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 Re: [Xen-users] CentOS/Xen PCI pass-through
 
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Hi Guys,   I have been trying to get PCI Passthrough working 
for *MONTHS* now.       In the bottom half are the best instructions I've 
seen so far for getting PCI Passthrough to work yet.  It not only explains 
it better than most places, but it allows you to see and understand what is 
actually going on during the process.  I now have successfully passed 
through a network card and a video card to a DomU machine.  (I've yet to 
get the video card to actually work, but it's in the PCI list now)   Hope this helps, Phil. 
  ----- Original Message -----  Sent: Monday, April 21, 2008 4:33 
AM Subject: [Xen-users] CentOS/Xen PCI 
  pass-through Is PCI pass-through available in the "standard" CentOS 5.1 
  kernel?  From the "xm info" command, I see the major.minor version of Xen 
  is 3.1, so I'm assuming it is and that I'm missing something 
  basic.
 
 I've tried using "pciback.hide=(...)" in grub.conf, but after 
  getting an error message about it not being valid, I realized that pciback is 
  a module, so it's not available.
 
 So, I tried it in /etc/modprobe.conf, 
  but that apparently didn't work either.  I also tried this (http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_module?highlight=%28pci%29) 
  and it seemed to work -- I at least got a message about the pciback grabbing 
  the device.  I do, however, still see the device when I do a "lspci", but 
  I'm not certain if that is normal or not.
 
 I added the "pci = [ ... ]" 
  in my Xen domU config file but am not seeing the device in lspci (which is 
  totally empty), and am not sure what is up.  Since I don't have the "xm" 
  commands in the domU, I'm not sure what to do.
 
 I'd like to pass in my 
  video capture devices into a domU and get Myth or Sage running in one of my 
  domU's.  Base OS is CentOS 5.1 x86_64 for sheer stability and 
  patchability; that way the domU can be tweaked/upgraded/rebuilt without 
  impacting anything else.
 
 Any suggestions would be 
  appreciated!
 -Rob
 
 
   
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