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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 E5400C43387 for ; Wed, 9 Jan 2019 12:09:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BC3AE206BB for ; Wed, 9 Jan 2019 12:09:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730568AbfAIMJi (ORCPT ); Wed, 9 Jan 2019 07:09:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59328 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730403AbfAIMJh (ORCPT ); Wed, 9 Jan 2019 07:09:37 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7606389AD7; Wed, 9 Jan 2019 12:09:37 +0000 (UTC) Received: from vitty.brq.redhat.com.redhat.com (unknown [10.40.205.59]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 342305D76A; Wed, 9 Jan 2019 12:09:33 +0000 (UTC) From: Vitaly Kuznetsov To: Borislav Petkov , Reinette Chatre Cc: Babu Moger , x86@kernel.org, linux-kernel@vger.kernel.org, Fenghua Yu , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , =?utf-8?Q?Jan_H=2E_Sch=C3=B6nherr?= , David Duncan Subject: Re: [PATCH] x86/intel_rdt: use rdmsr_safe() to workaround AWS host issue In-Reply-To: <20190109113915.GB15665@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> Date: Wed, 09 Jan 2019 13:09:31 +0100 Message-ID: <87bm4qoww4.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Wed, 09 Jan 2019 12:09:37 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Borislav Petkov writes: > So, assuming RDT is not going to be supported in a guest Hm, why is that? In theory, hypervisors can pass through or emulate the required MSRs... -- Vitaly