The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 430635a0ef1ce958b7b4311f172694ece2c692b8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023050812-swaddling-stardust-e90d@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^..

Possible dependencies:

430635a0ef1c ("perf intel-pt: Fix CYC timestamps after standalone CBR") 3f05516758be ("perf intel-pt: Accumulate cycle count from TSC/TMA/MTC packets") f3c98c4b5ac8 ("perf intel-pt: Re-factor TIP cases in intel_pt_walk_to_ip") 7b4b4f83881e ("perf intel-pt: Accumulate cycle count from CYC packets") 948e9dc8bb26 ("perf intel-pt: Factor out intel_pt_update_sample_time") 1b6599a9d8e6 ("perf intel-pt: Fix sample timestamp wrt non-taken branches") bea6385789b8 ("perf intel-pt: Implement decoder flags for trace begin / end")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 430635a0ef1ce958b7b4311f172694ece2c692b8 Mon Sep 17 00:00:00 2001 From: Adrian Hunter adrian.hunter@intel.com Date: Mon, 3 Apr 2023 18:48:31 +0300 Subject: [PATCH] perf intel-pt: Fix CYC timestamps after standalone CBR

After a standalone CBR (not associated with TSC), update the cycles reference timestamp and reset the cycle count, so that CYC timestamps are calculated relative to that point with the new frequency.

Fixes: cc33618619cefc6d ("perf tools: Add Intel PT support for decoding CYC packets") Signed-off-by: Adrian Hunter adrian.hunter@intel.com Cc: Adrian Hunter adrian.hunter@intel.com Cc: Ian Rogers irogers@google.com Cc: Jiri Olsa jolsa@kernel.org Cc: Namhyung Kim namhyung@kernel.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230403154831.8651-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com

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 0ac860c8dd2b..7145c5890de0 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -1998,6 +1998,8 @@ static void intel_pt_calc_cbr(struct intel_pt_decoder *decoder)

decoder->cbr = cbr; decoder->cbr_cyc_to_tsc = decoder->max_non_turbo_ratio_fp / cbr; + decoder->cyc_ref_timestamp = decoder->timestamp; + decoder->cycle_cnt = 0;

intel_pt_mtc_cyc_cnt_cbr(decoder); }