linux-kernel - [PATCH v3 0/2] Mesh PMU: Add tertiary match group support

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Date: Thu, 28 Mar 2024 18:32:13 -0700
From: Ilkka Koskinen <ilkka@...amperecomputing.com>
To: Robin Murphy <robin.murphy@....com>,
	Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Jing Zhang <renyu.zj@...ux.alibaba.com>,
	Ilkka Koskinen <ilkka@...amperecomputing.com>
Subject: [PATCH v3 0/2] Mesh PMU: Add tertiary match group support

Hopefully, I got it this time and the patchset starts to look better now...


v3:
	* Replaced wp_cfg in arm_cmn_hw_event with wp_idx that keeps
	  track, whether the event uses 0 or 1 index for the given direction
	* Cleaned and simplified allocation/claiming of wp config
	* arm_cmn_val_add_event() can't and won't fail anymore
	* Separated wp_combine from wp[] in event validation phase
	* use memset()/sizeof() when clearing an event
	* Still kept wp config allocator in separate functions - at least
	  for now

v2:
        * Wp config registers are allocated on node basis, instead
	  of using the same one globally
	* Use bitmap in the event structure to keep track on the
	  wp config registers assigned to the specific event.
	* The bitmap tracks only either UP (wp conf 0&1) or DOWN
	  (wp conf 2&3) registers.
	* Dropped the second patch
	  ("The patch set v2 is now in the internal mailing list")
	  as perf/sysfs doesn't really support items with the same
	  name even if visibility would handle them.
        * Addressed a bunch of other comments by the author
	* https://lore.kernel.org/all/20240307230929.6233-2-ilkka@os.amperecomputing.com/	 

v1:
	* https://lore.kernel.org/all/20240126221215.1537377-1-ilkka@os.amperecomputing.com/


Ilkka Koskinen (2):
  perf/arm-cmn: Decouple wp_config registers from filter group number
  perf/arm-cmn: Enable support for tertiary match group

 drivers/perf/arm-cmn.c | 116 +++++++++++++++++++++++++++++++++--------
 1 file changed, 93 insertions(+), 23 deletions(-)

-- 
2.43.0