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