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Lasse Collin 7472ff8ada xz: adjust arch-specific options for better kernel compression 
Use LZMA2 options that match the arch-specific alignment of instructions. 
This change reduces compressed kernel size 0-2 % depending on the arch. 
On 1-byte-aligned x86 it makes no difference and on 4-byte-aligned archs
it helps the most.

Use the ARM-Thumb filter for ARM-Thumb2 kernels.  This reduces compressed
kernel size about 5 %.[1] Previously such kernels were compressed using
the ARM filter which didn't do anything useful with ARM-Thumb2 code.

Add BCJ filter support for ARM64 and RISC-V.  Compared to unfiltered XZ or
plain LZMA, the compressed kernel size is reduced about 5 % on ARM64 and 7
% on RISC-V.  A new enough version of the xz tool is required: 5.4.0 for
ARM64 and 5.6.0 for RISC-V.  With an old xz version, a message is printed
to standard error and the kernel is compressed without the filter.

Update lib/decompress_unxz.c to match the changes to xz_wrap.sh.

Update the CONFIG_KERNEL_XZ help text in init/Kconfig:
  - Add the RISC-V and ARM64 filters.
  - Clarify that the PowerPC filter is for big endian only.
  - Omit IA-64.

Link: https://lore.kernel.org/lkml/1637379771-39449-1-git-send-email-zhongjubin@huawei.com/ [1]
Link: https://lkml.kernel.org/r/20240721133633.47721-15-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-09-01 20:43:27 -07:00
..
atomic locking/atomic: scripts: fix ${atomic}_sub_and_test() kerneldoc 2024-06-05 15:52:34 +02:00
basic kbuild: implement CONFIG_TRIM_UNUSED_KSYMS without recursion 2023-06-22 21:21:06 +09:00
clang-tools gen_compile_commands: fix invalid escape sequence warning 2024-02-15 06:57:19 +09:00
coccinelle Coccinelle: pm_runtime: Fix grammar in comment 2024-05-20 21:31:33 +02:00
dtc Devicetree updates for v6.11: 2024-07-17 18:07:31 -07:00
dummy-tools kbuild: dummy-tools: pretend we understand -fpatchable-function-entry 2023-11-01 23:24:56 +09:00
gcc-plugins gcc-plugins: randstruct: Remove GCC 4.7 or newer requirement 2024-08-05 14:34:23 -07:00
gdb - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
genksyms kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
include kbuild: move some helper headers from scripts/kconfig/ to scripts/include/ 2024-07-21 23:10:43 +09:00
kconfig scripts: kconfig: merge_config: config files: add a trailing newline 2024-08-06 14:02:12 +09:00
ksymoops
mod Kbuild updates for v6.11 2024-07-23 14:32:21 -07:00
package kbuild: rpm-pkg: ghost modules.weakdep file 2024-07-28 17:07:03 +09:00
selinux selinux: remove runtime disable message in the install_policy.sh script 2022-09-20 14:12:25 -04:00
tracing tracing: Always use canonical ftrace path 2023-02-18 14:34:09 -05:00
.gitignore rust: support running Rust documentation tests as KUnit ones 2023-07-19 09:32:53 -06:00
as-version.sh kbuild: Update assembler calls to use proper flags and language target 2023-01-26 12:41:38 +09:00
asn1_compiler.c ASN.1: Fix check for strdup() success 2023-04-21 08:58:00 -07:00
bloat-o-meter scripts/bloat-o-meter: count weak symbol sizes 2023-08-21 13:46:25 -07:00
bootgraph.pl
bpf_doc.py scripts/bpf_doc: Use silent mode when exec make cmd 2024-03-15 14:46:31 +01:00
build-version kbuild: move init/build-version to scripts/ 2024-07-16 01:08:37 +09:00
cc-can-link.sh
cc-version.sh scripts: Remove ICC-related dead code 2023-04-24 10:18:32 -07:00
check-git kbuild: use git-archive for source package creation 2023-03-16 22:46:12 +09:00
check-sysctl-docs scripts: check-sysctl-docs: handle per-namespace sysctls 2024-02-23 12:13:09 +01:00
check-uapi.sh check-uapi: Introduce check-uapi.sh 2023-12-29 22:25:20 +09:00
check-variable-fonts.sh docs: scripts/check-variable-fonts.sh: Improve commands for detection 2024-05-02 10:14:52 -06:00
check_extable.sh
checkdeclares.pl
checkincludes.pl
checkkconfigsymbols.py scripts: handle BrokenPipeError for python scripts 2023-01-26 12:43:33 +09:00
checkpatch.pl net: drop special comment style 2024-08-23 10:21:02 +01:00
checkstack.pl scripts/checkstack.pl: fix no space expression between sp and offset 2023-12-29 12:22:28 -08:00
checksyscalls.sh checksyscalls: ignore fstat to silence build warning on LoongArch 2023-03-23 17:18:32 -07:00
checktransupdate.py scripts: add scripts/checktransupdate.py 2024-06-12 15:24:11 -06:00
checkversion.pl
cleanfile
cleanpatch
coccicheck scripts: coccicheck: Use /usr/bin/env 2023-02-25 20:11:06 +01:00
config
const_structs.checkpatch sound updates for 6.11-rc1 2024-07-19 12:39:34 -07:00
decode_stacktrace.sh scripts/decode_stacktrace.sh: better support to ARM32 module stack trace 2024-06-24 22:25:00 -07:00
decodecode scripts/decodecode: add support for LoongArch 2023-12-29 12:22:25 -08:00
depmod.sh kbuild: move depmod rule to scripts/Makefile.modinst 2023-08-29 22:38:23 +09:00
dev-needs.sh
diffconfig scripts: handle BrokenPipeError for python scripts 2023-01-26 12:43:33 +09:00
documentation-file-ref-check
export_report.pl
extract-ikconfig scripts/extract-ikconfig: add zstd compression support 2022-08-29 13:58:47 +09:00
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
extract_xc3028.pl
faddr2line scripts/faddr2line: Check only two symbols when calculating symbol size 2024-07-02 23:38:37 -07:00
file-size.sh
find-unused-docs.sh
gcc-x86_32-has-stack-protector.sh kbuild: Fix '-S -c' in x86 stack protector scripts 2024-07-29 03:47:00 +09:00
gcc-x86_64-has-stack-protector.sh kbuild: Fix '-S -c' in x86 stack protector scripts 2024-07-29 03:47:00 +09:00
gen-randstruct-seed.sh randstruct: Move seed generation into scripts/basic/ 2022-05-08 01:33:07 -07:00
generate_initcall_order.pl
generate_rust_analyzer.py rust: Support latest version of rust-analyzer 2024-08-07 01:16:52 +02:00
generate_rust_target.rs rust: x86: remove -3dnow{,a} from target features 2024-08-10 00:05:10 +02:00
get_abi.pl scripts/get_abi.pl: ignore some temp files 2024-01-03 14:02:17 -07:00
get_dvb_firmware
get_feat.pl scripts: get_feat.pl: use /usr/bin/env to find perl 2022-06-30 12:22:17 -06:00
get_maintainer.pl get_maintainer: remove stray punctuation when cleaning file emails 2023-12-31 10:57:42 -08:00
gfp-translate scripts: fix the gfp flags header path in gfp-translate 2023-06-19 13:19:32 -07:00
git.orderFile scripts: Introduce a default git.orderFile 2023-12-29 22:25:20 +09:00
head-object-list.txt powerpc: Remove core support for 40x 2024-06-28 22:28:47 +10:00
headerdep.pl
headers_install.sh m68k: Avoid CONFIG_COLDFIRE switch in uapi header 2024-05-07 08:55:23 +10:00
insert-sys-cert.c
install.sh kbuild: Create INSTALL_PATH directory if it does not exist 2024-07-20 13:34:54 +09:00
jobserver-exec scripts: support GNU make 4.4 in jobserver-exec 2023-01-16 20:15:20 +09:00
kallsyms.c kallsyms: Do not cleanup .llvm.<hash> suffix before sorting symbols 2024-08-15 09:33:34 -07:00
Kbuild.include kbuild: raise the minimum GNU Make requirement to 4.0 2024-07-16 16:07:14 +09:00
Kconfig.include x86/kconfig: Add as-instr64 macro to properly evaluate AS_WRUSS 2024-06-20 19:48:18 +02:00
kernel-doc mm/slab: Plumb kmem_buckets into __do_kmalloc_node() 2024-07-03 12:24:19 +02:00
ld-version.sh kbuild: Make ld-version.sh more robust against version string changes 2024-07-15 03:13:32 +09:00
leaking_addresses.pl leaking_addresses: Provide mechanism to scan binary files 2024-02-29 13:38:03 -08:00
Lindent
link-vmlinux.sh Kbuild fixes for v6.11 (2nd) 2024-08-23 07:43:15 +08:00
make_fit.py scripts/make_fit: Support decomposing DTBs 2024-07-16 01:08:37 +09:00
Makefile arch: um: rust: Add i386 support for Rust 2024-07-03 12:22:22 +02:00
Makefile.asm-headers kbuild: fix rebuild of generic syscall headers 2024-07-18 10:01:55 -07:00
Makefile.btf kbuild,bpf: Add module-specific pahole flags for distilled base BTF 2024-06-21 14:45:07 -07:00
Makefile.build kbuild: fix typos "prequisites" to "prerequisites" 2024-08-23 02:41:02 +09:00
Makefile.clang Kbuild updates for v6.5 2023-07-01 09:24:31 -07:00
Makefile.clean kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
Makefile.compiler kbuild: Add -Wa,--fatal-warnings to as-instr invocation 2024-02-16 16:07:07 -08:00
Makefile.debug kbuild: rust: use -Zdebuginfo-compression 2024-04-02 17:41:22 +02:00
Makefile.defconf kbuild: defconf: use SRCARCH to find merged configs 2024-01-28 01:13:37 +09:00
Makefile.dtbinst kbuild: Install dtb files as 0644 in Makefile.dtbinst 2024-06-26 00:18:57 +09:00
Makefile.extrawarn kbuild: enable -Wcast-function-type-strict unconditionally 2024-05-19 14:36:16 -07:00
Makefile.gcc-plugins gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file 2022-08-16 12:25:53 -07:00
Makefile.headersinst
Makefile.host kbuild: Use $(obj)/%.cc to fix host C++ module builds 2024-06-26 00:18:57 +09:00
Makefile.kasan kasan: remove hwasan-kernel-mem-intrinsic-prefix=1 for clang-14 2023-04-18 16:29:43 -07:00
Makefile.kcov
Makefile.kcsan
Makefile.kmsan kmsan: add KMSAN runtime core 2022-10-03 14:03:19 -07:00
Makefile.lib xz: fix comments and coding style 2024-09-01 20:43:24 -07:00
Makefile.modfinal kbuild: fix typos "prequisites" to "prerequisites" 2024-08-23 02:41:02 +09:00
Makefile.modinst kbuild: Use CRC32 and a 1MiB dictionary for XZ compressed modules 2023-09-25 16:01:05 +09:00
Makefile.modpost Kbuild updates for v6.10 2024-05-18 12:39:20 -07:00
Makefile.package kbuild: add script and target to generate pacman package 2024-07-22 01:24:22 +09:00
Makefile.randstruct randstruct: Enable Clang support 2022-05-08 01:33:07 -07:00
Makefile.ubsan ubsan: Reintroduce signed overflow sanitizer 2024-02-20 20:44:49 -08:00
Makefile.userprogs kbuild: support 'userldlibs' syntax 2023-11-01 23:26:01 +09:00
Makefile.vdsoinst more s390 updates for 6.10 merge window 2024-05-21 12:09:36 -07:00
Makefile.vmlinux kbuild: fix typos "prequisites" to "prerequisites" 2024-08-23 02:41:02 +09:00
Makefile.vmlinux_o kbuild: fix typos "prequisites" to "prerequisites" 2024-08-23 02:41:02 +09:00
makelst
markup_oops.pl
min-tool-version.sh rust: upgrade to Rust 1.78.0 2024-05-05 20:17:25 +02:00
misc-check kbuild: make W=1 warn files that are tracked but ignored by git 2023-01-22 23:43:33 +09:00
mkcompile_h Revert "kbuild: Make scripts/compile.h when sh != bash" 2022-09-29 04:40:15 +09:00
mksysmap kbuild: change scripts/mksysmap into sed script 2024-05-29 16:40:03 +09:00
mkuboot.sh
module.lds.S The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
modules-check.sh kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
nsdeps scripts/nsdeps: adjust to the format change of *.mod files 2022-06-08 20:14:13 +09:00
objdiff kbuild: clean .tmp_* pattern by make clean 2022-06-05 06:20:57 +09:00
objdump-func scripts/objdump-func: Support multiple functions 2023-04-14 16:08:28 +02:00
orc_hash.sh x86/unwind/orc: Add ELF section with ORC version identifier 2023-06-16 17:17:42 +02:00
pahole-version.sh
parse-maintainers.pl
patch-kernel
profile2linkerlist.pl
prune-kernel scripts/prune-kernel: Use kernel-install if available 2022-05-11 21:46:38 +09:00
recordmcount.c scripts: clean up IA-64 code 2023-12-03 18:51:48 +09:00
recordmcount.h
recordmcount.pl riscv: remove MCOUNT_NAME workaround 2024-02-22 15:38:54 -08:00
relocs_check.sh powerpc: Move script to check relocations at compile time in scripts/ 2023-04-19 07:46:31 -07:00
remove-stale-files kbuild: clean up scripts/remove-stale-files 2024-07-20 16:33:45 +09:00
rust_is_available.sh rust: warn about bindgen versions 0.66.0 and 0.66.1 2024-07-10 10:28:52 +02:00
rust_is_available_bindgen_0_66.h rust: warn about bindgen versions 0.66.0 and 0.66.1 2024-07-10 10:28:52 +02:00
rust_is_available_bindgen_libclang.h scripts: add rust_is_available.sh 2022-09-28 09:02:06 +02:00
rust_is_available_test.py rust: warn about bindgen versions 0.66.0 and 0.66.1 2024-07-10 10:28:52 +02:00
rustdoc_test_builder.rs rust: support running Rust documentation tests as KUnit ones 2023-07-19 09:32:53 -06:00
rustdoc_test_gen.rs rust: support running Rust documentation tests as KUnit ones 2023-07-19 09:32:53 -06:00
setlocalversion scripts/setlocalversion: also consider annotated tags of the form vx.y.z-${file_localversion} 2023-08-08 01:08:54 +09:00
show_delta scripts/show_delta: add __main__ judgement before main code 2023-10-18 14:43:23 -07:00
sign-file.c sign-file: Fix incorrect return values check 2023-12-13 12:55:11 -08:00
sorttable.c LoongArch: extable: Add type and data fields 2022-12-14 08:36:11 +08:00
sorttable.h x86,objtool: Split UNWIND_HINT_EMPTY in two 2023-03-23 23:18:58 +01:00
spdxcheck-test.sh docs: move Linux logo into a new images folder 2022-06-01 09:32:45 -06:00
spdxcheck.py scripts/spdxcheck: Add count of missing files to stats output 2024-05-04 19:00:54 +02:00
spdxexclude scripts/spdxcheck: Exclude top-level README 2022-05-18 15:35:42 +02:00
spelling.txt kernel-wide: fix spelling mistakes like "assocative" -> "associative" 2024-06-28 19:36:28 -07:00
sphinx-pre-install scripts: sphinx-pre-install: Add pyyaml hint to other distros 2024-04-02 10:07:51 -06:00
split-man.pl
stackdelta
stackusage
subarch.include LoongArch: Add build infrastructure 2022-06-03 20:09:27 +08:00
syscall.tbl syscalls: add back legacy __NR_nfsservctl macro 2024-08-06 08:57:02 +02:00
syscallhdr.sh
syscallnr.sh
syscalltbl.sh x86/syscall: Mark exit[_group] syscall handlers __noreturn 2024-06-28 15:23:38 +02:00
tags.sh scripts/tags.sh: remove find_sources 2024-01-04 17:01:15 +01:00
test_fortify.sh
tools-support-relr.sh Makefile: use -z pack-relative-relocs 2023-04-17 11:23:06 +09:00
unifdef.c scripts/unifdef: avoid constexpr keyword 2024-04-23 00:09:41 +09:00
ver_linux
xen-hypercalls.sh
xz_wrap.sh xz: adjust arch-specific options for better kernel compression 2024-09-01 20:43:27 -07:00