Commit bbd6eb29 authored by Stefano Stabellini's avatar Stefano Stabellini
Browse files

arm: introduce a DTS for Xen unprivileged virtual machines 



Given that the xenvm machine is based on vexpress but with an extremely
limited selection of peripherals (the guest is supposed to use virtual
devices instead), add "xen,xenvm" to the list of compatible machines in
mach-vexpress.


Changes in v3:

- add comments to mark fields that are likely to be changed by the
hypervisor.


Changes in v2:

- remove include skeleton;
- use #address-cells = <2> and #size-cells = <2>;
- remove the debug bootargs;
- use memory@80000000 instead of memory;
- remove the ranges and interrupt-map from the motherboard node;
- set the machine compatible to "xen,xenvm-4.2", "xen,xenvm";
- rename the dts file to xenvm-4.2.dts;
- add "xen,xenvm" to the list of compatible DT strings to mach-vexpress.


Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: Pawel Moll <pawel.moll@arm.com> (v2m changes)
parent 77bfb479

arch/arm/boot/dts/xenvm-4.2.dts

0 → 100644
+68 −0
Original line number Diff line number Diff line 
/*

 * Xen Virtual Machine for unprivileged guests

 *

 * Based on ARM Ltd. Versatile Express CoreTile Express (single CPU)

 * Cortex-A15 MPCore (V2P-CA15)

 *

 */



/dts-v1/;



/ {

	model = "XENVM-4.2";

	compatible = "xen,xenvm-4.2", "xen,xenvm";

	interrupt-parent = <&gic>;

	#address-cells = <2>;

	#size-cells = <2>;



	chosen {

		/* this field is going to be adjusted by the hypervisor */

		bootargs = "console=hvc0 root=/dev/xvda";

	};



	cpus {

		#address-cells = <1>;

		#size-cells = <0>;



		cpu@0 {

			device_type = "cpu";

			compatible = "arm,cortex-a15";

			reg = <0>;

		};

	};



	memory@80000000 {

		device_type = "memory";

		/* this field is going to be adjusted by the hypervisor */

		reg = <0 0x80000000 0 0x08000000>;

	};



	gic: interrupt-controller@2c001000 {

		compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";

		#interrupt-cells = <3>;

		#address-cells = <0>;

		interrupt-controller;

		reg = <0 0x2c001000 0 0x1000>,

		      <0 0x2c002000 0 0x100>;

	};



	timer {

		compatible = "arm,armv7-timer";

		interrupts = <1 13 0xf08>,

			     <1 14 0xf08>,

			     <1 11 0xf08>,

			     <1 10 0xf08>;

	};



	hypervisor {

		compatible = "xen,xen-4.2", "xen,xen";

		/* this field is going to be adjusted by the hypervisor */

		reg = <0 0xb0000000 0 0x20000>;

		/* this field is going to be adjusted by the hypervisor */

		interrupts = <1 15 0xf08>;

	};



	motherboard {

		arm,v2m-memory-map = "rs1";

	};

};

arch/arm/mach-vexpress/Makefile.boot

+2 −1
Original line number Diff line number Diff line
@@ -7,4 +7,5 @@ initrd_phys-y := 0x60800000 
dtb-$(CONFIG_ARCH_VEXPRESS_DT)	+= vexpress-v2p-ca5s.dtb \

				   vexpress-v2p-ca9.dtb \

				   vexpress-v2p-ca15-tc1.dtb \

				   vexpress-v2p-ca15_a7.dtb
 
				   vexpress-v2p-ca15_a7.dtb \

				   xenvm-4.2.dtb

arch/arm/mach-vexpress/v2m.c

+1 −0
Original line number Diff line number Diff line
@@ -658,6 +658,7 @@ static void __init v2m_dt_init(void) 


const static char *v2m_dt_match[] __initconst = {

	"arm,vexpress",

	"xen,xenvm",

	NULL,

};

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