From patchwork Tue Jun 13 09:05:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Vladimir Murzin X-Patchwork-Id: 775018 Return-Path: X-Original-To: incoming-imx@patchwork.ozlabs.org Delivered-To: patchwork-incoming-imx@bilbo.ozlabs.org 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 3wn3ms3vggz9ryr for ; Tue, 13 Jun 2017 19:07:09 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="hOfMJU4x"; dkim-atps=neutral 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=k4WRZVonYo/qYY5tMxreK2DReKgF16nBvSW68eogGMw=; b=hOfMJU4xTFmSXB lKnSu/vcezQsQgckP3l1/+EWf2wUPfpnlRk6xTxEve/HSSJ3QFkNa4+3hkyrL6dcXuw1iHEU4UOLp emctNhTmB6Mn4Gdez66/DNvMC9Jsnm/P7jm97UvMmUC2ZzjxWkgjuBmBPOGSb2427S9hf5CtLGU+/ D1jCVRsZt2KmhP0ht79SUouHBLbkuUnyAfTSf5hnWpGKSd71rYcXP1cFgcojECMR5R/U1XwMsYK05 kny13ua6Xy6OsUEY5uPbVbGtFk6jIaU2xWXH2oTJ/bbJhxyZKQRwHKo/YTaPhpA5ugValv4JKQss0 P/a04GJqVpHv/LHLOf0Q==; 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 1dKhn0-0005CQ-MV; Tue, 13 Jun 2017 09:07:06 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dKhlp-0003kv-2q for linux-arm-kernel@lists.infradead.org; Tue, 13 Jun 2017 09:05:55 +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 4540F1610; Tue, 13 Jun 2017 02:05:34 -0700 (PDT) Received: from bc-e9-2-15.euhpc.arm.com. (bc-e9-2-15.euhpc.arm.com [10.6.2.247]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EB2BD3F581; Tue, 13 Jun 2017 02:05:32 -0700 (PDT) From: Vladimir Murzin To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 4/7] ARM: NOMMU: Disallow MPU for XIP Date: Tue, 13 Jun 2017 10:05:04 +0100 Message-Id: <1497344707-14446-5-git-send-email-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1497344707-14446-1-git-send-email-vladimir.murzin@arm.com> References: <1497344707-14446-1-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-20170613_020553_140568_5CDA99CB X-CRM114-Status: UNSURE ( 7.70 ) 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 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -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 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