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From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
To: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Cc: zohar@linux.ibm.com, robh@kernel.org, gregkh@linuxfoundation.org,
	james.morse@arm.com, catalin.marinas@arm.com, sashal@kernel.org,
	will@kernel.org, mpe@ellerman.id.au, benh@kernel.crashing.org,
	paulus@samba.org, robh+dt@kernel.org, frowand.list@gmail.com,
	vincenzo.frascino@arm.com, mark.rutland@arm.com,
	dmitry.kasatkin@gmail.com, jmorris@namei.org, serge@hallyn.com,
	pasha.tatashin@soleen.com, allison@lohutok.net,
	kstewart@linuxfoundation.org, takahiro.akashi@linaro.org,
	tglx@linutronix.de, masahiroy@kernel.org, bhsharma@redhat.com,
	mbrugger@suse.com, hsinyi@chromium.org, tao.li@vivo.com,
	christophe.leroy@c-s.fr, linux-integrity@vger.kernel.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	prsriva@linux.microsoft.com, balajib@linux.microsoft.com
Subject: Re: [PATCH v5 1/3] powerpc: Refactor kexec functions to move arch independent code to IMA
Date: Thu, 03 Sep 2020 18:43:54 -0300	[thread overview]
Message-ID: <87y2lqy1r9.fsf@morokweng.localdomain> (raw)
In-Reply-To: <20200901195029.30039-2-nramas@linux.microsoft.com>


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

> The functions ima_get_kexec_buffer() and ima_free_kexec_buffer() that
> handle carrying forward the IMA measurement logs on kexec for powerpc
> do not have architecture specific code, but they are currently defined
> for powerpc only.
>
> Move these functions to IMA subsystem so that it can be used for other
> architectures as well. A later patch in this series will use these
> functions for carrying forward the IMA measurement log for ARM64.
>
> Define FDT_PROP_IMA_KEXEC_BUFFER for the chosen node, namely
> "linux,ima-kexec-buffer", that is added to the DTB to hold
> the address and the size of the memory reserved to carry
> the IMA measurement log.
>
> Co-developed-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
> Signed-off-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
> Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>

do_get_kexec_buffer() is still duplicated in generic code and powerpc
code. It's a small and simple function though, so not really a problem.

I think you'll need to move over remove_ima_buffer() if you agree with
the comment I'll make on patch 3, in which case the powerpc-specific
do_get_kexec_buffer() can be removed.

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

-- 
Thiago Jung Bauermann
IBM Linux Technology Center

  reply	other threads:[~2020-09-03 21:45 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-01 19:50 [PATCH v5 0/3] Carry forward IMA measurement log on kexec on ARM64 Lakshmi Ramasubramanian
2020-09-01 19:50 ` [PATCH v5 1/3] powerpc: Refactor kexec functions to move arch independent code to IMA Lakshmi Ramasubramanian
2020-09-03 21:43   ` Thiago Jung Bauermann [this message]
2020-09-01 19:50 ` [PATCH v5 2/3] arm64: Store IMA log information in kimage used for kexec Lakshmi Ramasubramanian
2020-09-03 21:50   ` Thiago Jung Bauermann
2020-09-01 19:50 ` [PATCH v5 3/3] arm64: Add IMA kexec buffer to DTB Lakshmi Ramasubramanian
2020-09-03 22:11   ` Thiago Jung Bauermann
2020-09-04  4:45     ` Lakshmi Ramasubramanian

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