On 06/05/2020 15:52, Ard Biesheuvel wrote:
On 5/6/20 4:38 PM, Grant Likely wrote:
Only if the door is wide open. If there is a /real need/ for a limited
set of changes to the dtb, then those specific cases can be spelled
out as things firmware is allowed to modify in a replacement DTB. Any
scenarios here need to be very specific.
What specific cases do we know about?
None. There is no way the firmware can currently manipulate the DTB
after the EFI stub has taken ownership of it. We load the firmware
provided one, copy it into a new allocation and make our changes there.
This version is the one that is passed to the OS.
Before ExitBootServices()?
g.
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