KVM: s390: vsie: Use virt_to_phys for facility control block

In order for SIE to interpretively execute STFLE, it requires the real
or absolute address of a facility-list control block.
Before writing the location into the shadow SIE control block, convert
it from a virtual address.
We currently do not run into this bug because the lower 31 bits are the
same for virtual and physical addresses.

Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Link: https://lore.kernel.org/r/20240319164420.4053380-3-nsg@linux.ibm.com


Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20240319164420.4053380-3-nsg@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>