linux-kernel - [PATCH 09/19] coresight: trbe: Add fault action argument to trbe_handle

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Message-Id: <20251201-trbe_buffer_refactor_v1-1-v1-9-7da32b076b28@arm.com>
Date: Mon, 01 Dec 2025 11:21:59 +0000
From: Leo Yan <leo.yan@....com>
To: Suzuki K Poulose <suzuki.poulose@....com>, 
 Mike Leach <mike.leach@...aro.org>, James Clark <james.clark@...aro.org>, 
 Anshuman Khandual <anshuman.khandual@....com>, 
 Yeoreum Yun <yeoreum.yun@....com>, Will Deacon <will@...nel.org>, 
 Mark Rutland <mark.rutland@....com>, Tamas Petz <tamas.petz@....com>, 
 Tamas Zsoldos <tamas.zsoldos@....com>, 
 Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>, 
 Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, 
 Leo Yan <leo.yan@....com>
Subject: [PATCH 09/19] coresight: trbe: Add fault action argument to
 trbe_handle_overflow()

Add a new argument to trbe_handle_overflow() for the fault action, which
is used to compare the wrap event for trace size calculation.

No functional change intended; this is preparation for a later update.

Signed-off-by: Leo Yan <leo.yan@....com>
---
 drivers/hwtracing/coresight/coresight-trbe.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 0caa4a6b437a3aa39fc6bcc72a23711b54f7c598..f56ecdeaa6596afb440e4d53732e08a85f9bf89d 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1078,14 +1078,15 @@ static void trbe_handle_spurious(struct perf_output_handle *handle)
 	set_trbe_enabled(buf->cpudata, trblimitr);
 }
 
-static int trbe_handle_overflow(struct perf_output_handle *handle)
+static int trbe_handle_overflow(struct perf_output_handle *handle,
+				enum trbe_fault_action act)
 {
 	struct perf_event *event = handle->event;
 	struct trbe_buf *buf = etm_perf_sink_config(handle);
 	unsigned long size;
 	struct etm_event_data *event_data;
 
-	size = trbe_get_trace_size(handle, buf, true);
+	size = trbe_get_trace_size(handle, buf, act == TRBE_FAULT_ACT_WRAP);
 	if (buf->snapshot)
 		handle->head += size;
 
@@ -1179,7 +1180,7 @@ static irqreturn_t arm_trbe_irq_handler(int irq, void *dev)
 
 	switch (act) {
 	case TRBE_FAULT_ACT_WRAP:
-		truncated = !!trbe_handle_overflow(handle);
+		truncated = !!trbe_handle_overflow(handle, act);
 		break;
 	case TRBE_FAULT_ACT_SPURIOUS:
 		trbe_handle_spurious(handle);

-- 
2.34.1