On 7/21/22 14:56, Jason A. Donenfeld wrote:
Tiny machines optimized for fast boot time generally don't use EFI,
which means a random seed has to be supplied some other way. For this
purpose, Linux (≥5.20) supports passing a seed in the setup_data table
with SETUP_RNG_SEED, specially intended for hypervisors, kexec, and
specialized bootloaders. The linked commit shows the upstream kernel
implementation.
At Paolo's request, we don't pass these to versioned machine types ≤7.0.
Link: https://git.kernel.org/tip/tip/c/68b8e9713c8
Cc: Marcel Apfelbaum <marcel.apfelb...@gmail.com>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Richard Henderson <richard.hender...@linaro.org>
Cc: Eduardo Habkost <edua...@habkost.net>
Cc: Peter Maydell <peter.mayd...@linaro.org>
Cc: Philippe Mathieu-Daudé <f4...@amsat.org>
Cc: Laurent Vivier <laur...@vivier.eu>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
LGTM.
Paolo
