Re: [Xen-devel] [PATCH 13 of 14 V3] libxl: bind virtual bdf to physical bdf after device assignment

[Wei Wang2 <wei.wang2@xxxxxxx>]

On Tuesday 10 January 2012 18:13:35 Ian Jackson wrote:
> Wei Wang writes ("[PATCH 13 of 14 V3] libxl: bind virtual bdf to physical 
bdf after device assignment"):
> > libxl: bind virtual bdf to physical bdf after device assignment
>
> I confess I don't understand at all why this is needed.
>
> Ian.

Oh, the idea of this hypercall is used to allow hypervisor to trace the 
virtual bdf of a physical bdf.  IOMMU emulator reads iommu ppr log from host 
buffer and dispatch them into guest log buffer. In the host log entry, 
physical bdf is written by iommu and needs to be changed to virtual bdf when 
write back to a guest. It might also be done if we could extend the interface 
of xc_assign_device?

Thanks,
Wei




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