linux-kernel - [PATCH 5/7] arm64: Add batched version of ptep_modify_prot

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Message-Id: <20250428120414.12101-6-dev.jain@arm.com>
Date: Mon, 28 Apr 2025 17:34:12 +0530
From: Dev Jain <dev.jain@....com>
To: akpm@...ux-foundation.org
Cc: ryan.roberts@....com,
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	Dev Jain <dev.jain@....com>
Subject: [PATCH 5/7] arm64: Add batched version of ptep_modify_prot_commit

Override the generic definition to simply use set_ptes() to map the new
ptes into the pagetable.

Signed-off-by: Dev Jain <dev.jain@....com>
---
 arch/arm64/include/asm/pgtable.h | 5 +++++
 arch/arm64/mm/mmu.c              | 9 ++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 8872ea5f0642..0b13ca38f80c 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -1558,6 +1558,11 @@ extern pte_t modify_prot_start_ptes(struct vm_area_struct *vma,
 				    unsigned long addr, pte_t *ptep,
 				    unsigned int nr);
 
+#define modify_prot_commit_ptes modify_prot_commit_ptes
+extern void modify_prot_commit_ptes(struct vm_area_struct *vma, unsigned long addr,
+				    pte_t *ptep, pte_t old_pte, pte_t pte,
+				    unsigned int nr);
+
 #ifdef CONFIG_ARM64_CONTPTE
 
 /*
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index fe60be8774f4..5f04bcdcd946 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1543,10 +1543,17 @@ pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte
 	return modify_prot_start_ptes(vma, addr, ptep, 1);
 }
 
+void modify_prot_commit_ptes(struct vm_area_struct *vma, unsigned long addr,
+			     pte_t *ptep, pte_t old_pte, pte_t pte,
+			     unsigned int nr)
+{
+	set_ptes(vma->vm_mm, addr, ptep, pte, nr);
+}
+
 void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep,
 			     pte_t old_pte, pte_t pte)
 {
-	set_pte_at(vma->vm_mm, addr, ptep, pte);
+	modify_prot_commit_ptes(vma, addr, ptep, old_pte, pte, 1);
 }
 
 /*
-- 
2.30.2