kernel/tools/testing/selftests/powerpc/pmu, branch linux-rolling-stable

selftests/powerpc/pmu/: Add check_extended_reg_test to .gitignore

2025-12-22T12:25:07Z

Add the check_extended_reg_test binary to .gitignore to avoid accidentally staging the build artifact. Signed-off-by: Gopi Krishna Menon Tested-by: Aditya Bodkhe Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250922004439.2395-1-krishnagopi487@gmail.com

selftests/powerpc/pmu: Update comment with details to understand auxv_generic_compat_pmu() utility function

2025-02-11T06:03:52Z

auxv_generic_compat_pmu() utility function is to detect whether the system is having generic compat PMU. The check is based on base platform value from /proc/self/auxv. Update the comment with details on how auxv is used to detect the platform. Signed-off-by: Athira Rajeev Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250113075858.45137-5-atrajeev@linux.vnet.ibm.com

selftests/powerpc/pmu: Add interface test for extended reg support

2025-02-11T06:03:51Z

The testcase uses check_extended_regs_support and perf_get_platform_reg_mask function to check if the platform has extended reg support. This will help to check if sampling pmu selftest is enabled or not for a given platform. Signed-off-by: Kajol Jain Signed-off-by: Athira Rajeev Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250113075858.45137-4-atrajeev@linux.vnet.ibm.com

tools/testing/selftests/powerpc/pmu: Update comment description to mention ISA v3.1 for power10 and above

2025-02-11T06:03:51Z

Updated the comments in the pmu selftests to include power11/ISA v3.1 where ever required. Signed-off-by: Athira Rajeev Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250113075858.45137-3-atrajeev@linux.vnet.ibm.com

tools/testing/selftests/powerpc: Add check for power11 pvr for pmu selfests

2025-02-11T06:03:51Z

Some of the tests depends on pvr value to choose the event. Example: - event_alternatives_tests_p10: alternative event depends on registered PMU driver which is based on pvr - generic_events_valid_test varies based on platform - bhrb_filter_map_test: again its dependent on pmu to decide which bhrb filter to use - reserved_bits_mmcra_sample_elig_mode: randome sampling mode reserved bits is also varies based on platform Signed-off-by: Athira Rajeev Tested-by: Disha Goel Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250113075858.45137-2-atrajeev@linux.vnet.ibm.com

tools/testing/selftests/powerpc: Enable pmu selftests for power11

2025-02-11T06:03:51Z

Add check for power11 pvr in the selftest utility functions. Selftests uses pvr value to check for platform support inorder to run the tests. pvr is also used to send the extended mask value to capture sampling registers. Update some of the utility functions to use hwcap2 inorder to return platform specific bits from sampling registers. Signed-off-by: Athira Rajeev Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250113075858.45137-1-atrajeev@linux.vnet.ibm.com

selftests/powerpc: Give all tests 2 minutes timeout

2024-11-07T11:36:30Z

Each of the powerpc selftests runs with a timeout of 2 minutes by default (see tools/testing/selftests/powerpc/harness.c). But when tests are run with run_kselftest.sh it uses a timeout of 45 seconds, meaning some tests run OK standalone but fail when run with the test runner. So tell run_kselftest.sh to give each test 130 seconds, that should allow the tests to complete, or be killed by the powerpc test harness after 2 minutes. If for some reason the harness fails, or for the few tests that don't use the harness, the 130 second timeout should catch them if they get stuck. Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/20241106130453.1741013-2-mpe@ellerman.id.au

selftests/powerpc: Lower run time of count_stcx_fail test

2024-11-07T11:36:30Z

The count_stcx_fail test runs for close to or just over 2 minutes, which means it sometimes times out. That's overkill for a test that just demonstrates some PMU counters are working. Drop the 64 billion instruction case, to lower the runtime to ~30s. Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/20241106130453.1741013-1-mpe@ellerman.id.au

selftests/powerpc: Install tests in sub-directories

2024-04-29T13:54:43Z

The sources for the powerpc selftests are arranged into sub-directories. However when the tests are built and installed, the sub-directories are squashed, losing the structure. For example, with the current code the result of installing the selftests is: $ tree tools/testing/selftests/kselftest_install tools/testing/selftests/kselftest_install ├── kselftest │ ├── ktap_helpers.sh │ ├── module.sh │ ├── prefix.pl │ └── runner.sh ├── kselftest-list.txt ├── powerpc │ ├── alignment_handler │ ├── attr_test │ ├── back_to_back_ebbs_test │ ├── bad_accesses │ ├── bhrb_filter_map_test │ ├── bhrb_no_crash_wo_pmu_test │ ├── blacklisted_events_test │ ├── cache_shape │ ├── close_clears_pmcc_test │ ├── context_switch │ ├── copy_first_unaligned ... │ ├── settings ... │ └── wild_bctr └── run_kselftest.sh All the powerpc tests are squashed into the single powerpc directory. In particular, note that there is a single `settings` file, even though there are multiple settings files in the powerpc selftest sources. One of the settings files ends up installed, depending on install order, even if they have different contents. Similarly if there were two tests with the same name in different sub-directories they would clobber each other. Fix it by replicating the directory structure of the source tree into the install directory. The result being for example: $ tree tools/testing/selftests/kselftest_install tools/testing/selftests/kselftest_install ├── kselftest │ ├── ktap_helpers.sh │ ├── module.sh │ ├── prefix.pl │ └── runner.sh ├── kselftest-list.txt ├── powerpc │ ├── alignment │ │ ├── alignment_handler │ │ └── copy_first_unaligned │ ├── benchmarks │ │ ├── context_switch │ │ ├── exec_target │ │ ├── fork │ │ ├── futex_bench │ │ ├── gettimeofday │ │ ├── mmap_bench │ │ ├── null_syscall │ │ └── settings ... │ ├── eeh │ │ ├── eeh-basic.sh │ │ ├── eeh-functions.sh │ │ └── settings ... │ └── vphn │ └── test-vphn └── run_kselftest.sh Note multiple settings files in different sub-directories. This change also has the effect of changing the names of the tests from the point of view of the kselftest runner. Before the tests are named eg: powerpc:copy_first_unaligned powerpc:cache_shape powerpc:reg_access_test After, the test collection names include the sub-directory: powerpc/alignment:copy_first_unaligned powerpc/cache_shape:cache_shape powerpc/pmu/ebb:reg_access_test That means whereas previously all powerpc tests could be run with: $ ./run_kselftest.sh -c powerpc After the change it's necessary to pass a regex that matches all powerpc entries, eg: $ ./run_kselftest.sh -c "powerpc.*" The latter form also works before and after the change. Signed-off-by: Michael Ellerman Link: https://msgid.link/20240422133453.1793988-2-mpe@ellerman.id.au

selftests/powerpc: Convert pmu Makefile to for loop style

2024-04-29T13:54:43Z

The pmu Makefile has grown more sub directories over the years. Rather than open coding the rules for each subdir, use for loops. Signed-off-by: Michael Ellerman Link: https://msgid.link/20240422133453.1793988-1-mpe@ellerman.id.au