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-rw-r--r--src/intel/vulkan/genX_cmd_buffer.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
index f1b102c9805..ca67bb8b5f2 100644
--- a/src/intel/vulkan/genX_cmd_buffer.c
+++ b/src/intel/vulkan/genX_cmd_buffer.c
@@ -3029,7 +3029,21 @@ cmd_buffer_emit_push_constant(struct anv_cmd_buffer *cmd_buffer,
const struct anv_pipeline_bind_map *bind_map =
&pipeline->shaders[stage]->bind_map;
-#if GEN_GEN >= 12
+#if GEN_GEN >= 9
+ /* This field exists since Gen8. However, the Broadwell PRM says:
+ *
+ * "Constant Buffer Object Control State must be always programmed
+ * to zero."
+ *
+ * This restriction does not exist on any newer platforms.
+ *
+ * We only have one MOCS field for the whole packet, not one per
+ * buffer. We could go out of our way here to walk over all of the
+ * buffers and see if any of them are used externally and use the
+ * external MOCS. However, the notion that someone would use the
+ * same bit of memory for both scanout and a UBO is nuts. Let's not
+ * bother and assume it's all internal.
+ */
c.MOCS = cmd_buffer->device->isl_dev.mocs.internal;
#endif