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[v14,01/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pud_set()

Message ID 20250411054354.511145-2-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 April 11, 2025, 5:43 a.m. UTC 
From: Rohan McLure <rmclure@linux.ibm.com>

This reverts commit 6d144436d954 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pud_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 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
v14: fix an x86 usage I missed (found by akpm)
---
 arch/arm64/include/asm/pgtable.h |  2 +-
 arch/riscv/include/asm/pgtable.h |  2 +-
 arch/x86/include/asm/pgtable.h   |  4 ++--
 include/linux/page_table_check.h | 11 +++++++----
 mm/page_table_check.c            |  3 ++-
 5 files changed, 13 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index d3b538be1500..805aec562d07 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -669,7 +669,7 @@  static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 static inline void set_pud_at(struct mm_struct *mm, unsigned long addr,
 			      pud_t *pudp, pud_t pud)
 {
-	page_table_check_pud_set(mm, pudp, pud);
+	page_table_check_pud_set(mm, addr, pudp, pud);
 	return __set_pte_at(mm, addr, (pte_t *)pudp, pud_pte(pud),
 						PUD_SIZE >> PAGE_SHIFT);
 }
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 428e48e5f57d..56e6ad5179c9 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -831,7 +831,7 @@  static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 static inline void set_pud_at(struct mm_struct *mm, unsigned long addr,
 				pud_t *pudp, pud_t pud)
 {
-	page_table_check_pud_set(mm, pudp, pud);
+	page_table_check_pud_set(mm, addr, pudp, pud);
 	return __set_pte_at(mm, (pte_t *)pudp, pud_pte(pud));
 }
 
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 7bd6bd6df4a1..d1ed35779948 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1287,7 +1287,7 @@  static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 static inline void set_pud_at(struct mm_struct *mm, unsigned long addr,
 			      pud_t *pudp, pud_t pud)
 {
-	page_table_check_pud_set(mm, pudp, pud);
+	page_table_check_pud_set(mm, addr, pudp, pud);
 	native_set_pud(pudp, pud);
 }
 
@@ -1440,7 +1440,7 @@  static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
 static inline pud_t pudp_establish(struct vm_area_struct *vma,
 		unsigned long address, pud_t *pudp, pud_t pud)
 {
-	page_table_check_pud_set(vma->vm_mm, pudp, pud);
+	page_table_check_pud_set(vma->vm_mm, address, pudp, pud);
 	if (IS_ENABLED(CONFIG_SMP)) {
 		return xchg(pudp, pud);
 	} else {
diff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h
index 6722941c7cb8..d188428512f5 100644
--- a/include/linux/page_table_check.h
+++ b/include/linux/page_table_check.h
@@ -20,7 +20,8 @@  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_pud_set(struct mm_struct *mm, pud_t *pudp, pud_t pud);
+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,
 					unsigned long addr,
 					pmd_t pmd);
@@ -83,13 +84,14 @@  static inline void page_table_check_pmd_set(struct mm_struct *mm, pmd_t *pmdp,
 	__page_table_check_pmd_set(mm, pmdp, pmd);
 }
 
-static inline void page_table_check_pud_set(struct mm_struct *mm, pud_t *pudp,
+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, pudp, pud);
+	__page_table_check_pud_set(mm, addr, pudp, pud);
 }
 
 static inline void page_table_check_pte_clear_range(struct mm_struct *mm,
@@ -134,7 +136,8 @@  static inline void page_table_check_pmd_set(struct mm_struct *mm, pmd_t *pmdp,
 {
 }
 
-static inline void page_table_check_pud_set(struct mm_struct *mm, pud_t *pudp,
+static inline void page_table_check_pud_set(struct mm_struct *mm,
+					    unsigned long addr, pud_t *pudp,
 					    pud_t pud)
 {
 }
diff --git a/mm/page_table_check.c b/mm/page_table_check.c
index 68109ee93841..893555860d91 100644
--- a/mm/page_table_check.c
+++ b/mm/page_table_check.c
@@ -233,7 +233,8 @@  void __page_table_check_pmd_set(struct mm_struct *mm, pmd_t *pmdp, pmd_t pmd)
 }
 EXPORT_SYMBOL(__page_table_check_pmd_set);
 
-void __page_table_check_pud_set(struct mm_struct *mm, pud_t *pudp, pud_t pud)
+void __page_table_check_pud_set(struct mm_struct *mm, unsigned long addr,
+				pud_t *pudp, pud_t pud)
 {
 	if (&init_mm == mm)
 		return;