hugetlb.h 9.6 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
#ifndef _LINUX_HUGETLB_H
#define _LINUX_HUGETLB_H

L
Linus Torvalds 已提交
4
#include <linux/mm_types.h>
A
Alexey Dobriyan 已提交
5
#include <linux/fs.h>
6
#include <linux/hugetlb_inline.h>
7
#include <linux/cgroup.h>
A
Alexey Dobriyan 已提交
8

9 10
struct ctl_table;
struct user_struct;
11
struct mmu_gather;
12

L
Linus Torvalds 已提交
13 14 15
#ifdef CONFIG_HUGETLB_PAGE

#include <linux/mempolicy.h>
16
#include <linux/shm.h>
D
David Gibson 已提交
17
#include <asm/tlbflush.h>
L
Linus Torvalds 已提交
18

19 20 21 22 23 24
struct hugepage_subpool {
	spinlock_t lock;
	long count;
	long max_hpages, used_hpages;
};

25 26 27 28 29
extern spinlock_t hugetlb_lock;
extern int hugetlb_max_hstate __read_mostly;
#define for_each_hstate(h) \
	for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)

30 31 32
struct hugepage_subpool *hugepage_new_subpool(long nr_blocks);
void hugepage_put_subpool(struct hugepage_subpool *spool);

33 34
int PageHuge(struct page *page);

35
void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
36 37 38
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 *);
39 40 41 42 43 44

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

L
Linus Torvalds 已提交
45
int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
H
Hugh Dickins 已提交
46 47 48
int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
			struct page **, struct vm_area_struct **,
			unsigned long *, int *, int, unsigned int flags);
49
void unmap_hugepage_range(struct vm_area_struct *,
50 51 52 53
			  unsigned long, unsigned long, struct page *);
void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
				unsigned long start, unsigned long end,
				struct page *ref_page);
L
Linus Torvalds 已提交
54
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
55
void hugetlb_report_meminfo(struct seq_file *);
L
Linus Torvalds 已提交
56 57
int hugetlb_report_node_meminfo(int, char *);
unsigned long hugetlb_total_pages(void);
58
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
59
			unsigned long address, unsigned int flags);
60
int hugetlb_reserve_pages(struct inode *inode, long from, long to,
61
						struct vm_area_struct *vma,
62
						vm_flags_t vm_flags);
63
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
64
int dequeue_hwpoisoned_huge_page(struct page *page);
65
void copy_huge_page(struct page *dst, struct page *src);
L
Linus Torvalds 已提交
66

67
extern unsigned long hugepages_treat_as_movable;
L
Linus Torvalds 已提交
68 69
extern const unsigned long hugetlb_zero, hugetlb_infinity;
extern int sysctl_hugetlb_shm_group;
70
extern struct list_head huge_boot_pages;
L
Linus Torvalds 已提交
71

D
David Gibson 已提交
72 73
/* arch callbacks */

74 75
pte_t *huge_pte_alloc(struct mm_struct *mm,
			unsigned long addr, unsigned long sz);
D
David Gibson 已提交
76
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
77
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
D
David Gibson 已提交
78 79 80 81
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);
A
Andi Kleen 已提交
82 83
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
				pud_t *pud, int write);
D
David Gibson 已提交
84
int pmd_huge(pmd_t pmd);
A
Andi Kleen 已提交
85
int pud_huge(pud_t pmd);
86 87
void hugetlb_change_protection(struct vm_area_struct *vma,
		unsigned long address, unsigned long end, pgprot_t newprot);
D
David Gibson 已提交
88

L
Linus Torvalds 已提交
89 90
#else /* !CONFIG_HUGETLB_PAGE */

91 92 93 94 95
static inline int PageHuge(struct page *page)
{
	return 0;
}

96 97 98 99
static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
{
}

L
Linus Torvalds 已提交
100 101 102 103 104
static inline unsigned long hugetlb_total_pages(void)
{
	return 0;
}

105
#define follow_hugetlb_page(m,v,p,vs,a,b,i,w)	({ BUG(); 0; })
L
Linus Torvalds 已提交
106 107 108
#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; })
109 110 111
static inline void hugetlb_report_meminfo(struct seq_file *m)
{
}
L
Linus Torvalds 已提交
112 113
#define hugetlb_report_node_meminfo(n, buf)	0
#define follow_huge_pmd(mm, addr, pmd, write)	NULL
A
Andi Kleen 已提交
114
#define follow_huge_pud(mm, addr, pud, write)	NULL
115
#define prepare_hugepage_range(file, addr, len)	(-EINVAL)
L
Linus Torvalds 已提交
116
#define pmd_huge(x)	0
A
Andi Kleen 已提交
117
#define pud_huge(x)	0
L
Linus Torvalds 已提交
118
#define is_hugepage_only_range(mm, addr, len)	0
119
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
120
#define hugetlb_fault(mm, vma, addr, flags)	({ BUG(); 0; })
121
#define huge_pte_offset(mm, address)	0
122 123 124 125 126
static inline int dequeue_hwpoisoned_huge_page(struct page *page)
{
	return 0;
}

127 128 129
static inline void copy_huge_page(struct page *dst, struct page *src)
{
}
L
Linus Torvalds 已提交
130

131 132
#define hugetlb_change_protection(vma, address, end, newprot)

133 134 135 136 137 138 139
static inline void __unmap_hugepage_range(struct mmu_gather *tlb,
			struct vm_area_struct *vma, unsigned long start,
			unsigned long end, struct page *ref_page)
{
	BUG();
}

L
Linus Torvalds 已提交
140 141
#endif /* !CONFIG_HUGETLB_PAGE */

142 143
#define HUGETLB_ANON_FILE "anon_hugepage"

144 145 146 147 148 149
enum {
	/*
	 * The file will be used as an shm file so shmfs accounting rules
	 * apply
	 */
	HUGETLB_SHMFS_INODE     = 1,
150 151 152 153 154
	/*
	 * The file is being created on the internal vfs mount and shmfs
	 * accounting rules do not apply
	 */
	HUGETLB_ANONHUGE_INODE  = 2,
155 156
};

L
Linus Torvalds 已提交
157 158 159 160 161
#ifdef CONFIG_HUGETLBFS
struct hugetlbfs_sb_info {
	long	max_inodes;   /* inodes allowed */
	long	free_inodes;  /* inodes free */
	spinlock_t	stat_lock;
162
	struct hstate *hstate;
163
	struct hugepage_subpool *spool;
L
Linus Torvalds 已提交
164 165 166 167 168 169 170
};

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

171
extern const struct file_operations hugetlbfs_file_operations;
172
extern const struct vm_operations_struct hugetlb_vm_ops;
173 174
struct file *hugetlb_file_setup(const char *name, unsigned long addr,
				size_t size, vm_flags_t acct,
175
				struct user_struct **user, int creat_flags);
L
Linus Torvalds 已提交
176 177 178

static inline int is_file_hugepages(struct file *file)
{
179 180 181 182 183 184
	if (file->f_op == &hugetlbfs_file_operations)
		return 1;
	if (is_file_shm_hugepages(file))
		return 1;

	return 0;
L
Linus Torvalds 已提交
185 186 187 188
}

#else /* !CONFIG_HUGETLBFS */

189
#define is_file_hugepages(file)			0
190 191
static inline struct file *
hugetlb_file_setup(const char *name, unsigned long addr, size_t size,
192
		vm_flags_t acctflag, struct user_struct **user, int creat_flags)
193 194 195
{
	return ERR_PTR(-ENOSYS);
}
L
Linus Torvalds 已提交
196 197 198

#endif /* !CONFIG_HUGETLBFS */

199 200 201 202 203 204
#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 */

205 206
#ifdef CONFIG_HUGETLB_PAGE

207
#define HSTATE_NAME_LEN 32
208 209
/* Defines one hugetlb page size */
struct hstate {
210 211
	int next_nid_to_alloc;
	int next_nid_to_free;
212 213 214 215 216 217 218 219
	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;
220
	struct list_head hugepage_activelist;
221 222 223 224
	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];
225 226 227 228
#ifdef CONFIG_CGROUP_HUGETLB
	/* cgroup control files */
	struct cftype cgroup_files[5];
#endif
229
	char name[HSTATE_NAME_LEN];
230 231
};

232 233 234
struct huge_bootmem_page {
	struct list_head list;
	struct hstate *hstate;
235 236 237
#ifdef CONFIG_HIGHMEM
	phys_addr_t phys;
#endif
238 239
};

240 241
struct page *alloc_huge_page_node(struct hstate *h, int nid);

242 243 244
/* arch callback */
int __init alloc_bootmem_huge_page(struct hstate *h);

245 246 247 248 249 250 251 252 253 254 255
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])
256

257
static inline struct hstate *hstate_inode(struct inode *i)
258
{
259 260 261
	struct hugetlbfs_sb_info *hsb;
	hsb = HUGETLBFS_SB(i->i_sb);
	return hsb->hstate;
262 263 264 265
}

static inline struct hstate *hstate_file(struct file *f)
{
266
	return hstate_inode(f->f_dentry->d_inode);
267 268
}

269
static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
270
{
271
	return hstate_file(vma->vm_file);
272 273 274 275 276 277 278
}

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

279 280
extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);

281 282
extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);

283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309
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>

310 311 312 313 314 315 316 317
#ifndef arch_make_huge_pte
static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
				       struct page *page, int writable)
{
	return entry;
}
#endif

318 319 320 321 322
static inline struct hstate *page_hstate(struct page *page)
{
	return size_to_hstate(PAGE_SIZE << compound_order(page));
}

323 324 325 326 327
static inline unsigned hstate_index_to_shift(unsigned index)
{
	return hstates[index].order + PAGE_SHIFT;
}

328 329 330 331 332
static inline int hstate_index(struct hstate *h)
{
	return h - hstates;
}

333 334
#else
struct hstate {};
335
#define alloc_huge_page_node(h, nid) NULL
336
#define alloc_bootmem_huge_page(h) NULL
337 338 339 340 341
#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
342
#define vma_kernel_pagesize(v) PAGE_SIZE
343
#define vma_mmu_pagesize(v) PAGE_SIZE
344 345
#define huge_page_order(h) 0
#define huge_page_shift(h) PAGE_SHIFT
346 347 348 349
static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1;
}
350
#define hstate_index_to_shift(index) 0
351
#define hstate_index(h) 0
352 353
#endif

L
Linus Torvalds 已提交
354
#endif /* _LINUX_HUGETLB_H */