1# 2# Hardware Random Number Generator (RNG) configuration 3# 4 5menuconfig 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 23if HW_RANDOM 24 25config 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 39config 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 52config 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 65config HW_RANDOM_ATMEL 66 tristate "Atmel Random Number Generator support" 67 depends on ARCH_AT91 && HAVE_CLK 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 78config 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 91config 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 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 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 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 ARCH_HAS_RNGA 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_NOMADIK 246 tristate "ST-Ericsson Nomadik Random Number Generator support" 247 depends on ARCH_NOMADIK 248 default HW_RANDOM 249 ---help--- 250 This driver provides kernel-side support for the Random Number 251 Generator hardware found on ST-Ericsson SoCs (8815 and 8500). 252 253 To compile this driver as a module, choose M here: the 254 module will be called nomadik-rng. 255 256 If unsure, say Y. 257 258config HW_RANDOM_PPC4XX 259 tristate "PowerPC 4xx generic true random number generator support" 260 depends on PPC && 4xx 261 default HW_RANDOM 262 ---help--- 263 This driver provides the kernel-side support for the TRNG hardware 264 found in the security function of some PowerPC 4xx SoCs. 265 266 To compile this driver as a module, choose M here: the 267 module will be called ppc4xx-rng. 268 269 If unsure, say N. 270 271config HW_RANDOM_PSERIES 272 tristate "pSeries HW Random Number Generator support" 273 depends on PPC64 && IBMVIO 274 default HW_RANDOM 275 ---help--- 276 This driver provides kernel-side support for the Random Number 277 Generator hardware found on POWER7+ machines and above 278 279 To compile this driver as a module, choose M here: the 280 module will be called pseries-rng. 281 282 If unsure, say Y. 283 284config HW_RANDOM_POWERNV 285 tristate "PowerNV Random Number Generator support" 286 depends on PPC_POWERNV 287 default HW_RANDOM 288 ---help--- 289 This is the driver for Random Number Generator hardware found 290 in POWER7+ and above machines for PowerNV platform. 291 292 To compile this driver as a module, choose M here: the 293 module will be called powernv-rng. 294 295 If unsure, say Y. 296 297config HW_RANDOM_EXYNOS 298 tristate "EXYNOS HW random number generator support" 299 depends on ARCH_EXYNOS 300 default HW_RANDOM 301 ---help--- 302 This driver provides kernel-side support for the Random Number 303 Generator hardware found on EXYNOS SOCs. 304 305 To compile this driver as a module, choose M here: the 306 module will be called exynos-rng. 307 308 If unsure, say Y. 309 310config HW_RANDOM_TPM 311 tristate "TPM HW Random Number Generator support" 312 depends on TCG_TPM 313 default HW_RANDOM 314 ---help--- 315 This driver provides kernel-side support for the Random Number 316 Generator in the Trusted Platform Module 317 318 To compile this driver as a module, choose M here: the 319 module will be called tpm-rng. 320 321 If unsure, say Y. 322 323config HW_RANDOM_MSM 324 tristate "Qualcomm SoCs Random Number Generator support" 325 depends on HW_RANDOM && ARCH_QCOM 326 default HW_RANDOM 327 ---help--- 328 This driver provides kernel-side support for the Random Number 329 Generator hardware found on Qualcomm SoCs. 330 331 To compile this driver as a module, choose M here. the 332 module will be called msm-rng. 333 334 If unsure, say Y. 335 336endif # HW_RANDOM 337 338config UML_RANDOM 339 depends on UML 340 tristate "Hardware random number generator" 341 help 342 This option enables UML's "hardware" random number generator. It 343 attaches itself to the host's /dev/random, supplying as much entropy 344 as the host has, rather than the small amount the UML gets from its 345 own drivers. It registers itself as a standard hardware random number 346 generator, major 10, minor 183, and the canonical device name is 347 /dev/hwrng. 348 The way to make use of this is to install the rng-tools package 349 (check your distro, or download from 350 http://sourceforge.net/projects/gkernel/). rngd periodically reads 351 /dev/hwrng and injects the entropy into /dev/random. 352