Re: [Xen-devel] [PATCH 06/14 v4] xen/arm: vpl011: Add a new domctl API to initialize vpl011

[Julien Grall <julien.grall@xxxxxxx>]

On 19/06/17 11:59, Bhupinder Thakur wrote:
> Hi Julien,
>
> I was mistaken in my earlier mail about vpl011 init working if it is
> moved to libxl__arch_domain_create(). It is failing because as you
> have mentioned vuart_pfn is allocated later in xc_dom_build_image().
>
> Can we delay mapping of this page in Xen until the ring buffer is
> actually required by the emulation code for reading/writing data. By
> that time, the page would have been physically mapped.
You would not be able to report an error if you fail to map it. But this 
looks like to me a workaround for a tool problem.
Anyway, as I said, I'd like feedback from the tools maintainers to see 
how we can proceed.
Cheers,

--
Julien Grall

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