drm/i915/gen12: Invalidate aux table entries forcibly

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Aux table invalidation can fail on update. So
next access may cause memory access to be into stale entry.

Proposed workaround is to invalidate entries between
all batchbuffers.

v2: correct register address (Yang)
v3: respect the order (Chris)

References bspec#43904, hsdes#1809175790
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chuansheng Liu <chuansheng.liu@intel.com>
Cc: Rafael Antognolli <rafael.antognolli@intel.com>
Cc: Yang A Shi <yang.a.shi@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200506165310.1239-1-mika.kuoppala@linux.intel.com

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Mika Kuoppala 2020-05-06 19:53:10 +03:00 • committed by Chris Wilson

parent 0c7c0c8e6f

commit d248b371f7

2 changed files with 17 additions and 1 deletions

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16

drivers/gpu/drm/i915/gt/intel_lrc.c

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2

drivers/gpu/drm/i915/i915_reg.h

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