On 08/20/2012 06:12 PM, Jordi Cucurull Juan wrote:
Dear all,
I am testing the TPM patches of Stefan Berger to provide TPM support
to QEMU. Nevertheless I have not managed to run them successfully.
During the compilation of QEMU with his patches (V18 for revision
563987d) I have not had any issue. But, I have a virtual machine based
on CentOS 6.2 and the TPM does not seem to be present. I run the
machine with the following command line (as a root user):
# /usr/local/bin/qemu-system-x86_64 -hda qemu-disk-centos.img -m 1024
-boot d -enable-kvm -usbdevice tablet -k es -tpmdev
passthrough,id=tpm0,path=/dev/tpm0 -device tpm-tis,tpmdev=tpm0
My real machine has an Infineon TPM v1.2. When I try to load the TSS
library (Trousers) inside the client machine (the CentOS 6.2) it
throws the following error:
insmod: error inserting
'/lib/modules/2.6.32-279.5.1.el6.x86_64/kernel/drivers/char/tpm/tpm_atmel.ko':
-1 no such device
You have to use tpm_tis.
Unless you are using the SeaBIOS extensions for TPM support as well you
have do
modprobe tpm_tis force=1
or in the grub command line
tpm_tis.force=1
The 'force' parameter is necessary if ACPI tables for TPM are missing
and those are only provided once SeaBIOS has been patched with TPM support.
Stefan
Apart from this, QEMU does not throw any error. Should I enable
something else to have access to the TPM? In addition, I do not see
any /dev/vtpm0 device in my real machine.
Best regards,
Jordi.
