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 && ARCH_AT91SAM9G45 66 default HW_RANDOM 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_GEODE 77 tristate "AMD Geode HW Random Number Generator support" 78 depends on HW_RANDOM && X86_32 && PCI 79 default HW_RANDOM 80 ---help--- 81 This driver provides kernel-side support for the Random Number 82 Generator hardware found on the AMD Geode LX. 83 84 To compile this driver as a module, choose M here: the 85 module will be called geode-rng. 86 87 If unsure, say Y. 88 89config HW_RANDOM_N2RNG 90 tristate "Niagara2 Random Number Generator support" 91 depends on HW_RANDOM && SPARC64 92 default HW_RANDOM 93 ---help--- 94 This driver provides kernel-side support for the Random Number 95 Generator hardware found on Niagara2 cpus. 96 97 To compile this driver as a module, choose M here: the 98 module will be called n2-rng. 99 100 If unsure, say Y. 101 102config HW_RANDOM_VIA 103 tristate "VIA HW Random Number Generator support" 104 depends on HW_RANDOM && X86 105 default HW_RANDOM 106 ---help--- 107 This driver provides kernel-side support for the Random Number 108 Generator hardware found on VIA based motherboards. 109 110 To compile this driver as a module, choose M here: the 111 module will be called via-rng. 112 113 If unsure, say Y. 114 115config HW_RANDOM_IXP4XX 116 tristate "Intel IXP4xx NPU HW Random Number Generator support" 117 depends on HW_RANDOM && ARCH_IXP4XX 118 default HW_RANDOM 119 ---help--- 120 This driver provides kernel-side support for the Random 121 Number Generator hardware found on the Intel IXP4xx NPU. 122 123 To compile this driver as a module, choose M here: the 124 module will be called ixp4xx-rng. 125 126 If unsure, say Y. 127 128config HW_RANDOM_OMAP 129 tristate "OMAP Random Number Generator support" 130 depends on HW_RANDOM && (ARCH_OMAP16XX || ARCH_OMAP2) 131 default HW_RANDOM 132 ---help--- 133 This driver provides kernel-side support for the Random Number 134 Generator hardware found on OMAP16xx and OMAP24xx multimedia 135 processors. 136 137 To compile this driver as a module, choose M here: the 138 module will be called omap-rng. 139 140 If unsure, say Y. 141 142config HW_RANDOM_OCTEON 143 tristate "Octeon Random Number Generator support" 144 depends on HW_RANDOM && CPU_CAVIUM_OCTEON 145 default HW_RANDOM 146 ---help--- 147 This driver provides kernel-side support for the Random Number 148 Generator hardware found on Octeon processors. 149 150 To compile this driver as a module, choose M here: the 151 module will be called octeon-rng. 152 153 If unsure, say Y. 154 155config HW_RANDOM_PASEMI 156 tristate "PA Semi HW Random Number Generator support" 157 depends on HW_RANDOM && PPC_PASEMI 158 default HW_RANDOM 159 ---help--- 160 This driver provides kernel-side support for the Random Number 161 Generator hardware found on PA Semi PWRficient SoCs. 162 163 To compile this driver as a module, choose M here: the 164 module will be called pasemi-rng. 165 166 If unsure, say Y. 167 168config HW_RANDOM_VIRTIO 169 tristate "VirtIO Random Number Generator support" 170 depends on HW_RANDOM && VIRTIO 171 ---help--- 172 This driver provides kernel-side support for the virtual Random Number 173 Generator hardware. 174 175 To compile this driver as a module, choose M here: the 176 module will be called virtio-rng. If unsure, say N. 177 178config HW_RANDOM_TX4939 179 tristate "TX4939 Random Number Generator support" 180 depends on HW_RANDOM && SOC_TX4939 181 default HW_RANDOM 182 ---help--- 183 This driver provides kernel-side support for the Random Number 184 Generator hardware found on TX4939 SoC. 185 186 To compile this driver as a module, choose M here: the 187 module will be called tx4939-rng. 188 189 If unsure, say Y. 190 191config HW_RANDOM_MXC_RNGA 192 tristate "Freescale i.MX RNGA Random Number Generator" 193 depends on HW_RANDOM && ARCH_HAS_RNGA 194 ---help--- 195 This driver provides kernel-side support for the Random Number 196 Generator hardware found on Freescale i.MX processors. 197 198 To compile this driver as a module, choose M here: the 199 module will be called mxc-rnga. 200 201 If unsure, say Y. 202 203config HW_RANDOM_NOMADIK 204 tristate "ST-Ericsson Nomadik Random Number Generator support" 205 depends on HW_RANDOM && PLAT_NOMADIK 206 ---help--- 207 This driver provides kernel-side support for the Random Number 208 Generator hardware found on ST-Ericsson SoCs (8815 and 8500). 209 210 To compile this driver as a module, choose M here: the 211 module will be called nomadik-rng. 212 213 If unsure, say Y. 214 215config HW_RANDOM_PICOXCELL 216 tristate "Picochip picoXcell true random number generator support" 217 depends on HW_RANDOM && ARCH_PICOXCELL && PICOXCELL_PC3X3 218 ---help--- 219 This driver provides kernel-side support for the Random Number 220 Generator hardware found on Picochip PC3x3 and later devices. 221 222 To compile this driver as a module, choose M here: the 223 module will be called picoxcell-rng. 224 225 If unsure, say Y. 226 227config HW_RANDOM_PPC4XX 228 tristate "PowerPC 4xx generic true random number generator support" 229 depends on HW_RANDOM && PPC && 4xx 230 ---help--- 231 This driver provides the kernel-side support for the TRNG hardware 232 found in the security function of some PowerPC 4xx SoCs. 233 234 To compile this driver as a module, choose M here: the 235 module will be called ppc4xx-rng. 236 237 If unsure, say N. 238 239config UML_RANDOM 240 depends on UML 241 tristate "Hardware random number generator" 242 help 243 This option enables UML's "hardware" random number generator. It 244 attaches itself to the host's /dev/random, supplying as much entropy 245 as the host has, rather than the small amount the UML gets from its 246 own drivers. It registers itself as a standard hardware random number 247 generator, major 10, minor 183, and the canonical device name is 248 /dev/hwrng. 249 The way to make use of this is to install the rng-tools package 250 (check your distro, or download from 251 http://sourceforge.net/projects/gkernel/). rngd periodically reads 252 /dev/hwrng and injects the entropy into /dev/random. 253