Re: [Xen-devel] [PATCH v4 16/17] libxl: build a device tree for ARM guests

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2013-11-12 at 19:51 +0000, Stefano Stabellini wrote:
> > +    res = fdt_property_cell(fdt, "phandle", PHANDLE_GIC);
> > +    if (res) return res;
> 
> Why are you adding this property?

When you write e.g. "interrupt-parent = <&gic>" what you are actually
doing is creating a cell with a reference the phandle of the node called
"gic". If you decompile a dtb you'll see that the gic node has a
property "phandle = N" (where N is some unique integer) and that other
nodes have "interrupt-parent = <N>".

So this is adding that phandle property so we can refer to it.

Ian.


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