linux-kernel - Re: [PATCH 5/9] ARM: Xen: fix initial build problems:

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Message-Id: <201210091821.27818.arnd@arndb.de>
Date:	Tue, 9 Oct 2012 18:21:27 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	Russell King <rmk+kernel@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>
Subject: Re: [PATCH 5/9] ARM: Xen: fix initial build problems:

On Tuesday 09 October 2012, Stefano Stabellini wrote:
> >  config XEN
> >       bool "Xen guest support on ARM (EXPERIMENTAL)"
> >       depends on EXPERIMENTAL && ARM && OF
> > +     depends on !CPU_V6
> >       help
> >         Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
> 
> Considering that we rely on the virtualization extensions, this one can
> be:
> 
>     depends on CPU_V7
> 
> The rest looks fine. I can submit a second patch to change !CPU_V6 into
> CPU_V7 later, if you prefer.

CPU_V6 and CPU_V7 are not exclusive, I saw the problem when building a
combined kernel for both V6 and V7. The code also needs to depend on ARMv7
with virtualization extensions, but that is a different issue. We don't
actually have a configuration symbol for that yet, as far as I can tell.

	Arnd
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