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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 | { | |
c46a7c81 MG |
134 | return (pte_flags(pte) & (_PAGE_PRESENT|_PAGE_SPECIAL)) == |
135 | (_PAGE_PRESENT|_PAGE_SPECIAL); | |
7e675137 NP |
136 | } |
137 | ||
91030ca1 HD |
138 | static inline unsigned long pte_pfn(pte_t pte) |
139 | { | |
140 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
141 | } | |
142 | ||
087975b0 AM |
143 | static inline unsigned long pmd_pfn(pmd_t pmd) |
144 | { | |
145 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
146 | } | |
147 | ||
0ee364eb MG |
148 | static inline unsigned long pud_pfn(pud_t pud) |
149 | { | |
150 | return (pud_val(pud) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
151 | } | |
152 | ||
91030ca1 HD |
153 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
154 | ||
3cbaeafe JP |
155 | static inline int pmd_large(pmd_t pte) |
156 | { | |
027ef6c8 | 157 | return pmd_flags(pte) & _PAGE_PSE; |
3cbaeafe JP |
158 | } |
159 | ||
f2d6bfe9 JW |
160 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
161 | static inline int pmd_trans_splitting(pmd_t pmd) | |
162 | { | |
163 | return pmd_val(pmd) & _PAGE_SPLITTING; | |
164 | } | |
165 | ||
166 | static inline int pmd_trans_huge(pmd_t pmd) | |
167 | { | |
168 | return pmd_val(pmd) & _PAGE_PSE; | |
169 | } | |
4b7167b9 AA |
170 | |
171 | static inline int has_transparent_hugepage(void) | |
172 | { | |
173 | return cpu_has_pse; | |
174 | } | |
f2d6bfe9 JW |
175 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
176 | ||
6522869c JF |
177 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
178 | { | |
179 | pteval_t v = native_pte_val(pte); | |
180 | ||
181 | return native_make_pte(v | set); | |
182 | } | |
183 | ||
184 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
185 | { | |
186 | pteval_t v = native_pte_val(pte); | |
187 | ||
188 | return native_make_pte(v & ~clear); | |
189 | } | |
190 | ||
3cbaeafe JP |
191 | static inline pte_t pte_mkclean(pte_t pte) |
192 | { | |
6522869c | 193 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
194 | } |
195 | ||
196 | static inline pte_t pte_mkold(pte_t pte) | |
197 | { | |
6522869c | 198 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
199 | } |
200 | ||
201 | static inline pte_t pte_wrprotect(pte_t pte) | |
202 | { | |
6522869c | 203 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
204 | } |
205 | ||
206 | static inline pte_t pte_mkexec(pte_t pte) | |
207 | { | |
6522869c | 208 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
209 | } |
210 | ||
211 | static inline pte_t pte_mkdirty(pte_t pte) | |
212 | { | |
0f8975ec | 213 | return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
3cbaeafe JP |
214 | } |
215 | ||
216 | static inline pte_t pte_mkyoung(pte_t pte) | |
217 | { | |
6522869c | 218 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
219 | } |
220 | ||
221 | static inline pte_t pte_mkwrite(pte_t pte) | |
222 | { | |
6522869c | 223 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
224 | } |
225 | ||
226 | static inline pte_t pte_mkhuge(pte_t pte) | |
227 | { | |
6522869c | 228 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
229 | } |
230 | ||
231 | static inline pte_t pte_clrhuge(pte_t pte) | |
232 | { | |
6522869c | 233 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
234 | } |
235 | ||
236 | static inline pte_t pte_mkglobal(pte_t pte) | |
237 | { | |
6522869c | 238 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
239 | } |
240 | ||
241 | static inline pte_t pte_clrglobal(pte_t pte) | |
242 | { | |
6522869c | 243 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 244 | } |
4614139c | 245 | |
7e675137 NP |
246 | static inline pte_t pte_mkspecial(pte_t pte) |
247 | { | |
6522869c | 248 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
249 | } |
250 | ||
f2d6bfe9 JW |
251 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
252 | { | |
253 | pmdval_t v = native_pmd_val(pmd); | |
254 | ||
255 | return __pmd(v | set); | |
256 | } | |
257 | ||
258 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) | |
259 | { | |
260 | pmdval_t v = native_pmd_val(pmd); | |
261 | ||
262 | return __pmd(v & ~clear); | |
263 | } | |
264 | ||
265 | static inline pmd_t pmd_mkold(pmd_t pmd) | |
266 | { | |
267 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); | |
268 | } | |
269 | ||
270 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
271 | { | |
272 | return pmd_clear_flags(pmd, _PAGE_RW); | |
273 | } | |
274 | ||
275 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
276 | { | |
0f8975ec | 277 | return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
f2d6bfe9 JW |
278 | } |
279 | ||
280 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
281 | { | |
282 | return pmd_set_flags(pmd, _PAGE_PSE); | |
283 | } | |
284 | ||
285 | static inline pmd_t pmd_mkyoung(pmd_t pmd) | |
286 | { | |
287 | return pmd_set_flags(pmd, _PAGE_ACCESSED); | |
288 | } | |
289 | ||
290 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
291 | { | |
292 | return pmd_set_flags(pmd, _PAGE_RW); | |
293 | } | |
294 | ||
295 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) | |
296 | { | |
297 | return pmd_clear_flags(pmd, _PAGE_PRESENT); | |
298 | } | |
299 | ||
2bf01f9f | 300 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
0f8975ec PE |
301 | static inline int pte_soft_dirty(pte_t pte) |
302 | { | |
303 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; | |
304 | } | |
305 | ||
306 | static inline int pmd_soft_dirty(pmd_t pmd) | |
307 | { | |
308 | return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; | |
309 | } | |
310 | ||
311 | static inline pte_t pte_mksoft_dirty(pte_t pte) | |
312 | { | |
313 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); | |
314 | } | |
315 | ||
316 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) | |
317 | { | |
318 | return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); | |
319 | } | |
320 | ||
41bb3476 CG |
321 | static inline pte_t pte_file_clear_soft_dirty(pte_t pte) |
322 | { | |
323 | return pte_clear_flags(pte, _PAGE_SOFT_DIRTY); | |
324 | } | |
325 | ||
326 | static inline pte_t pte_file_mksoft_dirty(pte_t pte) | |
327 | { | |
328 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); | |
329 | } | |
330 | ||
331 | static inline int pte_file_soft_dirty(pte_t pte) | |
332 | { | |
333 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; | |
334 | } | |
335 | ||
2bf01f9f CG |
336 | #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
337 | ||
b534816b JF |
338 | /* |
339 | * Mask out unsupported bits in a present pgprot. Non-present pgprots | |
340 | * can use those bits for other purposes, so leave them be. | |
341 | */ | |
342 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) | |
343 | { | |
344 | pgprotval_t protval = pgprot_val(pgprot); | |
345 | ||
346 | if (protval & _PAGE_PRESENT) | |
347 | protval &= __supported_pte_mask; | |
348 | ||
349 | return protval; | |
350 | } | |
351 | ||
6fdc05d4 JF |
352 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
353 | { | |
b534816b JF |
354 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
355 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
356 | } |
357 | ||
358 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
359 | { | |
b534816b JF |
360 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
361 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
362 | } |
363 | ||
38472311 IM |
364 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
365 | { | |
366 | pteval_t val = pte_val(pte); | |
367 | ||
368 | /* | |
369 | * Chop off the NX bit (if present), and add the NX portion of | |
370 | * the newprot (if present): | |
371 | */ | |
1c12c4cf | 372 | val &= _PAGE_CHG_MASK; |
b534816b | 373 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
38472311 IM |
374 | |
375 | return __pte(val); | |
376 | } | |
377 | ||
c489f125 JW |
378 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
379 | { | |
380 | pmdval_t val = pmd_val(pmd); | |
381 | ||
382 | val &= _HPAGE_CHG_MASK; | |
383 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; | |
384 | ||
385 | return __pmd(val); | |
386 | } | |
387 | ||
1c12c4cf VP |
388 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
389 | #define pgprot_modify pgprot_modify | |
390 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
391 | { | |
392 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
393 | pgprotval_t addbits = pgprot_val(newprot); | |
394 | return __pgprot(preservebits | addbits); | |
395 | } | |
396 | ||
77be1fab | 397 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 398 | |
b534816b | 399 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
1e8e23bc | 400 | |
1adcaafe SS |
401 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
402 | unsigned long flags, | |
403 | unsigned long new_flags) | |
afc7d20c | 404 | { |
1adcaafe | 405 | /* |
55a6ca25 | 406 | * PAT type is always WB for untracked ranges, so no need to check. |
1adcaafe | 407 | */ |
8a271389 | 408 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
1adcaafe SS |
409 | return 1; |
410 | ||
afc7d20c | 411 | /* |
412 | * Certain new memtypes are not allowed with certain | |
413 | * requested memtype: | |
414 | * - request is uncached, return cannot be write-back | |
415 | * - request is write-combine, return cannot be write-back | |
416 | */ | |
417 | if ((flags == _PAGE_CACHE_UC_MINUS && | |
418 | new_flags == _PAGE_CACHE_WB) || | |
419 | (flags == _PAGE_CACHE_WC && | |
420 | new_flags == _PAGE_CACHE_WB)) { | |
421 | return 0; | |
422 | } | |
423 | ||
424 | return 1; | |
425 | } | |
426 | ||
458a3e64 TH |
427 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
428 | pte_t *populate_extra_pte(unsigned long vaddr); | |
4614139c JF |
429 | #endif /* __ASSEMBLY__ */ |
430 | ||
96a388de | 431 | #ifdef CONFIG_X86_32 |
a1ce3928 | 432 | # include <asm/pgtable_32.h> |
96a388de | 433 | #else |
a1ce3928 | 434 | # include <asm/pgtable_64.h> |
96a388de | 435 | #endif |
6c386655 | 436 | |
aca159db | 437 | #ifndef __ASSEMBLY__ |
f476961c | 438 | #include <linux/mm_types.h> |
fa0f281c | 439 | #include <linux/mmdebug.h> |
4cbeb51b | 440 | #include <linux/log2.h> |
aca159db | 441 | |
a034a010 JF |
442 | static inline int pte_none(pte_t pte) |
443 | { | |
444 | return !pte.pte; | |
445 | } | |
446 | ||
8de01da3 JF |
447 | #define __HAVE_ARCH_PTE_SAME |
448 | static inline int pte_same(pte_t a, pte_t b) | |
449 | { | |
450 | return a.pte == b.pte; | |
451 | } | |
452 | ||
7c683851 JF |
453 | static inline int pte_present(pte_t a) |
454 | { | |
5926f87f DV |
455 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE | |
456 | _PAGE_NUMA); | |
7c683851 JF |
457 | } |
458 | ||
c46a7c81 MG |
459 | #define pte_present_nonuma pte_present_nonuma |
460 | static inline int pte_present_nonuma(pte_t a) | |
461 | { | |
462 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); | |
463 | } | |
464 | ||
2c3cf556 | 465 | #define pte_accessible pte_accessible |
20841405 | 466 | static inline bool pte_accessible(struct mm_struct *mm, pte_t a) |
2c3cf556 | 467 | { |
20841405 RR |
468 | if (pte_flags(a) & _PAGE_PRESENT) |
469 | return true; | |
470 | ||
471 | if ((pte_flags(a) & (_PAGE_PROTNONE | _PAGE_NUMA)) && | |
472 | mm_tlb_flush_pending(mm)) | |
473 | return true; | |
474 | ||
475 | return false; | |
2c3cf556 RR |
476 | } |
477 | ||
eb63657e | 478 | static inline int pte_hidden(pte_t pte) |
dfec072e | 479 | { |
eb63657e | 480 | return pte_flags(pte) & _PAGE_HIDDEN; |
dfec072e VN |
481 | } |
482 | ||
649e8ef6 JF |
483 | static inline int pmd_present(pmd_t pmd) |
484 | { | |
027ef6c8 AA |
485 | /* |
486 | * Checking for _PAGE_PSE is needed too because | |
487 | * split_huge_page will temporarily clear the present bit (but | |
488 | * the _PAGE_PSE flag will remain set at all times while the | |
489 | * _PAGE_PRESENT bit is clear). | |
490 | */ | |
be3a7284 AA |
491 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE | |
492 | _PAGE_NUMA); | |
649e8ef6 JF |
493 | } |
494 | ||
4fea801a JF |
495 | static inline int pmd_none(pmd_t pmd) |
496 | { | |
497 | /* Only check low word on 32-bit platforms, since it might be | |
498 | out of sync with upper half. */ | |
26c8e317 | 499 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
500 | } |
501 | ||
3ffb3564 JF |
502 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
503 | { | |
504 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); | |
505 | } | |
506 | ||
e5f7f202 IM |
507 | /* |
508 | * Currently stuck as a macro due to indirect forward reference to | |
509 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
510 | */ | |
db3eb96f | 511 | #define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT) |
20063ca4 | 512 | |
e24d7eee JF |
513 | /* |
514 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
515 | * | |
516 | * this macro returns the index of the entry in the pmd page which would | |
517 | * control the given virtual address | |
518 | */ | |
ce0c0f9e | 519 | static inline unsigned long pmd_index(unsigned long address) |
e24d7eee JF |
520 | { |
521 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
522 | } | |
523 | ||
97e2817d JF |
524 | /* |
525 | * Conversion functions: convert a page and protection to a page entry, | |
526 | * and a page entry and page directory to the page they refer to. | |
527 | * | |
528 | * (Currently stuck as a macro because of indirect forward reference | |
529 | * to linux/mm.h:page_to_nid()) | |
530 | */ | |
531 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
532 | ||
346309cf JF |
533 | /* |
534 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
535 | * | |
536 | * this function returns the index of the entry in the pte page which would | |
537 | * control the given virtual address | |
538 | */ | |
ce0c0f9e | 539 | static inline unsigned long pte_index(unsigned long address) |
346309cf JF |
540 | { |
541 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
542 | } | |
543 | ||
3fbc2444 JF |
544 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
545 | { | |
546 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
547 | } | |
548 | ||
99510238 JF |
549 | static inline int pmd_bad(pmd_t pmd) |
550 | { | |
be3a7284 AA |
551 | #ifdef CONFIG_NUMA_BALANCING |
552 | /* pmd_numa check */ | |
553 | if ((pmd_flags(pmd) & (_PAGE_NUMA|_PAGE_PRESENT)) == _PAGE_NUMA) | |
554 | return 0; | |
555 | #endif | |
18a7a199 | 556 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
557 | } |
558 | ||
cc290ca3 JF |
559 | static inline unsigned long pages_to_mb(unsigned long npg) |
560 | { | |
561 | return npg >> (20 - PAGE_SHIFT); | |
562 | } | |
563 | ||
5ba7c913 | 564 | #if PAGETABLE_LEVELS > 2 |
deb79cfb JF |
565 | static inline int pud_none(pud_t pud) |
566 | { | |
26c8e317 | 567 | return native_pud_val(pud) == 0; |
deb79cfb JF |
568 | } |
569 | ||
5ba7c913 JF |
570 | static inline int pud_present(pud_t pud) |
571 | { | |
18a7a199 | 572 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 573 | } |
6fff47e3 JF |
574 | |
575 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
576 | { | |
577 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); | |
578 | } | |
f476961c | 579 | |
e5f7f202 IM |
580 | /* |
581 | * Currently stuck as a macro due to indirect forward reference to | |
582 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
583 | */ | |
584 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) | |
01ade20d JF |
585 | |
586 | /* Find an entry in the second-level page table.. */ | |
587 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
588 | { | |
589 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
590 | } | |
3180fba0 | 591 | |
3f6cbef1 JF |
592 | static inline int pud_large(pud_t pud) |
593 | { | |
e2f5bda9 | 594 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
595 | (_PAGE_PSE | _PAGE_PRESENT); |
596 | } | |
a61bb29a JF |
597 | |
598 | static inline int pud_bad(pud_t pud) | |
599 | { | |
18a7a199 | 600 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 601 | } |
e2f5bda9 JF |
602 | #else |
603 | static inline int pud_large(pud_t pud) | |
604 | { | |
605 | return 0; | |
606 | } | |
5ba7c913 JF |
607 | #endif /* PAGETABLE_LEVELS > 2 */ |
608 | ||
9f38d7e8 JF |
609 | #if PAGETABLE_LEVELS > 3 |
610 | static inline int pgd_present(pgd_t pgd) | |
611 | { | |
18a7a199 | 612 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 613 | } |
c5f040b1 JF |
614 | |
615 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
616 | { | |
617 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
618 | } | |
777cba16 | 619 | |
e5f7f202 IM |
620 | /* |
621 | * Currently stuck as a macro due to indirect forward reference to | |
622 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
623 | */ | |
624 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
625 | |
626 | /* to find an entry in a page-table-directory. */ | |
ce0c0f9e | 627 | static inline unsigned long pud_index(unsigned long address) |
7cfb8102 JF |
628 | { |
629 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
630 | } | |
3d081b18 JF |
631 | |
632 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
633 | { | |
634 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
635 | } | |
30f10316 JF |
636 | |
637 | static inline int pgd_bad(pgd_t pgd) | |
638 | { | |
18a7a199 | 639 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 640 | } |
7325cc2e JF |
641 | |
642 | static inline int pgd_none(pgd_t pgd) | |
643 | { | |
26c8e317 | 644 | return !native_pgd_val(pgd); |
7325cc2e | 645 | } |
9f38d7e8 JF |
646 | #endif /* PAGETABLE_LEVELS > 3 */ |
647 | ||
4614139c JF |
648 | #endif /* __ASSEMBLY__ */ |
649 | ||
fb15a9b3 JF |
650 | /* |
651 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
652 | * | |
653 | * this macro returns the index of the entry in the pgd page which would | |
654 | * control the given virtual address | |
655 | */ | |
656 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
657 | ||
658 | /* | |
659 | * pgd_offset() returns a (pgd_t *) | |
660 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
661 | */ | |
662 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
663 | /* | |
664 | * a shortcut which implies the use of the kernel's pgd, instead | |
665 | * of a process's | |
666 | */ | |
667 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
668 | ||
669 | ||
68db065c JF |
670 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
671 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
672 | ||
195466dc JF |
673 | #ifndef __ASSEMBLY__ |
674 | ||
2c1b284e | 675 | extern int direct_gbpages; |
22ddfcaa | 676 | void init_mem_mapping(void); |
8d57470d | 677 | void early_alloc_pgt_buf(void); |
2c1b284e | 678 | |
4891645e JF |
679 | /* local pte updates need not use xchg for locking */ |
680 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
681 | { | |
682 | pte_t res = *ptep; | |
683 | ||
684 | /* Pure native function needs no input for mm, addr */ | |
685 | native_pte_clear(NULL, 0, ptep); | |
686 | return res; | |
687 | } | |
688 | ||
f2d6bfe9 JW |
689 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
690 | { | |
691 | pmd_t res = *pmdp; | |
692 | ||
693 | native_pmd_clear(pmdp); | |
694 | return res; | |
695 | } | |
696 | ||
4891645e JF |
697 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
698 | pte_t *ptep , pte_t pte) | |
699 | { | |
700 | native_set_pte(ptep, pte); | |
701 | } | |
702 | ||
0a47de52 AA |
703 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
704 | pmd_t *pmdp , pmd_t pmd) | |
705 | { | |
706 | native_set_pmd(pmdp, pmd); | |
707 | } | |
708 | ||
195466dc JF |
709 | #ifndef CONFIG_PARAVIRT |
710 | /* | |
711 | * Rules for using pte_update - it must be called after any PTE update which | |
712 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
713 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
714 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
715 | * transitions, which means this hook should only be called for user PTEs. | |
716 | * This hook implies a P->P protection or access change has taken place, which | |
717 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
718 | * until the TLB flush event by using the pte_update_defer form of the | |
719 | * interface, but care must be taken to assure that the flush happens while | |
720 | * still holding the same page table lock so that the shadow and primary pages | |
721 | * do not become out of sync on SMP. | |
722 | */ | |
723 | #define pte_update(mm, addr, ptep) do { } while (0) | |
724 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
725 | #endif | |
726 | ||
195466dc JF |
727 | /* |
728 | * We only update the dirty/accessed state if we set | |
729 | * the dirty bit by hand in the kernel, since the hardware | |
730 | * will do the accessed bit for us, and we don't want to | |
731 | * race with other CPU's that might be updating the dirty | |
732 | * bit at the same time. | |
733 | */ | |
bea41808 JF |
734 | struct vm_area_struct; |
735 | ||
195466dc | 736 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
737 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
738 | unsigned long address, pte_t *ptep, | |
739 | pte_t entry, int dirty); | |
195466dc JF |
740 | |
741 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
742 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
743 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
744 | |
745 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
746 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
747 | unsigned long address, pte_t *ptep); | |
195466dc JF |
748 | |
749 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
750 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
751 | pte_t *ptep) | |
195466dc JF |
752 | { |
753 | pte_t pte = native_ptep_get_and_clear(ptep); | |
754 | pte_update(mm, addr, ptep); | |
755 | return pte; | |
756 | } | |
757 | ||
758 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
759 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
760 | unsigned long addr, pte_t *ptep, | |
761 | int full) | |
195466dc JF |
762 | { |
763 | pte_t pte; | |
764 | if (full) { | |
765 | /* | |
766 | * Full address destruction in progress; paravirt does not | |
767 | * care about updates and native needs no locking | |
768 | */ | |
769 | pte = native_local_ptep_get_and_clear(ptep); | |
770 | } else { | |
771 | pte = ptep_get_and_clear(mm, addr, ptep); | |
772 | } | |
773 | return pte; | |
774 | } | |
775 | ||
776 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
777 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
778 | unsigned long addr, pte_t *ptep) | |
195466dc | 779 | { |
d8d89827 | 780 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
781 | pte_update(mm, addr, ptep); |
782 | } | |
783 | ||
2ac13462 | 784 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
61c77326 | 785 | |
f2d6bfe9 JW |
786 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
787 | ||
788 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS | |
789 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, | |
790 | unsigned long address, pmd_t *pmdp, | |
791 | pmd_t entry, int dirty); | |
792 | ||
793 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG | |
794 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, | |
795 | unsigned long addr, pmd_t *pmdp); | |
796 | ||
797 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH | |
798 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, | |
799 | unsigned long address, pmd_t *pmdp); | |
800 | ||
801 | ||
802 | #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH | |
803 | extern void pmdp_splitting_flush(struct vm_area_struct *vma, | |
804 | unsigned long addr, pmd_t *pmdp); | |
805 | ||
806 | #define __HAVE_ARCH_PMD_WRITE | |
807 | static inline int pmd_write(pmd_t pmd) | |
808 | { | |
809 | return pmd_flags(pmd) & _PAGE_RW; | |
810 | } | |
811 | ||
812 | #define __HAVE_ARCH_PMDP_GET_AND_CLEAR | |
813 | static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
814 | pmd_t *pmdp) | |
815 | { | |
816 | pmd_t pmd = native_pmdp_get_and_clear(pmdp); | |
817 | pmd_update(mm, addr, pmdp); | |
818 | return pmd; | |
819 | } | |
820 | ||
821 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT | |
822 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, | |
823 | unsigned long addr, pmd_t *pmdp) | |
824 | { | |
825 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); | |
826 | pmd_update(mm, addr, pmdp); | |
827 | } | |
828 | ||
85958b46 JF |
829 | /* |
830 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
831 | * | |
832 | * dst - pointer to pgd range anwhere on a pgd page | |
833 | * src - "" | |
834 | * count - the number of pgds to copy. | |
835 | * | |
836 | * dst and src can be on the same page, but the range must not overlap, | |
837 | * and must not cross a page boundary. | |
838 | */ | |
839 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
840 | { | |
841 | memcpy(dst, src, count * sizeof(pgd_t)); | |
842 | } | |
843 | ||
4cbeb51b DH |
844 | #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
845 | static inline int page_level_shift(enum pg_level level) | |
846 | { | |
847 | return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; | |
848 | } | |
849 | static inline unsigned long page_level_size(enum pg_level level) | |
850 | { | |
851 | return 1UL << page_level_shift(level); | |
852 | } | |
853 | static inline unsigned long page_level_mask(enum pg_level level) | |
854 | { | |
855 | return ~(page_level_size(level) - 1); | |
856 | } | |
85958b46 | 857 | |
602e0186 KS |
858 | /* |
859 | * The x86 doesn't have any external MMU info: the kernel page | |
860 | * tables contain all the necessary information. | |
861 | */ | |
862 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
863 | unsigned long addr, pte_t *ptep) | |
864 | { | |
865 | } | |
866 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, | |
867 | unsigned long addr, pmd_t *pmd) | |
868 | { | |
869 | } | |
85958b46 | 870 | |
2bf01f9f | 871 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
fa0f281c CG |
872 | static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
873 | { | |
c46a7c81 | 874 | VM_BUG_ON(pte_present_nonuma(pte)); |
fa0f281c CG |
875 | return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
876 | } | |
877 | ||
878 | static inline int pte_swp_soft_dirty(pte_t pte) | |
879 | { | |
c46a7c81 | 880 | VM_BUG_ON(pte_present_nonuma(pte)); |
fa0f281c CG |
881 | return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; |
882 | } | |
883 | ||
884 | static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) | |
885 | { | |
c46a7c81 | 886 | VM_BUG_ON(pte_present_nonuma(pte)); |
fa0f281c CG |
887 | return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
888 | } | |
2bf01f9f | 889 | #endif |
fa0f281c | 890 | |
195466dc JF |
891 | #include <asm-generic/pgtable.h> |
892 | #endif /* __ASSEMBLY__ */ | |
893 | ||
1965aae3 | 894 | #endif /* _ASM_X86_PGTABLE_H */ |