tree a2429363b192b759a0d4d27c8403f062a6fbbaf3
parent 6e556b471036b751aaa1a1b5a189eff76b1a2d0b
author Joel Stanley <joel@jms.id.au> 1396324699 +1030
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1397011999 +1000

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>