[vfio-users] RocketRaid 1144c / AsMedia 1042a

[Alex Williamson]

On Tue, Aug 25, 2015 at 7:36 AM, Bradley Davis <bradleydavisjr at gmail.com>
wrote:

> I have a 1144E and was able to pass the individual controllers through to
> different VMs. My only issue was stability with the USB 3 controllers. They
> would cause my VMs to crash or hang, when hung I would have to reboot the
> host. I haven't run into this issue since I removed the card. I updated the
> firmware on the USB 3 controllers and it didn't help. The SATA controllers
> passed through just fine, but I didn't have an eSATA to plug into it.
>

I've also tried to assign an asmedia 1042 USB3 controller and was plagued
with hangs on reboot, apparently in the OVMF XHCI driver.  I switched to an
NEC chip and it's been working well.   In my personal opinion
</disclaimer>, asmedia is crap.  My personal favorite for USB3 is TI, but
that's only based on bare metal behavior with mass storage devices, I
haven't actually tried to assign it yet.

Remember folks, device assignment is operating in a mode that's really not
common for consumer devices and components from value manufacturers do not
necessarily comply sufficiently with standards to work.  We see this on
realtek nics, asmedia <anything>, marvel SATA controllers, and there will
surely be more to discover.  Thanks,

Alex
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