On Sun, Dec 26, 2021 at 4:38 PM Hector Martin [off-list ref] wrote:

Newer Apple firmwares on chipsets without a hardware RNG require the
host to provide a buffer of 256 random bytes to the device on
initialization. This buffer is present immediately before NVRAM,
suffixed by a footer containing a magic number and the buffer length.

This won't affect chips/firmwares that do not use this feature, so do it
unconditionally.

Signed-off-by: Hector Martin <redacted>

Reviewed-by: Linus Walleij <redacted>

Yours,
Linus Walleij