Changes in Kconfig

93d09773 - xz: add RISC-V BCJ filter

Sun, 21 Jul 2024 13:36:27 +0000

xz: add RISC-V BCJ filterA later commit updates lib/decompress_unxz.c to enable this filter forkernel decompression. lib/decompress_unxz.c is already used ifCONFIG_EFI_ZBOOT=y && CONFIG_KERNEL_XZ=y.This filter can be used by Squashfs without modifications to the Squashfskernel code (only needs support in userspace Squashfs-tools).Link: https://lkml.kernel.org/r/20240721133633.47721-13-lasse.collin@tukaani.orgSigned-off-by: Lasse Collin Reviewed-by: Sam James Cc: Albert Ou Cc: Catalin Marinas Cc: Emil Renner Berthing Cc: Greg Kroah-Hartman Cc: Herbert Xu Cc: Joel Stanley Cc: Jonathan Corbet Cc: Jubin Zhong Cc: Jules Maselbas Cc: Krzysztof Kozlowski Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Randy Dunlap Cc: Rui Li Cc: Simon Glass Cc: Thomas Gleixner Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux-6.15/lib/xz/Kconfig

4b62813f - xz: Add ARM64 BCJ filter

Sun, 21 Jul 2024 13:36:26 +0000

xz: Add ARM64 BCJ filterAlso omit a duplicated check for XZ_DEC_ARM in xz_private.h.A later commit updates lib/decompress_unxz.c to enable this filter forkernel decompression. lib/decompress_unxz.c is already used ifCONFIG_EFI_ZBOOT=y && CONFIG_KERNEL_XZ=y.This filter can be used by Squashfs without modifications to the Squashfskernel code (only needs support in userspace Squashfs-tools).Link: https://lkml.kernel.org/r/20240721133633.47721-12-lasse.collin@tukaani.orgSigned-off-by: Lasse Collin Reviewed-by: Sam James Cc: Albert Ou Cc: Catalin Marinas Cc: Emil Renner Berthing Cc: Greg Kroah-Hartman Cc: Herbert Xu Cc: Joel Stanley Cc: Jonathan Corbet Cc: Jubin Zhong Cc: Jules Maselbas Cc: Krzysztof Kozlowski Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Randy Dunlap Cc: Rui Li Cc: Simon Glass Cc: Thomas Gleixner Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux-6.15/lib/xz/Kconfig

ff221153 - xz: fix comments and coding style

Sun, 21 Jul 2024 13:36:19 +0000

xz: fix comments and coding style- Fix comments that were no longer in sync with the code below them.- Fix language errors.- Fix coding style.Link: https://lkml.kernel.org/r/20240721133633.47721-5-lasse.collin@tukaani.orgSigned-off-by: Lasse Collin Reviewed-by: Sam James Cc: Albert Ou Cc: Catalin Marinas Cc: Emil Renner Berthing Cc: Greg Kroah-Hartman Cc: Herbert Xu Cc: Joel Stanley Cc: Jonathan Corbet Cc: Jubin Zhong Cc: Jules Maselbas Cc: Krzysztof Kozlowski Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Randy Dunlap Cc: Rui Li Cc: Simon Glass Cc: Thomas Gleixner Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux-6.15/lib/xz/Kconfig

cf8e8658 - arch: Remove Itanium (IA-64) architecture

Thu, 20 Oct 2022 13:54:33 +0000

arch: Remove Itanium (IA-64) architectureThe Itanium architecture is obsolete, and an informal survey [0] revealsthat any residual use of Itanium hardware in production is mostly HP-UXor OpenVMS based. The use of Linux on Itanium appears to be limited toenthusiasts that occasionally boot a fresh Linux kernel to see whetherthings are still working as intended, and perhaps to churn out somedistro packages that are rarely used in practice.None of the original companies behind Itanium still produce or supportany hardware or software for the architecture, and it is listed as'Orphaned' in the MAINTAINERS file, as apparently, none of the engineersthat contributed on behalf of those companies (nor anyone else, for thatmatter) have been willing to support or maintain the architectureupstream or even be responsible for applying the odd fix. The Intelfirmware team removed all IA-64 support from the Tianocore/EDK2reference implementation of EFI in 2018. (Itanium is the originalarchitecture for which EFI was developed, and the way Linux supports itdeviates significantly from other architectures.) Some distros, such asDebian and Gentoo, still maintain [unofficial] ia64 ports, but many havedropped support years ago.While the argument is being made [1] that there is a 'for the commongood' angle to being able to build and run existing projects such as theGrid Community Toolkit [2] on Itanium for interoperability testing, thefact remains that none of those projects are known to be deployed onLinux/ia64, and very few people actually have access to such a system inthe first place. Even if there were ways imaginable in which Linux/ia64could be put to good use today, what matters is whether anyone isactually doing that, and this does not appear to be the case.There are no emulators widely available, and so boot testing Itanium isgenerally infeasible for ordinary contributors. GCC still supports IA-64but its compile farm [3] no longer has any IA-64 machines. GLIBC wouldlike to get rid of IA-64 [4] too because it would permit some overduecode cleanups. In summary, the benefits to the ecosystem of having IA-64be part of it are mostly theoretical, whereas the maintenance overheadof keeping it supported is real.So let's rip off the band aid, and remove the IA-64 arch code entirely.This follows the timeline proposed by the Debian/ia64 maintainer [5],which removes support in a controlled manner, leaving IA-64 in a knowngood state in the most recent LTS release. Other projects will followonce the kernel support is removed.[0] https://lore.kernel.org/all/CAMj1kXFCMh_578jniKpUtx_j8ByHnt=s7S+yQ+vGbKt9ud7+kQ@mail.gmail.com/[1] https://lore.kernel.org/all/0075883c-7c51-00f5-2c2d-5119c1820410@web.de/[2] https://gridcf.org/gct-docs/latest/index.html[3] https://cfarm.tetaneutral.net/machines/list/[4] https://lore.kernel.org/all/87bkiilpc4.fsf@mid.deneb.enyo.de/[5] https://lore.kernel.org/all/ff58a3e76e5102c94bb5946d99187b358def688a.camel@physik.fu-berlin.de/Acked-by: Tony Luck Signed-off-by: Ard Biesheuvel List of files: /linux-6.15/lib/xz/Kconfig

aaa2975f - lib/xz: Add MicroLZMA decoder

Sun, 10 Oct 2021 21:31:42 +0000

lib/xz: Add MicroLZMA decoderMicroLZMA is a yet another header format variant where the firstbyte of a raw LZMA stream (without the end of stream marker) hasbeen replaced with a bitwise-negation of the lc/lp/pb propertiesbyte. MicroLZMA was created to be used in EROFS but can be usedby other things too where wasting minimal amount of space forheaders is important.This is implemented using most of the LZMA2 code as is so theamount of new code is small. The API has a few extra featurescompared to the XZ decoder. On the other hand, the API lacksXZ_BUF_ERROR support which is important to take into accountwhen using this API.MicroLZMA doesn't support BCJ filters. In theory they could beadded later as there are many unused/reserved values for thefirst byte of the compressed stream but in practice it issomewhat unlikely to happen due to a few implementation reasons.Link: https://lore.kernel.org/r/20211010213145.17462-5-xiang@kernel.orgSigned-off-by: Lasse Collin Signed-off-by: Gao Xiang List of files: /linux-6.15/lib/xz/Kconfig

8e2a46a4 - docs: move remaining stuff under Documentation/*.txt to Documentation/staging

Mon, 15 Jun 2020 06:50:25 +0000

docs: move remaining stuff under Documentation/*.txt to Documentation/stagingThere are several files that I was unable to find a proper placefor them, and 3 ones that are still in plain old text format.Let's place those stuff behind the carpet, as we'd like to keep theroot directory clean.We can later discuss and move those into better places.Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/11bd0d75e65a874f7c276a0aeab0fe13f3376f5f.1592203650.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet List of files: /linux-6.15/lib/xz/Kconfig

ec8f24b7 - treewide: Add SPDX license identifier - Makefile/Kconfig

Sun, 19 May 2019 12:07:45 +0000

treewide: Add SPDX license identifier - Makefile/KconfigAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0-onlySigned-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/lib/xz/Kconfig

bf4d064d - lib/xz: enable all filters by default in Kconfig

Wed, 04 Jun 2014 23:11:50 +0000

lib/xz: enable all filters by default in KconfigThis restores the old behavior that existed before 2013-02-22, whenchanges were made by 64dbfb444c150 ("decompressors: drop dependency onCONFIG_EXPERT") and 5dc49c75a2 ("decompressors: make the defaultXZ_DEC_* config match the selected architecture").Disabling the filters only makes sense on embedded systems.Signed-off-by: Lasse Collin Acked-by: Kyle McMartin Cc: Florian Fainelli Cc: Phillip Lougher Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/lib/xz/Kconfig

97da55fc - decompressors: fix typo "POWERPC"

Wed, 13 Mar 2013 21:59:44 +0000

decompressors: fix typo "POWERPC"Commit 5dc49c75a26b ("decompressors: make the default XZ_DEC_* configmatch the selected architecture") added default y if POWERPCto lib/xz/Kconfig. But there is no Kconfig symbol POWERPC. The mostgeneral Kconfig symbol for the powerpc architecture is PPC. So let'suse that.Signed-off-by: Paul Bolle Cc: Florian Fainelli Cc: Lasse Collin Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/lib/xz/Kconfig

5dc49c75 - decompressors: make the default XZ_DEC_* config match the selected architecture

Fri, 22 Feb 2013 00:44:12 +0000

decompressors: make the default XZ_DEC_* config match the selected architectureChange the defautl XZ_DEC_* config symbol to match the configuredarchitecture. It is perfectly legitimate to support multiple XZ BCJfilters for different architectures (e.g.: to mount foreign squashfs/xzcompressed filesystems), it is however more natural not to select them allby default, but only the one matching the configured architecture.Signed-off-by: Florian Fainelli Acked-by: Lasse Collin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/lib/xz/Kconfig

64dbfb44 - decompressors: drop dependency on CONFIG_EXPERT

Fri, 22 Feb 2013 00:44:11 +0000

decompressors: drop dependency on CONFIG_EXPERTRemove the XZ_DEC_* depedencey on CONFIG_EXPERT as recommended by LasseColin.Signed-off-by: Florian Fainelli Acked-by: Lasse Collin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/lib/xz/Kconfig

9d749629 - decompressors: group XZ_DEC_* symbols under an if XZ_BCJ / endif

Fri, 22 Feb 2013 00:44:10 +0000

decompressors: group XZ_DEC_* symbols under an if XZ_BCJ / endifGroup all architecture-specific BCJ filter configuration symbols under anif XZ_BCJ / endif statement.Signed-off-by: Florian Fainelli Acked-by: Lasse Collin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/lib/xz/Kconfig

6a108a14 - kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT

Thu, 20 Jan 2011 22:44:16 +0000

kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERTThe meaning of CONFIG_EMBEDDED has long since been obsoleted; the optionis used to configure any non-standard kernel with a much larger scope thanonly small devices.This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixesreferences to the option throughout the kernel. A new CONFIG_EMBEDDEDoption is added that automatically selects CONFIG_EXPERT when enabled andcan be used in the future to isolate options that should only beconsidered for embedded systems (RISC architectures, SLOB, etc).Calling the option "EXPERT" more accurately represents its intention: onlyexpert users who understand the impact of the configuration changes theyare making should enable it.Reviewed-by: Ingo Molnar Acked-by: David Woodhouse Signed-off-by: David Rientjes Cc: Greg KH Cc: "David S. Miller" Cc: Jens Axboe Cc: Arnd Bergmann Cc: Robin Holt Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/lib/xz/Kconfig

24fa0402 - decompressors: add XZ decompressor module

Thu, 13 Jan 2011 01:01:22 +0000

decompressors: add XZ decompressor moduleIn userspace, the .lzma format has become mostly a legacy file format thatgot superseded by the .xz format. Similarly, LZMA Utils was superseded byXZ Utils.These patches add support for XZ decompression into the kernel. Most ofthe code is as is from XZ Embedded .It was written for the Linux kernel but is usable in other projects too.Advantages of XZ over the current LZMA code in the kernel: - Nice API that can be used by other kernel modules; it's not limited to kernel, initramfs, and initrd decompression. - Integrity check support (CRC32) - BCJ filters improve compression of executable code on certain architectures. These together with LZMA2 can produce a few percent smaller kernel or Squashfs images than plain LZMA without making the decompression slower.This patch: Add the main decompression code (xz_dec), testing module(xz_dec_test), wrapper script (xz_wrap.sh) for the xz command line tool,and documentation. The xz_dec module is enough to have a usable XZdecompressor e.g. for Squashfs.Signed-off-by: Lasse Collin Cc: "H. Peter Anvin" Cc: Alain Knaff Cc: Albin Tonnerre Cc: Phillip Lougher Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/lib/xz/Kconfig