https://github.com/torvalds/linux
Revision f73128f4f680e8be68cda831f2710214559583cb authored by Joel Stanley on 08 July 2014, 06:38:20 UTC, committed by Benjamin Herrenschmidt on 11 July 2014, 02:55:07 UTC
These two registers are already saved in the block above. Aside from
being unnecessary, by the time we get down to the second save location
r8 no longer contains MMCR2, so we are clobbering the saved value with
PMC5.

MMCR2 primarily consists of counter freeze bits. So restoring the value
of PMC5 into MMCR2 will most likely have the effect of freezing
counters.

Fixes: 72cde5a88d37 ("KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8")
Cc: stable@vger.kernel.org
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
1 parent c733cf8
History
Tip revision: f73128f4f680e8be68cda831f2710214559583cb authored by Joel Stanley on 08 July 2014, 06:38:20 UTC
powerpc/kvm: Remove redundant save of SIER AND MMCR2
Tip revision: f73128f
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