From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751297AbdGQFpa (ORCPT ); Mon, 17 Jul 2017 01:45:30 -0400 Received: from mx2.suse.de ([195.135.220.15]:36051 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751248AbdGQFp2 (ORCPT ); Mon, 17 Jul 2017 01:45:28 -0400 Subject: Re: [PATCH 3/8] x86/xen: Redefine XEN_ELFNOTE_INIT_P2M using PUD_SIZE * PTRS_PER_PUD To: "Kirill A. Shutemov" , Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20170716225954.74185-1-kirill.shutemov@linux.intel.com> <20170716225954.74185-4-kirill.shutemov@linux.intel.com> From: Juergen Gross Message-ID: Date: Mon, 17 Jul 2017 07:45:24 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <20170716225954.74185-4-kirill.shutemov@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 17/07/17 00:59, Kirill A. Shutemov wrote: > XEN_ELFNOTE_INIT_P2M has to be 512GB for both 4- and 5-level paging. > (PUD_SIZE * PTRS_PER_PUD) would do this. > > Unfortunately, we cannot use P4D_SIZE, which would fit here. With > current headers structure it cannot be used in assembly, if p4d > level is folded. > > Signed-off-by: Kirill A. Shutemov Reviewed-by: Juergen Gross Thanks, Juergen