[PATCH] LoongArch: Add pgprot_nx() implementation
From: Huacai Chen
Date: Tue Dec 17 2024 - 02:40:03 EST
Commit cca98e9f8b5ebcd964 ("mm: enforce that vmap can't map pages
executable") enforces the W^X protection by not allowing remapping
existing pages as executable. Add LoongArch bits so that LoongArch
can benefit the same protection.
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
---
arch/loongarch/include/asm/pgtable-bits.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/loongarch/include/asm/pgtable-bits.h b/arch/loongarch/include/asm/pgtable-bits.h
index 82cd3a9f094b..45bfc65a0c9f 100644
--- a/arch/loongarch/include/asm/pgtable-bits.h
+++ b/arch/loongarch/include/asm/pgtable-bits.h
@@ -96,6 +96,13 @@
#define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL_SUC)
+#define pgprot_nx pgprot_nx
+
+static inline pgprot_t pgprot_nx(pgprot_t _prot)
+{
+ return __pgprot(pgprot_val(_prot) | _PAGE_NO_EXEC);
+}
+
#define pgprot_noncached pgprot_noncached
static inline pgprot_t pgprot_noncached(pgprot_t _prot)
--
2.43.5