From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by 2002:a17:504:5f65:b0:1be9:327d:8ee3 with SMTP id gl5csp3545748njc; Wed, 26 Mar 2025 12:28:52 -0700 (PDT) X-Forwarded-Encrypted: i=3; AJvYcCUzIKq5vU4FeJ+OLG/VbCCllUwph32xaX3DDWK2n30yPeQ6iDKQ3ZmSDTTWUwGtTD7HwX1P+cv6BYSUQw==@linaro.org X-Google-Smtp-Source: AGHT+IFpY6ofKnFvmYn5tjlRp1/PrT11qlTR97xu4yv4T2v6T0a1LCcPnQwC2CP9DLlWIT+/buWd X-Received: by 2002:a05:6214:4105:b0:6e6:68e3:8d84 with SMTP id 6a1803df08f44-6ed23890ddbmr10062596d6.18.1743017331957; Wed, 26 Mar 2025 12:28:51 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1743017331; cv=pass; d=google.com; s=arc-20240605; b=YJ89g/QzVizZc6nt3T7UOHW6cOAIBh7h3Z+zp67y/dZSS5For5lr0uUbL1Zgj5KDss T9dCRS/f+cJ7JUQkFc2PwMQ4xOw1/B3EdXCbF5SzU5TBljrdJ/Jm1mNGuCClkYmx5js7 rJ1wLN4fdZmpLlS4l3Sq8/z4r2k74BmwiXR1J34ki/n5PJvc9OZ3o5UFbtPewVzk9L9i OIb4+vAxILKqA+/efSsnQBLUo/ROoV28RzHhM2l2w9q4og0kyZR4Cw/j3nU8zXOGkUhW PdkA7QW8cE1vDciXmKSJMPyWLmQqrhddl3ZrdBik4haYoSSus9rsTwaZswbysReymBQQ cQIw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=gRrvf20+mRjhc1O65XdzHFxlY0Tsh9aWhuLHkJftEbM=; fh=2rogdRHQGBnLsnF43BtzbJVu8JVADCgbNQ4PvFSxoAI=; b=iX1dRoTn/z8h0NsuNwRbt2USTra6YH8anDaKjQKNcEP12XNBxprd3KhJpWs8zevpTj LhDXh3MRLAem9b+c3mxKaipNjgsjrHYdUO58xO5hxu54bJjZTDLE4Z0dVXtlSkajPjq5 wahB/bzxWzGWEdS79PoQi4OCtpla7H6pTs7qHzKdzwo5JaLIXopM4i7/iMZRpKkjMgsa QTKgLYLqdTUjLRVhoMChaKJ3PQU08EiDPh8kdGvnHhz77WuoJPktEB/gEE3HLxiYyAoM sQn3sOTr/2h++XNre9hWLrsSRURH5u1CLbo1IQPCynHJShDv4yVbRR8lK67sTeSYibt9 NN1Q==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@Nvidia.com header.s=selector2 header.b="op5CMP/7"; arc=pass (i=1 spf=pass spfdomain=nvidia.com dmarc=pass fromdomain=nvidia.com); spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=nvidia.com Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id 6a1803df08f44-6eb3f03eda2si122109826d6.390.2025.03.26.12.28.51 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Wed, 26 Mar 2025 12:28:51 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@Nvidia.com header.s=selector2 header.b="op5CMP/7"; arc=pass (i=1 spf=pass spfdomain=nvidia.com dmarc=pass fromdomain=nvidia.com); spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=nvidia.com Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1txWQI-00088b-JI; Wed, 26 Mar 2025 15:28:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1txWQC-00087G-46; Wed, 26 Mar 2025 15:28:17 -0400 Received: from mail-sn1nam02on2060d.outbound.protection.outlook.com ([2a01:111:f403:2406::60d] helo=NAM02-SN1-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1txWQ7-0003e8-F5; Wed, 26 Mar 2025 15:28:14 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=y95YGrSLQ9P9E9kh52e+Fo3a4+G/GhjJhr+OHp7xepVgNsnPf128HeqjcYU3BSlo+c/c/+7VzkN0VdrWFu/cPieHGSZwvhAbzWuIoPmhU9JJarhnK3zRgaA1GCA1R/cABnNoPF1goP9+buoZj6Qy2ttB12uZm3lI6yR68CB4jAOM2gpaqL33cQNGQlBp8E4kf01EESJCuzewg00yN20RzvFzRQ0KFVO3b5vzSSzYsDkvh+reNcRPfk/duszeezG+UvcGE29HVMCG1vMQc9NKmGBFWuuI6F1gjKuhLjb6bL1YPgUW/QnJC6JUnut+VM0ST7zTIXYGttehQpRKoN8xzw== 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=gRrvf20+mRjhc1O65XdzHFxlY0Tsh9aWhuLHkJftEbM=; b=kzRIjnjhXL7xQ/6cAbjWQHilNjlEDSF4OlghSmoQUEzKzFQl5dLBXuOCdoISDdhdvteZfp+ei6peuYNKfki3KA3tsiry3YU3qtnlK8Sidytuygbfrm9bgH2iRNIW9hLxjFUfBXK8K6Aa2wYzomnPxFbltTZY8Oz7rUZX6s5zDWz6JqpwgD4qsDos5vFolBXniP8/FadduAGqMv9ooPsNqtaqNruCEuoQLYu1zfhiix6LAvY+HjeMNGQQhsfnSX5DWJzUkC91B8PvCgWMJ66viaTv6htNwM9Jw1NvTKBbp9ar55xvZrQT4MU4Z4GVrbraLs0yfpKw4oqyGGsVvEjLnA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.118.233) smtp.rcpttodomain=redhat.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 (0) 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=gRrvf20+mRjhc1O65XdzHFxlY0Tsh9aWhuLHkJftEbM=; b=op5CMP/78onRq1pGLwS/pw3RP68BpJiCPK/jo/5r1btJkreZvknADcklmlo17M71g8sBV5PhIGrGdmH9b77FAaw4oHdyqvbN1rqZ+VbWJoO8vLIYhDy6+Xx0rCgMfmYKlkuWlYdGj34Iq0P+3ca2XTRU42CVpzVZWUM/gYcl2iZ8A30NC/WRjxyVK/smY9sYBpP/nS+DUAxL7hqqEajdXuTrdYcz4RIrFoHzIJhlZPFlgoKEnoCCEFRRgenJU8gVmKHPUMCUc5zIJO1p3+npOUKCANtsF+Dew8H1yS43TjZwRUrWwnUoOvqYpBO+d7teB1C+10H1lLxNfzbYyehwNg== Received: from BYAPR05CA0021.namprd05.prod.outlook.com (2603:10b6:a03:c0::34) by PH7PR12MB7940.namprd12.prod.outlook.com (2603:10b6:510:275::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8534.42; Wed, 26 Mar 2025 19:28:01 +0000 Received: from SJ1PEPF00001CE8.namprd03.prod.outlook.com (2603:10b6:a03:c0:cafe::2b) by BYAPR05CA0021.outlook.office365.com (2603:10b6:a03:c0::34) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8534.36 via Frontend Transport; Wed, 26 Mar 2025 19:28:01 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.118.233) 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 216.228.118.233 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.118.233; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.118.233) by SJ1PEPF00001CE8.mail.protection.outlook.com (10.167.242.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8534.20 via Frontend Transport; Wed, 26 Mar 2025 19:28:01 +0000 Received: from drhqmail202.nvidia.com (10.126.190.181) by mail.nvidia.com (10.127.129.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Wed, 26 Mar 2025 12:27:53 -0700 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail202.nvidia.com (10.126.190.181) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.14; Wed, 26 Mar 2025 12:27:53 -0700 Received: from nvidia.com (10.127.8.10) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.14 via Frontend Transport; Wed, 26 Mar 2025 12:27:50 -0700 Date: Wed, 26 Mar 2025 12:27:47 -0700 From: Nicolin Chen To: Eric Auger CC: Shameer Kolothum , , , , , , , , , , , , , , Subject: Re: [RFC PATCH v2 15/20] hw/arm/smmuv3: Forward invalidation commands to hw Message-ID: References: <20250311141045.66620-1-shameerali.kolothum.thodi@huawei.com> <20250311141045.66620-16-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00001CE8:EE_|PH7PR12MB7940:EE_ X-MS-Office365-Filtering-Correlation-Id: e97a46b7-5582-4a3d-e674-08dd6c9c52b3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|36860700013|7416014|82310400026|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?y+Ewe+uoNIeiLQBOICXdSW/yTvtFiw4t9amgG0qb+u8fN06dWb9xSL0fPFtb?= =?us-ascii?Q?PBT6JkTvIKjFQDirpxMVAVhm4kOU0VGimOtPql0+0c85VBVAkot8JuPuVMPm?= =?us-ascii?Q?fQZLHsBajyy1HSEO/BxMY2Vrou4bFgrHeMQYAXnQLUQzrRiQ37Q9RgDhRiDP?= =?us-ascii?Q?nC7LuPbtv5fHI/zJS9lsR02gw3nJgEyiOHOmdCR5tXHgtrloGtRSftCV3Dk1?= =?us-ascii?Q?RgNE8g6AAEo7x4HTaqrkfJy6hQVDkA+8Kf85s6qfqdFjpNd7COeet+sK9Joj?= =?us-ascii?Q?TShdf1b5+qL7g9G4o9vmjoZcc1i8X+MBG9aAt9hgRgn0a1/DqxgigUIXyzT9?= =?us-ascii?Q?yw8dzjM4wSrSnRGaXEJui2lQVa0pk9MqLeVnb+0t3HF7WO1pIv1vzGYJHCOU?= =?us-ascii?Q?NwGfhV04n8Y6q4HQoTcR57IR3yDilbQuUnpfs3pLORUfmxNj+q47yvryXH5x?= =?us-ascii?Q?Akej0+4k/yFBagreHABSgI3wXmR6brbzlfwf+QSoFxmsmqVrCL0RPdKtilin?= =?us-ascii?Q?RbN+dAJxV5mlis/ChzdrO54H+xsZMYcSC7rZOHyH02E0p6DkLlSSSX9yOOzw?= =?us-ascii?Q?r5NS+7+MsxuCi5yHB7RF61zC31kM0qZ/VdX6nrmOckCWWDrcekzJiSzIBDTP?= =?us-ascii?Q?z8eR3lqiNDKhVm8VKeGxmWbqEZBpIAyDHYcZS85/QAw/6NA6xcDqd65TQ4oz?= =?us-ascii?Q?a07iVbmv8uSJ71ulESDxvS/Rt/u9mrQgYDRWGzEzU/XEZvvMKrZ1SegFdb6S?= =?us-ascii?Q?xMejOFumrhmN+decGU9u0sBk9p9Qt8LvPReErm2bADFc9QDk5+ydT+UkvBTP?= =?us-ascii?Q?TTXBCknpKapm9nJnLNMBeOu7R4II0wKwRXqCmJ3MViBzDK+nUgYfCMNCsOqD?= =?us-ascii?Q?V8AsxPgoOIyCw6nSBZxL9rX2m6le8yf/o8PnRuK0TxGXX0w/s7Ruz4vQEXfY?= =?us-ascii?Q?WK9X1CCVcEGkBojZO6m1D+AxnCg8/rlESPkQbAbhgM6h9HDu6Hi53CZk+69A?= =?us-ascii?Q?v84yBnILshu67v/U4c+PwDRcOKx7LFIaTOQmWJdhS/ic1SUCHuUoU7+oK7rg?= =?us-ascii?Q?jRRJW0JPJkpE3U2rm7NEe0h4El08Fl4riIwTalZ0G1dZVFyClEEQOzRfcqZI?= =?us-ascii?Q?DNplxanVvuslsbPPUpLcngpk8UKFJLkLjBKgme1oXNpM/JFAAN70+z0ZTzFv?= =?us-ascii?Q?I2DTSX+tJQ9wgIR/ZukwTzo8orLd89ctUfgVfJhMP48EqxpOs8VmyVYWxBHi?= =?us-ascii?Q?b48To1G/50Os1JikSdemRjTft3aZVgavbpVhn93nHiBeMAH8yg0HtT+B8pTC?= =?us-ascii?Q?27XngMdbgKrqoqs5NlvOCjYzNylEzd0e0o6auyjjQNGCWf9hIUj7aUwLfH4s?= =?us-ascii?Q?5GAf7jy9GoDvIJfN1dbpMlPAYpsM1rwE8/7Vkk9N9wrPU1VD/kUNWdF+F+3y?= =?us-ascii?Q?fXUE/GrCvAr92xm2SeyUU8hmWg94Y0W1dbh/OxKzQvChZKTnFyPQGG91+e0f?= =?us-ascii?Q?ns4EafaUx8lCkdQ=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.233; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge2.nvidia.com; CAT:NONE; SFS:(13230040)(1800799024)(36860700013)(7416014)(82310400026)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Mar 2025 19:28:01.4385 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e97a46b7-5582-4a3d-e674-08dd6c9c52b3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.233]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CE8.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7940 Received-SPF: permerror client-ip=2a01:111:f403:2406::60d; envelope-from=nicolinc@nvidia.com; helo=NAM02-SN1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org X-TUID: tyb1m45bkOvz On Wed, Mar 26, 2025 at 03:16:18PM +0100, Eric Auger wrote: > > @@ -1395,6 +1403,13 @@ static int smmuv3_cmdq_consume(SMMUv3State *s) > > > > trace_smmuv3_cmdq_cfgi_cd(sid); > > smmuv3_flush_config(sdev); > > + > > + if (smmuv3_accel_batch_cmds(sdev->smmu, sdev, &batch, &cmd, > > + &q->cons, true)) { > > + cmd_error = SMMU_CERROR_ILL; > I understand you collect all batchable commands all together (those > sharing the same dev_cache prop) and the batch is executed either when > the cache target changes or at the very end of the queue consumption. > Since you don't batch all kinds of commands don't you have a risk to > send commands out of order? Yes, that could happen. But would it have some real risk? This practice has an assumption that the guest OS would group each batch with a proper CMD_SYNC like Linux does. So it could reduce the amount of ioctls. If we can think of some real risk when the guest OS doesn't, yes, I think we would have to flush the batch if any non-accel command appear in-between. Thanks Nicolin