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Message-Id: <20230710204339.3554919-3-willy@infradead.org>
Date: Mon, 10 Jul 2023 21:43:03 +0100
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
linux-arch@...r.kernel.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...nel.org>,
Pasha Tatashin <pasha.tatashin@...een.com>,
Anshuman Khandual <anshuman.khandual@....com>
Subject: [PATCH v5 02/38] mm: Convert page_table_check_pte_set() to page_table_check_ptes_set()
Tell the page table check how many PTEs & PFNs we want it to check.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Reviewed-by: Mike Rapoport (IBM) <rppt@...nel.org>
Acked-by: Pasha Tatashin <pasha.tatashin@...een.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
---
arch/arm64/include/asm/pgtable.h | 2 +-
arch/riscv/include/asm/pgtable.h | 2 +-
arch/x86/include/asm/pgtable.h | 2 +-
include/linux/page_table_check.h | 14 +++++++-------
mm/page_table_check.c | 14 ++++++++------
5 files changed, 18 insertions(+), 16 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index e8a252e62b12..a44a150e0318 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -348,7 +348,7 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
- page_table_check_pte_set(mm, addr, ptep, pte);
+ page_table_check_ptes_set(mm, addr, ptep, pte, 1);
return __set_pte_at(mm, addr, ptep, pte);
}
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 75970ee2bda2..2137e36595b3 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -499,7 +499,7 @@ static inline void __set_pte_at(struct mm_struct *mm,
static inline void set_pte_at(struct mm_struct *mm,
unsigned long addr, pte_t *ptep, pte_t pteval)
{
- page_table_check_pte_set(mm, addr, ptep, pteval);
+ page_table_check_ptes_set(mm, addr, ptep, pteval, 1);
__set_pte_at(mm, addr, ptep, pteval);
}
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 5700bb337987..c6242bc58a71 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1023,7 +1023,7 @@ static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp)
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
- page_table_check_pte_set(mm, addr, ptep, pte);
+ page_table_check_ptes_set(mm, addr, ptep, pte, 1);
set_pte(ptep, pte);
}
diff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h
index 01e16c7696ec..ba269c7009e4 100644
--- a/include/linux/page_table_check.h
+++ b/include/linux/page_table_check.h
@@ -20,8 +20,8 @@ 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_ptes_set(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte, unsigned int nr);
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,
@@ -73,14 +73,14 @@ static inline void page_table_check_pud_clear(struct mm_struct *mm,
__page_table_check_pud_clear(mm, addr, pud);
}
-static inline void page_table_check_pte_set(struct mm_struct *mm,
+static inline void page_table_check_ptes_set(struct mm_struct *mm,
unsigned long addr, pte_t *ptep,
- pte_t pte)
+ pte_t pte, unsigned int nr)
{
if (static_branch_likely(&page_table_check_disabled))
return;
- __page_table_check_pte_set(mm, addr, ptep, pte);
+ __page_table_check_ptes_set(mm, addr, ptep, pte, nr);
}
static inline void page_table_check_pmd_set(struct mm_struct *mm,
@@ -138,9 +138,9 @@ static inline void page_table_check_pud_clear(struct mm_struct *mm,
{
}
-static inline void page_table_check_pte_set(struct mm_struct *mm,
+static inline void page_table_check_ptes_set(struct mm_struct *mm,
unsigned long addr, pte_t *ptep,
- pte_t pte)
+ pte_t pte, unsigned int nr)
{
}
diff --git a/mm/page_table_check.c b/mm/page_table_check.c
index 93ec7690a0d8..662b3f5d31b4 100644
--- a/mm/page_table_check.c
+++ b/mm/page_table_check.c
@@ -190,20 +190,22 @@ void __page_table_check_pud_clear(struct mm_struct *mm, unsigned long addr,
}
EXPORT_SYMBOL(__page_table_check_pud_clear);
-void __page_table_check_pte_set(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte)
+void __page_table_check_ptes_set(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte, unsigned int nr)
{
+ unsigned int i;
+
if (&init_mm == mm)
return;
- __page_table_check_pte_clear(mm, addr, ptep_get(ptep));
+ for (i = 0; i < nr; i++)
+ __page_table_check_pte_clear(mm, addr, ptep_get(ptep + i));
if (pte_user_accessible_page(pte)) {
- page_table_check_set(mm, addr, pte_pfn(pte),
- PAGE_SIZE >> PAGE_SHIFT,
+ page_table_check_set(mm, addr, pte_pfn(pte), nr,
pte_write(pte));
}
}
-EXPORT_SYMBOL(__page_table_check_pte_set);
+EXPORT_SYMBOL(__page_table_check_ptes_set);
void __page_table_check_pmd_set(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd)
--
2.39.2
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