powerpc/powernv: new function to access OPAL msglog

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Currently, the OPAL msglog/console buffer is exposed as a sysfs file, with
the sysfs read handler responsible for retrieving the log from the OPAL
buffer. We'd like to be able to use it in xmon as well.

Refactor the OPAL msglog code to create a new function, opal_msglog_copy(),
that copies to an arbitrary buffer. Separate the initialisation code into
generic memcons init and sysfs file creation.

Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Andrew Donnellan 2016-02-09 18:17:48 +11:00 • committed by Michael Ellerman

parent 31f6a4ada1

commit 9b4fffa149

3 changed files with 27 additions and 12 deletions

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3

arch/powerpc/include/asm/opal.h

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29

arch/powerpc/platforms/powernv/opal-msglog.c

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7

arch/powerpc/platforms/powernv/opal.c

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