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Re: [vfio-users] Troubleshooting PCI Pass-through



But what if  seabios is used instead of OVMF ?
--------------------------------------------
On Sun, 8/14/16, Nicolas Roy-Renaud <nicolas roy-renaud 1 ens etsmtl ca> wrote:

 Subject: Re: [vfio-users] Troubleshooting PCI Pass-through
 To: "gerson moises" <grsnmoises yahoo com>
 Cc: vfio-users redhat com
 Date: Sunday, August 14, 2016, 10:21 AM
 
 
     Make sure to quote what's already been said next
 time. Makes it
       more conveinient to follow. 
 
       
         It's pretty well guaranteed that a 500
 series GeForce does not support
 UEFI.  AFAIK, there's not a terribly high success rate
 with these cards
 either.  The 600 series are generally what I consider the
 bottom end of
 working reasonably well.  Otherwise there's not really
 enough
 information in your report to provide any specific advice. 
 Thanks,
 
 Alex
 
       
       I don't think there's much to report,
 unfortunately.
     The problem is that VFIO passthroughs are made
 possible by a
       number of features and protocols introduced in the
 UEFI spec,
       which wasn't really needed on GPUs or anywhere
 back in 2010, when
       the GTX 500 series was released. When Windows 8
 introduced secure
       boot, UEFI support accross the board became a
 requirement for most
       OEM PCs, so the vast majority of the hardware relased
 after that
       point supports it. Since secure boot had been making
 the news for
       a few months before that, I'm guessing the
 hardware manufacturers
       had also been given the heads up, so a number of 600
 series card
       probably support it as well, like Alex said. Don't
 quote me on
       that, though, I'm looking things up as I go.
     If you really want to be sure on whether or not your
 GPU is UEFI
       compatible and you've already tried looking up the
 exact model on
       TechPowerup's
         database (it's not perfect, everything
 listed for my card
       says it's not EFI compatible), see if you can boot
 on a version of
       windows with EFI support (Windows 7+). If GPU-Z
       detects your BIOS as UEFI
         compatible, then you're in luck, but I
 wouldn't count on it.
 
     
     The point is, that card most probably won't work
 as a guest card.
       You could use it on the host, but you'd have to
 get a new card for
       the actual passthrough.
     -Nicolas
 
     
 
     On 2016-08-12 15:14,
 gerson moises
       wrote:
 
     
     
       Dear Mr. Alex WIlliamson,
 
 I have asked before about problems using Ubuntu and Windows
 as guests for PCI Pass-through.
 As Mr. Alex said, the success rate of GTX 570 cards is not
 high. However, I would like to know how can I make a
 detailed troubleshooting in this case for report purposes, I
 mean is there a way I can find the cause of the problem by
 checking KVM or kernel logs ? I am still a beginner in this
 area.
 
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