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perf intel-pt: Adjust sample flags for VM-Exit

Browse source 
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@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210218095801.19576-10-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-02-18 11:57:59 +02:00 committed by Arnaldo Carvalho de Melo
parent 65faca5ce8
commit 695fc45106
1 changed files with 7 additions and 4 deletions
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11
tools/perf/util/intel-pt.c
View file

@ -1201,13 +1201,16 @@ 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)