linux-kernel - Re: arm: CONFIG_ARM_PATCH_PHYS

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Date:	Mon, 09 Apr 2012 22:28:28 +0100
From:	Ian Campbell <ijc@...lion.org.uk>
To:	Sergei Trofimovich <slyich@...il.com>
Cc:	Russell King <rmk+kernel@....linux.org.uk>,
	linux-kernel@...r.kernel.org, Will Deacon <will.deacon@....com>
Subject: Re: arm: CONFIG_ARM_PATCH_PHYS_VIRT=y is broken on kirkwood

On Sun, 2012-04-08 at 11:59 +0300, Sergei Trofimovich wrote:
> In order to make the box boot I had to set:
>     CONFIG_EMBEDDED=y
>     # CONFIG_ARM_PATCH_PHYS_VIRT is not set
>    CONFIG_PHYS_OFFSET=0x0
> 
> Do you have an idea why it does not boot anymore by default?

There is a u-boot commit which fixes this issue:

commit 679530278d5a79d34e356ad2d452f4400953bfc2
Author: Michael Walle <[michael@...le.cc]>
Date:   Mon Feb 6 22:42:10 2012 +0530

    arm, arm-kirkwood: disable l2c before linux boot
    
    The decompressor expects the L2 cache to be disabled. This fixes booting
    some kernels, which have CONFIG_ARM_PATCH_PHYS_VIRT enabled.
    
    Signed-off-by: Michael Walle <michael@...le.cc>
    Acked-by: Prafulla Wadaskar <prafulla@...vell.com>
    Cc: Albert ARIBAUD <albert.u.boot@...baud.net>
    Cc: Prafulla Wadaskar <prafulla@...vell.com>
    Cc: Wolfgang Denk <wd@...x.de>

Ian.

-- 
Ian Campbell


If I can have honesty, it's easier to overlook mistakes.
		-- Kirk, "Space Seed", stardate 3141.9

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