s390-ccw-virtio: allow for systems larger that 7.999TB
KVM does not allow memory regions > KVM_MEM_MAX_NR_PAGES, basically limiting the memory per slot to 8TB-4k. As memory slots on s390/kvm must be a multiple of 1MB we need start a new memory region if we cross 8TB-1M. With that (and optimistic overcommitment in the kernel) I was able to start a 24TB guest on a 1TB system. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20171211122146.162430-1-borntraeger@de.ibm.com> Reviewed-by: NDavid Hildenbrand <david@redhat.com> [CH: 1UL -> 1ULL in KVM_MEM_MAX_NR_PAGES; build fix on 32 bit hosts] Signed-off-by: NCornelia Huck <cohuck@redhat.com> (cherry picked from commit bb223055) Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>
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