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 79531FED3FA for ; Fri, 24 Apr 2026 20:50:53 +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:In-Reply-To: Content-Type: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=DUBD3xWtRbT2IVXBQ6wAHXZ19G2T2Nxr/4dvx+C3nc0=; b=v+jW8/56YZDJpsPcv2lZQTL0bJ UmZB4CMaaXc1CSvoRyOBtSF1KRj7WuLUciRobxTVtCuq9npL8znZYBsW1CIDn4ZuvmmJAuxK3zejy WFWcRDqUyjrSWYuKcWMJ+6pICOp45y1vndGj2lT77do6mt0MHr4uf801s7rE/dENr780Uh6rOVwAC dRixwQ3oIZ5323av7CbvUWrlIH5+AlPX5kOS763vzTgsigQwXeUENIAVTyxFP31fCbZn3MmsZRV2f hlFvwmk1kTRTte0rR76bz/N+LmkKkn/W4WiYyPkNjbWlykFD+8wz2NVkYU88WOVD+E4iUYf47oVOe 5IThUT0Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGNU5-0000000DkH4-0tnK; Fri, 24 Apr 2026 20:50:45 +0000 Received: from mail-westus2azlp170120002.outbound.protection.outlook.com ([2a01:111:f403:c007::2] helo=MW6PR02CU001.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGNU3-0000000DkGh-0rFF for linux-arm-kernel@lists.infradead.org; Fri, 24 Apr 2026 20:50:44 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=B/b27/nEuXpebYvyV3s+DI82rq84eDGVIdWtRbTHciWAVLPtXH9lF9TiWccWQCBaYuXMsI+Q9V5iZo0VM0shBECytTntMThbUeU9C4g8ar/tR16xAifrNy+tqhVD98Ime7UiMkt3ip2fpQx2/2eyIkIfuqRF8E41IwspsQpRD2LfbXuffHVIszAsNL05sDB0eHOG3YmkWX92spwreP7HHAx+Yti7Hc44ZAh00PNMQcJcJMpCek6yMLIelRwsYNFZEVEMSoMkhSJo9l87DBFqVJ8Gzc+Qz8I8vh55twoqtx/KoCan20Z59l0kXrVUVbwifIqpFw2RxvuWFqAw1klcXA== 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=DUBD3xWtRbT2IVXBQ6wAHXZ19G2T2Nxr/4dvx+C3nc0=; b=FF/mX1Sp9617dbIqPA6Z1GI2dQ3554abV2fX5TN5IwxnpgdXbHozhuk1OyFT3M3lo6+n3Z54DjrPHmrRFm+t3CLDtw3cL9oC10+tX7EnKdLyqS50+HfKmwGxzi1oDW/U0lvAquID570rGHUQPF9l+Dc1+5nhXw8spa0Egob0cCtk5ZDK/MOy69s2o2pMIZL2LW7XIQhYfGJWn0R6sg3dIYfE+9EwdYxPG1GM0EU0vdRfed2xTPyggGTOwPgELx4HY/ruI8XjA4gkiHo3JXnAx4B4IciwPpyWOWNAUJ5UWiWDNWoj8jebluaaHMK8cnrjDQWI3P3bis6OS8ij5HRv6A== 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=DUBD3xWtRbT2IVXBQ6wAHXZ19G2T2Nxr/4dvx+C3nc0=; b=uqP/b5mfkB2RrJ3i73cMcP26D+aGPRYPrr9lpuUBCCERMWvgtIfsRjzrXN93BZ3V7DEf5UjEbUVLG85cSMB/8cbLrKwjf+ZdA8NcyAFrzsky4ZFivMgJv0Tdedd2qHdrGQM0dO5wLSFjHmtGR+3fclmUdkywaSaiwmfYvSc7hXJMjyvfMkhX1b4j5qlevj3xhWc3a88Hh9vimUTmAwZBPW8E3m9m4ZHhmM//4Gv7rMk0ZfrBctNC3wasvNPKMQVdNg2JN1yORuAuHmbHLBJ8e62sSNkqd+JJvQVmGZaBqcWKLZmNcqHtLLUUmHzXXmG4j+DuWPk8+3pNnsanxBUYog== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV8PR12MB9620.namprd12.prod.outlook.com (2603:10b6:408:2a1::19) by CY5PR12MB6131.namprd12.prod.outlook.com (2603:10b6:930:25::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9846.22; Fri, 24 Apr 2026 20:50:32 +0000 Received: from LV8PR12MB9620.namprd12.prod.outlook.com ([fe80::299d:f5e0:3550:1528]) by LV8PR12MB9620.namprd12.prod.outlook.com ([fe80::299d:f5e0:3550:1528%5]) with mapi id 15.20.9846.019; Fri, 24 Apr 2026 20:50:32 +0000 Date: Fri, 24 Apr 2026 17:50:31 -0300 From: Jason Gunthorpe To: Nicolin Chen Cc: will@kernel.org, robin.murphy@arm.com, kevin.tian@intel.com, joro@8bytes.org, praan@google.com, baolu.lu@linux.intel.com, miko.lenczewski@arm.com, smostafa@google.com, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, stable@vger.kernel.org, jamien@nvidia.com Subject: Re: [PATCH rc v2 1/5] iommu/arm-smmu-v3: Add arm_smmu_adopt_strtab() for kdump Message-ID: <20260424205031.GK3444440@nvidia.com> References: <20260424165613.GC3444440@nvidia.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: IA1P220CA0007.NAMP220.PROD.OUTLOOK.COM (2603:10b6:208:461::17) To LV8PR12MB9620.namprd12.prod.outlook.com (2603:10b6:408:2a1::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV8PR12MB9620:EE_|CY5PR12MB6131:EE_ X-MS-Office365-Filtering-Correlation-Id: 63d3c52a-6dcc-4aab-9ec1-08dea243205f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|366016|18002099003|56012099003|22082099003; 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:LV8PR12MB9620.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(7416014)(376014)(1800799024)(366016)(18002099003)(56012099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?42BYWIkXsNW/2tt71Gch+cVaJZeDdqgcUnQK4hWgGZccutx6fINl6+5BCcLq?= =?us-ascii?Q?9VP7e8atw+x9mvyCxXpEWEg4L0M7nSCX2VT/T8eV3wWdUKM2PBvDka7odFZy?= =?us-ascii?Q?DHc6VMCcCcgOM99OwAjfOHwZQkfF3KsdhdDtvASpoQlsFWbCGneY39IRz6rs?= =?us-ascii?Q?0cEkUNTmMz4wVS4Cdwdo9jMQ8CcsqRci7TKPjjNiqwhURdw3d9b7dJNgb91q?= =?us-ascii?Q?1MhmgWMEKCmK2PTW8EwbAjV/QpvNI8it5SzlUjlkuQFRt+qNuIBCgveVxu+W?= =?us-ascii?Q?8RpCjJy+wzpdleBjz4QkE26V+m5zFwg4rpnT5KNmc11LkYKHbCLsFMg3I6ma?= =?us-ascii?Q?s5ubcmETgfsmwV+1ZMCA71EX8dE7S2OtLrP52apwAxgOQfngVcY8khV6xrys?= =?us-ascii?Q?2RJZLctmhZppwQXSh+mjlRbx5rh1+huI5QCvYGni16NaRCoZeVW6T9Svbkkp?= =?us-ascii?Q?jQ8l+e0ZGF567B6fbqlYh76ihoqQPibT2a3C/E2/bs8PSqKCt+M6/NzSCDAU?= =?us-ascii?Q?VWuXywVo1QiagpvmNjgCpmqlxD4Racr/yz4EwvWEPASpAxStH8ghebgDDbLk?= =?us-ascii?Q?dyTUR5KC1BGzYAaHc4kBfNKCvFZCKjV5D1I7KmHOll7IVMotQnloyOBHkKwy?= =?us-ascii?Q?sCNtsImEww4i1NEkjPIlxj9Fu5MREBQAlANwmyjNqJrSMqOtUXKPz8LWli50?= =?us-ascii?Q?t0BFrVVX+PPQ1ta+SBbj/yBH821pIsp3uccK9xoUCntOiJMIK1V3MQuVeWzY?= =?us-ascii?Q?Rpjd1NzAMNfETPXNSRCj76VKTeyUt9g0eGdLQ/yDcEm1yJFQmM3i97VQj9CK?= =?us-ascii?Q?JSsnIO4jtL2ZjEIrQF9Xuk6Wu7+sljl0/h7d8UEkiozpnhDSqeKyimZPujcN?= =?us-ascii?Q?0d5v15AmTyMHeySPCdcV6h2AvYgCmorirzjbhhquN5TcWnoEtR6mSJfXw6Ye?= =?us-ascii?Q?W4oEEXE1TyIA1W+80Ir4s7n2DdRDKgeOmAasC5ZG4+IA7DyvburOYVaQ5ccy?= =?us-ascii?Q?s9Jt4nK7ziPfMuWIbmfRqwygFsusbP0/VmX3rmZjtPqW2IwAL8A/VPHMaQma?= =?us-ascii?Q?f9IFmiNXR0fPCf+w2LLzaVdvprJIfIOmWvmtwgSis2C9/XGBaD9U+r6J2wAY?= =?us-ascii?Q?M3Zgu0mGz50P9ijS/iSl+NvtgW0pacSVvn+praloZhs0Bc2bj+toYO2xXr2X?= =?us-ascii?Q?7sq/aAsQwIZqgGaamevFiu/nsobGgx0r6faGd8kAPcUqkfYFoyzgdR5dgCn9?= =?us-ascii?Q?f+TIcSFhWzjTisnrcf5dEll95v6b0MDSxY2pjta9wKV6lLhACSpujeqNWcS7?= =?us-ascii?Q?u93+VxlzW/VDfyJZCtA2QLjDuxCZ2uow55e2kWEKn7B2A74BgCIwO3Djf4wT?= =?us-ascii?Q?f8QV0uuw38H2momyGH+fIiibgLFCEchGPELHS9XHR87018k63kkiC/cYQXb9?= =?us-ascii?Q?J3PD1nBMFXyk/YHHCO0zqEmMQ/gQkQP9VP66vyOLEcPvdTVfvRRC4blFpn5/?= =?us-ascii?Q?Y3BtuGYgFL8hcPSCyymTEqvfQ5Bt7HneZ/TfTxMAQ1I0IFDkb/srEbB+eU9b?= =?us-ascii?Q?5LSNBCjj58QssFLCdmKehwmPrGH1pJ3rARaMWD05PFXItINTr6rtDf5NRQyx?= =?us-ascii?Q?PGcVfXMuIa/KoCTOwARlmlSKcDzTUUhRLQYo3EogHI8nQdboajZ9Og0F2cPy?= =?us-ascii?Q?GXm7yRf/7V7s3kt03uxbUbXIOaC8VxHFUMZxgndAcdAxIzNw?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 63d3c52a-6dcc-4aab-9ec1-08dea243205f X-MS-Exchange-CrossTenant-AuthSource: LV8PR12MB9620.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Apr 2026 20:50:32.5351 (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: eBrPDKUip0jwDf5l6KorDi4fml7+mAkpmQS5w2H/R2WPd/clJxmzkhZkZpQJ8cBE X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6131 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260424_135043_268208_BE5B6785 X-CRM114-Status: GOOD ( 11.93 ) 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 Fri, Apr 24, 2026 at 11:33:16AM -0700, Nicolin Chen wrote: > On Fri, Apr 24, 2026 at 01:56:13PM -0300, Jason Gunthorpe wrote: > > On Wed, Apr 15, 2026 at 02:17:36PM -0700, Nicolin Chen wrote: > > > +static int arm_smmu_adopt_strtab_2lvl(struct arm_smmu_device *smmu, u32 cfg_reg, > [..] > > > + cfg->l2.l1tab = devm_memremap( > > > + smmu->dev, dma, num_l1_ents * sizeof(struct arm_smmu_strtab_l1), > > > + MEMREMAP_WB); > > > > WB shouldn't be unconditional? If the SMMU is working non-coherently > > we need to map it NC. Same remark everwhere > > Hmm, I am trying to add a coherent-only gate for the series. OK, may just add a comment to that effect here > MEMREMAP_WC might work. But we cannot verify that on a coherent > SMMU, right? At most you could fake the smmu to noncoherent and check it maps the right thing and assume the arch code does it right Jason