Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753513AbdIFBVP (ORCPT ); Tue, 5 Sep 2017 21:21:15 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:5543 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750880AbdIFBVL (ORCPT ); Tue, 5 Sep 2017 21:21:11 -0400 Subject: Re: [RFC PATCH 4/6] iommu/arm-smmu-v3: Add SVM support for platform devices To: Bob Liu , Jean-Philippe Brucker 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> <3f4e17fa-dcd0-5692-099a-73105e0e0095@huawei.com> CC: , , , , , , , , , , , , , , , , , , , From: Yisheng Xie Message-ID: Date: Wed, 6 Sep 2017 09:20:32 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 MIME-Version: 1.0 In-Reply-To: <3f4e17fa-dcd0-5692-099a-73105e0e0095@huawei.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.29.40] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020205.59AF4D76.0053,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: 49fbd273253cce5d78dd53395dbcdca1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1259 Lines: 42 Hi Jean-Philippe, On 2017/9/6 8:51, Bob Liu wrote: > 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, Sorry about that, it is my mistake. > > 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 >> > > > > > . >