From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758255Ab1I3KzI (ORCPT ); Fri, 30 Sep 2011 06:55:08 -0400 Received: from out3.smtp.messagingengine.com ([66.111.4.27]:57044 "EHLO out3.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755484Ab1I3KzG (ORCPT ); Fri, 30 Sep 2011 06:55:06 -0400 X-Sasl-enc: bRSxY58OqZ/tfQgJpu0Jbp5uOu/B1OLAt9FQfvdhUKrE 1317380104 Message-ID: <4E85A03A.4030200@ladisch.de> Date: Fri, 30 Sep 2011 12:55:54 +0200 From: Clemens Ladisch User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: dmarkh@cfl.rr.com CC: markh@compro.net, "linux-pci@vger.kernel.org" , Linux-kernel Subject: Re: Problem with AMD chipsets. Was "Re: problems doing direct dma from a pci device to pci-e device" References: <4E84CA01.2060907@compro.net> <4E84D55A.5050406@compro.net> <4E858200.8070302@ladisch.de> <4E859529.2020504@cfl.rr.com> In-Reply-To: <4E859529.2020504@cfl.rr.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Mark Hounschell wrote: > I wonder what they expect you to get out of "P2P traffic _could_ be only > memory writes" Does that mean it _can_ be configured as "P2P traffic is > enabled for only writes"? In any case I can do neither reads or writes. AFAICT you won't be able to do P2P reads in any case. > As for the MISC bits described in the BDG, it appears that by default all > the P2PDIS bits will be set to 0. Are there tools that would enable me to > look at these bits and even change them if they are set. setpci Regards, Clemens