hugetlb.h 9.1 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1
2
3
#ifndef _LINUX_HUGETLB_H
#define _LINUX_HUGETLB_H

Alexey Dobriyan's avatar
Alexey Dobriyan committed
4
#include <linux/fs.h>
5
#include <linux/hugetlb_inline.h>
Alexey Dobriyan's avatar
Alexey Dobriyan committed
6

7
8
9
struct ctl_table;
struct user_struct;

Linus Torvalds's avatar
Linus Torvalds committed
10
11
12
#ifdef CONFIG_HUGETLB_PAGE

#include <linux/mempolicy.h>
13
#include <linux/shm.h>
David Gibson's avatar
David Gibson committed
14
#include <asm/tlbflush.h>
Linus Torvalds's avatar
Linus Torvalds committed
15

16
17
int PageHuge(struct page *page);

18
void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
19
20
21
int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
22
23
24
25
26
27

#ifdef CONFIG_NUMA
int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
					void __user *, size_t *, loff_t *);
#endif

Linus Torvalds's avatar
Linus Torvalds committed
28
int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
Hugh Dickins's avatar
Hugh Dickins committed
29
30
31
int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
			struct page **, struct vm_area_struct **,
			unsigned long *, int *, int, unsigned int flags);
32
33
34
35
void unmap_hugepage_range(struct vm_area_struct *,
			unsigned long, unsigned long, struct page *);
void __unmap_hugepage_range(struct vm_area_struct *,
			unsigned long, unsigned long, struct page *);
Linus Torvalds's avatar
Linus Torvalds committed
36
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
37
void hugetlb_report_meminfo(struct seq_file *);
Linus Torvalds's avatar
Linus Torvalds committed
38
39
int hugetlb_report_node_meminfo(int, char *);
unsigned long hugetlb_total_pages(void);
40
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
41
			unsigned long address, unsigned int flags);
42
int hugetlb_reserve_pages(struct inode *inode, long from, long to,
43
44
						struct vm_area_struct *vma,
						int acctflags);
45
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
46
int dequeue_hwpoisoned_huge_page(struct page *page);
47
void copy_huge_page(struct page *dst, struct page *src);
Linus Torvalds's avatar
Linus Torvalds committed
48

49
extern unsigned long hugepages_treat_as_movable;
Linus Torvalds's avatar
Linus Torvalds committed
50
51
extern const unsigned long hugetlb_zero, hugetlb_infinity;
extern int sysctl_hugetlb_shm_group;
52
extern struct list_head huge_boot_pages;
Linus Torvalds's avatar
Linus Torvalds committed
53

David Gibson's avatar
David Gibson committed
54
55
/* arch callbacks */

56
57
pte_t *huge_pte_alloc(struct mm_struct *mm,
			unsigned long addr, unsigned long sz);
David Gibson's avatar
David Gibson committed
58
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
59
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
David Gibson's avatar
David Gibson committed
60
61
62
63
struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
			      int write);
struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
				pmd_t *pmd, int write);
Andi Kleen's avatar
Andi Kleen committed
64
65
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
				pud_t *pud, int write);
David Gibson's avatar
David Gibson committed
66
int pmd_huge(pmd_t pmd);
Andi Kleen's avatar
Andi Kleen committed
67
int pud_huge(pud_t pmd);
68
69
void hugetlb_change_protection(struct vm_area_struct *vma,
		unsigned long address, unsigned long end, pgprot_t newprot);
David Gibson's avatar
David Gibson committed
70

Linus Torvalds's avatar
Linus Torvalds committed
71
72
#else /* !CONFIG_HUGETLB_PAGE */

73
74
75
76
77
static inline int PageHuge(struct page *page)
{
	return 0;
}

78
79
80
81
static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
{
}

Linus Torvalds's avatar
Linus Torvalds committed
82
83
84
85
86
static inline unsigned long hugetlb_total_pages(void)
{
	return 0;
}

87
#define follow_hugetlb_page(m,v,p,vs,a,b,i,w)	({ BUG(); 0; })
Linus Torvalds's avatar
Linus Torvalds committed
88
89
90
#define follow_huge_addr(mm, addr, write)	ERR_PTR(-EINVAL)
#define copy_hugetlb_page_range(src, dst, vma)	({ BUG(); 0; })
#define hugetlb_prefault(mapping, vma)		({ BUG(); 0; })
91
#define unmap_hugepage_range(vma, start, end, page)	BUG()
92
93
94
static inline void hugetlb_report_meminfo(struct seq_file *m)
{
}
Linus Torvalds's avatar
Linus Torvalds committed
95
96
#define hugetlb_report_node_meminfo(n, buf)	0
#define follow_huge_pmd(mm, addr, pmd, write)	NULL
Andi Kleen's avatar
Andi Kleen committed
97
#define follow_huge_pud(mm, addr, pud, write)	NULL
98
#define prepare_hugepage_range(file, addr, len)	(-EINVAL)
Linus Torvalds's avatar
Linus Torvalds committed
99
#define pmd_huge(x)	0
Andi Kleen's avatar
Andi Kleen committed
100
#define pud_huge(x)	0
Linus Torvalds's avatar
Linus Torvalds committed
101
#define is_hugepage_only_range(mm, addr, len)	0
102
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
103
#define hugetlb_fault(mm, vma, addr, flags)	({ BUG(); 0; })
104
#define huge_pte_offset(mm, address)	0
105
#define dequeue_hwpoisoned_huge_page(page)	0
106
107
108
static inline void copy_huge_page(struct page *dst, struct page *src)
{
}
Linus Torvalds's avatar
Linus Torvalds committed
109

110
111
#define hugetlb_change_protection(vma, address, end, newprot)

Linus Torvalds's avatar
Linus Torvalds committed
112
#ifndef HPAGE_MASK
113
114
#define HPAGE_MASK	PAGE_MASK		/* Keep the compiler happy */
#define HPAGE_SIZE	PAGE_SIZE
Linus Torvalds's avatar
Linus Torvalds committed
115
116
117
118
#endif

#endif /* !CONFIG_HUGETLB_PAGE */

119
120
#define HUGETLB_ANON_FILE "anon_hugepage"

121
122
123
124
125
126
enum {
	/*
	 * The file will be used as an shm file so shmfs accounting rules
	 * apply
	 */
	HUGETLB_SHMFS_INODE     = 1,
127
128
129
130
131
	/*
	 * The file is being created on the internal vfs mount and shmfs
	 * accounting rules do not apply
	 */
	HUGETLB_ANONHUGE_INODE  = 2,
132
133
};

Linus Torvalds's avatar
Linus Torvalds committed
134
135
136
137
138
139
140
#ifdef CONFIG_HUGETLBFS
struct hugetlbfs_config {
	uid_t   uid;
	gid_t   gid;
	umode_t mode;
	long	nr_blocks;
	long	nr_inodes;
141
	struct hstate *hstate;
Linus Torvalds's avatar
Linus Torvalds committed
142
143
144
145
146
147
148
149
};

struct hugetlbfs_sb_info {
	long	max_blocks;   /* blocks allowed */
	long	free_blocks;  /* blocks free */
	long	max_inodes;   /* inodes allowed */
	long	free_inodes;  /* inodes free */
	spinlock_t	stat_lock;
150
	struct hstate *hstate;
Linus Torvalds's avatar
Linus Torvalds committed
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
};


struct hugetlbfs_inode_info {
	struct shared_policy policy;
	struct inode vfs_inode;
};

static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
{
	return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
}

static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

169
extern const struct file_operations hugetlbfs_file_operations;
170
extern const struct vm_operations_struct hugetlb_vm_ops;
171
struct file *hugetlb_file_setup(const char *name, size_t size, int acct,
172
				struct user_struct **user, int creat_flags);
173
174
int hugetlb_get_quota(struct address_space *mapping, long delta);
void hugetlb_put_quota(struct address_space *mapping, long delta);
Linus Torvalds's avatar
Linus Torvalds committed
175
176
177

static inline int is_file_hugepages(struct file *file)
{
178
179
180
181
182
183
	if (file->f_op == &hugetlbfs_file_operations)
		return 1;
	if (is_file_shm_hugepages(file))
		return 1;

	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
184
185
186
187
188
189
190
191
}

static inline void set_file_hugepages(struct file *file)
{
	file->f_op = &hugetlbfs_file_operations;
}
#else /* !CONFIG_HUGETLBFS */

192
193
#define is_file_hugepages(file)			0
#define set_file_hugepages(file)		BUG()
194
195
196
197
198
static inline struct file *hugetlb_file_setup(const char *name, size_t size,
		int acctflag, struct user_struct **user, int creat_flags)
{
	return ERR_PTR(-ENOSYS);
}
Linus Torvalds's avatar
Linus Torvalds committed
199
200
201

#endif /* !CONFIG_HUGETLBFS */

202
203
204
205
206
207
#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
					unsigned long len, unsigned long pgoff,
					unsigned long flags);
#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */

208
209
#ifdef CONFIG_HUGETLB_PAGE

210
#define HSTATE_NAME_LEN 32
211
212
/* Defines one hugetlb page size */
struct hstate {
213
214
	int next_nid_to_alloc;
	int next_nid_to_free;
215
216
217
218
219
220
221
222
223
224
225
226
	unsigned int order;
	unsigned long mask;
	unsigned long max_huge_pages;
	unsigned long nr_huge_pages;
	unsigned long free_huge_pages;
	unsigned long resv_huge_pages;
	unsigned long surplus_huge_pages;
	unsigned long nr_overcommit_huge_pages;
	struct list_head hugepage_freelists[MAX_NUMNODES];
	unsigned int nr_huge_pages_node[MAX_NUMNODES];
	unsigned int free_huge_pages_node[MAX_NUMNODES];
	unsigned int surplus_huge_pages_node[MAX_NUMNODES];
227
	char name[HSTATE_NAME_LEN];
228
229
};

230
231
232
233
234
struct huge_bootmem_page {
	struct list_head list;
	struct hstate *hstate;
};

235
236
struct page *alloc_huge_page_node(struct hstate *h, int nid);

237
238
239
/* arch callback */
int __init alloc_bootmem_huge_page(struct hstate *h);

240
241
242
243
244
245
246
247
248
249
250
void __init hugetlb_add_hstate(unsigned order);
struct hstate *size_to_hstate(unsigned long size);

#ifndef HUGE_MAX_HSTATE
#define HUGE_MAX_HSTATE 1
#endif

extern struct hstate hstates[HUGE_MAX_HSTATE];
extern unsigned int default_hstate_idx;

#define default_hstate (hstates[default_hstate_idx])
251

252
static inline struct hstate *hstate_inode(struct inode *i)
253
{
254
255
256
	struct hugetlbfs_sb_info *hsb;
	hsb = HUGETLBFS_SB(i->i_sb);
	return hsb->hstate;
257
258
259
260
}

static inline struct hstate *hstate_file(struct file *f)
{
261
	return hstate_inode(f->f_dentry->d_inode);
262
263
}

264
static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
265
{
266
	return hstate_file(vma->vm_file);
267
268
269
270
271
272
273
}

static inline unsigned long huge_page_size(struct hstate *h)
{
	return (unsigned long)PAGE_SIZE << h->order;
}

274
275
extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);

276
277
extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);

278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
static inline unsigned long huge_page_mask(struct hstate *h)
{
	return h->mask;
}

static inline unsigned int huge_page_order(struct hstate *h)
{
	return h->order;
}

static inline unsigned huge_page_shift(struct hstate *h)
{
	return h->order + PAGE_SHIFT;
}

static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1 << h->order;
}

static inline unsigned int blocks_per_huge_page(struct hstate *h)
{
	return huge_page_size(h) / 512;
}

#include <asm/hugetlb.h>

305
306
307
308
309
static inline struct hstate *page_hstate(struct page *page)
{
	return size_to_hstate(PAGE_SIZE << compound_order(page));
}

310
311
#else
struct hstate {};
312
#define alloc_huge_page_node(h, nid) NULL
313
#define alloc_bootmem_huge_page(h) NULL
314
315
316
317
318
#define hstate_file(f) NULL
#define hstate_vma(v) NULL
#define hstate_inode(i) NULL
#define huge_page_size(h) PAGE_SIZE
#define huge_page_mask(h) PAGE_MASK
319
#define vma_kernel_pagesize(v) PAGE_SIZE
320
#define vma_mmu_pagesize(v) PAGE_SIZE
321
322
#define huge_page_order(h) 0
#define huge_page_shift(h) PAGE_SHIFT
323
324
325
326
static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1;
}
327
328
#endif

Linus Torvalds's avatar
Linus Torvalds committed
329
#endif /* _LINUX_HUGETLB_H */