Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C532C61DA4 for ; Wed, 22 Feb 2023 13:56:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229653AbjBVN4t (ORCPT ); Wed, 22 Feb 2023 08:56:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42584 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229615AbjBVN4r (ORCPT ); Wed, 22 Feb 2023 08:56:47 -0500 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5299D3801D for ; Wed, 22 Feb 2023 05:56:46 -0800 (PST) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-206-sdCVamJYOHihlMTsH2h34w-1; Wed, 22 Feb 2023 13:56:43 +0000 X-MC-Unique: sdCVamJYOHihlMTsH2h34w-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.47; Wed, 22 Feb 2023 13:56:41 +0000 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.047; Wed, 22 Feb 2023 13:56:41 +0000 From: David Laight To: 'Borislav Petkov' , KP Singh CC: Pawan Gupta , "linux-kernel@vger.kernel.org" , "pjt@google.com" , "evn@google.com" , "jpoimboe@kernel.org" , "tglx@linutronix.de" , "x86@kernel.org" , "hpa@zytor.com" , "peterz@infradead.org" , "kim.phillips@amd.com" , "alexandre.chartre@oracle.com" , "daniel.sneddon@linux.intel.com" , "corbet@lwn.net" , "bp@suse.de" , "linyujun809@huawei.com" , "jmattson@google.com" , =?utf-8?B?Sm9zw6kgT2xpdmVpcmE=?= , Rodrigo Branco , Alexandra Sandulescu , "stable@vger.kernel.org" Subject: RE: [PATCH v2 1/2] x86/speculation: Allow enabling STIBP with legacy IBRS Thread-Topic: [PATCH v2 1/2] x86/speculation: Allow enabling STIBP with legacy IBRS Thread-Index: AQHZRrnENHDoHoAiDEivYbQVDCYqo67a/I1Q Date: Wed, 22 Feb 2023 13:56:40 +0000 Message-ID: <2cfb89db3cfb418cb3e929b1c0d80ee5@AcuMS.aculab.com> References: <20230221184908.2349578-1-kpsingh@kernel.org> <20230222030728.v4ldlndtnx6gqd6x@desk> 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 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 RnJvbTogQm9yaXNsYXYgUGV0a292DQo+IFNlbnQ6IDIyIEZlYnJ1YXJ5IDIwMjMgMTI6MzMNCj4g DQo+IE9uIFR1ZSwgRmViIDIxLCAyMDIzIGF0IDA5OjQ5OjU3UE0gLTA4MDAsIEtQIFNpbmdoIHdy b3RlOg0KPiA+IFRoYXQgaXMgYSBiaXQgbW9yZSBjb21wbGljYXRlZCBhcywgZm9yIG5vdywgdGhl IHVzZXIgaXMgbm90IHJlYWxseQ0KPiA+IGV4cG9zZWQgdG8gU1RJQlAgZXhwbGljaXRseSB5ZXQu DQo+IA0KPiBSZW1lbWJlciB0aGF0IHdlJ3JlIGV4cG9zaW5nIHRoZSBub3JtYWwgdXNlciB0byBh IGdhemlsbGlvbiBzd2l0Y2hlcw0KPiBhbHJlYWR5LiBBbmQgbm90IGV2ZXJ5IHVzZXIgaGFzIGRv bmUgYSBQaEQgaW4gaHcgdnVsbnMgbGlrZSB3ZSB3ZXJlDQo+IGZvcmNlZCB0byBpbiB0aGUgbGFz dCwgYXQgbGVhc3QgNSwgeWVhcnMuDQoNCkl0IGlzIGFsc28gd29ydGggZXhwbGFpbmluZyB0aGUg YWNyb255bXMgYW5kIHdoYXQgdGhlIG1pdGlnYXRpb25zDQphY3R1YWxseSBkby4NClRoZXJlIGFy ZSBhbHNvIHRoZSBiaWcgZmFtaWx5IHdoZXJlIGRpc2FibGluZyBoeXBlcnRocmVhZGluZw0KaXMg cHJvYmFibHkgYSBiZXR0ZXIgd2F5IHRvIGF2b2lkIHRoZSB2dWxuZXJhYmlsaXR5Lg0KDQoJRGF2 aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50 IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTcz ODYgKFdhbGVzKQ0K