diff options
Diffstat (limited to 'include/linux/hugetlb.h')
| -rw-r--r-- | include/linux/hugetlb.h | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h new file mode 100644 index 00000000..59225ef2 --- /dev/null +++ b/include/linux/hugetlb.h @@ -0,0 +1,336 @@ +#ifndef _LINUX_HUGETLB_H +#define _LINUX_HUGETLB_H + +#include <linux/mm_types.h> +#include <linux/fs.h> +#include <linux/hugetlb_inline.h> + +struct ctl_table; +struct user_struct; + +#ifdef CONFIG_HUGETLB_PAGE + +#include <linux/mempolicy.h> +#include <linux/shm.h> +#include <asm/tlbflush.h> + +int PageHuge(struct page *page); + +void reset_vma_resv_huge_pages(struct vm_area_struct *vma); +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 *); + +#ifdef CONFIG_NUMA +int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, + void __user *, size_t *, loff_t *); +#endif + +int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); +int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, + struct page **, struct vm_area_struct **, + unsigned long *, int *, int, unsigned int flags); +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 *); +int hugetlb_prefault(struct address_space *, struct vm_area_struct *); +void hugetlb_report_meminfo(struct seq_file *); +int hugetlb_report_node_meminfo(int, char *); +unsigned long hugetlb_total_pages(void); +int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, + unsigned long address, unsigned int flags); +int hugetlb_reserve_pages(struct inode *inode, long from, long to, + struct vm_area_struct *vma, + vm_flags_t vm_flags); +void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); +int dequeue_hwpoisoned_huge_page(struct page *page); +void copy_huge_page(struct page *dst, struct page *src); + +extern unsigned long hugepages_treat_as_movable; +extern const unsigned long hugetlb_zero, hugetlb_infinity; +extern int sysctl_hugetlb_shm_group; +extern struct list_head huge_boot_pages; + +/* arch callbacks */ + +pte_t *huge_pte_alloc(struct mm_struct *mm, + unsigned long addr, unsigned long sz); +pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); +int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); +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); +struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, + pud_t *pud, int write); +int pmd_huge(pmd_t pmd); +int pud_huge(pud_t pmd); +void hugetlb_change_protection(struct vm_area_struct *vma, + unsigned long address, unsigned long end, pgprot_t newprot); + +#else /* !CONFIG_HUGETLB_PAGE */ + +static inline int PageHuge(struct page *page) +{ + return 0; +} + +static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) +{ +} + +static inline unsigned long hugetlb_total_pages(void) +{ + return 0; +} + +#define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) +#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; }) +#define unmap_hugepage_range(vma, start, end, page) BUG() +static inline void hugetlb_report_meminfo(struct seq_file *m) +{ +} +#define hugetlb_report_node_meminfo(n, buf) 0 +#define follow_huge_pmd(mm, addr, pmd, write) NULL +#define follow_huge_pud(mm, addr, pud, write) NULL +#define prepare_hugepage_range(file, addr, len) (-EINVAL) +#define pmd_huge(x) 0 +#define pud_huge(x) 0 +#define is_hugepage_only_range(mm, addr, len) 0 +#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) +#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) +#define huge_pte_offset(mm, address) 0 +#define dequeue_hwpoisoned_huge_page(page) 0 +static inline void copy_huge_page(struct page *dst, struct page *src) +{ +} + +#define hugetlb_change_protection(vma, address, end, newprot) + +#ifndef HPAGE_MASK +#define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ +#define HPAGE_SIZE PAGE_SIZE +#endif + +#endif /* !CONFIG_HUGETLB_PAGE */ + +#define HUGETLB_ANON_FILE "anon_hugepage" + +enum { + /* + * The file will be used as an shm file so shmfs accounting rules + * apply + */ + HUGETLB_SHMFS_INODE = 1, + /* + * The file is being created on the internal vfs mount and shmfs + * accounting rules do not apply + */ + HUGETLB_ANONHUGE_INODE = 2, +}; + +#ifdef CONFIG_HUGETLBFS +struct hugetlbfs_config { + uid_t uid; + gid_t gid; + umode_t mode; + long nr_blocks; + long nr_inodes; + struct hstate *hstate; +}; + +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; + struct hstate *hstate; +}; + + +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; +} + +extern const struct file_operations hugetlbfs_file_operations; +extern const struct vm_operations_struct hugetlb_vm_ops; +struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, + struct user_struct **user, int creat_flags); +int hugetlb_get_quota(struct address_space *mapping, long delta); +void hugetlb_put_quota(struct address_space *mapping, long delta); + +static inline int is_file_hugepages(struct file *file) +{ + if (file->f_op == &hugetlbfs_file_operations) + return 1; + if (is_file_shm_hugepages(file)) + return 1; + + return 0; +} + +static inline void set_file_hugepages(struct file *file) +{ + file->f_op = &hugetlbfs_file_operations; +} +#else /* !CONFIG_HUGETLBFS */ + +#define is_file_hugepages(file) 0 +#define set_file_hugepages(file) BUG() +static inline struct file *hugetlb_file_setup(const char *name, size_t size, + vm_flags_t acctflag, struct user_struct **user, int creat_flags) +{ + return ERR_PTR(-ENOSYS); +} + +#endif /* !CONFIG_HUGETLBFS */ + +#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 */ + +#ifdef CONFIG_HUGETLB_PAGE + +#define HSTATE_NAME_LEN 32 +/* Defines one hugetlb page size */ +struct hstate { + int next_nid_to_alloc; + int next_nid_to_free; + 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]; + char name[HSTATE_NAME_LEN]; +}; + +struct huge_bootmem_page { + struct list_head list; + struct hstate *hstate; +}; + +struct page *alloc_huge_page_node(struct hstate *h, int nid); + +/* arch callback */ +int __init alloc_bootmem_huge_page(struct hstate *h); + +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]) + +static inline struct hstate *hstate_inode(struct inode *i) +{ + struct hugetlbfs_sb_info *hsb; + hsb = HUGETLBFS_SB(i->i_sb); + return hsb->hstate; +} + +static inline struct hstate *hstate_file(struct file *f) +{ + return hstate_inode(f->f_dentry->d_inode); +} + +static inline struct hstate *hstate_vma(struct vm_area_struct *vma) +{ + return hstate_file(vma->vm_file); +} + +static inline unsigned long huge_page_size(struct hstate *h) +{ + return (unsigned long)PAGE_SIZE << h->order; +} + +extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); + +extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); + +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> + +static inline struct hstate *page_hstate(struct page *page) +{ + return size_to_hstate(PAGE_SIZE << compound_order(page)); +} + +static inline unsigned hstate_index_to_shift(unsigned index) +{ + return hstates[index].order + PAGE_SHIFT; +} + +#else +struct hstate {}; +#define alloc_huge_page_node(h, nid) NULL +#define alloc_bootmem_huge_page(h) NULL +#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 +#define vma_kernel_pagesize(v) PAGE_SIZE +#define vma_mmu_pagesize(v) PAGE_SIZE +#define huge_page_order(h) 0 +#define huge_page_shift(h) PAGE_SHIFT +static inline unsigned int pages_per_huge_page(struct hstate *h) +{ + return 1; +} +#define hstate_index_to_shift(index) 0 +#endif + +#endif /* _LINUX_HUGETLB_H */ |