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1965aae3 PA |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
6c386655 | 3 | |
c47c1b1f IM |
4 | #include <asm/page.h> |
5 | ||
8d19c99f | 6 | #include <asm/pgtable_types.h> |
b2bc2731 | 7 | |
8a7b12f7 | 8 | /* |
9 | * Macro to mark a page protection value as UC- | |
10 | */ | |
11 | #define pgprot_noncached(prot) \ | |
12 | ((boot_cpu_data.x86 > 3) \ | |
13 | ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ | |
14 | : (prot)) | |
15 | ||
4614139c | 16 | #ifndef __ASSEMBLY__ |
195466dc | 17 | |
8405b122 JF |
18 | /* |
19 | * ZERO_PAGE is a global shared page that is always zero: used | |
20 | * for zero-mapped memory areas etc.. | |
21 | */ | |
3cbaeafe | 22 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
8405b122 JF |
23 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
24 | ||
e3ed910d JF |
25 | extern spinlock_t pgd_lock; |
26 | extern struct list_head pgd_list; | |
8405b122 | 27 | |
54321d94 JF |
28 | #ifdef CONFIG_PARAVIRT |
29 | #include <asm/paravirt.h> | |
30 | #else /* !CONFIG_PARAVIRT */ | |
31 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
32 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
33 | ||
54321d94 JF |
34 | #define set_pte_atomic(ptep, pte) \ |
35 | native_set_pte_atomic(ptep, pte) | |
36 | ||
37 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
38 | ||
39 | #ifndef __PAGETABLE_PUD_FOLDED | |
40 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
41 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
42 | #endif | |
43 | ||
44 | #ifndef set_pud | |
45 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
46 | #endif | |
47 | ||
48 | #ifndef __PAGETABLE_PMD_FOLDED | |
49 | #define pud_clear(pud) native_pud_clear(pud) | |
50 | #endif | |
51 | ||
52 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
53 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
54 | ||
55 | #define pte_update(mm, addr, ptep) do { } while (0) | |
56 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
57 | ||
58 | static inline void __init paravirt_pagetable_setup_start(pgd_t *base) | |
59 | { | |
60 | native_pagetable_setup_start(base); | |
61 | } | |
62 | ||
63 | static inline void __init paravirt_pagetable_setup_done(pgd_t *base) | |
64 | { | |
65 | native_pagetable_setup_done(base); | |
66 | } | |
67 | ||
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 | ||
102 | static inline int pte_write(pte_t pte) | |
103 | { | |
a15af1c9 | 104 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
105 | } |
106 | ||
107 | static inline int pte_file(pte_t pte) | |
108 | { | |
a15af1c9 | 109 | return pte_flags(pte) & _PAGE_FILE; |
3cbaeafe JP |
110 | } |
111 | ||
112 | static inline int pte_huge(pte_t pte) | |
113 | { | |
a15af1c9 | 114 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
115 | } |
116 | ||
3cbaeafe JP |
117 | static inline int pte_global(pte_t pte) |
118 | { | |
a15af1c9 | 119 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
120 | } |
121 | ||
122 | static inline int pte_exec(pte_t pte) | |
123 | { | |
a15af1c9 | 124 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
125 | } |
126 | ||
7e675137 NP |
127 | static inline int pte_special(pte_t pte) |
128 | { | |
606ee44d | 129 | return pte_flags(pte) & _PAGE_SPECIAL; |
7e675137 NP |
130 | } |
131 | ||
91030ca1 HD |
132 | static inline unsigned long pte_pfn(pte_t pte) |
133 | { | |
134 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
135 | } | |
136 | ||
137 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) | |
138 | ||
3cbaeafe JP |
139 | static inline int pmd_large(pmd_t pte) |
140 | { | |
18a7a199 | 141 | return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3cbaeafe JP |
142 | (_PAGE_PSE | _PAGE_PRESENT); |
143 | } | |
144 | ||
6522869c JF |
145 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
146 | { | |
147 | pteval_t v = native_pte_val(pte); | |
148 | ||
149 | return native_make_pte(v | set); | |
150 | } | |
151 | ||
152 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
153 | { | |
154 | pteval_t v = native_pte_val(pte); | |
155 | ||
156 | return native_make_pte(v & ~clear); | |
157 | } | |
158 | ||
3cbaeafe JP |
159 | static inline pte_t pte_mkclean(pte_t pte) |
160 | { | |
6522869c | 161 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
162 | } |
163 | ||
164 | static inline pte_t pte_mkold(pte_t pte) | |
165 | { | |
6522869c | 166 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
167 | } |
168 | ||
169 | static inline pte_t pte_wrprotect(pte_t pte) | |
170 | { | |
6522869c | 171 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
172 | } |
173 | ||
174 | static inline pte_t pte_mkexec(pte_t pte) | |
175 | { | |
6522869c | 176 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
177 | } |
178 | ||
179 | static inline pte_t pte_mkdirty(pte_t pte) | |
180 | { | |
6522869c | 181 | return pte_set_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
182 | } |
183 | ||
184 | static inline pte_t pte_mkyoung(pte_t pte) | |
185 | { | |
6522869c | 186 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
187 | } |
188 | ||
189 | static inline pte_t pte_mkwrite(pte_t pte) | |
190 | { | |
6522869c | 191 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
192 | } |
193 | ||
194 | static inline pte_t pte_mkhuge(pte_t pte) | |
195 | { | |
6522869c | 196 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
197 | } |
198 | ||
199 | static inline pte_t pte_clrhuge(pte_t pte) | |
200 | { | |
6522869c | 201 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
202 | } |
203 | ||
204 | static inline pte_t pte_mkglobal(pte_t pte) | |
205 | { | |
6522869c | 206 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
207 | } |
208 | ||
209 | static inline pte_t pte_clrglobal(pte_t pte) | |
210 | { | |
6522869c | 211 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 212 | } |
4614139c | 213 | |
7e675137 NP |
214 | static inline pte_t pte_mkspecial(pte_t pte) |
215 | { | |
6522869c | 216 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
217 | } |
218 | ||
b534816b JF |
219 | /* |
220 | * Mask out unsupported bits in a present pgprot. Non-present pgprots | |
221 | * can use those bits for other purposes, so leave them be. | |
222 | */ | |
223 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) | |
224 | { | |
225 | pgprotval_t protval = pgprot_val(pgprot); | |
226 | ||
227 | if (protval & _PAGE_PRESENT) | |
228 | protval &= __supported_pte_mask; | |
229 | ||
230 | return protval; | |
231 | } | |
232 | ||
6fdc05d4 JF |
233 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
234 | { | |
b534816b JF |
235 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
236 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
237 | } |
238 | ||
239 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
240 | { | |
b534816b JF |
241 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
242 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
243 | } |
244 | ||
38472311 IM |
245 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
246 | { | |
247 | pteval_t val = pte_val(pte); | |
248 | ||
249 | /* | |
250 | * Chop off the NX bit (if present), and add the NX portion of | |
251 | * the newprot (if present): | |
252 | */ | |
1c12c4cf | 253 | val &= _PAGE_CHG_MASK; |
b534816b | 254 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
38472311 IM |
255 | |
256 | return __pte(val); | |
257 | } | |
258 | ||
1c12c4cf VP |
259 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
260 | #define pgprot_modify pgprot_modify | |
261 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
262 | { | |
263 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
264 | pgprotval_t addbits = pgprot_val(newprot); | |
265 | return __pgprot(preservebits | addbits); | |
266 | } | |
267 | ||
77be1fab | 268 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 269 | |
b534816b | 270 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
1e8e23bc | 271 | |
afc7d20c | 272 | static inline int is_new_memtype_allowed(unsigned long flags, |
273 | unsigned long new_flags) | |
274 | { | |
275 | /* | |
276 | * Certain new memtypes are not allowed with certain | |
277 | * requested memtype: | |
278 | * - request is uncached, return cannot be write-back | |
279 | * - request is write-combine, return cannot be write-back | |
280 | */ | |
281 | if ((flags == _PAGE_CACHE_UC_MINUS && | |
282 | new_flags == _PAGE_CACHE_WB) || | |
283 | (flags == _PAGE_CACHE_WC && | |
284 | new_flags == _PAGE_CACHE_WB)) { | |
285 | return 0; | |
286 | } | |
287 | ||
288 | return 1; | |
289 | } | |
290 | ||
458a3e64 TH |
291 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
292 | pte_t *populate_extra_pte(unsigned long vaddr); | |
4614139c JF |
293 | #endif /* __ASSEMBLY__ */ |
294 | ||
96a388de TG |
295 | #ifdef CONFIG_X86_32 |
296 | # include "pgtable_32.h" | |
297 | #else | |
298 | # include "pgtable_64.h" | |
299 | #endif | |
6c386655 | 300 | |
aca159db | 301 | #ifndef __ASSEMBLY__ |
f476961c | 302 | #include <linux/mm_types.h> |
aca159db | 303 | |
a034a010 JF |
304 | static inline int pte_none(pte_t pte) |
305 | { | |
306 | return !pte.pte; | |
307 | } | |
308 | ||
8de01da3 JF |
309 | #define __HAVE_ARCH_PTE_SAME |
310 | static inline int pte_same(pte_t a, pte_t b) | |
311 | { | |
312 | return a.pte == b.pte; | |
313 | } | |
314 | ||
7c683851 JF |
315 | static inline int pte_present(pte_t a) |
316 | { | |
317 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); | |
318 | } | |
319 | ||
eb63657e | 320 | static inline int pte_hidden(pte_t pte) |
dfec072e | 321 | { |
eb63657e | 322 | return pte_flags(pte) & _PAGE_HIDDEN; |
dfec072e VN |
323 | } |
324 | ||
649e8ef6 JF |
325 | static inline int pmd_present(pmd_t pmd) |
326 | { | |
18a7a199 | 327 | return pmd_flags(pmd) & _PAGE_PRESENT; |
649e8ef6 JF |
328 | } |
329 | ||
4fea801a JF |
330 | static inline int pmd_none(pmd_t pmd) |
331 | { | |
332 | /* Only check low word on 32-bit platforms, since it might be | |
333 | out of sync with upper half. */ | |
26c8e317 | 334 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
335 | } |
336 | ||
3ffb3564 JF |
337 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
338 | { | |
339 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); | |
340 | } | |
341 | ||
e5f7f202 IM |
342 | /* |
343 | * Currently stuck as a macro due to indirect forward reference to | |
344 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
345 | */ | |
346 | #define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT) | |
20063ca4 | 347 | |
e24d7eee JF |
348 | /* |
349 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
350 | * | |
351 | * this macro returns the index of the entry in the pmd page which would | |
352 | * control the given virtual address | |
353 | */ | |
354 | static inline unsigned pmd_index(unsigned long address) | |
355 | { | |
356 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
357 | } | |
358 | ||
97e2817d JF |
359 | /* |
360 | * Conversion functions: convert a page and protection to a page entry, | |
361 | * and a page entry and page directory to the page they refer to. | |
362 | * | |
363 | * (Currently stuck as a macro because of indirect forward reference | |
364 | * to linux/mm.h:page_to_nid()) | |
365 | */ | |
366 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
367 | ||
346309cf JF |
368 | /* |
369 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
370 | * | |
371 | * this function returns the index of the entry in the pte page which would | |
372 | * control the given virtual address | |
373 | */ | |
374 | static inline unsigned pte_index(unsigned long address) | |
375 | { | |
376 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
377 | } | |
378 | ||
3fbc2444 JF |
379 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
380 | { | |
381 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
382 | } | |
383 | ||
99510238 JF |
384 | static inline int pmd_bad(pmd_t pmd) |
385 | { | |
18a7a199 | 386 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
387 | } |
388 | ||
cc290ca3 JF |
389 | static inline unsigned long pages_to_mb(unsigned long npg) |
390 | { | |
391 | return npg >> (20 - PAGE_SHIFT); | |
392 | } | |
393 | ||
6cf71500 JF |
394 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
395 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
396 | ||
5ba7c913 | 397 | #if PAGETABLE_LEVELS > 2 |
deb79cfb JF |
398 | static inline int pud_none(pud_t pud) |
399 | { | |
26c8e317 | 400 | return native_pud_val(pud) == 0; |
deb79cfb JF |
401 | } |
402 | ||
5ba7c913 JF |
403 | static inline int pud_present(pud_t pud) |
404 | { | |
18a7a199 | 405 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 406 | } |
6fff47e3 JF |
407 | |
408 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
409 | { | |
410 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); | |
411 | } | |
f476961c | 412 | |
e5f7f202 IM |
413 | /* |
414 | * Currently stuck as a macro due to indirect forward reference to | |
415 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
416 | */ | |
417 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) | |
01ade20d JF |
418 | |
419 | /* Find an entry in the second-level page table.. */ | |
420 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
421 | { | |
422 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
423 | } | |
3180fba0 JF |
424 | |
425 | static inline unsigned long pmd_pfn(pmd_t pmd) | |
426 | { | |
427 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
428 | } | |
3f6cbef1 JF |
429 | |
430 | static inline int pud_large(pud_t pud) | |
431 | { | |
e2f5bda9 | 432 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
433 | (_PAGE_PSE | _PAGE_PRESENT); |
434 | } | |
a61bb29a JF |
435 | |
436 | static inline int pud_bad(pud_t pud) | |
437 | { | |
18a7a199 | 438 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 439 | } |
e2f5bda9 JF |
440 | #else |
441 | static inline int pud_large(pud_t pud) | |
442 | { | |
443 | return 0; | |
444 | } | |
5ba7c913 JF |
445 | #endif /* PAGETABLE_LEVELS > 2 */ |
446 | ||
9f38d7e8 JF |
447 | #if PAGETABLE_LEVELS > 3 |
448 | static inline int pgd_present(pgd_t pgd) | |
449 | { | |
18a7a199 | 450 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 451 | } |
c5f040b1 JF |
452 | |
453 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
454 | { | |
455 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
456 | } | |
777cba16 | 457 | |
e5f7f202 IM |
458 | /* |
459 | * Currently stuck as a macro due to indirect forward reference to | |
460 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
461 | */ | |
462 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
463 | |
464 | /* to find an entry in a page-table-directory. */ | |
465 | static inline unsigned pud_index(unsigned long address) | |
466 | { | |
467 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
468 | } | |
3d081b18 JF |
469 | |
470 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
471 | { | |
472 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
473 | } | |
30f10316 JF |
474 | |
475 | static inline int pgd_bad(pgd_t pgd) | |
476 | { | |
18a7a199 | 477 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 478 | } |
7325cc2e JF |
479 | |
480 | static inline int pgd_none(pgd_t pgd) | |
481 | { | |
26c8e317 | 482 | return !native_pgd_val(pgd); |
7325cc2e | 483 | } |
9f38d7e8 JF |
484 | #endif /* PAGETABLE_LEVELS > 3 */ |
485 | ||
4614139c JF |
486 | #endif /* __ASSEMBLY__ */ |
487 | ||
fb15a9b3 JF |
488 | /* |
489 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
490 | * | |
491 | * this macro returns the index of the entry in the pgd page which would | |
492 | * control the given virtual address | |
493 | */ | |
494 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
495 | ||
496 | /* | |
497 | * pgd_offset() returns a (pgd_t *) | |
498 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
499 | */ | |
500 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
501 | /* | |
502 | * a shortcut which implies the use of the kernel's pgd, instead | |
503 | * of a process's | |
504 | */ | |
505 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
506 | ||
507 | ||
68db065c JF |
508 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
509 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
510 | ||
195466dc JF |
511 | #ifndef __ASSEMBLY__ |
512 | ||
2c1b284e JSR |
513 | extern int direct_gbpages; |
514 | ||
4891645e JF |
515 | /* local pte updates need not use xchg for locking */ |
516 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
517 | { | |
518 | pte_t res = *ptep; | |
519 | ||
520 | /* Pure native function needs no input for mm, addr */ | |
521 | native_pte_clear(NULL, 0, ptep); | |
522 | return res; | |
523 | } | |
524 | ||
525 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, | |
526 | pte_t *ptep , pte_t pte) | |
527 | { | |
528 | native_set_pte(ptep, pte); | |
529 | } | |
530 | ||
195466dc JF |
531 | #ifndef CONFIG_PARAVIRT |
532 | /* | |
533 | * Rules for using pte_update - it must be called after any PTE update which | |
534 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
535 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
536 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
537 | * transitions, which means this hook should only be called for user PTEs. | |
538 | * This hook implies a P->P protection or access change has taken place, which | |
539 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
540 | * until the TLB flush event by using the pte_update_defer form of the | |
541 | * interface, but care must be taken to assure that the flush happens while | |
542 | * still holding the same page table lock so that the shadow and primary pages | |
543 | * do not become out of sync on SMP. | |
544 | */ | |
545 | #define pte_update(mm, addr, ptep) do { } while (0) | |
546 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
547 | #endif | |
548 | ||
195466dc JF |
549 | /* |
550 | * We only update the dirty/accessed state if we set | |
551 | * the dirty bit by hand in the kernel, since the hardware | |
552 | * will do the accessed bit for us, and we don't want to | |
553 | * race with other CPU's that might be updating the dirty | |
554 | * bit at the same time. | |
555 | */ | |
bea41808 JF |
556 | struct vm_area_struct; |
557 | ||
195466dc | 558 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
559 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
560 | unsigned long address, pte_t *ptep, | |
561 | pte_t entry, int dirty); | |
195466dc JF |
562 | |
563 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
564 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
565 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
566 | |
567 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
568 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
569 | unsigned long address, pte_t *ptep); | |
195466dc JF |
570 | |
571 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
572 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
573 | pte_t *ptep) | |
195466dc JF |
574 | { |
575 | pte_t pte = native_ptep_get_and_clear(ptep); | |
576 | pte_update(mm, addr, ptep); | |
577 | return pte; | |
578 | } | |
579 | ||
580 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
581 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
582 | unsigned long addr, pte_t *ptep, | |
583 | int full) | |
195466dc JF |
584 | { |
585 | pte_t pte; | |
586 | if (full) { | |
587 | /* | |
588 | * Full address destruction in progress; paravirt does not | |
589 | * care about updates and native needs no locking | |
590 | */ | |
591 | pte = native_local_ptep_get_and_clear(ptep); | |
592 | } else { | |
593 | pte = ptep_get_and_clear(mm, addr, ptep); | |
594 | } | |
595 | return pte; | |
596 | } | |
597 | ||
598 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
599 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
600 | unsigned long addr, pte_t *ptep) | |
195466dc | 601 | { |
d8d89827 | 602 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
603 | pte_update(mm, addr, ptep); |
604 | } | |
605 | ||
85958b46 JF |
606 | /* |
607 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
608 | * | |
609 | * dst - pointer to pgd range anwhere on a pgd page | |
610 | * src - "" | |
611 | * count - the number of pgds to copy. | |
612 | * | |
613 | * dst and src can be on the same page, but the range must not overlap, | |
614 | * and must not cross a page boundary. | |
615 | */ | |
616 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
617 | { | |
618 | memcpy(dst, src, count * sizeof(pgd_t)); | |
619 | } | |
620 | ||
621 | ||
195466dc JF |
622 | #include <asm-generic/pgtable.h> |
623 | #endif /* __ASSEMBLY__ */ | |
624 | ||
1965aae3 | 625 | #endif /* _ASM_X86_PGTABLE_H */ |