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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2021, Google LLC.
* Pasha Tatashin <pasha.tatashin@soleen.com>
*/
#ifndef __LINUX_PAGE_TABLE_CHECK_H
#define __LINUX_PAGE_TABLE_CHECK_H
#ifdef CONFIG_PAGE_TABLE_CHECK
#include <linux/jump_label.h>
extern struct static_key_true page_table_check_disabled;
extern struct page_ext_operations page_table_check_ops;
void __page_table_check_zero(struct page *page, unsigned int order);
void __page_table_check_pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t pte);
void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr,
pmd_t pmd);
void __page_table_check_pud_clear(struct mm_struct *mm, unsigned long addr,
pud_t pud);
void __page_table_check_pte_set(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte);
void __page_table_check_pmd_set(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd);
void __page_table_check_pud_set(struct mm_struct *mm, unsigned long addr,
pud_t *pudp, pud_t pud);
static inline void page_table_check_alloc(struct page *page, unsigned int order)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_zero(page, order);
}
static inline void page_table_check_free(struct page *page, unsigned int order)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_zero(page, order);
}
static inline void page_table_check_pte_clear(struct mm_struct *mm,
unsigned long addr, pte_t pte)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_pte_clear(mm, addr, pte);
}
static inline void page_table_check_pmd_clear(struct mm_struct *mm,
unsigned long addr, pmd_t pmd)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_pmd_clear(mm, addr, pmd);
}
static inline void page_table_check_pud_clear(struct mm_struct *mm,
unsigned long addr, pud_t pud)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_pud_clear(mm, addr, pud);
}
static inline void page_table_check_pte_set(struct mm_struct *mm,
unsigned long addr, pte_t *ptep,
pte_t pte)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_pte_set(mm, addr, ptep, pte);
}
static inline void page_table_check_pmd_set(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp,
pmd_t pmd)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_pmd_set(mm, addr, pmdp, pmd);
}
static inline void page_table_check_pud_set(struct mm_struct *mm,
unsigned long addr, pud_t *pudp,
pud_t pud)
{
if (static_branch_likely(&page_table_check_disabled))
return;
__page_table_check_pud_set(mm, addr, pudp, pud);
}
#else
static inline void page_table_check_alloc(struct page *page, unsigned int order)
{
}
static inline void page_table_check_free(struct page *page, unsigned int order)
{
}
static inline void page_table_check_pte_clear(struct mm_struct *mm,
unsigned long addr, pte_t pte)
{
}
static inline void page_table_check_pmd_clear(struct mm_struct *mm,
unsigned long addr, pmd_t pmd)
{
}
static inline void page_table_check_pud_clear(struct mm_struct *mm,
unsigned long addr, pud_t pud)
{
}
static inline void page_table_check_pte_set(struct mm_struct *mm,
unsigned long addr, pte_t *ptep,
pte_t pte)
{
}
static inline void page_table_check_pmd_set(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp,
pmd_t pmd)
{
}
static inline void page_table_check_pud_set(struct mm_struct *mm,
unsigned long addr, pud_t *pudp,
pud_t pud)
{
}
#endif /* CONFIG_PAGE_TABLE_CHECK */
#endif /* __LINUX_PAGE_TABLE_CHECK_H */
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