* TPM 2.0 CRB driver & locality
@ 2017-09-26 20:22 Jork Loeser
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From: Jork Loeser @ 2017-09-26 20:22 UTC (permalink / raw)
To: linux-integrity
Hello,
We are running Linux under Hyper-V with its emulated vTPM (you might call it synthetic TPM). While the TPM itself adheres to the spec, it does not support localities. Consequently, the I/O block does not include the locality portion, and the control register offset is hence different in the TPM2.0 ACPI table from what the driver expects. This leads to below warning:
root@ubuntu:~# dmesg | grep tpm
[ 7.849077] tpm_crb VTPM0101:00: [Firmware Bug]: Bad ACPI memory layout
I wonder if a warning message of the form "Memory layout does not comply to PC-client-spec. Disabling locality support." might be more descriptive, perhaps with an additional comment in the source code.
What do you think?
Jork
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2017-09-26 20:22 TPM 2.0 CRB driver & locality Jork Loeser
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