[Xen-devel] Re: [PATCH 30 of 38] xen: implement io_apic_ops

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Ingo Molnar wrote:
> it certainly looks thin enough to me although i'm really not sure we 
> want to virtualize at the IO-APIC level. Peter, what's your 
> opinion/preference?
>   
Given that Xen's requirements here are pretty Xen-specific (I don't 
imagine that any other virtualization system would work in the same 
way), I didn't bother trying to come up with a general "virtualization" 
layer at this level - that's why I was pretty blunt about putting xen_* 
calls in without any indirection.  But the code could certainly be 
restructured in a way which would make it simpler to hook Xen as a 
side-effect, so long as it was achieving some other goal as well 
(general cleanup, big iron architecture support, better msi handling, 
whatever...).
   J

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