From nobody Mon Feb 9 22:24:21 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1605823126; cv=none; d=zohomail.com; s=zohoarc; b=lfF4ILk/cZoZ8g1vnqD5cDoii2gpNLleVsxqR7iia1Ol55w9PTN16QNFu4R62N54kl7L/2UAKFl7MyIzAUhVK1w6z2YNquZuLXJxR1lDFrL8a+/3r/XkPa5g+1wgq0xynY9VTmXBLyPTGXkcs1caVz1m9WXl9pm1xEZB3PWfcI4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1605823126; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=ZiwH0dK+VVu6UtQJw9p4MqrlmBuqaVE13BH2luYxZGk=; b=T3y2zy/MV6CjYv4sL1XsdxPPeG1fyZpGBrxV6Kkj9tiUKNTIDJf85O0yL5DXPp061SGliIuCH331eQWQwxkgxFuc+ak3fnkAWTE6JBsMHd6hePGHhjfzFX9lWZViiunyxXyYR4Z/z/yaOsivyRbi4kJapS35jocW9I7HF0mHqwQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1605823126773817.1389263967412; Thu, 19 Nov 2020 13:58:46 -0800 (PST) Received: from localhost ([::1]:46056 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kfrwy-0002UQ-9f for importer@patchew.org; Thu, 19 Nov 2020 16:58:44 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51006) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kfruj-0000X5-Fd for qemu-devel@nongnu.org; Thu, 19 Nov 2020 16:56:25 -0500 Received: from mail-wr1-x441.google.com ([2a00:1450:4864:20::441]:42540) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kfruh-00046i-Rb for qemu-devel@nongnu.org; Thu, 19 Nov 2020 16:56:25 -0500 Received: by mail-wr1-x441.google.com with SMTP id l1so7973129wrb.9 for ; Thu, 19 Nov 2020 13:56:23 -0800 (PST) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [81.2.115.148]) by smtp.gmail.com with ESMTPSA id j15sm1934851wrm.62.2020.11.19.13.56.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Nov 2020 13:56:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=ZiwH0dK+VVu6UtQJw9p4MqrlmBuqaVE13BH2luYxZGk=; b=jN0O4zfSV09LrhoUHY2/AcM5y09yCegdaR5fy5I2uyf/2rHTksoyaSLAEOOQs+W8Zq BeltieDBmjmoRIjf47RoiCAtT2SWgSrWv4PYiZoZ7EoaWz60GuwIBF/8pCqy5eHcqzTY EN+ScJc2qXVe8VDpuGA6+bLaFcx6ilIl0Nhu452DG87g+sEJEtMWhHuiqCIHGw+Yy0ci wQ28INoPPZfIvYz5CdQu1ajlsdTexWdlCfZb+rjGGmmt74PBCCc9OLRcj+svSWVCv/T6 ADaudts52w5ri7rCndZanw8bAKzfORRGg4t4EBik8thVb6WLk51DH0b8Hfb1QBYXZSlk nNeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ZiwH0dK+VVu6UtQJw9p4MqrlmBuqaVE13BH2luYxZGk=; b=jp2HEEY9dlX/yq2d3Te8InB5Yur90W6gEnoX1aANdNoCyZ1OIwrIL1BPT0rsxIQDdb MgawuA9Dci9S/x/KoBbAwXHHsZP9VZ8v8g/Ebt3uiRHDbKYbw+SEWMm4LYFHTEvF3wqE vTdzgtRzOOkDaRnx1caOHlp0eX9d3jnN9U+hLIockstiz3j5Kptjt2rFtDAFu1SFzfUR lWhXisROHPvJ3+HneC/I19Tg5jD4rw/xj5DxoJA2WpFDwUzAlV2GCnZWp6YhNzZNKEIh pt4/c+C4Ssh6ETHcYcxwDMW7deOSlpi+ehaZNCoDFDOftLiw3nAIPhUFy4WFxwZvh2b6 Rq3g== X-Gm-Message-State: AOAM533HsnYrQs8ryRYpKQXZB2Zcr1iH5kN+AH/mm7ImqoGTkIyVG810 nXVmS5oYwC8VuyKvNw+Qpns2KQ== X-Google-Smtp-Source: ABdhPJxTc3yQgatgZPYYHQ80jT3c+9LAJdlB0U0Q9HQ4koAxyOdBq6nR9vNUjWZb0RTDyZ1ulvm7TA== X-Received: by 2002:a5d:5689:: with SMTP id f9mr11959050wrv.181.1605822982568; Thu, 19 Nov 2020 13:56:22 -0800 (PST) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH v2 02/28] target/arm: Implement v8.1M PXN extension Date: Thu, 19 Nov 2020 21:55:51 +0000 Message-Id: <20201119215617.29887-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201119215617.29887-1-peter.maydell@linaro.org> References: <20201119215617.29887-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::441; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x441.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" In v8.1M the PXN architecture extension adds a new PXN bit to the MPU_RLAR registers, which forbids execution of code in the region from a privileged mode. This is another feature which is just in the generic "in v8.1M" set and has no ID register field indicating its presence. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson --- target/arm/helper.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/target/arm/helper.c b/target/arm/helper.c index 11b0803df72..abc470d9f17 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -11754,6 +11754,11 @@ bool pmsav8_mpu_lookup(CPUARMState *env, uint32_t = address, } else { uint32_t ap =3D extract32(env->pmsav8.rbar[secure][matchregion], 1= , 2); uint32_t xn =3D extract32(env->pmsav8.rbar[secure][matchregion], 0= , 1); + bool pxn =3D false; + + if (arm_feature(env, ARM_FEATURE_V8_1M)) { + pxn =3D extract32(env->pmsav8.rlar[secure][matchregion], 4, 1); + } =20 if (m_is_system_region(env, address)) { /* System space is always execute never */ @@ -11761,7 +11766,7 @@ bool pmsav8_mpu_lookup(CPUARMState *env, uint32_t a= ddress, } =20 *prot =3D simple_ap_to_rw_prot(env, mmu_idx, ap); - if (*prot && !xn) { + if (*prot && !xn && !(pxn && !is_user)) { *prot |=3D PAGE_EXEC; } /* We don't need to look the attribute up in the MAIR0/MAIR1 --=20 2.20.1