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/hw_random, 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 HAVE_CLK
  68         default (HW_RANDOM && ARCH_AT91)
  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
  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_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
 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 and AM33xx/AM43xx
 163           multimedia processors.
 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 ARCH_HAS_RNGA
 235         ---help---
 236           This driver provides kernel-side support for the Random Number
 237           Generator hardware found on Freescale i.MX processors.
 238
 239           To compile this driver as a module, choose M here: the
 240           module will be called mxc-rnga.
 241
 242           If unsure, say Y.
 243
 244 config HW_RANDOM_NOMADIK
 245         tristate "ST-Ericsson Nomadik Random Number Generator support"
 246         depends on ARCH_NOMADIK
 247         ---help---
 248           This driver provides kernel-side support for the Random Number
 249           Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
 250
 251           To compile this driver as a module, choose M here: the
 252           module will be called nomadik-rng.
 253
 254           If unsure, say Y.
 255
 256 config HW_RANDOM_PICOXCELL
 257         tristate "Picochip picoXcell true random number generator support"
 258         depends on ARCH_PICOXCELL && PICOXCELL_PC3X3
 259         ---help---
 260           This driver provides kernel-side support for the Random Number
 261           Generator hardware found on Picochip PC3x3 and later devices.
 262
 263           To compile this driver as a module, choose M here: the
 264           module will be called picoxcell-rng.
 265
 266           If unsure, say Y.
 267
 268 config HW_RANDOM_PPC4XX
 269         tristate "PowerPC 4xx generic true random number generator support"
 270         depends on PPC && 4xx
 271         ---help---
 272          This driver provides the kernel-side support for the TRNG hardware
 273          found in the security function of some PowerPC 4xx SoCs.
 274
 275          To compile this driver as a module, choose M here: the
 276          module will be called ppc4xx-rng.
 277
 278          If unsure, say N.
 279
 280 config HW_RANDOM_PSERIES
 281         tristate "pSeries HW Random Number Generator support"
 282         depends on PPC64 && IBMVIO
 283         default HW_RANDOM
 284         ---help---
 285           This driver provides kernel-side support for the Random Number
 286           Generator hardware found on POWER7+ machines and above
 287
 288           To compile this driver as a module, choose M here: the
 289           module will be called pseries-rng.
 290
 291           If unsure, say Y.
 292
 293 config HW_RANDOM_POWERNV
 294         tristate "PowerNV Random Number Generator support"
 295         depends on PPC_POWERNV
 296         default HW_RANDOM
 297         ---help---
 298           This is the driver for Random Number Generator hardware found
 299           in POWER7+ and above machines for PowerNV platform.
 300
 301           To compile this driver as a module, choose M here: the
 302           module will be called powernv-rng.
 303
 304           If unsure, say Y.
 305
 306 config HW_RANDOM_EXYNOS
 307         tristate "EXYNOS HW random number generator support"
 308         depends on HAS_IOMEM && HAVE_CLK
 309         ---help---
 310           This driver provides kernel-side support for the Random Number
 311           Generator hardware found on EXYNOS SOCs.
 312
 313           To compile this driver as a module, choose M here: the
 314           module will be called exynos-rng.
 315
 316           If unsure, say Y.
 317
 318 config HW_RANDOM_TPM
 319         tristate "TPM HW Random Number Generator support"
 320         depends on TCG_TPM
 321         default HW_RANDOM
 322         ---help---
 323           This driver provides kernel-side support for the Random Number
 324           Generator in the Trusted Platform Module
 325
 326           To compile this driver as a module, choose M here: the
 327           module will be called tpm-rng.
 328
 329           If unsure, say Y.
 330
 331 config HW_RANDOM_MSM
 332         tristate "Qualcomm MSM Random Number Generator support"
 333         depends on ARCH_MSM
 334         ---help---
 335           This driver provides kernel-side support for the Random Number
 336           Generator hardware found on Qualcomm MSM SoCs.
 337
 338           To compile this driver as a module, choose M here. the
 339           module will be called msm-rng.
 340
 341           If unsure, say Y.
 342
 343 endif # HW_RANDOM
 344
 345 config UML_RANDOM
 346         depends on UML
 347         tristate "Hardware random number generator"
 348         help
 349           This option enables UML's "hardware" random number generator.  It
 350           attaches itself to the host's /dev/random, supplying as much entropy
 351           as the host has, rather than the small amount the UML gets from its
 352           own drivers.  It registers itself as a standard hardware random number
 353           generator, major 10, minor 183, and the canonical device name is
 354           /dev/hwrng.
 355           The way to make use of this is to install the rng-tools package
 356           (check your distro, or download from
 357           http://sourceforge.net/projects/gkernel/).  rngd periodically reads
 358           /dev/hwrng and injects the entropy into /dev/random.