10.4. Known Limitations of Emulated Devices
The following are known limitations:
1 The Qemu e1000 RX path does not support multiple descriptors/buffers per packet. Therefore, rte_mbuf should be big enough to hold the whole packet. For example, to allow testpmd to receive jumbo frames, use the following:
testpmd [options] – –mbuf-size=<your-max-packet-size>
2 Qemu e1000 does not validate the checksum of incoming packets.
3 Qemu e1000 only supports one interrupt source, so link and Rx interrupt should be exclusive.
4 Qemu e1000 does not support interrupt auto-clear, application should disable interrupt immediately when woken up.