5.4-stable review patch. If anyone has any objections, please let me know.
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From: Adrian Hunter adrian.hunter@intel.com
[ 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@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 Stable-dep-of: f2d87895cbc4 ("perf intel-pt: Fix async branch flags") Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/util/intel-pt.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index b40832419a279..bead66d65dc0b 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -997,13 +997,16 @@ 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)