xref: /openbmc/linux/drivers/char/hw_random/Kconfig (revision 827634ad) 
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 && OF
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_IPROC_RNG200
105	tristate "Broadcom iProc RNG200 support"
106	depends on ARCH_BCM_IPROC
107	default HW_RANDOM
108	---help---
109	  This driver provides kernel-side support for the RNG200
110	  hardware found on the Broadcom iProc SoCs.
111
112	  To compile this driver as a module, choose M here: the
113	  module will be called iproc-rng200
114
115	  If unsure, say Y.
116
117config HW_RANDOM_GEODE
118	tristate "AMD Geode HW Random Number Generator support"
119	depends on X86_32 && PCI
120	default HW_RANDOM
121	---help---
122	  This driver provides kernel-side support for the Random Number
123	  Generator hardware found on the AMD Geode LX.
124
125	  To compile this driver as a module, choose M here: the
126	  module will be called geode-rng.
127
128	  If unsure, say Y.
129
130config HW_RANDOM_N2RNG
131	tristate "Niagara2 Random Number Generator support"
132	depends on SPARC64
133	default HW_RANDOM
134	---help---
135	  This driver provides kernel-side support for the Random Number
136	  Generator hardware found on Niagara2 cpus.
137
138	  To compile this driver as a module, choose M here: the
139	  module will be called n2-rng.
140
141	  If unsure, say Y.
142
143config HW_RANDOM_VIA
144	tristate "VIA HW Random Number Generator support"
145	depends on X86
146	default HW_RANDOM
147	---help---
148	  This driver provides kernel-side support for the Random Number
149	  Generator hardware found on VIA based motherboards.
150
151	  To compile this driver as a module, choose M here: the
152	  module will be called via-rng.
153
154	  If unsure, say Y.
155
156config HW_RANDOM_IXP4XX
157	tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support"
158	depends on ARCH_IXP4XX
159	default HW_RANDOM
160	---help---
161	  This driver provides kernel-side support for the Pseudo-Random
162	  Number Generator hardware found on the Intel IXP45x/46x NPU.
163
164	  To compile this driver as a module, choose M here: the
165	  module will be called ixp4xx-rng.
166
167	  If unsure, say Y.
168
169config HW_RANDOM_OMAP
170	tristate "OMAP Random Number Generator support"
171	depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS
172	default HW_RANDOM
173 	---help---
174 	  This driver provides kernel-side support for the Random Number
175	  Generator hardware found on OMAP16xx, OMAP2/3/4/5 and AM33xx/AM43xx
176	  multimedia processors.
177
178	  To compile this driver as a module, choose M here: the
179	  module will be called omap-rng.
180
181 	  If unsure, say Y.
182
183config HW_RANDOM_OMAP3_ROM
184	tristate "OMAP3 ROM Random Number Generator support"
185	depends on ARCH_OMAP3
186	default HW_RANDOM
187	---help---
188	  This driver provides kernel-side support for the Random Number
189	  Generator hardware found on OMAP34xx processors.
190
191	  To compile this driver as a module, choose M here: the
192	  module will be called omap3-rom-rng.
193
194	  If unsure, say Y.
195
196config HW_RANDOM_OCTEON
197	tristate "Octeon Random Number Generator support"
198	depends on CAVIUM_OCTEON_SOC
199	default HW_RANDOM
200	---help---
201	  This driver provides kernel-side support for the Random Number
202	  Generator hardware found on Octeon processors.
203
204	  To compile this driver as a module, choose M here: the
205	  module will be called octeon-rng.
206
207	  If unsure, say Y.
208
209config HW_RANDOM_PASEMI
210	tristate "PA Semi HW Random Number Generator support"
211	depends on PPC_PASEMI
212	default HW_RANDOM
213	---help---
214	  This driver provides kernel-side support for the Random Number
215	  Generator hardware found on PA Semi PWRficient SoCs.
216
217	  To compile this driver as a module, choose M here: the
218	  module will be called pasemi-rng.
219
220	  If unsure, say Y.
221
222config HW_RANDOM_VIRTIO
223	tristate "VirtIO Random Number Generator support"
224	depends on VIRTIO
225	---help---
226	  This driver provides kernel-side support for the virtual Random Number
227	  Generator hardware.
228
229	  To compile this driver as a module, choose M here: the
230	  module will be called virtio-rng.  If unsure, say N.
231
232config HW_RANDOM_TX4939
233	tristate "TX4939 Random Number Generator support"
234	depends on SOC_TX4939
235	default HW_RANDOM
236	---help---
237	  This driver provides kernel-side support for the Random Number
238	  Generator hardware found on TX4939 SoC.
239
240	  To compile this driver as a module, choose M here: the
241	  module will be called tx4939-rng.
242
243	  If unsure, say Y.
244
245config HW_RANDOM_MXC_RNGA
246	tristate "Freescale i.MX RNGA Random Number Generator"
247	depends on ARCH_HAS_RNGA
248	default HW_RANDOM
249	---help---
250	  This driver provides kernel-side support for the Random Number
251	  Generator hardware found on Freescale i.MX processors.
252
253	  To compile this driver as a module, choose M here: the
254	  module will be called mxc-rnga.
255
256	  If unsure, say Y.
257
258config HW_RANDOM_NOMADIK
259	tristate "ST-Ericsson Nomadik Random Number Generator support"
260	depends on ARCH_NOMADIK
261	default HW_RANDOM
262	---help---
263	  This driver provides kernel-side support for the Random Number
264	  Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
265
266	  To compile this driver as a module, choose M here: the
267	  module will be called nomadik-rng.
268
269	  If unsure, say Y.
270
271config HW_RANDOM_PPC4XX
272	tristate "PowerPC 4xx generic true random number generator support"
273	depends on PPC && 4xx
274	default HW_RANDOM
275	---help---
276	 This driver provides the kernel-side support for the TRNG hardware
277	 found in the security function of some PowerPC 4xx SoCs.
278
279	 To compile this driver as a module, choose M here: the
280	 module will be called ppc4xx-rng.
281
282	 If unsure, say N.
283
284config HW_RANDOM_PSERIES
285	tristate "pSeries HW Random Number Generator support"
286	depends on PPC64 && IBMVIO
287	default HW_RANDOM
288	---help---
289	  This driver provides kernel-side support for the Random Number
290	  Generator hardware found on POWER7+ machines and above
291
292	  To compile this driver as a module, choose M here: the
293	  module will be called pseries-rng.
294
295	  If unsure, say Y.
296
297config HW_RANDOM_POWERNV
298	tristate "PowerNV Random Number Generator support"
299	depends on PPC_POWERNV
300	default HW_RANDOM
301	---help---
302	  This is the driver for Random Number Generator hardware found
303	  in POWER7+ and above machines for PowerNV platform.
304
305	  To compile this driver as a module, choose M here: the
306	  module will be called powernv-rng.
307
308	  If unsure, say Y.
309
310config HW_RANDOM_EXYNOS
311	tristate "EXYNOS HW random number generator support"
312	depends on ARCH_EXYNOS
313	default HW_RANDOM
314	---help---
315	  This driver provides kernel-side support for the Random Number
316	  Generator hardware found on EXYNOS SOCs.
317
318	  To compile this driver as a module, choose M here: the
319	  module will be called exynos-rng.
320
321	  If unsure, say Y.
322
323config HW_RANDOM_TPM
324	tristate "TPM HW Random Number Generator support"
325	depends on TCG_TPM
326	default HW_RANDOM
327	---help---
328	  This driver provides kernel-side support for the Random Number
329	  Generator in the Trusted Platform Module
330
331	  To compile this driver as a module, choose M here: the
332	  module will be called tpm-rng.
333
334	  If unsure, say Y.
335
336config HW_RANDOM_MSM
337	tristate "Qualcomm SoCs Random Number Generator support"
338	depends on HW_RANDOM && ARCH_QCOM
339	default HW_RANDOM
340	---help---
341	  This driver provides kernel-side support for the Random Number
342	  Generator hardware found on Qualcomm SoCs.
343
344	  To compile this driver as a module, choose M here. the
345	  module will be called msm-rng.
346
347	  If unsure, say Y.
348
349config HW_RANDOM_XGENE
350	tristate "APM X-Gene True Random Number Generator (TRNG) support"
351	depends on HW_RANDOM && ARCH_XGENE
352	default HW_RANDOM
353	---help---
354	  This driver provides kernel-side support for the Random Number
355	  Generator hardware found on APM X-Gene SoC.
356
357	  To compile this driver as a module, choose M here: the
358	  module will be called xgene_rng.
359
360	  If unsure, say Y.
361
362endif # HW_RANDOM
363
364config UML_RANDOM
365	depends on UML
366	tristate "Hardware random number generator"
367	help
368	  This option enables UML's "hardware" random number generator.  It
369	  attaches itself to the host's /dev/random, supplying as much entropy
370	  as the host has, rather than the small amount the UML gets from its
371	  own drivers.  It registers itself as a standard hardware random number
372	  generator, major 10, minor 183, and the canonical device name is
373	  /dev/hwrng.
374	  The way to make use of this is to install the rng-tools package
375	  (check your distro, or download from
376	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads
377	  /dev/hwrng and injects the entropy into /dev/random.
378