Ackd-by: Samer El-Haj-Mahmoud <samer.el-haj-mahm...@arm.com>
Any update on getting this reviewed/merged? We have downstream platforms that
depend on this and would like to avoid duplication of similar functionality in
platform code.
Thanks!
--Samer
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Ard
> Biesheuvel via groups.io
> Sent: Wednesday, September 22, 2021 7:49 AM
> To: Nhi Pham <n...@os.amperecomputing.com>
> Cc: edk2-devel-groups-io <devel@edk2.groups.io>;
> patc...@amperecomputing.com; Leif Lindholm <l...@nuviainc.com>; Ard
> Biesheuvel <ardb+tianoc...@kernel.org>
> Subject: Re: [edk2-devel] [PATCH v2 1/1] ArmPkg: Implement
> PlatformBootManagerLib for LinuxBoot
>
> On Tue, 7 Sept 2021 at 05:40, Nhi Pham <n...@os.amperecomputing.com>
> wrote:
> >
> > LinuxBoot is a firmware that replaces specific firmware functionality
> > like the UEFI DXE phase with a Linux kernel and runtime. It is built-in
> > UEFI image like an application, which is executed at the end of DXE
> > phase.
> >
> > To achieve the LinuxBoot boot flow "SEC->PEI->DXE->BDS->LinuxBoot",
> > today we use the common well-known GUID of UEFI Shell for LinuxBoot
> > payload, so LinuxBoot developers can effortlessly find the UEFI Shell
> > Application and replace it with the LinuxBoot payload without
> > recompiling platform EDK2 (There might be an issue with a few systems
> > that don't have a UEFI Shell). Also, we have a hard requirement to force
> > the BDS to boot into the LinuxBoot as it is essentially required that
> > only the LinuxBoot boot option is permissible and UEFI is an
> > intermediate bootstrap phase. Considering all the above, it is
> > reasonable to just have a new GUID for LinuxBoot and require a LinuxBoot
> > specific BDS implementation. In addition, with making the BDS
> > implementation simpler, we can reduce many DXE drivers which we think it
> > is not necessary for LinuxBoot booting.
> >
> > This patch adds a new PlatformBootManagerLib implementation which
> > registers only the gArmTokenSpaceGuid.PcdLinuxBootFileGuid for
> LinuxBoot
> > payload as an active boot option. It allows BDS to jump to the LinuxBoot
> > quickly by skipping the UiApp and UEFI Shell.
> >
> > The PlatformBootManagerLib library derived from
> > ArmPkg/Library/PlatformBootManagerLib.
> >
> > Cc: Leif Lindholm <l...@nuviainc.com>
> > Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
> >
> > Signed-off-by: Nhi Pham <n...@os.amperecomputing.com>
>
> Acked-by: Ard Biesheuvel <a...@kernel.org>
>
> > ---
> > ArmPkg/ArmPkg.dec | 8 +
> > ArmPkg/ArmPkg.dsc | 2 +
> > ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBootManagerLib.inf
> | 58 +++++++
> > ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBm.c | 178
> ++++++++++++++++++++
> > 4 files changed, 246 insertions(+)
> >
> > diff --git a/ArmPkg/ArmPkg.dec b/ArmPkg/ArmPkg.dec
> > index 214b2f589217..f68e6ee00860 100644
> > --- a/ArmPkg/ArmPkg.dec
> > +++ b/ArmPkg/ArmPkg.dec
> > @@ -3,6 +3,7 @@
> > #
> > # Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR>
> > # Copyright (c) 2011 - 2021, ARM Limited. All rights reserved.
> > +# Copyright (c) 2021, Ampere Computing LLC. All rights reserved.
> > #
> > # SPDX-License-Identifier: BSD-2-Clause-Patent
> > #
> > @@ -382,3 +383,10 @@ [PcdsFixedAtBuild.common,
> PcdsDynamic.common]
> > #
> > gArmTokenSpaceGuid.PcdPciBusMin|0x0|UINT32|0x00000059
> > gArmTokenSpaceGuid.PcdPciBusMax|0x0|UINT32|0x0000005A
> > +
> > +[PcdsDynamicEx]
> > + #
> > + # This dynamic PCD hold the GUID of a firmware FFS which contains
> > + # the LinuxBoot payload.
> > + #
> > + gArmTokenSpaceGuid.PcdLinuxBootFileGuid|{0x0}|VOID*|0x0000005C
> > diff --git a/ArmPkg/ArmPkg.dsc b/ArmPkg/ArmPkg.dsc
> > index 926986cf7fbb..ffb1c261861e 100644
> > --- a/ArmPkg/ArmPkg.dsc
> > +++ b/ArmPkg/ArmPkg.dsc
> > @@ -5,6 +5,7 @@
> > # Copyright (c) 2011 - 2021, Arm Limited. All rights reserved.<BR>
> > # Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
> > # Copyright (c) Microsoft Corporation.<BR>
> > +# Copyright (c) 2021, Ampere Computing LLC. All rights reserved.
> > #
> > # SPDX-License-Identifier: BSD-2-Clause-Patent
> > #
> > @@ -150,6 +151,7 @@ [Components.common]
> >
> ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.inf
> >
> ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
> > ArmPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
> > +
> ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBootManagerLib.inf
> >
> > ArmPkg/Drivers/ArmCrashDumpDxe/ArmCrashDumpDxe.inf
> > ArmPkg/Drivers/ArmScmiDxe/ArmScmiDxe.inf
> > diff --git
> a/ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBootManagerLib.inf
> b/ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBootManagerLib.inf
> > new file mode 100644
> > index 000000000000..139b6171990a
> > --- /dev/null
> > +++
> b/ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBootManagerLib.inf
> > @@ -0,0 +1,58 @@
> > +## @file
> > +# Implementation for PlatformBootManagerLib library class interfaces.
> > +#
> > +# Copyright (C) 2015-2016, Red Hat, Inc.
> > +# Copyright (c) 2014, ARM Ltd. All rights reserved.<BR>
> > +# Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
> > +# Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
> > +# Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights
> reserved.<BR>
> > +#
> > +# SPDX-License-Identifier: BSD-2-Clause-Patent
> > +#
> > +##
> > +
> > +[Defines]
> > + INF_VERSION = 0x0001001B
> > + BASE_NAME = LinuxBootBootManagerLib
> > + FILE_GUID = 1FA91547-DB23-4F6A-8AF8-3B9782A7F917
> > + MODULE_TYPE = DXE_DRIVER
> > + VERSION_STRING = 1.0
> > + LIBRARY_CLASS = PlatformBootManagerLib|DXE_DRIVER
> > +
> > +#
> > +# The following information is for reference only and not required by the
> build tools.
> > +#
> > +# VALID_ARCHITECTURES = ARM AARCH64
> > +#
> > +
> > +[Sources]
> > + LinuxBootBm.c
> > +
> > +[Packages]
> > + ArmPkg/ArmPkg.dec
> > + MdeModulePkg/MdeModulePkg.dec
> > + MdePkg/MdePkg.dec
> > + ShellPkg/ShellPkg.dec
> > +
> > +[LibraryClasses]
> > + BaseLib
> > + BaseMemoryLib
> > + DebugLib
> > + MemoryAllocationLib
> > + PcdLib
> > + PrintLib
> > + UefiBootManagerLib
> > + UefiBootServicesTableLib
> > + UefiLib
> > + UefiRuntimeServicesTableLib
> > +
> > +[Pcd]
> > + gArmTokenSpaceGuid.PcdLinuxBootFileGuid
> > +
> > +[Guids]
> > + gEfiEndOfDxeEventGroupGuid
> > + gUefiShellFileGuid
> > + gZeroGuid
> > +
> > +[Protocols]
> > + gEfiLoadedImageProtocolGuid
> > diff --git a/ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBm.c
> b/ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBm.c
> > new file mode 100644
> > index 000000000000..f4941780efcd
> > --- /dev/null
> > +++ b/ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBm.c
> > @@ -0,0 +1,178 @@
> > +/** @file
> > + Implementation for PlatformBootManagerLib library class interfaces.
> > +
> > + Copyright (C) 2015-2016, Red Hat, Inc.
> > + Copyright (c) 2014 - 2019, ARM Ltd. All rights reserved.<BR>
> > + Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
> > + Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
> > + Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights
> reserved.<BR>
> > +
> > + SPDX-License-Identifier: BSD-2-Clause-Patent
> > +
> > +**/
> > +
> > +#include <Uefi.h>
> > +
> > +#include <Guid/EventGroup.h>
> > +#include <Library/BaseLib.h>
> > +#include <Library/BaseMemoryLib.h>
> > +#include <Library/DebugLib.h>
> > +#include <Library/DevicePathLib.h>
> > +#include <Library/MemoryAllocationLib.h>
> > +#include <Library/PcdLib.h>
> > +#include <Library/UefiBootManagerLib.h>
> > +#include <Library/UefiBootServicesTableLib.h>
> > +#include <Library/UefiLib.h>
> > +#include <Library/UefiRuntimeServicesTableLib.h>
> > +#include <Protocol/LoadedImage.h>
> > +#include <Protocol/PlatformBootManager.h>
> > +
> > +STATIC
> > +VOID
> > +PlatformRegisterFvBootOption (
> > + CONST EFI_GUID *FileGuid,
> > + CHAR16 *Description,
> > + UINT32 Attributes
> > + )
> > +{
> > + EFI_STATUS Status;
> > + INTN OptionIndex;
> > + EFI_BOOT_MANAGER_LOAD_OPTION NewOption;
> > + EFI_BOOT_MANAGER_LOAD_OPTION *BootOptions;
> > + UINTN BootOptionCount;
> > + MEDIA_FW_VOL_FILEPATH_DEVICE_PATH FileNode;
> > + EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
> > + EFI_DEVICE_PATH_PROTOCOL *DevicePath;
> > +
> > + Status = gBS->HandleProtocol (
> > + gImageHandle,
> > + &gEfiLoadedImageProtocolGuid,
> > + (VOID **)&LoadedImage
> > + );
> > + ASSERT_EFI_ERROR (Status);
> > +
> > + EfiInitializeFwVolDevicepathNode (&FileNode, FileGuid);
> > + DevicePath = DevicePathFromHandle (LoadedImage->DeviceHandle);
> > + ASSERT (DevicePath != NULL);
> > + DevicePath = AppendDevicePathNode (
> > + DevicePath,
> > + (EFI_DEVICE_PATH_PROTOCOL *)&FileNode
> > + );
> > + ASSERT (DevicePath != NULL);
> > +
> > + Status = EfiBootManagerInitializeLoadOption (
> > + &NewOption,
> > + LoadOptionNumberUnassigned,
> > + LoadOptionTypeBoot,
> > + Attributes,
> > + Description,
> > + DevicePath,
> > + NULL,
> > + 0
> > + );
> > + ASSERT_EFI_ERROR (Status);
> > + FreePool (DevicePath);
> > +
> > + BootOptions = EfiBootManagerGetLoadOptions (
> > + &BootOptionCount,
> > + LoadOptionTypeBoot
> > + );
> > +
> > + OptionIndex = EfiBootManagerFindLoadOption (
> > + &NewOption,
> > + BootOptions,
> > + BootOptionCount
> > + );
> > +
> > + if (OptionIndex == -1) {
> > + Status = EfiBootManagerAddLoadOptionVariable (&NewOption,
> MAX_UINTN);
> > + ASSERT_EFI_ERROR (Status);
> > + }
> > + EfiBootManagerFreeLoadOption (&NewOption);
> > + EfiBootManagerFreeLoadOptions (BootOptions, BootOptionCount);
> > +}
> > +
> > +/**
> > + Do the platform specific action before the console is connected.
> > +
> > + Such as:
> > + Update console variable;
> > + Register new Driver#### or Boot####;
> > + Signal ReadyToLock event.
> > +**/
> > +VOID
> > +EFIAPI
> > +PlatformBootManagerBeforeConsole (
> > + VOID
> > + )
> > +{
> > + //
> > + // Signal EndOfDxe PI Event
> > + //
> > + EfiEventGroupSignal (&gEfiEndOfDxeEventGroupGuid);
> > +}
> > +
> > +/**
> > + Do the platform specific action after the console is connected.
> > +
> > + Such as:
> > + Dynamically switch output mode;
> > + Signal console ready platform customized event;
> > + Run diagnostics like memory testing;
> > + Connect certain devices;
> > + Dispatch additional option roms.
> > +**/
> > +VOID
> > +EFIAPI
> > +PlatformBootManagerAfterConsole (
> > + VOID
> > + )
> > +{
> > + EFI_GUID LinuxBootFileGuid;
> > +
> > + CopyGuid (&LinuxBootFileGuid, PcdGetPtr (PcdLinuxBootFileGuid));
> > +
> > + if (!CompareGuid (&LinuxBootFileGuid, &gZeroGuid)) {
> > + //
> > + // Register LinuxBoot
> > + //
> > + PlatformRegisterFvBootOption (
> > + &LinuxBootFileGuid,
> > + L"LinuxBoot",
> > + LOAD_OPTION_ACTIVE
> > + );
> > + } else {
> > + DEBUG ((DEBUG_ERROR, "%a: PcdLinuxBootFileGuid was not set!\n",
> __FUNCTION__));
> > + }
> > +}
> > +
> > +/**
> > + This function is called each second during the boot manager waits the
> > + timeout.
> > +
> > + @param TimeoutRemain The remaining timeout.
> > +**/
> > +VOID
> > +EFIAPI
> > +PlatformBootManagerWaitCallback (
> > + UINT16 TimeoutRemain
> > + )
> > +{
> > + return;
> > +}
> > +
> > +/**
> > + The function is called when no boot option could be launched,
> > + including platform recovery options and options pointing to applications
> > + built into firmware volumes.
> > +
> > + If this function returns, BDS attempts to enter an infinite loop.
> > +**/
> > +VOID
> > +EFIAPI
> > +PlatformBootManagerUnableToBoot (
> > + VOID
> > + )
> > +{
> > + return;
> > +}
> > --
> > 2.17.1
> >
>
>
>
>
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