Hey Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
stable/for-linus-3.7-arm-tag
which has the initial support for booting a Linux Xen guest under the
ARM (specifically ARMv7 with virtualized extensions).
The details of how to use/what it provides/etc are in the next paragraph.
There are going to be two merge conflicts. The first is in the
drivers/xen/Makefile and the resolution is to make dbgp.o be built on
dom0-$(CONFIG_USB_SUPPORT) += dbpg.o
option.
The second is that the arch/arm/mach-vexpress/Makefile.boot has been squashed
in arch/arm/boot/dts/Makefile, so the addition of xenvm-4.2.dtb should be
done in the newfile.
For your convenience, I''ve created a branch titled
''linux-next-resolution'' where
you can see how I resolved it.
http://git.kernel.org/?p=linux/kernel/git/konrad/xen.git;a=commitdiff;h=a7d7e57e1a0cae65f600306fe2fdf03b17582c22
The Xen-unstable hypervisor (so will be 4.3 in a ~6 months), supports ARMv7
platforms.
The goal in implementing this architecture is to exploit the hardware as much as
possible. That means use as little as possible of PV operations (so no PV MMU)
- and use existing PV drivers for I/Os (network, block, console, etc). This is
similar to how PVHVM guests operate in X86 platform nowadays - except that on
ARM there is no need for QEMU. The end result is that we share a lot of the
generic Xen drivers and infrastructure.
Details on how to compile/boot/etc are available at this Wiki:
http://wiki.xen.org/wiki/Xen_ARMv7_with_Virtualization_Extensions
and this blog has links to a technical discussion/presentations on the
overall architecture:
http://blog.xen.org/index.php/2012/09/21/xensummit-sessions-new-pvh-virtualisation-mode-for-arm-cortex-a15arm-servers-and-x86/
Documentation/devicetree/bindings/arm/xen.txt | 25 ++++
MAINTAINERS | 7 +
arch/arm/Kconfig | 10 ++
arch/arm/Makefile | 1 +
arch/arm/boot/dts/Makefile | 3 +-
arch/arm/boot/dts/xenvm-4.2.dts | 68 ++++++++++
arch/arm/include/asm/hypervisor.h | 6 +
arch/arm/include/asm/sync_bitops.h | 27 ++++
arch/arm/include/asm/xen/events.h | 18 +++
arch/arm/include/asm/xen/hypercall.h | 69 ++++++++++
arch/arm/include/asm/xen/hypervisor.h | 19 +++
arch/arm/include/asm/xen/interface.h | 73 +++++++++++
arch/arm/include/asm/xen/page.h | 82 ++++++++++++
arch/arm/mach-vexpress/v2m.c | 1 +
arch/arm/xen/Makefile | 1 +
arch/arm/xen/enlighten.c | 168 +++++++++++++++++++++++++
arch/arm/xen/grant-table.c | 53 ++++++++
arch/arm/xen/hypercall.S | 106 ++++++++++++++++
arch/ia64/include/asm/xen/interface.h | 1 +
arch/x86/include/asm/xen/interface.h | 1 +
arch/x86/xen/enlighten.c | 1 +
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/xen/Makefile | 14 ++-
drivers/xen/events.c | 14 ++-
include/xen/events.h | 2 +
include/xen/interface/features.h | 3 +
include/xen/interface/io/protocols.h | 3 +
include/xen/interface/memory.h | 12 +-
include/xen/interface/physdev.h | 2 +-
include/xen/interface/version.h | 2 +-
include/xen/xen.h | 4 +-
35 files changed, 783 insertions(+), 18 deletions(-)
Stefano Stabellini (21):
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
docs: Xen ARM DT bindings
xen/arm: Xen detection and shared_info page mapping
xen/arm: Introduce xen_ulong_t for unsigned long
xen: do not compile manage, balloon, pci, acpi, pcpu and cpu_hotplug on
ARM
xen/arm: introduce CONFIG_XEN on ARM
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/arm: compile blkfront and blkback
xen/arm: compile netback
MAINTAINERS: add myself as Xen ARM maintainer
arm: introduce a DTS for Xen unprivileged virtual machines
xen/Makefile: fix dom-y build
xen: mark xen_init_IRQ __init
xen/xen_initial_domain: check that xen_start_info is initialized