VR_PENDING
vie->mmio_req_read.state = VR_PENDING;
vie->mmio_req_write.state = VR_PENDING;
vie->inout_req_state = VR_PENDING;
if (vie->mmio_req_read.state == VR_PENDING) {
} else if (vie->mmio_req_write.state == VR_PENDING) {
if (pending->state != VR_PENDING ||