linux-kernel - Re: [PATCH v11 3/4] mtd: rawnand: Add support for secure regions in NAND memory

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Message-Id: <20210407090645.45522-1-miquel.raynal@bootlin.com>
Date:   Wed,  7 Apr 2021 11:06:45 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        robh+dt@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        boris.brezillon@...labora.com, Daniele.Palmas@...it.com,
        bjorn.andersson@...aro.org
Subject: Re: [PATCH v11 3/4] mtd: rawnand: Add support for secure regions in NAND memory

On Fri, 2021-04-02 at 15:01:27 UTC, Manivannan Sadhasivam wrote:
> On a typical end product, a vendor may choose to secure some regions in
> the NAND memory which are supposed to stay intact between FW upgrades.
> The access to those regions will be blocked by a secure element like
> Trustzone. So the normal world software like Linux kernel should not
> touch these regions (including reading).
> 
> The regions are declared using a NAND chip DT property,
> "secure-regions". So let's make use of this property in the raw NAND
> core and skip access to the secure regions present in a system.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel