Re: [PATCH 30 of 38] xen: implement io_apic_ops

From: Jeremy Fitzhardinge
Date: Thu Nov 20 2008 - 14:38:20 EST


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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