> 1. I've got a TPM that implements vendor-specific command codes. Those
> cannot be send to the TPM anymore, but are rejected with EINVAL.
>
>> 2. When upgrading the firmware on my TPM, it switches to a
>> non-standard communication mode for the upgrade process and does not
>> communicate using TPM2.0 commands during this time. Rejecting
>> non-TPM2.0 commands means upgrading won't be possible anymore.

>How non standard? Is the basic header even there? Are the lengths and status 
>code right?

>This might be an argument to add a 'raw' ioctl or something specifically for 
>this special case.

It follows the regular TPM command syntax and looks something like 1.2 commands.

Peter



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