[vfio-users] Creative ZXRi onboard passthrough

[Alex Williamson]

On Tue, Oct 27, 2015 at 3:01 PM, Eric Hattemer <hattenator at gmail.com> wrote:

> Hi everyone, and thanks to all who have written blogs and forum posts and
> whatnot with the information that's gotten me to where I am so far.
>
> I have a GIGABYTE G1 Gaming GA-Z170X-Gaming G1 motherboard that comes with
> a Sound Blaster ZxRi chip onboard.  I've managed to get my GeForce card
> passthrough with vfio, and working with Windows. The last trick was the
> -cpu kvm=off flag.  But whatever I've tried, I can't get the Sound Blaster
> to go through.  Part of the problem is that I don't really understand what
> the chip even is.  Nothing in lspci says anything about 'Sound Blaster' or
> 'Creative'.  `sudo lspci -nn|grep -E '1102|1274'` returns nothing.  Maybe I
> need to boot directly into Windows to see what it calls it.  But I think
> it's this one:
>
> 00:1f.3 Multimedia audio controller [0401]: Intel Corporation Sunrise
> Point-H HD Audio [8086:a170] (rev 31)
>

Nope, that's the integrated Intel audio.


> But I've also seen that quoted as part of the Intel integrated graphics,
> so I'm a little confused.  Is it that Creative just rebrands the chip made
> by Intel, and adds some surround sound processing in the driver so that
> they can say they did something?
>
> Anyway, if I add -device vfio-pci,host=00:1f.3 to the qemu line, I get a
> lot of:
> qemu-system-x86_64: vfio: Cannot reset device 0000:00:1f.3, no available
> reset mechanism.
>

Just a warning.


> warnings.  Then Windows sees a multimedia audio device with no driver.  If
> I run the Creative installer, it says there's no recognized device and
> refuses to install.


Not surprising, that's not the device you're intending to assign, not to
mention it's entangled with all sorts of motherboard management functions
because z170 sucks.  lspci please.
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