linux-kernel - [PATCH v3 4/4] trace: platform/x86/intel/ifs: Add SBAF trace support

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Message-Id: <20240713004001.535159-5-sathyanarayanan.kuppuswamy@linux.intel.com>
Date: Sat, 13 Jul 2024 00:40:01 +0000
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
To: Jithu Joseph <jithu.joseph@...el.com>,
	Hans de Goede <hdegoede@...hat.com>,
	Ilpo Jarvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Ashok Raj <ashok.raj@...el.com>,
	Tony Luck <tony.luck@...el.com>,
	linux-trace-kernel@...r.kernel.org,
	platform-driver-x86@...r.kernel.org,
	Shankar Ravi V <ravi.v.shankar@...el.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 4/4] trace: platform/x86/intel/ifs: Add SBAF trace support

From: Jithu Joseph <jithu.joseph@...el.com>

Add tracing support for the SBAF IFS tests, which may be useful for
debugging systems that fail these tests. Log details like test content
batch number, SBAF bundle ID, program index and the exact errors or
warnings encountered by each HT thread during the test.

Reviewed-by: Ashok Raj <ashok.raj@...el.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@...dmis.org>
Signed-off-by: Jithu Joseph <jithu.joseph@...el.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
---
 include/trace/events/intel_ifs.h         | 27 ++++++++++++++++++++++++
 drivers/platform/x86/intel/ifs/runtest.c |  1 +
 2 files changed, 28 insertions(+)

diff --git a/include/trace/events/intel_ifs.h b/include/trace/events/intel_ifs.h
index 0d88ebf2c980..70323acde1de 100644
--- a/include/trace/events/intel_ifs.h
+++ b/include/trace/events/intel_ifs.h
@@ -35,6 +35,33 @@ TRACE_EVENT(ifs_status,
 		__entry->status)
 );
 
+TRACE_EVENT(ifs_sbaf,
+
+	TP_PROTO(int batch, union ifs_sbaf activate, union ifs_sbaf_status status),
+
+	TP_ARGS(batch, activate, status),
+
+	TP_STRUCT__entry(
+		__field(	u64,	status	)
+		__field(	int,	batch	)
+		__field(	u16,	bundle	)
+		__field(	u16,	pgm	)
+	),
+
+	TP_fast_assign(
+		__entry->status	= status.data;
+		__entry->batch	= batch;
+		__entry->bundle	= activate.bundle_idx;
+		__entry->pgm	= activate.pgm_idx;
+	),
+
+	TP_printk("batch: 0x%.2x, bundle_idx: 0x%.4x, pgm_idx: 0x%.4x, status: 0x%.16llx",
+		__entry->batch,
+		__entry->bundle,
+		__entry->pgm,
+		__entry->status)
+);
+
 #endif /* _TRACE_IFS_H */
 
 /* This part must be outside protection */
diff --git a/drivers/platform/x86/intel/ifs/runtest.c b/drivers/platform/x86/intel/ifs/runtest.c
index 2a37f009d0b3..7670fc89153d 100644
--- a/drivers/platform/x86/intel/ifs/runtest.c
+++ b/drivers/platform/x86/intel/ifs/runtest.c
@@ -528,6 +528,7 @@ static int dosbaf(void *data)
 	 */
 	wrmsrl(MSR_ACTIVATE_SBAF, run_params->activate->data);
 	rdmsrl(MSR_SBAF_STATUS, status.data);
+	trace_ifs_sbaf(ifsd->cur_batch, *run_params->activate, status);
 
 	/* Pass back the result of the test */
 	if (cpu == first)
-- 
2.25.1