[PATCH v8 6/8] drm/i915: create context image vma in kernel context

[Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>]

We want to be able to modify other context images from the kernel
context in a following commit. To be able to do this we need to map
the context image into the kernel context's ppgtt.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_gem_context.h |  1 +
 drivers/gpu/drm/i915/intel_lrc.c        | 19 ++++++++++++++-----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.h b/drivers/gpu/drm/i915/i915_gem_context.h
index f40d85448a28..9c313c2edb09 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.h
+++ b/drivers/gpu/drm/i915/i915_gem_context.h
@@ -155,6 +155,7 @@ struct i915_gem_context {
 	struct intel_context {
 		struct i915_gem_context *gem_context;
 		struct i915_vma *state;
+		struct i915_vma *kernel_state; /**/
 		struct intel_ring *ring;
 		u32 *lrc_reg_state;
 		u64 lrc_desc;
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 7314e548fb4e..8a49323f6672 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -2739,7 +2739,7 @@ static int execlists_context_deferred_alloc(struct i915_gem_context *ctx,
 					    struct intel_context *ce)
 {
 	struct drm_i915_gem_object *ctx_obj;
-	struct i915_vma *vma;
+	struct i915_vma *ggtt_vma, *ppgtt_vma;
 	uint32_t context_size;
 	struct intel_ring *ring;
 	struct i915_timeline *timeline;
@@ -2762,9 +2762,17 @@ static int execlists_context_deferred_alloc(struct i915_gem_context *ctx,
 		goto error_deref_obj;
 	}
 
-	vma = i915_vma_instance(ctx_obj, &ctx->i915->ggtt.base, NULL);
-	if (IS_ERR(vma)) {
-		ret = PTR_ERR(vma);
+	ggtt_vma = i915_vma_instance(ctx_obj, &ctx->i915->ggtt.base, NULL);
+	if (IS_ERR(ggtt_vma)) {
+		ret = PTR_ERR(ggtt_vma);
+		goto error_deref_obj;
+	}
+
+	ppgtt_vma = i915_vma_instance(ctx_obj,
+				      &ctx->i915->kernel_context->ppgtt->base,
+				      NULL);
+	if (IS_ERR(ppgtt_vma)) {
+		ret = PTR_ERR(ppgtt_vma);
 		goto error_deref_obj;
 	}
 
@@ -2788,7 +2796,8 @@ static int execlists_context_deferred_alloc(struct i915_gem_context *ctx,
 	}
 
 	ce->ring = ring;
-	ce->state = vma;
+	ce->state = ggtt_vma;
+	ce->kernel_state = ppgtt_vma;
 
 	return 0;
 
-- 
2.17.0

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