From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751879AbdFHOS5 (ORCPT ); Thu, 8 Jun 2017 10:18:57 -0400 Received: from mail-wr0-f182.google.com ([209.85.128.182]:34137 "EHLO mail-wr0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751677AbdFHOSp (ORCPT ); Thu, 8 Jun 2017 10:18:45 -0400 Date: Thu, 8 Jun 2017 15:18:42 +0100 From: Matt Fleming To: "Kirill A. Shutemov" Cc: Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Andi Kleen , Dave Hansen , Andy Lutomirski , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv7 05/14] x86/boot/efi: Define __KERNEL32_CS GDT on 64-bit configurations Message-ID: <20170608141842.GD3220@codeblueprint.co.uk> References: <20170606113133.22974-1-kirill.shutemov@linux.intel.com> <20170606113133.22974-6-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170606113133.22974-6-kirill.shutemov@linux.intel.com> User-Agent: Mutt/1.5.24+42 (6e565710a064) (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 06 Jun, at 02:31:24PM, Kirill A. Shutemov wrote: > We would need to switch temporarily to compatibility mode during booting > with 5-level paging enabled. It would require 32-bit code segment > descriptor. > > Signed-off-by: Kirill A. Shutemov > Cc: Matt Fleming > --- > arch/x86/boot/compressed/eboot.c | 25 +++++++++++++++++++++++-- > 1 file changed, 23 insertions(+), 2 deletions(-) Reviewed-by: Matt Fleming