Re: [Xen-devel] XCI: can we get to the demo state?

[Tom Rotenberg <tom.rotenberg@xxxxxxxxx>]

I think that the "hanging" problem happens, when you try to
pass-through, both the 00:02.0, and the 00:02.1 (at-least that's what
happened to me in the past), so i guess that because you are just
passing through 00:02.0, you don't get this problem...

Can you try to pass-through 00:02.1 also, and see if it happens to you?

On Sat, Aug 15, 2009 at 12:15 AM, Ross
Philipson<Ross.Philipson@xxxxxxxxxx> wrote:
> Yes, I am passing the graphics through. I am using an HP 6930p at the
> moment. I am using Windows Vista as the VM I am passing the graphics through
> to and using Windows XP in a second VM that I am using VNC for. I attached
> the xenvm config files I happen to be using right now. Note that my Vista
> install is not a vhd but rather installed on a partition on disk.
>
>
>
> Ross
>
>
>
> From: Phung Te Ha [mailto:phungte@xxxxxxxxx]
> Sent: Friday, August 14, 2009 4:18 PM
>
> To: Ross Philipson
> Cc: Vincent Hanquez; xen-devel@xxxxxxxxxxxxxxxxxxx; Kamala Narasimhan
> Subject: Re: [Xen-devel] XCI: can we get to the demo state?
>
>
>
> Do you pass the graphics controller through? Which guest are you using? Do
> you mind publish your config file?
>
> Thank you.
>
> Phung-Te
>
> On Fri, Aug 14, 2009 at 11:08 AM, Ross Philipson <Ross.Philipson@xxxxxxxxxx>
> wrote:
>
> Well we don’t have a official list we can push but we run on the same HP
> 6930p you have all the time. We have also had it running on Intel Q35
> systems. So in general it should work on these systems.
>
>
>
> Thanks
>
> Ross
>
>
>
> From: Phung Te Ha [mailto:phungte@xxxxxxxxx]
> Sent: Friday, August 14, 2009 11:32 AM
> To: Ross Philipson
> Cc: Vincent Hanquez; xen-devel@xxxxxxxxxxxxxxxxxxx; Kamala Narasimhan
>
> Subject: Re: [Xen-devel] XCI: can we get to the demo state?
>
>
>
> Hello all,
>
> The only thing I passed through was the graphics controller.
> After starting the guest, the system is still there running, xenops
> list_domains shows 2 doms running, but nothing from the guest is showing.
>
> The board I am using is the Intel DQ35OJ and the graphics controller is the
> onboard one. Same operation has also been done on a HP6930p, same result.
> Can you publish the list of hardware you guys are using, MB, graphics
> board..., the config that most likely to get a graphics controller passed
> through.
>
> Thank you.
>
> Phung-Te
>
> On Fri, Aug 14, 2009 at 7:13 AM, Ross Philipson <Ross.Philipson@xxxxxxxxxx>
> wrote:
>
> Yeah, these occur when the iommu context for the device in question (in this
> case your iGfx card) has been torn down but the card is still active (still
> attempting DMA). The code in xen to perform an function level resets (FLR)
> on the devices takes care of the vast majority of these but there still
> remain one or two that occur even thought the FLR has been done. This issue
> was never resolved but these few remaining faults don't seem to cause a
> problem. So you are experiencing a hang as the vm starts I take it. Is the
> vtd fault trace the last thing you see? Are you passing anything else
> through?
>
> Thanks
> Ross
>
> -----Original Message-----
> From: Vincent Hanquez
> Sent: Friday, August 14, 2009 7:05 AM
> To: Phung Te Ha
>
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Ross Philipson; Kamala Narasimhan
> Subject: Re: [Xen-devel] XCI: can we get to the demo state?
>
> Phung Te Ha wrote:
>> Hi Vincent,
>>
>> I tried your suggestion, adding pci = 0,bind,0000:00:02.0 in the config
>> on 2 different machines, the HP6930 and on an Intel MB DQ35OJ.
>>
>> On both machines, I got the samething, the guest run as shown by
>> xenops list_domains:
>>
>>  id |  state |    cpu_time |                                 uuid
>>  0 |     R  | 54203470658 | 00000000-0000-0000-0000-000000000000
>>  1 |    B H | 12214238864 | 00000000-0000-0000-0000-000000000002
>>
>> But nothing shows on the screen.
>>
>> I checked the logs and found in xenops dmesg:
>>
>> ...
>> (XEN) Intel VT-d Snoop Control not supported.
>> (XEN) Intel VT-d DMA Passthrough not supported.
>> (XEN) Intel VT-d Queued Invalidation not supported.
>> (XEN) Intel VT-d Interrupt Remapping not supported.
>> (XEN) I/O virtualisation enabled
>> (XEN) I/O virtualisation for PV guests disabled
>>
>>
>> And when the guest is started:
>>
>> ...
>>  _fault:DMA Write: 0:2.0 addr faddf7000 REASON 5 iommu->reg =
>> ffff828bfff56000
>> (XEN) print_vtd_entries: iommu = ffff83007dcfb320 bdf = 0:2:0 gmfn =
>> faddf7
>> (XEN)     root_entry = ffff83007e0ce000
>> (XEN)     root_entry[0] = 7e066001
>> (XEN)     context = ffff83007e066000
>> (XEN)     context[10] = 201_7da02001
>> (XEN)     l3 = ffff83007da02000
>> (XEN)     l3_index = 3e
>> (XEN)     l3[3e] = 0
>> (XEN)     l3[3e] not present
>> (XEN) [VT-D]iommu.c:722: iommu_page_fault: iommu->reg = ffff828bfff56000
>> (XEN) [VT-D]iommu.c:691: iommu_fault_status: Fault Overflow
>> (XEN) [VT-D]iommu.c:694: iommu_fault_status: Primary Pending Fault
>> (XEN) [VT-D]iommu.c:676: iommu_fault:DMA Write: 0:2.0 addr faddf7000
>> REASON 5 iommu->reg = ffff828bfff56000
>> (XEN) print_vtd_entries: iommu = ffff83007dcfb320 bdf = 0:2:0 gmfn =
>> faddf7
>> (XEN)     root_entry = ffff83007e0ce000
>> (XEN)     root_entry[0] = 7e066001
>> (XEN)     context = ffff83007e066000
>> ...
>>
>> Do you think these 2 machines have enough of VT-d features to get the
>> graphics passed-through?
>> Do you have a preferred desktop board, known to work for graphisc
>> passed-through?
> I'm not really familiar with thoses VT-d errors. Kamala/Ross do you have
> any idea, what this previous errors means ?
>
> thanks,
> --
> Vincent
>
>
>
>
>
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