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