linux-dev/tools/testing/selftests/powerpc, branch linus/master

selftests/powerpc/pmu: fix spelling mistake "mis-match" -> "mismatch"

2022-05-22T05:59:54Z

There are a few spelling mistakes in error messages. Fix them. Signed-off-by: Colin Ian King Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220319232025.22067-1-colin.i.king@gmail.com

selftests/powerpc/pmu/ebb: remove fixed_instruction.S

2022-05-22T05:58:31Z

Commit 3752e453f6ba ("selftests/powerpc: Add tests of PMU EBBs") added selftest testcases to verify EBB interface. instruction_count_test.c testcase needs a fixed loop function to count overhead. Instead of using the thirty_two_instruction_loop() in fixed_instruction_loop.S in ebb folder, file is linked with thirty_two_instruction_loop() in loop.S from top folder. Since fixed_instruction_loop.S not used, patch removes the file. Signed-off-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220322045638.10443-1-maddy@linux.ibm.com

selftests/powerpc: Better reporting in spectre_v2

2022-05-22T05:58:28Z

In commit f3054ffd71b5 ("selftests/powerpc: Return skip code for spectre_v2"), the spectre_v2 selftest is updated to be aware of cases where the vulnerability status reported in sysfs is incorrect, skipping the test instead. This happens because qemu can misrepresent the mitigation status of the host to the guest. If the count cache is disabled in the host, and this is correctly reported to the guest, then the guest won't apply mitigations. If the guest is then migrated to a new host where mitigations are necessary, it is now vulnerable because it has not applied mitigations. Update the selftest to report when we see excessive misses, indicative of the count cache being disabled. If software flushing is enabled, also warn that these flushes are just wasting performance. Signed-off-by: Russell Currey [mpe: Rebase and update change log appropriately] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210608064809.199116-1-ruscur@russell.cc

selftests/powerpc: Fix typo in spectre_v2

2022-05-04T09:37:46Z

Signed-off-by: Russell Currey Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210608054851.164659-1-ruscur@russell.cc

selftests/powerpc: Add a test of 4PB SLB handling

2022-04-29T03:43:22Z

Add a test for a bug we had in the 4PB address space SLB handling. It was fixed in commit 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather than thread_struct"). Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220317143925.1030447-1-mpe@ellerman.id.au

selftests/powerpc: Add matrix multiply assist (MMA) test

2022-04-27T06:32:42Z

Adds a simple test of some basic matrix multiply assist (MMA) instructions. Signed-off-by: Alistair Popple Tested-by: Joel Stanley Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200622021832.15870-1-alistair@popple.id.au

selftests/powerpc/pmu: Fix unsigned function returning negative constant

2022-04-26T03:17:00Z

The function __perf_reg_mask has an unsigned return type, but returns a negative constant to indicate an error condition. So we change unsigned to int. Signed-off-by: Haowen Bai Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/1650788802-14402-1-git-send-email-baihaowen@meizu.com

selftest/powerpc: Add PAPR sysfs attributes sniff test

2022-03-07T13:05:00Z

Include a testcase to check if the sysfs files for energy and frequency related have its related attribute files exist and populated Signed-off-by: Pratik R. Sampat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220217105321.52941-3-psampat@linux.ibm.com

selftests/powerpc: Add test for real address error handling

2022-03-07T13:04:59Z

Add test for real address or control memory address access error handling, using NX-GZIP engine. The error is injected by accessing the control memory address using illegal instruction, on successful handling the process attempting to access control memory address using illegal instruction receives SIGBUS. Signed-off-by: Ganesh Goudar Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220107141428.67862-2-ganeshgr@linux.ibm.com

selftests/powerpc/pmu: Add interface test for mmcra register fields

2022-03-01T12:40:58Z

The testcase uses event code 0x35340401e0 to verify the settings for different fields in Monitor Mode Control Register A (MMCRA). The fields include thresh_start, thresh_stop thresh_select, sdar mode, sample and marked bit. Checks if these fields are translated correctly via perf interface to MMCRA. Signed-off-by: Kajol Jain [mpe: Add error checking, drop GET_MMCR_FIELD, add to .gitignore] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220127072012.662451-21-kjain@linux.ibm.com