Hi Gerd,

   Hi,

AFAIU 'true' is the behavior you are proposing with your EFI changes?
Saying that what's the difference between 'false' & 'default' wrt EFI
firmware? Just wondering do we need default?

true/false will force the one or the other no matter what.

'default' allows the firmware to choose depending on various factors,
for example have cc-specific build variants have a different default
behavior than the generic builds.

It also keeps the door open to change default behavior in the future.
One reasonable approach would be to start with firmware accepting all
memory by default, wait until support for unaccepted memory has found
its way into linux distro kernels, then flip the default to pass
unaccepted memory to the linux kernel.

In case the uefi boot service spec gets updated to allow negotiating
unaccepted memory support automatically this can be used easily by
making that the firmware's default behavior.

Fair. Also, it would be interesting to see the right future combination
of {un/a}cceptable boot vs runtime aceptable memory and also support in uefi specs.

o.k to keep placeholder for now but I still see, might have to keep the interface extensible, maybe something like bit level negotiations than true/false/default etc. But for now I don't have any strong opinion or ideas and have to catch up from uefi side.

Thank you for explaining.

Best regards,
Pankaj




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