linux-kernel - Re: [PATCH 1/2] ARM: dts: at91: sama5d4: change DMA allocation for secure peripherals

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Message-ID: <20161207085716.snqzkhuqyfl6uto6@piout.net>
Date:   Wed, 7 Dec 2016 09:57:16 +0100
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     Nicolas Ferre <nicolas.ferre@...el.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Boris BREZILLON <boris.brezillon@...e-electrons.com>,
        Ludovic Desroches <ludovic.desroches@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ARM: dts: at91: sama5d4: change DMA allocation for
 secure peripherals

On 30/11/2016 at 18:36:29 +0100, Nicolas Ferre wrote :
> Some peripherals are "Programmable Secure" but left as "Secure" by default.
> If tried to be connected to Non-Secure DMA controller, the possibility to
> leak secure data is prevented so using these peripherals with DMA1 is not
> possible with this default configuration (MATRIX_SPSELR registers setup by
> bootloader).
> Move them to DMA0 which is an "Always-Secure" DMA controller.
> 
> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
> ---
>  arch/arm/boot/dts/sama5d4.dtsi | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
All applied, thanks.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com