From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753236AbaHTWBH (ORCPT ); Wed, 20 Aug 2014 18:01:07 -0400 Received: from terminus.zytor.com ([198.137.202.10]:54574 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752775AbaHTWBF (ORCPT ); Wed, 20 Aug 2014 18:01:05 -0400 Message-ID: <53F51A80.4060902@zytor.com> Date: Wed, 20 Aug 2014 17:00:32 -0500 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 MIME-Version: 1.0 To: Jan Beulich , gnomes@lxorguk.ukuu.org.uk CC: stefan.bader@canonical.com, toshi.kani@hp.com, x86@kernel.org, ville.syrjala@linux.intel.com, xen-devel@lists.xensource.com, Juergen Gross , linux-kernel@vger.kernel.org Subject: Re: [Xen-devel] [PATCH RFC 0/3] x86: Full support of PAT References: <1408454745-32358-1-git-send-email-jgross@suse.com> <20140820130511.771aeafa@alan.etchedpixels.co.uk> <53F4A0D202000078000BAD84@mail.emea.novell.com> In-Reply-To: <53F4A0D202000078000BAD84@mail.emea.novell.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/20/2014 07:21 AM, Jan Beulich wrote: > > But you're aware that for the last two major releases Xen hasn't been supporting > 32-bit CPUs at all anymore? I.e. why should we limit functionality under Xen > based on errata on 64-bit-incapable CPUs? > Because there is no fscking way we're doing this differently on 32 and 64 bits. Quite frankly the issue is if we should support this under Xen at all, but I think we can do it cleanly. -hpa