Root/drivers/char/hw_random/Kconfig

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

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