From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH] x86: Convert shadow-paging to Kconfig
Date: Tue, 19 Jan 2016 13:50:28 +0000
Message-ID: <1453211428.29930.44.camel@citrix.com>
References: <1453142404-8819-1-git-send-email-andrew.cooper3@citrix.com>
	<1453196796.6020.217.camel@citrix.com> <569E3C86.20407@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <569E3C86.20407@citrix.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Andrew Cooper <andrew.cooper3@citrix.com>, Xen-devel <xen-devel@lists.xen.org>
Cc: George Dunlap <george.dunlap@eu.citrix.com>, Tim Deegan <tim@xen.org>, Doug Goldstein <cardoe@cardoe.com>, Jan Beulich <JBeulich@suse.com>
List-Id: xen-devel@lists.xenproject.org

On Tue, 2016-01-19 at 13:39 +0000, Andrew Cooper wrote:
> On 19/01/16 09:46, Ian Campbell wrote:
> > On Mon, 2016-01-18 at 18:40 +0000, Andrew Cooper wrote:
> > > Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
> > Does this have any impact on migration of either PV or HVM guests?
> 
> Not in the slightest.
> 
> > What about nested virt?
> 
> Nested virt is completely broken with respect to migration.

Sorry, I meant impact (generally) on nested, not WRT migration. AIUI shadow
is required for either L1 or L2 (not sure which).

> > Are things which are defined in xen/arch/*/Rules.mk in this way
> > overrideable from the old top-level .config or does one need to dive
> > deeper
> > to modify them?
> 
> Absolutely everything anywhere in the build system is/was configurable
> from the top .config

OK, good, so no change here, that's fine then.

> > Lastly, Tim is maintainer of the shadow code and should have been CC-d,
> > also George as maintainer of the mm stuff might have an interest. Both
> > CC-s 
> > added.
> 
> Oops yes, although this is an entirely mechanical alteration to an
> option which already existed.
> 
> ~Andrew