Re: [PATCH v3 2/6] xen/arm: mpu: Introduce choice between MMU and MPU

[Julien Grall <julien@xxxxxxx>]

On 14/10/2024 19:43, Luca Fancellu wrote:
> Hi Ayan,
>
> > On 10 Oct 2024, at 15:03, Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx> wrote:
> >
> > There are features in the forthcoming patches which are dependent on
> > MPU. For eg fixed start address.
> > Also, some of the Xen features (eg STATIC_MEMORY) will be selected
> > by the MPU configuration.
> >
> > Thus, this patch introduces a choice between MMU and MPU for the type
> > of memory management system. By default, MMU is selected.
> > MPU is now gated by UNSUPPORTED.
> >
> > Update SUPPORT.md to state that the support for MPU is experimental.
> Maybe I’m wrong, but shouldn’t we add this only when MPU is supported?
The support of the MPU will happen quite a long way down the line. We 
will first start with experimental (which implies the code may or may 
not work) and I think this is correct to do that now.
Cheers,

--
Julien Grall