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authorAdrian Hunter <adrian.hunter@intel.com>2021-12-10 19:22:57 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-12-11 14:19:47 +0300
commit057ae59f5a1d924511beb1b09f395bdb316cfd03 (patch)
treee3a5be2f5251862ba4ea583a9fe1157169c77fc8
parentc897899752478d4c905c56f2b54b99ba82b34e13 (diff)
downloadlinux-057ae59f5a1d924511beb1b09f395bdb316cfd03.tar.xz
perf intel-pt: Fix some PGE (packet generation enable/control flow packets) usage
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: 7c1b16ba0e26e6 ("perf intel-pt: Add support for decoding FUP/TIP only") Fixes: 839598176b0554 ("perf intel-pt: Allow decoding with branch tracing disabled") Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: stable@vger.kernel.org # v5.15+ Link: https://lore.kernel.org/r/20211210162303.2288710-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-decoder.c7
1 files 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 @@ next:
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;