From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Liu Subject: Re: [PATCH] libxl: disallow PCI device assignment for HVM guest when PoD is enabled Date: Fri, 10 Jan 2014 11:46:43 +0000 Message-ID: <20140110114643.GF29180@zion.uk.xensource.com> References: <1389353262-27668-1-git-send-email-wei.liu2@citrix.com> <52CFEA170200007800112465@nat28.tlf.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1W1aY3-0003TN-I9 for xen-devel@lists.xenproject.org; Fri, 10 Jan 2014 11:46:47 +0000 Content-Disposition: inline In-Reply-To: <52CFEA170200007800112465@nat28.tlf.novell.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: Jan Beulich Cc: Wei Liu , Ian Campbell , Ian Jackson , Suravee Suthikulpanit , xen-devel , Xiantao Zhang List-Id: xen-devel@lists.xenproject.org On Fri, Jan 10, 2014 at 11:39:51AM +0000, Jan Beulich wrote: > >>> On 10.01.14 at 12:27, Wei Liu wrote: > > + /* We cannot have PoD and PCI device assignment at the same time > > + * for HVM guest. It was reported that VT-d engine cannot > > There's still a "VT-d" left in here... > I mentioned AMD as well. Was trying to clarify things a bit more... Wei. > Jan > > > + * work with PoD enabled because it needs to populated entire page > > + * table for guest. Also a quick grep through AMD IOMMU related > > + * code suggests it has not coped with PoD as well. Just to stay > > + * on the safe side, we disable PCI device assignment with PoD all > > + * together, regardless of the underlying IOMMU in use. > > + */ > >