Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp713874imu; Wed, 9 Jan 2019 05:16:59 -0800 (PST) X-Google-Smtp-Source: ALg8bN6YfEozxzlMfPmB6P0PmZCP8shbfipm1P5I+N+ugvXYhvKOoeODLgnwjOdmhaw3q9SGM5Cj X-Received: by 2002:a17:902:7d82:: with SMTP id a2mr6007916plm.163.1547039819702; Wed, 09 Jan 2019 05:16:59 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1547039819; cv=none; d=google.com; s=arc-20160816; b=wAgo475B6N5TESvIN+Xu4kdUKfH7L4upH9hveDNtoT/8p2eW5exmnF6XDkxIJK4Hbl uAbV41im8Pbe9JPdbyXWKtg0c/1SOS20Cr8+O6MdsXwIM0XodrbtYaWbqbm1lbF30fXP /uVznOMNurLyq0vs62yajGiZUkgd9UoEP3Qkk1uIe/k2hDggFDLPJgzE4sRY3qp0+6G1 btWJMlKtNeFLdV8/HKcxPzJuE9BzI/T21MPwpLg3XwA9zhuOxhyx0qS4qnznFy5nBRTg DHL0LQ+qsZ7rX9uLbzT5aIWtpOy1jVGwpG2CvBiz5TRkx+vprfbvwYw8VZPZqlE9wE7n pEfg== 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:dkim-signature; bh=NCylCB+Zci1N3EZZ2Gu5Vhpnbf+/VuasVuh9mkjJNMA=; b=SMusvHV7CM8+ojwpwVz3mmPO7z76lSgIqDIh5YsDqRjetDfvyxmyOwFPrsWSi5OPh3 uBmqsWl3nPZmcdCFNf1urf6UL/BjHHzGoLfkSGsm1etin4pEaOs4ec7JnbL4nOLLkwwD Ul4vnsJ5C1y1PaBcOoFqS+yTLw0K5xmw2LfhnHDJT8k0ButNHXISN/QAfhYkkXp7q76F 8bbYasDSXLdHW/FOTv1IIUX2sOfAj8Op//Jurol3S4SoWGERXFck9ejN9gLkqq8EwHJL pEKKQ4VoEPTgccXW7pmWSOzlva1OUFMtVNQGhlHEfJvs5UYhMESHzsPyyca2HKlvctt/ iLQQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=OfTCfQOl; 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=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 3si6422974plx.33.2019.01.09.05.16.43; Wed, 09 Jan 2019 05:16:59 -0800 (PST) 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; dkim=pass header.i=@alien8.de header.s=dkim header.b=OfTCfQOl; 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=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730746AbfAIMOz (ORCPT + 99 others); Wed, 9 Jan 2019 07:14:55 -0500 Received: from mail.skyhub.de ([5.9.137.197]:38328 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730734AbfAIMOy (ORCPT ); Wed, 9 Jan 2019 07:14:54 -0500 Received: from zn.tnic (p200300EC2BEA1000E56F05EB9FFDE1E7.dip0.t-ipconnect.de [IPv6:2003:ec:2bea:1000:e56f:5eb:9ffd:e1e7]) (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 80E501EC072C; Wed, 9 Jan 2019 13:14:53 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1547036093; 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=NCylCB+Zci1N3EZZ2Gu5Vhpnbf+/VuasVuh9mkjJNMA=; b=OfTCfQOl0ssH7VNtaZ+n1zTtFTQ3Feyw9joyGYL/xyria1ecQn2FGRDa+v8FmeMNKJHldF Vf1+TmnOQoTnJEwlvb4bBLy3yPHMUJeKQMsJcoRkLcWKp4m/NecqNHcUva+fmkPruJxDOX rx/1wrIQBw7PDVFx5cb/2qlasHwNYCY= Date: Wed, 9 Jan 2019 13:14:45 +0100 From: Borislav Petkov To: Vitaly Kuznetsov Cc: Reinette Chatre , Babu Moger , x86@kernel.org, linux-kernel@vger.kernel.org, Fenghua Yu , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Jan =?utf-8?Q?H=2E_Sch=C3=B6nherr?= , David Duncan Subject: Re: [PATCH] x86/intel_rdt: use rdmsr_safe() to workaround AWS host issue Message-ID: <20190109121445.GC15665@zn.tnic> References: <20181220134046.7916-1-vkuznets@redhat.com> <20181220161722.GD31403@zn.tnic> <51dcb13a-4751-47f5-1e01-f6731a2c6f3c@intel.com> <20521afe-09af-7acf-6f32-3f6e9a971091@intel.com> <20190109113915.GB15665@zn.tnic> <87bm4qoww4.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <87bm4qoww4.fsf@vitty.brq.redhat.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 Wed, Jan 09, 2019 at 01:09:31PM +0100, Vitaly Kuznetsov wrote: > Hm, why is that? In theory, hypervisors can pass through or emulate the > required MSRs... ...and when the theory becomes reality we'll remove the check. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.