drm/i915/perf: Invalidate OA TLB on when closing perf stream

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On running several back to back perf capture sessions involving closing
and opening the perf stream, invalid OA reports are seen in the
beginning of the OA buffer in some sessions. Fix this by invalidating OA
TLB when the perf stream is closed or disabled on gen12.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 00a7f0d715 ("drm/i915/tgl: Add perf support on TGL")
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200309211057.38575-1-umesh.nerlige.ramappa@intel.com

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Umesh Nerlige Ramappa 2020-03-09 14:10:57 -07:00 • committed by Lionel Landwerlin

parent 500f9ac302

commit a639b0c150

2 changed files with 10 additions and 0 deletions

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8

drivers/gpu/drm/i915/i915_perf.c

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2

drivers/gpu/drm/i915/i915_reg.h

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