[PATCH v5 15/30] arm64: mask out POIndex when modifying a PTE
From: Joey Gouly <joey.gouly@arm.com>
Date: 2024-08-22 15:12:29
Also in:
kvmarm, linux-fsdevel, linux-kselftest, linux-mm, linuxppc-dev
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> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Anshuman Khandual <redacted> --- arch/arm64/include/asm/pgtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git arch/arm64/include/asm/pgtable.h arch/arm64/include/asm/pgtable.h
index 7a4f5604be3f..1d0f18d30e1e 100644
--- arch/arm64/include/asm/pgtable.h
+++ arch/arm64/include/asm/pgtable.h@@ -1103,7 +1103,8 @@ 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_PRESENT_INVALID | PTE_VALID | PTE_WRITE | - PTE_GP | PTE_ATTRINDX_MASK; + PTE_GP | 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));
--
2.25.1