linux-kernel - Re: [PATCH] powerpc/mpc85xx: also write addr

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Date:   Tue, 24 Dec 2019 19:23:10 -0600
From:   Scott Wood <oss@...error.net>
To:     Yingjie Bai <byj.tea@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     yingjie_bai@....com, Kumar Gala <galak@...nel.crashing.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/mpc85xx: also write addr_h to spin table for
 64bit boot entry

On Tue, 2019-12-24 at 09:35 +0800, Yingjie Bai wrote:
> Hi Michael,
> Thanks for pointing out the issue. My mistake...
> This patch should indeed make sense only when
> CONFIG_PHYS_64BIT=y
> 
> I could not find corenet32_smp_defconfig, but I guess in your config,
> CONFIG_PHYS_64BIT=n ?
> I will update the patch later today

corenet32_smp_defconfig is a makefile rule that pulls in multiple config
fragments.  It has CONFIG_PHYS_64BIT=y, but __pa() returns an unsigned long
regardless (which obviously needs to be fixed if DDR starting beyond 4G is to
be supported).

What 32-bit config are you using where this actually builds?

-Scott