From mboxrd@z Thu Jan 1 00:00:00 1970 From: Muli Ben-Yehuda Subject: Re: IOMMU in guest OS Date: Wed, 29 Sep 2010 06:31:06 +0200 Message-ID: <20100929043106.GB2828@il.ibm.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org To: Thawan Kooburat Return-path: Received: from mtagate7.de.ibm.com ([195.212.17.167]:60280 "EHLO mtagate7.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750903Ab0I2EdU (ORCPT ); Wed, 29 Sep 2010 00:33:20 -0400 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate7.de.ibm.com (8.13.1/8.13.1) with ESMTP id o8T4XJFG008116 for ; Wed, 29 Sep 2010 04:33:19 GMT Received: from d12av02.megacenter.de.ibm.com (d12av02.megacenter.de.ibm.com [9.149.165.228]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o8T4XIUm3956950 for ; Wed, 29 Sep 2010 06:33:19 +0200 Received: from d12av02.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av02.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id o8T4XI7i019209 for ; Wed, 29 Sep 2010 06:33:18 +0200 Content-Disposition: inline In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On Tue, Sep 28, 2010 at 08:56:57PM -0500, Thawan Kooburat wrote: > Can someone tell my if my understanding is correct or > not. Currently, KVM only use IOMMU to allow PCI/PCI Express device > to be assigned as a PCI device inside guest OS. So right now guest > OS does not see IOMMU as a device, but this may change when IOMMU > emulation (I saw some patches on the list) is merged into > development branch. Correct. Cheers, Muli