From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757232AbcBRVcW (ORCPT ); Thu, 18 Feb 2016 16:32:22 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:26358 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757146AbcBRVcV (ORCPT ); Thu, 18 Feb 2016 16:32:21 -0500 Subject: Re: [PATCH] x86/ptdump: Remove paravirt_enabled() To: Borislav Petkov , X86 ML References: <1455825641-19585-1-git-send-email-bp@alien8.de> Cc: LKML , Andy Lutomirski , "Luis R. Rodriguez" From: Boris Ostrovsky Message-ID: <56C6383F.9010405@oracle.com> Date: Thu, 18 Feb 2016 16:31:43 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: <1455825641-19585-1-git-send-email-bp@alien8.de> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: aserv0022.oracle.com [141.146.126.234] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/18/2016 03:00 PM, Borislav Petkov wrote: > From: Borislav Petkov > > is_hypervisor_range() can simply check if the PGD index is > within ffff800000000000 - ffff87ffffffffff which is the range > reserved for a hypervisor. That range is practically an ABI, see > Documentation/x86/x86_64/mm.txt. > > Signed-off-by: Borislav Petkov > Cc: Andy Lutomirski > Cc: Boris Ostrovsky > Cc: "Luis R. Rodriguez" Under Xen, as PV guest: Tested-by: Boris Ostrovsky