powerpc: Fix the corrupt r3 error during MCE handling.

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During Machine Check interrupt on pseries platform, R3 generally points to
memory region inside RTAS (FWNMI) area. We see r3 corruption because when RTAS
delivers the machine check exception it passes the address inside FWNMI area
with the top most bit set. This patch fixes this issue by masking top two bit
in machine check exception handler.

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Mahesh Salgaonkar 2013-07-10 18:32:56 +05:30 • committed by Benjamin Herrenschmidt

parent 5d7ead0039

commit ee1dd1e3dc

1 changed files with 3 additions and 0 deletions

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arch/powerpc/platforms/pseries/ras.c

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