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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2021-01-11 22:52:20 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2021-01-12 09:17:06 +0000 |
| commit | f7452c7cbd5b5dfb9a6c84cb20bea04c89be50cd (patch) | |
| tree | 8d91a2411a6ef5381f3b494421914ac0f1aafcd3 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 008ead6ef8f588a8c832adfe9db201d9be5fd410 (diff) | |
drm/i915: Allow the sysadmin to override security mitigations
The clear-residuals mitigation is a relatively heavy hammer and under some
circumstances the user may wish to forgo the context isolation in order
to meet some performance requirement. Introduce a generic module
parameter to allow selectively enabling/disabling different mitigations.
To disable just the clear-residuals mitigation (on Ivybridge, Baytrail,
or Haswell) use the module parameter: i915.mitigations=auto,!residuals
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/1858
Fixes: 47f8253d2b89 ("drm/i915/gen7: Clear all EU/L3 residual contexts")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: stable@vger.kernel.org # v5.7
Reviewed-by: Jon Bloomfield <jon.bloomfield@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210111225220.3483-3-chris@chris-wilson.co.uk
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