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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT 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 BD802C282C4 for ; Mon, 4 Feb 2019 19:57:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 83D432176F for ; Mon, 4 Feb 2019 19:57:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="D9W6/xAo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727133AbfBDT5P (ORCPT ); Mon, 4 Feb 2019 14:57:15 -0500 Received: from mail.skyhub.de ([5.9.137.197]:57276 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726261AbfBDT5P (ORCPT ); Mon, 4 Feb 2019 14:57:15 -0500 Received: from zn.tnic (p200300EC2BC6E200742B98B19C68EA29.dip0.t-ipconnect.de [IPv6:2003:ec:2bc6:e200:742b:98b1:9c68:ea29]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 54A1C1EC02AE; Mon, 4 Feb 2019 20:57:14 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1549310234; 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:in-reply-to:in-reply-to: references:references; bh=FYSKR67UlcPrEiGoLLlKKWMeT7JsHFcevfWwYbegnPg=; b=D9W6/xAoY/oeEfqi7QRCQjoNMCa7QwnzzZWUO09YK2lX2B7GnZNlBMD1CYbMnPnlfrbphM WxWovBjcS694kf8pWdzNa0jMVgdncPiuig2yD38vHkx3SF5YK3CHW8TOhq87yr6kGaYpTM 8FZ6qW4JxnBaz/dZY+KsRCP0DTSEUvk= Date: Mon, 4 Feb 2019 20:57:04 +0100 From: Borislav Petkov To: Dave Hansen Cc: Thomas Gleixner , Fenghua Yu , Ingo Molnar , H Peter Anvin , Ashok Raj , Peter Zijlstra , Michael Chan , Ravi V Shankar , Ricardo Neri , linux-kernel , x86 Subject: Re: [PATCH v3 08/10] x86/setcpuid: Add kernel option setcpuid Message-ID: <20190204195704.GJ29639@zn.tnic> References: <1549084491-57808-1-git-send-email-fenghua.yu@intel.com> <1549084491-57808-9-git-send-email-fenghua.yu@intel.com> <9fa7406b-113f-fe0a-9fc7-ef00b3a6b620@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <9fa7406b-113f-fe0a-9fc7-ef00b3a6b620@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 04, 2019 at 11:05:52AM -0800, Dave Hansen wrote: > But, we're not being very persuasive because we kinda forgot about the > "if and only if" condition that you mentioned. But why does it have to be a cmdline parameter instead of being an automatic thing which sets the proper bits in arch/x86/kernel/cpu/intel.c based on f/m/s or MSR or whatever ? -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.