Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757464AbdIIOny (ORCPT ); Sat, 9 Sep 2017 10:43:54 -0400 Received: from ud10.udmedia.de ([194.117.254.50]:59780 "EHLO mail.ud10.udmedia.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753519AbdIIOnw (ORCPT ); Sat, 9 Sep 2017 10:43:52 -0400 Date: Sat, 9 Sep 2017 16:43:50 +0200 From: Markus Trippelsdorf To: Borislav Petkov Cc: Andy Lutomirski , Ingo Molnar , Thomas Gleixner , Peter Zijlstra , LKML , Ingo Molnar , Tom Lendacky Subject: Re: Current mainline git (24e700e291d52bd2) hangs when building e.g. perf Message-ID: <20170909144350.GA290@x4> References: <20170908215656.qw66lgfsfgpoqrdm@pd.tnic> <20170909063908.GA277@x4> <20170909101810.a757cja7vslofyrj@pd.tnic> <20170909110749.GA277@x4> <20170909130727.3jjnc6p5g45dihmy@pd.tnic> <20170909133745.GA289@x4> <20170909133954.GB289@x4> <20170909140700.bp7jonmp7etlb7ov@pd.tnic> <20170909142014.GC289@x4> <20170909143335.ja2iwjsbeyfxz4ez@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170909143335.ja2iwjsbeyfxz4ez@pd.tnic> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 798 Lines: 32 On 2017.09.09 at 16:33 +0200, Borislav Petkov wrote: > On Sat, Sep 09, 2017 at 04:20:14PM +0200, Markus Trippelsdorf wrote: > > > # rdmsr -a 0x00000410 > > > > 3fffffff > > 0 > > 0 > > 0 > > WTF?! Those should be equal on every CPU. Yikes, we need to pay > attention to those... Grrr. > > # wrmsr -a 0x00000410 0x3ffffbff > > should fix your issue. No, it doesn't work: x4 ~ # rdmsr -a 0x00000410 3fffffff 0 0 0 x4 ~ # wrmsr -a 0x00000410 0x3ffffbff x4 ~ # rdmsr -a 0x00000410 3ffffbff 0 0 0 -- Markus