drm/i915/selftests: Check the context size

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Add a redzone to our context image and check the HW does not write into
after a context save, to verify that we have the correct context size.
(This does vary with feature bits, so test with a live setup that should
match how we run userspace.)

v2: Check the redzone on every context unpin
v3: Use a kernel context to prevent loading garbage for ringbuffer
submission

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190817073711.5897-1-chris@chris-wilson.co.uk

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Chris Wilson 2019-08-17 08:37:11 +01:00

parent eb7c022ddc

commit 9559c87513

2 changed files with 175 additions and 0 deletions

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34

drivers/gpu/drm/i915/gt/intel_lrc.c

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141

drivers/gpu/drm/i915/gt/selftest_context.c

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