lwepx faults needs to be handled by KVM and this implies additional code
in DO_KVM macro to identify the source of the exception originated from
host context. This requires to check the Exception Syndrome Register
(ESR[EPID]) and External PID Load Context Register (EPLC[EGS]) for DTB_MISS,
DSI and
lwepx faults needs to be handled by KVM. With the current solution
the host kernel searches for the faulting address using its LPID context.
If a host translation is found we return to the lwepx instr instead of the
fixup ending up in an infinite loop.
Revert the commit 1d628af7 "add load inst fix
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