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 3B05BC6FD1D for ; Mon, 20 Mar 2023 18:08:16 +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:MIME-Version:In-Reply-To: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=p+0B0zHjg/kJU6wi8Ec6WyGo0A9mxGtCHxqTnbLrh8U=; b=SoZ0VKAK3CTGH4 WJr9Hfy4ERsWn/prMZXZAFaIBbf2imXoWFIYODCD/OlS0uYgKvlwj/n0AhlAuobnRT4+szQgVaJvq MZzhyB4wDcNZ4elkqvQ9yecO6VBwyR9+bm+5UoNWnddUikUhSr0qlLL1lo4cUbBRDX3HWcX72DurJ cyJ4iUFHhJkC+ehCwc3rUQksOzyShNSSAgWe9YUYyC4QPvJ78vqzO21cLxC3qz0nOBC6SbiDSKo53 0Lsei2BlvPDLIBXhcXn3SX9WM1qk6rZqJzVYffLdYWaebL1eRkHanPTbO0vyO6JL1nZH1nGl5smIK sCCTH/SZev8+JVMkTR+g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1peJuk-00A5R0-0Y; Mon, 20 Mar 2023 18:07:22 +0000 Received: from mail-mw2nam10on20617.outbound.protection.outlook.com ([2a01:111:f400:7e89::617] helo=NAM10-MW2-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1peJuh-00A5Q9-1P for linux-arm-kernel@lists.infradead.org; Mon, 20 Mar 2023 18:07:20 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=mPEuJ5V4a+qdKB9asudIM6vRBNCB67Pc9nO3fy5mhtUtwshSqBYWx9fhnj4EIUKDt2BcgbZGDBo9EpSvmwi3Ajtd+HphDSvqdAsGmz4xYYWltMxnlSv0U1j5bUEJ4rFjzcfDlJ69/N+1qlYI6YMlrkjtrqM+joKdkEagRcQRXeVeyasCbh/mcIn5hDiUZcmx7OW4D15ApYxDyKH51vPp02wZDY8G/DQqGTlvEL7OclzHAJ8Bo1kisKOatSgi375jtBePFBcPezUcET8hzNzZ3841j4zy+H0ORBtJx13Ntku8QgpRb7Cdv/2gk8j5MFNL7QhhNo6r4qwkpom0OJXHIw== 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=c5aLextkr8W0jj6WUCd7cVoha6y8ycvSx1TCotj+YGo=; b=FcOpmVZJqkOg4y0fppZ+VXkGReWKwRyStUQC/lNGrIxss7sDDPxNEPxDSJZbskuTzNNSXco17fsQrjWm5HeBvrUt9mnAMfw4tN8M9YcoZv43GsR9nh1k0SPKgH7LOQ4qVkszOOOMVyWqIJKM7pcGSpRgkSrBZ5I9Oci/lAUksmoHI2KW3/Yb6UtWaVGSrBBimAZ83ThkixgvsA9vHBw6X7WGDXOCbas6mYuP60AWeSuC1pPojlNlvixBvVKb3RhwtRIU2d9ptZKzm/g8VA5C5GHl9vyKf3xGFMWkABgVrgnDk9AvjA+DZkIc9t4ajOVcr+V1VL3JSL3Mbi9MVNJhhg== 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=c5aLextkr8W0jj6WUCd7cVoha6y8ycvSx1TCotj+YGo=; b=Q2aYA9Uq8FapyPp0Nq6i7A4fIKfax6Ikgx7WZXxip/057NfiK3mGSFGPLwq/zD6ptEgWVtAt2R3UW+N4GY2pWIcHc8aB4KURMM7zpCgHgrD22rKa6Yj9tGl858vG2CeoXkXnbDWufu3Fs7YJruwYSApo4Qbl18ym8Dgjf5mdiS/00Bai5R7bnKuo79HVQPBF4cIxYav8ys+COdW0t8KvnGHgEESmgnvSX8BXgL8h/VyhwFKnzomLKJsuhjOUejBwNvWV/zptGaEq15PsAu92qmqkVznBjWOVGxDUMGyrGPuVDsdUu5pK9v+AMXSUyvU0bGbfUX7px/+XfwQVFXjTNQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) by BN9PR12MB5242.namprd12.prod.outlook.com (2603:10b6:408:11f::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6178.37; Mon, 20 Mar 2023 18:07:14 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::ef6d:fdf6:352f:efd1]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::ef6d:fdf6:352f:efd1%3]) with mapi id 15.20.6178.037; Mon, 20 Mar 2023 18:07:14 +0000 Date: Mon, 20 Mar 2023 15:07:13 -0300 From: Jason Gunthorpe To: Nicolin Chen Cc: Robin Murphy , will@kernel.org, eric.auger@redhat.com, kevin.tian@intel.com, baolu.lu@linux.intel.com, joro@8bytes.org, shameerali.kolothum.thodi@huawei.com, jean-philippe@linaro.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 14/14] iommu/arm-smmu-v3: Add arm_smmu_cache_invalidate_user Message-ID: References: Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: BL0PR02CA0021.namprd02.prod.outlook.com (2603:10b6:207:3c::34) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|BN9PR12MB5242:EE_ X-MS-Office365-Filtering-Correlation-Id: d811e816-08db-4a05-7ea4-08db296def32 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 9wujEk3/Xqs5QYLNevKBoujkAJunbfkNFCcODyLLsjoQN9yfnv+tiTjknAvJAj4JXggYXFmOFO8uBLpXj8hDCIcmlTi41mVAkQsSbY1oTQ8wQHnAC33dA82FU3d/QlIiGodnvhKPYsbmS8W2cCDF00rnwE6VR96ORhZZCuu2oP+Q2I5xyVmpQBqTv+2bxlc9Am3Jn6ycfVXHV/i4CTEg3DTVvkI1ropXkPToBbZiPVst7df2vg4FkcU+a9I12RHzcHIx+UjK76c2zQI86ztLzSyF/fSZ84vcAy5u1mJKMe3qPkp892FRJUaEH+FI4tiU4rUvD5nvVAAv/P/Sr8s3BPO2vw91pQ6C2saiAlUcMWjI1bx1o35k0YVFKL+ZhcD6doZlFR4Rg9wrjpd46dZgDS5DXJR2RvEjjWy6khEUcqraw/3k4tTRAHccfRWLvDjDNXuZTTL0OCzzlhb6kr02je2DEmgcHD8Am+zkhQLHy6zx+THLFYjex9Vaz2prOGF8QwVeH8wtyDA6HdE09paD5JTl/y2ZJ2jWWg/oSzygSDr0P7Qe97cd6H09l0Q1L9MmxaxZp1r0duGrHhSNIPH1Ea5V0ZjwqoWGBRtutCrkQnmRPYJ2uCI69l1XC65yFpaZ5tMpOGAcBM6uZ7LuxoVkgg== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LV2PR12MB5869.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230025)(4636009)(376002)(39860400002)(396003)(136003)(346002)(366004)(451199018)(38100700002)(6636002)(316002)(8676002)(4744005)(7416002)(37006003)(66946007)(5660300002)(66476007)(36756003)(66556008)(4326008)(8936002)(6862004)(41300700001)(478600001)(2906002)(86362001)(2616005)(6512007)(186003)(26005)(6506007)(6486002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?OxBTJlIeno4c6awe8+p8eiyzuUzw9/PUnSZUAiwRYcIr56ypHG/vcJ5IxdwV?= =?us-ascii?Q?KuCp8F8FYvlYf2r1KSueurchD2orY7movGmBSgunAi0O/tcf3DtJ6ASxXHl7?= =?us-ascii?Q?2Z5rl5a8WG+tV/GwlDwvKIldcJp2a5+XDW+PBq8a4MRdNEMtKqJHPHUCNuwz?= =?us-ascii?Q?HPSez0RMo4GFet4IRABC1pG5yWWlebn3aiLriMUDbfUCqn+E4Z0a+O7DCfP3?= =?us-ascii?Q?3s9EkT2vJbGVMc3GjQnwGpJd5XHk30KyrwGCErHCek1w3td3ZM7sqSpGpANq?= =?us-ascii?Q?BDeJw8HZmLOKR3ZRonFXMnlnjEQ4hOctU8DcWOxjqYnrDvwZu635ECHtSc5Q?= =?us-ascii?Q?53RWY1tHXbSHBH+L8V2yuE0KmTA+8o8IINz5cvmR2I1q14DzYulaXlkC28aO?= =?us-ascii?Q?F7tmLbaEaNHhG9H6hu575WfZfwLUpc6qwu/EJu66SADxAPPwZvuYeHiPuHkY?= =?us-ascii?Q?l1hUoU5rGS7AKqFb//1ytl96Vpar0Yq8FNcSUQAczsjOPVO9NvXaBgb8RMYF?= =?us-ascii?Q?yKN8pXG2yf3DADy1Kn7i6yhRNsqL95Tln+uiNi46P4hLxzgeVjiHeh594m/V?= =?us-ascii?Q?uiarcH0ycwWSokK04UeYh6ieGIIJAaX35nKFelPp8VqotDjQG5s+xaU1cvA8?= =?us-ascii?Q?H20h2nxcFXP91i6wYo4at+hjNTLXU4J9EF6KTeloFT/2JbnM5+YoxgX8dacE?= =?us-ascii?Q?+rwsTxThFEsuqNTWOowQcxKNRNW6+GVvwGbfK66B7WHBrQaZGrdlvhX1U4iv?= =?us-ascii?Q?gTClcDpb3vSCoOwqF5jm21/6hdLtYnGYS5aBqXR7b0pWsZ659OL2dDEzF+T9?= =?us-ascii?Q?Hkc7leCDSTeOo1+CqqCTnvZfB9UPfMXh6YF2If5Z+2glFyHb6pdhJmy/oDjx?= =?us-ascii?Q?53jEjSq5YUMN1vnZj0wIolTUiDFdkoBdoXfJTq1LuBcw75pAd4HhNE9D4pPk?= =?us-ascii?Q?sEysUeFYh63xBj6ZRWE74V+WHCv9olafuZSlOB+ODnGq2dEi4gj/6OqT5ySK?= =?us-ascii?Q?MrsyqBGdIqWVA+WhQczQb5ifhiCiHwK+vkR9V3puTJy18z4NUsWNiyDsVnfd?= =?us-ascii?Q?xAkLDINa63Hr/oz7FFNJbxQJlGNQHcIXDe9LrtCRLfoa6s9fDMZ5cLy1k+ry?= =?us-ascii?Q?ky9WKwAN2WlmnebqL0L5nMYPj62SpxQZIBgbk8SJbQv7j+jqTHZgGdlbtLiM?= =?us-ascii?Q?R4ts+hS9yOJeyIapUyEOg2+Xj654r+VYWoq9zYDvgoY1K48PmOunS3TyNz1+?= =?us-ascii?Q?n0P/Bnx0P+k4LTYk4sG6noIwZMW45XJB5i77WD7buyIhKnKDLGBLtlZZvmR5?= =?us-ascii?Q?kHxxh8y7F2VUec+veQOAILV0UemF2hBTGoDlKMAidoIqQQDDO4aO0r3MizQj?= =?us-ascii?Q?QG9eaDQ2NjtqIINwa1zDIHfw4WkLSF4LgzqNpRcJvMLPFaabuxu62F7prDHJ?= =?us-ascii?Q?fljz/kAg/kXBIsqytU11LsQHylhuUh4MJPC6x8KmmBsjW2d2f7nqpoVnWApP?= =?us-ascii?Q?DfroF/UCqq0HqJ6b6G8ROSenDDgEGVQgIMwZxrHA9YQkVsmhIzcCaQKvP2AU?= =?us-ascii?Q?DeCqbx2NdT/mOjTW1WybFZ7Q3cryMhRIC12efcTL?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: d811e816-08db-4a05-7ea4-08db296def32 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Mar 2023 18:07:14.5857 (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: Aa1Y7NSqIv8n8vSQi9sFZlX/46riWkhnZZam06ZoUsHEDDzx3yzxBNfaFcfytM72 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN9PR12MB5242 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230320_110719_479749_34A5E5B8 X-CRM114-Status: GOOD ( 10.82 ) 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 Mon, Mar 20, 2023 at 09:35:20AM -0700, Nicolin Chen wrote: > > You need to know what devices the vSID is targetting ang issues > > invalidations only for those devices. > > I agree with that, yet cannot think of a solution to achieve > that out of vSID. QEMU code by means of emulating a physical > SMMU only reads the commands from the queue, without knowing > which device (vSID) actually sent these commands. Huh? CMD_ATC_INV has the SID Other commands have the ASID. You never need to cross an ASID to a SID or vice versa. If the guest is aware of ATS it will issue CMD_ATC_INV with vSIDs, and the hypervisor just needs to convert vSID to pSID. Otherwise vSID doesn't matter because it isn't used in the invalidation API and you are just handling ASIDs that only need the VM_ID scope applied. Jason _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel