This is the kind of test that I would like to add for VG, with the necessary additions to the attr test framework for kernel version detection so that it always passes even when run on old kernels. This approach isn't very scalable, for example the change to fix the tests for PERF_FORMAT_LOST [1] affects many tests so they would all have to be duplicated. Of course there is still the option to weaken those tests and make them accept any value. It also doesn't apply to any of the shell script tests which would need to re-implement something similar to this. I'm interested to see if people think this is useful, at least it is for this one test. [1]: https://lore.kernel.org/linux-perf-users/20220926144948.223641-1-james.clark@xxxxxxx/T/#t James Clark (4): perf test: Add ability to test exit code for attr tests perf test: Add mechanism for skipping attr tests on auxiliary vector values perf test: Add mechanism for skipping attr tests on kernel versions perf test arm64: Add attr tests for new VG register tools/perf/tests/attr.py | 71 +++++++++++++++++-- .../attr/test-record-user-regs-no-sve-aarch64 | 9 +++ .../test-record-user-regs-old-sve-aarch64 | 10 +++ .../attr/test-record-user-regs-sve-aarch64 | 14 ++++ 4 files changed, 99 insertions(+), 5 deletions(-) create mode 100644 tools/perf/tests/attr/test-record-user-regs-no-sve-aarch64 create mode 100644 tools/perf/tests/attr/test-record-user-regs-old-sve-aarch64 create mode 100644 tools/perf/tests/attr/test-record-user-regs-sve-aarch64 -- 2.28.0
