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From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
To: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Cc: mark.rutland@arm.com, benh@kernel.crashing.org,
	bhsharma@redhat.com, tao.li@vivo.com, zohar@linux.ibm.com,
	paulus@samba.org, vincenzo.frascino@arm.com,
	frowand.list@gmail.com, sashal@kernel.org, mpe@ellerman.id.au,
	masahiroy@kernel.org, jmorris@namei.org,
	takahiro.akashi@linaro.org, linux-arm-kernel@lists.infradead.org,
	catalin.marinas@arm.com, serge@hallyn.com,
	devicetree@vger.kernel.org, pasha.tatashin@soleen.com,
	will@kernel.org, prsriva@linux.microsoft.com,
	hsinyi@chromium.org, allison@lohutok.net,
	christophe.leroy@c-s.fr, mbrugger@suse.com,
	balajib@linux.microsoft.com, dmitry.kasatkin@gmail.com,
	linux-kernel@vger.kernel.org, james.morse@arm.com,
	gregkh@linuxfoundation.org, linux-integrity@vger.kernel.org
Subject: Re: [PATCH v13 6/6] arm64: Add IMA log information in kimage used for kexec
Date: Tue, 22 Dec 2020 22:17:44 -0300	[thread overview]
Message-ID: <87sg7xjp6v.fsf@manicouagan.localdomain> (raw)
In-Reply-To: <20201219175713.18888-7-nramas@linux.microsoft.com>


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

> Address and size of the buffer containing the IMA measurement log need
> to be passed from the current kernel to the next kernel on kexec.
>
> Any existing "linux,ima-kexec-buffer" property in the device tree
> needs to be removed and its corresponding memory reservation in
> the currently running kernel needs to be freed. The address and
> size of the current kernel's IMA measurement log need to be added
> to the device tree's IMA kexec buffer node and memory for the buffer
> needs to be reserved for the log to be carried over to the next kernel
> on the kexec call.
>
> Add address and size fields to "struct kimage_arch" for ARM64 platform
> to hold the address and size of the IMA measurement log buffer. Remove
> any existing "linux,ima-kexec-buffer" property in the device tree and
> free the corresponding memory reservation in the currently running
> kernel. Add "linux,ima-kexec-buffer" property to the device tree and
> reserve the memory for storing the IMA log that needs to be passed from
> the current kernel to the next one.
>
> Update CONFIG_KEXEC_FILE to select CONFIG_HAVE_IMA_KEXEC to indicate
> that the IMA measurement log information is present in the device tree
> for ARM64.
>
> 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>
> ---
>  arch/arm64/Kconfig             | 1 +
>  arch/arm64/include/asm/kexec.h | 5 +++++
>  2 files changed, 6 insertions(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 1d466addb078..c85d18b1f2fd 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -1094,6 +1094,7 @@ config KEXEC
>  config KEXEC_FILE
>  	bool "kexec file based system call"
>  	select KEXEC_CORE
> +	select HAVE_IMA_KEXEC
>  	help
>  	  This is new version of kexec system call. This system call is
>  	  file based and takes file descriptors as system call argument

As I suggested in the other email, this should be:

	select HAVE_IMA_KEXEC if IMA

-- 
Thiago Jung Bauermann
IBM Linux Technology Center

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      reply	other threads:[~2020-12-23  1:19 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-19 17:57 [PATCH v13 0/6] Carry forward IMA measurement log on kexec on ARM64 Lakshmi Ramasubramanian
2020-12-19 17:57 ` [PATCH v13 1/6] ima: Move arch_ima_add_kexec_buffer() to ima Lakshmi Ramasubramanian
2020-12-22 14:22   ` Mimi Zohar
2020-12-22 22:53   ` Thiago Jung Bauermann
2020-12-19 17:57 ` [PATCH v13 2/6] powerpc: Move arch independent ima kexec functions to drivers/of/kexec.c Lakshmi Ramasubramanian
2020-12-22 14:26   ` Mimi Zohar
2020-12-22 18:53     ` Lakshmi Ramasubramanian
2020-12-22 19:45       ` Mimi Zohar
2020-12-22 21:02         ` Lakshmi Ramasubramanian
2020-12-23  0:40           ` Thiago Jung Bauermann
2020-12-23  5:03             ` Lakshmi Ramasubramanian
2020-12-23  0:19   ` Thiago Jung Bauermann
2020-12-23  5:01     ` Lakshmi Ramasubramanian
2020-12-23 17:57       ` Thiago Jung Bauermann
2020-12-23  0:48   ` Thiago Jung Bauermann
2020-12-23  4:56     ` Lakshmi Ramasubramanian
2020-12-31 22:28   ` Rob Herring
2020-12-19 17:57 ` [PATCH v13 3/6] kexec: Use fdt_appendprop_addrrange() to add ima buffer to FDT Lakshmi Ramasubramanian
2020-12-23  0:57   ` Thiago Jung Bauermann
2020-12-19 17:57 ` [PATCH v13 4/6] powerpc: Delete unused function delete_fdt_mem_rsv() Lakshmi Ramasubramanian
2020-12-23  1:08   ` Thiago Jung Bauermann
2020-12-23  5:09     ` Lakshmi Ramasubramanian
2020-12-19 17:57 ` [PATCH v13 5/6] arm64: Free DTB buffer if fdt_open_into() fails Lakshmi Ramasubramanian
2020-12-23  1:11   ` Thiago Jung Bauermann
2020-12-19 17:57 ` [PATCH v13 6/6] arm64: Add IMA log information in kimage used for kexec Lakshmi Ramasubramanian
2020-12-23  1:17   ` Thiago Jung Bauermann [this message]

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