linux-kernel - Re: [RFC PATCH] ARM: add v7 LPAE multi-platform defconfig

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Date:	Mon, 9 Nov 2015 19:38:12 -0800
From:	Olof Johansson <olof@...om.net>
To:	Alison Wang <b18965@...escale.com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, riku.voipio@...aro.org,
	Shawn Guo <shawnguo@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Thierry Reding <treding@...dia.com>,
	Ray Jui <rjui@...adcom.com>,
	"alexandre.belloni@...e-electrons.com" 
	<alexandre.belloni@...e-electrons.com>,
	Lee Jones <lee.jones@...aro.org>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Kukjin Kim <kgene@...nel.org>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Krzysztof Kozłowski <k.kozlowski@...sung.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Jason Cooper <jason@...edaemon.net>,
	Dinh Nguyen <dinguyen@...era.com>,
	Pawel Moll <pawel.moll@....com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Andrew Lunn <andrew@...n.ch>, Lior Amsalem <alior@...vell.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Josh Cartwright <josh.cartwright@...com>,
	Soren Brinkmann <soren.brinkmann@...inx.com>,
	Andy Gross <agross@...eaurora.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	jason.jin@...escale.com, Alison Wang <alison.wang@...escale.com>
Subject: Re: [RFC PATCH] ARM: add v7 LPAE multi-platform defconfig

Hi Alison,

On Mon, Nov 9, 2015 at 6:53 PM, Alison Wang <b18965@...escale.com> wrote:
> v7 LPAE multi-platform defconfig is based on v7 multi-platform
> defconfig and adds LPAE support.
>
> The platforms based on Cortex-A7/A12/A15/A17, PJ4B, Krait are
> also enabled in this defconfig. But Cortex-A5/A8/A9, Scorpion
> and PJ4 are removed.
>
> This defconfig is verified on LS1021A which enables GIANFAR,
> I2C, WATCHDOG, AUDIO, EDMA and DSPI drivers, etc.
>
> The other platforms need to be verified by the platform
> maintainers too.
>
> Signed-off-by: Alison Wang <alison.wang@...escale.com>

This has been discussed before, and what we have chosen to do is to
just have a multi_v7_defconfig that all these platforms are enabled on
but with LPAE off.

Instead, what we do when building (and on our build/boot builders) is
to take multi_v7 and provide the snippet that turns on ARM_LPAE at
that time.


Regards,

-Olof
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