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,DKIM_SIGNED, DKIM_VALID,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 5CACFC433B4 for ; Wed, 5 May 2021 19:47:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 339B7613B4 for ; Wed, 5 May 2021 19:47:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233505AbhEETrz (ORCPT ); Wed, 5 May 2021 15:47:55 -0400 Received: from mga06.intel.com ([134.134.136.31]:33602 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232642AbhEETrx (ORCPT ); Wed, 5 May 2021 15:47:53 -0400 IronPort-SDR: ISQIuOqnWH7nlBg5Km3efa5st+1dPda5ErfIvxC+AS4dufSArqLHb/kcXBdJTOXDg3tja44kux YvoUMwbqlArQ== X-IronPort-AV: E=McAfee;i="6200,9189,9975"; a="259568799" X-IronPort-AV: E=Sophos;i="5.82,276,1613462400"; d="scan'208";a="259568799" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 May 2021 12:46:56 -0700 IronPort-SDR: HP1GZZrGCi7eyNQWbeavQcEezWj0jPCQGc1rZMkLmHwt8XX/B2ONsv/53JzvvESnTmpCYMe+SU /AU9wHhwmlwg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,276,1613462400"; d="scan'208";a="469098905" Received: from orsmsx602.amr.corp.intel.com ([10.22.229.15]) by orsmga001.jf.intel.com with ESMTP; 05 May 2021 12:46:56 -0700 Received: from orsmsx607.amr.corp.intel.com (10.22.229.20) by ORSMSX602.amr.corp.intel.com (10.22.229.15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Wed, 5 May 2021 12:46:55 -0700 Received: from orsmsx603.amr.corp.intel.com (10.22.229.16) by ORSMSX607.amr.corp.intel.com (10.22.229.20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Wed, 5 May 2021 12:46:55 -0700 Received: from orsedg603.ED.cps.intel.com (10.7.248.4) by orsmsx603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2 via Frontend Transport; Wed, 5 May 2021 12:46:55 -0700 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.177) by edgegateway.intel.com (134.134.137.100) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2106.2; Wed, 5 May 2021 12:46:15 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=jojLvPpSa8EBUVnM2kx6XZI3JEJYbprTByGkAYsumR4I06G2byyjmga5+4Zom38TLMgxuUnZGtGyvA2dLHKebEDdGyFhl30hHet1IiAtNj98r9at9N5AMSyGveAAgCbnXEH/FRsvzC/MMyHoFRYLFW+5u1SF6Nb7+IleQaTnpzLQF5fr7VP9/1MSRiwz8qBUxzLUdsugXWwBL869m6yBuy7QhQsrHQBKmK1ZLL+0Z/HNj1TtYihW+PfRAkdn8VTiCf8tRRL+Py1sUsIEMmQDAWRRiKKFrYnhtsPcFpcngRMJCLcnxlRp9BF4eH6rD2yZ5xJG+awJYcWILtqFxYX/lA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=KWF8zRddkDOmBWv4ZMIrqI0nG/JJ/vUJLv1UoTCthdM=; b=HkSnxVBHiL9F35e3XYcLFkjfhhMZFnIIgoM111Y3/WI+L+wQXSgq6oRrciuzs9MqeQUpVY7ZC16jkp9aI3SbustKBQr5UTkWrXYvHbB1cVf1fUkWn4Xl/INBw5Px9TY63KhLal8X20K71bMCz307YvJMqI0Dv4gBNFhWekc+b+kRCcs/rsTNi/mejkzPeSOS0O7+ai4dIWCd85OnuJEsmH39lHnD/rlZmxEir8+VW0Tz3rlOUrhu6OxzoNH8xMhs9PRvS/r2UJ7CDeNfP++/q/chhin/ugGHThBprgS7FZMZE1DRP5IsOhd4lN8LQ+XqboWshUqgDM5CWumZmBhhcQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel.onmicrosoft.com; s=selector2-intel-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=KWF8zRddkDOmBWv4ZMIrqI0nG/JJ/vUJLv1UoTCthdM=; b=yJOYzu8fm6mhLH8RHhFGixwCruAZk7f/f6LZUIu42R4iQXvxurgE2/PQyj/HSgUHyXLoLKgGMxvTn7Z/MTa++xQtHNajoYn4dJ2DuYGoKnq7HOWSy8ANIkIH0qz6UKC1VQIg4qJLM6rEGDd0pa4L4xTGkfajuHIbu2jOOZNGPR8= Received: from SN6PR11MB3184.namprd11.prod.outlook.com (2603:10b6:805:bd::17) by SN6PR11MB3325.namprd11.prod.outlook.com (2603:10b6:805:b7::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.24; Wed, 5 May 2021 19:46:12 +0000 Received: from SN6PR11MB3184.namprd11.prod.outlook.com ([fe80::e19b:4529:be03:316b]) by SN6PR11MB3184.namprd11.prod.outlook.com ([fe80::e19b:4529:be03:316b%5]) with mapi id 15.20.4108.025; Wed, 5 May 2021 19:46:12 +0000 From: "Edgecombe, Rick P" To: "peterz@infradead.org" , "vbabka@suse.cz" CC: "kernel-hardening@lists.openwall.com" , "Hansen, Dave" , "luto@kernel.org" , "x86@kernel.org" , "linux-mm@kvack.org" , "akpm@linux-foundation.org" , "linux-kernel@vger.kernel.org" , "rppt@kernel.org" , "linux-hardening@vger.kernel.org" , "Weiny, Ira" , "Williams, Dan J" Subject: Re: [PATCH RFC 0/9] PKS write protected page tables Thread-Topic: [PATCH RFC 0/9] PKS write protected page tables Thread-Index: AQHXQUYg7uLEQArpKEKF+xaanI/X46rUu2+AgAANUgCAAINMgA== Date: Wed, 5 May 2021 19:46:12 +0000 Message-ID: <7279fce7e4921be698b3dd33069355f5e8993c8d.camel@intel.com> References: <20210505003032.489164-1-rick.p.edgecombe@intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Evolution 3.38.4 (3.38.4-1.fc33) authentication-results: infradead.org; dkim=none (message not signed) header.d=none;infradead.org; dmarc=none action=none header.from=intel.com; x-originating-ip: [134.134.137.85] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 3de97852-3a0a-4c51-14cb-08d90ffe6fdb x-ms-traffictypediagnostic: SN6PR11MB3325: x-ld-processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr,ExtFwd x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR11MB3184.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(39860400002)(396003)(366004)(136003)(346002)(376002)(26005)(8936002)(66476007)(110136005)(64756008)(66556008)(316002)(54906003)(91956017)(83380400001)(2616005)(478600001)(66446008)(2906002)(36756003)(4326008)(71200400001)(186003)(8676002)(38100700002)(5660300002)(6506007)(53546011)(7416002)(86362001)(122000001)(6486002)(6512007)(76116006)(66946007);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata: =?utf-8?B?Wk9MclpJM3loV0FnL3dqSkdKVTA3UDRmWWRvQXFrUFc2TG51Z1BTVmFhZ0RT?= =?utf-8?B?Mnd0VWxTK2l1UUZjTDhxMllRbnlMUld4dllSY0hQWitpVVNPdWVLMXR5ZXRF?= =?utf-8?B?enRUTnRVcjduTGhweHFWd3kwTlRkVTNHOUwwU2VwTkp5SkpOWXJybitCUSto?= =?utf-8?B?Vk1zaFRKdEthYS8yZS9GREN3Y0tmWXhvRHBnZGdoZU40UWZha09GNjYvWWZQ?= =?utf-8?B?Vk1XQjRzWEFBYzdNYnRaY05wbmhzbHY4bEk5T3RPUCsvWSsyRm00dXUvOGhv?= =?utf-8?B?UnBVampYakc1MXAxRXNyY0ZnakpxYTNNNkQ1cmhvYjNhbmdNZUtYSzNZS1l2?= =?utf-8?B?c3JZN2VoZG1QNk4zaWNUNjNMQ2ZIWXdqbzVwK25rcTN0UmVKN21mZUhRMkRu?= =?utf-8?B?WVg4VDZqL3VmbytXT0YrZ01LQzJBOWcza0pJOWtlNFNLQlpMaVc5Mjg5d2w3?= =?utf-8?B?QmNtVnVRMDhla1NrWnlua2xvK1VjYm5VVndpMk1mOFRvcDg0d3FudHh3M0ZG?= =?utf-8?B?b3hyTmtrdDZHWW1RK0xIRDJrVHpMYXo2YzdpbjZ3a1lWSFlvT25VbmwvOThF?= =?utf-8?B?TTI3SXF2cnVBdWlxdEVzRmpyNDdzajcwYWkyU0tKL0hrUWFzZG13R2hpMkdH?= =?utf-8?B?OE04bmg1bXlOTTBIZUtHTFd0clBFa3pVNExlZnNkcFJIU3Iybi9NeWw4VnpY?= =?utf-8?B?blQ4M3pXb21Xa0EzR29obmdzTFJjK2YrWGZPTVIwT1hyVERsS0U2TFVRcC9F?= =?utf-8?B?b3pveGxYTEtlRU5IY1c5bENtVVBiUUxkb1ZvY3g3QUltU3RPa2pzVkNvL1ox?= =?utf-8?B?bG9JRzExOTN6K0lqVEFUNnNtMEdNSjdwYUo3YlNNSno0eE9XZm5KVmhhL3hQ?= =?utf-8?B?YzBORVV3RXAwdW1qMll0c2xhSUxtWXBESlNVbmFrUEdEbFE2UytjL2c5QVVp?= =?utf-8?B?NWJoTWYrNHpyYXJDanJ6SWowUEJCNytNRndBWUxGY1NQWGVzNmorVUxIUmlF?= =?utf-8?B?bEpNMTg3UzdPM3JrSWFwYjQ3cUxacXBBdFplemNwZnNDTmZmZllTQmVZRUtz?= =?utf-8?B?MmNjbCt1VWxnaTRrbFFBdzlkQ1pSbnlpTDVINURmczBZUkFpeDMxeWZyeCtJ?= =?utf-8?B?UDgxTzZ4VlVLcFNHS1l1NUhzTVpxcC9KbzZad2tHT1NiNktrSzI1MXhtay9P?= =?utf-8?B?RGoyQUVnRzA2VkNyclJjWUplTnV5TDYwVHVqTk84TnRvZjE4SXhFYnpEbWVm?= =?utf-8?B?MktaYjk4OXo5ODJyWVB1Q1kxWDJMRWRzWUc5RWJtejZ0djVyck1sQ1lxcXht?= =?utf-8?B?RGJuaUtPQmZsMXFtaFluYVNCbnlHTUU4R2pSK0M1dlplUlBLSk95TWdib3Zj?= =?utf-8?B?Z1BRTGJrS0l3N1BKaUNYSVFjczdkenlyU01xMzRMaHdGMlpDWFJCU3JxRHl0?= =?utf-8?B?RGdpS1lIK3Q3OHFrMTZ3RmFBdHFQN3VjU3dCbUUvS2NISjVpWUYxZGJzcVhG?= =?utf-8?B?Ny9aL3dUbVQ5SCtMclFYeFMvaGZxS2ltdk04NWFzNnNWRHh2cHFDMVBtL2hw?= =?utf-8?B?bjdVUEhwWE1KOVJmOGEwdGxUV2dvd29QYmVBZVBYczBUWkN1QjJFQWZnSG0x?= =?utf-8?B?c25tZkE5Qkk0bGpOblF4UmE4QnJPc21SOXlEelcrd3pFTXFHRXg4UUtld2xU?= =?utf-8?B?eGFQSnZQWkl4WUlqQzhPVFc0SWFRV1dTMnphMy9NQlBselVjNm54aXZ0dzFE?= =?utf-8?B?bDkyWVBJZkIxMXg2Nkdudk5CdHlmZkJ5cCtGRlE1S1lNMHhZeXBHUjRVRlJM?= =?utf-8?B?WFVRYXFwWnpxeGtaUDlLZz09?= Content-Type: text/plain; charset="utf-8" Content-ID: <4908CABBE349904481BA779577E45C1C@namprd11.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB3184.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3de97852-3a0a-4c51-14cb-08d90ffe6fdb X-MS-Exchange-CrossTenant-originalarrivaltime: 05 May 2021 19:46:12.1704 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: pw3akE6GBB3V9DEmaQMUM1iPoS1E6LHhyBvc+cLjqDZdOI+KuW0gaiuso38bqFTVYuz2lOciExXaFek4Njh84BDNqAIzGLOtcYTbwZlnTZk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR11MB3325 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gV2VkLCAyMDIxLTA1LTA1IGF0IDEzOjU2ICswMjAwLCBQZXRlciBaaWpsc3RyYSB3cm90ZToN Cj4gT24gV2VkLCBNYXkgMDUsIDIwMjEgYXQgMDE6MDg6MzVQTSArMDIwMCwgVmxhc3RpbWlsIEJh YmthIHdyb3RlOg0KPiA+IE9uIDUvNS8yMSAyOjMwIEFNLCBSaWNrIEVkZ2Vjb21iZSB3cm90ZToN Cj4gDQo+ID4gPiBXaHkgdXNlIFBLUyBmb3IgdGhpcz8NCj4gPiA+ID09PT09PT09PT09PT09PT09 PT09PQ0KPiA+ID4gUEtTIGlzIGFuIHVwY29taW5nIENQVSBmZWF0dXJlIHRoYXQgYWxsb3dzIHN1 cGVydmlzb3IgdmlydHVhbA0KPiA+ID4gbWVtb3J5IA0KPiA+ID4gcGVybWlzc2lvbnMgdG8gYmUg Y2hhbmdlZCB3aXRob3V0IGZsdXNoaW5nIHRoZSBUTEIsIGxpa2UgUEtVIGRvZXMNCj4gPiA+IGZv ciB1c2VyIA0KPiA+ID4gbWVtb3J5LiBQcm90ZWN0aW5nIHBhZ2UgdGFibGVzIHdvdWxkIG5vcm1h bGx5IGJlIHJlYWxseSBleHBlbnNpdmUNCj4gPiA+IGJlY2F1c2UgeW91IA0KPiA+ID4gd291bGQg aGF2ZSB0byBkbyBpdCB3aXRoIHBhZ2luZyBpdHNlbGYuIFBLUyBoZWxwcyBieSBwcm92aWRpbmcg YQ0KPiA+ID4gd2F5IHRvIHRvZ2dsZSANCj4gPiA+IHRoZSB3cml0YWJpbGl0eSBvZiB0aGUgcGFn ZSB0YWJsZXMgd2l0aCBqdXN0IGEgcGVyLWNwdSBNU1IuDQo+ID4gDQo+ID4gSSBjYW4gc2VlIGlu IHBhdGNoIDgvOSB0aGF0IHlvdSBhcmUgZmxpcHBpbmcgdGhlIE1TUiBhcm91bmQNCj4gPiBpbmRp dmlkdWFsDQo+ID4gb3BlcmF0aW9ucyBvbiBwYWdlIHRhYmxlIGVudHJpZXMuIEluIG15IHBhdGNo IEkgaG9va2VkIG1ha2luZyB0aGUNCj4gPiBwYWdlIHRhYmxlDQo+ID4gd3JpdGFibGUgdG8gb2J0 YWluaW5nIHRoZSBwYWdlIHRhYmxlIGxvY2sgKElJUkMgSSBoYWQgb25seSB0aGUgUFRFDQo+ID4g bGV2ZWwgZnVsbHkNCj4gPiBoYW5kbGVkIHRob3VnaCkuIFdvbmRlciBpZiB0aGF0IHdvdWxkIGJl IGJldHRlciB0cmFkZW9mZiBldmVuIGZvcg0KPiA+IHlvdXIgTVNSIGFwcHJvYWNoPw0KPiANCkht bSwgSSBzZWUsIHRoYXQgY291bGQgcmVkdWNlIHRoZSBzcHJpbmtsaW5nIG9mIHRoZSBlbmFibGUv ZGlzYWJsZQ0KY2FsbHMuIEl0IHNlZW1zIHNvbWUobW9zdD8pIG9mIHRoZSBrZXJuZWwgYWRkcmVz cyBzcGFjZSBwYWdlIHRhYmxlDQptb2RpZmljYXRpb24gZG9uJ3QgdGFrZSB0aGUgcGFnZSB0YWJs ZSBsb2NrcyB0aG91Z2ggc28gdGhvc2UgY2FsbGVycw0Kd291bGQgaGF2ZSB0byBjYWxsIHNvbWV0 aGluZyBlbHNlIHRvIGJlIGFibGUgdG8gd3JpdGUuDQoNCj4gVGhlcmUncyBhbHNvIHRoZSBISUdI UFRFIGNvZGUgd2UgY291bGQgYWJ1c2UgdG8ga21hcCBhbiBhbGlhcyB3aGlsZQ0KPiB3ZSdyZSBh dCBpdC4NCg0KRm9yIGEgbm9uLVBLUyBkZWJ1ZyBmZWF0dXJlPw0KDQpJdCBtaWdodCBmaXQgcHJl dHR5IGVhc2lseSBpbnRvIENPTkZJR19ERUJVR19QQUdFQUxMT0Mgb24gdG9wIG9mIHRoaXMNCnNl cmllcy4gZW5hYmxlL2Rpc2FibGVfcGd0YWJsZV93cml0ZSgpIGNvdWxkIHRha2UgYSBwb2ludGVy IHRoYXQgaXMNCmlnbm9yZWQgaW4gUEtTIG1vZGUsIGJ1dCB0cmlnZ2VycyBhIGNwYSBjYWxsIGlu IGENCkNPTkZJR19ERUJVR19QQUdFVEFCTEVfV1JJVEUgbW9kZS4NCg==