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Subject[PATCH 1/3] perf auxtrace: Support for perf report -D for s390
Date
Add initial support for s390 auxiliary traces using the
CPU-Measurement Sampling Facility.

Support and ignore PERF_REPORT_AUXTRACE_INFO records
in the perf data file. Later patches will show the contents
of the auxiliary traces.

Setup the auxtrace queues and data structures for s390.
A raw dump of the perf.data file now does not show
an error when an auxtrace event is encountered.

Output before:
[root@s35lp76 perf]# ./perf report -D -i perf.data.auxtrace
0x128 [0x10]: failed to process type: 70
Error:
failed to process sample

0x128 [0x10]: event: 70
.
. ... raw event: size 16 bytes
. 0000: 00 00 00 46 00 00 00 10 00 00 00 00 00 00 00 00 ...F............

0x128 [0x10]: PERF_RECORD_AUXTRACE_INFO type: 0
[root@s35lp76 perf]#

Output after:
# ./perf report -D -i perf.data.auxtrace |fgrep PERF_RECORD_AUXTRACE
0 0 0x128 [0x10]: PERF_RECORD_AUXTRACE_INFO type: 5
0 0 0x25a66 [0x30]: PERF_RECORD_AUXTRACE size: 0x40000
offset: 0 ref: 0 idx: 4 tid: -1 cpu: 4
....

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
---
tools/perf/arch/s390/util/auxtrace.c | 1 +
tools/perf/util/Build | 1 +
tools/perf/util/auxtrace.c | 3 +
tools/perf/util/auxtrace.h | 1 +
tools/perf/util/s390-cpumsf.c | 123 +++++++++++++++++++++++++++
tools/perf/util/s390-cpumsf.h | 21 +++++
6 files changed, 150 insertions(+)
create mode 100644 tools/perf/util/s390-cpumsf.c
create mode 100644 tools/perf/util/s390-cpumsf.h

diff --git a/tools/perf/arch/s390/util/auxtrace.c b/tools/perf/arch/s390/util/auxtrace.c
index 3afe8256eff2..44c857388897 100644
--- a/tools/perf/arch/s390/util/auxtrace.c
+++ b/tools/perf/arch/s390/util/auxtrace.c
@@ -30,6 +30,7 @@ cpumsf_info_fill(struct auxtrace_record *itr __maybe_unused,
struct auxtrace_info_event *auxtrace_info __maybe_unused,
size_t priv_size __maybe_unused)
{
+ auxtrace_info->type = PERF_AUXTRACE_S390_CPUMSF;
return 0;
}

diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index b604ef334dc9..7efe15b9618d 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -87,6 +87,7 @@ libperf-$(CONFIG_AUXTRACE) += intel-pt.o
libperf-$(CONFIG_AUXTRACE) += intel-bts.o
libperf-$(CONFIG_AUXTRACE) += arm-spe.o
libperf-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o
+libperf-$(CONFIG_AUXTRACE) += s390-cpumsf.o

ifdef CONFIG_LIBOPENCSD
libperf-$(CONFIG_AUXTRACE) += cs-etm.o
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index d056447520a2..ae8c37b219c9 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -56,6 +56,7 @@
#include "intel-pt.h"
#include "intel-bts.h"
#include "arm-spe.h"
+#include "s390-cpumsf.h"

#include "sane_ctype.h"
#include "symbol/kallsyms.h"
@@ -920,6 +921,8 @@ int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused,
return arm_spe_process_auxtrace_info(event, session);
case PERF_AUXTRACE_CS_ETM:
return cs_etm__process_auxtrace_info(event, session);
+ case PERF_AUXTRACE_S390_CPUMSF:
+ return s390_cpumsf_process_auxtrace_info(event, session);
case PERF_AUXTRACE_UNKNOWN:
default:
return -EINVAL;
diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h
index e731f55da072..71fc3bd74299 100644
--- a/tools/perf/util/auxtrace.h
+++ b/tools/perf/util/auxtrace.h
@@ -44,6 +44,7 @@ enum auxtrace_type {
PERF_AUXTRACE_INTEL_BTS,
PERF_AUXTRACE_CS_ETM,
PERF_AUXTRACE_ARM_SPE,
+ PERF_AUXTRACE_S390_CPUMSF,
};

enum itrace_period_type {
diff --git a/tools/perf/util/s390-cpumsf.c b/tools/perf/util/s390-cpumsf.c
new file mode 100644
index 000000000000..e9a5ea21dbbf
--- /dev/null
+++ b/tools/perf/util/s390-cpumsf.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2018
+ * Auxtrace support for s390 CPU-Measurement Sampling Facility
+ *
+ * Author(s): Thomas Richter <tmricht@linux.ibm.com>
+ */
+
+#include <endian.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <inttypes.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/log2.h>
+
+#include "cpumap.h"
+#include "color.h"
+#include "evsel.h"
+#include "evlist.h"
+#include "machine.h"
+#include "session.h"
+#include "util.h"
+#include "thread.h"
+#include "debug.h"
+#include "auxtrace.h"
+#include "s390-cpumsf.h"
+
+struct s390_cpumsf {
+ struct auxtrace auxtrace;
+ struct auxtrace_queues queues;
+ struct auxtrace_heap heap;
+ struct perf_session *session;
+ struct machine *machine;
+ u32 auxtrace_type;
+ u32 pmu_type;
+};
+
+static int
+s390_cpumsf_process_event(struct perf_session *session __maybe_unused,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ struct perf_tool *tool __maybe_unused)
+{
+ return 0;
+}
+
+static int
+s390_cpumsf_process_auxtrace_event(struct perf_session *session __maybe_unused,
+ union perf_event *event __maybe_unused,
+ struct perf_tool *tool __maybe_unused)
+{
+ return 0;
+}
+
+static int s390_cpumsf_flush(struct perf_session *session __maybe_unused,
+ struct perf_tool *tool __maybe_unused)
+{
+ return 0;
+}
+
+static void s390_cpumsf_free_events(struct perf_session *session)
+{
+ struct s390_cpumsf *sf = container_of(session->auxtrace,
+ struct s390_cpumsf,
+ auxtrace);
+ struct auxtrace_queues *queues = &sf->queues;
+ unsigned int i;
+
+ for (i = 0; i < queues->nr_queues; i++)
+ zfree(&queues->queue_array[i].priv);
+ auxtrace_queues__free(queues);
+}
+
+static void s390_cpumsf_free(struct perf_session *session)
+{
+ struct s390_cpumsf *sf = container_of(session->auxtrace,
+ struct s390_cpumsf,
+ auxtrace);
+
+ auxtrace_heap__free(&sf->heap);
+ s390_cpumsf_free_events(session);
+ session->auxtrace = NULL;
+ free(sf);
+}
+
+int s390_cpumsf_process_auxtrace_info(union perf_event *event,
+ struct perf_session *session)
+{
+ struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
+ struct s390_cpumsf *sf;
+ int err;
+
+ if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event))
+ return -EINVAL;
+
+ sf = zalloc(sizeof(struct s390_cpumsf));
+ if (sf == NULL)
+ return -ENOMEM;
+
+ err = auxtrace_queues__init(&sf->queues);
+ if (err)
+ goto err_free;
+
+ sf->session = session;
+ sf->machine = &session->machines.host; /* No kvm support */
+ sf->auxtrace_type = auxtrace_info->type;
+ sf->pmu_type = PERF_TYPE_RAW;
+
+ sf->auxtrace.process_event = s390_cpumsf_process_event;
+ sf->auxtrace.process_auxtrace_event = s390_cpumsf_process_auxtrace_event;
+ sf->auxtrace.flush_events = s390_cpumsf_flush;
+ sf->auxtrace.free_events = s390_cpumsf_free_events;
+ sf->auxtrace.free = s390_cpumsf_free;
+ session->auxtrace = &sf->auxtrace;
+
+ return 0;
+
+err_free:
+ free(sf);
+ return err;
+}
diff --git a/tools/perf/util/s390-cpumsf.h b/tools/perf/util/s390-cpumsf.h
new file mode 100644
index 000000000000..fb64d100555c
--- /dev/null
+++ b/tools/perf/util/s390-cpumsf.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2018
+ * Auxtrace support for s390 CPU-Measurement Sampling Facility
+ *
+ * Author(s): Thomas Richter <tmricht@linux.ibm.com>
+ */
+
+#ifndef INCLUDE__PERF_S390_CPUMSF_H
+#define INCLUDE__PERF_S390_CPUMSF_H
+
+union perf_event;
+struct perf_session;
+struct perf_pmu;
+
+struct auxtrace_record *
+s390_cpumsf_recording_init(int *err, struct perf_pmu *s390_cpumsf_pmu);
+
+int s390_cpumsf_process_auxtrace_info(union perf_event *event,
+ struct perf_session *session);
+#endif
--
2.17.0
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