linux-kernel - RE: [PATCH] arm: l2c: unlock ways when in non-secure mode

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Message-ID: <DB6PR04MB3221D60D0EC8D5B31869AA6588240@DB6PR04MB3221.eurprd04.prod.outlook.com>
Date:   Sun, 26 Nov 2017 23:56:10 +0000
From:   Peng Fan <peng.fan@....com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "van.freenix@...il.com" <van.freenix@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Chris Brandt <chris.brandt@...esas.com>,
        Will Deacon <will.deacon@....com>
Subject: RE: [PATCH] arm: l2c: unlock ways when in non-secure mode

Hi Russell,

> Subject: Re: [PATCH] arm: l2c: unlock ways when in non-secure mode
> 
> On Sun, Nov 26, 2017 at 08:25:30PM +0800, Peng Fan wrote:
> > To boot Linux in Non-secure mode with l2x0, the l2x0 controller is
> > enabled in secure mode and ways locked to make it seems L2 cache
> > disabled during linux boot process. So during l2x0 initialization,
> > need to unlock the ways to make l2x0 could cache data/inst.
> 
> Why was this chosen instead of doing what everyone else does?

I am not aware of how other platform handles the l2x0 unlock in non
secure mode. Could you please share with me what others choose?

Thanks,
Peng.

> 
> --
> RMK's Patch system:
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> armlinux.org.uk%2Fdeveloper%2Fpatches%2F&data=02%7C01%7Cpeng.fan%4
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