perf/arm-cmn: Move DTM index data out of hw_perf_event

Browse source

The amount of data we need to store all the per-DTM counter and
watchpoint allocations is already testing the limits of hw_perf_event,
and future CMNs are only likely to keep growing larger, so move these
arrays out to separate memory allocations. As part of that we can use
an explicit union for allocating cycle counters to dtc_cycles events,
which is arguably nicer anyway.

Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

...

This commit is contained in:

Robin Murphy 2026-06-30 14:01:17 +01:00 • committed by Will Deacon

parent a13c140cc2

commit 56603c28d9

1 changed files with 61 additions and 30 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

91

drivers/perf/arm-cmn.c

View file