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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34EA5EB64D7 for ; Sun, 18 Jun 2023 08:07:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229545AbjFRIH5 (ORCPT ); Sun, 18 Jun 2023 04:07:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229456AbjFRIHy (ORCPT ); Sun, 18 Jun 2023 04:07:54 -0400 Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com [IPv6:2a00:1450:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DEA80E6A for ; Sun, 18 Jun 2023 01:07:52 -0700 (PDT) Received: by mail-ej1-x631.google.com with SMTP id a640c23a62f3a-977e0fbd742so327504066b.2 for ; Sun, 18 Jun 2023 01:07:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1687075671; x=1689667671; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=83Nn/kApjqMqR5Y+eBpYu2YO03PvXgyqsQgNeKs9ERs=; b=qXmtLTMeaNyTrIbn+548Mj5DoAdBX6VKfAhSux/803cNvj1mkf2XeClqWtQ4Jnj1b9 f0Ivs4xK34vtrxttfs6gqB1TK0Q9BzmajrXk9XIGTnVHfswpvjq/9z4ZrYMYISdrIZVU FKhojUr415St4/7Q8AObHIjWKyHWn35gNvrvOYvp9KIQ1e4jYmMgDTyhfT/QP1wVaog3 0AiI3GnRco+XeCijLZpRpV2R7hlGXhj07lN/LBiwItusdZwDRyYR7WTEoUukLsdaKWfI 9VZIAoAEVLjDx5QvuTUe188FAYMJCb5C7hrebKrH/EWICkmwtVBbmScXC0Gv9cm/ZjO9 VREg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687075671; x=1689667671; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=83Nn/kApjqMqR5Y+eBpYu2YO03PvXgyqsQgNeKs9ERs=; b=e5G7Z3RGmHV8eb7Devvgrzbu+ojpDEO1DaHMzmLiT2BL5LHiYVWPDeWYyCi/bVGIdY YlknqmGgLi9o2ZkLeZU6XrSLUyGawlzGBph1L69cxEL/yynwDeR1CLa/QynPHGWXsRVj yDSMxZ5gbbfG3juButAsKLM0imUAYB7MIDSqL8DBnyyTGRK2z9Izc+YDMGBAgZyHQFhb xpGpEv0vZ/uWrBwmsaDhJva+hjwtYyy9rg2HK7tSEyLHospvkXSDnpx2SujPY1cwiEEq 5FQgd8ut1rZ7qBGXJKBjeAS9o2K28HDtLMQNFMcPDrYxto7Gs3dC6f7HMPnBTVpU7LPT t4Zw== X-Gm-Message-State: AC+VfDwAXxS8sLAt/zedHBSG7ATVrLnhVU53N4O4whLIs4ni74iJhX+f E0Z7c1lFhQ9emd8LR2gJdVwn5Q== X-Google-Smtp-Source: ACHHUZ75qpVXAxr5KwOMXF12+H05NwigsHfr8/BY8mshNmgxXsOq3XP/2PF1B3jSenJ7CMeKukh3nQ== X-Received: by 2002:a17:907:702:b0:982:be38:a5df with SMTP id xb2-20020a170907070200b00982be38a5dfmr5961054ejb.63.1687075671039; Sun, 18 Jun 2023 01:07:51 -0700 (PDT) Received: from [192.168.1.20] ([178.197.219.26]) by smtp.gmail.com with ESMTPSA id e27-20020a170906249b00b0098654d3c270sm2815779ejb.52.2023.06.18.01.07.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 18 Jun 2023 01:07:50 -0700 (PDT) Message-ID: Date: Sun, 18 Jun 2023 10:07:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent Content-Language: en-US To: Douglas Anderson , andersson@kernel.org Cc: amit.pundir@linaro.org, Will Deacon , sumit.semwal@linaro.org, linux-arm-msm@vger.kernel.org, konrad.dybcio@somainline.org, linux-arm-kernel@lists.infradead.org, Stephan Gerhold , Manivannan Sadhasivam , Nikita Travkin , Stephen Boyd , Sibi Sankar , Andy Gross , Conor Dooley , Das Srinagesh , Konrad Dybcio , Krzysztof Kozlowski , Rob Herring , Robert Marko , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20230616081440.v2.1.Ie79b5f0ed45739695c9970df121e11d724909157@changeid> From: Krzysztof Kozlowski In-Reply-To: <20230616081440.v2.1.Ie79b5f0ed45739695c9970df121e11d724909157@changeid> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 16/06/2023 17:14, Douglas Anderson wrote: > Trogdor devices use firmware backed by TF-A instead of Qualcomm's > normal TZ. On TF-A we end up mapping memory as cacheable. Specifically, > you can see in Trogdor's TF-A code [1] in qti_sip_mem_assign() that we > call qti_mmap_add_dynamic_region() with MT_RO_DATA. This translates > down to MT_MEMORY instead of MT_NON_CACHEABLE or MT_DEVICE. > > Let's allow devices like trogdor to be described properly by allowing > "dma-coherent" in the SCM node. > > Signed-off-by: Douglas Anderson