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| author | Adrian Hunter <[email protected]> | 2023-03-20 20:35:17 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2023-03-20 19:25:40 -0300 |
| commit | 052072f69f28864cebaeb6ca9dc2c9825b72c834 (patch) | |
| tree | 4cc3714f511e99fd561a54b7022d8e9f76a31e5f /tools/perf/scripts/python/flamegraph.py | |
| parent | 34f576c95d1bd1be3f123c2d1f3db084e5e72583 (diff) | |
perf intel-pt: Add support for new branch instructions ERETS and ERETU
Intel Flexible Return and Event Delivery (FRED) adds instructions ERETS
(return to supervisor) and ERETU (return to user). Intel PT instruction
decoder needs to know about these instructions because they are
branch instructions. Similar to IRET instructions, when the decoder
encounters one of these instructions it will match it to a TIP (target
instruction pointer) packet that informs what the branch destination is.
The existing "x86 instruction decoder - new instructions" test can be
used to test the result e.g.
$ perf test -v ins |& grep eret
Decoded ok: f2 0f 01 ca erets
Decoded ok: f3 0f 01 ca eretu
Signed-off-by: Adrian Hunter <[email protected]>
Acked-by: Ian Rogers <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions