KVM: nVMX: add CR4_LA57 bit to nested CR4_FIXED1
When L1 guest uses 5-level paging, it fails vm-entry to L2 due to invalid host-state. It needs to add CR4_LA57 bit to nested CR4_FIXED1 MSR. Signed-off-by: NChenyi Qiang <chenyi.qiang@intel.com> Reviewed-by: NXiaoyao Li <xiaoyao.li@intel.com> Reviewed-by: NLiran Alon <liran.alon@oracle.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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