Hi Julien, On 24/10/2023 12:09, Julien Grall wrote: > > > From: Julien Grall <[email protected]> > > In commit 9d267c049d92 ("xen/arm64: Rework the memory layout"), > we decided to require Xen to be loaded below 5 TiB to simplify s/5/2
> 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 > > Signed-off-by: Julien Grall <[email protected]> > > ---- one less '-' > > I couldn't find a nice way to document it in SUPPORT.md. So I decided > to only document the restrict in docs/misc/arm/booting.txt for now. > > I also couldn't find any way from GRUB/UEFI (I didn't look much) to > specify the loading address. > --- > docs/misc/arm/booting.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/docs/misc/arm/booting.txt b/docs/misc/arm/booting.txt > index 02f7bb65ec6d..c6bdeafe5e5b 100644 > --- a/docs/misc/arm/booting.txt > +++ b/docs/misc/arm/booting.txt > @@ -21,6 +21,10 @@ The exceptions to this on 32-bit ARM are as follows: > zImage protocol should still be used and not the stricter "raw > (non-zImage)" protocol described in arm/Booting. > > +The exceptions to this on 64-bit ARM are as follows: > + > + Xen binary should be loaded in memory below 2 TiB. > + > There are no exception on 64-bit ARM. This sentence needs to be dropped then. With that: Reviewed-by: Michal Orzel <[email protected]> ~Michal
