Re: [Xense-devel] tpm_vtpm: tpm_transmit: tpm_send: error 4294967294

[Stefan Berger <stefanb@xxxxxxxxxx>]

xense-devel-bounces@xxxxxxxxxxxxxxxxxxx wrote on 06/30/2006
05:40:05 AM:

> Hello,
> 
> I downloaded xen-testing yesterday evening, and there is a strange
problem:
> 
> I start the vtpm_managerd, and when I load the tpm_xen module inside
my
> DomU, I can see that the vTPM gets initialized:
> 
> Initializing tpm: clear
> ...
> TPMD[1]: tpm/tpm_startup.c:44: Info: TPM_Startup(1)
> 
> The vtpm_managerd also reacts on unloading the modules:
> INFO[VTPM]: [1]: RECV[14}: 0x0 0 0 0 1 c1 0 0 0 e 0 0 0 2 0 0 0 1
> INFO[VTPM]: Closing DMI 1.
> INFO[TCS]: Calling TCS_CloseContext.
> INFO[VTPM]: Killing dmi on pid 9446.
> INFO[VTPM]: [1]: SENT: 0x0 0 0 0 1 c1 0 0 0 a 0 0 0 0
> 
> So I would assume that the communication channel between the DomU
and
> vtpm_managerd is fine.
> 
> But when I try to access the vTPM (directly or using /sys), I get
an
> error message:
> 
> tpm:~# cat /sys/devices/platform/tpm_vtpm/pcrs
>  tpm_vtpm: tpm_transmit: tpm_send: error 4294967294
> 
> This is the same error message I get when the vtpm_managerd is not
> running, also the vtpm_managerd does not display anything at this
moment
> (using strace it looks like it doesn't receive anything).
> 
> The strange part is, that I was able to use the vTPM once, but I am
not
> able to reproduce this...

I you can, please switch over to xen-unstable, though
there you will also currently have to wait until several patches are going
into the repository.

-- Stefan
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