The commit I was referring to is: 
https://github.com/tianocore/edk2/commit/f15cb995bb3880b77e15afe6facd3da05e599a17

Regards,

Ricardo Araujo - 
www.lsd.ufcg.edu.br/~ricardo 

----- Mensagem original -----
De: "Ricardo Araújo" <rica...@lsd.ufcg.edu.br>
Para: edk2-devel@lists.01.org
Enviadas: Quarta-feira, 1 de agosto de 2018 14:33:45
Assunto: [edk2] Missing boot related measurements at TPM 2.0 PCRs 0-7 with OVMF

Hi everyone, 

I'm using OVMF with a simulated TPM 2.0 (from 
https://github.com/stefanberger/swtpm) and I noticed lately that PCRs 0-7 are 
zeroed after booting the vm (ubuntu 18.04) and the only message related to this 
in dmesg is: 

[ 2.286690] tpm_tis 00:06: 2.0 TPM (device-id 0x1, rev-id 1) 
[ 2.303753] tpm tpm0: A TPM error (256) occurred continue selftest 
[ 2.314199] tpm tpm0: starting up the TPM manually 

I found this started to happen after this commit , previous commits to that are 
showing boot time measurements on PCR 0-7 normally and the error message is 
gone. Has anyone experienced the same behavior? I followed the instructions 
here for building OVMF but I added the parameters -D TPM2_ENABLE=TRUE -D 
SECURE_BOOT_ENABLE=TRUE -D HTTP_BOOT_ENABLE=TRUE. Is there anything else I need 
to add to enable these measurements? 

Regards, 

Ricardo Araujo 
www.lsd.ufcg.edu.br/~ricardo 

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