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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 97B45EE0203 for ; Thu, 14 Sep 2023 01:03:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:CC:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=wX78B50tc5Mz34WHT1kgA2TYmzS3p/dfA/97UEiJdRI=; b=Gc5w6njRMDJtls PrvPgh3fg2qIrw/7/PXy/8QrN1t4hhlCL/Kp5zw0DbZKS/bgSJJPW/ZzwqN/ZEWd98tz87DBI09T0 UHD+AwDLvUmwQ3TQUxcVjRwvkADDxYTUvKyDkSAJukQIzwCGVN+h1ZhG77C3kxLhvwcL3ONkxy3ms x045DQ956KsCiNSmo2I41VnyBke+UQ495FSUvJW+/fyY6CAwB4S68AV/da9GmX8Zr+OhcmtwICGi4 xuxzCU2AF8V7LjTWTVhbnO7ADSrT4pJiBNzpz4riLmR20T+obM8cqPJI/rwFDtrr0+MmR3uYo4Uo3 6zC0d9Vm1UuQoglx/FmQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qgalT-006yJx-06; Thu, 14 Sep 2023 01:03:27 +0000 Received: from mail-bn8nam11on20601.outbound.protection.outlook.com ([2a01:111:f400:7eae::601] helo=NAM11-BN8-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qgalP-006yJf-38 for linux-arm-kernel@lists.infradead.org; Thu, 14 Sep 2023 01:03:25 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=gg5b4OFNo/JfPj6D8FOzYN+xEIq4BykNo9Hki0IEZL6yu7JH2k0QD5gy2kV/37dqx9WoYhFS+A4i0suneTVmEUL6NSXEUN3OSUJ1effdptEAJcrq0ykCLEAP8840cVKtkF9fxl0o7McaapX9guv4mn4tZR8Tda4GuQJvlFxTY7hf+X8ZYrj4vAAZ5e6pVyikvasiAGK+l+ovmR6TqGEJ+rtX8QRRriE8fy+B1czo06kmsVZcDV+fctiTyrSpvr+XzjSDyS+8EcanbruSJU5qCJ1JJ8nWuU3Zhw/f2tc56C7FtEONdUBbTJl+AWivC+cRXmtbILDzpPobwOao8jnezQ== 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=vmyydSmDOzkO40VGcWQhq2zqsZnpC+chFnCvKTOJU1w=; b=JVVTrPGzzEFYdCwnCKc+DjgmZPI3crDAb5IchBZFkuR/LuRV+xkxaPcMeLT6yeiRG7qvB6lleuO/rU1khlti88m86JibNRCOvoAfjaszehi6cpRAeCrFXqMK0AQ3eRPe3bmmu6XJJYiTFU+fLC4EYzm0tUZCAvepWuEL90t5Bdylne36McAUor56OYlJNMrrD0mn9DJHUtHiEMoEW5Hq1NjrheSmvpc11X9ib1bHy/PtPaut04fygpQTFi3VTnh14x55wxlNFtSbGABT1Mn5ycFmiZZ8jem0jp+EQnVweDs8/Ot1EtFRyuGGXTNI9qvuXpXC+Iq3SVelHmWJNVPJzA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.160) smtp.rcpttodomain=google.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); 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=vmyydSmDOzkO40VGcWQhq2zqsZnpC+chFnCvKTOJU1w=; b=NFoy5bZZq03c1rvKLbf/AQ5vNPriTZq8PG1Qr2LEMwChDcUerr8kodsA2c/nUNt2zV4xh/BGb0+97E29TuBmz4iWcQy0GIfaEXNOVCXV+PP69ltQWFc9I/Ypp7GdjUWz7IaXKX8aUs6kNitMW5FMsLP8NMFlRhioEVbJM4XoLvLWKS/Hqlad1frYloju/YWubo7s7Lo3S8Mj6pPT8H9p8dSPHOKQXxN9iCyEimcFgnglmeHbNSU4P5cjUMAaQ+/rSQoTih5nk0zue2X5LNAJE6YxzXKNQpQrqgCXV84RdNqoNhbKykVFOxS1rmrUL3DxV1kHRWjyJNfOW43rYZphfw== Received: from DS7PR03CA0195.namprd03.prod.outlook.com (2603:10b6:5:3b6::20) by SA1PR12MB8118.namprd12.prod.outlook.com (2603:10b6:806:333::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6768.31; Thu, 14 Sep 2023 01:03:05 +0000 Received: from DS2PEPF00003441.namprd04.prod.outlook.com (2603:10b6:5:3b6:cafe::84) by DS7PR03CA0195.outlook.office365.com (2603:10b6:5:3b6::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6792.20 via Frontend Transport; Thu, 14 Sep 2023 01:03:05 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.160) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by DS2PEPF00003441.mail.protection.outlook.com (10.167.17.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6792.20 via Frontend Transport; Thu, 14 Sep 2023 01:03:05 +0000 Received: from rnnvmail205.nvidia.com (10.129.68.10) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41; Wed, 13 Sep 2023 18:02:53 -0700 Received: from rnnvmail203.nvidia.com (10.129.68.9) by rnnvmail205.nvidia.com (10.129.68.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41; Wed, 13 Sep 2023 18:02:52 -0700 Received: from Asurada-Nvidia (10.127.8.14) by mail.nvidia.com (10.129.68.9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41 via Frontend Transport; Wed, 13 Sep 2023 18:02:52 -0700 Date: Wed, 13 Sep 2023 18:02:50 -0700 From: Nicolin Chen To: Aahil Awatramani , CC: , , , , , , , , , Subject: Re: [PATCH v1] iommu/arm-smmu-v3: Allow default substream bypass with a pasid support Message-ID: References: <20230627033326.5236-1-nicolinc@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003441:EE_|SA1PR12MB8118:EE_ X-MS-Office365-Filtering-Correlation-Id: e086fb46-d322-46b6-4266-08dbb4be5a5c 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:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(39860400002)(346002)(376002)(396003)(136003)(451199024)(186009)(82310400011)(1800799009)(36840700001)(40470700004)(46966006)(356005)(966005)(9686003)(478600001)(336012)(4744005)(426003)(2906002)(26005)(33716001)(7416002)(41300700001)(70206006)(8676002)(5660300002)(8936002)(4326008)(54906003)(70586007)(40480700001)(40460700003)(36860700001)(82740400003)(47076005)(86362001)(55016003)(110136005)(316002)(7636003);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Sep 2023 01:03:05.4588 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e086fb46-d322-46b6-4266-08dbb4be5a5c X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF00003441.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB8118 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230913_180324_030379_FBA03855 X-CRM114-Status: UNSURE ( 9.41 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Sep 12, 2023 at 03:13:25PM -0700, Aahil Awatramani wrote: > > We have a use-case for this patch to help in avoiding the map/unmap > overhead in some cases but still maintaining support for PASIDs. This has another version [1] rebased on top of Michael's refactor series [2]. We'd need Michael to respin the refactor sereis and I will resend mine. [1] https://lore.kernel.org/linux-iommu/cover.1692959239.git.nicolinc@nvidia.com/ [2] https://lore.kernel.org/linux-iommu/ZPEpl9D%2FCqQWYhzk@Asurada-Nvidia/ Thanks Nicolin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel