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The VariableRuntimeDxe links with NvVarStoreFormattedLib which is required to establish the dependency on OvmfPkg\VirtNorFlashDxe. The VirtNorFlashDxe installs the gEdkiiNvVarStoreFormattedGuid to indicate it has finished initialising the flash variable storage and that the variable service can be dispatched. However, the kvmtool guest firmware dynamically detects if CFI flash is absent and sets PcdEmuVariableNvModeEnable to TRUE indicating emulated runtime variable must be used. Therefore, in this scenario install the gEdkiiNvVarStoreFormattedGuid so that the variable service can be dispatched. Also link the NorFlashKvmtoolLib as a NULL library so that it can discover if the CFI flash is absent and setup the PCD PcdEmuVariableNvModeEnable. This is required in case the NorFlashDxe is not yet dispatched. Signed-off-by: Sami Mujawar <sami.mujawar@arm.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
46 lines
1.3 KiB
INI
46 lines
1.3 KiB
INI
## @file
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# The KvmtoolPlatformDxe performs the platform specific initialization like:
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# - It decides if the firmware should expose ACPI or Device Tree-based
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# hardware description to the operating system.
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#
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# Copyright (c) 2018 - 2023, Arm Limited. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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##
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[Defines]
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INF_VERSION = 0x0001001B
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BASE_NAME = KvmtoolPlatformDxe
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FILE_GUID = 7479CCCD-D721-442A-8C73-A72DBB886669
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MODULE_TYPE = DXE_DRIVER
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VERSION_STRING = 1.0
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ENTRY_POINT = KvmtoolPlatformDxeEntryPoint
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[Sources]
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KvmtoolPlatformDxe.c
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[Packages]
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OvmfPkg/OvmfPkg.dec
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EmbeddedPkg/EmbeddedPkg.dec
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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[LibraryClasses]
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BaseLib
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DebugLib
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UefiBootServicesTableLib
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UefiDriverEntryPoint
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[Guids]
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gEdkiiNvVarStoreFormattedGuid ## SOMETIMES_PRODUCES ## PROTOCOL
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gEdkiiPlatformHasAcpiGuid ## SOMETIMES_PRODUCES ## PROTOCOL
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gEdkiiPlatformHasDeviceTreeGuid ## SOMETIMES_PRODUCES ## PROTOCOL
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[Pcd]
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gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvModeEnable
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gUefiOvmfPkgTokenSpaceGuid.PcdForceNoAcpi
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[Depex]
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TRUE
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