1# SPDX-License-Identifier: GPL-2.0-only 2# 3# Hardware Random Number Generator (RNG) configuration 4# 5 6menuconfig HW_RANDOM 7 tristate "Hardware Random Number Generator Core support" 8 default m 9 help 10 Hardware Random Number Generator Core infrastructure. 11 12 To compile this driver as a module, choose M here: the 13 module will be called rng-core. This provides a device 14 that's usually called /dev/hwrng, and which exposes one 15 of possibly several hardware random number generators. 16 17 These hardware random number generators do feed into the 18 kernel's random number generator entropy pool. 19 20 If unsure, say Y. 21 22if HW_RANDOM 23 24config HW_RANDOM_TIMERIOMEM 25 tristate "Timer IOMEM HW Random Number Generator support" 26 depends on HAS_IOMEM 27 help 28 This driver provides kernel-side support for a generic Random 29 Number Generator used by reading a 'dumb' iomem address that 30 is to be read no faster than, for example, once a second; 31 the default FPGA bitstream on the TS-7800 has such functionality. 32 33 To compile this driver as a module, choose M here: the 34 module will be called timeriomem-rng. 35 36 If unsure, say Y. 37 38config HW_RANDOM_INTEL 39 tristate "Intel HW Random Number Generator support" 40 depends on (X86 || IA64) && PCI 41 default HW_RANDOM 42 help 43 This driver provides kernel-side support for the Random Number 44 Generator hardware found on Intel i8xx-based motherboards. 45 46 To compile this driver as a module, choose M here: the 47 module will be called intel-rng. 48 49 If unsure, say Y. 50 51config HW_RANDOM_AMD 52 tristate "AMD HW Random Number Generator support" 53 depends on (X86 || PPC_MAPLE) && PCI 54 default HW_RANDOM 55 help 56 This driver provides kernel-side support for the Random Number 57 Generator hardware found on AMD 76x-based motherboards. 58 59 To compile this driver as a module, choose M here: the 60 module will be called amd-rng. 61 62 If unsure, say Y. 63 64config HW_RANDOM_ATMEL 65 tristate "Atmel Random Number Generator support" 66 depends on ARCH_AT91 && HAVE_CLK && OF 67 default HW_RANDOM 68 help 69 This driver provides kernel-side support for the Random Number 70 Generator hardware found on Atmel AT91 devices. 71 72 To compile this driver as a module, choose M here: the 73 module will be called atmel-rng. 74 75 If unsure, say Y. 76 77config HW_RANDOM_BA431 78 tristate "Silex Insight BA431 Random Number Generator support" 79 depends on HAS_IOMEM 80 help 81 This driver provides kernel-side support for the Random Number 82 Generator hardware based on Silex Insight BA431 IP. 83 84 To compile this driver as a module, choose M here: the 85 module will be called ba431-rng. 86 87config HW_RANDOM_BCM2835 88 tristate "Broadcom BCM2835/BCM63xx Random Number Generator support" 89 depends on ARCH_BCM2835 || ARCH_BCM_NSP || ARCH_BCM_5301X || \ 90 ARCH_BCM_63XX || BCM63XX || BMIPS_GENERIC 91 default HW_RANDOM 92 help 93 This driver provides kernel-side support for the Random Number 94 Generator hardware found on the Broadcom BCM2835 and BCM63xx SoCs. 95 96 To compile this driver as a module, choose M here: the 97 module will be called bcm2835-rng 98 99 If unsure, say Y. 100 101config HW_RANDOM_IPROC_RNG200 102 tristate "Broadcom iProc/STB RNG200 support" 103 depends on ARCH_BCM_IPROC || ARCH_BCM2835 || ARCH_BRCMSTB 104 default HW_RANDOM 105 help 106 This driver provides kernel-side support for the RNG200 107 hardware found on the Broadcom iProc and STB SoCs. 108 109 To compile this driver as a module, choose M here: the 110 module will be called iproc-rng200 111 112 If unsure, say Y. 113 114config HW_RANDOM_GEODE 115 tristate "AMD Geode HW Random Number Generator support" 116 depends on X86_32 && PCI 117 default HW_RANDOM 118 help 119 This driver provides kernel-side support for the Random Number 120 Generator hardware found on the AMD Geode LX. 121 122 To compile this driver as a module, choose M here: the 123 module will be called geode-rng. 124 125 If unsure, say Y. 126 127config HW_RANDOM_N2RNG 128 tristate "Niagara2 Random Number Generator support" 129 depends on SPARC64 130 default HW_RANDOM 131 help 132 This driver provides kernel-side support for the Random Number 133 Generator hardware found on Niagara2 cpus. 134 135 To compile this driver as a module, choose M here: the 136 module will be called n2-rng. 137 138 If unsure, say Y. 139 140config HW_RANDOM_VIA 141 tristate "VIA HW Random Number Generator support" 142 depends on X86 143 default HW_RANDOM 144 help 145 This driver provides kernel-side support for the Random Number 146 Generator hardware found on VIA based motherboards. 147 148 To compile this driver as a module, choose M here: the 149 module will be called via-rng. 150 151 If unsure, say Y. 152 153config HW_RANDOM_IXP4XX 154 tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support" 155 depends on ARCH_IXP4XX 156 default HW_RANDOM 157 help 158 This driver provides kernel-side support for the Pseudo-Random 159 Number Generator hardware found on the Intel IXP45x/46x NPU. 160 161 To compile this driver as a module, choose M here: the 162 module will be called ixp4xx-rng. 163 164 If unsure, say Y. 165 166config HW_RANDOM_OMAP 167 tristate "OMAP Random Number Generator support" 168 depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS || ARCH_MVEBU 169 default HW_RANDOM 170 help 171 This driver provides kernel-side support for the Random Number 172 Generator hardware found on OMAP16xx, OMAP2/3/4/5, AM33xx/AM43xx 173 multimedia processors, and Marvell Armada 7k/8k SoCs. 174 175 To compile this driver as a module, choose M here: the 176 module will be called omap-rng. 177 178 If unsure, say Y. 179 180config HW_RANDOM_OMAP3_ROM 181 tristate "OMAP3 ROM Random Number Generator support" 182 depends on ARCH_OMAP3 183 default HW_RANDOM 184 help 185 This driver provides kernel-side support for the Random Number 186 Generator hardware found on OMAP34xx processors. 187 188 To compile this driver as a module, choose M here: the 189 module will be called omap3-rom-rng. 190 191 If unsure, say Y. 192 193config HW_RANDOM_OCTEON 194 tristate "Octeon Random Number Generator support" 195 depends on CAVIUM_OCTEON_SOC 196 default HW_RANDOM 197 help 198 This driver provides kernel-side support for the Random Number 199 Generator hardware found on Octeon processors. 200 201 To compile this driver as a module, choose M here: the 202 module will be called octeon-rng. 203 204 If unsure, say Y. 205 206config HW_RANDOM_PASEMI 207 tristate "PA Semi HW Random Number Generator support" 208 depends on PPC_PASEMI 209 default HW_RANDOM 210 help 211 This driver provides kernel-side support for the Random Number 212 Generator hardware found on PA Semi PWRficient SoCs. 213 214 To compile this driver as a module, choose M here: the 215 module will be called pasemi-rng. 216 217 If unsure, say Y. 218 219config HW_RANDOM_VIRTIO 220 tristate "VirtIO Random Number Generator support" 221 depends on VIRTIO 222 help 223 This driver provides kernel-side support for the virtual Random Number 224 Generator hardware. 225 226 To compile this driver as a module, choose M here: the 227 module will be called virtio-rng. If unsure, say N. 228 229config HW_RANDOM_TX4939 230 tristate "TX4939 Random Number Generator support" 231 depends on SOC_TX4939 232 default HW_RANDOM 233 help 234 This driver provides kernel-side support for the Random Number 235 Generator hardware found on TX4939 SoC. 236 237 To compile this driver as a module, choose M here: the 238 module will be called tx4939-rng. 239 240 If unsure, say Y. 241 242config HW_RANDOM_MXC_RNGA 243 tristate "Freescale i.MX RNGA Random Number Generator" 244 depends on SOC_IMX31 245 default HW_RANDOM 246 help 247 This driver provides kernel-side support for the Random Number 248 Generator hardware found on Freescale i.MX processors. 249 250 To compile this driver as a module, choose M here: the 251 module will be called mxc-rnga. 252 253 If unsure, say Y. 254 255config HW_RANDOM_IMX_RNGC 256 tristate "Freescale i.MX RNGC Random Number Generator" 257 depends on HAS_IOMEM && HAVE_CLK 258 depends on SOC_IMX25 || SOC_IMX6SL || SOC_IMX6SLL || SOC_IMX6UL || COMPILE_TEST 259 default HW_RANDOM 260 help 261 This driver provides kernel-side support for the Random Number 262 Generator Version C hardware found on some Freescale i.MX 263 processors. Version B is also supported by this driver. 264 265 To compile this driver as a module, choose M here: the 266 module will be called imx-rngc. 267 268 If unsure, say Y. 269 270config HW_RANDOM_INGENIC_RNG 271 tristate "Ingenic Random Number Generator support" 272 depends on HW_RANDOM 273 depends on MACH_JZ4780 || MACH_X1000 274 default HW_RANDOM 275 help 276 This driver provides kernel-side support for the Random Number Generator 277 hardware found in ingenic JZ4780 and X1000 SoC. MIPS Creator CI20 uses 278 JZ4780 SoC, YSH & ATIL CU1000-Neo uses X1000 SoC. 279 280 To compile this driver as a module, choose M here: the 281 module will be called ingenic-rng. 282 283 If unsure, say Y. 284 285config HW_RANDOM_NOMADIK 286 tristate "ST-Ericsson Nomadik Random Number Generator support" 287 depends on ARCH_NOMADIK 288 default HW_RANDOM 289 help 290 This driver provides kernel-side support for the Random Number 291 Generator hardware found on ST-Ericsson SoCs (8815 and 8500). 292 293 To compile this driver as a module, choose M here: the 294 module will be called nomadik-rng. 295 296 If unsure, say Y. 297 298config HW_RANDOM_PSERIES 299 tristate "pSeries HW Random Number Generator support" 300 depends on PPC64 && IBMVIO 301 default HW_RANDOM 302 help 303 This driver provides kernel-side support for the Random Number 304 Generator hardware found on POWER7+ machines and above 305 306 To compile this driver as a module, choose M here: the 307 module will be called pseries-rng. 308 309 If unsure, say Y. 310 311config HW_RANDOM_POWERNV 312 tristate "PowerNV Random Number Generator support" 313 depends on PPC_POWERNV 314 default HW_RANDOM 315 help 316 This is the driver for Random Number Generator hardware found 317 in POWER7+ and above machines for PowerNV platform. 318 319 To compile this driver as a module, choose M here: the 320 module will be called powernv-rng. 321 322 If unsure, say Y. 323 324config HW_RANDOM_HISI 325 tristate "Hisilicon Random Number Generator support" 326 depends on HW_RANDOM && ARCH_HISI 327 default HW_RANDOM 328 help 329 This driver provides kernel-side support for the Random Number 330 Generator hardware found on Hisilicon Hip04 and Hip05 SoC. 331 332 To compile this driver as a module, choose M here: the 333 module will be called hisi-rng. 334 335 If unsure, say Y. 336 337config HW_RANDOM_HISI_V2 338 tristate "HiSilicon True Random Number Generator V2 support" 339 depends on HW_RANDOM && ARM64 && ACPI 340 default HW_RANDOM 341 help 342 This driver provides kernel-side support for the True Random Number 343 Generator V2 hardware found on HiSilicon Hi1620 SoC. 344 345 To compile this driver as a module, choose M here: the 346 module will be called hisi-trng-v2. 347 348 If unsure, say Y. 349 350config HW_RANDOM_ST 351 tristate "ST Microelectronics HW Random Number Generator support" 352 depends on HW_RANDOM && ARCH_STI 353 help 354 This driver provides kernel-side support for the Random Number 355 Generator hardware found on STi series of SoCs. 356 357 To compile this driver as a module, choose M here: the 358 module will be called st-rng. 359 360config HW_RANDOM_XGENE 361 tristate "APM X-Gene True Random Number Generator (TRNG) support" 362 depends on HW_RANDOM && ARCH_XGENE 363 default HW_RANDOM 364 help 365 This driver provides kernel-side support for the Random Number 366 Generator hardware found on APM X-Gene SoC. 367 368 To compile this driver as a module, choose M here: the 369 module will be called xgene_rng. 370 371 If unsure, say Y. 372 373config HW_RANDOM_STM32 374 tristate "STMicroelectronics STM32 random number generator" 375 depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST) 376 depends on HAS_IOMEM 377 default HW_RANDOM 378 help 379 This driver provides kernel-side support for the Random Number 380 Generator hardware found on STM32 microcontrollers. 381 382 To compile this driver as a module, choose M here: the 383 module will be called stm32-rng. 384 385 If unsure, say N. 386 387config HW_RANDOM_PIC32 388 tristate "Microchip PIC32 Random Number Generator support" 389 depends on HW_RANDOM && MACH_PIC32 390 default y 391 help 392 This driver provides kernel-side support for the Random Number 393 Generator hardware found on a PIC32. 394 395 To compile this driver as a module, choose M here. the 396 module will be called pic32-rng. 397 398 If unsure, say Y. 399 400config HW_RANDOM_MESON 401 tristate "Amlogic Meson Random Number Generator support" 402 depends on HW_RANDOM 403 depends on ARCH_MESON || COMPILE_TEST 404 default y 405 help 406 This driver provides kernel-side support for the Random Number 407 Generator hardware found on Amlogic Meson SoCs. 408 409 To compile this driver as a module, choose M here. the 410 module will be called meson-rng. 411 412 If unsure, say Y. 413 414config HW_RANDOM_CAVIUM 415 tristate "Cavium ThunderX Random Number Generator support" 416 depends on HW_RANDOM && PCI && (ARM64 || (COMPILE_TEST && 64BIT)) 417 default HW_RANDOM 418 help 419 This driver provides kernel-side support for the Random Number 420 Generator hardware found on Cavium SoCs. 421 422 To compile this driver as a module, choose M here: the 423 module will be called cavium_rng. 424 425 If unsure, say Y. 426 427config HW_RANDOM_MTK 428 tristate "Mediatek Random Number Generator support" 429 depends on HW_RANDOM 430 depends on ARCH_MEDIATEK || COMPILE_TEST 431 default y 432 help 433 This driver provides kernel-side support for the Random Number 434 Generator hardware found on Mediatek SoCs. 435 436 To compile this driver as a module, choose M here. the 437 module will be called mtk-rng. 438 439 If unsure, say Y. 440 441config HW_RANDOM_S390 442 tristate "S390 True Random Number Generator support" 443 depends on S390 444 default HW_RANDOM 445 help 446 This driver provides kernel-side support for the True 447 Random Number Generator available as CPACF extension 448 on modern s390 hardware platforms. 449 450 To compile this driver as a module, choose M here: the 451 module will be called s390-trng. 452 453 If unsure, say Y. 454 455config HW_RANDOM_EXYNOS 456 tristate "Samsung Exynos True Random Number Generator support" 457 depends on ARCH_EXYNOS || COMPILE_TEST 458 default HW_RANDOM 459 help 460 This driver provides support for the True Random Number 461 Generator available in Exynos SoCs. 462 463 To compile this driver as a module, choose M here: the module 464 will be called exynos-trng. 465 466 If unsure, say Y. 467 468config HW_RANDOM_OPTEE 469 tristate "OP-TEE based Random Number Generator support" 470 depends on OPTEE 471 default HW_RANDOM 472 help 473 This driver provides support for OP-TEE based Random Number 474 Generator on ARM SoCs where hardware entropy sources are not 475 accessible to normal world (Linux). 476 477 To compile this driver as a module, choose M here: the module 478 will be called optee-rng. 479 480 If unsure, say Y. 481 482config HW_RANDOM_NPCM 483 tristate "NPCM Random Number Generator support" 484 depends on ARCH_NPCM || COMPILE_TEST 485 default HW_RANDOM 486 help 487 This driver provides support for the Random Number 488 Generator hardware available in Nuvoton NPCM SoCs. 489 490 To compile this driver as a module, choose M here: the 491 module will be called npcm-rng. 492 493 If unsure, say Y. 494 495config HW_RANDOM_KEYSTONE 496 depends on ARCH_KEYSTONE || COMPILE_TEST 497 default HW_RANDOM 498 tristate "TI Keystone NETCP SA Hardware random number generator" 499 help 500 This option enables Keystone's hardware random generator. 501 502config HW_RANDOM_CCTRNG 503 tristate "Arm CryptoCell True Random Number Generator support" 504 depends on HAS_IOMEM && OF 505 help 506 Say 'Y' to enable the True Random Number Generator driver for the 507 Arm TrustZone CryptoCell family of processors. 508 Currently the CryptoCell 713 and 703 are supported. 509 The driver is supported only in SoC where Trusted Execution 510 Environment is not used. 511 Choose 'M' to compile this driver as a module. The module 512 will be called cctrng. 513 If unsure, say 'N'. 514 515endif # HW_RANDOM 516 517config UML_RANDOM 518 depends on UML 519 tristate "Hardware random number generator" 520 help 521 This option enables UML's "hardware" random number generator. It 522 attaches itself to the host's /dev/random, supplying as much entropy 523 as the host has, rather than the small amount the UML gets from its 524 own drivers. It registers itself as a standard hardware random number 525 generator, major 10, minor 183, and the canonical device name is 526 /dev/hwrng. 527 The way to make use of this is to install the rng-tools package 528 (check your distro, or download from 529 http://sourceforge.net/projects/gkernel/). rngd periodically reads 530 /dev/hwrng and injects the entropy into /dev/random. 531