VMMCI_F_ACK
vsc->sc_driver_features = VMMCI_F_TIMESYNC | VMMCI_F_ACK |
if (virtio_has_feature(vsc, VMMCI_F_ACK) == 0)
if ((cmd != VMMCI_NONE) && virtio_has_feature(vsc, VMMCI_F_ACK))
VMMCI_F_TIMESYNC | VMMCI_F_ACK | VMMCI_F_SYNCRTC);