From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Subject: Re: [PATCH v2 0/3] TPM2.0: Added eventlog support for
 TPM2.0
Date: Tue, 16 Aug 2016 00:26:12 +0300
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On Fri, Aug 12, 2016 at 06:02:00PM +0530, Nayna wrote:
> >>Jarkko, Please let me know if it doesn't answer your question. </nayna>
> >
> >1. EFI does not pass the log by any means AFAIK before a boot loader
> >    calls ExitBootServices().
> 
> So, is current TCPA support only for TPM1.2 ?

TCPA ACPI table is only available for TPM 1.2.

TPM2 ACPI table does not provide a memory ref for the event log.

> #2, TCG Spec http://www.trustedcomputinggroup.org/wp-content/uploads/EFI-Protocol-Specification-rev13-160330final.pdf
> talks about
> EFI_TCG2_PROTOCOL.GetEventLog (Section 6.5), what is that supposed to do ?

Direct quote from your reference:

"Boot Service Drivers are terminated when ExitBootServices() is called
and all memory resources consumed by the Boot Services Drivers are
released for use in the operating system environment."

> >2. I do not have any system with TPM2 that uses DT. And as I stated
> >    before you didn't have any reference where you derived the DT
> >    node fields.
> 
> As per Device Tree, so this is the new node introduced in the device tree to
> support TPM. And the fields are defined maintaining the requirements from
> ePAPR specification.

What is ePAPR specification? Can you provide a reference?

/Jarkko

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