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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 | ||
71e3aac0 AA |
51 | extern pmd_t *page_check_address_pmd(struct page *page, |
52 | struct mm_struct *mm, | |
53 | unsigned long address, | |
117b0791 | 54 | spinlock_t **ptl); |
71e3aac0 | 55 | |
d8c37c48 NH |
56 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) |
57 | #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) | |
58 | ||
71e3aac0 | 59 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
fde52796 AK |
60 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
61 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
62 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 63 | |
20995974 AS |
64 | extern bool is_vma_temporary_stack(struct vm_area_struct *vma); |
65 | ||
71e3aac0 | 66 | #define transparent_hugepage_enabled(__vma) \ |
a664b2d8 AA |
67 | ((transparent_hugepage_flags & \ |
68 | (1<<TRANSPARENT_HUGEPAGE_FLAG) || \ | |
69 | (transparent_hugepage_flags & \ | |
70 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ | |
71 | ((__vma)->vm_flags & VM_HUGEPAGE))) && \ | |
a7d6e4ec AA |
72 | !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ |
73 | !is_vma_temporary_stack(__vma)) | |
71e3aac0 AA |
74 | #define transparent_hugepage_defrag(__vma) \ |
75 | ((transparent_hugepage_flags & \ | |
76 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)) || \ | |
77 | (transparent_hugepage_flags & \ | |
78 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG) && \ | |
79 | (__vma)->vm_flags & VM_HUGEPAGE)) | |
79da5407 KS |
80 | #define transparent_hugepage_use_zero_page() \ |
81 | (transparent_hugepage_flags & \ | |
82 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 AA |
83 | #ifdef CONFIG_DEBUG_VM |
84 | #define transparent_hugepage_debug_cow() \ | |
85 | (transparent_hugepage_flags & \ | |
86 | (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) | |
87 | #else /* CONFIG_DEBUG_VM */ | |
88 | #define transparent_hugepage_debug_cow() 0 | |
89 | #endif /* CONFIG_DEBUG_VM */ | |
90 | ||
91 | extern unsigned long transparent_hugepage_flags; | |
ad0bed24 KS |
92 | |
93 | #define split_huge_page_to_list(page, list) BUILD_BUG() | |
94 | #define split_huge_page(page) BUILD_BUG() | |
95 | #define split_huge_pmd(__vma, __pmd, __address) BUILD_BUG() | |
96 | ||
dfa5e237 | 97 | #if HPAGE_PMD_ORDER >= MAX_ORDER |
71e3aac0 AA |
98 | #error "hugepages can't be allocated by the buddy allocator" |
99 | #endif | |
60ab3244 AA |
100 | extern int hugepage_madvise(struct vm_area_struct *vma, |
101 | unsigned long *vm_flags, int advice); | |
e1b9996b | 102 | extern void vma_adjust_trans_huge(struct vm_area_struct *vma, |
94fcc585 AA |
103 | unsigned long start, |
104 | unsigned long end, | |
105 | long adjust_next); | |
4b471e88 | 106 | extern bool __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, |
bf929152 | 107 | spinlock_t **ptl); |
025c5b24 | 108 | /* mmap_sem must be held on entry */ |
4b471e88 | 109 | static inline bool pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, |
bf929152 | 110 | spinlock_t **ptl) |
025c5b24 | 111 | { |
81d1b09c | 112 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); |
025c5b24 | 113 | if (pmd_trans_huge(*pmd)) |
bf929152 | 114 | return __pmd_trans_huge_lock(pmd, vma, ptl); |
025c5b24 | 115 | else |
4b471e88 | 116 | return false; |
025c5b24 | 117 | } |
2c888cfb RR |
118 | static inline int hpage_nr_pages(struct page *page) |
119 | { | |
120 | if (unlikely(PageTransHuge(page))) | |
121 | return HPAGE_PMD_NR; | |
122 | return 1; | |
123 | } | |
d10e63f2 | 124 | |
4daae3b4 MG |
125 | extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, |
126 | unsigned long addr, pmd_t pmd, pmd_t *pmdp); | |
d10e63f2 | 127 | |
56873f43 WY |
128 | extern struct page *huge_zero_page; |
129 | ||
130 | static inline bool is_huge_zero_page(struct page *page) | |
131 | { | |
132 | return ACCESS_ONCE(huge_zero_page) == page; | |
133 | } | |
134 | ||
fc437044 MW |
135 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
136 | { | |
137 | return is_huge_zero_page(pmd_page(pmd)); | |
138 | } | |
139 | ||
140 | struct page *get_huge_zero_page(void); | |
fc437044 | 141 | |
71e3aac0 | 142 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
143 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
144 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
145 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 146 | |
2c888cfb RR |
147 | #define hpage_nr_pages(x) 1 |
148 | ||
71e3aac0 AA |
149 | #define transparent_hugepage_enabled(__vma) 0 |
150 | ||
151 | #define transparent_hugepage_flags 0UL | |
5bc7b8ac SL |
152 | static inline int |
153 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
154 | { | |
155 | return 0; | |
156 | } | |
71e3aac0 AA |
157 | static inline int split_huge_page(struct page *page) |
158 | { | |
159 | return 0; | |
160 | } | |
78ddc534 | 161 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 162 | do { } while (0) |
60ab3244 AA |
163 | static inline int hugepage_madvise(struct vm_area_struct *vma, |
164 | unsigned long *vm_flags, int advice) | |
0af4e98b AA |
165 | { |
166 | BUG(); | |
167 | return 0; | |
168 | } | |
94fcc585 AA |
169 | static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, |
170 | unsigned long start, | |
171 | unsigned long end, | |
172 | long adjust_next) | |
173 | { | |
174 | } | |
4b471e88 | 175 | static inline bool pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, |
bf929152 | 176 | spinlock_t **ptl) |
025c5b24 | 177 | { |
4b471e88 | 178 | return false; |
025c5b24 | 179 | } |
d10e63f2 | 180 | |
4daae3b4 MG |
181 | static inline int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, |
182 | unsigned long addr, pmd_t pmd, pmd_t *pmdp) | |
d10e63f2 | 183 | { |
4daae3b4 | 184 | return 0; |
d10e63f2 MG |
185 | } |
186 | ||
56873f43 WY |
187 | static inline bool is_huge_zero_page(struct page *page) |
188 | { | |
189 | return false; | |
190 | } | |
191 | ||
71e3aac0 AA |
192 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
193 | ||
194 | #endif /* _LINUX_HUGE_MM_H */ |