From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A68A8C388F9 for ; Mon, 16 Nov 2020 21:25:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56BF420A8B for ; Mon, 16 Nov 2020 21:25:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728990AbgKPVYn (ORCPT ); Mon, 16 Nov 2020 16:24:43 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:59196 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726035AbgKPVYn (ORCPT ); Mon, 16 Nov 2020 16:24:43 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-276-nv8oSO4WPDGtvfEl8EI8Uw-1; Mon, 16 Nov 2020 21:24:38 +0000 X-MC-Unique: nv8oSO4WPDGtvfEl8EI8Uw-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 16 Nov 2020 21:24:37 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Mon, 16 Nov 2020 21:24:37 +0000 From: David Laight To: 'Alexandre Chartre' , Andy Lutomirski CC: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , X86 ML , Dave Hansen , Peter Zijlstra , LKML , Tom Lendacky , Joerg Roedel , "Konrad Rzeszutek Wilk" , "jan.setjeeilers@oracle.com" , Junaid Shahid , "oweisse@google.com" , Mike Rapoport , Alexander Graf , "mgross@linux.intel.com" , "kuzuno@gmail.com" Subject: RE: [RFC][PATCH v2 12/21] x86/pti: Use PTI stack instead of trampoline stack Thread-Topic: [RFC][PATCH v2 12/21] x86/pti: Use PTI stack instead of trampoline stack Thread-Index: AQHWvEQuYUP+foyKVkmjeD/qxWNSTKnLRB5w Date: Mon, 16 Nov 2020 21:24:37 +0000 Message-ID: <985e90259d654d7c9eb74398c5d927ee@AcuMS.aculab.com> References: <20201116144757.1920077-1-alexandre.chartre@oracle.com> <20201116144757.1920077-13-alexandre.chartre@oracle.com> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQWxleGFuZHJlIENoYXJ0cmUNCj4gU2VudDogMTYgTm92ZW1iZXIgMjAyMCAxODoxMA0K PiANCj4gT24gMTEvMTYvMjAgNTo1NyBQTSwgQW5keSBMdXRvbWlyc2tpIHdyb3RlOg0KPiA+IE9u IE1vbiwgTm92IDE2LCAyMDIwIGF0IDY6NDcgQU0gQWxleGFuZHJlIENoYXJ0cmUNCj4gPiA8YWxl eGFuZHJlLmNoYXJ0cmVAb3JhY2xlLmNvbT4gd3JvdGU6DQo+ID4+DQo+ID4+IFdoZW4gZW50ZXJp bmcgdGhlIGtlcm5lbCBmcm9tIHVzZXJsYW5kLCB1c2UgdGhlIHBlci10YXNrIFBUSSBzdGFjaw0K PiA+PiBpbnN0ZWFkIG9mIHRoZSBwZXItY3B1IHRyYW1wb2xpbmUgc3RhY2suIExpa2UgdGhlIHRy YW1wb2xpbmUgc3RhY2ssDQo+ID4+IHRoZSBQVEkgc3RhY2sgaXMgbWFwcGVkIGJvdGggaW4gdGhl IGtlcm5lbCBhbmQgaW4gdGhlIHVzZXIgcGFnZS10YWJsZS4NCj4gPj4gVXNpbmcgYSBwZXItdGFz ayBzdGFjayB3aGljaCBpcyBtYXBwZWQgaW50byB0aGUga2VybmVsIGFuZCB0aGUgdXNlcg0KPiA+ PiBwYWdlLXRhYmxlIGluc3RlYWQgb2YgYSBwZXItY3B1IHN0YWNrIHdpbGwgYWxsb3cgZXhlY3V0 aW5nIG1vcmUgY29kZQ0KPiA+PiBiZWZvcmUgc3dpdGNoaW5nIHRvIHRoZSBrZXJuZWwgc3RhY2sg YW5kIHRvIHRoZSBrZXJuZWwgcGFnZS10YWJsZS4NCj4gPg0KPiA+IFdoeT8NCj4gDQo+IFdoZW4g ZXhlY3V0aW5nIG1vcmUgY29kZSBpbiB0aGUga2VybmVsLCB3ZSBhcmUgbGlrZWx5IHRvIHJlYWNo IGEgcG9pbnQNCj4gd2hlcmUgd2UgbmVlZCB0byBzbGVlcCB3aGlsZSB3ZSBhcmUgdXNpbmcgdGhl IHVzZXIgcGFnZS10YWJsZSwgc28gd2UgbmVlZA0KPiB0byBiZSB1c2luZyBhIHBlci10aHJlYWQg c3RhY2suDQoNCklzbid0IHRoYXQgZ29pbmcgdG8gYWxsb2NhdGUgYSBsb3QgbW9yZSBrZXJuZWwg bWVtb3J5Pw0KDQpJU1RSIHNvbWUgdGhvdWdodHMgYWJvdXQgdXNpbmcgZHluYW1pY2FsbHkgYWxs b2NhdGVkIGtlcm5lbA0Kc3RhY2tzIHdoZW4gKGF0IGxlYXN0IHNvbWUpIHdha2V1cHMgYXJlIGRv bmUgYnkgZGlyZWN0bHkNCnJlc3RhcnRpbmcgdGhlIHN5c3RlbSBjYWxsIC0gc28gdGhhdCB0aGUg c2xlZXBpbmcgdGhyZWFkDQpkb2Vzbid0IGV2ZW4gbmVlZCBhIGtlcm5lbCBzdGFjay4NCihJIGNh bid0IHJlbWVtYmVyIGlmIHRoYXQgd2FzIGxpbnV4IG9yIG9uZSBvZiB0aGUgQlNEcykNCg0KCURh dmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3Vu dCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3 Mzg2IChXYWxlcykNCg==