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Commit 09a36015 authored by Ashutosh Dixit's avatar Ashutosh Dixit
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drm/i915/perf: Clear out entire reports after reading if not power of 2 size



Clearing out report id and timestamp as means to detect unlanded reports
only works if report size is power of 2. That is, only when report size is
a sub-multiple of the OA buffer size can we be certain that reports will
land at the same place each time in the OA buffer (after rewind). If report
size is not a power of 2, we need to zero out the entire report to be able
to detect unlanded reports reliably.

v2: Add Fixes tag (Umesh)

Fixes: 1cc064dc ("drm/i915/perf: Add support for OA media units")
Reviewed-by: default avatarUmesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: default avatarLionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: default avatarAshutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230523204042.4180641-1-ashutosh.dixit@intel.com
parent 84596e1a
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