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MdePkg: add definition of LINUX_EFI_INITRD_MEDIA_GUID 

Add LINUX_EFI_INITRD_MEDIA_GUID to our collection of GUID definitions,
it can be used in a media device path to specify a Linux style initrd
that can be loaded by the OS using the LoadFile2 protocol.

Move these defines to MdePkg from OvmfPkg as these are relevant to
non-OVMF targets as well.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2564
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Jeff Brasen 2021-08-04 16:03:19 -06:00 committed by mergify[bot]
parent 9abc60f9f7
commit 0856cdc89e
2 changed files with 35 additions and 0 deletions
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30
MdePkg/Include/Guid/LinuxEfiInitrdMedia.h Normal file
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@ -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

5
MdePkg/MdePkg.dec
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@ -818,6 +818,11 @@
#
gTianoCustomDecompressGuid = { 0xA31280AD, 0x481E, 0x41B6, { 0x95, 0xE8, 0x12, 0x7F, 0x4C, 0x98, 0x47, 0x79 }}
#
# GUID used to provide initrd to linux via LoadFile2 protocol
#
gLinuxEfiInitrdMediaGuid = {0x5568e427, 0x68fc, 0x4f3d, {0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68}}
[Guids.IA32, Guids.X64]
## Include/Guid/Cper.h
gEfiIa32X64ErrorTypeCacheCheckGuid = { 0xA55701F5, 0xE3EF, 0x43de, { 0xAC, 0x72, 0x24, 0x9B, 0x57, 0x3F, 0xAD, 0x2C }}