From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian.Campbell@citrix.com (Ian Campbell) Date: Thu, 20 Sep 2012 14:30:26 +0100 Subject: [PATCH] arm: introduce a DTS for Xen unprivileged virtual machines In-Reply-To: <505B0C00.5010003@arm.com> References: <1348076658-4511-1-git-send-email-stefano.stabellini@eu.citrix.com> <1348135563.11116.94.camel@hornet> <1348142133.11116.109.camel@hornet> <505B0C00.5010003@arm.com> Message-ID: <1348147826.26501.47.camel@zakaz.uk.xensource.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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.