From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: VT-d support for device assignment Date: Fri, 22 Aug 2008 21:12:32 +0300 Message-ID: <48AF0190.3010103@qumranet.com> References: <1219389054-15332-1-git-send-email-amit.shah@qumranet.com> <20080822160854.GF6885@il.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Byron Stanoszek , Amit Shah , kvm@vger.kernel.org To: Muli Ben-Yehuda Return-path: Received: from il.qumranet.com ([212.179.150.194]:47129 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754749AbYHVSMf (ORCPT ); Fri, 22 Aug 2008 14:12:35 -0400 In-Reply-To: <20080822160854.GF6885@il.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: Muli Ben-Yehuda wrote: > With PCI passthrough It is possible in theory to log mmio's and pio's > executed by the guest, as well as interrupts delivered to the guest, > although it will have a performance impact. It is not possible to log > DMAs in a simple manner, but you could hook up a PCI analyzer to get > the missing bits. > Well, with a pci analyzer you can log anything going in and out of the device; you don't need a virtual machine monitor. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.