drivers/char/hw_random/Kconfig

   1 #
   2 # Hardware Random Number Generator (RNG) configuration
   3 #
   4
   5 menuconfig HW_RANDOM
   6         tristate "Hardware Random Number Generator Core support"
   7         default m
   8         ---help---
   9           Hardware Random Number Generator Core infrastructure.
  10
  11           To compile this driver as a module, choose M here: the
  12           module will be called rng-core.  This provides a device
  13           that's usually called /dev/hwrng, and which exposes one
  14           of possibly several hardware random number generators.
  15
  16           These hardware random number generators do not feed directly
  17           into the kernel's random number generator.  That is usually
  18           handled by the "rngd" daemon.  Documentation/hw_random.txt
  19           has more information.
  20
  21           If unsure, say Y.
  22
  23 if HW_RANDOM
  24
  25 config HW_RANDOM_TIMERIOMEM
  26         tristate "Timer IOMEM HW Random Number Generator support"
  27         depends on HAS_IOMEM
  28         ---help---
  29           This driver provides kernel-side support for a generic Random
  30           Number Generator used by reading a 'dumb' iomem address that
  31           is to be read no faster than, for example, once a second;
  32           the default FPGA bitstream on the TS-7800 has such functionality.
  33
  34           To compile this driver as a module, choose M here: the
  35           module will be called timeriomem-rng.
  36
  37           If unsure, say Y.
  38
  39 config HW_RANDOM_INTEL
  40         tristate "Intel HW Random Number Generator support"
  41         depends on (X86 || IA64) && PCI
  42         default HW_RANDOM
  43         ---help---
  44           This driver provides kernel-side support for the Random Number
  45           Generator hardware found on Intel i8xx-based motherboards.
  46
  47           To compile this driver as a module, choose M here: the
  48           module will be called intel-rng.
  49
  50           If unsure, say Y.
  51
  52 config HW_RANDOM_AMD
  53         tristate "AMD HW Random Number Generator support"
  54         depends on (X86 || PPC_MAPLE) && PCI
  55         default HW_RANDOM
  56         ---help---
  57           This driver provides kernel-side support for the Random Number
  58           Generator hardware found on AMD 76x-based motherboards.
  59
  60           To compile this driver as a module, choose M here: the
  61           module will be called amd-rng.
  62
  63           If unsure, say Y.
  64
  65 config HW_RANDOM_ATMEL
  66         tristate "Atmel Random Number Generator support"
  67         depends on ARCH_AT91 && HAVE_CLK && OF
  68         default HW_RANDOM
  69         ---help---
  70           This driver provides kernel-side support for the Random Number
  71           Generator hardware found on Atmel AT91 devices.
  72
  73           To compile this driver as a module, choose M here: the
  74           module will be called atmel-rng.
  75
  76           If unsure, say Y.
  77
  78 config HW_RANDOM_BCM63XX
  79         tristate "Broadcom BCM63xx Random Number Generator support"
  80         depends on 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 BCM63xx SoCs.
  85
  86           To compile this driver as a module, choose M here: the
  87           module will be called bcm63xx-rng
  88
  89           If unusure, say Y.
  90
  91 config HW_RANDOM_BCM2835
  92         tristate "Broadcom BCM2835 Random Number Generator support"
  93         depends on ARCH_BCM2835
  94         default HW_RANDOM
  95         ---help---
  96           This driver provides kernel-side support for the Random Number
  97           Generator hardware found on the Broadcom BCM2835 SoCs.
  98
  99           To compile this driver as a module, choose M here: the
 100           module will be called bcm2835-rng
 101
 102           If unsure, say Y.
 103
 104 config HW_RANDOM_IPROC_RNG200
 105         tristate "Broadcom iProc RNG200 support"
 106         depends on ARCH_BCM_IPROC
 107         default HW_RANDOM
 108         ---help---
 109           This driver provides kernel-side support for the RNG200
 110           hardware found on the Broadcom iProc SoCs.
 111
 112           To compile this driver as a module, choose M here: the
 113           module will be called iproc-rng200
 114
 115           If unsure, say Y.
 116
 117 config HW_RANDOM_GEODE
 118         tristate "AMD Geode HW Random Number Generator support"
 119         depends on X86_32 && PCI
 120         default HW_RANDOM
 121         ---help---
 122           This driver provides kernel-side support for the Random Number
 123           Generator hardware found on the AMD Geode LX.
 124
 125           To compile this driver as a module, choose M here: the
 126           module will be called geode-rng.
 127
 128           If unsure, say Y.
 129
 130 config HW_RANDOM_N2RNG
 131         tristate "Niagara2 Random Number Generator support"
 132         depends on SPARC64
 133         default HW_RANDOM
 134         ---help---
 135           This driver provides kernel-side support for the Random Number
 136           Generator hardware found on Niagara2 cpus.
 137
 138           To compile this driver as a module, choose M here: the
 139           module will be called n2-rng.
 140
 141           If unsure, say Y.
 142
 143 config HW_RANDOM_VIA
 144         tristate "VIA HW Random Number Generator support"
 145         depends on X86
 146         default HW_RANDOM
 147         ---help---
 148           This driver provides kernel-side support for the Random Number
 149           Generator hardware found on VIA based motherboards.
 150
 151           To compile this driver as a module, choose M here: the
 152           module will be called via-rng.
 153
 154           If unsure, say Y.
 155
 156 config HW_RANDOM_IXP4XX
 157         tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support"
 158         depends on ARCH_IXP4XX
 159         default HW_RANDOM
 160         ---help---
 161           This driver provides kernel-side support for the Pseudo-Random
 162           Number Generator hardware found on the Intel IXP45x/46x NPU.
 163
 164           To compile this driver as a module, choose M here: the
 165           module will be called ixp4xx-rng.
 166
 167           If unsure, say Y.
 168
 169 config HW_RANDOM_OMAP
 170         tristate "OMAP Random Number Generator support"
 171         depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS
 172         default HW_RANDOM
 173         ---help---
 174           This driver provides kernel-side support for the Random Number
 175           Generator hardware found on OMAP16xx, OMAP2/3/4/5 and AM33xx/AM43xx
 176           multimedia processors.
 177
 178           To compile this driver as a module, choose M here: the
 179           module will be called omap-rng.
 180
 181           If unsure, say Y.
 182
 183 config HW_RANDOM_OMAP3_ROM
 184         tristate "OMAP3 ROM Random Number Generator support"
 185         depends on ARCH_OMAP3
 186         default HW_RANDOM
 187         ---help---
 188           This driver provides kernel-side support for the Random Number
 189           Generator hardware found on OMAP34xx processors.
 190
 191           To compile this driver as a module, choose M here: the
 192           module will be called omap3-rom-rng.
 193
 194           If unsure, say Y.
 195
 196 config HW_RANDOM_OCTEON
 197         tristate "Octeon Random Number Generator support"
 198         depends on CAVIUM_OCTEON_SOC
 199         default HW_RANDOM
 200         ---help---
 201           This driver provides kernel-side support for the Random Number
 202           Generator hardware found on Octeon processors.
 203
 204           To compile this driver as a module, choose M here: the
 205           module will be called octeon-rng.
 206
 207           If unsure, say Y.
 208
 209 config HW_RANDOM_PASEMI
 210         tristate "PA Semi HW Random Number Generator support"
 211         depends on PPC_PASEMI
 212         default HW_RANDOM
 213         ---help---
 214           This driver provides kernel-side support for the Random Number
 215           Generator hardware found on PA Semi PWRficient SoCs.
 216
 217           To compile this driver as a module, choose M here: the
 218           module will be called pasemi-rng.
 219
 220           If unsure, say Y.
 221
 222 config HW_RANDOM_VIRTIO
 223         tristate "VirtIO Random Number Generator support"
 224         depends on VIRTIO
 225         ---help---
 226           This driver provides kernel-side support for the virtual Random Number
 227           Generator hardware.
 228
 229           To compile this driver as a module, choose M here: the
 230           module will be called virtio-rng.  If unsure, say N.
 231
 232 config HW_RANDOM_TX4939
 233         tristate "TX4939 Random Number Generator support"
 234         depends on SOC_TX4939
 235         default HW_RANDOM
 236         ---help---
 237           This driver provides kernel-side support for the Random Number
 238           Generator hardware found on TX4939 SoC.
 239
 240           To compile this driver as a module, choose M here: the
 241           module will be called tx4939-rng.
 242
 243           If unsure, say Y.
 244
 245 config HW_RANDOM_MXC_RNGA
 246         tristate "Freescale i.MX RNGA Random Number Generator"
 247         depends on ARCH_HAS_RNGA
 248         default HW_RANDOM
 249         ---help---
 250           This driver provides kernel-side support for the Random Number
 251           Generator hardware found on Freescale i.MX processors.
 252
 253           To compile this driver as a module, choose M here: the
 254           module will be called mxc-rnga.
 255
 256           If unsure, say Y.
 257
 258 config HW_RANDOM_NOMADIK
 259         tristate "ST-Ericsson Nomadik Random Number Generator support"
 260         depends on ARCH_NOMADIK
 261         default HW_RANDOM
 262         ---help---
 263           This driver provides kernel-side support for the Random Number
 264           Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
 265
 266           To compile this driver as a module, choose M here: the
 267           module will be called nomadik-rng.
 268
 269           If unsure, say Y.
 270
 271 config HW_RANDOM_PPC4XX
 272         tristate "PowerPC 4xx generic true random number generator support"
 273         depends on PPC && 4xx
 274         default HW_RANDOM
 275         ---help---
 276          This driver provides the kernel-side support for the TRNG hardware
 277          found in the security function of some PowerPC 4xx SoCs.
 278
 279          To compile this driver as a module, choose M here: the
 280          module will be called ppc4xx-rng.
 281
 282          If unsure, say N.
 283
 284 config HW_RANDOM_PSERIES
 285         tristate "pSeries HW Random Number Generator support"
 286         depends on PPC64 && IBMVIO
 287         default HW_RANDOM
 288         ---help---
 289           This driver provides kernel-side support for the Random Number
 290           Generator hardware found on POWER7+ machines and above
 291
 292           To compile this driver as a module, choose M here: the
 293           module will be called pseries-rng.
 294
 295           If unsure, say Y.
 296
 297 config HW_RANDOM_POWERNV
 298         tristate "PowerNV Random Number Generator support"
 299         depends on PPC_POWERNV
 300         default HW_RANDOM
 301         ---help---
 302           This is the driver for Random Number Generator hardware found
 303           in POWER7+ and above machines for PowerNV platform.
 304
 305           To compile this driver as a module, choose M here: the
 306           module will be called powernv-rng.
 307
 308           If unsure, say Y.
 309
 310 config HW_RANDOM_EXYNOS
 311         tristate "EXYNOS HW random number generator support"
 312         depends on ARCH_EXYNOS
 313         default HW_RANDOM
 314         ---help---
 315           This driver provides kernel-side support for the Random Number
 316           Generator hardware found on EXYNOS SOCs.
 317
 318           To compile this driver as a module, choose M here: the
 319           module will be called exynos-rng.
 320
 321           If unsure, say Y.
 322
 323 config HW_RANDOM_TPM
 324         tristate "TPM HW Random Number Generator support"
 325         depends on TCG_TPM
 326         default HW_RANDOM
 327         ---help---
 328           This driver provides kernel-side support for the Random Number
 329           Generator in the Trusted Platform Module
 330
 331           To compile this driver as a module, choose M here: the
 332           module will be called tpm-rng.
 333
 334           If unsure, say Y.
 335
 336 config HW_RANDOM_MSM
 337         tristate "Qualcomm SoCs Random Number Generator support"
 338         depends on HW_RANDOM && ARCH_QCOM
 339         default HW_RANDOM
 340         ---help---
 341           This driver provides kernel-side support for the Random Number
 342           Generator hardware found on Qualcomm SoCs.
 343
 344           To compile this driver as a module, choose M here. the
 345           module will be called msm-rng.
 346
 347           If unsure, say Y.
 348
 349 config HW_RANDOM_ST
 350         tristate "ST Microelectronics HW Random Number Generator support"
 351         depends on HW_RANDOM && ARCH_STI
 352         ---help---
 353           This driver provides kernel-side support for the Random Number
 354           Generator hardware found on STi series of SoCs.
 355
 356           To compile this driver as a module, choose M here: the
 357           module will be called st-rng.
 358
 359 config HW_RANDOM_XGENE
 360         tristate "APM X-Gene True Random Number Generator (TRNG) support"
 361         depends on HW_RANDOM && ARCH_XGENE
 362         default HW_RANDOM
 363         ---help---
 364           This driver provides kernel-side support for the Random Number
 365           Generator hardware found on APM X-Gene SoC.
 366
 367           To compile this driver as a module, choose M here: the
 368           module will be called xgene_rng.
 369
 370           If unsure, say Y.
 371
 372 config HW_RANDOM_STM32
 373         tristate "STMicroelectronics STM32 random number generator"
 374         depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST)
 375         depends on HAS_IOMEM
 376         help
 377           This driver provides kernel-side support for the Random Number
 378           Generator hardware found on STM32 microcontrollers.
 379
 380           To compile this driver as a module, choose M here: the
 381           module will be called stm32-rng.
 382
 383           If unsure, say N.
 384
 385 config HW_RANDOM_PIC32
 386         tristate "Microchip PIC32 Random Number Generator support"
 387         depends on HW_RANDOM && MACH_PIC32
 388         default y
 389         ---help---
 390           This driver provides kernel-side support for the Random Number
 391           Generator hardware found on a PIC32.
 392
 393           To compile this driver as a module, choose M here. the
 394           module will be called pic32-rng.
 395
 396           If unsure, say Y.
 397
 398 endif # HW_RANDOM
 399
 400 config UML_RANDOM
 401         depends on UML
 402         tristate "Hardware random number generator"
 403         help
 404           This option enables UML's "hardware" random number generator.  It
 405           attaches itself to the host's /dev/random, supplying as much entropy
 406           as the host has, rather than the small amount the UML gets from its
 407           own drivers.  It registers itself as a standard hardware random number
 408           generator, major 10, minor 183, and the canonical device name is
 409           /dev/hwrng.
 410           The way to make use of this is to install the rng-tools package
 411           (check your distro, or download from
 412           http://sourceforge.net/projects/gkernel/).  rngd periodically reads
 413           /dev/hwrng and injects the entropy into /dev/random.