Re: [PATCH v2 for-4.14 0/3] Remove the 1GB limitation on Rasberry Pi 4

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 19 May 2020, Julien Grall wrote:
> From: Julien Grall <jgrall@xxxxxxxxxx>
> 
> Hi all,
> 
> At the moment, a user who wants to boot Xen on the Raspberry Pi 4 can
> only use the first GB of memory.
> 
> This is because several devices cannot DMA above 1GB but Xen doesn't
> necessarily allocate memory for Dom0 below 1GB.
> 
> This small series is trying to address the problem by allowing a
> platform to restrict where Dom0 banks are allocated.
> 
> This is also a candidate for Xen 4.14. Without it, a user will not be
> able to use all the RAM on the Raspberry Pi 4.
> 
> This series has only be slighlty tested. I would appreciate more test on
> the Rasbperry Pi 4 to confirm this removing the restriction.

You can add my reviewed-by to all patches in the series.