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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2021-01-11 22:52:20 +0000 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2021-01-12 19:03:40 +0200 |
| commit | 984cadea032b103c5824a5f29d0a36b3e9df6333 (patch) | |
| tree | d84bf049e6056edec8eee78c9e9c6ccf581ed153 /drivers/gpu/drm/i915/i915_mitigations.h | |
| parent | 09aa9e45863e9e25dfbf350bae89fc3c2964482c (diff) | |
| download | linux-984cadea032b103c5824a5f29d0a36b3e9df6333.tar.bz2 | |
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
(cherry picked from commit f7452c7cbd5b5dfb9a6c84cb20bea04c89be50cd)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_mitigations.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_mitigations.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_mitigations.h b/drivers/gpu/drm/i915/i915_mitigations.h new file mode 100644 index 000000000000..1359d8135287 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_mitigations.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ + +#ifndef __I915_MITIGATIONS_H__ +#define __I915_MITIGATIONS_H__ + +#include <linux/types.h> + +bool i915_mitigate_clear_residuals(void); + +#endif /* __I915_MITIGATIONS_H__ */ |