Re: [Xense-devel] vtpm_managerd problem

[Burak OÐUZ <burakoguzs@xxxxxxxxx>]

 > 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?
 > 

 > 2 - How can I activate vtpm on domUs? After modprobing the tpm_xenu 

 > I start trousers on a domU, it gives such an error :  

 

Once you modprobed tpm_xenu, is /dev/tpm0 available? 

Did you start you user domain with a running vtpm_managerd and the 'vtpm = ...' 
line in the vm config file? 

    
    ---------> When I modprobe the tpm_xenu, it creates a tpm0 device. But till 
now I could not start the vtpm_managerd and therefore this may be deceptive.

Thanks Stefan...

--- Burak







 
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