powerpc/book3s: Queue up and process delayed MCE events.
authorMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Wed, 30 Oct 2013 14:35:49 +0000 (20:05 +0530)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Thu, 5 Dec 2013 05:05:21 +0000 (16:05 +1100)
commitb5ff4211a8294be2ddbaf963fa3666fa042292a8
treec87b212ebfddc4c42c54c61ee1b3fb3d49e0c941
parent36df96f8acaf51992177645eb2d781f766ce97dc
powerpc/book3s: Queue up and process delayed MCE events.

When machine check real mode handler can not continue into host kernel
in V mode, it returns from the interrupt and we loose MCE event which
never gets logged. In such a situation queue up the MCE event so that
we can log it later when we get back into host kernel with r1 pointing to
kernel stack e.g. during syscall exit.

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/include/asm/mce.h
arch/powerpc/kernel/entry_64.S
arch/powerpc/kernel/exceptions-64s.S
arch/powerpc/kernel/mce.c
arch/powerpc/platforms/powernv/opal.c