linux-kernel - [PATCH 6/6] perf amd ibs: Decode Streaming-store flag in IBS OP raw dump

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Message-ID: <20260119024328.897-7-ravi.bangoria@amd.com>
Date: Mon, 19 Jan 2026 02:43:27 +0000
From: Ravi Bangoria <ravi.bangoria@....com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>
CC: Ravi Bangoria <ravi.bangoria@....com>, Arnaldo Carvalho de Melo
	<acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Ian Rogers
	<irogers@...gle.com>, Dapeng Mi <dapeng1.mi@...ux.intel.com>, James Clark
	<james.clark@...aro.org>, <x86@...nel.org>,
	<linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Manali
 Shukla" <manali.shukla@....com>, Santosh Shukla <santosh.shukla@....com>,
	Ananth Narayan <ananth.narayan@....com>, Sandipan Das <sandipan.das@....com>
Subject: [PATCH 6/6] perf amd ibs: Decode Streaming-store flag in IBS OP raw dump

Newer AMD CPUs can tag IBS samples that originate from streaming-
store instruction. When the PMU advertises this feature, interpret
IBS_OP_DATA2[8] bit as the streaming store indicator and show
it in the raw dump output.

Signed-off-by: Ravi Bangoria <ravi.bangoria@....com>
---
 tools/perf/util/amd-sample-raw.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/amd-sample-raw.c b/tools/perf/util/amd-sample-raw.c
index 3e5530008b14..394c061fbeb3 100644
--- a/tools/perf/util/amd-sample-raw.c
+++ b/tools/perf/util/amd-sample-raw.c
@@ -22,6 +22,7 @@ static bool zen4_ibs_extensions;
 static bool ldlat_cap;
 static bool dtlb_pgsize_cap;
 static bool rmtsocket_cap;
+static bool strmst_cap;
 
 /*
  * Status fields of IBS_FETCH_CTL and IBS_FETCH_CTL_EXT are valid only if
@@ -166,12 +167,15 @@ static void pr_ibs_op_data2_extended(union ibs_op_data2 reg)
 	};
 	int data_src = (reg.data_src_hi << 3) | reg.data_src_lo;
 	char rmtsocket[sizeof("RmtSocket _ ")] = "";
+	char strmst[sizeof("StrmSt _ ")] = "";
 
 	if (rmtsocket_cap)
 		snprintf(rmtsocket, sizeof(rmtsocket), "RmtSocket %d ", reg.rmt_socket);
+	if (strmst_cap)
+		snprintf(strmst, sizeof(strmst), "StrmSt %d ", reg.strm_st);
 
-	printf("ibs_op_data2:\t%016llx %s%sRmtNode %d%s\n", reg.val,
-		rmtsocket,
+	printf("ibs_op_data2:\t%016llx %s%s%sRmtNode %d%s\n", reg.val,
+		rmtsocket, strmst,
 		(data_src == 1 || data_src == 2 || data_src == 5) ?
 			(reg.cache_hit_st ? "CacheHitSt 1=O-State " : "CacheHitSt 0=M-state ") : "",
 		reg.rmt_node,
@@ -191,12 +195,15 @@ static void pr_ibs_op_data2_default(union ibs_op_data2 reg)
 		" DataSrc 7=Other"
 	};
 	char rmtsocket[sizeof("RmtSocket _ ")] = "";
+	char strmst[sizeof("StrmSt _ ")] = "";
 
 	if (rmtsocket_cap)
 		snprintf(rmtsocket, sizeof(rmtsocket), "RmtSocket %d ", reg.rmt_socket);
+	if (strmst_cap)
+		snprintf(strmst, sizeof(strmst), "StrmSt %d ", reg.strm_st);
 
-	printf("ibs_op_data2:\t%016llx %s%sRmtNode %d%s\n", reg.val,
-	       rmtsocket,
+	printf("ibs_op_data2:\t%016llx %s%s%sRmtNode %d%s\n", reg.val,
+	       rmtsocket, strmst,
 	       reg.data_src_lo == 2 ? (reg.cache_hit_st ? "CacheHitSt 1=O-State "
 						     : "CacheHitSt 0=M-state ") : "",
 	       reg.rmt_node, data_src_str[reg.data_src_lo]);
@@ -443,6 +450,9 @@ bool evlist__has_amd_ibs(struct evlist *evlist)
 	if (perf_env__find_pmu_cap(env, "ibs_op", "rmtsocket"))
 		rmtsocket_cap = 1;
 
+	if (perf_env__find_pmu_cap(env, "ibs_op", "strmst"))
+		strmst_cap = 1;
+
 	if (ibs_fetch_type || ibs_op_type) {
 		if (!cpu_family)
 			parse_cpuid(env);
-- 
2.43.0