From: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Date: Wed, 30 Oct 2013 14:35:11 +0000 (+0530)
Subject: powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power7.
X-Git-Tag: v3.14-rc1~80^2~57
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e22a22740c1ac23aaa10835f026b3549ee3e4e75;p=pandora-kernel.git

powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power7.

If we get a machine check exception due to SLB or TLB errors, then flush
SLBs/TLBs and reload SLBs to recover. We do this in real mode before turning
on MMU. Otherwise we would run into nested machine checks.

If we get a machine check when we are in guest, then just flush the
SLBs and continue. This patch handles errors for power7. The next
patch will handle errors for power8

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