[PATCH/RFC v2] ARM: shmobile: defconfig: Enable LPAE

[Fabrizio Castro]

Hello Florian,

Thank you for your feedback!

> Subject: Re: [PATCH/RFC v2] ARM: shmobile: defconfig: Enable LPAE
>
> On 04/25/2018 09:14 AM, Fabrizio Castro wrote:
> > On iWave's iwg20m DDR1 512MB memory cannot be accessed with 32-bit
> > addresses, hence we need LPAE.
> >
> > Signed-off-by: Biju Das <biju.das at bp.renesas.com>
> > Signed-off-by: Fabrizio Castro <fabrizio.castro at bp.renesas.com>
> > ---
> > This information is mentioned in the "RZ/G Series User’s Manual: Hardware",
> > Chapter 2, Area Map. Is this patch going to break the functionality of other
> > boards? Comments welcome.
>
> LPAE is not supported by all Cortex-A class cores, for instance
> Cortex-A9 does not support LPAE, if you have boards using such cores,
> then this would result in a kernel that would not boot on these
> platforms. Can that be a problem with the shmobile_defconfig?

It definitely is, therefore I am going to drop this patch as it would break things.

Best regards,
Fab

> --
> Florian



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