Christian Borntraeger 1526bf9ccf
KVM: s390: add capability indicating COW support ...
Currently qemu/kvm on s390 uses a guest mapping that does not
allow the guest backing page table to be write-protected to
support older systems. On those older systems a host write
protection fault will be delivered to the guest.
Newer systems allow to write-protect the guest backing memory
and let the fault be delivered to the host, thus allowing COW.
Use a capability bit to tell qemu if that is possible.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com >
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com >
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com >
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