Changes in pgtable-types.h

a6bbf5d4 - arm64: mm: Add definitions to support 5 levels of paging

Wed, 14 Feb 2024 12:29:17 +0000

arm64: mm: Add definitions to support 5 levels of pagingAdd the required types and descriptor accessors to support 5 levels ofpaging in the common code. This is one of the prerequisites forsupporting 52-bit virtual addressing with 4k pages.Note that this does not cover the code that handles kernel mappings orthe fixmap.Signed-off-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20240214122845.2033971-76-ardb+git@google.comSigned-off-by: Catalin Marinas List of files: /linux-6.15/arch/arm64/include/asm/pgtable-types.h

e9f63768 - arm64: add support for folded p4d page tables

Thu, 04 Jun 2020 23:46:23 +0000

arm64: add support for folded p4d page tablesImplement primitives necessary for the 4th level folding, add walks of p4dlevel where appropriate, replace 5level-fixup.h with pgtable-nop4d.h andremove __ARCH_USE_5LEVEL_HACK.[arnd@arndb.de: fix gcc-10 shift warning] Link: http://lkml.kernel.org/r/20200429185657.4085975-1-arnd@arndb.deSigned-off-by: Mike Rapoport Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Brian Cain Cc: Catalin Marinas Cc: Christophe Leroy Cc: Fenghua Yu Cc: Geert Uytterhoeven Cc: Guan Xuetao Cc: James Morse Cc: Jonas Bonn Cc: Julien Thierry Cc: Ley Foon Tan Cc: Marc Zyngier Cc: Michael Ellerman Cc: Paul Mackerras Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Suzuki K Poulose Cc: Tony Luck Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200414153455.21744-4-rppt@kernel.orgSigned-off-by: Linus Torvalds List of files: /linux-6.15/arch/arm64/include/asm/pgtable-types.h

caab277b - treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234

Mon, 03 Jun 2019 05:44:50 +0000

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licensesextracted by the scancode license scanner the SPDX license identifier GPL-2.0-onlyhas been chosen to replace the boilerplate/reference in 503 file(s).Signed-off-by: Thomas Gleixner Reviewed-by: Alexios Zavras Reviewed-by: Allison Randal Reviewed-by: Enrico Weigelt Cc: linux-spdx@vger.kernel.orgLink: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.deSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/arm64/include/asm/pgtable-types.h

9849a569 - arch, mm: convert all architectures to use 5level-fixup.h

Thu, 09 Mar 2017 14:24:05 +0000

arch, mm: convert all architectures to use 5level-fixup.hIf an architecture uses 4level-fixup.h we don't need to do anything asit includes 5level-fixup.h.If an architecture uses pgtable-nop*d.h, define __ARCH_USE_5LEVEL_HACKbefore inclusion of the header. It makes asm-generic code to use5level-fixup.h.If an architecture has 4-level paging or folds levels on its own,include 5level-fixup.h directly.Signed-off-by: Kirill A. Shutemov Acked-by: Michal Hocko Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/arm64/include/asm/pgtable-types.h

2326df55 - arm64: always use STRICT_MM_TYPECHECKS

Fri, 29 Apr 2016 21:07:54 +0000

arm64: always use STRICT_MM_TYPECHECKSInspired by the counterpart of powerpc [1], which shows there is no negativeeffect on code generation from enabling STRICT_MM_TYPECHECKS with a moderncompiler.And, Arnd's comment [2] about that patch says STRICT_MM_TYPECHECKS couldbe default as long as the architecture can pass structures in registers asfunction arguments. ARM64 can do it as long as the size of structure <= 16bytes. All the page table value types are u64 on ARM64.The below disassembly demonstrates it, entry is pte_t type: entry = arch_make_huge_pte(entry, vma, page, writable); 0xffff00000826fc38 <+80>: and x0, x0, #0xfffffffffffffffd 0xffff00000826fc3c <+84>: mov w3, w21 0xffff00000826fc40 <+88>: mov x2, x20 0xffff00000826fc44 <+92>: mov x1, x19 0xffff00000826fc48 <+96>: orr x0, x0, #0x400 0xffff00000826fc4c <+100>: bl 0xffff00000809bcc0 [1] http://www.spinics.net/lists/linux-mm/msg105951.html[2] http://www.spinics.net/lists/linux-mm/msg105969.htmlCc: Ard Biesheuvel Acked-by: Arnd Bergmann Acked-by: Catalin Marinas Signed-off-by: Yang Shi Signed-off-by: Will Deacon List of files: /linux-6.15/arch/arm64/include/asm/pgtable-types.h

9f25e6ad - arm64: expose number of page table levels on Kconfig level

Tue, 14 Apr 2015 22:45:39 +0000

arm64: expose number of page table levels on Kconfig levelWe would want to use number of page table level to define mm_struct.Let's expose it as CONFIG_PGTABLE_LEVELS.ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined beforesourcing init/Kconfig: arch/Kconfig will define default value and it'ssourced from init/Kconfig.Signed-off-by: Kirill A. Shutemov Acked-by: Catalin Marinas Cc: Will Deacon Tested-by: Guenter Roeck Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/arm64/include/asm/pgtable-types.h

0f174025 - arm64: Remove asm/pgtable-*level-types.h files

Tue, 15 Jul 2014 15:35:38 +0000

arm64: Remove asm/pgtable-*level-types.h filesThe macros and typedefs in these files are already duplicated, so justuse a single pgtable-types.h file with the corresponding #ifdefs.Signed-off-by: Catalin Marinas Tested-by: Jungseok Lee List of files: /linux-6.15/arch/arm64/include/asm/pgtable-types.h