Hi Arend, On Tue, Feb 14, 2023 at 7:04 PM Hector Martin <marcan@xxxxxxxxx> 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 for all Apple platforms (those with an Apple OTP). Following on from the conversation a year ago, is there a way to detect chipsets that need these random bytes? While I'm sure Apple is doing their own special thing for special Apple reasons, it seems relatively sensible to omit a RNG on lower-cost chipsets, so would other chipsets need it? > Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> > Signed-off-by: Hector Martin <marcan@xxxxxxxxx> Beyond that, it all seems pretty sensible. Reviewed-by: Julian Calaby <julian.calaby@xxxxxxxxx> > --- > .../broadcom/brcm80211/brcmfmac/pcie.c | 32 +++++++++++++++++++ > 1 file changed, 32 insertions(+) Thanks, -- Julian Calaby Email: julian.calaby@xxxxxxxxx Profile: http://www.google.com/profiles/julian.calaby/
