powerpc/kvm: Remove redundant save of SIER AND MMCR2

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commit f73128f4f6 upstream.

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: 72cde5a88d ("KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8")
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Joel Stanley 2014-07-08 16:08:20 +09:30 • committed by Greg Kroah-Hartman

parent 89e1fc043f

commit 3b9ee8b773

1 changed files with 0 additions and 5 deletions

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arch/powerpc/kvm/book3s_hv_interrupts.S

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