[Qemu-block] NVME: is there any plan to support SGL data transfer?

[Qu Wenruo]

Hi,

When going through NVMe specification and hw/block/nvme.c,
I found that it seems that NVMe qemu implementation only support PRP for 
sq entry.
And NvmeRwCmd doesn't even use union to define DPTR, but just prp1 and prp2.
Although I am just a newbie, but I'm quite interested in NVMe and want 
to try to implement SGL support for qemu NVMe.

Is there anyone already doing such work? Or is there any plan on 
implement such feature?

Thanks,
Qu