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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 E1E92C18E5B for ; Tue, 17 Mar 2020 15:52:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B633E20663 for ; Tue, 17 Mar 2020 15:52:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="DJjbqK+M" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726692AbgCQPwm (ORCPT ); Tue, 17 Mar 2020 11:52:42 -0400 Received: from mail26.static.mailgun.info ([104.130.122.26]:30160 "EHLO mail26.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726294AbgCQPwm (ORCPT ); Tue, 17 Mar 2020 11:52:42 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1584460362; h=Message-ID: References: In-Reply-To: Subject: Cc: To: From: Date: Content-Transfer-Encoding: Content-Type: MIME-Version: Sender; bh=F3ioMX8bj8P3wFuntkEmg3te9kA2v3f1KYJgn3TX8No=; b=DJjbqK+MfSvWe/G94I3T9dFIYvYYtCrYtG8QLVi3CjOnmm7WAE3L0WVeTV/zahRkZzNUX1Vh Oum1uZ0sQrno4vgLH9vPJDFZFDaqnnNLd4X0jvGp41MdXtdRBjp1RV9I/iBxU1rpgN5N/0IE vfR2/Bkiyxt0U4B4aRKk0B2gqyI= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e70f236.7f14e17cc0d8-smtp-out-n03; Tue, 17 Mar 2020 15:52:22 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 69A8FC433BA; Tue, 17 Mar 2020 15:52:22 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: sibis) by smtp.codeaurora.org (Postfix) with ESMTPSA id CBA72C433D2; Tue, 17 Mar 2020 15:52:21 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Tue, 17 Mar 2020 21:22:21 +0530 From: Sibi Sankar To: bjorn.andersson@linaro.org, robh+dt@kernel.org, joro@8bytes.org, robin.murphy@arm.com Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, iommu@lists.linux-foundation.org, linux-remoteproc@vger.kernel.org, ohad@wizery.com, agross@kernel.org, dianders@chromium.org, saiprakash.ranjan@codeaurora.org Subject: Re: [PATCH v2 0/3] Request direct mapping for modem device In-Reply-To: <20200317150910.26053-1-sibis@codeaurora.org> References: <20200317150910.26053-1-sibis@codeaurora.org> Message-ID: X-Sender: sibis@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-03-17 20:39, Sibi Sankar wrote: > The Q6 modem sub-system has direct access to DDR through memnoc and > an indirect access routed through a SMMU which MSS CE (crypto engine > sub-component of MSS) uses during out of reset sequence. Request direct > mapping for the modem device since smmu is not expected to provide > access > control/translation for these SIDs (sandboxing of the modem is achieved > through XPUs engaged using SMC calls). This is done on platforms which > don't have TrustZone (which programs the modem SIDs) to prevent the > following global faults seen on Cheza/Trogdor: > > Cheza: > arm-smmu 15000000.iommu: Unexpected global fault, this could be serious > arm-smmu 15000000.iommu: GFSR 0x80000002, GFSYNR0 0x00000000, > GFSYNR1 0x00000781, GFSYNR2 0x00000000 > > Trogdor: > arm-smmu 15000000.iommu: Unexpected global fault, this could be serious > arm-smmu 15000000.iommu: GFSR 0x80000002, GFSYNR0 0x00000000, > GFSYNR1 0x00000461, GFSYNR2 0x00000000 > > V2: > * Request direct mapping from SoC-specific corner of the SMMU > driver [Robin] > * Add iommu property to remoteproc modem node on Cheza > > Depends on: > https://lore.kernel.org/patchwork/cover/1183528/ > > Sibi Sankar (3): > dt-bindings: remoteproc: qcom: Add iommus property > remoteproc: qcom_q6v5_mss: Request direct mapping for modem device iommu: arm-smmu-qcom: Request direct mapping for modem device sry should have been ^^ instead > arm64: dts: qcom: sdm845-cheza: Add iommus property > > Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt | 3 +++ > arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi | 4 ++++ > drivers/iommu/arm-smmu-qcom.c | 6 ++++++ > 3 files changed, 13 insertions(+) -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.