Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755695AbbHFT4M (ORCPT ); Thu, 6 Aug 2015 15:56:12 -0400 Received: from mail-wi0-f169.google.com ([209.85.212.169]:36405 "EHLO mail-wi0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753780AbbHFT4K (ORCPT ); Thu, 6 Aug 2015 15:56:10 -0400 MIME-Version: 1.0 In-Reply-To: References: <1434064996.11808.64.camel@misato.fc.hp.com> <557AAD910200007800084014@mail.emea.novell.com> <1434128306.11808.97.camel@misato.fc.hp.com> From: "Luis R. Rodriguez" Date: Thu, 6 Aug 2015 12:55:48 -0700 X-Google-Sender-Auth: jXcbG6cehYWPnRPZsiM_CaBYeiA Message-ID: Subject: Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2 To: Toshi Kani Cc: Jan Beulich , Andy Lutomirski , Bjorn Helgaas , Jej B , X86 ML , Andrew Morton , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , Julia Lawall , xen-devel@lists.xenproject.org, Dave Airlie , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , Juergen Gross , Borislav Petkov , Tomi Valkeinen , linux-fbdev , "linux-kernel@vger.kernel.org" , linux-media@vger.kernel.org, "linux-pci@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 774 Lines: 17 On Thu, Aug 6, 2015 at 12:53 PM, Luis R. Rodriguez wrote: > For those type of OSes... > could it be possible to negotiate or hint to the platform through an > attribute somehow that the OS has such capability to not use MTRR? And if that's not possible how about a new platform setting that would need to be set at the platform level to enable disabling this junk? Then only folks who know what they are doing would enable it, and if the customer set it, the issue would not be on the platform. Luis -- 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/