From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1VnQzx-0000pM-IY for mharc-grub-devel@gnu.org; Mon, 02 Dec 2013 05:45:05 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37208) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VnQzo-0000n6-8U for grub-devel@gnu.org; Mon, 02 Dec 2013 05:45:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VnQzg-00040D-Js for grub-devel@gnu.org; Mon, 02 Dec 2013 05:44:56 -0500 Received: from toccata.ens-lyon.org ([140.77.166.68]:35985) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VnQzg-0003zR-DT for grub-devel@gnu.org; Mon, 02 Dec 2013 05:44:48 -0500 Received: from localhost (localhost [127.0.0.1]) by toccata.ens-lyon.org (Postfix) with ESMTP id 85D7F84081; Mon, 2 Dec 2013 11:44:36 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at toccata.ens-lyon.org Received: from toccata.ens-lyon.org ([127.0.0.1]) by localhost (toccata.ens-lyon.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JEkQ5koeTOXB; Mon, 2 Dec 2013 11:44:36 +0100 (CET) Received: from type.ipv6 (youpi.vpn.fdn.fr [80.67.179.7]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by toccata.ens-lyon.org (Postfix) with ESMTPSA id 48EB58407B; Mon, 2 Dec 2013 11:44:36 +0100 (CET) Received: from samy by type.ipv6 with local (Exim 4.80) (envelope-from ) id 1VnQsw-0001nT-QJ; Mon, 02 Dec 2013 11:37:50 +0100 Date: Mon, 2 Dec 2013 11:37:50 +0100 From: Samuel Thibault To: Ian Campbell Subject: Re: [Xen-devel] pvgrub2 is merged Message-ID: <20131202103750.GC5756@type.mobile.lan> Mail-Followup-To: Samuel Thibault , Ian Campbell , Andrey Borzenkov , grub-devel@gnu.org, "xen-devel@lists.xen.org" References: <527EA084.6000706@gmail.com> <20131129132422.GC16321@riva.ucam.org> <20131129214427.02439ae0@opensuse.site> <1385977687.7108.11.camel@kazak.uk.xensource.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <1385977687.7108.11.camel@kazak.uk.xensource.com> User-Agent: Mutt/1.5.21+34 (58baf7c9f32f) (2010-12-30) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] X-Received-From: 140.77.166.68 Cc: Andrey Borzenkov , grub-devel@gnu.org, "xen-devel@lists.xen.org" X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: The development of GNU GRUB List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Dec 2013 10:45:03 -0000 Ian Campbell, le Mon 02 Dec 2013 09:48:07 +0000, a =E9crit : > On Fri, 2013-11-29 at 21:44 +0400, Andrey Borzenkov wrote: > > I guess this question is better asked on xen-devel. Assuming we have = 64 > > bit dom0 and try to boot 32 bit domU. Is it possible to start with > > loading 64 bit grub that loads 32 bit kernel and jumps to it? If yes > > (and in other direction too) situation becomes relatively simple. >=20 > AIUI it is not in general possible for a 32-bit PV guest to convert > itself to 64-bit or vice versa, Indeed. At the time of PV-grub1, we discussed about making it possible, but that'd be quite complex and bug-prone, so we preferred not to implement it. Samuel