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 9if XZ_DEC 10 11config XZ_DEC_X86 12 bool "x86 BCJ filter decoder" 13 default y if X86 14 select XZ_DEC_BCJ 15 16config XZ_DEC_POWERPC 17 bool "PowerPC BCJ filter decoder" 18 default y if PPC 19 select XZ_DEC_BCJ 20 21config XZ_DEC_IA64 22 bool "IA-64 BCJ filter decoder" 23 default y if IA64 24 select XZ_DEC_BCJ 25 26config XZ_DEC_ARM 27 bool "ARM BCJ filter decoder" 28 default y if ARM 29 select XZ_DEC_BCJ 30 31config XZ_DEC_ARMTHUMB 32 bool "ARM-Thumb BCJ filter decoder" 33 default y if (ARM && ARM_THUMB) 34 select XZ_DEC_BCJ 35 36config XZ_DEC_SPARC 37 bool "SPARC BCJ filter decoder" 38 default y if SPARC 39 select XZ_DEC_BCJ 40 41config 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 54endif 55 56config XZ_DEC_BCJ 57 bool 58 default n 59 60config 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. 71