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 9A163C4361B for ; Fri, 11 Dec 2020 15:00:52 +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 2C7A0206F8 for ; Fri, 11 Dec 2020 15:00:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C7A0206F8 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.50663.89397 (Exim 4.92) (envelope-from ) id 1knjQN-0000cE-5a; Fri, 11 Dec 2020 14:29:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 50663.89397; Fri, 11 Dec 2020 14:29:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1knjQN-0000c7-2M; Fri, 11 Dec 2020 14:29:35 +0000 Received: by outflank-mailman (input) for mailman id 50663; Fri, 11 Dec 2020 14:29:33 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1knjQL-0000bz-Na for xen-devel@lists.xenproject.org; Fri, 11 Dec 2020 14:29:33 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1knjQH-0007YB-VR; Fri, 11 Dec 2020 14:29:29 +0000 Received: from [54.239.6.187] (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 1knjQH-0006jH-Nv; Fri, 11 Dec 2020 14:29:29 +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=QAvuEyVoXxjXe/JQfwr5Wkh2jPuI7x0e83APCvioKjY=; b=CnplNqXsDHJwa2Dh5oeDrTlf3J Wee/RRdilYzOSJd9RXDtXPw2Gu+a6zqhUvWmIrav8/E64/eKjdHOJ+Ba2ENrf6JaZm4uhXN0egqpq 59zmG4T2h2KI67Pp68BwIuWRta2Pp4S7Q7AXmqWtld/iODgw1Mh8CCu6mQPzI9/JBvPY=; Subject: Re: [PATCH v3 0/8] xen/arm: Add support for SMMUv3 driver To: Rahul Singh , xen-devel@lists.xenproject.org Cc: bertrand.marquis@arm.com, Stefano Stabellini , Volodymyr Babchuk , Andrew Cooper , George Dunlap , Ian Jackson , Jan Beulich , Wei Liu , Paul Durrant References: From: Julien Grall Message-ID: Date: Fri, 11 Dec 2020 14:29:27 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Hi Rahul, On 10/12/2020 16:56, Rahul Singh wrote: > This patch series is v3 of the work to add support for the SMMUv3 driver. > > Approach taken is to first merge the Linux copy of the SMMUv3 driver > (tag v5.8.18) and then modify the driver to build on XEN. > > MSI and PCI ATS functionality are not supported. Code is not tested and > compiled. Code is guarded by the flag CONFIG_PCI_ATS and CONFIG_MSI to compile > the driver. > > Code specific to Linux is removed from the driver to avoid dead code. > > Driver is currently supported as tech preview. > > Following functionality should be supported before driver is out for tech > preview > 1. Investigate the timing analysis of using spin lock in place of mutex when > attaching a device to SMMU. > 2. Merged the latest Linux SMMUv3 driver code once atomic operation is > available in XEN. > 3. PCI ATS and MSI interrupts should be supported. > 4. Investigate side-effect of using tasklet in place of threaded IRQ and fix > if any. In your last e-mail, you wrote that you would investigate and then come back to use. It wasn't clear that this meant you will not deal with it in this series. > 5. fallthorugh keyword should be supported. This one should really be done now... It is not a complicated one... > 6. Implement the ffsll function in bitops.h file. ... same here. Cheers, -- Julien Grall