diff mbox series

[v2,10/24] arm64: mask out POIndex when modifying a PTE

Message ID 20231027180850.1068089-11-joey.gouly@arm.com (mailing list archive)
State New, archived
Headers show
Series Permission Overlay Extension | expand

Commit Message

Joey Gouly Oct. 27, 2023, 6:08 p.m. UTC 
When a PTE is modified, the POIndex must be masked off so that it can be modified.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/pgtable.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 7f7d9b1df4e5..6c57ebe8e349 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -820,7 +820,8 @@  static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 	 */
 	const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY |
 			      PTE_PROT_NONE | PTE_VALID | PTE_WRITE | PTE_GP |
-			      PTE_ATTRINDX_MASK;
+			      PTE_ATTRINDX_MASK | PTE_PO_IDX_MASK;
+
 	/* preserve the hardware dirty information */
 	if (pte_hw_dirty(pte))
 		pte = set_pte_bit(pte, __pgprot(PTE_DIRTY));