linux-kernel - Re: [PATCH 05/13] x86: Add early TPM1.2/TPM2.0 interface support for Secure Launch

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Date:   Fri, 25 Sep 2020 08:43:13 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Ross Philipson <ross.philipson@...cle.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        iommu@...ts.linux-foundation.org, linux-integrity@...r.kernel.org,
        linux-doc@...r.kernel.org, dpsmith@...rtussolutions.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        luto@...capital.net, trenchboot-devel@...glegroups.com
Subject: Re: [PATCH 05/13] x86: Add early TPM1.2/TPM2.0 interface support for
 Secure Launch

On Thu, Sep 24, 2020 at 10:58:33AM -0400, Ross Philipson wrote:
> From: "Daniel P. Smith" <dpsmith@...rtussolutions.com>
> 
> This commit introduces an abstraction for TPM1.2 and TPM2.0 devices
> above the TPM hardware interface.
> 
> Signed-off-by: Daniel P. Smith <dpsmith@...rtussolutions.com>
> Signed-off-by: Ross Philipson <ross.philipson@...cle.com>

This is way, way too PoC. I wonder why there is no RFC tag.

Please also read section 2 of

https://www.kernel.org/doc/html/v5.8/process/submitting-patches.html

You should leverage existing TPM code in a way or another. Refine it so
that it scales for your purpose and then compile it into your thing
(just include the necesary C-files with relative paths).

How it is now is never going to fly.

/Jarkko