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xen-devel
Re: [Xen-devel] Re: Xen/ia64 status (and solicitation for alpha testers
> All the privilege-sensitive (and reads of write-privilege-sensitive
> registers) also need to trap and be emulated. I force this to
> happen by finding and translating all such instructions to other
> unique illegal/privilged bit patterns that trap.
OK that's what was guessing from code in Xen. It's quite nice that this is
workable, in fact!
> This is all slow but, as with x86, paravirtualization will greatly
> reduce the number of privops emulated and bring performance to
> within a couple percent of native (as demonstrated in our VM'04
> paper on vBlades).
Out of interest, what are the modifications likely to look like in terms of
the source tree? Will it be necessary to introduce a new (sub?) architecture
to Linux in order to incorporate them?
Also, do you / will you support legacy IA-32 code?
Sorry for all the questions. Xen on IA-64 looks very cool stuff!
Cheers,
Mark
>
> Hope that helps!
> Dan
>
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