Xen users - Apr 2010 - Xen 4 VGA Passthrough - Keyboard/Mouse?

I''ve just installed Xen 4 and am working to get VGA passthrough
configured.  I seem to have that piece successfully configured, but,
unfortunately, have no keyboard and mouse support in my new VM.  If I try USB
pass-through, I get the following error message in the
qemu-dm-<domain>.log file:

husb: open device 7.2
husb: config #1 need -1
husb: 1 interfaces claimed for configuration 1
husb: grabbed usb device 7.2
usb_linux_update_endp_table: Broken pipe
Warning: could not add USB device host:0488:00df

Yes, I have verified that usbfs is mounted on /proc/bus/usb - this is not the
issue.  I decided to try forwarding through the entire USB controller using PCI.
The challenge here is that there are about 7 different PCI devices that make up
the USB controller (integrated into the motherboard).  I added all of these
devices to the pciback.hide option at boot time, then tried to forward them
through to the HVM domU, but for some reason this does not work - the devices
are never reported under "pci-list-assignable-devices" as assignable,
and when I try to start the VM, I get errors about pciback not owning the PCI
devices.

Can someone offer any advice as to the best way to get the keyboard and mouse
forwarded through along with VGA?

Thanks!
-Nick



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On Thu, Apr 08, 2010 at 11:49:01AM -0600, Nick Couchman
wrote:
> I''ve just installed Xen 4 and am working to get VGA passthrough
configured.  I seem to have that piece successfully configured, but,
unfortunately, have no keyboard and mouse support in my new VM.  If I try USB
pass-through, I get the following error message in the
qemu-dm-<domain>.log file:
> 
> husb: open device 7.2
> husb: config #1 need -1
> husb: 1 interfaces claimed for configuration 1
> husb: grabbed usb device 7.2
> usb_linux_update_endp_table: Broken pipe
> Warning: could not add USB device host:0488:00df
> 
Was the USB device in use in dom0? 

Does this wiki page help?:
http://wiki.xensource.com/xenwiki/XenUSBPassthrough
> Yes, I have verified that usbfs is mounted on /proc/bus/usb - this is not
the issue.  I decided to try forwarding through the entire USB controller using
PCI.  The challenge here is that there are about 7 different PCI devices that
make up the USB controller (integrated into the motherboard).  I added all of
these devices to the pciback.hide option at boot time, then tried to forward
them through to the HVM domU, but for some reason this does not work - the
devices are never reported under "pci-list-assignable-devices" as
assignable, and when I try to start the VM, I get errors about pciback not
owning the PCI devices.
>
Which dom0 kernel are you using? 

Did you read this:
http://wiki.xensource.com/xenwiki/XenPCIpassthrough

Especially the fact that pvops dom0 kernel has xen-pciback and not just
pciback..


I assume you also read this?:
http://wiki.xensource.com/xenwiki/XenVGAPassthrough

-- Pasi
> 
> Can someone offer any advice as to the best way to get the keyboard and
mouse forwarded through along with VGA?
> 
> Thanks!
> -Nick
> 
> 
> 
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On Apr 08, Nick Couchman [Nick.Couchman@seakr.com]
wrote:
> I''ve just installed Xen 4 and am working to get VGA passthrough
> configured.  I seem to have that piece successfully configured, but,
> unfortunately, have no keyboard and mouse support in my new VM.  If I try
> USB pass-through, I get the following error message in the
> qemu-dm-<domain>.log file:
I am getting ready to attempt this as well so please let us know if you
figure it out whether anyone here has the answer or not.

I did note with some concern that the current
http://wiki.xensource.com/xenwiki/XenDom0Kernels states the pv_ops kernel
lacks usbback, but http://wiki.xensource.com/xenwiki/XenDom0Kernels
recently indicated vga passthrough was only available in the pv_ops kernel.
The latter page was modified today or yesterday to no longer have that
chart, though, and the version on
http://wiki.xensource.com/xenwiki/XenKernelFeatures doesn''t say
anything
about vga passthrough.

So I don''t really know the real state, but that at least looked like
you
could have either hvm vga passthrough OR hvm usb passthrough.

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On Apr 08, Jeremy Blosser [jblosser-xen@firinn.org]
wrote:
> So I don''t really know the real state, but that at least looked
like you
> could have either hvm vga passthrough OR hvm usb passthrough.
Oops, just saw the earlier thread mentioning that new page and Pasi
indicating he didn''t think gfx passthrough was a kernel piece at all. 
If
that''s the case it''s not an issue...

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On Thu, Apr 08, 2010 at 01:11:01PM -0500, Jeremy Blosser
wrote:
> On Apr 08, Nick Couchman [Nick.Couchman@seakr.com] wrote:
> > I''ve just installed Xen 4 and am working to get VGA
passthrough
> > configured.  I seem to have that piece successfully configured, but,
> > unfortunately, have no keyboard and mouse support in my new VM.  If I
try
> > USB pass-through, I get the following error message in the
> > qemu-dm-<domain>.log file:
> 
> I am getting ready to attempt this as well so please let us know if you
> figure it out whether anyone here has the answer or not.
> 
> I did note with some concern that the current
> http://wiki.xensource.com/xenwiki/XenDom0Kernels states the pv_ops kernel
> lacks usbback, but http://wiki.xensource.com/xenwiki/XenDom0Kernels
> recently indicated vga passthrough was only available in the pv_ops kernel.
> The latter page was modified today or yesterday to no longer have that
> chart, though, and the version on
> http://wiki.xensource.com/xenwiki/XenKernelFeatures doesn''t say
anything
> about vga passthrough.
> 
> So I don''t really know the real state, but that at least looked
like you
> could have either hvm vga passthrough OR hvm usb passthrough.
> 
usbback is only required for _pvusb_, not for the traditional qemu USB 1.1
passthrough!

VGApassthrough should work OK with pvops dom0 kernel.. it''s mainly
about Xen doing correct things.

-- Pasi


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On Thu, Apr 08, 2010 at 09:55:59PM +0300, Pasi Kärkkäinen
wrote:
> On Thu, Apr 08, 2010 at 01:11:01PM -0500, Jeremy Blosser wrote:
> > On Apr 08, Nick Couchman [Nick.Couchman@seakr.com] wrote:
> > > I''ve just installed Xen 4 and am working to get VGA
passthrough
> > > configured.  I seem to have that piece successfully configured,
but,
> > > unfortunately, have no keyboard and mouse support in my new VM. 
If I try
> > > USB pass-through, I get the following error message in the
> > > qemu-dm-<domain>.log file:
> > 
> > I am getting ready to attempt this as well so please let us know if
you
> > figure it out whether anyone here has the answer or not.
> > 
> > I did note with some concern that the current
> > http://wiki.xensource.com/xenwiki/XenDom0Kernels states the pv_ops
kernel
> > lacks usbback, but http://wiki.xensource.com/xenwiki/XenDom0Kernels
> > recently indicated vga passthrough was only available in the pv_ops
kernel.
> > The latter page was modified today or yesterday to no longer have that
> > chart, though, and the version on
> > http://wiki.xensource.com/xenwiki/XenKernelFeatures doesn''t
say anything
> > about vga passthrough.
> > 
> > So I don''t really know the real state, but that at least
looked like you
> > could have either hvm vga passthrough OR hvm usb passthrough.
> > 
> 
> usbback is only required for _pvusb_, not for the traditional qemu USB 1.1
passthrough!
> 
> VGApassthrough should work OK with pvops dom0 kernel.. it''s mainly
about Xen doing correct things.
> 
See: http://wiki.xensource.com/xenwiki/XenUSBPassthrough

-- Pasi


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> 
> Which dom0 kernel are you using? 
I''m running openSuSE 11.2, so it is not the PV OPS dom0, nor is it
2.6.18, exactly.  Closer to 2.6.18, though, I believe.
> 
> Did you read this:
> http://wiki.xensource.com/xenwiki/XenPCIpassthrough
> 
> Especially the fact that pvops dom0 kernel has xen-pciback and not just 
> pciback..
Yep...and I actually managed to get PCI forwarding for the video card and the
USB controller working...mostly.  I''m still getting an error when I try
to forward PCI devices for my USB 2.0 controller through - the error is this:

Error: pci: 0000:00:1d.7: non-page-aligned MMIO BAR found

If I just do the USB 1.1 controllers, it works fine - both of the on-board 2.0
controllers behave this way, though.  I have tried the guestdev, reassigndev,
and reassign_resources parameters on the kernel boot line, to no avail.  Any
further hints on this front would be appreciated!
> 
> 
> I assume you also read this?:
> http://wiki.xensource.com/xenwiki/XenVGAPassthrough
> 
> -- Pasi
Yep - got this working, no problem!

Thanks!

-Nick



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On Thu, Apr 08, 2010 at 01:20:22PM -0600, Nick Couchman
wrote:
> > 
> > Which dom0 kernel are you using? 
> 
> I''m running openSuSE 11.2, so it is not the PV OPS dom0, nor is it
2.6.18, exactly.  Closer to 2.6.18, though, I believe.
> 
OK.
> > 
> > Did you read this:
> > http://wiki.xensource.com/xenwiki/XenPCIpassthrough
> > 
> > Especially the fact that pvops dom0 kernel has xen-pciback and not
just
> > pciback..
> 
> Yep...and I actually managed to get PCI forwarding for the video card and
the USB controller working...mostly.  I''m still getting an error when I
try to forward PCI devices for my USB 2.0 controller through - the error is
this:
> 
> Error: pci: 0000:00:1d.7: non-page-aligned MMIO BAR found
>
http://wiki.xensource.com/xenwiki/XenPCIpassthrough has an entry about exactly
this problem..
> If I just do the USB 1.1 controllers, it works fine - both of the on-board
2.0 controllers behave this way, though.  I have tried the guestdev,
reassigndev, and reassign_resources parameters on the kernel boot line, to no
avail.  Any further hints on this front would be appreciated!
> 
You need to figure out the proper parameter for your kernel, and use it.. it
should fix the problem.

What''s the exact dom0 kernel version you have? 

-- Pasi



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> 
> http://wiki.xensource.com/xenwiki/XenPCIpassthrough has an entry about 
> exactly this problem.. 
> 
>> If I just do the USB 1.1 controllers, it works fine - both of the
on-board 2.0
> controllers behave this way, though.  I have tried the guestdev,
reassigndev,
> and reassign_resources parameters on the kernel boot line, to no avail. 
Any
> further hints on this front would be appreciated!
>> 
> 
> You need to figure out the proper parameter for your kernel, and use it..
it
> should fix the problem.
> 
> What''s the exact dom0 kernel version you have? 
My kernel version is:
2.6.31.12-0.2-xen

(Not PVOPS)

pciback.hide option seems to work, so I''ve attempted to add both the
"reassigndev" and "reassign_resources" options to the boot
prompt.  This has not worked.  I also have the pciback.permissive option.

-Nick



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On Thu, Apr 08, 2010 at 01:55:26PM -0600, Nick Couchman
wrote:
> > 
> > http://wiki.xensource.com/xenwiki/XenPCIpassthrough has an entry about
> > exactly this problem.. 
> > 
> >> If I just do the USB 1.1 controllers, it works fine - both of the
on-board 2.0
> > controllers behave this way, though.  I have tried the guestdev,
reassigndev,
> > and reassign_resources parameters on the kernel boot line, to no
avail.  Any
> > further hints on this front would be appreciated!
> >> 
> > 
> > You need to figure out the proper parameter for your kernel, and use
it.. it
> > should fix the problem.
> > 
> > What''s the exact dom0 kernel version you have? 
> 
> My kernel version is:
> 2.6.31.12-0.2-xen
> 
> (Not PVOPS)
> 
> pciback.hide option seems to work, so I''ve attempted to add both
the "reassigndev" and "reassign_resources" options to the
boot prompt.  This has not worked.  I also have the pciback.permissive option.
> 
Did you try: pci=resource_alignment=0X:0Y.0

Maybe all 2.6.3x kernels use that syntax? 

-- Pasi


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>> 
> 
> Did you try: pci=resource_alignment=0X:0Y.0
> 
> Maybe all 2.6.3x kernels use that syntax? 
> 
Aha!  I had to try it a few times to get the syntax correct for multiple devices
- seems that you need a ";" between multiple PCI devices for this
argument, instead of the "," or "()" for the other
arguments.  Seems to be working, now, though!

Thanks, Pasi!

-Nick



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On Thu, Apr 08, 2010 at 03:09:01PM -0600, Nick Couchman
wrote:
> >> 
> > 
> > Did you try: pci=resource_alignment=0X:0Y.0
> > 
> > Maybe all 2.6.3x kernels use that syntax? 
> > 
> 
> Aha!  I had to try it a few times to get the syntax correct for multiple
devices - seems that you need a ";" between multiple PCI devices for
this argument, instead of the "," or "()" for the other
arguments.  Seems to be working, now, though!
> 
Can you please paste an example here.. I can then update the wiki page.
> Thanks, Pasi!
> 
No problems.. nice to hear it works.
What VGA adapter are you using btw? 

-- Pasi
> -Nick
> 
> 
> 
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> 
> Can you please paste an example here.. I can then update the wiki page.
My boot entry looks like this:

title Xen -- openSUSE 11.2 - 2.6.31.12-0.2 Hide
    root (hd0,1)
    kernel /boot/xen.gz com1=115200,8n1 console=com1
    module /boot/vmlinuz-2.6.31.12-0.2-xen
root=/dev/disk/by-id/ata-ST3160815AS_9RXC1XN0-part2 showopts pciback.permissive
pciback.hide=(00:02.0)(00:02.1)(00:1d.0)(00:1d.1)(00:1d.2)(00:1d.7)(00:1a.0)(00:1a.1)(00:1a.7)(00:1b.0)
pci=resource_alignment=00:1a.7;00:1d.7 console=ttyS0
    module /boot/initrd-2.6.31.12-0.2-xen
> 
>> Thanks, Pasi!
>> 
> 
> No problems.. nice to hear it works.
> What VGA adapter are you using btw? 
The machine is a Dell Optiplex 755, and I''m using the on-board video
adapter, an Intel Q35 Express.  lspci shows it as:

00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express Integrated
Graphics Controller (rev 02)
00:02.1 Display controller: Intel Corporation 82Q35 Express Integrated Graphics
Controller (rev 02)

-Nick




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On Thu, Apr 08, 2010 at 03:32:30PM -0600, Nick Couchman
wrote:
> > 
> > Can you please paste an example here.. I can then update the wiki
page.
> 
> My boot entry looks like this:
> 
> title Xen -- openSUSE 11.2 - 2.6.31.12-0.2 Hide
>     root (hd0,1)
>     kernel /boot/xen.gz com1=115200,8n1 console=com1
>     module /boot/vmlinuz-2.6.31.12-0.2-xen
root=/dev/disk/by-id/ata-ST3160815AS_9RXC1XN0-part2 showopts pciback.permissive
pciback.hide=(00:02.0)(00:02.1)(00:1d.0)(00:1d.1)(00:1d.2)(00:1d.7)(00:1a.0)(00:1a.1)(00:1a.7)(00:1b.0)
pci=resource_alignment=00:1a.7;00:1d.7 console=ttyS0
>     module /boot/initrd-2.6.31.12-0.2-xen
> 
Thanks, I updated the wiki:
http://wiki.xensource.com/xenwiki/XenPCIpassthrough
> > 
> >> Thanks, Pasi!
> >> 
> > 
> > No problems.. nice to hear it works.
> > What VGA adapter are you using btw? 
> 
> The machine is a Dell Optiplex 755, and I''m using the on-board
video adapter, an Intel Q35 Express.  lspci shows it as:
> 
> 00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express
Integrated Graphics Controller (rev 02)
> 00:02.1 Display controller: Intel Corporation 82Q35 Express Integrated
Graphics Controller (rev 02)
> 
Ok. Intel IGDs work easily.. I guess mainly because Intel developed the VGA
passthru code :)

Nvidia/ATI adapters are more troublesome.. and might require some custom patches
for FLR.

-- Pasi


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> 
> Thanks, I updated the wiki:
> http://wiki.xensource.com/xenwiki/XenPCIpassthrough
> 
Awesome - thanks!
 
> 
> Ok. Intel IGDs work easily.. I guess mainly because Intel developed the VGA
> passthru code :)
> 
> Nvidia/ATI adapters are more troublesome.. and might require some custom 
> patches for FLR.
> 
I plan to try some add-in adapters - probably ATI - here before too long, as I
want to see about the dual-monitor support with the graphics pass-through. 
I''ll have to see if I have any cards around that I can throw in and
try.

-Nick





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On Thu, Apr 08, 2010 at 03:52:15PM -0600, Nick Couchman
wrote:
> > 
> > Ok. Intel IGDs work easily.. I guess mainly because Intel developed
the VGA
> > passthru code :)
> > 
> > Nvidia/ATI adapters are more troublesome.. and might require some
custom
> > patches for FLR.
> > 
> 
> I plan to try some add-in adapters - probably ATI - here before too long,
as I want to see about the dual-monitor support with the graphics pass-through. 
I''ll have to see if I have any cards around that I can throw in and
try.
> 
I just added your IGD model info to:
http://wiki.xensource.com/xenwiki/XenVGAPassthrough

Feel free to tell how it goes with the ATI adapter. There has been extra patches
floating on the xen-devel list for some other troublesome adapters.

Although it might just work with ATI aswell, who knows :)

-- Pasi


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On Fri, Apr 09, 2010 at 12:58:15AM +0300, Pasi Kärkkäinen
wrote:
> On Thu, Apr 08, 2010 at 03:52:15PM -0600, Nick Couchman wrote:
> > > 
> > > Ok. Intel IGDs work easily.. I guess mainly because Intel
developed the VGA
> > > passthru code :)
> > > 
> > > Nvidia/ATI adapters are more troublesome.. and might require some
custom
> > > patches for FLR.
> > > 
> > 
> > I plan to try some add-in adapters - probably ATI - here before too
long, as I want to see about the dual-monitor support with the graphics
pass-through.  I''ll have to see if I have any cards around that I can
throw in and try.
> > 
> 
> I just added your IGD model info to:
> http://wiki.xensource.com/xenwiki/XenVGAPassthrough
> 
Btw did you passthru both of the PCI devices, or just one? 

-- Pasi
> Feel free to tell how it goes with the ATI adapter. There has been extra
patches
> floating on the xen-devel list for some other troublesome adapters.
> 
> Although it might just work with ATI aswell, who knows :)
> 
> -- Pasi
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
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> 
> Btw did you passthru both of the PCI devices, or just one? 
> 
> -- Pasi
> 
I tried it with both settings, but I didn''t install the native driver
until after I had passed through both devices.  Passing through the VGA one
(00:02.0) seemed to work fine, but, again, I didn''t try that with the
native Intel driver installed (yet).

-Nick



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> 
> I just added your IGD model info to:
> http://wiki.xensource.com/xenwiki/XenVGAPassthrough
> 
> Feel free to tell how it goes with the ATI adapter. There has been extra 
> patches
> floating on the xen-devel list for some other troublesome adapters.
> 
> Although it might just work with ATI aswell, who knows :)
> 
Well, the initial attempts with an Nvidia card aren''t quite so
successful - the domain tries to start, but stalls at some point - hard to tell
where.  I get messages in the qemu-dm log file that say that the real physical
device 01:00.0 (the PCI slot of the add-in video card) has been successfully
registered, but then it kind of stalls and doesn''t go any further than
that.  I need to make sure I have the actual 4.0 release and not one of the RCs
(I''m using some pre-built RPMs for openSuSE), so perhaps that will
help.

-Nick



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On Fri, Apr 09, 2010 at 09:45:03AM -0600, Nick Couchman
wrote:
> > 
> > I just added your IGD model info to:
> > http://wiki.xensource.com/xenwiki/XenVGAPassthrough
> > 
> > Feel free to tell how it goes with the ATI adapter. There has been
extra
> > patches
> > floating on the xen-devel list for some other troublesome adapters.
> > 
> > Although it might just work with ATI aswell, who knows :)
> > 
> 
> Well, the initial attempts with an Nvidia card aren''t quite so
successful - the domain tries to start, but stalls at some point - hard to tell
where.  I get messages in the qemu-dm log file that say that the real physical
device 01:00.0 (the PCI slot of the add-in video card) has been successfully
registered, but then it kind of stalls and doesn''t go any further than
that.  I need to make sure I have the actual 4.0 release and not one of the RCs
(I''m using some pre-built RPMs for openSuSE), so perhaps that will
help.
> 
Also keep in mind many Nvidia cards will require extra/custom patches.. 
See the XenVGAPassthrough wiki page for some links, and xen-devel archives for 
discussions and more patches..

I think some of the threads has instructions what you need to do with Nvidia
to get it working.

Please let us know how it goes..

-- Pasi


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On Thu, Apr 08, 2010 at 04:06:27PM -0600, Nick Couchman
wrote:
> > 
> > Btw did you passthru both of the PCI devices, or just one? 
> > 
> > -- Pasi
> > 
> 
> I tried it with both settings, but I didn''t install the native
driver until after I had passed through both devices.  Passing through the VGA
one (00:02.0) seemed to work fine, but, again, I didn''t try that with
the native Intel driver installed (yet).
> 
Btw what was the guest OS and driver? 

-- Pasi


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> Btw what was the guest OS and driver? 
Windows XP is the guest O/S - the driver I''m currently using is the
Dell-provided Intel Graphics Adapter driver.

For the Nvidia card, I did not get as far as installing a driver - the domU
simply would not start with the add-in graphics card specified as a pass-through
device.

-Nick




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