xref: /openbmc/linux/drivers/char/hw_random/Kconfig (revision 8684014d) 
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_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
336config HW_RANDOM_XGENE
337	tristate "APM X-Gene True Random Number Generator (TRNG) support"
338	depends on HW_RANDOM && ARCH_XGENE
339	default HW_RANDOM
340	---help---
341	  This driver provides kernel-side support for the Random Number
342	  Generator hardware found on APM X-Gene SoC.
343
344	  To compile this driver as a module, choose M here: the
345	  module will be called xgene_rng.
346
347	  If unsure, say Y.
348
349endif # HW_RANDOM
350
351config UML_RANDOM
352	depends on UML
353	tristate "Hardware random number generator"
354	help
355	  This option enables UML's "hardware" random number generator.  It
356	  attaches itself to the host's /dev/random, supplying as much entropy
357	  as the host has, rather than the small amount the UML gets from its
358	  own drivers.  It registers itself as a standard hardware random number
359	  generator, major 10, minor 183, and the canonical device name is
360	  /dev/hwrng.
361	  The way to make use of this is to install the rng-tools package
362	  (check your distro, or download from
363	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads
364	  /dev/hwrng and injects the entropy into /dev/random.
365