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authorMathieu Poirier <mathieu.poirier@linaro.org>2019-04-25 13:53:03 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-25 22:00:17 +0200
commite553a8aef4c300530844fe096c10975548ea26cb (patch)
tree3c193b3098fe1a293f14559d4feadd7b66ef60b4 /drivers/hwtracing
parent855ab61c16bf70b646fa9c84e7b07d14a003cd42 (diff)
coresight: tmc-etr: Create per-thread buffer allocation function
Buffer allocation is different when dealing with per-thread and CPU-wide sessions. In preparation to support CPU-wide trace scenarios simplify things by keeping allocation functions for both type separate. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Tested-by: Leo Yan <leo.yan@linaro.org> Tested-by: Robert Walker <robert.walker@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-tmc-etr.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index e1d2128ee757..bca1b2d9ef2e 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -1207,6 +1207,33 @@ done:
return etr_buf;
}
+static struct etr_buf *
+get_perf_etr_buf_per_thread(struct tmc_drvdata *drvdata,
+ struct perf_event *event, int nr_pages,
+ void **pages, bool snapshot)
+{
+ struct etr_buf *etr_buf;
+
+ /*
+ * In per-thread mode the etr_buf isn't shared, so just go ahead
+ * with memory allocation.
+ */
+ etr_buf = alloc_etr_buf(drvdata, event, nr_pages, pages, snapshot);
+
+ return etr_buf;
+}
+
+static struct etr_buf *
+get_perf_etr_buf(struct tmc_drvdata *drvdata, struct perf_event *event,
+ int nr_pages, void **pages, bool snapshot)
+{
+ if (event->cpu == -1)
+ return get_perf_etr_buf_per_thread(drvdata, event, nr_pages,
+ pages, snapshot);
+
+ return ERR_PTR(-ENOENT);
+}
+
static struct etr_perf_buffer *
tmc_etr_setup_perf_buf(struct tmc_drvdata *drvdata, struct perf_event *event,
int nr_pages, void **pages, bool snapshot)
@@ -1223,7 +1250,7 @@ tmc_etr_setup_perf_buf(struct tmc_drvdata *drvdata, struct perf_event *event,
if (!etr_perf)
return ERR_PTR(-ENOMEM);
- etr_buf = alloc_etr_buf(drvdata, event, nr_pages, pages, snapshot);
+ etr_buf = get_perf_etr_buf(drvdata, event, nr_pages, pages, snapshot);
if (!IS_ERR(etr_buf))
goto done;