On Tue, 29 Nov 2011, Arnd Bergmann wrote:

On Tuesday 29 November 2011, Stefano Stabellini wrote:

quoted

Hi all,
a few weeks ago I (and a few others) started hacking on a
proof-of-concept hypervisor port to Cortex-A15 which uses and requires
ARMv7 virtualization extensions. The intention of this work was to find
out how to best support ARM v7+ on Xen. See
http://old-list-archives.xen.org/archives/html/xen-arm/2011-09/msg00013.html
for more details. 

I am pleased to announce that significant progress has been made, and
that we now have a nascent Xen port for Cortex-A15. The port is based on
xen-unstable (HG CS 8d6edc3d26d2) and written from scratch exploiting
the latest virtualization, LPAE, GIC and generic timer support in
hardware.

Very nice!

Do you have a pointer to the kernel sources for the Linux guest?

We have very few changes to the Linux kernel at the moment (only 3
commits!), just enough to be able to issue hypercalls and start a PV
console.


A git branch is available here (not ready for submission):

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

the branch above is based on git://linux-arm.org/linux-2.6.git arm-lpae,
even though guests don't really need lpae support to run on Xen.

Since Xen and KVM are both in an early working state right now,
it would be very nice if we could agree on the guest model to make
sure that it's always possible to run the same kernel in both
(and potentially other future) hypervisors without modifications.

Yes, that would be ideal.
We don't plan on making many changes other than enabling PV frontends
and backends.