diff options
author | Adrian Hunter <adrian.hunter@intel.com> | 2022-01-24 11:41:44 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-02-15 23:08:03 +0300 |
commit | cf0c98e2efa881752481a2b3399d9f344e9f72f3 (patch) | |
tree | b7a9aa1a038f0165bf00317e16dacdfb1d500df7 /tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | |
parent | 3733a98bd209a4bc7c312ee9909182371e9e9982 (diff) | |
download | linux-cf0c98e2efa881752481a2b3399d9f344e9f72f3.tar.xz |
perf intel-pt: decoder: Add MODE.Exec IFLAG processing
As of Intel SDM (https://www.intel.com/sdm) version 076, there is a new
Intel PT feature called Event Trace which adds a bit to the existing
MODE.Exec packet to record the interrupt flag.
Previously, the MODE.Exec packet did not generate any events, so the
new processing required is practically the same as a new packet.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20220124084201.2699795-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/intel-pt-decoder/intel-pt-decoder.c')
-rw-r--r-- | tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 129 |
1 files changed, 117 insertions, 12 deletions
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c index 1a39119706d6..e1d8f7504cbe 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -144,6 +144,8 @@ struct intel_pt_decoder { bool vm_tm_corr_continuous; bool nr; bool next_nr; + bool iflag; + bool next_iflag; enum intel_pt_param_flags flags; uint64_t pos; uint64_t last_ip; @@ -215,6 +217,7 @@ struct intel_pt_decoder { bool set_fup_bep; bool set_fup_cfe_ip; bool set_fup_cfe; + bool set_fup_mode_exec; bool sample_cyc; unsigned int fup_tx_flags; unsigned int tx_flags; @@ -1102,6 +1105,52 @@ static void intel_pt_sample_insn(struct intel_pt_decoder *decoder) decoder->state.type |= INTEL_PT_INSTRUCTION; } +/* + * Sample FUP instruction at the same time as reporting the FUP event, so the + * instruction sample gets the same flags as the FUP event. + */ +static void intel_pt_sample_fup_insn(struct intel_pt_decoder *decoder) +{ + struct intel_pt_insn intel_pt_insn; + uint64_t max_insn_cnt, insn_cnt = 0; + int err; + + decoder->state.insn_op = INTEL_PT_OP_OTHER; + decoder->state.insn_len = 0; + + if (!decoder->branch_enable || !decoder->pge || decoder->hop || + decoder->ip != decoder->last_ip) + return; + + if (!decoder->mtc_insn) + decoder->mtc_insn = true; + + max_insn_cnt = intel_pt_next_sample(decoder); + if (max_insn_cnt != 1) + return; + + err = decoder->walk_insn(&intel_pt_insn, &insn_cnt, &decoder->ip, + 0, max_insn_cnt, decoder->data); + /* Ignore error, it will be reported next walk anyway */ + if (err) + return; + + if (intel_pt_insn.branch != INTEL_PT_BR_NO_BRANCH) { + intel_pt_log_at("ERROR: Unexpected branch at FUP instruction", decoder->ip); + return; + } + + decoder->tot_insn_cnt += insn_cnt; + decoder->timestamp_insn_cnt += insn_cnt; + decoder->sample_insn_cnt += insn_cnt; + decoder->period_insn_cnt += insn_cnt; + + intel_pt_sample_insn(decoder); + + decoder->state.type |= INTEL_PT_INSTRUCTION; + decoder->ip += intel_pt_insn.length; +} + static int intel_pt_walk_insn(struct intel_pt_decoder *decoder, struct intel_pt_insn *intel_pt_insn, uint64_t ip) { @@ -1211,6 +1260,39 @@ out_no_progress: return err; } +static void intel_pt_mode_exec_status(struct intel_pt_decoder *decoder) +{ + bool iflag = decoder->packet.count & INTEL_PT_IFLAG; + + decoder->exec_mode = decoder->packet.payload; + decoder->iflag = iflag; + decoder->next_iflag = iflag; + decoder->state.from_iflag = iflag; + decoder->state.to_iflag = iflag; +} + +static void intel_pt_mode_exec(struct intel_pt_decoder *decoder) +{ + bool iflag = decoder->packet.count & INTEL_PT_IFLAG; + + decoder->exec_mode = decoder->packet.payload; + decoder->next_iflag = iflag; +} + +static void intel_pt_sample_iflag(struct intel_pt_decoder *decoder) +{ + decoder->state.type |= INTEL_PT_IFLAG_CHG; + decoder->state.from_iflag = decoder->iflag; + decoder->state.to_iflag = decoder->next_iflag; + decoder->iflag = decoder->next_iflag; +} + +static void intel_pt_sample_iflag_chg(struct intel_pt_decoder *decoder) +{ + if (decoder->iflag != decoder->next_iflag) + intel_pt_sample_iflag(decoder); +} + static void intel_pt_clear_fup_event(struct intel_pt_decoder *decoder) { decoder->set_fup_tx_flags = false; @@ -1222,11 +1304,14 @@ static void intel_pt_clear_fup_event(struct intel_pt_decoder *decoder) decoder->set_fup_cfe_ip = false; decoder->set_fup_cfe = false; decoder->evd_cnt = 0; + decoder->set_fup_mode_exec = false; + decoder->iflag = decoder->next_iflag; } -static bool intel_pt_fup_event(struct intel_pt_decoder *decoder) +static bool intel_pt_fup_event(struct intel_pt_decoder *decoder, bool no_tip) { enum intel_pt_sample_type type = decoder->state.type; + bool sample_fup_insn = false; bool ret = false; decoder->state.type &= ~INTEL_PT_BRANCH; @@ -1248,6 +1333,12 @@ static bool intel_pt_fup_event(struct intel_pt_decoder *decoder) decoder->state.flags |= INTEL_PT_FUP_IP; ret = true; } + if (decoder->set_fup_mode_exec) { + decoder->set_fup_mode_exec = false; + intel_pt_sample_iflag(decoder); + sample_fup_insn = no_tip; + ret = true; + } if (decoder->set_fup_tx_flags) { decoder->set_fup_tx_flags = false; decoder->tx_flags = decoder->fup_tx_flags; @@ -1304,6 +1395,8 @@ static bool intel_pt_fup_event(struct intel_pt_decoder *decoder) if (ret) { decoder->state.from_ip = decoder->ip; decoder->state.to_ip = 0; + if (sample_fup_insn) + intel_pt_sample_fup_insn(decoder); } else { decoder->state.type = type; } @@ -1336,7 +1429,7 @@ static int intel_pt_walk_fup(struct intel_pt_decoder *decoder) bool no_tip = decoder->pkt_state != INTEL_PT_STATE_FUP; decoder->pkt_state = INTEL_PT_STATE_IN_SYNC; - if (intel_pt_fup_event(decoder) && no_tip) + if (intel_pt_fup_event(decoder, no_tip) && no_tip) return 0; return -EAGAIN; } @@ -1388,6 +1481,7 @@ static int intel_pt_walk_tip(struct intel_pt_decoder *decoder) return err; intel_pt_update_nr(decoder); + intel_pt_sample_iflag_chg(decoder); if (intel_pt_insn.branch == INTEL_PT_BR_INDIRECT) { if (decoder->pkt_state == INTEL_PT_STATE_TIP_PGD) { @@ -1502,6 +1596,7 @@ static int intel_pt_walk_tnt(struct intel_pt_decoder *decoder) decoder->state.to_ip = decoder->last_ip; decoder->ip = decoder->last_ip; intel_pt_update_nr(decoder); + intel_pt_sample_iflag_chg(decoder); return 0; } @@ -1944,7 +2039,7 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder) break; case INTEL_PT_MODE_EXEC: - decoder->exec_mode = decoder->packet.payload; + intel_pt_mode_exec_status(decoder); break; case INTEL_PT_PIP: @@ -2078,6 +2173,7 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder) decoder->state.to_ip = decoder->ip; } intel_pt_update_nr(decoder); + intel_pt_sample_iflag_chg(decoder); return 0; case INTEL_PT_PIP: @@ -2095,7 +2191,7 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder) break; case INTEL_PT_MODE_EXEC: - decoder->exec_mode = decoder->packet.payload; + intel_pt_mode_exec(decoder); break; case INTEL_PT_VMCS: @@ -2777,6 +2873,7 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in decoder->state.from_ip = decoder->ip; decoder->state.to_ip = 0; intel_pt_update_nr(decoder); + intel_pt_sample_iflag_chg(decoder); return HOP_RETURN; case INTEL_PT_FUP: @@ -2791,10 +2888,10 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in decoder->state.type = INTEL_PT_INSTRUCTION; decoder->state.from_ip = decoder->ip; decoder->state.to_ip = 0; - intel_pt_fup_event(decoder); + intel_pt_fup_event(decoder, *no_tip); return HOP_RETURN; } - intel_pt_fup_event(decoder); + intel_pt_fup_event(decoder, *no_tip); decoder->state.type |= INTEL_PT_INSTRUCTION | INTEL_PT_BRANCH; *err = intel_pt_walk_fup_tip(decoder); if (!*err && decoder->state.to_ip) @@ -3058,6 +3155,7 @@ next: decoder->pos); break; } + intel_pt_sample_iflag_chg(decoder); intel_pt_set_ip(decoder); decoder->state.from_ip = 0; decoder->state.to_ip = decoder->ip; @@ -3090,7 +3188,7 @@ next: intel_pt_set_last_ip(decoder); if (!decoder->branch_enable || !decoder->pge) { decoder->ip = decoder->last_ip; - if (intel_pt_fup_event(decoder)) + if (intel_pt_fup_event(decoder, no_tip)) return 0; no_tip = false; break; @@ -3172,8 +3270,15 @@ next: break; case INTEL_PT_MODE_EXEC: - decoder->exec_mode = decoder->packet.payload; - break; + intel_pt_mode_exec(decoder); + err = intel_pt_get_next_packet(decoder); + if (err) + return err; + if (decoder->packet.type == INTEL_PT_FUP) { + decoder->set_fup_mode_exec = true; + no_tip = true; + } + goto next; case INTEL_PT_MODE_TSX: /* MODE_TSX need not be followed by FUP */ @@ -3291,7 +3396,7 @@ next: decoder->fup_cfe_pkt = decoder->packet; decoder->set_fup_cfe = true; if (!decoder->pge) { - intel_pt_fup_event(decoder); + intel_pt_fup_event(decoder, true); return 0; } break; @@ -3403,7 +3508,7 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder) break; case INTEL_PT_MODE_EXEC: - decoder->exec_mode = decoder->packet.payload; + intel_pt_mode_exec_status(decoder); break; case INTEL_PT_MODE_TSX: @@ -3522,7 +3627,7 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder) break; case INTEL_PT_MODE_EXEC: - decoder->exec_mode = decoder->packet.payload; + intel_pt_mode_exec_status(decoder); break; case INTEL_PT_MODE_TSX: |