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drm/i915: Assert that the kernel_context is hw-id 0 

For easy recognisability, we want the kernel context to have id 0 and
all user contexts to have non-zero ids.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170123113132.18665-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-01-23 11:31:31 +00:00
parent 2f1ac9cc68
commit 5d12fcef4e
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/i915/i915_gem_context.c
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@ -451,6 +451,11 @@ int i915_gem_context_init(struct drm_i915_private *dev_priv)
return PTR_ERR(ctx); return PTR_ERR(ctx);
} }
/* For easy recognisablity, we want the kernel context to be 0 and then
* all user contexts will have non-zero hw_id.
*/
GEM_BUG_ON(ctx->hw_id);
i915_gem_context_clear_bannable(ctx); i915_gem_context_clear_bannable(ctx);
ctx->priority = I915_PRIORITY_MIN; /* lowest priority; idle task */ ctx->priority = I915_PRIORITY_MIN; /* lowest priority; idle task */
dev_priv->kernel_context = ctx; dev_priv->kernel_context = ctx;