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=-0.8 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 7398DC43144 for ; Sat, 23 Jun 2018 10:57:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0B4E824B81 for ; Sat, 23 Jun 2018 10:57:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0B4E824B81 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lichtvoll.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751769AbeFWK5W (ORCPT ); Sat, 23 Jun 2018 06:57:22 -0400 Received: from mondschein.lichtvoll.de ([194.150.191.11]:55311 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751490AbeFWK5V (ORCPT ); Sat, 23 Jun 2018 06:57:21 -0400 Authentication-Results: auth=pass smtp.auth=martin smtp.mailfrom=martin@lichtvoll.de Received: from 127.0.0.1 (localhost [127.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.lichtvoll.de (Postfix) with ESMTPSA id C679234C95D; Sat, 23 Jun 2018 12:57:18 +0200 (CEST) From: Martin Steigerwald To: LKML Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org Subject: Linux on Intel x86: How to disable Hyperthreading Date: Sat, 23 Jun 2018 12:57:18 +0200 Message-ID: <1554914.aCy3vs9hif@merkaba> MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="iso-8859-1" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Q2O0ZCBwZW9wbGUgZm9yIFg4NiBhcmNoaXRlY3R1cmUgaW4gTUFJTlRBSU5FUlMuCgoKSGkhCgpB Y2NvcmRpbmcgdG8KCmh0dHBzOi8vd3d3Lmt1a2V0ei1ibG9nLmRlL3RsYmxlZWQtbmV1ZS1zaWNo ZXJoZWl0c2x1ZWNrZW4tYmVpLWludGVsLWNwdXMvCgppbgoKaHR0cHM6Ly93d3cuYmxhY2toYXQu Y29tL3VzLTE4L2JyaWVmaW5ncy9zY2hlZHVsZS8jdGxibGVlZC13aGVuLXByb3RlY3RpbmcteW91 ci1jcHUtY2FjaGVzLWlzLW5vdC1lbm91Z2gtMTAxNDkKCihGaXJlZm94IGFuZCBDaHJvbWl1bSB3 aXRoIGN1cnJlbnQgc2V0dGluZ3MgYW5kIGFkZC1vbnMgd2ViYnJvd3NlcnMgZG8gCm5vdCBkaXNw bGF5IHRoZSBjb250ZW50cyBvZiB0aGUgcGFnZSkKCm9uZSBjYW4gcmVhZDoKCj4gT3VyIFRMQmxl ZWQgZXhwbG9pdCBzdWNjZXNzZnVsbHkgbGVha3MgYSAyNTYtYml0IEVkRFNBIGtleSBmcm9tCj4g bGliZ2NyeXB0ICh1c2VkIGluIGUuZy4gR1BHKSB3aXRoIGEgOTglIHN1Y2Nlc3MgcmF0ZSBhZnRl ciBqdXN0IGEKPiBzaW5nbGUgb2JzZXJ2YXRpb24gb2Ygc2lnbmluZyBvcGVyYXRpb24gb24gYSBj by1yZXNpZGVudCBoeXBlcnRocmVhZAo+IGFuZCBqdXN0IDE3IHNlY29uZHMgb2YgYW5hbHlzaXMg dGltZS4ACgoKQW5kIHRoaXMgcHJvYmFibHkgd291bGQgZXhwbGFpbiB0aGUgZGlzYWJsaW5nIG9m IGl0IGluIE9wZW5CU0QuCgpXaGF0IGlzIHlvdXIgdGFrZSBvbiB0aGlzPwoKCkFsc28gaG93IHdv dWxkIHlvdSBkaXNhYmxlIGl0IGluIGNhc2UgeW91IHdvdWxkPwoKSSBjdXJyZW50bHkgdGVzdCBy dW4gd2l0aCB0aGUgc2NyaXB0IEkgZm91bmQgb246CgpodHRwczovL3NlcnZlcmZhdWx0LmNvbS9x dWVzdGlvbnMvMjM1ODI1L2Rpc2FibGUtaHlwZXJ0aHJlYWRpbmctZnJvbS13aXRoaW4tbGludXgt bm8tYWNjZXNzLXRvLWJpb3MKCkp1c3QgdG8gc2VlIHdoZXRoZXIgSSBub3RpY2UgYSBzaWduaWZp Y2FudCBwZXJmb3JtYW5jZSBkcm9wLgoKVGhhbmtzLgotLSAKTWFydGlu