Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757560Ab0G2Np0 (ORCPT ); Thu, 29 Jul 2010 09:45:26 -0400 Received: from terminus.zytor.com ([198.137.202.10]:34836 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754113Ab0G2NpZ (ORCPT ); Thu, 29 Jul 2010 09:45:25 -0400 Message-ID: <4C5185D0.9060507@zytor.com> Date: Thu, 29 Jul 2010 06:44:48 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.7) Gecko/20100720 Fedora/3.1.1-1.fc13 Thunderbird/3.1.1 MIME-Version: 1.0 To: FUJITA Tomonori CC: konrad.wilk@oracle.com, jeremy@goop.org, Ian.Campbell@citrix.com, albert_herranz@yahoo.es, x86@kernel.org, jbarnes@virtuousgeek.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, tglx@linutronix.de Subject: Re: [PATCH 9/9] x86: Detect whether we should use Xen SWIOTLB. References: <20100728095157I.fujita.tomonori@lab.ntt.co.jp> <20100728223816.GB32739@phenom.dumpdata.com> <4C50B4C2.2070807@zytor.com> <20100729161653G.fujita.tomonori@lab.ntt.co.jp> In-Reply-To: <20100729161653G.fujita.tomonori@lab.ntt.co.jp> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 612 Lines: 18 On 07/29/2010 12:17 AM, FUJITA Tomonori wrote: > btw, (c) is not the fallback case (i.e. if we can't find hardware > IOMMU, we enable swiotlb). We use both hardware IOMMU and swiotlb on > some systems. Right, which is why it can't be folded into (b). -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/