linux-kernel - [PATCH V3 05/10] perf: Add PERF_BR_NEW_ARCH

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Date:   Mon, 14 Mar 2022 11:28:52 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        peterz@...radead.org, acme@...nel.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        Suzuki Poulose <suzuki.poulose@....com>,
        James Clark <james.clark@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH V3 05/10] perf: Add PERF_BR_NEW_ARCH_[N] map for BRBE on arm64 platform

BRBE captured branch types will overflow perf_branch_entry.type and generic
branch types in perf_branch_entry.new_type. So override each available arch
specific branch type in the following manner to comprehensively process all
reported branch types in BRBE.

PERF_BR_NEW_FIQ            PERF_BR_NEW_ARCH_1
PERF_BR_NEW_DEBUG_HALT     PERF_BR_NEW_ARCH_2
PERF_BR_NEW_DEBUG_EXIT     PERF_BR_NEW_ARCH_3
PERF_BR_NEW_DEBUG_INST     PERF_BR_NEW_ARCH_4
PERF_BR_NEW_DEBUG_DATA     PERF_BR_NEW_ARCH_5

Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 include/uapi/linux/perf_event.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 193dba2ecdc1..37276a737a97 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -282,6 +282,14 @@ enum {
 	PERF_BR_PRIV_HV		= 3,
 };
 
+#ifdef CONFIG_ARM64
+#define PERF_BR_NEW_FIQ		PERF_BR_NEW_ARCH_1
+#define PERF_BR_NEW_DEBUG_HALT	PERF_BR_NEW_ARCH_2
+#define PERF_BR_NEW_DEBUG_EXIT	PERF_BR_NEW_ARCH_3
+#define PERF_BR_NEW_DEBUG_INST	PERF_BR_NEW_ARCH_4
+#define PERF_BR_NEW_DEBUG_DATA	PERF_BR_NEW_ARCH_5
+#endif
+
 #define PERF_SAMPLE_BRANCH_PLM_ALL \
 	(PERF_SAMPLE_BRANCH_USER|\
 	 PERF_SAMPLE_BRANCH_KERNEL|\
-- 
2.25.1