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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 D76A2C433ED for ; Thu, 13 May 2021 20:07:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AEEC86143C for ; Thu, 13 May 2021 20:07:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232419AbhEMUIw (ORCPT ); Thu, 13 May 2021 16:08:52 -0400 Received: from mga12.intel.com ([192.55.52.136]:46772 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232387AbhEMUIt (ORCPT ); Thu, 13 May 2021 16:08:49 -0400 IronPort-SDR: Se1ATL+zaBT2JdNP5vLqqb8xaE06bFrjv/SJiyifn0hfNgIagz0mGN8QQBVGLfePc4gpuHHRP8 rb15l9kyIR4g== X-IronPort-AV: E=McAfee;i="6200,9189,9983"; a="179636810" X-IronPort-AV: E=Sophos;i="5.82,296,1613462400"; d="scan'208";a="179636810" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 May 2021 13:07:39 -0700 IronPort-SDR: Sqg+C3NSDelLsy/5XX5jk6hIWJtHxCX2cnF3mTdiLsiG+UO7Dq4o1n25Gy4t2mCifosGvuahCq qJagnWfYNYLA== X-IronPort-AV: E=Sophos;i="5.82,296,1613462400"; d="scan'208";a="456784066" Received: from rgandiko-mobl.amr.corp.intel.com (HELO [10.212.226.208]) ([10.212.226.208]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 May 2021 13:07:38 -0700 Subject: Re: [RFC v2 08/32] x86/traps: Add #VE support for TDX guest To: Andi Kleen , Kuppuswamy Sathyanarayanan , Peter Zijlstra , Andy Lutomirski , Dan Williams , Tony Luck Cc: Kirill Shutemov , Kuppuswamy Sathyanarayanan , Raj Ashok , Sean Christopherson , linux-kernel@vger.kernel.org, Sean Christopherson References: <8a1d6930f784cb57c957cf20cea870947db91e05.1619458733.git.sathyanarayanan.kuppuswamy@linux.intel.com> <73752227-6eaf-2de6-3ac6-5ee280980c18@linux.intel.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <73752227-6eaf-2de6-3ac6-5ee280980c18@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/13/21 12:47 PM, Andi Kleen wrote: > "if there is any reason for it to nest the TD would shut down." The TDX EAS says: > If, when attempting to inject a #VE, the Intel TDX module discovers > that the guest TD has not yet retrieved the information for a > previous #VE (i.e., VE_INFO.VALID is not 0), the TDX module injects a > #DF into the guest TD to indicate a #VE overrun. How does that result in a shut down?