powerpc/pseries/mce: restore msr before returning from handler

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The pseries real-mode machine check handler can enable the MMU, and
return from the handler with the MMU still enabled.

This works, but real-mode handler wrapper exit handlers want to rely
on the MMU being in real-mode. So change the pseries handler to
restore the MSR after it has finished virtual mode tasks.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1612702361.lm7fqo56re.astroid@bobo.none

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Nicholas Piggin 2021-02-07 22:54:12 +10:00 • committed by Michael Ellerman

parent 56acfdd8bf

commit 74c3354bc1

1 changed files with 15 additions and 4 deletions

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arch/powerpc/platforms/pseries/ras.c

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