This is a note to let you know that I've just added the patch titled perf intel-pt: Fix some PGE (packet generation enable/control flow packets) usage to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: perf-intel-pt-fix-some-pge-packet-generation-enable-control-flow-packets-usage.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 057ae59f5a1d924511beb1b09f395bdb316cfd03 Mon Sep 17 00:00:00 2001 From: Adrian Hunter <adrian.hunter@xxxxxxxxx> Date: Fri, 10 Dec 2021 18:22:57 +0200 Subject: perf intel-pt: Fix some PGE (packet generation enable/control flow packets) usage From: Adrian Hunter <adrian.hunter@xxxxxxxxx> commit 057ae59f5a1d924511beb1b09f395bdb316cfd03 upstream. 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@xxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v5.15+ Link: https://lore.kernel.org/r/20211210162303.2288710-2-adrian.hunter@xxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -2677,6 +2677,7 @@ static int intel_pt_hop_trace(struct int return HOP_IGNORE; case INTEL_PT_TIP_PGD: + decoder->pge = false; if (!decoder->packet.count) { intel_pt_set_nr(decoder); return HOP_IGNORE; @@ -2706,7 +2707,7 @@ static int intel_pt_hop_trace(struct int 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; @@ -2896,7 +2897,7 @@ static bool intel_pt_psb_with_fup(struct { 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); @@ -2998,7 +2999,7 @@ 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; Patches currently in stable-queue which might be from adrian.hunter@xxxxxxxxx are queue-5.15/perf-intel-pt-fix-some-pge-packet-generation-enable-control-flow-packets-usage.patch queue-5.15/perf-intel-pt-fix-intel_pt_fup_event-assumptions-about-setting-state-type.patch queue-5.15/perf-intel-pt-fix-next-err-value-walking-trace.patch queue-5.15/perf-intel-pt-fix-error-timestamp-setting-on-the-decoder-error-path.patch queue-5.15/perf-intel-pt-fix-state-setting-when-receiving-overflow-ovf-packet.patch queue-5.15/perf-intel-pt-fix-sync-state-when-a-psb-synchronization-packet-is-found.patch queue-5.15/perf-intel-pt-fix-missing-instruction-events-with-q-option.patch