Commit 695fc451 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

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



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: default avatarAdrian Hunter <adrian.hunter@intel.com>
Acked-by: default avatarAndi 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 65faca5c

tools/perf/util/intel-pt.c

+7 −4
Original line number Diff line number Diff line
@@ -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)