linux-kernel - Re: [RFC PATCH v2 4/4] tsm: Allow for extending and reading configured RTMRs

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Message-ID: <ec7edddcf8c74e48cb392db0789b03243ab05692.camel@HansenPartnership.com>
Date: Fri, 10 May 2024 22:57:37 -0400
From: James Bottomley <James.Bottomley@...senPartnership.com>
To: Samuel Ortiz <sameo@...osinc.com>, Dan Williams
 <dan.j.williams@...el.com>
Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>,
  Qinkun Bao <qinkun@...gle.com>, "Yao, Jiewen" <jiewen.yao@...el.com>,
 "Xing, Cedric" <cedric.xing@...el.com>, Dionna Amalie Glaze
 <dionnaglaze@...gle.com>,  biao.lu@...el.com, linux-coco@...ts.linux.dev,
 linux-integrity@...r.kernel.org,  linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 4/4] tsm: Allow for extending and reading
 configured RTMRs

I'm not really sure where to hang this, since there's no posted agenda
or materials for the CCC meeting today.  I'm afraid I also don't have a
copy of the presentation to point people who weren't at the meeting to.
However, it struck me you missed a third option: use the ima log
format.  This has the advantage that we can define additional events
and have them published with a kernel patch (the IMA log format is
defined in the kernel).  Thanks to the TCG, it's also CEL compatible
but doesn't require any sort of TCG blessing of the events.  Plus we
also have existing kernel infrastructure to log to that format.

Regards,

James