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 856C3C433EF for ; Tue, 31 May 2022 17:09:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346309AbiEaRJ0 (ORCPT ); Tue, 31 May 2022 13:09:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236090AbiEaRJY (ORCPT ); Tue, 31 May 2022 13:09:24 -0400 Received: from mail-lf1-x130.google.com (mail-lf1-x130.google.com [IPv6:2a00:1450:4864:20::130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8465A6B036; Tue, 31 May 2022 10:09:23 -0700 (PDT) Received: by mail-lf1-x130.google.com with SMTP id s6so6526300lfo.13; Tue, 31 May 2022 10:09:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=oXC+omMyhQE+yQOLbS6KJe5K78bZY03LjtAozxlOWS4=; b=TAyjZkyHiTXmbmHCSrE2qWJwfpy2mK18RqayHB9KPwF3D5Pg+bZ6eGYNeN34jbspjz XKAIAKaqLBFgTkjxxqEqqjzKoQ4toUSB64OhXxsfMMRXeKBxTuUTXvyIQGUiGfioo7kC oMkYvmT4C0UXva0czCxfN3JpmbeZVhWBsYi1qGOpj0WhxatmjVmbr0Qp0zNQmGicVbqD XOkcjG3W1KKt5f0akOma0UDAHja0EIq/KJOrVyQ2kluOg8ugvRzH57Wsp2EqTBQKNt5m 4tqMtwtv+jysyfjiBaAa2EYLry0bXPvGexMdU0w2FewQWJm/hZYWq2QWm7FRLYNLGMi4 npkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=oXC+omMyhQE+yQOLbS6KJe5K78bZY03LjtAozxlOWS4=; b=PtSFlzs/ZV6s2lB045ns/cNkFL0Qj4KFrIkWpZ2KrlQ1dUN8S1QVOuAgxnVDi9Zug5 5anLRvBfgYNGvoTJIrai+cQwo4f2kvmyWJuYE/Tc2sJo31gLiT6XRWxGqIRxPH2dj8qa PnSDjGI9TTzfaURHJSGaVTQD60QS8wmQ7cy3AfDnfYwxWReFjMWu5xcaTvOn6nE7BLHh Bb3tCw1wZcJcf9R4mAbR+E35OcJC8SoWYFawRxaleI5dsBshNAEdA9xE9PMILQCbUu/k S1mb5hS5FaoQbj44hn6VjvK1U+vIn/VYuWWhMW6MMRX556BbvXc2sh33Bjk66aIVIPZJ 8Kaw== X-Gm-Message-State: AOAM5310fwHwklb2R2goWSWJUEMp1XPsvJ3KDzOqioSbHdTLPJYvhbc4 6whBHQPALodaYmZJQJmPr0O/fZogUOw= X-Google-Smtp-Source: ABdhPJwx9hqwCt9lTBlhLuxF3159ZiuKQMGeaQRRGSerHfQCM1lHwBJOFfe0u0PJDGwPNceRQMYbag== X-Received: by 2002:ac2:4f09:0:b0:478:6c80:64fc with SMTP id k9-20020ac24f09000000b004786c8064fcmr26696653lfr.34.1654016961692; Tue, 31 May 2022 10:09:21 -0700 (PDT) Received: from [192.168.1.7] ([212.22.223.21]) by smtp.gmail.com with ESMTPSA id i6-20020a196d06000000b00477cab33759sm3072432lfc.256.2022.05.31.10.09.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 31 May 2022 10:09:21 -0700 (PDT) Subject: Re: [PATCH V3 5/8] dt-bindings: Add xen,grant-dma IOMMU description for xen-grant DMA ops To: Krzysztof Kozlowski , xen-devel@lists.xenproject.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org Cc: Oleksandr Tyshchenko , Rob Herring , Joerg Roedel , Will Deacon , Krzysztof Kozlowski , Julien Grall , Juergen Gross , Stefano Stabellini , "Michael S. Tsirkin" , Christoph Hellwig , Arnd Bergmann References: <1653944417-17168-1-git-send-email-olekstysh@gmail.com> <1653944417-17168-6-git-send-email-olekstysh@gmail.com> <15eef004-74c7-0eb5-3f87-86e164ef70ff@linaro.org> From: Oleksandr Message-ID: Date: Tue, 31 May 2022 20:09:19 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <15eef004-74c7-0eb5-3f87-86e164ef70ff@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 31.05.22 14:52, Krzysztof Kozlowski wrote: Hello Krzysztof > On 30/05/2022 23:00, Oleksandr Tyshchenko wrote: >> From: Oleksandr Tyshchenko > Thank you for your patch. There is something to discuss/improve. > >> diff --git a/Documentation/devicetree/bindings/iommu/xen,grant-dma.yaml b/Documentation/devicetree/bindings/iommu/xen,grant-dma.yaml >> new file mode 100644 >> index 00000000..ab5765c >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/iommu/xen,grant-dma.yaml >> @@ -0,0 +1,49 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/iommu/xen,grant-dma.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Xen specific IOMMU for virtualized devices (e.g. virtio) >> + >> +maintainers: >> + - Stefano Stabellini >> + >> +description: >> + The reference to Xen specific IOMMU node using "iommus" property indicates >> + that Xen grant mappings need to be enabled for the device, and it specifies >> + the ID of the domain where the corresponding backend resides. >> + The binding is required to restrict memory access using Xen grant mappings. >> + >> +properties: >> + compatible: >> + const: xen,grant-dma >> + >> + '#iommu-cells': >> + const: 1 >> + description: >> + Xen specific IOMMU is multiple-master IOMMU device. >> + The single cell describes the domid (domain ID) of the domain where >> + the backend is running. >> + >> +required: >> + - compatible >> + - "#iommu-cells" >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + xen_iommu { > No underscores in node names, generic node names, so this looks like > "iommu". ok, will change > >> + compatible = "xen,grant-dma"; >> + #iommu-cells = <1>; >> + }; >> + >> + virtio@3000 { >> + compatible = "virtio,mmio"; >> + reg = <0x3000 0x100>; >> + interrupts = <41>; >> + >> + /* The backend is located in Xen domain with ID 1 */ >> + iommus = <&xen_iommu 1>; > There is no need usually to give consumer examples in provider binding. > If there is nothing specific here (looks exactly like every IOMMU > consumer in Linux kernel), drop the consumer. I got it.  There is nothing specific from the device tree's perspective, I was thinking to draw attention to the IOMMU specifier (in our case, the master device's ID == backend's domain ID). But  '#iommu-cells' description above already clarifies that. Will drop. > >> + }; > > Best regards, > Krzysztof -- Regards, Oleksandr Tyshchenko 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id D5E29C433F5 for ; Tue, 31 May 2022 17:09:28 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 8B8DA61293; Tue, 31 May 2022 17:09:28 +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 ZHnY1CDwfnNe; Tue, 31 May 2022 17:09:27 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTPS id 4F46960E29; Tue, 31 May 2022 17:09:27 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 057CAC0039; Tue, 31 May 2022 17:09:27 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 79811C002D for ; Tue, 31 May 2022 17:09:25 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 560DC41834 for ; Tue, 31 May 2022 17:09:25 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp4.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Yh-fNUdYhteW for ; Tue, 31 May 2022 17:09:24 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from mail-lf1-x12a.google.com (mail-lf1-x12a.google.com [IPv6:2a00:1450:4864:20::12a]) by smtp4.osuosl.org (Postfix) with ESMTPS id DA59641830 for ; Tue, 31 May 2022 17:09:23 +0000 (UTC) Received: by mail-lf1-x12a.google.com with SMTP id j10so22407254lfe.12 for ; Tue, 31 May 2022 10:09:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=oXC+omMyhQE+yQOLbS6KJe5K78bZY03LjtAozxlOWS4=; b=TAyjZkyHiTXmbmHCSrE2qWJwfpy2mK18RqayHB9KPwF3D5Pg+bZ6eGYNeN34jbspjz XKAIAKaqLBFgTkjxxqEqqjzKoQ4toUSB64OhXxsfMMRXeKBxTuUTXvyIQGUiGfioo7kC oMkYvmT4C0UXva0czCxfN3JpmbeZVhWBsYi1qGOpj0WhxatmjVmbr0Qp0zNQmGicVbqD XOkcjG3W1KKt5f0akOma0UDAHja0EIq/KJOrVyQ2kluOg8ugvRzH57Wsp2EqTBQKNt5m 4tqMtwtv+jysyfjiBaAa2EYLry0bXPvGexMdU0w2FewQWJm/hZYWq2QWm7FRLYNLGMi4 npkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=oXC+omMyhQE+yQOLbS6KJe5K78bZY03LjtAozxlOWS4=; b=0eiJv5AADWIW729nIQDh++/KdORD45DdDbblrNsxA68tuUjYhYWT7dkYgua1NRjn1f WY5p5RqzyYqpPm4PcdX4x3j9l3luURuLZKJyAOgI8K4pqZPnx1FSFqcwLfoxFoSrgrgi qoMhVNcEt1VCG68rUtwOuGjkByQUJ/SAwFX5XLCuQWeHrX5JJCsLuCrqODpYn6wExcS9 pyo4xv0TwJdY+ptmT8DZwEkvjH+7L02EmqTCOsP87sty8YwGPofc9opgwCczeiwQmQob ncChJPLGi0RnLQYRDsBbb/NVY3wzohDpAUTdKE56S2HHnBU5W6sgrKNa203IiT5FZCDz zwpQ== X-Gm-Message-State: AOAM531MAyh4IXyE6ayw2sVp0a/zSAO66O1BbTHarfil6Hl+Q8dPdSP3 3ZQHuFlGWeLy1VvYbBpclBU= X-Google-Smtp-Source: ABdhPJwx9hqwCt9lTBlhLuxF3159ZiuKQMGeaQRRGSerHfQCM1lHwBJOFfe0u0PJDGwPNceRQMYbag== X-Received: by 2002:ac2:4f09:0:b0:478:6c80:64fc with SMTP id k9-20020ac24f09000000b004786c8064fcmr26696653lfr.34.1654016961692; Tue, 31 May 2022 10:09:21 -0700 (PDT) Received: from [192.168.1.7] ([212.22.223.21]) by smtp.gmail.com with ESMTPSA id i6-20020a196d06000000b00477cab33759sm3072432lfc.256.2022.05.31.10.09.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 31 May 2022 10:09:21 -0700 (PDT) Subject: Re: [PATCH V3 5/8] dt-bindings: Add xen,grant-dma IOMMU description for xen-grant DMA ops To: Krzysztof Kozlowski , xen-devel@lists.xenproject.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org References: <1653944417-17168-1-git-send-email-olekstysh@gmail.com> <1653944417-17168-6-git-send-email-olekstysh@gmail.com> <15eef004-74c7-0eb5-3f87-86e164ef70ff@linaro.org> From: Oleksandr Message-ID: Date: Tue, 31 May 2022 20:09:19 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <15eef004-74c7-0eb5-3f87-86e164ef70ff@linaro.org> Content-Language: en-US Cc: Juergen Gross , Stefano Stabellini , Julien Grall , Arnd Bergmann , "Michael S. Tsirkin" , Christoph Hellwig , Oleksandr Tyshchenko , Rob Herring , Krzysztof Kozlowski , Will Deacon 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: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Ck9uIDMxLjA1LjIyIDE0OjUyLCBLcnp5c3p0b2YgS296bG93c2tpIHdyb3RlOgoKSGVsbG8gS3J6 eXN6dG9mCgo+IE9uIDMwLzA1LzIwMjIgMjM6MDAsIE9sZWtzYW5kciBUeXNoY2hlbmtvIHdyb3Rl Ogo+PiBGcm9tOiBPbGVrc2FuZHIgVHlzaGNoZW5rbyA8b2xla3NhbmRyX3R5c2hjaGVua29AZXBh bS5jb20+Cj4gVGhhbmsgeW91IGZvciB5b3VyIHBhdGNoLiBUaGVyZSBpcyBzb21ldGhpbmcgdG8g ZGlzY3Vzcy9pbXByb3ZlLgo+Cj4+IGRpZmYgLS1naXQgYS9Eb2N1bWVudGF0aW9uL2RldmljZXRy ZWUvYmluZGluZ3MvaW9tbXUveGVuLGdyYW50LWRtYS55YW1sIGIvRG9jdW1lbnRhdGlvbi9kZXZp Y2V0cmVlL2JpbmRpbmdzL2lvbW11L3hlbixncmFudC1kbWEueWFtbAo+PiBuZXcgZmlsZSBtb2Rl IDEwMDY0NAo+PiBpbmRleCAwMDAwMDAwMC4uYWI1NzY1Ywo+PiAtLS0gL2Rldi9udWxsCj4+ICsr KyBiL0RvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy9pb21tdS94ZW4sZ3JhbnQtZG1h LnlhbWwKPj4gQEAgLTAsMCArMSw0OSBAQAo+PiArIyBTUERYLUxpY2Vuc2UtSWRlbnRpZmllcjog KEdQTC0yLjAtb25seSBvciBCU0QtMi1DbGF1c2UpCj4+ICslWUFNTCAxLjIKPj4gKy0tLQo+PiAr JGlkOiBodHRwOi8vZGV2aWNldHJlZS5vcmcvc2NoZW1hcy9pb21tdS94ZW4sZ3JhbnQtZG1hLnlh bWwjCj4+ICskc2NoZW1hOiBodHRwOi8vZGV2aWNldHJlZS5vcmcvbWV0YS1zY2hlbWFzL2NvcmUu eWFtbCMKPj4gKwo+PiArdGl0bGU6IFhlbiBzcGVjaWZpYyBJT01NVSBmb3IgdmlydHVhbGl6ZWQg ZGV2aWNlcyAoZS5nLiB2aXJ0aW8pCj4+ICsKPj4gK21haW50YWluZXJzOgo+PiArICAtIFN0ZWZh bm8gU3RhYmVsbGluaSA8c3N0YWJlbGxpbmlAa2VybmVsLm9yZz4KPj4gKwo+PiArZGVzY3JpcHRp b246Cj4+ICsgIFRoZSByZWZlcmVuY2UgdG8gWGVuIHNwZWNpZmljIElPTU1VIG5vZGUgdXNpbmcg ImlvbW11cyIgcHJvcGVydHkgaW5kaWNhdGVzCj4+ICsgIHRoYXQgWGVuIGdyYW50IG1hcHBpbmdz IG5lZWQgdG8gYmUgZW5hYmxlZCBmb3IgdGhlIGRldmljZSwgYW5kIGl0IHNwZWNpZmllcwo+PiAr ICB0aGUgSUQgb2YgdGhlIGRvbWFpbiB3aGVyZSB0aGUgY29ycmVzcG9uZGluZyBiYWNrZW5kIHJl c2lkZXMuCj4+ICsgIFRoZSBiaW5kaW5nIGlzIHJlcXVpcmVkIHRvIHJlc3RyaWN0IG1lbW9yeSBh Y2Nlc3MgdXNpbmcgWGVuIGdyYW50IG1hcHBpbmdzLgo+PiArCj4+ICtwcm9wZXJ0aWVzOgo+PiAr ICBjb21wYXRpYmxlOgo+PiArICAgIGNvbnN0OiB4ZW4sZ3JhbnQtZG1hCj4+ICsKPj4gKyAgJyNp b21tdS1jZWxscyc6Cj4+ICsgICAgY29uc3Q6IDEKPj4gKyAgICBkZXNjcmlwdGlvbjoKPj4gKyAg ICAgIFhlbiBzcGVjaWZpYyBJT01NVSBpcyBtdWx0aXBsZS1tYXN0ZXIgSU9NTVUgZGV2aWNlLgo+ PiArICAgICAgVGhlIHNpbmdsZSBjZWxsIGRlc2NyaWJlcyB0aGUgZG9taWQgKGRvbWFpbiBJRCkg b2YgdGhlIGRvbWFpbiB3aGVyZQo+PiArICAgICAgdGhlIGJhY2tlbmQgaXMgcnVubmluZy4KPj4g Kwo+PiArcmVxdWlyZWQ6Cj4+ICsgIC0gY29tcGF0aWJsZQo+PiArICAtICIjaW9tbXUtY2VsbHMi Cj4+ICsKPj4gK2FkZGl0aW9uYWxQcm9wZXJ0aWVzOiBmYWxzZQo+PiArCj4+ICtleGFtcGxlczoK Pj4gKyAgLSB8Cj4+ICsgICAgeGVuX2lvbW11IHsKPiBObyB1bmRlcnNjb3JlcyBpbiBub2RlIG5h bWVzLCBnZW5lcmljIG5vZGUgbmFtZXMsIHNvIHRoaXMgbG9va3MgbGlrZQo+ICJpb21tdSIuCgoK b2ssIHdpbGwgY2hhbmdlCgoKPgo+PiArICAgICAgICBjb21wYXRpYmxlID0gInhlbixncmFudC1k bWEiOwo+PiArICAgICAgICAjaW9tbXUtY2VsbHMgPSA8MT47Cj4+ICsgICAgfTsKPj4gKwo+PiAr ICAgIHZpcnRpb0AzMDAwIHsKPj4gKyAgICAgICAgY29tcGF0aWJsZSA9ICJ2aXJ0aW8sbW1pbyI7 Cj4+ICsgICAgICAgIHJlZyA9IDwweDMwMDAgMHgxMDA+Owo+PiArICAgICAgICBpbnRlcnJ1cHRz ID0gPDQxPjsKPj4gKwo+PiArICAgICAgICAvKiBUaGUgYmFja2VuZCBpcyBsb2NhdGVkIGluIFhl biBkb21haW4gd2l0aCBJRCAxICovCj4+ICsgICAgICAgIGlvbW11cyA9IDwmeGVuX2lvbW11IDE+ Owo+IFRoZXJlIGlzIG5vIG5lZWQgdXN1YWxseSB0byBnaXZlIGNvbnN1bWVyIGV4YW1wbGVzIGlu IHByb3ZpZGVyIGJpbmRpbmcuCj4gSWYgdGhlcmUgaXMgbm90aGluZyBzcGVjaWZpYyBoZXJlIChs b29rcyBleGFjdGx5IGxpa2UgZXZlcnkgSU9NTVUKPiBjb25zdW1lciBpbiBMaW51eCBrZXJuZWwp LCBkcm9wIHRoZSBjb25zdW1lci4KCgpJIGdvdCBpdC7CoCBUaGVyZSBpcyBub3RoaW5nIHNwZWNp ZmljIGZyb20gdGhlIGRldmljZSB0cmVlJ3MgcGVyc3BlY3RpdmUsIApJIHdhcyB0aGlua2luZyB0 byBkcmF3IGF0dGVudGlvbiB0byB0aGUgSU9NTVUgc3BlY2lmaWVyIChpbiBvdXIgY2FzZSwgCnRo ZSBtYXN0ZXIgZGV2aWNlJ3MgSUQgPT0gYmFja2VuZCdzIGRvbWFpbiBJRCkuIEJ1dMKgICcjaW9t bXUtY2VsbHMnIApkZXNjcmlwdGlvbiBhYm92ZSBhbHJlYWR5IGNsYXJpZmllcyB0aGF0LiBXaWxs IGRyb3AuCgoKPgo+PiArICAgIH07Cj4KPiBCZXN0IHJlZ2FyZHMsCj4gS3J6eXN6dG9mCgotLSAK UmVnYXJkcywKCk9sZWtzYW5kciBUeXNoY2hlbmtvCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGlu dXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxt YW4vbGlzdGluZm8vaW9tbXU= 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D5633C433F5 for ; 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Tue, 31 May 2022 10:09:21 -0700 (PDT) Subject: Re: [PATCH V3 5/8] dt-bindings: Add xen,grant-dma IOMMU description for xen-grant DMA ops To: Krzysztof Kozlowski , xen-devel@lists.xenproject.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org Cc: Oleksandr Tyshchenko , Rob Herring , Joerg Roedel , Will Deacon , Krzysztof Kozlowski , Julien Grall , Juergen Gross , Stefano Stabellini , "Michael S. Tsirkin" , Christoph Hellwig , Arnd Bergmann References: <1653944417-17168-1-git-send-email-olekstysh@gmail.com> <1653944417-17168-6-git-send-email-olekstysh@gmail.com> <15eef004-74c7-0eb5-3f87-86e164ef70ff@linaro.org> From: Oleksandr Message-ID: Date: Tue, 31 May 2022 20:09:19 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <15eef004-74c7-0eb5-3f87-86e164ef70ff@linaro.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220531_100925_637289_0798DC29 X-CRM114-Status: GOOD ( 24.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Ck9uIDMxLjA1LjIyIDE0OjUyLCBLcnp5c3p0b2YgS296bG93c2tpIHdyb3RlOgoKSGVsbG8gS3J6 eXN6dG9mCgo+IE9uIDMwLzA1LzIwMjIgMjM6MDAsIE9sZWtzYW5kciBUeXNoY2hlbmtvIHdyb3Rl Ogo+PiBGcm9tOiBPbGVrc2FuZHIgVHlzaGNoZW5rbyA8b2xla3NhbmRyX3R5c2hjaGVua29AZXBh bS5jb20+Cj4gVGhhbmsgeW91IGZvciB5b3VyIHBhdGNoLiBUaGVyZSBpcyBzb21ldGhpbmcgdG8g ZGlzY3Vzcy9pbXByb3ZlLgo+Cj4+IGRpZmYgLS1naXQgYS9Eb2N1bWVudGF0aW9uL2RldmljZXRy ZWUvYmluZGluZ3MvaW9tbXUveGVuLGdyYW50LWRtYS55YW1sIGIvRG9jdW1lbnRhdGlvbi9kZXZp Y2V0cmVlL2JpbmRpbmdzL2lvbW11L3hlbixncmFudC1kbWEueWFtbAo+PiBuZXcgZmlsZSBtb2Rl IDEwMDY0NAo+PiBpbmRleCAwMDAwMDAwMC4uYWI1NzY1Ywo+PiAtLS0gL2Rldi9udWxsCj4+ICsr KyBiL0RvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy9pb21tdS94ZW4sZ3JhbnQtZG1h LnlhbWwKPj4gQEAgLTAsMCArMSw0OSBAQAo+PiArIyBTUERYLUxpY2Vuc2UtSWRlbnRpZmllcjog KEdQTC0yLjAtb25seSBvciBCU0QtMi1DbGF1c2UpCj4+ICslWUFNTCAxLjIKPj4gKy0tLQo+PiAr JGlkOiBodHRwOi8vZGV2aWNldHJlZS5vcmcvc2NoZW1hcy9pb21tdS94ZW4sZ3JhbnQtZG1hLnlh bWwjCj4+ICskc2NoZW1hOiBodHRwOi8vZGV2aWNldHJlZS5vcmcvbWV0YS1zY2hlbWFzL2NvcmUu eWFtbCMKPj4gKwo+PiArdGl0bGU6IFhlbiBzcGVjaWZpYyBJT01NVSBmb3IgdmlydHVhbGl6ZWQg ZGV2aWNlcyAoZS5nLiB2aXJ0aW8pCj4+ICsKPj4gK21haW50YWluZXJzOgo+PiArICAtIFN0ZWZh bm8gU3RhYmVsbGluaSA8c3N0YWJlbGxpbmlAa2VybmVsLm9yZz4KPj4gKwo+PiArZGVzY3JpcHRp b246Cj4+ICsgIFRoZSByZWZlcmVuY2UgdG8gWGVuIHNwZWNpZmljIElPTU1VIG5vZGUgdXNpbmcg ImlvbW11cyIgcHJvcGVydHkgaW5kaWNhdGVzCj4+ICsgIHRoYXQgWGVuIGdyYW50IG1hcHBpbmdz IG5lZWQgdG8gYmUgZW5hYmxlZCBmb3IgdGhlIGRldmljZSwgYW5kIGl0IHNwZWNpZmllcwo+PiAr ICB0aGUgSUQgb2YgdGhlIGRvbWFpbiB3aGVyZSB0aGUgY29ycmVzcG9uZGluZyBiYWNrZW5kIHJl c2lkZXMuCj4+ICsgIFRoZSBiaW5kaW5nIGlzIHJlcXVpcmVkIHRvIHJlc3RyaWN0IG1lbW9yeSBh Y2Nlc3MgdXNpbmcgWGVuIGdyYW50IG1hcHBpbmdzLgo+PiArCj4+ICtwcm9wZXJ0aWVzOgo+PiAr ICBjb21wYXRpYmxlOgo+PiArICAgIGNvbnN0OiB4ZW4sZ3JhbnQtZG1hCj4+ICsKPj4gKyAgJyNp b21tdS1jZWxscyc6Cj4+ICsgICAgY29uc3Q6IDEKPj4gKyAgICBkZXNjcmlwdGlvbjoKPj4gKyAg ICAgIFhlbiBzcGVjaWZpYyBJT01NVSBpcyBtdWx0aXBsZS1tYXN0ZXIgSU9NTVUgZGV2aWNlLgo+ PiArICAgICAgVGhlIHNpbmdsZSBjZWxsIGRlc2NyaWJlcyB0aGUgZG9taWQgKGRvbWFpbiBJRCkg b2YgdGhlIGRvbWFpbiB3aGVyZQo+PiArICAgICAgdGhlIGJhY2tlbmQgaXMgcnVubmluZy4KPj4g Kwo+PiArcmVxdWlyZWQ6Cj4+ICsgIC0gY29tcGF0aWJsZQo+PiArICAtICIjaW9tbXUtY2VsbHMi Cj4+ICsKPj4gK2FkZGl0aW9uYWxQcm9wZXJ0aWVzOiBmYWxzZQo+PiArCj4+ICtleGFtcGxlczoK Pj4gKyAgLSB8Cj4+ICsgICAgeGVuX2lvbW11IHsKPiBObyB1bmRlcnNjb3JlcyBpbiBub2RlIG5h bWVzLCBnZW5lcmljIG5vZGUgbmFtZXMsIHNvIHRoaXMgbG9va3MgbGlrZQo+ICJpb21tdSIuCgoK b2ssIHdpbGwgY2hhbmdlCgoKPgo+PiArICAgICAgICBjb21wYXRpYmxlID0gInhlbixncmFudC1k bWEiOwo+PiArICAgICAgICAjaW9tbXUtY2VsbHMgPSA8MT47Cj4+ICsgICAgfTsKPj4gKwo+PiAr ICAgIHZpcnRpb0AzMDAwIHsKPj4gKyAgICAgICAgY29tcGF0aWJsZSA9ICJ2aXJ0aW8sbW1pbyI7 Cj4+ICsgICAgICAgIHJlZyA9IDwweDMwMDAgMHgxMDA+Owo+PiArICAgICAgICBpbnRlcnJ1cHRz ID0gPDQxPjsKPj4gKwo+PiArICAgICAgICAvKiBUaGUgYmFja2VuZCBpcyBsb2NhdGVkIGluIFhl biBkb21haW4gd2l0aCBJRCAxICovCj4+ICsgICAgICAgIGlvbW11cyA9IDwmeGVuX2lvbW11IDE+ Owo+IFRoZXJlIGlzIG5vIG5lZWQgdXN1YWxseSB0byBnaXZlIGNvbnN1bWVyIGV4YW1wbGVzIGlu IHByb3ZpZGVyIGJpbmRpbmcuCj4gSWYgdGhlcmUgaXMgbm90aGluZyBzcGVjaWZpYyBoZXJlIChs b29rcyBleGFjdGx5IGxpa2UgZXZlcnkgSU9NTVUKPiBjb25zdW1lciBpbiBMaW51eCBrZXJuZWwp LCBkcm9wIHRoZSBjb25zdW1lci4KCgpJIGdvdCBpdC7CoCBUaGVyZSBpcyBub3RoaW5nIHNwZWNp ZmljIGZyb20gdGhlIGRldmljZSB0cmVlJ3MgcGVyc3BlY3RpdmUsIApJIHdhcyB0aGlua2luZyB0 byBkcmF3IGF0dGVudGlvbiB0byB0aGUgSU9NTVUgc3BlY2lmaWVyIChpbiBvdXIgY2FzZSwgCnRo ZSBtYXN0ZXIgZGV2aWNlJ3MgSUQgPT0gYmFja2VuZCdzIGRvbWFpbiBJRCkuIEJ1dMKgICcjaW9t bXUtY2VsbHMnIApkZXNjcmlwdGlvbiBhYm92ZSBhbHJlYWR5IGNsYXJpZmllcyB0aGF0LiBXaWxs IGRyb3AuCgoKPgo+PiArICAgIH07Cj4KPiBCZXN0IHJlZ2FyZHMsCj4gS3J6eXN6dG9mCgotLSAK UmVnYXJkcywKCk9sZWtzYW5kciBUeXNoY2hlbmtvCgoKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGlu dXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQu b3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=