From: Bibo Mao <maobibo@loongson.cn>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Andrew Morton <akpm@linux-foundation.org>,
Paul Burton <paulburton@kernel.org>,
Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH v2 2/2] MIPS: Add writable-applies-readable policy with pgrot
Date: Sat, 6 Jun 2020 12:02:49 +0800 [thread overview]
Message-ID: <1591416169-26666-2-git-send-email-maobibo@loongson.cn> (raw)
In-Reply-To: <1591416169-26666-1-git-send-email-maobibo@loongson.cn>
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
next prev parent reply other threads:[~2020-06-06 4:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-06 4:02 [PATCH v2 1/2] MIPS: Set page access bit with pgprot on platforms with RIXI Bibo Mao
2020-06-06 4:02 ` Bibo Mao [this message]
2020-07-26 8:32 ` Thomas Bogendoerfer
2020-08-25 3:20 ` [PATCH v2 1/2] MIPS: Set page access bit with pgprot on Huang Pei
2020-08-25 3:20 ` [PATCH] MIPS: make userspace mapping young by default Huang Pei
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