Change in coreboot[master]: security/vboot/secdata_tpm: Set up space for widevine counter info

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Andrey Pronin, Raul Rangel, Mohan Viswanathan, Name of user not set #1004133, Jon Murphy, Paul Menzel, Julius Werner, Rob Barnes, Yu-Ping Wu.
Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/61521 )

Change subject: security/vboot/secdata_tpm: Set up space for widevine counter info
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Patch Set 4:

(1 comment)

Patchset:

PS3:
> The additional non-volatile space is required to store the status of the counters in use. […]

Julius,

Based on offline conversation I had, as part of protected playback session widevine application creates a counter. Widevine application deletes the counter at the end of the session. These timer creation and deletion operations are tracked as counter status. I am not sure if there is a counter reset operation. I did not see any such command in TCG_TPM2_r1p59_Part3_Commands_code_pub.

Mohan/Nimesh,

Can you also please share the layout of the space?