xref: /openbmc/linux/drivers/char/hw_random/Kconfig (revision 7f877908) 
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 ARCH_MXC
248	default HW_RANDOM
249	---help---
250	  This driver provides kernel-side support for the Random Number
251	  Generator Version C hardware found on some Freescale i.MX
252	  processors. Version B is also supported by this driver.
253
254	  To compile this driver as a module, choose M here: the
255	  module will be called imx-rngc.
256
257	  If unsure, say Y.
258
259config HW_RANDOM_NOMADIK
260	tristate "ST-Ericsson Nomadik Random Number Generator support"
261	depends on ARCH_NOMADIK
262	default HW_RANDOM
263	---help---
264	  This driver provides kernel-side support for the Random Number
265	  Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
266
267	  To compile this driver as a module, choose M here: the
268	  module will be called nomadik-rng.
269
270	  If unsure, say Y.
271
272config HW_RANDOM_PSERIES
273	tristate "pSeries HW Random Number Generator support"
274	depends on PPC64 && IBMVIO
275	default HW_RANDOM
276	---help---
277	  This driver provides kernel-side support for the Random Number
278	  Generator hardware found on POWER7+ machines and above
279
280	  To compile this driver as a module, choose M here: the
281	  module will be called pseries-rng.
282
283	  If unsure, say Y.
284
285config HW_RANDOM_POWERNV
286	tristate "PowerNV Random Number Generator support"
287	depends on PPC_POWERNV
288	default HW_RANDOM
289	---help---
290	  This is the driver for Random Number Generator hardware found
291	  in POWER7+ and above machines for PowerNV platform.
292
293	  To compile this driver as a module, choose M here: the
294	  module will be called powernv-rng.
295
296	  If unsure, say Y.
297
298config HW_RANDOM_HISI
299	tristate "Hisilicon Random Number Generator support"
300	depends on HW_RANDOM && ARCH_HISI
301	default HW_RANDOM
302	---help---
303	  This driver provides kernel-side support for the Random Number
304	  Generator hardware found on Hisilicon Hip04 and Hip05 SoC.
305
306	  To compile this driver as a module, choose M here: the
307	  module will be called hisi-rng.
308
309	  If unsure, say Y.
310
311config HW_RANDOM_HISI_V2
312	tristate "HiSilicon True Random Number Generator V2 support"
313	depends on HW_RANDOM && ARM64 && ACPI
314	default HW_RANDOM
315	help
316	  This driver provides kernel-side support for the True Random Number
317	  Generator V2 hardware found on HiSilicon Hi1620 SoC.
318
319	  To compile this driver as a module, choose M here: the
320	  module will be called hisi-trng-v2.
321
322	  If unsure, say Y.
323
324config HW_RANDOM_ST
325	tristate "ST Microelectronics HW Random Number Generator support"
326	depends on HW_RANDOM && ARCH_STI
327	---help---
328	  This driver provides kernel-side support for the Random Number
329	  Generator hardware found on STi series of SoCs.
330
331	  To compile this driver as a module, choose M here: the
332	  module will be called st-rng.
333
334config HW_RANDOM_XGENE
335	tristate "APM X-Gene True Random Number Generator (TRNG) support"
336	depends on HW_RANDOM && ARCH_XGENE
337	default HW_RANDOM
338	---help---
339	  This driver provides kernel-side support for the Random Number
340	  Generator hardware found on APM X-Gene SoC.
341
342	  To compile this driver as a module, choose M here: the
343	  module will be called xgene_rng.
344
345	  If unsure, say Y.
346
347config HW_RANDOM_STM32
348	tristate "STMicroelectronics STM32 random number generator"
349	depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST)
350	depends on HAS_IOMEM
351	default HW_RANDOM
352	help
353	  This driver provides kernel-side support for the Random Number
354	  Generator hardware found on STM32 microcontrollers.
355
356	  To compile this driver as a module, choose M here: the
357	  module will be called stm32-rng.
358
359	  If unsure, say N.
360
361config HW_RANDOM_PIC32
362	tristate "Microchip PIC32 Random Number Generator support"
363	depends on HW_RANDOM && MACH_PIC32
364	default y
365	---help---
366	  This driver provides kernel-side support for the Random Number
367	  Generator hardware found on a PIC32.
368
369	  To compile this driver as a module, choose M here. the
370	  module will be called pic32-rng.
371
372	  If unsure, say Y.
373
374config HW_RANDOM_MESON
375	tristate "Amlogic Meson Random Number Generator support"
376	depends on HW_RANDOM
377	depends on ARCH_MESON || COMPILE_TEST
378	default y
379	---help---
380	  This driver provides kernel-side support for the Random Number
381	  Generator hardware found on Amlogic Meson SoCs.
382
383	  To compile this driver as a module, choose M here. the
384	  module will be called meson-rng.
385
386	  If unsure, say Y.
387
388config HW_RANDOM_CAVIUM
389	tristate "Cavium ThunderX Random Number Generator support"
390	depends on HW_RANDOM && PCI && (ARM64 || (COMPILE_TEST && 64BIT))
391	default HW_RANDOM
392	---help---
393	  This driver provides kernel-side support for the Random Number
394	  Generator hardware found on Cavium SoCs.
395
396	  To compile this driver as a module, choose M here: the
397	  module will be called cavium_rng.
398
399	  If unsure, say Y.
400
401config HW_RANDOM_MTK
402	tristate "Mediatek Random Number Generator support"
403	depends on HW_RANDOM
404	depends on ARCH_MEDIATEK || COMPILE_TEST
405	default y
406	---help---
407	  This driver provides kernel-side support for the Random Number
408	  Generator hardware found on Mediatek SoCs.
409
410	  To compile this driver as a module, choose M here. the
411	  module will be called mtk-rng.
412
413	  If unsure, say Y.
414
415config HW_RANDOM_S390
416	tristate "S390 True Random Number Generator support"
417	depends on S390
418	default HW_RANDOM
419	---help---
420	  This driver provides kernel-side support for the True
421	  Random Number Generator available as CPACF extension
422	  on modern s390 hardware platforms.
423
424	  To compile this driver as a module, choose M here: the
425	  module will be called s390-trng.
426
427	  If unsure, say Y.
428
429config HW_RANDOM_EXYNOS
430	tristate "Samsung Exynos True Random Number Generator support"
431	depends on ARCH_EXYNOS || COMPILE_TEST
432	default HW_RANDOM
433	---help---
434	  This driver provides support for the True Random Number
435	  Generator available in Exynos SoCs.
436
437	  To compile this driver as a module, choose M here: the module
438	  will be called exynos-trng.
439
440	  If unsure, say Y.
441
442config HW_RANDOM_OPTEE
443	tristate "OP-TEE based Random Number Generator support"
444	depends on OPTEE
445	default HW_RANDOM
446	help
447	  This  driver provides support for OP-TEE based Random Number
448	  Generator on ARM SoCs where hardware entropy sources are not
449	  accessible to normal world (Linux).
450
451	  To compile this driver as a module, choose M here: the module
452	  will be called optee-rng.
453
454	  If unsure, say Y.
455
456config HW_RANDOM_NPCM
457	tristate "NPCM Random Number Generator support"
458	depends on ARCH_NPCM || COMPILE_TEST
459	default HW_RANDOM
460	help
461 	  This driver provides support for the Random Number
462	  Generator hardware available in Nuvoton NPCM SoCs.
463
464	  To compile this driver as a module, choose M here: the
465	  module will be called npcm-rng.
466
467 	  If unsure, say Y.
468
469endif # HW_RANDOM
470
471config UML_RANDOM
472	depends on UML
473	tristate "Hardware random number generator"
474	help
475	  This option enables UML's "hardware" random number generator.  It
476	  attaches itself to the host's /dev/random, supplying as much entropy
477	  as the host has, rather than the small amount the UML gets from its
478	  own drivers.  It registers itself as a standard hardware random number
479	  generator, major 10, minor 183, and the canonical device name is
480	  /dev/hwrng.
481	  The way to make use of this is to install the rng-tools package
482	  (check your distro, or download from
483	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads
484	  /dev/hwrng and injects the entropy into /dev/random.
485
486config HW_RANDOM_KEYSTONE
487	depends on ARCH_KEYSTONE || COMPILE_TEST
488	default HW_RANDOM
489	tristate "TI Keystone NETCP SA Hardware random number generator"
490	help
491	  This option enables Keystone's hardware random generator.
492