[PATCH 2/2] coresight: etm-perf: Add AUX_NON_CONTIGUOUS_PAGES to cs_etm PMU

[Yabin Cui]

The cs_etm PMU, regardless of the underlying trace sink (ETF, ETR or
TRBE), doesn't require contiguous pages for its AUX buffer.

This patch adds the PERF_PMU_CAP_AUX_NON_CONTIGUOUS_PAGES capability
to the cs_etm PMU. This allows the kernel to allocate non-contiguous
pages for the AUX buffer, reducing memory fragmentation when using
cs_etm.

Signed-off-by: Yabin Cui <yabinc at google.com>
---
 drivers/hwtracing/coresight/coresight-etm-perf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index f4cccd68e625..c98646eca7f8 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -899,7 +899,8 @@ int __init etm_perf_init(void)
 	int ret;
 
 	etm_pmu.capabilities		= (PERF_PMU_CAP_EXCLUSIVE |
-					   PERF_PMU_CAP_ITRACE);
+					   PERF_PMU_CAP_ITRACE |
+					   PERF_PMU_CAP_AUX_NON_CONTIGUOUS_PAGES);
 
 	etm_pmu.attr_groups		= etm_pmu_attr_groups;
 	etm_pmu.task_ctx_nr		= perf_sw_context;
-- 
2.49.0.805.g082f7c87e0-goog