linux-kernel - Re: [ANNOUNCE] Xen port to Cortex-A15 / ARMv7 with virt extensions

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Message-ID: <alpine.DEB.2.00.1111301112400.31179@kaball-desktop>
Date:	Wed, 30 Nov 2011 11:41:58 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Anup Patel <anup@...infault.org>
CC:	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linaro-dev@...ts.linaro.org" <linaro-dev@...ts.linaro.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>,
	"android-virt@...ts.cs.columbia.edu" 
	<android-virt@...ts.cs.columbia.edu>,
	"embeddedxen-devel@...ts.sourceforge.net" 
	<embeddedxen-devel@...ts.sourceforge.net>
Subject: Re: [ANNOUNCE] Xen port to Cortex-A15 / ARMv7 with virt extensions

On Wed, 30 Nov 2011, Anup Patel wrote:
> Hi all,
> 
> I wanted to know how Xen-ARM for A15 will address following concerns:
> 
> - How will Xen-ARM for A15 support legacy guest environment like ARMv5 or ARMv6 ?

It is not our focus at the moment; we are targeting operating systems
that support a modern ARMv7 machine with GIC support. 
That said, it might be possible to run legacy guests in the future,
introducing more emulation to the hypervisor.


> - What if my Cortex-A15 board does not have a GIC with virtualization support ?

We expect most hardware vendors to provide a GIC with virtualization
support. However if they do not, in order to support their boards we'll
have to do more emulation in the hypervisor.
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