linux-kernel - Re: [PATCH 1/2] arm64: dts: Add dts files for Marvell Berlin4CT SoC

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Message-ID: <20150721145643.GD10595@leverpostej>
Date:	Tue, 21 Jul 2015 15:56:43 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Jisheng Zhang <jszhang@...vell.com>
Cc:	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	"khilman@...aro.org" <khilman@...aro.org>,
	"arnd@...db.de" <arnd@...db.de>, "olof@...om.net" <olof@...om.net>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	Pawel Moll <Pawel.Moll@....com>,
	Marc Zyngier <Marc.Zyngier@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/2] arm64: dts: Add dts files for Marvell Berlin4CT SoC

On Tue, Jul 21, 2015 at 03:50:06PM +0100, Jisheng Zhang wrote:
> Dear Mark,
> 
> Thanks a lot for so quick review!
> 
> On Tue, 21 Jul 2015 15:34:26 +0100
> Mark Rutland <mark.rutland@....com> wrote:
> 
> > Hi,
> > 
> > > +/dts-v1/;
> > > +
> > > +/memreserve/ 0x00000000 0x01000000;
> > 
> > What's this reservation for?
> 
> This is reserved for some firmwares' usage.
> 
> > 
> > Given you're using PSCI I can't see why we'd expect the kernel to map
> > but not use some memory.
> 
> Is it acceptable that we make memory start at 0x01000000 instead of reservation?

Yes, though it would still be worth a comment as to why that memory
can't be used.

Thanks,
Mark.
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