Re: [Xen-devel] regarding vtpm setup

[Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>]

On 03/07/2014 07:19 AM, Aastha Mehta wrote:
> Hello,
>
> Thank you for your response.
[...]
> > Have you tested to see if the vTPM shows up in the guest? If so, can you use
> > it?
> I can see /dev/tpm0 in the guest. And I am able to use the vtpm in the
> guest So far, I did only tpm_version, but I see messages showing up on
> the vtpm and the vtpmmgr console.
This indicates that the vTPM is working as it is supposed to.

> > What do the Xenstore entries for the vtpm devices look like (from
> > xenstore-ls)?
> >
> > Do the event channels there match with the event channel dump (xl debug-key
> > e)?
> I see a lot of entries in xl debug-keys dump. I can match all the
> event channels in the xenstore entries with the ones from xl
> debug-keys dump. However, there are some entries in xl debug-keys
> which I cannot find in xenstore. I do not understand what those are..
>
> The ones that match are appended with "<<".
> Note, vtpmmgr = domid 2, vtpm = domid 3, guest = domid 4.
Event channels can be created for other reasons besides those recorded
in xenstore: the xenstore event channel itself and the guest console
are some examples. If you are getting TPM responses, the event channels
are wired up correctly.

--
Daniel De Graaf
National Security Agency

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