Commit | Line | Data |
---|---|---|
71e3aac0 AA |
1 | #ifndef _LINUX_HUGE_MM_H |
2 | #define _LINUX_HUGE_MM_H | |
3 | ||
bae473a4 | 4 | extern int do_huge_pmd_anonymous_page(struct fault_env *fe); |
71e3aac0 AA |
5 | extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, |
6 | pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, | |
7 | struct vm_area_struct *vma); | |
bae473a4 KS |
8 | extern void huge_pmd_set_accessed(struct fault_env *fe, pmd_t orig_pmd); |
9 | extern int do_huge_pmd_wp_page(struct fault_env *fe, pmd_t orig_pmd); | |
b676b293 | 10 | extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, |
71e3aac0 AA |
11 | unsigned long addr, |
12 | pmd_t *pmd, | |
13 | unsigned int flags); | |
b8d3c4c3 MK |
14 | extern int madvise_free_huge_pmd(struct mmu_gather *tlb, |
15 | struct vm_area_struct *vma, | |
16 | pmd_t *pmd, unsigned long addr, unsigned long next); | |
71e3aac0 AA |
17 | extern int zap_huge_pmd(struct mmu_gather *tlb, |
18 | struct vm_area_struct *vma, | |
f21760b1 | 19 | pmd_t *pmd, unsigned long addr); |
0ca1634d JW |
20 | extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
21 | unsigned long addr, unsigned long end, | |
22 | unsigned char *vec); | |
bf8616d5 | 23 | extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, |
37a1c49a AA |
24 | unsigned long new_addr, unsigned long old_end, |
25 | pmd_t *old_pmd, pmd_t *new_pmd); | |
cd7548ab | 26 | extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
4b10e7d5 MG |
27 | unsigned long addr, pgprot_t newprot, |
28 | int prot_numa); | |
5cad465d | 29 | int vmf_insert_pfn_pmd(struct vm_area_struct *, unsigned long addr, pmd_t *, |
f25748e3 | 30 | pfn_t pfn, bool write); |
71e3aac0 AA |
31 | enum transparent_hugepage_flag { |
32 | TRANSPARENT_HUGEPAGE_FLAG, | |
33 | TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, | |
444eb2a4 MG |
34 | TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, |
35 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, | |
71e3aac0 | 36 | TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, |
ba76149f | 37 | TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, |
79da5407 | 38 | TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, |
71e3aac0 AA |
39 | #ifdef CONFIG_DEBUG_VM |
40 | TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, | |
41 | #endif | |
42 | }; | |
43 | ||
b46e756f KS |
44 | struct kobject; |
45 | struct kobj_attribute; | |
46 | ||
47 | extern ssize_t single_hugepage_flag_store(struct kobject *kobj, | |
48 | struct kobj_attribute *attr, | |
49 | const char *buf, size_t count, | |
50 | enum transparent_hugepage_flag flag); | |
51 | extern ssize_t single_hugepage_flag_show(struct kobject *kobj, | |
52 | struct kobj_attribute *attr, char *buf, | |
53 | enum transparent_hugepage_flag flag); | |
5a6e75f8 KS |
54 | extern struct kobj_attribute shmem_enabled_attr; |
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 |
3565fce3 DW |
60 | struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, |
61 | pmd_t *pmd, int flags); | |
62 | ||
fde52796 AK |
63 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
64 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
65 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 66 | |
20995974 AS |
67 | extern bool is_vma_temporary_stack(struct vm_area_struct *vma); |
68 | ||
71e3aac0 | 69 | #define transparent_hugepage_enabled(__vma) \ |
a664b2d8 AA |
70 | ((transparent_hugepage_flags & \ |
71 | (1<<TRANSPARENT_HUGEPAGE_FLAG) || \ | |
72 | (transparent_hugepage_flags & \ | |
73 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ | |
74 | ((__vma)->vm_flags & VM_HUGEPAGE))) && \ | |
a7d6e4ec AA |
75 | !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ |
76 | !is_vma_temporary_stack(__vma)) | |
79da5407 KS |
77 | #define transparent_hugepage_use_zero_page() \ |
78 | (transparent_hugepage_flags & \ | |
79 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 AA |
80 | #ifdef CONFIG_DEBUG_VM |
81 | #define transparent_hugepage_debug_cow() \ | |
82 | (transparent_hugepage_flags & \ | |
83 | (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) | |
84 | #else /* CONFIG_DEBUG_VM */ | |
85 | #define transparent_hugepage_debug_cow() 0 | |
86 | #endif /* CONFIG_DEBUG_VM */ | |
87 | ||
88 | extern unsigned long transparent_hugepage_flags; | |
ad0bed24 | 89 | |
9a982250 KS |
90 | extern void prep_transhuge_page(struct page *page); |
91 | extern void free_transhuge_page(struct page *page); | |
92 | ||
e9b61f19 KS |
93 | int split_huge_page_to_list(struct page *page, struct list_head *list); |
94 | static inline int split_huge_page(struct page *page) | |
95 | { | |
96 | return split_huge_page_to_list(page, NULL); | |
97 | } | |
9a982250 | 98 | void deferred_split_huge_page(struct page *page); |
eef1b3ba KS |
99 | |
100 | void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, | |
33f4751e | 101 | unsigned long address, bool freeze, struct page *page); |
eef1b3ba KS |
102 | |
103 | #define split_huge_pmd(__vma, __pmd, __address) \ | |
104 | do { \ | |
105 | pmd_t *____pmd = (__pmd); \ | |
5c7fb56e DW |
106 | if (pmd_trans_huge(*____pmd) \ |
107 | || pmd_devmap(*____pmd)) \ | |
fec89c10 | 108 | __split_huge_pmd(__vma, __pmd, __address, \ |
33f4751e | 109 | false, NULL); \ |
eef1b3ba | 110 | } while (0) |
ad0bed24 | 111 | |
2a52bcbc | 112 | |
fec89c10 KS |
113 | void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, |
114 | bool freeze, struct page *page); | |
2a52bcbc | 115 | |
60ab3244 AA |
116 | extern int hugepage_madvise(struct vm_area_struct *vma, |
117 | unsigned long *vm_flags, int advice); | |
e1b9996b | 118 | extern void vma_adjust_trans_huge(struct vm_area_struct *vma, |
94fcc585 AA |
119 | unsigned long start, |
120 | unsigned long end, | |
121 | long adjust_next); | |
b6ec57f4 KS |
122 | extern spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, |
123 | struct vm_area_struct *vma); | |
025c5b24 | 124 | /* mmap_sem must be held on entry */ |
b6ec57f4 KS |
125 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
126 | struct vm_area_struct *vma) | |
025c5b24 | 127 | { |
81d1b09c | 128 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); |
5c7fb56e | 129 | if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) |
b6ec57f4 | 130 | return __pmd_trans_huge_lock(pmd, vma); |
025c5b24 | 131 | else |
969e8d7e | 132 | return NULL; |
025c5b24 | 133 | } |
2c888cfb RR |
134 | static inline int hpage_nr_pages(struct page *page) |
135 | { | |
136 | if (unlikely(PageTransHuge(page))) | |
137 | return HPAGE_PMD_NR; | |
138 | return 1; | |
139 | } | |
d10e63f2 | 140 | |
bae473a4 | 141 | extern int do_huge_pmd_numa_page(struct fault_env *fe, pmd_t orig_pmd); |
d10e63f2 | 142 | |
56873f43 WY |
143 | extern struct page *huge_zero_page; |
144 | ||
145 | static inline bool is_huge_zero_page(struct page *page) | |
146 | { | |
147 | return ACCESS_ONCE(huge_zero_page) == page; | |
148 | } | |
149 | ||
fc437044 MW |
150 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
151 | { | |
152 | return is_huge_zero_page(pmd_page(pmd)); | |
153 | } | |
154 | ||
155 | struct page *get_huge_zero_page(void); | |
aa88b68c | 156 | void put_huge_zero_page(void); |
fc437044 | 157 | |
10102459 KS |
158 | #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot)) |
159 | ||
71e3aac0 | 160 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
161 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
162 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
163 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 164 | |
2c888cfb RR |
165 | #define hpage_nr_pages(x) 1 |
166 | ||
71e3aac0 AA |
167 | #define transparent_hugepage_enabled(__vma) 0 |
168 | ||
800d8c63 KS |
169 | static inline void prep_transhuge_page(struct page *page) {} |
170 | ||
71e3aac0 | 171 | #define transparent_hugepage_flags 0UL |
5bc7b8ac SL |
172 | static inline int |
173 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
174 | { | |
175 | return 0; | |
176 | } | |
71e3aac0 AA |
177 | static inline int split_huge_page(struct page *page) |
178 | { | |
179 | return 0; | |
180 | } | |
9a982250 | 181 | static inline void deferred_split_huge_page(struct page *page) {} |
78ddc534 | 182 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 183 | do { } while (0) |
2a52bcbc KS |
184 | |
185 | static inline void split_huge_pmd_address(struct vm_area_struct *vma, | |
fec89c10 | 186 | unsigned long address, bool freeze, struct page *page) {} |
2a52bcbc | 187 | |
60ab3244 AA |
188 | static inline int hugepage_madvise(struct vm_area_struct *vma, |
189 | unsigned long *vm_flags, int advice) | |
0af4e98b AA |
190 | { |
191 | BUG(); | |
192 | return 0; | |
193 | } | |
94fcc585 AA |
194 | static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, |
195 | unsigned long start, | |
196 | unsigned long end, | |
197 | long adjust_next) | |
198 | { | |
199 | } | |
b6ec57f4 KS |
200 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
201 | struct vm_area_struct *vma) | |
025c5b24 | 202 | { |
b6ec57f4 | 203 | return NULL; |
025c5b24 | 204 | } |
d10e63f2 | 205 | |
bae473a4 | 206 | static inline int do_huge_pmd_numa_page(struct fault_env *fe, pmd_t orig_pmd) |
d10e63f2 | 207 | { |
4daae3b4 | 208 | return 0; |
d10e63f2 MG |
209 | } |
210 | ||
56873f43 WY |
211 | static inline bool is_huge_zero_page(struct page *page) |
212 | { | |
213 | return false; | |
214 | } | |
215 | ||
aa88b68c KS |
216 | static inline void put_huge_zero_page(void) |
217 | { | |
218 | BUILD_BUG(); | |
219 | } | |
3565fce3 DW |
220 | |
221 | static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, | |
222 | unsigned long addr, pmd_t *pmd, int flags) | |
223 | { | |
224 | return NULL; | |
225 | } | |
71e3aac0 AA |
226 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
227 | ||
228 | #endif /* _LINUX_HUGE_MM_H */ |