From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kirill A. Shutemov" Subject: [PATCHv4 32/33] x86: enable 5-level paging support Date: Mon, 6 Mar 2017 16:53:56 +0300 Message-ID: <20170306135357.3124-33-kirill.shutemov@linux.intel.com> References: <20170306135357.3124-1-kirill.shutemov@linux.intel.com> Return-path: In-Reply-To: <20170306135357.3124-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org To: Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , Arnd Bergmann , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" List-Id: linux-arch.vger.kernel.org Most of things are in place and we can enable support of 5-level paging. Enabling XEN with 5-level paging requires more work. The patch makes XEN dependent on !X86_5LEVEL. Signed-off-by: Kirill A. Shutemov --- arch/x86/Kconfig | 5 +++++ arch/x86/xen/Kconfig | 1 + 2 files changed, 6 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 747f06f00a22..43b3343402f5 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -317,6 +317,7 @@ config FIX_EARLYCON_MEM config PGTABLE_LEVELS int + default 5 if X86_5LEVEL default 4 if X86_64 default 3 if X86_PAE default 2 @@ -1381,6 +1382,10 @@ config X86_PAE has the cost of more pagetable lookup overhead, and also consumes more pagetable space per process. +config X86_5LEVEL + bool "Enable 5-level page tables support" + depends on X86_64 + config ARCH_PHYS_ADDR_T_64BIT def_bool y depends on X86_64 || X86_PAE diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig index 76b6dbd627df..b90d481ce5a1 100644 --- a/arch/x86/xen/Kconfig +++ b/arch/x86/xen/Kconfig @@ -5,6 +5,7 @@ config XEN bool "Xen guest support" depends on PARAVIRT + depends on !X86_5LEVEL select PARAVIRT_CLOCK select XEN_HAVE_PVMMU select XEN_HAVE_VPMU -- 2.11.0 -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga09.intel.com ([134.134.136.24]:23554 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753150AbdCFOA1 (ORCPT ); Mon, 6 Mar 2017 09:00:27 -0500 From: "Kirill A. Shutemov" Subject: [PATCHv4 32/33] x86: enable 5-level paging support Date: Mon, 6 Mar 2017 16:53:56 +0300 Message-ID: <20170306135357.3124-33-kirill.shutemov@linux.intel.com> In-Reply-To: <20170306135357.3124-1-kirill.shutemov@linux.intel.com> References: <20170306135357.3124-1-kirill.shutemov@linux.intel.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , Arnd Bergmann , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Message-ID: <20170306135356.88xQl67tGj13XybA4T52xYi2E8xzfBjs3j_BzdPQtes@z> Most of things are in place and we can enable support of 5-level paging. Enabling XEN with 5-level paging requires more work. The patch makes XEN dependent on !X86_5LEVEL. Signed-off-by: Kirill A. Shutemov --- arch/x86/Kconfig | 5 +++++ arch/x86/xen/Kconfig | 1 + 2 files changed, 6 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 747f06f00a22..43b3343402f5 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -317,6 +317,7 @@ config FIX_EARLYCON_MEM config PGTABLE_LEVELS int + default 5 if X86_5LEVEL default 4 if X86_64 default 3 if X86_PAE default 2 @@ -1381,6 +1382,10 @@ config X86_PAE has the cost of more pagetable lookup overhead, and also consumes more pagetable space per process. +config X86_5LEVEL + bool "Enable 5-level page tables support" + depends on X86_64 + config ARCH_PHYS_ADDR_T_64BIT def_bool y depends on X86_64 || X86_PAE diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig index 76b6dbd627df..b90d481ce5a1 100644 --- a/arch/x86/xen/Kconfig +++ b/arch/x86/xen/Kconfig @@ -5,6 +5,7 @@ config XEN bool "Xen guest support" depends on PARAVIRT + depends on !X86_5LEVEL select PARAVIRT_CLOCK select XEN_HAVE_PVMMU select XEN_HAVE_VPMU -- 2.11.0