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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-11-10 14:26:33 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-11-10 17:23:10 +0000 |
| commit | d2b4b97933f5adacfba42dc3b9200d0e21fbe2c4 (patch) | |
| tree | ed930479bbd2f36b2f28997fc4f2ccb2f37824e3 /drivers/gpu/drm/i915/i915_drv.c | |
| parent | f4e15af7e21861445821d5f09922ef7e695269a1 (diff) | |
| download | op-kernel-dev-d2b4b97933f5adacfba42dc3b9200d0e21fbe2c4.zip op-kernel-dev-d2b4b97933f5adacfba42dc3b9200d0e21fbe2c4.tar.gz | |
drm/i915: Record the default hw state after reset upon load
Take a copy of the HW state after a reset upon module loading by
executing a context switch from a blank context to the kernel context,
thus saving the default hw state over the blank context image.
We can then use the default hw state to initialise any future context,
ensuring that each starts with the default view of hw state.
v2: Unmap our default state from the GTT after stealing it from the
context. This should stop us from accidentally overwriting it via the
GTT (and frees up some precious GTT space).
Testcase: igt/gem_ctx_isolation
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171110142634.10551-7-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 1b440f2..d97fe9c 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -406,6 +406,9 @@ static int i915_getparam(struct drm_device *dev, void *data, */ value = 1; break; + case I915_PARAM_HAS_CONTEXT_ISOLATION: + value = intel_engines_has_context_isolation(dev_priv); + break; case I915_PARAM_SLICE_MASK: value = INTEL_INFO(dev_priv)->sseu.slice_mask; if (!value) |
