Re: VGA passthrough on unstable

[Javier <javiapple@hotmail.com>]

Hi all,
Im trying to get VGA passthrough working for Nvidia GTX460 (like u), but i
can't apply any patches without errors... im following these steps:
"http://lists.xensource.com/archives/html/xen-devel/2010-05/msg00441.html"
and using those patches, but I am only able to apply the first and the third
patch succesfully while the others seems to not fit with the actual version
of xen-unstable code 
(Some Hunks say succeed and some say failed, for example the 4th patch
(hvmloader.patch) returns
   # patch -p0 < hvmloader.patch
  patching file tools/firmware/hvmloader/hvmloader.c
  Hunk #1 succeeded at 114 with fuzz 2 (offset -1 lines).
  Hunk #2 FAILED at 220.
  Hunk #3 succeeded at 436 (offset -257 lines).
  1 out of 3 hunks FAILED -- saving rejects to file
tools/firmware/hvmloader/hvmloader.c.rej

the path "makefile" neither works.. )
 
Also i have tried to use the patches that Mr Teo En Ming attach at the end
of this post
"http://lists.xensource.com/archives/html/xen-devel/2009-08/msg01176.html"
but I've got similarly errors..

Could you post how do you proceed to make this patches work? Did u make your
own patches?
I really need to make this work.. 

Thank you for your time.



Pasi Kärkkäinen wrote:
> 
> On Thu, May 05, 2011 at 07:33:46PM +0800, Liwei wrote:
>> (Pardon me if I broke any rules or this post doesn't belong to this list)
>> 
>> I forward patched yesterday's copy of the unstable repo in an attempt to
>> get VGA passthrough working for a Nvidia GTX460 on a HVM DomU.
>> (Surprisingly, it wasn't hard at all to get the patches in - getting
>> them to work is another ongoing story)
>> 
>> The patches were based on this post:
>> http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>> 
>> I dumped the card's BIOS using nvtool as per the post's instructions.
>> The only major change was that the BIOS ROM setup code was shifted
>> into its own file and some adjustment was needed for that. I'll create
>> a new patchset once I get this fully working. I also hope to push this
>> into being accepted by the devs for future releases by allowing the
>> user to configure this option and provide his own BIOS dump (instead
>> of hardcoding everything).
>> 
> 
> Being able to specify which vgabios file to load would be great..
> Feel free to send patches!
> 
> 
>> My card doesn't seem to support FLR, since xend complains about being
>> unable to reset the device.
>> 
>> With or without the
>> qemu-claim-cycle-for-secondary-gfx-passthrough.patch, the secondary
>> graphics card does not show anything at all (maybe because it is
>> behind a PCI-E bridge?), and xl list seems to show the guest consuming
>> all CPU resources.
>> 
>> However, using the primary graphics card, again with or without the
>> secondary passthrough patch, it actually managed to partially work
>> booting up the Windows 7 install. It manages to reach the pulsating
>> windows logo before BSOD-ing with 0x0000000A (IRQ_NOT_LESS_OR_EQUAL).
>> Meanwhile, the logs show a lot of:
>> 
>>    pt_pci_read_config: Error: Failed to read register with invalid
>> access size alignment. [00:05.0][Offset:0eh][Length:4]
>>    pt_pci_read_config: Error: Failed to read register with invalid
>> access size alignment. [00:06.0][Offset:0eh][Length:4]
>> 
> 
> Hmm.. 
> 
> So did you apply the vBar == pBar patches ?
> Did you modify them to fit your hardware? 
> 
> -- Pasi
> 
> 
>> Reduced the amount of allocated memory to 4096MB will introduce video
>> corruption in the pulsating logo, followed by the same BSOD.
>> 
>> Reducing the amount of allocated memory to below 2048MB or 1024MB will
>> cause a 0x000000A5 BSOD (BIOS ACPI not compliant).
>> 
>> Attempting to boot the same setup (with 8192MB of memory) with vCPU
>> set to 8 produced slightly different behaviour. Qemu seems to crash
>> and reboot a few seconds after the pulsating windows logo appears
>> (earlier than before the BSOD appeared before). At this point, it
>> should be noted that the 8 vCPU and 8192MB configuration worked with
>> 4.0. I couldn't test it in the patched unstable because VNC will only
>> produce a white screen (wrong VGA BIOS executed?).
>> 
>> Attempting to boot Ubuntu also produced similar results, except the
>> log now shows errors similar to (I did not copy out the log before
>> they were overwritten):
>> 
>>    Error: Failed to write register with invalid access size
>> 
>> The boot up seems to fail at trying to read from the emulated SATA
>> drive though, something about interrupt lost, and keeps on trying
>> again and again forever.
>> 
>> With the above tests, I also unscientifically fiddled around with the
>> pci_power_mgmt, pci_msitranslate, hap, hpet, pae, apic, acpi and
>> viridian toggleable settings.
>> 
>> I made no functional changes to the patches however, so maybe there
>> was something that I had to change in order to customise it for my
>> card. It'd be great if someone points that out to me if it is true.
>> 
>> I cannot use my USB keyboard and mouse at all in all my tests with
>> unstable, USB controller is passed in. USB works on 4.0 in the windows
>> installer, but I haven't tested them before the installer boots, so it
>> may be possible that passthrough is broken with my setup (does the
>> BIOS initialise USB peripherals for use during boot?).
>> 
>> So how should I proceed on from here?
>> 
>> Setup details as follows:
>> 
>> EVGA P55 Classified
>> Intel i7 860
>> 8GB Memory
>> 2x Palit Nvidia GTX460 (Primary and secondary)
>> 
>> Debian Squeeze
>> Dom0 is 2.6.32+29 (From repo)
>> 
>> PCI devices (Only those bound to xen_pciback are listed):
>> (It should be noted that except for the primary GFX, all other devices
>> are behind a NF200 PCI-E bridge)
>> 0b:00.0 - Secondary GFX
>> 0b:00.1 - Secondary GFX audio
>> 01:00.0 - Primary GFX
>> 01:00.1 - Primary GFX audio
>> 0e:00.0 - Multiport network card
>> 04:00.0 - Singleport network card
>> 00:1a.0 - USB2 root
>> 00:1b.0 - HD audio device
>> 00:1d.0 - USB2 root
>> 
>> PCI devices combinations tested (in each case, the audio is
>> passthroughed with the GFX):
>> (OT: Why doesn't multi-device BDF binding work on xen_pciback?)
>> Primary GFX only
>> Secondary GFX only
>> Primary GFX + Secondary GFX
>> Primary GFX + others
>> Secondary GFX + others
>> Primary GFX + Secondary GFX + others
>> 
>> Attached: Log files produced by xend and qemu and config files
>> (Sorry that only one set of logs are available, wasn't thinking
>> properly when executing rm *.log)
> 
> 
> 
> 
> 
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> 
> 
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