1 #ifndef _LINUX_HUGETLB_H
2 #define _LINUX_HUGETLB_H
4 #ifdef CONFIG_HUGETLB_PAGE
6 #include <linux/mempolicy.h>
7 #include <asm/tlbflush.h>
11 static inline int is_vm_hugetlb_page(struct vm_area_struct
*vma
)
13 return vma
->vm_flags
& VM_HUGETLB
;
16 int hugetlb_sysctl_handler(struct ctl_table
*, int, struct file
*, void __user
*, size_t *, loff_t
*);
17 int copy_hugetlb_page_range(struct mm_struct
*, struct mm_struct
*, struct vm_area_struct
*);
18 int follow_hugetlb_page(struct mm_struct
*, struct vm_area_struct
*, struct page
**, struct vm_area_struct
**, unsigned long *, int *, int);
19 void unmap_hugepage_range(struct vm_area_struct
*, unsigned long, unsigned long);
20 void __unmap_hugepage_range(struct vm_area_struct
*, unsigned long, unsigned long);
21 int hugetlb_prefault(struct address_space
*, struct vm_area_struct
*);
22 int hugetlb_report_meminfo(char *);
23 int hugetlb_report_node_meminfo(int, char *);
24 unsigned long hugetlb_total_pages(void);
25 int hugetlb_fault(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
26 unsigned long address
, int write_access
);
27 int hugetlb_reserve_pages(struct inode
*inode
, long from
, long to
);
28 void hugetlb_unreserve_pages(struct inode
*inode
, long offset
, long freed
);
30 extern unsigned long max_huge_pages
;
31 extern const unsigned long hugetlb_zero
, hugetlb_infinity
;
32 extern int sysctl_hugetlb_shm_group
;
36 pte_t
*huge_pte_alloc(struct mm_struct
*mm
, unsigned long addr
);
37 pte_t
*huge_pte_offset(struct mm_struct
*mm
, unsigned long addr
);
38 int huge_pmd_unshare(struct mm_struct
*mm
, unsigned long *addr
, pte_t
*ptep
);
39 struct page
*follow_huge_addr(struct mm_struct
*mm
, unsigned long address
,
41 struct page
*follow_huge_pmd(struct mm_struct
*mm
, unsigned long address
,
42 pmd_t
*pmd
, int write
);
43 int pmd_huge(pmd_t pmd
);
44 void hugetlb_change_protection(struct vm_area_struct
*vma
,
45 unsigned long address
, unsigned long end
, pgprot_t newprot
);
47 #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
48 #define is_hugepage_only_range(mm, addr, len) 0
51 #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE
52 #define hugetlb_free_pgd_range free_pgd_range
54 void hugetlb_free_pgd_range(struct mmu_gather
**tlb
, unsigned long addr
,
55 unsigned long end
, unsigned long floor
,
56 unsigned long ceiling
);
59 #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE
61 * If the arch doesn't supply something else, assume that hugepage
62 * size aligned regions are ok without further preparation.
64 static inline int prepare_hugepage_range(unsigned long addr
, unsigned long len
,
67 if (pgoff
& (~HPAGE_MASK
>> PAGE_SHIFT
))
69 if (len
& ~HPAGE_MASK
)
71 if (addr
& ~HPAGE_MASK
)
76 int prepare_hugepage_range(unsigned long addr
, unsigned long len
,
80 #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE
81 #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte)
82 #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep)
84 void set_huge_pte_at(struct mm_struct
*mm
, unsigned long addr
,
85 pte_t
*ptep
, pte_t pte
);
86 pte_t
huge_ptep_get_and_clear(struct mm_struct
*mm
, unsigned long addr
,
90 #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK
91 #define hugetlb_prefault_arch_hook(mm) do { } while (0)
93 void hugetlb_prefault_arch_hook(struct mm_struct
*mm
);
96 #else /* !CONFIG_HUGETLB_PAGE */
98 static inline int is_vm_hugetlb_page(struct vm_area_struct
*vma
)
102 static inline unsigned long hugetlb_total_pages(void)
107 #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; })
108 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
109 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
110 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
111 #define unmap_hugepage_range(vma, start, end) BUG()
112 #define hugetlb_report_meminfo(buf) 0
113 #define hugetlb_report_node_meminfo(n, buf) 0
114 #define follow_huge_pmd(mm, addr, pmd, write) NULL
115 #define prepare_hugepage_range(addr,len,pgoff) (-EINVAL)
116 #define pmd_huge(x) 0
117 #define is_hugepage_only_range(mm, addr, len) 0
118 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
119 #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
121 #define hugetlb_change_protection(vma, address, end, newprot)
124 #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
125 #define HPAGE_SIZE PAGE_SIZE
128 #endif /* !CONFIG_HUGETLB_PAGE */
130 #ifdef CONFIG_HUGETLBFS
131 struct hugetlbfs_config
{
139 struct hugetlbfs_sb_info
{
140 long max_blocks
; /* blocks allowed */
141 long free_blocks
; /* blocks free */
142 long max_inodes
; /* inodes allowed */
143 long free_inodes
; /* inodes free */
144 spinlock_t stat_lock
;
148 struct hugetlbfs_inode_info
{
149 struct shared_policy policy
;
150 struct inode vfs_inode
;
153 static inline struct hugetlbfs_inode_info
*HUGETLBFS_I(struct inode
*inode
)
155 return container_of(inode
, struct hugetlbfs_inode_info
, vfs_inode
);
158 static inline struct hugetlbfs_sb_info
*HUGETLBFS_SB(struct super_block
*sb
)
160 return sb
->s_fs_info
;
163 extern const struct file_operations hugetlbfs_file_operations
;
164 extern struct vm_operations_struct hugetlb_vm_ops
;
165 struct file
*hugetlb_zero_setup(size_t);
166 int hugetlb_get_quota(struct address_space
*mapping
);
167 void hugetlb_put_quota(struct address_space
*mapping
);
169 static inline int is_file_hugepages(struct file
*file
)
171 return file
->f_op
== &hugetlbfs_file_operations
;
174 static inline void set_file_hugepages(struct file
*file
)
176 file
->f_op
= &hugetlbfs_file_operations
;
178 #else /* !CONFIG_HUGETLBFS */
180 #define is_file_hugepages(file) 0
181 #define set_file_hugepages(file) BUG()
182 #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS)
184 #endif /* !CONFIG_HUGETLBFS */
186 #endif /* _LINUX_HUGETLB_H */