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-rw-r--r--include/asm-generic/pgtable.h217
1 files changed, 157 insertions, 60 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 6f3c6ae4fe03..31b6188df221 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -5,67 +5,100 @@
5#ifdef CONFIG_MMU 5#ifdef CONFIG_MMU
6 6
7#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS 7#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
8/* 8extern int ptep_set_access_flags(struct vm_area_struct *vma,
9 * Largely same as above, but only sets the access flags (dirty, 9 unsigned long address, pte_t *ptep,
10 * accessed, and writable). Furthermore, we know it always gets set 10 pte_t entry, int dirty);
11 * to a "more permissive" setting, which allows most architectures 11#endif
12 * to optimize this. We return whether the PTE actually changed, which 12
13 * in turn instructs the caller to do things like update__mmu_cache. 13#ifndef __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
14 * This used to be done in the caller, but sparc needs minor faults to 14extern int pmdp_set_access_flags(struct vm_area_struct *vma,
15 * force that call on sun4c so we changed this macro slightly 15 unsigned long address, pmd_t *pmdp,
16 */ 16 pmd_t entry, int dirty);
17#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
18({ \
19 int __changed = !pte_same(*(__ptep), __entry); \
20 if (__changed) { \
21 set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \
22 flush_tlb_page(__vma, __address); \
23 } \
24 __changed; \
25})
26#endif 17#endif
27 18
28#ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 19#ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
29#define ptep_test_and_clear_young(__vma, __address, __ptep) \ 20static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
30({ \ 21 unsigned long address,
31 pte_t __pte = *(__ptep); \ 22 pte_t *ptep)
32 int r = 1; \ 23{
33 if (!pte_young(__pte)) \ 24 pte_t pte = *ptep;
34 r = 0; \ 25 int r = 1;
35 else \ 26 if (!pte_young(pte))
36 set_pte_at((__vma)->vm_mm, (__address), \ 27 r = 0;
37 (__ptep), pte_mkold(__pte)); \ 28 else
38 r; \ 29 set_pte_at(vma->vm_mm, address, ptep, pte_mkold(pte));
39}) 30 return r;
31}
32#endif
33
34#ifndef __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
35#ifdef CONFIG_TRANSPARENT_HUGEPAGE
36static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
37 unsigned long address,
38 pmd_t *pmdp)
39{
40 pmd_t pmd = *pmdp;
41 int r = 1;
42 if (!pmd_young(pmd))
43 r = 0;
44 else
45 set_pmd_at(vma->vm_mm, address, pmdp, pmd_mkold(pmd));
46 return r;
47}
48#else /* CONFIG_TRANSPARENT_HUGEPAGE */
49static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
50 unsigned long address,
51 pmd_t *pmdp)
52{
53 BUG();
54 return 0;
55}
56#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
40#endif 57#endif
41 58
42#ifndef __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH 59#ifndef __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
43#define ptep_clear_flush_young(__vma, __address, __ptep) \ 60int ptep_clear_flush_young(struct vm_area_struct *vma,
44({ \ 61 unsigned long address, pte_t *ptep);
45 int __young; \ 62#endif
46 __young = ptep_test_and_clear_young(__vma, __address, __ptep); \ 63
47 if (__young) \ 64#ifndef __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
48 flush_tlb_page(__vma, __address); \ 65int pmdp_clear_flush_young(struct vm_area_struct *vma,
49 __young; \ 66 unsigned long address, pmd_t *pmdp);
50})
51#endif 67#endif
52 68
53#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR 69#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR
54#define ptep_get_and_clear(__mm, __address, __ptep) \ 70static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
55({ \ 71 unsigned long address,
56 pte_t __pte = *(__ptep); \ 72 pte_t *ptep)
57 pte_clear((__mm), (__address), (__ptep)); \ 73{
58 __pte; \ 74 pte_t pte = *ptep;
75 pte_clear(mm, address, ptep);
76 return pte;
77}
78#endif
79
80#ifndef __HAVE_ARCH_PMDP_GET_AND_CLEAR
81#ifdef CONFIG_TRANSPARENT_HUGEPAGE
82static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm,
83 unsigned long address,
84 pmd_t *pmdp)
85{
86 pmd_t pmd = *pmdp;
87 pmd_clear(mm, address, pmdp);
88 return pmd;
59}) 89})
90#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
60#endif 91#endif
61 92
62#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL 93#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
63#define ptep_get_and_clear_full(__mm, __address, __ptep, __full) \ 94static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
64({ \ 95 unsigned long address, pte_t *ptep,
65 pte_t __pte; \ 96 int full)
66 __pte = ptep_get_and_clear((__mm), (__address), (__ptep)); \ 97{
67 __pte; \ 98 pte_t pte;
68}) 99 pte = ptep_get_and_clear(mm, address, ptep);
100 return pte;
101}
69#endif 102#endif
70 103
71/* 104/*
@@ -74,20 +107,25 @@
74 * not present, or in the process of an address space destruction. 107 * not present, or in the process of an address space destruction.
75 */ 108 */
76#ifndef __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL 109#ifndef __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
77#define pte_clear_not_present_full(__mm, __address, __ptep, __full) \ 110static inline void pte_clear_not_present_full(struct mm_struct *mm,
78do { \ 111 unsigned long address,
79 pte_clear((__mm), (__address), (__ptep)); \ 112 pte_t *ptep,
80} while (0) 113 int full)
114{
115 pte_clear(mm, address, ptep);
116}
81#endif 117#endif
82 118
83#ifndef __HAVE_ARCH_PTEP_CLEAR_FLUSH 119#ifndef __HAVE_ARCH_PTEP_CLEAR_FLUSH
84#define ptep_clear_flush(__vma, __address, __ptep) \ 120extern pte_t ptep_clear_flush(struct vm_area_struct *vma,
85({ \ 121 unsigned long address,
86 pte_t __pte; \ 122 pte_t *ptep);
87 __pte = ptep_get_and_clear((__vma)->vm_mm, __address, __ptep); \ 123#endif
88 flush_tlb_page(__vma, __address); \ 124
89 __pte; \ 125#ifndef __HAVE_ARCH_PMDP_CLEAR_FLUSH
90}) 126extern pmd_t pmdp_clear_flush(struct vm_area_struct *vma,
127 unsigned long address,
128 pmd_t *pmdp);
91#endif 129#endif
92 130
93#ifndef __HAVE_ARCH_PTEP_SET_WRPROTECT 131#ifndef __HAVE_ARCH_PTEP_SET_WRPROTECT
@@ -99,8 +137,49 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
99} 137}
100#endif 138#endif
101 139
140#ifndef __HAVE_ARCH_PMDP_SET_WRPROTECT
141#ifdef CONFIG_TRANSPARENT_HUGEPAGE
142static inline void pmdp_set_wrprotect(struct mm_struct *mm,
143 unsigned long address, pmd_t *pmdp)
144{
145 pmd_t old_pmd = *pmdp;
146 set_pmd_at(mm, address, pmdp, pmd_wrprotect(old_pmd));
147}
148#else /* CONFIG_TRANSPARENT_HUGEPAGE */
149static inline void pmdp_set_wrprotect(struct mm_struct *mm,
150 unsigned long address, pmd_t *pmdp)
151{
152 BUG();
153}
154#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
155#endif
156
157#ifndef __HAVE_ARCH_PMDP_SPLITTING_FLUSH
158extern pmd_t pmdp_splitting_flush(struct vm_area_struct *vma,
159 unsigned long address,
160 pmd_t *pmdp);
161#endif
162
102#ifndef __HAVE_ARCH_PTE_SAME 163#ifndef __HAVE_ARCH_PTE_SAME
103#define pte_same(A,B) (pte_val(A) == pte_val(B)) 164static inline int pte_same(pte_t pte_a, pte_t pte_b)
165{
166 return pte_val(pte_a) == pte_val(pte_b);
167}
168#endif
169
170#ifndef __HAVE_ARCH_PMD_SAME
171#ifdef CONFIG_TRANSPARENT_HUGEPAGE
172static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
173{
174 return pmd_val(pmd_a) == pmd_val(pmd_b);
175}
176#else /* CONFIG_TRANSPARENT_HUGEPAGE */
177static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
178{
179 BUG();
180 return 0;
181}
182#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
104#endif 183#endif
105 184
106#ifndef __HAVE_ARCH_PAGE_TEST_DIRTY 185#ifndef __HAVE_ARCH_PAGE_TEST_DIRTY
@@ -348,6 +427,24 @@ extern void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn,
348 unsigned long size); 427 unsigned long size);
349#endif 428#endif
350 429
430#ifndef CONFIG_TRANSPARENT_HUGEPAGE
431static inline int pmd_trans_huge(pmd_t pmd)
432{
433 return 0;
434}
435static inline int pmd_trans_splitting(pmd_t pmd)
436{
437 return 0;
438}
439#ifndef __HAVE_ARCH_PMD_WRITE
440static inline int pmd_write(pmd_t pmd)
441{
442 BUG();
443 return 0;
444}
445#endif /* __HAVE_ARCH_PMD_WRITE */
446#endif
447
351#endif /* !__ASSEMBLY__ */ 448#endif /* !__ASSEMBLY__ */
352 449
353#endif /* _ASM_GENERIC_PGTABLE_H */ 450#endif /* _ASM_GENERIC_PGTABLE_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-13 17:17:50 -0500