linux

iv/linux

History

Adrian Hunter 052072f69f 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 <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20230320183517.15099-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2023-03-20 19:25:40 -03:00

alpha

perf tools: Add empty Build files for architectures lacking them

2015-08-06 16:24:15 -03:00

arc/annotate

perf annotate: Introduce basic support for ARC

2018-12-17 14:59:42 -03:00

arm

perf cs-etm: Avoid printing warning in cs_etm_is_ete() check

2023-03-13 17:42:27 -03:00

arm64

perf kvm: Use macro to replace variable 'decode_str_len'