[PATCH v2 2/2] MIPS: Add writable-applies-readable policy with pgrot
From: Bibo Mao <maobibo@loongson.cn>
Date: 2020-06-06 04:03:08
Also in:
linux-arch, linux-mm, lkml
Subsystem:
mips, the rest · Maintainers:
Thomas Bogendoerfer, Linus Torvalds
On Linux system, writable applies readable privilege in most architectures, this patch adds this policy on MIPS platform where hardware rixi is supported. Signed-off-by: Bibo Mao <maobibo@loongson.cn> --- arch/mips/mm/cache.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index f814e43..dae0617 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c@@ -160,7 +160,7 @@ static inline void setup_protection_map(void) if (cpu_has_rixi) { protection_map[0] = __pgprot(__PC | __PP | __NX | __NR); protection_map[1] = __pgprot(__PC | __PP | __NX | ___R); - protection_map[2] = __pgprot(__PC | __PP | __NX | __NR); + protection_map[2] = __pgprot(__PC | __PP | __NX | ___R); protection_map[3] = __pgprot(__PC | __PP | __NX | ___R); protection_map[4] = __pgprot(__PC | __PP | ___R); protection_map[5] = __pgprot(__PC | __PP | ___R);
@@ -169,7 +169,7 @@ static inline void setup_protection_map(void) protection_map[8] = __pgprot(__PC | __PP | __NX | __NR); protection_map[9] = __pgprot(__PC | __PP | __NX | ___R); - protection_map[10] = __pgprot(__PC | __PP | __NX | ___W | __NR); + protection_map[10] = __pgprot(__PC | __PP | __NX | ___W | ___R); protection_map[11] = __pgprot(__PC | __PP | __NX | ___W | ___R); protection_map[12] = __pgprot(__PC | __PP | ___R); protection_map[13] = __pgprot(__PC | __PP | ___R);
--
1.8.3.1