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=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 8CE8AC64E7C for ; Wed, 2 Dec 2020 13:58:14 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 19203208FE for ; Wed, 2 Dec 2020 13:58:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 19203208FE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.42753.76930 (Exim 4.92) (envelope-from ) id 1kkSdn-0006oC-S2; Wed, 02 Dec 2020 13:57:55 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 42753.76930; Wed, 02 Dec 2020 13:57:55 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kkSdn-0006o5-P8; Wed, 02 Dec 2020 13:57:55 +0000 Received: by outflank-mailman (input) for mailman id 42753; Wed, 02 Dec 2020 13:57:54 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kkSdm-0006o0-Bh for xen-devel@lists.xenproject.org; Wed, 02 Dec 2020 13:57:54 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kkSdl-0002Dg-2d; Wed, 02 Dec 2020 13:57:53 +0000 Received: from [54.239.6.185] (helo=a483e7b01a66.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1kkSdk-0008MR-Qq; Wed, 02 Dec 2020 13:57:52 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:Cc:To:Subject; bh=91dOSfOWzqw82XPyEpn2waOosAi1g4ire86s59vJbzE=; b=iTGm2lOGrwcJA0B1xt23KGsLdE +Zv8WJmiOP3qEpiFoE5cAPC/xcsEoU8n998b9MMcedZ407D7CQVPGZKOmFcGj3+w5bffFKcGa84c2 ET8PcFNJn8TwdHKFQlllLMSlQvePMmYm/fVsROScGW2o6Gbl88ZmuWVK9UZtxR6OEN9s=; Subject: Re: [PATCH v2 5/8] xen/arm: Remove support for PCI ATS on SMMUv3 To: Rahul Singh , xen-devel@lists.xenproject.org Cc: bertrand.marquis@arm.com, Stefano Stabellini , Volodymyr Babchuk References: <78079d1d6e9d2e7e87125da131e9bdb5809b838a.1606406359.git.rahul.singh@arm.com> From: Julien Grall Message-ID: <0c831595-0ee6-2cd1-cc20-18329cae6b7b@xen.org> Date: Wed, 2 Dec 2020 13:57:51 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <78079d1d6e9d2e7e87125da131e9bdb5809b838a.1606406359.git.rahul.singh@arm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Hi Rahul, On 26/11/2020 17:02, Rahul Singh wrote: > PCI ATS functionality is not implemented and tested on ARM. I agree that short term, this is not going to be implemented. However, I do expect this feature to be used medium term (mostly likely before the driver is out of tech preview). So I think it would be best to keep the code around. Cheers, -- Julien Grall