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kbuild: add support for zstd compressed modules

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kmod 28 supports modules compressed in zstd format so let's add this
possibility to kernel.

Signed-off-by: Piotr Gorski <lucjan.lucjanov@gmail.com>
Reviewed-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Piotr Gorski 2021-04-07 18:09:27 +02:00 committed by Masahiro Yamada
parent d4bbe94209
commit c3d7ef377e
2 changed files with 13 additions and 1 deletions
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8
init/Kconfig
View File

@ -2242,7 +2242,7 @@ choice
Please note that the tool used to load modules needs to support the
corresponding algorithm. module-init-tools MAY support gzip, and kmod
MAY support gzip and xz.
MAY support gzip, xz and zstd.
Your build system needs to provide the appropriate compression tool
to compress the modules.
@ -2267,6 +2267,12 @@ config MODULE_COMPRESS_XZ
Compress modules with XZ. The installed modules are suffixed
with .ko.xz.
config MODULE_COMPRESS_ZSTD
bool "ZSTD"
help
Compress modules with ZSTD. The installed modules are suffixed
with .ko.zst.
endchoice
config MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS

6
scripts/Makefile.modinst
View File

@ -21,6 +21,7 @@ endif
suffix-y :=
suffix-$(CONFIG_MODULE_COMPRESS_GZIP) := .gz
suffix-$(CONFIG_MODULE_COMPRESS_XZ) := .xz
suffix-$(CONFIG_MODULE_COMPRESS_ZSTD) := .zst
modules := $(patsubst $(extmod_prefix)%, $(dst)/%$(suffix-y), $(modules))
@ -95,6 +96,8 @@ quiet_cmd_gzip = GZIP $@
cmd_gzip = $(KGZIP) -n -f $<
quiet_cmd_xz = XZ $@
cmd_xz = $(XZ) --lzma2=dict=2MiB -f $<
quiet_cmd_zstd = ZSTD $@
cmd_zstd = $(ZSTD) -T0 --rm -f -q $<
$(dst)/%.ko.gz: $(dst)/%.ko FORCE
$(call cmd,gzip)
@ -102,6 +105,9 @@ $(dst)/%.ko.gz: $(dst)/%.ko FORCE
$(dst)/%.ko.xz: $(dst)/%.ko FORCE
$(call cmd,xz)
$(dst)/%.ko.zst: $(dst)/%.ko FORCE
$(call cmd,zstd)
PHONY += FORCE
FORCE: