Messages in this thread Patch in this message | | | From | Anshuman Khandual <> | Subject | [RFC V1 10/11] perf: Expand perf_branch_entry.type | Date | Mon, 24 Jan 2022 10:00:52 +0530 |
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Current perf_branch_entry.type is a 4 bits field just enough to accommodate 16 generic branch types. This is insufficient to accommodate platforms like arm64 which has much more branch types. Lets just expands this field into a 6 bits one, which can now hold 64 generic branch types. This also adds more generic branch types and updates the BRBE driver as required.
Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-perf-users@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- drivers/perf/arm_pmu_brbe.c | 7 ++++++- include/uapi/linux/perf_event.h | 10 ++++++++-- tools/include/uapi/linux/perf_event.h | 10 ++++++++-- tools/perf/util/branch.c | 8 +++++++- 4 files changed, 29 insertions(+), 6 deletions(-)
diff --git a/drivers/perf/arm_pmu_brbe.c b/drivers/perf/arm_pmu_brbe.c index 8d27ad868359..7cd1208c6c58 100644 --- a/drivers/perf/arm_pmu_brbe.c +++ b/drivers/perf/arm_pmu_brbe.c @@ -253,12 +253,17 @@ static int brbe_fetch_perf_type(u64 brbinf) case BRBINF_TYPE_DEBUG_EXIT: return PERF_BR_DEBUG_EXIT; case BRBINF_TYPE_SERROR: + return PERF_BR_SERROR; case BRBINF_TYPE_INST_DEBUG: + return PERF_BR_DEBUG_INST; case BRBINF_TYPE_DATA_DEBUG: + return PERF_BR_DEBUG_DATA; case BRBINF_TYPE_ALGN_FAULT: + return PERF_BR_FAULT_ALGN; case BRBINF_TYPE_INST_FAULT: + return PERF_BR_FAULT_INST; case BRBINF_TYPE_DATA_FAULT: - return PERF_BR_UNKNOWN; + return PERF_BR_FAULT_DATA; default: pr_warn("unknown branch type captured\n"); return PERF_BR_UNKNOWN; diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index b91d0f575d0c..361fdc6b87a0 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -256,6 +256,12 @@ enum { PERF_BR_FIQ = 13, /* fiq */ PERF_BR_DEBUG_HALT = 14, /* debug halt */ PERF_BR_DEBUG_EXIT = 15, /* debug exit */ + PERF_BR_DEBUG_INST = 16, /* instruciton debug */ + PERF_BR_DEBUG_DATA = 17, /* data debug */ + PERF_BR_FAULT_ALGN = 18, /* alignment fault */ + PERF_BR_FAULT_DATA = 19, /* data fault */ + PERF_BR_FAULT_INST = 20, /* instruction fault */ + PERF_BR_SERROR = 21, /* system error */ PERF_BR_MAX, }; @@ -1370,8 +1376,8 @@ struct perf_branch_entry { in_tx:1, /* in transaction */ abort:1, /* transaction abort */ cycles:16, /* cycle count to last branch */ - type:4, /* branch type */ - reserved:40; + type:6, /* branch type */ + reserved:38; }; union perf_sample_weight { diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index 1882054e8684..9a82b8aaed93 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -256,6 +256,12 @@ enum { PERF_BR_FIQ = 13, /* fiq */ PERF_BR_DEBUG_HALT = 14, /* debug halt */ PERF_BR_DEBUG_EXIT = 15, /* debug exit */ + PERF_BR_DEBUG_INST = 16, /* instruciton debug */ + PERF_BR_DEBUG_DATA = 17, /* data debug */ + PERF_BR_FAULT_ALGN = 18, /* alignment fault */ + PERF_BR_FAULT_DATA = 19, /* data fault */ + PERF_BR_FAULT_INST = 20, /* instruction fault */ + PERF_BR_SERROR = 21, /* system error */ PERF_BR_MAX, }; @@ -1370,8 +1376,8 @@ struct perf_branch_entry { in_tx:1, /* in transaction */ abort:1, /* transaction abort */ cycles:16, /* cycle count to last branch */ - type:4, /* branch type */ - reserved:40; + type:6, /* branch type */ + reserved:38; }; union perf_sample_weight { diff --git a/tools/perf/util/branch.c b/tools/perf/util/branch.c index 74e5e67b1779..1e216ea2e2a8 100644 --- a/tools/perf/util/branch.c +++ b/tools/perf/util/branch.c @@ -54,7 +54,13 @@ const char *branch_type_name(int type) "IRQ", "FIQ", "DEBUG_HALT", - "DEBUG_EXIT" + "DEBUG_EXIT", + "DEBUG_INST", + "DEBUG_DATA", + "FAULT_ALGN", + "FAULT_DATA", + "FAULT_INST", + "SERROR" }; if (type >= 0 && type < PERF_BR_MAX) -- 2.25.1
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