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[v13,02/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd_set()

Message ID 20250211161404.850215-3-ajd@linux.ibm.com (mailing list archive)
State Handled Elsewhere
Headers show
Series Support page table check on PowerPC | expand

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Commit Message

Andrew Donnellan Feb. 11, 2025, 4:13 p.m. UTC 
From: Rohan McLure <rmclure@linux.ibm.com>

This reverts commit a3b837130b58 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pmd_set").

Reinstate previously unused parameters for the purpose of supporting
powerpc platforms, as many do not encode user/kernel ownership of the
page in the pte, but instead in the address of the access.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
[ajd: rebase on riscv and mm/page_table_check.c changes, remove riscv
commit message comment]
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
---
v13: remove inaccurate comment on riscv in the commit message
---
 arch/arm64/include/asm/pgtable.h |  4 ++--
 arch/riscv/include/asm/pgtable.h |  4 ++--
 arch/x86/include/asm/pgtable.h   |  4 ++--
 include/linux/page_table_check.h | 11 +++++++----
 mm/page_table_check.c            |  3 ++-
 5 files changed, 15 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index f77bbaf3cf7c..0262d9e966f9 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -653,7 +653,7 @@  static inline void __set_pte_at(struct mm_struct *mm,
 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 			      pmd_t *pmdp, pmd_t pmd)
 {
-	page_table_check_pmd_set(mm, pmdp, pmd);
+	page_table_check_pmd_set(mm, addr, pmdp, pmd);
 	return __set_pte_at(mm, addr, (pte_t *)pmdp, pmd_pte(pmd),
 						PMD_SIZE >> PAGE_SHIFT);
 }
@@ -1415,7 +1415,7 @@  static inline void pmdp_set_wrprotect(struct mm_struct *mm,
 static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
 		unsigned long address, pmd_t *pmdp, pmd_t pmd)
 {
-	page_table_check_pmd_set(vma->vm_mm, pmdp, pmd);
+	page_table_check_pmd_set(vma->vm_mm, address, pmdp, pmd);
 	return __pmd(xchg_relaxed(&pmd_val(*pmdp), pmd_val(pmd)));
 }
 #endif
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 1a9f1091bd5c..bd4092b72258 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -771,7 +771,7 @@  static inline pmd_t pmd_mkdevmap(pmd_t pmd)
 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 				pmd_t *pmdp, pmd_t pmd)
 {
-	page_table_check_pmd_set(mm, pmdp, pmd);
+	page_table_check_pmd_set(mm, addr, pmdp, pmd);
 	return __set_pte_at(mm, (pte_t *)pmdp, pmd_pte(pmd));
 }
 
@@ -842,7 +842,7 @@  static inline void pmdp_set_wrprotect(struct mm_struct *mm,
 static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
 				unsigned long address, pmd_t *pmdp, pmd_t pmd)
 {
-	page_table_check_pmd_set(vma->vm_mm, pmdp, pmd);
+	page_table_check_pmd_set(vma->vm_mm, address, pmdp, pmd);
 	return __pmd(atomic_long_xchg((atomic_long_t *)pmdp, pmd_val(pmd)));
 }
 
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index e53674bb3814..366cdb9d75d9 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1280,7 +1280,7 @@  static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp)
 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 			      pmd_t *pmdp, pmd_t pmd)
 {
-	page_table_check_pmd_set(mm, pmdp, pmd);
+	page_table_check_pmd_set(mm, addr, pmdp, pmd);
 	set_pmd(pmdp, pmd);
 }
 
@@ -1425,7 +1425,7 @@  static inline void pmdp_set_wrprotect(struct mm_struct *mm,
 static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
 		unsigned long address, pmd_t *pmdp, pmd_t pmd)
 {
-	page_table_check_pmd_set(vma->vm_mm, pmdp, pmd);
+	page_table_check_pmd_set(vma->vm_mm, address, pmdp, pmd);
 	if (IS_ENABLED(CONFIG_SMP)) {
 		return xchg(pmdp, pmd);
 	} else {
diff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h
index d188428512f5..5855d690c48a 100644
--- a/include/linux/page_table_check.h
+++ b/include/linux/page_table_check.h
@@ -19,7 +19,8 @@  void __page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd);
 void __page_table_check_pud_clear(struct mm_struct *mm, pud_t pud);
 void __page_table_check_ptes_set(struct mm_struct *mm, pte_t *ptep, pte_t pte,
 		unsigned int nr);
-void __page_table_check_pmd_set(struct mm_struct *mm, pmd_t *pmdp, pmd_t pmd);
+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);
 void __page_table_check_pte_clear_range(struct mm_struct *mm,
@@ -75,13 +76,14 @@  static inline void page_table_check_ptes_set(struct mm_struct *mm,
 	__page_table_check_ptes_set(mm, ptep, pte, nr);
 }
 
-static inline void page_table_check_pmd_set(struct mm_struct *mm, pmd_t *pmdp,
+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, pmdp, pmd);
+	__page_table_check_pmd_set(mm, addr, pmdp, pmd);
 }
 
 static inline void page_table_check_pud_set(struct mm_struct *mm,
@@ -131,7 +133,8 @@  static inline void page_table_check_ptes_set(struct mm_struct *mm,
 {
 }
 
-static inline void page_table_check_pmd_set(struct mm_struct *mm, pmd_t *pmdp,
+static inline void page_table_check_pmd_set(struct mm_struct *mm,
+					    unsigned long addr, pmd_t *pmdp,
 					    pmd_t pmd)
 {
 }
diff --git a/mm/page_table_check.c b/mm/page_table_check.c
index f14fef81c61d..099719d6f788 100644
--- a/mm/page_table_check.c
+++ b/mm/page_table_check.c
@@ -234,7 +234,8 @@  static inline void page_table_check_pmd_flags(pmd_t pmd)
 		WARN_ON_ONCE(swap_cached_writable(pmd_to_swp_entry(pmd)));
 }
 
-void __page_table_check_pmd_set(struct mm_struct *mm, pmd_t *pmdp, pmd_t pmd)
+void __page_table_check_pmd_set(struct mm_struct *mm, unsigned long addr,
+				pmd_t *pmdp, pmd_t pmd)
 {
 	if (&init_mm == mm)
 		return;