Kconfig 20 KB

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  1. menu "Library routines"
  2. config ADDR_MAP
  3. bool "Enable support for non-identity virtual-physical mappings"
  4. help
  5. Enables helper code for implementing non-identity virtual-physical
  6. memory mappings for 32bit CPUs.
  7. config SYS_NUM_ADDR_MAP
  8. int "Size of the address-map table"
  9. depends on ADDR_MAP
  10. default 16
  11. help
  12. Sets the number of entries in the virtual-physical mapping table.
  13. config BCH
  14. bool "Enable Software based BCH ECC"
  15. help
  16. Enables software based BCH ECC algorithm present in lib/bch.c
  17. This is used by SoC platforms which do not have built-in ELM
  18. hardware engine required for BCH ECC correction.
  19. config BINMAN_FDT
  20. bool "Allow access to binman information in the device tree"
  21. depends on BINMAN && OF_CONTROL
  22. default y
  23. help
  24. This enables U-Boot to access information about binman entries,
  25. stored in the device tree in a binman node. Typical uses are to
  26. locate entries in the firmware image. See binman.h for the available
  27. functionality.
  28. config CC_OPTIMIZE_LIBS_FOR_SPEED
  29. bool "Optimize libraries for speed"
  30. help
  31. Enabling this option will pass "-O2" to gcc when compiling
  32. under "lib" directory.
  33. If unsure, say N.
  34. config DYNAMIC_CRC_TABLE
  35. bool "Enable Dynamic tables for CRC"
  36. help
  37. Enable this option to calculate entries for CRC tables at runtime.
  38. This can be helpful when reducing the size of the build image
  39. config HAVE_ARCH_IOMAP
  40. bool
  41. help
  42. Enable this option if architecture provides io{read,write}{8,16,32}
  43. I/O accessor functions.
  44. config HAVE_PRIVATE_LIBGCC
  45. bool
  46. config LIB_UUID
  47. bool
  48. config PRINTF
  49. bool
  50. default y
  51. config SPL_PRINTF
  52. bool
  53. select SPL_SPRINTF
  54. select SPL_STRTO if !SPL_USE_TINY_PRINTF
  55. config TPL_PRINTF
  56. bool
  57. select TPL_SPRINTF
  58. select TPL_STRTO if !TPL_USE_TINY_PRINTF
  59. config SPRINTF
  60. bool
  61. default y
  62. config SPL_SPRINTF
  63. bool
  64. config TPL_SPRINTF
  65. bool
  66. config SSCANF
  67. bool
  68. default n
  69. config STRTO
  70. bool
  71. default y
  72. config SPL_STRTO
  73. bool
  74. config TPL_STRTO
  75. bool
  76. config IMAGE_SPARSE
  77. bool
  78. config IMAGE_SPARSE_FILLBUF_SIZE
  79. hex "Android sparse image CHUNK_TYPE_FILL buffer size"
  80. default 0x80000
  81. depends on IMAGE_SPARSE
  82. help
  83. Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
  84. chunks.
  85. config USE_PRIVATE_LIBGCC
  86. bool "Use private libgcc"
  87. depends on HAVE_PRIVATE_LIBGCC
  88. default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
  89. help
  90. This option allows you to use the built-in libgcc implementation
  91. of U-Boot instead of the one provided by the compiler.
  92. If unsure, say N.
  93. config SYS_HZ
  94. int
  95. default 1000
  96. help
  97. The frequency of the timer returned by get_timer().
  98. get_timer() must operate in milliseconds and this option must be
  99. set to 1000.
  100. config SPL_USE_TINY_PRINTF
  101. bool "Enable tiny printf() version in SPL"
  102. depends on SPL
  103. default y
  104. help
  105. This option enables a tiny, stripped down printf version.
  106. This should only be used in space limited environments,
  107. like SPL versions with hard memory limits. This version
  108. reduces the code size by about 2.5KiB on armv7.
  109. The supported format specifiers are %c, %s, %u/%d and %x.
  110. config TPL_USE_TINY_PRINTF
  111. bool "Enable tiny printf() version in TPL"
  112. depends on TPL
  113. default y if SPL_USE_TINY_PRINTF
  114. help
  115. This option enables a tiny, stripped down printf version.
  116. This should only be used in space limited environments,
  117. like SPL versions with hard memory limits. This version
  118. reduces the code size by about 2.5KiB on armv7.
  119. The supported format specifiers are %c, %s, %u/%d and %x.
  120. config PANIC_HANG
  121. bool "Do not reset the system on fatal error"
  122. help
  123. Define this option to stop the system in case of a fatal error,
  124. so that you have to reset it manually. This is probably NOT a good
  125. idea for an embedded system where you want the system to reboot
  126. automatically as fast as possible, but it may be useful during
  127. development since you can try to debug the conditions that lead to
  128. the situation.
  129. config REGEX
  130. bool "Enable regular expression support"
  131. default y if NET
  132. help
  133. If this variable is defined, U-Boot is linked against the
  134. SLRE (Super Light Regular Expression) library, which adds
  135. regex support to some commands, for example "env grep" and
  136. "setexpr".
  137. choice
  138. prompt "Pseudo-random library support type"
  139. depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID || \
  140. RNG_SANDBOX || UT_LIB && AES
  141. default LIB_RAND
  142. help
  143. Select the library to provide pseudo-random number generator
  144. functions. LIB_HW_RAND supports certain hardware engines that
  145. provide this functionality. If in doubt, select LIB_RAND.
  146. config LIB_RAND
  147. bool "Pseudo-random library support"
  148. config LIB_HW_RAND
  149. bool "HW Engine for random library support"
  150. endchoice
  151. config SPL_TINY_MEMSET
  152. bool "Use a very small memset() in SPL"
  153. help
  154. The faster memset() is the arch-specific one (if available) enabled
  155. by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
  156. better performance by writing a word at a time. But in very
  157. size-constrained environments even this may be too big. Enable this
  158. option to reduce code size slightly at the cost of some speed.
  159. config TPL_TINY_MEMSET
  160. bool "Use a very small memset() in TPL"
  161. help
  162. The faster memset() is the arch-specific one (if available) enabled
  163. by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
  164. better performance by writing a word at a time. But in very
  165. size-constrained environments even this may be too big. Enable this
  166. option to reduce code size slightly at the cost of some speed.
  167. config RBTREE
  168. bool
  169. config BITREVERSE
  170. bool "Bit reverse library from Linux"
  171. config TRACE
  172. bool "Support for tracing of function calls and timing"
  173. imply CMD_TRACE
  174. help
  175. Enables function tracing within U-Boot. This allows recording of call
  176. traces including timing information. The command can write data to
  177. memory for exporting for analysis (e.g. using bootchart).
  178. See doc/README.trace for full details.
  179. config TRACE_BUFFER_SIZE
  180. hex "Size of trace buffer in U-Boot"
  181. depends on TRACE
  182. default 0x01000000
  183. help
  184. Sets the size of the trace buffer in U-Boot. This is allocated from
  185. memory during relocation. If this buffer is too small, the trace
  186. history will be truncated, with later records omitted.
  187. If early trace is enabled (i.e. before relocation), this buffer must
  188. be large enough to include all the data from the early trace buffer as
  189. well, since this is copied over to the main buffer during relocation.
  190. A trace record is emitted for each function call and each record is
  191. 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
  192. the size is too small then 'trace stats' will show a message saying
  193. how many records were dropped due to buffer overflow.
  194. config TRACE_CALL_DEPTH_LIMIT
  195. int "Trace call depth limit"
  196. depends on TRACE
  197. default 15
  198. help
  199. Sets the maximum call depth up to which function calls are recorded.
  200. config TRACE_EARLY
  201. bool "Enable tracing before relocation"
  202. depends on TRACE
  203. help
  204. Sometimes it is helpful to trace execution of U-Boot before
  205. relocation. This is possible by using a arch-specific, fixed buffer
  206. position in memory. Enable this option to start tracing as early as
  207. possible after U-Boot starts.
  208. config TRACE_EARLY_SIZE
  209. hex "Size of early trace buffer in U-Boot"
  210. depends on TRACE_EARLY
  211. default 0x00100000
  212. help
  213. Sets the size of the early trace buffer in bytes. This is used to hold
  214. tracing information before relocation.
  215. config TRACE_EARLY_CALL_DEPTH_LIMIT
  216. int "Early trace call depth limit"
  217. depends on TRACE_EARLY
  218. default 200
  219. help
  220. Sets the maximum call depth up to which function calls are recorded
  221. during early tracing.
  222. config TRACE_EARLY_ADDR
  223. hex "Address of early trace buffer in U-Boot"
  224. depends on TRACE_EARLY
  225. default 0x00100000
  226. help
  227. Sets the address of the early trace buffer in U-Boot. This memory
  228. must be accessible before relocation.
  229. A trace record is emitted for each function call and each record is
  230. 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
  231. the size is too small then the message which says the amount of early
  232. data being coped will the the same as the
  233. source lib/dhry/Kconfig
  234. menu "Security support"
  235. config AES
  236. bool "Support the AES algorithm"
  237. help
  238. This provides a means to encrypt and decrypt data using the AES
  239. (Advanced Encryption Standard). This algorithm uses a symetric key
  240. and is widely used as a streaming cipher. Different key lengths are
  241. supported by the algorithm but only a 128-bit key is supported at
  242. present.
  243. source lib/rsa/Kconfig
  244. source lib/crypto/Kconfig
  245. config TPM
  246. bool "Trusted Platform Module (TPM) Support"
  247. depends on DM
  248. help
  249. This enables support for TPMs which can be used to provide security
  250. features for your board. The TPM can be connected via LPC or I2C
  251. and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  252. command to interactive the TPM. Driver model support is provided
  253. for the low-level TPM interface, but only one TPM is supported at
  254. a time by the TPM library.
  255. config SPL_TPM
  256. bool "Trusted Platform Module (TPM) Support in SPL"
  257. depends on SPL_DM
  258. help
  259. This enables support for TPMs which can be used to provide security
  260. features for your board. The TPM can be connected via LPC or I2C
  261. and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  262. command to interactive the TPM. Driver model support is provided
  263. for the low-level TPM interface, but only one TPM is supported at
  264. a time by the TPM library.
  265. config TPL_TPM
  266. bool "Trusted Platform Module (TPM) Support in TPL"
  267. depends on TPL_DM
  268. help
  269. This enables support for TPMs which can be used to provide security
  270. features for your board. The TPM can be connected via LPC or I2C
  271. and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  272. command to interactive the TPM. Driver model support is provided
  273. for the low-level TPM interface, but only one TPM is supported at
  274. a time by the TPM library.
  275. endmenu
  276. menu "Android Verified Boot"
  277. config LIBAVB
  278. bool "Android Verified Boot 2.0 support"
  279. depends on ANDROID_BOOT_IMAGE
  280. default n
  281. help
  282. This enables support of Android Verified Boot 2.0 which can be used
  283. to assure the end user of the integrity of the software running on a
  284. device. Introduces such features as boot chain of trust, rollback
  285. protection etc.
  286. endmenu
  287. menu "Hashing Support"
  288. config SHA1
  289. bool "Enable SHA1 support"
  290. help
  291. This option enables support of hashing using SHA1 algorithm.
  292. The hash is calculated in software.
  293. The SHA1 algorithm produces a 160-bit (20-byte) hash value
  294. (digest).
  295. config SHA256
  296. bool "Enable SHA256 support"
  297. help
  298. This option enables support of hashing using SHA256 algorithm.
  299. The hash is calculated in software.
  300. The SHA256 algorithm produces a 256-bit (32-byte) hash value
  301. (digest).
  302. config SHA512_ALGO
  303. bool "Enable SHA512 algorithm"
  304. help
  305. This option enables support of internal SHA512 algorithm.
  306. config SHA512
  307. bool "Enable SHA512 support"
  308. depends on SHA512_ALGO
  309. help
  310. This option enables support of hashing using SHA512 algorithm.
  311. The hash is calculated in software.
  312. The SHA512 algorithm produces a 512-bit (64-byte) hash value
  313. (digest).
  314. config SHA384
  315. bool "Enable SHA384 support"
  316. depends on SHA512_ALGO
  317. help
  318. This option enables support of hashing using SHA384 algorithm.
  319. The hash is calculated in software.
  320. The SHA384 algorithm produces a 384-bit (48-byte) hash value
  321. (digest).
  322. config SHA_HW_ACCEL
  323. bool "Enable hashing using hardware"
  324. help
  325. This option enables hardware acceleration
  326. for SHA1/SHA256 hashing.
  327. This affects the 'hash' command and also the
  328. hash_lookup_algo() function.
  329. config SHA_PROG_HW_ACCEL
  330. bool "Enable Progressive hashing support using hardware"
  331. depends on SHA_HW_ACCEL
  332. help
  333. This option enables hardware-acceleration for
  334. SHA1/SHA256 progressive hashing.
  335. Data can be streamed in a block at a time and the hashing
  336. is performed in hardware.
  337. config MD5
  338. bool "Support MD5 algorithm"
  339. help
  340. This option enables MD5 support. MD5 is an algorithm designed
  341. in 1991 that produces a 16-byte digest (or checksum) from its input
  342. data. It has a number of vulnerabilities which preclude its use in
  343. security applications, but it can be useful for providing a quick
  344. checksum of a block of data.
  345. config SPL_MD5
  346. bool "Support MD5 algorithm in SPL"
  347. help
  348. This option enables MD5 support in SPL. MD5 is an algorithm designed
  349. in 1991 that produces a 16-byte digest (or checksum) from its input
  350. data. It has a number of vulnerabilities which preclude its use in
  351. security applications, but it can be useful for providing a quick
  352. checksum of a block of data.
  353. config CRC32C
  354. bool
  355. config XXHASH
  356. bool
  357. endmenu
  358. menu "Compression Support"
  359. config LZ4
  360. bool "Enable LZ4 decompression support"
  361. help
  362. If this option is set, support for LZ4 compressed images
  363. is included. The LZ4 algorithm can run in-place as long as the
  364. compressed image is loaded to the end of the output buffer, and
  365. trades lower compression ratios for much faster decompression.
  366. NOTE: This implements the release version of the LZ4 frame
  367. format as generated by default by the 'lz4' command line tool.
  368. This is not the same as the outdated, less efficient legacy
  369. frame format currently (2015) implemented in the Linux kernel
  370. (generated by 'lz4 -l'). The two formats are incompatible.
  371. config LZMA
  372. bool "Enable LZMA decompression support"
  373. help
  374. This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
  375. a dictionary compression algorithm that provides a high compression
  376. ratio and fairly fast decompression speed. See also
  377. CONFIG_CMD_LZMADEC which provides a decode command.
  378. config LZO
  379. bool "Enable LZO decompression support"
  380. help
  381. This enables support for LZO compression algorithm.r
  382. config GZIP
  383. bool "Enable gzip decompression support"
  384. select ZLIB
  385. default y
  386. help
  387. This enables support for GZIP compression algorithm.
  388. config ZLIB_UNCOMPRESS
  389. bool "Enables zlib's uncompress() functionality"
  390. help
  391. This enables an extra zlib functionality: the uncompress() function,
  392. which decompresses data from a buffer into another, knowing their
  393. sizes. Unlike gunzip(), there is no header parsing.
  394. config GZIP_COMPRESSED
  395. bool
  396. select ZLIB
  397. config BZIP2
  398. bool "Enable bzip2 decompression support"
  399. help
  400. This enables support for BZIP2 compression algorithm.
  401. config ZLIB
  402. bool
  403. default y
  404. help
  405. This enables ZLIB compression lib.
  406. config ZSTD
  407. bool "Enable Zstandard decompression support"
  408. select XXHASH
  409. help
  410. This enables Zstandard decompression library.
  411. config SPL_LZ4
  412. bool "Enable LZ4 decompression support in SPL"
  413. help
  414. This enables support for the LZ4 decompression algorithm in SPL. LZ4
  415. is a lossless data compression algorithm that is focused on
  416. fast compression and decompression speed. It belongs to the LZ77
  417. family of byte-oriented compression schemes.
  418. config SPL_LZMA
  419. bool "Enable LZMA decompression support for SPL build"
  420. help
  421. This enables support for LZMA compression algorithm for SPL boot.
  422. config SPL_LZO
  423. bool "Enable LZO decompression support in SPL"
  424. help
  425. This enables support for LZO compression algorithm in the SPL.
  426. config SPL_GZIP
  427. bool "Enable gzip decompression support for SPL build"
  428. select SPL_ZLIB
  429. help
  430. This enables support for GZIP compression altorithm for SPL boot.
  431. config SPL_ZLIB
  432. bool
  433. help
  434. This enables compression lib for SPL boot.
  435. config SPL_ZSTD
  436. bool "Enable Zstandard decompression support in SPL"
  437. select XXHASH
  438. help
  439. This enables Zstandard decompression library in the SPL.
  440. endmenu
  441. config ERRNO_STR
  442. bool "Enable function for getting errno-related string message"
  443. help
  444. The function errno_str(int errno), returns a pointer to the errno
  445. corresponding text message:
  446. - if errno is null or positive number - a pointer to "Success" message
  447. - if errno is negative - a pointer to errno related message
  448. config HEXDUMP
  449. bool "Enable hexdump"
  450. help
  451. This enables functions for printing dumps of binary data.
  452. config OF_LIBFDT
  453. bool "Enable the FDT library"
  454. default y if OF_CONTROL
  455. help
  456. This enables the FDT library (libfdt). It provides functions for
  457. accessing binary device tree images in memory, such as adding and
  458. removing nodes and properties, scanning through the tree and finding
  459. particular compatible nodes. The library operates on a flattened
  460. version of the device tree.
  461. config OF_LIBFDT_ASSUME_MASK
  462. hex "Mask of conditions to assume for libfdt"
  463. depends on OF_LIBFDT || FIT
  464. default 0
  465. help
  466. Use this to change the assumptions made by libfdt about the
  467. device tree it is working with. A value of 0 means that no assumptions
  468. are made, and libfdt is able to deal with malicious data. A value of
  469. 0xff means all assumptions are made and any invalid data may cause
  470. unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
  471. config OF_LIBFDT_OVERLAY
  472. bool "Enable the FDT library overlay support"
  473. depends on OF_LIBFDT
  474. default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
  475. help
  476. This enables the FDT library (libfdt) overlay support.
  477. config SPL_OF_LIBFDT
  478. bool "Enable the FDT library for SPL"
  479. default y if SPL_OF_CONTROL
  480. help
  481. This enables the FDT library (libfdt). It provides functions for
  482. accessing binary device tree images in memory, such as adding and
  483. removing nodes and properties, scanning through the tree and finding
  484. particular compatible nodes. The library operates on a flattened
  485. version of the device tree.
  486. config SPL_OF_LIBFDT_ASSUME_MASK
  487. hex "Mask of conditions to assume for libfdt"
  488. depends on SPL_OF_LIBFDT || FIT
  489. default 0xff
  490. help
  491. Use this to change the assumptions made by libfdt in SPL about the
  492. device tree it is working with. A value of 0 means that no assumptions
  493. are made, and libfdt is able to deal with malicious data. A value of
  494. 0xff means all assumptions are made and any invalid data may cause
  495. unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
  496. config TPL_OF_LIBFDT
  497. bool "Enable the FDT library for TPL"
  498. default y if TPL_OF_CONTROL
  499. help
  500. This enables the FDT library (libfdt). It provides functions for
  501. accessing binary device tree images in memory, such as adding and
  502. removing nodes and properties, scanning through the tree and finding
  503. particular compatible nodes. The library operates on a flattened
  504. version of the device tree.
  505. config TPL_OF_LIBFDT_ASSUME_MASK
  506. hex "Mask of conditions to assume for libfdt"
  507. depends on TPL_OF_LIBFDT || FIT
  508. default 0xff
  509. help
  510. Use this to change the assumptions made by libfdt in TPL about the
  511. device tree it is working with. A value of 0 means that no assumptions
  512. are made, and libfdt is able to deal with malicious data. A value of
  513. 0xff means all assumptions are made and any invalid data may cause
  514. unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
  515. config FDT_FIXUP_PARTITIONS
  516. bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
  517. depends on OF_LIBFDT
  518. depends on CMD_MTDPARTS
  519. help
  520. Allow overwriting defined partitions in the device tree blob
  521. using partition info defined in the 'mtdparts' environment
  522. variable.
  523. menu "System tables"
  524. depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
  525. config GENERATE_SMBIOS_TABLE
  526. bool "Generate an SMBIOS (System Management BIOS) table"
  527. default y
  528. depends on X86 || EFI_LOADER
  529. help
  530. The System Management BIOS (SMBIOS) specification addresses how
  531. motherboard and system vendors present management information about
  532. their products in a standard format by extending the BIOS interface
  533. on Intel architecture systems.
  534. Check http://www.dmtf.org/standards/smbios for details.
  535. config SMBIOS_MANUFACTURER
  536. string "SMBIOS Manufacturer"
  537. depends on GENERATE_SMBIOS_TABLE
  538. default SYS_VENDOR
  539. help
  540. The board manufacturer to store in SMBIOS structures.
  541. Change this to override the default one (CONFIG_SYS_VENDOR).
  542. config SMBIOS_PRODUCT_NAME
  543. string "SMBIOS Product Name"
  544. depends on GENERATE_SMBIOS_TABLE
  545. default SYS_BOARD
  546. help
  547. The product name to store in SMBIOS structures.
  548. Change this to override the default one (CONFIG_SYS_BOARD).
  549. endmenu
  550. config ASN1_COMPILER
  551. bool
  552. config ASN1_DECODER
  553. bool
  554. help
  555. Enable asn1 decoder library.
  556. config OID_REGISTRY
  557. bool
  558. help
  559. Enable fast lookup object identifier registry.
  560. source lib/efi/Kconfig
  561. source lib/efi_loader/Kconfig
  562. source lib/optee/Kconfig
  563. config TEST_FDTDEC
  564. bool "enable fdtdec test"
  565. depends on OF_LIBFDT
  566. config LIB_DATE
  567. bool
  568. config LIB_ELF
  569. bool
  570. help
  571. Supoort basic elf loading/validating functions.
  572. This supports fir 32 bit and 64 bit versions.
  573. endmenu