Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753336AbdIFAvr (ORCPT ); Tue, 5 Sep 2017 20:51:47 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:5973 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752459AbdIFAvn (ORCPT ); Tue, 5 Sep 2017 20:51:43 -0400 Subject: Re: [RFC PATCH 4/6] iommu/arm-smmu-v3: Add SVM support for platform devices To: Jean-Philippe Brucker , Yisheng Xie References: <1504167642-14922-1-git-send-email-xieyisheng1@huawei.com> <1504167642-14922-5-git-send-email-xieyisheng1@huawei.com> <039adc54-00f5-bf4e-e509-ffdc67baa15e@arm.com> CC: , , , , , , , , , , , , , , , , , , , From: Bob Liu Message-ID: <3f4e17fa-dcd0-5692-099a-73105e0e0095@huawei.com> Date: Wed, 6 Sep 2017 08:51:05 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <039adc54-00f5-bf4e-e509-ffdc67baa15e@arm.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.142.83.150] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090206.59AF4689.00D7,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 24a9ec2911777dee5e4fad9c696703e0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1117 Lines: 32 On 2017/9/5 20:53, Jean-Philippe Brucker wrote: > On 31/08/17 09:20, Yisheng Xie wrote: >> From: Jean-Philippe Brucker >> >> Platform device can realise SVM function by using the stall mode. That >> is to say, when device access a memory via iova which is not populated, >> it will stalled and when SMMU try to translate this iova, it also will >> stall and meanwhile send an event to CPU via MSI. >> >> After SMMU driver handle the event and populated the iova, it will send >> a RESUME command to SMMU to exit the stall mode, therefore the platform >> device can contiue access the memory. >> >> Signed-off-by: Jean-Philippe Brucker > > No. Please don't forge a signed-off-by under a commit message you wrote, Really sorry for that. We sent out the wrong version, I should take more careful review. Regards, Liubo > it's rude. I didn't sign it, didn't consider it fit for mainline or even > as an RFC, and wanted to have another read before sending. My mistake, > I'll think twice before sharing prototypes in the future. > > Thanks, > Jean >