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Date:   Tue, 6 Oct 2020 18:53:22 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To:     Petr Vorel <pvorel@suse.cz>
Cc:     Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
        Mimi Zohar <zohar@linux.vnet.ibm.com>,
        linux-integrity@vger.kernel.org
Subject: Re: [PATCH v3 0/4] TPM 2.0 fixes in IMA tests
Message-ID: <20201006155322.GA111447@linux.intel.com>
References: <20200929165021.11731-1-pvorel@suse.cz>
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On Tue, Oct 06, 2020 at 12:01:30PM +0200, Petr Vorel wrote:
> Hi Jarkko,
> 
> can rely on /dev/tpm0 and /dev/tpmrm0 for TPM detection?
> i.e.:
> /dev/tpmrm0 => TPM 2.0
> /dev/tpm0 => both TPM 1.2 or 2.0
> none of them => No TPM device

I think that should work as tpmrm0 is unconditionally available for
TPM devices.

Since Linux v5.6 there has been a sysfs file called tpm_version_major
available too.

/Jarkko