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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D0FDECAAD8 for ; Wed, 21 Sep 2022 18:11:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 998016B0071; Wed, 21 Sep 2022 14:11:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9208E6B0072; Wed, 21 Sep 2022 14:11:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 74C2A940007; Wed, 21 Sep 2022 14:11:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 5FD046B0071 for ; Wed, 21 Sep 2022 14:11:40 -0400 (EDT) Received: from smtpin19.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 9D92DC0DEE for ; Wed, 21 Sep 2022 18:11:39 +0000 (UTC) X-FDA: 79936885518.19.280B9CD Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2056.outbound.protection.outlook.com [40.107.243.56]) by imf13.hostedemail.com (Postfix) with ESMTP id 92F4E20010 for ; Wed, 21 Sep 2022 18:11:37 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HCfYWtjCQGLOEW9YaDbA98azEw15M9Sexyva2WazyUT6sQIa3tcfyP1rDeZRWzsHvNVKS7NBhZM/1vBjQo1v/yB23fwt6pALU628JOG3P/v+oAG/d5MIYk6u4Ttg4xp3lEZs2arUg1DFzMxM2DmpYQ8Zx4wkVANd5lLcKkA0qdZUoWDSgsbJu+gOjOLrUnl9CmHm7L+p+UYfpvDAHrHrzXyrLda65VNbjMiVv26B7T8gQUPeSdekLVHUv90479JU8tNA9EO9JvEwqHKCEnl8snZp8+OzgQg/pwK2UIW0xKl+BRH0hLstY8AO9y06Ij0UmAvu28rWfuQGUylh6SKWOw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=h0dDmc/pxwLq/3xwXOFsEPRTZSudHD88fwWfl+qBdqU=; b=KdQJtVJJmHf2dulQp9xirtCjFk/PPv9idxqzCnX8bZ2JLEr3YgivTGQQjB9bY4UQb5X4lpdfHA3U36wgJW3vX4Cos8AbuxO3Df6tsxuB9sHUlT3BLyjlw//kuPkwPQbLv+NBvY+5dz8k9vGMxJvdB8Boyu8xnkgf9t+VKi8XMyRrPNlcCRyYa8PP4VRlL57ApfTUqCF1kojJ8Q2g9fJi7ZaQ/TA1aeZ/RRoS0gtKsC07gH9Nqc/Y+Z4VhvH9I5Iemw3+vhDoJFyHS4QFcTZWfOL+nNrhIE6bt0jRaBQNdOK88F0Ho+aqZqVWglCoAf2zBqNAWUrM7glUSOUCAzKmjg== 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=h0dDmc/pxwLq/3xwXOFsEPRTZSudHD88fwWfl+qBdqU=; b=ZsNUB3hB/0gMbRcSnkgN3jqNCkNeSpF4BYowHY4pxIIFJavA/HTPJRdNhX4o91+tgNBRDMHsMw0iC8KxkjrOO75hzUPO7N8SwOiwY1dlbcb6qHevoWIaA2C69t4gA4YzeYSUF3HN9haDg5Dm0+vxZBRoX2oIKex9FSltmg3zNOZILAuZZDVpqVFZAxmNAhBZU7vxkuWI1GQk1uK0vrQpPfZV8WNDZlPq5b8vefZ/IEKqvL5FV9sUoOdyJnM6VY77vo2yYJoQwhSPX5V7rX3RUV/ajRrstvwNLqkn82AoIk2Nff23ZBHnlT9MzccN6elSiOYRXFieYy4Ns/ZU/G+dSA== Received: from MN2PR12MB4192.namprd12.prod.outlook.com (2603:10b6:208:1d5::15) by MN2PR12MB4424.namprd12.prod.outlook.com (2603:10b6:208:26a::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5632.21; Wed, 21 Sep 2022 18:11:36 +0000 Received: from MN2PR12MB4192.namprd12.prod.outlook.com ([fe80::462:7fe:f04f:d0d5]) by MN2PR12MB4192.namprd12.prod.outlook.com ([fe80::462:7fe:f04f:d0d5%7]) with mapi id 15.20.5654.016; Wed, 21 Sep 2022 18:11:35 +0000 Date: Wed, 21 Sep 2022 15:11:34 -0300 From: Jason Gunthorpe To: Dave Hansen Cc: Ashok Raj , "Kirill A. Shutemov" , Jacob Pan , "Kirill A. Shutemov" , Ashok Raj , Dave Hansen , Andy Lutomirski , Peter Zijlstra , x86@kernel.org, Kostya Serebryany , Andrey Ryabinin , Andrey Konovalov , Alexander Potapenko , Taras Madan , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Joerg Roedel Subject: Re: [PATCHv8 00/11] Linear Address Masking enabling Message-ID: References: <20220914151818.uupzpyd333qnnmlt@box.shutemov.name> <20220914154532.mmxfsr7eadgnxt3s@box.shutemov.name> <20220914165116.24f82d74@jacob-builder> <20220915090135.fpeokbokkdljv7rw@box.shutemov.name> <20220915172858.pl62a5w3m5binxrk@box.shutemov.name> <562dec4d-a39f-b517-58a3-45f691a2d10a@intel.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: MN2PR16CA0042.namprd16.prod.outlook.com (2603:10b6:208:234::11) To MN2PR12MB4192.namprd12.prod.outlook.com (2603:10b6:208:1d5::15) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN2PR12MB4192:EE_|MN2PR12MB4424:EE_ X-MS-Office365-Filtering-Correlation-Id: f2dcfbad-f027-44b2-13f8-08da9bfcb899 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:MN2PR12MB4192.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230022)(4636009)(366004)(39860400002)(346002)(376002)(136003)(396003)(451199015)(2616005)(54906003)(2906002)(41300700001)(8676002)(4744005)(4326008)(6506007)(83380400001)(6916009)(66556008)(66476007)(316002)(6486002)(66946007)(478600001)(86362001)(186003)(36756003)(5660300002)(8936002)(7416002)(6512007)(38100700002)(26005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?QVEXgAevpqT9hspaN3TfyQUbgq0Fu9nNZUdQ05vReOisS1wDtB0CCAbTyGhQ?= =?us-ascii?Q?ECT8aESdzo85ju2jrwZ0yocGozw8J9kJXfK8i8QXLZyiU/HjpRrnL450QmED?= =?us-ascii?Q?WJKWfzjRZdCHpIo+6POe1Np8f+Jsd+sh0YwfymbPghlkPJBGclRUeLgifVxk?= =?us-ascii?Q?74BM3PlZz/ZST4KVwsE51xZlH0BfmLkgdESDhqtaxEl/7JXCFkwAf36ehMFP?= =?us-ascii?Q?d3e8l/fdoRzwkEml8kPIktlk18tguaai6CwVAaxW0rOCOxpg9d7tBjDOPMWs?= =?us-ascii?Q?GHpZHV4yrq9xPFz4HQpKPs4Ic8lcsz9SrOeeddERai2bOVuoZX4+/ygq4GOL?= =?us-ascii?Q?qlQS7bRrwoNEP4qiil6ZJigXhj9aazE2ZEAoLIs6BDTmaBpyrOGnr0QerFeu?= =?us-ascii?Q?QatTi9HbAi6gv2f8KXFwY+kBev8LSmuBPiV+eFR/EtUyL2R6FXh4irXHG8zI?= =?us-ascii?Q?Txn4I0bMds2dtNQfMQpOJUERrCGEDq5c28vTpCcdTHIPn7Vp/qX5TG7IZ9//?= =?us-ascii?Q?n2CxmSa3SMGUQOkQNfvE3xPgy+8C6SoKzFV8Qu/35oP0NgAjTOXGLftxPXc3?= =?us-ascii?Q?TPosF/V3Ykydbd3a/CuiFjDhoXH7cfb6w0J4lxaXJ6oLQVEr6Ea/cxHbFvR0?= =?us-ascii?Q?SA+yVKDg3t/mJHti4chOTTvt2SX4eJ+pEN4CtAXhM58vB4wmvx13SCnJwFXO?= =?us-ascii?Q?D7KmhDouIx5RPjYL+nsS+sptOMm1YyvuKQt4acSBgRrjv6ovk9MxNozsmZzZ?= =?us-ascii?Q?ZtDQCXEQamNBJQzrwSBExE5BpE4F7aQsMRmrM4ua3qwygS3X+/aGB6rzNkcy?= =?us-ascii?Q?qyK0ZwOU033JJ4mximmSS2n+Niko67HPClgIVmbf0YofmdpM1FPQxP2WYDc1?= =?us-ascii?Q?QKkN4tqhnj6Oe2lyHvX9TPEwyfm9yp/0wKQRauWpGksJbSwQGnKRbMXVKeMI?= =?us-ascii?Q?ujB78rQI98YqvYuSK6AgU8jz1/kqT5EQ8GFJ0IQBB3anK7eSwu9MoBJEI4j2?= =?us-ascii?Q?wsKU29ODffZ467oCIDcbZ22nXyA31bqbsMx7L4mxsrjl4RUiA6wpY0MEymZp?= =?us-ascii?Q?XIY9fS86VwYgQRoPr/rwL/vQVCzjGpCGoY1IX4L0zraCXjj344cXzoGEwoKx?= =?us-ascii?Q?KBBjzz5YmOsF9ZgGAPEiN9kVFfg59whKo9ismyfD5X2gKAKwxUEZtTUT1Ly6?= =?us-ascii?Q?/z3uKvxYL5+biRPEJio5cApuTE9cQ5J4iIib9y6CV98NEoZiqHylFmjfWsJ4?= =?us-ascii?Q?rmDRrNzfrRNzwlcDg6BRK0+/xTGDP4V28lXivQssg17ljH2l3i6YtR7dRpHf?= =?us-ascii?Q?CAm/c2WKGbpcGLNPouqqo1eDMkFDNbjd+yUs+VPxHah0Na07h4hdLDXBy9h6?= =?us-ascii?Q?QkMIfse5oyB04xBN6AfbgZtEZ2E9YLXQUVdKSKl0Z+TbS9PWu3TDEnYhModT?= =?us-ascii?Q?SLfI8Lp8cL6KkrywIJXtWKgf2v5wa19+czeMSVlMohl4aXetW+mNTwBuOAux?= =?us-ascii?Q?I+Fi1VnydZl9VLWIy7d2Yx7qKOkP324Fz20LrgpCudA6HsN9l1vjPYOjjcld?= =?us-ascii?Q?q7YDX1yO3LXwqHShBHRvkhihLGjFTbBpk0eIG48k?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: f2dcfbad-f027-44b2-13f8-08da9bfcb899 X-MS-Exchange-CrossTenant-AuthSource: MN2PR12MB4192.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Sep 2022 18:11:35.8700 (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: yX5OKgCCwb4a18pIadI0HpB56cw+Gc9E3N8iTANNPd5SsFqXVRxFAiadpd0A+L2e X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4424 ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1663783899; a=rsa-sha256; cv=pass; b=mcXrlvSRXH0aNzSfkYB2g+KumGM3dDaR3FH8mljUVgt+xFhrXbE1uOXS7BtQAEyTDl6tjg 2Ntfb+OkKo8C9L9PlUSdPT2fs1OfSi91iuIOMNK8zQa4ur2s099rx1FRRqUnwyY7nJuGd2 61MgNoxwVS9Kc77PxrD6k9JuosP4uDQ= ARC-Authentication-Results: i=2; imf13.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=ZsNUB3hB; dmarc=pass (policy=reject) header.from=nvidia.com; spf=pass (imf13.hostedemail.com: domain of jgg@nvidia.com designates 40.107.243.56 as permitted sender) smtp.mailfrom=jgg@nvidia.com; arc=pass ("microsoft.com:s=arcselector9901:i=1") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1663783899; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=h0dDmc/pxwLq/3xwXOFsEPRTZSudHD88fwWfl+qBdqU=; b=gvvv5Ti8JpY1xrzoPq0DsxYqZvqssYwESJLAsQBf8ep+UrqeR8Up/6YYLL4uOMHIdQJe7n rMf59NbMk9VoK1LK/8rJgk+9kR1vdrfQkIJ3jD0p+cpR1JImGesPoeqxM1RmAbOmzAp/H4 mzh3vlJEezzHl8Nuuo3qVq3ahou94eI= Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=ZsNUB3hB; dmarc=pass (policy=reject) header.from=nvidia.com; spf=pass (imf13.hostedemail.com: domain of jgg@nvidia.com designates 40.107.243.56 as permitted sender) smtp.mailfrom=jgg@nvidia.com; arc=pass ("microsoft.com:s=arcselector9901:i=1") X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: 8hikixedoin1yta9bemc6dfxioz14wan X-Rspamd-Queue-Id: 92F4E20010 X-HE-Tag: 1663783897-10069 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Sep 21, 2022 at 10:11:46AM -0700, Dave Hansen wrote: > Are you saying that any device compatibility with an mm is solely > determined by the IOMMU in play, so the IOMMU code should host the mm > compatibility checks? Yes, exactly. Only the HW entity that walks the page tables needs to understand their parsing rules and in this case that is only the IOMMU block. Jason