From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wright Subject: Re: Is PCI pass-through possible with host+kvm on latest linux but guest on an older linux? Date: Wed, 23 Feb 2011 10:30:20 -0800 Message-ID: <20110223183020.GA9869@sequoia.sous-sol.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "kvm@vger.kernel.org" To: "Chigurupati, Chaks" Return-path: Received: from sous-sol.org ([216.99.217.87]:33731 "EHLO sequoia.sous-sol.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752198Ab1BWSaY (ORCPT ); Wed, 23 Feb 2011 13:30:24 -0500 Content-Disposition: inline In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: * Chigurupati, Chaks (chaks@wichorus.com) wrote: > If my hardware is VT-d capable and the host is latest linux+kvm with all > the needed VT-d support but the guest is an older linux (say 2.6.27), will > I be able to use PCI pass-through to hot-plug a PCI device from one guest > to another guest? Any comments/thoughts are appreciated. The basic requirement in the guest to do what you describe is that it has hotplug capability and has the driver for the device you want to assign to it. All the rest of the requirements are on the host sw and hw (linux+kvm capable of device assignment, which latest should be, and hw VT-d or AMD IOMMU). thanks, -chris