[llvm] [OFFLOAD] Add plugin with support for Intel oneAPI Level Zero (PR #158900)

[Alex Duran via llvm-commits]

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@@ -0,0 +1,138 @@
+//===--- Level Zero Target RTL Implementation -----------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Plugin interface for SPIR-V/Xe machine
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef OPENMP_LIBOMPTARGET_PLUGINS_NEXTGEN_LEVEL_ZERO_L0PLUGIN_H
+#define OPENMP_LIBOMPTARGET_PLUGINS_NEXTGEN_LEVEL_ZERO_L0PLUGIN_H
+
+#include "AsyncQueue.h"
+#include "L0Defs.h"
+#include "L0Device.h"
+#include "L0Memory.h"
+#include "L0Options.h"
+#include "L0Program.h"
+#include "TLS.h"
+
+namespace llvm::omp::target::plugin {
+
+/// Class implementing the LevelZero specific functionalities of the plugin.
+class LevelZeroPluginTy final : public GenericPluginTy {
+private:
+  /// Number of devices available including subdevices
+  uint32_t NumDevices = 0;
+
+  /// Context (and Driver) specific data
+  std::list<L0ContextTy> ContextList;
+
+  /// L0 device used by each OpenMP device
+  using DeviceContainerTy = llvm::SmallVector<L0DeviceTy *>;
+  DeviceContainerTy L0Devices;
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adurang wrote:

Yes, but again this was mostly required because subdevices. I think I can move this for the most part to the correct place.

https://github.com/llvm/llvm-project/pull/158900