Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_HUGETLB_H
2#define _LINUX_HUGETLB_H
3
4#ifdef CONFIG_HUGETLB_PAGE
5
6#include <linux/mempolicy.h>
7#include <asm/tlbflush.h>
8
9struct ctl_table;
10
11static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
12{
13 return vma->vm_flags & VM_HUGETLB;
14}
15
16int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
17int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
18int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int);
19void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
20int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
21int hugetlb_report_meminfo(char *);
22int hugetlb_report_node_meminfo(int, char *);
23int is_hugepage_mem_enough(size_t);
24unsigned long hugetlb_total_pages(void);
25struct page *alloc_huge_page(void);
26void free_huge_page(struct page *);
27int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
28 unsigned long address, int write_access);
29
30extern unsigned long max_huge_pages;
31extern const unsigned long hugetlb_zero, hugetlb_infinity;
32extern int sysctl_hugetlb_shm_group;
33
34/* arch callbacks */
35
36pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr);
37pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
38struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
39 int write);
40struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
41 pmd_t *pmd, int write);
42int is_aligned_hugepage_range(unsigned long addr, unsigned long len);
43int pmd_huge(pmd_t pmd);
44
45#ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
46#define is_hugepage_only_range(mm, addr, len) 0
47#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
48 do { } while (0)
49#endif
50
51#ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE
52#define prepare_hugepage_range(addr, len) \
53 is_aligned_hugepage_range(addr, len)
54#else
55int prepare_hugepage_range(unsigned long addr, unsigned long len);
56#endif
57
58#ifndef ARCH_HAS_SETCLEAR_HUGE_PTE
59#define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte)
60#define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep)
61#else
62void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
63 pte_t *ptep, pte_t pte);
64pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
65 pte_t *ptep);
66#endif
67
68#ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK
69#define hugetlb_prefault_arch_hook(mm) do { } while (0)
70#else
71void hugetlb_prefault_arch_hook(struct mm_struct *mm);
72#endif
73
74#else /* !CONFIG_HUGETLB_PAGE */
75
76static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
77{
78 return 0;
79}
80static inline unsigned long hugetlb_total_pages(void)
81{
82 return 0;
83}
84
85#define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; })
86#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
87#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
88#define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
89#define unmap_hugepage_range(vma, start, end) BUG()
90#define is_hugepage_mem_enough(size) 0
91#define hugetlb_report_meminfo(buf) 0
92#define hugetlb_report_node_meminfo(n, buf) 0
93#define follow_huge_pmd(mm, addr, pmd, write) NULL
94#define is_aligned_hugepage_range(addr, len) 0
95#define prepare_hugepage_range(addr, len) (-EINVAL)
96#define pmd_huge(x) 0
97#define is_hugepage_only_range(mm, addr, len) 0
98#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
99 do { } while (0)
100#define alloc_huge_page() ({ NULL; })
101#define free_huge_page(p) ({ (void)(p); BUG(); })
102#define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
103
104#ifndef HPAGE_MASK
105#define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
106#define HPAGE_SIZE PAGE_SIZE
107#endif
108
109#endif /* !CONFIG_HUGETLB_PAGE */
110
111#ifdef CONFIG_HUGETLBFS
112struct hugetlbfs_config {
113 uid_t uid;
114 gid_t gid;
115 umode_t mode;
116 long nr_blocks;
117 long nr_inodes;
118};
119
120struct hugetlbfs_sb_info {
121 long max_blocks; /* blocks allowed */
122 long free_blocks; /* blocks free */
123 long max_inodes; /* inodes allowed */
124 long free_inodes; /* inodes free */
125 spinlock_t stat_lock;
126};
127
128
129struct hugetlbfs_inode_info {
130 struct shared_policy policy;
131 struct inode vfs_inode;
132};
133
134static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
135{
136 return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
137}
138
139static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
140{
141 return sb->s_fs_info;
142}
143
144extern struct file_operations hugetlbfs_file_operations;
145extern struct vm_operations_struct hugetlb_vm_ops;
146struct file *hugetlb_zero_setup(size_t);
147int hugetlb_get_quota(struct address_space *mapping);
148void hugetlb_put_quota(struct address_space *mapping);
149
150static inline int is_file_hugepages(struct file *file)
151{
152 return file->f_op == &hugetlbfs_file_operations;
153}
154
155static inline void set_file_hugepages(struct file *file)
156{
157 file->f_op = &hugetlbfs_file_operations;
158}
159#else /* !CONFIG_HUGETLBFS */
160
161#define is_file_hugepages(file) 0
162#define set_file_hugepages(file) BUG()
163#define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS)
164
165#endif /* !CONFIG_HUGETLBFS */
166
167#endif /* _LINUX_HUGETLB_H */