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(-)