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Date:   Fri, 25 Oct 2019 07:52:02 -0500
From:   "Serge E. Hallyn" <serge@hallyn.com>
To:     Petr Vorel <pvorel@suse.cz>
Cc:     Jerry Snitselaar <jsnitsel@redhat.com>,
        Mimi Zohar <zohar@linux.ibm.com>,
        Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
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        Peter Huewe <peterhuewe@gmx.de>, Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [LTP] [PATCH] ima: skip verifying TPM 2.0 PCR values
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On Fri, Oct 25, 2019 at 10:56:17AM +0200, Petr Vorel wrote:
> Hi,
> 
> > /sys/kernel/security/tpmX/major_version (on fedora and rhel at least, is it elsewhere on other distros?)
> 
> > versus
> 
> > /sys/class/tpm/tpmX/major_version
> 
> Is it more HW related (/sys/class/tpm/tpmX) or LSM related
> (/sys/kernel/security/tpmX)?
> I guess /sys/kernel/security/tpmX might be better.

This is purely about whether the phsyical TPM chip is 1.2 or 2.,
right?  /sys/class/tpm/tpmX is where I would expect to find that.

> Thanks for implementing this, I'll try to test it soon.

Yes, it's been a pain point, and someone (..., I) should have done this years
ago - thanks!