Hi Qu Wenruo,
On 06/06/2017 09:38 AM, Qu Wenruo wrote:
Check PRP or SGL for Data Transfer(PSDT) flag for admin and read/write
commands.
For NVMe-over-PCIE, admin sq entry should not set SGL bits.
and rw sq entry PSDT flag should not be set beyond controller support.
Although currently either linux kernel NVMe-over-PCIE host driver uses
SGL nor qemu nvme controller supports it, it's never a bad idea to
enhance the check.
Interesting work! By some coincidence, I have a similar need to exercise
SGL data transfers in NVMe-over-PCIe using a patched host driver and to
(somehow) test it. I have a forked NVMe driver from the 4.10 kernel,
supporting SGL data transfers, based partly on this patch:
http://lists.infradead.org/pipermail/linux-nvme/2013-December/000596.html
If you're making some progress, perhaps we can test this forked driver's
SGL data transfers against QEMU. Drop me a mail if you're interested in
working together.
Thanks and regards,
Andrew
