linux-6.12.1/lib/Kconfig

1 # SPDX-License-Identifier: GPL-2.0-only
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
38 	  Drivers may use these helpers to match the bit indices as described
50 	  This option enables the use of hardware bit-reversal instructions on
90 	bool "Access I/O in non-MMIO mode"
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
109 	  This is selected by other options/architectures to provide the
116 	  If INDIRECT_IOMEM is selected, this enables falling back to plain
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
140 	  This option is provided for the case where no in-kernel-tree
151 	  kernel tree needs to calculate CRC checks for use with the
160 	  This option provides a CRC64 API to a registered crypto driver.
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
176 	  This option is provided for the case where no in-kernel-tree
185 	  This option enables the CRC32 library functions to perform a
195 	  This option allows a kernel builder to override the default choice
204 	  Most modern processors have enough cache to hold this table without
208 	  you have a good reason not to.
240 	  This option is provided for the case where no in-kernel-tree
248 	  This option is provided for the case where no in-kernel-tree
256 	  This option is provided for the case where no in-kernel-tree
262 	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
266 	  This option is provided for the case where no in-kernel-tree
276 	  when they need to do cyclic redundancy check according CRC8
299 	  This option enables the 32 bit PRNG library functions to perform a
420 	  Drivers may select this option to force specific constant
426 	  improving encoding and decoding performance up to 2x for
438 	  number of data bits to protect, 'm' should be chosen such
439 	  that (k + m*t) <= 2**m - 1.
471 	  Simple, embeddable, interval-tree. Can find the start of an
478 		Documentation/core-api/rbtree.rst
496 	  it is being modified.  It is also reasonably quick to search and
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
562 	  to blacklist particular drive models, but other device drivers
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
576 	  working on the code to ensure they haven't introduced any
580 	  module load) by a small amount, so you're welcome to play with
590 # Generic 64-bit atomic support is selected if needed
604 	  Helper library to poll interrupt mitigation using polling.
611 	  It is used to implement RSA digital signature verification,
612 	  which is used by IMA/EVM digital signature extension.
621 	  Digital signature verification. Currently only RSA is supported.
630 	  according to run time performance.
656 	 Provides a helper to split scatterlists into chunks, each chunk being
658 	 whishes to split a scatterlist amongst multiple DMA channels.
663 	 Provides a helper to allocate chained scatterlists. This should be
664 	 selected by a driver or an API which whishes to allocate chained
686 # use memcpy to implement user copies for nommu architectures
693 # arch has a concept of a recoverable synchronous exception due to a
694 # memory-read error like x86 machine-check or ARM data-abort, and
695 # implements copy_mc_to_{user,kernel} to abort and report
696 # 'bytes-transferred' if that exception fires when accessing the source
738 	bool "Boot-time test for lwq queuing"
740           Run boot-time test of light-weight queuing.