From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f70.google.com (mail-pg0-f70.google.com [74.125.83.70]) by kanga.kvack.org (Postfix) with ESMTP id 89BC26B0003 for ; Fri, 16 Feb 2018 06:49:55 -0500 (EST) Received: by mail-pg0-f70.google.com with SMTP id l1so1976026pga.1 for ; Fri, 16 Feb 2018 03:49:55 -0800 (PST) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTPS id v3-v6si367116ply.829.2018.02.16.03.49.54 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Feb 2018 03:49:54 -0800 (PST) From: "Kirill A. Shutemov" Subject: [PATCH 0/3] x86/mm/5lvl: Optimize boot-time switching, allow more Xen modes Date: Fri, 16 Feb 2018 14:49:45 +0300 Message-Id: <20180216114948.68868-1-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 , Borislav Petkov , Andi Kleen , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" This is the last batch of patches that enable boot-time switching between paging modes. The first patch allows two more Xen modes to be enabled with CONFIG_X86_5LEVEL=y. These modes don't support 5-level paging, but we can use them when boot into 4-level paging mode. The last two patches optimize switching between paging modes by using code pathching in all hot paths. Please review and cosider applying. Kirill A. Shutemov (3): x86/xen: Allow XEN_PV and XEN_PVH to be enabled with X86_5LEVEL x86/mm: Redefine some of page table helpers as macros x86/mm: Offset boot-time paging mode switching cost arch/x86/boot/compressed/misc.h | 5 +++++ arch/x86/entry/entry_64.S | 11 ++--------- arch/x86/include/asm/paravirt.h | 23 +++++++++++++---------- arch/x86/include/asm/pgtable_64_types.h | 5 ++++- arch/x86/kernel/head64.c | 9 +++++++-- arch/x86/kernel/head_64.S | 14 +++++++------- arch/x86/mm/kasan_init_64.c | 6 ++++++ arch/x86/xen/Kconfig | 5 ----- arch/x86/xen/mmu_pv.c | 21 +++++++++++++++++++++ 9 files changed, 65 insertions(+), 34 deletions(-) -- 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