efi: implement platform-agnostic arm64 host security checks - #566
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alexclewontin wants to merge 2 commits into
Open
efi: implement platform-agnostic arm64 host security checks#566alexclewontin wants to merge 2 commits into
alexclewontin wants to merge 2 commits into
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This PR adds a framework for host security checks on arm64 platforms. It moves #564 to the stack.
It adds a generic framework to check host security on ARM64. Very few truly cross-platform APIs were found to be applicable to that ecosystem, but we can use the backing driver for the TPM to prove that a given TPM is a fTPM: if it is using the OP-TEE fTPM driver we can be sure that it is an fTPM. This is not conclusive (absence of that driver doesn't prove that a TPM is a dTPM), but it is a common reference implementation for the ARM ecosystem, so worth including.