As context structure is shared memory for CPU/GPU, Wa_22016122933 is
needed for this memory block as well.
Signed-off-by: Zhanjun Dong <zhanjun.dong@xxxxxxxxx>
CC: Fei Yang <fei.yang@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index a4ec20aaafe2..1b710102390b 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1092,8 +1092,15 @@ __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine)
obj = i915_gem_object_create_lmem(engine->i915, context_size,
I915_BO_ALLOC_PM_VOLATILE);
- if (IS_ERR(obj))
+ if (IS_ERR(obj)) {
obj = i915_gem_object_create_shmem(engine->i915, context_size);
+ /*
+ * Wa_22016122933: For MTL the shared memory needs to be mapped
+ * as WC on CPU side and UC (PAT index 2) on GPU side
+ */
+ if (IS_METEORLAKE(engine->i915))
+ i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
+ }
if (IS_ERR(obj))
return ERR_CAST(obj);
--
2.34.1
