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

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 25 Oct 2023, Julien Grall wrote:
> 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.

Thanks for letting me know. I took the commit out of for-4.19 and
rebased it.