1 #ifndef _ASM_X86_PGTABLE_H
2 #define _ASM_X86_PGTABLE_H
7 #include <asm/pgtable_types.h>
10 * Macro to mark a page protection value as UC-
12 #define pgprot_noncached(prot) \
13 ((boot_cpu_data.x86 > 3) \
14 ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \
19 #include <asm/x86_init.h>
22 * ZERO_PAGE is a global shared page that is always zero: used
23 * for zero-mapped memory areas etc..
25 extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
26 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
28 extern spinlock_t pgd_lock;
29 extern struct list_head pgd_list;
31 extern struct mm_struct *pgd_page_get_mm(struct page *page);
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)
40 #define set_pte_atomic(ptep, pte) \
41 native_set_pte_atomic(ptep, pte)
43 #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
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)
51 # define set_pud(pudp, pud) native_set_pud(pudp, pud)
54 #ifndef __PAGETABLE_PMD_FOLDED
55 #define pud_clear(pud) native_pud_clear(pud)
58 #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
59 #define pmd_clear(pmd) native_pmd_clear(pmd)
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)
66 #define pgd_val(x) native_pgd_val(x)
67 #define __pgd(x) native_make_pgd(x)
69 #ifndef __PAGETABLE_PUD_FOLDED
70 #define pud_val(x) native_pud_val(x)
71 #define __pud(x) native_make_pud(x)
74 #ifndef __PAGETABLE_PMD_FOLDED
75 #define pmd_val(x) native_pmd_val(x)
76 #define __pmd(x) native_make_pmd(x)
79 #define pte_val(x) native_pte_val(x)
80 #define __pte(x) native_make_pte(x)
82 #define arch_end_context_switch(prev) do {} while(0)
84 #endif /* CONFIG_PARAVIRT */
87 * The following only work if pte_present() is true.
88 * Undefined behaviour if not..
90 static inline int pte_dirty(pte_t pte)
92 return pte_flags(pte) & _PAGE_DIRTY;
95 static inline int pte_young(pte_t pte)
97 return pte_flags(pte) & _PAGE_ACCESSED;
100 static inline int pmd_young(pmd_t pmd)
102 return pmd_flags(pmd) & _PAGE_ACCESSED;
105 static inline int pte_write(pte_t pte)
107 return pte_flags(pte) & _PAGE_RW;
110 static inline int pte_file(pte_t pte)
112 return pte_flags(pte) & _PAGE_FILE;
115 static inline int pte_huge(pte_t pte)
117 return pte_flags(pte) & _PAGE_PSE;
120 static inline int pte_global(pte_t pte)
122 return pte_flags(pte) & _PAGE_GLOBAL;
125 static inline int pte_exec(pte_t pte)
127 return !(pte_flags(pte) & _PAGE_NX);
130 static inline int pte_special(pte_t pte)
132 return pte_flags(pte) & _PAGE_SPECIAL;
135 static inline unsigned long pte_pfn(pte_t pte)
137 return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT;
140 static inline unsigned long pmd_pfn(pmd_t pmd)
142 return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT;
145 static inline unsigned long pud_pfn(pud_t pud)
147 return (pud_val(pud) & PTE_PFN_MASK) >> PAGE_SHIFT;
150 #define pte_page(pte) pfn_to_page(pte_pfn(pte))
152 static inline int pmd_large(pmd_t pte)
154 return pmd_flags(pte) & _PAGE_PSE;
157 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
158 static inline int pmd_trans_splitting(pmd_t pmd)
160 return pmd_val(pmd) & _PAGE_SPLITTING;
163 static inline int pmd_trans_huge(pmd_t pmd)
165 return pmd_val(pmd) & _PAGE_PSE;
168 static inline int has_transparent_hugepage(void)
172 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
174 static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
176 pteval_t v = native_pte_val(pte);
178 return native_make_pte(v | set);
181 static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
183 pteval_t v = native_pte_val(pte);
185 return native_make_pte(v & ~clear);
188 static inline pte_t pte_mkclean(pte_t pte)
190 return pte_clear_flags(pte, _PAGE_DIRTY);
193 static inline pte_t pte_mkold(pte_t pte)
195 return pte_clear_flags(pte, _PAGE_ACCESSED);
198 static inline pte_t pte_wrprotect(pte_t pte)
200 return pte_clear_flags(pte, _PAGE_RW);
203 static inline pte_t pte_mkexec(pte_t pte)
205 return pte_clear_flags(pte, _PAGE_NX);
208 static inline pte_t pte_mkdirty(pte_t pte)
210 return pte_set_flags(pte, _PAGE_DIRTY);
213 static inline pte_t pte_mkyoung(pte_t pte)
215 return pte_set_flags(pte, _PAGE_ACCESSED);
218 static inline pte_t pte_mkwrite(pte_t pte)
220 return pte_set_flags(pte, _PAGE_RW);
223 static inline pte_t pte_mkhuge(pte_t pte)
225 return pte_set_flags(pte, _PAGE_PSE);
228 static inline pte_t pte_clrhuge(pte_t pte)
230 return pte_clear_flags(pte, _PAGE_PSE);
233 static inline pte_t pte_mkglobal(pte_t pte)
235 return pte_set_flags(pte, _PAGE_GLOBAL);
238 static inline pte_t pte_clrglobal(pte_t pte)
240 return pte_clear_flags(pte, _PAGE_GLOBAL);
243 static inline pte_t pte_mkspecial(pte_t pte)
245 return pte_set_flags(pte, _PAGE_SPECIAL);
248 static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
250 pmdval_t v = native_pmd_val(pmd);
252 return __pmd(v | set);
255 static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
257 pmdval_t v = native_pmd_val(pmd);
259 return __pmd(v & ~clear);
262 static inline pmd_t pmd_mkold(pmd_t pmd)
264 return pmd_clear_flags(pmd, _PAGE_ACCESSED);
267 static inline pmd_t pmd_wrprotect(pmd_t pmd)
269 return pmd_clear_flags(pmd, _PAGE_RW);
272 static inline pmd_t pmd_mkdirty(pmd_t pmd)
274 return pmd_set_flags(pmd, _PAGE_DIRTY);
277 static inline pmd_t pmd_mkhuge(pmd_t pmd)
279 return pmd_set_flags(pmd, _PAGE_PSE);
282 static inline pmd_t pmd_mkyoung(pmd_t pmd)
284 return pmd_set_flags(pmd, _PAGE_ACCESSED);
287 static inline pmd_t pmd_mkwrite(pmd_t pmd)
289 return pmd_set_flags(pmd, _PAGE_RW);
292 static inline pmd_t pmd_mknotpresent(pmd_t pmd)
294 return pmd_clear_flags(pmd, _PAGE_PRESENT);
298 * Mask out unsupported bits in a present pgprot. Non-present pgprots
299 * can use those bits for other purposes, so leave them be.
301 static inline pgprotval_t massage_pgprot(pgprot_t pgprot)
303 pgprotval_t protval = pgprot_val(pgprot);
305 if (protval & _PAGE_PRESENT)
306 protval &= __supported_pte_mask;
311 static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
313 return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) |
314 massage_pgprot(pgprot));
317 static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
319 return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) |
320 massage_pgprot(pgprot));
323 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
325 pteval_t val = pte_val(pte);
328 * Chop off the NX bit (if present), and add the NX portion of
329 * the newprot (if present):
331 val &= _PAGE_CHG_MASK;
332 val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK;
337 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
339 pmdval_t val = pmd_val(pmd);
341 val &= _HPAGE_CHG_MASK;
342 val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK;
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)
351 pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;
352 pgprotval_t addbits = pgprot_val(newprot);
353 return __pgprot(preservebits | addbits);
356 #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)
358 #define canon_pgprot(p) __pgprot(massage_pgprot(p))
360 static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
362 unsigned long new_flags)
365 * PAT type is always WB for untracked ranges, so no need to check.
367 if (x86_platform.is_untracked_pat_range(paddr, paddr + size))
371 * Certain new memtypes are not allowed with certain
373 * - request is uncached, return cannot be write-back
374 * - request is write-combine, return cannot be write-back
376 if ((flags == _PAGE_CACHE_UC_MINUS &&
377 new_flags == _PAGE_CACHE_WB) ||
378 (flags == _PAGE_CACHE_WC &&
379 new_flags == _PAGE_CACHE_WB)) {
386 pmd_t *populate_extra_pmd(unsigned long vaddr);
387 pte_t *populate_extra_pte(unsigned long vaddr);
388 #endif /* __ASSEMBLY__ */
391 # include <asm/pgtable_32.h>
393 # include <asm/pgtable_64.h>
397 #include <linux/mm_types.h>
398 #include <linux/log2.h>
400 static inline int pte_none(pte_t pte)
405 #define __HAVE_ARCH_PTE_SAME
406 static inline int pte_same(pte_t a, pte_t b)
408 return a.pte == b.pte;
411 static inline int pte_present(pte_t a)
413 return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE |
417 #define pte_accessible pte_accessible
418 static inline bool pte_accessible(struct mm_struct *mm, pte_t a)
420 if (pte_flags(a) & _PAGE_PRESENT)
423 if ((pte_flags(a) & (_PAGE_PROTNONE | _PAGE_NUMA)) &&
424 mm_tlb_flush_pending(mm))
430 static inline int pte_hidden(pte_t pte)
432 return pte_flags(pte) & _PAGE_HIDDEN;
435 static inline int pmd_present(pmd_t pmd)
438 * Checking for _PAGE_PSE is needed too because
439 * split_huge_page will temporarily clear the present bit (but
440 * the _PAGE_PSE flag will remain set at all times while the
441 * _PAGE_PRESENT bit is clear).
443 return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE |
447 static inline int pmd_none(pmd_t pmd)
449 /* Only check low word on 32-bit platforms, since it might be
450 out of sync with upper half. */
451 return (unsigned long)native_pmd_val(pmd) == 0;
454 static inline unsigned long pmd_page_vaddr(pmd_t pmd)
456 return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);
460 * Currently stuck as a macro due to indirect forward reference to
461 * linux/mmzone.h's __section_mem_map_addr() definition:
463 #define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT)
466 * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
468 * this macro returns the index of the entry in the pmd page which would
469 * control the given virtual address
471 static inline unsigned long pmd_index(unsigned long address)
473 return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
477 * Conversion functions: convert a page and protection to a page entry,
478 * and a page entry and page directory to the page they refer to.
480 * (Currently stuck as a macro because of indirect forward reference
481 * to linux/mm.h:page_to_nid())
483 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
486 * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
488 * this function returns the index of the entry in the pte page which would
489 * control the given virtual address
491 static inline unsigned long pte_index(unsigned long address)
493 return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
496 static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
498 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
501 static inline int pmd_bad(pmd_t pmd)
503 #ifdef CONFIG_NUMA_BALANCING
505 if ((pmd_flags(pmd) & (_PAGE_NUMA|_PAGE_PRESENT)) == _PAGE_NUMA)
508 return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
511 static inline unsigned long pages_to_mb(unsigned long npg)
513 return npg >> (20 - PAGE_SHIFT);
516 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
517 remap_pfn_range(vma, vaddr, pfn, size, prot)
519 #if PAGETABLE_LEVELS > 2
520 static inline int pud_none(pud_t pud)
522 return native_pud_val(pud) == 0;
525 static inline int pud_present(pud_t pud)
527 return pud_flags(pud) & _PAGE_PRESENT;
530 static inline unsigned long pud_page_vaddr(pud_t pud)
532 return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK);
536 * Currently stuck as a macro due to indirect forward reference to
537 * linux/mmzone.h's __section_mem_map_addr() definition:
539 #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
541 /* Find an entry in the second-level page table.. */
542 static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
544 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
547 static inline int pud_large(pud_t pud)
549 return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
550 (_PAGE_PSE | _PAGE_PRESENT);
553 static inline int pud_bad(pud_t pud)
555 return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
558 static inline int pud_large(pud_t pud)
562 #endif /* PAGETABLE_LEVELS > 2 */
564 #if PAGETABLE_LEVELS > 3
565 static inline int pgd_present(pgd_t pgd)
567 return pgd_flags(pgd) & _PAGE_PRESENT;
570 static inline unsigned long pgd_page_vaddr(pgd_t pgd)
572 return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
576 * Currently stuck as a macro due to indirect forward reference to
577 * linux/mmzone.h's __section_mem_map_addr() definition:
579 #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
581 /* to find an entry in a page-table-directory. */
582 static inline unsigned long pud_index(unsigned long address)
584 return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
587 static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
589 return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
592 static inline int pgd_bad(pgd_t pgd)
594 return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;
597 static inline int pgd_none(pgd_t pgd)
599 return !native_pgd_val(pgd);
601 #endif /* PAGETABLE_LEVELS > 3 */
603 #endif /* __ASSEMBLY__ */
606 * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
608 * this macro returns the index of the entry in the pgd page which would
609 * control the given virtual address
611 #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
614 * pgd_offset() returns a (pgd_t *)
615 * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
617 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
619 * a shortcut which implies the use of the kernel's pgd, instead
622 #define pgd_offset_k(address) pgd_offset(&init_mm, (address))
625 #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
626 #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
630 extern int direct_gbpages;
631 void init_mem_mapping(void);
632 void early_alloc_pgt_buf(void);
634 /* local pte updates need not use xchg for locking */
635 static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
639 /* Pure native function needs no input for mm, addr */
640 native_pte_clear(NULL, 0, ptep);
644 static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
648 native_pmd_clear(pmdp);
652 static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
653 pte_t *ptep , pte_t pte)
655 native_set_pte(ptep, pte);
658 static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,
659 pmd_t *pmdp , pmd_t pmd)
661 native_set_pmd(pmdp, pmd);
664 #ifndef CONFIG_PARAVIRT
666 * Rules for using pte_update - it must be called after any PTE update which
667 * has not been done using the set_pte / clear_pte interfaces. It is used by
668 * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
669 * updates should either be sets, clears, or set_pte_atomic for P->P
670 * transitions, which means this hook should only be called for user PTEs.
671 * This hook implies a P->P protection or access change has taken place, which
672 * requires a subsequent TLB flush. The notification can optionally be delayed
673 * until the TLB flush event by using the pte_update_defer form of the
674 * interface, but care must be taken to assure that the flush happens while
675 * still holding the same page table lock so that the shadow and primary pages
676 * do not become out of sync on SMP.
678 #define pte_update(mm, addr, ptep) do { } while (0)
679 #define pte_update_defer(mm, addr, ptep) do { } while (0)
683 * We only update the dirty/accessed state if we set
684 * the dirty bit by hand in the kernel, since the hardware
685 * will do the accessed bit for us, and we don't want to
686 * race with other CPU's that might be updating the dirty
687 * bit at the same time.
689 struct vm_area_struct;
691 #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
692 extern int ptep_set_access_flags(struct vm_area_struct *vma,
693 unsigned long address, pte_t *ptep,
694 pte_t entry, int dirty);
696 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
697 extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
698 unsigned long addr, pte_t *ptep);
700 #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
701 extern int ptep_clear_flush_young(struct vm_area_struct *vma,
702 unsigned long address, pte_t *ptep);
704 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
705 static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
708 pte_t pte = native_ptep_get_and_clear(ptep);
709 pte_update(mm, addr, ptep);
713 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
714 static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
715 unsigned long addr, pte_t *ptep,
721 * Full address destruction in progress; paravirt does not
722 * care about updates and native needs no locking
724 pte = native_local_ptep_get_and_clear(ptep);
726 pte = ptep_get_and_clear(mm, addr, ptep);
731 #define __HAVE_ARCH_PTEP_SET_WRPROTECT
732 static inline void ptep_set_wrprotect(struct mm_struct *mm,
733 unsigned long addr, pte_t *ptep)
735 clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
736 pte_update(mm, addr, ptep);
739 #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)
741 #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
743 #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
744 extern int pmdp_set_access_flags(struct vm_area_struct *vma,
745 unsigned long address, pmd_t *pmdp,
746 pmd_t entry, int dirty);
748 #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
749 extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
750 unsigned long addr, pmd_t *pmdp);
752 #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
753 extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
754 unsigned long address, pmd_t *pmdp);
757 #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
758 extern void pmdp_splitting_flush(struct vm_area_struct *vma,
759 unsigned long addr, pmd_t *pmdp);
761 #define __HAVE_ARCH_PMD_WRITE
762 static inline int pmd_write(pmd_t pmd)
764 return pmd_flags(pmd) & _PAGE_RW;
767 #define __HAVE_ARCH_PMDP_GET_AND_CLEAR
768 static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
771 pmd_t pmd = native_pmdp_get_and_clear(pmdp);
772 pmd_update(mm, addr, pmdp);
776 #define __HAVE_ARCH_PMDP_SET_WRPROTECT
777 static inline void pmdp_set_wrprotect(struct mm_struct *mm,
778 unsigned long addr, pmd_t *pmdp)
780 clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
781 pmd_update(mm, addr, pmdp);
785 * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
787 * dst - pointer to pgd range anwhere on a pgd page
789 * count - the number of pgds to copy.
791 * dst and src can be on the same page, but the range must not overlap,
792 * and must not cross a page boundary.
794 static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
796 memcpy(dst, src, count * sizeof(pgd_t));
799 #define PTE_SHIFT ilog2(PTRS_PER_PTE)
800 static inline int page_level_shift(enum pg_level level)
802 return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT;
804 static inline unsigned long page_level_size(enum pg_level level)
806 return 1UL << page_level_shift(level);
808 static inline unsigned long page_level_mask(enum pg_level level)
810 return ~(page_level_size(level) - 1);
814 * The x86 doesn't have any external MMU info: the kernel page
815 * tables contain all the necessary information.
817 static inline void update_mmu_cache(struct vm_area_struct *vma,
818 unsigned long addr, pte_t *ptep)
821 static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
822 unsigned long addr, pmd_t *pmd)
826 #include <asm-generic/pgtable.h>
827 #endif /* __ASSEMBLY__ */
829 #endif /* _ASM_X86_PGTABLE_H */