tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_NOMADIK
286 tristate "ST-Ericsson Nomadik Random Number Generator support"
287 depends on ARCH_NOMADIK
288 default HW_RANDOM
289 help
290 This driver provides kernel-side support for the Random Number
291 Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
292
293 To compile this driver as a module, choose M here: the
294 module will be called nomadik-rng.
295
296 If unsure, say Y.
297
298config HW_RANDOM_PSERIES
299 tristate "pSeries HW Random Number Generator support"
300 depends on PPC64 && IBMVIO
301 default HW_RANDOM
302 help
303 This driver provides kernel-side support for the Random Number
304 Generator hardware found on POWER7+ machines and above
305
306 To compile this driver as a module, choose M here: the
307 module will be called pseries-rng.
308
309 If unsure, say Y.
310
311config HW_RANDOM_POWERNV
312 tristate "PowerNV Random Number Generator support"
313 depends on PPC_POWERNV
314 default HW_RANDOM
315 help
316 This is the driver for Random Number Generator hardware found
317 in POWER7+ and above machines for PowerNV platform.
318
319 To compile this driver as a module, choose M here: the
320 module will be called powernv-rng.
321
322 If unsure, say Y.
323
324config HW_RANDOM_HISI
325 tristate "Hisilicon Random Number Generator support"
326 depends on HW_RANDOM && ARCH_HISI
327 default HW_RANDOM
328 help
329 This driver provides kernel-side support for the Random Number
330 Generator hardware found on Hisilicon Hip04 and Hip05 SoC.
331
332 To compile this driver as a module, choose M here: the
333 module will be called hisi-rng.
334
335 If unsure, say Y.
336
337config HW_RANDOM_HISI_V2
338 tristate "HiSilicon True Random Number Generator V2 support"
339 depends on HW_RANDOM && ARM64 && ACPI
340 default HW_RANDOM
341 help
342 This driver provides kernel-side support for the True Random Number
343 Generator V2 hardware found on HiSilicon Hi1620 SoC.
344
345 To compile this driver as a module, choose M here: the
346 module will be called hisi-trng-v2.
347
348 If unsure, say Y.
349
350config HW_RANDOM_ST
351 tristate "ST Microelectronics HW Random Number Generator support"
352 depends on HW_RANDOM && ARCH_STI
353 help
354 This driver provides kernel-side support for the Random Number
355 Generator hardware found on STi series of SoCs.
356
357 To compile this driver as a module, choose M here: the
358 module will be called st-rng.
359
360config HW_RANDOM_XGENE
361 tristate "APM X-Gene True Random Number Generator (TRNG) support"
362 depends on HW_RANDOM && ARCH_XGENE
363 default HW_RANDOM
364 help
365 This driver provides kernel-side support for the Random Number
366 Generator hardware found on APM X-Gene SoC.
367
368 To compile this driver as a module, choose M here: the
369 module will be called xgene_rng.
370
371 If unsure, say Y.
372
373config HW_RANDOM_STM32
374 tristate "STMicroelectronics STM32 random number generator"
375 depends on HW_RANDOM && (ARCH_STM32 || COMPILE_TEST)
376 depends on HAS_IOMEM
377 default HW_RANDOM
378 help
379 This driver provides kernel-side support for the Random Number
380 Generator hardware found on STM32 microcontrollers.
381
382 To compile this driver as a module, choose M here: the
383 module will be called stm32-rng.
384
385 If unsure, say N.
386
387config HW_RANDOM_PIC32
388 tristate "Microchip PIC32 Random Number Generator support"
389 depends on HW_RANDOM && MACH_PIC32
390 default y
391 help
392 This driver provides kernel-side support for the Random Number
393 Generator hardware found on a PIC32.
394
395 To compile this driver as a module, choose M here. the
396 module will be called pic32-rng.
397
398 If unsure, say Y.
399
400config HW_RANDOM_MESON
401 tristate "Amlogic Meson Random Number Generator support"
402 depends on HW_RANDOM
403 depends on ARCH_MESON || COMPILE_TEST
404 default y
405 help
406 This driver provides kernel-side support for the Random Number
407 Generator hardware found on Amlogic Meson SoCs.
408
409 To compile this driver as a module, choose M here. the
410 module will be called meson-rng.
411
412 If unsure, say Y.
413
414config HW_RANDOM_CAVIUM
415 tristate "Cavium ThunderX Random Number Generator support"
416 depends on HW_RANDOM && PCI && (ARM64 || (COMPILE_TEST && 64BIT))
417 default HW_RANDOM
418 help
419 This driver provides kernel-side support for the Random Number
420 Generator hardware found on Cavium SoCs.
421
422 To compile this driver as a module, choose M here: the
423 module will be called cavium_rng.
424
425 If unsure, say Y.
426
427config HW_RANDOM_MTK
428 tristate "Mediatek Random Number Generator support"
429 depends on HW_RANDOM
430 depends on ARCH_MEDIATEK || COMPILE_TEST
431 default y
432 help
433 This driver provides kernel-side support for the Random Number
434 Generator hardware found on Mediatek SoCs.
435
436 To compile this driver as a module, choose M here. the
437 module will be called mtk-rng.
438
439 If unsure, say Y.
440
441config HW_RANDOM_S390
442 tristate "S390 True Random Number Generator support"
443 depends on S390
444 default HW_RANDOM
445 help
446 This driver provides kernel-side support for the True
447 Random Number Generator available as CPACF extension
448 on modern s390 hardware platforms.
449
450 To compile this driver as a module, choose M here: the
451 module will be called s390-trng.
452
453 If unsure, say Y.
454
455config HW_RANDOM_EXYNOS
456 tristate "Samsung Exynos True Random Number Generator support"
457 depends on ARCH_EXYNOS || COMPILE_TEST
458 default HW_RANDOM
459 help
460 This driver provides support for the True Random Number
461 Generator available in Exynos SoCs.
462
463 To compile this driver as a module, choose M here: the module
464 will be called exynos-trng.
465
466 If unsure, say Y.
467
468config HW_RANDOM_OPTEE
469 tristate "OP-TEE based Random Number Generator support"
470 depends on OPTEE
471 default HW_RANDOM
472 help
473 This driver provides support for OP-TEE based Random Number
474 Generator on ARM SoCs where hardware entropy sources are not
475 accessible to normal world (Linux).
476
477 To compile this driver as a module, choose M here: the module
478 will be called optee-rng.
479
480 If unsure, say Y.
481
482config HW_RANDOM_NPCM
483 tristate "NPCM Random Number Generator support"
484 depends on ARCH_NPCM || COMPILE_TEST
485 default HW_RANDOM
486 help
487 This driver provides support for the Random Number
488 Generator hardware available in Nuvoton NPCM SoCs.
489
490 To compile this driver as a module, choose M here: the
491 module will be called npcm-rng.
492
493 If unsure, say Y.
494
495config HW_RANDOM_KEYSTONE
496 depends on ARCH_KEYSTONE || COMPILE_TEST
497 default HW_RANDOM
498 tristate "TI Keystone NETCP SA Hardware random number generator"
499 help
500 This option enables Keystone's hardware random generator.
501
502config HW_RANDOM_CCTRNG
503 tristate "Arm CryptoCell True Random Number Generator support"
504 depends on HAS_IOMEM && OF
505 help
506 Say 'Y' to enable the True Random Number Generator driver for the
507 Arm TrustZone CryptoCell family of processors.
508 Currently the CryptoCell 713 and 703 are supported.
509 The driver is supported only in SoC where Trusted Execution
510 Environment is not used.
511 Choose 'M' to compile this driver as a module. The module
512 will be called cctrng.
513 If unsure, say 'N'.
514
515endif # HW_RANDOM
516
517config UML_RANDOM
518 depends on UML
519 tristate "Hardware random number generator"
520 help
521 This option enables UML's "hardware" random number generator. It
522 attaches itself to the host's /dev/random, supplying as much entropy
523 as the host has, rather than the small amount the UML gets from its
524 own drivers. It registers itself as a standard hardware random number
525 generator, major 10, minor 183, and the canonical device name is
526 /dev/hwrng.
527 The way to make use of this is to install the rng-tools package
528 (check your distro, or download from
529 http://sourceforge.net/projects/gkernel/). rngd periodically reads
530 /dev/hwrng and injects the entropy into /dev/random.