From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755289Ab3DQQbN (ORCPT ); Wed, 17 Apr 2013 12:31:13 -0400 Received: from mail-bn1lp0152.outbound.protection.outlook.com ([207.46.163.152]:23458 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752314Ab3DQQbL convert rfc822-to-8bit (ORCPT ); Wed, 17 Apr 2013 12:31:11 -0400 X-Forefront-Antispam-Report-Untrusted: CIP:157.56.240.21;KIP:(null);UIP:(null);(null);H:BL2PRD0310HT001.namprd03.prod.outlook.com;R:internal;EFV:INT X-SpamScore: -2 X-BigFish: PS-2(zz98dI9371I542I1432Izz1f42h1fc6h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ahzz8275bhz31h2a8h668h839h944hd24hf0ah1220h1288h12a5h12a9h12bdh137ah13b6h1441h1504h1537h153bh162dh1631h1758h18e1h1946h19b5h19ceh1ad9h1b0ah9a9j1155h) X-Forefront-Antispam-Report-Untrusted: SFV:SKI;SFS:;DIR:OUT;SFP:;SCL:-1;SRVR:SN2PR03MB062;H:SN2PR03MB061.namprd03.prod.outlook.com;LANG:en; From: KY Srinivasan To: Jan Beulich , "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 Thread-Topic: [PATCH 2/3] X86: Add a check to catch Xen emulation of Hyper-V Thread-Index: AQHOAnJoFJQhzmD3TUKsF9dq+4jlRZjabzYAgABndUD///hDAIAAE9LQ///2YoCAABF4gP//9RUAAANR4jAAAPGWAAAA7LQA Date: Wed, 17 Apr 2013 16:28:36 +0000 Message-ID: <76ae3b714d064ae392332615bfd872d5@SN2PR03MB061.namprd03.prod.outlook.com> References: <1359940910-32114-1-git-send-email-kys@microsoft.com> <1359940959-32168-1-git-send-email-kys@microsoft.com> <1359940959-32168-2-git-send-email-kys@microsoft.com> <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> In-Reply-To: <516EE0FE02000078000CE422@nat28.tlf.novell.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [98.110.61.163] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-OrganizationHeadersPreserved: SN2PR03MB062.namprd03.prod.outlook.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%LINUXFOUNDATION.ORG$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%LINUXDRIVERPROJECT.ORG$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%LINUTRONIX.DE$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%ZYTOR.COM$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%VGER.KERNEL.ORG$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%REDHAT.COM$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%AEPFLE.DE$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%SUSE.COM$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%KERNEL.ORG$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%CANONICAL.COM$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-FOPE-CONNECTOR: Id%59$Dn%ALIEN8.DE$RO%2$TLS%6$FQDN%corpf5vips-237160.customer.frontbridge.com$TlsDn% X-CrossPremisesHeadersPromoted: TK5EX14MLTC102.redmond.corp.microsoft.com X-CrossPremisesHeadersFiltered: TK5EX14MLTC102.redmond.corp.microsoft.com X-Forefront-Antispam-Report: CIP:131.107.125.37;CTRY:US;IPV:CAL;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(13464002)(51704004)(377454001)(199002)(189002)(24454001)(76482001)(81542001)(65816001)(53806001)(56816002)(54356001)(54316002)(63696002)(77982001)(56776001)(46102001)(16676001)(51856001)(59766001)(4396001)(50986001)(50466001)(49866001)(47976001)(47776003)(5343635001)(79102001)(20776003)(31966008)(69226001)(74502001)(66066001)(80022001)(47446002)(81342001)(47736001)(74662001)(23726002)(33646001)(46406003)(6806003)(24736002);DIR:OUT;SFP:;SCL:1;SRVR:BN1BFFO11HUB010;H:TK5EX14MLTC102.redmond.corp.microsoft.com;RD:InfoDomainNonexistent;A:1;MX:1;LANG:en; X-OriginatorOrg: microsoft.onmicrosoft.com X-Forefront-PRVS: 081904387B Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----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 > > Jan > >