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

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Mon, Jun 19, 2017 at 12:01:32PM +0100, Julien Grall wrote:
> 
> 
> 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.
> 

Is there a summary of the problem, is there a particular email in this
thread I should look at? Sorry I'm swamped by emails and patches at the
moment.

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