linux-kernel - LockDown that allows read of /dev/mem ?

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Date:   Sat, 19 Jun 2021 16:55:11 -0700
From:   "David F." <df7729@...il.com>
To:     linux-kernel <linux-kernel@...r.kernel.org>
Subject: LockDown that allows read of /dev/mem ?

I'm finding that LockDown Integrity prevents blocks things like mdadm,
Xvesa, and a couple of my specialized tools.    There should be an
option to allow /dev/mem read access.  Is there?  There are no secrets
to the boot disk booted environment it's all root.

?