From: Michael Kubacki <michael.kuba...@microsoft.com> REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3479
The UEFI variable drivers such as VariableRuntimeDxe, VariableSmm, VariableStandaloneMm, etc. (and their dependent protocol/library stack), typically acquire UEFI variable store flash information with PCDs declared in MdeModulePkg. For example: [Pcd] gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64 gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize These PCDs work as-is in the StandaloneMm driver if they are not dynamic such as Dynamic or DynamicEx because PCD services are not readily available in the Standalone MM environment. Platforms that use Standalone MM today, must define these PCDs as FixedAtBuild in their platform build. However, the PCDs do allow platforms to treat the PCDs as Dynamic/DynamicEx and being able to support that is currently a gap for Standalone MM. This patch series introduces a HOB that can be produced by the platform to provide the same information. The HOB list is available to Standalone MM. The PCD declarations are left as-is in MdeModulePkg for backward compatibility. This means unless a platform wants to use the HOB, their code will continue to work with no change (they do not need to produce the HOB). Only if the HOB is found, is its value used instead of the PCDs. Due to the large number of consumers of this information, access to the base address and size values is abstracted in a new library class (as requested in the v1 series) called VariableFlashInfoLib. The API of VariableFlashInfoLib does not bind the underlying data structure to the information returned to library users to allow flexibility in the library implementation in the future. V2 changes: 1. Abstracted flash info data access with VariableFlashInfoLib. 2. Updated package builds in the repo that build the variable and FTW drivers to include VariableFlashInfoLib. 3. Removed a redundant variable assignment in VariableSmm.c. 4. Updated comments in FtwMisc.c and FaultTolerantWritePei.c to indicate driver assumption is UINTN (not UINT32) 5. Added a version field to the VARIABLE_FLASH_INFO structure. Cc: Abner Chang <abner.ch...@hpe.com> Cc: Andrew Fish <af...@apple.com> Cc: Anthony Perard <anthony.per...@citrix.com> Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org> Cc: Benjamin You <benjamin....@intel.com> Cc: Brijesh Singh <brijesh.si...@amd.com> Cc: Erdem Aktas <erdemak...@google.com> Cc: Gerd Hoffmann <kra...@redhat.com> Cc: Guo Dong <guo.d...@intel.com> Cc: Hao A Wu <hao.a...@intel.com> Cc: James Bottomley <j...@linux.ibm.com> Cc: Jian J Wang <jian.j.w...@intel.com> Cc: Jiewen Yao <jiewen....@intel.com> Cc: Jordan Justen <jordan.l.jus...@intel.com> Cc: Julien Grall <jul...@xen.org> Cc: Leif Lindholm <quic_llind...@quicinc.com> Cc: Liming Gao <gaolim...@byosoft.com.cn> Cc: Maurice Ma <maurice...@intel.com> Cc: Min Xu <min.m...@intel.com> Cc: Nickle Wang <nickle.w...@hpe.com> Cc: Peter Grehan <gre...@freebsd.org> Cc: Ray Ni <ray...@intel.com> Cc: Rebecca Cran <rebe...@bsdio.com> Cc: Sami Mujawar <sami.muja...@arm.com> Cc: Sean Rhodes <sean@starlabs.systems> Cc: Sebastien Boeuf <sebastien.bo...@intel.com> Cc: Tom Lendacky <thomas.lenda...@amd.com> Signed-off-by: Michael Kubacki <michael.kuba...@microsoft.com> Michael Kubacki (8): MdeModulePkg: Add Variable Flash Info HOB MdeModulePkg/VariableFlashInfoLib: Add initial library MdeModulePkg/Variable: Consume Variable Flash Info MdeModulePkg/FaultTolerantWrite: Consume Variable Flash Info ArmVirtPkg/ArmVirt.dsc.inc: Add VariableFlashInfoLib EmulatorPkg: Add VariableFlashInfoLib OvmfPkg: Add VariableFlashInfoLib UefiPayloadPkg: Add VariableFlashInfoLib MdeModulePkg/Library/BaseVariableFlashInfoLib/BaseVariableFlashInfoLib.c | 178 ++++++++++++++++++++ MdeModulePkg/Universal/FaultTolerantWriteDxe/FtwMisc.c | 41 +++-- MdeModulePkg/Universal/FaultTolerantWriteDxe/UpdateWorkingBlock.c | 7 +- MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.c | 28 +-- MdeModulePkg/Universal/Variable/Pei/Variable.c | 14 +- MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c | 16 +- MdeModulePkg/Universal/Variable/RuntimeDxe/VariableNonVolatile.c | 14 +- MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c | 17 +- ArmVirtPkg/ArmVirt.dsc.inc | 1 + EmulatorPkg/EmulatorPkg.dsc | 1 + MdeModulePkg/Include/Guid/VariableFlashInfo.h | 39 +++++ MdeModulePkg/Include/Library/VariableFlashInfoLib.h | 68 ++++++++ MdeModulePkg/Library/BaseVariableFlashInfoLib/BaseVariableFlashInfoLib.inf | 48 ++++++ MdeModulePkg/Library/BaseVariableFlashInfoLib/BaseVariableFlashInfoLib.uni | 12 ++ MdeModulePkg/MdeModulePkg.dec | 8 + MdeModulePkg/MdeModulePkg.dsc | 2 + MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.h | 7 +- MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf | 10 +- MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf | 10 +- MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.inf | 10 +- MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf | 10 +- MdeModulePkg/Universal/Variable/Pei/Variable.h | 2 + MdeModulePkg/Universal/Variable/Pei/VariablePei.inf | 5 +- MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h | 7 +- MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf | 5 +- MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf | 5 +- MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf | 5 +- OvmfPkg/AmdSev/AmdSevX64.dsc | 1 + OvmfPkg/Bhyve/BhyveX64.dsc | 1 + OvmfPkg/CloudHv/CloudHvX64.dsc | 1 + OvmfPkg/IntelTdx/IntelTdxX64.dsc | 1 + OvmfPkg/Microvm/MicrovmX64.dsc | 1 + OvmfPkg/OvmfPkgIa32.dsc | 1 + OvmfPkg/OvmfPkgIa32X64.dsc | 1 + OvmfPkg/OvmfPkgX64.dsc | 1 + OvmfPkg/OvmfXen.dsc | 1 + UefiPayloadPkg/UefiPayloadPkg.dsc | 1 + 37 files changed, 486 insertions(+), 94 deletions(-) create mode 100644 MdeModulePkg/Library/BaseVariableFlashInfoLib/BaseVariableFlashInfoLib.c create mode 100644 MdeModulePkg/Include/Guid/VariableFlashInfo.h create mode 100644 MdeModulePkg/Include/Library/VariableFlashInfoLib.h create mode 100644 MdeModulePkg/Library/BaseVariableFlashInfoLib/BaseVariableFlashInfoLib.inf create mode 100644 MdeModulePkg/Library/BaseVariableFlashInfoLib/BaseVariableFlashInfoLib.uni -- 2.28.0.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#88649): https://edk2.groups.io/g/devel/message/88649 Mute This Topic: https://groups.io/mt/90345652/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
