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Besides the branch type filtering requests, 'event.attr.branch_sample_type' also contains various flags indicating which additional information should be captured, along with the base branch record. These flags help configure the underlying hardware, and capture the branch records appropriately when required e.g after PMU interrupt. But first, this moves an existing helper perf_sample_save_hw_index() into the header before adding some more helpers for other branch sample filter flags. Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20220906084414.396220-1-anshuman.khandual@arm.com |
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