perf/x86/intel/lbr: Create kmem_cache for the LBR context data

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A new kmem_cache method is introduced to allocate the PMU specific data
task_ctx_data, which requires the PMU specific code to create a
kmem_cache.

Currently, the task_ctx_data is only used by the Intel LBR call stack
feature, which is introduced since Haswell. The kmem_cache should be
only created for Haswell and later platforms. There is no alignment
requirement for the existing platforms.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1593780569-62993-18-git-send-email-kan.liang@linux.intel.com

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Kan Liang 2020-07-03 05:49:23 -07:00 • committed by Peter Zijlstra

parent 217c2a633e

commit 33cad28449

1 changed files with 19 additions and 2 deletions

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arch/x86/events/intel/lbr.c

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