Hi,
I am currently running a Debian lenny on top of a Ubuntu 9.04 dom0. (Xen
version is 3.4)
Now I want to test some tpm functions in the domU, but I am having troubles
reaching the TPM. To do so, I am following the tutorial here :
https://www.grounation.org/index.php?post/2008/07/04/8-how-to-use-a-tpm-with-linux
I have already used this tutorial on a non-virtualised machine, and even on
my dom0, and I managed to communicate with the TPM without any problem. So
here is what I do, and what goes wrong :
*- apt-get install tpm-tools trousers
- modprobe tpm_bios
- modprobe tpm*
So far, no problem. Here, if I follow exactly the tutorial and type
*- modprobe tpm_tis force=1 interrupts=0*
I get the following error message :
*FATAL: Error inserting tpm_tis
(/lib/modules/2.6.18.8-xen/kernel/drivers/char/tpm/tpm_tis.ko): Input/output
error*
When I look at dmesg, the displayed message is not the one expected :
*pnp: the driver ''tpm_tis'' has been registered*
If I just run
*- modprobe tpm_tis*
I do not get any error message, but when I run dmesg, I get the same
disappointing message (According to the tutorial, the message should be
something like
* **[xxx.yyy] tpm_tis tpm_tis: 1.2 TPM (device-id 0x4A10, rev-id 78)*
which is what I get when I follow the tutorial anywhere but on my domU.
Anyway, after having done this, if I try to communicate with the TPM, I get
the following error message :
*lenny-guest:/home/nicolas# tpm_version*
*Tspi_Context_Connect failed: 0x00003011 - layer=tsp, code=0011 (17),
Communication failure*
which seems to confirm that the modules are not loaded...
Yes, I checked if tcsd was started, first with
*/etc/init.d/trousers status
tcsd is not running*
Then I ran
*/usr/sbin/tcsd start*
which does not return any error message
But /etc/init.d/trousers status keeps saying tcsd is not started.
Indeed, I wanted to disassemble the ACPI table to see if something was
wrong, but it seems that there is no ''acpi'' folder in /proc.
But actually,
as it works on the dom0, there should be no problem, because it proves that
my TPM is supported by tpm_tis...
I think I detailed all I know about it, do you have any idea..?
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