From: Joel Stanley <joel@jms.id.au>
Date: Tue, 1 Apr 2014 03:58:19 +0000 (+1030)
Subject: powerpc/powernv: Add OPAL message log interface
X-Git-Tag: v3.15-rc1~43^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bfc36894a48b996eba7e02d8e43093a289c1fb91;p=pandora-kernel.git

powerpc/powernv: Add OPAL message log interface

OPAL provides an in-memory circular buffer containing a message log
populated with various runtime messages produced by the firmware.

Provide a sysfs interface /sys/firmware/opal/msglog for userspace to
view the messages.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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