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| author |   Kajol Jain <kjain@linux.ibm.com> | 2022-06-10 19:10:42 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-06-28 23:57:51 +1000 |
| commit | 61d89900315aa25f6da0c1bc800ce295d74d69f1 (patch) | |
| tree | ed09bf9ff46e715fc496fc08a2a471c14108f850 /tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c | |
| parent | selftests/powerpc/pmu: Add interface test for mmcra_thresh_cmp fields (diff) | |
| download | linux-dev-61d89900315aa25f6da0c1bc800ce295d74d69f1.tar.xz linux-dev-61d89900315aa25f6da0c1bc800ce295d74d69f1.zip | |
selftests/powerpc/pmu: Add support for branch sampling in get_intr_regs function
Add support for sample type as PERF_SAMPLE_BRANCH_STACK in sampling
tests. This change is a precursor/helper for sampling testcases, that
test branck stack feature in perf interface.
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220610134113.62991-5-atrajeev@linux.vnet.ibm.com
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c index 6e30b455cbd6..5a26fc3a9706 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c @@ -259,13 +259,32 @@ u64 *get_intr_regs(struct event *event, void *sample_buff) u64 *intr_regs; size_t size = 0; - if ((type ^ PERF_SAMPLE_REGS_INTR)) + if ((type ^ (PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_BRANCH_STACK)) && + (type ^ PERF_SAMPLE_REGS_INTR)) return NULL; intr_regs = (u64 *)perf_read_first_sample(sample_buff, &size); if (!intr_regs) return NULL; + if (type & PERF_SAMPLE_BRANCH_STACK) { + /* + * PERF_RECORD_SAMPLE and PERF_SAMPLE_BRANCH_STACK: + * struct { + * struct perf_event_header hdr; + * u64 number_of_branches; + * struct perf_branch_entry[number_of_branches]; + * u64 data[]; + * }; + * struct perf_branch_entry { + * u64 from; + * u64 to; + * u64 misc; + * }; + */ + intr_regs += ((*intr_regs) * 3) + 1; + } + /* * First entry in the sample buffer used to specify * PERF_SAMPLE_REGS_ABI_64, skip perf regs abi to access |