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.jack...@eu.citrix.com>
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