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=-7.8 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 E3D34C43216 for ; Thu, 19 Aug 2021 19:57:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CCA2E61100 for ; Thu, 19 Aug 2021 19:57:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234903AbhHST6a (ORCPT ); Thu, 19 Aug 2021 15:58:30 -0400 Received: from mga14.intel.com ([192.55.52.115]:65242 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233995AbhHST62 (ORCPT ); Thu, 19 Aug 2021 15:58:28 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10081"; a="216366474" X-IronPort-AV: E=Sophos;i="5.84,335,1620716400"; d="scan'208";a="216366474" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Aug 2021 12:57:52 -0700 X-IronPort-AV: E=Sophos;i="5.84,335,1620716400"; d="scan'208";a="532641597" Received: from kfrangia-mobl1.amr.corp.intel.com (HELO skuppusw-mobl5.amr.corp.intel.com) ([10.212.58.216]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Aug 2021 12:57:50 -0700 Subject: Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() To: Tom Lendacky , Christoph Hellwig Cc: linux-kernel@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, iommu@lists.linux-foundation.org, kvm@vger.kernel.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-graphics-maintainer@vmware.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, kexec@lists.infradead.org, linux-fsdevel@vger.kernel.org, Borislav Petkov , Brijesh Singh , Joerg Roedel , Andi Kleen , Tianyu Lan , Thomas Gleixner , Ingo Molnar , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Joerg Roedel References: <7d55bac0cf2e73f53816bce3a3097877ed9663f3.1628873970.git.thomas.lendacky@amd.com> <4272eaf5-b654-2669-62ac-ba768acd6b91@amd.com> From: "Kuppuswamy, Sathyanarayanan" Message-ID: <90316f17-e853-fd23-2ec2-4d03cf283b0b@linux.intel.com> Date: Thu, 19 Aug 2021 12:57:48 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <4272eaf5-b654-2669-62ac-ba768acd6b91@amd.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org On 8/19/21 11:33 AM, Tom Lendacky wrote: > There was some talk about this on the mailing list where TDX and SEV may > need to be differentiated, so we wanted to reserve a range of values per > technology. I guess I can remove them until they are actually needed. In TDX also we have similar requirements and we need some flags for TDX specific checks. So I think it is fine to leave some space for vendor flags. -- Sathyanarayanan Kuppuswamy Linux Kernel Developer