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Subject[tip:perf/core] perf cs-etm: Introducing function cs_etm__init_trace_params()
Commit-ID:  2507a3d982f2968168b53f4d1e67774d68f79b0c
Gitweb: https://git.kernel.org/tip/2507a3d982f2968168b53f4d1e67774d68f79b0c
Author: Mathieu Poirier <mathieu.poirier@linaro.org>
AuthorDate: Tue, 12 Feb 2019 10:16:11 -0700
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 14 Feb 2019 15:18:06 -0300

perf cs-etm: Introducing function cs_etm__init_trace_params()

The trace parameter initialisation code is repeated in two different
places, something that bloats the file and can lead to errors. This
is fixed by introducing a helper function and calling the right
protocol initialisation code when required.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190212171618.25355-7-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/cs-etm.c | 112 +++++++++++++++++++++++------------------------
tools/perf/util/cs-etm.h | 4 +-
2 files changed, 58 insertions(+), 58 deletions(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index aac07f950074..f3a6dfaf3026 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -136,6 +136,57 @@ static void cs_etm__packet_dump(const char *pkt_string)
fflush(stdout);
}

+static void cs_etm__set_trace_param_etmv3(struct cs_etm_trace_params *t_params,
+ struct cs_etm_auxtrace *etm, int idx,
+ u32 etmidr)
+{
+ u64 **metadata = etm->metadata;
+
+ t_params[idx].protocol = cs_etm__get_v7_protocol_version(etmidr);
+ t_params[idx].etmv3.reg_ctrl = metadata[idx][CS_ETM_ETMCR];
+ t_params[idx].etmv3.reg_trc_id = metadata[idx][CS_ETM_ETMTRACEIDR];
+}
+
+static void cs_etm__set_trace_param_etmv4(struct cs_etm_trace_params *t_params,
+ struct cs_etm_auxtrace *etm, int idx)
+{
+ u64 **metadata = etm->metadata;
+
+ t_params[idx].protocol = CS_ETM_PROTO_ETMV4i;
+ t_params[idx].etmv4.reg_idr0 = metadata[idx][CS_ETMV4_TRCIDR0];
+ t_params[idx].etmv4.reg_idr1 = metadata[idx][CS_ETMV4_TRCIDR1];
+ t_params[idx].etmv4.reg_idr2 = metadata[idx][CS_ETMV4_TRCIDR2];
+ t_params[idx].etmv4.reg_idr8 = metadata[idx][CS_ETMV4_TRCIDR8];
+ t_params[idx].etmv4.reg_configr = metadata[idx][CS_ETMV4_TRCCONFIGR];
+ t_params[idx].etmv4.reg_traceidr = metadata[idx][CS_ETMV4_TRCTRACEIDR];
+}
+
+static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params,
+ struct cs_etm_auxtrace *etm)
+{
+ int i;
+ u32 etmidr;
+ u64 architecture;
+
+ for (i = 0; i < etm->num_cpu; i++) {
+ architecture = etm->metadata[i][CS_ETM_MAGIC];
+
+ switch (architecture) {
+ case __perf_cs_etmv3_magic:
+ etmidr = etm->metadata[i][CS_ETM_ETMIDR];
+ cs_etm__set_trace_param_etmv3(t_params, etm, i, etmidr);
+ break;
+ case __perf_cs_etmv4_magic:
+ cs_etm__set_trace_param_etmv4(t_params, etm, i);
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int cs_etm__init_decoder_params(struct cs_etm_decoder_params *d_params,
struct cs_etm_queue *etmq,
enum cs_etm_decoder_operation mode)
@@ -161,7 +212,7 @@ out:
static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
struct auxtrace_buffer *buffer)
{
- int i, ret;
+ int ret;
const char *color = PERF_COLOR_BLUE;
struct cs_etm_decoder_params d_params;
struct cs_etm_trace_params *t_params;
@@ -179,33 +230,8 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
if (!t_params)
return;

- for (i = 0; i < etm->num_cpu; i++) {
- if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) {
- u32 etmidr = etm->metadata[i][CS_ETM_ETMIDR];
-
- t_params[i].protocol =
- cs_etm__get_v7_protocol_version(etmidr);
- t_params[i].etmv3.reg_ctrl =
- etm->metadata[i][CS_ETM_ETMCR];
- t_params[i].etmv3.reg_trc_id =
- etm->metadata[i][CS_ETM_ETMTRACEIDR];
- } else if (etm->metadata[i][CS_ETM_MAGIC] ==
- __perf_cs_etmv4_magic) {
- t_params[i].protocol = CS_ETM_PROTO_ETMV4i;
- t_params[i].etmv4.reg_idr0 =
- etm->metadata[i][CS_ETMV4_TRCIDR0];
- t_params[i].etmv4.reg_idr1 =
- etm->metadata[i][CS_ETMV4_TRCIDR1];
- t_params[i].etmv4.reg_idr2 =
- etm->metadata[i][CS_ETMV4_TRCIDR2];
- t_params[i].etmv4.reg_idr8 =
- etm->metadata[i][CS_ETMV4_TRCIDR8];
- t_params[i].etmv4.reg_configr =
- etm->metadata[i][CS_ETMV4_TRCCONFIGR];
- t_params[i].etmv4.reg_traceidr =
- etm->metadata[i][CS_ETMV4_TRCTRACEIDR];
- }
- }
+ if (cs_etm__init_trace_params(t_params, etm))
+ goto out_free;

/* Set decoder parameters to simply print the trace packets */
if (cs_etm__init_decoder_params(&d_params, NULL,
@@ -382,7 +408,6 @@ static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u64 address,
static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
unsigned int queue_nr)
{
- int i;
struct cs_etm_decoder_params d_params;
struct cs_etm_trace_params *t_params = NULL;
struct cs_etm_queue *etmq;
@@ -431,33 +456,8 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
if (!t_params)
goto out_free;

- for (i = 0; i < etm->num_cpu; i++) {
- if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) {
- u32 etmidr = etm->metadata[i][CS_ETM_ETMIDR];
-
- t_params[i].protocol =
- cs_etm__get_v7_protocol_version(etmidr);
- t_params[i].etmv3.reg_ctrl =
- etm->metadata[i][CS_ETM_ETMCR];
- t_params[i].etmv3.reg_trc_id =
- etm->metadata[i][CS_ETM_ETMTRACEIDR];
- } else if (etm->metadata[i][CS_ETM_MAGIC] ==
- __perf_cs_etmv4_magic) {
- t_params[i].protocol = CS_ETM_PROTO_ETMV4i;
- t_params[i].etmv4.reg_idr0 =
- etm->metadata[i][CS_ETMV4_TRCIDR0];
- t_params[i].etmv4.reg_idr1 =
- etm->metadata[i][CS_ETMV4_TRCIDR1];
- t_params[i].etmv4.reg_idr2 =
- etm->metadata[i][CS_ETMV4_TRCIDR2];
- t_params[i].etmv4.reg_idr8 =
- etm->metadata[i][CS_ETMV4_TRCIDR8];
- t_params[i].etmv4.reg_configr =
- etm->metadata[i][CS_ETMV4_TRCCONFIGR];
- t_params[i].etmv4.reg_traceidr =
- etm->metadata[i][CS_ETMV4_TRCTRACEIDR];
- }
- }
+ if (cs_etm__init_trace_params(t_params, etm))
+ goto out_free;

/* Set decoder parameters to simply print the trace packets */
if (cs_etm__init_decoder_params(&d_params, etmq,
diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h
index d76126e0e3d0..0e97c196147a 100644
--- a/tools/perf/util/cs-etm.h
+++ b/tools/perf/util/cs-etm.h
@@ -105,8 +105,8 @@ struct intlist *traceid_list;

#define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_0_MAX * sizeof(u64))

-static const u64 __perf_cs_etmv3_magic = 0x3030303030303030ULL;
-static const u64 __perf_cs_etmv4_magic = 0x4040404040404040ULL;
+#define __perf_cs_etmv3_magic 0x3030303030303030ULL
+#define __perf_cs_etmv4_magic 0x4040404040404040ULL
#define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64))
#define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64))

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