[deliverable/linux.git] / drivers / char / hw_random / Kconfig

#
# Hardware Random Number Generator (RNG) configuration
#

config HW_RANDOM
	tristate "Hardware Random Number Generator Core support"
	default m
	---help---
	  Hardware Random Number Generator Core infrastructure.

	  To compile this driver as a module, choose M here: the
	  module will be called rng-core.  This provides a device
	  that's usually called /dev/hw_random, and which exposes one
	  of possibly several hardware random number generators.

	  These hardware random number generators do not feed directly
	  into the kernel's random number generator.  That is usually
	  handled by the "rngd" daemon.  Documentation/hw_random.txt
	  has more information.

	  If unsure, say Y.

config HW_RANDOM_TIMERIOMEM
	tristate "Timer IOMEM HW Random Number Generator support"
	depends on HW_RANDOM && HAS_IOMEM
	---help---
	  This driver provides kernel-side support for a generic Random
	  Number Generator used by reading a 'dumb' iomem address that
	  is to be read no faster than, for example, once a second;
	  the default FPGA bitstream on the TS-7800 has such functionality.

	  To compile this driver as a module, choose M here: the
	  module will be called timeriomem-rng.

	  If unsure, say Y.

config HW_RANDOM_INTEL
	tristate "Intel HW Random Number Generator support"
	depends on HW_RANDOM && (X86 || IA64) && PCI
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on Intel i8xx-based motherboards.

	  To compile this driver as a module, choose M here: the
	  module will be called intel-rng.

	  If unsure, say Y.

config HW_RANDOM_AMD
	tristate "AMD HW Random Number Generator support"
	depends on HW_RANDOM && (X86 || PPC_MAPLE) && PCI
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on AMD 76x-based motherboards.

	  To compile this driver as a module, choose M here: the
	  module will be called amd-rng.

	  If unsure, say Y.

config HW_RANDOM_ATMEL
	tristate "Atmel Random Number Generator support"
	depends on HW_RANDOM && HAVE_CLK
	default (HW_RANDOM && ARCH_AT91)
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on Atmel AT91 devices.

	  To compile this driver as a module, choose M here: the
	  module will be called atmel-rng.

	  If unsure, say Y.

config HW_RANDOM_GEODE
	tristate "AMD Geode HW Random Number Generator support"
	depends on HW_RANDOM && X86_32 && PCI
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on the AMD Geode LX.

	  To compile this driver as a module, choose M here: the
	  module will be called geode-rng.

	  If unsure, say Y.

config HW_RANDOM_N2RNG
	tristate "Niagara2 Random Number Generator support"
	depends on HW_RANDOM && SPARC64
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on Niagara2 cpus.

	  To compile this driver as a module, choose M here: the
	  module will be called n2-rng.

	  If unsure, say Y.

config HW_RANDOM_VIA
	tristate "VIA HW Random Number Generator support"
	depends on HW_RANDOM && X86
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on VIA based motherboards.

	  To compile this driver as a module, choose M here: the
	  module will be called via-rng.

	  If unsure, say Y.

config HW_RANDOM_IXP4XX
	tristate "Intel IXP4xx NPU HW Random Number Generator support"
	depends on HW_RANDOM && ARCH_IXP4XX
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random
	  Number Generator hardware found on the Intel IXP4xx NPU.

	  To compile this driver as a module, choose M here: the
	  module will be called ixp4xx-rng.

	  If unsure, say Y.

config HW_RANDOM_OMAP
	tristate "OMAP Random Number Generator support"
	depends on HW_RANDOM && (ARCH_OMAP16XX || ARCH_OMAP2)
	default HW_RANDOM
 	---help---
 	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on OMAP16xx and OMAP24xx multimedia
	  processors.

	  To compile this driver as a module, choose M here: the
	  module will be called omap-rng.

 	  If unsure, say Y.

config HW_RANDOM_OCTEON
	tristate "Octeon Random Number Generator support"
	depends on HW_RANDOM && CPU_CAVIUM_OCTEON
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on Octeon processors.

	  To compile this driver as a module, choose M here: the
	  module will be called octeon-rng.

	  If unsure, say Y.

config HW_RANDOM_PASEMI
	tristate "PA Semi HW Random Number Generator support"
	depends on HW_RANDOM && PPC_PASEMI
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on PA Semi PWRficient SoCs.

	  To compile this driver as a module, choose M here: the
	  module will be called pasemi-rng.

	  If unsure, say Y.

config HW_RANDOM_VIRTIO
	tristate "VirtIO Random Number Generator support"
	depends on HW_RANDOM && VIRTIO
	---help---
	  This driver provides kernel-side support for the virtual Random Number
	  Generator hardware.

	  To compile this driver as a module, choose M here: the
	  module will be called virtio-rng.  If unsure, say N.

config HW_RANDOM_TX4939
	tristate "TX4939 Random Number Generator support"
	depends on HW_RANDOM && SOC_TX4939
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on TX4939 SoC.

	  To compile this driver as a module, choose M here: the
	  module will be called tx4939-rng.

	  If unsure, say Y.

config HW_RANDOM_MXC_RNGA
	tristate "Freescale i.MX RNGA Random Number Generator"
	depends on HW_RANDOM && ARCH_HAS_RNGA
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on Freescale i.MX processors.

	  To compile this driver as a module, choose M here: the
	  module will be called mxc-rnga.

	  If unsure, say Y.

config HW_RANDOM_NOMADIK
	tristate "ST-Ericsson Nomadik Random Number Generator support"
	depends on HW_RANDOM && PLAT_NOMADIK
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on ST-Ericsson SoCs (8815 and 8500).

	  To compile this driver as a module, choose M here: the
	  module will be called nomadik-rng.

	  If unsure, say Y.

config HW_RANDOM_PICOXCELL
	tristate "Picochip picoXcell true random number generator support"
	depends on HW_RANDOM && ARCH_PICOXCELL && PICOXCELL_PC3X3
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on Picochip PC3x3 and later devices.

	  To compile this driver as a module, choose M here: the
	  module will be called picoxcell-rng.

	  If unsure, say Y.

config HW_RANDOM_PPC4XX
	tristate "PowerPC 4xx generic true random number generator support"
	depends on HW_RANDOM && PPC && 4xx
	---help---
	 This driver provides the kernel-side support for the TRNG hardware
	 found in the security function of some PowerPC 4xx SoCs.

	 To compile this driver as a module, choose M here: the
	 module will be called ppc4xx-rng.

	 If unsure, say N.

config UML_RANDOM
	depends on UML
	tristate "Hardware random number generator"
	help
	  This option enables UML's "hardware" random number generator.  It
	  attaches itself to the host's /dev/random, supplying as much entropy
	  as the host has, rather than the small amount the UML gets from its
	  own drivers.  It registers itself as a standard hardware random number
	  generator, major 10, minor 183, and the canonical device name is
	  /dev/hwrng.
	  The way to make use of this is to install the rng-tools package
	  (check your distro, or download from
	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads
	  /dev/hwrng and injects the entropy into /dev/random.

config HW_RANDOM_PSERIES
	tristate "pSeries HW Random Number Generator support"
	depends on HW_RANDOM && PPC64 && IBMVIO
	default HW_RANDOM
	---help---
	  This driver provides kernel-side support for the Random Number
	  Generator hardware found on POWER7+ machines and above

	  To compile this driver as a module, choose M here: the
	  module will be called pseries-rng.

	  If unsure, say Y.
Commit	Line	Data
844dd05f MB	1	#
	2	# Hardware Random Number Generator (RNG) configuration
	3	#
	4
	5	config HW_RANDOM
fed806f4 JB	6	tristate "Hardware Random Number Generator Core support"
fed806f4 JB	7	default m
844dd05f MB	8	---help---
	9	Hardware Random Number Generator Core infrastructure.
	10
fed806f4	11	To compile this driver as a module, choose M here: the
537878d2 DB	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.
fed806f4	20
844dd05f	21	If unsure, say Y.
ca644bd5	22
9c3c133b AC	23	config HW_RANDOM_TIMERIOMEM
9c3c133b AC	24	tristate "Timer IOMEM HW Random Number Generator support"
e88cd6ff	25	depends on HW_RANDOM && HAS_IOMEM
9c3c133b AC	26	---help---
	27	This driver provides kernel-side support for a generic Random
	28	Number Generator used by reading a 'dumb' iomem address that
	29	is to be read no faster than, for example, once a second;
	30	the default FPGA bitstream on the TS-7800 has such functionality.
	31
	32	To compile this driver as a module, choose M here: the
	33	module will be called timeriomem-rng.
	34
	35	If unsure, say Y.
	36
ca644bd5 MB	37	config HW_RANDOM_INTEL
	38	tristate "Intel HW Random Number Generator support"
	39	depends on HW_RANDOM && (X86 \|\| IA64) && PCI
fed806f4	40	default HW_RANDOM
ca644bd5 MB	41	---help---
	42	This driver provides kernel-side support for the Random Number
	43	Generator hardware found on Intel i8xx-based motherboards.
	44
	45	To compile this driver as a module, choose M here: the
	46	module will be called intel-rng.
	47
	48	If unsure, say Y.
96d63c02 MB	49
	50	config HW_RANDOM_AMD
	51	tristate "AMD HW Random Number Generator support"
3023b5b6	52	depends on HW_RANDOM && (X86 \|\| PPC_MAPLE) && PCI
fed806f4	53	default HW_RANDOM
96d63c02 MB	54	---help---
	55	This driver provides kernel-side support for the Random Number
	56	Generator hardware found on AMD 76x-based motherboards.
	57
	58	To compile this driver as a module, choose M here: the
	59	module will be called amd-rng.
	60
	61	If unsure, say Y.
ef5d8627	62
677d3e2f PK	63	config HW_RANDOM_ATMEL
677d3e2f PK	64	tristate "Atmel Random Number Generator support"
1234f4ba	65	depends on HW_RANDOM && HAVE_CLK
028fdd87	66	default (HW_RANDOM && ARCH_AT91)
677d3e2f PK	67	---help---
	68	This driver provides kernel-side support for the Random Number
	69	Generator hardware found on Atmel AT91 devices.
	70
	71	To compile this driver as a module, choose M here: the
	72	module will be called atmel-rng.
	73
	74	If unsure, say Y.
	75
ef5d8627 MB	76	config HW_RANDOM_GEODE
ef5d8627 MB	77	tristate "AMD Geode HW Random Number Generator support"
e199ece4	78	depends on HW_RANDOM && X86_32 && PCI
fed806f4	79	default HW_RANDOM
ef5d8627 MB	80	---help---
	81	This driver provides kernel-side support for the Random Number
	82	Generator hardware found on the AMD Geode LX.
	83
	84	To compile this driver as a module, choose M here: the
	85	module will be called geode-rng.
	86
	87	If unsure, say Y.
13523363	88
ce087150 DM	89	config HW_RANDOM_N2RNG
	90	tristate "Niagara2 Random Number Generator support"
	91	depends on HW_RANDOM && SPARC64
	92	default HW_RANDOM
	93	---help---
	94	This driver provides kernel-side support for the Random Number
	95	Generator hardware found on Niagara2 cpus.
	96
	97	To compile this driver as a module, choose M here: the
	98	module will be called n2-rng.
	99
	100	If unsure, say Y.
	101
13523363 MB	102	config HW_RANDOM_VIA
13523363 MB	103	tristate "VIA HW Random Number Generator support"
e9736c16	104	depends on HW_RANDOM && X86
fed806f4	105	default HW_RANDOM
13523363 MB	106	---help---
	107	This driver provides kernel-side support for the Random Number
	108	Generator hardware found on VIA based motherboards.
	109
	110	To compile this driver as a module, choose M here: the
	111	module will be called via-rng.
	112
	113	If unsure, say Y.
d7174bcb MB	114
	115	config HW_RANDOM_IXP4XX
	116	tristate "Intel IXP4xx NPU HW Random Number Generator support"
	117	depends on HW_RANDOM && ARCH_IXP4XX
fed806f4	118	default HW_RANDOM
d7174bcb MB	119	---help---
	120	This driver provides kernel-side support for the Random
	121	Number Generator hardware found on the Intel IXP4xx NPU.
	122
	123	To compile this driver as a module, choose M here: the
	124	module will be called ixp4xx-rng.
	125
	126	If unsure, say Y.
ebc915ad MB	127
	128	config HW_RANDOM_OMAP
	129	tristate "OMAP Random Number Generator support"
088ef950	130	depends on HW_RANDOM && (ARCH_OMAP16XX \|\| ARCH_OMAP2)
fed806f4	131	default HW_RANDOM
ebc915ad MB	132	---help---
	133	This driver provides kernel-side support for the Random Number
	134	Generator hardware found on OMAP16xx and OMAP24xx multimedia
	135	processors.
	136
	137	To compile this driver as a module, choose M here: the
	138	module will be called omap-rng.
	139
	140	If unsure, say Y.
b8cb3448	141
f7557dc8 DD	142	config HW_RANDOM_OCTEON
	143	tristate "Octeon Random Number Generator support"
	144	depends on HW_RANDOM && CPU_CAVIUM_OCTEON
	145	default HW_RANDOM
	146	---help---
	147	This driver provides kernel-side support for the Random Number
	148	Generator hardware found on Octeon processors.
	149
	150	To compile this driver as a module, choose M here: the
	151	module will be called octeon-rng.
	152
	153	If unsure, say Y.
	154
b8cb3448 OJ	155	config HW_RANDOM_PASEMI
	156	tristate "PA Semi HW Random Number Generator support"
	157	depends on HW_RANDOM && PPC_PASEMI
	158	default HW_RANDOM
	159	---help---
	160	This driver provides kernel-side support for the Random Number
0d08a847	161	Generator hardware found on PA Semi PWRficient SoCs.
b8cb3448 OJ	162
	163	To compile this driver as a module, choose M here: the
	164	module will be called pasemi-rng.
	165
	166	If unsure, say Y.
	167
f7f510ec RR	168	config HW_RANDOM_VIRTIO
	169	tristate "VirtIO Random Number Generator support"
	170	depends on HW_RANDOM && VIRTIO
	171	---help---
	172	This driver provides kernel-side support for the virtual Random Number
	173	Generator hardware.
	174
	175	To compile this driver as a module, choose M here: the
	176	module will be called virtio-rng. If unsure, say N.
45001e92	177
049a947c AN	178	config HW_RANDOM_TX4939
	179	tristate "TX4939 Random Number Generator support"
	180	depends on HW_RANDOM && SOC_TX4939
	181	default HW_RANDOM
	182	---help---
	183	This driver provides kernel-side support for the Random Number
	184	Generator hardware found on TX4939 SoC.
	185
	186	To compile this driver as a module, choose M here: the
	187	module will be called tx4939-rng.
	188
	189	If unsure, say Y.
	190
45001e92 ACA	191	config HW_RANDOM_MXC_RNGA
	192	tristate "Freescale i.MX RNGA Random Number Generator"
	193	depends on HW_RANDOM && ARCH_HAS_RNGA
	194	---help---
	195	This driver provides kernel-side support for the Random Number
	196	Generator hardware found on Freescale i.MX processors.
	197
	198	To compile this driver as a module, choose M here: the
	199	module will be called mxc-rnga.
	200
	201	If unsure, say Y.
bc85b25e AR	202
	203	config HW_RANDOM_NOMADIK
	204	tristate "ST-Ericsson Nomadik Random Number Generator support"
	205	depends on HW_RANDOM && PLAT_NOMADIK
	206	---help---
	207	This driver provides kernel-side support for the Random Number
	208	Generator hardware found on ST-Ericsson SoCs (8815 and 8500).
	209
	210	To compile this driver as a module, choose M here: the
	211	module will be called nomadik-rng.
	212
	213	If unsure, say Y.
5efb94ee JI	214
	215	config HW_RANDOM_PICOXCELL
	216	tristate "Picochip picoXcell true random number generator support"
	217	depends on HW_RANDOM && ARCH_PICOXCELL && PICOXCELL_PC3X3
	218	---help---
	219	This driver provides kernel-side support for the Random Number
	220	Generator hardware found on Picochip PC3x3 and later devices.
	221
	222	To compile this driver as a module, choose M here: the
	223	module will be called picoxcell-rng.
	224
	225	If unsure, say Y.
52527cf3 JB	226
	227	config HW_RANDOM_PPC4XX
	228	tristate "PowerPC 4xx generic true random number generator support"
	229	depends on HW_RANDOM && PPC && 4xx
	230	---help---
	231	This driver provides the kernel-side support for the TRNG hardware
	232	found in the security function of some PowerPC 4xx SoCs.
	233
	234	To compile this driver as a module, choose M here: the
	235	module will be called ppc4xx-rng.
	236
	237	If unsure, say N.
d805a786 AV	238
	239	config UML_RANDOM
	240	depends on UML
	241	tristate "Hardware random number generator"
	242	help
	243	This option enables UML's "hardware" random number generator. It
	244	attaches itself to the host's /dev/random, supplying as much entropy
	245	as the host has, rather than the small amount the UML gets from its
	246	own drivers. It registers itself as a standard hardware random number
	247	generator, major 10, minor 183, and the canonical device name is
	248	/dev/hwrng.
	249	The way to make use of this is to install the rng-tools package
	250	(check your distro, or download from
	251	http://sourceforge.net/projects/gkernel/). rngd periodically reads
	252	/dev/hwrng and injects the entropy into /dev/random.
649e9ea0 KY	253
	254	config HW_RANDOM_PSERIES
	255	tristate "pSeries HW Random Number Generator support"
	256	depends on HW_RANDOM && PPC64 && IBMVIO
	257	default HW_RANDOM
	258	---help---
	259	This driver provides kernel-side support for the Random Number
	260	Generator hardware found on POWER7+ machines and above
	261
	262	To compile this driver as a module, choose M here: the
	263	module will be called pseries-rng.
	264
	265	If unsure, say Y.