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From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Huan Wang <alison.wang@freescale.com>, Fabio Estevam <festevam@gmail.com>,
        Russell King - ARM Linux <linux@arm.linux.org.uk>,
        "shawnguo@kernel.org" <shawnguo@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Jin Jason <Jason.Jin@freescale.com>
Subject: Re: [PATCH v4] ARM: configs: Add Freescale LS1021A defconfig
Date: Thu, 24 Sep 2015 09:34:22 +0200
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On Thursday 24 September 2015 07:27:10 Huan Wang wrote:
> > On Fri, Sep 18, 2015 at 4:38 AM, Huan Wang <alison.wang@freescale.com>
> > wrote:
> > 
> > > [Alison Wang] Thanks for your reply. I agreed with you about creating
> > > a new multi_v7_lpae_defconfig. In multi_v7_lpae_defconfig, I need to
> > > add the following CONFIG_XX to support LS1021A based on
> > multi_v7_defconfig.
> > >
> > > CONFIG_ARM_LPAE=y
> > > CONFIG_VMSPLIT_2G=y
> > 
> > Is CONFIG_VMSPLIT_2G=y really needed?
> [Alison Wang] I tried to remove CONFIG_VMSPLIT_2G and used the default CONFIG_VMSPLIT_3G,
> but kernel could not boot up. It hangs at " Starting kernel ... ".
> 
> Any suggestion? Thanks.

Try enabling DEBUG_LL for your platform to get some debug output, if  you
still don't get any helpful messages, try also inserting 

	printascii(__func__);

statements in the early boot process to see how far you get before the hang.

	Arnd