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

[Julien Grall <julien@xen.org>]

On 19/05/2020 04:08, Tamas K Lengyel wrote:
> On Mon, May 18, 2020 at 5:32 AM Julien Grall <julien@xen.org> wrote:
>>
>> From: Julien Grall <jgrall@amazon.com>
>>
>> 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