linux-kernel - Re: [PATCH v5 2/6] powerpc/kexec_file: Add KEXEC

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Date:   Wed, 09 Feb 2022 15:43:17 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Michal Suchanek <msuchanek@...e.de>, keyrings@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-integrity@...r.kernel.org
Cc:     Michal Suchanek <msuchanek@...e.de>, kexec@...ts.infradead.org,
        Philipp Rudo <prudo@...hat.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Nayna <nayna@...ux.vnet.ibm.com>, Rob Herring <robh@...nel.org>,
        linux-s390@...r.kernel.org, Vasily Gorbik <gor@...ux.ibm.com>,
        Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Jessica Yu <jeyu@...nel.org>, linux-kernel@...r.kernel.org,
        David Howells <dhowells@...hat.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Paul Mackerras <paulus@...ba.org>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org,
        Frank van der Linden <fllinden@...zon.com>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Daniel Axtens <dja@...ens.net>, buendgen@...ibm.com,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Baoquan He <bhe@...hat.com>,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v5 2/6] powerpc/kexec_file: Add KEXEC_SIG support.

Michal Suchanek <msuchanek@...e.de> writes:
> Copy the code from s390x
>
> Both powerpc and s390x use appended signature format (as opposed to EFI
> based patforms using PE format).
>
> Signed-off-by: Michal Suchanek <msuchanek@...e.de>
> ---
> v3: - Philipp Rudo <prudo@...hat.com>: Update the comit message with
>       explanation why the s390 code is usable on powerpc.
>     - Include correct header for mod_check_sig
>     - Nayna <nayna@...ux.vnet.ibm.com>: Mention additional IMA features
>       in kconfig text
> ---
>  arch/powerpc/Kconfig        | 16 ++++++++++++++++
>  arch/powerpc/kexec/elf_64.c | 36 ++++++++++++++++++++++++++++++++++++
>  2 files changed, 52 insertions(+)

I haven't tested this on powerpc, but assuming you have Michal this
looks OK to me.

Acked-by: Michael Ellerman <mpe@...erman.id.au>

cheers