Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759424Ab1EMPEI (ORCPT ); Fri, 13 May 2011 11:04:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:23992 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753445Ab1EMPEH (ORCPT ); Fri, 13 May 2011 11:04:07 -0400 Date: Fri, 13 May 2011 10:59:28 -0400 From: Chuck Ebbert To: Boris Ostrovsky Cc: Hans Rosenfeld , "linux-kernel@vger.kernel.org" , "Petkov, Borislav" Subject: Re: [PATCH] cpu, AMD: Fix another bug in the new errata checking code Message-ID: <20110513105928.6216ddc8@katamari> In-Reply-To: <4DCD2C3F.9070905@amd.com> References: <20110512195938.1728ab52@katamari> <20110513102154.GB9270@escobedo.osrc.amd.com> <4DCD2C3F.9070905@amd.com> Organization: Red Hat, Inc. Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1375 Lines: 35 On Fri, 13 May 2011 09:03:59 -0400 Boris Ostrovsky wrote: > On 05/13/2011 06:21 AM, Hans Rosenfeld wrote: > > On Thu, May 12, 2011 at 07:59:38PM -0400, Chuck Ebbert wrote: > > The revision guide states that family 0x10 model 6 stepping 2 has E400. > > So I would expect that OSVW length is>= 2 and that OSVW status has bit > > 1 set, or that OSVW length is< 2. This indicates that the workaround is > > necessary, without any need to check the family-model-stepping ranges. > > > > It would also be correct if the BIOS disabled C1E and cleared the > > corresponding OSVW status bit. Anything else would probably be a very > > nasty BIOS bug. > > > > Could you send me the contents of MSRs 0xc0010140, 0xc0010141 and > > 0xc0010055? > > Knowing whether any C state above C1 is declared could be useful too. > rdmsr 0xc0010140 gives 2 rdmsr 0xc0010141 gives 0 rdmsr 0xc0010055 gives 0 And ARAT is definitely set where it wasn't before these updates. BTW we now have multiple reports of this, one system is a Compaq Presario CQ61 with an AMD Sempron M120 processor. I'll check on the C-states next. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/