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 5B787C4743C for ; Mon, 7 Jun 2021 03:51:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32F67611C0 for ; Mon, 7 Jun 2021 03:51:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230246AbhFGDw4 (ORCPT ); Sun, 6 Jun 2021 23:52:56 -0400 Received: from mga12.intel.com ([192.55.52.136]:11120 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230127AbhFGDwz (ORCPT ); Sun, 6 Jun 2021 23:52:55 -0400 IronPort-SDR: tGz1TawEHOHwP++fkK/QZdT8NU8CkkVag/TTiRvRXKauqeTXMVwvswoFFfcrxDLCIdD0EtQ1Z0 laPO9PzV6wjA== X-IronPort-AV: E=McAfee;i="6200,9189,10007"; a="184237423" X-IronPort-AV: E=Sophos;i="5.83,254,1616482800"; d="scan'208";a="184237423" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Jun 2021 20:50:58 -0700 IronPort-SDR: vihYOprQ0xPonVf/MqttbddJoucKykUrf+9zqaL7+K8B0tZG1HRFNN1KaxYfy7ggFdi/JgY+1g AEYA7bHWNT+A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,254,1616482800"; d="scan'208";a="468949988" Received: from orsmsx604.amr.corp.intel.com ([10.22.229.17]) by fmsmga004.fm.intel.com with ESMTP; 06 Jun 2021 20:50:58 -0700 Received: from orsmsx607.amr.corp.intel.com (10.22.229.20) by ORSMSX604.amr.corp.intel.com (10.22.229.17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2242.4; Sun, 6 Jun 2021 20:50:57 -0700 Received: from orsmsx601.amr.corp.intel.com (10.22.229.14) 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 15.1.2242.4; Sun, 6 Jun 2021 20:50:57 -0700 Received: from ORSEDG601.ED.cps.intel.com (10.7.248.6) by orsmsx601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2242.4 via Frontend Transport; Sun, 6 Jun 2021 20:50:57 -0700 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.174) by edgegateway.intel.com (134.134.137.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2242.4; Sun, 6 Jun 2021 20:50:56 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=FhSWIDznk61QT9FbU4HHVLOow/mB+PL53/SsxTJSYRWQTR5cEJfPwNvX0eiyDBN0G/LHWnFrVhFtlwpn4WgGUEcDZWZHRTRdOE+3o0KOmAACIIKmw2J2n5NdwjM4Wnrja5QxIHyONuorlaaDLU3ixwWNbl/hBigAOV144ISVfLvmBPSRk3+T/haq+dq+be0WzAH3TXA/Km7jM0txmMvF04fI//gujQGQE0lpI8o+qDoSAV4uVND1u0huIRccItRfcVkvzKyOmiE2GdMvm71HPeW2YeEfvebLkJPaJWnhKxDUCFUHDU1xCnsNxMAE7oKyNsWOHzBx3sTrEvTPIb5Ffg== 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=sWs6WICC/G6I9jJx7wmbUk4UcsQolsp3jHtYBFeeHYQ=; b=CxyJROGy6/bIfyu/p9/eEtj7GufW44rY1kPwWSTEWBOoCthDYAl9DoSCvVZ/tPa20jUgeqSP//vhvpP9x5Ep16YzVneF+SwB6LxOCCUkNTgsK9Z+nd0uWmpDkwgUnmI5XapvZ5Q5fEcJM2udO9vdj5j8KTMVQTcV8lflb4Ot/4bZ1WWldynCIVFizLnsxLanGF0EvShbWf3UyWeexPCIJptnFlJAAO3B4wipXsgOdnL/C25LFr9MC7pdxnZ+B+djaqRQFrhJJYjJ7n+XXkCwP8Vyneo2s4uw6/cC+jBTHDK9iCX8L+xWq4gtjvnZEYnYfaJ/h+qiaI1vAjwa7r0Kfw== 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=sWs6WICC/G6I9jJx7wmbUk4UcsQolsp3jHtYBFeeHYQ=; b=I2ePOrI9RAxR1O/x/kmQRMTC4gohkK45IpzejKHfZrbdYYCgtoT4SoQj1ZTzpNctxVPhboFDJP5sOsR7nAsgFEvqS9hK81EoIMp4oi4vmL8I5/q65ZnO6+cF6kBBqerVPmdpk/TzuT5ZqDCxup+Vby8odUfwaIfuFGoOqPtKsAU= Received: from MWHPR11MB1886.namprd11.prod.outlook.com (2603:10b6:300:110::9) by CO1PR11MB5140.namprd11.prod.outlook.com (2603:10b6:303:95::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.23; Mon, 7 Jun 2021 03:50:54 +0000 Received: from MWHPR11MB1886.namprd11.prod.outlook.com ([fe80::6597:eb05:c507:c6c1]) by MWHPR11MB1886.namprd11.prod.outlook.com ([fe80::6597:eb05:c507:c6c1%12]) with mapi id 15.20.4195.030; Mon, 7 Jun 2021 03:50:54 +0000 From: "Tian, Kevin" To: Paolo Bonzini , Jason Gunthorpe CC: Alex Williamson , Jean-Philippe Brucker , "Jiang, Dave" , "Raj, Ashok" , "kvm@vger.kernel.org" , Jonathan Corbet , Robin Murphy , LKML , "iommu@lists.linux-foundation.org" , David Gibson , Kirti Wankhede , "David Woodhouse" , Jason Wang Subject: RE: [RFC] /dev/ioasid uAPI proposal Thread-Topic: [RFC] /dev/ioasid uAPI proposal Thread-Index: AddSzQ970oLnVHLeQca/ysPD8zMJZwBL2ymAAKTbxpAAKSt7gAAHpf9wAB1YcAAAAm5sgAAA1YgAAADonIAAAEmcgAABzCaAAAHbfwAAAYTsAAAEeLUAAAiRJwAAFF14gAAPozMAAABMSwAAA0bJgAAVeTBAAAlp0QAABjX0AAAAf0IAAABWuQAAAD8IgAAAOC4AAABA0oAAAn0sgAAbQLqAAF5vapA= Date: Mon, 7 Jun 2021 03:50:54 +0000 Message-ID: References: <20210603201018.GF1002214@nvidia.com> <20210603154407.6fe33880.alex.williamson@redhat.com> <20210604122830.GK1002214@nvidia.com> <20210604092620.16aaf5db.alex.williamson@redhat.com> <815fd392-0870-f410-cbac-859070df1b83@redhat.com> <20210604155016.GR1002214@nvidia.com> <30e5c597-b31c-56de-c75e-950c91947d8f@redhat.com> <20210604160336.GA414156@nvidia.com> <2c62b5c7-582a-c710-0436-4ac5e8fd8b39@redhat.com> <20210604172207.GT1002214@nvidia.com> <2d1ad075-bec6-bfb9-ce71-ed873795e973@redhat.com> In-Reply-To: <2d1ad075-bec6-bfb9-ce71-ed873795e973@redhat.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-version: 11.5.1.3 dlp-product: dlpe-windows dlp-reaction: no-action authentication-results: redhat.com; dkim=none (message not signed) header.d=none;redhat.com; dmarc=none action=none header.from=intel.com; x-originating-ip: [101.80.65.46] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: bf0c5a33-a244-470a-7880-08d929677383 x-ms-traffictypediagnostic: CO1PR11MB5140: x-ld-processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; 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:MWHPR11MB1886.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(396003)(376002)(366004)(39860400002)(346002)(136003)(7696005)(316002)(64756008)(66476007)(7416002)(26005)(186003)(66556008)(66446008)(86362001)(4326008)(52536014)(5660300002)(71200400001)(66946007)(110136005)(54906003)(6506007)(33656002)(53546011)(76116006)(478600001)(55016002)(9686003)(83380400001)(8936002)(8676002)(122000001)(2906002)(38100700002);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata: =?utf-8?B?bzhvRElSVHg3cHUxMEZjNlJ2dnh2NjNJOG1PWkwrOTZkV21Ld2hxYzd6Sm5H?= =?utf-8?B?WWpTcFQ4QUVEOXVzS21MUngzK3d1eWRpUVV4bzBLRUN6ZjBNWDBMOExsemZ4?= =?utf-8?B?OFVTS1pGbUIvQWcrTC9ES1ZLV1NOWGVmRmM2N1dKblhTQzNDRVhET1NtSHRq?= =?utf-8?B?ZHQvTS82Z1BiaFFXb0NXNEF5RlNGSS9Ub2czNGVLT243WnpPWjdHQkNRYWk0?= =?utf-8?B?ZUVLbldudkUwRFNGTGM4UmllRVd0ajgrNFpXQkJEV0d3TTZSSVRrY1BSTk4y?= =?utf-8?B?NW5vaXVFWHpOdkkvU0V5bFlDM2dUVDJ3dGNQU2d0bTdjT2hMNlZTN0xSWnJp?= =?utf-8?B?dU1Ma3JObUZnTkhmSEpMa0tKS1YyM0pZWkJmR3lDS2J0VEppMW1qSXYvU0JU?= =?utf-8?B?MEl0RXk1TVQzY2oweVI4UWlzS2dhYW1lZVIyUXhNOUZmN1J2Q2QxQjd3TVBP?= =?utf-8?B?aDVlazZFSmlzSDZyY0ljUWxLeXVUMThrbXUyZ0gyOTVqcVZxU1UxV3VqQUd5?= =?utf-8?B?WGhVMVhTVzhIV3pLWlkwNVJqd01teEtQZ2ZveHJWRTcvOGQ2QWJTVkVCK1hH?= =?utf-8?B?Qk1BV1RsdEtlVTlVdG1rZ2V0cnJwYXQybVBDTWJMQ1JFbWczSVRLVVhvVFh5?= =?utf-8?B?cUM1ZHU5dHE1TWd1TmFOWnZhRVlOaEhkOFZXcFBEQjhqUS9NcTlPa2ZQUnJO?= =?utf-8?B?bTh1MS84ZEVYbk1NWCtoMzliNXB4b09YU0crQ0YvVWZQZG54bXZCNG81aFdN?= =?utf-8?B?UFJZSnBNTUdRTkYzR0wxNDhmOG1KMEh1VWpHRWdVZERPQ1lWbUxLOUoxZWJ4?= =?utf-8?B?S2lDNm50d0JaZG9OcXhrTkVLWjVGMCtvajcxa0N0T0hiMjRxQWZHUS83Z0ly?= =?utf-8?B?a2xqM2xCMFFXdzlRME5tY3podzQ4aG14YkxhTGttZW9LSXd3Tjg5RCtPemFs?= =?utf-8?B?VWc2dEJBN2JRRFpvTmJSWllFRStsUHk2aGxKTFlnL3h5bFU5MDlpQVF6MlVj?= =?utf-8?B?SDdpcmp6dGtmWXRiMTdQVWI1UWVTclloM2pZT0VVZ1BEUjRQN0tUTU9kaGQ4?= =?utf-8?B?dmpPYkZhRkpmVXBpaW9xc3FhWXZrL0hFVmllQVRoL3V5b2VPMnJ6WUxid3gx?= =?utf-8?B?VU1CVnBPRDVuUnlqalVacW1nblQzbDRHTm9QQkV5aGVhRjNPenQ5NmQrRG1Z?= =?utf-8?B?SWR5d0MxdlYrSXMweFcvYlJaTEdXY21rdk9UZXh1UnhkTTFyWlRZODduS1RD?= =?utf-8?B?Q0EvRVZKcERKWUxteDduTHlLSDBFSzErbVlOV2VDM1JKblQxZ0h0Q1RLWmRZ?= =?utf-8?B?NW5ZUEQwdG93MkZBTUpPb1pPcENORVV4bUEzbFphYlNma2RoWkZqUmJkbUFS?= =?utf-8?B?MG9yVTNXNWdjQ1RQUFY0NEs2bUE1QlluRGN4Z2ZWMmVpRWxYcGVDSG5PcHB6?= =?utf-8?B?S2hRaHB6alVVK0s5Q3NMcW1kUmxlaFNSU1ZGUm02R3FJSVJhTVliYlBmUzcy?= =?utf-8?B?NjBHR2w3djV5eHZnZnZFRVhrVllaQnN0ZUUwVVRBNW5rYmtzY1dtbStBa2o1?= =?utf-8?B?SldpM3ZLU280NnR6SWIwcEFDOWZ6akJSMDJmSXp5dUpCR1p0QUJVVFQ3WG1L?= =?utf-8?B?RVg4bFJLU3Nwb1F0YVBQNjZqZ3RMSjhKUWp5YWZLQnBJSG9XZzdXOUtBOUpW?= =?utf-8?B?YU90WU9lSU5RS2NlbjdVdGE4L1hLWTZDWkp3VXlSdEFlZHhDR1BrNVdIdVJB?= =?utf-8?Q?WjAS0Mq51mxa6jOpUM=3D?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MWHPR11MB1886.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: bf0c5a33-a244-470a-7880-08d929677383 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Jun 2021 03:50:54.2473 (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: 7Q7aT4vfo892hUtOJjtToD37HR+NMBxUhYc4pP9TkcwnEeZ6OqeDuNPjhe0NYm8AvYDS6aL7DqIBjZgf+qttPQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR11MB5140 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiBGcm9tOiBQYW9sbyBCb256aW5pIDxwYm9uemluaUByZWRoYXQuY29tPg0KPiBTZW50OiBTYXR1 cmRheSwgSnVuZSA1LCAyMDIxIDI6MjIgUE0NCj4gDQo+IE9uIDA0LzA2LzIxIDE5OjIyLCBKYXNv biBHdW50aG9ycGUgd3JvdGU6DQo+ID4gICA0KSBUaGUgS1ZNIGludGVyZmFjZSBpcyB0aGUgdmVy eSBzaW1wbGUgZW5hYmxlL2Rpc2FibGUgV0JJTlZELg0KPiA+ICAgICAgUG9zc2Vzc2luZyBhIEZE IHRoYXQgY2FuIGRvIElPTU1VX0VYRUNVVEVfV0JJTlZEIGlzIHJlcXVpcmVkDQo+ID4gICAgICB0 byBlbmFibGUgV0JJTlZEIGF0IEtWTS4NCj4gDQo+IFRoZSBLVk0gaW50ZXJmYWNlIGlzIHRoZSBz YW1lIGt2bS12ZmlvIGRldmljZSB0aGF0IGV4aXN0cyBhbHJlYWR5LiAgVGhlDQo+IHVzZXJzcGFj ZSBBUEkgZG9lcyBub3QgbmVlZCB0byBjaGFuZ2UgYXQgYWxsOiBhZGRpbmcgb25lIFZGSU8gZmls ZQ0KPiBkZXNjcmlwdG9yIHdpdGggV0JJTlZEIGVuYWJsZWQgdG8gdGhlIGt2bS12ZmlvIGRldmlj ZSBsZXRzIHRoZSBWTSB1c2UNCj4gV0JJTlZEIGZ1bmN0aW9uYWxpdHkgKHNlZSBrdm1fdmZpb191 cGRhdGVfY29oZXJlbmN5KS4NCj4gDQo+IEFsdGVybmF0aXZlbHkgeW91IGNhbiBhZGQgYSBLVk1f REVWX0lPQVNJRF97QURELERFTH0gcGFpciBvZiBpb2N0bHMuDQo+IEJ1dCBpdCBzZWVtcyB1c2Vs ZXNzIGNvbXBsaWNhdGlvbiBjb21wYXJlZCB0byBqdXN0IHVzaW5nIHdoYXQgd2UgaGF2ZQ0KPiBu b3csIGF0IGxlYXN0IHdoaWxlIFZNcyBvbmx5IHVzZSBJT0FTSURzIHZpYSBWRklPLg0KPiANCg0K QSBuZXcgSU9BU0lEIHZhcmlhdGlvbiBtYXkgbWFrZSBtb3JlIHNlbnNlIGluIGNhc2Ugbm9uLXZm aW8gc3Vic3lzdGVtcw0Kd2FudCB0byBoYW5kbGUgc2ltaWxhciBjb2hlcmVuY3kgcHJvYmxlbS4g UGVyIG90aGVyIGRpc2N1c3Npb25zIGxvb2tzIA0KaXQncyBzdGlsbCBhbiBvcGVuIHdoZXRoZXIg dkRQQSB3YW50cyBpdCBvciBub3QuIGFuZCB0aGVyZSBjb3VsZCBiZSBvdGhlcg0KcGFzc3Rocm91 Z2ggZnJhbWV3b3JrcyBpbiB0aGUgZnV0dXJlLiBIYXZpbmcgdGhlbSBhbGwgdXNlIHZmaW8tbmFt aW5nDQpzb3VuZHMgbm90IHZlcnkgY2xlYW4uIEFueXdheSB0aGUgY29oZXJlbmN5IGF0dHJpYnV0 ZSBtdXN0IGJlIGNvbmZpZ3VyZWQNCm9uIElPQVNJRCBpbiB0aGUgZW5kLCB0aGVuIGl0IGxvb2tz IHJlYXNvbmFibGUgZm9yIEtWTSB0byBsZWFybiB0aGUgaW5mbw0KZnJvbSBhbiB1bmlmaWVkIHBs YWNlLg0KDQpKdXN0IEZZSSB3ZSBhcmUgYWxzbyBwbGFubmluZyBuZXcgSU9BU0lELXNwZWNpZmlj IGlvY3RsIGluIEtWTSBmb3Igb3RoZXINCnVzYWdlcy4gRnV0dXJlIEludGVsIHBsYXRmb3JtcyBz dXBwb3J0IGEgbmV3IEVOUUNNRCBpbnN0cnVjdGlvbiBmb3INCnNjYWxhYmxlIHdvcmsgc3VibWlz c2lvbiB0byB0aGUgZGV2aWNlLiBUaGlzIGluc3RydWN0aW9uIGluY2x1ZGVzIGEgNjQtDQpieXRl cyBwYXlsb2FkIHBsdXMgYSBQQVNJRCByZXRyaWV2ZWQgZnJvbSBhIENQVSBNU1IgcmVnaXN0ZXIg KGNvdmVyZWQNCmJ5IHhzYXZlKS4gV2hlbiBzdXBwb3J0aW5nIHRoaXMgaW5zdHJ1Y3Rpb24gaW4g dGhlIGd1ZXN0LCB0aGUgdmFsdWUgaW4NCnRoZSBNU1IgaXMgYSBndWVzdCBQQVNJRCB3aGljaCBt dXN0IGJlIHRyYW5zbGF0ZWQgdG8gYSBob3N0IFBBU0lELiANCkEgbmV3IFZNQ1Mgc3RydWN0dXJl IChQQVNJRCB0cmFuc2xhdGlvbiB0YWJsZSkgaXMgaW50cm9kdWNlZCBmb3IgdGhpcw0KcHVycG9z ZS4gSW4gdGhpcyAvZGV2L2lvYXNpZCBwcm9wb3NhbCwgd2UgcHJvcG9zZSBWRklPX3tVTn1NQVBf DQpJT0FTSUQgZm9yIHVzZXIgdG8gdXBkYXRlIHRoZSBWTUNTIHN0cnVjdHVyZSBwcm9wZXJseS4g VGhlIHVzZXIgaXMNCmV4cGVjdGVkIHRvIHByb3ZpZGUge2lvYXNpZF9mZCwgaW9hc2lkLCB2UEFT SUR9IHRvIEtWTSB3aGljaCB0aGVuDQpjYWxscyBpb2FzaWQgaGVscGVyIGZ1bmN0aW9uIHRvIGZp Z3VyZSBvdXQgdGhlIGNvcnJlc3BvbmRpbmcgaFBBU0lEDQp0byB1cGRhdGUgdGhlIHNwZWNpZmll ZCBlbnRyeS4NCg0KVGhhbmtzDQpLZXZpbg0K 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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 82B20C47082 for ; Mon, 7 Jun 2021 03:51:09 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 345CE61209 for ; Mon, 7 Jun 2021 03:51:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 345CE61209 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id F361B8364F; Mon, 7 Jun 2021 03:51:08 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2rkJ22CUehDj; Mon, 7 Jun 2021 03:51:05 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTP id E4A3083005; Mon, 7 Jun 2021 03:51:04 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 98AE4C000D; Mon, 7 Jun 2021 03:51:04 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id C4FAFC0001 for ; Mon, 7 Jun 2021 03:51:02 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 9D7426075B for ; Mon, 7 Jun 2021 03:51:02 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp3.osuosl.org (amavisd-new); dkim=pass (1024-bit key) header.d=intel.onmicrosoft.com Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8Ftu0Mpo1-nS for ; Mon, 7 Jun 2021 03:51:00 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by smtp3.osuosl.org (Postfix) with ESMTPS id 84155605D2 for ; Mon, 7 Jun 2021 03:51:00 +0000 (UTC) IronPort-SDR: 2RxK3R4NcKCoMEcOSV03mwJsChRY4xubQYAz5NQ6Dxe9ylwJCkuMpY8sxy7O8CxqLNFZelnnFe kODld6TRwdCg== X-IronPort-AV: E=McAfee;i="6200,9189,10007"; a="204576911" X-IronPort-AV: E=Sophos;i="5.83,254,1616482800"; d="scan'208";a="204576911" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Jun 2021 20:50:59 -0700 IronPort-SDR: vihYOprQ0xPonVf/MqttbddJoucKykUrf+9zqaL7+K8B0tZG1HRFNN1KaxYfy7ggFdi/JgY+1g AEYA7bHWNT+A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,254,1616482800"; d="scan'208";a="468949988" Received: from orsmsx604.amr.corp.intel.com ([10.22.229.17]) by fmsmga004.fm.intel.com with ESMTP; 06 Jun 2021 20:50:58 -0700 Received: from orsmsx607.amr.corp.intel.com (10.22.229.20) by ORSMSX604.amr.corp.intel.com (10.22.229.17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2242.4; Sun, 6 Jun 2021 20:50:57 -0700 Received: from orsmsx601.amr.corp.intel.com (10.22.229.14) 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 15.1.2242.4; Sun, 6 Jun 2021 20:50:57 -0700 Received: from ORSEDG601.ED.cps.intel.com (10.7.248.6) by orsmsx601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2242.4 via Frontend Transport; Sun, 6 Jun 2021 20:50:57 -0700 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.174) by edgegateway.intel.com (134.134.137.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2242.4; Sun, 6 Jun 2021 20:50:56 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=FhSWIDznk61QT9FbU4HHVLOow/mB+PL53/SsxTJSYRWQTR5cEJfPwNvX0eiyDBN0G/LHWnFrVhFtlwpn4WgGUEcDZWZHRTRdOE+3o0KOmAACIIKmw2J2n5NdwjM4Wnrja5QxIHyONuorlaaDLU3ixwWNbl/hBigAOV144ISVfLvmBPSRk3+T/haq+dq+be0WzAH3TXA/Km7jM0txmMvF04fI//gujQGQE0lpI8o+qDoSAV4uVND1u0huIRccItRfcVkvzKyOmiE2GdMvm71HPeW2YeEfvebLkJPaJWnhKxDUCFUHDU1xCnsNxMAE7oKyNsWOHzBx3sTrEvTPIb5Ffg== 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=sWs6WICC/G6I9jJx7wmbUk4UcsQolsp3jHtYBFeeHYQ=; b=CxyJROGy6/bIfyu/p9/eEtj7GufW44rY1kPwWSTEWBOoCthDYAl9DoSCvVZ/tPa20jUgeqSP//vhvpP9x5Ep16YzVneF+SwB6LxOCCUkNTgsK9Z+nd0uWmpDkwgUnmI5XapvZ5Q5fEcJM2udO9vdj5j8KTMVQTcV8lflb4Ot/4bZ1WWldynCIVFizLnsxLanGF0EvShbWf3UyWeexPCIJptnFlJAAO3B4wipXsgOdnL/C25LFr9MC7pdxnZ+B+djaqRQFrhJJYjJ7n+XXkCwP8Vyneo2s4uw6/cC+jBTHDK9iCX8L+xWq4gtjvnZEYnYfaJ/h+qiaI1vAjwa7r0Kfw== 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=sWs6WICC/G6I9jJx7wmbUk4UcsQolsp3jHtYBFeeHYQ=; b=I2ePOrI9RAxR1O/x/kmQRMTC4gohkK45IpzejKHfZrbdYYCgtoT4SoQj1ZTzpNctxVPhboFDJP5sOsR7nAsgFEvqS9hK81EoIMp4oi4vmL8I5/q65ZnO6+cF6kBBqerVPmdpk/TzuT5ZqDCxup+Vby8odUfwaIfuFGoOqPtKsAU= Received: from MWHPR11MB1886.namprd11.prod.outlook.com (2603:10b6:300:110::9) by CO1PR11MB5140.namprd11.prod.outlook.com (2603:10b6:303:95::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.23; Mon, 7 Jun 2021 03:50:54 +0000 Received: from MWHPR11MB1886.namprd11.prod.outlook.com ([fe80::6597:eb05:c507:c6c1]) by MWHPR11MB1886.namprd11.prod.outlook.com ([fe80::6597:eb05:c507:c6c1%12]) with mapi id 15.20.4195.030; Mon, 7 Jun 2021 03:50:54 +0000 From: "Tian, Kevin" To: Paolo Bonzini , Jason Gunthorpe Subject: RE: [RFC] /dev/ioasid uAPI proposal Thread-Topic: [RFC] /dev/ioasid uAPI proposal Thread-Index: AddSzQ970oLnVHLeQca/ysPD8zMJZwBL2ymAAKTbxpAAKSt7gAAHpf9wAB1YcAAAAm5sgAAA1YgAAADonIAAAEmcgAABzCaAAAHbfwAAAYTsAAAEeLUAAAiRJwAAFF14gAAPozMAAABMSwAAA0bJgAAVeTBAAAlp0QAABjX0AAAAf0IAAABWuQAAAD8IgAAAOC4AAABA0oAAAn0sgAAbQLqAAF5vapA= Date: Mon, 7 Jun 2021 03:50:54 +0000 Message-ID: References: <20210603201018.GF1002214@nvidia.com> <20210603154407.6fe33880.alex.williamson@redhat.com> <20210604122830.GK1002214@nvidia.com> <20210604092620.16aaf5db.alex.williamson@redhat.com> <815fd392-0870-f410-cbac-859070df1b83@redhat.com> <20210604155016.GR1002214@nvidia.com> <30e5c597-b31c-56de-c75e-950c91947d8f@redhat.com> <20210604160336.GA414156@nvidia.com> <2c62b5c7-582a-c710-0436-4ac5e8fd8b39@redhat.com> <20210604172207.GT1002214@nvidia.com> <2d1ad075-bec6-bfb9-ce71-ed873795e973@redhat.com> In-Reply-To: <2d1ad075-bec6-bfb9-ce71-ed873795e973@redhat.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-version: 11.5.1.3 dlp-product: dlpe-windows dlp-reaction: no-action authentication-results: redhat.com; dkim=none (message not signed) header.d=none;redhat.com; dmarc=none action=none header.from=intel.com; x-originating-ip: [101.80.65.46] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: bf0c5a33-a244-470a-7880-08d929677383 x-ms-traffictypediagnostic: CO1PR11MB5140: x-ld-processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; 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:MWHPR11MB1886.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(396003)(376002)(366004)(39860400002)(346002)(136003)(7696005)(316002)(64756008)(66476007)(7416002)(26005)(186003)(66556008)(66446008)(86362001)(4326008)(52536014)(5660300002)(71200400001)(66946007)(110136005)(54906003)(6506007)(33656002)(53546011)(76116006)(478600001)(55016002)(9686003)(83380400001)(8936002)(8676002)(122000001)(2906002)(38100700002); DIR:OUT; SFP:1102; x-ms-exchange-antispam-messagedata: =?utf-8?B?bzhvRElSVHg3cHUxMEZjNlJ2dnh2NjNJOG1PWkwrOTZkV21Ld2hxYzd6Sm5H?= =?utf-8?B?WWpTcFQ4QUVEOXVzS21MUngzK3d1eWRpUVV4bzBLRUN6ZjBNWDBMOExsemZ4?= =?utf-8?B?OFVTS1pGbUIvQWcrTC9ES1ZLV1NOWGVmRmM2N1dKblhTQzNDRVhET1NtSHRq?= =?utf-8?B?ZHQvTS82Z1BiaFFXb0NXNEF5RlNGSS9Ub2czNGVLT243WnpPWjdHQkNRYWk0?= =?utf-8?B?ZUVLbldudkUwRFNGTGM4UmllRVd0ajgrNFpXQkJEV0d3TTZSSVRrY1BSTk4y?= =?utf-8?B?NW5vaXVFWHpOdkkvU0V5bFlDM2dUVDJ3dGNQU2d0bTdjT2hMNlZTN0xSWnJp?= =?utf-8?B?dU1Ma3JObUZnTkhmSEpMa0tKS1YyM0pZWkJmR3lDS2J0VEppMW1qSXYvU0JU?= =?utf-8?B?MEl0RXk1TVQzY2oweVI4UWlzS2dhYW1lZVIyUXhNOUZmN1J2Q2QxQjd3TVBP?= =?utf-8?B?aDVlazZFSmlzSDZyY0ljUWxLeXVUMThrbXUyZ0gyOTVqcVZxU1UxV3VqQUd5?= =?utf-8?B?WGhVMVhTVzhIV3pLWlkwNVJqd01teEtQZ2ZveHJWRTcvOGQ2QWJTVkVCK1hH?= =?utf-8?B?Qk1BV1RsdEtlVTlVdG1rZ2V0cnJwYXQybVBDTWJMQ1JFbWczSVRLVVhvVFh5?= =?utf-8?B?cUM1ZHU5dHE1TWd1TmFOWnZhRVlOaEhkOFZXcFBEQjhqUS9NcTlPa2ZQUnJO?= =?utf-8?B?bTh1MS84ZEVYbk1NWCtoMzliNXB4b09YU0crQ0YvVWZQZG54bXZCNG81aFdN?= =?utf-8?B?UFJZSnBNTUdRTkYzR0wxNDhmOG1KMEh1VWpHRWdVZERPQ1lWbUxLOUoxZWJ4?= =?utf-8?B?S2lDNm50d0JaZG9OcXhrTkVLWjVGMCtvajcxa0N0T0hiMjRxQWZHUS83Z0ly?= =?utf-8?B?a2xqM2xCMFFXdzlRME5tY3podzQ4aG14YkxhTGttZW9LSXd3Tjg5RCtPemFs?= =?utf-8?B?VWc2dEJBN2JRRFpvTmJSWllFRStsUHk2aGxKTFlnL3h5bFU5MDlpQVF6MlVj?= =?utf-8?B?SDdpcmp6dGtmWXRiMTdQVWI1UWVTclloM2pZT0VVZ1BEUjRQN0tUTU9kaGQ4?= =?utf-8?B?dmpPYkZhRkpmVXBpaW9xc3FhWXZrL0hFVmllQVRoL3V5b2VPMnJ6WUxid3gx?= =?utf-8?B?VU1CVnBPRDVuUnlqalVacW1nblQzbDRHTm9QQkV5aGVhRjNPenQ5NmQrRG1Z?= =?utf-8?B?SWR5d0MxdlYrSXMweFcvYlJaTEdXY21rdk9UZXh1UnhkTTFyWlRZODduS1RD?= =?utf-8?B?Q0EvRVZKcERKWUxteDduTHlLSDBFSzErbVlOV2VDM1JKblQxZ0h0Q1RLWmRZ?= =?utf-8?B?NW5ZUEQwdG93MkZBTUpPb1pPcENORVV4bUEzbFphYlNma2RoWkZqUmJkbUFS?= =?utf-8?B?MG9yVTNXNWdjQ1RQUFY0NEs2bUE1QlluRGN4Z2ZWMmVpRWxYcGVDSG5PcHB6?= =?utf-8?B?S2hRaHB6alVVK0s5Q3NMcW1kUmxlaFNSU1ZGUm02R3FJSVJhTVliYlBmUzcy?= =?utf-8?B?NjBHR2w3djV5eHZnZnZFRVhrVllaQnN0ZUUwVVRBNW5rYmtzY1dtbStBa2o1?= =?utf-8?B?SldpM3ZLU280NnR6SWIwcEFDOWZ6akJSMDJmSXp5dUpCR1p0QUJVVFQ3WG1L?= =?utf-8?B?RVg4bFJLU3Nwb1F0YVBQNjZqZ3RMSjhKUWp5YWZLQnBJSG9XZzdXOUtBOUpW?= =?utf-8?B?YU90WU9lSU5RS2NlbjdVdGE4L1hLWTZDWkp3VXlSdEFlZHhDR1BrNVdIdVJB?= =?utf-8?Q?WjAS0Mq51mxa6jOpUM=3D?= MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MWHPR11MB1886.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: bf0c5a33-a244-470a-7880-08d929677383 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Jun 2021 03:50:54.2473 (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: 7Q7aT4vfo892hUtOJjtToD37HR+NMBxUhYc4pP9TkcwnEeZ6OqeDuNPjhe0NYm8AvYDS6aL7DqIBjZgf+qttPQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR11MB5140 X-OriginatorOrg: intel.com Cc: Jean-Philippe Brucker , "Jiang, Dave" , "Raj, Ashok" , "kvm@vger.kernel.org" , Jonathan Corbet , David Woodhouse , Jason Wang , LKML , "iommu@lists.linux-foundation.org" , Alex Williamson , Kirti Wankhede , Robin Murphy , David Gibson X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" > From: Paolo Bonzini > Sent: Saturday, June 5, 2021 2:22 PM > > On 04/06/21 19:22, Jason Gunthorpe wrote: > > 4) The KVM interface is the very simple enable/disable WBINVD. > > Possessing a FD that can do IOMMU_EXECUTE_WBINVD is required > > to enable WBINVD at KVM. > > The KVM interface is the same kvm-vfio device that exists already. The > userspace API does not need to change at all: adding one VFIO file > descriptor with WBINVD enabled to the kvm-vfio device lets the VM use > WBINVD functionality (see kvm_vfio_update_coherency). > > Alternatively you can add a KVM_DEV_IOASID_{ADD,DEL} pair of ioctls. > But it seems useless complication compared to just using what we have > now, at least while VMs only use IOASIDs via VFIO. > A new IOASID variation may make more sense in case non-vfio subsystems want to handle similar coherency problem. Per other discussions looks it's still an open whether vDPA wants it or not. and there could be other passthrough frameworks in the future. Having them all use vfio-naming sounds not very clean. Anyway the coherency attribute must be configured on IOASID in the end, then it looks reasonable for KVM to learn the info from an unified place. Just FYI we are also planning new IOASID-specific ioctl in KVM for other usages. Future Intel platforms support a new ENQCMD instruction for scalable work submission to the device. This instruction includes a 64- bytes payload plus a PASID retrieved from a CPU MSR register (covered by xsave). When supporting this instruction in the guest, the value in the MSR is a guest PASID which must be translated to a host PASID. A new VMCS structure (PASID translation table) is introduced for this purpose. In this /dev/ioasid proposal, we propose VFIO_{UN}MAP_ IOASID for user to update the VMCS structure properly. The user is expected to provide {ioasid_fd, ioasid, vPASID} to KVM which then calls ioasid helper function to figure out the corresponding hPASID to update the specified entry. Thanks Kevin _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu