Re: [Xen-devel] PCI Passthrough Problems/Questions

["Nick Couchman" <Nick.Couchman@xxxxxxxxx>]

> Nick,
> 
> I think the issue is 02:00.0 was mapped twice. Could you try with below 
> patch? Then post the xen log. Pls post all output of 'lspci -v' on your 
> system.
> 

I applied the patch, with one minor change.  The line:

dprintk(XENLOG_ERR VTDPREFIX, "context_present: %x:%x.%x:pdev->domain=%d
domain=%d\n", bus, PCI_SLOT(devfn), PCI_FUNC(devfn), pdev->domain,
domain->domain_id);

should be:

dprintk(XENLOG_ERR VTDPREFIX, "context_present: %x:%x.%x:pdev->domain=%d
domain=%d\n", bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
pdev->domain->domain_id, domain->domain_id);

(notice the pdev->domain->domain_id instead of pdev->domain).

The domU no longer generates the error about failing to assign device to
IOMMU, but now it just silently crashes.  xm dmesg output:

(XEN) [VT-D]iommu.c:1511: d0:PCI: unmap bdf = 2:0.0
(XEN) [VT-D]iommu.c:1340: bus: 2, devfn: 0[VT-D]iommu.c:1368: d1:PCI:
map bdf = 2:0.0
(XEN) [VT-D]iommu.c:1371: domain_conext_mapping_one ret: 0
(XEN) [VT-D]iommu.c:1378: Upstream bridge for 1:0 is 2.
(XEN) [VT-D]iommu.c:1383: d1:PCI: map PCIe2PCI bdf = 1:0.0
(XEN) [VT-D]iommu.c:1394: d1:PCI: map secbus (2) with devfn 0
(XEN) [VT-D]iommu.c:1249: context_present: 2:0.0:pdev->domain=0 domain=1
(XEN) [VT-D]iommu.c:1415: Return value: 0
(XEN) [VT-D]io.c:300: d1: bind: m_gsi=16 g_gsi=36 device=5 intx=0
(XEN) [VT-D]iommu.c:1511: d0:PCI: unmap bdf = 2:0.1
(XEN) [VT-D]iommu.c:1340: bus: 2, devfn: 1[VT-D]iommu.c:1368: d1:PCI:
map bdf = 2:0.1
(XEN) [VT-D]iommu.c:1371: domain_conext_mapping_one ret: 0
(XEN) [VT-D]iommu.c:1378: Upstream bridge for 1:0 is 2.
(XEN) [VT-D]iommu.c:1383: d1:PCI: map PCIe2PCI bdf = 1:0.0
(XEN) [VT-D]iommu.c:1394: d1:PCI: map secbus (2) with devfn 0
(XEN) [VT-D]iommu.c:1415: Return value: 0
(XEN) [VT-D]io.c:300: d1: bind: m_gsi=16 g_gsi=40 device=6 intx=0
(XEN) [VT-D]iommu.c:1511: d1:PCI: unmap bdf = 2:0.1
(XEN) [VT-D]iommu.c:1340: bus: 2, devfn: 1[VT-D]iommu.c:1368: d0:PCI:
map bdf = 2:0.1
(XEN) [VT-D]iommu.c:1371: domain_conext_mapping_one ret: 0
(XEN) [VT-D]iommu.c:1378: Upstream bridge for 1:0 is 2.
(XEN) [VT-D]iommu.c:1383: d0:PCI: map PCIe2PCI bdf = 1:0.0
(XEN) [VT-D]iommu.c:1394: d0:PCI: map secbus (2) with devfn 0
(XEN) [VT-D]iommu.c:1415: Return value: 0
(XEN) [VT-D]iommu.c:1511: d1:PCI: unmap bdf = 2:0.0
(XEN) [VT-D]iommu.c:1340: bus: 2, devfn: 0[VT-D]iommu.c:1368: d0:PCI:
map bdf = 2:0.0
(XEN) [VT-D]iommu.c:1371: domain_conext_mapping_one ret: 0
(XEN) [VT-D]iommu.c:1378: Upstream bridge for 1:0 is 2.
(XEN) [VT-D]iommu.c:1383: d0:PCI: map PCIe2PCI bdf = 1:0.0
(XEN) [VT-D]iommu.c:1394: d0:PCI: map secbus (2) with devfn 0
(XEN) [VT-D]iommu.c:1249: context_present: 2:0.0:pdev->domain=1 domain=0
(XEN) [VT-D]iommu.c:1415: Return value: 0

And from xend.log I've pasted into this pastebin:

http://pastebin.com/b4bwdBPq

I have some extra dprintk calls that I threw in there, so there may be a
little more output than with the patch you sent.

-Nick



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