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The Linux kernel configuration item CONFIG_UML_RANDOM
has multiple definitions:
drivers/char/hw_random/Kconfig
The configuration item CONFIG_UML_RANDOM:
CONFIG_UML
random
, random
, random
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 rng-core driver thus providing a device which is usually called /dev/hwrng. This hardware random number generator does feed into the kernel's random number generator entropy pool.
If unsure, say Y.
drivers/char/hw_random/Kconfig
The configuration item CONFIG_UML_RANDOM:
CONFIG_UML
random
, random
, random
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.
arch/um/Kconfig.char
The configuration item CONFIG_UML_RANDOM:
(none)
random
, random
, random
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.
arch/um/Kconfig_char
The configuration item CONFIG_UML_RANDOM:
(none)
random
, random
, random
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.
Raw data from LKDDb:
lkddb module random CONFIG_UML_RANDOM : arch/um/Kconfig.char : "Hardware random number generator" # in 2.6.14–2.6.39, 3.0–3.1
lkddb module random CONFIG_UML_RANDOM : arch/um/Kconfig_char : "Hardware random number generator" # in 2.6.12–2.6.13
lkddb module random CONFIG_UML_RANDOM : drivers/char/hw_random/Kconfig : "UML Random Number Generator support" # in 3.2–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11
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