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c0fb7f1a3b
The fallback certificate is provided when TPM is starting up, but the
proper endorsement certificate seed is not found in the RO space.
Unavailability of the proper endorsement cert would be a major failure
for the device using TPM, and it is not supposed to happen: RO space
is protected. On top of that there is no much point in operating with
the fallback certificate.
Let's drop fallback certificate support from the code, leaving it
possible to conditionally compile in for the remote chance of someone
having to debug TPM related problems on the test board (where H1 does
not have proper cert seed in the RO).
BRANCH=cr50, cr50-mp
BUG=b:65253310
TEST=verified that the code without fallback certificate still boots
fine on the debug board.
Compiling with fallback cert disabled saves 2048 bytes of the
flash space.
Change-Id: Ice8fd4ceef03dd7b3bf170e5cee2908b2a99844a
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1031055
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Nagendra Modadugu <ngm@google.com>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly