[Qemu-devel] TPM does not seem to work under QEMU with TPM patches

[Jordi Cucurull Juan]

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

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.


--
Jordi Cucurull Juan
Researcher
Scytl Secure Electronic Voting
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