Messages in this thread Patch in this message | | | From | Anshuman Khandual <> | Subject | [RFC V1 09/11] perf: Add more generic branch types | Date | Mon, 24 Jan 2022 10:00:51 +0530 |
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This expands generic branch type classification by adding some more entries , that can still be represented with the existing 4 bit 'type' field. While here this also updates the x86 implementation with these new branch types.
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> --- arch/x86/events/intel/lbr.c | 4 ++-- drivers/perf/arm_pmu_brbe.c | 11 +++++++---- include/uapi/linux/perf_event.h | 5 +++++ tools/include/uapi/linux/perf_event.h | 5 +++++ tools/perf/util/branch.c | 7 ++++++- 5 files changed, 25 insertions(+), 7 deletions(-)
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c index 8043213b75a5..9f86fac8c6a5 100644 --- a/arch/x86/events/intel/lbr.c +++ b/arch/x86/events/intel/lbr.c @@ -1336,10 +1336,10 @@ static int branch_map[X86_BR_TYPE_MAP_MAX] = { PERF_BR_SYSCALL, /* X86_BR_SYSCALL */ PERF_BR_SYSRET, /* X86_BR_SYSRET */ PERF_BR_UNKNOWN, /* X86_BR_INT */ - PERF_BR_UNKNOWN, /* X86_BR_IRET */ + PERF_BR_EXPT_RET, /* X86_BR_IRET */ PERF_BR_COND, /* X86_BR_JCC */ PERF_BR_UNCOND, /* X86_BR_JMP */ - PERF_BR_UNKNOWN, /* X86_BR_IRQ */ + PERF_BR_IRQ, /* X86_BR_IRQ */ PERF_BR_IND_CALL, /* X86_BR_IND_CALL */ PERF_BR_UNKNOWN, /* X86_BR_ABORT */ PERF_BR_UNKNOWN, /* X86_BR_IN_TX */ diff --git a/drivers/perf/arm_pmu_brbe.c b/drivers/perf/arm_pmu_brbe.c index 8144514b9997..8d27ad868359 100644 --- a/drivers/perf/arm_pmu_brbe.c +++ b/drivers/perf/arm_pmu_brbe.c @@ -243,18 +243,21 @@ static int brbe_fetch_perf_type(u64 brbinf) case BRBINF_TYPE_TRAP: return PERF_BR_SYSCALL; case BRBINF_TYPE_RET_EXCPT: - return PERF_BR_UNKNOWN; + return PERF_BR_EXPT_RET; case BRBINF_TYPE_IRQ: - return PERF_BR_UNKNOWN; + return PERF_BR_IRQ; + case BRBINF_TYPE_FIQ: + return PERF_BR_FIQ; case BRBINF_TYPE_DEBUG_HALT: + return PERF_BR_DEBUG_HALT; + case BRBINF_TYPE_DEBUG_EXIT: + return PERF_BR_DEBUG_EXIT; case BRBINF_TYPE_SERROR: case BRBINF_TYPE_INST_DEBUG: case BRBINF_TYPE_DATA_DEBUG: case BRBINF_TYPE_ALGN_FAULT: case BRBINF_TYPE_INST_FAULT: case BRBINF_TYPE_DATA_FAULT: - case BRBINF_TYPE_FIQ: - case BRBINF_TYPE_DEBUG_EXIT: return PERF_BR_UNKNOWN; default: pr_warn("unknown branch type captured\n"); diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index 1b65042ab1db..b91d0f575d0c 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -251,6 +251,11 @@ enum { PERF_BR_SYSRET = 8, /* syscall return */ PERF_BR_COND_CALL = 9, /* conditional function call */ PERF_BR_COND_RET = 10, /* conditional function return */ + PERF_BR_EXPT_RET = 11, /* exception return */ + PERF_BR_IRQ = 12, /* irq */ + PERF_BR_FIQ = 13, /* fiq */ + PERF_BR_DEBUG_HALT = 14, /* debug halt */ + PERF_BR_DEBUG_EXIT = 15, /* debug exit */ PERF_BR_MAX, }; diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index 4cd39aaccbe7..1882054e8684 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -251,6 +251,11 @@ enum { PERF_BR_SYSRET = 8, /* syscall return */ PERF_BR_COND_CALL = 9, /* conditional function call */ PERF_BR_COND_RET = 10, /* conditional function return */ + PERF_BR_EXPT_RET = 11, /* exception return */ + PERF_BR_IRQ = 12, /* irq */ + PERF_BR_FIQ = 13, /* fiq */ + PERF_BR_DEBUG_HALT = 14, /* debug halt */ + PERF_BR_DEBUG_EXIT = 15, /* debug exit */ PERF_BR_MAX, }; diff --git a/tools/perf/util/branch.c b/tools/perf/util/branch.c index 2285b1eb3128..74e5e67b1779 100644 --- a/tools/perf/util/branch.c +++ b/tools/perf/util/branch.c @@ -49,7 +49,12 @@ const char *branch_type_name(int type) "SYSCALL", "SYSRET", "COND_CALL", - "COND_RET" + "COND_RET", + "EXPT_RET", + "IRQ", + "FIQ", + "DEBUG_HALT", + "DEBUG_EXIT" }; if (type >= 0 && type < PERF_BR_MAX) -- 2.25.1
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