1# SPDX-License-Identifier: GPL-2.0-only
 2config XZ_DEC
 3	tristate "XZ decompression support"
 4	select CRC32
 5	help
 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
 9	  information.
10
11if XZ_DEC
12
13config XZ_DEC_X86
14	bool "x86 BCJ filter decoder" if EXPERT
15	default y
 
16	select XZ_DEC_BCJ
17
18config XZ_DEC_POWERPC
19	bool "PowerPC BCJ filter decoder" if EXPERT
20	default y
 
 
 
 
 
 
 
21	select XZ_DEC_BCJ
22
23config XZ_DEC_ARM
24	bool "ARM BCJ filter decoder" if EXPERT
25	default y
 
26	select XZ_DEC_BCJ
27
28config XZ_DEC_ARMTHUMB
29	bool "ARM-Thumb BCJ filter decoder" if EXPERT
30	default y
31	select XZ_DEC_BCJ
32
33config XZ_DEC_ARM64
34	bool "ARM64 BCJ filter decoder" if EXPERT
35	default y
36	select XZ_DEC_BCJ
37
38config XZ_DEC_SPARC
39	bool "SPARC BCJ filter decoder" if EXPERT
40	default y
 
41	select XZ_DEC_BCJ
42
43config XZ_DEC_RISCV
44	bool "RISC-V BCJ filter decoder" if EXPERT
45	default y
46	select XZ_DEC_BCJ
47
48config XZ_DEC_MICROLZMA
49	bool "MicroLZMA decoder"
50	default n
51	help
52	  MicroLZMA is a header format variant where the first byte
53	  of a raw LZMA stream (without the end of stream marker) has
54	  been replaced with a bitwise-negation of the lc/lp/pb
55	  properties byte. MicroLZMA was created to be used in EROFS
56	  but can be used by other things too where wasting minimal
57	  amount of space for headers is important.
58
59	  Unless you know that you need this, say N.
60
61endif
62
63config XZ_DEC_BCJ
64	bool
65	default n
66
67config XZ_DEC_TEST
68	tristate "XZ decompressor tester"
69	default n
70	depends on XZ_DEC
71	help
72	  This allows passing .xz files to the in-kernel XZ decoder via
73	  a character special file. It calculates CRC32 of the decompressed
74	  data and writes diagnostics to the system log.
75
76	  Unless you are developing the XZ decoder, you don't need this
77	  and should say N.

 
 1config 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
 9config XZ_DEC_X86
10	bool "x86 BCJ filter decoder" if EXPERT
11	default y
12	depends on XZ_DEC
13	select XZ_DEC_BCJ
14
15config XZ_DEC_POWERPC
16	bool "PowerPC BCJ filter decoder" if EXPERT
17	default y
18	depends on XZ_DEC
19	select XZ_DEC_BCJ
20
21config XZ_DEC_IA64
22	bool "IA-64 BCJ filter decoder" if EXPERT
23	default y
24	depends on XZ_DEC
25	select XZ_DEC_BCJ
26
27config XZ_DEC_ARM
28	bool "ARM BCJ filter decoder" if EXPERT
29	default y
30	depends on XZ_DEC
31	select XZ_DEC_BCJ
32
33config XZ_DEC_ARMTHUMB
34	bool "ARM-Thumb BCJ filter decoder" if EXPERT
35	default y
36	depends on XZ_DEC
 
 
 
 
37	select XZ_DEC_BCJ
38
39config XZ_DEC_SPARC
40	bool "SPARC BCJ filter decoder" if EXPERT
41	default y
42	depends on XZ_DEC
43	select XZ_DEC_BCJ
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
44
45config XZ_DEC_BCJ
46	bool
47	default n
48
49config XZ_DEC_TEST
50	tristate "XZ decompressor tester"
51	default n
52	depends on XZ_DEC
53	help
54	  This allows passing .xz files to the in-kernel XZ decoder via
55	  a character special file. It calculates CRC32 of the decompressed
56	  data and writes diagnostics to the system log.
57
58	  Unless you are developing the XZ decoder, you don't need this
59	  and should say N.