From patchwork Wed Jan 27 05:21:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 8130571 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D6C929F38B for ; Wed, 27 Jan 2016 05:24:49 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C89A4202FF for ; Wed, 27 Jan 2016 05:24:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EBE1F202F2 for ; Wed, 27 Jan 2016 05:24:47 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aOIZX-0008Ij-UX; Wed, 27 Jan 2016 05:23:15 +0000 Received: from mail-gw2-out.broadcom.com ([216.31.210.63]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aOIYo-0007hl-Dh for linux-arm-kernel@lists.infradead.org; Wed, 27 Jan 2016 05:22:33 +0000 X-IronPort-AV: E=Sophos;i="5.22,353,1449561600"; d="scan'208";a="86526799" Received: from irvexchcas08.broadcom.com (HELO IRVEXCHCAS08.corp.ad.broadcom.com) ([10.9.208.57]) by mail-gw2-out.broadcom.com with ESMTP; 26 Jan 2016 22:04:48 -0800 Received: from IRVEXCHSMTP1.corp.ad.broadcom.com (10.9.207.51) by IRVEXCHCAS08.corp.ad.broadcom.com (10.9.208.57) with Microsoft SMTP Server (TLS) id 14.3.235.1; Tue, 26 Jan 2016 21:22:12 -0800 Received: from mail-irva-13.broadcom.com (10.10.10.20) by IRVEXCHSMTP1.corp.ad.broadcom.com (10.9.207.51) with Microsoft SMTP Server id 14.3.235.1; Tue, 26 Jan 2016 21:22:12 -0800 Received: from anup-HP-Compaq-8100-Elite-CMT-PC.ban.broadcom.com (unknown [10.131.91.107]) by mail-irva-13.broadcom.com (Postfix) with ESMTP id 9C50040FEB; Tue, 26 Jan 2016 21:18:16 -0800 (PST) From: Anup Patel To: Catalin Marinas , Joerg Roedel , Will Deacon , Robin Murphy , Sricharan R , Linux IOMMU , Linux ARM Kernel Subject: [RFC PATCH 6/6] iommu/arm-smmu: Update bindings document for smmu-inst-as-data DT option Date: Wed, 27 Jan 2016 10:51:19 +0530 Message-ID: <1453872079-27140-7-git-send-email-anup.patel@broadcom.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1453872079-27140-1-git-send-email-anup.patel@broadcom.com> References: <1453872079-27140-1-git-send-email-anup.patel@broadcom.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160126_212230_884105_615C6CEA X-CRM114-Status: UNSURE ( 9.09 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -4.2 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Device Tree , Scott Branden , Pawel Moll , Ian Campbell , Ray Jui , Linux Kernel , Vikram Prakash , Rob Herring , BCM Kernel Feedback , Kumar Gala , Anup Patel Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds info about 'smmu-inst-as-data' DT option in ARM SMMUv1/SMMUv2 driver bindings document. Signed-off-by: Anup Patel Reviewed-by: Ray Jui Reviewed-by: Vikram Prakash Reviewed-by: Scott Branden --- Documentation/devicetree/bindings/iommu/arm,smmu.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.txt b/Documentation/devicetree/bindings/iommu/arm,smmu.txt index 7180745..4c4d03e 100644 --- a/Documentation/devicetree/bindings/iommu/arm,smmu.txt +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.txt @@ -49,6 +49,14 @@ conditions. NOTE: this only applies to the SMMU itself, not masters connected upstream of the SMMU. +- smmu-inst-as-data : Treat privilege/unprivilege instruction fetch as + data read for SMMUv2. The SMMU driver by default provides + unprivilege read-write permission in page table entries. + For SMMUv2, privilege instruction fetch from MMU masters + will cause a context fault for unprivilege read-write + pages. To allow both privilege and unprivilege instruction + fetch, we have to forcefully treat it as data read. + - calxeda,smmu-secure-config-access : Enable proper handling of buggy implementations that always use secure access to SMMU configuration registers. In this case non-secure