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)) \
18 #include <asm/x86_init.h>
20 void ptdump_walk_pgd_level(struct seq_file
*m
, pgd_t
*pgd
);
23 * ZERO_PAGE is a global shared page that is always zero: used
24 * for zero-mapped memory areas etc..
26 extern unsigned long empty_zero_page
[PAGE_SIZE
/ sizeof(unsigned long)]
28 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
30 extern spinlock_t pgd_lock
;
31 extern struct list_head pgd_list
;
33 extern struct mm_struct
*pgd_page_get_mm(struct page
*page
);
35 #ifdef CONFIG_PARAVIRT
36 #include <asm/paravirt.h>
37 #else /* !CONFIG_PARAVIRT */
38 #define set_pte(ptep, pte) native_set_pte(ptep, pte)
39 #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
40 #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd)
42 #define set_pte_atomic(ptep, pte) \
43 native_set_pte_atomic(ptep, pte)
45 #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
47 #ifndef __PAGETABLE_PUD_FOLDED
48 #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
49 #define pgd_clear(pgd) native_pgd_clear(pgd)
53 # define set_pud(pudp, pud) native_set_pud(pudp, pud)
56 #ifndef __PAGETABLE_PMD_FOLDED
57 #define pud_clear(pud) native_pud_clear(pud)
60 #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
61 #define pmd_clear(pmd) native_pmd_clear(pmd)
63 #define pte_update(mm, addr, ptep) do { } while (0)
64 #define pte_update_defer(mm, addr, ptep) do { } while (0)
65 #define pmd_update(mm, addr, ptep) do { } while (0)
66 #define pmd_update_defer(mm, addr, ptep) do { } while (0)
68 #define pgd_val(x) native_pgd_val(x)
69 #define __pgd(x) native_make_pgd(x)
71 #ifndef __PAGETABLE_PUD_FOLDED
72 #define pud_val(x) native_pud_val(x)
73 #define __pud(x) native_make_pud(x)
76 #ifndef __PAGETABLE_PMD_FOLDED
77 #define pmd_val(x) native_pmd_val(x)
78 #define __pmd(x) native_make_pmd(x)
81 #define pte_val(x) native_pte_val(x)
82 #define __pte(x) native_make_pte(x)
84 #define arch_end_context_switch(prev) do {} while(0)
86 #endif /* CONFIG_PARAVIRT */
89 * The following only work if pte_present() is true.
90 * Undefined behaviour if not..
92 static inline int pte_dirty(pte_t pte
)
94 return pte_flags(pte
) & _PAGE_DIRTY
;
97 static inline int pte_young(pte_t pte
)
99 return pte_flags(pte
) & _PAGE_ACCESSED
;
102 static inline int pmd_young(pmd_t pmd
)
104 return pmd_flags(pmd
) & _PAGE_ACCESSED
;
107 static inline int pte_write(pte_t pte
)
109 return pte_flags(pte
) & _PAGE_RW
;
112 static inline int pte_file(pte_t pte
)
114 return pte_flags(pte
) & _PAGE_FILE
;
117 static inline int pte_huge(pte_t pte
)
119 return pte_flags(pte
) & _PAGE_PSE
;
122 static inline int pte_global(pte_t pte
)
124 return pte_flags(pte
) & _PAGE_GLOBAL
;
127 static inline int pte_exec(pte_t pte
)
129 return !(pte_flags(pte
) & _PAGE_NX
);
132 static inline int pte_special(pte_t pte
)
134 return pte_flags(pte
) & _PAGE_SPECIAL
;
137 static inline unsigned long pte_pfn(pte_t pte
)
139 return (pte_val(pte
) & PTE_PFN_MASK
) >> PAGE_SHIFT
;
142 static inline unsigned long pmd_pfn(pmd_t pmd
)
144 return (pmd_val(pmd
) & PTE_PFN_MASK
) >> PAGE_SHIFT
;
147 static inline unsigned long pud_pfn(pud_t pud
)
149 return (pud_val(pud
) & PTE_PFN_MASK
) >> PAGE_SHIFT
;
152 #define pte_page(pte) pfn_to_page(pte_pfn(pte))
154 static inline int pmd_large(pmd_t pte
)
156 return pmd_flags(pte
) & _PAGE_PSE
;
159 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
160 static inline int pmd_trans_splitting(pmd_t pmd
)
162 return pmd_val(pmd
) & _PAGE_SPLITTING
;
165 static inline int pmd_trans_huge(pmd_t pmd
)
167 return pmd_val(pmd
) & _PAGE_PSE
;
170 static inline int has_transparent_hugepage(void)
174 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
176 static inline pte_t
pte_set_flags(pte_t pte
, pteval_t set
)
178 pteval_t v
= native_pte_val(pte
);
180 return native_make_pte(v
| set
);
183 static inline pte_t
pte_clear_flags(pte_t pte
, pteval_t clear
)
185 pteval_t v
= native_pte_val(pte
);
187 return native_make_pte(v
& ~clear
);
190 static inline pte_t
pte_mkclean(pte_t pte
)
192 return pte_clear_flags(pte
, _PAGE_DIRTY
);
195 static inline pte_t
pte_mkold(pte_t pte
)
197 return pte_clear_flags(pte
, _PAGE_ACCESSED
);
200 static inline pte_t
pte_wrprotect(pte_t pte
)
202 return pte_clear_flags(pte
, _PAGE_RW
);
205 static inline pte_t
pte_mkexec(pte_t pte
)
207 return pte_clear_flags(pte
, _PAGE_NX
);
210 static inline pte_t
pte_mkdirty(pte_t pte
)
212 return pte_set_flags(pte
, _PAGE_DIRTY
| _PAGE_SOFT_DIRTY
);
215 static inline pte_t
pte_mkyoung(pte_t pte
)
217 return pte_set_flags(pte
, _PAGE_ACCESSED
);
220 static inline pte_t
pte_mkwrite(pte_t pte
)
222 return pte_set_flags(pte
, _PAGE_RW
);
225 static inline pte_t
pte_mkhuge(pte_t pte
)
227 return pte_set_flags(pte
, _PAGE_PSE
);
230 static inline pte_t
pte_clrhuge(pte_t pte
)
232 return pte_clear_flags(pte
, _PAGE_PSE
);
235 static inline pte_t
pte_mkglobal(pte_t pte
)
237 return pte_set_flags(pte
, _PAGE_GLOBAL
);
240 static inline pte_t
pte_clrglobal(pte_t pte
)
242 return pte_clear_flags(pte
, _PAGE_GLOBAL
);
245 static inline pte_t
pte_mkspecial(pte_t pte
)
247 return pte_set_flags(pte
, _PAGE_SPECIAL
);
250 static inline pmd_t
pmd_set_flags(pmd_t pmd
, pmdval_t set
)
252 pmdval_t v
= native_pmd_val(pmd
);
254 return __pmd(v
| set
);
257 static inline pmd_t
pmd_clear_flags(pmd_t pmd
, pmdval_t clear
)
259 pmdval_t v
= native_pmd_val(pmd
);
261 return __pmd(v
& ~clear
);
264 static inline pmd_t
pmd_mkold(pmd_t pmd
)
266 return pmd_clear_flags(pmd
, _PAGE_ACCESSED
);
269 static inline pmd_t
pmd_wrprotect(pmd_t pmd
)
271 return pmd_clear_flags(pmd
, _PAGE_RW
);
274 static inline pmd_t
pmd_mkdirty(pmd_t pmd
)
276 return pmd_set_flags(pmd
, _PAGE_DIRTY
| _PAGE_SOFT_DIRTY
);
279 static inline pmd_t
pmd_mkhuge(pmd_t pmd
)
281 return pmd_set_flags(pmd
, _PAGE_PSE
);
284 static inline pmd_t
pmd_mkyoung(pmd_t pmd
)
286 return pmd_set_flags(pmd
, _PAGE_ACCESSED
);
289 static inline pmd_t
pmd_mkwrite(pmd_t pmd
)
291 return pmd_set_flags(pmd
, _PAGE_RW
);
294 static inline pmd_t
pmd_mknotpresent(pmd_t pmd
)
296 return pmd_clear_flags(pmd
, _PAGE_PRESENT
);
299 static inline int pte_soft_dirty(pte_t pte
)
301 return pte_flags(pte
) & _PAGE_SOFT_DIRTY
;
304 static inline int pmd_soft_dirty(pmd_t pmd
)
306 return pmd_flags(pmd
) & _PAGE_SOFT_DIRTY
;
309 static inline pte_t
pte_mksoft_dirty(pte_t pte
)
311 return pte_set_flags(pte
, _PAGE_SOFT_DIRTY
);
314 static inline pmd_t
pmd_mksoft_dirty(pmd_t pmd
)
316 return pmd_set_flags(pmd
, _PAGE_SOFT_DIRTY
);
319 static inline pte_t
pte_file_clear_soft_dirty(pte_t pte
)
321 return pte_clear_flags(pte
, _PAGE_SOFT_DIRTY
);
324 static inline pte_t
pte_file_mksoft_dirty(pte_t pte
)
326 return pte_set_flags(pte
, _PAGE_SOFT_DIRTY
);
329 static inline int pte_file_soft_dirty(pte_t pte
)
331 return pte_flags(pte
) & _PAGE_SOFT_DIRTY
;
335 * Mask out unsupported bits in a present pgprot. Non-present pgprots
336 * can use those bits for other purposes, so leave them be.
338 static inline pgprotval_t
massage_pgprot(pgprot_t pgprot
)
340 pgprotval_t protval
= pgprot_val(pgprot
);
342 if (protval
& _PAGE_PRESENT
)
343 protval
&= __supported_pte_mask
;
348 static inline pte_t
pfn_pte(unsigned long page_nr
, pgprot_t pgprot
)
350 return __pte(((phys_addr_t
)page_nr
<< PAGE_SHIFT
) |
351 massage_pgprot(pgprot
));
354 static inline pmd_t
pfn_pmd(unsigned long page_nr
, pgprot_t pgprot
)
356 return __pmd(((phys_addr_t
)page_nr
<< PAGE_SHIFT
) |
357 massage_pgprot(pgprot
));
360 static inline pte_t
pte_modify(pte_t pte
, pgprot_t newprot
)
362 pteval_t val
= pte_val(pte
);
365 * Chop off the NX bit (if present), and add the NX portion of
366 * the newprot (if present):
368 val
&= _PAGE_CHG_MASK
;
369 val
|= massage_pgprot(newprot
) & ~_PAGE_CHG_MASK
;
374 static inline pmd_t
pmd_modify(pmd_t pmd
, pgprot_t newprot
)
376 pmdval_t val
= pmd_val(pmd
);
378 val
&= _HPAGE_CHG_MASK
;
379 val
|= massage_pgprot(newprot
) & ~_HPAGE_CHG_MASK
;
384 /* mprotect needs to preserve PAT bits when updating vm_page_prot */
385 #define pgprot_modify pgprot_modify
386 static inline pgprot_t
pgprot_modify(pgprot_t oldprot
, pgprot_t newprot
)
388 pgprotval_t preservebits
= pgprot_val(oldprot
) & _PAGE_CHG_MASK
;
389 pgprotval_t addbits
= pgprot_val(newprot
);
390 return __pgprot(preservebits
| addbits
);
393 #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)
395 #define canon_pgprot(p) __pgprot(massage_pgprot(p))
397 static inline int is_new_memtype_allowed(u64 paddr
, unsigned long size
,
399 unsigned long new_flags
)
402 * PAT type is always WB for untracked ranges, so no need to check.
404 if (x86_platform
.is_untracked_pat_range(paddr
, paddr
+ size
))
408 * Certain new memtypes are not allowed with certain
410 * - request is uncached, return cannot be write-back
411 * - request is write-combine, return cannot be write-back
413 if ((flags
== _PAGE_CACHE_UC_MINUS
&&
414 new_flags
== _PAGE_CACHE_WB
) ||
415 (flags
== _PAGE_CACHE_WC
&&
416 new_flags
== _PAGE_CACHE_WB
)) {
423 pmd_t
*populate_extra_pmd(unsigned long vaddr
);
424 pte_t
*populate_extra_pte(unsigned long vaddr
);
425 #endif /* __ASSEMBLY__ */
428 # include <asm/pgtable_32.h>
430 # include <asm/pgtable_64.h>
434 #include <linux/mm_types.h>
435 #include <linux/mmdebug.h>
436 #include <linux/log2.h>
438 static inline int pte_none(pte_t pte
)
443 #define __HAVE_ARCH_PTE_SAME
444 static inline int pte_same(pte_t a
, pte_t b
)
446 return a
.pte
== b
.pte
;
449 static inline int pte_present(pte_t a
)
451 return pte_flags(a
) & (_PAGE_PRESENT
| _PAGE_PROTNONE
|
455 #define pte_accessible pte_accessible
456 static inline bool pte_accessible(struct mm_struct
*mm
, pte_t a
)
458 if (pte_flags(a
) & _PAGE_PRESENT
)
461 if ((pte_flags(a
) & (_PAGE_PROTNONE
| _PAGE_NUMA
)) &&
462 mm_tlb_flush_pending(mm
))
468 static inline int pte_hidden(pte_t pte
)
470 return pte_flags(pte
) & _PAGE_HIDDEN
;
473 static inline int pmd_present(pmd_t pmd
)
476 * Checking for _PAGE_PSE is needed too because
477 * split_huge_page will temporarily clear the present bit (but
478 * the _PAGE_PSE flag will remain set at all times while the
479 * _PAGE_PRESENT bit is clear).
481 return pmd_flags(pmd
) & (_PAGE_PRESENT
| _PAGE_PROTNONE
| _PAGE_PSE
|
485 static inline int pmd_none(pmd_t pmd
)
487 /* Only check low word on 32-bit platforms, since it might be
488 out of sync with upper half. */
489 return (unsigned long)native_pmd_val(pmd
) == 0;
492 static inline unsigned long pmd_page_vaddr(pmd_t pmd
)
494 return (unsigned long)__va(pmd_val(pmd
) & PTE_PFN_MASK
);
498 * Currently stuck as a macro due to indirect forward reference to
499 * linux/mmzone.h's __section_mem_map_addr() definition:
501 #define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT)
504 * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
506 * this macro returns the index of the entry in the pmd page which would
507 * control the given virtual address
509 static inline unsigned long pmd_index(unsigned long address
)
511 return (address
>> PMD_SHIFT
) & (PTRS_PER_PMD
- 1);
515 * Conversion functions: convert a page and protection to a page entry,
516 * and a page entry and page directory to the page they refer to.
518 * (Currently stuck as a macro because of indirect forward reference
519 * to linux/mm.h:page_to_nid())
521 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
524 * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
526 * this function returns the index of the entry in the pte page which would
527 * control the given virtual address
529 static inline unsigned long pte_index(unsigned long address
)
531 return (address
>> PAGE_SHIFT
) & (PTRS_PER_PTE
- 1);
534 static inline pte_t
*pte_offset_kernel(pmd_t
*pmd
, unsigned long address
)
536 return (pte_t
*)pmd_page_vaddr(*pmd
) + pte_index(address
);
539 static inline int pmd_bad(pmd_t pmd
)
541 #ifdef CONFIG_NUMA_BALANCING
543 if ((pmd_flags(pmd
) & (_PAGE_NUMA
|_PAGE_PRESENT
)) == _PAGE_NUMA
)
546 return (pmd_flags(pmd
) & ~_PAGE_USER
) != _KERNPG_TABLE
;
549 static inline unsigned long pages_to_mb(unsigned long npg
)
551 return npg
>> (20 - PAGE_SHIFT
);
554 #if PAGETABLE_LEVELS > 2
555 static inline int pud_none(pud_t pud
)
557 return native_pud_val(pud
) == 0;
560 static inline int pud_present(pud_t pud
)
562 return pud_flags(pud
) & _PAGE_PRESENT
;
565 static inline unsigned long pud_page_vaddr(pud_t pud
)
567 return (unsigned long)__va((unsigned long)pud_val(pud
) & PTE_PFN_MASK
);
571 * Currently stuck as a macro due to indirect forward reference to
572 * linux/mmzone.h's __section_mem_map_addr() definition:
574 #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
576 /* Find an entry in the second-level page table.. */
577 static inline pmd_t
*pmd_offset(pud_t
*pud
, unsigned long address
)
579 return (pmd_t
*)pud_page_vaddr(*pud
) + pmd_index(address
);
582 static inline int pud_large(pud_t pud
)
584 return (pud_val(pud
) & (_PAGE_PSE
| _PAGE_PRESENT
)) ==
585 (_PAGE_PSE
| _PAGE_PRESENT
);
588 static inline int pud_bad(pud_t pud
)
590 return (pud_flags(pud
) & ~(_KERNPG_TABLE
| _PAGE_USER
)) != 0;
593 static inline int pud_large(pud_t pud
)
597 #endif /* PAGETABLE_LEVELS > 2 */
599 #if PAGETABLE_LEVELS > 3
600 static inline int pgd_present(pgd_t pgd
)
602 return pgd_flags(pgd
) & _PAGE_PRESENT
;
605 static inline unsigned long pgd_page_vaddr(pgd_t pgd
)
607 return (unsigned long)__va((unsigned long)pgd_val(pgd
) & PTE_PFN_MASK
);
611 * Currently stuck as a macro due to indirect forward reference to
612 * linux/mmzone.h's __section_mem_map_addr() definition:
614 #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
616 /* to find an entry in a page-table-directory. */
617 static inline unsigned long pud_index(unsigned long address
)
619 return (address
>> PUD_SHIFT
) & (PTRS_PER_PUD
- 1);
622 static inline pud_t
*pud_offset(pgd_t
*pgd
, unsigned long address
)
624 return (pud_t
*)pgd_page_vaddr(*pgd
) + pud_index(address
);
627 static inline int pgd_bad(pgd_t pgd
)
629 return (pgd_flags(pgd
) & ~_PAGE_USER
) != _KERNPG_TABLE
;
632 static inline int pgd_none(pgd_t pgd
)
634 return !native_pgd_val(pgd
);
636 #endif /* PAGETABLE_LEVELS > 3 */
638 #endif /* __ASSEMBLY__ */
641 * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
643 * this macro returns the index of the entry in the pgd page which would
644 * control the given virtual address
646 #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
649 * pgd_offset() returns a (pgd_t *)
650 * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
652 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
654 * a shortcut which implies the use of the kernel's pgd, instead
657 #define pgd_offset_k(address) pgd_offset(&init_mm, (address))
660 #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
661 #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
665 extern int direct_gbpages
;
666 void init_mem_mapping(void);
667 void early_alloc_pgt_buf(void);
669 /* local pte updates need not use xchg for locking */
670 static inline pte_t
native_local_ptep_get_and_clear(pte_t
*ptep
)
674 /* Pure native function needs no input for mm, addr */
675 native_pte_clear(NULL
, 0, ptep
);
679 static inline pmd_t
native_local_pmdp_get_and_clear(pmd_t
*pmdp
)
683 native_pmd_clear(pmdp
);
687 static inline void native_set_pte_at(struct mm_struct
*mm
, unsigned long addr
,
688 pte_t
*ptep
, pte_t pte
)
690 native_set_pte(ptep
, pte
);
693 static inline void native_set_pmd_at(struct mm_struct
*mm
, unsigned long addr
,
694 pmd_t
*pmdp
, pmd_t pmd
)
696 native_set_pmd(pmdp
, pmd
);
699 #ifndef CONFIG_PARAVIRT
701 * Rules for using pte_update - it must be called after any PTE update which
702 * has not been done using the set_pte / clear_pte interfaces. It is used by
703 * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
704 * updates should either be sets, clears, or set_pte_atomic for P->P
705 * transitions, which means this hook should only be called for user PTEs.
706 * This hook implies a P->P protection or access change has taken place, which
707 * requires a subsequent TLB flush. The notification can optionally be delayed
708 * until the TLB flush event by using the pte_update_defer form of the
709 * interface, but care must be taken to assure that the flush happens while
710 * still holding the same page table lock so that the shadow and primary pages
711 * do not become out of sync on SMP.
713 #define pte_update(mm, addr, ptep) do { } while (0)
714 #define pte_update_defer(mm, addr, ptep) do { } while (0)
718 * We only update the dirty/accessed state if we set
719 * the dirty bit by hand in the kernel, since the hardware
720 * will do the accessed bit for us, and we don't want to
721 * race with other CPU's that might be updating the dirty
722 * bit at the same time.
724 struct vm_area_struct
;
726 #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
727 extern int ptep_set_access_flags(struct vm_area_struct
*vma
,
728 unsigned long address
, pte_t
*ptep
,
729 pte_t entry
, int dirty
);
731 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
732 extern int ptep_test_and_clear_young(struct vm_area_struct
*vma
,
733 unsigned long addr
, pte_t
*ptep
);
735 #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
736 extern int ptep_clear_flush_young(struct vm_area_struct
*vma
,
737 unsigned long address
, pte_t
*ptep
);
739 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
740 static inline pte_t
ptep_get_and_clear(struct mm_struct
*mm
, unsigned long addr
,
743 pte_t pte
= native_ptep_get_and_clear(ptep
);
744 pte_update(mm
, addr
, ptep
);
748 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
749 static inline pte_t
ptep_get_and_clear_full(struct mm_struct
*mm
,
750 unsigned long addr
, pte_t
*ptep
,
756 * Full address destruction in progress; paravirt does not
757 * care about updates and native needs no locking
759 pte
= native_local_ptep_get_and_clear(ptep
);
761 pte
= ptep_get_and_clear(mm
, addr
, ptep
);
766 #define __HAVE_ARCH_PTEP_SET_WRPROTECT
767 static inline void ptep_set_wrprotect(struct mm_struct
*mm
,
768 unsigned long addr
, pte_t
*ptep
)
770 clear_bit(_PAGE_BIT_RW
, (unsigned long *)&ptep
->pte
);
771 pte_update(mm
, addr
, ptep
);
774 #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)
776 #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
778 #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
779 extern int pmdp_set_access_flags(struct vm_area_struct
*vma
,
780 unsigned long address
, pmd_t
*pmdp
,
781 pmd_t entry
, int dirty
);
783 #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
784 extern int pmdp_test_and_clear_young(struct vm_area_struct
*vma
,
785 unsigned long addr
, pmd_t
*pmdp
);
787 #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
788 extern int pmdp_clear_flush_young(struct vm_area_struct
*vma
,
789 unsigned long address
, pmd_t
*pmdp
);
792 #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
793 extern void pmdp_splitting_flush(struct vm_area_struct
*vma
,
794 unsigned long addr
, pmd_t
*pmdp
);
796 #define __HAVE_ARCH_PMD_WRITE
797 static inline int pmd_write(pmd_t pmd
)
799 return pmd_flags(pmd
) & _PAGE_RW
;
802 #define __HAVE_ARCH_PMDP_GET_AND_CLEAR
803 static inline pmd_t
pmdp_get_and_clear(struct mm_struct
*mm
, unsigned long addr
,
806 pmd_t pmd
= native_pmdp_get_and_clear(pmdp
);
807 pmd_update(mm
, addr
, pmdp
);
811 #define __HAVE_ARCH_PMDP_SET_WRPROTECT
812 static inline void pmdp_set_wrprotect(struct mm_struct
*mm
,
813 unsigned long addr
, pmd_t
*pmdp
)
815 clear_bit(_PAGE_BIT_RW
, (unsigned long *)pmdp
);
816 pmd_update(mm
, addr
, pmdp
);
820 * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
822 * dst - pointer to pgd range anwhere on a pgd page
824 * count - the number of pgds to copy.
826 * dst and src can be on the same page, but the range must not overlap,
827 * and must not cross a page boundary.
829 static inline void clone_pgd_range(pgd_t
*dst
, pgd_t
*src
, int count
)
831 memcpy(dst
, src
, count
* sizeof(pgd_t
));
834 #define PTE_SHIFT ilog2(PTRS_PER_PTE)
835 static inline int page_level_shift(enum pg_level level
)
837 return (PAGE_SHIFT
- PTE_SHIFT
) + level
* PTE_SHIFT
;
839 static inline unsigned long page_level_size(enum pg_level level
)
841 return 1UL << page_level_shift(level
);
843 static inline unsigned long page_level_mask(enum pg_level level
)
845 return ~(page_level_size(level
) - 1);
849 * The x86 doesn't have any external MMU info: the kernel page
850 * tables contain all the necessary information.
852 static inline void update_mmu_cache(struct vm_area_struct
*vma
,
853 unsigned long addr
, pte_t
*ptep
)
856 static inline void update_mmu_cache_pmd(struct vm_area_struct
*vma
,
857 unsigned long addr
, pmd_t
*pmd
)
861 static inline pte_t
pte_swp_mksoft_dirty(pte_t pte
)
863 VM_BUG_ON(pte_present(pte
));
864 return pte_set_flags(pte
, _PAGE_SWP_SOFT_DIRTY
);
867 static inline int pte_swp_soft_dirty(pte_t pte
)
869 VM_BUG_ON(pte_present(pte
));
870 return pte_flags(pte
) & _PAGE_SWP_SOFT_DIRTY
;
873 static inline pte_t
pte_swp_clear_soft_dirty(pte_t pte
)
875 VM_BUG_ON(pte_present(pte
));
876 return pte_clear_flags(pte
, _PAGE_SWP_SOFT_DIRTY
);
879 #include <asm-generic/pgtable.h>
880 #endif /* __ASSEMBLY__ */
882 #endif /* _ASM_X86_PGTABLE_H */
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