Re: [Xen-devel] [PATCH v2 3/4] xen/arm: clean and invalidate all guest caches by VMID after domain build.

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Ian Campbell writes ("Re: [PATCH v2 3/4] xen/arm: clean and invalidate all 
guest caches by VMID after domain build."):
> On Tue, 2014-02-04 at 15:55 +0000, Ian Jackson wrote:
> > What I mean is that they might map the guest pages, and expect to
> > exchange data with the guest through the pages while they were still
> > mapped ...
> > 
> > > Also after the initial start of day period we require that the guest
> > > enable its caches.
> > 
> > ... but before the guest enables caching.
> 
> We basically rule that out in the ABI requirements.
> 
> The cases where this would happen are things like xenstore and
> xenconsole but those are driven from the guest end, which requires the
> caches to be on.

OK, good.  Thanks for the explanation.

Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

Ian.

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