KVM: PPC: Book3S HV: Pull out TM state save/restore into separate procedures
[ Upstream commit f024ee09 ] 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. Cc: stable@vger.kernel.org # v3.15+ Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
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