From patchwork Thu Jul 11 15:02:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory CLEMENT X-Patchwork-Id: 11040261 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D42B46C5 for ; Thu, 11 Jul 2019 15:04:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C2F892856D for ; Thu, 11 Jul 2019 15:04:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B47C9288A6; Thu, 11 Jul 2019 15:04:10 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5E8792856D for ; Thu, 11 Jul 2019 15:04:10 +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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References: List-Owner; bh=XIHjVjsl9FlgE9G4J6H5qu49EBX2MiRhNdIiMu84YoI=; b=K26OcEJhtyFODS qZxdUMdropL1rfpvNXb4HVpO9lTuQhD41I3OSd7whS7ZS4ED6+XHcjwdhTSLbpRNcEobNDqSCXaG7 0LtS9YyWj9Vs84MNcpiyfwkmFoT0IhUmDsJ3UCLyOTJlSeELUWRnYl6awmSSJ5T4cJonlBrzCOTgQ +OvEfdCRd4ZBZJwWCEtZssAjB+FwluBugjbYaimUvFmU/aARDOWd7jA5ADKRSnLVsR2fCb7UCE2iW 0FkE/s7hMLxmMNny1nczvK+4huvyV0B9s6k1NBfTPVwclZnKWtyLxpilJgkQUxU3CvIn63KWomwiH eBkJ/97OP753sg7spJRw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hlacD-0004Nz-PM; Thu, 11 Jul 2019 15:04:09 +0000 Received: from merlin.infradead.org ([2001:8b0:10b:1231::1]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hlac3-0004HU-44 for linux-arm-kernel@bombadil.infradead.org; Thu, 11 Jul 2019 15:03:59 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Z+rdqGtrDP2gNH3YuGneigtYCKwONXwI1ZywEJuPT2Q=; b=C/kX/eoZlwmvlUn1YwOTcKFKhK z2ztisgabCR/vVP41mBx54R5e/FWPtOPPA7Wf7SPo9w+BpjQqBwuaHrn6cRnJQVAf0NqPnWAjLODQ 8BicirH0ItUi7shm6L6P698PEHI2VrUzBVuP6Xzgbds12jNWiOf8E6oPC7noKQxR9X5r3Mq60XoJQ 7/ebL4yCY/Kn4Kfvd2nUQ0BNCNj+i5A3xOsPkuEuUQfw2Y5XX8ZZaKIzVeOxzSYIdhQg3dbYf5fv1 5+xKMyfRkXcGWj2Q3bUd6LZM5ucpM+18tNnbVBOSRuVKaNEeCKPO3Bw1YnwG7fZnxuoMxaBq5wPBC sdMyOM6g==; Received: from relay2-d.mail.gandi.net ([217.70.183.194]) by merlin.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hlac0-0004dM-8i for linux-arm-kernel@lists.infradead.org; Thu, 11 Jul 2019 15:03:57 +0000 X-Originating-IP: 92.137.69.152 Received: from localhost (alyon-656-1-672-152.w92-137.abo.wanadoo.fr [92.137.69.152]) (Authenticated sender: gregory.clement@bootlin.com) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id B75B84000B; Thu, 11 Jul 2019 15:03:06 +0000 (UTC) From: Gregory CLEMENT To: Robin Murphy , Joerg Roedel , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org Subject: [PATCH v2 0/4] Add system mmu support for Armada-806 Date: Thu, 11 Jul 2019 17:02:38 +0200 Message-Id: <20190711150242.25290-1-gregory.clement@bootlin.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Jason Cooper , Andrew Lunn , Antoine Tenart , Catalin Marinas , Gregory CLEMENT , Will Deacon , Maxime Chevallier , Nadav Haklai , Rob Herring , Thomas Petazzoni , =?utf-8?q?Miqu=C3=A8l_Rayn?= =?utf-8?q?al?= , linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth 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 Hello, last year a first version of this series was submitted to add support for IOMMU for AP806, including workaround for accessing ARM SMMU 64bit registers[1]. For the record, AP-806 can't access SMMU registers with 64bit width, this patches split the readq/writeq for 32bit access, due to erratanum #582743. Based on the feedback from Robin Murphy, I also add code ensuring that we won't try to use AArch64 format with 32 bits acces. It was also discussed to not use compatible but propertu to support this workaround. I agree to make this change if needed, but for now I would like to have a feedback on the current code to know if it is acceptable if there is still potential issue. The series was tested on a vanilla v5.1 kernel, and without the series, an USB stick was not detected under QEMU whereas with this series it worked as expected. Greogry [1]: https://lkml.org/lkml/2018/10/15/373 Gregory CLEMENT (1): arm64: dts: marvell: armada-ap806: add smmu support Hanna Hawa (3): iommu/arm-smmu: Introduce wrapper for writeq/readq iommu/arm-smmu: Workaround for Marvell Armada-AP806 SoC erratum #582743 dt-bindings: iommu/arm,smmu: add compatible string for Marvell Documentation/arm64/silicon-errata.txt | 2 + .../devicetree/bindings/iommu/arm,smmu.txt | 1 + arch/arm64/boot/dts/marvell/armada-ap806.dtsi | 17 +++++ drivers/iommu/arm-smmu.c | 74 ++++++++++++++++--- 4 files changed, 83 insertions(+), 11 deletions(-)