From patchwork Wed May 17 14:18:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Murzin X-Patchwork-Id: 9731219 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2556E60363 for ; Wed, 17 May 2017 14:21:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 17A77285FD for ; Wed, 17 May 2017 14:21:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0AD01287A5; Wed, 17 May 2017 14:21:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8A973285FD for ; Wed, 17 May 2017 14:21:00 +0000 (UTC) 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=PXRz4w07tMmg41+fkRQl4/B+vdYeUiFHHmuo/Kr73vk=; b=QNJ1f71sFQdktf/ety9V8fZrPB iyg4UIQKsxhHWPDVSv5YYAN0ytvkssgsHxqePwf0T6mmRsYET2sHDXIZTySWw6zMGyJLx46hUbf7V QdLbbpOhA3dDHAFLh+IszKaVd67gZXGRci7TK21Kprz35AX6TBzh4pMCwn4FK6v7g07sfPXIOIAdn R0AHHZUhsBb9bsJ8Q/fYRe+99InWZNZhdTjMEF+We9TGauDpltJY4dU/3ULX3hI5j9ZABO6/dyPzY 3o+U+d8pTT5BOhG6Tf3TdYp1xta/c2LaJqv6YXyJrgFcpFQBRZPpyiEgw+f8yBgiP9nolMF/J0LLX k56KTusg==; 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 1dAzow-0007Mg-Qf; Wed, 17 May 2017 14:20:58 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dAznd-0004Ll-Rp for linux-arm-kernel@lists.infradead.org; Wed, 17 May 2017 14:19:40 +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 655A51682; Wed, 17 May 2017 07:19:18 -0700 (PDT) Received: from bc-a10-1-7.euhpc.arm.com. (bc-a10-1-7.euhpc.arm.com [10.6.3.161]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 2B5F13F23B; Wed, 17 May 2017 07:19:17 -0700 (PDT) From: Vladimir Murzin To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH 4/7] ARM: NOMMU: Disallow MPU for XIP Date: Wed, 17 May 2017 15:18:52 +0100 Message-Id: <1495030735-22078-5-git-send-email-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1495030735-22078-1-git-send-email-vladimir.murzin@arm.com> References: <1495030735-22078-1-git-send-email-vladimir.murzin@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170517_071938_165119_869D91AD X-CRM114-Status: UNSURE ( 7.19 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sza@esh.hu, manabian@gmail.com, linux@armlinux.org.uk, stefan@agner.ch, u.kleine-koenig@pengutronix.de, alexandre.torgue@st.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP It seems that MPU never worked with XIP, so we just disallow such combination. 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