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 6873FCD5BD2 for ; Wed, 27 May 2026 02:41:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:CC:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XZzBqMSx1o8TRFdsCqVPcptv1wrHvd61VkooOhlTvBQ=; b=nu7yqCTGO6Fakj3SpaUvzsoLHz b667UAqjRk3Zs/37arvRYiqIrOBxcdhKPrYGclN9d82ZTp/Gl2iVtg9M/UTcN1nX9fjYUOqjnt8kK mC4DA1KdVc81Nz2011C4OTRLVy0uTzP26U+bi/iqwsqx7eNRZIzUMS6zAullWPVgFl6L+1PeV1IzY z9wPlfYAu7AEEK79vZlthp3P5hMTDLhQf61QR92ADpdbhJaIL22HNB66WDHeFM4ZHd9C7l90lQIrO ZfVf9imUcV6f43fKftbFttmFvcDEJu7xfyMLJeza3gt0l2+Yix4HC+UDrlAYcLHfAEzzvvueSYWhu 8ZXbIUfQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wS4Ci-00000003B2G-29vy; Wed, 27 May 2026 02:41:08 +0000 Received: from mail-westusazon11012002.outbound.protection.outlook.com ([52.101.43.2] helo=SJ2PR03CU001.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wS4Cg-00000003B1i-2K7r for linux-arm-kernel@lists.infradead.org; Wed, 27 May 2026 02:41:07 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Zml/9wiiexDQaVV+/4aOJDhljj3I0muuFbA6xHrzpW8vgjAEsz5vVf5y/H9wm5/Fx4IbcT2Ac2TW1JT9Y1iXHMarDh6UXCSr6KtUwvBjI1mOb+mFKMSN66d2ppkKj4KElLFayFXUbVM8YUrQH5+BK8zxEVi1p5i4os1SA2rYBAVBIgqHNqU+XoTphj1ok03ivnkI5u0LuhmQuG7bl4UU6pLBp3awjGIiv8CosclaHbCxsw9Mr0Ws2hF38PJzZwFXiKTSP3VoZPeorWJNb9/H1Xc0aCQgFngWkgVwzpm8RHtvnAnXsDMinPT7qzCH5u25I/xN5Kmjz7KOkw2hf3jtXQ== 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=XZzBqMSx1o8TRFdsCqVPcptv1wrHvd61VkooOhlTvBQ=; b=fHK1E76vDEx28pTY+gsceW6rRu32PphpQ/iI4TtPoGQhUgPN3OP752DShULkLFllFsTZ7Nus+PsbbDaE3EeHuiu1DSNBL3JWrvnHVNuG+MkmCRa6Lb+pKPjRFa6s5nt4Vx2mX21S2Y2pzg3qBdA9rXLKGZn/+ISKM/h/bU1Face8tTVmc9bBC9d8QIo6tPlDt+QNUR0SzAX38tLIUEo6tSVuP0yv0N94fyz+AYUoMn9VO+LUvC19ZOjvnS2kmJazvgVy9TqPdDwnUzh1RZ8xI+WMrVPN2Xz/zVdG5r6l377PspVzPVZG345BqKon0cVF+hdW0yHNOl906BuyJe3Ltw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.160) smtp.rcpttodomain=huawei.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=XZzBqMSx1o8TRFdsCqVPcptv1wrHvd61VkooOhlTvBQ=; b=RqEtPtr38+TAN560ov7IHx+uuYF5LC9cq1Tb8kmPB1HlErVzfBSbw/wv/cmYOB+3oEKN0zwiBTJGQdxU/rGPLBACkmjezDe3hqu4qWqbr0WKnN7EWZdYzwIgFSpdRLW9xjFjifh1ux0OLfqOdEJwzKqXrEzFQY9+FuRQvLObmNpmeOw2WyT8wdVUWqaGw6UpYOKXc5gvLtpHel1/6aI3lF+2qCIK3btssus7qpxOVY7mDsY8bBBfq93ubIHAg/iqCKeoxwct3SRSNOdRjpDae0RYlgNX6YOd52h13P7zl18gl8oR/p6fYNJSgn2ZN6lL/3ayZHyb17QKhaypnlfC9w== Received: from CH2PR02CA0022.namprd02.prod.outlook.com (2603:10b6:610:4e::32) by PH7PR12MB6540.namprd12.prod.outlook.com (2603:10b6:510:213::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.48.14; Wed, 27 May 2026 02:40:57 +0000 Received: from CH3PEPF0000000C.namprd04.prod.outlook.com (2603:10b6:610:4e:cafe::30) by CH2PR02CA0022.outlook.office365.com (2603:10b6:610:4e::32) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.71.12 via Frontend Transport; Wed, 27 May 2026 02:40:56 +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 CH3PEPF0000000C.mail.protection.outlook.com (10.167.244.39) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.71.7 via Frontend Transport; Wed, 27 May 2026 02:40:55 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) 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; Tue, 26 May 2026 19:40:36 -0700 Received: from rnnvmail203.nvidia.com (10.129.68.9) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 26 May 2026 19:40:35 -0700 Received: from Asurada-Nvidia (10.127.8.13) 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 15.2.2562.20 via Frontend Transport; Tue, 26 May 2026 19:40:34 -0700 Date: Tue, 26 May 2026 19:40:33 -0700 From: Nicolin Chen To: Qinxin Xia CC: , , , , , , , , , , , Subject: Re: [PATCH 5/5] iommu/arm-smmu-v3: Add Context Descriptor display to debugfs Message-ID: References: <20260328101706.3448655-1-xiaqinxin@huawei.com> <20260520063714.2440584-5-xiaqinxin@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20260520063714.2440584-5-xiaqinxin@huawei.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PEPF0000000C:EE_|PH7PR12MB6540:EE_ X-MS-Office365-Filtering-Correlation-Id: 0fcd523d-030f-4976-ac29-08debb996066 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|1800799024|82310400026|376014|7416014|4143699003|22082099003|18002099003|11063799006|56012099006; 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:(13230040)(36860700016)(1800799024)(82310400026)(376014)(7416014)(4143699003)(22082099003)(18002099003)(11063799006)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: v+q93Z/l+kxqR/JXIBFul5idU4f8id2hANXDIvWJCOnyu0dC+vBs5JigrybMLzlH1lnr/MwLlQknpsQrSz4wkU/EMY4N02tprI73i+88IbeBALQm+4LQCpKAxK7/NihtbPdKBppYYFU6hulB4v9aqIepHkBMe+DcJGy16EGyTEGqqNc6iIdPVjQ5tx0pF0DdRnK4tZ431CHRjQjQ1UICdavjnIM6uSWZQY1CEQ6vM7ggJHhNw8fOeNwuWlLaiaEUjsYX8tXo4LEu7ZaEaRULzG7bEcGnamj13/CLZeZOvDutwCAfZM8LaHg/4wpshPQYhKE4NQ3q3etbExmLxWAw2hoTTYrDOSiaFp+Bz8zcqL0+zap4MhYYZbQcjGTn2XgJ7qDprf7Wait0NrVXeeD+q0Nwl40wMw93dJYv79bLw3k2iKFT7ckhby6nWGiMrqT+ X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 May 2026 02:40:55.3297 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0fcd523d-030f-4976-ac29-08debb996066 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: CH3PEPF0000000C.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6540 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260526_194106_605226_28F5768D X-CRM114-Status: GOOD ( 11.12 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, May 20, 2026 at 02:37:11PM +0800, Qinxin Xia wrote: > +static int smmu_debugfs_cd_show(struct seq_file *seq, void *unused) > +{ > + struct device *dev = seq->private; > + struct arm_smmu_master *master; > + u32 max_ssids, ssid; > + > + guard(mutex)(&arm_smmu_asid_lock); > + > + master = dev_iommu_priv_get(dev); > + if (!master) { > + seq_puts(seq, "No master data\n"); > + return 0; > + } arm_smmu_asid_lock fences against domain attachments, required by CD (yes). But, it doesn't fence against a device unplug. So this might need both streams_mutex and asid_lock. Nicolin