linux-kernel - Re: [PATCH 2/2] ARM: multi_v7

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Date:   Fri, 29 Dec 2017 08:50:10 +0800
From:   Peng Fan <van.freenix@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Peng Fan <peng.fan@....com>, arnd@...db.de, linux@...linux.org.uk,
        shawnguo@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Olof Johansson <olof@...om.net>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Rask Ingemann Lambertsen <rask@...melder.dk>,
        Valentin Rothberg <valentinrothberg@...il.com>,
        Andy Gross <andy.gross@...aro.org>,
        Dong Aisheng <aisheng.dong@....com>
Subject: Re: [PATCH 2/2] ARM: multi_v7_defconfig: Enable OP-TEE

On Thu, Dec 28, 2017 at 02:03:01PM +0100, Krzysztof Kozlowski wrote:
>On Thu, Dec 28, 2017 at 10:34 AM, Peng Fan <peng.fan@....com> wrote:
>> Enable OP-TEE for multi_v7_defconfig
>
>Why? You essentially copied here the subject of patch. That is not enough.

This patch could be dropped. Previously, I could not select OP-TEE in
imx_v6_v7_defconfig, seems things changed. I'll move this to imx_v6_v7_defconfig.

OP-TEE stands for Open Portable Trusted Execution Environment. With Linux
running in trustzone nonsecure world, OP-TEE runs in secure world,
with TEE/OP-TEE driver enabled, linux could use secure services provided
by OP-TEE. With TEE/OP-TEE options selected, we could use the following
node to let the driver probed.
"
        firmware {
			optee {
				compatible = "linaro,optee-tz";
				method = "smc";
			};
		};
"

Thanks,
Peng.
>
>Best regards,
>Krzysztof

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