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Re: [Xen-devel] [PATCH v2.1 15/17] tools/libx[cl]: Plumb 'missing' through static_data_done() up into libxl



Andrew Cooper writes ("[PATCH v2.1 15/17] tools/libx[cl]: Plumb 'missing' 
through static_data_done() up into libxl"):
> Pre Xen-4.14 streams will not contain any CPUID/MSR information.  There is
> nothing libxc can do about this, and will have to rely on the higher level
> toolstack to provide backwards compatibility.
> 
> To facilitate this, extend the static_data_done() callback, highlighting the
> missing information, and modify libxl to use it.  At the libxc level, this
> requires an arch-specific hook which, for now, always reports CPUID and MSR as
> missing.  This will be adjusted in a later change.
> 
> No overall functional change - this is just plumbing.

Thanks for the additional explanation and the explanation on IRC.
I'm now convinced that this is the best way to do it.

Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

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