From patchwork Mon Sep 25 09:05:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Vladimir Murzin X-Patchwork-Id: 818138 Return-Path: X-Original-To: incoming-imx@patchwork.ozlabs.org Delivered-To: patchwork-incoming-imx@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=65.50.211.133; helo=bombadil.infradead.org; envelope-from=linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dmUAGTiF"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3y0yt13x0Cz9sDB for ; Mon, 25 Sep 2017 19:08:09 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aS9QulGyDs+uEAal9mDLVJZfVyNve4Hqo+n9DUNQSNc=; b=dmUAGTiFqUS61n iXA+ykbLHvO/VgYox6BFpADa8N5r039WJwnZGbyzLAqEaECM1+bSFmWp3EA35IEy71pcKEa7WPhk8 QqNb7cFtJjL4OAWxeX36+HMgY1X3hEy1kFY/y5GPiQTxJ30wcRmLBG+cu2DJLq6KeNRmyCrWbgUCu Cbo2/MHgf03RU3madX8+i2TmiGBIGhrkHvnk72RI6V7AAymJ33ajfkvfveSepi/0FxascHJs4VDde SOcKtlWRkqj8ClPbDBZIW6BBSwuWszFMu+nFqF1BmvlvQcQ+oZ83kQusHCqS70Fd5wt+uIdqyIY3H UpPSi+VanK2nztcvG7ew==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dwPMy-0002pJ-R2; Mon, 25 Sep 2017 09:08:04 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dwPLT-0001N1-IU for linux-arm-kernel@lists.infradead.org; Mon, 25 Sep 2017 09:06:37 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0A521169F; Mon, 25 Sep 2017 02:06:12 -0700 (PDT) Received: from bc-c11-3-12.euhpc.arm.com. (bc-c11-3-12.euhpc.arm.com [10.6.2.250]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7BF8C3F3E1; Mon, 25 Sep 2017 02:06:10 -0700 (PDT) From: Vladimir Murzin To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 4/8] ARM: NOMMU: Disallow MPU for XIP Date: Mon, 25 Sep 2017 10:05:40 +0100 Message-Id: <1506330344-31556-5-git-send-email-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1506330344-31556-1-git-send-email-vladimir.murzin@arm.com> References: <1506330344-31556-1-git-send-email-vladimir.murzin@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170925_020631_930746_8CA03CE3 X-CRM114-Status: UNSURE ( 8.05 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -6.9 (------) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-6.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [217.140.101.70 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexandre.torgue@st.com, manabian@gmail.com, linux@armlinux.org.uk, stefan@agner.ch, kbuild-all@01.org, u.kleine-koenig@pengutronix.de, sza@esh.hu Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org List-Id: linux-imx-kernel.lists.patchwork.ozlabs.org It seems that MPU never worked with XIP, so we just disallow such combination. Tested-by: Szemző András Tested-by: Alexandre TORGUE Signed-off-by: Vladimir Murzin --- arch/arm/Kconfig-nommu | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/Kconfig-nommu b/arch/arm/Kconfig-nommu index b757634..6d18395 100644 --- a/arch/arm/Kconfig-nommu +++ b/arch/arm/Kconfig-nommu @@ -52,7 +52,7 @@ config REMAP_VECTORS_TO_RAM config ARM_MPU bool 'Use the ARM v7 PMSA Compliant MPU' - depends on CPU_V7 + depends on !XIP_KERNEL && CPU_V7 default y help Some ARM systems without an MMU have instead a Memory Protection