Commit | Line | Data |
---|---|---|
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 | */ | |
d85f3334 JG |
12 | #define pgprot_noncached(prot) \ |
13 | ((boot_cpu_data.x86 > 3) \ | |
14 | ? (__pgprot(pgprot_val(prot) | \ | |
15 | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS))) \ | |
8a7b12f7 | 16 | : (prot)) |
17 | ||
4614139c | 18 | #ifndef __ASSEMBLY__ |
55a6ca25 PA |
19 | #include <asm/x86_init.h> |
20 | ||
ef6bea6d | 21 | void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd); |
e1a58320 SS |
22 | void ptdump_walk_pgd_level_checkwx(void); |
23 | ||
24 | #ifdef CONFIG_DEBUG_WX | |
25 | #define debug_checkwx() ptdump_walk_pgd_level_checkwx() | |
26 | #else | |
27 | #define debug_checkwx() do { } while (0) | |
28 | #endif | |
ef6bea6d | 29 | |
8405b122 JF |
30 | /* |
31 | * ZERO_PAGE is a global shared page that is always zero: used | |
32 | * for zero-mapped memory areas etc.. | |
33 | */ | |
277d5b40 AK |
34 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] |
35 | __visible; | |
8405b122 JF |
36 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
37 | ||
e3ed910d JF |
38 | extern spinlock_t pgd_lock; |
39 | extern struct list_head pgd_list; | |
8405b122 | 40 | |
617d34d9 JF |
41 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
42 | ||
54321d94 JF |
43 | #ifdef CONFIG_PARAVIRT |
44 | #include <asm/paravirt.h> | |
45 | #else /* !CONFIG_PARAVIRT */ | |
46 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
47 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
2609ae6d | 48 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
54321d94 | 49 | |
54321d94 JF |
50 | #define set_pte_atomic(ptep, pte) \ |
51 | native_set_pte_atomic(ptep, pte) | |
52 | ||
53 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
54 | ||
55 | #ifndef __PAGETABLE_PUD_FOLDED | |
56 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
57 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
58 | #endif | |
59 | ||
60 | #ifndef set_pud | |
61 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
62 | #endif | |
63 | ||
64 | #ifndef __PAGETABLE_PMD_FOLDED | |
65 | #define pud_clear(pud) native_pud_clear(pud) | |
66 | #endif | |
67 | ||
68 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
69 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
70 | ||
71 | #define pte_update(mm, addr, ptep) do { } while (0) | |
54321d94 | 72 | |
54321d94 JF |
73 | #define pgd_val(x) native_pgd_val(x) |
74 | #define __pgd(x) native_make_pgd(x) | |
75 | ||
76 | #ifndef __PAGETABLE_PUD_FOLDED | |
77 | #define pud_val(x) native_pud_val(x) | |
78 | #define __pud(x) native_make_pud(x) | |
79 | #endif | |
80 | ||
81 | #ifndef __PAGETABLE_PMD_FOLDED | |
82 | #define pmd_val(x) native_pmd_val(x) | |
83 | #define __pmd(x) native_make_pmd(x) | |
84 | #endif | |
85 | ||
86 | #define pte_val(x) native_pte_val(x) | |
87 | #define __pte(x) native_make_pte(x) | |
88 | ||
224101ed JF |
89 | #define arch_end_context_switch(prev) do {} while(0) |
90 | ||
54321d94 JF |
91 | #endif /* CONFIG_PARAVIRT */ |
92 | ||
4614139c JF |
93 | /* |
94 | * The following only work if pte_present() is true. | |
95 | * Undefined behaviour if not.. | |
96 | */ | |
3cbaeafe JP |
97 | static inline int pte_dirty(pte_t pte) |
98 | { | |
a15af1c9 | 99 | return pte_flags(pte) & _PAGE_DIRTY; |
3cbaeafe JP |
100 | } |
101 | ||
102 | static inline int pte_young(pte_t pte) | |
103 | { | |
a15af1c9 | 104 | return pte_flags(pte) & _PAGE_ACCESSED; |
3cbaeafe JP |
105 | } |
106 | ||
c164e038 KS |
107 | static inline int pmd_dirty(pmd_t pmd) |
108 | { | |
109 | return pmd_flags(pmd) & _PAGE_DIRTY; | |
110 | } | |
3cbaeafe | 111 | |
f2d6bfe9 JW |
112 | static inline int pmd_young(pmd_t pmd) |
113 | { | |
114 | return pmd_flags(pmd) & _PAGE_ACCESSED; | |
115 | } | |
116 | ||
3cbaeafe JP |
117 | static inline int pte_write(pte_t pte) |
118 | { | |
a15af1c9 | 119 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
120 | } |
121 | ||
3cbaeafe JP |
122 | static inline int pte_huge(pte_t pte) |
123 | { | |
a15af1c9 | 124 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
125 | } |
126 | ||
3cbaeafe JP |
127 | static inline int pte_global(pte_t pte) |
128 | { | |
a15af1c9 | 129 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
130 | } |
131 | ||
132 | static inline int pte_exec(pte_t pte) | |
133 | { | |
a15af1c9 | 134 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
135 | } |
136 | ||
7e675137 NP |
137 | static inline int pte_special(pte_t pte) |
138 | { | |
c819f37e | 139 | return pte_flags(pte) & _PAGE_SPECIAL; |
7e675137 NP |
140 | } |
141 | ||
91030ca1 HD |
142 | static inline unsigned long pte_pfn(pte_t pte) |
143 | { | |
144 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
145 | } | |
146 | ||
087975b0 AM |
147 | static inline unsigned long pmd_pfn(pmd_t pmd) |
148 | { | |
f70abb0f | 149 | return (pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT; |
087975b0 AM |
150 | } |
151 | ||
0ee364eb MG |
152 | static inline unsigned long pud_pfn(pud_t pud) |
153 | { | |
f70abb0f | 154 | return (pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT; |
0ee364eb MG |
155 | } |
156 | ||
91030ca1 HD |
157 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
158 | ||
3cbaeafe JP |
159 | static inline int pmd_large(pmd_t pte) |
160 | { | |
027ef6c8 | 161 | return pmd_flags(pte) & _PAGE_PSE; |
3cbaeafe JP |
162 | } |
163 | ||
f2d6bfe9 JW |
164 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
165 | static inline int pmd_trans_splitting(pmd_t pmd) | |
166 | { | |
167 | return pmd_val(pmd) & _PAGE_SPLITTING; | |
168 | } | |
169 | ||
170 | static inline int pmd_trans_huge(pmd_t pmd) | |
171 | { | |
172 | return pmd_val(pmd) & _PAGE_PSE; | |
173 | } | |
4b7167b9 AA |
174 | |
175 | static inline int has_transparent_hugepage(void) | |
176 | { | |
177 | return cpu_has_pse; | |
178 | } | |
f2d6bfe9 JW |
179 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
180 | ||
6522869c JF |
181 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
182 | { | |
183 | pteval_t v = native_pte_val(pte); | |
184 | ||
185 | return native_make_pte(v | set); | |
186 | } | |
187 | ||
188 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
189 | { | |
190 | pteval_t v = native_pte_val(pte); | |
191 | ||
192 | return native_make_pte(v & ~clear); | |
193 | } | |
194 | ||
3cbaeafe JP |
195 | static inline pte_t pte_mkclean(pte_t pte) |
196 | { | |
6522869c | 197 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
198 | } |
199 | ||
200 | static inline pte_t pte_mkold(pte_t pte) | |
201 | { | |
6522869c | 202 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
203 | } |
204 | ||
205 | static inline pte_t pte_wrprotect(pte_t pte) | |
206 | { | |
6522869c | 207 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
208 | } |
209 | ||
210 | static inline pte_t pte_mkexec(pte_t pte) | |
211 | { | |
6522869c | 212 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
213 | } |
214 | ||
215 | static inline pte_t pte_mkdirty(pte_t pte) | |
216 | { | |
0f8975ec | 217 | return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
3cbaeafe JP |
218 | } |
219 | ||
220 | static inline pte_t pte_mkyoung(pte_t pte) | |
221 | { | |
6522869c | 222 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
223 | } |
224 | ||
225 | static inline pte_t pte_mkwrite(pte_t pte) | |
226 | { | |
6522869c | 227 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
228 | } |
229 | ||
230 | static inline pte_t pte_mkhuge(pte_t pte) | |
231 | { | |
6522869c | 232 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
233 | } |
234 | ||
235 | static inline pte_t pte_clrhuge(pte_t pte) | |
236 | { | |
6522869c | 237 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
238 | } |
239 | ||
240 | static inline pte_t pte_mkglobal(pte_t pte) | |
241 | { | |
6522869c | 242 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
243 | } |
244 | ||
245 | static inline pte_t pte_clrglobal(pte_t pte) | |
246 | { | |
6522869c | 247 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 248 | } |
4614139c | 249 | |
7e675137 NP |
250 | static inline pte_t pte_mkspecial(pte_t pte) |
251 | { | |
6522869c | 252 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
253 | } |
254 | ||
f2d6bfe9 JW |
255 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
256 | { | |
257 | pmdval_t v = native_pmd_val(pmd); | |
258 | ||
259 | return __pmd(v | set); | |
260 | } | |
261 | ||
262 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) | |
263 | { | |
264 | pmdval_t v = native_pmd_val(pmd); | |
265 | ||
266 | return __pmd(v & ~clear); | |
267 | } | |
268 | ||
269 | static inline pmd_t pmd_mkold(pmd_t pmd) | |
270 | { | |
271 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); | |
272 | } | |
273 | ||
274 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
275 | { | |
276 | return pmd_clear_flags(pmd, _PAGE_RW); | |
277 | } | |
278 | ||
279 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
280 | { | |
0f8975ec | 281 | return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
f2d6bfe9 JW |
282 | } |
283 | ||
284 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
285 | { | |
286 | return pmd_set_flags(pmd, _PAGE_PSE); | |
287 | } | |
288 | ||
289 | static inline pmd_t pmd_mkyoung(pmd_t pmd) | |
290 | { | |
291 | return pmd_set_flags(pmd, _PAGE_ACCESSED); | |
292 | } | |
293 | ||
294 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
295 | { | |
296 | return pmd_set_flags(pmd, _PAGE_RW); | |
297 | } | |
298 | ||
299 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) | |
300 | { | |
21d9ee3e | 301 | return pmd_clear_flags(pmd, _PAGE_PRESENT | _PAGE_PROTNONE); |
f2d6bfe9 JW |
302 | } |
303 | ||
2bf01f9f | 304 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
0f8975ec PE |
305 | static inline int pte_soft_dirty(pte_t pte) |
306 | { | |
307 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; | |
308 | } | |
309 | ||
310 | static inline int pmd_soft_dirty(pmd_t pmd) | |
311 | { | |
312 | return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; | |
313 | } | |
314 | ||
315 | static inline pte_t pte_mksoft_dirty(pte_t pte) | |
316 | { | |
317 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); | |
318 | } | |
319 | ||
320 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) | |
321 | { | |
322 | return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); | |
323 | } | |
324 | ||
a7b76174 MS |
325 | static inline pte_t pte_clear_soft_dirty(pte_t pte) |
326 | { | |
327 | return pte_clear_flags(pte, _PAGE_SOFT_DIRTY); | |
328 | } | |
329 | ||
330 | static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) | |
331 | { | |
332 | return pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY); | |
333 | } | |
334 | ||
2bf01f9f CG |
335 | #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
336 | ||
b534816b JF |
337 | /* |
338 | * Mask out unsupported bits in a present pgprot. Non-present pgprots | |
339 | * can use those bits for other purposes, so leave them be. | |
340 | */ | |
341 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) | |
342 | { | |
343 | pgprotval_t protval = pgprot_val(pgprot); | |
344 | ||
345 | if (protval & _PAGE_PRESENT) | |
346 | protval &= __supported_pte_mask; | |
347 | ||
348 | return protval; | |
349 | } | |
350 | ||
6fdc05d4 JF |
351 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
352 | { | |
b534816b JF |
353 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
354 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
355 | } |
356 | ||
357 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
358 | { | |
b534816b JF |
359 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
360 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
361 | } |
362 | ||
38472311 IM |
363 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
364 | { | |
365 | pteval_t val = pte_val(pte); | |
366 | ||
367 | /* | |
368 | * Chop off the NX bit (if present), and add the NX portion of | |
369 | * the newprot (if present): | |
370 | */ | |
1c12c4cf | 371 | val &= _PAGE_CHG_MASK; |
b534816b | 372 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
38472311 IM |
373 | |
374 | return __pte(val); | |
375 | } | |
376 | ||
c489f125 JW |
377 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
378 | { | |
379 | pmdval_t val = pmd_val(pmd); | |
380 | ||
381 | val &= _HPAGE_CHG_MASK; | |
382 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; | |
383 | ||
384 | return __pmd(val); | |
385 | } | |
386 | ||
1c12c4cf VP |
387 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
388 | #define pgprot_modify pgprot_modify | |
389 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
390 | { | |
391 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
392 | pgprotval_t addbits = pgprot_val(newprot); | |
393 | return __pgprot(preservebits | addbits); | |
394 | } | |
395 | ||
bbac8c6d TK |
396 | #define pte_pgprot(x) __pgprot(pte_flags(x)) |
397 | #define pmd_pgprot(x) __pgprot(pmd_flags(x)) | |
398 | #define pud_pgprot(x) __pgprot(pud_flags(x)) | |
c6ca18eb | 399 | |
b534816b | 400 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
1e8e23bc | 401 | |
1adcaafe | 402 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
d85f3334 JG |
403 | enum page_cache_mode pcm, |
404 | enum page_cache_mode new_pcm) | |
afc7d20c | 405 | { |
1adcaafe | 406 | /* |
55a6ca25 | 407 | * PAT type is always WB for untracked ranges, so no need to check. |
1adcaafe | 408 | */ |
8a271389 | 409 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
1adcaafe SS |
410 | return 1; |
411 | ||
afc7d20c | 412 | /* |
413 | * Certain new memtypes are not allowed with certain | |
414 | * requested memtype: | |
415 | * - request is uncached, return cannot be write-back | |
416 | * - request is write-combine, return cannot be write-back | |
ecb2feba TK |
417 | * - request is write-through, return cannot be write-back |
418 | * - request is write-through, return cannot be write-combine | |
afc7d20c | 419 | */ |
d85f3334 JG |
420 | if ((pcm == _PAGE_CACHE_MODE_UC_MINUS && |
421 | new_pcm == _PAGE_CACHE_MODE_WB) || | |
422 | (pcm == _PAGE_CACHE_MODE_WC && | |
ecb2feba TK |
423 | new_pcm == _PAGE_CACHE_MODE_WB) || |
424 | (pcm == _PAGE_CACHE_MODE_WT && | |
425 | new_pcm == _PAGE_CACHE_MODE_WB) || | |
426 | (pcm == _PAGE_CACHE_MODE_WT && | |
427 | new_pcm == _PAGE_CACHE_MODE_WC)) { | |
afc7d20c | 428 | return 0; |
429 | } | |
430 | ||
431 | return 1; | |
432 | } | |
433 | ||
458a3e64 TH |
434 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
435 | pte_t *populate_extra_pte(unsigned long vaddr); | |
4614139c JF |
436 | #endif /* __ASSEMBLY__ */ |
437 | ||
96a388de | 438 | #ifdef CONFIG_X86_32 |
a1ce3928 | 439 | # include <asm/pgtable_32.h> |
96a388de | 440 | #else |
a1ce3928 | 441 | # include <asm/pgtable_64.h> |
96a388de | 442 | #endif |
6c386655 | 443 | |
aca159db | 444 | #ifndef __ASSEMBLY__ |
f476961c | 445 | #include <linux/mm_types.h> |
fa0f281c | 446 | #include <linux/mmdebug.h> |
4cbeb51b | 447 | #include <linux/log2.h> |
aca159db | 448 | |
a034a010 JF |
449 | static inline int pte_none(pte_t pte) |
450 | { | |
451 | return !pte.pte; | |
452 | } | |
453 | ||
8de01da3 JF |
454 | #define __HAVE_ARCH_PTE_SAME |
455 | static inline int pte_same(pte_t a, pte_t b) | |
456 | { | |
457 | return a.pte == b.pte; | |
458 | } | |
459 | ||
7c683851 | 460 | static inline int pte_present(pte_t a) |
c46a7c81 MG |
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 | ||
21d9ee3e | 471 | if ((pte_flags(a) & _PAGE_PROTNONE) && |
20841405 RR |
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 | */ | |
21d9ee3e | 491 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); |
649e8ef6 JF |
492 | } |
493 | ||
e7bb4b6d MG |
494 | #ifdef CONFIG_NUMA_BALANCING |
495 | /* | |
496 | * These work without NUMA balancing but the kernel does not care. See the | |
497 | * comment in include/asm-generic/pgtable.h | |
498 | */ | |
499 | static inline int pte_protnone(pte_t pte) | |
500 | { | |
e3a1f6ca DV |
501 | return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
502 | == _PAGE_PROTNONE; | |
e7bb4b6d MG |
503 | } |
504 | ||
505 | static inline int pmd_protnone(pmd_t pmd) | |
506 | { | |
e3a1f6ca DV |
507 | return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
508 | == _PAGE_PROTNONE; | |
e7bb4b6d MG |
509 | } |
510 | #endif /* CONFIG_NUMA_BALANCING */ | |
511 | ||
4fea801a JF |
512 | static inline int pmd_none(pmd_t pmd) |
513 | { | |
514 | /* Only check low word on 32-bit platforms, since it might be | |
515 | out of sync with upper half. */ | |
26c8e317 | 516 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
517 | } |
518 | ||
3ffb3564 JF |
519 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
520 | { | |
f70abb0f | 521 | return (unsigned long)__va(pmd_val(pmd) & pmd_pfn_mask(pmd)); |
3ffb3564 JF |
522 | } |
523 | ||
e5f7f202 IM |
524 | /* |
525 | * Currently stuck as a macro due to indirect forward reference to | |
526 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
527 | */ | |
f70abb0f TK |
528 | #define pmd_page(pmd) \ |
529 | pfn_to_page((pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT) | |
20063ca4 | 530 | |
e24d7eee JF |
531 | /* |
532 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
533 | * | |
534 | * this macro returns the index of the entry in the pmd page which would | |
535 | * control the given virtual address | |
536 | */ | |
ce0c0f9e | 537 | static inline unsigned long pmd_index(unsigned long address) |
e24d7eee JF |
538 | { |
539 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
540 | } | |
541 | ||
97e2817d JF |
542 | /* |
543 | * Conversion functions: convert a page and protection to a page entry, | |
544 | * and a page entry and page directory to the page they refer to. | |
545 | * | |
546 | * (Currently stuck as a macro because of indirect forward reference | |
547 | * to linux/mm.h:page_to_nid()) | |
548 | */ | |
549 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
550 | ||
346309cf JF |
551 | /* |
552 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
553 | * | |
554 | * this function returns the index of the entry in the pte page which would | |
555 | * control the given virtual address | |
556 | */ | |
ce0c0f9e | 557 | static inline unsigned long pte_index(unsigned long address) |
346309cf JF |
558 | { |
559 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
560 | } | |
561 | ||
3fbc2444 JF |
562 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
563 | { | |
564 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
565 | } | |
566 | ||
99510238 JF |
567 | static inline int pmd_bad(pmd_t pmd) |
568 | { | |
18a7a199 | 569 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
570 | } |
571 | ||
cc290ca3 JF |
572 | static inline unsigned long pages_to_mb(unsigned long npg) |
573 | { | |
574 | return npg >> (20 - PAGE_SHIFT); | |
575 | } | |
576 | ||
98233368 | 577 | #if CONFIG_PGTABLE_LEVELS > 2 |
deb79cfb JF |
578 | static inline int pud_none(pud_t pud) |
579 | { | |
26c8e317 | 580 | return native_pud_val(pud) == 0; |
deb79cfb JF |
581 | } |
582 | ||
5ba7c913 JF |
583 | static inline int pud_present(pud_t pud) |
584 | { | |
18a7a199 | 585 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 586 | } |
6fff47e3 JF |
587 | |
588 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
589 | { | |
f70abb0f | 590 | return (unsigned long)__va(pud_val(pud) & pud_pfn_mask(pud)); |
6fff47e3 | 591 | } |
f476961c | 592 | |
e5f7f202 IM |
593 | /* |
594 | * Currently stuck as a macro due to indirect forward reference to | |
595 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
596 | */ | |
f70abb0f TK |
597 | #define pud_page(pud) \ |
598 | pfn_to_page((pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT) | |
01ade20d JF |
599 | |
600 | /* Find an entry in the second-level page table.. */ | |
601 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
602 | { | |
603 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
604 | } | |
3180fba0 | 605 | |
3f6cbef1 JF |
606 | static inline int pud_large(pud_t pud) |
607 | { | |
e2f5bda9 | 608 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
609 | (_PAGE_PSE | _PAGE_PRESENT); |
610 | } | |
a61bb29a JF |
611 | |
612 | static inline int pud_bad(pud_t pud) | |
613 | { | |
18a7a199 | 614 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 615 | } |
e2f5bda9 JF |
616 | #else |
617 | static inline int pud_large(pud_t pud) | |
618 | { | |
619 | return 0; | |
620 | } | |
98233368 | 621 | #endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
5ba7c913 | 622 | |
98233368 | 623 | #if CONFIG_PGTABLE_LEVELS > 3 |
9f38d7e8 JF |
624 | static inline int pgd_present(pgd_t pgd) |
625 | { | |
18a7a199 | 626 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 627 | } |
c5f040b1 JF |
628 | |
629 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
630 | { | |
631 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
632 | } | |
777cba16 | 633 | |
e5f7f202 IM |
634 | /* |
635 | * Currently stuck as a macro due to indirect forward reference to | |
636 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
637 | */ | |
638 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
639 | |
640 | /* to find an entry in a page-table-directory. */ | |
ce0c0f9e | 641 | static inline unsigned long pud_index(unsigned long address) |
7cfb8102 JF |
642 | { |
643 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
644 | } | |
3d081b18 JF |
645 | |
646 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
647 | { | |
648 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
649 | } | |
30f10316 JF |
650 | |
651 | static inline int pgd_bad(pgd_t pgd) | |
652 | { | |
18a7a199 | 653 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 654 | } |
7325cc2e JF |
655 | |
656 | static inline int pgd_none(pgd_t pgd) | |
657 | { | |
26c8e317 | 658 | return !native_pgd_val(pgd); |
7325cc2e | 659 | } |
98233368 | 660 | #endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
9f38d7e8 | 661 | |
4614139c JF |
662 | #endif /* __ASSEMBLY__ */ |
663 | ||
fb15a9b3 JF |
664 | /* |
665 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
666 | * | |
667 | * this macro returns the index of the entry in the pgd page which would | |
668 | * control the given virtual address | |
669 | */ | |
670 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
671 | ||
672 | /* | |
673 | * pgd_offset() returns a (pgd_t *) | |
674 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
675 | */ | |
676 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
677 | /* | |
678 | * a shortcut which implies the use of the kernel's pgd, instead | |
679 | * of a process's | |
680 | */ | |
681 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
682 | ||
683 | ||
68db065c JF |
684 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
685 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
686 | ||
195466dc JF |
687 | #ifndef __ASSEMBLY__ |
688 | ||
2c1b284e | 689 | extern int direct_gbpages; |
22ddfcaa | 690 | void init_mem_mapping(void); |
8d57470d | 691 | void early_alloc_pgt_buf(void); |
2c1b284e | 692 | |
4891645e JF |
693 | /* local pte updates need not use xchg for locking */ |
694 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
695 | { | |
696 | pte_t res = *ptep; | |
697 | ||
698 | /* Pure native function needs no input for mm, addr */ | |
699 | native_pte_clear(NULL, 0, ptep); | |
700 | return res; | |
701 | } | |
702 | ||
f2d6bfe9 JW |
703 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
704 | { | |
705 | pmd_t res = *pmdp; | |
706 | ||
707 | native_pmd_clear(pmdp); | |
708 | return res; | |
709 | } | |
710 | ||
4891645e JF |
711 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
712 | pte_t *ptep , pte_t pte) | |
713 | { | |
714 | native_set_pte(ptep, pte); | |
715 | } | |
716 | ||
0a47de52 AA |
717 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
718 | pmd_t *pmdp , pmd_t pmd) | |
719 | { | |
720 | native_set_pmd(pmdp, pmd); | |
721 | } | |
722 | ||
195466dc JF |
723 | #ifndef CONFIG_PARAVIRT |
724 | /* | |
725 | * Rules for using pte_update - it must be called after any PTE update which | |
726 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
727 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
728 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
729 | * transitions, which means this hook should only be called for user PTEs. | |
730 | * This hook implies a P->P protection or access change has taken place, which | |
d6ccc3ec | 731 | * requires a subsequent TLB flush. |
195466dc JF |
732 | */ |
733 | #define pte_update(mm, addr, ptep) do { } while (0) | |
195466dc JF |
734 | #endif |
735 | ||
195466dc JF |
736 | /* |
737 | * We only update the dirty/accessed state if we set | |
738 | * the dirty bit by hand in the kernel, since the hardware | |
739 | * will do the accessed bit for us, and we don't want to | |
740 | * race with other CPU's that might be updating the dirty | |
741 | * bit at the same time. | |
742 | */ | |
bea41808 JF |
743 | struct vm_area_struct; |
744 | ||
195466dc | 745 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
746 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
747 | unsigned long address, pte_t *ptep, | |
748 | pte_t entry, int dirty); | |
195466dc JF |
749 | |
750 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
751 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
752 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
753 | |
754 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
755 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
756 | unsigned long address, pte_t *ptep); | |
195466dc JF |
757 | |
758 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
759 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
760 | pte_t *ptep) | |
195466dc JF |
761 | { |
762 | pte_t pte = native_ptep_get_and_clear(ptep); | |
763 | pte_update(mm, addr, ptep); | |
764 | return pte; | |
765 | } | |
766 | ||
767 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
768 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
769 | unsigned long addr, pte_t *ptep, | |
770 | int full) | |
195466dc JF |
771 | { |
772 | pte_t pte; | |
773 | if (full) { | |
774 | /* | |
775 | * Full address destruction in progress; paravirt does not | |
776 | * care about updates and native needs no locking | |
777 | */ | |
778 | pte = native_local_ptep_get_and_clear(ptep); | |
779 | } else { | |
780 | pte = ptep_get_and_clear(mm, addr, ptep); | |
781 | } | |
782 | return pte; | |
783 | } | |
784 | ||
785 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
786 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
787 | unsigned long addr, pte_t *ptep) | |
195466dc | 788 | { |
d8d89827 | 789 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
790 | pte_update(mm, addr, ptep); |
791 | } | |
792 | ||
2ac13462 | 793 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
61c77326 | 794 | |
f2d6bfe9 JW |
795 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
796 | ||
797 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS | |
798 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, | |
799 | unsigned long address, pmd_t *pmdp, | |
800 | pmd_t entry, int dirty); | |
801 | ||
802 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG | |
803 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, | |
804 | unsigned long addr, pmd_t *pmdp); | |
805 | ||
806 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH | |
807 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, | |
808 | unsigned long address, pmd_t *pmdp); | |
809 | ||
810 | ||
811 | #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH | |
812 | extern void pmdp_splitting_flush(struct vm_area_struct *vma, | |
813 | unsigned long addr, pmd_t *pmdp); | |
814 | ||
815 | #define __HAVE_ARCH_PMD_WRITE | |
816 | static inline int pmd_write(pmd_t pmd) | |
817 | { | |
818 | return pmd_flags(pmd) & _PAGE_RW; | |
819 | } | |
820 | ||
8809aa2d AK |
821 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
822 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
f2d6bfe9 JW |
823 | pmd_t *pmdp) |
824 | { | |
d6ccc3ec | 825 | return native_pmdp_get_and_clear(pmdp); |
f2d6bfe9 JW |
826 | } |
827 | ||
828 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT | |
829 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, | |
830 | unsigned long addr, pmd_t *pmdp) | |
831 | { | |
832 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); | |
f2d6bfe9 JW |
833 | } |
834 | ||
85958b46 JF |
835 | /* |
836 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
837 | * | |
838 | * dst - pointer to pgd range anwhere on a pgd page | |
839 | * src - "" | |
840 | * count - the number of pgds to copy. | |
841 | * | |
842 | * dst and src can be on the same page, but the range must not overlap, | |
843 | * and must not cross a page boundary. | |
844 | */ | |
845 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
846 | { | |
847 | memcpy(dst, src, count * sizeof(pgd_t)); | |
848 | } | |
849 | ||
4cbeb51b DH |
850 | #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
851 | static inline int page_level_shift(enum pg_level level) | |
852 | { | |
853 | return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; | |
854 | } | |
855 | static inline unsigned long page_level_size(enum pg_level level) | |
856 | { | |
857 | return 1UL << page_level_shift(level); | |
858 | } | |
859 | static inline unsigned long page_level_mask(enum pg_level level) | |
860 | { | |
861 | return ~(page_level_size(level) - 1); | |
862 | } | |
85958b46 | 863 | |
602e0186 KS |
864 | /* |
865 | * The x86 doesn't have any external MMU info: the kernel page | |
866 | * tables contain all the necessary information. | |
867 | */ | |
868 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
869 | unsigned long addr, pte_t *ptep) | |
870 | { | |
871 | } | |
872 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, | |
873 | unsigned long addr, pmd_t *pmd) | |
874 | { | |
875 | } | |
85958b46 | 876 | |
2bf01f9f | 877 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
fa0f281c CG |
878 | static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
879 | { | |
fa0f281c CG |
880 | return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
881 | } | |
882 | ||
883 | static inline int pte_swp_soft_dirty(pte_t pte) | |
884 | { | |
fa0f281c CG |
885 | return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; |
886 | } | |
887 | ||
888 | static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) | |
889 | { | |
fa0f281c CG |
890 | return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
891 | } | |
2bf01f9f | 892 | #endif |
fa0f281c | 893 | |
195466dc JF |
894 | #include <asm-generic/pgtable.h> |
895 | #endif /* __ASSEMBLY__ */ | |
896 | ||
1965aae3 | 897 | #endif /* _ASM_X86_PGTABLE_H */ |