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

[Tamas K Lengyel <tamas.k.lengyel@xxxxxxxxx>]

On Mon, May 18, 2020 at 5:32 AM Julien Grall <julien@xxxxxxx> 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.

Hi Julien,
could you post a git branch somewhere? I can try this on my rpi4 that
already runs 4.13.

Thanks,
Tamas