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

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2012-09-20 at 13:28 +0100, Marc Zyngier wrote:
> I think the important thing here is that the memory map is RS1. As this
> is a (very limited) subset of a vexpress A15, it seems to make some sense.

Looking at arch/arm/boot/dts/vexpress-v2m-rs1.dtsi I don't think we
provide anything which is on rs1 though.

The Xen VM environment has only a gic (via a combination of the gic
virtualisation mode for CPU regs and emulation for the distributor), the
arch timers and xenbus (which is the s/w bus which Xen uses to discover
its paravirtualised peripherals).

Currently we provide a very simple output only emulation of UART0,
simply to get the debug output from the decompresser, but we want that
to go away not get baked in.

Ian.


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