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 C48FCC433E0 for ; Wed, 3 Mar 2021 18:43:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 864D164EE1 for ; Wed, 3 Mar 2021 18:43:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1835780AbhCCSEu (ORCPT ); Wed, 3 Mar 2021 13:04:50 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:28737 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1381057AbhCCPcX (ORCPT ); Wed, 3 Mar 2021 10:32:23 -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-129-p7FEIIrCNG6cb_3HeC64uw-1; Wed, 03 Mar 2021 15:29:45 +0000 X-MC-Unique: p7FEIIrCNG6cb_3HeC64uw-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; Wed, 3 Mar 2021 15:29:37 +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; Wed, 3 Mar 2021 15:29:37 +0000 From: David Laight To: 'Linus Walleij' , Will Deacon CC: Jian Cai , Nick Desaulniers , Manoj Gupta , Luis Lozano , clang-built-linux , Nathan Chancellor , Russell King , Catalin Marinas , James Morris , "Serge E. Hallyn" , Arnd Bergmann , Masahiro Yamada , Kees Cook , Ard Biesheuvel , =?utf-8?B?QW5kcmVhcyBGw6RyYmVy?= , "Ingo Molnar" , Marc Zyngier , Andrew Morton , Mike Rapoport , Mark Rutland , David Brazdil , James Morse , Linux ARM , Linux Kernel Mailing List , "linux-security-module@vger.kernel.org" Subject: RE: [PATCH v4] ARM: Implement SLS mitigation Thread-Topic: [PATCH v4] ARM: Implement SLS mitigation Thread-Index: AQHXEECBQRoTQnOC90iuKvtWWC/yz6pyYx/A Date: Wed, 3 Mar 2021 15:29:37 +0000 Message-ID: <49e8725f29ab4ecda6d669e9216bca29@AcuMS.aculab.com> References: <20210219201852.3213914-1-jiancai@google.com> <20210219230841.875875-1-jiancai@google.com> <20210222115816.GA8605@willie-the-truck> <20210223100453.GB10254@willie-the-truck> 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 RnJvbTogTGludXMgV2FsbGVpag0KPiBTZW50OiAwMyBNYXJjaCAyMDIxIDE1OjE5DQo+IA0KPiBP biBUdWUsIEZlYiAyMywgMjAyMSBhdCAxMTowNSBBTSBXaWxsIERlYWNvbiA8d2lsbEBrZXJuZWwu b3JnPiB3cm90ZToNCj4gPiBPbiBNb24sIEZlYiAyMiwgMjAyMSBhdCAwMTo1MDowNlBNIC0wODAw LCBKaWFuIENhaSB3cm90ZToNCj4gPiA+IEkgYW0gbm90IHN1cmUgaWYgdGhlcmUgYXJlIGFueSBw bGFucyB0byBwcm90ZWN0IGFzc2VtYmx5IGNvZGUgYW5kIEkNCj4gPiA+IHdpbGwgbGVhdmUgaXQg dG8gdGhlIEFybSBmb2xrcyBzaW5jZSB0aGV5IGtub3cgYSB3aG9sZSBsb3QgYmV0dGVyLiBCdXQN Cj4gPiA+IGV2ZW4gd2l0aG91dCB0aGF0IHBhcnQsIHdlIHNob3VsZCBzdGlsbCBoYXZlIGJldHRl ciBwcm90ZWN0aW9uLA0KPiA+ID4gZXNwZWNpYWxseSB3aGVuIG92ZXJoZWFkIGRvZXMgbm90IGxv b2sgdG9vIGJhZDogSSBkaWQgc29tZSBwcmVsaW1pbmFyeQ0KPiA+ID4gZXhwZXJpbWVudHMgb24g Q2hyb21lT1MsIGNvZGUgc2l6ZSBvZiB2bWxpbnV4IGluY3JlYXNlZCAzJSwgYW5kIHRoZXJlDQo+ ID4gPiB3ZXJlIG5vIG5vdGljZWFibGUgY2hhbmdlcyB0byBydW4tdGltZSBwZXJmb3JtYW5jZSBv ZiB0aGUgYmVuY2htYXJrcyBJDQo+ID4gPiB1c2VkLg0KPiA+DQo+ID4gSWYgdGhlIG1pdGlnYXRp b24gaXMgcmVxdWlyZWQsIEknbSBub3Qgc3VyZSBJIHNlZSBhIGxvdCBvZiBwb2ludCBpbiBvbmx5 DQo+ID4gZG9pbmcgYSBoYWxmLWJha2VkIGpvYiBvZiBpdC4gSXQgZmVlbHMgYSBiaXQgbGlrZSBh IGJveC10aWNraW5nIGV4ZXJjaXNlLA0KPiA+IGluIHdoaWNoIGNhc2UgYW55IG92ZXJoZWFkIGlz IHRvbyBtdWNoLg0KPiANCj4gSSB3cm90ZSBzb21lIHN1Z2dlc3Rpb25zIG9uIGZvbGxvdy11cHMg aW4gbXkgcmVwbHksIGFuZCBJIGNhbg0KPiBoZWxwIG91dCBkb2luZyBzb21lIG9mIHRoZSBwYXRj aGVzLCBJIHRoaW5rLg0KPiANCj4gU2luY2UgQVJNMzIgUkVUIGlzIG1vdiBwYywgPD4NCj4gZ2l0 IGdyZXAgJ21vdi4qcGMsJyB8IHdjIC1sIGdpdmVzIDkzIHNpdGVzIGluIGFyY2gvYXJtLg0KPiBJ IHN1cHBvc2UgdGhlc2UgbmVlZCB0byBjb21lIG91dDoNCj4gDQo+IG1vdiBwYywgbHINCj4gZHNi KG5zaCk7DQo+IGlzYigpOw0KDQpXb24ndCB0aGF0IGdvIGhvcnJpYmx5IHdyb25nIGZvciBjb25k aXRpb25hbCByZXR1cm5zPw0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2Vz aWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVL DQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K