Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2998831AbdDZKzE (ORCPT ); Wed, 26 Apr 2017 06:55:04 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:5801 "EHLO dggrg01-dlp.huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2998694AbdDZKyz (ORCPT ); Wed, 26 Apr 2017 06:54:55 -0400 Subject: Re: [PATCH v4 00/21] PCI: fix config space memory mappings To: Jon Masters , Lorenzo Pieralisi , References: <20170419164913.19674-1-lorenzo.pieralisi@arm.com> <2e24e205-d761-9172-9463-4a53e1a0de4d@jonmasters.org> CC: , , Pratyush Anand , Arnd Bergmann , Jonathan Corbet , Will Deacon , "Jingoo Han" , Bjorn Helgaas , Mingkai Hu , Tanmay Inamdar , "Murali Karicheri" , Russell King , "Bharat Kumar Gogada" , Ray Jui , Wenrui Li , Shawn Lin , Minghuan Lian , Catalin Marinas , Jon Mason , "Gabriele Paoloni" , Thomas Petazzoni , Joao Pinto , Thierry Reding , "Luis R . Rodriguez" , Michal Simek , "Stanimir Varbanov" , Zhou Wang , "Roy Zang" , Benjamin Herrenschmidt , John Garry , Linuxarm From: Dongdong Liu Message-ID: <361fde15-5ba3-d33b-f946-003e89ba071f@huawei.com> Date: Wed, 26 Apr 2017 18:53:30 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <2e24e205-d761-9172-9463-4a53e1a0de4d@jonmasters.org> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-Originating-IP: [10.63.141.93] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020203.59007C3F.020D,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: 38af2593eedde78f25bc8bb92f4538fe Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 964 Lines: 26 Tested-by: Dongdong Liu I tested the patchset on HiSilicon ARM64 D05 board.It works ok with 82599 netcard. Thanks, Dongdong 在 2017/4/25 14:40, Jon Masters 写道: > On 04/19/2017 12:48 PM, Lorenzo Pieralisi wrote: > >> On some platforms (ie ARM/ARM64) ioremap fails to comply with the PCI >> configuration non-posted write transactions requirement, because it >> provides a memory mapping that issues "bufferable" or, in PCI terms >> "posted" write transactions. Likewise, the current pci_remap_iospace() >> implementation maps the physical address range that the PCI translates >> to I/O space cycles to virtual address space through pgprot_device() >> attributes that on eg ARM64 provides a memory mapping issuing >> posted writes transactions, which is not PCI specifications compliant. > > Side note that I've pinged all of the ARM server vendors and asked them > to verify this patch series on their platforms. > > Jon. > > . >