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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 15D73E92FD0 for ; Mon, 29 Dec 2025 19:58:34 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vaJNc-0003DE-2o; Mon, 29 Dec 2025 14:58:14 -0500 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 1vaJNS-0003CW-8P; Mon, 29 Dec 2025 14:58:02 -0500 Received: from mail-centralusazlp170100005.outbound.protection.outlook.com ([2a01:111:f403:c111::5] helo=DM1PR04CU001.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 1vaJNP-00033f-EJ; Mon, 29 Dec 2025 14:58:01 -0500 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=LWpC2cQIvSl8L9ZuQhDHxqDADwyhGmtisfeSUrlcR5heFFhvy4PdATxdwcz68Pvo+hcDnPuWMaLYaynar2JJzf6dmfm4zXULrdmHGj0CObpTI1cma0NLIbT95mS44y4uKEKFMGri3tPnPWj7eOiDc4lihvq15KQK/zebQDrFq1Q4qj7RqQXf5Q17p7qfgO5zNbo1GiinJVYDjyymEntI5SIk6MMF6NHCC3itEh0h/64qjR6yLZJh9X+e+o4bDcwZrO++BLHza1QJXjbT+5WWEGop8QDrj5R0WSU/SJ+wpV/orPUiX5lOfVk54CRQz46teYLTw9vVohHt/qRYeuO4Lg== 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=4sl/umNwqePCuJsZiAqEF6xfjmBlSD75f4jE6SFexSc=; b=QHV2tsCzpiyoyoIkYCMZqcMA915kmHcdKV1i60R71zLhYW+px5AtWQJ6OxNUiXgpjTvIu/GXlR9MQ9ned2kgfKGIpg1QjUOnW94hg3wYgvUOe2IxF0bRN5nk2aagKlN+EvjWlVi++VZroYIUfE1i4qt/9dIa+2SO2hXrh4q7uID4dSkYOFTnM8sCFUwwYwChjSMJPz0WCrbv4jDwo3hIUO8JBD8K5N72vxD+x6QPumUnuHrLyK8S/5LTL1lIurwICvxJ3oI8srxv007W6x/qgqa1Gop4PBV68SmkBXRuaB12pZm5xX+GOvgQbtlkPffTv63g22PRWMit5JwheviZlw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.160) smtp.rcpttodomain=nongnu.org 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=4sl/umNwqePCuJsZiAqEF6xfjmBlSD75f4jE6SFexSc=; b=NZ4FLYHEzmdhIJgXviafhU9/D7uMIQbbxEVvqkWct9k81fd8btxBKQAsl6uOPHUonGT67aX7/LDU3qaUHIuTFeCxXEzb0b/cTx7GtHkIu2y2H/cS8su1rhZn5XUMVpJ7SOc709zy7Y7xQ8gsyLITZbNhOJMf5gTvUQyhvgO93b8jT6p53rAX9xCWULCvwCGmSK9ImSwtGud2bWX8W9XpHLbqe0wTJuK7BgjGcvUtjYGGXL7hGcEPXl51eINA6eZFZJYiyHuebSdiOIEa1BRz6puYMVXglg3ZWdAGo10gG4FBXt8o4QRFj3MKDWiPkDhD4n1ag3m+zM2eVz16iIrW2Q== Received: from PH7PR17CA0010.namprd17.prod.outlook.com (2603:10b6:510:324::10) by DS0PR12MB7897.namprd12.prod.outlook.com (2603:10b6:8:146::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9456.14; Mon, 29 Dec 2025 19:57:50 +0000 Received: from SA2PEPF000015CA.namprd03.prod.outlook.com (2603:10b6:510:324:cafe::34) by PH7PR17CA0010.outlook.office365.com (2603:10b6:510:324::10) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9456.14 via Frontend Transport; Mon, 29 Dec 2025 19:57:44 +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 SA2PEPF000015CA.mail.protection.outlook.com (10.167.241.200) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9478.4 via Frontend Transport; Mon, 29 Dec 2025 19:57:49 +0000 Received: from rnnvmail202.nvidia.com (10.129.68.7) 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 15.2.2562.20; Mon, 29 Dec 2025 11:57:31 -0800 Received: from rnnvmail204.nvidia.com (10.129.68.6) by rnnvmail202.nvidia.com (10.129.68.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Mon, 29 Dec 2025 11:57:30 -0800 Received: from Asurada-Nvidia (10.127.8.9) by mail.nvidia.com (10.129.68.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Mon, 29 Dec 2025 11:57:30 -0800 Date: Mon, 29 Dec 2025 11:57:28 -0800 From: Nicolin Chen To: Shameer Kolothum CC: , , , , , , , , , , Subject: Re: [RFC PATCH 13/16] hw/arm/tegra241-cmdqv: Limit queue size based on backend page size Message-ID: References: <20251210133737.78257-1-skolothumtho@nvidia.com> <20251210133737.78257-14-skolothumtho@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20251210133737.78257-14-skolothumtho@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF000015CA:EE_|DS0PR12MB7897:EE_ X-MS-Office365-Filtering-Correlation-Id: 127e7ad8-3053-4117-59fc-08de47148b70 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|82310400026|376014|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?2UgZYqpvC4fzWA5wptsT2JrW/+r1VjUwqnegJeaKHV6WG4lSwe9LPLkQ+XWX?= =?us-ascii?Q?NkJRL6VaXlALNu6o1Nkx2WOGTqlOYfN8+h4dP0apXVbhixSOLCW5c3yw2k/s?= =?us-ascii?Q?iZBT/zJZ4VcdNvVKR9wptIX44WOq7+u0L5+JeiQ8EVJUyfsGicBEe+XZY4n6?= =?us-ascii?Q?XX3BExrnxw5mtSfeGi6uaDRCXr0H/gRXZKOcaLLTF1C2sH4sW+1Hy2Lwv/F7?= =?us-ascii?Q?+mgDjkRajbTkkO9s9MYAUVzgA2Zd1+bFZhSL/miOYfjwZToEOrY37jEmiz8f?= =?us-ascii?Q?kO/0UOrV3KVBU+iCND22djN6Ej1TVp2lfFH4G51AWTeHCZ+sT2/dOCxmGaKb?= =?us-ascii?Q?pKKWi7wXwgSVbuIPVugUyYlxIde9NcJqUH72MnP0QpY4Kppmrg/X55cP3xZU?= =?us-ascii?Q?p6tUVf5kCyobraPRmOWTE7OQrZryS77xXfKP60uPW4CWtqhThGWgweRp7ZQ6?= =?us-ascii?Q?QZbIP6bxvQ3s8mGkN2442FRu8uNOi+JM5XU1ggNo+50TqEHN5u72Lli20Oon?= =?us-ascii?Q?PKLIwmnjgLWMRn06zz0uq5Ixt9WH+uBAm6gYPuZ9FbIJVc3uejM9RTi4y1z3?= =?us-ascii?Q?b/FYec64pqKkQ41HsJcyOa5juohbk9jAsR7AESqbGviNZ7kW6Rb/azR084Vp?= =?us-ascii?Q?hSe+KEu8g6npYibEwVuft9wnGxuvOpnhW21qR0lByT79bri4IqCOLelATCQo?= =?us-ascii?Q?kD4QDV1sQNYiKJ50YkpU9pNUVTnCZr4JGgqJj9er42q34OUPrW7/CLBToQdF?= =?us-ascii?Q?gnT86/lcPQ9rsphfCgkfr/PSnYgR8WTmMxK5C/xmq7PMjOnPn5HZkELSQU8O?= =?us-ascii?Q?m4F0/Iyrl9TBjp2E0IccsYtMwfNwXgQdvq8uZ3c9OKGTL4UD6dKXqqV60RZR?= =?us-ascii?Q?hMYa8G5Y3z1kf/qStgO+1lmjz58oNPxuZ9sBevPUvNtHZXYzq0oUj2Fhjj+A?= =?us-ascii?Q?Thw5iPQgB0NOyoTqAbc7EL0Aee3PIxQXhWfGRlVE1vVIAf718jByHYZDgM47?= =?us-ascii?Q?adcoTpba7gID1CIPlknHX8APoJY6tePcMALLFSfIooweOVUmzE42vIkows9h?= =?us-ascii?Q?rrdSBEHGp69REfK4W5t5MHTgQxmX8/c65oYJw7PKyejdYwCnSc+682LKsbYO?= =?us-ascii?Q?L6OygghC0fj0sCj/6S0yPT4SXuc/KjJy/TRG354ZpxAwn2+OuCFEGqPd969D?= =?us-ascii?Q?8f8+D8FT/O+rq4d4FComuca9fCO2BBBSG+xb+bbtt2ssd6kZGg9qagcNqhOU?= =?us-ascii?Q?BfKmcH7RGGvOlzn5F5Ia5yRt3dPFErYKhrnDEYj/jqteeQn9UhXj7op0/dL1?= =?us-ascii?Q?YaV5zJr5h4qpu+NZZuiRR4YdKJgM2vBzgHT3pyRGG0Isew9DtpGxUXZSk37Z?= =?us-ascii?Q?toBV26tWQvdBnlo2N+n5cTgLlgn7OVDLC/eLqws7KvaTQAxlrHBuzQNT4xC+?= =?us-ascii?Q?ICDkJ3kqOoIZ21RFJ6uMD2vmWOrg5N45b+2JsEHeFanhH/zhjsTV7WGSv2qc?= =?us-ascii?Q?/3zx/Kp+Jy9jfNyQUl8tPWwPWROuG14dwmk1Gt58NicUq68klscm6QZT3STg?= =?us-ascii?Q?Zv9GoILVeeoNCrcU9po=3D?= 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:(13230040)(82310400026)(376014)(1800799024)(36860700013); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Dec 2025 19:57:49.5971 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 127e7ad8-3053-4117-59fc-08de47148b70 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: SA2PEPF000015CA.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7897 Received-SPF: permerror client-ip=2a01:111:f403:c111::5; envelope-from=nicolinc@nvidia.com; helo=DM1PR04CU001.outbound.protection.outlook.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 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, FORGED_SPF_HELO=1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_NONE=0.001 autolearn=no 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+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org On Wed, Dec 10, 2025 at 01:37:34PM +0000, Shameer Kolothum wrote: > + /* > + * CMDQ must not cross a physical RAM backend page. Adjust CMDQS so the > + * queue fits entirely within the smallest backend page size. > + * FIXME: Migration support requires this to be taken care. > + */ > + pgsize = tegra241_cmdqv_min_ram_pagesize(); > + val = FIELD_EX32(s->idr[1], IDR1, CMDQS); > + s->idr[1] = FIELD_DP32(s->idr[1], IDR1, CMDQS, MIN(log2(pgsize) - 4, val)); Let's mention it is for the physical contiguity of the Q memory. Nicolin