Re: [Xen-devel] [PATCH][v3] PV featured HVM(hybrid) support in Xen

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 08/02/2010 08:31, "Sheng Yang" <sheng@xxxxxxxxxxxxxxx> wrote:

>> Why can't you leave LAPIC available for things like INIT-SIPI-SIPI, and
>> simply not use it for things you need higher perf for?
> 
> I am not quite understand why we need to stick to INIT-SIPI-SIPI. For the
> physical cpus, we can't tell their state directly, so we need a protocol, like
> INIT-SIPI-SIPI; but for virtual cpus, we have hypercall as our protocol, so we
> can easily tell them when and where to start, which is much more directly like
> PV domU did.

Fine, I guess.

 -- Keir



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