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71e3aac0 AA |
1 | #ifndef _LINUX_HUGE_MM_H |
2 | #define _LINUX_HUGE_MM_H | |
3 | ||
4 | extern int do_huge_pmd_anonymous_page(struct mm_struct *mm, | |
5 | struct vm_area_struct *vma, | |
6 | unsigned long address, pmd_t *pmd, | |
7 | unsigned int flags); | |
8 | extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, | |
9 | pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, | |
10 | struct vm_area_struct *vma); | |
a1dd450b WD |
11 | extern void huge_pmd_set_accessed(struct mm_struct *mm, |
12 | struct vm_area_struct *vma, | |
13 | unsigned long address, pmd_t *pmd, | |
14 | pmd_t orig_pmd, int dirty); | |
71e3aac0 AA |
15 | extern int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, |
16 | unsigned long address, pmd_t *pmd, | |
17 | pmd_t orig_pmd); | |
b676b293 | 18 | extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, |
71e3aac0 AA |
19 | unsigned long addr, |
20 | pmd_t *pmd, | |
21 | unsigned int flags); | |
22 | extern int zap_huge_pmd(struct mmu_gather *tlb, | |
23 | struct vm_area_struct *vma, | |
f21760b1 | 24 | pmd_t *pmd, unsigned long addr); |
0ca1634d JW |
25 | extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
26 | unsigned long addr, unsigned long end, | |
27 | unsigned char *vec); | |
4b471e88 | 28 | extern bool move_huge_pmd(struct vm_area_struct *vma, |
37a1c49a AA |
29 | struct vm_area_struct *new_vma, |
30 | unsigned long old_addr, | |
31 | unsigned long new_addr, unsigned long old_end, | |
32 | pmd_t *old_pmd, pmd_t *new_pmd); | |
cd7548ab | 33 | extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
4b10e7d5 MG |
34 | unsigned long addr, pgprot_t newprot, |
35 | int prot_numa); | |
5cad465d MW |
36 | int vmf_insert_pfn_pmd(struct vm_area_struct *, unsigned long addr, pmd_t *, |
37 | unsigned long pfn, bool write); | |
71e3aac0 AA |
38 | |
39 | enum transparent_hugepage_flag { | |
40 | TRANSPARENT_HUGEPAGE_FLAG, | |
41 | TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, | |
42 | TRANSPARENT_HUGEPAGE_DEFRAG_FLAG, | |
43 | TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, | |
ba76149f | 44 | TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, |
79da5407 | 45 | TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, |
71e3aac0 AA |
46 | #ifdef CONFIG_DEBUG_VM |
47 | TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, | |
48 | #endif | |
49 | }; | |
50 | ||
d8c37c48 NH |
51 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) |
52 | #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) | |
53 | ||
71e3aac0 | 54 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
fde52796 AK |
55 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
56 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
57 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 58 | |
20995974 AS |
59 | extern bool is_vma_temporary_stack(struct vm_area_struct *vma); |
60 | ||
71e3aac0 | 61 | #define transparent_hugepage_enabled(__vma) \ |
a664b2d8 AA |
62 | ((transparent_hugepage_flags & \ |
63 | (1<<TRANSPARENT_HUGEPAGE_FLAG) || \ | |
64 | (transparent_hugepage_flags & \ | |
65 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ | |
66 | ((__vma)->vm_flags & VM_HUGEPAGE))) && \ | |
a7d6e4ec AA |
67 | !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ |
68 | !is_vma_temporary_stack(__vma)) | |
71e3aac0 AA |
69 | #define transparent_hugepage_defrag(__vma) \ |
70 | ((transparent_hugepage_flags & \ | |
71 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)) || \ | |
72 | (transparent_hugepage_flags & \ | |
73 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG) && \ | |
74 | (__vma)->vm_flags & VM_HUGEPAGE)) | |
79da5407 KS |
75 | #define transparent_hugepage_use_zero_page() \ |
76 | (transparent_hugepage_flags & \ | |
77 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 AA |
78 | #ifdef CONFIG_DEBUG_VM |
79 | #define transparent_hugepage_debug_cow() \ | |
80 | (transparent_hugepage_flags & \ | |
81 | (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) | |
82 | #else /* CONFIG_DEBUG_VM */ | |
83 | #define transparent_hugepage_debug_cow() 0 | |
84 | #endif /* CONFIG_DEBUG_VM */ | |
85 | ||
86 | extern unsigned long transparent_hugepage_flags; | |
ad0bed24 | 87 | |
9a982250 KS |
88 | extern void prep_transhuge_page(struct page *page); |
89 | extern void free_transhuge_page(struct page *page); | |
90 | ||
e9b61f19 KS |
91 | int split_huge_page_to_list(struct page *page, struct list_head *list); |
92 | static inline int split_huge_page(struct page *page) | |
93 | { | |
94 | return split_huge_page_to_list(page, NULL); | |
95 | } | |
9a982250 | 96 | void deferred_split_huge_page(struct page *page); |
eef1b3ba KS |
97 | |
98 | void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, | |
99 | unsigned long address); | |
100 | ||
101 | #define split_huge_pmd(__vma, __pmd, __address) \ | |
102 | do { \ | |
103 | pmd_t *____pmd = (__pmd); \ | |
104 | if (pmd_trans_huge(*____pmd)) \ | |
105 | __split_huge_pmd(__vma, __pmd, __address); \ | |
106 | } while (0) | |
ad0bed24 | 107 | |
dfa5e237 | 108 | #if HPAGE_PMD_ORDER >= MAX_ORDER |
71e3aac0 AA |
109 | #error "hugepages can't be allocated by the buddy allocator" |
110 | #endif | |
60ab3244 AA |
111 | extern int hugepage_madvise(struct vm_area_struct *vma, |
112 | unsigned long *vm_flags, int advice); | |
e1b9996b | 113 | extern void vma_adjust_trans_huge(struct vm_area_struct *vma, |
94fcc585 AA |
114 | unsigned long start, |
115 | unsigned long end, | |
116 | long adjust_next); | |
4b471e88 | 117 | extern bool __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, |
bf929152 | 118 | spinlock_t **ptl); |
025c5b24 | 119 | /* mmap_sem must be held on entry */ |
4b471e88 | 120 | static inline bool pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, |
bf929152 | 121 | spinlock_t **ptl) |
025c5b24 | 122 | { |
81d1b09c | 123 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); |
025c5b24 | 124 | if (pmd_trans_huge(*pmd)) |
bf929152 | 125 | return __pmd_trans_huge_lock(pmd, vma, ptl); |
025c5b24 | 126 | else |
4b471e88 | 127 | return false; |
025c5b24 | 128 | } |
2c888cfb RR |
129 | static inline int hpage_nr_pages(struct page *page) |
130 | { | |
131 | if (unlikely(PageTransHuge(page))) | |
132 | return HPAGE_PMD_NR; | |
133 | return 1; | |
134 | } | |
d10e63f2 | 135 | |
4daae3b4 MG |
136 | extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, |
137 | unsigned long addr, pmd_t pmd, pmd_t *pmdp); | |
d10e63f2 | 138 | |
56873f43 WY |
139 | extern struct page *huge_zero_page; |
140 | ||
141 | static inline bool is_huge_zero_page(struct page *page) | |
142 | { | |
143 | return ACCESS_ONCE(huge_zero_page) == page; | |
144 | } | |
145 | ||
fc437044 MW |
146 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
147 | { | |
148 | return is_huge_zero_page(pmd_page(pmd)); | |
149 | } | |
150 | ||
151 | struct page *get_huge_zero_page(void); | |
fc437044 | 152 | |
71e3aac0 | 153 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
154 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
155 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
156 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 157 | |
2c888cfb RR |
158 | #define hpage_nr_pages(x) 1 |
159 | ||
71e3aac0 AA |
160 | #define transparent_hugepage_enabled(__vma) 0 |
161 | ||
162 | #define transparent_hugepage_flags 0UL | |
5bc7b8ac SL |
163 | static inline int |
164 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
165 | { | |
166 | return 0; | |
167 | } | |
71e3aac0 AA |
168 | static inline int split_huge_page(struct page *page) |
169 | { | |
170 | return 0; | |
171 | } | |
9a982250 | 172 | static inline void deferred_split_huge_page(struct page *page) {} |
78ddc534 | 173 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 174 | do { } while (0) |
60ab3244 AA |
175 | static inline int hugepage_madvise(struct vm_area_struct *vma, |
176 | unsigned long *vm_flags, int advice) | |
0af4e98b AA |
177 | { |
178 | BUG(); | |
179 | return 0; | |
180 | } | |
94fcc585 AA |
181 | static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, |
182 | unsigned long start, | |
183 | unsigned long end, | |
184 | long adjust_next) | |
185 | { | |
186 | } | |
4b471e88 | 187 | static inline bool pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, |
bf929152 | 188 | spinlock_t **ptl) |
025c5b24 | 189 | { |
4b471e88 | 190 | return false; |
025c5b24 | 191 | } |
d10e63f2 | 192 | |
4daae3b4 MG |
193 | static inline int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, |
194 | unsigned long addr, pmd_t pmd, pmd_t *pmdp) | |
d10e63f2 | 195 | { |
4daae3b4 | 196 | return 0; |
d10e63f2 MG |
197 | } |
198 | ||
56873f43 WY |
199 | static inline bool is_huge_zero_page(struct page *page) |
200 | { | |
201 | return false; | |
202 | } | |
203 | ||
71e3aac0 AA |
204 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
205 | ||
206 | #endif /* _LINUX_HUGE_MM_H */ |