Re: [Xen-devel] Notes on stubdoms and latency on ARM

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Thu, 2017-06-01 at 12:52 +0200, George Dunlap wrote:
> > On May 31, 2017, at 6:45 PM, Stefano Stabellini <sstabellini@kernel
> > .org> wrote:
> > 
> > I don't think we should provide that. If the user wants a stable
> > interface, she can use domains. I suggested that the code for the
> > EL0
> > app should come out of the Xen repository directly. Like for the
> > Xen
> > tools, they would be expected to be always in-sync.
> 
> Hmm, it sounds like perhaps I misunderstood you and Volodymyr.  I
> took “you just call function `handle_mmio()` right in the app” to
> mean that the *app* calls the *hypervisor* function named
> “handle_mmio”.
>
Right. That what I had understood too.

> It sounds like what he (or at least you) actually meant was that the
> *hypervisor* calls the function named “handle_mmio” in the *app*?
> 
Mmm... it's clearly me that am being dense, but what do you exactly
mean with "the hypervisor calls the function named handle_mmio() in the
app"? In particular the "in the app" part, and how is the hypervisor
going to be "in" the app...

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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