[v2,2/2] MIPS: Add writable-applies-readable policy with pgrot
diff mbox series

Message ID 1591416169-26666-2-git-send-email-maobibo@loongson.cn
State New
Headers show
Series
  • [v2,1/2] MIPS: Set page access bit with pgprot on platforms with RIXI
Related show

Commit Message

maobibo June 6, 2020, 4:02 a.m. UTC
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(-)

Patch
diff mbox series

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);