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0888d04b47
The "Arm True Random Number Generator Firmware Interface"[1] provides an SMCCC based interface to a true hardware random number generator. So far we are using that in arch_get_random_seed(), but it might be useful to expose the entropy through the /dev/hwrng device as well. This allows to assess the quality of the implementation, by using "rngtest" from the rng-tools package, for example. Add a simple platform driver implementing the hw_random interface. The corresponding platform device is created by the SMCCC core code, we just match it here by name and provide a module alias. Since the firmware takes care about serialisation, this can happily coexist with the arch_get_random_seed() bits. [1] https://developer.arm.com/documentation/den0098/latest/ Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
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agp | ||
hw_random | ||
ipmi | ||
mwave | ||
pcmcia | ||
tpm | ||
xilinx_hwicap | ||
xillybus | ||
adi.c | ||
apm-emulation.c | ||
applicom.c | ||
applicom.h | ||
bsr.c | ||
ds1620.c | ||
dsp56k.c | ||
dtlk.c | ||
hangcheck-timer.c | ||
hpet.c | ||
Kconfig | ||
lp.c | ||
Makefile | ||
mem.c | ||
misc.c | ||
mspec.c | ||
nsc_gpio.c | ||
nvram.c | ||
nwbutton.c | ||
nwbutton.h | ||
nwflash.c | ||
pc8736x_gpio.c | ||
powernv-op-panel.c | ||
ppdev.c | ||
ps3flash.c | ||
random.c | ||
scx200_gpio.c | ||
sonypi.c | ||
tb0219.c | ||
tlclk.c | ||
toshiba.c | ||
ttyprintk.c | ||
uv_mmtimer.c | ||
virtio_console.c |