diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2021-02-18 12:58:00 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-02-18 22:15:38 +0300 |
| commit | 19854e45b39a8b6b9ba4f33f07750ca9891572cb (patch) | |
| tree | 5ea5bdc156eb03969037f788cfde7b3d036edfbd /tools/perf/util/intel-pt.c | |
| parent | 695fc4510615f8db40ebaf7a2c011f0a594b5f77 (diff) | |
| download | linux-19854e45b39a8b6b9ba4f33f07750ca9891572cb.tar.xz | |
perf intel-pt: Split VM-Entry and VM-Exit branches
Events record a single cpumode so the tools cannot handle a branch from
the host machine to a virtual machine, or vice versa. Split it in two so
that each branch can have a different cpumode.
E.g. host ip -> guest ip
becomes: host ip -> 0
0 -> guest ip
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/20210218095801.19576-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/intel-pt.c')
| -rw-r--r-- | tools/perf/util/intel-pt.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index cafb3943d5f6..f6e28ac231b7 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -2171,7 +2171,27 @@ static int intel_pt_sample(struct intel_pt_queue *ptq) } if (pt->sample_branches) { - err = intel_pt_synth_branch_sample(ptq); + if (state->from_nr != state->to_nr && + state->from_ip && state->to_ip) { + struct intel_pt_state *st = (struct intel_pt_state *)state; + u64 to_ip = st->to_ip; + u64 from_ip = st->from_ip; + + /* + * perf cannot handle having different machines for ip + * and addr, so create 2 branches. + */ + st->to_ip = 0; + err = intel_pt_synth_branch_sample(ptq); + if (err) + return err; + st->from_ip = 0; + st->to_ip = to_ip; + err = intel_pt_synth_branch_sample(ptq); + st->from_ip = from_ip; + } else { + err = intel_pt_synth_branch_sample(ptq); + } if (err) return err; } |