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

[Julien Grall <julien@xxxxxxx>]

On 19/05/2020 04:08, Tamas K Lengyel wrote:
> 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,
Hi,

> could you post a git branch somewhere? I can try this on my rpi4 that
> already runs 4.13.
I have pushed a branch based on unstable and the v2 of the series:

git://xenbits.xen.org/people/julieng/xen-unstable.git

branch arm-dma/v2

Thank you in advance for the testing!

Cheers,

--
Julien Grall