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. <a href="https://www.kernel.org/doc/Documentation/hw_random.txt
has">Documentation/hw_random.txt
has</a> more information.

If unsure, say Y.

source code:

drivers/char/hw_random/