TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED
ret = TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED;
vcpu->run->tdx.get_quote.ret = TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED;
vcpu->run->tdx.setup_event_notify.ret = TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED;
tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED);