linux-kernel - Re: [PATCH v18 06/11] powerpc: Move ima buffer fields to struct kimage

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Date:   Mon, 15 Feb 2021 18:58:37 -0300
From:   Thiago Jung Bauermann <bauerman@...ux.ibm.com>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Cc:     zohar@...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, james.morse@....com,
        sashal@...nel.org, benh@...nel.crashing.org, paulus@...ba.org,
        frowand.list@...il.com, vincenzo.frascino@....com,
        mark.rutland@....com, dmitry.kasatkin@...il.com, jmorris@...ei.org,
        serge@...lyn.com, pasha.tatashin@...een.com, allison@...utok.net,
        masahiroy@...nel.org, mbrugger@...e.com, hsinyi@...omium.org,
        tao.li@...o.com, christophe.leroy@....fr,
        prsriva@...ux.microsoft.com, balajib@...ux.microsoft.com,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v18 06/11] powerpc: Move ima buffer fields to struct kimage


Lakshmi Ramasubramanian <nramas@...ux.microsoft.com> writes:

> The fields ima_buffer_addr and ima_buffer_size in "struct kimage_arch"
> for powerpc are used to carry forward the IMA measurement list across
> kexec system call.  These fields are not architecture specific, but are
> currently limited to powerpc.
>
> arch_ima_add_kexec_buffer() defined in "arch/powerpc/kexec/ima.c"
> sets ima_buffer_addr and ima_buffer_size for the kexec system call.
> This function does not have architecture specific code, but is
> currently limited to powerpc.
>
> Move ima_buffer_addr and ima_buffer_size to "struct kimage".
> Set ima_buffer_addr and ima_buffer_size in ima_add_kexec_buffer()
> in security/integrity/ima/ima_kexec.c.
>
> Co-developed-by: Prakhar Srivastava <prsriva@...ux.microsoft.com>
> Signed-off-by: Prakhar Srivastava <prsriva@...ux.microsoft.com>
> Signed-off-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
> Suggested-by: Will Deacon <will@...nel.org>
> ---
>  arch/powerpc/include/asm/ima.h     |  3 ---
>  arch/powerpc/include/asm/kexec.h   |  5 -----
>  arch/powerpc/kexec/ima.c           | 29 ++++++-----------------------
>  include/linux/kexec.h              |  3 +++
>  security/integrity/ima/ima_kexec.c |  8 ++------
>  5 files changed, 11 insertions(+), 37 deletions(-)

Reviewed-by: Thiago Jung Bauermann <bauerman@...ux.ibm.com>

-- 
Thiago Jung Bauermann
IBM Linux Technology Center