Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753403AbdLGMoC (ORCPT ); Thu, 7 Dec 2017 07:44:02 -0500 Received: from mail.skyhub.de ([5.9.137.197]:49316 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753003AbdLGMoB (ORCPT ); Thu, 7 Dec 2017 07:44:01 -0500 Date: Thu, 7 Dec 2017 13:43:47 +0100 From: Borislav Petkov To: Andy Lutomirski Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Brian Gerst , David Laight , Kees Cook , Peter Zijlstra Subject: Re: [PATCH] LDT improvements Message-ID: <20171207124347.p7kdj7q4qqs3ivri@pd.tnic> References: <48fe5cf1382d6a95c7b1837415882edcc81a9781.1512631324.git.luto@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <48fe5cf1382d6a95c7b1837415882edcc81a9781.1512631324.git.luto@kernel.org> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 604 Lines: 15 On Wed, Dec 06, 2017 at 11:22:21PM -0800, Andy Lutomirski wrote: > I think I like this approach. I also think it might be nice to move the > whole cpu_entry_area into this new pgd range so that we can stop mucking > around with the fixmap. Yeah, and also, I don't like the idea of sacrificing a whole PGD only for the LDT crap which is optional, even. Frankly - and this is just me - I'd make CONFIG_KERNEL_PAGE_TABLE_ISOLATION xor CONFIG_MODIFY_LDT_SYSCALL and don't give a rat's *ss about the LDT. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.