powerpc/powernv: Add ultravisor message log interface

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The ultravisor (UV) provides an in-memory console which follows the
OPAL in-memory console structure.

This patch extends the OPAL msglog code to initialize the UV memory
console and provide the "/sys/firmware/ultravisor/msglog" interface
for userspace to view the UV message log.

Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Tested-by: Claudio Carvalho <cclaudio@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190828130521.26764-2-mpe@ellerman.id.au

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Claudio Carvalho 2019-08-28 23:05:21 +10:00 • committed by Michael Ellerman

parent dea45ea777

commit 68e0aa8ec5

2 changed files with 50 additions and 0 deletions

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5

arch/powerpc/platforms/powernv/powernv.h

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45

arch/powerpc/platforms/powernv/ultravisor.c

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