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=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,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 89D36C433ED for ; Tue, 18 May 2021 20:19:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6678161376 for ; Tue, 18 May 2021 20:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239515AbhERUVM (ORCPT ); Tue, 18 May 2021 16:21:12 -0400 Received: from mga05.intel.com ([192.55.52.43]:62701 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238378AbhERUVJ (ORCPT ); Tue, 18 May 2021 16:21:09 -0400 IronPort-SDR: Y4AQl4/ZTswj5Tr9zI87VQia8Cux7KADrB8flfINN+4dxXnVnYZGXByx0kFrcyq9CaYZps0B0v Q07inwc2Eeeg== X-IronPort-AV: E=McAfee;i="6200,9189,9988"; a="286342178" X-IronPort-AV: E=Sophos;i="5.82,310,1613462400"; d="scan'208";a="286342178" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2021 13:19:49 -0700 IronPort-SDR: IM0bwbnVAubC/BfiHSX9ZuiFbGcCiE8VmUIhh6pXj0nnDezW+n7Bjtnv2TgsI5lSsacZllLjiq ZZV60/h+Cr/g== X-IronPort-AV: E=Sophos;i="5.82,310,1613462400"; d="scan'208";a="542112693" Received: from craigsmi-mobl.amr.corp.intel.com (HELO [10.212.132.228]) ([10.212.132.228]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2021 13:19:48 -0700 Subject: Re: [RFC v2-fix 1/1] x86/tdx: Wire up KVM hypercalls To: "Kuppuswamy, Sathyanarayanan" , Peter Zijlstra , Andy Lutomirski Cc: Tony Luck , Andi Kleen , Kirill Shutemov , Kuppuswamy Sathyanarayanan , Dan Williams , Raj Ashok , Sean Christopherson , linux-kernel@vger.kernel.org, Isaku Yamahata References: <2a4e9702-5407-aa95-be9b-864775bbaabd@intel.com> <20210518001551.258126-1-sathyanarayanan.kuppuswamy@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: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/18/21 1:12 PM, Kuppuswamy, Sathyanarayanan wrote: >>> [Isaku: proposed KVM VENDOR string] >>> Signed-off-by: Kirill A. Shutemov >>> Signed-off-by: Isaku Yamahata >>> Reviewed-by: Andi Kleen >>> Signed-off-by: Kuppuswamy Sathyanarayanan >>> >> >> This SoB chain is odd.  Kirill wrote this, sent it to Isaku, who sent it >> to Sathya? > > Initially we have used "0" as vendor ID for KVM. But Isaku proposed a new > value for it and sent a patch to fix it. But, I did not want to carry it as > separate patch (for one line change). So I have merged his change with > this patch, and added his signed-off with comment ([Isaku: proposed KVM > VENDOR string]) > > +#define TDVMCALL_VENDOR_KVM            0x4d564b2e584454 /* "TDX.KVM" */ That's a combined Co-developed-by+Signed-off-by situation. You don't add a bare SoB for that. But, seriously, you don't need to preserve a SoB for a one-line patch. Just pull the line in and make a note in the changelog.