Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753738AbbBSOO7 (ORCPT ); Thu, 19 Feb 2015 09:14:59 -0500 Received: from smtp02.citrix.com ([66.165.176.63]:62543 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752808AbbBSOO6 (ORCPT ); Thu, 19 Feb 2015 09:14:58 -0500 X-IronPort-AV: E=Sophos;i="5.09,608,1418083200"; d="scan'208";a="228944580" Message-ID: <54E5EFD0.1090100@citrix.com> Date: Thu, 19 Feb 2015 14:14:40 +0000 From: David Vrabel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.4.0 MIME-Version: 1.0 To: Boris Ostrovsky , , CC: , Subject: Re: [Xen-devel] [PATCH] x86/xen: Make sure X2APIC_ENABLE bit of MSR_IA32_APICBASE is not set References: <1423683558-25450-1-git-send-email-boris.ostrovsky@oracle.com> In-Reply-To: <1423683558-25450-1-git-send-email-boris.ostrovsky@oracle.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 717 Lines: 17 On 11/02/15 19:39, Boris Ostrovsky wrote: > Commit d524165cb8db ("x86/apic: Check x2apic early") tests X2APIC_ENABLE > bit of MSR_IA32_APICBASE when CONFIG_X86_X2APIC is off and panics > the kernel when this bit is set. > > Xen's PV guests will pass this MSR read to the hypervisor which will > return its version of the MSR, where this bit might be set. Make sure > we clear it before returning MSR value to the caller. Applied to stable/for-linus-3.20, thanks. David -- 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/