LEVELS > 3 |
600 | static inline int pgd_present(pgd_t pgd) | |
601 | { | |
18a7a199 | 602 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 603 | } |
c5f040b1 JF |
604 | |
605 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
606 | { | |
607 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
608 | } | |
777cba16 | 609 | |
e5f7f202 IM |
610 | /* |
611 | * Currently stuck as a macro due to indirect forward reference to | |
612 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
613 | */ | |
614 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
615 | |
616 | /* to find an entry in a page-table-directory. */ | |
ce0c0f9e | 617 | static inline unsigned long pud_index(unsigned long address) |
7cfb8102 JF |
618 | { |
619 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
620 | } | |
3d081b18 JF |
621 | |
622 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
623 | { | |
624 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
625 | } | |
30f10316 JF |
626 | |
627 | static inline int pgd_bad(pgd_t pgd) | |
628 | { | |
18a7a199 | 629 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 630 | } |
7325cc2e JF |
631 | |
632 | static inline int pgd_none(pgd_t pgd) | |
633 | { | |
26c8e317 | 634 | return !native_pgd_val(pgd); |
7325cc2e | 635 | } |
9f38d7e8 JF |
636 | #endif /* PAGETABLE_LEVELS > 3 */ |
637 | ||
4614139c JF |
638 | #endif /* __ASSEMBLY__ */ |
639 | ||
fb15a9b3 JF |
640 | /* |
641 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
642 | * | |
643 | * this macro returns the index of the entry in the pgd page which would | |
644 | * control the given virtual address | |
645 | */ | |
646 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
647 | ||
648 | /* | |
649 | * pgd_offset() returns a (pgd_t *) | |
650 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
651 | */ | |
652 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
653 | /* | |
654 | * a shortcut which implies the use of the kernel's pgd, instead | |
655 | * of a process's | |
656 | */ | |
657 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
658 | ||
659 | ||
68db065c JF |
660 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
661 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
662 | ||
195466dc JF |
663 | #ifndef __ASSEMBLY__ |
664 | ||
2c1b284e | 665 | extern int direct_gbpages; |
22ddfcaa | 666 | void init_mem_mapping(void); |
8d57470d | 667 | void early_alloc_pgt_buf(void); |
2c1b284e | 668 | |
4891645e JF |
669 | /* local pte updates need not use xchg for locking */ |
670 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
671 | { | |
672 | pte_t res = *ptep; | |
673 | ||
674 | /* Pure native function needs no input for mm, addr */ | |
675 | native_pte_clear(NULL, 0, ptep); | |
676 | return res; | |
677 | } | |
678 | ||
f2d6bfe9 JW |
679 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
680 | { | |
681 | pmd_t res = *pmdp; | |
682 | ||
683 | native_pmd_clear(pmdp); | |
684 | return res; | |
685 | } | |
686 | ||
4891645e JF |
687 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
688 | pte_t *ptep , pte_t pte) | |
689 | { | |
690 | native_set_pte(ptep, pte); | |
691 | } | |
692 | ||
0a47de52 AA |
693 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
694 | pmd_t *pmdp , pmd_t pmd) | |
695 | { | |
696 | native_set_pmd(pmdp, pmd); | |
697 | } | |
698 | ||
195466dc JF |
699 | #ifndef CONFIG_PARAVIRT |
700 | /* | |
701 | * Rules for using pte_update - it must be called after any PTE update which | |
702 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
703 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
704 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
705 | * transitions, which means this hook should only be called for user PTEs. | |
706 | * This hook implies a P->P protection or access change has taken place, which | |
707 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
708 | * until the TLB flush event by using the pte_update_defer form of the | |
709 | * interface, but care must be taken to assure that the flush happens while | |
710 | * still holding the same page table lock so that the shadow and primary pages | |
711 | * do not become out of sync on SMP. | |
712 | */ | |
713 | #define pte_update(mm, addr, ptep) do { } while (0) | |
714 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
715 | #endif | |
716 | ||
195466dc JF |
717 | /* |
718 | * We only update the dirty/accessed state if we set | |
719 | * the dirty bit by hand in the kernel, since the hardware | |
720 | * will do the accessed bit for us, and we don't want to | |
721 | * race with other CPU's that might be updating the dirty | |
722 | * bit at the same time. | |
723 | */ | |
bea41808 JF |
724 | struct vm_area_struct; |
725 | ||
195466dc | 726 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
727 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
728 | unsigned long address, pte_t *ptep, | |
729 | pte_t entry, int dirty); | |
195466dc JF |
730 | |
731 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
732 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
733 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
734 | |
735 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
736 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
737 | unsigned long address, pte_t *ptep); | |
195466dc JF |
738 | |
739 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
740 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
741 | pte_t *ptep) | |
195466dc JF |
742 | { |
743 | pte_t pte = native_ptep_get_and_clear(ptep); | |
744 | pte_update(mm, addr, ptep); | |
745 | return pte; | |
746 | } | |
747 | ||
748 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
749 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
750 | unsigned long addr, pte_t *ptep, | |
751 | int full) | |
195466dc JF |
752 | { |
753 | pte_t pte; | |
754 | if (full) { | |
755 | /* | |
756 | * Full address destruction in progress; paravirt does not | |
757 | * care about updates and native needs no locking | |
758 | */ | |
759 | pte = native_local_ptep_get_and_clear(ptep); | |
760 | } else { | |
761 | pte = ptep_get_and_clear(mm, addr, ptep); | |
762 | } | |
763 | return pte; | |
764 | } | |
765 | ||
766 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
767 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
768 | unsigned long addr, pte_t *ptep) | |
195466dc | 769 | { |
d8d89827 | 770 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
771 | pte_update(mm, addr, ptep); |
772 | } | |
773 | ||
2ac13462 | 774 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
61c77326 | 775 | |
f2d6bfe9 JW |
776 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
777 | ||
778 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS | |
779 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, | |
780 | unsigned long address, pmd_t *pmdp, | |
781 | pmd_t entry, int dirty); | |
782 | ||
783 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG | |
784 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, | |
785 | unsigned long addr, pmd_t *pmdp); | |
786 | ||
787 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH | |
788 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, | |
789 | unsigned long address, pmd_t *pmdp); | |
790 | ||
791 | ||
792 | #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH | |
793 | extern void pmdp_splitting_flush(struct vm_area_struct *vma, | |
794 | unsigned long addr, pmd_t *pmdp); | |
795 | ||
796 | #define __HAVE_ARCH_PMD_WRITE | |
797 | static inline int pmd_write(pmd_t pmd) | |
798 | { | |
799 | return pmd_flags(pmd) & _PAGE_RW; | |
800 | } | |
801 | ||
802 | #define __HAVE_ARCH_PMDP_GET_AND_CLEAR | |
803 | static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
804 | pmd_t *pmdp) | |
805 | { | |
806 | pmd_t pmd = native_pmdp_get_and_clear(pmdp); | |
807 | pmd_update(mm, addr, pmdp); | |
808 | return pmd; | |
809 | } | |
810 | ||
811 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT | |
812 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, | |
813 | unsigned long addr, pmd_t *pmdp) | |
814 | { | |
815 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); | |
816 | pmd_update(mm, addr, pmdp); | |
817 | } | |
818 | ||
85958b46 JF |
819 | /* |
820 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
821 | * | |
822 | * dst - pointer to pgd range anwhere on a pgd page | |
823 | * src - "" | |
824 | * count - the number of pgds to copy. | |
825 | * | |
826 | * dst and src can be on the same page, but the range must not overlap, | |
827 | * and must not cross a page boundary. | |
828 | */ | |
829 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
830 | { | |
831 | memcpy(dst, src, count * sizeof(pgd_t)); | |
832 | } | |
833 | ||
4cbeb51b DH |
834 | #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
835 | static inline int page_level_shift(enum pg_level level) | |
836 | { | |
837 | return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; | |
838 | } | |
839 | static inline unsigned long page_level_size(enum pg_level level) | |
840 | { | |
841 | return 1UL << page_level_shift(level); | |
842 | } | |
843 | static inline unsigned long page_level_mask(enum pg_level level) | |
844 | { | |
845 | return ~(page_level_size(level) - 1); | |
846 | } | |
85958b46 | 847 | |
602e0186 KS |
848 | /* |
849 | * The x86 doesn't have any external MMU info: the kernel page | |
850 | * tables contain all the necessary information. | |
851 | */ | |
852 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
853 | unsigned long addr, pte_t *ptep) | |
854 | { | |
855 | } | |
856 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, | |
857 | unsigned long addr, pmd_t *pmd) | |
858 | { | |
859 | } | |
85958b46 | 860 | |
fa0f281c CG |
861 | static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
862 | { | |
863 | VM_BUG_ON(pte_present(pte)); | |
864 | return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); | |
865 | } | |
866 | ||
867 | static inline int pte_swp_soft_dirty(pte_t pte) | |
868 | { | |
869 | VM_BUG_ON(pte_present(pte)); | |
870 | return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; | |
871 | } | |
872 | ||
873 | static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) | |
874 | { | |
875 | VM_BUG_ON(pte_present(pte)); | |
876 | return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); | |
877 | } | |
878 | ||
195466dc JF |
879 | #include <asm-generic/pgtable.h> |
880 | #endif /* __ASSEMBLY__ */ | |
881 | ||
1965aae3 | 882 | #endif /* _ASM_X86_PGTABLE_H */ |