linux-kernel - Re: Fwd: Re: [tpmdd-devel] [PATCH v9 2/2] tpm: add securityfs support,for TPM 2.0 firmware event log

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Message-ID: <20170131223106.faap5tfrd4qquhqv@intel.com>
Date:   Wed, 1 Feb 2017 00:31:06 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     James Morris <jmorris@...ei.org>
Cc:     Kenneth Goldman <kgoldman@...ibm.com>,
        "moderated list:TPM DEVICE DRIVER" 
        <tpmdd-devel@...ts.sourceforge.net>,
        open list <linux-kernel@...r.kernel.org>,
        linux-security-module@...r.kernel.org
Subject: Re: Fwd: Re: [tpmdd-devel] [PATCH v9 2/2] tpm: add securityfs
 support,for TPM 2.0 firmware event log

On Wed, Feb 01, 2017 at 08:46:32AM +1100, James Morris wrote:
> On Tue, 31 Jan 2017, Jarkko Sakkinen wrote:
> 
> > James,
> > 
> > The discussion is about two features:
> > 
> > 1. Extension to tpm_pcr_extend() (used by IMA) to extend all PCR banks
> >    instead of just SHA-1 banks. It is recommended by TCG to do so in
> >    order to prevent malicious use of PCRs.
> > 2. TPM 2.0 event log with backend support for OF device tree (for
> >    getting address where you can grab it).
> > 
> > These are required as baseline to implement full TPM 2.0 support for
> > IMA. The commits are fairly well baked and went through many iterations.
> > I've tested tpm_pcr_extend() patches. I haven't tested event log patches
> > but have extensively reviewed them and Ken Goldman has tested them with
> > POWER hardware.
> > 
> > I don't believe that there is major risk to put them already into 4.11
> > but it is fairly late so I just want a second opinion before putting
> > them into pull request.
> > 
> 
> I'll take this for 4.11.  IMA + TPM 2.0 is still developmental and not in 
> wide use, afaik.
> 
> 
> 
> -- 
> James Morris
> <jmorris@...ei.org>

Great! I'll prepare the pull request tomorrow (it's now 12:30AM in
Finland). Thank you.

/Jarkko