67 строки
2.4 KiB
C
67 строки
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_PAGEWALK_H
|
|
#define _LINUX_PAGEWALK_H
|
|
|
|
#include <linux/mm.h>
|
|
|
|
struct mm_walk;
|
|
|
|
/**
|
|
* mm_walk_ops - callbacks for walk_page_range
|
|
* @pud_entry: if set, called for each non-empty PUD (2nd-level) entry
|
|
* this handler should only handle pud_trans_huge() puds.
|
|
* the pmd_entry or pte_entry callbacks will be used for
|
|
* regular PUDs.
|
|
* @pmd_entry: if set, called for each non-empty PMD (3rd-level) entry
|
|
* this handler is required to be able to handle
|
|
* pmd_trans_huge() pmds. They may simply choose to
|
|
* split_huge_page() instead of handling it explicitly.
|
|
* @pte_entry: if set, called for each non-empty PTE (4th-level) entry
|
|
* @pte_hole: if set, called for each hole at all levels
|
|
* @hugetlb_entry: if set, called for each hugetlb entry
|
|
* @test_walk: caller specific callback function to determine whether
|
|
* we walk over the current vma or not. Returning 0 means
|
|
* "do page table walk over the current vma", returning
|
|
* a negative value means "abort current page table walk
|
|
* right now" and returning 1 means "skip the current vma"
|
|
*/
|
|
struct mm_walk_ops {
|
|
int (*pud_entry)(pud_t *pud, unsigned long addr,
|
|
unsigned long next, struct mm_walk *walk);
|
|
int (*pmd_entry)(pmd_t *pmd, unsigned long addr,
|
|
unsigned long next, struct mm_walk *walk);
|
|
int (*pte_entry)(pte_t *pte, unsigned long addr,
|
|
unsigned long next, struct mm_walk *walk);
|
|
int (*pte_hole)(unsigned long addr, unsigned long next,
|
|
struct mm_walk *walk);
|
|
int (*hugetlb_entry)(pte_t *pte, unsigned long hmask,
|
|
unsigned long addr, unsigned long next,
|
|
struct mm_walk *walk);
|
|
int (*test_walk)(unsigned long addr, unsigned long next,
|
|
struct mm_walk *walk);
|
|
};
|
|
|
|
/**
|
|
* mm_walk - walk_page_range data
|
|
* @ops: operation to call during the walk
|
|
* @mm: mm_struct representing the target process of page table walk
|
|
* @vma: vma currently walked (NULL if walking outside vmas)
|
|
* @private: private data for callbacks' usage
|
|
*
|
|
* (see the comment on walk_page_range() for more details)
|
|
*/
|
|
struct mm_walk {
|
|
const struct mm_walk_ops *ops;
|
|
struct mm_struct *mm;
|
|
struct vm_area_struct *vma;
|
|
void *private;
|
|
};
|
|
|
|
int walk_page_range(struct mm_struct *mm, unsigned long start,
|
|
unsigned long end, const struct mm_walk_ops *ops,
|
|
void *private);
|
|
int walk_page_vma(struct vm_area_struct *vma, const struct mm_walk_ops *ops,
|
|
void *private);
|
|
|
|
#endif /* _LINUX_PAGEWALK_H */
|