From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f199.google.com (mail-pf0-f199.google.com [209.85.192.199]) by kanga.kvack.org (Postfix) with ESMTP id 1D5766B0006 for ; Tue, 30 Jan 2018 08:52:51 -0500 (EST) Received: by mail-pf0-f199.google.com with SMTP id e1so8309836pfi.10 for ; Tue, 30 Jan 2018 05:52:51 -0800 (PST) Received: from mga03.intel.com (mga03.intel.com. [134.134.136.65]) by mx.google.com with ESMTPS id l15si9418292pgs.496.2018.01.30.05.52.49 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 30 Jan 2018 05:52:49 -0800 (PST) From: "Kirill A. Shutemov" Subject: [PATCHv8 0/4] x86: 5-level related changes into decompression code Date: Tue, 30 Jan 2018 16:52:34 +0300 Message-Id: <20180130135239.72244-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Ingo Molnar , x86@kernel.org, Thomas Gleixner , "H. Peter Anvin" Cc: Linus Torvalds , Andy Lutomirski , Cyrill Gorcunov , Borislav Petkov , Andi Kleen , Matthew Wilcox , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" These patcheset is a preparation for boot-time switching between paging modes. Please apply. The first patch is pure cosmetic change: it gives file with KASLR helpers a proper name. The last three patches bring support of booting into 5-level paging mode if a bootloader put the kernel above 4G. Patch 2/4 Renames l5_paging_required() into paging_prepare() and change interface of the function. Patch 3/4 Handles allocation of space for trampoline and gets it prepared. Patch 4/4 Gets trampoline used. v8: - Support switching from 5- to 4-level paging. v7: - Fix booting when 5-level paging is enabled before handing off boot to the kernel, like in kexec() case. Kirill A. Shutemov (4): x86/boot/compressed/64: Rename pagetable.c to kaslr_64.c x86/boot/compressed/64: Introduce paging_prepare() x86/boot/compressed/64: Prepare trampoline memory x86/boot/compressed/64: Handle 5-level paging boot if kernel is above 4G arch/x86/boot/compressed/Makefile | 2 +- arch/x86/boot/compressed/head_64.S | 158 ++++++++++++++------- .../boot/compressed/{pagetable.c => kaslr_64.c} | 0 arch/x86/boot/compressed/pgtable.h | 18 +++ arch/x86/boot/compressed/pgtable_64.c | 77 ++++++++-- 5 files changed, 189 insertions(+), 66 deletions(-) rename arch/x86/boot/compressed/{pagetable.c => kaslr_64.c} (100%) create mode 100644 arch/x86/boot/compressed/pgtable.h -- 2.15.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org