From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH] VMX: Corrections to XSA-60 fix Date: Thu, 7 Nov 2013 11:40:07 +0000 Message-ID: <527B7C17.2080004@citrix.com> References: <1383821818-21323-1-git-send-email-andrew.cooper3@citrix.com> <527B830402000078001008ED@nat28.tlf.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1VeNx2-0004is-Pa for xen-devel@lists.xenproject.org; Thu, 07 Nov 2013 11:40:41 +0000 In-Reply-To: <527B830402000078001008ED@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: Liu Jinsong , Jun Nakajima Cc: xen-devel , Keir Fraser , Jan Beulich , Tim Deegan List-Id: xen-devel@lists.xenproject.org On 07/11/13 11:09, Jan Beulich wrote: >>>> On 07.11.13 at 11:56, Andrew Cooper wrote: >> This patch is somewhat RFC, partly because I have only compile-tested it, and >> because of a few further questions. >> >> 1) Are there any other places other than unmap_domain_page() we might want to >> put hooks? Any well behaved access should use {map,unmap}_domain_page() as >> far as I am aware. > Any writes done through map_domain_page_global() mappings. > >> 2) What is expected to happen with Qemu mappings from dom0? As far as I am >> aware, they can't retoactivly have their pagetable caching type changed. > Right, so the flag should also get set when completing ioreq-s. > > Jan > And further questions. * Can Intel confirm which platforms are incapable of using VT-d snooping? * Can Intel confirm which platforms are missing vmx_pat? It would be nice to have an idea of which systems are going to have implicitly changed behaviour andor a performance cliff as a result of these changes. ~Andrew