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
);
34 int PageHeadHuge(struct page
*page_head
);
36 void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
);
37 int hugetlb_sysctl_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
38 int hugetlb_overcommit_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
39 int hugetlb_treat_movable_handler(struct ctl_table
*, int, void __user
*, size_t *, loff_t
*);
42 int hugetlb_mempolicy_sysctl_handler(struct ctl_table
*, int,
43 void __user
*, size_t *, loff_t
*);
46 int copy_hugetlb_page_range(struct mm_struct
*, struct mm_struct
*, struct vm_area_struct
*);
47 long follow_hugetlb_page(struct mm_struct
*, struct vm_area_struct
*,
48 struct page
**, struct vm_area_struct
**,
49 unsigned long *, unsigned long *, long, unsigned int);
50 void unmap_hugepage_range(struct vm_area_struct
*,
51 unsigned long, unsigned long, struct page
*);
52 void __unmap_hugepage_range_final(struct mmu_gather
*tlb
,
53 struct vm_area_struct
*vma
,
54 unsigned long start
, unsigned long end
,
55 struct page
*ref_page
);
56 void __unmap_hugepage_range(struct mmu_gather
*tlb
, struct vm_area_struct
*vma
,
57 unsigned long start
, unsigned long end
,
58 struct page
*ref_page
);
59 void hugetlb_report_meminfo(struct seq_file
*);
60 int hugetlb_report_node_meminfo(int, char *);
61 void hugetlb_show_meminfo(void);
62 unsigned long hugetlb_total_pages(void);
63 int hugetlb_fault(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
64 unsigned long address
, unsigned int flags
);
65 int hugetlb_reserve_pages(struct inode
*inode
, long from
, long to
,
66 struct vm_area_struct
*vma
,
68 void hugetlb_unreserve_pages(struct inode
*inode
, long offset
, long freed
);
69 int dequeue_hwpoisoned_huge_page(struct page
*page
);
70 bool isolate_huge_page(struct page
*page
, struct list_head
*list
);
71 void putback_active_hugepage(struct page
*page
);
72 bool is_hugepage_active(struct page
*page
);
74 #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE
75 pte_t
*huge_pmd_share(struct mm_struct
*mm
, unsigned long addr
, pud_t
*pud
);
78 extern unsigned long hugepages_treat_as_movable
;
79 extern const unsigned long hugetlb_zero
, hugetlb_infinity
;
80 extern int sysctl_hugetlb_shm_group
;
81 extern struct list_head huge_boot_pages
;
85 pte_t
*huge_pte_alloc(struct mm_struct
*mm
,
86 unsigned long addr
, unsigned long sz
);
87 pte_t
*huge_pte_offset(struct mm_struct
*mm
, unsigned long addr
);
88 int huge_pmd_unshare(struct mm_struct
*mm
, unsigned long *addr
, pte_t
*ptep
);
89 struct page
*follow_huge_addr(struct mm_struct
*mm
, unsigned long address
,
91 struct page
*follow_huge_pmd(struct mm_struct
*mm
, unsigned long address
,
92 pmd_t
*pmd
, int write
);
93 struct page
*follow_huge_pud(struct mm_struct
*mm
, unsigned long address
,
94 pud_t
*pud
, int write
);
95 int pmd_huge(pmd_t pmd
);
96 int pud_huge(pud_t pmd
);
97 unsigned long hugetlb_change_protection(struct vm_area_struct
*vma
,
98 unsigned long address
, unsigned long end
, pgprot_t newprot
);
100 #else /* !CONFIG_HUGETLB_PAGE */
102 static inline int PageHuge(struct page
*page
)
107 static inline int PageHeadHuge(struct page
*page_head
)
112 static inline void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
)
116 static inline unsigned long hugetlb_total_pages(void)
121 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
122 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
123 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
124 static inline void hugetlb_report_meminfo(struct seq_file
*m
)
127 #define hugetlb_report_node_meminfo(n, buf) 0
128 static inline void hugetlb_show_meminfo(void)
131 #define follow_huge_pmd(mm, addr, pmd, write) NULL
132 #define follow_huge_pud(mm, addr, pud, write) NULL
133 #define prepare_hugepage_range(file, addr, len) (-EINVAL)
134 #define pmd_huge(x) 0
135 #define pud_huge(x) 0
136 #define is_hugepage_only_range(mm, addr, len) 0
137 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
138 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
139 #define huge_pte_offset(mm, address) 0
140 static inline int dequeue_hwpoisoned_huge_page(struct page
*page
)
145 static inline bool isolate_huge_page(struct page
*page
, struct list_head
*list
)
149 #define putback_active_hugepage(p) do {} while (0)
150 #define is_hugepage_active(x) false
152 static inline unsigned long hugetlb_change_protection(struct vm_area_struct
*vma
,
153 unsigned long address
, unsigned long end
, pgprot_t newprot
)
158 static inline void __unmap_hugepage_range_final(struct mmu_gather
*tlb
,
159 struct vm_area_struct
*vma
, unsigned long start
,
160 unsigned long end
, struct page
*ref_page
)
165 static inline void __unmap_hugepage_range(struct mmu_gather
*tlb
,
166 struct vm_area_struct
*vma
, unsigned long start
,
167 unsigned long end
, struct page
*ref_page
)
172 #endif /* !CONFIG_HUGETLB_PAGE */
174 #define HUGETLB_ANON_FILE "anon_hugepage"
178 * The file will be used as an shm file so shmfs accounting rules
181 HUGETLB_SHMFS_INODE
= 1,
183 * The file is being created on the internal vfs mount and shmfs
184 * accounting rules do not apply
186 HUGETLB_ANONHUGE_INODE
= 2,
189 #ifdef CONFIG_HUGETLBFS
190 struct hugetlbfs_sb_info
{
191 long max_inodes
; /* inodes allowed */
192 long free_inodes
; /* inodes free */
193 spinlock_t stat_lock
;
194 struct hstate
*hstate
;
195 struct hugepage_subpool
*spool
;
198 static inline struct hugetlbfs_sb_info
*HUGETLBFS_SB(struct super_block
*sb
)
200 return sb
->s_fs_info
;
203 extern const struct file_operations hugetlbfs_file_operations
;
204 extern const struct vm_operations_struct hugetlb_vm_ops
;
205 struct file
*hugetlb_file_setup(const char *name
, size_t size
, vm_flags_t acct
,
206 struct user_struct
**user
, int creat_flags
,
209 static inline int is_file_hugepages(struct file
*file
)
211 if (file
->f_op
== &hugetlbfs_file_operations
)
213 if (is_file_shm_hugepages(file
))
220 #else /* !CONFIG_HUGETLBFS */
222 #define is_file_hugepages(file) 0
223 static inline struct file
*
224 hugetlb_file_setup(const char *name
, size_t size
, vm_flags_t acctflag
,
225 struct user_struct
**user
, int creat_flags
,
228 return ERR_PTR(-ENOSYS
);
231 #endif /* !CONFIG_HUGETLBFS */
233 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
234 unsigned long hugetlb_get_unmapped_area(struct file
*file
, unsigned long addr
,
235 unsigned long len
, unsigned long pgoff
,
236 unsigned long flags
);
237 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
239 #ifdef CONFIG_HUGETLB_PAGE
241 #define HSTATE_NAME_LEN 32
242 /* Defines one hugetlb page size */
244 int next_nid_to_alloc
;
245 int next_nid_to_free
;
248 unsigned long max_huge_pages
;
249 unsigned long nr_huge_pages
;
250 unsigned long free_huge_pages
;
251 unsigned long resv_huge_pages
;
252 unsigned long surplus_huge_pages
;
253 unsigned long nr_overcommit_huge_pages
;
254 struct list_head hugepage_activelist
;
255 struct list_head hugepage_freelists
[MAX_NUMNODES
];
256 unsigned int nr_huge_pages_node
[MAX_NUMNODES
];
257 unsigned int free_huge_pages_node
[MAX_NUMNODES
];
258 unsigned int surplus_huge_pages_node
[MAX_NUMNODES
];
259 #ifdef CONFIG_CGROUP_HUGETLB
260 /* cgroup control files */
261 struct cftype cgroup_files
[5];
263 char name
[HSTATE_NAME_LEN
];
266 struct huge_bootmem_page
{
267 struct list_head list
;
268 struct hstate
*hstate
;
269 #ifdef CONFIG_HIGHMEM
274 struct page
*alloc_huge_page_node(struct hstate
*h
, int nid
);
275 struct page
*alloc_huge_page_noerr(struct vm_area_struct
*vma
,
276 unsigned long addr
, int avoid_reserve
);
279 int __init
alloc_bootmem_huge_page(struct hstate
*h
);
281 void __init
hugetlb_add_hstate(unsigned order
);
282 struct hstate
*size_to_hstate(unsigned long size
);
284 #ifndef HUGE_MAX_HSTATE
285 #define HUGE_MAX_HSTATE 1
288 extern struct hstate hstates
[HUGE_MAX_HSTATE
];
289 extern unsigned int default_hstate_idx
;
291 #define default_hstate (hstates[default_hstate_idx])
293 static inline struct hstate
*hstate_inode(struct inode
*i
)
295 struct hugetlbfs_sb_info
*hsb
;
296 hsb
= HUGETLBFS_SB(i
->i_sb
);
300 static inline struct hstate
*hstate_file(struct file
*f
)
302 return hstate_inode(file_inode(f
));
305 static inline struct hstate
*hstate_sizelog(int page_size_log
)
308 return &default_hstate
;
309 return size_to_hstate(1 << page_size_log
);
312 static inline struct hstate
*hstate_vma(struct vm_area_struct
*vma
)
314 return hstate_file(vma
->vm_file
);
317 static inline unsigned long huge_page_size(struct hstate
*h
)
319 return (unsigned long)PAGE_SIZE
<< h
->order
;
322 extern unsigned long vma_kernel_pagesize(struct vm_area_struct
*vma
);
324 extern unsigned long vma_mmu_pagesize(struct vm_area_struct
*vma
);
326 static inline unsigned long huge_page_mask(struct hstate
*h
)
331 static inline unsigned int huge_page_order(struct hstate
*h
)
336 static inline unsigned huge_page_shift(struct hstate
*h
)
338 return h
->order
+ PAGE_SHIFT
;
341 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
343 return 1 << h
->order
;
346 static inline unsigned int blocks_per_huge_page(struct hstate
*h
)
348 return huge_page_size(h
) / 512;
351 #include <asm/hugetlb.h>
353 #ifndef arch_make_huge_pte
354 static inline pte_t
arch_make_huge_pte(pte_t entry
, struct vm_area_struct
*vma
,
355 struct page
*page
, int writable
)
361 static inline struct hstate
*page_hstate(struct page
*page
)
363 return size_to_hstate(PAGE_SIZE
<< compound_order(page
));
366 static inline unsigned hstate_index_to_shift(unsigned index
)
368 return hstates
[index
].order
+ PAGE_SHIFT
;
371 static inline int hstate_index(struct hstate
*h
)
376 pgoff_t
__basepage_index(struct page
*page
);
378 /* Return page->index in PAGE_SIZE units */
379 static inline pgoff_t
basepage_index(struct page
*page
)
381 if (!PageCompound(page
))
384 return __basepage_index(page
);
387 extern void dissolve_free_huge_pages(unsigned long start_pfn
,
388 unsigned long end_pfn
);
389 int pmd_huge_support(void);
391 * Currently hugepage migration is enabled only for pmd-based hugepage.
392 * This function will be updated when hugepage migration is more widely
395 static inline int hugepage_migration_support(struct hstate
*h
)
397 return pmd_huge_support() && (huge_page_shift(h
) == PMD_SHIFT
);
400 static inline spinlock_t
*huge_pte_lockptr(struct hstate
*h
,
401 struct mm_struct
*mm
, pte_t
*pte
)
403 if (huge_page_size(h
) == PMD_SIZE
)
404 return pmd_lockptr(mm
, (pmd_t
*) pte
);
405 VM_BUG_ON(huge_page_size(h
) == PAGE_SIZE
);
406 return &mm
->page_table_lock
;
409 #else /* CONFIG_HUGETLB_PAGE */
411 #define alloc_huge_page_node(h, nid) NULL
412 #define alloc_huge_page_noerr(v, a, r) NULL
413 #define alloc_bootmem_huge_page(h) NULL
414 #define hstate_file(f) NULL
415 #define hstate_sizelog(s) NULL
416 #define hstate_vma(v) NULL
417 #define hstate_inode(i) NULL
418 #define page_hstate(page) NULL
419 #define huge_page_size(h) PAGE_SIZE
420 #define huge_page_mask(h) PAGE_MASK
421 #define vma_kernel_pagesize(v) PAGE_SIZE
422 #define vma_mmu_pagesize(v) PAGE_SIZE
423 #define huge_page_order(h) 0
424 #define huge_page_shift(h) PAGE_SHIFT
425 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
429 #define hstate_index_to_shift(index) 0
430 #define hstate_index(h) 0
432 static inline pgoff_t
basepage_index(struct page
*page
)
436 #define dissolve_free_huge_pages(s, e) do {} while (0)
437 #define pmd_huge_support() 0
438 #define hugepage_migration_support(h) 0
440 static inline spinlock_t
*huge_pte_lockptr(struct hstate
*h
,
441 struct mm_struct
*mm
, pte_t
*pte
)
443 return &mm
->page_table_lock
;
445 #endif /* CONFIG_HUGETLB_PAGE */
447 static inline spinlock_t
*huge_pte_lock(struct hstate
*h
,
448 struct mm_struct
*mm
, pte_t
*pte
)
452 ptl
= huge_pte_lockptr(h
, mm
, pte
);
457 #endif /* _LINUX_HUGETLB_H */