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

[Phung Te Ha <phungte@xxxxxxxxx>]

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?

Thank you very much.

Phung-Te



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