Re: USB pass through into Mac OS 9.x with qemu-system-ppc

[Howard Spoelstra <hsp.cat7@gmail.com>]

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On Tue, Feb 9, 2021 at 4:12 PM Gerd Hoffmann <kraxel@redhat.com> wrote:

>   Hi,
>
> > A noticeable issue when comparing the pcap files seems to be at Fedora
> pcap
> > frame 8 and Mac OS 9.2 pcap frame 28 (configuration descriptor). It seems
> > the Mac OS side is missing 5 bytes and hence the packet is malformed.
> > (A run with Mac OS 9.0 as guest showed that this guest only missed 1 byte
> > in the response.)
>
> That is normal.  Note that the configuration descriptor is requested
> twice:  Once with a buffer large enough to see the wTotalLength field.
> and then again with a buffer large enough for the whole descriptor.
>
> > Also visible in the Mac OS pcap file at frame 53 is that it seems a setup
> > package is contained in an URB that is not suited for it.
>
> Looks more like a bug in the qemu pcap code, probably have to set some
> flag to indicate the setup section doesn't contain valid data instead
> of just leaving it all blank.
>
> Frame 55 is probably the problematic one.  Look at the timestamps.  The
> device seems to not answer, then after a while macos seems to try reset
> the device.
>
> Also the fedora trace has the bulk transfer data so wireshark can decode
> usb-storage commands and the scsi command wrapped inside.  That is not
> the case in the macos trace.  Not sure whenever that is another bug in
> the pcap code.  It could also indicate the bug in the ohci emulation
> which in turn causes macos fail ...
>
> > Qemu-system-ppc is started like this for the Mac OS guest:
> > ./qemu-system-ppc \
> > -M mac99,via=pmu \
> > -m 512 \
> > -boot c \
> > -serial stdio \
> > -L pc-bios \
> > -drive file=/home/hsp/Mac-disks/9.2.img,format=raw,media=disk \
> > -device usb-host,vendorid=0x058f,productid=0x6387,pcap=macos92.pcap
>
> Does an emulated usb stick work with macos?
>
> Hi Gerd,

Thanks for getting back to me.
Yes, usb-storage works just fine with

-drive if=none,id=stick,file=/home/hsp/Mac-disks/9.0.img,format=raw \
-device usb-storage,drive=stick

Best,
Howard

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