Re: [Qemu-devel] [PATCH 0/6] add dumpdts ability to convert dtb to dts

[Peter Crosthwaite]

On Tue, Aug 26, 2014 at 12:04 PM, Li Liu <address@hidden> wrote:
>
>
> On 2014/8/25 20:22, Peter Maydell wrote:
>> On 25 August 2014 05:00, john.liuli <address@hidden> wrote:
>>> From: Li Liu <address@hidden>
>>>
>>> This patchset let qemu can convert dtb file to dts for two demands:
>>>
>>> Some archtectures may generate the dtb file dynamically through
>>> qemu device tree functions. So this let it's possiable to dump final
>>> dtb to dts and save it as a reference.
>>>
>>> For novices to debugging the issues caused by wrong dtb parameters.
>>> It will be easy to check the dts directly without copying the
>>> dtb which may be generated by 'dumpdtb' to the PC and dtc or fdtdump
>>> it.
>>>
>>> The outputed dts format is compatile with 'dtc -I dtb -O dts xxx.dtb'.
>>> There's a new parameter 'dumpdts' which is similar to 'dumpdtb'. so try
>>> it like '-machine dumpdts=/tmp/xxx.dts'.
>>
>> Hi. Thanks for this patchset, but I'm afraid this doesn't
>> seem to me like something that should be in QEMU.
>> As you say, you can easily turn the dtb blob into a source file
>> with dtc. That gets you a definitely-correct disassembly of the
>> blob, and we don't need to maintain a possibly-buggy
>> reimplementation of the dtb disassembler in QEMU.
>>

+1. With DTC source on-hand (in the submodule) it might be possible to
link the actual dtc dissassembler into QEMU, but I think external
scripting of the dtc tool is easiest.

Regards,
Peter

>> thanks
>> -- PMM
>>
>
> That makes sense. It's mostly used for debugging.
>
> Best regards
> Li.
>
>>
>
>