From owner-svn-src-projects@FreeBSD.ORG Mon Nov 21 05:41:03 2011 Return-Path: Delivered-To: svn-src-projects@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CF99D106566B; Mon, 21 Nov 2011 05:41:03 +0000 (UTC) (envelope-from nwhitehorn@freebsd.org) Received: from agogare.doit.wisc.edu (agogare.doit.wisc.edu [144.92.197.211]) by mx1.freebsd.org (Postfix) with ESMTP id A088B8FC0A; Mon, 21 Nov 2011 05:41:03 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII; format=flowed Received: from avs-daemon.smtpauth2.wiscmail.wisc.edu by smtpauth2.wiscmail.wisc.edu (Sun Java(tm) System Messaging Server 7u2-7.05 32bit (built Jul 30 2009)) id <0LUZ00400UCE0T00@smtpauth2.wiscmail.wisc.edu>; Sun, 20 Nov 2011 22:41:02 -0600 (CST) Received: from comporellon.tachypleus.net ([unknown] [76.210.72.96]) by smtpauth2.wiscmail.wisc.edu (Sun Java(tm) System Messaging Server 7u2-7.05 32bit (built Jul 30 2009)) with ESMTPSA id <0LUZ00CV1UCCGT20@smtpauth2.wiscmail.wisc.edu>; Sun, 20 Nov 2011 22:41:01 -0600 (CST) Date: Sun, 20 Nov 2011 22:41:00 -0600 From: Nathan Whitehorn In-reply-to: <4EC98E99.9000601@freebsd.org> To: Peter Grehan Message-id: <4EC9D65C.6050106@freebsd.org> X-Spam-Report: AuthenticatedSender=yes, SenderIP=76.210.72.96 X-Spam-PmxInfo: Server=avs-13, Version=5.6.1.2065439, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2011.11.21.43315, SenderIP=76.210.72.96 References: <201111202147.pAKLlR0i010700@svn.freebsd.org> <4EC98E99.9000601@freebsd.org> User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:8.0) Gecko/20111113 Thunderbird/8.0 Cc: svn-src-projects@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r227772 - in projects/pseries: amd64/amd64 amd64/conf amd64/ia32 amd64/include amd64/linux32 arm/arm arm/at91 arm/conf arm/econa arm/include arm/mv arm/sa11x0 arm/xscale/i80321 arm/xsca... X-BeenThere: svn-src-projects@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the src " projects" tree" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 21 Nov 2011 05:41:03 -0000 On 11/20/11 17:34, Peter Grehan wrote: > Hi Nathan, > >> IFC @ r227771. Of particular interest here are virtio drivers, which >> should be useful for the QEMU pSeries emulation. > > One thing to look out for is that the virtio spec has PCI register > access in host-order, so you may need to switch in big-endian bus ops. > > later, > > Peter. Is it worth making some generic way to avoid regular bus accessors? It also needs to avoid regular bus dma calls, since the spec indicates finger-of-God accesses that bypass any emulated IOMMU that busdma would ordinarily try to use. -Nathan