Re: [Xense-devel] vtpm_managerd problem

[Stefan Berger <stefanb@xxxxxxxxxx>]

Burak OÐUZ <burakoguzs@xxxxxxxxx> wrote on 12/05/2006
09:58:41 AM:

> 
> 
> 
>  > Hi,
> 
>  > 
> 
>  > I am a newbie in tpm virtualization on Xen. I have a working
IFX 
> 
>  > Tpm. I have a few questions about the usage of the vtpm_managerd
and
> 
>  > vtpm usage :
> 
>  >  
> 
>  > 1 - vtpm_managerd gives that error 
> 
> > 
> 
>  > dungeon trousers-CVS # vtpm_managerd
> 
>  > INFO[VTPM]: Starting VTPM.
> 
>  > INFO[TCS]: Constructing new TCS:
> 
>  > ERROR[TXDATA]: TPM open failedERROR in VTPM_Init_Manager
at 
> 
>  > vtpm_manager.c:205 code: TPM_IOERROR.
> 
>  > ERROR[VTPM]: Closing vtpmd due to error during startup.
> 
>  
> 
> Did you compile the TPM backend driver? If you compile it as a 
> module do 'modprobe tpmbk' before you start the vtpm_managerd. Also
> you have to have the driver for your hardware TPM in the kernel 
> before you start it. Both /dev/vtpm and /dev/tpm0 have to be there
> 
> 
>             ------ > How can I get
the tpm backend driver? Should I 
> re-compile the dom0 kernel?

In your current kernel configuration file (i.e., linux-2.6.16.33-xen/.config)
you should set

CONFIG_XEN_TPMDEV_BACKEND=m

and then recompile using 'make install' for example
in xen-unstable.hg. Afterwards a 'modprobe tpmbk' should work.

   Stefan
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