Re: [PATCH] hw/i386: Add unaccepted memory configuration

[Gerd Hoffman]

  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.

take care,
  Gerd