From nobody Mon Feb 9 08:32:30 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 874421D5179 for ; Tue, 17 Dec 2024 07:39:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734421168; cv=none; b=UkejVjAFCuIE29RHbcyJ22q/bV+xeiqVaykw5svTwcTOhnqMfbuD2Y+18Nxg6apzPajdE8VW/NR4+QOxUwI/YPeTa2HPVHF4t7U5MkBr+57TPuez5hAh6q/Q3TroKsHlfZEcPDG8Zl7K1+pEnncEWMf3S5LdIz8zMxlCfpWRXUI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734421168; c=relaxed/simple; bh=FF0k0pW14USJyXZVa625InLmts54SM6uhXD/5HffYxo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=oT4Eqf8ycMQ4qyC/LMOWR04QFIzxqggKhtP9WR36RVwkrmGk5txp6SEtcMqFYv+6Ed89K/iEfm8XkO7TyLGYHuMHVtJlMqJJKp5fc1WmFkqC4dQJi2pr7W7rOQv7XMlav+Q/31/Lebip3wdwrl4E2Zga1fkYmY/HPmtYUCs4+a4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.7]) by gateway (Coremail) with SMTP id _____8DxQK+sKmFn5bFXAA--.16143S3; Tue, 17 Dec 2024 15:39:24 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.68.7]) by front1 (Coremail) with SMTP id qMiowMAxz8eoKmFn0gUAAA--.24S2; Tue, 17 Dec 2024 15:39:22 +0800 (CST) From: Huacai Chen To: Huacai Chen Cc: loongarch@lists.linux.dev, Xuefeng Li , Guo Ren , Xuerui Wang , Jiaxun Yang , linux-kernel@vger.kernel.org, loongson-kernel@lists.loongnix.cn, Huacai Chen Subject: [PATCH] LoongArch: Add pgprot_nx() implementation Date: Tue, 17 Dec 2024 15:39:08 +0800 Message-ID: <20241217073908.3347287-1-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.43.5 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMAxz8eoKmFn0gUAAA--.24S2 X-CM-SenderInfo: hfkh0x5xdftxo6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj9xXoWrtFy3trWxuFy7ZFW5tF1xtFc_yoWDAFX_A3 W7Xaykuw48Ja9rAw1ayF93Jr13Gw48C3ZYqF1ktw47tw1qqws8GFy7W3y3Zr4a9FZ7Zrs0 9rs5tw4rCF13tosvyTuYvTs0mTUanT9S1TB71UUUUjUqnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUbSxYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVW8JVW5JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1ln4kS14v26r1Y6r17M2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12 xvs2x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1q 6rW5McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64 vIr41lc7CjxVAaw2AFwI0_JF0_Jw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_ Jr0_Gr1l4IxYO2xFxVAFwI0_Jrv_JF1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8Gjc xK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0 cI8IcVAFwI0_Gr0_Xr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8V AvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E 14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxUxhiSDUUUU Content-Type: text/plain; charset="utf-8" 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 --- arch/loongarch/include/asm/pgtable-bits.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/loongarch/include/asm/pgtable-bits.h b/arch/loongarch/inc= lude/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 @@ =20 #define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL_SUC) =20 +#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 =20 static inline pgprot_t pgprot_noncached(pgprot_t _prot) --=20 2.43.5