[tboot-devel] Dynamic Root of Trust

[Atanas F. <ata...@go...>]

Hi all,

I'm currently doing some experiments with dynamic root of trust. From
the tboot boot log I can see that the SENTER instruction is executed and
the PCRs 17 and above are set to 0 and that PCRs 17 and 18 are extended.
My question, if somebody could help me, is how to set PCR 17 or any
other PCR to 0 from the running system and if I understand correctly the
PCR value should change if I boot another XEN domain and should change
back to the original value if I shut it down? Or am I mistaken?
I'd appriciate any help.

Best,
  Atanas