linux-kernel - [PATCH V6 8/8] perf/tools: Add PERF_BR_NEW_ARCH

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Date:   Fri, 10 Jun 2022 09:21:01 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        peterz@...radead.org, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, acme@...nel.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        Robin Murphy <robin.murphy@....com>,
        Suzuki Poulose <suzuki.poulose@....com>,
        James Clark <james.clark@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH V6 8/8] perf/tools: Add PERF_BR_NEW_ARCH_[N] map for BRBE on arm64 platform

This updates the perf tool with arch specific branch type classification
used for BRBE on arm64 platform as added in the kernel earlier.

Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Will Deacon <will@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-perf-users@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 tools/include/uapi/linux/perf_event.h |  6 ++++++
 tools/perf/util/branch.c              | 13 +++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 193dba2ecdc1..4cf1c8e22cab 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -282,6 +282,12 @@ enum {
 	PERF_BR_PRIV_HV		= 3,
 };
 
+#define PERF_BR_ARM64_FIQ		PERF_BR_NEW_ARCH_1
+#define PERF_BR_ARM64_DEBUG_HALT	PERF_BR_NEW_ARCH_2
+#define PERF_BR_ARM64_DEBUG_EXIT	PERF_BR_NEW_ARCH_3
+#define PERF_BR_ARM64_DEBUG_INST	PERF_BR_NEW_ARCH_4
+#define PERF_BR_ARM64_DEBUG_DATA	PERF_BR_NEW_ARCH_5
+
 #define PERF_SAMPLE_BRANCH_PLM_ALL \
 	(PERF_SAMPLE_BRANCH_USER|\
 	 PERF_SAMPLE_BRANCH_KERNEL|\
diff --git a/tools/perf/util/branch.c b/tools/perf/util/branch.c
index 6d962b0a4532..d40776c44b06 100644
--- a/tools/perf/util/branch.c
+++ b/tools/perf/util/branch.c
@@ -45,11 +45,24 @@ const char *branch_new_type_name(int new_type)
 		"FAULT_ALGN",
 		"FAULT_DATA",
 		"FAULT_INST",
+/*
+ * TODO: This switch should happen on 'session->header.env.arch'
+ * instead, because an arm64 platform perf recording could be
+ * opened for analysis on other platforms as well.
+ */
+#ifdef __aarch64__
+		"ARM64_FIQ",
+		"ARM64_DEBUG_HALT",
+		"ARM64_DEBUG_EXIT",
+		"ARM64_DEBUG_INST",
+		"ARM64_DEBUG_DATA"
+#else
 		"ARCH_1",
 		"ARCH_2",
 		"ARCH_3",
 		"ARCH_4",
 		"ARCH_5"
+#endif
 	};
 
 	if (new_type >= 0 && new_type < PERF_BR_NEW_MAX)
-- 
2.25.1