/dev/tmprm0 resource manager not created for tpm_crb KLM

/dev/tmprm0 resource manager not created for tpm_crb KLM

[Nasim, Kam]

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Hello,

For TPM 2.0, we would like to use the in-kernel RM, in order to have multiple apps connecting concurrently to my TPM device.

Since I am on CentOS 7.3, which is still on Kernel v3.10 (with 4.00 backports), I had to build the TPM Kernel driver out of tree and load it in a 3.10 Kernel.

However I am not seeing any /dev/tpmrm0 character device being created after the tpm_crb KLM gets loaded.

Is there any additional configuration required to make this device node that I may not have backported to v3.10? I only picked from the <kernel>/drivers/char/tpm subtree.

Also how do I access the TPM2 event logs? Would the tpmrm0 device node only be created on boot?  (I see that if I delete the /dev/tpm0 device and reload the kernel module, the device does NOT get created)


Any help you folks can offer me would be greatly appreciated.

Cheers,
Kam

Kam Nasim, Software Engineer - Titanium Cloud, Wind River
direct 613.963.9926  mobile 613.408.3688  skype kamnasim



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