Re: [Qemu-devel] [PATCH v3 8/8] tpm: Added support for TPM emulator

[Stefan Berger]

On 05/04/2017 05:44 AM, Patrick Ohly wrote:
> On Wed, 2017-05-03 at 10:42 -0400, Stefan Berger wrote:
> >    - the TPM 2 part , as stated before, is still somewhat in flux. I am
> > not sure when there will be a final TPM 2 from TCG. There the
> > possibility exists that the state blobs the TPM 2 is writing out still
> > change. I have added a version tag in front of the blobs so in case
> > something else gets added that that can be accommodated. Besides that
> > it's also adapted to write the state blobs in big endian format for the
> > same reason as above. Maybe at some point I'll just freeze the code and
> > don't follow the ongoing TPM 2 development anymore besides bug fixes to
> > exsting code, which then freezes the state blobs as well.
> Ignoring the "work in progress" status of TPM 2 and your
> https://github.com/stefanberger/swtpm/tree/tpm2-preview branch, should
> your current code already also work with the qemu device backend that is
> getting discussed here?

Yes.

> In other words, are protocol changes needed? I know that TPM 2 has
> changed the commands, but I don't know whether that affects also the
> lower layers.
No, should work as-is.