1 #ifndef _LINUX_HUGETLB_H
2 #define _LINUX_HUGETLB_H
4 #include <linux/mm_types.h>
6 #include <linux/hugetlb_inline.h>
11 #ifdef CONFIG_HUGETLB_PAGE
13 #include <linux/mempolicy.h>
14 #include <linux/shm.h>
15 #include <asm/tlbflush.h>
17 struct hugepage_subpool
{
20 long max_hpages
, used_hpages
;
23 struct hugepage_subpool
*hugepage_new_subpool(long nr_blocks
);
24 void hugepage_put_subpool(struct hugepage_subpool
*spool
);
26 int PageHuge(struct page
*page
);
28 void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
);
29 int hugetlb_sysctl_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
30 int hugetlb_overcommit_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
31 int hugetlb_treat_movable_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
34 int hugetlb_mempolicy_sysctl_handler(struct ctl_table
*, int,
35 void __user
*, size_t *, loff_t
*);
38 int copy_hugetlb_page_range(struct mm_struct
*, struct mm_struct
*, struct vm_area_struct
*);
39 int follow_hugetlb_page(struct mm_struct
*, struct vm_area_struct
*,
40 struct page
**, struct vm_area_struct
**,
41 unsigned long *, int *, int, unsigned int flags
);
42 void unmap_hugepage_range(struct vm_area_struct
*,
43 unsigned long, unsigned long, struct page
*);
44 void __unmap_hugepage_range(struct vm_area_struct
*,
45 unsigned long, unsigned long, struct page
*);
46 int hugetlb_prefault(struct address_space
*, struct vm_area_struct
*);
47 void hugetlb_report_meminfo(struct seq_file
*);
48 int hugetlb_report_node_meminfo(int, char *);
49 unsigned long hugetlb_total_pages(void);
50 int hugetlb_fault(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
51 unsigned long address
, unsigned int flags
);
52 int hugetlb_reserve_pages(struct inode
*inode
, long from
, long to
,
53 struct vm_area_struct
*vma
,
55 void hugetlb_unreserve_pages(struct inode
*inode
, long offset
, long freed
);
56 int dequeue_hwpoisoned_huge_page(struct page
*page
);
57 void copy_huge_page(struct page
*dst
, struct page
*src
);
59 extern unsigned long hugepages_treat_as_movable
;
60 extern const unsigned long hugetlb_zero
, hugetlb_infinity
;
61 extern int sysctl_hugetlb_shm_group
;
62 extern struct list_head huge_boot_pages
;
66 pte_t
*huge_pte_alloc(struct mm_struct
*mm
,
67 unsigned long addr
, unsigned long sz
);
68 pte_t
*huge_pte_offset(struct mm_struct
*mm
, unsigned long addr
);
69 int huge_pmd_unshare(struct mm_struct
*mm
, unsigned long *addr
, pte_t
*ptep
);
70 struct page
*follow_huge_addr(struct mm_struct
*mm
, unsigned long address
,
72 struct page
*follow_huge_pmd(struct mm_struct
*mm
, unsigned long address
,
73 pmd_t
*pmd
, int write
);
74 struct page
*follow_huge_pud(struct mm_struct
*mm
, unsigned long address
,
75 pud_t
*pud
, int write
);
76 int pmd_huge(pmd_t pmd
);
77 int pud_huge(pud_t pmd
);
78 void hugetlb_change_protection(struct vm_area_struct
*vma
,
79 unsigned long address
, unsigned long end
, pgprot_t newprot
);
81 #else /* !CONFIG_HUGETLB_PAGE */
83 static inline int PageHuge(struct page
*page
)
88 static inline void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
)
92 static inline unsigned long hugetlb_total_pages(void)
97 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
98 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
99 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
100 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
101 #define unmap_hugepage_range(vma, start, end, page) BUG()
102 static inline void hugetlb_report_meminfo(struct seq_file
*m
)
105 #define hugetlb_report_node_meminfo(n, buf) 0
106 #define follow_huge_pmd(mm, addr, pmd, write) NULL
107 #define follow_huge_pud(mm, addr, pud, write) NULL
108 #define prepare_hugepage_range(file, addr, len) (-EINVAL)
109 #define pmd_huge(x) 0
110 #define pud_huge(x) 0
111 #define is_hugepage_only_range(mm, addr, len) 0
112 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
113 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
114 #define huge_pte_offset(mm, address) 0
115 #define dequeue_hwpoisoned_huge_page(page) 0
116 static inline void copy_huge_page(struct page
*dst
, struct page
*src
)
120 #define hugetlb_change_protection(vma, address, end, newprot)
122 #endif /* !CONFIG_HUGETLB_PAGE */
124 #define HUGETLB_ANON_FILE "anon_hugepage"
128 * The file will be used as an shm file so shmfs accounting rules
131 HUGETLB_SHMFS_INODE
= 1,
133 * The file is being created on the internal vfs mount and shmfs
134 * accounting rules do not apply
136 HUGETLB_ANONHUGE_INODE
= 2,
139 #ifdef CONFIG_HUGETLBFS
140 struct hugetlbfs_sb_info
{
141 long max_inodes
; /* inodes allowed */
142 long free_inodes
; /* inodes free */
143 spinlock_t stat_lock
;
144 struct hstate
*hstate
;
145 struct hugepage_subpool
*spool
;
148 static inline struct hugetlbfs_sb_info
*HUGETLBFS_SB(struct super_block
*sb
)
150 return sb
->s_fs_info
;
153 extern const struct file_operations hugetlbfs_file_operations
;
154 extern const struct vm_operations_struct hugetlb_vm_ops
;
155 struct file
*hugetlb_file_setup(const char *name
, unsigned long addr
,
156 size_t size
, vm_flags_t acct
,
157 struct user_struct
**user
, int creat_flags
);
159 static inline int is_file_hugepages(struct file
*file
)
161 if (file
->f_op
== &hugetlbfs_file_operations
)
163 if (is_file_shm_hugepages(file
))
169 #else /* !CONFIG_HUGETLBFS */
171 #define is_file_hugepages(file) 0
172 static inline struct file
*
173 hugetlb_file_setup(const char *name
, unsigned long addr
, size_t size
,
174 vm_flags_t acctflag
, struct user_struct
**user
, int creat_flags
)
176 return ERR_PTR(-ENOSYS
);
179 #endif /* !CONFIG_HUGETLBFS */
181 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
182 unsigned long hugetlb_get_unmapped_area(struct file
*file
, unsigned long addr
,
183 unsigned long len
, unsigned long pgoff
,
184 unsigned long flags
);
185 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
187 #ifdef CONFIG_HUGETLB_PAGE
189 #define HSTATE_NAME_LEN 32
190 /* Defines one hugetlb page size */
192 int next_nid_to_alloc
;
193 int next_nid_to_free
;
196 unsigned long max_huge_pages
;
197 unsigned long nr_huge_pages
;
198 unsigned long free_huge_pages
;
199 unsigned long resv_huge_pages
;
200 unsigned long surplus_huge_pages
;
201 unsigned long nr_overcommit_huge_pages
;
202 struct list_head hugepage_freelists
[MAX_NUMNODES
];
203 unsigned int nr_huge_pages_node
[MAX_NUMNODES
];
204 unsigned int free_huge_pages_node
[MAX_NUMNODES
];
205 unsigned int surplus_huge_pages_node
[MAX_NUMNODES
];
206 char name
[HSTATE_NAME_LEN
];
209 struct huge_bootmem_page
{
210 struct list_head list
;
211 struct hstate
*hstate
;
212 #ifdef CONFIG_HIGHMEM
217 struct page
*alloc_huge_page_node(struct hstate
*h
, int nid
);
220 int __init
alloc_bootmem_huge_page(struct hstate
*h
);
222 void __init
hugetlb_add_hstate(unsigned order
);
223 struct hstate
*size_to_hstate(unsigned long size
);
225 #ifndef HUGE_MAX_HSTATE
226 #define HUGE_MAX_HSTATE 1
229 extern struct hstate hstates
[HUGE_MAX_HSTATE
];
230 extern unsigned int default_hstate_idx
;
232 #define default_hstate (hstates[default_hstate_idx])
234 static inline struct hstate
*hstate_inode(struct inode
*i
)
236 struct hugetlbfs_sb_info
*hsb
;
237 hsb
= HUGETLBFS_SB(i
->i_sb
);
241 static inline struct hstate
*hstate_file(struct file
*f
)
243 return hstate_inode(f
->f_dentry
->d_inode
);
246 static inline struct hstate
*hstate_vma(struct vm_area_struct
*vma
)
248 return hstate_file(vma
->vm_file
);
251 static inline unsigned long huge_page_size(struct hstate
*h
)
253 return (unsigned long)PAGE_SIZE
<< h
->order
;
256 extern unsigned long vma_kernel_pagesize(struct vm_area_struct
*vma
);
258 extern unsigned long vma_mmu_pagesize(struct vm_area_struct
*vma
);
260 static inline unsigned long huge_page_mask(struct hstate
*h
)
265 static inline unsigned int huge_page_order(struct hstate
*h
)
270 static inline unsigned huge_page_shift(struct hstate
*h
)
272 return h
->order
+ PAGE_SHIFT
;
275 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
277 return 1 << h
->order
;
280 static inline unsigned int blocks_per_huge_page(struct hstate
*h
)
282 return huge_page_size(h
) / 512;
285 #include <asm/hugetlb.h>
287 static inline struct hstate
*page_hstate(struct page
*page
)
289 return size_to_hstate(PAGE_SIZE
<< compound_order(page
));
292 static inline unsigned hstate_index_to_shift(unsigned index
)
294 return hstates
[index
].order
+ PAGE_SHIFT
;
299 #define alloc_huge_page_node(h, nid) NULL
300 #define alloc_bootmem_huge_page(h) NULL
301 #define hstate_file(f) NULL
302 #define hstate_vma(v) NULL
303 #define hstate_inode(i) NULL
304 #define huge_page_size(h) PAGE_SIZE
305 #define huge_page_mask(h) PAGE_MASK
306 #define vma_kernel_pagesize(v) PAGE_SIZE
307 #define vma_mmu_pagesize(v) PAGE_SIZE
308 #define huge_page_order(h) 0
309 #define huge_page_shift(h) PAGE_SHIFT
310 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
314 #define hstate_index_to_shift(index) 0
317 #endif /* _LINUX_HUGETLB_H */