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Add CONFIG_TRUSTED_FOUNDATIONS build option and calls to issue
SMCs to the TL secure monitor (used when needing to update state
not writable by non-secure code).
Make security/tf_driver an optional part of the build, which is
part of the TL framework to interact with secure services.
Bug 883391
Change-Id: I9c6c14ff457fb3a0c612d558fe731a17c2480750
Signed-off-by: Chris Johnson <cwj@nvidia.com>
Reviewed-on: http://git-master/r/65616
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>
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