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 6CF53CD6E56 for ; Mon, 1 Jun 2026 09:05:03 +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:MIME-Version: Content-Transfer-Encoding:Content-Type:In-Reply-To:From:References:Cc:To: Subject:Date:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BuOhiZbwnwad/+u/eGXQfHXWI5NfzU7WUNYe+EGZueo=; b=okoFovYscwQt99XNekbL03+JzF n2ZAaBa0kRBK703wgxZQNog1X1qDCFDjbN6fcph+DOgcQ6B2Ru7xAIsp+c4fKF3AMwTsCIUHEEcXI i1nZvJxAJ4h/YBHPvqh7V8lQcmdwA/IrEWar2ecVSWPKzkcBhEiMwNN0cQGxcBVm2mrNUbpKSKi9j meCTZWjO2DzrZmToD0E6Nsrz5fYzhfIH2Vb6ixsonJuz5ERKwr2+XhFGBQy8HZTYynQtIL6j2JPgl x3jXjJV35Wp6TehKngTpifyD7kxyfA70gnXjUuBhfWVHjdGUzlD395jOqUcpxsv3xQKajPJPogF7S BHnHtLgg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wTyZs-0000000ARxi-0jy7; Mon, 01 Jun 2026 09:04:56 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wTyZq-0000000ARxb-3ksf for linux-arm-kernel@bombadil.infradead.org; Mon, 01 Jun 2026 09:04:55 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=MIME-Version:Content-Transfer-Encoding :Content-Type:In-Reply-To:From:References:Cc:To:Subject:Date:Message-ID: Sender:Reply-To:Content-ID:Content-Description; bh=BuOhiZbwnwad/+u/eGXQfHXWI5NfzU7WUNYe+EGZueo=; b=Ab+DXZWvitearB1C5sP6XYxAvM 7DM4QbnGnkt81TiCXicxoyFP0pGb3rTyoCtO1vXB5x87oeo0kq6FvXjnEK70gy/PxkNOV6Ut6sEDS gaSB1iPNXis/kuBEbsEeXlBhydKmLBux2qzAxE/9STZPM3pn4b0vYQxNmBcihhkcy5Uw4/mGY8FE4 J6hI4Mq7I7430cFEh3uvpHu9hHzuXhXb7xrRCNuJhsar0RbKXubQfU6vHHxcEG+/zqbcb4M2+3fpq OYN6byAsJhpNRQ7XXPrrQsh94R3W+ZG1nSnQ99z4RC9U8ES/1/t4hFF/NoW1bmMWrDV1N7bMVSxgc Eq8npvxw==; Received: from mail-westus3azon11012021.outbound.protection.outlook.com ([40.107.209.21] helo=PH8PR06CU001.outbound.protection.outlook.com) by desiato.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wTyZn-00000006AZB-2YmZ for linux-arm-kernel@lists.infradead.org; Mon, 01 Jun 2026 09:04:53 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=qXDoDZ1zt9/MeZBh+QbQTGOzy3wR96YEGylNqFuzISi0yDaKYLo647nppmRSiywLQisrXV4fIVX/UpDi2QaB8PUIFq2aSdQxc6yVESV8MemEu0IlmdIWyfC7ETIkaQVLP3WSbEvSYHIjM13eqj6XaLH0klvzZbJvYk17Sff5LyLbVkxTURrmm1Hmi+/4177szZVeU3QKNjgIs/Swdxsllww6SRENevRsRro26/B7YVgspJqlYWKD2UooPjM39h+zlxBiV55oOEqLabQBhTwvjLBJnRZE52WYlQbA6oHzW2ttT2CGo+ytSTuhHKnVWKlUmV0OUH7srE2CNkOiuHr1bw== 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=BuOhiZbwnwad/+u/eGXQfHXWI5NfzU7WUNYe+EGZueo=; b=A1Z+bFzHki+vcdGgL4rbolbaHTA4Lu4NwJsj94WJ0NOxNUnbJfdGEnAvbHqByQPZ5XN9Zm7c5pZ5MoaTN0VwKEQJXngEgeMbSpco4g/clv3jz2t7JMFjHkFDOZJ671fHPZRXypX8q3vVbAx4iq7X4IDchvaj74V8BgaljvQa136d3qXaVWdS3m5mR5nPMFUkz1NUobfEapV5QxCDGygt6wQn70n9VrKKyzp4UcmTU4nlEOWz2dNHa1RpbmXLWb/c6LWkpi3Qw9+xVB/IRj4D6n2qyiTQPdijz6sY57oi+64or1cDlM0sq3ASPhZq48NoqVHY2cUwC44tzANrCAx3hA== 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=BuOhiZbwnwad/+u/eGXQfHXWI5NfzU7WUNYe+EGZueo=; b=jhxu7BlYmFYiZWFwRf4ID0ptKjAd85qrlfsfPNO21soh4cHrDBtwijw0nC3RK9jzGdObRW8virjR+y57xpwRKVUiNpO2FomBGvdnHY2BhV8CrA5wsHq187JQtJSGm99io1BxD1H+fuiD4JKXjWGuqyyWRge1se2IvbW4jVnRDRlcAVgROgMQ/nYkGk2HKC031HK4FAHZRKqZ6dW9e9UqzrnlfYZMNo2uWiYr0FvtBcbnU9SVIIJ2m34cvysZ1B1uKZUcaLfEZ+wKZgfuzPEpaJUjiblonNWMOH9EyRxJGz0DuplM6l4MzGNCPPv5WQZfa7EP4dZdDjbeKPzBDtNzMw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from BN5PR12MB9511.namprd12.prod.outlook.com (2603:10b6:408:2a9::14) by CH3PR12MB7523.namprd12.prod.outlook.com (2603:10b6:610:148::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.71.16; Mon, 1 Jun 2026 09:04:44 +0000 Received: from BN5PR12MB9511.namprd12.prod.outlook.com ([fe80::4d8d:5f91:6c3c:dc8c]) by BN5PR12MB9511.namprd12.prod.outlook.com ([fe80::4d8d:5f91:6c3c:dc8c%4]) with mapi id 15.21.0071.014; Mon, 1 Jun 2026 09:04:43 +0000 Message-ID: Date: Mon, 1 Jun 2026 14:34:37 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] iommu/arm-smmu-v3: Detect Tegra264 erratum To: Nicolin Chen Cc: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org, jgg@ziepe.ca, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org References: <20260529140830.629738-1-amhetre@nvidia.com> <20260529140830.629738-2-amhetre@nvidia.com> Content-Language: en-US From: Ashish Mhetre In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SJ0PR13CA0172.namprd13.prod.outlook.com (2603:10b6:a03:2c7::27) To BN5PR12MB9511.namprd12.prod.outlook.com (2603:10b6:408:2a9::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN5PR12MB9511:EE_|CH3PR12MB7523:EE_ X-MS-Office365-Filtering-Correlation-Id: 64d7c581-43d8-46f8-3761-08debfbcd262 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024|11063799006|18002099003|22082099003|56012099006|4143699003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BN5PR12MB9511.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(376014)(1800799024)(11063799006)(18002099003)(22082099003)(56012099006)(4143699003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?RXlkYnJDd1lqRjREQVR6ZWJJZXk2RzJ2ditVT0N0RG81MThaaUNjSFNMeEZy?= =?utf-8?B?VG52ZGpVbTlpYTBMZmpOY1g0OXRTTHlldnB3SE5LNk5GQUFLOHhIZ2F4U200?= =?utf-8?B?N3VndWtQcjltaUdGaUhJMkVXNy9zaDJtbXNsZjYvZ29qR0FxekhBTUJoQVpO?= =?utf-8?B?QW1vUnNoa3BZRHJEbzZ6VTduUmIvMFZDWWNwY3BiVC9UWUlPelhOSG4xWWMv?= =?utf-8?B?U1dhN2Nhd0RDSUVyM3ptdVFIOVJnRitkMThTVTByd05kcVVSU2czMzVFQmxo?= =?utf-8?B?R0x0amtFRnNZL0hzNkRhMjA0SkRwbitaMnJnNFl2aExLeXhpM25CSi9DVy93?= =?utf-8?B?SVdqd2RkZE44aGhYWkhBMTkyVXlYVTVTdWlUVjBpMmRJU2d2bDcvSWoreFg5?= =?utf-8?B?bVZNZEtXRitCUFRzNTVUVzVpRzI0emxZckt5Ti9oUzQzY0xsajBuVVY2TElB?= =?utf-8?B?TVN2YURERTEvUTBicm9jWUxDYi9JeDBaaGFIYVVVVHZQZjExTy9zc29VdlhW?= =?utf-8?B?clZOYWpLRmtNUGgxT2VHdjgvVE1Hd0gvOEpKQytKSWplRzF1cjN4SThoNkZK?= =?utf-8?B?UUVmMUVYWGF5bUZSQzRXb2Q0cmRyQnU1SUhZRDJ0TFRsSkl5LzJUSFppcjhj?= =?utf-8?B?MGd0N0pkQ0hYcDhNSGM4Mm1DUnFnRDNDY25OdnM3OW5nZmVFVzVZaTBRQk56?= =?utf-8?B?Q2dWZ3R1dFcxenJqdnVKRjArVVVzZVRQeVNOcGFXcDAzMnNNRnZVWWhGMHBV?= =?utf-8?B?a0RwYW1WaDNSRWNxcmN3RlN1V2I2RU9PUUtKZ2ZSOFQ1d1dLbTdqV3JBZ2dT?= =?utf-8?B?WWpycStiQUlUTDU5bXduSko0NWdnS1VOZ2ljRHNnbnpVdFhTUndtNXo1dTJF?= =?utf-8?B?cURZL3l0REZRTFJRUnhNYmljbzJSSnEvNHdaVEhwZ1pUZ1dvdldZT29tLy9H?= =?utf-8?B?d3RXUzhBeityVWNmNEVhRUhuMzg2WHdaY1Q3V25RcVZHRjVRZERaU0g0VGNZ?= =?utf-8?B?TCtIeHNvWmgrRms4RHV0ODJ2UDJYOVBqQXZNM3pNWWp0UGR1WDZwRFA2VHNn?= =?utf-8?B?YVVCZnJsdlF1azNVWWlaQ0trRXZQenZUeUl4OWpNMWI4enM1WDFNSE1WU0Ez?= =?utf-8?B?d2dzWmtIM3JQb1pEOHFJa3lTbTFwL3gyNWVUR21IdE0vMnRSdXdKL0RJSGhx?= =?utf-8?B?bUZTZEpacjMyN2FZeGgrWnE1Mmo4Zis4RzllbVFGUVNCMVJTZVBzNTh2bnJj?= =?utf-8?B?eGNHUytUVk0vU2VwVEtoZDdRRGtqSkJrWnpUR3pTSjE0alV4bjUzblBtbDBh?= =?utf-8?B?ZWVSWThZRmgzazl6cWlaRExNRnZNTEZ1RHM3N2xmcytYVGZXN25nTWlSdytl?= =?utf-8?B?OHkxRzI0NVRaNkFKeWdvWkdFb1BLZ2xRSGUra1BGdm5UZkhkWXhzNTJOUXJT?= =?utf-8?B?QmhKKzdGYjBPVDByNWM1aWVSM1MzY3lTRVE1SUd3enlJWXlsQTZObk1pZjg4?= =?utf-8?B?UWFSalVKNHg4YkVtT0pBS0JXTm42WHhrcm9Ka0piQlFZY0ZjcjVrSW41b3ht?= =?utf-8?B?cjJaM0lGakZBVHhNWE1hTXJ2UloyeWJtSlBFRitvR0N5K0UxZDNRU2trRHZi?= =?utf-8?B?ME9TVFU1NlFrN2xxdGpoZlFKak9ldmd4OTVybUxUUmV4ZUVmeUE5cTY3RFhD?= =?utf-8?B?VDNqczJUZE5wRFN2WnRGVzg4TklwWFErWDVIQ0lHVGtranFCQTdEZ0M3Q0JV?= =?utf-8?B?MlJsWHR5eGNqQlVobm9UakRMclBZektpV1JCVHdyUU0zNVpzYWVmYUU3R2Y5?= =?utf-8?B?Rm1iM0t3clRzaXlVY2tycWhYUGlNaytPM25QdU80amFWaE9oVUlSOXZwS1d2?= =?utf-8?B?Y085TTJ2LzU1OVh5aXlGbS9ZdGhhaEJUSCtJdGR6UHp2clM0QjFQWDR1VlJO?= =?utf-8?B?WUxuMEYyRmZwR3JLYWZOSHIrVk5OeVBUUHpMdE02TmtDTEZONHBzdVBTQ0Ez?= =?utf-8?B?R3RKLzFvTUprK3dmZWhUTmhzV0oxNnpWTnV3WFl1cVpWUzMvcEtCSzZsaU0x?= =?utf-8?B?cnI0QVZmMkZGTE9DNGlKZ3RKT0VGSU5ra0lzZnlvWkR5UFZTSENPb1JrVFp2?= =?utf-8?B?SVRIWXBiSFZiRlU2LzhudjNvK3FxVnU5NFYyVXJSak5xRlJUWWZwZzdtcmtt?= =?utf-8?B?L2VFSjVwNWtNK3ZuR1g2Q1NWSHZ5bUJKYlhQUVBXdXNYOTBsZk00SVkxVVBi?= =?utf-8?B?T3haWkdZWE9wc3ZHTStCbTNPVDA4SDhhSmFzTXptYUtodHJIUk5Idzc3SGtU?= =?utf-8?B?K1lRazJpbGZlRU5sckhscStRbVBlbW90K0lqZW1OUC9zSTF2eUxFZz09?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 64d7c581-43d8-46f8-3761-08debfbcd262 X-MS-Exchange-CrossTenant-AuthSource: BN5PR12MB9511.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Jun 2026 09:04:43.8580 (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: YneRyTMW62EpPtq+b6GbngqJYNuKRaGHWG5mDGB2niiRGavbx76ADuQSk/SxIxb/b4Lm5kGH3umJ5aabEAlksA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7523 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260601_100452_037650_87EF5525 X-CRM114-Status: GOOD ( 13.32 ) 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 5/30/2026 3:00 AM, Nicolin Chen wrote: > On Fri, May 29, 2026 at 02:08:29PM +0000, Ashish Mhetre wrote: >> Tegra264 SMMU is affected by erratum where a TLB entry can survive an >> invalidation that races with concurrent traffic targeting the same >> entry. The hardware-recommended software workaround is to issue every >> CFGI/TLBI command (each followed by CMD_SYNC) twice. The second issue is >> guaranteed to evict the entry. ATC_INV is not affected and must not be >> doubled. >> >> The erratum is not flagged by any SMMUv3 IDR/IIDR register, so it cannot >> be detected from hardware register. Tegra264 boots from device tree only >> and has no ACPI/IORT support, so detection is through device tree only. >> >> Add the ARM_SMMU_OPT_TLBI_TWICE option and set it on instances matching >> the existing "nvidia,tegra264-smmu" compatible. No callers consume the >> option yet, next patch wires the workaround into the CMDQ issue paths. > I was told to avoid "patch": once a patch is applied it becomes > a commit. So, maybe "a subsequent change will wire". Sure, I'll update it in next version. >> Signed-off-by: Ashish Mhetre > Reviewed-by: Nicolin Chen Thanks Nicolin.