xref: /openbmc/linux/drivers/char/hw_random/Kconfig (revision c6fddb28) 
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# Hardware Random Number Generator (RNG) configuration
4#
5
6menuconfig HW_RANDOM
7	tristate "Hardware Random Number Generator Core support"
8	default m
9	---help---
10	  Hardware Random Number Generator Core infrastructure.
11
12	  To compile this driver as a module, choose M here: the
13	  module will be called rng-core.  This provides a device
14	  that's usually called /dev/hwrng, and which exposes one
15	  of possibly several hardware random number generators.
16
17	  These hardware random number generators do feed into the
18	  kernel's random number generator entropy pool.
19
20	  If unsure, say Y.
21
22if HW_RANDOM
23
24config HW_RANDOM_TIMERIOMEM
25	tristate "Timer IOMEM HW Random Number Generator support"
26	depends on HAS_IOMEM
27	---help---
28	  This driver provides kernel-side support for a generic Random
29	  Number Generator used by reading a 'dumb' iomem address that
30	  is to be read no faster than, for example, once a second;
31	  the default FPGA bitstream on the TS-7800 has such functionality.
32
33	  To compile this driver as a module, choose M here: the
34	  module will be called timeriomem-rng.
35
36	  If unsure, say Y.
37
38config HW_RANDOM_INTEL
39	tristate "Intel HW Random Number Generator support"
40	depends on (X86 || IA64) && PCI
41	default HW_RANDOM
42	---help---
43	  This driver provides kernel-side support for the Random Number
44	  Generator hardware found on Intel i8xx-based motherboards.
45
46	  To compile this driver as a module, choose M here: the
47	  module will be called intel-rng.
48
49	  If unsure, say Y.
50
51config HW_RANDOM_AMD
52	tristate "AMD HW Random Number Generator support"
53	depends on (X86 || PPC_MAPLE) && PCI
54	default HW_RANDOM
55	---help---
56	  This driver provides kernel-side support for the Random Number
57	  Generator hardware found on AMD 76x-based motherboards.
58
59	  To compile this driver as a module, choose M here: the
60	  module will be called amd-rng.
61
62	  If unsure, say Y.
63
64config HW_RANDOM_ATMEL
65	tristate "Atmel Random Number Generator support"
66	depends on ARCH_AT91 && HAVE_CLK && OF
67	default HW_RANDOM
68	---help---
69	  This driver provides kernel-side support for the Random Number
70	  Generator hardware found on Atmel AT91 devices.
71
72	  To compile this driver as a module, choose M here: the
73	  module will be called atmel-rng.
74
75	  If unsure, say Y.
76
77config HW_RANDOM_BCM2835
78	tristate "Broadcom BCM2835/BCM63xx Random Number Generator support"
79	depends on ARCH_BCM2835 || ARCH_BCM_NSP || ARCH_BCM_5301X || \
80		   ARCH_BCM_63XX || BCM63XX || BMIPS_GENERIC
81	default HW_RANDOM
82	---help---
83	  This driver provides kernel-side support for the Random Number
84	  Generator hardware found on the Broadcom BCM2835 and BCM63xx SoCs.
85
86	  To compile this driver as a module, choose M here: the
87	  module will be called bcm2835-rng
88
89	  If unsure, say Y.
90
91config HW_RANDOM_IPROC_RNG200
92	tristate "Broadcom iProc/STB RNG200 support"
93	depends on ARCH_BCM_IPROC || ARCH_BCM2835 || ARCH_BRCMSTB
94	default HW_RANDOM
95	---help---
96	  This driver provides kernel-side support for the RNG200
97	  hardware found on the Broadcom iProc and STB SoCs.
98
99	  To compile this driver as a module, choose M here: the
100	  module will be called iproc-rng200
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 || ARCH_MVEBU
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, AM33xx/AM43xx
163	  multimedia processors, and Marvell Armada 7k/8k SoCs.
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 SOC_IMX31
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_IMX_RNGC
246	tristate "Freescale i.MX RNGC Random Number Generator"
247	depends on HAS_IOMEM && HAVE_CLK
248	depends on SOC_IMX25 || COMPILE_TEST
249	default HW_RANDOM
250	---help---
251	  This driver provides kernel-side support for the Random Number
252	  Generator Version C hardware found on some Freescale i.MX
253	  processors. Version B is also supported by this driver.
254
255	  To compile this driver as a module, choose M here: the
256	  module will be called imx-rngc.
257
258	  If unsure, say Y.
259
260config HW_RANDOM_NOMADIK
261	tristate "ST-Ericsson Nomadik Random Number Generator support"
262	depends on ARCH_NOMADIK
263	default HW_RANDOM
264	---help---
265	  This driver provides kernel-side support for the Random Number
266	  Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
267
268	  To compile this driver as a module, choose M here: the
269	  module will be called nomadik-rng.
270
271	  If unsure, say Y.
272
273config HW_RANDOM_PSERIES
274	tristate "pSeries HW Random Number Generator support"
275	depends on PPC64 && IBMVIO
276	default HW_RANDOM
277	---help---
278	  This driver provides kernel-side support for the Random Number
279	  Generator hardware found on POWER7+ machines and above
280
281	  To compile this driver as a module, choose M here: the
282	  module will be called pseries-rng.
283
284	  If unsure, say Y.
285
286config HW_RANDOM_POWERNV
287	tristate "PowerNV Random Number Generator support"
288	depends on PPC_POWERNV
289	default HW_RANDOM
290	---help---
291	  This is the driver for Random Number Generator hardware found
292	  in POWER7+ and above machines for PowerNV platform.
293
294	  To compile this driver as a module, choose M here: the
295	  module will be called powernv-rng.
296
297	  If unsure, say Y.
298
299config HW_RANDOM_HISI
300	tristate "Hisilicon Random Number Generator support"
301	depends on HW_RANDOM && ARCH_HISI
302	default HW_RANDOM
303	---help---
304	  This driver provides kernel-side support for the Random Number
305	  Generator hardware found on Hisilicon Hip04 and Hip05 SoC.
306
307	  To compile this driver as a module, choose M here: the
308	  module will be called hisi-rng.
309
310	  If unsure, say Y.
311
312config HW_RANDOM_HISI_V2
313	tristate "HiSilicon True Random Number Generator V2 support"
314	depends on HW_RANDOM && ARM64 && ACPI
315	default HW_RANDOM
316	help
317	  This driver provides kernel-side support for the True Random Number
318	  Generator V2 hardware found on HiSilicon Hi1620 SoC.
319
320	  To compile this driver as a module, choose M here: the
321	  module will be called hisi-trng-v2.
322
323	  If unsure, say Y.
324
325config HW_RANDOM_ST
326	tristate "ST Microelectronics HW Random Number Generator support"
327	depends on HW_RANDOM && ARCH_STI
328	---help---
329	  This driver provides kernel-side support for the Random Number
330	  Generator hardware found on STi series of SoCs.
331
332	  To compile this driver as a module, choose M here: the
333	  module will be called st-rng.
334
335config HW_RANDOM_XGENE
336	tristate "APM X-Gene True Random Number Generator (TRNG) support"
337	depends on HW_RANDOM && ARCH_XGENE
338	default HW_RANDOM
339	---help---
340	  This driver provides kernel-side support for the Random Number
341	  Generator hardware found on APM X-Gene SoC.
342
343	  To compile this driver as a module, choose M here: the
344	  module will be called xgene_rng.
345
346	  If unsure, say Y.
347
348config HW_RANDOM_STM32
349	tristate "STMicroelectronics STM32 random number generator"
350	depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST)
351	depends on HAS_IOMEM
352	default HW_RANDOM
353	help
354	  This driver provides kernel-side support for the Random Number
355	  Generator hardware found on STM32 microcontrollers.
356
357	  To compile this driver as a module, choose M here: the
358	  module will be called stm32-rng.
359
360	  If unsure, say N.
361
362config HW_RANDOM_PIC32
363	tristate "Microchip PIC32 Random Number Generator support"
364	depends on HW_RANDOM && MACH_PIC32
365	default y
366	---help---
367	  This driver provides kernel-side support for the Random Number
368	  Generator hardware found on a PIC32.
369
370	  To compile this driver as a module, choose M here. the
371	  module will be called pic32-rng.
372
373	  If unsure, say Y.
374
375config HW_RANDOM_MESON
376	tristate "Amlogic Meson Random Number Generator support"
377	depends on HW_RANDOM
378	depends on ARCH_MESON || COMPILE_TEST
379	default y
380	---help---
381	  This driver provides kernel-side support for the Random Number
382	  Generator hardware found on Amlogic Meson SoCs.
383
384	  To compile this driver as a module, choose M here. the
385	  module will be called meson-rng.
386
387	  If unsure, say Y.
388
389config HW_RANDOM_CAVIUM
390	tristate "Cavium ThunderX Random Number Generator support"
391	depends on HW_RANDOM && PCI && (ARM64 || (COMPILE_TEST && 64BIT))
392	default HW_RANDOM
393	---help---
394	  This driver provides kernel-side support for the Random Number
395	  Generator hardware found on Cavium SoCs.
396
397	  To compile this driver as a module, choose M here: the
398	  module will be called cavium_rng.
399
400	  If unsure, say Y.
401
402config HW_RANDOM_MTK
403	tristate "Mediatek Random Number Generator support"
404	depends on HW_RANDOM
405	depends on ARCH_MEDIATEK || COMPILE_TEST
406	default y
407	---help---
408	  This driver provides kernel-side support for the Random Number
409	  Generator hardware found on Mediatek SoCs.
410
411	  To compile this driver as a module, choose M here. the
412	  module will be called mtk-rng.
413
414	  If unsure, say Y.
415
416config HW_RANDOM_S390
417	tristate "S390 True Random Number Generator support"
418	depends on S390
419	default HW_RANDOM
420	---help---
421	  This driver provides kernel-side support for the True
422	  Random Number Generator available as CPACF extension
423	  on modern s390 hardware platforms.
424
425	  To compile this driver as a module, choose M here: the
426	  module will be called s390-trng.
427
428	  If unsure, say Y.
429
430config HW_RANDOM_EXYNOS
431	tristate "Samsung Exynos True Random Number Generator support"
432	depends on ARCH_EXYNOS || COMPILE_TEST
433	default HW_RANDOM
434	---help---
435	  This driver provides support for the True Random Number
436	  Generator available in Exynos SoCs.
437
438	  To compile this driver as a module, choose M here: the module
439	  will be called exynos-trng.
440
441	  If unsure, say Y.
442
443config HW_RANDOM_OPTEE
444	tristate "OP-TEE based Random Number Generator support"
445	depends on OPTEE
446	default HW_RANDOM
447	help
448	  This  driver provides support for OP-TEE based Random Number
449	  Generator on ARM SoCs where hardware entropy sources are not
450	  accessible to normal world (Linux).
451
452	  To compile this driver as a module, choose M here: the module
453	  will be called optee-rng.
454
455	  If unsure, say Y.
456
457config HW_RANDOM_NPCM
458	tristate "NPCM Random Number Generator support"
459	depends on ARCH_NPCM || COMPILE_TEST
460	default HW_RANDOM
461	help
462 	  This driver provides support for the Random Number
463	  Generator hardware available in Nuvoton NPCM SoCs.
464
465	  To compile this driver as a module, choose M here: the
466	  module will be called npcm-rng.
467
468 	  If unsure, say Y.
469
470config HW_RANDOM_KEYSTONE
471	depends on ARCH_KEYSTONE || COMPILE_TEST
472	default HW_RANDOM
473	tristate "TI Keystone NETCP SA Hardware random number generator"
474	help
475	  This option enables Keystone's hardware random generator.
476
477endif # HW_RANDOM
478
479config UML_RANDOM
480	depends on UML
481	tristate "Hardware random number generator"
482	help
483	  This option enables UML's "hardware" random number generator.  It
484	  attaches itself to the host's /dev/random, supplying as much entropy
485	  as the host has, rather than the small amount the UML gets from its
486	  own drivers.  It registers itself as a standard hardware random number
487	  generator, major 10, minor 183, and the canonical device name is
488	  /dev/hwrng.
489	  The way to make use of this is to install the rng-tools package
490	  (check your distro, or download from
491	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads
492	  /dev/hwrng and injects the entropy into /dev/random.
493