On Mon, May 29, 2017 at 10:41:17AM -0600, Mathieu Poirier wrote:

On 25 May 2017 at 09:57, Leo Yan [off-list ref] wrote:

quoted

ARMv8 architecture reference manual (ARM DDI 0487A.k) Chapter H7 "The
Sample-based Profiling Extension" has description for sampling
registers, we can utilize these registers to check program counter
value with combined CPU exception level, secure state, etc. So this is
helpful for CPU lockup bugs, e.g. if one CPU has run into infinite loop
with IRQ disabled; the 'hang' CPU cannot switch context and handle any
interrupt, so it cannot handle SMP call for stack dump, etc.

This patch series is to enable coresight debug module with sample-based
registers and register call back notifier for PCSR register dumping
when panic happens, so we can see below dumping info for panic; and
this patch series has considered the conditions for access permission
for debug registers self, so this can avoid access debug registers when
CPU power domain is off; the driver also try to figure out the CPU is
in secure or non-secure state.

I have queued patches 1 to 7 to my tree.  I can't do anything about
patches 8 and 9 because they haven't been ack'ed.  From here you can
either chase them to get an ACK or send a separate patch to them
directly.

Thanks a lot, Mathieu. I will ping Wei and Andy/David saperately.

Thanks,
Mathieu