Re: [PATCH] SUPPORT.MD: Correct the amount of physical memory supported for Arm

[Julien Grall <julien@xxxxxxx>]

On 27/04/2022 14:51, Bertrand Marquis wrote:
> Hi Julien,
Hi Bertrand,

> > On 27 Apr 2022, at 14:22, Julien Grall <julien@xxxxxxx> wrote:
> >
> > From: Julien Grall <jgrall@xxxxxxxxxx>
> >
> > As part of XSA-385, SUPPORT.MD gained a statement regarding the amount
> > of physical memory supported.
> >
> > However, booting Xen on a Arm platform with that amount of memory would
> > result to a breakage because the frametable area is too small.
> >
> > The wiki [1] (as of April 2022) claims we were able to support up to
> > 5 TiB on Arm64 and 16 GiB. However, this is not the case because
> > the struct page_info has always been bigger than expected (56 bytes
> > for 64-bit and 32-bytes for 32-bit).
> >
> > I don't have any HW with such amount of memory. So rather than
> > modifying the code, take the opportunity to use the limit that should
> > work on Arm (2 TiB for 64-bit and 12 GiB for 32-bit).
> Sadly I have no hardware either even remotely near this capacity and
> I think those limits are right for now so...
>
> > Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
> Reviewed-by: Bertrand Marquis <bertrand.marquis@xxxxxxx> #arm part
Thanks! The changes requested by Jan are easy to fix. So instead of 
resubmitting, I have done the modifications and committed the patch 
directly.
Cheers,

--
Julien Grall