Re: [Xen-devel] [PATCH 4/6] arm: add a small kconfig for Renesas RCar H3

[Julien Grall <julien.grall@xxxxxxx>]

On 04/24/2018 10:52 AM, Andrii Anisov wrote:
> Hello Julien,
Hi Andrii,

> On 24.04.18 12:01, Julien Grall wrote:
> > You can't unselect HAS_PASSTHROUGH support. Given that you are going 
> > to have passthrough in the future, I don't much see the point to try 
> > to allow that option to be disabled.
> If we are speaking of R-Car Gen3, you might be right. We are targeting 
> IPMMU support upstreamed. What about IOMMU-less platforms?
For everything you disable, you double the number of configuration 
possible. So we have to weight the benefits of disabling some code.
I believe that passthrough should be kept as core Xen, it is small and 
quite tight to the rest of Xen.
But I would be interested to know what would be the rationale to disable 
that. Do you foresee certification on IOMMU-less platform?
Cheers,

--
Julien Grall

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