This is a note to let you know that I've just added the patch titled
perf intel-pt: Adjust sample flags for VM-Exit
to the 4.19-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-adjust-sample-flags-for-vm-exit.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 95275d823f85ce83f8ccc47ccc04777c33cac628
Author: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Thu Feb 18 11:57:59 2021 +0200
perf intel-pt: Adjust sample flags for VM-Exit
[ Upstream commit 695fc4510615f8db40ebaf7a2c011f0a594b5f77 ]
Use the change of NR to detect whether an asynchronous branch is a VM-Exit.
Note VM-Entry is determined from the vmlaunch or vmresume instruction,
in which case, sample flags will show "VMentry" even if the VM-Entry fails.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210218095801.19576-10-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Stable-dep-of: f2d87895cbc4 ("perf intel-pt: Fix async branch flags")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index e90f1044a8397..e073c7108c6c9 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -899,13 +899,16 @@ static void intel_pt_sample_flags(struct intel_pt_queue *ptq)
if (ptq->state->flags & INTEL_PT_ABORT_TX) {
ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT;
} else if (ptq->state->flags & INTEL_PT_ASYNC) {
- if (ptq->state->to_ip)
+ if (!ptq->state->to_ip)
+ ptq->flags = PERF_IP_FLAG_BRANCH |
+ PERF_IP_FLAG_TRACE_END;
+ else if (ptq->state->from_nr && !ptq->state->to_nr)
+ ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
+ PERF_IP_FLAG_VMEXIT;
+ else
ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
PERF_IP_FLAG_ASYNC |
PERF_IP_FLAG_INTERRUPT;
- else
- ptq->flags = PERF_IP_FLAG_BRANCH |
- PERF_IP_FLAG_TRACE_END;
ptq->insn_len = 0;
} else {
if (ptq->state->from_ip)
