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drm/i915: Simplify testing for am-I-the-kernel-context?

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The kernel context (dev_priv->kernel_context) is unique in that it is
not associated with any user filp - it is the only one with
ctx->file_priv == NULL. This is a simpler test than comparing it against
dev_priv->kernel_context which involves some pointer dancing.

In checking that this is true, we notice that the gvt context is
allocating itself a i915_hw_ppgtt it doesn't use and not flagging that
its file_priv should be invalid.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170106152013.24684-5-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2017-01-06 15:20:13 +00:00
parent e8f9ae9b50
commit 984ff29f74
5 changed files with 21 additions and 5 deletions
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4
drivers/gpu/drm/i915/intel_ringbuffer.c
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@@ -1974,7 +1974,7 @@ static int intel_ring_context_pin(struct intel_engine_cs *engine,
unsigned int flags;
flags = 0;
if (ctx == ctx->i915->kernel_context)
if (i915_gem_context_is_kernel(ctx))
flags = PIN_HIGH;
ret = context_pin(ctx, flags);
@@ -1989,7 +1989,7 @@ static int intel_ring_context_pin(struct intel_engine_cs *engine,
* as during eviction we cannot allocate and pin the renderstate in
* order to initialise the context.
*/
if (ctx == ctx->i915->kernel_context)
if (i915_gem_context_is_kernel(ctx))
ce->initialised = true;
i915_gem_context_get(ctx);