tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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 zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
20void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
21int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
22int hugetlb_report_meminfo(char *);
23int hugetlb_report_node_meminfo(int, char *);
24int is_hugepage_mem_enough(size_t);
25unsigned long hugetlb_total_pages(void);
26struct page *alloc_huge_page(void);
27void free_huge_page(struct page *);
28int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
29 unsigned long address, int write_access);
30
31extern unsigned long max_huge_pages;
32extern const unsigned long hugetlb_zero, hugetlb_infinity;
33extern int sysctl_hugetlb_shm_group;
34
35/* arch callbacks */
36
37pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr);
38pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
39struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
40 int write);
41struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
42 pmd_t *pmd, int write);
43int is_aligned_hugepage_range(unsigned long addr, unsigned long len);
44int pmd_huge(pmd_t pmd);
45
46#ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
47#define is_hugepage_only_range(mm, addr, len) 0
48#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
49 do { } while (0)
50#endif
51
52#ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE
53#define prepare_hugepage_range(addr, len) \
54 is_aligned_hugepage_range(addr, len)
55#else
56int prepare_hugepage_range(unsigned long addr, unsigned long len);
57#endif
58
59#ifndef ARCH_HAS_SETCLEAR_HUGE_PTE
60#define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte)
61#define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep)
62#else
63void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
64 pte_t *ptep, pte_t pte);
65pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
66 pte_t *ptep);
67#endif
68
69#ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK
70#define hugetlb_prefault_arch_hook(mm) do { } while (0)
71#else
72void hugetlb_prefault_arch_hook(struct mm_struct *mm);
73#endif
74
75#else /* !CONFIG_HUGETLB_PAGE */
76
77static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
78{
79 return 0;
80}
81static inline unsigned long hugetlb_total_pages(void)
82{
83 return 0;
84}
85
86#define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; })
87#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
88#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
89#define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
90#define zap_hugepage_range(vma, start, len) BUG()
91#define unmap_hugepage_range(vma, start, end) BUG()
92#define is_hugepage_mem_enough(size) 0
93#define hugetlb_report_meminfo(buf) 0
94#define hugetlb_report_node_meminfo(n, buf) 0
95#define follow_huge_pmd(mm, addr, pmd, write) NULL
96#define is_aligned_hugepage_range(addr, len) 0
97#define prepare_hugepage_range(addr, len) (-EINVAL)
98#define pmd_huge(x) 0
99#define is_hugepage_only_range(mm, addr, len) 0
100#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
101 do { } while (0)
102#define alloc_huge_page() ({ NULL; })
103#define free_huge_page(p) ({ (void)(p); BUG(); })
104#define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
105
106#ifndef HPAGE_MASK
107#define HPAGE_MASK 0 /* Keep the compiler happy */
108#define HPAGE_SIZE 0
109#endif
110
111#endif /* !CONFIG_HUGETLB_PAGE */
112
113#ifdef CONFIG_HUGETLBFS
114struct hugetlbfs_config {
115 uid_t uid;
116 gid_t gid;
117 umode_t mode;
118 long nr_blocks;
119 long nr_inodes;
120};
121
122struct hugetlbfs_sb_info {
123 long max_blocks; /* blocks allowed */
124 long free_blocks; /* blocks free */
125 long max_inodes; /* inodes allowed */
126 long free_inodes; /* inodes free */
127 spinlock_t stat_lock;
128};
129
130
131struct hugetlbfs_inode_info {
132 struct shared_policy policy;
133 struct inode vfs_inode;
134};
135
136static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
137{
138 return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
139}
140
141static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
142{
143 return sb->s_fs_info;
144}
145
146extern struct file_operations hugetlbfs_file_operations;
147extern struct vm_operations_struct hugetlb_vm_ops;
148struct file *hugetlb_zero_setup(size_t);
149int hugetlb_get_quota(struct address_space *mapping);
150void hugetlb_put_quota(struct address_space *mapping);
151
152static inline int is_file_hugepages(struct file *file)
153{
154 return file->f_op == &hugetlbfs_file_operations;
155}
156
157static inline void set_file_hugepages(struct file *file)
158{
159 file->f_op = &hugetlbfs_file_operations;
160}
161#else /* !CONFIG_HUGETLBFS */
162
163#define is_file_hugepages(file) 0
164#define set_file_hugepages(file) BUG()
165#define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS)
166
167#endif /* !CONFIG_HUGETLBFS */
168
169#endif /* _LINUX_HUGETLB_H */