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_BCM2835 78 tristate "Broadcom BCM2835/BCM63xx Random Number Generator support" 79 depends on ARCH_BCM2835 || ARCH_BCM_NSP || ARCH_BCM_5301X || \ 80 ARCH_BCM_63XX || BCM63XX || BMIPS_GENERIC 81 default HW_RANDOM 82 ---help--- 83 This driver provides kernel-side support for the Random Number 84 Generator hardware found on the Broadcom BCM2835 and BCM63xx SoCs. 85 86 To compile this driver as a module, choose M here: the 87 module will be called bcm2835-rng 88 89 If unsure, say Y. 90 91config HW_RANDOM_IPROC_RNG200 92 tristate "Broadcom iProc/STB RNG200 support" 93 depends on ARCH_BCM_IPROC || ARCH_BCM2835 || ARCH_BRCMSTB 94 default HW_RANDOM 95 ---help--- 96 This driver provides kernel-side support for the RNG200 97 hardware found on the Broadcom iProc and STB SoCs. 98 99 To compile this driver as a module, choose M here: the 100 module will be called iproc-rng200 101 102 If unsure, say Y. 103 104config HW_RANDOM_GEODE 105 tristate "AMD Geode HW Random Number Generator support" 106 depends on X86_32 && PCI 107 default HW_RANDOM 108 ---help--- 109 This driver provides kernel-side support for the Random Number 110 Generator hardware found on the AMD Geode LX. 111 112 To compile this driver as a module, choose M here: the 113 module will be called geode-rng. 114 115 If unsure, say Y. 116 117config HW_RANDOM_N2RNG 118 tristate "Niagara2 Random Number Generator support" 119 depends on SPARC64 120 default HW_RANDOM 121 ---help--- 122 This driver provides kernel-side support for the Random Number 123 Generator hardware found on Niagara2 cpus. 124 125 To compile this driver as a module, choose M here: the 126 module will be called n2-rng. 127 128 If unsure, say Y. 129 130config HW_RANDOM_VIA 131 tristate "VIA HW Random Number Generator support" 132 depends on X86 133 default HW_RANDOM 134 ---help--- 135 This driver provides kernel-side support for the Random Number 136 Generator hardware found on VIA based motherboards. 137 138 To compile this driver as a module, choose M here: the 139 module will be called via-rng. 140 141 If unsure, say Y. 142 143config HW_RANDOM_IXP4XX 144 tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support" 145 depends on ARCH_IXP4XX 146 default HW_RANDOM 147 ---help--- 148 This driver provides kernel-side support for the Pseudo-Random 149 Number Generator hardware found on the Intel IXP45x/46x NPU. 150 151 To compile this driver as a module, choose M here: the 152 module will be called ixp4xx-rng. 153 154 If unsure, say Y. 155 156config HW_RANDOM_OMAP 157 tristate "OMAP Random Number Generator support" 158 depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS || ARCH_MVEBU 159 default HW_RANDOM 160 ---help--- 161 This driver provides kernel-side support for the Random Number 162 Generator hardware found on OMAP16xx, OMAP2/3/4/5, AM33xx/AM43xx 163 multimedia processors, and Marvell Armada 7k/8k SoCs. 164 165 To compile this driver as a module, choose M here: the 166 module will be called omap-rng. 167 168 If unsure, say Y. 169 170config HW_RANDOM_OMAP3_ROM 171 tristate "OMAP3 ROM Random Number Generator support" 172 depends on ARCH_OMAP3 173 default HW_RANDOM 174 ---help--- 175 This driver provides kernel-side support for the Random Number 176 Generator hardware found on OMAP34xx processors. 177 178 To compile this driver as a module, choose M here: the 179 module will be called omap3-rom-rng. 180 181 If unsure, say Y. 182 183config HW_RANDOM_OCTEON 184 tristate "Octeon Random Number Generator support" 185 depends on CAVIUM_OCTEON_SOC 186 default HW_RANDOM 187 ---help--- 188 This driver provides kernel-side support for the Random Number 189 Generator hardware found on Octeon processors. 190 191 To compile this driver as a module, choose M here: the 192 module will be called octeon-rng. 193 194 If unsure, say Y. 195 196config HW_RANDOM_PASEMI 197 tristate "PA Semi HW Random Number Generator support" 198 depends on PPC_PASEMI 199 default HW_RANDOM 200 ---help--- 201 This driver provides kernel-side support for the Random Number 202 Generator hardware found on PA Semi PWRficient SoCs. 203 204 To compile this driver as a module, choose M here: the 205 module will be called pasemi-rng. 206 207 If unsure, say Y. 208 209config HW_RANDOM_VIRTIO 210 tristate "VirtIO Random Number Generator support" 211 depends on VIRTIO 212 ---help--- 213 This driver provides kernel-side support for the virtual Random Number 214 Generator hardware. 215 216 To compile this driver as a module, choose M here: the 217 module will be called virtio-rng. If unsure, say N. 218 219config HW_RANDOM_TX4939 220 tristate "TX4939 Random Number Generator support" 221 depends on SOC_TX4939 222 default HW_RANDOM 223 ---help--- 224 This driver provides kernel-side support for the Random Number 225 Generator hardware found on TX4939 SoC. 226 227 To compile this driver as a module, choose M here: the 228 module will be called tx4939-rng. 229 230 If unsure, say Y. 231 232config HW_RANDOM_MXC_RNGA 233 tristate "Freescale i.MX RNGA Random Number Generator" 234 depends on SOC_IMX31 235 default HW_RANDOM 236 ---help--- 237 This driver provides kernel-side support for the Random Number 238 Generator hardware found on Freescale i.MX processors. 239 240 To compile this driver as a module, choose M here: the 241 module will be called mxc-rnga. 242 243 If unsure, say Y. 244 245config HW_RANDOM_IMX_RNGC 246 tristate "Freescale i.MX RNGC Random Number Generator" 247 depends on HAS_IOMEM && HAVE_CLK 248 depends on SOC_IMX25 || COMPILE_TEST 249 default HW_RANDOM 250 ---help--- 251 This driver provides kernel-side support for the Random Number 252 Generator Version C hardware found on some Freescale i.MX 253 processors. Version B is also supported by this driver. 254 255 To compile this driver as a module, choose M here: the 256 module will be called imx-rngc. 257 258 If unsure, say Y. 259 260config HW_RANDOM_NOMADIK 261 tristate "ST-Ericsson Nomadik Random Number Generator support" 262 depends on ARCH_NOMADIK 263 default HW_RANDOM 264 ---help--- 265 This driver provides kernel-side support for the Random Number 266 Generator hardware found on ST-Ericsson SoCs (8815 and 8500). 267 268 To compile this driver as a module, choose M here: the 269 module will be called nomadik-rng. 270 271 If unsure, say Y. 272 273config HW_RANDOM_PSERIES 274 tristate "pSeries HW Random Number Generator support" 275 depends on PPC64 && IBMVIO 276 default HW_RANDOM 277 ---help--- 278 This driver provides kernel-side support for the Random Number 279 Generator hardware found on POWER7+ machines and above 280 281 To compile this driver as a module, choose M here: the 282 module will be called pseries-rng. 283 284 If unsure, say Y. 285 286config HW_RANDOM_POWERNV 287 tristate "PowerNV Random Number Generator support" 288 depends on PPC_POWERNV 289 default HW_RANDOM 290 ---help--- 291 This is the driver for Random Number Generator hardware found 292 in POWER7+ and above machines for PowerNV platform. 293 294 To compile this driver as a module, choose M here: the 295 module will be called powernv-rng. 296 297 If unsure, say Y. 298 299config HW_RANDOM_HISI 300 tristate "Hisilicon Random Number Generator support" 301 depends on HW_RANDOM && ARCH_HISI 302 default HW_RANDOM 303 ---help--- 304 This driver provides kernel-side support for the Random Number 305 Generator hardware found on Hisilicon Hip04 and Hip05 SoC. 306 307 To compile this driver as a module, choose M here: the 308 module will be called hisi-rng. 309 310 If unsure, say Y. 311 312config HW_RANDOM_HISI_V2 313 tristate "HiSilicon True Random Number Generator V2 support" 314 depends on HW_RANDOM && ARM64 && ACPI 315 default HW_RANDOM 316 help 317 This driver provides kernel-side support for the True Random Number 318 Generator V2 hardware found on HiSilicon Hi1620 SoC. 319 320 To compile this driver as a module, choose M here: the 321 module will be called hisi-trng-v2. 322 323 If unsure, say Y. 324 325config HW_RANDOM_ST 326 tristate "ST Microelectronics HW Random Number Generator support" 327 depends on HW_RANDOM && ARCH_STI 328 ---help--- 329 This driver provides kernel-side support for the Random Number 330 Generator hardware found on STi series of SoCs. 331 332 To compile this driver as a module, choose M here: the 333 module will be called st-rng. 334 335config HW_RANDOM_XGENE 336 tristate "APM X-Gene True Random Number Generator (TRNG) support" 337 depends on HW_RANDOM && ARCH_XGENE 338 default HW_RANDOM 339 ---help--- 340 This driver provides kernel-side support for the Random Number 341 Generator hardware found on APM X-Gene SoC. 342 343 To compile this driver as a module, choose M here: the 344 module will be called xgene_rng. 345 346 If unsure, say Y. 347 348config HW_RANDOM_STM32 349 tristate "STMicroelectronics STM32 random number generator" 350 depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST) 351 depends on HAS_IOMEM 352 default HW_RANDOM 353 help 354 This driver provides kernel-side support for the Random Number 355 Generator hardware found on STM32 microcontrollers. 356 357 To compile this driver as a module, choose M here: the 358 module will be called stm32-rng. 359 360 If unsure, say N. 361 362config HW_RANDOM_PIC32 363 tristate "Microchip PIC32 Random Number Generator support" 364 depends on HW_RANDOM && MACH_PIC32 365 default y 366 ---help--- 367 This driver provides kernel-side support for the Random Number 368 Generator hardware found on a PIC32. 369 370 To compile this driver as a module, choose M here. the 371 module will be called pic32-rng. 372 373 If unsure, say Y. 374 375config HW_RANDOM_MESON 376 tristate "Amlogic Meson Random Number Generator support" 377 depends on HW_RANDOM 378 depends on ARCH_MESON || COMPILE_TEST 379 default y 380 ---help--- 381 This driver provides kernel-side support for the Random Number 382 Generator hardware found on Amlogic Meson SoCs. 383 384 To compile this driver as a module, choose M here. the 385 module will be called meson-rng. 386 387 If unsure, say Y. 388 389config HW_RANDOM_CAVIUM 390 tristate "Cavium ThunderX Random Number Generator support" 391 depends on HW_RANDOM && PCI && (ARM64 || (COMPILE_TEST && 64BIT)) 392 default HW_RANDOM 393 ---help--- 394 This driver provides kernel-side support for the Random Number 395 Generator hardware found on Cavium SoCs. 396 397 To compile this driver as a module, choose M here: the 398 module will be called cavium_rng. 399 400 If unsure, say Y. 401 402config HW_RANDOM_MTK 403 tristate "Mediatek Random Number Generator support" 404 depends on HW_RANDOM 405 depends on ARCH_MEDIATEK || COMPILE_TEST 406 default y 407 ---help--- 408 This driver provides kernel-side support for the Random Number 409 Generator hardware found on Mediatek SoCs. 410 411 To compile this driver as a module, choose M here. the 412 module will be called mtk-rng. 413 414 If unsure, say Y. 415 416config HW_RANDOM_S390 417 tristate "S390 True Random Number Generator support" 418 depends on S390 419 default HW_RANDOM 420 ---help--- 421 This driver provides kernel-side support for the True 422 Random Number Generator available as CPACF extension 423 on modern s390 hardware platforms. 424 425 To compile this driver as a module, choose M here: the 426 module will be called s390-trng. 427 428 If unsure, say Y. 429 430config HW_RANDOM_EXYNOS 431 tristate "Samsung Exynos True Random Number Generator support" 432 depends on ARCH_EXYNOS || COMPILE_TEST 433 default HW_RANDOM 434 ---help--- 435 This driver provides support for the True Random Number 436 Generator available in Exynos SoCs. 437 438 To compile this driver as a module, choose M here: the module 439 will be called exynos-trng. 440 441 If unsure, say Y. 442 443config HW_RANDOM_OPTEE 444 tristate "OP-TEE based Random Number Generator support" 445 depends on OPTEE 446 default HW_RANDOM 447 help 448 This driver provides support for OP-TEE based Random Number 449 Generator on ARM SoCs where hardware entropy sources are not 450 accessible to normal world (Linux). 451 452 To compile this driver as a module, choose M here: the module 453 will be called optee-rng. 454 455 If unsure, say Y. 456 457config HW_RANDOM_NPCM 458 tristate "NPCM Random Number Generator support" 459 depends on ARCH_NPCM || COMPILE_TEST 460 default HW_RANDOM 461 help 462 This driver provides support for the Random Number 463 Generator hardware available in Nuvoton NPCM SoCs. 464 465 To compile this driver as a module, choose M here: the 466 module will be called npcm-rng. 467 468 If unsure, say Y. 469 470config HW_RANDOM_KEYSTONE 471 depends on ARCH_KEYSTONE || COMPILE_TEST 472 default HW_RANDOM 473 tristate "TI Keystone NETCP SA Hardware random number generator" 474 help 475 This option enables Keystone's hardware random generator. 476 477endif # HW_RANDOM 478 479config UML_RANDOM 480 depends on UML 481 tristate "Hardware random number generator" 482 help 483 This option enables UML's "hardware" random number generator. It 484 attaches itself to the host's /dev/random, supplying as much entropy 485 as the host has, rather than the small amount the UML gets from its 486 own drivers. It registers itself as a standard hardware random number 487 generator, major 10, minor 183, and the canonical device name is 488 /dev/hwrng. 489 The way to make use of this is to install the rng-tools package 490 (check your distro, or download from 491 http://sourceforge.net/projects/gkernel/). rngd periodically reads 492 /dev/hwrng and injects the entropy into /dev/random. 493