This is required to allow creation of SNP coco on host kernel
(e.g. https://github.com/AMDESE/linux ,branch:snp-host-latest)
supporting guest private memory for SNP using gmem.
Note: This qemu does not work if the host kernel does not support
gmem/UPM.
Fixes: #9092
Signed-off-by: Niteesh Dubey <niteesh@us.ibm.com>
