linux-kernel - Re: [PATCH v18 03/11] of: Add a common kexec FDT setup function

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Date:   Sun, 21 Feb 2021 17:32:07 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Cc:     zohar@...ux.ibm.com, bauerman@...ux.ibm.com, robh@...nel.org,
        takahiro.akashi@...aro.org, gregkh@...uxfoundation.org,
        will@...nel.org, joe@...ches.com, catalin.marinas@....com,
        mpe@...erman.id.au, mark.rutland@....com, benh@...nel.crashing.org,
        tao.li@...o.com, paulus@...ba.org, vincenzo.frascino@....com,
        frowand.list@...il.com, sashal@...nel.org, masahiroy@...nel.org,
        jmorris@...ei.org, allison@...utok.net, serge@...lyn.com,
        devicetree@...r.kernel.org, pasha.tatashin@...een.com,
        prsriva@...ux.microsoft.com, hsinyi@...omium.org,
        linux-arm-kernel@...ts.infradead.org, christophe.leroy@....fr,
        mbrugger@...e.com, balajib@...ux.microsoft.com,
        dmitry.kasatkin@...il.com, linux-kernel@...r.kernel.org,
        james.morse@....com, linux-integrity@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v18 03/11] of: Add a common kexec FDT setup function

On Sat, Feb 13, 2021 at 08:10:41AM -0800, Lakshmi Ramasubramanian wrote:
> From: Rob Herring <robh@...nel.org>
> 
> Both arm64 and powerpc do essentially the same FDT /chosen setup for
> kexec.  The differences are either omissions that arm64 should have
> or additional properties that will be ignored.  The setup code can be
> combined and shared by both powerpc and arm64.
> 
> The differences relative to the arm64 version:
>  - If /chosen doesn't exist, it will be created (should never happen).
>  - Any old dtb and initrd reserved memory will be released.
>  - The new initrd and elfcorehdr are marked reserved.
>  - "linux,booted-from-kexec" is set.
> 
> The differences relative to the powerpc version:
>  - "kaslr-seed" and "rng-seed" may be set.
>  - "linux,elfcorehdr" is set.
>  - Any existing "linux,usable-memory-range" is removed.
> 
> Combine the code for setting up the /chosen node in the FDT and updating
> the memory reservation for kexec, for powerpc and arm64, in
> of_kexec_alloc_and_setup_fdt() and move it to "drivers/of/kexec.c".
> 
> Signed-off-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>

s390:allmodconfig:

drivers/of/kexec.c: In function 'of_kexec_alloc_and_setup_fdt':
drivers/of/kexec.c:378:10: error: 'const struct kimage' has no member named 'arch'
  378 |     image->arch.elf_load_addr,
      |          ^~
drivers/of/kexec.c:379:10: error: 'const struct kimage' has no member named 'arch'
  379 |     image->arch.elf_headers_sz);
      |          ^~
drivers/of/kexec.c:387:35: error: 'const struct kimage' has no member named 'arch'
  387 |   ret = fdt_add_mem_rsv(fdt, image->arch.elf_load_addr,
      |                                   ^~
drivers/of/kexec.c:388:16: error: 'const struct kimage' has no member named 'arch'
  388 |           image->arch.elf_headers_sz);
      |                ^~

Guenter