1 #ifndef _LINUX_HUGETLB_H 2 #define _LINUX_HUGETLB_H 3 4 #include <linux/fs.h> 5 #include <linux/hugetlb_inline.h> 6 7 struct ctl_table; 8 struct user_struct; 9 10 #ifdef CONFIG_HUGETLB_PAGE 11 12 #include <linux/mempolicy.h> 13 #include <linux/shm.h> 14 #include <asm/tlbflush.h> 15 16 int PageHuge(struct page *page); 17 18 void reset_vma_resv_huge_pages(struct vm_area_struct *vma); 19 int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); 20 int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); 21 int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); 22 23 #ifdef CONFIG_NUMA 24 int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, 25 void __user *, size_t *, loff_t *); 26 #endif 27 28 int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); 29 int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, 30 struct page **, struct vm_area_struct **, 31 unsigned long *, int *, int, unsigned int flags); 32 void unmap_hugepage_range(struct vm_area_struct *, 33 unsigned long, unsigned long, struct page *); 34 void __unmap_hugepage_range(struct vm_area_struct *, 35 unsigned long, unsigned long, struct page *); 36 int hugetlb_prefault(struct address_space *, struct vm_area_struct *); 37 void hugetlb_report_meminfo(struct seq_file *); 38 int hugetlb_report_node_meminfo(int, char *); 39 unsigned long hugetlb_total_pages(void); 40 int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, 41 unsigned long address, unsigned int flags); 42 int hugetlb_reserve_pages(struct inode *inode, long from, long to, 43 struct vm_area_struct *vma, 44 int acctflags); 45 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); 46 int dequeue_hwpoisoned_huge_page(struct page *page); 47 void copy_huge_page(struct page *dst, struct page *src); 48 49 extern unsigned long hugepages_treat_as_movable; 50 extern const unsigned long hugetlb_zero, hugetlb_infinity; 51 extern int sysctl_hugetlb_shm_group; 52 extern struct list_head huge_boot_pages; 53 54 /* arch callbacks */ 55 56 pte_t *huge_pte_alloc(struct mm_struct *mm, 57 unsigned long addr, unsigned long sz); 58 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); 59 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); 60 struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, 61 int write); 62 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, 63 pmd_t *pmd, int write); 64 struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, 65 pud_t *pud, int write); 66 int pmd_huge(pmd_t pmd); 67 int pud_huge(pud_t pmd); 68 void hugetlb_change_protection(struct vm_area_struct *vma, 69 unsigned long address, unsigned long end, pgprot_t newprot); 70 71 #else /* !CONFIG_HUGETLB_PAGE */ 72 73 static inline int PageHuge(struct page *page) 74 { 75 return 0; 76 } 77 78 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) 79 { 80 } 81 82 static inline unsigned long hugetlb_total_pages(void) 83 { 84 return 0; 85 } 86 87 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) 88 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) 89 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) 90 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) 91 #define unmap_hugepage_range(vma, start, end, page) BUG() 92 static inline void hugetlb_report_meminfo(struct seq_file *m) 93 { 94 } 95 #define hugetlb_report_node_meminfo(n, buf) 0 96 #define follow_huge_pmd(mm, addr, pmd, write) NULL 97 #define follow_huge_pud(mm, addr, pud, write) NULL 98 #define prepare_hugepage_range(file, addr, len) (-EINVAL) 99 #define pmd_huge(x) 0 100 #define pud_huge(x) 0 101 #define is_hugepage_only_range(mm, addr, len) 0 102 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) 103 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) 104 #define huge_pte_offset(mm, address) 0 105 #define dequeue_hwpoisoned_huge_page(page) 0 106 static inline void copy_huge_page(struct page *dst, struct page *src) 107 { 108 } 109 110 #define hugetlb_change_protection(vma, address, end, newprot) 111 112 #ifndef HPAGE_MASK 113 #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ 114 #define HPAGE_SIZE PAGE_SIZE 115 #endif 116 117 #endif /* !CONFIG_HUGETLB_PAGE */ 118 119 #define HUGETLB_ANON_FILE "anon_hugepage" 120 121 enum { 122 /* 123 * The file will be used as an shm file so shmfs accounting rules 124 * apply 125 */ 126 HUGETLB_SHMFS_INODE = 1, 127 /* 128 * The file is being created on the internal vfs mount and shmfs 129 * accounting rules do not apply 130 */ 131 HUGETLB_ANONHUGE_INODE = 2, 132 }; 133 134 #ifdef CONFIG_HUGETLBFS 135 struct hugetlbfs_config { 136 uid_t uid; 137 gid_t gid; 138 umode_t mode; 139 long nr_blocks; 140 long nr_inodes; 141 struct hstate *hstate; 142 }; 143 144 struct hugetlbfs_sb_info { 145 long max_blocks; /* blocks allowed */ 146 long free_blocks; /* blocks free */ 147 long max_inodes; /* inodes allowed */ 148 long free_inodes; /* inodes free */ 149 spinlock_t stat_lock; 150 struct hstate *hstate; 151 }; 152 153 154 struct hugetlbfs_inode_info { 155 struct shared_policy policy; 156 struct inode vfs_inode; 157 }; 158 159 static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) 160 { 161 return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); 162 } 163 164 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) 165 { 166 return sb->s_fs_info; 167 } 168 169 extern const struct file_operations hugetlbfs_file_operations; 170 extern const struct vm_operations_struct hugetlb_vm_ops; 171 struct file *hugetlb_file_setup(const char *name, size_t size, int acct, 172 struct user_struct **user, int creat_flags); 173 int hugetlb_get_quota(struct address_space *mapping, long delta); 174 void hugetlb_put_quota(struct address_space *mapping, long delta); 175 176 static inline int is_file_hugepages(struct file *file) 177 { 178 if (file->f_op == &hugetlbfs_file_operations) 179 return 1; 180 if (is_file_shm_hugepages(file)) 181 return 1; 182 183 return 0; 184 } 185 186 static inline void set_file_hugepages(struct file *file) 187 { 188 file->f_op = &hugetlbfs_file_operations; 189 } 190 #else /* !CONFIG_HUGETLBFS */ 191 192 #define is_file_hugepages(file) 0 193 #define set_file_hugepages(file) BUG() 194 static inline struct file *hugetlb_file_setup(const char *name, size_t size, 195 int acctflag, struct user_struct **user, int creat_flags) 196 { 197 return ERR_PTR(-ENOSYS); 198 } 199 200 #endif /* !CONFIG_HUGETLBFS */ 201 202 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA 203 unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, 204 unsigned long len, unsigned long pgoff, 205 unsigned long flags); 206 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ 207 208 #ifdef CONFIG_HUGETLB_PAGE 209 210 #define HSTATE_NAME_LEN 32 211 /* Defines one hugetlb page size */ 212 struct hstate { 213 int next_nid_to_alloc; 214 int next_nid_to_free; 215 unsigned int order; 216 unsigned long mask; 217 unsigned long max_huge_pages; 218 unsigned long nr_huge_pages; 219 unsigned long free_huge_pages; 220 unsigned long resv_huge_pages; 221 unsigned long surplus_huge_pages; 222 unsigned long nr_overcommit_huge_pages; 223 struct list_head hugepage_freelists[MAX_NUMNODES]; 224 unsigned int nr_huge_pages_node[MAX_NUMNODES]; 225 unsigned int free_huge_pages_node[MAX_NUMNODES]; 226 unsigned int surplus_huge_pages_node[MAX_NUMNODES]; 227 char name[HSTATE_NAME_LEN]; 228 }; 229 230 struct huge_bootmem_page { 231 struct list_head list; 232 struct hstate *hstate; 233 }; 234 235 struct page *alloc_huge_page_node(struct hstate *h, int nid); 236 237 /* arch callback */ 238 int __init alloc_bootmem_huge_page(struct hstate *h); 239 240 void __init hugetlb_add_hstate(unsigned order); 241 struct hstate *size_to_hstate(unsigned long size); 242 243 #ifndef HUGE_MAX_HSTATE 244 #define HUGE_MAX_HSTATE 1 245 #endif 246 247 extern struct hstate hstates[HUGE_MAX_HSTATE]; 248 extern unsigned int default_hstate_idx; 249 250 #define default_hstate (hstates[default_hstate_idx]) 251 252 static inline struct hstate *hstate_inode(struct inode *i) 253 { 254 struct hugetlbfs_sb_info *hsb; 255 hsb = HUGETLBFS_SB(i->i_sb); 256 return hsb->hstate; 257 } 258 259 static inline struct hstate *hstate_file(struct file *f) 260 { 261 return hstate_inode(f->f_dentry->d_inode); 262 } 263 264 static inline struct hstate *hstate_vma(struct vm_area_struct *vma) 265 { 266 return hstate_file(vma->vm_file); 267 } 268 269 static inline unsigned long huge_page_size(struct hstate *h) 270 { 271 return (unsigned long)PAGE_SIZE << h->order; 272 } 273 274 extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); 275 276 extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); 277 278 static inline unsigned long huge_page_mask(struct hstate *h) 279 { 280 return h->mask; 281 } 282 283 static inline unsigned int huge_page_order(struct hstate *h) 284 { 285 return h->order; 286 } 287 288 static inline unsigned huge_page_shift(struct hstate *h) 289 { 290 return h->order + PAGE_SHIFT; 291 } 292 293 static inline unsigned int pages_per_huge_page(struct hstate *h) 294 { 295 return 1 << h->order; 296 } 297 298 static inline unsigned int blocks_per_huge_page(struct hstate *h) 299 { 300 return huge_page_size(h) / 512; 301 } 302 303 #include <asm/hugetlb.h> 304 305 static inline struct hstate *page_hstate(struct page *page) 306 { 307 return size_to_hstate(PAGE_SIZE << compound_order(page)); 308 } 309 310 static inline unsigned hstate_index_to_shift(unsigned index) 311 { 312 return hstates[index].order + PAGE_SHIFT; 313 } 314 315 #else 316 struct hstate {}; 317 #define alloc_huge_page_node(h, nid) NULL 318 #define alloc_bootmem_huge_page(h) NULL 319 #define hstate_file(f) NULL 320 #define hstate_vma(v) NULL 321 #define hstate_inode(i) NULL 322 #define huge_page_size(h) PAGE_SIZE 323 #define huge_page_mask(h) PAGE_MASK 324 #define vma_kernel_pagesize(v) PAGE_SIZE 325 #define vma_mmu_pagesize(v) PAGE_SIZE 326 #define huge_page_order(h) 0 327 #define huge_page_shift(h) PAGE_SHIFT 328 static inline unsigned int pages_per_huge_page(struct hstate *h) 329 { 330 return 1; 331 } 332 #define hstate_index_to_shift(index) 0 333 #endif 334 335 #endif /* _LINUX_HUGETLB_H */ 336