Re: [Xen-users] Install vTPM on Xen-4.1.2

[Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>]

On 11/14/2013 05:35 AM, Wei Liu wrote:
> On Thu, Nov 14, 2013 at 05:50:24AM +0000, Xu, Quan wrote:
> > Hi, Wei / Community
> >     We are working on support HVM domU based on vTPM stubdom. Now the vTPM 
> > stubdom is just for PV domU in Xen 4.3.0.
This is not correct; the frontend driver in Linux 3.12 will also work on
HVM, same as the other PV drivers.

An important caveat here is that you don't have a complete measurement
of an HVM domain (hvmloader and grub don't speak to the TPM), but that
wasn't true in earlier versions of Xen for either PV or HVM, so using
the older version won't improve that.

> > Xen supports HVM domU in previous version 4.1.2, even though the backend is in 
> > Dom0.
> > In previous vTPM, the backend driver is in Linux 2.6.18, the kernel is tough to 
> > build. I think it is helpful, if we enable the previous vTPM.
> >     Does anyone maintain the vTPM backend driver?
> >
> > Quan Xu
I'm not sure building the 2.6.18 backend driver would be any more helpful
to you, since it won't talk to the frontend in 3.12. The PV stubdoms have
no issues talking to an HVM frontend (at least from what I've tested).

> I'm not expert in this field. You can probably make use of the classic
> 2.6.18 kernel tree on xenbits.xen.org.
>
> Wei.
--
Daniel De Graaf
National Security Agency

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