LXR linux/drivers/char/hw

   1#
   2# Hardware Random Number Generator (RNG) configuration
   3#
   4
   5config 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
  23config HW_RANDOM_TIMERIOMEM
  24        tristate "Timer IOMEM HW Random Number Generator support"
  25        depends on HW_RANDOM && HAS_IOMEM
  26        ---help---
  27          This driver provides kernel-side support for a generic Random
  28          Number Generator used by reading a 'dumb' iomem address that
  29          is to be read no faster than, for example, once a second;
  30          the default FPGA bitstream on the TS-7800 has such functionality.
  31
  32          To compile this driver as a module, choose M here: the
  33          module will be called timeriomem-rng.
  34
  35          If unsure, say Y.
  36
  37config HW_RANDOM_INTEL
  38        tristate "Intel HW Random Number Generator support"
  39        depends on HW_RANDOM && (X86 || IA64) && PCI
  40        default HW_RANDOM
  41        ---help---
  42          This driver provides kernel-side support for the Random Number
  43          Generator hardware found on Intel i8xx-based motherboards.
  44
  45          To compile this driver as a module, choose M here: the
  46          module will be called intel-rng.
  47
  48          If unsure, say Y.
  49
  50config HW_RANDOM_AMD
  51        tristate "AMD HW Random Number Generator support"
  52        depends on HW_RANDOM && (X86 || PPC_MAPLE) && PCI
  53        default HW_RANDOM
  54        ---help---
  55          This driver provides kernel-side support for the Random Number
  56          Generator hardware found on AMD 76x-based motherboards.
  57
  58          To compile this driver as a module, choose M here: the
  59          module will be called amd-rng.
  60
  61          If unsure, say Y.
  62
  63config HW_RANDOM_ATMEL
  64        tristate "Atmel Random Number Generator support"
  65        depends on HW_RANDOM && HAVE_CLK
  66        default (HW_RANDOM && ARCH_AT91)
  67        ---help---
  68          This driver provides kernel-side support for the Random Number
  69          Generator hardware found on Atmel AT91 devices.
  70
  71          To compile this driver as a module, choose M here: the
  72          module will be called atmel-rng.
  73
  74          If unsure, say Y.
  75
  76config HW_RANDOM_BCM63XX
  77        tristate "Broadcom BCM63xx Random Number Generator support"
  78        depends on HW_RANDOM && BCM63XX
  79        default HW_RANDOM
  80        ---help---
  81          This driver provides kernel-side support for the Random Number
  82          Generator hardware found on the Broadcom BCM63xx SoCs.
  83
  84          To compile this driver as a module, choose M here: the
  85          module will be called bcm63xx-rng
  86
  87          If unusure, say Y.
  88
  89
  90config HW_RANDOM_GEODE
  91        tristate "AMD Geode HW Random Number Generator support"
  92        depends on HW_RANDOM && X86_32 && PCI
  93        default HW_RANDOM
  94        ---help---
  95          This driver provides kernel-side support for the Random Number
  96          Generator hardware found on the AMD Geode LX.
  97
  98          To compile this driver as a module, choose M here: the
  99          module will be called geode-rng.
 100
 101          If unsure, say Y.
 102
 103config HW_RANDOM_N2RNG
 104        tristate "Niagara2 Random Number Generator support"
 105        depends on HW_RANDOM && SPARC64
 106        default HW_RANDOM
 107        ---help---
 108          This driver provides kernel-side support for the Random Number
 109          Generator hardware found on Niagara2 cpus.
 110
 111          To compile this driver as a module, choose M here: the
 112          module will be called n2-rng.
 113
 114          If unsure, say Y.
 115
 116config HW_RANDOM_VIA
 117        tristate "VIA HW Random Number Generator support"
 118        depends on HW_RANDOM && X86
 119        default HW_RANDOM
 120        ---help---
 121          This driver provides kernel-side support for the Random Number
 122          Generator hardware found on VIA based motherboards.
 123
 124          To compile this driver as a module, choose M here: the
 125          module will be called via-rng.
 126
 127          If unsure, say Y.
 128
 129config HW_RANDOM_IXP4XX
 130        tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support"
 131        depends on HW_RANDOM && ARCH_IXP4XX
 132        default HW_RANDOM
 133        ---help---
 134          This driver provides kernel-side support for the Pseudo-Random
 135          Number Generator hardware found on the Intel IXP45x/46x NPU.
 136
 137          To compile this driver as a module, choose M here: the
 138          module will be called ixp4xx-rng.
 139
 140          If unsure, say Y.
 141
 142config HW_RANDOM_OMAP
 143        tristate "OMAP Random Number Generator support"
 144        depends on HW_RANDOM && (ARCH_OMAP16XX || ARCH_OMAP2)
 145        default HW_RANDOM
 146        ---help---
 147          This driver provides kernel-side support for the Random Number
 148          Generator hardware found on OMAP16xx and OMAP24xx multimedia
 149          processors.
 150
 151          To compile this driver as a module, choose M here: the
 152          module will be called omap-rng.
 153
 154          If unsure, say Y.
 155
 156config HW_RANDOM_OCTEON
 157        tristate "Octeon Random Number Generator support"
 158        depends on HW_RANDOM && CPU_CAVIUM_OCTEON
 159        default HW_RANDOM
 160        ---help---
 161          This driver provides kernel-side support for the Random Number
 162          Generator hardware found on Octeon processors.
 163
 164          To compile this driver as a module, choose M here: the
 165          module will be called octeon-rng.
 166
 167          If unsure, say Y.
 168
 169config HW_RANDOM_PASEMI
 170        tristate "PA Semi HW Random Number Generator support"
 171        depends on HW_RANDOM && PPC_PASEMI
 172        default HW_RANDOM
 173        ---help---
 174          This driver provides kernel-side support for the Random Number
 175          Generator hardware found on PA Semi PWRficient SoCs.
 176
 177          To compile this driver as a module, choose M here: the
 178          module will be called pasemi-rng.
 179
 180          If unsure, say Y.
 181
 182config HW_RANDOM_VIRTIO
 183        tristate "VirtIO Random Number Generator support"
 184        depends on HW_RANDOM && VIRTIO
 185        ---help---
 186          This driver provides kernel-side support for the virtual Random Number
 187          Generator hardware.
 188
 189          To compile this driver as a module, choose M here: the
 190          module will be called virtio-rng.  If unsure, say N.
 191
 192config HW_RANDOM_TX4939
 193        tristate "TX4939 Random Number Generator support"
 194        depends on HW_RANDOM && SOC_TX4939
 195        default HW_RANDOM
 196        ---help---
 197          This driver provides kernel-side support for the Random Number
 198          Generator hardware found on TX4939 SoC.
 199
 200          To compile this driver as a module, choose M here: the
 201          module will be called tx4939-rng.
 202
 203          If unsure, say Y.
 204
 205config HW_RANDOM_MXC_RNGA
 206        tristate "Freescale i.MX RNGA Random Number Generator"
 207        depends on HW_RANDOM && ARCH_HAS_RNGA
 208        ---help---
 209          This driver provides kernel-side support for the Random Number
 210          Generator hardware found on Freescale i.MX processors.
 211
 212          To compile this driver as a module, choose M here: the
 213          module will be called mxc-rnga.
 214
 215          If unsure, say Y.
 216
 217config HW_RANDOM_NOMADIK
 218        tristate "ST-Ericsson Nomadik Random Number Generator support"
 219        depends on HW_RANDOM && ARCH_NOMADIK
 220        ---help---
 221          This driver provides kernel-side support for the Random Number
 222          Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
 223
 224          To compile this driver as a module, choose M here: the
 225          module will be called nomadik-rng.
 226
 227          If unsure, say Y.
 228
 229config HW_RANDOM_PICOXCELL
 230        tristate "Picochip picoXcell true random number generator support"
 231        depends on HW_RANDOM && ARCH_PICOXCELL && PICOXCELL_PC3X3
 232        ---help---
 233          This driver provides kernel-side support for the Random Number
 234          Generator hardware found on Picochip PC3x3 and later devices.
 235
 236          To compile this driver as a module, choose M here: the
 237          module will be called picoxcell-rng.
 238
 239          If unsure, say Y.
 240
 241config HW_RANDOM_PPC4XX
 242        tristate "PowerPC 4xx generic true random number generator support"
 243        depends on HW_RANDOM && PPC && 4xx
 244        ---help---
 245         This driver provides the kernel-side support for the TRNG hardware
 246         found in the security function of some PowerPC 4xx SoCs.
 247
 248         To compile this driver as a module, choose M here: the
 249         module will be called ppc4xx-rng.
 250
 251         If unsure, say N.
 252
 253config UML_RANDOM
 254        depends on UML
 255        tristate "Hardware random number generator"
 256        help
 257          This option enables UML's "hardware" random number generator.  It
 258          attaches itself to the host's /dev/random, supplying as much entropy
 259          as the host has, rather than the small amount the UML gets from its
 260          own drivers.  It registers itself as a standard hardware random number
 261          generator, major 10, minor 183, and the canonical device name is
 262          /dev/hwrng.
 263          The way to make use of this is to install the rng-tools package
 264          (check your distro, or download from
 265          http://sourceforge.net/projects/gkernel/).  rngd periodically reads
 266          /dev/hwrng and injects the entropy into /dev/random.
 267
 268config HW_RANDOM_PSERIES
 269        tristate "pSeries HW Random Number Generator support"
 270        depends on HW_RANDOM && PPC64 && IBMVIO
 271        default HW_RANDOM
 272        ---help---
 273          This driver provides kernel-side support for the Random Number
 274          Generator hardware found on POWER7+ machines and above
 275
 276          To compile this driver as a module, choose M here: the
 277          module will be called pseries-rng.
 278
 279          If unsure, say Y.
 280
 281config HW_RANDOM_EXYNOS
 282        tristate "EXYNOS HW random number generator support"
 283        depends on HW_RANDOM && HAS_IOMEM && HAVE_CLK
 284        ---help---
 285          This driver provides kernel-side support for the Random Number
 286          Generator hardware found on EXYNOS SOCs.
 287
 288          To compile this driver as a module, choose M here: the
 289          module will be called exynos-rng.
 290
 291          If unsure, say Y.
 292
 293config HW_RANDOM_TPM
 294        tristate "TPM HW Random Number Generator support"
 295        depends on HW_RANDOM && TCG_TPM
 296        default HW_RANDOM
 297        ---help---
 298          This driver provides kernel-side support for the Random Number
 299          Generator in the Trusted Platform Module
 300
 301          To compile this driver as a module, choose M here: the
 302          module will be called tpm-rng.
 303
 304          If unsure, say Y.
 305