1 files changed, 30 insertions, 0 deletions
diff --git a/MdePkg/Include/Guid/LinuxEfiInitrdMedia.h b/MdePkg/Include/Guid/LinuxEfiInitrdMedia.h
new file mode 100644
index 0000000000..d436a7533c
--- /dev/null
+++ b/MdePkg/Include/Guid/LinuxEfiInitrdMedia.h
@@ -0,0 +1,30 @@
+/** @file
+  GUID definition for the Linux Initrd media device path
+
+  Linux distro boot generally relies on an initial ramdisk (initrd) which is
+  provided by the loader, and which contains additional kernel modules (for
+  storage and network, for instance), and the initial user space startup code,
+  i.e., the code which brings up the user space side of the entire OS.
+
+  In order to provide a standard method to locate this initrd, the GUID defined
+  in this file is used to describe the device path for a LoadFile2 Protocol
+  instance that is responsible for loading the initrd file.
+
+  The kernel EFI Stub will locate and use this instance to load the initrd,
+  therefore the firmware/loader should install an instance of this to load the
+  relevant initrd.
+
+  Copyright (c) 2020, Arm, Ltd. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef LINUX_EFI_INITRD_MEDIA_GUID_H_
+#define LINUX_EFI_INITRD_MEDIA_GUID_H_
+
+#define LINUX_EFI_INITRD_MEDIA_GUID \
+  {0x5568e427, 0x68fc, 0x4f3d, {0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68}}
+
+extern EFI_GUID gLinuxEfiInitrdMediaGuid;
+
+#endif