David Woodhouse [off-list ref] wrote:

David, is there a way to do that test purely in software without
needing hardware support? We know that the data might not actually be
present in all cases... is there an easy test for that case?

I have written a user TPM driver that talks to a userspace TPM implementation
out of the backend.  It's been pushed to the TPM driver guy but I'm not sure
what became of it.  I'll chase it up.

David