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

[Martin Hermanowski <lists@xxxxxxxxxxxxxxxxxxxxxxx>]

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...

Thanks,
Martin

-- 
Martin Hermanowski
http://martin.hermanowski.name


_______________________________________________
Xense-devel mailing list
Xense-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xense-devel