[Qemu-devel] [PATCH v4 0/6] machvirt dynamic sysbus device instantiation

[Eric Auger]

This patch series enables machvirt to dynamically instantiate sysbus
devices from command line (using -device option).

All those sysbus devices are plugged onto a platform bus. This latter
device is instantiated in machvirt and takes care of the binding of
children sysbus devices on a machine init done notifier. The device
tree node generation for children dynamic sysbus device also happens
on a subsequent notifier that must be executed after the above one.
machvirt registers that notifier before the platform bus creation to
make sure notifiers are executed in the right order: dt generation
after actual QOM binding.

Very few sysbus devices are supposed to be instantiated that way.
VFIO devices belong to them.

Node creation really is architecture specific. On ARM the dynamic
sysbus device node creation is implemented in a new C module,
hw/arm/sysbus-fdt.c and not in the machine file.

This series applies on top of Alex Graf's series
[PATCH v3 0/7] Dynamic sysbus device allocation support
http://lists.nongnu.org/archive/html/qemu-devel/2014-09/msg04860.html

Machvirt transformations and sysbus-fdt are largely inspired from Alex work.

The patch series can be found at:
http://git.linaro.org/people/eric.auger/qemu.git (branch vfio_integ_v7)

Best Regards

Eric

v3 -> v4:
- dyn_sysbus_binding removed since binding stuff now are implemented by
  the platform bus device
- due to a change in ARM load_dtb implementation using rom_add_blob_fixed,
  the dt no more is generated in a reset notifier but is generated on a
  machine init done notifier
- the augmented device tree is not generated from scratch anymore but is
  added using a modify_dtb function. This required some small change in
  boot.c
- the case where the user provides a dtb file now is handled
- some cleanup in virt additions
- implement a list of dyanmically instantiable devices in sysbus-fdt

v2 -> v3:
- patch now applies on top of Alex full patchset
- dyn_sysbus_devtree: add arm_prefix to emphasize the fact those
  functions are arm specific; arm_sysbus_device_create_devtree
  becomes static
- load_dtb renamed into arm_load_dtb
- add copyright in hw/arm/dyn_sysbus_devtree.c

v1 -> v2:
- device node generation no more in sysbus device but in
  dyn_sysbus_devtree
- VFIO region shrinked to 4MB and relocated in machvirt to avoid PCI
  shrink (dynamic vfio-mmio support might come latter)
- platform_bus_base removed from PlatformDevtreeData

Eric Auger (6):
  hw/arm/boot: load_dtb becomes non static arm_load_dtb
  hw/arm/boot: dtb start and limit moved in arm_boot_info
  hw/arm/boot: do not free VirtBoardInfo fdt in arm_load_dtb
  hw/arm: add a new modify_dtb_opaque field in arm_boot_info
  hw/arm/sysbus-fdt: helpers for platform bus nodes addition
  hw/arm/virt: add dynamic sysbus device support

 hw/arm/Makefile.objs        |   1 +
 hw/arm/boot.c               |  48 +++++++-----
 hw/arm/sysbus-fdt.c         | 181 ++++++++++++++++++++++++++++++++++++++++++++
 hw/arm/virt.c               |  59 +++++++++++++++
 include/hw/arm/arm.h        |   7 ++
 include/hw/arm/sysbus-fdt.h |  50 ++++++++++++
 6 files changed, 326 insertions(+), 20 deletions(-)
 create mode 100644 hw/arm/sysbus-fdt.c
 create mode 100644 include/hw/arm/sysbus-fdt.h

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1.8.3.2