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=-15.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 588E3C433ED for ; Mon, 26 Apr 2021 22:32:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2716D61159 for ; Mon, 26 Apr 2021 22:32:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236016AbhDZWcw (ORCPT ); Mon, 26 Apr 2021 18:32:52 -0400 Received: from mga11.intel.com ([192.55.52.93]:57982 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232116AbhDZWcv (ORCPT ); Mon, 26 Apr 2021 18:32:51 -0400 IronPort-SDR: 4e0lipseylVvNoRRTxkYaOG+ephhRE0fvvgcbdo7LZBJ4EeJWKiFPmiudZqe392Cxq8WrRAIdp 35waHAYtysFQ== X-IronPort-AV: E=McAfee;i="6200,9189,9966"; a="193227683" X-IronPort-AV: E=Sophos;i="5.82,252,1613462400"; d="scan'208";a="193227683" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Apr 2021 15:32:09 -0700 IronPort-SDR: KUuXlNxe3y0xU+C+8+tj7NB5PWyN+o1NpVSHnCnqYFlmRTdBgo30/zbTitFOa+vVdw6LPIbzlI S4eVDWimm0yA== X-IronPort-AV: E=Sophos;i="5.82,252,1613462400"; d="scan'208";a="465272238" Received: from ssumanpx-mobl.amr.corp.intel.com (HELO skuppusw-mobl5.amr.corp.intel.com) ([10.254.34.197]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Apr 2021 15:32:08 -0700 Subject: Re: [RFC v2 02/32] x86/tdx: Introduce INTEL_TDX_GUEST config option To: Randy Dunlap , Peter Zijlstra , Andy Lutomirski , Dave Hansen , Dan Williams , Tony Luck Cc: Andi Kleen , Kirill Shutemov , Kuppuswamy Sathyanarayanan , Raj Ashok , Sean Christopherson , linux-kernel@vger.kernel.org References: <32870c547c6e143a8f42667c6087ee61dc07e90b.1619458733.git.sathyanarayanan.kuppuswamy@linux.intel.com> From: "Kuppuswamy, Sathyanarayanan" Message-ID: Date: Mon, 26 Apr 2021 15:32:07 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/26/21 2:09 PM, Randy Dunlap wrote: > On 4/26/21 11:01 AM, Kuppuswamy Sathyanarayanan wrote: >> Add INTEL_TDX_GUEST config option to selectively compile >> TDX guest support. >> >> Signed-off-by: Kuppuswamy Sathyanarayanan >> Reviewed-by: Andi Kleen >> Reviewed-by: Tony Luck >> --- >> arch/x86/Kconfig | 15 +++++++++++++++ >> 1 file changed, 15 insertions(+) >> >> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig >> index 6b4b682af468..932e6d759ba7 100644 >> --- a/arch/x86/Kconfig >> +++ b/arch/x86/Kconfig >> @@ -875,6 +875,21 @@ config ACRN_GUEST >> IOT with small footprint and real-time features. More details can be >> found in https://projectacrn.org/. >> >> +config INTEL_TDX_GUEST >> + bool "Intel Trusted Domain eXtensions Guest Support" >> + depends on X86_64 && CPU_SUP_INTEL && PARAVIRT >> + depends on SECURITY >> + select PARAVIRT_XL >> + select X86_X2APIC >> + select SECURITY_LOCKDOWN_LSM >> + help >> + Provide support for running in a trusted domain on Intel processors >> + equipped with Trusted Domain eXtenstions. TDX is an new Intel > > a new Intel > Good catch. I will fix it in next version. >> + technology that extends VMX and Memory Encryption with a new kind of >> + virtual machine guest called Trust Domain (TD). A TD is designed to >> + run in a CPU mode that protects the confidentiality of TD memory >> + contents and the TD’s CPU state from other software, including VMM. >> + >> endif #HYPERVISOR_GUEST >> >> source "arch/x86/Kconfig.cpu" >> > > -- Sathyanarayanan Kuppuswamy Linux Kernel Developer