Received: by 2002:a25:6193:0:0:0:0:0 with SMTP id v141csp2060363ybb; Thu, 2 Apr 2020 12:17:36 -0700 (PDT) X-Google-Smtp-Source: APiQypLvxnbEYu9tn0bgT/AxTfMktzYjB0vSLEpIXORvdsIjs7u3TlxptOTbUHuLt0wsSWVPp0gd X-Received: by 2002:a9d:7c9a:: with SMTP id q26mr3726537otn.143.1585855056338; Thu, 02 Apr 2020 12:17:36 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1585855056; cv=none; d=google.com; s=arc-20160816; b=0LcczwpXiPeCC5uc7fYzpEwb/Cspn8qr40u+jeTQ4J7rrtbbJZiqwt2iWPin4OlBN5 7w/uz3Okvb99DDnVmw+lHLJVZ45V2ERRwGYhhIneS3d+9110ROVogw1GuEgBpgfAAWhr F+BFBr6BwJcrPL38Oj6rc9AAm/NyfOFeEtrKSPgdDhht8aooLndbANfZWldPNUCz0CG9 CUelZE32EaXZ/wVca8OYm8qw/vFbdbolJiNM8k+AN726dSWA4hazCNfj0PfhUv8W0VBl PRX1eqpSr7m9OM2nUXoegVn0NpFsFGbzEI+kWG56Nd40hEUXO9XVMzBwtFg7KBTS7Txg 0vTA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:ironport-sdr:ironport-sdr; bh=XmNNJpRa1YEdeLxmdLfi8k5Rb3EKAYiPdtLG7VVd4A8=; b=d9xvXGJJUKwShXMDfwF/tUl/ycte7i7Dt/9+Ck58EPzZYUBQb8+QeLtHugbO2BAxzQ qiF0d36EWRrnnHK0WkWsUEZp2OHwg4hwLehMGCjFHy++IOxjpgjixN7+HLr0mp24NZ8C iUpJC22KjvbDWijpayuF2Rr21M0is3f2loGDRAbuYoUEV3eZfxmH6MsHuAYoO2uogfRm GdFlmv2oxkAiUnsO9wkEtaDeP6CspDtUOxys1KJXMcTprO0ldXM+R1VO+Xi1EwmqoREf DCELxAsqD6Xg3tAAZIBgjQqNW+13fGEa7l7a5wDtnTGcQGaHCyGSHaJpM2xaaGkMQm3E LimQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 94si2526866oti.94.2020.04.02.12.17.14; Thu, 02 Apr 2020 12:17:36 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388623AbgDBRv3 (ORCPT + 99 others); Thu, 2 Apr 2020 13:51:29 -0400 Received: from mga02.intel.com ([134.134.136.20]:58673 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726617AbgDBRv3 (ORCPT ); Thu, 2 Apr 2020 13:51:29 -0400 IronPort-SDR: 024XrLFU2c7RJJYOyOnQCulgqClDopoCGwJNwkk+nftJl3cOBY5dHT/iNAzklsJO6VLVOTCQD3 uVcO1lASeTaA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Apr 2020 10:51:28 -0700 IronPort-SDR: yNgpYBPuKehyV8NhgxZG31O/WMbdD7zDN+BaLjgXKSi3WVf8xnEcQNqs47hd2hQieWoPzjAYWI CWeJWpazWz5Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,336,1580803200"; d="scan'208";a="295718629" Received: from sjchrist-coffee.jf.intel.com (HELO linux.intel.com) ([10.54.74.202]) by FMSMGA003.fm.intel.com with ESMTP; 02 Apr 2020 10:51:28 -0700 Date: Thu, 2 Apr 2020 10:51:28 -0700 From: Sean Christopherson To: Thomas Gleixner Cc: Xiaoyao Li , Peter Zijlstra , LKML , x86@kernel.org, "Kenneth R. Crudup" , Paolo Bonzini , Jessica Yu , Fenghua Yu , Nadav Amit , Thomas Hellstrom , Tony Luck , Steven Rostedt Subject: Re: [patch v2 1/2] x86,module: Detect VMX modules and disable Split-Lock-Detect Message-ID: <20200402175127.GJ13879@linux.intel.com> References: <20200402123258.895628824@linutronix.de> <20200402124205.242674296@linutronix.de> <20200402152340.GL20713@hirez.programming.kicks-ass.net> <725ca48f-8194-658e-0296-65d4368803b5@intel.com> <20200402162548.GH20730@hirez.programming.kicks-ass.net> <2d2140c4-712a-2f8d-cde7-b3e64c28b204@intel.com> <87pncpn650.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87pncpn650.fsf@nanos.tec.linutronix.de> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 02, 2020 at 07:34:35PM +0200, Thomas Gleixner wrote: > Aside of that I'm still against the attempt of proliferating crap, > i.e. disabling it because the host is triggering it and then exposing it > to guests. The above does not change my mind in any way. This proposal > is still wrong. Eh, I still think the "off in host, on in guest" is a legit scenario for debug/development/testing, but I agree that the added complexity doesn't justify the minimal benefits versus sld_warn.