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Linux/drivers/char/hw_random/Kconfig

  1 #
  2 # Hardware Random Number Generator (RNG) configuration
  3 #
  4 
  5 menuconfig 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 
 23 if HW_RANDOM
 24 
 25 config 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 
 39 config 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 
 52 config 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 
 65 config HW_RANDOM_ATMEL
 66         tristate "Atmel Random Number Generator support"
 67         depends on ARCH_AT91 && HAVE_CLK
 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 
 78 config 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 
 91 config 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 
104 config 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 
117 config 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 
130 config 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 
143 config 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 
156 config 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 
170 config 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 
183 config 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 
196 config 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 
209 config 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 
219 config 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 
232 config 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 
245 config 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 
258 config 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 
271 config 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 
284 config 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 
297 config 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 
310 config 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 
323 config 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 
336 endif # HW_RANDOM
337 
338 config UML_RANDOM
339         depends on UML
340         tristate "Hardware random number generator"
341         help
342           This option enables UML's "hardware" random number generator.  It
343           attaches itself to the host's /dev/random, supplying as much entropy
344           as the host has, rather than the small amount the UML gets from its
345           own drivers.  It registers itself as a standard hardware random number
346           generator, major 10, minor 183, and the canonical device name is
347           /dev/hwrng.
348           The way to make use of this is to install the rng-tools package
349           (check your distro, or download from
350           http://sourceforge.net/projects/gkernel/).  rngd periodically reads
351           /dev/hwrng and injects the entropy into /dev/random.

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