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Date: Wed, 2 Sep 2020 18:32:17 +0200
From: Simon Horman <horms@verge.net.au>
Subject: Re: [PATCH] arm: kdump: Add DT properties to crash dump kernel's DTB
Message-ID: <20200902163217.GH21427@vergenet.net>
References: <20200902154129.6358-1-geert+renesas@glider.be>
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To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linux-Renesas <linux-renesas-soc@vger.kernel.org>, Akashi Takahiro <takahiro.akashi@linaro.org>, Lukasz Stelmach <l.stelmach@samsung.com>, kexec@lists.infradead.org, Linux ARM <linux-arm-kernel@lists.infradead.org>

On Wed, Sep 02, 2020 at 05:48:00PM +0200, Geert Uytterhoeven wrote:
> On Wed, Sep 2, 2020 at 5:41 PM Geert Uytterhoeven
> <geert+renesas@glider.be> wrote:
> > Pass the following properties to the crash dump kernel, to provide a
> > modern DT interface between kexec and the crash dump kernel:
> >
> >   - linux,elfcorehdr: ELF core header segment, similar to the
> >     "elfcorehdr=" kernel parameter.
> >   - linux,usable-memory-range: Usable memory reserved for the crash dump
> >     kernel.
> >     This makes the memory reservation explicit, so Linux no longer needs
> >     to mask the program counter, and rely on the "mem=" kernel parameter
> >     to obtain the start and size of usable memory.
> >
> > For backwards compatibility, the "elfcorehdr=" and "mem=" kernel
> > parameters are still appended to the kernel command line.
> >
> > Loosely based on the ARM64 version by Akashi Takahiro.
> >
> > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> 
> The counterpart patch for linux is "[PATCH] ARM: Parse kdump DT
> properties"
> (https://lore.kernel.org/r/20200902154538.6807-1-geert+renesas@glider.be)

Thanks Geert,

I think it would be best to hold-off on the user-space patch
until the kernel patch is accepted.

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