On Thu, Aug 22, 2019 at 03:15:22PM +0800, Hsin-Yi Wang wrote: > Introducing a chosen node, rng-seed, which is an entropy that can be > passed to kernel called very early to increase initial device > randomness. Bootloader should provide this entropy and the value is > read from /chosen/rng-seed in DT. > > Obtain of_fdt_crc32 for CRC check after early_init_dt_scan_nodes(), > since early_init_dt_scan_chosen() would modify fdt to erase rng-seed. > > Add a new interface add_bootloader_randomness() for rng-seed use case. > Depends on whether the seed is trustworthy, rng seed would be passed to > add_hwgenerator_randomness(). Otherwise it would be passed to > add_device_randomness(). Decision is controlled by kernel config > RANDOM_TRUST_BOOTLOADER. > > Signed-off-by: Hsin-Yi Wang <hsi...@chromium.org> > Reviewed-by: Stephen Boyd <swb...@chromium.org> > Reviewed-by: Rob Herring <r...@kernel.org>
For the changes to drivers/char/random.c: Reviewed-by: Theodore Ts'o <ty...@mit.edu>
