KVM: PPC: Book3S HV: Pull out TM state save/restore into separate procedures

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commit f024ee0984 upstream.

This moves the transactional memory state save and restore sequences
out of the guest entry/exit paths into separate procedures.  This is
so that these sequences can be used in going into and out of nap
in a subsequent patch.

The only code changes here are (a) saving and restore LR on the
stack, since these new procedures get called with a bl instruction,
(b) explicitly saving r1 into the PACA instead of assuming that
HSTATE_HOST_R1(r13) is already set, and (c) removing an unnecessary
and redundant setting of MSR[TM] that should have been removed by
commit 9d4d0bdd9e0a ("KVM: PPC: Book3S HV: Add transactional memory
support", 2013-09-24) but wasn't.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Paul Mackerras 2016-06-22 14:21:59 +10:00 • committed by Greg Kroah-Hartman

parent be7acd281e

commit e1a90eb8af

1 changed files with 237 additions and 212 deletions

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arch/powerpc/kvm/book3s_hv_rmhandlers.S

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