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ArmVirtPkg: Add PlatformHasAcpiDtDxe for Cloud Hypervisor 

The ArmVirtPkg\PlatformHasAcpiDtDxe implementation is not common
and is specific for Qemu. So add a Cloud Hypervisor specific
version that decides whether the firmware should expose an ACPI
based or a Device Tree based hardware description to an operating
system.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>

Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
This commit is contained in:
Jianyong Wu 2021-07-05 18:06:39 +08:00 committed by mergify[bot]
parent 4c051c2c65
commit 31fcee6d99
2 changed files with 121 additions and 0 deletions
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79
ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.c Normal file
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/** @file
Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
hardware description to the operating system.
Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Guid/PlatformHasAcpi.h>
#include <Guid/PlatformHasDeviceTree.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiBootServicesTableLib.h>
/** Entry point for the Cloud Hypervisor PlatformHasAcpiDtDxe.
@param [in] ImageHandle Handle for this image.
@param [in] SystemTable Pointer to the EFI system table.
@return EFI_SUCCESS If ACPI or Device Tree based hardware
description protocol was installed.
@return EFI_INVALID_PARAMETER A parameter was invalid.
@return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete
the request.
**/
EFI_STATUS
EFIAPI
PlatformHasAcpiDt (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// If we fail to install any of the necessary protocols below, the OS will be
// unbootable anyway (due to lacking hardware description), so tolerate no
// errors here.
//
if (MAX_UINTN == MAX_UINT64 &&
!PcdGetBool (PcdForceNoAcpi)) {
Status = gBS->InstallProtocolInterface (
&ImageHandle,
&gEdkiiPlatformHasAcpiGuid,
EFI_NATIVE_INTERFACE,
NULL
);
if (EFI_ERROR (Status)) {
goto Failed;
}
return Status;
}
//
// Expose the Device Tree otherwise.
//
Status = gBS->InstallProtocolInterface (
&ImageHandle,
&gEdkiiPlatformHasDeviceTreeGuid,
EFI_NATIVE_INTERFACE,
NULL
);
if (EFI_ERROR (Status)) {
goto Failed;
}
return Status;
Failed:
ASSERT_EFI_ERROR (Status);
CpuDeadLoop ();
//
// Keep compilers happy.
//
return Status;
}

42
ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.inf Normal file
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## @file
# Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
# hardware description to the operating system.
#
# Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
##
[Defines]
INF_VERSION = 0x0001001B
BASE_NAME = CloudHvPlatformHasAcpiDtDxe
FILE_GUID = 71fe72f9-6dc1-199d-5054-13b4200ee88d
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
ENTRY_POINT = PlatformHasAcpiDt
[Sources]
CloudHvHasAcpiDtDxe.c
[Packages]
ArmVirtPkg/ArmVirtPkg.dec
EmbeddedPkg/EmbeddedPkg.dec
MdeModulePkg/MdeModulePkg.dec
MdePkg/MdePkg.dec
[LibraryClasses]
BaseLib
DebugLib
PcdLib
UefiBootServicesTableLib
UefiDriverEntryPoint
[Guids]
gEdkiiPlatformHasAcpiGuid ## SOMETIMES_PRODUCES ## PROTOCOL
gEdkiiPlatformHasDeviceTreeGuid ## SOMETIMES_PRODUCES ## PROTOCOL
[Pcd]
gArmVirtTokenSpaceGuid.PcdForceNoAcpi
[Depex]
gEfiVariableArchProtocolGuid