QEMU basic support for Device Trees on ARM
Modify QEMU to support Device Trees on ARM. This will include at least being able to pass device trees to a kernel booted under QEMU, and updating the device tree based on other parameters passed to it. Building a model from a device tree is also desirable.
Blueprint information
- Status:
- Complete
- Approver:
- Michael Hope
- Priority:
- High
- Drafter:
- Dr. David Alan Gilbert
- Direction:
- Approved
- Assignee:
- Peter Maydell
- Definition:
- Approved
- Series goal:
- Accepted for trunk
- Implementation:
-
Implemented
- Milestone target:
-
2012.03
- Started by
- Peter Maydell
- Completed by
- Peter Maydell
Whiteboard
The basic support for passing a DTB to the kernel (using -dtb my.dtb) has now gone into qemu upstream and also qemu-linaro. Tested by booting using the vexpress dtb.
This blueprint add the initial support so the user can pass a Device Tree to the kernel from the QEMU command line, just like they can for a initrd.
It is assumed that the device tree is an output from the kernel build process.
Work Items
Work items:
Investigate device tree support on other architectures and figure out what can be shared: DONE
Find test kernel and device tree blob for vexpress: DONE
Add code to take blob, update it with memory etc, and pass to kernel: DONE
Clean up and submit patch upstream: DONE
Handle any patch review comments: DONE
Dependency tree
* Blueprints in grey have been implemented.
