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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_HUGETLB_H
2#define _LINUX_HUGETLB_H
3
Linus Torvaldsbe93d8c2011-05-26 12:03:50 -07004#include <linux/mm_types.h>
Alexey Dobriyan4e950f62007-07-30 02:36:13 +04005#include <linux/fs.h>
Naoya Horiguchi8edf3442010-05-28 09:29:15 +09006#include <linux/hugetlb_inline.h>
Alexey Dobriyan4e950f62007-07-30 02:36:13 +04007
Andrew Mortone9ea0e22009-09-24 14:47:45 -07008struct ctl_table;
9struct user_struct;
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#ifdef CONFIG_HUGETLB_PAGE
12
13#include <linux/mempolicy.h>
Adam Litke516dffd2007-03-01 15:46:08 -080014#include <linux/shm.h>
David Gibson63551ae2005-06-21 17:14:44 -070015#include <asm/tlbflush.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
Wu Fengguang20a03072009-06-16 15:32:22 -070017int PageHuge(struct page *page);
18
Mel Gormana1e78772008-07-23 21:27:23 -070019void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070020int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
21int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
22int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
Lee Schermerhorn06808b02009-12-14 17:58:21 -080023
24#ifdef CONFIG_NUMA
25int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
26 void __user *, size_t *, loff_t *);
27#endif
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
Hugh Dickins2a15efc2009-09-21 17:03:27 -070030int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
31 struct page **, struct vm_area_struct **,
32 unsigned long *, int *, int, unsigned int flags);
Mel Gorman04f2cbe2008-07-23 21:27:25 -070033void unmap_hugepage_range(struct vm_area_struct *,
34 unsigned long, unsigned long, struct page *);
35void __unmap_hugepage_range(struct vm_area_struct *,
36 unsigned long, unsigned long, struct page *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
Alexey Dobriyane1759c22008-10-15 23:50:22 +040038void hugetlb_report_meminfo(struct seq_file *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039int hugetlb_report_node_meminfo(int, char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040unsigned long hugetlb_total_pages(void);
Hugh Dickinsac9b9c62005-10-20 16:24:28 +010041int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
Hugh Dickins788c7df2009-06-23 13:49:05 +010042 unsigned long address, unsigned int flags);
Mel Gormana1e78772008-07-23 21:27:23 -070043int hugetlb_reserve_pages(struct inode *inode, long from, long to,
Mel Gorman5a6fe122009-02-10 14:02:27 +000044 struct vm_area_struct *vma,
KOSAKI Motohiroca16d142011-05-26 19:16:19 +090045 vm_flags_t vm_flags);
Chen, Kenneth Wa43a8c32006-06-23 02:03:15 -070046void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
Naoya Horiguchi6de2b1a2010-09-08 10:19:36 +090047int dequeue_hwpoisoned_huge_page(struct page *page);
Naoya Horiguchi0ebabb42010-09-08 10:19:34 +090048void copy_huge_page(struct page *dst, struct page *src);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Mel Gorman396faf02007-07-17 04:03:13 -070050extern unsigned long hugepages_treat_as_movable;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051extern const unsigned long hugetlb_zero, hugetlb_infinity;
52extern int sysctl_hugetlb_shm_group;
Jon Tollefson53ba51d2008-07-23 21:27:52 -070053extern struct list_head huge_boot_pages;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
David Gibson63551ae2005-06-21 17:14:44 -070055/* arch callbacks */
56
Andi Kleena5516432008-07-23 21:27:41 -070057pte_t *huge_pte_alloc(struct mm_struct *mm,
58 unsigned long addr, unsigned long sz);
David Gibson63551ae2005-06-21 17:14:44 -070059pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
Chen, Kenneth W39dde652006-12-06 20:32:03 -080060int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
David Gibson63551ae2005-06-21 17:14:44 -070061struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
62 int write);
63struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
64 pmd_t *pmd, int write);
Andi Kleenceb86872008-07-23 21:27:50 -070065struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
66 pud_t *pud, int write);
David Gibson63551ae2005-06-21 17:14:44 -070067int pmd_huge(pmd_t pmd);
Andi Kleenceb86872008-07-23 21:27:50 -070068int pud_huge(pud_t pmd);
Zhang, Yanmin8f860592006-03-22 00:08:50 -080069void hugetlb_change_protection(struct vm_area_struct *vma,
70 unsigned long address, unsigned long end, pgprot_t newprot);
David Gibson63551ae2005-06-21 17:14:44 -070071
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#else /* !CONFIG_HUGETLB_PAGE */
73
Wu Fengguang20a03072009-06-16 15:32:22 -070074static inline int PageHuge(struct page *page)
75{
76 return 0;
77}
78
Mel Gormana1e78772008-07-23 21:27:23 -070079static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
80{
81}
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083static inline unsigned long hugetlb_total_pages(void)
84{
85 return 0;
86}
87
Adam Litke5b23dbe2007-11-14 16:59:33 -080088#define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
Linus Torvalds1da177e2005-04-16 15:20:36 -070089#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
90#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
91#define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
Mel Gorman04f2cbe2008-07-23 21:27:25 -070092#define unmap_hugepage_range(vma, start, end, page) BUG()
Alexey Dobriyane1759c22008-10-15 23:50:22 +040093static inline void hugetlb_report_meminfo(struct seq_file *m)
94{
95}
Linus Torvalds1da177e2005-04-16 15:20:36 -070096#define hugetlb_report_node_meminfo(n, buf) 0
97#define follow_huge_pmd(mm, addr, pmd, write) NULL
Andi Kleenceb86872008-07-23 21:27:50 -070098#define follow_huge_pud(mm, addr, pud, write) NULL
Andi Kleena5516432008-07-23 21:27:41 -070099#define prepare_hugepage_range(file, addr, len) (-EINVAL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#define pmd_huge(x) 0
Andi Kleenceb86872008-07-23 21:27:50 -0700101#define pud_huge(x) 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102#define is_hugepage_only_range(mm, addr, len) 0
David Gibson9da61ae2006-03-22 00:08:57 -0800103#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
Hugh Dickins788c7df2009-06-23 13:49:05 +0100104#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
Naoya Horiguchi0fe6e202010-05-28 09:29:16 +0900105#define huge_pte_offset(mm, address) 0
Naoya Horiguchi6de2b1a2010-09-08 10:19:36 +0900106#define dequeue_hwpoisoned_huge_page(page) 0
Naoya Horiguchi0ebabb42010-09-08 10:19:34 +0900107static inline void copy_huge_page(struct page *dst, struct page *src)
108{
109}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Zhang, Yanmin8f860592006-03-22 00:08:50 -0800111#define hugetlb_change_protection(vma, address, end, newprot)
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113#ifndef HPAGE_MASK
Robin Holt51c6f662005-11-13 16:06:42 -0800114#define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
115#define HPAGE_SIZE PAGE_SIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#endif
117
118#endif /* !CONFIG_HUGETLB_PAGE */
119
Eric B Munson4e527802009-09-21 17:03:47 -0700120#define HUGETLB_ANON_FILE "anon_hugepage"
121
Eric B Munson6bfde052009-09-21 17:03:43 -0700122enum {
123 /*
124 * The file will be used as an shm file so shmfs accounting rules
125 * apply
126 */
127 HUGETLB_SHMFS_INODE = 1,
Eric B Munson4e527802009-09-21 17:03:47 -0700128 /*
129 * The file is being created on the internal vfs mount and shmfs
130 * accounting rules do not apply
131 */
132 HUGETLB_ANONHUGE_INODE = 2,
Eric B Munson6bfde052009-09-21 17:03:43 -0700133};
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135#ifdef CONFIG_HUGETLBFS
136struct hugetlbfs_config {
137 uid_t uid;
138 gid_t gid;
139 umode_t mode;
140 long nr_blocks;
141 long nr_inodes;
Andi Kleena137e1c2008-07-23 21:27:43 -0700142 struct hstate *hstate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143};
144
145struct hugetlbfs_sb_info {
146 long max_blocks; /* blocks allowed */
147 long free_blocks; /* blocks free */
148 long max_inodes; /* inodes allowed */
149 long free_inodes; /* inodes free */
150 spinlock_t stat_lock;
Andi Kleena137e1c2008-07-23 21:27:43 -0700151 struct hstate *hstate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152};
153
154
155struct hugetlbfs_inode_info {
156 struct shared_policy policy;
157 struct inode vfs_inode;
158};
159
160static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
161{
162 return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
163}
164
165static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
166{
167 return sb->s_fs_info;
168}
169
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800170extern const struct file_operations hugetlbfs_file_operations;
Alexey Dobriyanf0f37e22009-09-27 22:29:37 +0400171extern const struct vm_operations_struct hugetlb_vm_ops;
KOSAKI Motohiroca16d142011-05-26 19:16:19 +0900172struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
Eric B Munson6bfde052009-09-21 17:03:43 -0700173 struct user_struct **user, int creat_flags);
Adam Litke9a119c02007-11-14 16:59:41 -0800174int hugetlb_get_quota(struct address_space *mapping, long delta);
175void hugetlb_put_quota(struct address_space *mapping, long delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
177static inline int is_file_hugepages(struct file *file)
178{
Adam Litke516dffd2007-03-01 15:46:08 -0800179 if (file->f_op == &hugetlbfs_file_operations)
180 return 1;
181 if (is_file_shm_hugepages(file))
182 return 1;
183
184 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185}
186
187static inline void set_file_hugepages(struct file *file)
188{
189 file->f_op = &hugetlbfs_file_operations;
190}
191#else /* !CONFIG_HUGETLBFS */
192
Stefan Richter1db85082009-02-10 23:27:32 +0100193#define is_file_hugepages(file) 0
194#define set_file_hugepages(file) BUG()
Andrew Mortone9ea0e22009-09-24 14:47:45 -0700195static inline struct file *hugetlb_file_setup(const char *name, size_t size,
KOSAKI Motohiroca16d142011-05-26 19:16:19 +0900196 vm_flags_t acctflag, struct user_struct **user, int creat_flags)
Andrew Mortone9ea0e22009-09-24 14:47:45 -0700197{
198 return ERR_PTR(-ENOSYS);
199}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201#endif /* !CONFIG_HUGETLBFS */
202
Adrian Bunkd2ba27e82007-05-06 14:49:00 -0700203#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
204unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
205 unsigned long len, unsigned long pgoff,
206 unsigned long flags);
207#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
208
Andi Kleena5516432008-07-23 21:27:41 -0700209#ifdef CONFIG_HUGETLB_PAGE
210
Nishanth Aravamudana3437872008-07-23 21:27:44 -0700211#define HSTATE_NAME_LEN 32
Andi Kleena5516432008-07-23 21:27:41 -0700212/* Defines one hugetlb page size */
213struct hstate {
Lee Schermerhorne8c5c822009-09-21 17:01:22 -0700214 int next_nid_to_alloc;
215 int next_nid_to_free;
Andi Kleena5516432008-07-23 21:27:41 -0700216 unsigned int order;
217 unsigned long mask;
218 unsigned long max_huge_pages;
219 unsigned long nr_huge_pages;
220 unsigned long free_huge_pages;
221 unsigned long resv_huge_pages;
222 unsigned long surplus_huge_pages;
223 unsigned long nr_overcommit_huge_pages;
224 struct list_head hugepage_freelists[MAX_NUMNODES];
225 unsigned int nr_huge_pages_node[MAX_NUMNODES];
226 unsigned int free_huge_pages_node[MAX_NUMNODES];
227 unsigned int surplus_huge_pages_node[MAX_NUMNODES];
Nishanth Aravamudana3437872008-07-23 21:27:44 -0700228 char name[HSTATE_NAME_LEN];
Andi Kleena5516432008-07-23 21:27:41 -0700229};
230
Jon Tollefson53ba51d2008-07-23 21:27:52 -0700231struct huge_bootmem_page {
232 struct list_head list;
233 struct hstate *hstate;
Becky Bruceee8f2482011-07-25 17:11:50 -0700234#ifdef CONFIG_HIGHMEM
235 phys_addr_t phys;
236#endif
Jon Tollefson53ba51d2008-07-23 21:27:52 -0700237};
238
Naoya Horiguchibf50bab2010-09-08 10:19:33 +0900239struct page *alloc_huge_page_node(struct hstate *h, int nid);
240
Jon Tollefson53ba51d2008-07-23 21:27:52 -0700241/* arch callback */
242int __init alloc_bootmem_huge_page(struct hstate *h);
243
Andi Kleene5ff2152008-07-23 21:27:42 -0700244void __init hugetlb_add_hstate(unsigned order);
245struct hstate *size_to_hstate(unsigned long size);
246
247#ifndef HUGE_MAX_HSTATE
248#define HUGE_MAX_HSTATE 1
249#endif
250
251extern struct hstate hstates[HUGE_MAX_HSTATE];
252extern unsigned int default_hstate_idx;
253
254#define default_hstate (hstates[default_hstate_idx])
Andi Kleena5516432008-07-23 21:27:41 -0700255
Andi Kleena137e1c2008-07-23 21:27:43 -0700256static inline struct hstate *hstate_inode(struct inode *i)
Andi Kleena5516432008-07-23 21:27:41 -0700257{
Andi Kleena137e1c2008-07-23 21:27:43 -0700258 struct hugetlbfs_sb_info *hsb;
259 hsb = HUGETLBFS_SB(i->i_sb);
260 return hsb->hstate;
Andi Kleena5516432008-07-23 21:27:41 -0700261}
262
263static inline struct hstate *hstate_file(struct file *f)
264{
Andi Kleena137e1c2008-07-23 21:27:43 -0700265 return hstate_inode(f->f_dentry->d_inode);
Andi Kleena5516432008-07-23 21:27:41 -0700266}
267
Andi Kleena137e1c2008-07-23 21:27:43 -0700268static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
Andi Kleena5516432008-07-23 21:27:41 -0700269{
Andi Kleena137e1c2008-07-23 21:27:43 -0700270 return hstate_file(vma->vm_file);
Andi Kleena5516432008-07-23 21:27:41 -0700271}
272
273static inline unsigned long huge_page_size(struct hstate *h)
274{
275 return (unsigned long)PAGE_SIZE << h->order;
276}
277
Mel Gorman08fba692009-01-06 14:38:53 -0800278extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
279
Mel Gorman33402892009-01-06 14:38:54 -0800280extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
281
Andi Kleena5516432008-07-23 21:27:41 -0700282static inline unsigned long huge_page_mask(struct hstate *h)
283{
284 return h->mask;
285}
286
287static inline unsigned int huge_page_order(struct hstate *h)
288{
289 return h->order;
290}
291
292static inline unsigned huge_page_shift(struct hstate *h)
293{
294 return h->order + PAGE_SHIFT;
295}
296
297static inline unsigned int pages_per_huge_page(struct hstate *h)
298{
299 return 1 << h->order;
300}
301
302static inline unsigned int blocks_per_huge_page(struct hstate *h)
303{
304 return huge_page_size(h) / 512;
305}
306
307#include <asm/hugetlb.h>
308
Andi Kleene5ff2152008-07-23 21:27:42 -0700309static inline struct hstate *page_hstate(struct page *page)
310{
311 return size_to_hstate(PAGE_SIZE << compound_order(page));
312}
313
Andi Kleenaa50d3a2010-10-06 21:45:00 +0200314static inline unsigned hstate_index_to_shift(unsigned index)
315{
316 return hstates[index].order + PAGE_SHIFT;
317}
318
Andi Kleena5516432008-07-23 21:27:41 -0700319#else
320struct hstate {};
Naoya Horiguchibf50bab2010-09-08 10:19:33 +0900321#define alloc_huge_page_node(h, nid) NULL
Jon Tollefson53ba51d2008-07-23 21:27:52 -0700322#define alloc_bootmem_huge_page(h) NULL
Andi Kleena5516432008-07-23 21:27:41 -0700323#define hstate_file(f) NULL
324#define hstate_vma(v) NULL
325#define hstate_inode(i) NULL
326#define huge_page_size(h) PAGE_SIZE
327#define huge_page_mask(h) PAGE_MASK
Mel Gorman08fba692009-01-06 14:38:53 -0800328#define vma_kernel_pagesize(v) PAGE_SIZE
Mel Gorman33402892009-01-06 14:38:54 -0800329#define vma_mmu_pagesize(v) PAGE_SIZE
Andi Kleena5516432008-07-23 21:27:41 -0700330#define huge_page_order(h) 0
331#define huge_page_shift(h) PAGE_SHIFT
Andrea Righi510a35d2008-07-26 15:22:27 -0700332static inline unsigned int pages_per_huge_page(struct hstate *h)
333{
334 return 1;
335}
Andi Kleenaa50d3a2010-10-06 21:45:00 +0200336#define hstate_index_to_shift(index) 0
Andi Kleena5516432008-07-23 21:27:41 -0700337#endif
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339#endif /* _LINUX_HUGETLB_H */