diff options
Diffstat (limited to 'usr/Kconfig')
| -rw-r--r-- | usr/Kconfig | 77 |
1 files changed, 36 insertions, 41 deletions
diff --git a/usr/Kconfig b/usr/Kconfig index d53112fdbf5a..9279a2893ab0 100644 --- a/usr/Kconfig +++ b/usr/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 # # Configuration for initramfs # @@ -17,7 +18,7 @@ config INITRAMFS_SOURCE When multiple directories and files are specified then the initramfs image will be the aggregate of all of them. - See <file:Documentation/early-userspace/README> for more details. + See <file:Documentation/driver-api/early-userspace/early_userspace_support.rst> for more details. If you are not sure, leave it blank. @@ -53,7 +54,6 @@ config INITRAMFS_ROOT_GID config RD_GZIP bool "Support initial ramdisk/ramfs compressed using gzip" - depends on BLK_DEV_INITRD default y select DECOMPRESS_GZIP help @@ -63,7 +63,6 @@ config RD_GZIP config RD_BZIP2 bool "Support initial ramdisk/ramfs compressed using bzip2" default y - depends on BLK_DEV_INITRD select DECOMPRESS_BZIP2 help Support loading of a bzip2 encoded initial ramdisk or cpio buffer @@ -72,7 +71,6 @@ config RD_BZIP2 config RD_LZMA bool "Support initial ramdisk/ramfs compressed using LZMA" default y - depends on BLK_DEV_INITRD select DECOMPRESS_LZMA help Support loading of a LZMA encoded initial ramdisk or cpio buffer @@ -80,7 +78,6 @@ config RD_LZMA config RD_XZ bool "Support initial ramdisk/ramfs compressed using XZ" - depends on BLK_DEV_INITRD default y select DECOMPRESS_XZ help @@ -90,7 +87,6 @@ config RD_XZ config RD_LZO bool "Support initial ramdisk/ramfs compressed using LZO" default y - depends on BLK_DEV_INITRD select DECOMPRESS_LZO help Support loading of a LZO encoded initial ramdisk or cpio buffer @@ -99,16 +95,22 @@ config RD_LZO config RD_LZ4 bool "Support initial ramdisk/ramfs compressed using LZ4" default y - depends on BLK_DEV_INITRD select DECOMPRESS_LZ4 help Support loading of a LZ4 encoded initial ramdisk or cpio buffer If unsure, say N. +config RD_ZSTD + bool "Support initial ramdisk/ramfs compressed using ZSTD" + default y + select DECOMPRESS_ZSTD + help + Support loading of a ZSTD encoded initial ramdisk or cpio buffer. + If unsure, say N. + choice prompt "Built-in initramfs compression mode" - depends on INITRAMFS_SOURCE!="" - optional + depends on INITRAMFS_SOURCE != "" help This option allows you to decide by which algorithm the builtin initramfs will be compressed. Several compression algorithms are @@ -130,17 +132,6 @@ choice If in doubt, select 'None' -config INITRAMFS_COMPRESSION_NONE - bool "None" - help - Do not compress the built-in initramfs at all. This may sound wasteful - in space, but, you should be aware that the built-in initramfs will be - compressed at a later stage anyways along with the rest of the kernel, - on those architectures that support this. However, not compressing the - initramfs may lead to slightly higher memory consumption during a - short time at boot, while both the cpio image and the unpacked - filesystem image will be present in memory simultaneously - config INITRAMFS_COMPRESSION_GZIP bool "Gzip" depends on RD_GZIP @@ -194,9 +185,9 @@ config INITRAMFS_COMPRESSION_LZO bool "LZO" depends on RD_LZO help - It's compression ratio is the second poorest amongst the choices. The - kernel size is about 10% bigger than gzip. Despite that, it's - decompression speed is the second fastest and it's compression speed + Its compression ratio is the second poorest amongst the choices. The + kernel size is about 10% bigger than gzip. Despite that, its + decompression speed is the second fastest and its compression speed is quite fast too. If you choose this, keep in mind that you may need to install the lzop @@ -213,22 +204,26 @@ config INITRAMFS_COMPRESSION_LZ4 If you choose this, keep in mind that most distros don't provide lz4 by default which could cause a build failure. -endchoice +config INITRAMFS_COMPRESSION_ZSTD + bool "ZSTD" + depends on RD_ZSTD + help + ZSTD is a compression algorithm targeting intermediate compression + with fast decompression speed. It will compress better than GZIP and + decompress around the same speed as LZO, but slower than LZ4. -config INITRAMFS_COMPRESSION - depends on INITRAMFS_SOURCE!="" - string - default "" if INITRAMFS_COMPRESSION_NONE - default ".gz" if INITRAMFS_COMPRESSION_GZIP - default ".bz2" if INITRAMFS_COMPRESSION_BZIP2 - default ".lzma" if INITRAMFS_COMPRESSION_LZMA - default ".xz" if INITRAMFS_COMPRESSION_XZ - default ".lzo" if INITRAMFS_COMPRESSION_LZO - default ".lz4" if INITRAMFS_COMPRESSION_LZ4 - default ".gz" if RD_GZIP - default ".lz4" if RD_LZ4 - default ".lzo" if RD_LZO - default ".xz" if RD_XZ - default ".lzma" if RD_LZMA - default ".bz2" if RD_BZIP2 - default "" + If you choose this, keep in mind that you may need to install the zstd + tool to be able to compress the initram. + +config INITRAMFS_COMPRESSION_NONE + bool "None" + help + Do not compress the built-in initramfs at all. This may sound wasteful + in space, but, you should be aware that the built-in initramfs will be + compressed at a later stage anyways along with the rest of the kernel, + on those architectures that support this. However, not compressing the + initramfs may lead to slightly higher memory consumption during a + short time at boot, while both the cpio image and the unpacked + filesystem image will be present in memory simultaneously + +endchoice |