From 984cadea032b103c5824a5f29d0a36b3e9df6333 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 11 Jan 2021 22:52:20 +0000 Subject: 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 Cc: Joonas Lahtinen Cc: Jon Bloomfield Cc: Rodrigo Vivi Cc: stable@vger.kernel.org # v5.7 Reviewed-by: Jon Bloomfield Reviewed-by: Rodrigo Vivi 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 --- drivers/gpu/drm/i915/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpu/drm/i915/Makefile') diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index e5574e506a5c..6d9e81ea67f4 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -38,6 +38,7 @@ i915-y += i915_drv.o \ i915_config.o \ i915_irq.o \ i915_getparam.o \ + i915_mitigations.o \ i915_params.o \ i915_pci.o \ i915_scatterlist.o \ -- cgit v1.2.3