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- # SPDX-License-Identifier: GPL-2.0-only
- config XZ_DEC
- tristate "XZ decompression support"
- select CRC32
- help
- LZMA2 compression algorithm and BCJ filters are supported using
- the .xz file format as the container. For integrity checking,
- CRC32 is supported. See Documentation/staging/xz.rst for more information.
- if XZ_DEC
- config XZ_DEC_X86
- bool "x86 BCJ filter decoder" if EXPERT
- default y
- select XZ_DEC_BCJ
- config XZ_DEC_POWERPC
- bool "PowerPC BCJ filter decoder" if EXPERT
- default y
- select XZ_DEC_BCJ
- config XZ_DEC_IA64
- bool "IA-64 BCJ filter decoder" if EXPERT
- default y
- select XZ_DEC_BCJ
- config XZ_DEC_ARM
- bool "ARM BCJ filter decoder" if EXPERT
- default y
- select XZ_DEC_BCJ
- config XZ_DEC_ARMTHUMB
- bool "ARM-Thumb BCJ filter decoder" if EXPERT
- default y
- select XZ_DEC_BCJ
- config XZ_DEC_SPARC
- bool "SPARC BCJ filter decoder" if EXPERT
- default y
- select XZ_DEC_BCJ
- config XZ_DEC_MICROLZMA
- bool "MicroLZMA decoder"
- default n
- help
- MicroLZMA is a header format variant where the first byte
- of a raw LZMA stream (without the end of stream marker) has
- been replaced with a bitwise-negation of the lc/lp/pb
- properties byte. MicroLZMA was created to be used in EROFS
- but can be used by other things too where wasting minimal
- amount of space for headers is important.
- Unless you know that you need this, say N.
- endif
- config XZ_DEC_BCJ
- bool
- default n
- config XZ_DEC_TEST
- tristate "XZ decompressor tester"
- default n
- depends on XZ_DEC
- help
- This allows passing .xz files to the in-kernel XZ decoder via
- a character special file. It calculates CRC32 of the decompressed
- data and writes diagnostics to the system log.
- Unless you are developing the XZ decoder, you don't need this
- and should say N.
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