drivers/char/hw_random/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Hardware Random Number Generator (RNG) configuration
   4 #
   5
   6 menuconfig 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
  22 if HW_RANDOM
  23
  24 config 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
  38 config 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
  51 config 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
  64 config 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
  77 config 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
  91 config HW_RANDOM_IPROC_RNG200
  92         tristate "Broadcom iProc/STB RNG200 support"
  93         depends on ARCH_BCM_IPROC || 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
 104 config 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
 117 config 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
 130 config 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
 143 config 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
 156 config 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
 170 config 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
 183 config 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
 196 config 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
 209 config 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
 219 config 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
 232 config 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
 245 config HW_RANDOM_IMX_RNGC
 246         tristate "Freescale i.MX RNGC Random Number Generator"
 247         depends on ARCH_MXC
 248         default HW_RANDOM
 249         ---help---
 250           This driver provides kernel-side support for the Random Number
 251           Generator Version C hardware found on some Freescale i.MX
 252           processors. Version B is also supported by this driver.
 253
 254           To compile this driver as a module, choose M here: the
 255           module will be called imx-rngc.
 256
 257           If unsure, say Y.
 258
 259 config HW_RANDOM_NOMADIK
 260         tristate "ST-Ericsson Nomadik Random Number Generator support"
 261         depends on ARCH_NOMADIK
 262         default HW_RANDOM
 263         ---help---
 264           This driver provides kernel-side support for the Random Number
 265           Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
 266
 267           To compile this driver as a module, choose M here: the
 268           module will be called nomadik-rng.
 269
 270           If unsure, say Y.
 271
 272 config HW_RANDOM_PSERIES
 273         tristate "pSeries HW Random Number Generator support"
 274         depends on PPC64 && IBMVIO
 275         default HW_RANDOM
 276         ---help---
 277           This driver provides kernel-side support for the Random Number
 278           Generator hardware found on POWER7+ machines and above
 279
 280           To compile this driver as a module, choose M here: the
 281           module will be called pseries-rng.
 282
 283           If unsure, say Y.
 284
 285 config HW_RANDOM_POWERNV
 286         tristate "PowerNV Random Number Generator support"
 287         depends on PPC_POWERNV
 288         default HW_RANDOM
 289         ---help---
 290           This is the driver for Random Number Generator hardware found
 291           in POWER7+ and above machines for PowerNV platform.
 292
 293           To compile this driver as a module, choose M here: the
 294           module will be called powernv-rng.
 295
 296           If unsure, say Y.
 297
 298 config HW_RANDOM_HISI
 299         tristate "Hisilicon Random Number Generator support"
 300         depends on HW_RANDOM && ARCH_HISI
 301         default HW_RANDOM
 302         ---help---
 303           This driver provides kernel-side support for the Random Number
 304           Generator hardware found on Hisilicon Hip04 and Hip05 SoC.
 305
 306           To compile this driver as a module, choose M here: the
 307           module will be called hisi-rng.
 308
 309           If unsure, say Y.
 310
 311 config HW_RANDOM_ST
 312         tristate "ST Microelectronics HW Random Number Generator support"
 313         depends on HW_RANDOM && ARCH_STI
 314         ---help---
 315           This driver provides kernel-side support for the Random Number
 316           Generator hardware found on STi series of SoCs.
 317
 318           To compile this driver as a module, choose M here: the
 319           module will be called st-rng.
 320
 321 config HW_RANDOM_XGENE
 322         tristate "APM X-Gene True Random Number Generator (TRNG) support"
 323         depends on HW_RANDOM && ARCH_XGENE
 324         default HW_RANDOM
 325         ---help---
 326           This driver provides kernel-side support for the Random Number
 327           Generator hardware found on APM X-Gene SoC.
 328
 329           To compile this driver as a module, choose M here: the
 330           module will be called xgene_rng.
 331
 332           If unsure, say Y.
 333
 334 config HW_RANDOM_STM32
 335         tristate "STMicroelectronics STM32 random number generator"
 336         depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST)
 337         depends on HAS_IOMEM
 338         default HW_RANDOM
 339         help
 340           This driver provides kernel-side support for the Random Number
 341           Generator hardware found on STM32 microcontrollers.
 342
 343           To compile this driver as a module, choose M here: the
 344           module will be called stm32-rng.
 345
 346           If unsure, say N.
 347
 348 config HW_RANDOM_PIC32
 349         tristate "Microchip PIC32 Random Number Generator support"
 350         depends on HW_RANDOM && MACH_PIC32
 351         default y
 352         ---help---
 353           This driver provides kernel-side support for the Random Number
 354           Generator hardware found on a PIC32.
 355
 356           To compile this driver as a module, choose M here. the
 357           module will be called pic32-rng.
 358
 359           If unsure, say Y.
 360
 361 config HW_RANDOM_MESON
 362         tristate "Amlogic Meson Random Number Generator support"
 363         depends on HW_RANDOM
 364         depends on ARCH_MESON || COMPILE_TEST
 365         default y
 366         ---help---
 367           This driver provides kernel-side support for the Random Number
 368           Generator hardware found on Amlogic Meson SoCs.
 369
 370           To compile this driver as a module, choose M here. the
 371           module will be called meson-rng.
 372
 373           If unsure, say Y.
 374
 375 config HW_RANDOM_CAVIUM
 376        tristate "Cavium ThunderX Random Number Generator support"
 377        depends on HW_RANDOM && PCI && (ARM64 || (COMPILE_TEST && 64BIT))
 378        default HW_RANDOM
 379        ---help---
 380          This driver provides kernel-side support for the Random Number
 381          Generator hardware found on Cavium SoCs.
 382
 383          To compile this driver as a module, choose M here: the
 384          module will be called cavium_rng.
 385
 386          If unsure, say Y.
 387
 388 config HW_RANDOM_MTK
 389         tristate "Mediatek Random Number Generator support"
 390         depends on HW_RANDOM
 391         depends on ARCH_MEDIATEK || COMPILE_TEST
 392         default y
 393         ---help---
 394           This driver provides kernel-side support for the Random Number
 395           Generator hardware found on Mediatek SoCs.
 396
 397           To compile this driver as a module, choose M here. the
 398           module will be called mtk-rng.
 399
 400           If unsure, say Y.
 401
 402 config HW_RANDOM_S390
 403         tristate "S390 True Random Number Generator support"
 404         depends on S390
 405         default HW_RANDOM
 406         ---help---
 407           This driver provides kernel-side support for the True
 408           Random Number Generator available as CPACF extension
 409           on modern s390 hardware platforms.
 410
 411           To compile this driver as a module, choose M here: the
 412           module will be called s390-trng.
 413
 414           If unsure, say Y.
 415
 416 config HW_RANDOM_EXYNOS
 417         tristate "Samsung Exynos True Random Number Generator support"
 418         depends on ARCH_EXYNOS || COMPILE_TEST
 419         default HW_RANDOM
 420         ---help---
 421           This driver provides support for the True Random Number
 422           Generator available in Exynos SoCs.
 423
 424           To compile this driver as a module, choose M here: the module
 425           will be called exynos-trng.
 426
 427           If unsure, say Y.
 428
 429 config HW_RANDOM_OPTEE
 430         tristate "OP-TEE based Random Number Generator support"
 431         depends on OPTEE
 432         default HW_RANDOM
 433         help
 434           This  driver provides support for OP-TEE based Random Number
 435           Generator on ARM SoCs where hardware entropy sources are not
 436           accessible to normal world (Linux).
 437
 438           To compile this driver as a module, choose M here: the module
 439           will be called optee-rng.
 440
 441           If unsure, say Y.
 442
 443 endif # HW_RANDOM
 444
 445 config UML_RANDOM
 446         depends on UML
 447         tristate "Hardware random number generator"
 448         help
 449           This option enables UML's "hardware" random number generator.  It
 450           attaches itself to the host's /dev/random, supplying as much entropy
 451           as the host has, rather than the small amount the UML gets from its
 452           own drivers.  It registers itself as a standard hardware random number
 453           generator, major 10, minor 183, and the canonical device name is
 454           /dev/hwrng.
 455           The way to make use of this is to install the rng-tools package
 456           (check your distro, or download from
 457           http://sourceforge.net/projects/gkernel/).  rngd periodically reads
 458           /dev/hwrng and injects the entropy into /dev/random.
 459
 460 config HW_RANDOM_KEYSTONE
 461         depends on ARCH_KEYSTONE
 462         default HW_RANDOM
 463         tristate "TI Keystone NETCP SA Hardware random number generator"
 464         help
 465           This option enables Keystone's hardware random generator.