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 6C350C7EE25 for ; Wed, 7 Jun 2023 14:16:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D45BC8E0002; Wed, 7 Jun 2023 10:16:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CF5BA8E0001; Wed, 7 Jun 2023 10:16:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BBCC28E0002; Wed, 7 Jun 2023 10:16:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id A98F18E0001 for ; Wed, 7 Jun 2023 10:16:03 -0400 (EDT) Received: from smtpin23.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 5A1B9AEB83 for ; Wed, 7 Jun 2023 14:16:03 +0000 (UTC) X-FDA: 80876151006.23.58D96F6 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by imf08.hostedemail.com (Postfix) with ESMTP id AAAC116001E for ; Wed, 7 Jun 2023 14:15:59 +0000 (UTC) Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=m24zqawE; spf=pass (imf08.hostedemail.com: domain of dave.hansen@intel.com designates 192.55.52.120 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1686147360; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=260b7i+MTNu0YLxTmzjLFhNtomFyIftfbG7teufVYQo=; b=MbZSMRkRJT1H0zfJJsK/shG3rY2JWqb5Jq0eLq6ckYZmzBMN8XdF2oJ10Im9MhdVHNB5NY 4gdvekBxVN8+0lupHvyrZydv47B65Hri4sptVlgdJKH8Sdt79eE/NNpySveNPaYj6pfLCu /Hor898b1KA5eU14X+rEQHnLiQXkaIM= ARC-Authentication-Results: i=1; imf08.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=m24zqawE; spf=pass (imf08.hostedemail.com: domain of dave.hansen@intel.com designates 192.55.52.120 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1686147360; a=rsa-sha256; cv=none; b=c7+IE8ZOF8Waci/5zbfh/IvJXV8428IAM+4kLmPLq/9+RDo5Odjz5jJKYHCo3ZmWFDY4Gy KIpKR5mAGgiakLzXHHR1fq5TIbHbzIQ0XU85aStohkvYMheHS3d71DBclYrRFBGKDOyeRE b9g3yzrYezu8v33e7aM1hy2THJ6FHOU= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686147359; x=1717683359; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=iQiCIoJzhIO4mN9Mh3ygJf9p/9Yr66SOAT+qlykhdT8=; b=m24zqawEn8UDZwF8H6iGabEDagyBYyi0PQOipqm7bKyTeaZF7zewEgwN mGicuIs+HmwQ7/ZAYzCTkVvpVuWGxJadf6WZ53MJNDUKP62Nn1XJ+VT7Q X5WQH0EUn6ZnTJfcJWSWcnn4q7pRT3SWTkxGBYIQk+LhlMNhdffKYiWC+ TvFe4tVFs9rhrmlrhrKKh6lUAjjS3YNtinbYfnl/mj4g5Z2Nd3hsIc+rY Y882Qi/BM//4bQ35yVR+GX+8Q0sW1eoyLDo54HJ+9h/7crlZvAu5S4n/k mMr0QX+J4B6JVaxOrF9Y6aZJy4y772b2ee1UX5M5V2ESxt+CHjfJ0PDzB A==; X-IronPort-AV: E=McAfee;i="6600,9927,10734"; a="355851826" X-IronPort-AV: E=Sophos;i="6.00,224,1681196400"; d="scan'208";a="355851826" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2023 07:15:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10734"; a="822171650" X-IronPort-AV: E=Sophos;i="6.00,224,1681196400"; d="scan'208";a="822171650" Received: from vsmyers-mobl2.amr.corp.intel.com (HELO [10.212.146.233]) ([10.212.146.233]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2023 07:15:55 -0700 Message-ID: Date: Wed, 7 Jun 2023 07:15:54 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH v11 04/20] x86/cpu: Detect TDX partial write machine check erratum Content-Language: en-US To: Kai Huang , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: linux-mm@kvack.org, kirill.shutemov@linux.intel.com, tony.luck@intel.com, peterz@infradead.org, tglx@linutronix.de, seanjc@google.com, pbonzini@redhat.com, david@redhat.com, dan.j.williams@intel.com, rafael.j.wysocki@intel.com, ying.huang@intel.com, reinette.chatre@intel.com, len.brown@intel.com, ak@linux.intel.com, isaku.yamahata@intel.com, chao.gao@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, bagasdotme@gmail.com, sagis@google.com, imammedo@redhat.com References: <86f2a8814240f4bbe850f6a09fc9d0b934979d1b.1685887183.git.kai.huang@intel.com> From: Dave Hansen In-Reply-To: <86f2a8814240f4bbe850f6a09fc9d0b934979d1b.1685887183.git.kai.huang@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: AAAC116001E X-Rspam-User: X-Stat-Signature: ifrid64gqb5zeqnu8ncxr5uzsmpxshpf X-Rspamd-Server: rspam01 X-HE-Tag: 1686147359-671997 X-HE-Meta: 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 FdHbaauM SDWcuYGv/WM3Ft4ygSPToM7xSQUTodLKW/4RGr2MDMm3oKB+i+koTxbJnkgB8f300iCAWblOwnrlbJHPgf6CWzf/1gjUG7ILstm7zqnDKQ7HSXnZaZTRYxr5DYnZod/aU0PzZG4YSc9cGmhutID+WuawO0WLJd97fBno0Q34cpJyK8T0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000252, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 6/4/23 07:27, Kai Huang wrote: > TDX memory has integrity and confidentiality protections. Violations of > this integrity protection are supposed to only affect TDX operations and > are never supposed to affect the host kernel itself. In other words, > the host kernel should never, itself, see machine checks induced by the > TDX integrity hardware. At the risk of patting myself on the back by acking a changelog that I wrote 95% of: Reviewed-by: Dave Hansen