Hi Tetsuya,
  

Hi Jianfeng and Xie,

I guess my implementation and yours have a lot of common code, so I will
try to rebase my patch on yours.

We also think so. And before you rebase your code, I think we can rely 
on Yuanhan's
struct virtio_pci_ops to make the code structure brief and clear, as 
discussed in your
patch's thread, i.e., we both rebase our code according to Yuanhan's 
code. Is that OK?

BTW, one thing I need to change your memory allocation way is that
mmaped address should be under 44bit(32 + PAGE_SHIFT) to work with my patch.
This is because VIRTIO_PCI_QUEUE_PFN register only accepts such address.
(I may need to add one more EAL parameter like "--mmap-under <address>")

It makes sense.

Thanks,
Jianfeng

Thanks,
Tetsuya