[PATCH 00/24] Introduce Xen support on ARM

From: Stefano Stabellini
Date: Thu Jul 26 2012 - 11:34:16 EST

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Hi all,
this patch series implements Xen support for ARMv7 with virtualization
extensions. It allows a Linux guest to boot as dom0 and
as domU on Xen on ARM. PV console, disk and network frontends and
backends are all working correctly.

It has been tested on a Versatile Express Cortex A15 emulator, using the
latest Xen, and a simple ad-hoc tool to build guest domains
(marc.info/?l=xen-devel&m=134089788016546).

The patch marked with [HACK] shouldn't be applied and is part of the
series only because it is needed to create domUs.

I am also attaching to this email the dts'es that I am currently using
for dom0 and domU: vexpress-v2p-ca15-tc1.dts is the dts used for dom0
and it is passed to Linux by Xen, while vexpress-virt.dts is the dts
used for other domUs and it is appended in binary form to the guest
kernel image. I am not sure where they are supposed to live yet, so I am
just attaching them here so that people can actually try out this series
if they want to.

Comments are very welcome!

Ian Campbell (2):
ARM: enable earlyprintk=xen
[HACK] xen/arm: implement xen_remap_domain_mfn_range

Stefano Stabellini (22):
arm: initial Xen support
xen/arm: hypercalls
xen/arm: page.h definitions
xen/arm: sync_bitops
xen/arm: empty implementation of grant_table arch specific functions
xen: missing includes
xen/arm: Xen detection and shared_info page mapping
xen/arm: Introduce xen_pfn_t for pfn and mfn types
xen/arm: compile and run xenbus
xen: do not compile manage, balloon, pci, acpi and cpu_hotplug on ARM
xen/arm: introduce CONFIG_XEN on ARM
xen/arm: Introduce xen_guest_init
xen/arm: get privilege status
xen/arm: initialize grant_table on ARM
xen/arm: receive Xen events on ARM
xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree
xen: allow privcmd for HVM guests
xen/arm: compile blkfront and blkback
xen/arm: compile netback
xen: update xen_add_to_physmap interface
arm/v2m: initialize arch_timers even if v2m_timer is not present
hvc_xen: allow dom0_write_console for HVM guests

arch/arm/Kconfig | 10 ++
arch/arm/Makefile | 1 +
arch/arm/include/asm/hypervisor.h | 6 +
arch/arm/include/asm/sync_bitops.h | 17 ++
arch/arm/include/asm/xen/hypercall.h | 69 ++++++++
arch/arm/include/asm/xen/hypervisor.h | 19 +++
arch/arm/include/asm/xen/interface.h | 66 ++++++++
arch/arm/include/asm/xen/page.h | 77 +++++++++
arch/arm/kernel/early_printk.c | 11 ++-
arch/arm/mach-vexpress/v2m.c | 11 +-
arch/arm/xen/Makefile | 1 +
arch/arm/xen/enlighten.c | 244 ++++++++++++++++++++++++++++
arch/arm/xen/grant-table.c | 53 ++++++
arch/arm/xen/hypercall.S | 65 ++++++++
arch/ia64/include/asm/xen/interface.h | 2 +-
arch/x86/include/asm/xen/interface.h | 2 +
arch/x86/xen/enlighten.c | 9 +
arch/x86/xen/irq.c | 1 +
arch/x86/xen/xen-ops.h | 1 -
drivers/block/xen-blkback/blkback.c | 1 +
drivers/net/xen-netback/netback.c | 1 +
drivers/net/xen-netfront.c | 1 +
drivers/tty/hvc/hvc_xen.c | 14 +-
drivers/xen/Makefile | 9 +-
drivers/xen/events.c | 18 ++-
drivers/xen/grant-table.c | 3 +-
drivers/xen/privcmd.c | 20 +--
drivers/xen/xenbus/xenbus_comms.c | 2 +-
drivers/xen/xenbus/xenbus_probe.c | 27 ++--
drivers/xen/xenbus/xenbus_probe_frontend.c | 1 +
drivers/xen/xenbus/xenbus_xs.c | 1 +
drivers/xen/xenfs/super.c | 7 +
include/xen/events.h | 2 +
include/xen/interface/features.h | 3 +
include/xen/interface/grant_table.h | 4 +-
include/xen/interface/io/protocols.h | 3 +
include/xen/interface/memory.h | 19 ++-
include/xen/interface/platform.h | 4 +-
include/xen/interface/xen.h | 9 +-
include/xen/privcmd.h | 3 +-
include/xen/xen.h | 4 +-
41 files changed, 763 insertions(+), 58 deletions(-)

A branch based on 3.5-rc7 is available here:

git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 3.5-rc7-arm-1

Cheers,

Stefano/*
* ARM Ltd. Versatile Express
*
* CoreTile Express A15x2 (version with Test Chip 1)
* Cortex-A15 MPCore (V2P-CA15)
*
* HBI-0237A
*/

/dts-v1/;

/ {
model = "V2P-CA15";
arm,hbi = <0x237>;
compatible = "arm,vexpress,v2p-ca15,tc1", "arm,vexpress,v2p-ca15", "arm,vexpress";

#address-cells = <1>;
#size-cells = <1>;

interrupt-parent = <&gic>;

chosen {
bootargs = "dom0_mem=128M";
xen,dom0-bootargs = "earlyprintk=xenboot console=ttyAMA1 root=/dev/mmcblk0 debug rw";
};

aliases {
serial0 = &v2m_serial0;
serial1 = &v2m_serial1;
serial2 = &v2m_serial2;
serial3 = &v2m_serial3;
i2c0 = &v2m_i2c_dvi;
i2c1 = &v2m_i2c_pcie;
};

cpus {
#address-cells = <1>;
#size-cells = <0>;

cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a15";
reg = <0>;
};
};

memory {
device_type = "memory";
reg = <0x80000000 0x80000000>;
};

gic: interrupt-controller@2c001000 {
compatible = "arm,cortex-a9-gic";
#interrupt-cells = <3>;
#address-cells = <0>;
interrupt-controller;
reg = <0x2c001000 0x1000>,
<0x2c002000 0x100>;
};

pmu {
compatible = "arm,cortex-a9-pmu";
interrupts = <0 68 4>,
<0 69 4>;
};

xen {
compatible = "arm,xen";
reg = <0xb0000000 0x20000>;
interrupts = <1 15 0xf08>;
};

motherboard {
ranges = <0 0 0x08000000 0x04000000>,
<1 0 0x14000000 0x04000000>,
<2 0 0x18000000 0x04000000>,
<3 0 0x1c000000 0x04000000>,
<4 0 0x0c000000 0x04000000>,
<5 0 0x10000000 0x04000000>;

interrupt-map-mask = <0 0 63>;
interrupt-map = <0 0 0 &gic 0 0 4>,
<0 0 1 &gic 0 1 4>,
<0 0 2 &gic 0 2 4>,
<0 0 3 &gic 0 3 4>,
<0 0 4 &gic 0 4 4>,
<0 0 5 &gic 0 5 4>,
<0 0 6 &gic 0 6 4>,
<0 0 7 &gic 0 7 4>,
<0 0 8 &gic 0 8 4>,
<0 0 9 &gic 0 9 4>,
<0 0 10 &gic 0 10 4>,
<0 0 11 &gic 0 11 4>,
<0 0 12 &gic 0 12 4>,
<0 0 13 &gic 0 13 4>,
<0 0 14 &gic 0 14 4>,
<0 0 15 &gic 0 15 4>,
<0 0 16 &gic 0 16 4>,
<0 0 17 &gic 0 17 4>,
<0 0 18 &gic 0 18 4>,
<0 0 19 &gic 0 19 4>,
<0 0 20 &gic 0 20 4>,
<0 0 21 &gic 0 21 4>,
<0 0 22 &gic 0 22 4>,
<0 0 23 &gic 0 23 4>,
<0 0 24 &gic 0 24 4>,
<0 0 25 &gic 0 25 4>,
<0 0 26 &gic 0 26 4>,
<0 0 27 &gic 0 27 4>,
<0 0 28 &gic 0 28 4>,
<0 0 29 &gic 0 29 4>,
<0 0 30 &gic 0 30 4>,
<0 0 31 &gic 0 31 4>,
<0 0 32 &gic 0 32 4>,
<0 0 33 &gic 0 33 4>,
<0 0 34 &gic 0 34 4>,
<0 0 35 &gic 0 35 4>,
<0 0 36 &gic 0 36 4>,
<0 0 37 &gic 0 37 4>,
<0 0 38 &gic 0 38 4>,
<0 0 39 &gic 0 39 4>,
<0 0 40 &gic 0 40 4>,
<0 0 41 &gic 0 41 4>,
<0 0 42 &gic 0 42 4>;
};
};

/include/ "vexpress-v2m-rs1-rtsm.dtsi"
/*
* ARM Ltd. Versatile Express
*
* ARM Envelope Model v7A (single CPU).
*/

/dts-v1/;

/include/ "skeleton.dtsi"

/ {
model = "V2P-AEMv7A";
compatible = "arm,vexpress,v2p-aem,v7a", "arm,vexpress,v2p-aem", "arm,vexpress";
interrupt-parent = <&gic>;

chosen {
bootargs = "earlyprintk=xen debug loglevel=9 console=hvc0 root=/dev/xvda";
};

cpus {
#address-cells = <1>;
#size-cells = <0>;

cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a15";
reg = <0>;
};
};

memory {
device_type = "memory";
reg = <0x80000000 0x08000000>;
};

gic: interrupt-controller@2c001000 {
compatible = "arm,cortex-a9-gic";
#interrupt-cells = <3>;
#address-cells = <0>;
interrupt-controller;
reg = <0x2c001000 0x1000>,
<0x2c002000 0x100>;
};

timer {
compatible = "arm,armv7-timer";
interrupts = <1 13 0xf08>,
<1 14 0xf08>,
<1 11 0xf08>,
<1 10 0xf08>;
};

xen {
compatible = "arm,xen";
reg = <0xb0000000 0x20000>;
interrupts = <1 15 0xf08>;
};

motherboard {
ranges = <0 0 0x08000000 0x04000000>,
<1 0 0x14000000 0x04000000>,
<2 0 0x18000000 0x04000000>,
<3 0 0x1c000000 0x04000000>,
<4 0 0x0c000000 0x04000000>,
<5 0 0x10000000 0x04000000>;

interrupt-map-mask = <0 0 63>;
interrupt-map = <0 0 0 &gic 0 0 4>,
<0 0 1 &gic 0 1 4>,
<0 0 2 &gic 0 2 4>,
<0 0 3 &gic 0 3 4>,
<0 0 4 &gic 0 4 4>,
<0 0 5 &gic 0 5 4>,
<0 0 6 &gic 0 6 4>,
<0 0 7 &gic 0 7 4>,
<0 0 8 &gic 0 8 4>,
<0 0 9 &gic 0 9 4>,
<0 0 10 &gic 0 10 4>,
<0 0 11 &gic 0 11 4>,
<0 0 12 &gic 0 12 4>,
<0 0 13 &gic 0 13 4>,
<0 0 14 &gic 0 14 4>,
<0 0 15 &gic 0 15 4>,
<0 0 16 &gic 0 16 4>,
<0 0 17 &gic 0 17 4>,
<0 0 18 &gic 0 18 4>,
<0 0 19 &gic 0 19 4>,
<0 0 20 &gic 0 20 4>,
<0 0 21 &gic 0 21 4>,
<0 0 22 &gic 0 22 4>,
<0 0 23 &gic 0 23 4>,
<0 0 24 &gic 0 24 4>,
<0 0 25 &gic 0 25 4>,
<0 0 26 &gic 0 26 4>,
<0 0 27 &gic 0 27 4>,
<0 0 28 &gic 0 28 4>,
<0 0 29 &gic 0 29 4>,
<0 0 30 &gic 0 30 4>,
<0 0 31 &gic 0 31 4>,
<0 0 32 &gic 0 32 4>,
<0 0 33 &gic 0 33 4>,
<0 0 34 &gic 0 34 4>,
<0 0 35 &gic 0 35 4>,
<0 0 36 &gic 0 36 4>,
<0 0 37 &gic 0 37 4>,
<0 0 38 &gic 0 38 4>,
<0 0 39 &gic 0 39 4>,
<0 0 40 &gic 0 40 4>,
<0 0 41 &gic 0 41 4>,
<0 0 42 &gic 0 42 4>;
};
};

/* /include/ "vexpress-v2m-rs1-rtsm.dtsi" */

Next message: Stefano Stabellini: "[PATCH 04/24] xen/arm: sync_bitops"
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