drm/i915/selftests: Use a sacrificial context for hang testing
authorChris Wilson <chris@chris-wilson.co.uk>
Mon, 5 Feb 2018 15:24:29 +0000 (15:24 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Mon, 5 Feb 2018 15:27:24 +0000 (15:27 +0000)
commit8ec21a7c4b52165211b47932c665ab2e9ca488ee
tree267a619ba732a02b0374bd8110234696781acb1d
parenta8b66f2c2f3e03b70a5e72cb5034f8aff669bf34
drm/i915/selftests: Use a sacrificial context for hang testing

Avoid injecting hangs in to the i915->kernel_context in case the GPU
reset leaves corruption in the context image in its wake (leading to
continual failures and system hangs after the selftests are ostensibly
complete). Use a sacrificial kernel_context instead.

v2: Closing a context is tricky; export a function (for selftests) from
i915_gem_context.c to get it right.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180205152431.12163-2-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/selftests/intel_hangcheck.c
drivers/gpu/drm/i915/selftests/mock_context.c
drivers/gpu/drm/i915/selftests/mock_context.h