coresight: etm-perf: configuring filters from perf core

This patch implements the required API needed to access
and retrieve range and start/stop filters from the perf core.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/drivers/hwtracing/coresight/coresight-etm-perf.h
index 87f5a134eb6f..3ffc9feb2d64 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.h
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.h
@@ -18,8 +18,42 @@
 #ifndef _CORESIGHT_ETM_PERF_H
 #define _CORESIGHT_ETM_PERF_H
 
+#include "coresight-priv.h"
+
 struct coresight_device;
 
+/*
+ * In both ETMv3 and v4 the maximum number of address comparator implentable
+ * is 8.  The actual number is implementation specific and will be checked
+ * when filters are applied.
+ */
+#define ETM_ADDR_CMP_MAX	8
+
+/**
+ * struct etm_filter - single instruction range or start/stop configuration.
+ * @start_addr:	The address to start tracing on.
+ * @stop_addr:	The address to stop tracing on.
+ * @type:	Is this a range or start/stop filter.
+ */
+struct etm_filter {
+	unsigned long start_addr;
+	unsigned long stop_addr;
+	enum etm_addr_type type;
+};
+
+/**
+ * struct etm_filters - set of filters for a session
+ * @etm_filter:	All the filters for this session.
+ * @nr_filters:	Number of filters
+ * @ssstatus:	Status of the start/stop logic.
+ */
+struct etm_filters {
+	struct etm_filter	etm_filter[ETM_ADDR_CMP_MAX];
+	unsigned int		nr_filters;
+	bool			ssstatus;
+};
+
+
 #ifdef CONFIG_CORESIGHT
 int etm_perf_symlink(struct coresight_device *csdev, bool link);