1 config XZ_DEC
2 tristate "XZ decompression support"
3 select CRC32
4 help
5 LZMA2 compression algorithm and BCJ filters are supported using
6 the .xz file format as the container. For integrity checking,
7 CRC32 is supported. See Documentation/xz.txt for more information.
8
9 if XZ_DEC
10
11 config XZ_DEC_X86
12 bool "x86 BCJ filter decoder"
13 default y if X86
14 select XZ_DEC_BCJ
15
16 config XZ_DEC_POWERPC
17 bool "PowerPC BCJ filter decoder"
18 default y if PPC
19 select XZ_DEC_BCJ
20
21 config XZ_DEC_IA64
22 bool "IA-64 BCJ filter decoder"
23 default y if IA64
24 select XZ_DEC_BCJ
25
26 config XZ_DEC_ARM
27 bool "ARM BCJ filter decoder"
28 default y if ARM
29 select XZ_DEC_BCJ
30
31 config XZ_DEC_ARMTHUMB
32 bool "ARM-Thumb BCJ filter decoder"
33 default y if (ARM && ARM_THUMB)
34 select XZ_DEC_BCJ
35
36 config XZ_DEC_SPARC
37 bool "SPARC BCJ filter decoder"
38 default y if SPARC
39 select XZ_DEC_BCJ
40
41 config XZ_DEC_MICROLZMA
42 bool "MicroLZMA decoder"
43 default n
44 help
45 MicroLZMA is a header format variant where the first byte
46 of a raw LZMA stream (without the end of stream marker) has
47 been replaced with a bitwise-negation of the lc/lp/pb
48 properties byte. MicroLZMA was created to be used in EROFS
49 but can be used by other things too where wasting minimal
50 amount of space for headers is important.
51
52 Unless you know that you need this, say N.
53
54 endif
55
56 config XZ_DEC_BCJ
57 bool
58 default n
59
60 config XZ_DEC_TEST
61 tristate "XZ decompressor tester"
62 default n
63 depends on XZ_DEC
64 help
65 This allows passing .xz files to the in-kernel XZ decoder via
66 a character special file. It calculates CRC32 of the decompressed
67 data and writes diagnostics to the system log.
68
69 Unless you are developing the XZ decoder, you don't need this
70 and should say N.
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