xref: /openbmc/linux/drivers/char/hw_random/Kconfig (revision f5ad1c74) 
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_BA431
78	tristate "Silex Insight BA431 Random Number Generator support"
79	depends on HAS_IOMEM
80	help
81	  This driver provides kernel-side support for the Random Number
82	  Generator hardware based on Silex Insight BA431 IP.
83
84	  To compile this driver as a module, choose M here: the
85	  module will be called ba431-rng.
86
87config HW_RANDOM_BCM2835
88	tristate "Broadcom BCM2835/BCM63xx Random Number Generator support"
89	depends on ARCH_BCM2835 || ARCH_BCM_NSP || ARCH_BCM_5301X || \
90		   ARCH_BCM_63XX || BCM63XX || BMIPS_GENERIC
91	default HW_RANDOM
92	help
93	  This driver provides kernel-side support for the Random Number
94	  Generator hardware found on the Broadcom BCM2835 and BCM63xx SoCs.
95
96	  To compile this driver as a module, choose M here: the
97	  module will be called bcm2835-rng
98
99	  If unsure, say Y.
100
101config HW_RANDOM_IPROC_RNG200
102	tristate "Broadcom iProc/STB RNG200 support"
103	depends on ARCH_BCM_IPROC || ARCH_BCM2835 || ARCH_BRCMSTB
104	default HW_RANDOM
105	help
106	  This driver provides kernel-side support for the RNG200
107	  hardware found on the Broadcom iProc and STB SoCs.
108
109	  To compile this driver as a module, choose M here: the
110	  module will be called iproc-rng200
111
112	  If unsure, say Y.
113
114config HW_RANDOM_GEODE
115	tristate "AMD Geode HW Random Number Generator support"
116	depends on X86_32 && PCI
117	default HW_RANDOM
118	help
119	  This driver provides kernel-side support for the Random Number
120	  Generator hardware found on the AMD Geode LX.
121
122	  To compile this driver as a module, choose M here: the
123	  module will be called geode-rng.
124
125	  If unsure, say Y.
126
127config HW_RANDOM_N2RNG
128	tristate "Niagara2 Random Number Generator support"
129	depends on SPARC64
130	default HW_RANDOM
131	help
132	  This driver provides kernel-side support for the Random Number
133	  Generator hardware found on Niagara2 cpus.
134
135	  To compile this driver as a module, choose M here: the
136	  module will be called n2-rng.
137
138	  If unsure, say Y.
139
140config HW_RANDOM_VIA
141	tristate "VIA HW Random Number Generator support"
142	depends on X86
143	default HW_RANDOM
144	help
145	  This driver provides kernel-side support for the Random Number
146	  Generator hardware found on VIA based motherboards.
147
148	  To compile this driver as a module, choose M here: the
149	  module will be called via-rng.
150
151	  If unsure, say Y.
152
153config HW_RANDOM_IXP4XX
154	tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support"
155	depends on ARCH_IXP4XX
156	default HW_RANDOM
157	help
158	  This driver provides kernel-side support for the Pseudo-Random
159	  Number Generator hardware found on the Intel IXP45x/46x NPU.
160
161	  To compile this driver as a module, choose M here: the
162	  module will be called ixp4xx-rng.
163
164	  If unsure, say Y.
165
166config HW_RANDOM_OMAP
167	tristate "OMAP Random Number Generator support"
168	depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS || ARCH_MVEBU
169	default HW_RANDOM
170	help
171 	  This driver provides kernel-side support for the Random Number
172	  Generator hardware found on OMAP16xx, OMAP2/3/4/5, AM33xx/AM43xx
173	  multimedia processors, and Marvell Armada 7k/8k SoCs.
174
175	  To compile this driver as a module, choose M here: the
176	  module will be called omap-rng.
177
178 	  If unsure, say Y.
179
180config HW_RANDOM_OMAP3_ROM
181	tristate "OMAP3 ROM Random Number Generator support"
182	depends on ARCH_OMAP3
183	default HW_RANDOM
184	help
185	  This driver provides kernel-side support for the Random Number
186	  Generator hardware found on OMAP34xx processors.
187
188	  To compile this driver as a module, choose M here: the
189	  module will be called omap3-rom-rng.
190
191	  If unsure, say Y.
192
193config HW_RANDOM_OCTEON
194	tristate "Octeon Random Number Generator support"
195	depends on CAVIUM_OCTEON_SOC
196	default HW_RANDOM
197	help
198	  This driver provides kernel-side support for the Random Number
199	  Generator hardware found on Octeon processors.
200
201	  To compile this driver as a module, choose M here: the
202	  module will be called octeon-rng.
203
204	  If unsure, say Y.
205
206config HW_RANDOM_PASEMI
207	tristate "PA Semi HW Random Number Generator support"
208	depends on PPC_PASEMI
209	default HW_RANDOM
210	help
211	  This driver provides kernel-side support for the Random Number
212	  Generator hardware found on PA Semi PWRficient SoCs.
213
214	  To compile this driver as a module, choose M here: the
215	  module will be called pasemi-rng.
216
217	  If unsure, say Y.
218
219config HW_RANDOM_VIRTIO
220	tristate "VirtIO Random Number Generator support"
221	depends on VIRTIO
222	help
223	  This driver provides kernel-side support for the virtual Random Number
224	  Generator hardware.
225
226	  To compile this driver as a module, choose M here: the
227	  module will be called virtio-rng.  If unsure, say N.
228
229config HW_RANDOM_TX4939
230	tristate "TX4939 Random Number Generator support"
231	depends on SOC_TX4939
232	default HW_RANDOM
233	help
234	  This driver provides kernel-side support for the Random Number
235	  Generator hardware found on TX4939 SoC.
236
237	  To compile this driver as a module, choose M here: the
238	  module will be called tx4939-rng.
239
240	  If unsure, say Y.
241
242config HW_RANDOM_MXC_RNGA
243	tristate "Freescale i.MX RNGA Random Number Generator"
244	depends on SOC_IMX31
245	default HW_RANDOM
246	help
247	  This driver provides kernel-side support for the Random Number
248	  Generator hardware found on Freescale i.MX processors.
249
250	  To compile this driver as a module, choose M here: the
251	  module will be called mxc-rnga.
252
253	  If unsure, say Y.
254
255config HW_RANDOM_IMX_RNGC
256	tristate "Freescale i.MX RNGC Random Number Generator"
257	depends on HAS_IOMEM && HAVE_CLK
258	depends on SOC_IMX25 || SOC_IMX6SL || SOC_IMX6SLL || SOC_IMX6UL || COMPILE_TEST
259	default HW_RANDOM
260	help
261	  This driver provides kernel-side support for the Random Number
262	  Generator Version C hardware found on some Freescale i.MX
263	  processors. Version B is also supported by this driver.
264
265	  To compile this driver as a module, choose M here: the
266	  module will be called imx-rngc.
267
268	  If unsure, say Y.
269
270config HW_RANDOM_INGENIC_RNG
271	tristate "Ingenic Random Number Generator support"
272	depends on HW_RANDOM
273	depends on MACH_JZ4780 || MACH_X1000
274	default HW_RANDOM
275	help
276	  This driver provides kernel-side support for the Random Number Generator
277	  hardware found in ingenic JZ4780 and X1000 SoC. MIPS Creator CI20 uses
278	  JZ4780 SoC, YSH & ATIL CU1000-Neo uses X1000 SoC.
279
280	  To compile this driver as a module, choose M here: the
281	  module will be called ingenic-rng.
282
283	  If unsure, say Y.
284
285config HW_RANDOM_INGENIC_TRNG
286	tristate "Ingenic True Random Number Generator support"
287	depends on HW_RANDOM
288	depends on MACH_X1830
289	default HW_RANDOM
290	help
291	  This driver provides kernel-side support for the True Random Number Generator
292	  hardware found in ingenic X1830 SoC. YSH & ATIL CU1830-Neo uses X1830 SoC.
293
294	  To compile this driver as a module, choose M here: the
295	  module will be called ingenic-trng.
296
297	  If unsure, say Y.
298
299config HW_RANDOM_NOMADIK
300	tristate "ST-Ericsson Nomadik Random Number Generator support"
301	depends on ARCH_NOMADIK
302	default HW_RANDOM
303	help
304	  This driver provides kernel-side support for the Random Number
305	  Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
306
307	  To compile this driver as a module, choose M here: the
308	  module will be called nomadik-rng.
309
310	  If unsure, say Y.
311
312config HW_RANDOM_PSERIES
313	tristate "pSeries HW Random Number Generator support"
314	depends on PPC64 && IBMVIO
315	default HW_RANDOM
316	help
317	  This driver provides kernel-side support for the Random Number
318	  Generator hardware found on POWER7+ machines and above
319
320	  To compile this driver as a module, choose M here: the
321	  module will be called pseries-rng.
322
323	  If unsure, say Y.
324
325config HW_RANDOM_POWERNV
326	tristate "PowerNV Random Number Generator support"
327	depends on PPC_POWERNV
328	default HW_RANDOM
329	help
330	  This is the driver for Random Number Generator hardware found
331	  in POWER7+ and above machines for PowerNV platform.
332
333	  To compile this driver as a module, choose M here: the
334	  module will be called powernv-rng.
335
336	  If unsure, say Y.
337
338config HW_RANDOM_HISI
339	tristate "Hisilicon Random Number Generator support"
340	depends on HW_RANDOM && ARCH_HISI
341	default HW_RANDOM
342	help
343	  This driver provides kernel-side support for the Random Number
344	  Generator hardware found on Hisilicon Hip04 and Hip05 SoC.
345
346	  To compile this driver as a module, choose M here: the
347	  module will be called hisi-rng.
348
349	  If unsure, say Y.
350
351config HW_RANDOM_ST
352	tristate "ST Microelectronics HW Random Number Generator support"
353	depends on HW_RANDOM && ARCH_STI
354	help
355	  This driver provides kernel-side support for the Random Number
356	  Generator hardware found on STi series of SoCs.
357
358	  To compile this driver as a module, choose M here: the
359	  module will be called st-rng.
360
361config HW_RANDOM_XGENE
362	tristate "APM X-Gene True Random Number Generator (TRNG) support"
363	depends on HW_RANDOM && ARCH_XGENE
364	default HW_RANDOM
365	help
366	  This driver provides kernel-side support for the Random Number
367	  Generator hardware found on APM X-Gene SoC.
368
369	  To compile this driver as a module, choose M here: the
370	  module will be called xgene_rng.
371
372	  If unsure, say Y.
373
374config HW_RANDOM_STM32
375	tristate "STMicroelectronics STM32 random number generator"
376	depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST)
377	depends on HAS_IOMEM
378	default HW_RANDOM
379	help
380	  This driver provides kernel-side support for the Random Number
381	  Generator hardware found on STM32 microcontrollers.
382
383	  To compile this driver as a module, choose M here: the
384	  module will be called stm32-rng.
385
386	  If unsure, say N.
387
388config HW_RANDOM_PIC32
389	tristate "Microchip PIC32 Random Number Generator support"
390	depends on HW_RANDOM && MACH_PIC32
391	default y
392	help
393	  This driver provides kernel-side support for the Random Number
394	  Generator hardware found on a PIC32.
395
396	  To compile this driver as a module, choose M here. the
397	  module will be called pic32-rng.
398
399	  If unsure, say Y.
400
401config HW_RANDOM_MESON
402	tristate "Amlogic Meson Random Number Generator support"
403	depends on HW_RANDOM
404	depends on ARCH_MESON || COMPILE_TEST
405	default y
406	help
407	  This driver provides kernel-side support for the Random Number
408	  Generator hardware found on Amlogic Meson SoCs.
409
410	  To compile this driver as a module, choose M here. the
411	  module will be called meson-rng.
412
413	  If unsure, say Y.
414
415config HW_RANDOM_CAVIUM
416	tristate "Cavium ThunderX Random Number Generator support"
417	depends on HW_RANDOM && PCI && (ARM64 || (COMPILE_TEST && 64BIT))
418	default HW_RANDOM
419	help
420	  This driver provides kernel-side support for the Random Number
421	  Generator hardware found on Cavium SoCs.
422
423	  To compile this driver as a module, choose M here: the
424	  module will be called cavium_rng.
425
426	  If unsure, say Y.
427
428config HW_RANDOM_MTK
429	tristate "Mediatek Random Number Generator support"
430	depends on HW_RANDOM
431	depends on ARCH_MEDIATEK || COMPILE_TEST
432	default y
433	help
434	  This driver provides kernel-side support for the Random Number
435	  Generator hardware found on Mediatek SoCs.
436
437	  To compile this driver as a module, choose M here. the
438	  module will be called mtk-rng.
439
440	  If unsure, say Y.
441
442config HW_RANDOM_S390
443	tristate "S390 True Random Number Generator support"
444	depends on S390
445	default HW_RANDOM
446	help
447	  This driver provides kernel-side support for the True
448	  Random Number Generator available as CPACF extension
449	  on modern s390 hardware platforms.
450
451	  To compile this driver as a module, choose M here: the
452	  module will be called s390-trng.
453
454	  If unsure, say Y.
455
456config HW_RANDOM_EXYNOS
457	tristate "Samsung Exynos True Random Number Generator support"
458	depends on ARCH_EXYNOS || COMPILE_TEST
459	default HW_RANDOM
460	help
461	  This driver provides support for the True Random Number
462	  Generator available in Exynos SoCs.
463
464	  To compile this driver as a module, choose M here: the module
465	  will be called exynos-trng.
466
467	  If unsure, say Y.
468
469config HW_RANDOM_OPTEE
470	tristate "OP-TEE based Random Number Generator support"
471	depends on OPTEE
472	default HW_RANDOM
473	help
474	  This  driver provides support for OP-TEE based Random Number
475	  Generator on ARM SoCs where hardware entropy sources are not
476	  accessible to normal world (Linux).
477
478	  To compile this driver as a module, choose M here: the module
479	  will be called optee-rng.
480
481	  If unsure, say Y.
482
483config HW_RANDOM_NPCM
484	tristate "NPCM Random Number Generator support"
485	depends on ARCH_NPCM || COMPILE_TEST
486	default HW_RANDOM
487	help
488 	  This driver provides support for the Random Number
489	  Generator hardware available in Nuvoton NPCM SoCs.
490
491	  To compile this driver as a module, choose M here: the
492	  module will be called npcm-rng.
493
494 	  If unsure, say Y.
495
496config HW_RANDOM_KEYSTONE
497	depends on ARCH_KEYSTONE || COMPILE_TEST
498	depends on HAS_IOMEM && OF
499	default HW_RANDOM
500	tristate "TI Keystone NETCP SA Hardware random number generator"
501	help
502	  This option enables Keystone's hardware random generator.
503
504config HW_RANDOM_CCTRNG
505	tristate "Arm CryptoCell True Random Number Generator support"
506	depends on HAS_IOMEM && OF
507	help
508	  Say 'Y' to enable the True Random Number Generator driver for the
509	  Arm TrustZone CryptoCell family of processors.
510	  Currently the CryptoCell 713 and 703 are supported.
511	  The driver is supported only in SoC where Trusted Execution
512	  Environment is not used.
513	  Choose 'M' to compile this driver as a module. The module
514	  will be called cctrng.
515	  If unsure, say 'N'.
516
517config HW_RANDOM_XIPHERA
518	tristate "Xiphera FPGA based True Random Number Generator support"
519	depends on HAS_IOMEM
520	help
521	  This driver provides kernel-side support for Xiphera True Random
522	  Number Generator Intellectual Property Core.
523
524	  To compile this driver as a module, choose M here: the
525	  module will be called xiphera-trng.
526
527endif # HW_RANDOM
528
529config UML_RANDOM
530	depends on UML
531	tristate "Hardware random number generator"
532	help
533	  This option enables UML's "hardware" random number generator.  It
534	  attaches itself to the host's /dev/random, supplying as much entropy
535	  as the host has, rather than the small amount the UML gets from its
536	  own drivers.  It registers itself as a standard hardware random number
537	  generator, major 10, minor 183, and the canonical device name is
538	  /dev/hwrng.
539	  The way to make use of this is to install the rng-tools package
540	  (check your distro, or download from
541	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads
542	  /dev/hwrng and injects the entropy into /dev/random.
543