From: Arnd Bergmann <arnd@arndb.de>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: [PATCH 5/9] ARM: Xen: fix initial build problems:
Date: Tue, 9 Oct 2012 18:21:27 +0000
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Cc: Russell King <rmk+kernel@arm.linux.org.uk>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Jeremy Fitzhardinge <jeremy@goop.org>,
        "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
References: <1349796183-30648-1-git-send-email-arnd@arndb.de> <1349796183-30648-6-git-send-email-arnd@arndb.de> <alpine.DEB.2.02.1210091630170.29539@kaball.uk.xensource.com>
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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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