Received: by 2002:a05:7412:d1aa:b0:fc:a2b0:25d7 with SMTP id ba42csp827058rdb; Mon, 29 Jan 2024 22:25:03 -0800 (PST) X-Google-Smtp-Source: AGHT+IHjUKlLqX9Q1TuB2sdnN/qttpkHxqPQqokzSFe1jkT/JiUfJLeMoWaFTZjtRV1fQTrXUHI8 X-Received: by 2002:a05:6830:20ca:b0:6e1:1014:1504 with SMTP id z10-20020a05683020ca00b006e110141504mr8419720otq.74.1706595903681; Mon, 29 Jan 2024 22:25:03 -0800 (PST) Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id bw20-20020a056a02049400b005ce02ada455si587644pgb.656.2024.01.29.22.25.03 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jan 2024 22:25:03 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-43991-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=CMybAZXm; arc=fail (signature failed); spf=pass (google.com: domain of linux-kernel+bounces-43991-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-43991-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 4E2AB283C2E for ; Tue, 30 Jan 2024 06:25:03 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 67AE838393; Tue, 30 Jan 2024 06:24:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="CMybAZXm" Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 328074C60E for ; Tue, 30 Jan 2024 06:24:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=198.175.65.9 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706595882; cv=fail; b=M7oRDUPTJAp883m7YFsZU0Pk5/Y/SD91XSnQFDOjPKl/HsJLL2Seo5FI5UFAo5ulQMEJqygSS2i7M65DdqbUKUJqGfMo5v34RV/T/QLPe9jdtyb69zVRVT2SYi8YkqP+/rIoSMn+eO3sBZcnXJRF+dExQW3FiAYB1zX6ipZSXE8= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706595882; c=relaxed/simple; bh=77+WxyNRQo4ThrqmQAtkcc2bVrM4t5d94f2jM1u57mE=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=YTG8mw3JsFx9fZW6EH74N0ZVDmTS7qk5ngR0SOnMQbsDyu1bDDiVxlh4Jv0INyGPX0EUL0+mjvvB5gIFrstkwQZ8Kp9Vl2Guhe118rWJg+CoV5e/C139RcLKOtkjAyRo1IzV0Xzyrdu4dZH9RbEWtYo6wq0C1JorvOoWTNBM/Vo= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=CMybAZXm; arc=fail smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706595879; x=1738131879; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=77+WxyNRQo4ThrqmQAtkcc2bVrM4t5d94f2jM1u57mE=; b=CMybAZXmiDaKMCeB5iko1/1K6lLojbRn6vJ6/6Yw5vltBqD7dJkDbrpw PW/vVkmixGrEKKj0/XAolhl2bXRqThGgt/jcvEf2JoukiviZEC/4QUYgp 8Pw941S4sDUE1YWQyVdcEOmMGfLMpnDpKQzliv332xbtby/Sajltf4SoT 9MjzTwMmBaZ6BPpceS+A1uBFCjqAXGafrB4JFhWsFb0cGRiX5PFSTIiQm PZosk9ztRw7O6Eti1l9RbdMvtQsfU6yIdd8Ie7XCYcAOLB6Y7fek3J9Tz ZywShyNlKdEswNWCzQFgk6rig+FhWE/hGVIYCqAgpC79ulEdUJhimJ8Rm A==; X-IronPort-AV: E=McAfee;i="6600,9927,10968"; a="21701657" X-IronPort-AV: E=Sophos;i="6.05,707,1701158400"; d="scan'208";a="21701657" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jan 2024 22:24:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10968"; a="961153941" X-IronPort-AV: E=Sophos;i="6.05,707,1701158400"; d="scan'208";a="961153941" Received: from fmsmsx603.amr.corp.intel.com ([10.18.126.83]) by orsmga005.jf.intel.com with ESMTP/TLS/AES256-GCM-SHA384; 29 Jan 2024 22:24:36 -0800 Received: from fmsmsx610.amr.corp.intel.com (10.18.126.90) by fmsmsx603.amr.corp.intel.com (10.18.126.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Mon, 29 Jan 2024 22:24:35 -0800 Received: from fmsmsx612.amr.corp.intel.com (10.18.126.92) by fmsmsx610.amr.corp.intel.com (10.18.126.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Mon, 29 Jan 2024 22:24:35 -0800 Received: from fmsedg602.ED.cps.intel.com (10.1.192.136) by fmsmsx612.amr.corp.intel.com (10.18.126.92) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35 via Frontend Transport; Mon, 29 Jan 2024 22:24:35 -0800 Received: from NAM02-DM3-obe.outbound.protection.outlook.com (104.47.56.41) by edgegateway.intel.com (192.55.55.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Mon, 29 Jan 2024 22:24:34 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=bD4SHdzYIuGZ6PDUwdg71sP5x9q2jaEjjyIIbcktG9j7fg1qoIF/AZMkIr0/yR89jyv3uN1c6MivgZmYmF4MP1VvBvOr85voupt/XqBNAiZfIP9jhr+hnfrVOaRgZysyde6bXnX5lvcZKIpTNk/9ePFMOokfqiZ5da7AvRw/4FGNdajxYeoP59EZbUmFJDlptAW6479KWAi8XCkk8A19g3LiBI2YO0rA695JkLZagLsRSyCxN4jjVCEEB2uu82DRRyjNNuNlznBhHAlgX47kz7aoVTLDnNeL01OHoW9wss5p/iaCn4A+dEhJj/c/2mVidEZv+6Q7aYYqayi3CCEFvw== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=77+WxyNRQo4ThrqmQAtkcc2bVrM4t5d94f2jM1u57mE=; b=nYiLwYfpUuW6QqzWYWVozZ2GaO6aYPzcgqxffG5xyb6X8tdY79oLjwFXf5h5qbmf+6VVhsk2JcZFdNEEiRpgOQbscCm0y9djBHSxxsNyDzCkx8L4Unlb+gXrn0xO2RljiNpd8J3y8Ch1MyBrTa3QgmafR14aTxMTmBNva1BoXonJ2Cl1B/Xvvhb5i3EhpDIodk5slcJTTs0u88DFALTFpO32iE1nEqZXHzj7+iX7pYn11zb4riUTAMAh395Ca0viPSPq64krlpSeyfI8c8NU4se4zWwkHRMHIfo5Rhy3c6dqKLFwTtPAYHSoW/13jJl9KctpdntZSkI/JDIrf8Tokw== 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 Received: from BN9PR11MB5276.namprd11.prod.outlook.com (2603:10b6:408:135::18) by BL1PR11MB5269.namprd11.prod.outlook.com (2603:10b6:208:310::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7228.34; Tue, 30 Jan 2024 06:24:33 +0000 Received: from BN9PR11MB5276.namprd11.prod.outlook.com ([fe80::a8e9:c80f:9484:f7cb]) by BN9PR11MB5276.namprd11.prod.outlook.com ([fe80::a8e9:c80f:9484:f7cb%3]) with mapi id 15.20.7228.029; Tue, 30 Jan 2024 06:24:33 +0000 From: "Tian, Kevin" To: Lu Baolu , Joerg Roedel , "Will Deacon" , Robin Murphy , "Jason Gunthorpe" CC: Jani Nikula , Joonas Lahtinen , "Vivi, Rodrigo" , Tvrtko Ursulin , "iommu@lists.linux.dev" , "intel-gfx@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH v2 1/1] iommu/vt-d: Remove INTEL_IOMMU_BROKEN_GFX_WA Thread-Topic: [PATCH v2 1/1] iommu/vt-d: Remove INTEL_IOMMU_BROKEN_GFX_WA Thread-Index: AQHaU0OIVYF9w8s9LkaxJ4DVx0n2bbDx40vw Date: Tue, 30 Jan 2024 06:24:32 +0000 Message-ID: References: <20240130060823.57990-1-baolu.lu@linux.intel.com> In-Reply-To: <20240130060823.57990-1-baolu.lu@linux.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: BN9PR11MB5276:EE_|BL1PR11MB5269:EE_ x-ms-office365-filtering-correlation-id: eb2f078f-818b-4642-b054-08dc215c1f8b x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 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:BN9PR11MB5276.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(39860400002)(396003)(346002)(376002)(366004)(136003)(230922051799003)(186009)(64100799003)(1800799012)(451199024)(9686003)(26005)(83380400001)(55016003)(316002)(66476007)(66556008)(110136005)(54906003)(64756008)(66446008)(478600001)(66946007)(76116006)(7696005)(6506007)(71200400001)(4326008)(8936002)(8676002)(52536014)(5660300002)(86362001)(122000001)(38100700002)(82960400001)(7416002)(4744005)(2906002)(41300700001)(38070700009)(33656002);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?g/7PHOkZ7zGVU0OYEYJFpC72bg2f7Ohs3KKErgb1NHPC9nh6K8bAgIgIsSVK?= =?us-ascii?Q?DDzndIcHV/ezvDq5FXaKzjH/qMyF+SWPZC5mWkO/zS+eU0Bs1oM1XPCDnWr8?= =?us-ascii?Q?ABy6zu9UIjhTKh7BQkE5f14hHB/uiiASBbjONYVUsDGf9Uo37RG7qyJMuyrl?= =?us-ascii?Q?3D6nk5+6KiEf0pmZR3TjPiMayTD1MT3h9aisEmljIE8Q/aGXunIqiGBWLnYw?= =?us-ascii?Q?ZpjsTHxxOnz+2+uSV06UVo7YUmCyXRwLc2I2g4arSvXTiKRb2npwDYNOgFtA?= =?us-ascii?Q?V4qA1QzV6K5Ve7QONRZIS4LEMx+5d2+4+BUOMcZLVoJC4q6NXCaJ4HH32qa8?= =?us-ascii?Q?ktqg/zE/h51KXtgmfFK1BtdSs+XhMFWwQEQOAKTQxJwucbZ84uXcQWtDWXQ7?= =?us-ascii?Q?uHAcXjVkLPdWDuj5OgGQ2N5BSs7TzYbyAOzU9GguVdcbqfFy+ZRsZcfqjfQK?= =?us-ascii?Q?yXQJaIoKDbE+j32Bnmp3FfiU4h/lsyWimUpXvwlmy2P9UPYUwR/5pqwk19hf?= =?us-ascii?Q?PUOhCMjmNyC/4Qdflo3tS3ACn1YTVnjj6MJILvpneutyEgqL5Vqm76XF+JrG?= =?us-ascii?Q?FQANruiNrr8FDV64g45+30dVPv1B2fCZOqvayrP0qlqIk72bCit1edp1psVk?= =?us-ascii?Q?ToTiZcGvSfwDxadmP2x6gD7KljKgh7phpyfCxu0dfAHeoCxS+LsodEROvHMP?= =?us-ascii?Q?aWcQtQ7Cn8QC7RP+gRNgekDs9Fwx2Jk2WFlFaosxLVN7hEUOlm26pL9YdMWF?= =?us-ascii?Q?E47QyNAFzLSQ38UVWHqDcrgpjCB6LKqVLwVbN8RNORJaZI0TdRXk4GyRIWAi?= =?us-ascii?Q?eQjyqJ/6vsg6KRBGR3RCnLHFNRJ9tj+LR5xga2UlJ8y8P9nM2h/q3ZZD/f4t?= =?us-ascii?Q?0Awmb9KL/bqj4sy5VqXSsa6kONDlXA3uPEbxOCw4yQGc8g7V+YmQtsELgWxO?= =?us-ascii?Q?WPAX2PabnqmqFngeHEA63VE+nt/8ZBf+89a38qiIionmjuX0pRR49VptbBBF?= =?us-ascii?Q?w/pCyugVS0J2a7crUcLJYqvhoAQpxEjcFO4M/TNDC9h3fvllFL2YTj4UtWka?= =?us-ascii?Q?UjRClzieKGUZQmeEgoJspjoqewRXILolKpGH4HliNCVsV+E5PF1ahzijJi9Q?= =?us-ascii?Q?esHOZhX0qxn6xRPzPj44HxStP2GcjDJvCDf5Thi10XCt/CDEFICKZeB4X55n?= =?us-ascii?Q?ZWyNfvFcqiuyV/aJkUWnf82U6i8auueOXV5uNS0yM8iuNKCBBzRGXpEcNbD0?= =?us-ascii?Q?czFja/vOz0OwMqAak2GjqF8scSZ+W87x7cvY9rGu71FkyxOIA3mw6S2RQaMS?= =?us-ascii?Q?DO8GFmvtfpXPf2V2LWTypj6f2I0Inovvu1uu50tYNtsuVrP86ab36buUDZ3x?= =?us-ascii?Q?9yrFVQLJBjz7m/+zS3LO4411QqkU9lrlw+IFjGrA2+mAQElRHPGLScde0T+a?= =?us-ascii?Q?zKzJaFcSgsl2JwqttAv7Mtdg2YbtSCXczaLhHq+acg3nL9X2VrTq0Ti7j33k?= =?us-ascii?Q?GJBddTq5Ka8tHYFsyDQx7IQ+Pb2/8CU/k01ErfhvXxWsT6+J6fKnrjVqyZn+?= =?us-ascii?Q?385k8wnGtk6mUTVLD6pu/ZqE6/uRNudtAf3YiRk3?= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BN9PR11MB5276.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: eb2f078f-818b-4642-b054-08dc215c1f8b X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Jan 2024 06:24:32.9505 (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: TKznmAupkuUwmbf9IBKtVB/oDYjhp0vhpm3kAqxwQEnbjRt+qaaOXk+eBT6BOecDjd4/7cJnIxrYtKa6fclXiw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR11MB5269 X-OriginatorOrg: intel.com > From: Lu Baolu > Sent: Tuesday, January 30, 2024 2:08 PM >=20 > Commit 62edf5dc4a524 ("intel-iommu: Restore DMAR_BROKEN_GFX_WA > option for > broken graphics drivers") was introduced 24 years ago as a temporary > workaround for graphics drivers that used physical addresses for DMA and > avoided DMA APIs. This workaround was disabled by default. >=20 > As 24 years have passed, it is expected that graphics driver developers > have migrated their drivers to use kernel DMA APIs. Therefore, this > workaround is no longer required and could been removed. >=20 > The Intel iommu driver also provides a "igfx_off" option to turn off > the DAM translation for the graphic dedicated IOMMU. Hence, there is > really no good reason to keep this config option. >=20 s/DAM/DMA/