Hello Miki,

On 14 October 2016 at 03:59, Miki Shifman <mikish@gmail.com> wrote:
> Hi Mathieu,
>
> I'm been reading your tutorials about CoreSight and they're all very
> interesting! I would appreciate your assistance with issues I have with it.
>
> I'm trying to learn how to use CoreSight, and currently I don't have an ARM
> board supporting it, so i'm attempting to build a linux on qemu to use your
> libraries.

I have never heard about Coresight IP blocks being emulated on qemu -
I'm not even sure it would be possible to do so.

>
> I've built linaro kernel 16.09 (latest) with CoreSight support. When I'm
> running qemu, I have sys/kernel/debug/coresight directory, but no devices in
> it, so I guess haven't been registered probably

Right, that's because coresight entries aren't in the DT and as I said
above, coresight blocks aren't emulated.

I've heard of people thinking about providing an emulation but that
would cause serious performance problems, at least from where I stand.

Your best bet is to get one of the 96 board development kit, the 410c
is probably best, and work with that.  Of all the boards available
it's likely the easiest to work with (note that I haven't tried
myself).  If you do end up acquiring a system Chunyan Zhang can help
you with the DT specification.

Best of luck,
Mathieu

>
> Is there any flag I should add to qemu execution to support CoreSight? maybe
> add some device?
>
> Thanking you in advance,
> Miki