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include/linux/hugetlb.h
9.34 KB
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#ifndef _LINUX_HUGETLB_H #define _LINUX_HUGETLB_H |
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#include <linux/mm_types.h> |
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#include <linux/fs.h> |
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#include <linux/hugetlb_inline.h> |
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struct ctl_table; struct user_struct; |
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#ifdef CONFIG_HUGETLB_PAGE #include <linux/mempolicy.h> |
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#include <linux/shm.h> |
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#include <asm/tlbflush.h> |
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int PageHuge(struct page *page); |
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void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
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int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
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#ifdef CONFIG_NUMA int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); #endif |
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int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
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int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, unsigned int flags); |
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void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long, struct page *); void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long, struct page *); |
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int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
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void hugetlb_report_meminfo(struct seq_file *); |
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int hugetlb_report_node_meminfo(int, char *); |
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unsigned long hugetlb_total_pages(void); |
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int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
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unsigned long address, unsigned int flags); |
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int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
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struct vm_area_struct *vma, |
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vm_flags_t vm_flags); |
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void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
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int dequeue_hwpoisoned_huge_page(struct page *page); |
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void copy_huge_page(struct page *dst, struct page *src); |
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extern unsigned long hugepages_treat_as_movable; |
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extern const unsigned long hugetlb_zero, hugetlb_infinity; extern int sysctl_hugetlb_shm_group; |
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extern struct list_head huge_boot_pages; |
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/* arch callbacks */ |
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pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz); |
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pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
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int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
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struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int write); struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, pmd_t *pmd, int write); |
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struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, pud_t *pud, int write); |
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int pmd_huge(pmd_t pmd); |
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int pud_huge(pud_t pmd); |
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void hugetlb_change_protection(struct vm_area_struct *vma, unsigned long address, unsigned long end, pgprot_t newprot); |
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#else /* !CONFIG_HUGETLB_PAGE */ |
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static inline int PageHuge(struct page *page) { return 0; } |
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static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) { } |
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static inline unsigned long hugetlb_total_pages(void) { return 0; } |
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#define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
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#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
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#define unmap_hugepage_range(vma, start, end, page) BUG() |
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static inline void hugetlb_report_meminfo(struct seq_file *m) { } |
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#define hugetlb_report_node_meminfo(n, buf) 0 #define follow_huge_pmd(mm, addr, pmd, write) NULL |
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#define follow_huge_pud(mm, addr, pud, write) NULL |
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#define prepare_hugepage_range(file, addr, len) (-EINVAL) |
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#define pmd_huge(x) 0 |
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#define pud_huge(x) 0 |
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#define is_hugepage_only_range(mm, addr, len) 0 |
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#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
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#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
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#define huge_pte_offset(mm, address) 0 |
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#define dequeue_hwpoisoned_huge_page(page) 0 |
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static inline void copy_huge_page(struct page *dst, struct page *src) { } |
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#define hugetlb_change_protection(vma, address, end, newprot) |
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#ifndef HPAGE_MASK |
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#define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ #define HPAGE_SIZE PAGE_SIZE |
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#endif #endif /* !CONFIG_HUGETLB_PAGE */ |
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#define HUGETLB_ANON_FILE "anon_hugepage" |
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enum { /* * The file will be used as an shm file so shmfs accounting rules * apply */ HUGETLB_SHMFS_INODE = 1, |
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/* * The file is being created on the internal vfs mount and shmfs * accounting rules do not apply */ HUGETLB_ANONHUGE_INODE = 2, |
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}; |
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#ifdef CONFIG_HUGETLBFS struct hugetlbfs_config { uid_t uid; gid_t gid; umode_t mode; long nr_blocks; long nr_inodes; |
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struct hstate *hstate; |
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}; struct hugetlbfs_sb_info { long max_blocks; /* blocks allowed */ long free_blocks; /* blocks free */ long max_inodes; /* inodes allowed */ long free_inodes; /* inodes free */ spinlock_t stat_lock; |
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struct hstate *hstate; |
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}; struct hugetlbfs_inode_info { struct shared_policy policy; struct inode vfs_inode; }; static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) { return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); } static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) { return sb->s_fs_info; } |
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extern const struct file_operations hugetlbfs_file_operations; |
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extern const struct vm_operations_struct hugetlb_vm_ops; |
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struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
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struct user_struct **user, int creat_flags); |
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int hugetlb_get_quota(struct address_space *mapping, long delta); void hugetlb_put_quota(struct address_space *mapping, long delta); |
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static inline int is_file_hugepages(struct file *file) { |
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if (file->f_op == &hugetlbfs_file_operations) return 1; if (is_file_shm_hugepages(file)) return 1; return 0; |
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} static inline void set_file_hugepages(struct file *file) { file->f_op = &hugetlbfs_file_operations; } #else /* !CONFIG_HUGETLBFS */ |
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#define is_file_hugepages(file) 0 #define set_file_hugepages(file) BUG() |
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static inline struct file *hugetlb_file_setup(const char *name, size_t size, |
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vm_flags_t acctflag, struct user_struct **user, int creat_flags) |
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{ return ERR_PTR(-ENOSYS); } |
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#endif /* !CONFIG_HUGETLBFS */ |
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#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ |
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#ifdef CONFIG_HUGETLB_PAGE |
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#define HSTATE_NAME_LEN 32 |
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/* Defines one hugetlb page size */ struct hstate { |
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int next_nid_to_alloc; int next_nid_to_free; |
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unsigned int order; unsigned long mask; unsigned long max_huge_pages; unsigned long nr_huge_pages; unsigned long free_huge_pages; unsigned long resv_huge_pages; unsigned long surplus_huge_pages; unsigned long nr_overcommit_huge_pages; struct list_head hugepage_freelists[MAX_NUMNODES]; unsigned int nr_huge_pages_node[MAX_NUMNODES]; unsigned int free_huge_pages_node[MAX_NUMNODES]; unsigned int surplus_huge_pages_node[MAX_NUMNODES]; |
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char name[HSTATE_NAME_LEN]; |
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}; |
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struct huge_bootmem_page { struct list_head list; struct hstate *hstate; |
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#ifdef CONFIG_HIGHMEM phys_addr_t phys; #endif |
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}; |
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struct page *alloc_huge_page_node(struct hstate *h, int nid); |
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/* arch callback */ int __init alloc_bootmem_huge_page(struct hstate *h); |
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void __init hugetlb_add_hstate(unsigned order); struct hstate *size_to_hstate(unsigned long size); #ifndef HUGE_MAX_HSTATE #define HUGE_MAX_HSTATE 1 #endif extern struct hstate hstates[HUGE_MAX_HSTATE]; extern unsigned int default_hstate_idx; #define default_hstate (hstates[default_hstate_idx]) |
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static inline struct hstate *hstate_inode(struct inode *i) |
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{ |
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struct hugetlbfs_sb_info *hsb; hsb = HUGETLBFS_SB(i->i_sb); return hsb->hstate; |
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} static inline struct hstate *hstate_file(struct file *f) { |
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return hstate_inode(f->f_dentry->d_inode); |
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} |
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static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
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{ |
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return hstate_file(vma->vm_file); |
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} static inline unsigned long huge_page_size(struct hstate *h) { return (unsigned long)PAGE_SIZE << h->order; } |
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extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
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extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
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static inline unsigned long huge_page_mask(struct hstate *h) { return h->mask; } static inline unsigned int huge_page_order(struct hstate *h) { return h->order; } static inline unsigned huge_page_shift(struct hstate *h) { return h->order + PAGE_SHIFT; } static inline unsigned int pages_per_huge_page(struct hstate *h) { return 1 << h->order; } static inline unsigned int blocks_per_huge_page(struct hstate *h) { return huge_page_size(h) / 512; } #include <asm/hugetlb.h> |
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static inline struct hstate *page_hstate(struct page *page) { return size_to_hstate(PAGE_SIZE << compound_order(page)); } |
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static inline unsigned hstate_index_to_shift(unsigned index) { return hstates[index].order + PAGE_SHIFT; } |
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#else struct hstate {}; |
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#define alloc_huge_page_node(h, nid) NULL |
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#define alloc_bootmem_huge_page(h) NULL |
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#define hstate_file(f) NULL #define hstate_vma(v) NULL #define hstate_inode(i) NULL #define huge_page_size(h) PAGE_SIZE #define huge_page_mask(h) PAGE_MASK |
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#define vma_kernel_pagesize(v) PAGE_SIZE |
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#define vma_mmu_pagesize(v) PAGE_SIZE |
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#define huge_page_order(h) 0 #define huge_page_shift(h) PAGE_SHIFT |
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static inline unsigned int pages_per_huge_page(struct hstate *h) { return 1; } |
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#define hstate_index_to_shift(index) 0 |
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#endif |
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#endif /* _LINUX_HUGETLB_H */ |