Re: [Xen-devel] Bug: USB Bridge Will Not PassThru

[merc1984@xxxxxx]

On Wed, Jun 18, 2014, at 11:13, merc1984@xxxxxx wrote:

On Wed, Jun 18, 2014, at 10:22, Pasi Kärkkäinen wrote:

On Wed, Jun 18, 2014 at 09:26:56AM -0700, merc1984@xxxxxx wrote:

  On Wed, Jun 18, 2014, at 8:47, Pasi Kärkkäinen wrote:

 

    PVUSB is another option, it supports passthru of USB2 devices,

    but it requires special drivers in both dom0 and guest kernel.

 

 

  Thanks.  It appears though that most info is 5 years old.  And that the

  newest drivers are for kernel 2.6.32. (I'm running 3.14.1)  The consensus

  (at least 2 years ago) was that it doesn't work well.  In any case I can't

  find xen-usbback or xen-usbfront to compile.

 

  http://wiki.xen.org/wiki/Xen_USB_Passthrough et al.

 

 

Suse SLES11 classic xenlinux kernels do contain PVUSB drivers (Linux

3.x).

Also Konrad's git tree has some experimental version of PVUSB for 3.x.

 

But agreed getting PVUSB (drivers) to work requires some work.

 

Another thing you could do is to add the qemu-upstream VGA/GPU passthru

patches,

and use qemu-upstream.

 

I guess I'm in trouble now.  I crapped out and installed a USB PCIe adapter, set it for PCI passthru, and set the mouse, keyboard, and USB bridge for USB passthru to the domU.

 

Now when I boot the hypervisor kernel, it does not respond to the keyboard.  I -can- make a grub selection with it, but then can not enter the luks disk password for /. (of course I have a cleartext /boot)  I unplugged the keyboard from the PCIe interface and into several of the mobo USB ports, reset the machine, but no response.

 

Starting to feel damned.

 

I believe that I'm missing a couple of luks modules in /etc/initramfs-tools/modules.  Unfortunately the Debian rescue CD can't mount /dev/mapper/sda2_crypt due to some hidden error.  Chrooting into the installer environment also gives some hidden error when I try to mount.

 

 

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