KVM: s390: Enable adapter_indicators_set to use mapped pages

KVM: s390: Enable adapter_indicators_set to use mapped pages

The s390 adapter_indicators_set function can now be optimized to use
long-term mapped pages when available so that work can be
processed on a fast path when interrupts are disabled.
If adapter indicator pages are not mapped then local mapping is
done on a slow path as it is prior to this patch. For example, Secure
Execution environments will take the local mapping path as it does prior to
this patch.

Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Douglas Freimuth <freimuth@linux.ibm.com>
Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260604192755.203143-3-freimuth@linux.ibm.com>