[PATCH 00/17] coresight: next v4.12-rc4

On 14/06/17 07:22, Leo Yan wrote:

Hi Kim,

On Tue, Jun 13, 2017 at 04:17:12PM -0500, Kim Phillips wrote:

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Also, do the current juno platforms not have CPU debug modules?  I'd
like to test the new driver.

By all means - Leo pointed out the patch adding the CPU debug entries in
the DT  file for Juno.

Thanks, I applied it, was able to
toggle /sys/kernel/debug/coresight_cpu_debug/enable, but wasn't sure
how to trigger the cpu debug output...

You could trigger panic flow with command, then can see CPU debug output:
echo c > /proc/sysrq-trigger

I think, may be we should provide a handle to trigger the CPU debug dump
manually, rather than using it only for panic. Something like :

echo 1 > /sys/kernel/debug/coresight_cpu_debug/trigger

Thoughts ?

Suzuki