1 #ifndef _LINUX_HUGETLB_H
2 #define _LINUX_HUGETLB_H
4 #include <linux/mm_types.h>
6 #include <linux/hugetlb_inline.h>
7 #include <linux/cgroup.h>
13 #ifdef CONFIG_HUGETLB_PAGE
15 #include <linux/mempolicy.h>
16 #include <linux/shm.h>
17 #include <asm/tlbflush.h>
19 struct hugepage_subpool
{
22 long max_hpages
, used_hpages
;
25 extern spinlock_t hugetlb_lock
;
26 extern int hugetlb_max_hstate __read_mostly
;
27 #define for_each_hstate(h) \
28 for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)
30 struct hugepage_subpool
*hugepage_new_subpool(long nr_blocks
);
31 void hugepage_put_subpool(struct hugepage_subpool
*spool
);
33 int PageHuge(struct page
*page
);
35 void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
);
36 int hugetlb_sysctl_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
37 int hugetlb_overcommit_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
38 int hugetlb_treat_movable_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
41 int hugetlb_mempolicy_sysctl_handler(struct ctl_table
*, int,
42 void __user
*, size_t *, loff_t
*);
45 int copy_hugetlb_page_range(struct mm_struct
*, struct mm_struct
*, struct vm_area_struct
*);
46 int follow_hugetlb_page(struct mm_struct
*, struct vm_area_struct
*,
47 struct page
**, struct vm_area_struct
**,
48 unsigned long *, int *, int, unsigned int flags
);
49 void unmap_hugepage_range(struct vm_area_struct
*,
50 unsigned long, unsigned long, struct page
*);
51 void __unmap_hugepage_range_final(struct mmu_gather
*tlb
,
52 struct vm_area_struct
*vma
,
53 unsigned long start
, unsigned long end
,
54 struct page
*ref_page
);
55 void __unmap_hugepage_range(struct mmu_gather
*tlb
, struct vm_area_struct
*vma
,
56 unsigned long start
, unsigned long end
,
57 struct page
*ref_page
);
58 int hugetlb_prefault(struct address_space
*, struct vm_area_struct
*);
59 void hugetlb_report_meminfo(struct seq_file
*);
60 int hugetlb_report_node_meminfo(int, char *);
61 unsigned long hugetlb_total_pages(void);
62 int hugetlb_fault(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
63 unsigned long address
, unsigned int flags
);
64 int hugetlb_reserve_pages(struct inode
*inode
, long from
, long to
,
65 struct vm_area_struct
*vma
,
67 void hugetlb_unreserve_pages(struct inode
*inode
, long offset
, long freed
);
68 int dequeue_hwpoisoned_huge_page(struct page
*page
);
69 void copy_huge_page(struct page
*dst
, struct page
*src
);
71 extern unsigned long hugepages_treat_as_movable
;
72 extern const unsigned long hugetlb_zero
, hugetlb_infinity
;
73 extern int sysctl_hugetlb_shm_group
;
74 extern struct list_head huge_boot_pages
;
78 pte_t
*huge_pte_alloc(struct mm_struct
*mm
,
79 unsigned long addr
, unsigned long sz
);
80 pte_t
*huge_pte_offset(struct mm_struct
*mm
, unsigned long addr
);
81 int huge_pmd_unshare(struct mm_struct
*mm
, unsigned long *addr
, pte_t
*ptep
);
82 struct page
*follow_huge_addr(struct mm_struct
*mm
, unsigned long address
,
84 struct page
*follow_huge_pmd(struct mm_struct
*mm
, unsigned long address
,
85 pmd_t
*pmd
, int write
);
86 struct page
*follow_huge_pud(struct mm_struct
*mm
, unsigned long address
,
87 pud_t
*pud
, int write
);
88 int pmd_huge(pmd_t pmd
);
89 int pud_huge(pud_t pmd
);
90 unsigned long hugetlb_change_protection(struct vm_area_struct
*vma
,
91 unsigned long address
, unsigned long end
, pgprot_t newprot
);
93 #else /* !CONFIG_HUGETLB_PAGE */
95 static inline int PageHuge(struct page
*page
)
100 static inline void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
)
104 static inline unsigned long hugetlb_total_pages(void)
109 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
110 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
111 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
112 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
113 static inline void hugetlb_report_meminfo(struct seq_file
*m
)
116 #define hugetlb_report_node_meminfo(n, buf) 0
117 #define follow_huge_pmd(mm, addr, pmd, write) NULL
118 #define follow_huge_pud(mm, addr, pud, write) NULL
119 #define prepare_hugepage_range(file, addr, len) (-EINVAL)
120 #define pmd_huge(x) 0
121 #define pud_huge(x) 0
122 #define is_hugepage_only_range(mm, addr, len) 0
123 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
124 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
125 #define huge_pte_offset(mm, address) 0
126 static inline int dequeue_hwpoisoned_huge_page(struct page
*page
)
131 static inline void copy_huge_page(struct page
*dst
, struct page
*src
)
135 static inline unsigned long hugetlb_change_protection(struct vm_area_struct
*vma
,
136 unsigned long address
, unsigned long end
, pgprot_t newprot
)
141 static inline void __unmap_hugepage_range_final(struct mmu_gather
*tlb
,
142 struct vm_area_struct
*vma
, unsigned long start
,
143 unsigned long end
, struct page
*ref_page
)
148 static inline void __unmap_hugepage_range(struct mmu_gather
*tlb
,
149 struct vm_area_struct
*vma
, unsigned long start
,
150 unsigned long end
, struct page
*ref_page
)
155 #endif /* !CONFIG_HUGETLB_PAGE */
157 #define HUGETLB_ANON_FILE "anon_hugepage"
161 * The file will be used as an shm file so shmfs accounting rules
164 HUGETLB_SHMFS_INODE
= 1,
166 * The file is being created on the internal vfs mount and shmfs
167 * accounting rules do not apply
169 HUGETLB_ANONHUGE_INODE
= 2,
172 #ifdef CONFIG_HUGETLBFS
173 struct hugetlbfs_sb_info
{
174 long max_inodes
; /* inodes allowed */
175 long free_inodes
; /* inodes free */
176 spinlock_t stat_lock
;
177 struct hstate
*hstate
;
178 struct hugepage_subpool
*spool
;
181 static inline struct hugetlbfs_sb_info
*HUGETLBFS_SB(struct super_block
*sb
)
183 return sb
->s_fs_info
;
186 extern const struct file_operations hugetlbfs_file_operations
;
187 extern const struct vm_operations_struct hugetlb_vm_ops
;
188 struct file
*hugetlb_file_setup(const char *name
, unsigned long addr
,
189 size_t size
, vm_flags_t acct
,
190 struct user_struct
**user
, int creat_flags
,
193 static inline int is_file_hugepages(struct file
*file
)
195 if (file
->f_op
== &hugetlbfs_file_operations
)
197 if (is_file_shm_hugepages(file
))
204 #else /* !CONFIG_HUGETLBFS */
206 #define is_file_hugepages(file) 0
207 static inline struct file
*
208 hugetlb_file_setup(const char *name
, unsigned long addr
, size_t size
,
209 vm_flags_t acctflag
, struct user_struct
**user
, int creat_flags
,
212 return ERR_PTR(-ENOSYS
);
215 #endif /* !CONFIG_HUGETLBFS */
217 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
218 unsigned long hugetlb_get_unmapped_area(struct file
*file
, unsigned long addr
,
219 unsigned long len
, unsigned long pgoff
,
220 unsigned long flags
);
221 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
223 #ifdef CONFIG_HUGETLB_PAGE
225 #define HSTATE_NAME_LEN 32
226 /* Defines one hugetlb page size */
228 int next_nid_to_alloc
;
229 int next_nid_to_free
;
232 unsigned long max_huge_pages
;
233 unsigned long nr_huge_pages
;
234 unsigned long free_huge_pages
;
235 unsigned long resv_huge_pages
;
236 unsigned long surplus_huge_pages
;
237 unsigned long nr_overcommit_huge_pages
;
238 struct list_head hugepage_activelist
;
239 struct list_head hugepage_freelists
[MAX_NUMNODES
];
240 unsigned int nr_huge_pages_node
[MAX_NUMNODES
];
241 unsigned int free_huge_pages_node
[MAX_NUMNODES
];
242 unsigned int surplus_huge_pages_node
[MAX_NUMNODES
];
243 #ifdef CONFIG_CGROUP_HUGETLB
244 /* cgroup control files */
245 struct cftype cgroup_files
[5];
247 char name
[HSTATE_NAME_LEN
];
250 struct huge_bootmem_page
{
251 struct list_head list
;
252 struct hstate
*hstate
;
253 #ifdef CONFIG_HIGHMEM
258 struct page
*alloc_huge_page_node(struct hstate
*h
, int nid
);
261 int __init
alloc_bootmem_huge_page(struct hstate
*h
);
263 void __init
hugetlb_add_hstate(unsigned order
);
264 struct hstate
*size_to_hstate(unsigned long size
);
266 #ifndef HUGE_MAX_HSTATE
267 #define HUGE_MAX_HSTATE 1
270 extern struct hstate hstates
[HUGE_MAX_HSTATE
];
271 extern unsigned int default_hstate_idx
;
273 #define default_hstate (hstates[default_hstate_idx])
275 static inline struct hstate
*hstate_inode(struct inode
*i
)
277 struct hugetlbfs_sb_info
*hsb
;
278 hsb
= HUGETLBFS_SB(i
->i_sb
);
282 static inline struct hstate
*hstate_file(struct file
*f
)
284 return hstate_inode(f
->f_dentry
->d_inode
);
287 static inline struct hstate
*hstate_vma(struct vm_area_struct
*vma
)
289 return hstate_file(vma
->vm_file
);
292 static inline unsigned long huge_page_size(struct hstate
*h
)
294 return (unsigned long)PAGE_SIZE
<< h
->order
;
297 extern unsigned long vma_kernel_pagesize(struct vm_area_struct
*vma
);
299 extern unsigned long vma_mmu_pagesize(struct vm_area_struct
*vma
);
301 static inline unsigned long huge_page_mask(struct hstate
*h
)
306 static inline unsigned int huge_page_order(struct hstate
*h
)
311 static inline unsigned huge_page_shift(struct hstate
*h
)
313 return h
->order
+ PAGE_SHIFT
;
316 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
318 return 1 << h
->order
;
321 static inline unsigned int blocks_per_huge_page(struct hstate
*h
)
323 return huge_page_size(h
) / 512;
326 #include <asm/hugetlb.h>
328 #ifndef arch_make_huge_pte
329 static inline pte_t
arch_make_huge_pte(pte_t entry
, struct vm_area_struct
*vma
,
330 struct page
*page
, int writable
)
336 static inline struct hstate
*page_hstate(struct page
*page
)
338 return size_to_hstate(PAGE_SIZE
<< compound_order(page
));
341 static inline unsigned hstate_index_to_shift(unsigned index
)
343 return hstates
[index
].order
+ PAGE_SHIFT
;
346 static inline int hstate_index(struct hstate
*h
)
353 #define alloc_huge_page_node(h, nid) NULL
354 #define alloc_bootmem_huge_page(h) NULL
355 #define hstate_file(f) NULL
356 #define hstate_vma(v) NULL
357 #define hstate_inode(i) NULL
358 #define huge_page_size(h) PAGE_SIZE
359 #define huge_page_mask(h) PAGE_MASK
360 #define vma_kernel_pagesize(v) PAGE_SIZE
361 #define vma_mmu_pagesize(v) PAGE_SIZE
362 #define huge_page_order(h) 0
363 #define huge_page_shift(h) PAGE_SHIFT
364 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
368 #define hstate_index_to_shift(index) 0
369 #define hstate_index(h) 0
372 #endif /* _LINUX_HUGETLB_H */