commit c23426b9d7cb4e5a405bace9410487b2c8ae4f70
author Jiyong Park <jiyong@google.com> Mon Apr 10 17:32:27 2023 +0900
committer Jiyong Park <jiyong@google.com> Tue Apr 11 00:51:54 2023 +0900
tree 41d6e2d333092525c6526f2fe9b43822486db27d
parent 1511c643d723a9b966bf4e5afb6ba7df9394de87

pvmfw: debug policy application failure is recoverable

If pvmfw fails to apply the debug policy, the original fdt is recovered
from the backup.

In this change also moves apply_debug_policy into modify_for_next_stage,
so that modification to the fdt after the verification is done in one
place.

Finally, error codes that are specific to debug policy are replaced with
the original errors from libfdt because the former don't give much
detail information than the other.

Bug: 275132866
Bug: 275306568
Test: forcibly modify a bit in debug_policy inside pvmfw and see if the
VM boots (without applying it). Flashing an invalid debug_policy was not
an option for the test because then ABL would reject it and doesn't pass
it to pvmfw at all.

Change-Id: I1c40967087449deb89a9698a87109fc16e588b70