Re: [Xen-devel] [PATCH] xen/arm: Basic support for sunxi/sun50i h6 platform.

[Julien Grall <julien@xxxxxxx>]

On 03/12/2019 14:38, Andre Przywara wrote:
> On Tue, 3 Dec 2019 11:39:58 +0000
> Julien Grall <julien@xxxxxxx> wrote:
>
> Hi,
>
> > (+Andre)
> >
> > Hi,
> >
> > @Andre, IIRC you originally added the support for sunxi in Xen. Could
> > you have a look at this patch?
> Looks alright, and indeed the H6 needs it. Even though Allwinner totally 
> re-arranged the memory map, they missed the opportunity to put each device at 
> least in their own 4K page.
>
> Reviewed-by: Andre Przywara <andre.przywara@xxxxxxx>
Thank you for the review!

> If you can wait till this evening, I can even test it.
I can wait until tomorrow before comitting the patch.

> It's actually a shame that we need this enumeration, when all we are after is an answer to the question: Does a device used by Xen share a 4K page with a device handed off to Dom0? It sounds 
like a nice rainy afternoon exercise to scan the DT to find those 
devices automatically and mask them (on the A64 for instance UART4 is on 
a different page).
I agree and I think we discussed about it before :). I would welcome 
such improvement in Xen, this would actually allow us to drop sunxi.c 
completely.
Cheers,

--
Julien Grall

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