From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752291AbdLDWwF (ORCPT ); Mon, 4 Dec 2017 17:52:05 -0500 Received: from userp2130.oracle.com ([156.151.31.86]:42755 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751754AbdLDWwE (ORCPT ); Mon, 4 Dec 2017 17:52:04 -0500 X-Greylist: delayed 16138 seconds by postgrey-1.27 at vger.kernel.org; Mon, 04 Dec 2017 17:52:03 EST Subject: Re: [patch 00/60] x86/kpti: Kernel Page Table Isolation (was KAISER) To: Thomas Gleixner , Linus Torvalds References: <20171204140706.296109558@linutronix.de> Cc: LKML , the arch/x86 maintainers , Andy Lutomirsky , Peter Zijlstra , Dave Hansen , Borislav Petkov , Greg KH , Kees Cook , Hugh Dickins , Brian Gerst , Josh Poimboeuf , Denys Vlasenko , Rik van Riel , Juergen Gross , David Laight , Eduardo Valentin , "Liguori, Anthony" , Will Deacon , Daniel Gruss From: Boris Ostrovsky Message-ID: <26f8e26d-c05d-4c30-50f2-d28133eb6cb3@oracle.com> Date: Mon, 4 Dec 2017 13:21:40 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8735 signatures=668637 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1712040260 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/04/2017 01:18 PM, Thomas Gleixner wrote: > On Mon, 4 Dec 2017, Linus Torvalds wrote: >> On Mon, Dec 4, 2017 at 6:07 AM, Thomas Gleixner wrote: >>> Kernel Page Table Isolation, prefix kpti_ >>> >>> Linus, your call :) >> I think you probably chose the right name here. The alternatives sound >> intriguing, but probably not the right thing to do. >> >> How much of this is considered worth trying to integrate early? > Probably the entry changes, but we need to sort out that fixmap issue first > and that affects the entry changes as well. Give me a day or two and I can > tell you. This series breaks Xen PV. When I tested it last time it was patch 17 (of this series). I don't know whether it breaks now due to the same patch, I haven't had a chance to look into this yet, sorry. -boris >> Clearly I'm not taking all of it. > I did not expect that. > > Thanks, > > tglx