Messages in this thread Patch in this message | | | From | Adrian Hunter <> | Subject | [PATCH 1/7] perf intel-pt: Fix some PGE usage | Date | Fri, 10 Dec 2021 18:22:57 +0200 |
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Packet generation enable (PGE) refers to whether control flow (COFI) packets are being produced. PGE may be false even when branch-tracing is enabled, due to being out-of-context, or outside a filter address range. Fix some missing PGE usage.
Fixes: 839598176b0554 ("perf intel-pt: Allow decoding with branch tracing disabled") Fixes: 7c1b16ba0e26e6 ("perf intel-pt: Add support for decoding FUP/TIP only") Cc: stable@vger.kernel.org # v5.15+ Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 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 5f83937bf8f3..6f6f163161a9 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -2678,6 +2678,7 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in return HOP_IGNORE; case INTEL_PT_TIP_PGD: + decoder->pge = false; if (!decoder->packet.count) { intel_pt_set_nr(decoder); return HOP_IGNORE; @@ -2707,7 +2708,7 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in intel_pt_set_ip(decoder); if (intel_pt_fup_event(decoder)) return HOP_RETURN; - if (!decoder->branch_enable) + if (!decoder->branch_enable || !decoder->pge) *no_tip = true; if (*no_tip) { decoder->state.type = INTEL_PT_INSTRUCTION; @@ -2897,7 +2898,7 @@ static bool intel_pt_psb_with_fup(struct intel_pt_decoder *decoder, int *err) { struct intel_pt_psb_info data = { .fup = false }; - if (!decoder->branch_enable || !decoder->pge) + if (!decoder->branch_enable) return false; intel_pt_pkt_lookahead(decoder, intel_pt_psb_lookahead_cb, &data); @@ -2999,7 +3000,7 @@ static int intel_pt_walk_trace(struct intel_pt_decoder *decoder) break; } intel_pt_set_last_ip(decoder); - if (!decoder->branch_enable) { + if (!decoder->branch_enable || !decoder->pge) { decoder->ip = decoder->last_ip; if (intel_pt_fup_event(decoder)) return 0; -- 2.25.1
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