Re: [PATCH for-4.19 v2] docs/arm: Document where Xen should be loaded in memory

[Julien Grall <julien@xxxxxxx>]

Hi Stefano,

On 24/10/2023 20:52, Stefano Stabellini wrote:
> On Tue, 24 Oct 2023, Bertrand Marquis wrote:
> > Hi Julien,
> >
> > > On 24 Oct 2023, at 12:28, Julien Grall <julien@xxxxxxx> wrote:
> > >
> > > From: Julien Grall <jgrall@xxxxxxxxxx>
> > >
> > > In commit 9d267c049d92 ("xen/arm64: Rework the memory layout"),
> > > we decided to require Xen to be loaded below 2 TiB to simplify
> > > the logic to enable the MMU. The limit was decided based on
> > > how known platform boot plus some slack.
> > >
> > > We had a recent report that this is not sufficient on the AVA
> > > platform with a old firmware [1]. But the restriction is not
> > > going to change in Xen 4.18. So document the limit clearly
> > > in docs/misc/arm/booting.txt.
> > >
> > > [1] https://lore.kernel.org/20231013122658.1270506-3-leo.yan@xxxxxxxxxx
> > >
> > > Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
> > > Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
> > Reviewed-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
> Added for for-4.19
It was actually meant for 4.18 as we didn't want to include the patch to 
increase the reserved area for the identity mapping [1]. But I failed to 
use the proper tag.
Henry provided a release-ack and the patch is now committed.

Cheers,

[1]  https://lore.kernel.org/20231013122658.1270506-3-leo.yan@xxxxxxxxxx

--
Julien Grall