2 # Hardware Random Number Generator (RNG) configuration
6 tristate "Hardware Random Number Generator Core support"
9 Hardware Random Number Generator Core infrastructure.
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.
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
23 config HW_RANDOM_TIMERIOMEM
24 tristate "Timer IOMEM HW Random Number Generator support"
25 depends on HW_RANDOM && HAS_IOMEM
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.
32 To compile this driver as a module, choose M here: the
33 module will be called timeriomem-rng.
37 config HW_RANDOM_INTEL
38 tristate "Intel HW Random Number Generator support"
39 depends on HW_RANDOM && (X86 || IA64) && PCI
42 This driver provides kernel-side support for the Random Number
43 Generator hardware found on Intel i8xx-based motherboards.
45 To compile this driver as a module, choose M here: the
46 module will be called intel-rng.
51 tristate "AMD HW Random Number Generator support"
52 depends on HW_RANDOM && (X86 || PPC_MAPLE) && PCI
55 This driver provides kernel-side support for the Random Number
56 Generator hardware found on AMD 76x-based motherboards.
58 To compile this driver as a module, choose M here: the
59 module will be called amd-rng.
63 config HW_RANDOM_ATMEL
64 tristate "Atmel Random Number Generator support"
65 depends on HW_RANDOM && ARCH_AT91SAM9G45
68 This driver provides kernel-side support for the Random Number
69 Generator hardware found on Atmel AT91 devices.
71 To compile this driver as a module, choose M here: the
72 module will be called atmel-rng.
76 config HW_RANDOM_GEODE
77 tristate "AMD Geode HW Random Number Generator support"
78 depends on HW_RANDOM && X86_32 && PCI
81 This driver provides kernel-side support for the Random Number
82 Generator hardware found on the AMD Geode LX.
84 To compile this driver as a module, choose M here: the
85 module will be called geode-rng.
89 config HW_RANDOM_N2RNG
90 tristate "Niagara2 Random Number Generator support"
91 depends on HW_RANDOM && SPARC64
94 This driver provides kernel-side support for the Random Number
95 Generator hardware found on Niagara2 cpus.
97 To compile this driver as a module, choose M here: the
98 module will be called n2-rng.
103 tristate "VIA HW Random Number Generator support"
104 depends on HW_RANDOM && X86
107 This driver provides kernel-side support for the Random Number
108 Generator hardware found on VIA based motherboards.
110 To compile this driver as a module, choose M here: the
111 module will be called via-rng.
115 config HW_RANDOM_IXP4XX
116 tristate "Intel IXP4xx NPU HW Random Number Generator support"
117 depends on HW_RANDOM && ARCH_IXP4XX
120 This driver provides kernel-side support for the Random
121 Number Generator hardware found on the Intel IXP4xx NPU.
123 To compile this driver as a module, choose M here: the
124 module will be called ixp4xx-rng.
128 config HW_RANDOM_OMAP
129 tristate "OMAP Random Number Generator support"
130 depends on HW_RANDOM && (ARCH_OMAP16XX || ARCH_OMAP2)
133 This driver provides kernel-side support for the Random Number
134 Generator hardware found on OMAP16xx and OMAP24xx multimedia
137 To compile this driver as a module, choose M here: the
138 module will be called omap-rng.
142 config HW_RANDOM_OCTEON
143 tristate "Octeon Random Number Generator support"
144 depends on HW_RANDOM && CPU_CAVIUM_OCTEON
147 This driver provides kernel-side support for the Random Number
148 Generator hardware found on Octeon processors.
150 To compile this driver as a module, choose M here: the
151 module will be called octeon-rng.
155 config HW_RANDOM_PASEMI
156 tristate "PA Semi HW Random Number Generator support"
157 depends on HW_RANDOM && PPC_PASEMI
160 This driver provides kernel-side support for the Random Number
161 Generator hardware found on PA Semi PWRficient SoCs.
163 To compile this driver as a module, choose M here: the
164 module will be called pasemi-rng.
168 config HW_RANDOM_VIRTIO
169 tristate "VirtIO Random Number Generator support"
170 depends on HW_RANDOM && VIRTIO
172 This driver provides kernel-side support for the virtual Random Number
175 To compile this driver as a module, choose M here: the
176 module will be called virtio-rng. If unsure, say N.
178 config HW_RANDOM_TX4939
179 tristate "TX4939 Random Number Generator support"
180 depends on HW_RANDOM && SOC_TX4939
183 This driver provides kernel-side support for the Random Number
184 Generator hardware found on TX4939 SoC.
186 To compile this driver as a module, choose M here: the
187 module will be called tx4939-rng.
191 config HW_RANDOM_MXC_RNGA
192 tristate "Freescale i.MX RNGA Random Number Generator"
193 depends on HW_RANDOM && ARCH_HAS_RNGA
195 This driver provides kernel-side support for the Random Number
196 Generator hardware found on Freescale i.MX processors.
198 To compile this driver as a module, choose M here: the
199 module will be called mxc-rnga.
203 config HW_RANDOM_NOMADIK
204 tristate "ST-Ericsson Nomadik Random Number Generator support"
205 depends on HW_RANDOM && PLAT_NOMADIK
207 This driver provides kernel-side support for the Random Number
208 Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
210 To compile this driver as a module, choose M here: the
211 module will be called nomadik-rng.
215 config HW_RANDOM_PICOXCELL
216 tristate "Picochip picoXcell true random number generator support"
217 depends on HW_RANDOM && ARCH_PICOXCELL && PICOXCELL_PC3X3
219 This driver provides kernel-side support for the Random Number
220 Generator hardware found on Picochip PC3x3 and later devices.
222 To compile this driver as a module, choose M here: the
223 module will be called picoxcell-rng.
227 config HW_RANDOM_PPC4XX
228 tristate "PowerPC 4xx generic true random number generator support"
229 depends on HW_RANDOM && PPC && 4xx
231 This driver provides the kernel-side support for the TRNG hardware
232 found in the security function of some PowerPC 4xx SoCs.
234 To compile this driver as a module, choose M here: the
235 module will be called ppc4xx-rng.
241 tristate "Hardware random number generator"
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
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.