kernel.git/tools/testing/selftests/powerpc/pmu, branch linux-6.3.y

selftests/powerpc/pmu: Fix sample field check in the mmcra_thresh_marked_sample_test

2023-05-11T14:17:28Z

[ Upstream commit 8a32341cf04ba05974931b4664683c2c9fb84e56 ] The testcase verifies the setting of different fields in Monitor Mode Control Register A (MMCRA). In the current code, EV_CODE_EXTRACT macro is used to extract the "sample" field, which then needs to be further processed to fetch rand_samp_elig and rand_samp_mode bits. But the current code is not passing valid sample field to EV_CODE_EXTRACT macro. Patch addresses this by fixing the input for EV_CODE_EXTRACT. Fixes: 29cf373c5766 ("selftests/powerpc/pmu: Add interface test for mmcra register fields") Reported-by: David Binderman Link: https://lore.kernel.org/r/DB6P189MB0568CF002762C6C43AF6DF169CA89@DB6P189MB0568.EURP189.PROD.OUTLOOK.COM Signed-off-by: Kajol Jain Signed-off-by: Michael Ellerman Link: https://msgid.link/20230301170918.69176-1-kjain@linux.ibm.com Signed-off-by: Sasha Levin

selftests/powerpc: Add {read,write}_{long,ulong}

2023-02-09T12:56:45Z

Add helper functions to read and write (unsigned) long values directly from/to files. One of the kernel interfaces uses hex strings, so we need to allow passing a base too. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230203003947.38033-5-bgray@linux.ibm.com

selftests/powerpc: Parse long/unsigned long value safely

2023-02-09T12:56:45Z

Often a file is expected to hold an integral value. Existing functions will use a C stdlib function like atoi or strtol to parse the file. These operations are error prone, with complicated error conditions (atoi returns 0 if not a number, and is undefined behaviour if not in range. strtol returns 0 if not a number, and LONG_MIN/MAX if not in range + sets errno to ERANGE). Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230203003947.38033-4-bgray@linux.ibm.com

selftests/powerpc: Add generic read/write file util

2023-02-09T12:56:45Z

File read/write is reimplemented in about 5 different ways in the various PowerPC selftests. This indicates it should be a common util. Add a common read_file / write_file implementation and convert users to it where (easily) possible. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230203003947.38033-2-bgray@linux.ibm.com

selftests/powerpc: Update bhrb filter sampling test for multiple branch filters

2022-09-28T09:22:13Z

For PERF_SAMPLE_BRANCH_STACK sample type, different branch_sample_type, ie branch filters are supported. The testcase "bhrb_filter_map_test" tests the valid and invalid filter maps in different powerpc platforms. Update this testcase to include scenario to cover multiple branch filters at sametime. Since powerpc doesn't support multiple filters at sametime, expect failure during perf_event_open. Reported-by: Disha Goel Signed-off-by: Athira Rajeev Reviewed-by: Kajol Jain Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220921145255.20972-3-atrajeev@linux.vnet.ibm.com

selftests/powerpc: Add missing PMU selftests to .gitignores

2022-08-15T10:59:17Z

Some recently added selftests don't have their binaries in .gitignores, so add them. I also alphabetically sorted sampling_tests/.gitignore while I was in there. Signed-off-by: Russell Currey Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220812071632.56095-1-ruscur@russell.cc

selftests/powerpc: Avoid GCC 12 uninitialised variable warning

2022-08-01T12:21:18Z

GCC 12 thinks that `actual` might be used uninitialised. It's not, the use is guarded by `bad_mmcr2` which is only set to true at the same point where `actual` is initialised. cycles_with_mmcr2_test.c: In function ‘cycles_with_mmcr2’: cycles_with_mmcr2_test.c:81:17: error: ‘actual’ may be used uninitialized [-Werror=maybe-uninitialized] 81 | printf("Bad MMCR2 value seen is 0x%lx\n", actual); Silence the warning by initialising `actual` to zero. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220801113746.802046-1-mpe@ellerman.id.au

selftests/powerpc: Add missing files to .gitignores

2022-06-29T09:37:04Z

These were missed when the respective tests were added, add them now. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220616070705.1941829-1-mpe@ellerman.id.au

selftests/powerpc/pmu: Add test for hardware cache events

2022-06-28T22:57:45Z

The testcase checks if the transalation of a generic hardware cache event is done properly via perf interface. The hardware cache events has type as PERF_TYPE_HW_CACHE and each event points to raw event code id. Testcase checks different combination of cache level, cache event operation type and cache event result type and verify for a given event code, whether transalation matches with the current cache event mappings via perf interface. Signed-off-by: Kajol Jain Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220610134113.62991-36-atrajeev@linux.vnet.ibm.com

selftests/powerpc/pmu: Add selftest for group constraint check for MMCRA thresh_sel field

2022-06-28T22:57:45Z

Thresh select bits in the event code is used to program thresh_sel field in Monitor Mode Control Register A (MMCRA: 45-47). When scheduling events as a group, all events in that group should match value in these bits. Otherwise event open for the sibling events will fail. Testcase uses event code PM_MRK_INST_CMPL (0x401e0) as leader and another event PM_THRESH_MET (0x101ec) as sibling event, and checks if group constraint checks for thresh_sel field added correctly via perf interface. Signed-off-by: Kajol Jain Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220610134113.62991-35-atrajeev@linux.vnet.ibm.com