1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_HUGETLB_H
3 #define _LINUX_HUGETLB_H
5 #include <linux/mm_types.h>
6 #include <linux/mmdebug.h>
8 #include <linux/hugetlb_inline.h>
9 #include <linux/cgroup.h>
10 #include <linux/list.h>
11 #include <linux/kref.h>
12 #include <linux/pgtable.h>
13 #include <linux/gfp.h>
20 typedef struct { unsigned long pd
; } hugepd_t
;
21 #define is_hugepd(hugepd) (0)
22 #define __hugepd(x) ((hugepd_t) { (x) })
25 #ifdef CONFIG_HUGETLB_PAGE
27 #include <linux/mempolicy.h>
28 #include <linux/shm.h>
29 #include <asm/tlbflush.h>
31 struct hugepage_subpool
{
34 long max_hpages
; /* Maximum huge pages or -1 if no maximum. */
35 long used_hpages
; /* Used count against maximum, includes */
36 /* both alloced and reserved pages. */
37 struct hstate
*hstate
;
38 long min_hpages
; /* Minimum huge pages or -1 if no minimum. */
39 long rsv_hpages
; /* Pages reserved against global pool to */
40 /* satisfy minimum size. */
46 struct list_head regions
;
47 long adds_in_progress
;
48 struct list_head region_cache
;
49 long region_cache_count
;
50 #ifdef CONFIG_CGROUP_HUGETLB
52 * On private mappings, the counter to uncharge reservations is stored
53 * here. If these fields are 0, then either the mapping is shared, or
54 * cgroup accounting is disabled for this resv_map.
56 struct page_counter
*reservation_counter
;
57 unsigned long pages_per_hpage
;
58 struct cgroup_subsys_state
*css
;
63 * Region tracking -- allows tracking of reservations and instantiated pages
64 * across the pages in a mapping.
66 * The region data structures are embedded into a resv_map and protected
67 * by a resv_map's lock. The set of regions within the resv_map represent
68 * reservations for huge pages, or huge pages that have already been
69 * instantiated within the map. The from and to elements are huge page
70 * indicies into the associated mapping. from indicates the starting index
71 * of the region. to represents the first index past the end of the region.
73 * For example, a file region structure with from == 0 and to == 4 represents
74 * four huge pages in a mapping. It is important to note that the to element
75 * represents the first element past the end of the region. This is used in
76 * arithmetic as 4(to) - 0(from) = 4 huge pages in the region.
78 * Interval notation of the form [from, to) will be used to indicate that
79 * the endpoint from is inclusive and to is exclusive.
82 struct list_head link
;
85 #ifdef CONFIG_CGROUP_HUGETLB
87 * On shared mappings, each reserved region appears as a struct
88 * file_region in resv_map. These fields hold the info needed to
89 * uncharge each reservation.
91 struct page_counter
*reservation_counter
;
92 struct cgroup_subsys_state
*css
;
96 extern struct resv_map
*resv_map_alloc(void);
97 void resv_map_release(struct kref
*ref
);
99 extern spinlock_t hugetlb_lock
;
100 extern int hugetlb_max_hstate __read_mostly
;
101 #define for_each_hstate(h) \
102 for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)
104 struct hugepage_subpool
*hugepage_new_subpool(struct hstate
*h
, long max_hpages
,
106 void hugepage_put_subpool(struct hugepage_subpool
*spool
);
108 void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
);
109 int hugetlb_sysctl_handler(struct ctl_table
*, int, void *, size_t *, loff_t
*);
110 int hugetlb_overcommit_handler(struct ctl_table
*, int, void *, size_t *,
112 int hugetlb_treat_movable_handler(struct ctl_table
*, int, void *, size_t *,
114 int hugetlb_mempolicy_sysctl_handler(struct ctl_table
*, int, void *, size_t *,
117 int copy_hugetlb_page_range(struct mm_struct
*, struct mm_struct
*, struct vm_area_struct
*);
118 long follow_hugetlb_page(struct mm_struct
*, struct vm_area_struct
*,
119 struct page
**, struct vm_area_struct
**,
120 unsigned long *, unsigned long *, long, unsigned int,
122 void unmap_hugepage_range(struct vm_area_struct
*,
123 unsigned long, unsigned long, struct page
*);
124 void __unmap_hugepage_range_final(struct mmu_gather
*tlb
,
125 struct vm_area_struct
*vma
,
126 unsigned long start
, unsigned long end
,
127 struct page
*ref_page
);
128 void __unmap_hugepage_range(struct mmu_gather
*tlb
, struct vm_area_struct
*vma
,
129 unsigned long start
, unsigned long end
,
130 struct page
*ref_page
);
131 void hugetlb_report_meminfo(struct seq_file
*);
132 int hugetlb_report_node_meminfo(char *buf
, int len
, int nid
);
133 void hugetlb_show_meminfo(void);
134 unsigned long hugetlb_total_pages(void);
135 vm_fault_t
hugetlb_fault(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
136 unsigned long address
, unsigned int flags
);
137 int hugetlb_mcopy_atomic_pte(struct mm_struct
*dst_mm
, pte_t
*dst_pte
,
138 struct vm_area_struct
*dst_vma
,
139 unsigned long dst_addr
,
140 unsigned long src_addr
,
141 struct page
**pagep
);
142 bool hugetlb_reserve_pages(struct inode
*inode
, long from
, long to
,
143 struct vm_area_struct
*vma
,
144 vm_flags_t vm_flags
);
145 long hugetlb_unreserve_pages(struct inode
*inode
, long start
, long end
,
147 bool isolate_huge_page(struct page
*page
, struct list_head
*list
);
148 void putback_active_hugepage(struct page
*page
);
149 void move_hugetlb_state(struct page
*oldpage
, struct page
*newpage
, int reason
);
150 void free_huge_page(struct page
*page
);
151 void hugetlb_fix_reserve_counts(struct inode
*inode
);
152 extern struct mutex
*hugetlb_fault_mutex_table
;
153 u32
hugetlb_fault_mutex_hash(struct address_space
*mapping
, pgoff_t idx
);
155 pte_t
*huge_pmd_share(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
156 unsigned long addr
, pud_t
*pud
);
158 struct address_space
*hugetlb_page_mapping_lock_write(struct page
*hpage
);
160 extern int sysctl_hugetlb_shm_group
;
161 extern struct list_head huge_boot_pages
;
165 pte_t
*huge_pte_alloc(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
166 unsigned long addr
, unsigned long sz
);
167 pte_t
*huge_pte_offset(struct mm_struct
*mm
,
168 unsigned long addr
, unsigned long sz
);
169 int huge_pmd_unshare(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
170 unsigned long *addr
, pte_t
*ptep
);
171 void adjust_range_if_pmd_sharing_possible(struct vm_area_struct
*vma
,
172 unsigned long *start
, unsigned long *end
);
173 struct page
*follow_huge_addr(struct mm_struct
*mm
, unsigned long address
,
175 struct page
*follow_huge_pd(struct vm_area_struct
*vma
,
176 unsigned long address
, hugepd_t hpd
,
177 int flags
, int pdshift
);
178 struct page
*follow_huge_pmd(struct mm_struct
*mm
, unsigned long address
,
179 pmd_t
*pmd
, int flags
);
180 struct page
*follow_huge_pud(struct mm_struct
*mm
, unsigned long address
,
181 pud_t
*pud
, int flags
);
182 struct page
*follow_huge_pgd(struct mm_struct
*mm
, unsigned long address
,
183 pgd_t
*pgd
, int flags
);
185 int pmd_huge(pmd_t pmd
);
186 int pud_huge(pud_t pud
);
187 unsigned long hugetlb_change_protection(struct vm_area_struct
*vma
,
188 unsigned long address
, unsigned long end
, pgprot_t newprot
);
190 bool is_hugetlb_entry_migration(pte_t pte
);
191 void hugetlb_unshare_all_pmds(struct vm_area_struct
*vma
);
193 #else /* !CONFIG_HUGETLB_PAGE */
195 static inline void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
)
199 static inline unsigned long hugetlb_total_pages(void)
204 static inline struct address_space
*hugetlb_page_mapping_lock_write(
210 static inline int huge_pmd_unshare(struct mm_struct
*mm
,
211 struct vm_area_struct
*vma
,
212 unsigned long *addr
, pte_t
*ptep
)
217 static inline void adjust_range_if_pmd_sharing_possible(
218 struct vm_area_struct
*vma
,
219 unsigned long *start
, unsigned long *end
)
223 static inline long follow_hugetlb_page(struct mm_struct
*mm
,
224 struct vm_area_struct
*vma
, struct page
**pages
,
225 struct vm_area_struct
**vmas
, unsigned long *position
,
226 unsigned long *nr_pages
, long i
, unsigned int flags
,
233 static inline struct page
*follow_huge_addr(struct mm_struct
*mm
,
234 unsigned long address
, int write
)
236 return ERR_PTR(-EINVAL
);
239 static inline int copy_hugetlb_page_range(struct mm_struct
*dst
,
240 struct mm_struct
*src
, struct vm_area_struct
*vma
)
246 static inline void hugetlb_report_meminfo(struct seq_file
*m
)
250 static inline int hugetlb_report_node_meminfo(char *buf
, int len
, int nid
)
255 static inline void hugetlb_show_meminfo(void)
259 static inline struct page
*follow_huge_pd(struct vm_area_struct
*vma
,
260 unsigned long address
, hugepd_t hpd
, int flags
,
266 static inline struct page
*follow_huge_pmd(struct mm_struct
*mm
,
267 unsigned long address
, pmd_t
*pmd
, int flags
)
272 static inline struct page
*follow_huge_pud(struct mm_struct
*mm
,
273 unsigned long address
, pud_t
*pud
, int flags
)
278 static inline struct page
*follow_huge_pgd(struct mm_struct
*mm
,
279 unsigned long address
, pgd_t
*pgd
, int flags
)
284 static inline int prepare_hugepage_range(struct file
*file
,
285 unsigned long addr
, unsigned long len
)
290 static inline int pmd_huge(pmd_t pmd
)
295 static inline int pud_huge(pud_t pud
)
300 static inline int is_hugepage_only_range(struct mm_struct
*mm
,
301 unsigned long addr
, unsigned long len
)
306 static inline void hugetlb_free_pgd_range(struct mmu_gather
*tlb
,
307 unsigned long addr
, unsigned long end
,
308 unsigned long floor
, unsigned long ceiling
)
313 static inline int hugetlb_mcopy_atomic_pte(struct mm_struct
*dst_mm
,
315 struct vm_area_struct
*dst_vma
,
316 unsigned long dst_addr
,
317 unsigned long src_addr
,
324 static inline pte_t
*huge_pte_offset(struct mm_struct
*mm
, unsigned long addr
,
330 static inline bool isolate_huge_page(struct page
*page
, struct list_head
*list
)
335 static inline void putback_active_hugepage(struct page
*page
)
339 static inline void move_hugetlb_state(struct page
*oldpage
,
340 struct page
*newpage
, int reason
)
344 static inline unsigned long hugetlb_change_protection(
345 struct vm_area_struct
*vma
, unsigned long address
,
346 unsigned long end
, pgprot_t newprot
)
351 static inline void __unmap_hugepage_range_final(struct mmu_gather
*tlb
,
352 struct vm_area_struct
*vma
, unsigned long start
,
353 unsigned long end
, struct page
*ref_page
)
358 static inline void __unmap_hugepage_range(struct mmu_gather
*tlb
,
359 struct vm_area_struct
*vma
, unsigned long start
,
360 unsigned long end
, struct page
*ref_page
)
365 static inline vm_fault_t
hugetlb_fault(struct mm_struct
*mm
,
366 struct vm_area_struct
*vma
, unsigned long address
,
373 static inline void hugetlb_unshare_all_pmds(struct vm_area_struct
*vma
) { }
375 #endif /* !CONFIG_HUGETLB_PAGE */
377 * hugepages at page global directory. If arch support
378 * hugepages at pgd level, they need to define this.
381 #define pgd_huge(x) 0
384 #define p4d_huge(x) 0
388 static inline int pgd_write(pgd_t pgd
)
395 #define HUGETLB_ANON_FILE "anon_hugepage"
399 * The file will be used as an shm file so shmfs accounting rules
402 HUGETLB_SHMFS_INODE
= 1,
404 * The file is being created on the internal vfs mount and shmfs
405 * accounting rules do not apply
407 HUGETLB_ANONHUGE_INODE
= 2,
410 #ifdef CONFIG_HUGETLBFS
411 struct hugetlbfs_sb_info
{
412 long max_inodes
; /* inodes allowed */
413 long free_inodes
; /* inodes free */
414 spinlock_t stat_lock
;
415 struct hstate
*hstate
;
416 struct hugepage_subpool
*spool
;
422 static inline struct hugetlbfs_sb_info
*HUGETLBFS_SB(struct super_block
*sb
)
424 return sb
->s_fs_info
;
427 struct hugetlbfs_inode_info
{
428 struct shared_policy policy
;
429 struct inode vfs_inode
;
433 static inline struct hugetlbfs_inode_info
*HUGETLBFS_I(struct inode
*inode
)
435 return container_of(inode
, struct hugetlbfs_inode_info
, vfs_inode
);
438 extern const struct file_operations hugetlbfs_file_operations
;
439 extern const struct vm_operations_struct hugetlb_vm_ops
;
440 struct file
*hugetlb_file_setup(const char *name
, size_t size
, vm_flags_t acct
,
441 struct user_struct
**user
, int creat_flags
,
444 static inline bool is_file_hugepages(struct file
*file
)
446 if (file
->f_op
== &hugetlbfs_file_operations
)
449 return is_file_shm_hugepages(file
);
452 static inline struct hstate
*hstate_inode(struct inode
*i
)
454 return HUGETLBFS_SB(i
->i_sb
)->hstate
;
456 #else /* !CONFIG_HUGETLBFS */
458 #define is_file_hugepages(file) false
459 static inline struct file
*
460 hugetlb_file_setup(const char *name
, size_t size
, vm_flags_t acctflag
,
461 struct user_struct
**user
, int creat_flags
,
464 return ERR_PTR(-ENOSYS
);
467 static inline struct hstate
*hstate_inode(struct inode
*i
)
471 #endif /* !CONFIG_HUGETLBFS */
473 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
474 unsigned long hugetlb_get_unmapped_area(struct file
*file
, unsigned long addr
,
475 unsigned long len
, unsigned long pgoff
,
476 unsigned long flags
);
477 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
480 * huegtlb page specific state flags. These flags are located in page.private
481 * of the hugetlb head page. Functions created via the below macros should be
482 * used to manipulate these flags.
484 * HPG_restore_reserve - Set when a hugetlb page consumes a reservation at
485 * allocation time. Cleared when page is fully instantiated. Free
486 * routine checks flag to restore a reservation on error paths.
487 * Synchronization: Examined or modified by code that knows it has
488 * the only reference to page. i.e. After allocation but before use
489 * or when the page is being freed.
490 * HPG_migratable - Set after a newly allocated page is added to the page
491 * cache and/or page tables. Indicates the page is a candidate for
493 * Synchronization: Initially set after new page allocation with no
494 * locking. When examined and modified during migration processing
495 * (isolate, migrate, putback) the hugetlb_lock is held.
496 * HPG_temporary - - Set on a page that is temporarily allocated from the buddy
497 * allocator. Typically used for migration target pages when no pages
498 * are available in the pool. The hugetlb free page path will
499 * immediately free pages with this flag set to the buddy allocator.
500 * Synchronization: Can be set after huge page allocation from buddy when
501 * code knows it has only reference. All other examinations and
502 * modifications require hugetlb_lock.
503 * HPG_freed - Set when page is on the free lists.
504 * Synchronization: hugetlb_lock held for examination and modification.
506 enum hugetlb_page_flags
{
507 HPG_restore_reserve
= 0,
515 * Macros to create test, set and clear function definitions for
516 * hugetlb specific page flags.
518 #ifdef CONFIG_HUGETLB_PAGE
519 #define TESTHPAGEFLAG(uname, flname) \
520 static inline int HPage##uname(struct page *page) \
521 { return test_bit(HPG_##flname, &(page->private)); }
523 #define SETHPAGEFLAG(uname, flname) \
524 static inline void SetHPage##uname(struct page *page) \
525 { set_bit(HPG_##flname, &(page->private)); }
527 #define CLEARHPAGEFLAG(uname, flname) \
528 static inline void ClearHPage##uname(struct page *page) \
529 { clear_bit(HPG_##flname, &(page->private)); }
531 #define TESTHPAGEFLAG(uname, flname) \
532 static inline int HPage##uname(struct page *page) \
535 #define SETHPAGEFLAG(uname, flname) \
536 static inline void SetHPage##uname(struct page *page) \
539 #define CLEARHPAGEFLAG(uname, flname) \
540 static inline void ClearHPage##uname(struct page *page) \
544 #define HPAGEFLAG(uname, flname) \
545 TESTHPAGEFLAG(uname, flname) \
546 SETHPAGEFLAG(uname, flname) \
547 CLEARHPAGEFLAG(uname, flname) \
550 * Create functions associated with hugetlb page flags
552 HPAGEFLAG(RestoreReserve
, restore_reserve
)
553 HPAGEFLAG(Migratable
, migratable
)
554 HPAGEFLAG(Temporary
, temporary
)
555 HPAGEFLAG(Freed
, freed
)
557 #ifdef CONFIG_HUGETLB_PAGE
559 #define HSTATE_NAME_LEN 32
560 /* Defines one hugetlb page size */
562 struct mutex resize_lock
;
563 int next_nid_to_alloc
;
564 int next_nid_to_free
;
567 unsigned long max_huge_pages
;
568 unsigned long nr_huge_pages
;
569 unsigned long free_huge_pages
;
570 unsigned long resv_huge_pages
;
571 unsigned long surplus_huge_pages
;
572 unsigned long nr_overcommit_huge_pages
;
573 struct list_head hugepage_activelist
;
574 struct list_head hugepage_freelists
[MAX_NUMNODES
];
575 unsigned int nr_huge_pages_node
[MAX_NUMNODES
];
576 unsigned int free_huge_pages_node
[MAX_NUMNODES
];
577 unsigned int surplus_huge_pages_node
[MAX_NUMNODES
];
578 #ifdef CONFIG_CGROUP_HUGETLB
579 /* cgroup control files */
580 struct cftype cgroup_files_dfl
[7];
581 struct cftype cgroup_files_legacy
[9];
583 char name
[HSTATE_NAME_LEN
];
586 struct huge_bootmem_page
{
587 struct list_head list
;
588 struct hstate
*hstate
;
591 int isolate_or_dissolve_huge_page(struct page
*page
);
592 struct page
*alloc_huge_page(struct vm_area_struct
*vma
,
593 unsigned long addr
, int avoid_reserve
);
594 struct page
*alloc_huge_page_nodemask(struct hstate
*h
, int preferred_nid
,
595 nodemask_t
*nmask
, gfp_t gfp_mask
);
596 struct page
*alloc_huge_page_vma(struct hstate
*h
, struct vm_area_struct
*vma
,
597 unsigned long address
);
598 int huge_add_to_page_cache(struct page
*page
, struct address_space
*mapping
,
602 int __init
__alloc_bootmem_huge_page(struct hstate
*h
);
603 int __init
alloc_bootmem_huge_page(struct hstate
*h
);
605 void __init
hugetlb_add_hstate(unsigned order
);
606 bool __init
arch_hugetlb_valid_size(unsigned long size
);
607 struct hstate
*size_to_hstate(unsigned long size
);
609 #ifndef HUGE_MAX_HSTATE
610 #define HUGE_MAX_HSTATE 1
613 extern struct hstate hstates
[HUGE_MAX_HSTATE
];
614 extern unsigned int default_hstate_idx
;
616 #define default_hstate (hstates[default_hstate_idx])
619 * hugetlb page subpool pointer located in hpage[1].private
621 static inline struct hugepage_subpool
*hugetlb_page_subpool(struct page
*hpage
)
623 return (struct hugepage_subpool
*)(hpage
+1)->private;
626 static inline void hugetlb_set_page_subpool(struct page
*hpage
,
627 struct hugepage_subpool
*subpool
)
629 set_page_private(hpage
+1, (unsigned long)subpool
);
632 static inline struct hstate
*hstate_file(struct file
*f
)
634 return hstate_inode(file_inode(f
));
637 static inline struct hstate
*hstate_sizelog(int page_size_log
)
640 return &default_hstate
;
642 return size_to_hstate(1UL << page_size_log
);
645 static inline struct hstate
*hstate_vma(struct vm_area_struct
*vma
)
647 return hstate_file(vma
->vm_file
);
650 static inline unsigned long huge_page_size(struct hstate
*h
)
652 return (unsigned long)PAGE_SIZE
<< h
->order
;
655 extern unsigned long vma_kernel_pagesize(struct vm_area_struct
*vma
);
657 extern unsigned long vma_mmu_pagesize(struct vm_area_struct
*vma
);
659 static inline unsigned long huge_page_mask(struct hstate
*h
)
664 static inline unsigned int huge_page_order(struct hstate
*h
)
669 static inline unsigned huge_page_shift(struct hstate
*h
)
671 return h
->order
+ PAGE_SHIFT
;
674 static inline bool hstate_is_gigantic(struct hstate
*h
)
676 return huge_page_order(h
) >= MAX_ORDER
;
679 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
681 return 1 << h
->order
;
684 static inline unsigned int blocks_per_huge_page(struct hstate
*h
)
686 return huge_page_size(h
) / 512;
689 #include <asm/hugetlb.h>
691 #ifndef is_hugepage_only_range
692 static inline int is_hugepage_only_range(struct mm_struct
*mm
,
693 unsigned long addr
, unsigned long len
)
697 #define is_hugepage_only_range is_hugepage_only_range
700 #ifndef arch_clear_hugepage_flags
701 static inline void arch_clear_hugepage_flags(struct page
*page
) { }
702 #define arch_clear_hugepage_flags arch_clear_hugepage_flags
705 #ifndef arch_make_huge_pte
706 static inline pte_t
arch_make_huge_pte(pte_t entry
, struct vm_area_struct
*vma
,
707 struct page
*page
, int writable
)
713 static inline struct hstate
*page_hstate(struct page
*page
)
715 VM_BUG_ON_PAGE(!PageHuge(page
), page
);
716 return size_to_hstate(page_size(page
));
719 static inline unsigned hstate_index_to_shift(unsigned index
)
721 return hstates
[index
].order
+ PAGE_SHIFT
;
724 static inline int hstate_index(struct hstate
*h
)
729 pgoff_t
__basepage_index(struct page
*page
);
731 /* Return page->index in PAGE_SIZE units */
732 static inline pgoff_t
basepage_index(struct page
*page
)
734 if (!PageCompound(page
))
737 return __basepage_index(page
);
740 extern int dissolve_free_huge_page(struct page
*page
);
741 extern int dissolve_free_huge_pages(unsigned long start_pfn
,
742 unsigned long end_pfn
);
744 #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
745 #ifndef arch_hugetlb_migration_supported
746 static inline bool arch_hugetlb_migration_supported(struct hstate
*h
)
748 if ((huge_page_shift(h
) == PMD_SHIFT
) ||
749 (huge_page_shift(h
) == PUD_SHIFT
) ||
750 (huge_page_shift(h
) == PGDIR_SHIFT
))
757 static inline bool arch_hugetlb_migration_supported(struct hstate
*h
)
763 static inline bool hugepage_migration_supported(struct hstate
*h
)
765 return arch_hugetlb_migration_supported(h
);
769 * Movability check is different as compared to migration check.
770 * It determines whether or not a huge page should be placed on
771 * movable zone or not. Movability of any huge page should be
772 * required only if huge page size is supported for migration.
773 * There wont be any reason for the huge page to be movable if
774 * it is not migratable to start with. Also the size of the huge
775 * page should be large enough to be placed under a movable zone
776 * and still feasible enough to be migratable. Just the presence
777 * in movable zone does not make the migration feasible.
779 * So even though large huge page sizes like the gigantic ones
780 * are migratable they should not be movable because its not
781 * feasible to migrate them from movable zone.
783 static inline bool hugepage_movable_supported(struct hstate
*h
)
785 if (!hugepage_migration_supported(h
))
788 if (hstate_is_gigantic(h
))
793 /* Movability of hugepages depends on migration support. */
794 static inline gfp_t
htlb_alloc_mask(struct hstate
*h
)
796 if (hugepage_movable_supported(h
))
797 return GFP_HIGHUSER_MOVABLE
;
802 static inline gfp_t
htlb_modify_alloc_mask(struct hstate
*h
, gfp_t gfp_mask
)
804 gfp_t modified_mask
= htlb_alloc_mask(h
);
806 /* Some callers might want to enforce node */
807 modified_mask
|= (gfp_mask
& __GFP_THISNODE
);
809 modified_mask
|= (gfp_mask
& __GFP_NOWARN
);
811 return modified_mask
;
814 static inline spinlock_t
*huge_pte_lockptr(struct hstate
*h
,
815 struct mm_struct
*mm
, pte_t
*pte
)
817 if (huge_page_size(h
) == PMD_SIZE
)
818 return pmd_lockptr(mm
, (pmd_t
*) pte
);
819 VM_BUG_ON(huge_page_size(h
) == PAGE_SIZE
);
820 return &mm
->page_table_lock
;
823 #ifndef hugepages_supported
825 * Some platform decide whether they support huge pages at boot
826 * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0
827 * when there is no such support
829 #define hugepages_supported() (HPAGE_SHIFT != 0)
832 void hugetlb_report_usage(struct seq_file
*m
, struct mm_struct
*mm
);
834 static inline void hugetlb_count_add(long l
, struct mm_struct
*mm
)
836 atomic_long_add(l
, &mm
->hugetlb_usage
);
839 static inline void hugetlb_count_sub(long l
, struct mm_struct
*mm
)
841 atomic_long_sub(l
, &mm
->hugetlb_usage
);
844 #ifndef set_huge_swap_pte_at
845 static inline void set_huge_swap_pte_at(struct mm_struct
*mm
, unsigned long addr
,
846 pte_t
*ptep
, pte_t pte
, unsigned long sz
)
848 set_huge_pte_at(mm
, addr
, ptep
, pte
);
852 #ifndef huge_ptep_modify_prot_start
853 #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
854 static inline pte_t
huge_ptep_modify_prot_start(struct vm_area_struct
*vma
,
855 unsigned long addr
, pte_t
*ptep
)
857 return huge_ptep_get_and_clear(vma
->vm_mm
, addr
, ptep
);
861 #ifndef huge_ptep_modify_prot_commit
862 #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
863 static inline void huge_ptep_modify_prot_commit(struct vm_area_struct
*vma
,
864 unsigned long addr
, pte_t
*ptep
,
865 pte_t old_pte
, pte_t pte
)
867 set_huge_pte_at(vma
->vm_mm
, addr
, ptep
, pte
);
871 #else /* CONFIG_HUGETLB_PAGE */
874 static inline int isolate_or_dissolve_huge_page(struct page
*page
)
879 static inline struct page
*alloc_huge_page(struct vm_area_struct
*vma
,
886 static inline struct page
*
887 alloc_huge_page_nodemask(struct hstate
*h
, int preferred_nid
,
888 nodemask_t
*nmask
, gfp_t gfp_mask
)
893 static inline struct page
*alloc_huge_page_vma(struct hstate
*h
,
894 struct vm_area_struct
*vma
,
895 unsigned long address
)
900 static inline int __alloc_bootmem_huge_page(struct hstate
*h
)
905 static inline struct hstate
*hstate_file(struct file
*f
)
910 static inline struct hstate
*hstate_sizelog(int page_size_log
)
915 static inline struct hstate
*hstate_vma(struct vm_area_struct
*vma
)
920 static inline struct hstate
*page_hstate(struct page
*page
)
925 static inline unsigned long huge_page_size(struct hstate
*h
)
930 static inline unsigned long huge_page_mask(struct hstate
*h
)
935 static inline unsigned long vma_kernel_pagesize(struct vm_area_struct
*vma
)
940 static inline unsigned long vma_mmu_pagesize(struct vm_area_struct
*vma
)
945 static inline unsigned int huge_page_order(struct hstate
*h
)
950 static inline unsigned int huge_page_shift(struct hstate
*h
)
955 static inline bool hstate_is_gigantic(struct hstate
*h
)
960 static inline unsigned int pages_per_huge_page(struct hstate
*h
)
965 static inline unsigned hstate_index_to_shift(unsigned index
)
970 static inline int hstate_index(struct hstate
*h
)
975 static inline pgoff_t
basepage_index(struct page
*page
)
980 static inline int dissolve_free_huge_page(struct page
*page
)
985 static inline int dissolve_free_huge_pages(unsigned long start_pfn
,
986 unsigned long end_pfn
)
991 static inline bool hugepage_migration_supported(struct hstate
*h
)
996 static inline bool hugepage_movable_supported(struct hstate
*h
)
1001 static inline gfp_t
htlb_alloc_mask(struct hstate
*h
)
1006 static inline gfp_t
htlb_modify_alloc_mask(struct hstate
*h
, gfp_t gfp_mask
)
1011 static inline spinlock_t
*huge_pte_lockptr(struct hstate
*h
,
1012 struct mm_struct
*mm
, pte_t
*pte
)
1014 return &mm
->page_table_lock
;
1017 static inline void hugetlb_report_usage(struct seq_file
*f
, struct mm_struct
*m
)
1021 static inline void hugetlb_count_sub(long l
, struct mm_struct
*mm
)
1025 static inline void set_huge_swap_pte_at(struct mm_struct
*mm
, unsigned long addr
,
1026 pte_t
*ptep
, pte_t pte
, unsigned long sz
)
1029 #endif /* CONFIG_HUGETLB_PAGE */
1031 static inline spinlock_t
*huge_pte_lock(struct hstate
*h
,
1032 struct mm_struct
*mm
, pte_t
*pte
)
1036 ptl
= huge_pte_lockptr(h
, mm
, pte
);
1041 #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
1042 extern void __init
hugetlb_cma_reserve(int order
);
1043 extern void __init
hugetlb_cma_check(void);
1045 static inline __init
void hugetlb_cma_reserve(int order
)
1048 static inline __init
void hugetlb_cma_check(void)
1053 bool want_pmd_share(struct vm_area_struct
*vma
, unsigned long addr
);
1055 #ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE
1057 * ARCHes with special requirements for evicting HUGETLB backing TLB entries can
1060 #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end)
1063 #endif /* _LINUX_HUGETLB_H */