[Qemu-devel] [PATCH v4 0/2] ARM: add 'virt' platform

[Peter Maydell <peter.maydell@linaro.org>]

This patch series adds a 'virt' platform which uses the
kernel's mach-virt (fully device-tree driven) support
to create a simple minimalist platform intended for
use for KVM VM guests. It's based on John Rigby's
patches, but I've overhauled it a lot:

 * renamed user-facing machine to just "virt"
 * removed the A9 support (it can't work since the A9 has no
   generic timers)
 * added virtio-mmio transports instead of random set of 'soc' devices
 * instead of updating io_base as we step through adding devices,
   define a memory map with an array (similar to vexpress)
 * folded in some minor fixes from John's aarch64-support patch
 * rather than explicitly doing endian-swapping on FDT cells,
   use fdt APIs that let us just pass in host-endian values
   and let the fdt layer take care of the swapping
 * miscellaneous minor code cleanups and style fixes

If you want to test this with TCG QEMU you'll also need the
generic-timers implementation patches I posted recently.
A branch with generic-timers plus these patches is here:
https://git.linaro.org/gitweb?p=people/pmaydell/qemu-arm.git;a=shortlog;h=refs/heads/mach-virt

(The kernel in pure mach-virt mode requires generic timers;
it can't deal with getting its clock source from an sp804
timer specified by the device tree. This might be fixed in
a future kernel, but dropping all the soc-device support
from mach-virt makes it simpler anyway.)

An obvious thing this machine does not provide is a serial
port. I would rather just use virtio-console (and we
should implement the 'emergency console/earlyprintk' bit of
the virtio spec).

John Rigby (2):
  ARM: Allow boards to provide an fdt blob
  ARM: Add 'virt' platform

 hw/arm/Makefile.objs |    2 +-
 hw/arm/boot.c        |   32 +++--
 hw/arm/virt.c        |  363 ++++++++++++++++++++++++++++++++++++++++++++++++++
 include/hw/arm/arm.h |    7 +
 4 files changed, 391 insertions(+), 13 deletions(-)
 create mode 100644 hw/arm/virt.c

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1.7.9.5