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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i1-20020a170902c94100b001b3ce5b5415si1449408pla.401.2023.06.12.04.40.53; Mon, 12 Jun 2023 04:41:08 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233493AbjFLLiV (ORCPT + 99 others); Mon, 12 Jun 2023 07:38:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234292AbjFLLh6 (ORCPT ); Mon, 12 Jun 2023 07:37:58 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90D5C7D9C for ; Mon, 12 Jun 2023 04:22:29 -0700 (PDT) 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-261-YAv902QKNE-1ixxPiO8tQA-1; Mon, 12 Jun 2023 12:22:27 +0100 X-MC-Unique: YAv902QKNE-1ixxPiO8tQA-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Mon, 12 Jun 2023 12:22:15 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Mon, 12 Jun 2023 12:22:15 +0100 From: David Laight To: 'Borislav Petkov' , Breno Leitao CC: "tglx@linutronix.de" , "pawan.kumar.gupta@linux.intel.com" , "paul@paul-moore.com" , "leit@meta.com" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH] cpu/bugs: Disable CPU mitigations at compilation time Thread-Topic: [PATCH] cpu/bugs: Disable CPU mitigations at compilation time Thread-Index: AQHZmviQI/r0/Sv4xEqYGehxHbaKRa+HB92A Date: Mon, 12 Jun 2023 11:22:15 +0000 Message-ID: <543116e1a8cf4b7a8b086c850374f99e@AcuMS.aculab.com> References: <20230203120615.1121272-1-leitao@debian.org> <20230609173343.GDZINid4EgJGnkW7HK@fat_crate.local> In-Reply-To: <20230609173343.GDZINid4EgJGnkW7HK@fat_crate.local> 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 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQm9yaXNsYXYgUGV0a292DQo+IFNlbnQ6IDA5IEp1bmUgMjAyMyAxODozNA0KPiANCj4g T24gRnJpLCBGZWIgMDMsIDIwMjMgYXQgMDQ6MDY6MTVBTSAtMDgwMCwgQnJlbm8gTGVpdGFvIHdy b3RlOg0KPiA+IFJpZ2h0IG5vdyBpdCBpcyBub3QgcG9zc2libGUgdG8gZGlzYWJsZSBDUFUgdnVs bmVyYWJpbGl0aWVzIG1pdGlnYXRpb25zDQo+ID4gYXQgYnVpbGQgdGltZS4gTWl0aWdhdGlvbiBu ZWVkcyB0byBiZSBkaXNhYmxlZCBwYXNzaW5nIGtlcm5lbA0KPiA+IHBhcmFtZXRlcnMsIHN1Y2gg YXMgJ21pdGlnYXRpb25zPW9mZicuDQo+ID4NCj4gPiBDcmVhdGUgYSBuZXcgY29uZmlnIG9wdGlv biAoQ09ORklHX0NQVV9NSVRJR0FUSU9OU19ERUZBVUxUX09GRikgdGhhdA0KPiA+IHNldHMgdGhl IGdsb2JhbCB2YXJpYWJsZSBgY3B1X21pdGlnYXRpb25zYCB0byBPRkYsIGluc3RlYWQgb2YgQVVU Ty4gVGhpcw0KPiA+IGFsbG93cyB0aGUgY3JlYXRpb24gb2Yga2VybmVsIGJpbmFyaWVzIHRoYXQg Ym9vdHMgd2l0aCB0aGUgQ1BVDQo+ID4gbWl0aWdhdGlvbnMgdHVybmVkIG9mZiBieSBkZWZhdWx0 LCBhbmQgZG9lcyBub3QgcmVxdWlyZSBkZWFsaW5nIGtlcm5lbA0KPiA+IHBhcmFtZXRlcnMuDQo+ IA0KPiBXaGF0J3MgdGhlIHJlYWwtbGlmZSB1c2UgY2FzZSBmb3IgdGhpcz8NCg0KSSBjYW4gZGVm aW5pdGVseSBqdXN0aWZ5IGNvbXBpbGluZyB0aGVtIGFsbCBvdXQuDQpGb3IgaW5zdGFuY2UgZW1i ZWRkZWQgc3lzdGVtcyB3aXRoIGxpbWl0ZWQgdXNlcnNwYWNlIGFuZA0KKHByZXR0eSBtdWNoKSBl dmVyeXRoaW5nIHJ1bm5pbmcgYXMgcm9vdC4NCg0KQ29tcGlsaW5nIHRoZW0gb3V0IGdpdmVzIGJl dHRlciBjb2RlIHRoYW4gcGF0Y2hpbmcgdGhlbSBvdXQNCmR1cmluZyBib290Lg0KSSd2ZSBzdG9w cGVkIHVwZGF0aW5nIGFuIExUUyBrZXJuZWwgYmVjYXVzZSBJIHJlYWxseSBkb24ndA0Kd2FudC9u ZWVkIGFueSBvZiB0aGUgbWl0aWdhdGlvbnMgLSBlc3BlY2lhbGx5IHRoZSBvbmVzDQphc3NvY2lh dGVkIHdpdGggJ3JldCcgaW5zdHJ1Y3Rpb25zLg0KVGhleSBhcmUgZmFyIG1vcmUgcGVydmFzaXZl IHRoYW4gdGhlIG9uZXMgZm9yIGluZGlyZWN0IGp1bXBzLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0 ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBL ZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K