From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966114Ab3DRIr3 (ORCPT ); Thu, 18 Apr 2013 04:47:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:11810 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965897Ab3DRIr1 (ORCPT ); Thu, 18 Apr 2013 04:47:27 -0400 Date: Thu, 18 Apr 2013 10:48:10 +0300 From: "Michael S. Tsirkin" To: KY Srinivasan Cc: Jan Beulich , "olaf@aepfle.de" , "bp@alien8.de" , "apw@canonical.com" , "x86@kernel.org" , "tglx@linutronix.de" , "devel@linuxdriverproject.org" , "gregkh@linuxfoundation.org" , "jasowang@redhat.com" , "linux-kernel@vger.kernel.org" , "hpa@zytor.com" Subject: Re: [PATCH 2/3] X86: Add a check to catch Xen emulation of Hyper-V Message-ID: <20130418074810.GI13787@redhat.com> References: <20130417070616.GA4487@redhat.com> <423ae84de75f4b3587eb2d1a365cbd95@SN2PR03MB061.namprd03.prod.outlook.com> <20130417124852.GD6801@redhat.com> <3b76ebfdb240419aa601309465a4c154@SN2PR03MB061.namprd03.prod.outlook.com> <20130417132523.GB26157@redhat.com> <9ffd83acf6ac4a7bb5d51c95c96e6f50@SN2PR03MB061.namprd03.prod.outlook.com> <20130417134850.GB26335@redhat.com> <0cd5cde572734ea786664accc1a40bea@SN2PR03MB061.namprd03.prod.outlook.com> <516EE0FE02000078000CE422@nat28.tlf.novell.com> <76ae3b714d064ae392332615bfd872d5@SN2PR03MB061.namprd03.prod.outlook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <76ae3b714d064ae392332615bfd872d5@SN2PR03MB061.namprd03.prod.outlook.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 17, 2013 at 04:28:36PM +0000, KY Srinivasan wrote: > > > > -----Original Message----- > > From: Jan Beulich [mailto:JBeulich@suse.com] > > Sent: Wednesday, April 17, 2013 11:51 AM > > To: KY Srinivasan; Michael S. Tsirkin > > Cc: olaf@aepfle.de; bp@alien8.de; apw@canonical.com; x86@kernel.org; > > tglx@linutronix.de; devel@linuxdriverproject.org; gregkh@linuxfoundation.org; > > jasowang@redhat.com; linux-kernel@vger.kernel.org; hpa@zytor.com > > Subject: RE: [PATCH 2/3] X86: Add a check to catch Xen emulation of Hyper-V > > > > >>> On 17.04.13 at 17:31, KY Srinivasan wrote: > > > If Xen were to change where it would not unconditionally emulate Hyper-V, I > > > would not be opposed to taking > > > this check out. > > > > But it doesn't do this unconditionally, only upon admin request. > > >From the discussion we had a couple of months ago, the default setting was to enable > Hyper-V emulation for all guests. If this is not the case, we ought to be able to drop this. > However, I think it is not reasonable to add additional checks (in addition to hypervisor check) > to customize the run-time in the guest for the specific Hypervisor. > > Regards, > > K. Y Parse error. What are you trying to say? I'm just saying it's best to do things in the way that make it possible for Xen to implement hyperv in a more complete way in the future and have things just work and in a way that does not change guest/hypervisor interface. > > > > Jan > > > > >