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This patch introduces the support of LRC context single submission. As GVT context may come from different guests, which require different configuration of render registers. It can't be combined into a dual ELSP submission combo. Only GVT-g will create this kinds of GEM context currently. v8: - Rename the data member in struct i915_gem_context. (Chris) v7: - Fix typos in commit message. (Joonas) v6: - Make GVT code as dead code when !CONFIG_DRM_I915_GVT. (Chris) v5: - Only compile this feature when CONFIG_DRM_I915_GVT=y. (Tvrtko) Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Signed-off-by: Zhi Wang <zhi.a.wang@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: http://patchwork.freedesktop.org/patch/msgid/1466078825-6662-9-git-send-email-zhi.a.wang@intel.com