[Qemu-devel] [PATCH v2 0/4] Allow sysbus devices to be attached via commandline

[Alistair Francis]

This patch allows sysbus devices to be attached via
command line arguments.

This can be used to build an entire machine from the command
line or to just add devices that aren't in the machine_init
code.

A peripheral can be added with the following syntax:
-device cadence_uart,addr=0xE0000000,irq=27

A CPU can be added with either of the following:
-device cpu,model=cortex-a9,type=arm-cpu,reset-cbar=0xF8F00000,midr=0x413       
 FC090
-sysbusdev device=cpu,name=microblaze-cp

RAM or ROM can be attached with this command:
-device memory,name=zynq.ext_ram,addr=0x00000000,size=0x8000000

Multiple IRQ lines can be used as well as multiple properties:
-device pl330,addr=0xF8003000,irq=13,irq=14,irq=15,irq=16,irq=17,\
irq=40,irq=41,irq=42,irq=43,num_chnls=8,num_periph_req=4,num_events=16

This implementation uses a three round multi-pass method. This will
hopefully allow devices attached via the command line to be connected
to other command line devices (I haven't managed to get that working
yet though)

With Li Guang's blob loader implemented it is also possible to boot
images while using "-M none".

V2:
Use -device to attach the devices (Thanks Markus Armbruster)
Make the method much more generic
Allow CPUs and Memory to be attached via command line
Allow properties to be passed in via the command line

Thanks to Markus Armbruster and Peter Crosthwaite for
feedback on the first version


Alistair Francis (4):
  qemu-option.c: Add qemu_opt functions that step over arguments
  qdev-monitor: Implement three functions used to connect devices
  vl.c: Enable adding devices to the system bus
  qemu-options.hx: Update the command line documentation for -device

 include/hw/boards.h       |    2 +
 include/monitor/qdev.h    |    3 +
 include/qemu/option.h     |    2 +
 include/qemu/option_int.h |    1 +
 qdev-monitor.c            |  237 ++++++++++++++++++++++++++++++++++++++++++++-
 qemu-options.hx           |    8 +-
 util/qemu-option.c        |   30 ++++++
 vl.c                      |   74 +++++++++++++-
 8 files changed, 346 insertions(+), 11 deletions(-)