Re: [PATCH 4/8] arm: link a device tree blob into the xen image

[Tim Deegan <tim@xen.org>]

At 13:52 +0000 on 10 Feb (1328881958), Ian Campbell wrote:
> On Fri, 2012-02-10 at 13:40 +0000, David Vrabel wrote:
> > On 10/02/12 13:35, Ian Campbell wrote:
> > > On Fri, 2012-02-10 at 13:03 +0000, David Vrabel wrote:
> > >> From: David Vrabel <david.vrabel@citrix.com>
> > >>
> > >> Link a device tree blob (DTB) into the xen image.  This is loaded
> > >> immediately after Xen and xen_start() is called with the correct
> > >> address in atag_paddr.
> > > 
> > > Is platform.dtb supposed to be included in this patch/series or is it
> > > intended that I should supply it from somewhere? (in which case, how and
> > > where etc).
> > 
> > I make a symlink to vexpress-v2p-aem-v7a.dtb built in my Linux tree.
> > 
> > Would it be better build the DTB from source included in Xen?
> 
> I guess that's what Linux has done but I don't know if we want to
> replicate all that and keep syncing etc. On the flip side I suppose it's
> currently only a single platform.

I think we should take it into our tree in some form, unless there's a
way to automatically extract it from the dom0 kernel at boot.  It should
be possible to recompile Xen without needing to configure and build a
linux kernel.

In theory this will eventually be provided by the bootloader or
firmware, right?

Tim.