linux-kernel - Re: [PATCH] arm: introduce a DTS for Xen unprivileged virtual machines

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Message-ID: <alpine.DEB.2.02.1209201301340.29232@kaball.uk.xensource.com>
Date:	Thu, 20 Sep 2012 13:02:20 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Dave Martin <dave.martin@...aro.org>
CC:	Pawel Moll <pawel.moll@....com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	Ian Campbell <Ian.Campbell@...rix.com>
Subject: Re: [PATCH] arm: introduce a DTS for Xen unprivileged virtual
 machines

On Thu, 20 Sep 2012, Dave Martin wrote:
> On Thu, Sep 20, 2012 at 11:06:03AM +0100, Pawel Moll wrote:
> > Morning,
> > 
> > On Wed, 2012-09-19 at 18:44 +0100, Stefano Stabellini wrote:
> > > +/dts-v1/;
> > > +
> > > +/include/ "skeleton.dtsi"
> > 
> > Any particular reason to include skeleton? And I think it would be
> > better to use #address-cells = <2> and #size-cells = <2>, to be ready
> > for LPAE addresses...
> > 
> > > +/ {
> > > +	model = "XENVM-4.2";
> > > +	compatible = "xen,xenvm-4.2", "arm,vexpress";
> > > +	interrupt-parent = <&gic>;
> > > +
> > > +	chosen {
> > > +		bootargs = "earlyprintk console=hvc0 root=/dev/xvda init=/sbin/init";
> > > +	};
> 
> Are you sure this default command line is appropriate?
> 
> I don't normally like to see default command lines unless they really
> add something which is crucial for the board to work.
> 
> None of those args looks vital to me.  They are configuration choices
> and should be left up to the user.

Yes, you are right. I'll trim it down to "console=hvc0 root=/dev/xvda".
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