From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3CFD7C04FF3 for ; Mon, 24 May 2021 12:48:40 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B68E4613AD for ; Mon, 24 May 2021 12:48:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B68E4613AD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 687CF6070D; Mon, 24 May 2021 12:48:39 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uSVTIIFgM-8H; Mon, 24 May 2021 12:48:37 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTP id 44B9760693; Mon, 24 May 2021 12:48:37 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 20769C000D; Mon, 24 May 2021 12:48:37 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138]) by lists.linuxfoundation.org (Postfix) with ESMTP id E531AC0001 for ; Mon, 24 May 2021 12:48:35 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id CB3BA82F4F for ; Mon, 24 May 2021 12:48:35 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Q4UHQfz7TSyk for ; Mon, 24 May 2021 12:48:34 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp1.osuosl.org (Postfix) with ESMTP id E5425833FB for ; Mon, 24 May 2021 12:48:33 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0B1B7113E; Mon, 24 May 2021 05:48:33 -0700 (PDT) Received: from [10.57.73.64] (unknown [10.57.73.64]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 43B153F719; Mon, 24 May 2021 05:48:31 -0700 (PDT) Subject: Re: [PATCH 0/3] iommu/arm-smmu: Qualcomm bootsplash/efifb To: Lee Jones , Will Deacon References: <20191226221709.3844244-1-bjorn.andersson@linaro.org> <20200108091641.GA15147@willie-the-truck> From: Robin Murphy Message-ID: <1a93ede6-7af5-dbc8-f655-8b96afa4a277@arm.com> Date: Mon, 24 May 2021 13:48:25 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-GB Cc: Patrick Daly , linux-arm-msm , open list , iommu@lists.linux-foundation.org, Thierry Reding , Pratik Patel , linux-arm-kernel X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On 2021-05-24 13:03, Lee Jones wrote: > On Wed, 8 Jan 2020 at 09:16, Will Deacon wrote: > >> On Thu, Dec 26, 2019 at 02:17:06PM -0800, Bjorn Andersson wrote: >>> These patches implements the stream mapping inheritance that's necessary >> in >>> order to not hit a security violation as the display hardware looses its >> stream >>> mapping during initialization of arm-smmu in various Qualcomm platforms. >>> >>> This was previously posted as an RFC [1], changes since then involves the >>> rebase and migration of the read-back code to the Qualcomm specific >>> implementation, the mapping is maintained indefinitely - to handle probe >>> deferring clients - and rewritten commit messages. >> >> I don't think we should solve this in a Qualcomm-specific manner. Please >> can >> you take a look at the proposal from Thierry [1] and see whether or not it >> works for you? >> > > Did this or Thierry's solution ever gain traction? > > Or are all the parties still 'solving' this downstream? I think this particular series is what eventually ended up upstream as 07a7f2caaa5a and f9081b8ff593 (plus a couple of tweaks later). Progress is slow on the more general solution, but still happening - I see there was a new version recently which I've not had time to properly look at yet. Robin. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu