Peter,

 

That is defined behavior in TCG PC Client Platform PM Profile (PTP) Specification

https://www.trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2-0-v43-150126.pdf

 

in Table 5 — PCR Initial and Reset Values

 

PCR0: 0000…..03, the ending “3” indicates locality.

 

From: tpm2 [mailto:tpm2-bounces@lists.01.org] On Behalf Of Scheie, Peter M
Sent: Friday, August 31, 2018 9:29 PM
To: tpm2@lists.01.org
Subject: [tpm2] In emulator, why do PCRs 17-22 default to ff?

 

In the emulator, PCRs 0-16 and 23 default to 00 when the emulator is started.  But PCRs 17-22 default to ff.  Why is that?  Why not have them all be 00 or all be ff?  (Actually, I notice PCR0 is 03 upon startup; why is that?)

 

Peter