According to the SDM, VMWRITE checks to see if the secondary source
operand corresponds to an unsupported VMCS field before it checks to
see if the secondary source operand corresponds to a VM-exit
information field and the processor does not support writing to
VM-exit information fields.

Fixes: 49f705c5 ("KVM: nVMX: Implement VMREAD and VMWRITE")
Signed-off-by: NJim Mattson <jmattson@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NPeter Shier <pshier@google.com>
Reviewed-by: NOliver Upton <oupton@google.com>
Reviewed-by: NJon Cargille <jcargill@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>