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

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Date:	Wed, 04 Nov 2015 09:56:25 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Huan Wang <alison.wang@...escale.com>
Cc:	Christoffer Dall <christoffer.dall@...aro.org>,
	"shawnguo@...nel.org" <shawnguo@...nel.org>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"festevam@...il.com" <festevam@...il.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jin Jason <Jason.Jin@...escale.com>
Subject: Re: [PATCH] ARM: add v7 LPAE multi-platform defconfig

On Wednesday 04 November 2015 03:17:06 Huan Wang wrote:
> > On Tue, Oct 27, 2015 at 10:35:07PM +0800, Alison Wang wrote:
> > > v7 LPAE multi-platform defconfig is based on v7 multi-platform
> > > defconfig and adds LPAE support.
> > >
> > > This defconfig is verified on LS1021A which enables GIANFAR, I2C,
> > > WATCHDOG, AUDIO, EDMA and DSPI drivers, etc.
> > >
> > > Signed-off-by: Alison Wang <alison.wang@...escale.com>
> > 
> > I think this would be great if it also had:
> > 
> > CONFIG_ARCH_VIRT=y
> > CONFIG_VIRTUALIZATION=y
> > CONFIG_KVM=y
> > 
> > That would allow it to be used for KVM testing both as host and guest.
> > 
> > FWIW, I just tried booting this on my TC2, but I don't get any output
> > from there.  Is it supposed to work on this platform?  If not, why not?
> > 
> [Alison Wang] One question, does TC2 support LPAE? If so, we could try to
> find the reason and add it in this defconfig for armv7 LPAE support.

Yes, I think we should enable all platforms that we enable in the normal
multi_v7_defconfig, if we decide to add a new one. Just remove the platforms
that are based on Cortex-A5/A8/A9, Scorpion or PJ4 rather than A7/A12/A15/A17
or Krait.

	Arnd
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