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Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest |
Date: |
Tue, 05 Nov 2013 18:38:15 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2013-11-05 17:01, Frederich, Jens wrote:
> Hi all,
>
> we're currently evaluating different RTOS systems (Windows CE, Intime, RTX,
> etc.).
> One system is Linux RT + KVM/QEMU with a Windows 7 guest. Up to now all
> works fine, Linux RT has good latency and KVM/Qemu setup was easy. But one
> QEMU bug
> breaks my measurement setup and evaluation.
>
> I've some usb devices for the Windows 7 guest. I configure them as USB
> passthrough.
> The devices appears in the device manager of Windows 7, but with
> "Error code 10": device cannot start". The Windows driver fails on USB set
> configuration.
> The driver creates a IRP and send it via IOCTRL to lower layer. The IOCTRL
> fails with
> invalid parameter.
>
> driver log:
> 00000009 0.65470564 vnCDrvUsbControlRequestSetConfiguration,
> WdfUsbTargetDeviceSelectConfig single interface failed 0xc000000d
> 00000010 0.65472370 vnCDrvUsbIFPrepareHardwareState,
> vnCDrvUsbControlRequestSetConfiguration failed: 0xc000000d
> 00000011 0.65473646 vnCDrvDevConPrepareHardware,
> vnCDrvUsbIFPrepareHardwareState failed 0xc000000d
> 00000012 0.65474838 vnCDrvEvtDevicePrepareHardware,
> vnCDrvDevConPrepareHardware failed 0xc0000001
> 00000013 0.6547
>
> This bug breaks my latency measurement setup and Linux RT is out of the
> evaluationg
> race. Windows CE should not win :-), it there anyway workaround or hack to
> fix the issue?
Workaround: Pass-through one of the (typically) many USB host
controllers to the Windows guest (vfio or classic pci-assign). I did
this back then when *HCI emulation was still pretty immature.
But USB device pass-through should also work. Do you happen to pass a
USB 2.0 device via an emulated UHCI? Or are you already using the EHCI
emulation? In the latter case, activating USB tracing (see also
qemu/docs/tracing.txt) and posting the results here may help analysing
the issue.
Jan
--
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux
- [Qemu-devel] USB Passthrough not working for Windows 7 guest, Frederich, Jens, 2013/11/05
- Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest,
Jan Kiszka <=
- Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest, Jens Frederich, 2013/11/05
- Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest, Jan Kiszka, 2013/11/06
- Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest, Frederich, Jens, 2013/11/06
- Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest, Gerd Hoffmann, 2013/11/06
- Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest, Frederich, Jens, 2013/11/06
- Re: [Qemu-devel] USB Passthrough not working for Windows 7 guest, Gerd Hoffmann, 2013/11/06