From: Huacai Chen <chenhuacai@loongson.cn>
Date: Sat, 25 Jan 2025 10:51:42 +0000 (+0800)
Subject: LoongArch: Add pgprot_nx() implementation
X-Git-Tag: v6.14-rc1~61^2~6
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=0816b2ea18284e2598faec024a4df6a93591bd17;p=linux-block.git

LoongArch: Add pgprot_nx() implementation

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@loongson.cn>
---

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)