4 * Generic pgtable methods declared in asm-generic/pgtable.h
6 * Copyright (C) 2010 Linus Torvalds
10 #include <asm-generic/pgtable.h>
12 #ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
14 * Only sets the access flags (dirty, accessed, and
15 * writable). Furthermore, we know it always gets set to a "more
16 * permissive" setting, which allows most architectures to optimize
17 * this. We return whether the PTE actually changed, which in turn
18 * instructs the caller to do things like update__mmu_cache. This
19 * used to be done in the caller, but sparc needs minor faults to
20 * force that call on sun4c so we changed this macro slightly
22 int ptep_set_access_flags(struct vm_area_struct *vma,
23 unsigned long address, pte_t *ptep,
24 pte_t entry, int dirty)
26 int changed = !pte_same(*ptep, entry);
28 set_pte_at(vma->vm_mm, address, ptep, entry);
29 flush_tlb_page(vma, address);
35 #ifndef __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
36 int pmdp_set_access_flags(struct vm_area_struct *vma,
37 unsigned long address, pmd_t *pmdp,
38 pmd_t entry, int dirty)
40 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
41 int changed = !pmd_same(*pmdp, entry);
42 VM_BUG_ON(address & ~HPAGE_PMD_MASK);
44 set_pmd_at(vma->vm_mm, address, pmdp, entry);
45 flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
48 #else /* CONFIG_TRANSPARENT_HUGEPAGE */
51 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
55 #ifndef __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
56 int ptep_clear_flush_young(struct vm_area_struct *vma,
57 unsigned long address, pte_t *ptep)
60 young = ptep_test_and_clear_young(vma, address, ptep);
62 flush_tlb_page(vma, address);
67 #ifndef __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
68 int pmdp_clear_flush_young(struct vm_area_struct *vma,
69 unsigned long address, pmd_t *pmdp)
72 #ifndef CONFIG_TRANSPARENT_HUGEPAGE
74 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
75 VM_BUG_ON(address & ~HPAGE_PMD_MASK);
76 young = pmdp_test_and_clear_young(vma, address, pmdp);
78 flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
83 #ifndef __HAVE_ARCH_PTEP_CLEAR_FLUSH
84 pte_t ptep_clear_flush(struct vm_area_struct *vma, unsigned long address,
88 pte = ptep_get_and_clear((vma)->vm_mm, address, ptep);
89 flush_tlb_page(vma, address);
94 #ifndef __HAVE_ARCH_PMDP_CLEAR_FLUSH
95 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
96 pmd_t pmdp_clear_flush(struct vm_area_struct *vma, unsigned long address,
100 VM_BUG_ON(address & ~HPAGE_PMD_MASK);
101 pmd = pmdp_get_and_clear(vma->vm_mm, address, pmdp);
102 flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
105 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
108 #ifndef __HAVE_ARCH_PMDP_SPLITTING_FLUSH
109 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
110 pmd_t pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
113 pmd_t pmd = pmd_mksplitting(*pmdp);
114 VM_BUG_ON(address & ~HPAGE_PMD_MASK);
115 set_pmd_at(vma->vm_mm, address, pmdp, pmd);
116 /* tlb flush only to serialize against gup-fast */
117 flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
119 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */