# SPDX-License-Identifier: GPL-2.0-only## Library configuration# config BINARY_PRINTF	def_bool n menu "Library routines" config LINEAR_RANGES	tristate config PACKING	bool "Generic bitfield packing and unpacking"	select BITREVERSE	default n	help	  This option provides the packing() helper function, which permits	  converting bitfields between a CPU-usable representation and a	  memory representation that can have any combination of these quirks:	    - Is little endian (bytes are reversed within a 32-bit group)	    - The least-significant 32-bit word comes first (within a 64-bit	      group)	    - The most significant bit of a byte is at its right (bit 0 of a	      register description is numerically 2^7).	  Drivers may use these helpers to match the bit indices as described	  in the data sheets of the peripherals they are in control of. 	  When in doubt, say N. config PACKING_KUNIT_TEST	tristate "KUnit tests for packing library" if !KUNIT_ALL_TESTS	depends on PACKING && KUNIT	default KUNIT_ALL_TESTS	help	  This builds KUnit tests for the packing library. 	  For more information on KUnit and unit tests in general,	  please refer to the KUnit documentation in Documentation/dev-tools/kunit/. 	  When in doubt, say N. config BITREVERSE	tristate	select GENERIC_BITREVERSE if !HAVE_ARCH_BITREVERSE config HAVE_ARCH_BITREVERSE	bool	default n	depends on BITREVERSE	help	  This option enables the use of hardware bit-reversal instructions on	  architectures which support such operations. config GENERIC_BITREVERSE	tristate	depends on BITREVERSE	help	  Generic bit reversal implementation. Drivers should never enable	  it explicitly. Instead, enable BITREVERSE. 	  Architectures may want to select it as a fall-back option for	  HAVE_ARCH_BITREVERSE, when the hardware-accelerated bit reverse	  instruction set is optional, like RISC-V ZBKB extension. config ARCH_HAS_STRNCPY_FROM_USER	bool config ARCH_HAS_STRNLEN_USER	bool config GENERIC_STRNCPY_FROM_USER	def_bool !ARCH_HAS_STRNCPY_FROM_USER config GENERIC_STRNLEN_USER	def_bool !ARCH_HAS_STRNLEN_USER config GENERIC_NET_UTILS	bool source "lib/math/Kconfig" config NO_GENERIC_PCI_IOPORT_MAP	bool config GENERIC_IOMAP	bool	select GENERIC_PCI_IOMAP config STMP_DEVICE	bool config ARCH_USE_CMPXCHG_LOCKREF	bool config ARCH_HAS_FAST_MULTIPLIER	bool config ARCH_USE_SYM_ANNOTATIONS	bool config INDIRECT_PIO	bool "Access I/O in non-MMIO mode"	depends on ARM64	depends on HAS_IOPORT	help	  On some platforms where no separate I/O space exists, there are I/O	  hosts which can not be accessed in MMIO mode. Using the logical PIO	  mechanism, the host-local I/O resource can be mapped into system	  logic PIO space shared with MMIO hosts, such as PCI/PCIe, then the	  system can access the I/O devices with the mapped-logic PIO through	  I/O accessors. 	  This way has relatively little I/O performance cost. Please make	  sure your devices really need this configure item enabled. 	  When in doubt, say N. config INDIRECT_IOMEM	bool	help	  This is selected by other options/architectures to provide the	  emulated iomem accessors. config INDIRECT_IOMEM_FALLBACK	bool	depends on INDIRECT_IOMEM	help	  If INDIRECT_IOMEM is selected, this enables falling back to plain	  mmio accesses when the IO memory address is not a registered	  emulated region. config TRACE_MMIO_ACCESS	bool "Register read/write tracing"	depends on TRACING && ARCH_HAVE_TRACE_MMIO_ACCESS	help	  Create tracepoints for MMIO read/write operations. These trace events	  can be used for logging all MMIO read/write operations. source "lib/crc/Kconfig"source "lib/crypto/Kconfig"source "lib/raid/Kconfig" config XXHASH	tristate config AUDIT_GENERIC	bool	depends on AUDIT && !AUDIT_ARCH	default y config AUDIT_ARCH_COMPAT_GENERIC	bool	default n config AUDIT_COMPAT_GENERIC	bool	depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT	default y ## compression support is select'ed if needed#config 842_COMPRESS	select CRC32	tristate config 842_DECOMPRESS	select CRC32	tristate config ZLIB_INFLATE	tristate config ZLIB_DEFLATE	tristate	select BITREVERSE config ZLIB_DFLTCC	def_bool y	depends on S390	prompt "Enable s390x DEFLATE CONVERSION CALL support for kernel zlib"	help	 Enable s390x hardware support for zlib in the kernel. config LZO_COMPRESS	tristate config LZO_DECOMPRESS	tristate config LZ4_COMPRESS	tristate config LZ4HC_COMPRESS	tristate config LZ4_DECOMPRESS	tristate config ZSTD_COMMON	select XXHASH	tristate config ZSTD_COMPRESS	select ZSTD_COMMON	tristate config ZSTD_DECOMPRESS	select ZSTD_COMMON	tristate source "lib/xz/Kconfig" ## These all provide a common interface (hence the apparent duplication with# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)#config DECOMPRESS_GZIP	select ZLIB_INFLATE	tristate config DECOMPRESS_BZIP2	tristate config DECOMPRESS_LZMA	tristate config DECOMPRESS_XZ	select XZ_DEC	tristate config DECOMPRESS_LZO	select LZO_DECOMPRESS	tristate config DECOMPRESS_LZ4	select LZ4_DECOMPRESS	tristate config DECOMPRESS_ZSTD	select ZSTD_DECOMPRESS	tristate ## Generic allocator support is selected if needed#config GENERIC_ALLOCATOR	bool ## reed solomon support is select'ed if needed#config REED_SOLOMON	tristate	config REED_SOLOMON_ENC8	bool config REED_SOLOMON_DEC8	bool config REED_SOLOMON_ENC16	bool config REED_SOLOMON_DEC16	bool ## BCH support is selected if needed#config BCH	tristate	select BITREVERSE config BCH_CONST_PARAMS	bool	help	  Drivers may select this option to force specific constant	  values for parameters 'm' (Galois field order) and 't'	  (error correction capability). Those specific values must	  be set by declaring default values for symbols BCH_CONST_M	  and BCH_CONST_T.	  Doing so will enable extra compiler optimizations,	  improving encoding and decoding performance up to 2x for	  usual (m,t) values (typically such that m*t < 200).	  When this option is selected, the BCH library supports	  only a single (m,t) configuration. This is mainly useful	  for NAND flash board drivers requiring known, fixed BCH	  parameters. config BCH_CONST_M	int	range 5 15	help	  Constant value for Galois field order 'm'. If 'k' is the	  number of data bits to protect, 'm' should be chosen such	  that (k + m*t) <= 2**m - 1.	  Drivers should declare a default value for this symbol if	  they select option BCH_CONST_PARAMS. config BCH_CONST_T	int	help	  Constant value for error correction capability in bits 't'.	  Drivers should declare a default value for this symbol if	  they select option BCH_CONST_PARAMS. ## Textsearch support is select'ed if needed#config TEXTSEARCH	bool config TEXTSEARCH_KMP	tristate config TEXTSEARCH_BM	tristate config TEXTSEARCH_FSM	tristate config BTREE	bool config INTERVAL_TREE	bool	help	  Simple, embeddable, interval-tree. Can find the start of an	  overlapping range in log(n) time and then iterate over all	  overlapping nodes. The algorithm is implemented as an	  augmented rbtree. 	  See: 		Documentation/core-api/rbtree.rst 	  for more information. config INTERVAL_TREE_SPAN_ITER	bool	depends on INTERVAL_TREE config XARRAY_MULTI	bool	help	  Support entries which occupy multiple consecutive indices in the	  XArray. config ASSOCIATIVE_ARRAY	bool	help	  Generic associative array.  Can be searched and iterated over whilst	  it is being modified.  It is also reasonably quick to search and	  modify.  The algorithms are non-recursive, and the trees are highly	  capacious. 	  See: 		Documentation/core-api/assoc_array.rst 	  for more information. config CLOSURES	bool config HAS_IOMEM	bool	depends on !NO_IOMEM	default y config HAS_IOPORT	bool config HAS_IOPORT_MAP	bool	depends on HAS_IOMEM && !NO_IOPORT_MAP	default y source "kernel/dma/Kconfig" config SGL_ALLOC	bool	default n config IOMMU_HELPER	bool config CHECK_SIGNATURE	bool config CPUMASK_OFFSTACK	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS	help	  Use dynamic allocation for cpumask_var_t, instead of putting	  them on the stack.  This is a bit more expensive, but avoids	  stack overflow. config FORCE_NR_CPUS	def_bool !SMP config CPU_RMAP	bool	depends on SMP config DQL	bool config GLOB	bool#	This actually supports modular compilation, but the module overhead#	is ridiculous for the amount of code involved.	Until an out-of-tree#	driver asks for it, we'll just link it directly it into the kernel#	when required.  Since we're ignoring out-of-tree users,	there's also#	no need bother prompting for a manual decision:#	prompt "glob_match() function"	help	  This option provides a glob_match function for performing	  simple text pattern matching.  It originated in the ATA code	  to blacklist particular drive models, but other device drivers	  may need similar functionality. 	  All drivers in the Linux kernel tree that require this function	  should automatically select this option.  Say N unless you	  are compiling an out-of tree driver which tells you that it	  depends on this. ## Netlink attribute parsing support is select'ed if needed#config NLATTR	bool ## Generic 64-bit atomic support is selected if needed#config GENERIC_ATOMIC64       bool config LRU_CACHE	tristate config CLZ_TAB	bool config IRQ_POLL	bool "IRQ polling library"	help	  Helper library to poll interrupt mitigation using polling. config MPILIB	tristate	select CLZ_TAB	help	  Multiprecision maths library from GnuPG.	  It is used to implement RSA digital signature verification,	  which is used by IMA/EVM digital signature extension. config SIGNATURE	tristate	depends on KEYS	select CRYPTO_LIB_SHA1	select MPILIB	help	  Digital signature verification. Currently only RSA is supported.	  Implementation is done using GnuPG MPI library config DIMLIB	tristate	depends on NET	help	  Dynamic Interrupt Moderation library.	  Implements an algorithm for dynamically changing CQ moderation values	  according to run time performance. ## libfdt files, only selected if needed.#config LIBFDT	bool config OID_REGISTRY	tristate	help	  Enable fast lookup object identifier registry. config UCS2_STRING	tristate ## generic vdso#source "lib/vdso/Kconfig" source "lib/fonts/Kconfig" config SG_SPLIT	def_bool n

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