Re: [Xen-devel] Dealing with non-existent BDF devices in VT-d and in the hardware.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.03.14 at 18:30, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> To use this hack, apply the 
> 0001-xen-pci-Introduce-a-way-to-deal-with-buggy-hardware-.patch
> to your hypervisor, compile and install.

I'm still rather hesitant to consider such a pretty involved
workaround for general inclusion. Did you investigate whether
leveraging the grouping functionality (iommu_get_device_group())
might be possible instead? We're talking about a legacy PCI bridge
after all, and if done that way also covering the AMD IOMMU case
might be more straightforward (after all that case is missing from
your already large patch).

While looking over this, I found that this only has a use in xend -
another xl deficiency? And only for checking purposes, rather
than to enforce the assignment of all (non-bridge?) devices in
the group...

Jan


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