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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 113A2C433EF for ; Mon, 11 Oct 2021 18:19:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5DAF60F11 for ; Mon, 11 Oct 2021 18:19:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234340AbhJKSV5 (ORCPT ); Mon, 11 Oct 2021 14:21:57 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:34017 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229565AbhJKSVz (ORCPT ); Mon, 11 Oct 2021 14:21:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633976395; h=from:from: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; bh=MttXTOG7P9ZAA72SX78ClayBg0KZinyulsAec13x76M=; b=FWtGK2MxJETeGxMtNcaDhMNNVDSkPVM7zvfgqMczops2/NkDkraV9CqG/JmgXXW4XDvEUO yXvZZYqRGYJ0wEp16p2bMuLNinkfXRyZaRb54Irx30yaubZx0EMQOisHixCUOkLXrQp0BM yvGTucSD9dMwZFcR8kmHH0/1YWTuuBY= Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-224-4R9t9CPOP6q4SILtDpPn4A-1; Mon, 11 Oct 2021 14:19:53 -0400 X-MC-Unique: 4R9t9CPOP6q4SILtDpPn4A-1 Received: by mail-qt1-f199.google.com with SMTP id l14-20020ac8458e000000b002a7829805b8so3633750qtn.22 for ; Mon, 11 Oct 2021 11:19:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=MttXTOG7P9ZAA72SX78ClayBg0KZinyulsAec13x76M=; b=ssD84gwfSjS3NRcl0PgjhAQ3EY1Ish4JoMGGQPZCcqzbazBVA5aopinEoKv3vHHRGe 2FlN+GYlJb4TQjjPFy55XH869ePZ6+Lp0CT8TbvHkrOcdFmyYkbpzPeJkF5rRcdh2H9h Pv8dTnG4KvKZoLoKXcNnY1Tk+i/8oESD4CxKunx0FVr7H4CJyLzD8F0g5dZkVj4m+0KM nGohd6e44XHdG4XXU/bw8VjKazKwOu6gGFQJq9djKAYBfJJSjSHlglR6HwB6xUl+kTqB l4LvwQbQVxv6GnEyiFU5mz6d3T5OXxf7tPdTu0ml7pR8nmzJImAMdG9/iqtECUdJ9qU5 6NBQ== X-Gm-Message-State: AOAM531uD9JcsPDC+eN553Pnl9hQpbd64K2WBssvmcBOtGCHaMHn8W6D +v62JuoWgIBe+apEdCDMzcx/03YEd/qx3arp9D6pRD8wcQV+PZ5AdcL0EloEa6O7010yGM0EKsD DJj60kQ1sFg662WL1xxwHkFy1 X-Received: by 2002:ac8:5bce:: with SMTP id b14mr10836178qtb.194.1633976393440; Mon, 11 Oct 2021 11:19:53 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwFVX5robRCsYjhCO4rpkDWlzo+DOZDVwzw/04TSEW8Kouze7DjppfYr32XtldSWHVr6RTt3g== X-Received: by 2002:ac8:5bce:: with SMTP id b14mr10836140qtb.194.1633976393271; Mon, 11 Oct 2021 11:19:53 -0700 (PDT) Received: from treble ([2600:1700:6e32:6c00::15]) by smtp.gmail.com with ESMTPSA id u19sm5292644qtx.40.2021.10.11.11.19.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Oct 2021 11:19:52 -0700 (PDT) Date: Mon, 11 Oct 2021 11:19:48 -0700 From: Josh Poimboeuf To: Kuppuswamy Sathyanarayanan Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Paolo Bonzini , David Hildenbrand , Andrea Arcangeli , Juergen Gross , Deep Shah , VMware Inc , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Peter H Anvin , Dave Hansen , Tony Luck , Dan Williams , Andi Kleen , Kirill Shutemov , Sean Christopherson , Kuppuswamy Sathyanarayanan , linux-kernel@vger.kernel.org Subject: Re: [PATCH v10 02/11] x86/tdx: Introduce INTEL_TDX_GUEST config option Message-ID: <20211011181948.fkt7o2fezmuyynze@treble> References: <20211009053747.1694419-1-sathyanarayanan.kuppuswamy@linux.intel.com> <20211009053747.1694419-3-sathyanarayanan.kuppuswamy@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20211009053747.1694419-3-sathyanarayanan.kuppuswamy@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 08, 2021 at 10:37:38PM -0700, Kuppuswamy Sathyanarayanan wrote: > +config INTEL_TDX_GUEST > + bool "Intel Trusted Domain Extensions (TDX) Guest Support" > + depends on X86_64 && CPU_SUP_INTEL && PARAVIRT > + depends on SECURITY > + depends on X86_X2APIC > + help > + Provide support for running in a trusted domain on Intel processors > + equipped with Trusted Domain Extensions. TDX is a Intel 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. TDX guest > + uses virtual X2APIC for interrupt management. Why does it depend on SECURITY? It should at least be explained in the commit message. -- Josh