From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2042.outbound.protection.outlook.com [40.107.223.42]) (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 B40FB1DF27F; Thu, 17 Oct 2024 16:40:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.223.42 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729183225; cv=fail; b=AbEG/a9OgVbnFrRqsMKbAw1k4zw0YxACI0dLBlsvQVkmJQBxXTa4x8HcRR/pWeWFYXEsx51VzvJQKazrqRQ3SGDGKaHXMu0xn8hfKPORFcS2bxGBsbS2ALvSFhReT1LX2UjY/j+kD2lbRYXXbrY46AwE1+6kMjbMRYj4rWiT76w= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729183225; c=relaxed/simple; bh=65TLD8ilOkO2fKmdQEG5mIiYo9Kr5Bkc7FLibVZoxA8=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=ITWFxX/WZCsT90PHlSjdTgWLxp5/NtWxy8pU8n1ONs4OA3IhmFyIr2aFnBzjsrOi/69QyZh29pXk2YjJzA6mMX5fZuYGP94rJdcproW8B5dKqoCsCKrDKbMZ/7DDZ38EIx2NjPP7H71r5F411pe/4LivGsmzmYC7/aYuXjKvQx4= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=qpdtMZEq; arc=fail smtp.client-ip=40.107.223.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="qpdtMZEq" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=DIYfJm4IdGzDxs77tI/BwlBgUZJuqiEmYZ/S1kvdnnm77pSlcdYOCUhBI7+Ao2y5FeTIl915M96IvDbC/NQV+ms7mXemSNcyGUHdsEXv8UGPzF1962h0C8lMri5Ly8N9o2Xdwh+E48ZPDfV6y3foK0JYuAjuD1j4VJjjW1zM1TXDI6JLAChcKK2aSHSN50Bwhuy2RJF2S4GAbDONxGGG6tviT/k/LbACrK3xflSp9DEak4iqwYDooVaRCi08++t+s4m++bd4w8e7t4zT7RN0ID/r2VTRcM4DVnHTLnvNYTe0RLzU+0wCTbPNb/buevh3nrzar67l/jzNo4b7B3l00w== 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=CR8FJAMTI2VOheO8YAtlFu0dyYAxGn7/gWE/DVnrCes=; b=bj1+8AtZZlaNJqc7MrvyDlNgB3edM8EtSWvA5SY15RTiIap2D8+MjO+6rBBRWRJJ/8Vdoe3a1K61MlJR0aAPkaOGDHY3Oa07fZC4kLsLmyxqzSNQCx7eaLHf0LIosh6Xj8fk1slke042LYXSJnGtqFgmAwunFtI/P5xXih15PLdcI1ALUAkPL70z6qNAQL81G8Na79/VbLymyRDPO7RJs9wDvguEg7Fx5lqz2OHz7k8vh6iNqWyZnG7SfeidlDmjotd2yZQ5jkORxrVQv7IBAzmNwISg0X91LUSNCwMHgejZPMdXJygJq8bgMsennM61nhbZgg8vNzSflECOB/aYPw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=CR8FJAMTI2VOheO8YAtlFu0dyYAxGn7/gWE/DVnrCes=; b=qpdtMZEq8ZBi18yQQyvL0pbrRHCFG8pMJjGiK3rH8vIhPGU5CC5AGZIFldyQfTJ+GtUJdL88YP4EK2giigA7Yh17o99GF/+pqZacHuFpEvYnk65A6tGiywddIJsDnDGlRShPk0j5jGyvt3axuGLowWyP9HcdDByxg7pIZDrlGmhq3L6pjDDQGsQc8EHL6WnihBjrWWcqWGlXv00KijQJcUcRN6X1r8dfA7u4RwfSHAcw/rfkA3JK10PoD0a0v8qktRcc7nJLjYYWk18D5JuaSDl7k7BK88JaVQArQT1GQUONFud1mB8DqXj3xdP/OVpuTtjoNxJovUilMgTCn0V7sg== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from CH3PR12MB8659.namprd12.prod.outlook.com (2603:10b6:610:17c::13) by DS0PR12MB8574.namprd12.prod.outlook.com (2603:10b6:8:166::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8069.18; Thu, 17 Oct 2024 16:40:16 +0000 Received: from CH3PR12MB8659.namprd12.prod.outlook.com ([fe80::6eb6:7d37:7b4b:1732]) by CH3PR12MB8659.namprd12.prod.outlook.com ([fe80::6eb6:7d37:7b4b:1732%4]) with mapi id 15.20.8069.016; Thu, 17 Oct 2024 16:40:16 +0000 Date: Thu, 17 Oct 2024 13:40:15 -0300 From: Jason Gunthorpe To: Nicolin Chen Cc: kevin.tian@intel.com, will@kernel.org, joro@8bytes.org, suravee.suthikulpanit@amd.com, robin.murphy@arm.com, dwmw2@infradead.org, baolu.lu@linux.intel.com, shuah@kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, eric.auger@redhat.com, jean-philippe@linaro.org, mdf@kernel.org, mshavit@google.com, shameerali.kolothum.thodi@huawei.com, smostafa@google.com, yi.l.liu@intel.com, aik@amd.com, patches@lists.linux.dev Subject: Re: [PATCH v3 04/11] iommufd/viommu: Add IOMMU_VIOMMU_ALLOC ioctl Message-ID: <20241017164015.GD3559746@nvidia.com> References: <352e1701acdec6e038ccddf02227be3a1670706e.1728491453.git.nicolinc@nvidia.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <352e1701acdec6e038ccddf02227be3a1670706e.1728491453.git.nicolinc@nvidia.com> X-ClientProxiedBy: BN9PR03CA0226.namprd03.prod.outlook.com (2603:10b6:408:f8::21) To CH3PR12MB8659.namprd12.prod.outlook.com (2603:10b6:610:17c::13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR12MB8659:EE_|DS0PR12MB8574:EE_ X-MS-Office365-Filtering-Correlation-Id: e6e09bd3-b81f-4997-1d81-08dceeca6126 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?O6CD7zVM2g+xfNkH8rQVn4CyL4kuodaRWp9hCNGE5Cr4o1J+yys9xu05lB4a?= =?us-ascii?Q?sD/X08RYvDy3DNXU7IYX79g3ZHi88WHau7Yxcz8xFtT6b/Xs8T98m3WIXMjU?= =?us-ascii?Q?duIjCrl9RliGvJ31WTh59n/9YoQFQyemU6AOu3JtxksEmQc1mKlhzPe+H3Dk?= =?us-ascii?Q?7oi5E6aOYsaLzOQBGGMXdM1M/gpJhkDQr7ohe0BmMwHRxJCDAxD8U3lvMXPX?= =?us-ascii?Q?5yFi7XYIPPEaASfnSQGMcDPB6rXF+K913FjtT48SuhGZ9Ik9pFKkzG/21Tf+?= =?us-ascii?Q?iLl3XmKs5okDPV7AuFDGC+xgE1RqJxcBjJWchtLyS2M8gMZoKYXznFH8hjfM?= =?us-ascii?Q?6XxG8lk2GgpRE5FFERTppPVD2iFoZ6HPM/6q6h2S6oiwHhM/HawztsKdAHLV?= =?us-ascii?Q?Z2IJbyMQizCEAtR0PsYIUtsKBPB81csLfI7/CTvAeSrsztqdweWv9TNrplQB?= =?us-ascii?Q?1pscCWlkPu72//cEJM0Sje3sRWIPRJ3iCht5Uj5It9hAexRe9P12fBHgToCG?= =?us-ascii?Q?dnWXJB8ySCEfgw19nG6L9o/+uHU2GBxXnX5R+mUZ9aqYK2kUO+tTc88x7Mez?= =?us-ascii?Q?SOQCMDDAR8z5K97L2UOQVUBZQQ33gkFB8zqw7fbJ8a8XqAvrhgmlZVK69wJh?= =?us-ascii?Q?OA4PTDtApNKndLww7eYqcITpTSPqMWMtZxAMRaoTkFeHapy2lacxIdX5Raxq?= =?us-ascii?Q?r8UsuXoV4wNIpKTUANUCzGsQgP85cFOzs5m5HXJnYgdKvJqK5I/6VnF0TcyH?= =?us-ascii?Q?uWFDIEjyobYwE9MXlbpTYu8d6VHrNKl9jMnHqP2dpOrC9saY8poRMaWJr5n5?= =?us-ascii?Q?hjSf6PYXbYs36FC3qMhuhQF5Maior13NwUBPv6M4TppAfpmoveo5Y6pyAtmr?= =?us-ascii?Q?NTuMGn3agYEg6J7DrO+6AocFyQNzFNaHcoUtVCU3ZLY9u0tEkhnS2uOx1Co7?= =?us-ascii?Q?YltBxY0/yxDqEKA/It4FvSCMQ5q/lSaLbBwdqkZSzZc860T1zlYLxJWPjHGB?= =?us-ascii?Q?eZjJQAgSqazk/rs/9+FAOOVDNougTtuzhOImf1nOKke/hGXwQ07RA1B2J+5Y?= =?us-ascii?Q?IzTJDsizoGL2+qN1vv90IYHuTLb8QJRE0D1t0UBLfuHVpmjTl0WWC8tpBSBL?= =?us-ascii?Q?HiO7Lw2EHWFpDuv+EBFT8m9lDR1IXnvjr9s58eRMlPQ8PorsdO+WLq2ep/sa?= =?us-ascii?Q?lizYN2TRyYy/82OR4wvriNLCRRpMAqw6ojX4WcCsUvszkvJzvXKP/NFDywqj?= =?us-ascii?Q?PvOYWlCeUHJX3FFU6bCyJvFCko4Ny9vK6WVj65ONEwWCcVAxJbnxu3VWMFXF?= =?us-ascii?Q?NWIMdur6IqTkAWv5rdefUdTg?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH3PR12MB8659.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(376014)(7416014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?5JRh14/RkzBE6BFnxiqJFPIQOzREd+zjOAnvf3p7oeSVbmW1VARE4MXFRKq9?= =?us-ascii?Q?7qKd/Fp6S2WUMNaCHkXRJ8llCwJ6qF8fEJD5CP5CBEy1ubP59KllLYxTo1QG?= =?us-ascii?Q?W5f7ouSHhbPY8yaIAMq8dk9JSk0jyBn+M/wFM/rHGeJhz/6fQTk8M/quBYMt?= =?us-ascii?Q?jLbLpnzqZG/ab9ZdzG9mA4ZFCc6zjBGKv1+TRyg+KGA4OLUxUgCPAlqdSQuN?= =?us-ascii?Q?aixIKZAGTtIZmV+hFfC0bcst8GSNVm1vhpKJpzQG+b8D/4eNpuJtyNMVYD2z?= =?us-ascii?Q?0YDKgVOn6mLpGfXYYssS7wJIDFWCe4e0DhWk2ahQuAH6mNbUauP31FRop108?= =?us-ascii?Q?3fFW/EUDpBj2U1xExHBEFnEtVzdewOmkQuJkYgykI7aIMQTY2Lj5Khqadmit?= =?us-ascii?Q?4S6FsBlyXNLS3Q5UgtH14ZNCXSnPvwyFnmut9LbMSSOZ5di9GkSD8SX44Ycb?= =?us-ascii?Q?jlmEVoebjisDDkRoMxDURfLSNyvf7hySaNYN5tmNCg8e2FJJDvWEyl74Qtjw?= =?us-ascii?Q?Sf4QsC9TrOCj0Q6Zv/hVkcPWp41rncLdL3xOIMiHGrJ0hb+8iSImXf+08ZKo?= =?us-ascii?Q?zZ2u8DxlFYjRyjX1t7caapzV6QUyYjUVJnYtcJT+jcuGVRtMGWXHtVm+6u5U?= =?us-ascii?Q?O+ts3vR7cYNCRSJNJz/xgW+zPcZoTjGDqW0jfh0qZ5ZlRrV0Bu+a2R7mx6IT?= =?us-ascii?Q?QRfjo2MWciu+78Uas5FosKQlHkX9QznWWJq6YVQmkD4HEPdKB2yAd/k0RSK7?= =?us-ascii?Q?keHShqzEPUz0NH6rALqSep9d9XRt4IVd9spisFmRb8YML4wADMPsJmzKcofj?= =?us-ascii?Q?hmqkwn4wGnormV/Qrv2jJtcPcyT+z2H3IvBMI77iSyhKbuD/GqtSCmwp96jC?= =?us-ascii?Q?EPfBfXmuyF0onIV18+WP2xTgFnxdunVxe1zVH8Zqa5NUv9lmeR6SOcAbGd7U?= =?us-ascii?Q?fa9g4NTGQS/+XklW5z49nFGvp0EHId9Qrbt0UlaRTTl7WHG64u4dN/572Jv5?= =?us-ascii?Q?8SdIBw90Lmjvl83pw8nJqJScVZmnCa66t/N9bIDzElnwGEbKmx/srsk2/5Gv?= =?us-ascii?Q?07BDFlK9A47GHelM6XCde/ImbxWAauF0ylT9QPw/ly3EZGlStYjzdN2nzwcP?= =?us-ascii?Q?EPUigDZOOEe/aebo93zfoJwU4ReEzloh8inOSrHEbV/VecJlnI4FPIJ5DM2+?= =?us-ascii?Q?Kd6hkCOX7fCELq7KIFFIqlAxUT4CriH7mU60Nt3SKE/VWWfYI/jNWyxOYBSz?= =?us-ascii?Q?Gh61/lsJS2CYlT9Q2iOI2ecYH9GAlPq5s9qobZ64IKLkNv6sdWkMNDUxqI13?= =?us-ascii?Q?HKTv/lim/Nreck7OuzXAEwypJtMmwhGHE2LHUVdgRT/9mCjimkGFyYafHN+X?= =?us-ascii?Q?GQsThJttM7CHLUpzd5GqHbskVgv4vaZ2eZDZdzd17QcvlmQ43X3GrDhljkCJ?= =?us-ascii?Q?nUjhoJDrrcWWYPW1/r9fe/70PEY4DlQirR8jJ1o7ch/+B0m2uiBevCtrrfNE?= =?us-ascii?Q?WHkBnIG5PPpiLZI0ToyIgnGByydRl2l5Qm0ojHKLMJ8xIfhnqcevpGoCrBMN?= =?us-ascii?Q?5NBS7wHDRcebdLkDNhw=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: e6e09bd3-b81f-4997-1d81-08dceeca6126 X-MS-Exchange-CrossTenant-AuthSource: CH3PR12MB8659.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Oct 2024 16:40:16.2717 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: /qxnL4bKq0G4NIzAKiChgjKQvZZWvox7r2NnJXnxypbM2grO+q2fGRSb2+3Df4SV X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB8574 On Wed, Oct 09, 2024 at 09:38:04AM -0700, Nicolin Chen wrote: > Add a new ioctl for user space to do a vIOMMU allocation. It must be based > on a nesting parent HWPT, so take its refcount. > > As an initial version, define an IOMMU_VIOMMU_TYPE_DEFAULT type. Using it, > the object will be allocated by the iommufd core. > > If an IOMMU driver supports a driver-managed vIOMMU object, it must define > its own IOMMU_VIOMMU_TYPE_ in the uAPI header and implement a viommu_alloc > op in its iommu_ops. > > Signed-off-by: Nicolin Chen > --- > drivers/iommu/iommufd/Makefile | 3 +- > drivers/iommu/iommufd/iommufd_private.h | 3 + > include/uapi/linux/iommufd.h | 40 +++++++++++ > drivers/iommu/iommufd/main.c | 6 ++ > drivers/iommu/iommufd/viommu.c | 91 +++++++++++++++++++++++++ > 5 files changed, 142 insertions(+), 1 deletion(-) > create mode 100644 drivers/iommu/iommufd/viommu.c Reviewed-by: Jason Gunthorpe Jason