[llvm] [offload] Use pinned memory for KLE (PR #213767)

[Robert Imschweiler via llvm-commits]

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@@ -1027,6 +1027,20 @@ struct GenericDeviceTy : public DeviceAllocatorTy {
   virtual Error queryAsyncImpl(__tgt_async_info &AsyncInfo, bool ReleaseQueue,
                                bool *IsQueueWorkCompleted) = 0;
 
+  /// Indicate whether dataSubmitImpl has a faster path for host buffers that
+  /// are registered as pinned memory. If a plugin returns true, the kernel
+  /// launch environment is copied into a pinned host buffer before it is
+  /// submitted, so that its transfer takes that path.
+  virtual bool hasFastSubmitFromPinnedMemory() const { return false; }
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ro-i wrote:

done

https://github.com/llvm/llvm-project/pull/213767