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

On 03/12/2019 14:38, Andre Przywara wrote:
On Tue, 3 Dec 2019 11:39:58 +0000
Julien Grall <julien@xxxxxxx> wrote:




@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.


Julien Grall

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