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From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, mark.rutland@arm.com
Cc: Anshuman Khandual <anshuman.khandual@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>
Subject: [PATCH V7 4/6] arm64/perf: Add branch stack support in struct pmu_hw_events
Date: Thu,  5 Jan 2023 08:40:37 +0530	[thread overview]
Message-ID: <20230105031039.207972-5-anshuman.khandual@arm.com> (raw)
In-Reply-To: <20230105031039.207972-1-anshuman.khandual@arm.com>

This adds branch records buffer pointer in 'struct pmu_hw_events' which can
be used to capture branch records during PMU interrupt. This percpu pointer
here needs to be allocated first before usage.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 include/linux/perf/arm_pmu.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index 64e1b2594025..9184f9b33740 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h
@@ -44,6 +44,13 @@ static_assert((PERF_EVENT_FLAG_ARCH & ARMPMU_EVT_47BIT) == ARMPMU_EVT_47BIT);
 	},								\
 }
 
+#define MAX_BRANCH_RECORDS 64
+
+struct branch_records {
+	struct perf_branch_stack	branch_stack;
+	struct perf_branch_entry	branch_entries[MAX_BRANCH_RECORDS];
+};
+
 /* The events for a given PMU register set. */
 struct pmu_hw_events {
 	/*
@@ -70,6 +77,8 @@ struct pmu_hw_events {
 	struct arm_pmu		*percpu_pmu;
 
 	int irq;
+
+	struct branch_records	*branches;
 };
 
 enum armpmu_attr_groups {
-- 
2.25.1


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  parent reply	other threads:[~2023-01-05 18:51 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-05  3:10 [PATCH V7 0/6] arm64/perf: Enable branch stack sampling Anshuman Khandual
2023-01-05  3:10 ` [PATCH V7 1/6] drivers: perf: arm_pmu: Add new sched_task() callback Anshuman Khandual
2023-01-05  3:10 ` [PATCH V7 2/6] arm64/perf: Add BRBE registers and fields Anshuman Khandual
2023-01-12 13:24   ` Mark Rutland
2023-01-13  3:02     ` Anshuman Khandual
2023-02-08 19:22       ` Mark Rutland
2023-02-09  5:49         ` Anshuman Khandual
2023-02-09 10:08           ` Mark Rutland
2023-01-05  3:10 ` [PATCH V7 3/6] arm64/perf: Add branch stack support in struct arm_pmu Anshuman Khandual
2023-01-12 13:54   ` Mark Rutland
2023-01-13  4:15     ` Anshuman Khandual
2023-02-08 19:26       ` Mark Rutland
2023-02-09  3:40         ` Anshuman Khandual
2023-01-05  3:10 ` Anshuman Khandual [this message]
2023-01-12 13:59   ` [PATCH V7 4/6] arm64/perf: Add branch stack support in struct pmu_hw_events Mark Rutland
2023-01-05  3:10 ` [PATCH V7 5/6] arm64/perf: Add branch stack support in ARMV8 PMU Anshuman Khandual
2023-01-12 14:29   ` Mark Rutland
2023-01-13  5:11     ` Anshuman Khandual
2023-02-08 19:36       ` Mark Rutland
2023-02-13  8:23         ` Anshuman Khandual
2023-02-23 13:47           ` Mark Rutland
2023-03-06  7:59             ` Anshuman Khandual
2023-01-05  3:10 ` [PATCH V7 6/6] arm64/perf: Enable branch stack events via FEAT_BRBE Anshuman Khandual
2023-01-12 16:51   ` Mark Rutland
2023-01-19  2:48     ` Anshuman Khandual
2023-02-08 20:03       ` Mark Rutland
2023-02-20  8:38         ` Anshuman Khandual
2023-02-23 13:38           ` Mark Rutland
2023-01-06 10:23 ` [PATCH V7 0/6] arm64/perf: Enable branch stack sampling James Clark
2023-01-06 11:13   ` Anshuman Khandual
2023-01-11  5:05 ` Anshuman Khandual

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