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6c386655 JF |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
3 | ||
4 | #define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) | |
5 | #define FIRST_USER_ADDRESS 0 | |
6 | ||
7 | #define _PAGE_BIT_PRESENT 0 | |
8 | #define _PAGE_BIT_RW 1 | |
9 | #define _PAGE_BIT_USER 2 | |
10 | #define _PAGE_BIT_PWT 3 | |
11 | #define _PAGE_BIT_PCD 4 | |
12 | #define _PAGE_BIT_ACCESSED 5 | |
13 | #define _PAGE_BIT_DIRTY 6 | |
14 | #define _PAGE_BIT_FILE 6 | |
15 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ | |
9bf5a475 | 16 | #define _PAGE_BIT_PAT 7 /* on 4KB pages */ |
6c386655 JF |
17 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
18 | #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ | |
19 | #define _PAGE_BIT_UNUSED2 10 | |
20 | #define _PAGE_BIT_UNUSED3 11 | |
9bf5a475 | 21 | #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ |
6c386655 JF |
22 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
23 | ||
f2919232 JF |
24 | /* |
25 | * Note: we use _AC(1, L) instead of _AC(1, UL) so that we get a | |
26 | * sign-extended value on 32-bit with all 1's in the upper word, | |
27 | * which preserves the upper pte values on 64-bit ptes: | |
28 | */ | |
61f38226 IM |
29 | #define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT) |
30 | #define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW) | |
31 | #define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER) | |
32 | #define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT) | |
33 | #define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD) | |
34 | #define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED) | |
35 | #define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY) | |
36 | #define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */ | |
37 | #define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */ | |
38 | #define _PAGE_UNUSED1 (_AC(1, L)<<_PAGE_BIT_UNUSED1) | |
39 | #define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2) | |
40 | #define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3) | |
9bf5a475 AK |
41 | #define _PAGE_PAT (_AC(1, L)<<_PAGE_BIT_PAT) |
42 | #define _PAGE_PAT_LARGE (_AC(1, L)<<_PAGE_BIT_PAT_LARGE) | |
6c386655 JF |
43 | |
44 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
45 | #define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX) | |
46 | #else | |
47 | #define _PAGE_NX 0 | |
48 | #endif | |
49 | ||
50 | /* If _PAGE_PRESENT is clear, we use these: */ | |
51 | #define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */ | |
52 | #define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE; | |
53 | pte_present gives true */ | |
54 | ||
55 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) | |
56 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) | |
57 | ||
58 | #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) | |
59 | ||
2e5d9c85 | 60 | #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) |
61 | #define _PAGE_CACHE_WB (0) | |
62 | #define _PAGE_CACHE_WC (_PAGE_PWT) | |
63 | #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) | |
64 | #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) | |
65 | ||
6c386655 JF |
66 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
67 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
68 | ||
69 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) | |
70 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
71 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) | |
72 | #define PAGE_COPY PAGE_COPY_NOEXEC | |
73 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
74 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) | |
75 | ||
76 | #ifdef CONFIG_X86_32 | |
77 | #define _PAGE_KERNEL_EXEC \ | |
78 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) | |
79 | #define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX) | |
80 | ||
81 | #ifndef __ASSEMBLY__ | |
c93c82bb | 82 | extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC; |
6c386655 JF |
83 | #endif /* __ASSEMBLY__ */ |
84 | #else | |
85 | #define __PAGE_KERNEL_EXEC \ | |
86 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) | |
87 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) | |
88 | #endif | |
89 | ||
90 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) | |
91 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) | |
d2e626f4 | 92 | #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) |
b310f381 | 93 | #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) |
6c386655 | 94 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) |
d546b67a | 95 | #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) |
6c386655 JF |
96 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
97 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) | |
98 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) | |
99 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) | |
100 | ||
101 | #ifdef CONFIG_X86_32 | |
102 | # define MAKE_GLOBAL(x) __pgprot((x)) | |
103 | #else | |
104 | # define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) | |
105 | #endif | |
106 | ||
107 | #define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) | |
108 | #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) | |
109 | #define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC) | |
110 | #define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX) | |
b310f381 | 111 | #define PAGE_KERNEL_WC MAKE_GLOBAL(__PAGE_KERNEL_WC) |
6c386655 | 112 | #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) |
d546b67a | 113 | #define PAGE_KERNEL_UC_MINUS MAKE_GLOBAL(__PAGE_KERNEL_UC_MINUS) |
d2e626f4 | 114 | #define PAGE_KERNEL_EXEC_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_EXEC_NOCACHE) |
6c386655 JF |
115 | #define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE) |
116 | #define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC) | |
117 | #define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL) | |
118 | #define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE) | |
119 | ||
120 | /* xwr */ | |
121 | #define __P000 PAGE_NONE | |
122 | #define __P001 PAGE_READONLY | |
123 | #define __P010 PAGE_COPY | |
124 | #define __P011 PAGE_COPY | |
125 | #define __P100 PAGE_READONLY_EXEC | |
126 | #define __P101 PAGE_READONLY_EXEC | |
127 | #define __P110 PAGE_COPY_EXEC | |
128 | #define __P111 PAGE_COPY_EXEC | |
129 | ||
130 | #define __S000 PAGE_NONE | |
131 | #define __S001 PAGE_READONLY | |
132 | #define __S010 PAGE_SHARED | |
133 | #define __S011 PAGE_SHARED | |
134 | #define __S100 PAGE_READONLY_EXEC | |
135 | #define __S101 PAGE_READONLY_EXEC | |
136 | #define __S110 PAGE_SHARED_EXEC | |
137 | #define __S111 PAGE_SHARED_EXEC | |
138 | ||
4614139c | 139 | #ifndef __ASSEMBLY__ |
195466dc | 140 | |
8405b122 JF |
141 | /* |
142 | * ZERO_PAGE is a global shared page that is always zero: used | |
143 | * for zero-mapped memory areas etc.. | |
144 | */ | |
145 | extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; | |
146 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) | |
147 | ||
e3ed910d JF |
148 | extern spinlock_t pgd_lock; |
149 | extern struct list_head pgd_list; | |
8405b122 | 150 | |
4614139c JF |
151 | /* |
152 | * The following only work if pte_present() is true. | |
153 | * Undefined behaviour if not.. | |
154 | */ | |
155 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } | |
156 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } | |
157 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } | |
158 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } | |
159 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; } | |
a5a5dc31 | 160 | static inline int pte_global(pte_t pte) { return pte_val(pte) & _PAGE_GLOBAL; } |
4c3c4b45 | 161 | static inline int pte_exec(pte_t pte) { return !(pte_val(pte) & _PAGE_NX); } |
4614139c JF |
162 | |
163 | static inline int pmd_large(pmd_t pte) { | |
164 | return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) == | |
165 | (_PAGE_PSE|_PAGE_PRESENT); | |
166 | } | |
167 | ||
aaa0e890 AK |
168 | static inline pte_t pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_DIRTY); } |
169 | static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED); } | |
170 | static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_RW); } | |
171 | static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_NX); } | |
4614139c JF |
172 | static inline pte_t pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) | _PAGE_DIRTY); } |
173 | static inline pte_t pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) | _PAGE_ACCESSED); } | |
174 | static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | _PAGE_RW); } | |
175 | static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) | _PAGE_PSE); } | |
aaa0e890 | 176 | static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_PSE); } |
a5a5dc31 | 177 | static inline pte_t pte_mkglobal(pte_t pte) { return __pte(pte_val(pte) | _PAGE_GLOBAL); } |
aaa0e890 | 178 | static inline pte_t pte_clrglobal(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_GLOBAL); } |
4614139c | 179 | |
6fdc05d4 JF |
180 | extern pteval_t __supported_pte_mask; |
181 | ||
182 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) | |
183 | { | |
184 | return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) | | |
185 | pgprot_val(pgprot)) & __supported_pte_mask); | |
186 | } | |
187 | ||
188 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
189 | { | |
190 | return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) | | |
191 | pgprot_val(pgprot)) & __supported_pte_mask); | |
192 | } | |
193 | ||
38472311 IM |
194 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
195 | { | |
196 | pteval_t val = pte_val(pte); | |
197 | ||
198 | /* | |
199 | * Chop off the NX bit (if present), and add the NX portion of | |
200 | * the newprot (if present): | |
201 | */ | |
202 | val &= _PAGE_CHG_MASK & ~_PAGE_NX; | |
203 | val |= pgprot_val(newprot) & __supported_pte_mask; | |
204 | ||
205 | return __pte(val); | |
206 | } | |
207 | ||
c6ca18eb AK |
208 | #define pte_pgprot(x) __pgprot(pte_val(x) & (0xfff | _PAGE_NX)) |
209 | ||
1e8e23bc AK |
210 | #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask) |
211 | ||
4891645e JF |
212 | #ifdef CONFIG_PARAVIRT |
213 | #include <asm/paravirt.h> | |
214 | #else /* !CONFIG_PARAVIRT */ | |
215 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
216 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
217 | ||
218 | #define set_pte_present(mm, addr, ptep, pte) \ | |
219 | native_set_pte_present(mm, addr, ptep, pte) | |
220 | #define set_pte_atomic(ptep, pte) \ | |
221 | native_set_pte_atomic(ptep, pte) | |
222 | ||
223 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
224 | ||
225 | #ifndef __PAGETABLE_PUD_FOLDED | |
226 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
227 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
228 | #endif | |
229 | ||
230 | #ifndef set_pud | |
231 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
232 | #endif | |
233 | ||
234 | #ifndef __PAGETABLE_PMD_FOLDED | |
235 | #define pud_clear(pud) native_pud_clear(pud) | |
236 | #endif | |
237 | ||
238 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
239 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
240 | ||
241 | #define pte_update(mm, addr, ptep) do { } while (0) | |
242 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
243 | #endif /* CONFIG_PARAVIRT */ | |
244 | ||
4614139c JF |
245 | #endif /* __ASSEMBLY__ */ |
246 | ||
96a388de TG |
247 | #ifdef CONFIG_X86_32 |
248 | # include "pgtable_32.h" | |
249 | #else | |
250 | # include "pgtable_64.h" | |
251 | #endif | |
6c386655 | 252 | |
195466dc JF |
253 | #ifndef __ASSEMBLY__ |
254 | ||
30551bb3 TG |
255 | enum { |
256 | PG_LEVEL_NONE, | |
257 | PG_LEVEL_4K, | |
258 | PG_LEVEL_2M, | |
86f03989 | 259 | PG_LEVEL_1G, |
30551bb3 TG |
260 | }; |
261 | ||
0a663088 TG |
262 | /* |
263 | * Helper function that returns the kernel pagetable entry controlling | |
264 | * the virtual address 'address'. NULL means no pagetable entry present. | |
265 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it | |
266 | * as a pte too. | |
267 | */ | |
da7bfc50 | 268 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); |
0a663088 | 269 | |
4891645e JF |
270 | /* local pte updates need not use xchg for locking */ |
271 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
272 | { | |
273 | pte_t res = *ptep; | |
274 | ||
275 | /* Pure native function needs no input for mm, addr */ | |
276 | native_pte_clear(NULL, 0, ptep); | |
277 | return res; | |
278 | } | |
279 | ||
280 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, | |
281 | pte_t *ptep , pte_t pte) | |
282 | { | |
283 | native_set_pte(ptep, pte); | |
284 | } | |
285 | ||
195466dc JF |
286 | #ifndef CONFIG_PARAVIRT |
287 | /* | |
288 | * Rules for using pte_update - it must be called after any PTE update which | |
289 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
290 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
291 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
292 | * transitions, which means this hook should only be called for user PTEs. | |
293 | * This hook implies a P->P protection or access change has taken place, which | |
294 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
295 | * until the TLB flush event by using the pte_update_defer form of the | |
296 | * interface, but care must be taken to assure that the flush happens while | |
297 | * still holding the same page table lock so that the shadow and primary pages | |
298 | * do not become out of sync on SMP. | |
299 | */ | |
300 | #define pte_update(mm, addr, ptep) do { } while (0) | |
301 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
302 | #endif | |
303 | ||
195466dc JF |
304 | /* |
305 | * We only update the dirty/accessed state if we set | |
306 | * the dirty bit by hand in the kernel, since the hardware | |
307 | * will do the accessed bit for us, and we don't want to | |
308 | * race with other CPU's that might be updating the dirty | |
309 | * bit at the same time. | |
310 | */ | |
311 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS | |
312 | #define ptep_set_access_flags(vma, address, ptep, entry, dirty) \ | |
313 | ({ \ | |
314 | int __changed = !pte_same(*(ptep), entry); \ | |
315 | if (__changed && dirty) { \ | |
316 | *ptep = entry; \ | |
317 | pte_update_defer((vma)->vm_mm, (address), (ptep)); \ | |
318 | flush_tlb_page(vma, address); \ | |
319 | } \ | |
320 | __changed; \ | |
321 | }) | |
322 | ||
323 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
324 | #define ptep_test_and_clear_young(vma, addr, ptep) ({ \ | |
325 | int __ret = 0; \ | |
326 | if (pte_young(*(ptep))) \ | |
327 | __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \ | |
328 | &(ptep)->pte); \ | |
329 | if (__ret) \ | |
330 | pte_update((vma)->vm_mm, addr, ptep); \ | |
331 | __ret; \ | |
332 | }) | |
333 | ||
334 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
335 | #define ptep_clear_flush_young(vma, address, ptep) \ | |
336 | ({ \ | |
337 | int __young; \ | |
338 | __young = ptep_test_and_clear_young((vma), (address), (ptep)); \ | |
339 | if (__young) \ | |
340 | flush_tlb_page(vma, address); \ | |
341 | __young; \ | |
342 | }) | |
343 | ||
344 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
345 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
346 | { | |
347 | pte_t pte = native_ptep_get_and_clear(ptep); | |
348 | pte_update(mm, addr, ptep); | |
349 | return pte; | |
350 | } | |
351 | ||
352 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
353 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full) | |
354 | { | |
355 | pte_t pte; | |
356 | if (full) { | |
357 | /* | |
358 | * Full address destruction in progress; paravirt does not | |
359 | * care about updates and native needs no locking | |
360 | */ | |
361 | pte = native_local_ptep_get_and_clear(ptep); | |
362 | } else { | |
363 | pte = ptep_get_and_clear(mm, addr, ptep); | |
364 | } | |
365 | return pte; | |
366 | } | |
367 | ||
368 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
369 | static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
370 | { | |
d8d89827 | 371 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
372 | pte_update(mm, addr, ptep); |
373 | } | |
374 | ||
195466dc JF |
375 | #include <asm-generic/pgtable.h> |
376 | #endif /* __ASSEMBLY__ */ | |
377 | ||
6c386655 | 378 | #endif /* _ASM_X86_PGTABLE_H */ |