1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "XZ decompression support"
6 LZMA2 compression algorithm and BCJ filters are supported using
7 the .xz file format as the container. For integrity checking,
8 CRC32 is supported. See Documentation/staging/xz.rst for more information.
13 bool "x86 BCJ filter decoder" if EXPERT
18 bool "PowerPC BCJ filter decoder" if EXPERT
23 bool "IA-64 BCJ filter decoder" if EXPERT
28 bool "ARM BCJ filter decoder" if EXPERT
32 config XZ_DEC_ARMTHUMB
33 bool "ARM-Thumb BCJ filter decoder" if EXPERT
38 bool "SPARC BCJ filter decoder" if EXPERT
42 config XZ_DEC_MICROLZMA
43 bool "MicroLZMA decoder"
46 MicroLZMA is a header format variant where the first byte
47 of a raw LZMA stream (without the end of stream marker) has
48 been replaced with a bitwise-negation of the lc/lp/pb
49 properties byte. MicroLZMA was created to be used in EROFS
50 but can be used by other things too where wasting minimal
51 amount of space for headers is important.
53 Unless you know that you need this, say N.
62 tristate "XZ decompressor tester"
66 This allows passing .xz files to the in-kernel XZ decoder via
67 a character special file. It calculates CRC32 of the decompressed
68 data and writes diagnostics to the system log.
70 Unless you are developing the XZ decoder, you don't need this