linux-6.12.1/lib/Kconfig

1 # SPDX-License-Identifier: GPL-2.0-only
15 	bool "Automatically choose fastest RAID6 PQ functions"
19 	  Benchmark all available RAID6 PQ functions on init and choose the
31 	  converting bitfields between a CPU-usable representation and a
33 	    - Is little endian (bytes are reversed within a 32-bit group)
34 	    - The least-significant 32-bit word comes first (within a 64-bit
36 	    - The most significant bit of a byte is at its right (bit 0 of a
39 	  in the data sheets of the peripherals they are in control of.
41 	  When in doubt, say N.
50 	  This option enables the use of hardware bit-reversal instructions on
90 	bool "Access I/O in non-MMIO mode"
95 	  hosts which can not be accessed in MMIO mode. Using the logical PIO
96 	  mechanism, the host-local I/O resource can be mapped into system
98 	  system can access the I/O devices with the mapped-logic PIO through
104 	  When in doubt, say N.
130 	tristate "CRC-CCITT functions"
132 	  This option is provided for the case where no in-kernel-tree
133 	  modules require CRC-CCITT functions, but a module built outside
134 	  the kernel tree does. Such modules that use library CRC-CCITT
135 	  functions require M here.
138 	tristate "CRC16 functions"
140 	  This option is provided for the case where no in-kernel-tree
141 	  modules require CRC16 functions, but a module built outside
143 	  functions require M here.
150 	  This option is only needed if a module that's not in the
164 	tristate "CRC ITU-T V.41 functions"
166 	  This option is provided for the case where no in-kernel-tree
167 	  modules require CRC ITU-T V.41 functions, but a module built outside
168 	  the kernel tree does. Such modules that use library CRC ITU-T V.41
169 	  functions require M here.
172 	tristate "CRC32/CRC32c functions"
176 	  This option is provided for the case where no in-kernel-tree
177 	  modules require CRC32/CRC32c functions, but a module built outside
179 	  functions require M here.
185 	  This option enables the CRC32 library functions to perform a
238 	tristate "CRC64 functions"
240 	  This option is provided for the case where no in-kernel-tree
241 	  modules require CRC64 functions, but a module built outside
243 	  functions require M here.
246 	tristate "CRC4 functions"
248 	  This option is provided for the case where no in-kernel-tree
249 	  modules require CRC4 functions, but a module built outside
251 	  functions require M here.
254 	tristate "CRC7 functions"
256 	  This option is provided for the case where no in-kernel-tree
257 	  modules require CRC7 functions, but a module built outside
259 	  functions require M here.
262 	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
266 	  This option is provided for the case where no in-kernel-tree
267 	  modules require CRC32c functions, but a module built outside the
268 	  kernel tree does. Such modules that use library CRC32c functions
299 	  This option enables the 32 bit PRNG library functions to perform a
325 	 Enable s390x hardware support for zlib in the kernel.
439 	  that (k + m*t) <= 2**m - 1.
446 	  Constant value for error correction capability in bits 't'.
471 	  Simple, embeddable, interval-tree. Can find the start of an
472 	  overlapping range in log(n) time and then iterate over all
478 		Documentation/core-api/rbtree.rst
489 	  Support entries which occupy multiple consecutive indices in the
497 	  modify.  The algorithms are non-recursive, and the trees are highly
502 		Documentation/core-api/assoc_array.rst
554 #	is ridiculous for the amount of code involved.	Until an out-of-tree
556 #	when required.  Since we're ignoring out-of-tree users,	there's also
561 	  simple text pattern matching.  It originated in the ATA code
565 	  All drivers in the Linux kernel tree that require this function
567 	  are compiling an out-of tree driver which tells you that it
571 	tristate "glob self-test on init"
574 	  This option enables a simple self-test of the glob_match
590 # Generic 64-bit atomic support is selected if needed
694 # memory-read error like x86 machine-check or ARM data-abort, and
696 # 'bytes-transferred' if that exception fires when accessing the source
718 	int "Maximum number of frames in trace saved in stack depot"
738 	bool "Boot-time test for lwq queuing"
740           Run boot-time test of light-weight queuing.