[PATCH v3 3/5] perf/tools: add support for PERF_SAMPLE_SKID_IP

[Stephane Eranian <eranian@google.com>]

This patch adds the support code to handle the PERF_SAMPLE_SKID_IP
record type. This is done as an event term and as such can be enabled
per event: cpu/event=xxx,skid-ip=1/. This is a boolean term which is
false by default.

Signed-off-by: Stephane Eranian <eranian@google.com>
---
 tools/include/uapi/linux/perf_event.h |  4 +++-
 tools/perf/util/event.h               |  1 +
 tools/perf/util/evsel.c               | 11 +++++++++++
 tools/perf/util/evsel.h               |  2 ++
 tools/perf/util/parse-events.c        |  7 +++++++
 tools/perf/util/parse-events.h        |  1 +
 tools/perf/util/parse-events.l        |  1 +
 tools/perf/util/session.c             |  3 +++
 8 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 362493a2f950..79655228dd9b 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -141,8 +141,9 @@ enum perf_event_sample_format {
 	PERF_SAMPLE_TRANSACTION			= 1U << 17,
 	PERF_SAMPLE_REGS_INTR			= 1U << 18,
 	PERF_SAMPLE_PHYS_ADDR			= 1U << 19,
+	PERF_SAMPLE_SKID_IP			= 1U << 20,
 
-	PERF_SAMPLE_MAX = 1U << 20,		/* non-ABI */
+	PERF_SAMPLE_MAX = 1U << 21,		/* non-ABI */
 };
 
 /*
@@ -817,6 +818,7 @@ enum perf_event_type {
 	 *	{ u64			abi; # enum perf_sample_regs_abi
 	 *	  u64			regs[weight(mask)]; } && PERF_SAMPLE_REGS_INTR
 	 *	{ u64			phys_addr;} && PERF_SAMPLE_PHYS_ADDR
+	 *	{ u64			skid_ip; } && PERF_SAMPLE_SKID_IP
 	 * };
 	 */
 	PERF_RECORD_SAMPLE			= 9,
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 1ae95efbfb95..41622a7ed649 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -202,6 +202,7 @@ struct perf_sample {
 	u32 raw_size;
 	u64 data_src;
 	u64 phys_addr;
+	u64 skid_ip;
 	u32 flags;
 	u16 insn_len;
 	u8  cpumode;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f894893c203d..679954ed2201 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -775,6 +775,10 @@ static void apply_config_terms(struct perf_evsel *evsel,
 		case PERF_EVSEL__CONFIG_TERM_OVERWRITE:
 			attr->write_backward = term->val.overwrite ? 1 : 0;
 			break;
+		case PERF_EVSEL__CONFIG_TERM_SKID_IP:
+			if (term->val.skid_ip)
+				perf_evsel__set_sample_bit(evsel, SKID_IP);
+			break;
 		default:
 			break;
 		}
@@ -1478,6 +1482,7 @@ static void __p_sample_type(char *buf, size_t size, u64 value)
 		bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
 		bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
 		bit_name(WEIGHT), bit_name(PHYS_ADDR),
+		bit_name(SKID_IP),
 		{ .name = NULL, }
 	};
 #undef bit_name
@@ -2225,6 +2230,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 		array++;
 	}
 
+	data->skid_ip = 0;
+	if (type & PERF_SAMPLE_SKID_IP) {
+		data->skid_ip = *array;
+		array++;
+	}
+
 	return 0;
 }
 
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 9277df96ffda..8555095f0d48 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -49,6 +49,7 @@ enum {
 	PERF_EVSEL__CONFIG_TERM_OVERWRITE,
 	PERF_EVSEL__CONFIG_TERM_DRV_CFG,
 	PERF_EVSEL__CONFIG_TERM_BRANCH,
+	PERF_EVSEL__CONFIG_TERM_SKID_IP,
 	PERF_EVSEL__CONFIG_TERM_MAX,
 };
 
@@ -66,6 +67,7 @@ struct perf_evsel_config_term {
 		bool	inherit;
 		bool	overwrite;
 		char	*branch;
+		bool	skid_ip;
 	} val;
 };
 
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a7fcd95961ef..1a1d9fc509bd 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -918,6 +918,7 @@ static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
 	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
 	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
+	[PARSE_EVENTS__TERM_TYPE_SKID_IP]		= "skid-ip",
 };
 
 static bool config_term_shrinked;
@@ -1026,6 +1027,9 @@ do {									   \
 	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
 		CHECK_TYPE_VAL(NUM);
 		break;
+	case PARSE_EVENTS__TERM_TYPE_SKID_IP:
+		CHECK_TYPE_VAL(NUM);
+		break;
 	default:
 		err->str = strdup("unknown term");
 		err->idx = term->err_term;
@@ -1159,6 +1163,9 @@ do {								\
 		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
 			ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
 			break;
+		case PARSE_EVENTS__TERM_TYPE_SKID_IP:
+			ADD_CONFIG_TERM(SKID_IP, skid_ip, term->val.num ? 1 : 0);
+			break;
 		default:
 			break;
 		}
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index be337c266697..d331f078a389 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -74,6 +74,7 @@ enum {
 	PARSE_EVENTS__TERM_TYPE_NOOVERWRITE,
 	PARSE_EVENTS__TERM_TYPE_OVERWRITE,
 	PARSE_EVENTS__TERM_TYPE_DRV_CFG,
+	PARSE_EVENTS__TERM_TYPE_SKID_IP,
 	__PARSE_EVENTS__TERM_TYPE_NR,
 };
 
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 241396cd059d..383443f4fe0d 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -257,6 +257,7 @@ inherit			{ return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
 no-inherit		{ return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
 overwrite		{ return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
 no-overwrite		{ return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
+skid-ip			{ return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SKID_IP); }
 ,			{ return ','; }
 "/"			{ BEGIN(INITIAL); return '/'; }
 {name_minus}		{ return str(yyscanner, PE_NAME); }
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 5c412310f266..223165055d41 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1131,6 +1131,9 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 
 	if (sample_type & PERF_SAMPLE_READ)
 		sample_read__printf(sample, evsel->attr.read_format);
+
+	if (sample_type & PERF_SAMPLE_SKID_IP)
+		printf("... skid_ip: %" PRIu64 "\n", sample->skid_ip);
 }
 
 static void dump_read(struct perf_evsel *evsel, union perf_event *event)
-- 
2.7.4