hugetlb.h 9.29 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3
#ifndef _LINUX_HUGETLB_H
#define _LINUX_HUGETLB_H

Linus Torvalds's avatar
Linus Torvalds committed
4
#include <linux/mm_types.h>
Alexey Dobriyan's avatar
Alexey Dobriyan committed
5
#include <linux/fs.h>
6
#include <linux/hugetlb_inline.h>
Alexey Dobriyan's avatar
Alexey Dobriyan committed
7

8 9 10
struct ctl_table;
struct user_struct;

Linus Torvalds's avatar
Linus Torvalds committed
11 12 13
#ifdef CONFIG_HUGETLB_PAGE

#include <linux/mempolicy.h>
14
#include <linux/shm.h>
David Gibson's avatar
David Gibson committed
15
#include <asm/tlbflush.h>
Linus Torvalds's avatar
Linus Torvalds committed
16

17 18
int PageHuge(struct page *page);

19
void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
20 21 22
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 *);
23 24 25 26 27 28

#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
29
int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
Hugh Dickins's avatar
Hugh Dickins committed
30 31 32
int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
			struct page **, struct vm_area_struct **,
			unsigned long *, int *, int, unsigned int flags);
33 34 35 36
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
37
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
38
void hugetlb_report_meminfo(struct seq_file *);
Linus Torvalds's avatar
Linus Torvalds committed
39 40
int hugetlb_report_node_meminfo(int, char *);
unsigned long hugetlb_total_pages(void);
41
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
42
			unsigned long address, unsigned int flags);
43
int hugetlb_reserve_pages(struct inode *inode, long from, long to,
44
						struct vm_area_struct *vma,
45
						vm_flags_t vm_flags);
46
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
47
int dequeue_hwpoisoned_huge_page(struct page *page);
48
void copy_huge_page(struct page *dst, struct page *src);
Linus Torvalds's avatar
Linus Torvalds committed
49

50
extern unsigned long hugepages_treat_as_movable;
Linus Torvalds's avatar
Linus Torvalds committed
51 52
extern const unsigned long hugetlb_zero, hugetlb_infinity;
extern int sysctl_hugetlb_shm_group;
53
extern struct list_head huge_boot_pages;
Linus Torvalds's avatar
Linus Torvalds committed
54

David Gibson's avatar
David Gibson committed
55 56
/* arch callbacks */

57 58
pte_t *huge_pte_alloc(struct mm_struct *mm,
			unsigned long addr, unsigned long sz);
David Gibson's avatar
David Gibson committed
59
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
60
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
David Gibson's avatar
David Gibson committed
61 62 63 64
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
65 66
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
				pud_t *pud, int write);
David Gibson's avatar
David Gibson committed
67
int pmd_huge(pmd_t pmd);
Andi Kleen's avatar
Andi Kleen committed
68
int pud_huge(pud_t pmd);
69 70
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
71

Linus Torvalds's avatar
Linus Torvalds committed
72 73
#else /* !CONFIG_HUGETLB_PAGE */

74 75 76 77 78
static inline int PageHuge(struct page *page)
{
	return 0;
}

79 80 81 82
static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
{
}

Linus Torvalds's avatar
Linus Torvalds committed
83 84 85 86 87
static inline unsigned long hugetlb_total_pages(void)
{
	return 0;
}

88
#define follow_hugetlb_page(m,v,p,vs,a,b,i,w)	({ BUG(); 0; })
Linus Torvalds's avatar
Linus Torvalds committed
89 90 91
#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; })
92
#define unmap_hugepage_range(vma, start, end, page)	BUG()
93 94 95
static inline void hugetlb_report_meminfo(struct seq_file *m)
{
}
Linus Torvalds's avatar
Linus Torvalds committed
96 97
#define hugetlb_report_node_meminfo(n, buf)	0
#define follow_huge_pmd(mm, addr, pmd, write)	NULL
Andi Kleen's avatar
Andi Kleen committed
98
#define follow_huge_pud(mm, addr, pud, write)	NULL
99
#define prepare_hugepage_range(file, addr, len)	(-EINVAL)
Linus Torvalds's avatar
Linus Torvalds committed
100
#define pmd_huge(x)	0
Andi Kleen's avatar
Andi Kleen committed
101
#define pud_huge(x)	0
Linus Torvalds's avatar
Linus Torvalds committed
102
#define is_hugepage_only_range(mm, addr, len)	0
103
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
104
#define hugetlb_fault(mm, vma, addr, flags)	({ BUG(); 0; })
105
#define huge_pte_offset(mm, address)	0
106
#define dequeue_hwpoisoned_huge_page(page)	0
107 108 109
static inline void copy_huge_page(struct page *dst, struct page *src)
{
}
Linus Torvalds's avatar
Linus Torvalds committed
110

111 112
#define hugetlb_change_protection(vma, address, end, newprot)

Linus Torvalds's avatar
Linus Torvalds committed
113
#ifndef HPAGE_MASK
114 115
#define HPAGE_MASK	PAGE_MASK		/* Keep the compiler happy */
#define HPAGE_SIZE	PAGE_SIZE
Linus Torvalds's avatar
Linus Torvalds committed
116 117 118 119
#endif

#endif /* !CONFIG_HUGETLB_PAGE */

120 121
#define HUGETLB_ANON_FILE "anon_hugepage"

122 123 124 125 126 127
enum {
	/*
	 * The file will be used as an shm file so shmfs accounting rules
	 * apply
	 */
	HUGETLB_SHMFS_INODE     = 1,
128 129 130 131 132
	/*
	 * The file is being created on the internal vfs mount and shmfs
	 * accounting rules do not apply
	 */
	HUGETLB_ANONHUGE_INODE  = 2,
133 134
};

Linus Torvalds's avatar
Linus Torvalds committed
135 136 137 138 139 140 141
#ifdef CONFIG_HUGETLBFS
struct hugetlbfs_config {
	uid_t   uid;
	gid_t   gid;
	umode_t mode;
	long	nr_blocks;
	long	nr_inodes;
142
	struct hstate *hstate;
Linus Torvalds's avatar
Linus Torvalds committed
143 144 145 146 147 148 149 150
};

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;
151
	struct hstate *hstate;
Linus Torvalds's avatar
Linus Torvalds committed
152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169
};


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;
}

170
extern const struct file_operations hugetlbfs_file_operations;
171
extern const struct vm_operations_struct hugetlb_vm_ops;
172
struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
173
				struct user_struct **user, int creat_flags);
174 175
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
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;
Linus Torvalds's avatar
Linus Torvalds committed
185 186 187 188 189 190 191 192
}

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

193 194
#define is_file_hugepages(file)			0
#define set_file_hugepages(file)		BUG()
195
static inline struct file *hugetlb_file_setup(const char *name, size_t size,
196
		vm_flags_t acctflag, struct user_struct **user, int creat_flags)
197 198 199
{
	return ERR_PTR(-ENOSYS);
}
Linus Torvalds's avatar
Linus Torvalds committed
200 201 202

#endif /* !CONFIG_HUGETLBFS */

203 204 205 206 207 208
#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 */

209 210
#ifdef CONFIG_HUGETLB_PAGE

211
#define HSTATE_NAME_LEN 32
212 213
/* Defines one hugetlb page size */
struct hstate {
214 215
	int next_nid_to_alloc;
	int next_nid_to_free;
216 217 218 219 220 221 222 223 224 225 226 227
	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];
228
	char name[HSTATE_NAME_LEN];
229 230
};

231 232 233 234 235
struct huge_bootmem_page {
	struct list_head list;
	struct hstate *hstate;
};

236 237
struct page *alloc_huge_page_node(struct hstate *h, int nid);

238 239 240
/* arch callback */
int __init alloc_bootmem_huge_page(struct hstate *h);

241 242 243 244 245 246 247 248 249 250 251
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])
252

253
static inline struct hstate *hstate_inode(struct inode *i)
254
{
255 256 257
	struct hugetlbfs_sb_info *hsb;
	hsb = HUGETLBFS_SB(i->i_sb);
	return hsb->hstate;
258 259 260 261
}

static inline struct hstate *hstate_file(struct file *f)
{
262
	return hstate_inode(f->f_dentry->d_inode);
263 264
}

265
static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
266
{
267
	return hstate_file(vma->vm_file);
268 269 270 271 272 273 274
}

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

275 276
extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);

277 278
extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);

279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305
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>

306 307 308 309 310
static inline struct hstate *page_hstate(struct page *page)
{
	return size_to_hstate(PAGE_SIZE << compound_order(page));
}

311 312 313 314 315
static inline unsigned hstate_index_to_shift(unsigned index)
{
	return hstates[index].order + PAGE_SHIFT;
}

316 317
#else
struct hstate {};
318
#define alloc_huge_page_node(h, nid) NULL
319
#define alloc_bootmem_huge_page(h) NULL
320 321 322 323 324
#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
325
#define vma_kernel_pagesize(v) PAGE_SIZE
326
#define vma_mmu_pagesize(v) PAGE_SIZE
327 328
#define huge_page_order(h) 0
#define huge_page_shift(h) PAGE_SHIFT
329 330 331 332
static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1;
}
333
#define hstate_index_to_shift(index) 0
334 335
#endif

Linus Torvalds's avatar
Linus Torvalds committed
336
#endif /* _LINUX_HUGETLB_H */