From patchwork Sat Jun 6 04:02:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: bibo mao X-Patchwork-Id: 11590929 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 990381667 for ; Sat, 6 Jun 2020 04:03:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8245420723 for ; Sat, 6 Jun 2020 04:03:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725996AbgFFEDH (ORCPT ); Sat, 6 Jun 2020 00:03:07 -0400 Received: from mail.loongson.cn ([114.242.206.163]:53236 "EHLO loongson.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725885AbgFFEDG (ORCPT ); Sat, 6 Jun 2020 00:03:06 -0400 Received: from kvm-dev1.localdomain (unknown [10.2.5.134]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9AxJuppFdtebUs+AA--.1078S3; Sat, 06 Jun 2020 12:02:51 +0800 (CST) From: Bibo Mao To: Thomas Bogendoerfer , Andrew Morton , Paul Burton , Jiaxun Yang 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 Message-Id: <1591416169-26666-2-git-send-email-maobibo@loongson.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1591416169-26666-1-git-send-email-maobibo@loongson.cn> References: <1591416169-26666-1-git-send-email-maobibo@loongson.cn> X-CM-TRANSID: AQAAf9AxJuppFdtebUs+AA--.1078S3 X-Coremail-Antispam: 1UD129KBjvJXoW7tr1fJryDXF1xAF4rGr45Wrg_yoW8Gw45pF 9rA343JrWqgFy0yryUuFWrGayUGr4Dta47Jw17WF1xAws8Xw18KF93KF92qryruFsava10 y3WxWr48JayxAFUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9Sb7Iv0xC_tr1lb4IE77IF4wAFF20E14v26ryj6rWUM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI 8067AKxVWUGwA2048vs2IY020Ec7CjxVAFwI0_JFI_Gr1l8cAvFVAK0II2c7xJM28CjxkF 64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW8JVW5JwA2z4x0Y4vE2Ix0cI8IcV CY1x0267AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv 6xkF7I0E14v26r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4 CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvj eVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x0EwIxGrwCFx2IqxV CFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r10 6r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxV WUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG 6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr 1UYxBIdaVFxhVjvjDU0xZFpf9x07jOrcfUUUUU= X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org 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 --- 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);