Re: [Xen-users] i7 and vt-d

[Christoph Kaminski <mangel@xxxxxx>]

Yep it works but I have some strange msgs in xm dmesg:

(XEN) I/O virtualisation enabled
(XEN) I/O virtualisation for PV guests disabled
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid
(XEN) [VT-D]iommu.c:1269:d32767 domain_context_mapping:invalid

What does it mean?

Greetz

Guido Hecken schrieb:
> Try kernel-parameter iommu=1 in your dom0 boot-script.
> something like this:
>
> kernel /xen-3.3.1.gz console=vga dom0_mem=512M iommu=1
> In older xen-versions vtd=1 did the same.
> This option seems to be not so well documented...
> It took me some hours to find and hopefully understand them.
>
> Good luck,
>
> Guido
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