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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3B8B1CA5FD4 for ; Fri, 2 Oct 2026 03:45:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3851010E03A; Fri, 2 Oct 2026 03:45:23 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=amd.com header.i=@amd.com header.b="XgXWPtQb"; dkim-atps=neutral Received: from BYAPR05CU005.outbound.protection.outlook.com (mail-westusazon11010058.outbound.protection.outlook.com [52.101.85.58]) by gabe.freedesktop.org (Postfix) with ESMTPS id 036AF10E03A for ; Fri, 2 Oct 2026 03:45:22 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=xKmxBZbM3K125gGivTyUQq8oZXSE0S1+5cklnYUyrVl/V9UAD5A5hlTEc38osVfI9Xq58dB8nojOAEmDbU77kcaehmyY+r4DQKMo+QAQ6rkwB6JXHr/D8JDv4EGj3U/VZADB0vhN8pqFLiH4aP67LPCTBOCbdONQthOmJuTLwgRlbHgl+4OCq4+3jlxaWsjPt/IzwflUH2TfqTjQImvm6ejcqZJkEp49PXvlvWIAGVPE3UOwvEfstGU26ZeHv1WB2KCjI+37pBoiaaTLwnq6gqlf0tBvcd/BWXqhq3TGkM+jhDyGosjNf4YwxHEwOsQZ1mbjY0/tEbC8NZ5qDeP9UA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=gOw0UB9iFDf8BCSyQ/SVNJD/5hN2YPyarozK4u8dqUc=; b=UiL3ceb8PPzuxwUoAQH5Guj6htVsbf0+2pZ/yaE6oMrghkEXWP3kvL6X8CQcWvVubDVayba3wwfJoYWf6q1XIhgH92gioO45aH2Svu7ZRC3xW61gRKm5yy56l78plQqzpxwbWGjjxchhVrPGAeYMW8YIGSyMgUChHSZOdwuDnHJ9ePpuVJuRK4c62wIOAmk9K+mJMiO6nhnqUXZqwlPGDsDFqJb5jE+vL5CXJ3X5WCa2z01fhPmde+Fsoip4fZn6D2XsXcrzcRKkTi/Zd2qyY35WpQ8haKvJYjUBAU7ktCYseDvtpC/+Snoc9aXJjwFw4Y/vqlVk5lIOZn0KZ2pBow== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=gOw0UB9iFDf8BCSyQ/SVNJD/5hN2YPyarozK4u8dqUc=; b=XgXWPtQbhL+jQXbbD5EDtB7Dxx1eCEdwNCUxL47QatWHibRFpXzrVA2FgBkicwuDU1WX1hqvjh9zM6s2OsD0BzuM3r/IOdCilMEwUBHvz/ftj5w9dOuKWhOtCAQ+w1wWJBPXbpuyrzo3nDgcbiWrq7bdyooZV7GnNWiBGmVOwH4= Authentication-Results: mx.microsoft.com 1; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from BL4PR12MB9505.namprd12.prod.outlook.com (2603:10b6:208:591::16) by PH8PR12MB6820.namprd12.prod.outlook.com (2603:10b6:510:1cb::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.472.16; Fri, 2 Oct 2026 03:45:13 +0000 Received: from BL4PR12MB9505.namprd12.prod.outlook.com ([fe80::73aa:eb8c:a86b:5a83]) by BL4PR12MB9505.namprd12.prod.outlook.com ([fe80::73aa:eb8c:a86b:5a83%5]) with mapi id 15.21.0451.022; Fri, 2 Oct 2026 03:45:08 +0000 Message-ID: Date: Fri, 2 Oct 2026 09:14:59 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4] iommu/amd: Make PerfOpt compulsory To: "Mario Limonciello (AMD)" , Jason Gunthorpe Cc: Alex Deucher , Joerg Roedel , Suravee Suthikulpanit , "open list:RADEON and AMDGPU DRM DRIVERS" , open list , "open list:AMD IOMMU (AMD-VI)" References: <20261001182410.1525285-1-superm1@kernel.org> Content-Language: en-US From: Vasant Hegde In-Reply-To: <20261001182410.1525285-1-superm1@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: PN2PR01CA0224.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c01:ea::19) To BL4PR12MB9505.namprd12.prod.outlook.com (2603:10b6:208:591::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL4PR12MB9505:EE_|PH8PR12MB6820:EE_ X-MS-Office365-Filtering-Correlation-Id: bf29b6a1-e70b-4f0a-ea52-08df20378d6e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|23010399003|376014|1800799024|366016|11063799006|56012099006|10067099003|18002099003|22082099003; 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:BL4PR12MB9505.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230040)(23010399003)(376014)(1800799024)(366016)(11063799006)(56012099006)(10067099003)(18002099003)(22082099003); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?bGpDNUVRSVpkVi91NGpsQ0FGWDNLOUplMWVBTEE0aDVLT2NRN1JwN084YkVG?= =?utf-8?B?L0paYWhPamJNZ1hvMzdSRS8wQy9jS1Z3eXZIUklUL001RDVxd05wUXR3M2RB?= =?utf-8?B?MnBCVG4wOEZDOWx5Q0MzdTNVSWlQdko3UU1sam9qOC85WTBwQllKUWttdmVD?= =?utf-8?B?dENqbTVCUk5ocytZYlk3L3hzdGhySzBYbUNYNGk5OXcwR0VJK2R2ZXFLdWhD?= =?utf-8?B?WkxlVlhtM25rSTIwenhTZDBKT3p6SXhicC9zNlpvSHNjeTJXd1QrQWZMeVZv?= =?utf-8?B?NXhVdHI4R3dEOFJ4bk5SVzRTR3JlWjVYVkhsc1JpN0xDcGtBVFFsd2lEMFhB?= =?utf-8?B?ZXBnKzc4YzQ5M0E3STMrTWZLWGsrc3ZkQ1lldHVCN2dUS3FqRTZqN1poTnZP?= =?utf-8?B?YTArNEZleFZGbUpiZzRHL0N6SVNSUkIxZ2tFRDhWU3BHVFZEZWJXSUw5UEFF?= =?utf-8?B?MXpmZFU1cUxnZmlDZGZqU3Z6V29tYkJIUWs1bDlidXh5cXp4YVMrZzFZYTUw?= =?utf-8?B?TktrTEVaWlJPZU1lc0VLQjJNZG9xTDlGUzBQT2xwaWkwVEdaWnE0YmdPZytx?= =?utf-8?B?SzBselRLTHRxZUIxMVY0VWpWa21EdmF2MGVXOW0rMkhHS2lFWUl4TmZ1VUJX?= =?utf-8?B?TWMvMmVIV2luOCtuUnI1ZS9pY3lER21kY1o1TDIvZDJURTlqME05MXVkWCtF?= =?utf-8?B?L1VVT1lHa1RNUklnSG9pMGdobTQvNEgwMHBIN3dlZnZsOHprekN2N3ZISFR4?= =?utf-8?B?ekRwYkhqOFJWWVVta3J0YVQ1NkhhVk84ZEZ3TkxpWEQxNEJ6SUE5Vjc4WjVz?= =?utf-8?B?bEJRbDM0akZVQVpWbHR4QzRBY2tJUks0ZlJsTHRTd1JvbnpGd0V3N1MzbmtS?= =?utf-8?B?T0FsK3lnNjBCQWVQYndnSGpaeWwwVkNJSm15amRwU1o2U1JlZGVzODNYa3FL?= =?utf-8?B?cHplUTF6NUhxSUJ5eG0yYnYwOWZaam1tU1U0eis5b3Jtb1ZDeWY4RWMyVG1D?= =?utf-8?B?aTFtamNkTSt2clVRTGVScEEwa1BBa0EweXB1cFlsa24yQm5zZDErdGFjWU9n?= =?utf-8?B?NkdtanlqT29id1AyRjI5b1pENE5CWTFkOUQ3SXpoNUp3OGZqMk5VZWxxY3Uv?= =?utf-8?B?RE5hVk5DMzM1ZkZRME45RlJTSG55UHNLc0NQcXBONzIwckFIZ2prdWc3Rjdw?= =?utf-8?B?bU1menJ3czFvbmlPSEgrQlZFOEd3b3ZMcnF2dEV4c3NKa2RwMVU2YnNJeXFp?= =?utf-8?B?ejM0YWRIK2NRMEZjZUNhYnQzVk5sUmNUL0lJaXFXZ0NVS25yTUtQYU5Ta082?= =?utf-8?B?dStXK0hRV2JiekVOQjV1K2V2aUFNSkpFVnhjN0hGdzZWY0hCSlBiL2E3Qlpk?= =?utf-8?B?NmsvQjBzeE5rbmpwS2w1dERqTHo1SXRyTWVTT2dMdEQ4V3FKVlhaT3A1ZXVa?= =?utf-8?B?K0lzRWRPWDFIV1Rid1dyWjFLWkhZMDJDN21YVWRSZHVydVF2US9pVndrcko1?= =?utf-8?B?cnlaOWVWZzBXTFdoWjBpbEFEZFdid0dIc0YxM2JhN1hDanFOUFR1VEJGSHor?= =?utf-8?B?cXY5NW5ueVk5a29Pb3hMaVROWFMvVkhwZktnM1RjU1Y1dTg1ODRsS2RLVlZB?= =?utf-8?B?bUUvcTNNbXVGYkt5d3FRT3JzTndoakN5dmlLeU9yMzhTeTBPaEEwcWVIdnZ3?= =?utf-8?B?T2pTOUo1YytBWnFUUGVObG4zQ3BJenVsZzVPaXNBU1RHNEVNUWlxRnNSNENu?= =?utf-8?B?M0kwQjUwNm5ROU9IWFNEMGhEamZ4Q3N0L0RxbkVaNFR0dUpnZk93MkI4YldF?= =?utf-8?B?OWxOanFuK2pLRGFyNnhUTXoxYjNCVlBCSFdRVHVkTU1GRG8zakY3NmdBYzdE?= =?utf-8?B?SjcwTjFseTlQOXpHOGZhVnF4LzRzMEkzYTVrOXVxMVg2b3ZsNGlRWlVzSDMv?= =?utf-8?B?VlRsUmpOZFJTUTQzSzBwUVRXSGh3ZUczNlM2bXdISUFSVDFhckRhR0dDTVND?= =?utf-8?B?ZDI4MTBITU5hWVJaVWpMMXVLZ3hQTE85UUZTaldsb1pHa1hJa0JDQzB3bWpn?= =?utf-8?B?UHBBaEJ4T0E2NFNwNUpQWjR4MFArRWMyNVJSV0Y4SWtEOWZmREMwMEtnNmlz?= =?utf-8?B?eVM5bFk4OFNGVU9EM3VNc3I4bGRHOWMwSXRqZ1IydnN3YWIzVlVUaGhsdU9O?= =?utf-8?B?QXdZbkQ4TnZubjNUalJiTHZ5TWRZVzlIcFFYYk5TY2psbEJneXR0eUd3Q3dw?= =?utf-8?B?bDMzc21DQ0VaakhkZ2tyaDZmTjJDL3lxTGcvcW0vcDE3bFZabnRobTJ3VmV4?= =?utf-8?Q?jF086t2XBPU0JTnMYz?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: bf29b6a1-e70b-4f0a-ea52-08df20378d6e X-MS-Exchange-CrossTenant-AuthSource: BL4PR12MB9505.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Oct 2026 03:45:08.1462 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: NpdhPHZIgXeKJVeYKtTBt1qCZx26uG1wvM9b5c2dvNySmSkPYxO6Ql9coWvWDWzLkWbuQw0/4jnt7jUS+bjvRQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6820 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" On 10/1/2026 11:54 PM, Mario Limonciello (AMD) wrote: > PerfOpt is only a feature usable by integrated GPUs and only in identity > mode. Instead of leaving a policy knob in amdgpu, just turn it on when > an integrated GPU is in identity. > > PerfOpt locks the GPU into identity mode where the DTE is ignored, so mark > it require_direct (blocks VFIO/iommufd claims) and disable PASID (no GCR3 > table in the fast path). > > This drops quite a bit of compatibility glue. There was a refcounting > system, exported symbols, and device attach/detach logic. By just setting > it immediately it's a lot more straightforward. > > Suggested-by: Jason Gunthorpe > Signed-off-by: Mario Limonciello (AMD) > --- > v4: > * Disable PASID for PerfOpt devices > * Don't allow attaching a blocked domain This will block attaching device to guest via vfio-pci. Is that fine? -Vasant