1 files changed, 77 insertions, 0 deletions
diff --git a/OvmfPkg/Library/PlatformBootManagerLibLight/QemuKernel.c b/OvmfPkg/Library/PlatformBootManagerLibLight/QemuKernel.c
new file mode 100644
index 0000000000..7dc59ae14d
--- /dev/null
+++ b/OvmfPkg/Library/PlatformBootManagerLibLight/QemuKernel.c
@@ -0,0 +1,77 @@
+/** @file
+  Try to load an EFI-stubbed ARM Linux kernel from QEMU's fw_cfg.
+
+  This implementation differs from OvmfPkg/Library/LoadLinuxLib. An EFI
+  stub in the subject kernel is a hard requirement here.
+
+  Copyright (C) 2014-2016, Red Hat, Inc.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/QemuLoadImageLib.h>
+#include <Library/ReportStatusCodeLib.h>
+
+#include "PlatformBm.h"
+
+//
+// The entry point of the feature.
+//
+
+/**
+  Download the kernel, the initial ramdisk, and the kernel command line from
+  QEMU's fw_cfg. Construct a minimal SimpleFileSystem that contains the two
+  image files, and load and start the kernel from it.
+
+  The kernel will be instructed via its command line to load the initrd from
+  the same Simple FileSystem.
+
+  @retval EFI_NOT_FOUND         Kernel image was not found.
+  @retval EFI_OUT_OF_RESOURCES  Memory allocation failed.
+  @retval EFI_PROTOCOL_ERROR    Unterminated kernel command line.
+
+  @return                       Error codes from any of the underlying
+                                functions. On success, the function doesn't
+                                return.
+**/
+EFI_STATUS
+EFIAPI
+TryRunningQemuKernel (
+  VOID
+  )
+{
+  EFI_STATUS  Status;
+  EFI_HANDLE  KernelImageHandle;
+
+  Status = QemuLoadKernelImage (&KernelImageHandle);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Signal the EFI_EVENT_GROUP_READY_TO_BOOT event.
+  //
+  EfiSignalEventReadyToBoot ();
+
+  REPORT_STATUS_CODE (
+    EFI_PROGRESS_CODE,
+    (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_PC_READY_TO_BOOT_EVENT)
+    );
+
+  //
+  // Start the image.
+  //
+  Status = QemuStartKernelImage (&KernelImageHandle);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((
+      DEBUG_ERROR,
+      "%a: QemuStartKernelImage(): %r\n",
+      __func__,
+      Status
+      ));
+  }
+
+  QemuUnloadKernelImage (KernelImageHandle);
+
+  return Status;
+}