From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ross Lagerwall Subject: Re: [PATCH] libxl: Don't insert PCI device into xenstore for HVM guests Date: Fri, 29 May 2015 10:43:08 +0100 Message-ID: <556834AC.5020605@citrix.com> References: <1432886385-20313-1-git-send-email-ross.lagerwall@citrix.com> <20150529094146.GT30474@zion.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20150529094146.GT30474@zion.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Wei Liu , Konrad Rzeszutek Wilk Cc: Stefano Stabellini , Ian Jackson , Ian Campbell , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On 05/29/2015 10:41 AM, Wei Liu wrote: > On Fri, May 29, 2015 at 08:59:45AM +0100, Ross Lagerwall wrote: >> When doing passthrough of a PCI device for an HVM guest, don't insert >> the device into xenstore, otherwise pciback attempts to use it which >> conflicts with QEMU. >> >> This manifests itself such that the first time a device is passed to a >> domain, it succeeds. Subsequent attempts fail unless the device is >> unbound from pciback or the machine rebooted. >> > > The commit message looks sensible to me. However this might break > qemu-trad PCI passthrough if I'm not mistaken. What QEMU version are you > using? Upstream or trad? Have you tested both of them? > qemu-trad. I haven't tested with qemu-upstream. -- Ross Lagerwall