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 X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70B04C4151A for ; Wed, 13 Feb 2019 15:51:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 36B13222C9 for ; Wed, 13 Feb 2019 15:51:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 36B13222C9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C7A2C8E0002; Wed, 13 Feb 2019 10:51:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C50A28E0001; Wed, 13 Feb 2019 10:51:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B40938E0002; Wed, 13 Feb 2019 10:51:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-pf1-f198.google.com (mail-pf1-f198.google.com [209.85.210.198]) by kanga.kvack.org (Postfix) with ESMTP id 731478E0001 for ; Wed, 13 Feb 2019 10:51:13 -0500 (EST) Received: by mail-pf1-f198.google.com with SMTP id t72so2148046pfi.21 for ; Wed, 13 Feb 2019 07:51:13 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:subject:to:cc :references:from:openpgp:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=fgQsZ6VxUSCnuA6WERI+ivrgHoQKon5VtEFEmujHWUI=; b=QguzKWXPrtQsXBcjEEplwhDAa3KDWa61rNJ3oH9bNTtV3ePK9ztw7b5o7G58ktWYIi BtyXmaxIt1IzSyhevMkIbIvKrqJYN8JyRmDuK5FV4mokbzLUJiOa7ZQKJeukEqyuS8ds Gr2uM/6O3VNWkxpyukgtN1k5OJarJPH20QKs0Xe4IEXaFlEJT/5XMG+p/KKFP3dNJmJy SyxjCEWk1oreTttpUKlBhFy5Zu+wB26KR+7GmjFOmAH09JI2TJ5bYBRR11uuC9D+BgDe 8M6D2mMdnlfuSKAiqBR9HH6RFlEqwVHoU7mmtliPgHY39elYkmJyMsD4AwC5Uc4FHUTo 3bbA== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of dave.hansen@intel.com designates 192.55.52.120 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Gm-Message-State: AHQUAuaSGV7g7+4tnEfOVWRJPhLIa6siraRfIUqw9uU8GsHAQNh4PD63 Wna4/BhiksmmDV82J1rHyEgjRC704bOGFYPKhx9gOjGZ2iMRmkYv+wvfs3kLmLsHCfRWqSSxfQD DB9gDTwy0yYwQhYsKIriiuKKSYef7Xtjyjz8NaQyPshUz8rWsyOo7aGu9R4+fksb5FA== X-Received: by 2002:a63:160d:: with SMTP id w13mr1025615pgl.85.1550073073165; Wed, 13 Feb 2019 07:51:13 -0800 (PST) X-Google-Smtp-Source: AHgI3IYWUaED0SzmSbeWpZTulZGfOM9o29+zDJMIN45/oRcNp4Q1n7oMDmHkcZ5MxjOJfsVgOMGO X-Received: by 2002:a63:160d:: with SMTP id w13mr1025582pgl.85.1550073072541; Wed, 13 Feb 2019 07:51:12 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1550073072; cv=none; d=google.com; s=arc-20160816; b=qEMnPZaZT4vT3rkHEEkJm2jKI5T80ApX3f03togne0vUcPeyr0IqjCEBeyb6TjP1mt S96AQ7wNQ6QI9UoWlaRss7vaKv1j9dB0Lq7ksnE8K5Mfw4WjrZWHGPty9g+i8nxAHi05 8V3FtC7mYWp4oUy3zTqy7kt1OMk32rIpG2YbjDzRmJZdW9Li4SA+3gvXR5cxRW0fvX4f 4GVKeMW9MzQQunwdSejyrUik6VRPbBCx7OFydsHLqD1aczUqrD1TWYpT9wgM8Ppf2kYx 0tqYaeMoIceI41ZkBxgiF6Ke3NliyU7gQalCU4QC7Xesx1p4ekQDx/dWRfieZ/3DOgaC rOVA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:autocrypt:openpgp:from:references:cc:to :subject; bh=fgQsZ6VxUSCnuA6WERI+ivrgHoQKon5VtEFEmujHWUI=; b=bBtlZSwwaFhBQhfXE7Gt3/s9KTgTtZsYDxPQgRaEqHRsjW5JrRCkn1WsJ2iVlQaxYc hLn3mC/J7JnP5VCrtluKevbMefbvp/NC3ugWTJS/OLYjuWkznPbzU3lHEuz5fVpf53xs NcBqOb0SbVdZ7q2jUoh9l2b6MK2DnO6FSeqDGicwcWeZDDUdwMvv/SPA5Kdo9GB7F7y0 0qJeQRWawCCqZlCzkQQXcw7S8POajMpdjlqzyrCun8zyDQeVKEWH92BaUQOcSakIiJFe oB3xHkgByiFRoxsrxffmNHKCKBKZX8jicrA4mEqob5ltMWA5ehtvlo4t0iu9M4e6yax6 snLA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of dave.hansen@intel.com designates 192.55.52.120 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from mga04.intel.com (mga04.intel.com. [192.55.52.120]) by mx.google.com with ESMTPS id n20si6904026pgb.195.2019.02.13.07.51.12 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 13 Feb 2019 07:51:12 -0800 (PST) Received-SPF: pass (google.com: domain of dave.hansen@intel.com designates 192.55.52.120 as permitted sender) client-ip=192.55.52.120; Authentication-Results: mx.google.com; spf=pass (google.com: domain of dave.hansen@intel.com designates 192.55.52.120 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Feb 2019 07:51:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,366,1544515200"; d="scan'208";a="143945163" Received: from pmmonter-mobl.amr.corp.intel.com (HELO [10.254.87.236]) ([10.254.87.236]) by fmsmga004.fm.intel.com with ESMTP; 13 Feb 2019 07:51:11 -0800 Subject: Re: [LSF/MM TOPIC] Memory Encryption on top of filesystems To: Dan Williams , Dave Chinner Cc: lsf-pc@lists.linux-foundation.org, linux-fsdevel , Linux-MM , "Shutemov, Kirill" , "Schofield, Alison" , "Darrick J. Wong" , Jan Kara , Christoph Hellwig , Theodore Ts'o , Jaegeuk Kim References: <788d7050-f6bb-b984-69d9-504056e6c5a6@intel.com> <20190212235114.GM20493@dastard> <20190213021318.GN20493@dastard> From: Dave Hansen Openpgp: preference=signencrypt Autocrypt: addr=dave.hansen@intel.com; keydata= mQINBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABtEVEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gKEludGVsIFdvcmsgQWRkcmVzcykgPGRhdmUuaGFuc2VuQGludGVs LmNvbT6JAjgEEwECACIFAlQ+9J0CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEGg1 lTBwyZKwLZUP/0dnbhDc229u2u6WtK1s1cSd9WsflGXGagkR6liJ4um3XCfYWDHvIdkHYC1t MNcVHFBwmQkawxsYvgO8kXT3SaFZe4ISfB4K4CL2qp4JO+nJdlFUbZI7cz/Td9z8nHjMcWYF IQuTsWOLs/LBMTs+ANumibtw6UkiGVD3dfHJAOPNApjVr+M0P/lVmTeP8w0uVcd2syiaU5jB aht9CYATn+ytFGWZnBEEQFnqcibIaOrmoBLu2b3fKJEd8Jp7NHDSIdrvrMjYynmc6sZKUqH2 I1qOevaa8jUg7wlLJAWGfIqnu85kkqrVOkbNbk4TPub7VOqA6qG5GCNEIv6ZY7HLYd/vAkVY E8Plzq/NwLAuOWxvGrOl7OPuwVeR4hBDfcrNb990MFPpjGgACzAZyjdmYoMu8j3/MAEW4P0z F5+EYJAOZ+z212y1pchNNauehORXgjrNKsZwxwKpPY9qb84E3O9KYpwfATsqOoQ6tTgr+1BR CCwP712H+E9U5HJ0iibN/CDZFVPL1bRerHziuwuQuvE0qWg0+0SChFe9oq0KAwEkVs6ZDMB2 P16MieEEQ6StQRlvy2YBv80L1TMl3T90Bo1UUn6ARXEpcbFE0/aORH/jEXcRteb+vuik5UGY 5TsyLYdPur3TXm7XDBdmmyQVJjnJKYK9AQxj95KlXLVO38lcuQINBFRjzmoBEACyAxbvUEhd GDGNg0JhDdezyTdN8C9BFsdxyTLnSH31NRiyp1QtuxvcqGZjb2trDVuCbIzRrgMZLVgo3upr MIOx1CXEgmn23Zhh0EpdVHM8IKx9Z7V0r+rrpRWFE8/wQZngKYVi49PGoZj50ZEifEJ5qn/H Nsp2+Y+bTUjDdgWMATg9DiFMyv8fvoqgNsNyrrZTnSgoLzdxr89FGHZCoSoAK8gfgFHuO54B lI8QOfPDG9WDPJ66HCodjTlBEr/Cwq6GruxS5i2Y33YVqxvFvDa1tUtl+iJ2SWKS9kCai2DR 3BwVONJEYSDQaven/EHMlY1q8Vln3lGPsS11vSUK3QcNJjmrgYxH5KsVsf6PNRj9mp8Z1kIG qjRx08+nnyStWC0gZH6NrYyS9rpqH3j+hA2WcI7De51L4Rv9pFwzp161mvtc6eC/GxaiUGuH BNAVP0PY0fqvIC68p3rLIAW3f97uv4ce2RSQ7LbsPsimOeCo/5vgS6YQsj83E+AipPr09Caj 0hloj+hFoqiticNpmsxdWKoOsV0PftcQvBCCYuhKbZV9s5hjt9qn8CE86A5g5KqDf83Fxqm/ vXKgHNFHE5zgXGZnrmaf6resQzbvJHO0Fb0CcIohzrpPaL3YepcLDoCCgElGMGQjdCcSQ+Ci FCRl0Bvyj1YZUql+ZkptgGjikQARAQABiQIfBBgBAgAJBQJUY85qAhsMAAoJEGg1lTBwyZKw l4IQAIKHs/9po4spZDFyfDjunimEhVHqlUt7ggR1Hsl/tkvTSze8pI1P6dGp2XW6AnH1iayn yRcoyT0ZJ+Zmm4xAH1zqKjWplzqdb/dO28qk0bPso8+1oPO8oDhLm1+tY+cOvufXkBTm+whm +AyNTjaCRt6aSMnA/QHVGSJ8grrTJCoACVNhnXg/R0g90g8iV8Q+IBZyDkG0tBThaDdw1B2l asInUTeb9EiVfL/Zjdg5VWiF9LL7iS+9hTeVdR09vThQ/DhVbCNxVk+DtyBHsjOKifrVsYep WpRGBIAu3bK8eXtyvrw1igWTNs2wazJ71+0z2jMzbclKAyRHKU9JdN6Hkkgr2nPb561yjcB8 sIq1pFXKyO+nKy6SZYxOvHxCcjk2fkw6UmPU6/j/nQlj2lfOAgNVKuDLothIxzi8pndB8Jju KktE5HJqUUMXePkAYIxEQ0mMc8Po7tuXdejgPMwgP7x65xtfEqI0RuzbUioFltsp1jUaRwQZ MTsCeQDdjpgHsj+P2ZDeEKCbma4m6Ez/YWs4+zDm1X8uZDkZcfQlD9NldbKDJEXLIjYWo1PH hYepSffIWPyvBMBTW2W5FRjJ4vLRrJSUoEfJuPQ3vW9Y73foyo/qFoURHO48AinGPZ7PC7TF vUaNOTjKedrqHkaOcqB185ahG2had0xnFsDPlx5y Message-ID: Date: Wed, 13 Feb 2019 07:51:12 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit 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 2/12/19 7:31 PM, Dan Williams wrote: > Thanks, yes, fscrypt needs a closer look. As far I can see at a quick > glance fscrypt has the same physical block inputs for the encryption > algorithm as MKTME so it seems it could be crafted as a drop in > accelerator for fscrypt for pmem block devices. One bummer is that we have the platform tweak offsets to worry about. As far as I know, those are opaque to software and practically prevent us from replicating the MKTME hardware's encryption/decryption in software. Unless we can get around that, I think it rules out being a drop-in replacement for any software-driven encryption.