Re: [Qemu-devel] [Qemu-arm] [PATCH v2] target-arm: Implement BCM2835 hardware RNG

[Peter Maydell <peter.maydell@linaro.org>]

On 11 February 2017 at 11:34, Alex Bennée <alex.bennee@linaro.org> wrote:

> I know we are running under emulation but is rand() the right call to
> feed data to the guest? There is the virtio rng and PPC spar RNG which
> both use rng_backend_request_entropy() to collect random data. We should
> probably make the Pi RNG as good as the other guests.

See discussion on v1 of this patch -- the rng backend is probably
the right idea but its API is a huge pain in the neck. I suggested
Marcin do a v2 which still uses rand() so we can get everything
else reviewed, and then deal with the rng stuff separately.

(Notably I think that for the rng backend you have to on the
command line create and wire up a backend, which is a lot
of pain. There doesn't seem to be any kind of "use a sane
default" available :-( )

thanks
-- PMM