202 lines
6.2 KiB
C
202 lines
6.2 KiB
C
#ifndef _LINUX_HUGETLB_H
|
|
#define _LINUX_HUGETLB_H
|
|
|
|
#include <linux/fs.h>
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
|
|
#include <linux/mempolicy.h>
|
|
#include <linux/shm.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
struct ctl_table;
|
|
|
|
static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
|
|
{
|
|
return vma->vm_flags & VM_HUGETLB;
|
|
}
|
|
|
|
int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
|
|
int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
|
|
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, int);
|
|
void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
|
|
void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
|
|
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
|
|
int hugetlb_report_meminfo(char *);
|
|
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, int write_access);
|
|
int hugetlb_reserve_pages(struct inode *inode, long from, long to);
|
|
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
|
|
|
|
extern unsigned long max_huge_pages;
|
|
extern unsigned long hugepages_treat_as_movable;
|
|
extern unsigned long nr_overcommit_huge_pages;
|
|
extern const unsigned long hugetlb_zero, hugetlb_infinity;
|
|
extern int sysctl_hugetlb_shm_group;
|
|
|
|
/* arch callbacks */
|
|
|
|
pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr);
|
|
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);
|
|
int pmd_huge(pmd_t pmd);
|
|
void hugetlb_change_protection(struct vm_area_struct *vma,
|
|
unsigned long address, unsigned long end, pgprot_t newprot);
|
|
|
|
#ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
|
|
#define is_hugepage_only_range(mm, addr, len) 0
|
|
#endif
|
|
|
|
#ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE
|
|
#define hugetlb_free_pgd_range free_pgd_range
|
|
#else
|
|
void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr,
|
|
unsigned long end, unsigned long floor,
|
|
unsigned long ceiling);
|
|
#endif
|
|
|
|
#ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE
|
|
/*
|
|
* If the arch doesn't supply something else, assume that hugepage
|
|
* size aligned regions are ok without further preparation.
|
|
*/
|
|
static inline int prepare_hugepage_range(unsigned long addr, unsigned long len)
|
|
{
|
|
if (len & ~HPAGE_MASK)
|
|
return -EINVAL;
|
|
if (addr & ~HPAGE_MASK)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
#else
|
|
int prepare_hugepage_range(unsigned long addr, unsigned long len);
|
|
#endif
|
|
|
|
#ifndef ARCH_HAS_SETCLEAR_HUGE_PTE
|
|
#define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte)
|
|
#define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep)
|
|
#else
|
|
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, pte_t pte);
|
|
pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep);
|
|
#endif
|
|
|
|
#ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK
|
|
#define hugetlb_prefault_arch_hook(mm) do { } while (0)
|
|
#else
|
|
void hugetlb_prefault_arch_hook(struct mm_struct *mm);
|
|
#endif
|
|
|
|
#else /* !CONFIG_HUGETLB_PAGE */
|
|
|
|
static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
|
|
{
|
|
return 0;
|
|
}
|
|
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) BUG()
|
|
#define hugetlb_report_meminfo(buf) 0
|
|
#define hugetlb_report_node_meminfo(n, buf) 0
|
|
#define follow_huge_pmd(mm, addr, pmd, write) NULL
|
|
#define prepare_hugepage_range(addr,len) (-EINVAL)
|
|
#define pmd_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, write) ({ BUG(); 0; })
|
|
|
|
#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 */
|
|
|
|
#ifdef CONFIG_HUGETLBFS
|
|
struct hugetlbfs_config {
|
|
uid_t uid;
|
|
gid_t gid;
|
|
umode_t mode;
|
|
long nr_blocks;
|
|
long nr_inodes;
|
|
};
|
|
|
|
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 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 struct vm_operations_struct hugetlb_vm_ops;
|
|
struct file *hugetlb_file_setup(const char *name, size_t);
|
|
int hugetlb_get_quota(struct address_space *mapping, long delta);
|
|
void hugetlb_put_quota(struct address_space *mapping, long delta);
|
|
|
|
#define BLOCKS_PER_HUGEPAGE (HPAGE_SIZE / 512)
|
|
|
|
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()
|
|
#define hugetlb_file_setup(name,size) 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 */
|
|
|
|
#endif /* _LINUX_HUGETLB_H */
|