From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Courtier-Dutton Subject: Re: [PATCH] Add I/O hypercalls for i386 paravirt Date: Wed, 22 Aug 2007 23:29:14 +0100 Message-ID: <46CCB8BA.6060007@superbug.demon.co.uk> References: <46CBC842.4070100@vmware.com> <46CCB088.8070606@goop.org> <46CCB56F.8090308@superbug.co.uk> <20070822222036.GD3672@sequoia.sous-sol.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20070822222036.GD3672@sequoia.sous-sol.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Chris Wright Cc: Andrew Morton , Linux Kernel Mailing List , Virtualization Mailing List List-Id: virtualization@lists.linuxfoundation.org Chris Wright wrote: > * James Courtier-Dutton (James@superbug.co.uk) wrote: >> If one could directly expose a device to the guest, this feature could >> be extremely useful for me. >> Is it possible? How would it manage to handle the DMA bus mastering? > > Yes it's possible (Xen supports pci pass through). Without an IOMMU > (like Intel VT-d or AMD IOMMU) it's not DMA safe. > > thanks, > -chris Ok, so I need to get a new CPU like the Intel Core Duo that has VT features? I have an old Pentium 4 at the moment, without any VT features. Kind Regards James