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

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Date:	Thu, 20 Sep 2012 12:55:33 +0100
From:	Pawel Moll <pawel.moll@....com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] arm: introduce a DTS for Xen unprivileged virtual
 machines

On Thu, 2012-09-20 at 12:39 +0100, Stefano Stabellini wrote:
> There are no peripherals apart from the ones that are already described
> here (timer, gic). All the peripherals that the guest sees are virtual
> devices that show up on xenbus (a virtual bus). In order to initialize
> xenbus, the guest only needs the hypervisor node.  So I'll remove the
> ranges and interrupt-map.

So all the peripherals are actually discoverable - awesome!

But the fact is that the only "vexpressness" of this tree is
memory@...00000 and gic@...01000. The rest (not much of it ;-) is a
"generic A15 platform". 

I understand that you had to use some "compatible" value to get
initialization code and I'm flattered ;-) by your choice of
"arm,vexpress", but maybe - as suggested by others - you would be better
off with generating this stuff in runtime, by whatever tool is used to
instantiate the guest?

Paweł

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