Some tests are designed to exercise the limits of the HW and may trigger unintended side-effects making the machine unusable. This should not be executed by default, but are still useful for early platform validation.
References: https://bugs.freedesktop.org/show_bug.cgi?id=103453 Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com> --- drivers/gpu/drm/i915/Kconfig.debug | 14 ++++++++++++++ drivers/gpu/drm/i915/selftests/intel_uncore.c | 8 ++++---- 2 files changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug index aed7d207ea84..19c77c6feb24 100644 --- a/drivers/gpu/drm/i915/Kconfig.debug +++ b/drivers/gpu/drm/i915/Kconfig.debug @@ -90,6 +90,20 @@ config DRM_I915_SELFTEST If in doubt, say "N". +config DRM_I915_SELFTEST_BROKEN + bool "Enable broken and dangerous selftests" + depends on DRM_I915_SELFTEST + depends on BROKEN + default n + help + This option enables the execution of selftests that are "dangerous" + and may trigger unintended HW side-effects as they break strict + rules given in the HW specification. For science. + + Recommended for masochistic driver developers only. + + If in doubt, say "N". + config DRM_I915_LOW_LEVEL_TRACEPOINTS bool "Enable low level request tracing events" depends on DRM_I915 diff --git a/drivers/gpu/drm/i915/selftests/intel_uncore.c b/drivers/gpu/drm/i915/selftests/intel_uncore.c index 3cac22eb47ce..f52a4ab9aa98 100644 --- a/drivers/gpu/drm/i915/selftests/intel_uncore.c +++ b/drivers/gpu/drm/i915/selftests/intel_uncore.c @@ -120,10 +120,10 @@ static int intel_uncore_check_forcewake_domains(struct drm_i915_private *dev_pri !IS_CHERRYVIEW(dev_priv)) return 0; - if (IS_VALLEYVIEW(dev_priv)) /* XXX system lockup! */ - return 0; - - if (IS_BROADWELL(dev_priv)) /* XXX random GPU hang afterwards! */ + /* + * This test may lockup the machine or cause GPU hangs afterwards. + */ + if (!IS_ENABLED(CONFIG_DRM_I915_SELFTEST_BROKEN)) return 0; valid = kzalloc(BITS_TO_LONGS(FW_RANGE) * sizeof(*valid), -- 2.15.0.rc2 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
